Machinery Operating Manual Transfer
April 18, 2017 | Author: Emin Alim | Category: N/A
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LNGC GRACE ACACIA Symbols and Colour Scheme ............................................................................. 2 Electrical Symbol List ........................................................................................ 3 Abbreviation ....................................................................................................... 4 Part 1 : Engineering Data for Main Equipment 1.1 Main Turbine..................................................................................... 1 - 1 1.1.1 Manufacturing Specification................................................... 1 - 5 1.1.2 Main Turbine Operation Instructions...................................... 1 - 7 1.2 Main Boilers.................................................................................... 1 - 10 1.2.1 Main Boilers Planning Data.................................................. 1 - 10 1.2.2 Instructions for Main Boiler Operation................................. 1 - 13 1.3 Generator Turbine ........................................................................... 1 - 19 1.4 Main Feed Water Pump Turbine ..................................................... 1 - 25 1.4.1 Operating Procedure ............................................................. 1 - 26 1.5 Diesel Generator Engine ................................................................. 1 - 27 1.6 Fresh Water Generator .................................................................... 1 - 30 1.7 Bow Thruster................................................................................... 1 - 32 Illustrations 1.1a Main Turbine General Arrangement................................................ 1 - 4 1.3.1a Governing System .................................................................... 1 - 20 1.3.1b Control Oil Press. Adjusting Valve ........................................... 1 - 22 1.3.1c Time Schedule for Starting of Turbine Generator .................... 1 - 23 1.6.1a Fresh Water Generator................................................................ 1 - 29 1.7.1a Bow Thruster Control System .................................................... 1 - 31 Part 2 : Machinery System 2.1 Steam Systems ................................................................................ 2 - 2 2.1.1 Superheated Steam System................................................... 2 - 2 2.1.2 Desuperheated Steam & Steam Dump Systems ................... 2 - 4 2.1.3 Bleed System ........................................................................ 2 - 6 2.1.4 0.6MPa Steam System .......................................................... 2 - 8 2.2 Condensate and Feed Water Systems ............................................ 2 - 10 2.2.1 Main Condensate System.................................................... 2 - 10 2.2.2 Aux.Condensate Water System .......................................... 2 - 14 2.2.3 Boiler Feed Water System .................................................. 2 - 18 2.3 Sea Water Systems........................................................................ 2 - 22 2.3.1 Main Sea Water Circulating Systems ................................. 2 - 22 2.3.2 Cooling Sea Water Service System .................................... 2 - 26 2.3.3 Marine Growth Preventing System..................................... 2 - 28 2.4 Centralised Fresh Water Cooling System...................................... 2 - 30 2.5 Boiler Water Sampling and Treatment Systems ............................ 2 - 32 2.6 Fuel Oil and Fuel Gas Service Systems ........................................ 2 - 36 2.6.1 Fuel Oil Bunkering and Transfer Systems.......................... 2 - 36 2.6.2 DO Purifying and G/E Fuel Oil System ............................. 2 - 40 2.6.3 Boiler Fuel Oil Service Systems ......................................... 2 - 42 2.6.4 Boiler Fuel Gas Service System ......................................... 2 - 46 2.6.5 IGG and Incinerator Fuel Oil System ................................. 2 - 48 2.7 Lubricating Oil Systems................................................................ 2 - 50 2.7.1 Main Turbine Lubricating Oil System ................................ 2 - 50
Machinery Operating Manual 2.7.2 Stern Tube Lubricating Oil System..................................... 2 - 54 2.7.3 Lubricating Oil Transfer and Purifying System .................. 2 - 56 2.8 Bilge System ................................................................................. 2 - 60 2.9 Compressed Air Systems............................................................... 2 - 64 2.9.1 Control Air Systems............................................................ 2 - 64 2.9.2 Starting Air Systems ........................................................... 2 - 66 2.9.3 Working Air Systems.......................................................... 2 - 68 2.9.4 Emergency Shut Off Air System......................................... 2 - 70 2.10 Steering Gear............................................................................... 2 - 72 2.11 Electrical Power Generators ........................................................ 2 - 74 2.11.1 Turbine Generator............................................................. 2 - 74 2.11.2 Diesel Generator Engine ................................................... 2 - 78 2.11.3 Emergency Diesel Generator ............................................ 2 - 82 2.12 Electrical Power Distribution ...................................................... 2 - 84 2.12.1 Distribution and Loading .................................................. 2 - 84 2.12.2 Turbine Generators ........................................................... 2 - 87 2.12.3 Diesel Generator ............................................................... 2 - 88 2.12.4 Batteries & Battery Charger.............................................. 2 - 90 2.12.5 Un-Interruptible Power Supplies....................................... 2 - 91 2.13 Accommodation Services ............................................................ 2 - 94 2.13.1 Provision Refrigeration System ........................................ 2 - 94 2.13.2 Accommodation and Air Conditioning Plant.................... 2 - 98 2.13.3 Package Air Conditioner................................................. 2 - 102 2.14 Fresh Water General Service Systems ....................................... 2 - 104 2.14.1 Fresh Water General Service System.............................. 2 - 104 2.14.2 Distilled Water Filling Service System........................... 2 - 104 2.14.3 Sanitary Discharge System ............................................. 2 - 106 Illustration 2.1.1a Superheated Steam System......................................................... 2 - 1 2.1.2a Desuperheated Steam & Steam Dump System ........................... 2 - 3 2.1.3a Bleed System .............................................................................. 2 - 5 2.1.4a 0.6MPa Steam System ................................................................ 2 - 7 2.2.1a Main Condensate System ........................................................... 2 - 9 2.2.2a Aux. Condensate Water System................................................ 2 - 13 2.2.3a Boiler Feed Water System ........................................................ 2 - 17 2.3.1a Main Sea Water Circulating System......................................... 2 - 21 2.3.2a Cooling Sea Water Service System .......................................... 2 - 25 2.3.3a MGPS System .......................................................................... 2 - 27 2.4a Centralised Fresh Water System.................................................. 2 - 29 2.5a Boiler Water Sampling and Treatment System ........................... 2 - 31 2.6.1a Fuel Oil Bunkering and Transfer System ................................. 2 - 35 2.6.2a Diesel Oil Purifying and G/E Fuel Oil System......................... 2 - 39 2.6.3a Boiler Fuel Oil & Fuel Gas Service System ............................. 2 - 41 2.6.5a IGG and Incinerator Fuel Oil System ....................................... 2 - 47 2.7.1a Main Turbine Lubrication Oil System...................................... 2 - 49 2.7.2a Stern Tube Lubricating Oil System .......................................... 2 - 53 2.7.3a Lubricating Oil Transfer System .............................................. 2 - 55 2.7.3b Lubricating Oil Purifying System............................................. 2 - 57 2.8a Engine Room Bilge System......................................................... 2 - 59
1
2.8b Oily Bilge Separator ....................................................................2 - 61 2.9.1a Control Air System ...................................................................2 - 63 2.9.2a Starting Air System...................................................................2 - 65 2.9.3a Working Air System .................................................................2 - 67 2.9.4a Emergency Shut-Off Air System ..............................................2 - 69 2.10a Steering Gear Hydraulic Diagram..............................................2 - 71 2.11.1a Turbine Generators Control Oil System..................................2 - 73 2.11.1b Turbine Exhaust Steam System ..............................................2 - 75 2.11.2a Diesel Generator Engine .........................................................2 - 77 2.11.3a Em’cy Generator Engine.........................................................2 - 81 2.12.1a Distribution and Loading ........................................................2 - 83 2.12.2a Turbine Generators .................................................................2 - 87 2.12.3a Diesel Generator .....................................................................2 - 88 2.12.4a Battery Charger Alarm Display Monitor ................................2 - 89 2.13.1a Provision Refrigeration System ..............................................2 - 93 2.13.2a Aux. Air Conditioning Plant ...................................................2 - 97 2.13.2b Main Air Conditioning Plant ..................................................2 - 99 2.13.3a Package Air Conditioner .......................................................2 - 101 2.14.1a Fresh Water General Service System ....................................2 - 103 2.14.3a Sanitary Discharge System ...................................................2 - 105 Part 3 Integrated Automation System (IAS) 3.1 IAS for general.................................................................................. 3 - 4 3.2 DEO Open Supervisory Station (DOSS)......................................... 3 - 4 3.3 DOHS (DEO Open History Station) ................................................. 3 - 8 3.4 DOGS (DEO Open Gateway Station) ............................................... 3 - 8 3.5 DOPC ІІ (DEO Process Controller ІІ) .............................................. 3 - 8 3.6 Alarm Management........................................................................... 3 - 9 3.6.1 Classification of Alarm .......................................................... 3 - 9 3.6.2 Alarm Acceptance Procedure ................................................. 3 - 9 3.7 Alarm Printout................................................................................. 3 - 10 3.8 Fast Alarm Function........................................................................ 3 - 10 3.9 Data Logging................................................................................... 3 - 10 3.10 Extension Alarm and Engineer’s Alarm ........................................ 3 - 11 3.10.1 Extension Alarm................................................................. 3 - 12 3.10.2 Engineer’s Alarm and Patrolman System........................... 3 - 15 Illustration 3.1.1a IAS Overview (System Configuration) ........................................ 3 - 1 3.1.1b IAS Overview (System Connection)............................................ 3 - 2 3.1.1c IAS Overview (Power Supply Concept) ...................................... 3 - 3 3.6a Alarm Acceptance Procedure .......................................................... 3 - 9 3.7a Alarm Printer Configuration.......................................................... 3 - 10 3.7b Example of Alarm Printout ........................................................... 3 - 10 3.8a Example of Alarm Printout............................................................ 3 - 10 3.10a Extension Alarm and Engineer Call System................................ 3 - 11 3.10.1a Layout of Group Alarm Indication ........................................... 3 - 12 3.10.1b Alarm Annunciation Sequence for Machinery System............. 3 - 13 3.10.1c Alarm Annunciation Sequence for Cargo System .................... 3 - 14 3.10.1d Duty Selector Indication for Machinery................................... 3 - 14
Index
Machinery Operating Manual
LNGC GRACE ACACIA 3.10.1e Duty Selector Indication for Cargo .................................. 3 - 14 Part 4 : Main Boiler Control System 4.1 Main Boiler Control System ............................................................. 4 - 1 4.2 Burner Management System............................................................. 4 - 3 4.3 Automatic Combustion Control ........................................................ 4 - 5 4.4 BMS and ACC Logic Diagram ......................................................... 4 - 7 4.4.1 Burner Management System Logic Diagram.......................... 4 - 7 4.4.2 Automatic Boiler Control System Diagram .......................... 4 - 23
7.9 30% MCR FO Burning Condition................................................... 7 - 9 7.10 Cargo Unloading Condition (FO)................................................ 7 - 10 7.11 Cargo Loading Condition (FO) ................................................... 7 - 11 7.12 Hotel Load Condition (FO) ......................................................... 7 - 12 Part 8 : General Information 8.1 Maker List .........................................................................................8 - 1 8.2 Tank Capacity Plan and List..............................................................8 - 5 8.3 Lubrication Oil Chart ........................................................................8 - 7
Part 5 : Main Turbine Remote Control System 5.1 Main Turbine Remote Control Specification ....................................5 - 2 5.2 Control Function ...............................................................................5 - 4 5.3 Transfter of Control Location ..........................................................5 - 4 5.4 Telegraph...........................................................................................5 - 8 5.5 Function and Interlock ......................................................................5 - 9 5.5.1 Program Control .........................................................................5 - 9 5.5.2 Auto Slow Down and Preventing Alarm.....................................5 - 9 5.5.3 Auto Spinning ...........................................................................5 - 10 Illustration 5.1a System Block Diagram....................................................................5 - 1 5.2a Main Turbine Remote Contorl Diagram..........................................5 - 3 5.4a Telegraph System Block Diagram ...................................................5 - 7 5.5.3a Auto Spinning ...........................................................................5 - 10 Part 6 : Description of Critical Operation 6.1 Flooding in the Engine Room ........................................................... 6 - 1 6.2 Main Boiler Emergency Operation ................................................... 6 - 2 6.2.1 One-Boiler Operation ............................................................. 6 - 2 6.2.2 Operation of Stand by FDF..................................................... 6 - 4 6.2.3 Emergency Operationl ............................................................ 6 - 6 6.3 H.P. and L.P. Turbine Solo Running Operation................................. 6 - 8 6.4 Restore Engine Room Plant from Dead Ship Condition ................... 6 - 9 Illustrations 6.1a Floodable time, control position and method for valve operation ... 6 - 1 6.2.2a 6.2.2a Operation of Stand by FDF .............................................. 6 - 3 6.2.3a Boiler Emergency Operation Panel .............................................. 6 - 5 6.3a H.P. and L.P. Turbine Solo Running Operation ............................... 6 - 7 Part 7 : Steam Plant Heat Balance System 7.1 100% MCR FO Burning Condition................................................. 7.2 100% MCR DUAL Burning Condition........................................... 7.3 100% MCR BOIL OFF GAS Burning Condition ........................... 7.4 90% MCR FO Burning Condition (Guarantee Condition).............. 7.5 90% MCR FO Burning Condition .................................................. 7.6 90% MCR DUAL Burning Condition............................................. 7.7 90% MCR BOIL OFF GAS Burning Condition ............................. 7.8 50% MCR FO Burning Condition ..................................................
7-1 7-2 7-3 7-4 7-5 7-6 7-7 7-8
2
Index
Machinery Operating Manual
LNGC GRACE ACACIA Symbols and Colour Scheme Symbol
Description
Symbol
Crossing Pipe, Not Connected Crossing Pipe, Connected Flexible Hose Sliding Type Expansion Joint Sleeve Type Expansion Joint
Description
Symbol Symbol
Description Description
Hose Globe Valve
Float Type Air Vent Head Without Fire Screen
Hose Angle Valve
Float Type Air Vent Head With Fire Screen
Pressure Reducing Valve
Filling Cap
Three Way Valve
Sounding Head With Cap (Deck Stand Type)
Three Way Cock
Sounding Head with Self Closing Valve
Three Way Control Valve
Rose Box
Ball Valve
Mud Box
Solenoid Valve
Box Type Strainer
Expansion Bend Bellows type Expansion Joint Blank Flange
S
Spectacle Flange
A
Air Motor Operated Valve
Orifice M
※
Cast Steel or Duct Cast Iron
Colour
Description LNG Liquid LNG Spray LNG Vapour Inert Gas Superheated Steam De-superheated Steam Nitrogen
Electric Motor Operated Valve
Y-type Strainer
Reducer
Pressure Control Valve
Steam Trap
Spool Piece
Manual Operated Butterfly Valve
Steam Trap With Strainer
Globe Angle
Hydraulic Remote Operated Butterfly Valve
Hand Pump
Angle Valve
Pneumatic Remote Operated Butterfly Valve
Ejector, Eductor
Hydraulic Cylinder Type Actuator
Drain Hold With Plug
Pneumatic Cylinder Type Actuator
Oil Coaming
Intermediate Position Control Valve Actuator
Suction Bellmouth
Auto Control Valve Actuator
Open Scupper
Surface Valve
Scupper for Indoor Part
Condensate/Distilled Water
Vapour Control Valve
Electric Motor Driven Pump
Compressed Air
Hand Operated
Pressure Gauge
Deck Stand
Compound Gauge
Self Closing Valve (Angle)
Manual Hydraulic Operated Deck Stand
Flow Meter
Gate Valve (Sluice)
Goose Neck Air Vent Pipe
Sight Glass
Center Flange
Screw Down Non-return Valve (Globe) Screw Down Non-return Valve (Angle) Lift Check Valve (Globe) Lift Check Valve (Angle) Swing Check Valve Flap Check Valve Relief Valve (Globe) Relief Valve (Angle) Self Closing Valve (Globe)
A
A
3
Lubricating Oil Heavy Fuel Oil Glycol Water Sea Water Fresh Water Hydraulic Oil Diesel Oil
Bilge Sludge & Waste Oil Fire Sea Water
Symbols and Colour Scheme
Machinery Operating Manual
LNGC GRACE ACACIA Electrical Symbol List
GSP
C P
OVERCURRENT RELAY
TRANSFORMER
STARTER (DIRECT ON LINE)
LOCAL GROUP STARTER PANEL
LD
LIQUID SENSOR
CURRENT TO PRESS CONVERTER
I
CONTROL PANEL
P
PD
PRESS TO CURRENT CONVERTER
P
440V DIST. BOARD
I
I O
SIG RB
GJB/XX
I/O CABINET (ALARM MONITORING SYSTEM)
WHISTLE RELAY BOX
GROUP JUNCTION BOX XX (XX=LOCATION)
BL
Trip
BELL
AUTOMATIC TRIP
RECTIFIER EQUIPMENT
MAKING CONTACT AUXILIARY RELAY CONTRACT
LD
220V POWER DIST. BOARD
BREAKING
RESISTOR
RPM PICK-UP
RPM
LD
VARIABLE RESISTOR
GAUGE
LIGHTING DIST. BOARD
MAKING CONTACT WITH TIME LIMIT IN CLOSING
L
INTRINSICALLY SAFE CIRCUIT
IS
AIR CIRCUIT BREAKER M
WITH TIME LIMIT IN OPENING MCCB 3 PHASE
BATTERY CHARGER
LIMIT SWITCH
LM
BREAKING
CAPACITOR
ZENER BARRIER BOX
ZBK
10A
MAKING CONTACT
FUSE
FLICKER RELAY BATTERY
SOLENOID VALVE
SPACE HEATER (ELEMENT TYPE)
VOLTAGE REFERENCE SELECTOR
VR
COMPOUND GAUGE
DPI
DIFFERENTIAL PRESSURE INDICATOR
DPS
DIFFERENTIAL PRESSURE SWITCH
DPT
DIFFERENTIAL PRESSURE TRANSMITTER
FD
FLOW DETECTOR
FS
FLOW SWITCH
FT
FLOW TRANSMITTER
IL
INDICATION LAMP
LAH
LEVEL ALARM HIGH
LAL
LEVEL ALARM LOW
LI
LEVEL INDICATOR
LIC
LEVEL INDICATING CONTROLLER
LS
LEVEL SWITCH
LT
LEVEL TRANSMITTER
PAH
PRESSURE ALARM HIGH
PAL
PRESSURE ALARM LOW
PI
PRESSURE INDICATOR
PIC
PRESSURE INDICATING CONTROLLER
PIAH
PRESSURE INDICATOR ALARM HIGH
PIAL
PRESSURE INDICATOR ALARM LOW
PIAHL PRESSURE INDICATOR ALARM HIGH LOW
MAKING CONTACT
DIODE
POWER SUPPLY UNIT
MCCB 1 PHASE
BREAKING
DIMMER
CP
FUSE
BREAKING
DISCONNECTION SWITCH
PUSHBUTTON SWITCH (ALTERNATIVE)
PS
PRESSURE SWITCH
PT
PRESSURE TRANSMITTER
SAH
SALINITY ALARM HIGH
SD
SALINITY DETECTOR
SI
SALINITY INDICATOR
SV
SOLENOID VALVE
TAH
TEMPERATURE ALARM HIGH
TAL
TEMPERATURE ALARM LOW
TI
TEMPERATURE INDICATOR
TIC
TEMPERATURE INDICATING CONTROLLER
TIAH
TEMPERATURE INDICATOR ALARM HIGH
TIAL
TEMPERATURE INDICATOR ALARM LOW
TIAHL TEMPERATURE INDICATOR ALARM HIGH LOW DG
EG
M
GM
J
EMERGENCY GENERATOR
AC INDUCTION MOTOR
SNAP SWITCH
RECEPTACLE
DIESEL GENERATOR
J
NWT JOINT BOX
J
WT JOINT BOX 2 GLANDS (4 GLANDS)
CHANGEOVER SWITCH (CAM SWITCH)
PUSHBUTTON (START/STOP)
INDICATOR LAMP WITH TRANSFORMER
PUSHBUTTON (START/STOP/RUNNING)
GOVERNOR MOTOR
HS
HUMIDISTAT
RL
INDICATOR LAMP
EARTH
WT
WATER TRANSDUCER
D-D
RELAY COIL
AMS
ALARM MONITORING SYSTEM
BZ
BUZZER
SHIELD WIRE
PUSHBUTTON SWITCH (ALTERNATIVE)
EMERGENCY STOP PUSHBUTTON BOX
TS
TEMPERATURE TRANSMITTER
VAH
VISCOSITY ALARM HIGH
VAL
VISCOSITY ALARM LOW
VCA
VACUUM ALARM
VCI
VACUUM INDICATOR
VCT
VACUUM TRANSMITTER
XS
AUXILIARY UNSPECIFIED SWITCH
ZI
POSITION INDICATOR
ZS
LIMIT SWITCH
XXX
LOCALLY MOUNTED INSTRUMENT
XXX XXXX
4
TEMPERATURE SWITCH
TT
REMOTELY MOUNTED INSTRUMENT
Electric symbol List
Machinery Operating Manual
LNGC GRACE ACACIA Abbreviation
BOG
BOIL OFF GAS
DIS
DISCHARGE
FPT
FORWARD PEAK TANK
BOSUN STORE
DISCON
DISCONNECT
FREQ
FREQUENCY
A
AIR
BOSUN ST
ABNOR
ABNORMAL
BRG
BEARING
DK
DECK
F-ST
FOLLOW AUTO START
ABP
AFTER BOTTOM PORT
BW
BILGE WELL
DO
DIESEL OIL
FUNC
FUNCTION
ABSOLUTE
BWC
BRIDGE WING CONSOLE
DP
DIFFERENTIAL PRESS
FUP
FWD UPPER PORT
AFTER BOTTOM STBD
BZ
BUZZER
DRK W
DRINKING WATER
FW
FRESH WATER
AC
ALTERNATING CURRENT
C
CARGO
DRN
DRAIN
FWC
FRESH WATER CONTROL
A/C
AIR CONDITIONER
CAB
CABINET
DRV
DRIVE, DRIVING
FWD
FORWARD
AIR CIRCUIT BREAKER
CAN
CONTROLLER AREA NETWORK
DRY
DRYER
FWE
FINISHED WITH ENGINE
ACC
AUTOMATIC COMBUSTION CONTROL
CCC
CARGO CONTROL ROOM CONSOLE
DSHTR
DESUPERHEATED STEAM HEATER
GACP
GENERATOR AUTO CONTROL PANEL
ACCOM
ACCOMMODATION
CCR
CARGO CONTROL ROOM
DW
DISTILLED WATER
GEN
GENERATOR
ACCU
ACCUMULATOR
CCW
COUNTER-CLOCK WISE
EBU
EMULSION BREAKING UNIT
GMS
GAS MANAGEMENT SYSTEM
ACKNOWLEDGE
CENT
CENTRAL / CENTRIFUGAL
ECC
ENGINE CONTROL ROOM CONSOLE
GMS
GRAPHIC MODELLING SYSTEM
EXHAUST GAS ECONOMIZER
GRAV
GRAVITY
ABS ABS
ACB
ACK ACM
AFTER CENTRAL MIDDLE
CER
CARGO EQUIPMENT ROOM
ECONM
ACT
ACTIVATE
CFW
COOLING FRESH WATER
ECR
ENGINE CONTROL ROOM
GRP
GROUP
ADJ
ADJUSTING
CIRC
CIRCULATING
EDR
ELECTRIC DISTRIBUTING PANEL ROOM
GS
GENERAL SERVICE
CLOSE
EDSHTR
EXTERNAL DESUPERHEATED STEAM
GUI
GRAPHICAL USER INTERFACE
HEATER
GVNOR
GOVERNOR
ADV
ADVANCE
CL
AE
AUXILIARY ENGINE
CLK
CLOCK
.
AFT
AFT
CLR
COOLER
EDUCT
EDUCTOR
GW
GLYCOL WATER
AHD
AHEAD
CMR
CARGO MOTOR ROOM
EER
ELECTRIC EQUIPMENT ROOM
H
HIGH
COMMUNICATION NETWORK
EHQ
EMERGENCY HEADQUARTER
HAND
HANDLE/HANDLING
ELECTRIC
HD
HIGH DUTY
AHU
AIR HANDLING UNIT
CN
AIM
ADVANCED INTEGRATED MULTIFUNCION
CNR
CORNER
ELEC
SYSTEM
C-O
CHANGE-OVER
ELEV
ELEVATOR
HDR
HEADER
ALM
ALARM
CO2
CARBON DIOXIDE
EMCY
EMERGENCY
HFO
HEAVY FUEL OIL
COFFERDAM
EMR
ELECTRIC MOTOR ROOM
HH
HIGH-HIGH
ENGINE
HP
HIGH PRESSURE
ALS
AFTER LOWER STBD
COFF
AMP
AMPERE
COMP
COMPRESSOR
ENG
APT
AFT PEAK TANK
COMP RM
CARGO COMPRESSOR ROOM
EQP
EQUIPMENT
HPT
HIGH PRESSURE TURBINE
AST
ASTERN
COND
CONDENSATE / CONDENSER
ER
ENGINE ROOM
HS
HISTORY STATION
CONDUCTIVITY
ESBD
EMERGENCY SWITCHBOARD
HSC
HIGH SEA CHEST
EMERGENCY SHUT DOWN
HTML
HYPER TEXT MARKUP LANGUAGE
ATOM
ATOMIZING
CONDUCT
AUS
AFTER UPPER STBD
CONT
CONTROL
ESD
AUTO
AUTOMATIC
COOL
COOL, COOLING
ESDS
EMERGENCY SHUT DOWN SYSTEM
HTR
HEATER
AUX
AUXILIARY
COUNT
COUNT, COUNTER
EXH
EXHAUST
HYD
HYDRAULIC
CONTROLLABLE PITCH PROPELLER
EXP
EXPANSION
IAS
INTEGRATED AUTOMATION SYSTEM
EXTENSION
IG
INERT GAS
AVAIL
AVAILABLE
CPP
B
BASE
CSBD
CARGO SWITCHBOARD
EXT
B/ATOM
BURNER ATOMIZING
CSL
CONSOLE
EXTR
EXTRACTOR
IGG
INERT GAS GENERATOR
B/L
BALLAST / LADEN
CSW
COOLING SEA WATER
F
FRESH
IGV
INLET GUIDE VANE
CUSTODY TRANSFER SYSTEM
F/VPR
FORCING VAPORIZER
IN
INLET
FWD CENTRAL LOWER
INCIN
INCINERATOR
B/THR
BOW THRUSTER
CTS
BALL
BALLAST
CUR
CURRENT
FCL
BATT
BATTERY
CW
COOLING WATER
FOSCLE
FORECASTLE
INCOM
INCOMING
BC
BOTTOM CENTRAL
FCU
FWD CENTRAL UPPER
IND
INDICATION
FCV
FLOW CONTROL VALVE
INH
INHIBIT
FDB
FORWARD DEEP BALLAST
INJECT
INJECTION
FDF
FORCED DRAFT FAN
INSPT
INSPECTION
FDWC
FEED WATER CONTROL
INSUL
INSULATION
FE
FLAME EYE
INTERM
INTERMEDIATE
FG
FUEL GAS
INTLK
INTERLOCK
FLP
FWD LOWER PORT
IR
INFRA-RED
FM
FROM
ISO
ISOLATING
FO
FUEL OIL
L
LOW
FORC
FORCING
LAN
LOCAL AREA NETWORK
BGB
BOILER GAUGE BOARD
CW CYL
CLOCK WISE CYLINDER
BH TK
BILGE HOLDING TANK
D
DUMP
BHD
BULKHEAD
DAMP
DAMPER
BLK
BLOCK
BLR
BOILER
DB D/B
DOUBLE BOTTOM DISTRIBUTION BOARD
BLWR
BLOWER
DEARTR
DEAERATOR
BMS
BURNER MANAGEMENT SYSTEM
DEL
DELIVERY
BNR
BURNER
BO BO/WU
BOIL-OFF BOIL-OFF / WARM-UP
DET DG DIFF
DETECTOR / DETECTION DIESEL GENERATOR DIFFERENTIAL
5
Abbreviation
Machinery Operating Manual
LNGC GRACE ACACIA
L/VPR
LNG VAPORIZER
OW SEP
OILY WATER SEPARATOR
SAH
STEAM AIR HEATER
TRBL
TROUBLE
LCD
LIQUID CRYSTAL DISPLAY
PORT
PORT
SAL
SALINITY
TURN GEAR
TURNING GEAR
LCV
LEVEL CONTROL VALVE
P/WAY
PASSAGE WAY
SB
SOOT BLOWER
UMS
UNMANNED MACHINERY SPACE
LD
LOW DUTY
PB
PUSH BUTTON
SBC
SINGLE BOARD COMPUTER
UPP
UPPER
LDO
LIGHT DIESEL OIL
PC
PERSONAL COMPUTER
SC
SEA CHEST
UPS
UNINTERRUPTED POWER SUPPLY
LED
LIGHT EMITTING DIODE
PCU
PROCESS CONTROL UNIT
SCRUB
SCRUBBER
URL
UNIFORM RESOURCE LOCATOR
LIQ
LIQUID
PCV
PRESSURE CONTROL VALVE
SDC
STEAM DUMP CONTROL
UTC
UNIVERSAL TIME CODRDINATE
LL
LOW-LOW
PD
PIPE DUCT
SEC
SECONDARY
V
VOLTAGE
LNG
LIQUEFIED NATURAL GAS
PDU
POWER DISTRIBUTION UNIT
SEL
SELECT
V/F
VOLTAGE/FREQUENCY
LO
LUBRICATION OIL
PID
PROPORTIONAL INTEGRAL DERIVATIVE
SEP
SEPARATOR
VAC
VACUUM
LP
LOW PRESSURE
PIST
PISTON
SEQ
SEQUENCE
VAP
VAPOUR
LPT
LOW PRESS TURBINE
PKG
PACKAGE
SERV
SERVICE
VIB
VIBRATION
LSC
LOW SEA CHEST
PLU
PROCESS MAP LOGICAL UNIT
SETTL
SETTLING
VISC
VISCOSITY
LTG
LIGHTING
PMS
POWER MANAGEMENT SYSTEM
SG
STEERING GEAR
VL
VERY LOW
LVL
LEVEL
PNEUM
PNEUMATIC
SHTR
SUPERHEATED STEAM HEATER
VPR
VAPORIZER
LWR
LOWER
PNL
PANEL
SIN PH
SINGLE PHASE
VRC
VALVE REMOTE CONTROL
M
MACHINERY
POS
POSITION
SOL
SOLENOID
VV
VALVE
M/COND
MAIN CONDENSER
PP
PUMP
SP
SPACE
WBU
WATCH BRIDGE UNIT (Bridge Watch Call panel)
M/LOADER
MANUAL LOADER
PPTW
PUMP TOWER
SPM
SIMRAD POSITION MOORING
WCU
WATCH CABIN UNIT (Cabin Watch Call panel)
M/WHEEL
MAIN WHEEL
PRES
PRESSURE
SPR
SPRAY
WTR
WATER
MAN
MANUAL
PRI
PRIMARY/PRIMING
SPV
SINGLE POINT VIEW
WH
WHEELHOUSE
MANI
MANIFOLD
PROCESS
PROCESS
SS
SUB-SYSTEM (RCA SYSTEM)
WHC
WHEELHOUSE CONSOLE
MANO
MANOEUVRING
PROTECT
PROTECT
SSS
SIMRAD SAFETY SYSTEM
WIND
WINDING
MB
MAIN BOILER
PROV
PROVISION
ST
START
WO
WASTE OIL
MD
MAIN DIESEL GENERATOR
PRP
PROVISION REFRIGERATION PLANT
STT
STERN TUBE
WS
WORKSHOP
MDO
MARINE DIESEL OIL
PS
PROCESS STATION
STBY
STAND BY
WU
WARM UP
MFWPT
MAIN FEED WATER PUMP TURBINE
PSU
POWER SUPPLY UNIT
STC
STEAM TEMPERATURE CONTROL
X
CROSS
MG
MASTER GAS
PU
PROCESS UNIT (RCA SYSTEM)
STM
STEAM
MGPS
MARINE GROWTH PREVENTING SYSTEM
PURGE
PURGE
STOR
STORAGE
MID
MIDDLE
PURIF
PURIFIER
STR
STARTER
MSBD
MAIN SWITCHBOARD
PWR
POWER
STRIP
STRIPPING
MSBR
MAIN SWITCHBOARD ROOM
RCA
REDUNDANCY AND CRITICALITY
SUC
SUCTION
MT
MAIN TURBINE
ASSESSMENT
SUPP
SUPPLY
MTR
MOTOR
RECIRC
RECIRCULATING
SV
SOLENOID VALVE
NDU
NETWORK DISTRIBUTION NETWORK UNIT
REDUC
REDUCTION
SVC
SIMRAD VESSEL CONTROL
MV
MANOEUVRED VALUE
REF
REFRIGERATION TYPE
SVB
SOLENOID VALVE BOX
N2
NITROGEN
REG
REGENERATION TYPE
SW
SEA WATER
NAV
NAVIGATION
REGUL
REGULATOR
SWBD
SWITCHBOARD
NOR
NORMAL
RESV
RESERVOIR
SYNC
SYNCHRONIZE
NZL
NOZZLE
REV
REVERSE
SYS
SYSTEM
O/C
OPEN/CLOSE
RIO
REMOTE IO
TC
TURBOCHARGER, THERMOCOUPLE
O2
OXYGEN
RM
ROOM
TCV
TEMPERATURE CONTROL VALVE
OMD
OIL MIST DETECTOR
RPB
REMOTE PUSH BUTTON
TEMP
TEMPERATURE
OP
OPEN
RPM
REVOLUTIONS PER MINUTE
TG
TURBO GENERATOR
OS
OPERATOR STATION
RTN
RETURN
THR
THRUSTER
OUT
OUTLET
RVI
ROTOR VIBRATION INDICATION
TK
TANK
OVBD
OVERBOARD
S
STARBOARD
TOPP UP
TOPPING UP
OVFL
OVERFLOW
S/D
SCHEMATIC DIAGRAM
TRIP
TRIP
OVLD
OVERLOAD
S/S
SHIP SIDE
TPS
TANK PROTECTION SYSTEM
OVRD
OVERRIDE
S/T
STERN TUBE
TRANS
TRANSMITTER/TRANSFER
6
Abbreviation
LNGC GRACE ACACIA
Machinery Operating Manual
Part 1 : Engineering Data for Main Equipment 1.1 Main Turbine..................................................................................... 1 - 1 1.1.1 Manufacturing Specification................................................... 1 - 5 1.1.2 Main Turbine Operation Instructions...................................... 1 - 7 1.2 Main Boilers.................................................................................... 1 - 10 1.2.1 Main Boilers Planning Data.................................................. 1 - 10 1.2.2 Instructions for Main Boiler Operation................................. 1 - 13 1.3 Generator Turbine ........................................................................... 1 - 19 1.4 Main Feed Water Pump Turbine...................................................... 1 - 25 1.4.1 Operating Procedure ............................................................. 1 - 26 1.5 Diesel Generator Engine ................................................................. 1 - 27 1.6 Fresh Water Generator..................................................................... 1 - 30 1.7 Bow Thruster................................................................................... 1 - 32 Illustrations 1.1a Main Turbine General Arrangement................................................ 1 - 4 1.3.1a Governing System .................................................................... 1 - 20 1.3.1b Control Oil Press. Adjusting Valve ........................................... 1 - 22 1.3.1c Time Schedule for Starting of Turbine Generator ..................... 1 - 23 1.6.1a Fresh Water Generator................................................................ 1 - 29 1.7.1a Bow Thruster Control System .................................................... 1 - 31
Part 1 Engineering Data for Main Equipment Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA Part 1 : Engineering Data for Main Equipment
2. Reduction Gear : One (1) Unit
1.1 Main Turbine
Type : Tandem articulated, double reduction, double helical type
1. Main Particulars :
P.C.D. mm
No. of Teeth
HP
258.3
45
LP
385.1
67
HP
1,698.7
296
LP
1,701.3
296
HP
489.5
53
LP
563.4
61
HP & LP
4,950.8
536
Item 1st red. pinion
1st red. wheel
Type : Mitsubishi cross-compound, impulse, double reduction geared marine turbine Item
NCR
Output
kW
Revolution
MCR
Abt. 26,478
Abt. 29,420
HP Turbine
rpm
Abt. 5,651
Abt. 5,854
LP Turbine
rpm
Abt. 3,298
Abt. 3,416
Propeller
rpm
Abt. 85.0
Abt. 88.0
Steam Pressure at manoeuvring. valve inlet
5.88 MpaG
Steam Temperature at manoeuvring valve inlet
510°C
Exhaust vacuum at the condenser top (when sea water temperature is 27℃)
722 mmHg abt. 10,091kW X 61.6rpm
Limited S.H.P in emergency operation (LP turbine only)
abt. 10,091kW X 61.6rpm
Ahead rotating direction
Clockwise looking from aft
Natural frequency of turbine rotor
1st abt. 29.2 rpm
2nd red. wheel Tooth width
1st red
260 x 2 + 70 (gap)
2nd red
520 x 2 + 80 (gap)
3. Main Condenser : One (1) Unit
Limited S.H.P in emergency operation (HP turbine only)
Critical speed due to shaft torsional vibration
2nd red. pinion
2nd abt. 46.9 rpm
Type
3rd abt. 212.3 rpm
HP Turbine
abt. 4,320 rpm
abt. 48.4 rpm (at propeller)
LP Turbine
abt. 2,280 rpm
abt. 40.5 rpm (at propeller)
Radial flow surface type with dump steam chamber
Vacuum (at cond. Top)
mmHgV
722
Cooling surface
m2
3,490
Quantity of cooling water
m3/h
18,605
Number of cooling tubes
pieces
10,631
Distance between tube sheets
mm
5,500
mm
19.0 / 0.7
Cooling tubes
Dia. / Thickness
Protection system
1- 1
Sacrifice Anode (Soft iron)
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA
8. Control Oil Pump : Two (2) Unit
4. Vacuum Pump : Two (2) Unit Type
NASH AT-1006
Type
Motor driven, horizontal vane type
Number of sets
set
2
Number of sets
set
2
Capacity (dry air removal)
SCFM
7.5
Capacity
m3/h
2.4
Motor output
kW
55
Discharge pressure
MPag
1.5
AC 440V x 3Ф x 60Hz
Pump speed
rpm
1,800
880
Motor output
kW
2.2
Electric source Pump speed
rpm
Electric source
AC 440V x 3Ф x 60Hz
5. Gland Steam Condenser : One (1) Unit Type Number of flows
2 2
Cooling surface
m
Distance between tube sheets
mm
1,896
mm
19 / 1.2
pieces
224
Dia. / Thickness
Size of cooling tube
9. Control Oil Filter : One (1) Unit
Horizontal Surface cooled type
Number of cooling tubes
Type
25
Duplex notch wire type
Number of sets
set
1
Mesh
mesh
200
10. Control Device 6. Gland Exhaust Fan : Two (2) Unit Type
Horizontal Centrifugal Type
Number of sets
set
2
Capacity (at delivery)
m3/min. / mmAg
7 / 300
Fan Speed
rpm
3,500
Motor output
kW
1.5
Electric source
Item
Set of controller
LO temperature controller
Temperature about 44℃
Gland seal steam receiver pressure
Pressure 0.5 ~ 25kPaG
AC 440V x 3Ф x 60Hz
7. Main Lub. Oil Pump (Main Turbine Driven) : One (1) Unit Type
Horizontal gear type driven by second gear
Number of sets
set
1
Capacity
3
m /h
170
Discharge pressure
MPaG
0.294
1- 2
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 11. Alarm Device Item
Detector
Set
L.O .low pressure
Pressure transmitter and alarm setter (PI-308)
Abt. 0.07MPaG
Control oil strainer outlet low press.
Pressure transmitter and alarm setter (PI-312)
Abt. 1.0MPaG
Main condenser low vacuum
Pressure transmitter and alarm setter (PI-341)
Abt. - 0.08MPaG
Gland packing steam
low high
Pressure transmitter and alarm setter (PI-347)
0.0MPaG
Differential pressure transmitter and alarm setter (DPI-313)
Abt. 0.3MPaG
H.P. turbine thrust bearing excess axial displacement
H.P. turbine rotor position indication monitor (AX-521)
Fore & aft side 0.5mm (*1)
L.P. turbine thrust bearing excess axial displacement
H.P. turbine rotor position indication monitor (AX-521)
Fore & aft side 0.5mm (*1)
Turbines vibration (H.P. & L.P. turbine both)
Vibration monitor (VI-522)
75 microns (*1)
Reduction inclination (HP & LP 1st Pinion both)
Inclination monitor (IM-524)
* According to estimated strsss level
Main L.O. inlet high & low temp.
Thermo-resistance bulb (TI-130)
Main condenser level high / low alarm
Level transmitter (LT-515) High
80°C
L.P. 1st pinion bearings
(LP 1st pinion fore bearing TI-117) (LP 1st pinion aft bearing TI-118)
80°C
L.P. 1st wheel upper & aft bearings
(LP 1st wheel upper fore bearing TI-119) (LP 1st wheel upper aft bearing TI-120) (LP 1st wheel lower fore bearing TI-121) (LP 1st wheel lower aft bearing TI-122)
70°C
L.P. 2nd pinion upper & aft bearings
(LP 2nd pinion upper fore bearing TI-123) (LP 2nd pinion upper aft bearing TI-124) (LP 2nd pinion lower for bearing TI-125) (LP 2nd pinion lower aft bearing TI-126)
80°C
2nd wheel bearings
(2nd wheel fore bearing TI-127) (2nd wheel aft bearing TI-128)
60°C
(Main thrust bearing TI-129)
60°C
(Main thrust bearing pad TI-131)
80°C
Thermal-switch (TI-141)
Abt. 518°C
35kPaG
Control oil strainer differential high press
Low
H.P. 2nd pinion upper & aft bearings
(HP 2nd pinion upper fore bearing TI-113) (HP 2nd pinion upper aft bearing TI-114) (HP 2nd pinion lower for bearing TI-115) (HP 2nd pinion lower aft bearing TI-116)
Main thrust bearing
High: 54°C Low: 34°C
Inlet steam temperature
Abt. 250mm above N.W. level with 10 sec. Timer Abt. 300mm above N.W. level with 10 sec. Timer
high
Inlet steam pressure low alarm
Pressure transmitter and alarm setter (PI-321)
LP turbine exhaust chamber high pressure
Sentinel valve (Non – contact alarm)
Abt. 5.2 ± 0.1 MPaG 0.03MPaG
*1) Common use to trip function
Abt. 490℃
Main steam inlet low temp.
Thermo – resistance bulb (TI-141)
Astern steam leak
Thermal – switch (TI-148)
H.P. & L.P. turbine journal and thrust bearings
Thermo-resistance bulb and alarm setter (HP turbine thrust bearing TI-101) (HP turbine fore bearing TI-102) (HP turbine aft bearing TI-103) (HP turbine thrust bearing TI-104) (HP turbine fore bearing TI-105) (HP turbine aft bearing TI-106)
80°C
H.P. 1st pinion bearings
(HP 1st pinion fore bearing TI-107) (HP 1st pinion aft bearing TI-108)
80°C
H.P. 1st wheel upper & aft bearings
(HP 1st wheel upper fore bearing TI-109) (HP 1st wheel upper aft bearing TI-110) (HP 1st wheel lower fore bearing TI-111) (HP 1st wheel lower aft bearing TI-112)
70°C
350℃ with 2 hour timer after ahead operation
1- 3
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 1.1a Main Turbine General Arrangement
Looking From Forward Looking From Starboard
Astern Emergency Operation
Ahead Stop Valve
Ahead Stop Valve Gland Condenser
Main Thrust Bearing
Generator Turbine Exhaust Inlet
Astern Guard Valve
2nd Reduction
Astern Maneuvering Valve
L.P Turbine (Exhaust)
Ahead Emergency Operation
Dump Steam Inlet
Main Condenser
Plan View
Astern Guard Valve Reduction Gear
Main Condenser
Main Thrust Bearing
Astern Maneuvering Valve Astern Emergency Operation
L.P Turbine (Exhaust)
Main LO Pump 2nd Reduction
Gland Condenser
Turning Gear
Control Pump Unit
H.P Turbine Ahead Stop Valve
1- 4
Ahead Emergency Operation
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA
Machinery Operating Manual
1.1.1 Manufacturing Specification
outlet portion of the nozzle are carefully finished and the crosssection of it is determined from the results of various kinds of hydrodynamic tests so as to get the optimum steam flow.
1. General The turbine is the cross-compound, impulse-reaction type, consisting of the high and the low pressure turbines and is designed to assure a high efficiency and reliability. The high pressure is of the impulse single-flow type is which steam enters the turbine through the ahead stop valve connected to H.P. turbine directly, five ahead nozzle valves, five groups of the first stage nozzles, and transfers its energy to the rotating element, i.e. two-rows Curtis stage and seven Rateau stages, and flows to the exhaust chamber in the aft side of the H.P. turbine. It is lead from the exhaust chamber to the low pressure turbine through the cross-under pipe. The low pressure turbine is of the impulse reaction single-flow type in which steam flows toward the forward side, through the steam chest, transfers its energy to four Rateau stages and four stages, and exhausts, into the condenser. The astern turbine is of the impulse type, arranged at the forward end of the low pressure turbine, and steam enters through the astern manoeuvring valve, astern guard valve, and transfers its energy to two-row two Curtis stages, toward the aft side, and exhausts into the condenser. Both the high pressure turbine and the low pressure turbine rotors are connected to the first pinions of the reduction gear by each flexible coupling. 1) Main Turbine (1) Casing The high pressure turbine casing consists of the Cr-Mo steel-casted high pressure section and the steel-casted low pressure section. Each section has the upper and lower casings that are bolted together through the horizontal flange. The steam chest of the nozzle box type is welded to the forward side of the upper casing to reduce the thermal stress. The panting plate is provided in the lower casing so that the turbine casing can expand freely in the forward direction from the aft end fixed. The fixed aft end of the turbine casing is supported in such a manner as to freely expand radically without becoming decentered. The bearing pedestals are fixed to the lower casing at the forward and aft ends of the turbine. Under no circumstance is the rotor and casing decentered. (2) Nozzle The unit type welded nozzle are arranged for the first stage of the high pressure turbine and the astern turbine, while the shrouded type welded nozzles are used for other stages. The throat and the
While the nozzle on the H.P. turbine first stage are divided into five groups, the steam supply to these nozzle groups is controlled by the nozzle valve so that a most economical performance may be obtained over an extensive operating range according to the turbine load. (3) Blade The blades are milled out of the forged, rolled or the die-forged material and their surfaces are finished with the puffed polish. The profile of the blade is made so as to ensure high durability and performance having done regards to the results of various kinds of hydrodynamic tests and to the vibrational stress in the blades, etc. The shroud bands are fitted by calking to the blade tips for guiding the steam flow and preventing the blade vibration. The curtis stage moving blades in the 1st stage of high pressure turbine and astern turbine are provided on the infinite cascade principle, with all the blades connected continuously by means of shrouds, on the basis of two neighboring blades with one shroud, 3600 in the circumferential direction. The blades in the reaction stages of low pressure turbine (5th ~ 8th stages) are provided on the semi-infinite cascade principle with friction damper. The blade fastenings are of X mas-tree, side-entry type in all stages of both H.P. and L.P. turbines. As the steam wetness at the last stage of the low pressure turbine is high, the leading edge of the blade is stellitecoated for preventing damage from drain.
upper and lower halves of the diaphragm are keyed to reduce the steam leakage. The part of the diaphragm where the rotor extends through is provided with the metallic labyrinth packing to minimize the steam leakage from stage to stage along the shaft. The diaphragm packing for both the high and the low pressure turbines, with the nickel-brass fin fitted and calked to the inside of the forged steel packing rings equally divided into some sections are fitted into the packing groove on the diaphragm and are supported by the coil springs. Drain catchers are provided on the low pressure stages where the steam wetness increases, it is sp designed that only drain may be separated and discharged out of the steam passage taking advantage of the centrifugal force of the drain itself in the steam flow. (6) Gland Packing The part of the casing where the rotor extends through is provided with the metallic labyrinth packing to minimize the steam leakage from the casing and the air leakage into the casing. The packing sleeve is of forged steel or cast steel and is separated at the horizontal plane: the packing ring with the nickel-brass fin is fitted into the packing sleeve groove and is supported by the coil spring or spring steel in a concentric alignment with the rotor so as not to receive an impulse from the rotor. The rotor is provided with the multi-row steps corresponding to the fin lengths. Since the packing is supported by the spring, if any contact between the rotor and the fin is occurred, it is allowed that the packing is push away by the spring, thereby it can be escaped outward to prevent an excessive friction and heating.
(4) Rotor (7) Bearing The high pressure turbine rotor is made of the Ni-Cr-Mo-V steel forging and the low pressure turbine rotor of the Cr-Mo steel forging. Wheel discs are machined integral with the shaft. (5) Diaphragm & Internal Packing The diaphragms of the high and the low pressure turbines are divided into the upper and lower halves at the horizontal flanges. They are supported respectively from the upper and lower casings thereby allowing a free expansion of the diaphragm. Furthermore, the diaphragm is so constructed as not to cause any decentering from such a free thermal expansion. The contact surfaces of the
1- 5
Both the high and the low pressure turbines are provided with two journal bearings for each being lubricated by the forced lubrication system. The bearing metal with the cast-in white metal is vertically split at the horizontal plane. The bearing metal is provided with the stopper screw to prevent the bearing from rotating together with the rotation of the turbine rotor and also with the dowel pins for setting the positions of the upper and lower bearing metals longitudinally and athwart.
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA (8) Thrust Bearing The thrust bearing is of Mitchell type, and that for the high pressure turbine is arranged on the forward side while that for the low pressure turbine is provided on the aft side whereby keeping the axial clearance between the rotor and the casing constant. With both of the high and the low pressure turbines, the thrust bearings are vertically halved at the horizontal coupling plane for the facility of assembly and overhaul; the turbine thrust is transmitted to each bronze pad with the cast-in white metal and supported through the pivot & pad stopper. As the pivot position is dislocated a little in the rotating direction from the centerline of each pad, a wedge oil film is easily formed on the sliding surface during the rotation. Between the turbine rotor and socket ring, oil seal rings are furnished to restrict the oil leakage. Upper and lower socket rings are fixed by the pad stopper and furnish the hasp for preventing from rotating with rotor. The adjusting liner is provided for adjustments of the clearances between the thrust collar and the pads and of the axial position of the turbine rotor.
Machinery Operating Manual The reducing gear consist of two first pinions, four first gear wheels, four second pinions and one second gear wheel.
on the upper and the lower bearing metals. (6) Main thrust bearing
(1) Reduction gear casing Reduction gear casing is welded steel plate, which is split into the upper and the lower casing at the horizontal plane including the central axis of the second wheel. The lower casing is of double wall construction of steel plate box type having a sufficient rigidity. The gas escape is furnished at the top of the main wheel cover to exhaust oil vapour and moisture that would otherwise accumulate in the casing whereby preventing the deterioration of lubricating oil. The peephole with covers core provided in adequate positions on the casing for the inspection of the casing inside including the gear teeth and the gear mesh lubrication. (2) First reduction gears
The main thrust bearing of Mitchell type, installed in a separate casing located at the aft end of the reduction gear, transmits the net propeller thrusts to the hull. The Thrust pads have such a sufficient area as to fully stand the propeller thrust, and the lubricating oil thereto is supplied through the branch line from the oil line for main reduction gear. (7) Turning gear The turning gear consists of the electric motor, planetary gear and the bevel gear, and serves to do uniform warming up and cooling down of the turbine rotor respectively at turbine warm-up and after turbine stop through the rotations of the turbine rotor, besides it is also used at the inspection of the tooth surfaces of the reduction gear.
The first pinion are connected through flexible coupling to the high and the low pressure turbine shafts respectively. The first gear wheels are of welded construction, consisting of a rim, spoke, and shaft, connected to the second pinion through the quill shaft and gear coupling. (3) Second reduction gear
(9) Flexible Coupling While both the high and low pressure turbines, the fine teeth type flexible couplings are furnished between the each turbine rotor and the reduction gear first pinion.
The second wheels are of welded construction, consisting of a rim, spoke, and shaft and the aft-end of the shaft is connected to the main thrust shaft. (4) Main reduction gear flexible coupling.
Each flexible coupling sleeve is fitted to the turbine rotor flange and to the first pinion flange by the reamer bolts and these two sleeves are connected to each other by the claw. The engaging parts of the sleeve teeth and of the claw teeth are lubricated by the spray nozzle, and the oil receiver is provided on each sleeve to get the teeth surface sufficiently oil-soaked during the operation. The central parts of top surface of the claw teeth are finished to a spherical surface such as allowing a sound operation even with a certain amount of ill alignment of the turbine rotor with the first pinion. 2) Main Reduction Gear The speed reducing unit between the turbine and the propeller is a double reduction, dual tandem articulated type of reduction gear.
The first gear wheel is connected to the second pinion through the fine teeth type gear flexible coupling. Of each quill shaft extends through the hollow first gear wheel and second pinion, the forward end is connected by the key to the engaging coupling claw and the aft end is done through the flange coupling to the second pinion. Therefore, the turbine revolutions are transmitted to the first gear wheels, and to the quill shaft through the coupling claw and the sleeve, then to the aft-end of the second pinions. The lubricating oil is supplied to the engaging coupling by the exclusive L.O. spray nozzles. (5) Journal bearing Each gear is supported by two journal bearings. Each bearing, of steel shell made through centrifugal casting of white metal, is split at the surface place of horizontal flanges. The lubricating oil to the journal bearings is supplied through the oil passages provided
1- 6
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA 1.1.2 Main Turbine Operation Instructions
Machinery Operating Manual 9) Ensure that oil tank oil level and the overflow of the control oil tank are normal.
1.1.2.1 Preparation for Start-up 1. Starting the condensing system 1) Open the sea water inlet and the outlet valve of the main condenser. 2) Start main circulating pump. 3) Ensure that the condensate level in the condenser is higher than normal. If the level is lower, make-up distilled water is to be supplied. 4) Ensure that the suction valves for two condensate pumps are open. These valves are to be usually kept open except when repairing the pump. When the running pump stops, the other pump will start automatically. 5) Start the main condensate pump with the delivery valve closed, after the pump is started, open the delivery valve gradually. CAUTION After starting the condensate pump, confirm that the level control for main condenser being in good condition. 6) Open the gland leak-off valve between the main turbine and the gland condenser. 2. Starting the Lub. Oil system 1) Check the oil level in the oil tank by means of the oil level indicator and the float gauge. 2) Open the delivery valves of the motor-driven auxiliary lube. oil pumps. (The pumps can be changed over automatically) 3) Open the air valve and close the drain valve of the strainers on the delivery side. 4) Ensure that the inlet and outlet valves of the lube. oil line for lube. oil cooler are open. 5) Close the drain valves and open the air valves of the lube. oil coolers. 6) Set the lube. oil temperature controller to about 44°C. 7) Start the motor-driven auxiliary lube. oil pump. 8) Open the sea water inlet valve and the outlet valve of the lube. oil cooler.
10) Start the control oil pump. 11) Ensure of the overflow of the control oil tank again. CAUTION Check the oil pressure in normal. Normal pressure are 0.1 ~ 0.15MPa For Lubricating Oil 1.4 ~ 1.5MPa For Control Oil. 3. Warming up the Turbine After the condensate system and the lub. oil system are started and in normal condition, the turbines can be started. CAUTION Ensure that the main stop valve, ahead nozzle valves, astern manoeuvring valve, and astern guard valve are closed. 1) Before the turning gear is engaged, the emergency device should be checked. 2) Keep the intermediate stop valve and ahead stop valve between the boiler and the turbine to be closed. Open up the drain valves for the main steam strainer, high pressure steam chest, and turbine casing. These valves are automatically kept open while in manoeuvring mode for removal of water drain. Then, Open up the by-pass valve gradually for the intermediate stop valve so that the pressure in the main steam line can be kept at about 1.0MPaG in pressure and about 320℃ in temperature as a warming up steam near the turbine. CAUTION Ensure that there is no leak from any point of piping. 3) The turning gear is to be engaged (The red lamp lights showing engaged). Start the turning gear and confirm the turbine rotor rotated. 4) Steam is to be supplied to the turbine gland packings and the gland exhaust fan is to be started. Ensure that the packing steam pressure is in normal pressure about 0.01~0.02MPaG CAUTION While the gland packing steam is supplied, the turbine rotor should be turned continuously. 5) Start vacuum pump after confirming the water level of separate tank and water flow of seal water cooler, condenser vacuum is to be raised
1- 7
to the rated level. 6) After the engagement of the turning gear, open the warming up steam valve and the turbine is to be kept running for more than 60 minutes. (This operating time depends on the turbine casing temperature ). While the turning is going on, the main steam pipe is to be warmed up. NOTE The tentatively aimed condition for turbine warming – up before starting the turbine shall be as follows. HP turbine casing in/out : abt. 200~250℃. CAUTION Ensure that turbine rotors are not rotated and cooled down from the present when using the warming – up steam for turbine warming – up. CAUTION After starting the turbine gear, pay attention to lubricating system, steam system and drain lines. 7) Upon completed the turning process to warm up the turbine in accordance with its casing temperature, the warming – up system is to be finished and close the by -pass valves associated with the intermediate stop valves and open the stop valves gradually to the full. CAUTION When the ship is moved by means of a tugboat, the turning gear is to be disengaged. If not, the turning gear will be turned and damaged due to the idling of the propeller. During the period, lube. oil should always be supplied. 1.1.2.2 Start-up 1. Try Engine After the Vacuum in the condenser has reached a required level (approx. 722 mmHg) and the turbine has been turned for more than 60 minutes, the try engine will be carried out in the following manner. 1) When all the preparations for the try engine have been made in the engine room, a message will be sent by telephone to the bridge to that effect. 2) Upon receipt of the message from the engine room, the bridge should check the surroundings of vessel for safety and a “go-ahead” message should be send to the engine room from the bridge. 3) After receipt of the message from the bridge room,, stop the turning motor and disengage the turning gear (a green lamp lights upon the control console signifying the disengaged).
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA 4) Upon confirming that the ahead nozzle valves and astern manoeuvring valve are completely closed, the ahead stop valves will be opened slightly to warm up the entire ahead nozzle box including the valves. 5) Control lever on the control console will be turned to the “ahead” position until the main shaft rotate. CAUTION Pay attention to the tachometer and ahead nozzle valves and manoeuvring valve position indicator. 6) When the tachometer gives the sign of turbine rotation, the control lever will be turned back to the “stop” position.
Machinery Operating Manual 2. Manoeuvring 1) After warming up and trying the engine several times, the speed is to be increased gradually (Within the manoeuvring range, the number of revolutions is automatically adjusted). 2) The speed is to be increased keeping watch over the shaft revolution and the steam pressure. 3) Pay attention to the gland packing steam pressure when the revolution is being changed, though the pressure is to be controlled automatically by gland packing steam controller 3. Open-Sea Operation
7) The control lever will then be turned to the “astern” position in the similar manner as ahead. 8) The “ahead” and “astern” processes will be repeated several times (to promote the warming-up of engine as well as to check for any disorder in the engine room) pay attention to the for friction, etc., between the stationary and the rotating parts by listening for any abnormal noise. 9) Termination of the try engine will be reported to the bridge and the “ahead” stop valve will be fully opened. NOTE The warming up condition for the main steam piping & turbines can be carried out and finished completely during the time schedule control operation until MCR load, using much amount of steam flow. 10) While awaiting an order for sailing, check each equipment again for example. Check easy equipment, such as lubricating system, cooling water system, and other auxiliary machinery be in order or not. 11) If time is abundant before sailing and there is need for preventing thermal deflection of turbine rotor, the “auto-spinning” switch on the control console will be turned on for automatic repetition of the “ahead” and “astern” spinning. Start of the rotor revolution can be recognized by watching the tachometer. CAUTION “AUTO SPINNING” often have an influence of cooling down in main turbine according to the warming-up condition at turbine. CAUTION Do not allow the rotors to remain stationary for longer than three minutes after seal steam has been admitted to the gland packing.
1) The “normal” indicating lamp on the control console lights up after the control lever and ahead nozzle valve lift is beyond predetermined position. The drain valves around the turbine and the astern guard valve are to be closed. 2) Turn the time schedule switch to “ON”. 3) Turn the control lever to the required position. The ahead nozzle valves open automatically little by little according to the time schedule, and the propeller revolution will reach the ordered speed. 4) Pay attention to the turbine vibration while the speed is on the increase. Once there occurs vibration, the turbine revolution is to be reduced slightly to find out the cause for the vibration. If it is judged that the vibration is caused by the rotor deflection, after conticuous running for a short period of time, the speed is to be increased gradually. 5) Ensure by the meters on the supervisory panel that the turbine is running in rated conditions. 6) Pay attention to the lube. oil pressure and the beating temperature at every moment.
steam, it can have the same effect as cooling the turbines of heated up. So pay attention to turbine condition before using auto-spinning device. The turbines must be started very carefully as the condition they were started from cold state. Accordingly, the turbine speed should be increased after spinning the turbines by manual control at 10 ~ 20 rpm several times. Also, the speed should be increased not at once but by stages as far as practicable, watching carefully for abnormal vibration on the vibration monitor. 5. Astern Operation Since a fewer number of stages are used in the astern turbine, the exhaust steam temperature of the turbine is higher than ahead operation. Because of the differences in material thickness and composition between the rotor and casing, the exhaust casing temperature will be lower than the rotor temperature, the rotor and stationary parts will expand differently. Because of this differential expansion, some precautions are required when operating astern. Full power astern operation 1) The engine must not be operated full astern for longer than 120 minutes. 2) After prolonged full power astern running, a rapid increase in ahead load should be avoided. The speed should be increased gradually by using the normal time schedule (approx. 80 minutes) in the remote control program. In no case, except in an extreme emergency, full power ahead should be restored in less than 30 minutes, after full power astern operation. Following chart indicates recommended time schedule for manually increasing speed to full ahead in 30 minutes should this be essential.
Time schedule for manually increasing speed to full ahead (crash stop and full ahead operation) MCR
7) Check the oil supply for the bearings by observing the each sight flow. CAUTION In case of emergency, the time schedule may be by-passed and the turbine speed will be increased by operating the control lever gradually.
AST MCR FULL (RPM)
4. Auto-Spinning and increasing of turbine speed The auto-spinning is not intended for warming the turbine but for preventing the turbine rotor from bending during a prolonged engine shut-down. However, although the auto-spinning is carried out with a little amount of
1- 8
6
15
30
Time (minutes) Remark : 45 rpm or more, it is recommended to use time schedule for increasing speed.
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA
Machinery Operating Manual
6. Securing 1) When finished with the engine, the intermediate stop valve and the ahead stop valve are to be closed, and make sure that ahead nozzle valves, the astern maneuvring and the astern guard valves are tightly closed. 2)
Open all drain valves associated with the turbine. (While in maneuvring mode, the drain valves are automatically kept open).
3) engage the turning gear and start the turning. 4) Switchover will be made from the main generator to the auxiliary generator. 5) Stop the vacuum pump and confirm the vacuum being down in the main condenser. 6) When the condenser vacuum drops to less than 50mmHgV, close the gland seal steam supply valve. CAUTION If the gland seal is stopped while the vacuum level is not low enough, cold air may leak into the turbine through the gland and cause the rotor deflection. 7) Stop the condensate pump. 8) Even after the gland steam is shut off, the main circulating pump is to be kept running until the temperature of the LP turbine exhaust being dropped enough. 9) The turbine is to be kept turning long enough. It should be kept turning for six hours or more. Cooling the turbine is very important for preventing the rotor deflection. Turing is to be continued until the turbine is cooled properly. 10) As soon as the turning is stopped, the turning gear is to be disengaged, and then the lube oil pump is to be stopped. 11) When the ship is at anchor for a long period, the condensate in the condenser is to be removed through the discharge valve to prevent rusting. And to prevent the steam from leaking into the interior of the turbine, the main steam strainer drain valve before the ahead nozzle control valve is to be kept open and the other drain valves is to be kept closed manually with a handle. 12) when the turbine is stopped for a short period of time, continue the turning until the next departure with operating the lube oil pump and maintaining the condenser vacuum at least approximately 700mmHgV. In this case, the turbine may be started immediately for departure according to the turbine casing temperature. 13) When the condensate pump stops, close the valve for condensate recirculating system of the main condenser.
1- 9
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.2 Main Boilers 1.2.1 Main Boilers Planning Data 1. Performance Data Boiler Type
MB-4E-KS
Oil Firing
Gas Firing LOAD
Evaporation
Steam Press
B.MAX
100%NOR
75% NOR
50% NOR
25% NOR
Total
kg/h
70,000
53,000
40,000
27,000
14,000
SH Steam
kg/h
68,000
52,000
39,000
26,000
13,000
DSH Steam
kg/h
2,000
1,000
1,000
1,000
1,000
Drum
MPa
6.8
6.47
6.28
6.14
6.06
LOAD
Air Temp
100% NOR
75% NOR
50% NOR
25% NOR
Total
kg/h
70,000
53,000
40,000
27,000
14,000
SH Steam
kg/h
68,000
52,000
39,000
26,000
13,000
DSH Steam
kg/h
2,000
1,000
1,000
1,000
1,000
Drum
MPa
6.8
6.47
6.28
6.14
6.06
Evaporation
Steam Press
Water & Steam Temperature
B.MAX
SH Oulet
MPa
6.03
6.03
6.03
6.03
6.03
SH Outlet
MPa
6.03
6.03
6.03
6.03
6.03
Eco. Inlet
°C
145.0
145.0
145.0
145.0
145.0
Eco. Inlet
°C
145.0
145.0
145.0
145.0
145.0
SH Inlet
°C
285
282
280
278
277
SH Inlet
°C
285
282
280
278
277
SH Outlet
°C
515
515
507
482
442
SH Outlet
°C
515.0
515.0
515.0
515.0
479
DSH Oulet
°C
293
288
288
288
288
DSH Outlet
°C
293
288
288
288
288
FDF Oulet
°C
38
38
38
38
38
FDF Outlet
°C
38
38
38
38
38
SAH Outlet
°C
120
120
120
120
120
(HHV Base)
%
83.9
84.0
83.9
83.3
81.5
HHV
MJ/kg
55.56
55.56
55.56
55.56
55.56
LHV
MJ/kg
50.09
50.09
50.09
50.09
50.59
Water & Steam Temperature
Air Temp SAH Oulet
°C
120
120
120
120
120
Efficiency
(HHV Base)
%
88.5
88.5
88.3
87.7
85.7
Calorific Value
HHV
MJ/kg
43.04
43.04
43.04
43.04
43.04
Efficiency Calorific Value
LHV
MJ/kg
40.68
40.68
40.68
40.68
40.68
Fuel Oil Consumption
kg/h
5,021
3,808
2,856
1,894
961
Fuel Gas Consumption
kg/h
4,123
3,125
2,358
1,595
812
Excess Air Rate
%
10.0
10.0
12.5
19.2
36.0
Excess Air Rate
%
10.0
10.0
12.5
19.2
36.0
O2 Rate
%
1.9
1.9
2.3
3.4
5.6
O2 Rate
%
1.9
1.9
2.3
3.4
5.6
Combustion Air Flow
kg/h
76,905
58,324
44,735
31,434
18,201
Combustion Air Flow
kg/h
79,062
59,916
46,234
33,133
19,253
Flue Gas Flow
kg/h
81,926
62,132
47,591
33,328
19,162
Flue Gas Flow
kg/h
83,185
63,041
48,591
34,727
20,065
Eco Outlet Gas Temp
°C
174
169
165
161
157
Eco Outlet Gas Temp
°C
178
171
166
161
156
Total Draft Loss
kPa
4.93
2.83
1.66
0.82
0.27
Total Draft Loss
kPa
5.08
2.92
1.73
0.88
0.3
1- 10
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 2. Steam, Air & Electric Consumption Air Consumption (per one boiler) Equipment Name
Supply Air
Consumption
Operating Condition
A.C.C. (Actuator)
0.9MPa
120 Nl/min
Continuous
F.W.R. (Actuator)
0.9MPa
50 Nl/min
Continuous
Boiler Flame Eye Sealing
7.4kPa
150 x 6 = 900 Nl/min
Continuous
Soot Blower Scavenging
5.5kPa
78 x 10 = 780 Nl/min
Continuous
Soot Blower Sealing
5.5kPa
220 x 10 = 2,200 Nl/min
Continuous
Steam Consumption (per one boiler) Equipment Name
Supply Steam
Consumption
Operating Condition
Soot Blower
6.03MPa
110 kg/min/set
Soot Blower Operation (Operate Time : 15 min)
Burner
0.8MPa
180 kg/h
Max. Consumption
Steam Air Heater
0.59MPa
2,992 kg/h
Boiler Maximum
F.O. Heater
1.9MPa
908 kg/H
Boiler Maximum
Electric Consumption (per one ship) Equipment Name
Supply Power
Consumption
Operating Condition
Boiler Control Panel
220V
30 A
Continuous
Forced Draft Fan
440V
300 A
Continuous
Fuel Oil Service Pump
440V
36 A
Continuous
1- 11
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 3. Alarm & Trip List No.
Description
186B
Drum Level Ex High
185B
Drum Level Very High F.W. Motor Valve Close
388B
Set Point
Set Point
Timer
No.
Description
-
-
FO Header Temperature Low
+220 mm
10 sec
234B
FO Header Temperature Low Low
Drum Level Very High Turbine Trip
+220 mm
10 sec
184B
Drum Level High High Turbine Auto Slow Down
+180 mm
10 sec
-
Atomizing Steam Pressure Low
-
Drum Level High
+130 mm
10 sec
243B
Atomizing Steam Pressure Low Low
0.30 MPa
-
-
Drum Level Low
-130 mm
10 sec
389B
Drum Level Low Low Turbine Auto Slow Down
-180 mm
10 sec
205B
Gas Header Pressure High High
75 kPa
-
183B
Drum Level Low Low
-240 mm
-
-
Gas Header Pressure High
70 kPa
4 sec
180B
Drum Level Low Low
-240 mm
-
-
Gas Header Pressure Low
1 kPa
4 sec
205B
Gas Header Pressure Low Low
-
Gas Header Temperature High
80ºC
10 sec
-
Gas Header Temperature Low
10ºC
10 sec
240B
Gas Header Temperature Low Low
-
N2 Pressure Low
0.1 MPa
4 sec
288B
Soot Blower Steam Pressure Low
4.0 MPa
4 sec
276B
Smoke High
5 deg
10 sec
262B
Wind Box Temperature High
200ºC
10 sec
-
F.D. Fan Vibration High
6.0 mm/s
4 sec
-
F.D. Fan Trip
-
Boiler F.O. Heater Outlet Temperature High
145℃
10 sec
-
Boiler F.O. Heater Outlet Temperature Low
95℃
10 sec
-
Eco Outlet Gas Temperature High
200ºC
10 sec
-
Eco Outlet Gas Temperature Low
120ºC
10 sec
Service Pump Outlet Pressure Low Auto Change
1.0 MPa
4 sec
-
Seal Air Fan Outlet Pressure Low Auto Change
4.5 kPa
4 sec
397B
Control Air Press Low Low
0.4 MPa
Alarm
Trip +240 mm
Nor
-
Drum Pressure High
7.55 MPa
4 sec
-
Drum Pressure Low
5.40 MPa
4 sec
-
Feed Water Pressure Low
7.36 MPa
10 sec
-
Superheated Steam Pressure High
6.40 MPa
4 sec
-
Superheated Steam Pressure Low
5.40 MPa
4 sec
126B
Superheated Steam Temperature High High
-
Superheated Steam Temperature High
530ºC
10 sec
-
Superheated Steam Temperature Low
400ºC
10 sec
-
Desuperheated Steam Pressure High
6.40 MPa
4 sec
-
Desuperheated Steam Temperature High
400ºC
10 sec
229B
Flame Failure
229B
Flame Failure
-
F.O. Header Pressure Low
259B
F.O. Header Pressure Low Low
-
F.O. Header Temperature High
545ºC
One of Two Two of Two
0.15 MPa
1 sec 1 sec
4 sec 0.10 MPa
140℃
-
250B
-
10 sec
1- 12
F.O.
Alarm
Trip
90℃
Nor
Timer 10 sec
80℃
0.35 MPa
-
4 sec
0.7 kPa
5ºC
Stop
-
-
-
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.2.2 Instructions for Main Boiler Operation 1.2.2.1 Preparing for Service Prior to starting the boiler, ensure that the following items and pre-operational checks are carried out. 1. Boiler 1) Be sure the fire sides are clean and that the furnace refractory is in good condition. 2) Be certain that no oil nor gas has accumulated in the furnace bottom or in the burner wind box. Wipe up all oil spills and remove any combustible material from burner area. 3) Check the boiler to be sure all repair work has been completed, all tools, etc. have been removed. The handhole fittings and manhole covers properly installed and all access doors and casing panels have been replaced and properly secured. 4) Check the safety valves to see that the gag have been removed, the lifting levers replaced and the easing gear is not fouled. Insure that the hand easing gear and safety valves are free and clear. The hand gear for lifting safety valves should be thoroughly examined and operated so far as this can be done without lifting the safety valves. 5) Check the water level gauge root valves to be sure they are open. 6) Open the air vent valve fitted on the steam drum. 7) Open the starting valve on the superheater outlet line. 8) Open the drain valves of the superheater headers.
(2) If the boiler is empty, then fill until the level is just in sight in the water gauge, feeding through the auxiliary feed line. Then raise to Normal Water Level, feeding through the main feed line. This practice serves to check that both the auxiliary and the main feed lines are ready for service. Use condensate for filling a boiler; preferably from a deaerator in service if possible. 2. Superheater 1) Drain both superheater headers before lighting a fire. Scale in superheater tubes is usually soluble in water. By draining the superheater, such soluble matter which has gone into solution is removed from the tubes. If the water is allowed to remain it will be quickly evaporate and the soluble material re-deposited in the tubes. 2) Open the starting valve on the superheater outlet line. The superheater is protected by the starting valve to permit maintaining a flow of cooling steam to pass through the tubes during lighting off, securing and stand-by periods. The vent must be open while the boiler is being fired and normal steam flow exists. The vent valve must be open any time there is danger of overheating the superheater from the radiant heat of a hot furnace. The valves in the superheater vent line should be wide open until a pressure of at least 0.7MPa has been reached. If a thermometer is fitted in the steam line between the superheater outlet flange and the superheater protection line, a valve in the protection line can be throttled after a pressure of 0.7MPa is reached, providing close watch is maintained ton the steam temperature to prevent it going above the design temperature. 3) The header drain valves should be left cracked open to be sure no condensate collects in the headers. Close the drain valves as soon as the superheater tubes and headers are thoroughly warmed up. At no time should a large volume of steam be permitted to blow from the drains while the boiler is being fired.
9) Open the shut-off valves for the pressure gauges of the boiler, check the pipe lines up to the gauges and made sure that all the valves for the gauges are open.
3. Economiser
10) Check and make sure blow-off valves and water wall header drain valves are closed.
4. Uptakes
11) Bring the water level to about normal level in the steam drum as instructed below and at the same time check the feed water line.
Be sure the economiser is full of water. While filling the boiler with water, open the vent and bleed off all air; close the valve when water appears.
see that the connecting pipe of drip pans is clear. 3) See that the air slide work freely, that the air slide doors are clean and function properly. 4) If the burners are new or if atomizer or housing tube parts have been replaced check the positions of the sprayer plate, this setting is very important (Refer to Section “Oil Burners”). 5) Fuel gas is not used for lighting off. After lighting off, change to gas firing. According to schedule, check entire fuel gas system to be sure everything is in good condition. 6. Steam Air Heater 1) Check the supplying correct steam to steam air heater. 2) Make sure of drain trap operation and avoid water hammer by drain.
1.2.2.2 Starting a Boiler from Dead Ship Conditions (Boiler cold start, in case the other boiler is not used) [Refer to “Boiler Start Up Procedure – 1”] 1) If it is necessary to start a boiler from dead-ship conditions with neither shore power nor shore steam available, diesel oil may be used until steam has been raised enough to heat the bunker fuel. 2) Fill the boiler with deaerated water from a deaerator if at all possible. The feed tanks should be filled with condensate before securing the boilers to provide the water necessary for restarting. It is advisable to fill the boiler 50~80 mm above the normal water level to provide additional storage until the feed pump can be started. 3) Start the emergency diesel generator NOTE Blow out the gas remaining in the furnace using the forced draft fan before lighting up the burner. 4) Prepare the boiler for service as outlined under the normal starting procedure.
Close all access doors that have been removed for repairs or cleaning. Be sure that uptakes are clear for firing and that no one is working in the stack area.
5) Line up the Boiler F.O. serv. pump to take suction from the diesel oil tank and to discharge to the burner manifold.
5. Burners (1) If the boiler is full of water, then drain the boiler water until the water level is at the bottom of the water gauge. Bring the level up about 100 mm, feeding through the auxiliary feed line. Then bring up to Normal Water Level, feeding through the main feed line.
1) Check fuel oil strainers and entire fuel oil system to be sure everything is in good condition.
6) Start pumping diesel oil, bleed off enough through the recirculating line, or through the burner oil lead into a bucket to remove all heavy oil from the piping.
2) Inspect the burner air casing to be certain no oil had dripped to the space around the burners creating a fire hazard. If drip pans are fitted
7) The diesel fuel must be supplied to the burners at the designated oil pressure in order to obtain proper atomization.
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Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA
2. When it takes time to raise the pressure, the starting valve should be operated (throttled) so that the combustion rate will follow the pressure raising curve.
12) After a drum pressure of 0.2MPa has been reached, start warming through the auxiliary steam lines. Line up steam to the settling tank coils. Line up feed pump and have it ready for service when needed. The starting valve must be left open until the boiler has been put on load.
Boiler Start Up Procedure-1 Cold Start (In case the other boiler is not used.)
15) When steam pressure is up to 1.0~1.5MPa, start warming up the feed water pump, main generator and other machinery. 16) After a drum pressure of 1.5MPa has been reached, change atomizing fluid from air to steam. And continue raising pressure at 0.6MPa of fuel oil pressure as outlined under normal condition. 17) Start the feed pump as early as possible. After starting the feed pump, close the starting valve.
5
Drum Pressure (MPaG)
14) Secure the burner. Circulate bunker fuel through the fuel oil heaters and piping until oil at the proper temperature is available in the manifold. Relight the burner, normal conditions, and continue raising pressure under normal conditions.
6
4
3
2
1
18) Start the main generator. 0
19) When the generator is up to speed and capable of carrying a load, switch over to the generator and secure the diesel generator.
0
60
120
[Refer to “ Boiler Start Up Procedure – 1”] 1) Check the water level in the steam drum. When the water level is lined up properly the water level will drop when the drain valve is opened ,then return to its original level when the drain valve is closed. 2) Start the forced draft fan, open the damper and the burner air slide door and ventilate the furnace thoroughly for at least five minutes before lighting up. 3) Operate the steam air heater simultaneously with the forced draft fan. 4) Circulate fuel oil through the fuel oil heater and the burner manifold. A recirculating valve on the manifold and a re-circulating line to the service pump suction is provided for this purpose. By-pass the fuel oil meter until ready to light up.
7) Light up the burner following the instructions outlined in the burner section and burner instruction book. Adjust the fuel oil pressure and forced draft pressure to establish a full steady flame with ignition close to the atomizer. The fuel oil must be completely burned. It is important that no unburned oil is sprayed into the furnace and that no heavy smoke is produced. Frequently observe the smoke indicator and the burner flame, especially after making any changes in firing rate or in forced draft pressure. 8) When steam pressure is up to 0.1MPa, close the drum air vent valve. If a large volume of steam is issuing from the vent, crack open the superheater header and the control desuperheater drain valve. The superheater outlet starting valve must be left open until the boiler is put on line.
180
Operating Time After Light Off (minute)
1- 14
1.2.2.3 Lighting Up and Raising Pressure
6) Reduce the forced draft pressure at the burners to 10~20 mmAq. Close the re-circulating valve and check that the correct fuel oil pressure is available in the burner manifold. Start the mai n generator
13) As soon as the fuel oil in the settling tank is warm enough to pump, prepare to change from diesel fuel to bunker fuel. Line up steam on the fuel oil heaters.
NOTE Combustion rate should be used as a guide for start-up and should be controlled appropriately so as to follow the pressure raising curve
5) When the fuel oil in the burner manifold is at the correct temperature, insert an atomizer assembled with a lighting-up sprayer plate in the burner. Close the air registers of the other burners.
7
Change fuel oil from diesel to "C" oil and raise FO press.0.6MPaG Start the feed water pump turbine and close the starting valve.
11) if completely drain, close the superheater header drain valves, starting valve outlet drain valves and control desuperheater drain valves.
Supply steam to fuel oil heater.
10) When steam pressure is up to 0.1MPa, close the drum air vent valve. In case the steam severely spurt, crack open the superheater header and control desuperheater drain valve. The superheater outlet header vent valve must be left open until the boiler is put on line.
22) Set up the burners with the proper spray plates for the service required, lighting up as necessary. NOTE 1. Combustion rate should be used as a guide for start-up and should be controlled appropriately so as to follow the pressure raising curve. To prevent damage to superheater tubes, combustion rate should not be increased excessively.
If completely drain, close the starting drain valve, superheater header drain valve and control desuperheater drain valve.
9) Lighting up a burner, using a normal atomizer tip with air atomizing driving the forced draft fan in low speed. Fuel oil pressure is 0.4MPa (Combustion rate is 280 kg/h).
21) When the steam pressure is about 0.3~0.4MPa below normal operating pressure, check the safety valves with the easing gear. Lift the disc well off the seat to give a strong blow and release the lifting lever quickly to reseat the valves sharply.
Close drum air vent valve. In case the steam severely spurt, crack open the superheater header and control desuperheater drai n valve.
(1) Drum air vent valve (2) Superheater header drain valves (3) Starting valves (4) Starting valve outlet drain valves (5) Control desuperheater drain valves (6) Steam temperature control valve
20) Drain and warm through connecting piping to the main and auxiliary steam lines. It is essential that the connecting steam piping is clear of all water and warmed up to approximately operating temperature before putting the boiler on load.
Open drum air vent, superheater header drain valve, starting valve and its drain Open control desuperheater drain valve and steam temperature control valve. Use normal atomiser at pressure of 0.5Mpag. Use diesel oil and air atomising .
8) Open the following valves before lighting up.
240
9) Take plenty of time bringing the boiler to working pressure to avoid overheating the superheater elements or damaging the brickwork. Firing rate should be less than 280 kg/h until a pressure of 0.5MPa has
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA been reached. Then fire the boiler at a rate that will raise the steam pressure according to the pressure raising curve. It takes at least 2~3 hours to raise steam pressure to about 0.5MPa. Do not raise steam pressure too quickly. Turn the burner on and off as necessary. 10) Close the valve on the steam pressure gauge and bleed the steam gauge line to be sure it is clear. Allow the line to cool for a few minutes before opening the pressure gauge valve. See that the gauge responds immediately as the valve is opened. 11) Check the water level again by opening the water gauge drain, nothing if the level drops immediately when the drain valve is opened and returns to the original level as the valve is closed. 12) Drain and warm through connecting piping to the main and auxiliary steam lines. It is essential that the connecting steam piping is clear of all water and warmed up to approximately operating temperature before putting the boiler on load. 13) When the steam pressure is about 0.3~0.4MPa below normal operating pressure, check the safety valves with the easing gear. Lift the disc well off the seat to give a strong blow and release the lifting lever quickly to reseat the valves sharply. 14) Since the economiser is installed it may be found that steam will form in the tubes causing a water hammer. In this case run in enough feed water to lower the economiser temperature. Blow down the boiler if necessary to keep the water level in sight in the gauges. Never open water wall header drain valves unless the burners are secured. 15) When the boiler pressure reaches operating pressure, open the valves and put the boiler on load. Close the superheater outlet starting valve. Make sure all other drain valves, vent valves and bypass valves are closed. At this point carefully observe the water level in the boiler. If automatic water regulation needs to be used, make sure regulators are working properly.
the proper temperature is available in the manifold. 4) Open the following valves before lighting up. (1) (2) (3) (4) (5) (6)
Drum air vent valve Superheater header drain valves Starting valves Starting valve outlet drain valves Control desuperheater drain valves Steam temperature control valve
5) Light up the burner with 0.4MPa of fuel oil pressure (Combustion rate is 280 kg/h). 6) When steam pressure is up to 0.1MPa, close drum air vent valve. If a large volume of steam is issuing from the vent, crack open the superheater header and control desuperheater drain valve. The superheater outlet header vent valve must be left open until the boiler is put on line.
2. When it takes time to raise the pressure, the starting valve should be operated (throttled) so that the combustion rate will follow the pressure raising curve. 3. With two-boiler operation, make sure the starting valve is kept open until the boiler under pressure raising takes on the load. Boiler Hot Start (In case the other boiler is not used.) [Refer to “Boiler Start Up Procedure – 3”] 1) Check the water level in the steam drum. When the water level gauge is lined up properly the water level will drop when the drain valve is opened. The water level should return to its original level when the drain valve is closed.
7) If completely drained, close the superheater header drain valves, starting valve outlet drain valves and control desuperheater drain valves.
2) Start the forced draft fan, open the damper and the burner air slide door and ventilate the furnace thoroughly for at least one minute before lighting up.
8) Raise steam pressure in accordance with the pressure raising curve.
3) Operate the steam air heater simultaneously with the forced draft fan.
9) Drain and warm through connecting pipes to the main and auxiliary steam lines. It is essential that the connecting steam piping is clear of all water and warmed up to approximately operating temperature before putting the boiler on load.
4) Circulate fuel oil through the fuel oil heaters and the burner manifold. A re-circulating valve on the manifold and a re-circulating line to the service pump suction is provided for this purpose. Bypass the fuel oil meter until ready to light up.
10) When the steam pressure is about 0.3~0.4MPa below normal operating pressure, check the safety valves with the easing gear. Lift the disc well off the seat to give a strong blow and release the lifting lever quickly to reseat the valves sharply.
5) When the fuel oil in the burner manifold is at the correct temperature, insert an atomizer with a light-up sprayer plate in the burner. Close the air registers of the other burners.
Boiler Cold Start (In case the other boiler is in normal use.) [Refer to “Boiler Start Up Procedure – 2”]
2) When the boiler pressure reaches operating pressure, open the valves putting the boiler on load. Close superheater outlet starting valve. Make sure all other drain valves, vent valves and bypass valves are closed. At this point carefully observe the water level in the boiler. If automatic water regulation needs to be used, then make sure regulators are working properly.
1) Prepare the boiler for service as outlined under the normal starting procedure.
3) Set up the burners with the proper sprayer plates for the service required, lighting up as necessary.
16) Set up the burners with the proper sprayer plates for the service required, lighting up as necessary.
NOTE 1. Combustion rate should be used as a guide for start-up and should be controlled appropriately so as to follow the pressure raising curve. To prevent damage to superheater tubes, combustion rate should not be increased excessively.
6) Reduce the forced draft pressure at the burners to 10~20 mmAq. Close the re-circulating valve and check that the proper fuel oil pressure is available in the burner manifold. 7) Set the following valves before lighting up. (1) Air vent valve fitted on the steam drum : Full close (2) Drain valves of the superheater headers, drain valves on the starting valve outlet, drain valves of control desuperheater, steam temperature control valve : Full open (3) Starting valves on the superheater outlet : Half open
2) Start the forced draft fan and ventilate the furnace thoroughly before lighting up.
8) Supply steam to fuel oil heater.
3) Circulate bunker fuel through the fuel oil heaters and pipes until oil at
9) Light up the burner following the instructions outlined in the burner section and burner instruction book. Adjust the fuel oil pressure and
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Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA forced draft pressure to establish a full steady flame with ignition close to the atomizer. The fuel oil must be completely burned. It is important that no unburned oil is sprayed into the furnace and no heavy smoke is produced. Frequently observe the smoke indicator and the burner flame, especially after making any change in firing rate or in forced draft pressure. 10) Line up desuperheated steam to the machinery. The starting valve must be left open until the superheater is stabilised. 11) Take plenty of time bringing the boiler to working pressure to avoid overheating the superheater elements or damaging the brickwork. Firing rate should be less than 280 kg/h. 12) Steam pressure shall be raised in accordance with the pressure raising curve. 13) If completely drained, then close the superheater header drain valves, starting valve outlet drain valves and control desuperheater drain valves. 14) Close the valve on the steam pressure gauge and bleed the steam gauge line to make sure it is clear. Allow the line to cool for a few minutes before opening the pressure gauge valve. See that the gauge responds immediately as the valve is opened. 15) Check the water level again by opening the water gauge drain; the water level drops immediately when the drain valve is opened and should return to the original level as the valve is closed.
Machinery Operating Manual Boiler Hot Start (In case the other boiler is normal used.) [Refer to “Boiler Start Up Procedure – 4”] 1) Start the forced draft fan and ventilate the furnace thoroughly before lighting up. 2) Circulate bunker fuel through the fuel oil heaters and pipes until oil at the proper temperature is available in the manifold. 3) Open the following valves before lighting up. (1) Air vent valve fitted on the steam drum : Full close (2) Drain valves of the superheater headers, drain valves on the starting valve outlet, drain valves of control desuperheater, steam temperature control valve : Full open (3) Starting valves on the superheater outlet : Half open
2. When it takes time to raise the pressure; the starting valve should be operated (throttled) so that the combustion rate will follow the pressure raising curve 3. At two-boiler operation, make sure the starting valve is kept open until the boiler under pressure raising takes on the load.
5) Line up desuperheated steam to the each machinery. The starting valve must be left open until stable steam conditions occur in the superheater. 6) Take plenty of time bringing the boiler to working pressure to avoid overheating the superheater elements or damaging the brickwork. Firing rate should be less than 280 kg/h.
17) Start the feed pump as early as possible. After starting the feed pump, close the starting valve.
7) Close the superheater header drain valves, starting valve outlet drain valves and control desuperheater drain valves.
18) After a steam pressure of 0.2MPa has been reached, start the main generator.
8) Steam pressure should then be raised in accordance with the pressure raising curve.
2. When it takes time to raise the pressure; the starting valve should be operated (throttled) so that the combustion rate will follow the pressure raising curve
NOTE 1. Combustion rate should be used as a guide for start-up and should be controlled appropriately to follow the pressure raising curve. To prevent damage to superheater tubes, combustion rate should not be increased excessively.
4) Light up the burner following the instructions outlined in the burner section and burner instructional book. Adjust the fuel oil pressure and forced draft pressure to establish a full steady flame with ignition close to the atomizer. The fuel oil must be completely burned. It is important that no unburned oil is sprayed into the furnace and no heavy smoke is produced. Frequently observe the smoke indicator and the burner flame, especially after making any change in firing rate or in forced draft pressure.
16) When the drum pressure is up to 1.5MPa, change atomizing medium from air to steam. Raise the fuel oil pressure to 0.6MPa.
NOTE 1. Combustion rate should be used as a guide for start-up and should be controlled appropriately to follow the pressure raising curve. To prevent any damage to the superheater tubes, combustion rate should not be increased excessively.
11) Set up the burners with the proper sprayer plates for the service required, lighting up as necessary.
9) When the steam pressure is about 0.3~0.4MPa below normal operating pressure, check the safety valves with the easing gear. Lift the disc well off the seat to give a strong blow and release the lifting lever quickly to reseat the valves sharply. 10) When the boiler pressure reaches operating pressure, open the valves putting the boiler on load. Close superheater outlet starting valve. Make sure all other drain valves, vent valves and bypass valves are closed. At this point carefully observe the water level in the boiler. If automatic water regulation needs to be used, make sure regulators are working properly.
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Part 1 Engineering Data for Main Equipment
Drum Pressure (MPaG) 5
4
3
2
1
0 0 60
Drum Pressure (MPaG)
If completely drain, close the starting drain valve, superheater header drain valve and control desuperheater drain valve.
Close drum air vent valve. In case the steam severely spurt, crack open the superheater header and control desuperheater drain valve.
Open drum air vent, superheater header drain valve, starting valve and its drain. Open control desuperheater drain valve and steam temperature control valve. Use normal atomiser at pressure of0.35Mpag. Use diesel oil and air atomising
7
7
6
6
5
120
Operating Time After Light Off (minute) 180 240
4
3
2
0 0
Drum Pressure (MPaG)
Raise fuel oil pressure 0.6MPaG. Start the feed water pump turbine and close the starting valve.
Close drum air vent. Open superheater header drain valve, starting valve and its drain valve, control desuperheater drain valve and steam temperature control valve. Supply steam to fuel oil heater. Light off the burner using normal atomizer at pressure of 0.35MPaG. Use "C" heavy oil. If completely draining, close the starting drain valve, superheater header drain valve.
2. At two boiler operation, make sure to keep the starting valve open until the boiler under pressure raising takes on load.
60
50
Start the main generator.
1
30 60
Operating Time After Light Off (minute)
1- 17
90 120
40
30
20
0
Close drum air vent. Open superheater header drain valve, starting valve and its drain valve, control desuperheater drain valve and steam temperature control valve. Light off the burner using normal atomizer at pressure of 0.6MPaG. Use "C" heavy oil. If completely draining, close the starting drain valve, superheater header drain valve and control desuperheater drain valve.
LNGC GRACE ACACIA
Machinery Operating Manual
Boiler Start Up Procedure-2 Cold Start (In case the other boiler is normal used.) Boiler Start Up Procedure-3 Hot Start (In case the other boiler is not used.) Boiler Start Up Procedure-4 Hot Start (In case the other boiler is normal used.)
NOTE 1. Combustion rate should be used as a guide for start-up and should be controlled appropriately to follow the pressure raising curve. NOTE Combustion rate should be used as a guide for start-up and should be controlled appropriately to follow the pressure raising curve. NOTE 1. Combustion rate should be used as a guide for start-up and should be controlled appropriately to follow the pressure raising curve.
2. At two boiler operation, make sure to keep the starting valve open until the boiler under pressure raising takes on load.
70
10
0 30 60 90 120
Operating Time After Light Off (minute)
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.2.2.4 Securing a Boiler 1) Operate the soot blowers under optimal conditions. It is recommended that soot blowers are used before boiler load drops to 50%. 2) Secure the burners one at a time. 3) Keep the forced draft fan running a few moment after securing burners, maintaining a forced draft pressure of at least 25 mmAq until all combustible vapour has been cleared from the furnace. Then close all air registers, secure the fan and close the forced draft fan vane. 4) When the boiler is in stand-by condition, light-up a burner occasionally to hold the steam pressure within 0.4~0.5MPa below normal operating pressure. Always remember to open the starting valve before lighting up a burner. 5) When the boiler is to be cooled. (1) Before securing the feed stops, raise the water level 70~120 mm above normal as the boiler cools. Keep the water level at about 50mm above the lower end of the water gauge. (2) Secure the main, auxiliary and superheater outlet stop valves as soon as the boiler stops steaming. (3) Before securing the steam stop valves, open the superheater vent valve, throttling it to avoid dropping the pressure too rapidly. (4) When the steam pressure has dropped to 0.1MPa, open the drains on the superheater headers. Also open the desuperheater drain. (5) When the steam pressure is down to atmospheric, open the steam drum vent. (6) Four hours after the burners are secured, the forced draft fan can be restarted, if necessary, to assist in cooling the unit. Avoid draining and refilling with cold water to cool the boiler. 1.2.2.5 Method for Putting Another Boiler in service In addition to a thorough knowledge of the boiler structure and piping systems, close attention and good judgment are required for the safe operation of the boilers. Careless handling of valves can lead to serious accident or cause damage to valves, piping, machinery etc. If piping systems are improperly drained, further damage can occur. The boilers should be operated in strict compliance with the instructions. 1) When a boiler (No.1 boiler) is steaming and the other (No.2 boiler) is to be put in service, slowly bring the steam pressure in No.2 boiler up to the pressure in No.1 boiler. At the same time warm through the piping on No.2 boiler. Assume that the valve E is fully opened, a generator is running and that desuperheated steam is to be supplied through the valve N. 2) Fire No.2 boiler and raise the pressure gradually in accordance with
the procedure described in “Raising Pressure” while warming through the pipes. This is necessary in combined operation to send the steam. This warming up should be done 30 minutes before putting the boiler on line to enable sufficient time for drainage. 3) Keep the water level normal after lighting up. When water level rises as pressure rises, blow down the boiler as necessary. The feed water system should be lined up for use and combustion control should be manually controlled. 4) When the steam in No.2 boiler is nearly the same pressure as that in No.1 boiler, open the inlet and outlet drain valves of the superheater header and thoroughly drain the header.
the lights becomes dark due to decreased revolution, strange sound takes place in the turbine due to vibration, etc. when these matters are observed, close the operating valve as soon as possible. Also, pay attention the water level rise due to the increase of steam flow from the steam drum at line connecting. 8) In principle all valves of the boilers in service should be fully open or fully closed. Partial opening or closing of the valves will cause and unbalanced rate between the two boilers, and may result in trouble, after the two boilers are cut-in on the line, check to see that both are in the same operating condition. If any deficiency is noted, take prompt remedial action. Carefully check to ensure all vent and drain valves are tightly closed and not leaking. This has direct influence on the fuel oil consumption.
5) Open up the desuperheated steam line (auxiliary steam line) as follows and inform the operators of the auxiliary machinery for which auxiliary steam is being supplied, to open the drain valves on the steam pipe of each machine. Then gradually equalize the steam pressure of both boilers.
S
Crack open the non-return valve L. Open the drain valve W and drain thoroughly the desuperheater. Close the non-return valve L. Slightly open the valve N. Drain the desuperheater outlet line completely. Slowly open the valve N after the non-return valve L is Slightly opened again. (7) Slowly open the non-return valve L. (8) Tightly close the drain valve W.
U
(1) (2) (3) (4) (5) (6)
Now that the desuperheated steam line (auxiliary steam line) has been fully opened, close the starting valve U tightly.
Steam Drum
L No.1 Boiler (PORT) In & Out Header
C
Intermediate Header Water Drum
D N
To Generator Turbine
To Main Turbine
NOTE The starting valve should be opened until the boiler is placed on line.
E
X
B
W
To Desuperheated Steam Line
To B.F.P.T.
Water Drum
6) Connect the main steam line as follows. and inform the operators of the generator to open the drain valve before the generator inlet steam valve. (1) Open the drain valve X. (2) Slightly open the non-return valve C and drain the steam line completely. (3) Slowly open the non-return valve C. (4) Close the drain valve X.
Intermediate Header
In & Out Header
No.2 Boiler (STBD) Key Superheated Steam Line Desuperheated Steam Line
Steam Drum
Drain Line
Special attention should be paid on the opening of the valve “E” and “D”, for example, if the staying condensate in the pipeline is supplied with steam to the generator turbine, the steam temperature goes down,
1- 18
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.3 Generator Turbine
2. Alarm and Trip List
1. Technical Data Item
1) Turbine Type:
SHINKO RG92-2 Multi-stage, Impulse type with Reduction gear Number of units: 2 sets Rate output (Electrical Load): 3,850 kW Turbine rated speed: 8,145 rpm Generator rated speed: 1,800 rpm Rotation (Viewed from turbine): Clockwise Main steam condition: 5.88MPa (60kg/cm2) at 510°C Turbine exhaust Steam: -94.7kPaG (710 mmHg)
Dimension
Normal
ELECTRIC OVER SPEED
r/min(rpm)
1,800
Number of teeth: Revolutions per minute: Reduction ratio: 3) Lube oil LO tank cap.: Governor: Gear coupling: 4) Governing System Governor type: Governing valve type: Hydraulic amplifier type: Servo cylinder: Operating oil supply press.:
5 20° 14° Pinion Wheel Pinion Wheel Pinion Wheel 4.525
206.123 mm 932.705 mm 40 181 8,145 rpm 1,800 rpm
2,400 litre 2.0 litre 1.5 litre
WOODWARD UG-10D Bar lift with twin stem and three valves Mechanically controlled Piston dia. 200mm Max. stroke 80mm Normal 0.64~0.83MPaG Starting abt. 0.2MPaG
-
MECHANICAL
2,000±20 - 40±5.33
VAC. HIGH EXH.PRESS
Trip 1,980±20
kPaG
-
ATM 2) Reduction Gear Module: Pressure angle: Helical angle: Pitch circle diameters:
Alarm
100±10 70±10
SENTINEL VALVE
kPaG
-
Valve set value 70±10
-
LUB.OIL PRESS.
kPaG
100~150
60(+0 -10)
50(+0 -10)
LO SUPPLY TEMPERATURE
℃
35~48
53±3
-
BEARING TEMPERATURE
℃
46~77
75(+3 -0)
-
TURBINE ROTOR AXIAL MOVEMENT
mm
-
0.5±0.1
0.7±0.1
TURBINE ROTOR VIBRATION
µm p-p
-
80±10
140±15
LOW LO TANK LEVEL
mm
Normal level
Normal level -60 ±10
SEALING STEAM PRESSURE
kPaG
1~20
Low (0 ~ -13.3)
PRIMING LO PUMP START & STOP
kPaG
START 40(+0 -10)
STOP 100 ~ 150(+0 -10)
TURNING LO PRESS. INTERLOCK(at T/G STOP)
kPaGr
20~90
20±5 *
INLET STEAM PRESS
MPaG
-
5.4
* This signal is used for interlocking condition of turning, not for alarm
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Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA 3. Construction 1) Turbine (1) Casing The casing consists of the upper casing and the lower casing combined together firmly by bolts on the horizontal flange. The steam chest is casted with the high pressure side of the upper casing and provided with the main trip valve and governing valve. The governor side of the lower casing is bolted to the vertical joint face of the turbine bearing pedestal, which is supported by the flexible plates. (2) Nozzle and Diaphragm The first stage nozzle of the turbine is secured to the upper casing by the bolts, and the part of nozzle plate periphery is fitted in the casing. The 2nd stage ~ 6th stage have nozzles welded to the diaphragms and the 7th stage ~ 9th stage have nozzles cast in the diaphragms. The upper half of diaphragms are fitted to the upper casing on the horizontal plane by set screws, so they can be lifted with the upper casing for overhauling. (3) Diaphragm Packing The 2nd ~ 9th stage diaphragm packing are solid and spring back type and the packing of each stage are divided into four segments on which the springs are provided. (4) Gland Packing Gland Packings are solid and spring back type and they are fitted in groove of packing cases, and supported on the horizontal joint. The Packing cases are separative upper and lower. The packing cases are bolted at the horizontal joint by bolts and the lower halves of cases are fitted to the turbine casing by set screws on the turbine horizontal joint. The packings are divided into four segments on which the springs are provided. (5) Radial Bearing Turbine bearing is of plane type, which has good stability for high speed revolution. Turbine bearing has lubrication from the holes on top and both sides of the horizontal connection, and the lubricating oil discharges from the both sides.
Machinery Operating Manual (6) Thrust Bearing
The output spindle of the speed governor is connected, via linkage, with the hydraulic servomotor, the output spindle of which makes a stroke in accordance with the magnitude of speed governor output.
The thrust bearing for turbine rotor is fitted at the front bearing pedestal and tilting pad type thrust bearing is adopted. The thrust bearing face is divided by many separate fan-shaped thrust pads, each of which is inclined by fulcrum and thus wedgelike oil film is formed and thrust load is taken by this film Each pad is made of steel and lined with white metal 1mm in thickness..
(2) Governing Valve The governing valve is of the bar lift type having 3valves and controlled by the governor through the connecting rod and the lever. The valve stem is connected with the lever at the top end and also is connected with the valve beam. The valve lift is regulated by the hydraulic servo piston through the connecting rod lever valve stem and valve beam to control the steam quantity in order to keep the turbine revolution constant.
(7) Rotor The turbine rotor is solid of the discs and shaft. The governor side of the rotor is provided with the worm and worm wheel for driving the governor, the overspeed trip device. The rotor is connected to the pinion shaft by the Bendix type flexible coupling. The critical speed of the rotor is about 1050rpm at the generator shaft. So take care never to stay near the critical speed during the starting of the turbine
Illustration 1.3.1a Governing system Main Steam Inlet Main Stop Valve Limit Switch for ESV Close (ACB Trip)
SHUT OPEN
(8) Blade Governor Valver
The blades are installed in T groove, which are groove on peripheries of rotor discs and fixed firmly by the stopper blades and liners that are secured carefully after installation. The shroud rings are provided around the periphery of the blades of 1st ~ 8th stages.
Trip Cylinder
The quantity of steam is controlled by the governor valve so as to maintain turbine speed at constant value through the hydraulic servo motor and lever mechanism.
UG10D Woodward Governor
Limit Switch for GOV. Valve Full Open Hydraulic Servo Motor
Limit Switch for Overspeed Indication
Reset Knob
To L.O. Tank
The governor is o f the hydraulic type and the system consists of the woodward UG-10DM speed governor, the hydraulic servomotor, and the governing valve. The governor detects the fluctuation of the turbine revolution and functions to keep the turbine revolution constant by adjusting the steam quantity by means of the governing valve through the lever mechanism and the hydraulic servomotor.
M
To Nozzle
Trip Lever
Solenoid Valve
2) Governing System
Starting Lever
Orifice
Control oil Strainer
To L.O. Tank Press. Adjust. Valve For Lub. Oil
To Bearings Press. Adjusting Valve For Control Oil
Check Valve Main L.O. Pump
To L.O. Tank Duplex L.O. Stariner
Priming L.O. Pump
Check M Valve
(1) Speed Governor UG-10DM type woodward governor is adopted which is provided with standard mechanisms of speed synchronization, speed droop and load limit. This speed governor is installed on the top of bearing box in front of the turbine.
1- 20
Cooling Water
L.O. Cooler
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA 3)
Emergency Trip System The over speed trip, the low lub.oil pressure trip, the low vacuum trip and turbine rotor excessive vibration trip devices are furnished on this turbine. In the emergency cases such as the turbine runs overspeed, the lub.oil pressure drops, the vacuum lowers, the rotor vibrates excessively each trip device functions to close the main trip valve and governing valve to stop the turbine. (1) Main Trip Valve The main trip valve is fitted horizontally on the turbine steam chest and steam is led into the turbine through the valve. The valve is composed of the main and sub. valves so as to have less lifting force in the valve, and sub. valve is made in one unit with the valve stem. (2) Emergency Trip Device a) Low lub.oil pressure trip and low exhaust vacuum trip devices. The low oil pressure trip and the low exhaust vacuum trip equipment consists of a respective pressure switch to detect the oil pressure from the bearing oil system and turbine exhaust vacuum and the solenoid valve in the main trip valve oil line. Under normal running as long as the bearing oil pressure remains normal and steam vacuum in turbine exhaust chamber is normal, the solenoid valve stays closed, but it opens to function through the pressure switch as soon as the oil pressure drops or the turbine exhaust vacuum downs. b) Mechanical Overspeed Trip When turbine revolutions exceed the rated value for some reason and reach 110 ±1% of the rated revolutions, this device provided at the end of the turbine shaft actuates to stop the turbine. When turbine speed reaches 110±1% of the rated speed the eccentric force of the trip spindle overcomes the compressive force of the sprig and the trip spindle comes out and hits one end of the trip lever. c) Electric Overspeed trip When the turbine speed increases excessively, speed monitor detect it an trip solenoid valve is activated by its signal.
Machinery Operating Manual Accordingly control oil pressure is lost then turbine stops by means of shut the main stop valve. (3) Sentinel Valve This valve is fitted to the turbine casing and serves to issue alarm by detecting abnormal rise in the exhaust pressure.
Though it is constructed that the emergency stop valve is closed by the limit switch when the turning clutch is engaged, the clutch automatically moves to a direction of “DISENGAGED” when the motor is rotated by the turbine rotor with some trouble. 5) Lubricating System
The reduction gear is of the single reduction single helical type. The pinion and the gear wheel shaft are connected to the turbine rotor and the generator rotor by means of the flexible coupling. On the turbine side of the gear wheel shaft, the main oil pump is fitted.
The generator turbine is equipped with a lubricating oil system. The oil piping arrangement is made up of a high pressure line for the control oil and of a low pressure line for the bearing and the reduction gear lubrication. Oil is sucked from the oil tank in the common bed and pressurized by the main oil pump and adjusted its pressure by the oil pressure adjusting valve and supplied to the high pressure line for the control oil and of the low pressure line for the lubrication.
(1) Gear Casing
(1) Main Oil Pump
4) Reduction Gear
The gear casing is composed of the upper casing, and lower casing. The turbine side of the lower casing is combined with the turbine lower casing on the vertical surface flange as mentioned before. The lower casing is opened to the oil tank, which is a part of the common bedplate.
The main oil pump is of the gear type. The pump is driven by the turbine reduction gear wheel shaft through the gear. A valve serving as the safety valve is fitted on the pump casing. The valve is composed of the spindle and spring, and regulates the pump delivery pressure directly.
(2) Bearing (2) Priming Oil Pump The pinion bearing of turbine and generator sides are ordinary plane type and have two oil inlets on the splie plane. Thrust collar is shrink-fitted on the pinion shaft end. The thrust bearing of the taperland type is fitted at the pinion generator side. The metal surface of the thrust bearing consists of the taper and flat plane, and makes the effective oil film. The wheel bearing of turbine and generator sides are ordinary plane type. The thrust bearing of the wheel shaft is fabricated with the generator side wheel journal bearing. The oil guard is provided at the parts where the shaft penetrates the gear casing. (3) Oil Sprayer
The priming oil pump is of the gear type and driven by the motor. The pump is used for the turbine start and stop. The pump is started and stopped automatically. In case the switch of the starter is “AUTO”, the pump is started automatically at abt. 40kPaG of the bearing oil pressure and stopped automatically at 90~150kPaG. NOTE It is important to confirm that the priming oil pump is started and the bearing oil pressure is normal at turbine starting (3) Oil Pressure Adjusting Valve
The oil is supplied to meshing surface of the reduction gear by the oil sprayer. The sprayer is of the perforated nozzle injection type and fitted in the gear casing wall.
A part of oil sent from the oil pump is adjusted by the control oil pressure adjusting valve to the 0.64 ~ 0.93MPaG and acts as control oil, and the remaining oil is adjusted by the L.O. pressure adjusting valve to 100~150kPaG and acts as lubricating oil.
(4) Turning Equipment It is constructed that this turning equipment is able for motor turning and manual turning. For the motor-turning, engage the clutch by pulling the clutch lever while slightly rotating the motor end nut clockwise.
1- 21
For adjusting valve the oil pressure, remove the cap and turn the adjusting screw. Clockwise turning of the adjusting screw makes the actuating oil pressure up and vice versa.
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 1.3.1b Control Oil Press. Adjusting Valve
Control Oil Pressure Adjusting Valve
L.O Pressure Adjusting Valve
Adjusting Screw
5) Check the steam pressure and temperature before the main stop valve.
bearing oil pressure gets to normal pressure.
(1) Don’t start the turbine if the steam press. And temp. are lower than normal value.
14) Fully open the main stop valve after confirming the governing operation of turbine.
6) Supply the air to the sealing controller and check the sealing steam supply.
(1) Confirm the pressure, temperature, vibration, etc. of all the parts in normal conditions. (2) Turn the main stop valve handle clockwise for about a 1/2 revolution after the valve stem reached the stopper (full open). (3) Try overspeed trip test at no load if chance is offered.
(1) Confirm the packing steam pressure 1~20kPaG.. 7) Open the needle valve for gland steam exhaust.
15) Close the drain valves on main steam line. (1) Take care the packing steam pressure not to be in vacuum. (2) Prevent the steam from abnormal leaking at penetrating parts between rotor and turbine casing. 8) Fully open drain valves of the main stop valve and on main steam piping.
16) Close the drain valve on the main stop valve. (1) Take care of the drain, since the remainder of the drain often brings into accident. 17) Adjust the voltage and frequency.
9) Put turning device on. (1) Check there is no abnormal sound in the turbine. (2) After turning, take off the turning device fully after turning. 4. Preparation for Operation Starting Operation 1) Confirmation and preparation before Starting. (1) Confirm the steam source and electric source are ready for operation. (2) Check all gauges indication zero point. (3) Check the oil level in oil tank at “NORMAL”. (4) Check the circuit breaker is open. (5) Confirm the main stop valve, exhaust valve and packing steam valve are closed.
10) Remove air gathering in the governor. (In case that the turbine has been in a stand still for a week or longer.) (1) Set the knob of load limiter to the indication of “10”, and move the governor output shaft back and forth completely, and air gathering in the governor can be removed. (At this time, the load indicator moves “0” to “10”) (2) Carry out this procedure two or three minutes. 11) Set the synchronizer to the indication of “0” by turning the synchronizer. 12) Open the governor valve by the starting lever. (1) Confirm the governing valve opened.
18) Put the turbine speed in parallel with the other generator with the synchronizer on the electric panel. 19) Shift the load gradually. During Operation 1) Watch and take the indications of the gauges, thermometers and other instrument with scheduled intervals. 2) If the turbine tripped automatically, carefully check the cause before resetting the trip. 3) Operate Test the function of the emergency trip such as overspeed trip etc. whenever chances are offered. (2~3months intervals). 4) Operate the main stop valve slightly once a day during operation to prevent the sticking.
2) Start the priming LO pump. 13) Open the main stop valve by hand. (1) Confirm the bearing oil pressure reaches approx. 20~30 kPaG. 3) Open the cooling water inlet and outlet valve on LO Cooler. 4) Start the cooling water pump and send the cooling water to the LO cooler. (1) Open the vent valves on the water heads of the LO cooler and confirm the cooling water is flowing.
(1) Start the turbine gradually and drive at about 400 Rpm and keep it for about 25 minute. for warming. If there are any vibration of abnormal sound at this time, stop the turbine and check the cause. (2) If there are some abnormal conditions at turbine starting, stop the turbine and within 3 minutes after complete stop, turning should be commenced. (3) Confirm delivery pressure of the main oil pump and bearing oil pressure increase as the turbine speed increase. (4) Confirm the priming LO pump stops automatically when the
1- 22
5) If the bearing temperature rises to 77ºC, check the oil and cooling water temperature. If the temperature rises more abruptly, stop the turbine and check the cause. 6) Check the oil level in oil tank. 7) Change over the duplicate oil strainer at least once a day during the first voyage, and clean the strainer with air jet. 8) Check the leakage of oil, water, steam and etc. all over the unit, specially loosing of the flange bolts.
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 9) Confirm there is no abnormal vibration and sound on the turbogenerator
Illustration 1.3.1c Time Schedule for Starting of Generator Turbine
10) Confirm the oil flow with the sight glasses provided on the generator bearing outlet and turbine bearing outlet.
(Model : RG92(-2))
11) Take care of drain from main steam piping especially. When the drain goes into the turbine set, shift the load to other generator and stop the turbine, then, check the thrust bearing and the other parts.
Speed Up by Gov.
Stop Operation
1,800 rpm (100%)
1,710 rpm (95%)
1) Shift all the load to the other generator. 2) Cut off the circuit breaker.
1,450 rpm (80%)
5) Open the drain valve of the main stop valve and the casing drain valve. (1) Drain off fully and don’t leave the drain in the turbine set. 6) Open the drain valve of exhaust valve.
Revolution
4) Open the drain valves on main steam line.
Critical Speed 1,000 rpm ~ 1,350 rpm E.S.V. Close
Turbine
(1) Confirm the priming L.O. pump starts automatically when the turbine speed down.
(rpm)
3) Shut the main stop valve by the handle or hand trip lever.
900 rpm 750 rpm
7) Rotate and turn the shaft. (1) Carry out the turning for 120 min. or over. When the generator turbine has to be started within 2hours after stopping, idling time should be extended than normal starting, then increase the speed slowly while carefully watching the vibration & noise, etc. If there is an abnormality, stop the turbine immediately by hand trip. (2) Carry out the turning until the temp. indicated on the local inlet steam thermometer lowers to 100ºC. 8) Stop the sealing steam supply.
600 rpm 400 rpm Turning
Stand-by Warming
9) Stop the cooling water pump. 10) Stop the priming L.O. Pump. (1) Drive the priming L.O. Pump for about 90 min. after turbine stop. 11) Close all valves.
~60 min.
Idling Warming 1 Min..
Over 25 min.
Preparation Before Starting
Speed Up
10 min.
10 1 1 sec. 5 min. 5 min. min. min.
ab. 4~10 min.
Turning
20~30 min.
1- 23
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA
Machinery Operating Manual
Blank Page
1- 24
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual 2. Specification
The disc rotor has two rows of moving blades fastened along the periphery and four balance holes. The turbine shaft has the disc rotor arranged at the middle and connects to the driven machine at one end through the coupling and at the other to the main L.O pump and the worm gear for driving the governor and the trip shaft with eccentric ring for over-speed trip. The governor acts accurately against changes in steam pressure, temperature and load. In case of sudden load change from rating to zero or from zero to rating, turbine revolutions can be kept instantaneously within ±9% and settled within ±1%. The emergency shutdown device for this turbine serves to stop the turbine by closing the governor valve by the action of the trip hydraulic servomotor. Especially, the trip servomotor actuates to stop the turbine, so the action is sure and reliable.
110
SHINKO IND. LTD DE 570 5.88 510 0.177 6,100 4 m3/h x 100kPaG 7.2 m3/h x 40kPaG 1 kW x 3600 rpm
kW MPaG °C MPaG
5500
100
5000 90
H-Q
1000
100
900
80
800
η
60
p
700
40
600
20
500
0
P kw
400
20
300
Hs
200
15
m
10
100
5
0
Common Cooling water required Cooling water temp LO tank Governor
6000
80
Turbine Maker: Type: () Output Rated: () Steam inlet: Initial temp.: Exhaust: () R.P.M: Main L.O pump: Prim. L.O pump: Prim. L.O pump motor:
6500
N rpm
N rpm
m3/h MPaG MPaG MPaG MPaG °C m
0 0
15 m3/h x 100kPaG 36 380 2
Overspeed trip Turbine sentinel valve Back pressure trip Priming LO pump Auto stop Low oil pressure switch (Alarm) Low oil pressure switch (Trip) Turbine rotor vibration
Set 7,015 Set 0.4±0.2 Set 0.327±0.02 Set 100±10 Set 60(+8, -0) Set 50(+8 ,-0) alarm : 80±10 trip : 140±15
PUMP EFFICIENCY ηp (%)
The turbine casing is horizontally split into two parts. The steam chest is a single assembly mounted on the vertical flange face at the governor end of the casing body (lower casing) incorporating the exhaust opening. The nozzle plate and stationary blades are fastened to the inner face of the steam chest.
Total Head = 865 m, Output = 570 kW, Suction Head = 25 m Steam Inlet Pressure = 5.88 MPaG, at Temperature = 510 C, Exhaust Pressure = 0.18 MPag
SHAFT HORSE POWER P (kW)
This turbine is of the horizontal single stage speed compound impulse type and the turbine shaft is directly coupled to the pump shaft through flexible coupling. For control of operation the type UG governor of Woodward Governor Company of USA is used and its speed setting mechanism and pressure controller unit are interconnected to effect constant discharge pressure control. For this turbine a forced lubrication system is adopted, providing a main L.O pump driven by gearing at the bottom end of the turbine shaft. The main L.O pump is of the double helical gear type and is mounted at the lower part of the governor end bearing housing. The priming L.O pump of the centrifugal type is designed to form a compact unit with a vertical motor and is submerged in the oil tank like the main oil pump.
SHINKO IND. LTD DMG125-3 Rated 175 8.18 8.17 0.229 0.229 127 11.2 0.9371
25
50
75
100
125
150
175
200
8000
℃ litre litre rpm MPaG MPaG kPaG kPaG kPaG ㎛/ p-p ㎛/ p-p
7000 H.N.V. = CLOSE at 460 kw
6000
H.N.V. = OPEN
5.067 t/h 4.754 t/h
5000
4.08 t/h 4000
3000
2000
1000
780 770 760 750 740 730
iE : Exh. Enthalpy (kcal/kg)
Maker: Type: Capacity: Disch. Press.: (Total head) Suction Press.: Suction Head : Water Temperature: N.P.S.H.R: Specific gravity
Max. 570 kW
The type DMG pump is of multi-stage, volute type marine feed pump and has a horizontally spilt casing construction for easy handling. The first stage impeller is of the double suction type and the rest are of the single suction type. The rotor is supported by forced lubricated plain bearings and tilting pad type thrust bearing. The pump is directly connected to the driver through a forced lubricated gear coupling.
Expected Characteristic Curve
257 kW at 175 m3/h
Pump
458 kW at 145 m3/h
1. General
3. Performance curves
Steam Consumption W (kg / hr)
1.4 Main Feed Water Pump Turbine
Disch. Press. (kg/cm G)
LNGC GRACE ACACIA
720 0 0
1- 25
100
200
300
400
500
600
700
OUTPUT (kW)
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.4.1 Operating procedure 1. Preparation for Starting
button C” of the machine side turbine starter. For the above trip device, reset according to the time of the actuation of the following trips and at the same time confirm the extinction of the trip indication lamps.
1) Carry out preparations for starting the driven machine.
(1) Mechanical overspeed trip---------------------A (2) Electric overspeed trip------------------------- C (3) Low L.O pressure trip--------------------------C (4) High back pressure trip-------------------------C (5) Hand trip -----------------------------------------B, A
2) Set the operation selecting switch on the machine side turbine starter at “Manu”, and switch on the electric source (AC 440V DC 24V) 3) Check the quantity of oil in the oil tank by the oil level gauge and governor oil level gauge. If insufficient, supply oil up to the specified level. However, when the turbine begins operation and the oil circulates, the oil level will fall to some extent, so it is necessary to raise the level somewhat above the normal. (Especially, attention is necessary when operating the turbine for the first time.)
15) Turn fully counter clockwise the adjusting knob of the governor by hand to set the governor to minimum speed (70% speed).
increase the opening degree of the steam inlet valve and raise the speed up to the minimum revolutions (70% speed ) in about 10 minutes. 7)
When the turbine revolutions reach the minimum revolutions (70% speed) increase them gradually by means of the manual operation knob for the pressure controller and then carry out constant speed control at the desired speed.
NOTE When changing over to the constant pressure control, first increase the turbine speed until the pump discharge pressure becomes equal to the preset value and then set the change-over switch to “Auto”. 3. Stopping
16) Open the root valves for the pressure gauge and pressure transmitter. 1) Set the operation selecting switch to “Manu”.
4) Open the drain cock at the bottom of the oil tank to check for mixing of water and extent of pollution. 5) Start the priming L.O pump and confirm that oil pressure is above 0.03MPa. Set the starter change-over switch to “Auto”. 6) Turn the L.O strainer handle several times to clean the screen and discharge the drains from the drain cock at the bottom.
17) After setting the pump discharge pressure by means of the setting knob of the pump discharge pressure controller provided in the machine side turbine starter set the change-over switch to “Auto”. 18) Confirm 2 to 3 times that the shutdown mechanism operates when the stopper is disengaged by pulling the hand trip knob and then the knob is pressed.
2) Set the change-over switch for the pressure controller to “Manu” and decrease the turbine revolutions gradually to the minimum by means of the manual operation knob. 3) If the steam inlet valve is closed by means of the handle or the valve operating push-button for the machine side turbine starter, the turbine will stop.
2. Starting 7) Pass cooling water to the L.O cooler. 8) Pass cooling water to the condenser and operate the condensate pump and vacuum device unit. 9) Open fully the main steam valve for the boiler and main steam line excepting the turbine steam inlet valve. 10) Open the valves attached to the drain traps for the main steam pipe and governor valve casing to discharge the drains completely, and then close the by-pass valve only.
This turbine is provided with the sequential automatic starting and stopping device by means of the turbine starter, but for the sequential starting by means of the turbine starter, refer to the separate instruction booklet. Here only the machine side manual operation is described. 1) Confirm that the operation selector switch is set at “Manu”, and the change-over switch for the pressure controller is set at “Manu”.
4) When revolutions decrease and bearing oil pressure falls below 0.045 MPaG the priming L.O pump starts automatically, keeping oil pressure at above 0.03MPaG approximately. 5) Stop the cooling water to the L.O cooler. 6)
Close the steam root valve for the boiler or the main steam line.
7) Close the exhaust valve. 2) Open the steam inlet valve gradually and begin to start the turbine. Then warm up the turbine for some time by keeping the speed at 100 to 500 rpm at output shaft.
8) When the turbine has stopped, open the drain valve on each turbine part to discharge the drains completely.
11) Open the exhaust valve. 3)
During this time check whether or not there is abnormal noise or vibration in the turbine and main feed pump. In case any abnormal state is felt, stop the turbine immediately and trace the cause.
4)
Close each drain valve on making sure that the drains have been completely discharged from each portion.
12) Open the valve attached to the drain traps for the turbine casing and exhaust pipe to discharge the drains completely, and then close the bypass only. 13) Remove the end cover of the pump bearing housing and confirm that the shaft turns smoothly by giving it at least one rotation using the squared shaft end. 14) Reset the turbine at the operation condition if it is in the tripped condition. The reset device of each trip comprises “reset knob A” and “hand trip knob B” of the hand trip position and “reset push
5) Confirm that the governor valve closes rapidly by operating the hand trip knob for the trip device provided on top of the turbine governor end bearing housing. 6)
After sufficient warm up, open fully the exhaust valve, and then
1- 26
9) After stopping the turbine, operate the priming L.O pump for about 20 minutes. After stopping the priming L.O pump, confirm that the turbine bearing temperature does not rise above 80 deg C. 4. Emergency stop This turbine is provided with the hand trip as emergency stopping device, and the turbine can be stopped by actuating it regardless of its operating condition. Namely, remove the stopper of the hand trip knob for the trip device provided on top of the turbine governor end bearing housing, then press the knob, and the shutdown mechanism actuates, closing the governor valve and this stopping the turbine.
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.5 Diesel Generator Engine
3. Operation Data and Set Points
1. General Engine with the type designation 7L27/38 are turbocharged, unidirectional, fourstroke, in-line engines with a cylinder bore of 270 mm and a stroke of 380 mm. They are used for marine propulsion and auxiliary applications, and as stationary engines in power stations.
Normal value at full load at ISO condition Lubricating Oil System Lubricating Oil Sys. Temp. after cooler (Inlet filter)
TI21
68~73℃
Pressure after filter (Inlet engine)
PI22
0.42~0.5MPa
Pressure drop across filter
PDAH21~22
The turbochargers and charge-air coolers are at the free engine end on generator engines. Cooling water and lube. oil pumps can be driven via a drive unit on the free engine end.
Prelubricating pressure
Engine of the type L27/38 have a large stroke/bore ratio and a high compression ratio. These characteristics facilitate an optimization of the combustion space geometry and contribute to a good part-load behavior and a high efficiency.
The engine has two camshafts. One of them is used for inlet/exhaust valve actuation on the exhaust side, the second one serves to drive the injection pumps on the exhaust counter side. Hydraulically actuated adjusting devices permit adjustment of both the valve timing and the injection timing, depending on the design ordered.
2. Specification
Vertical in-line, 4-cycle, direct injection, single acting, trunk piston type with exhaust turbocharged and charge air cooled design Maker: Engine model: Number of cylinder: Cylinder bore: Piston stroke: Rated output: Mean piston speed: Swept volume per cylinder: Mean effective pressure: Max. combustion pressure: Rotating direction:
HHI-EMD 7L27/38 7 270mm 380mm 2100kW 9.1m/s 21.8litre 2.3MPa 19±0.5MPa Clock-wise
2) Engine Performance -
Specific fuel consumption: Combustion air consumption: Exhaust gas flow: Exhaust gas temperature:
TAH
80℃
PAL22
0.35MPa
PSL22
0.25MPa
0.01~0.1MPa
PDAH21~22
0.15MPa
PI22
0.014~0.14MPa
PAL25
0.012MPa
Pressure inlet turbocharger
PI23
0.15±0.02MPa
PAL23
0.09MPa
Pressure before filter
PI21
0.15~0.55MPa
Temp. main bearing
TI29
80~95℃
TAH29 TSH29
100℃ 105℃
Pressure after filter
PI40
0.3~0.6MPa
PAL
0.2MPa
Temp. inlet engine
TI40
30~40℃
Pressure LT system, Inlet engine
PI01
0.25~0.45MPa
PAL
0.04Mpa
Pressure HT system, Inlet engine
PI10
0.2~0.4MPa
PAL10
0.04Mpa
Temp. HT system, Outlet engine
TI12
75~85℃
TAH12
90℃
TSH12
100℃
Exh. Gas temp. before T/C
TI62
480~530℃
TAH62
570℃
Exh. Gas temp. outlet cyl.
TI60
350~450℃
TAH60
465℃
Avr. ± 30℃
TAD60
Avr ± 50℃
SAH81
828rpm
SSH81
828rpm
Fuel Oil System
1) Principal Particular
-
Alarm set point and shutdown set point
189g/kWh + 5% 14070kg/h 14488kg/h 330℃
Cooling Water Sys.
Exh. Gas System
Diff between individual cyl. Speed Control Sys.
SI90
720rpm
-
1- 27
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA 4. Preparation for Starting the following describes what to do before starting when the engine has been out of service for a period of time. Lubricating Oil System
Machinery Operating Manual 13) Start the engine by activating the start button on the operation box ; push the button until the engine ignites.
24) The fuel oil pressure must be kept at the stated value. 25) The cylinder cooling water temperature must kept within the limits indicated on the data and setpoints sheet.
Testing during Running Check the following on the monitoring box according to the data and setpoints sheet.
1) Check the oil level in the base frame with the dipstick.
26) The exhaust gases should be free of visible smoke at all loads. For normal exhaust temperatures
14) Check the lubricating oil pressure. 2) Check the oil level in the governor as the level indicator on the governor.
15) Check the cooling water pressure.
3) Start up the prelubricating pump.
16) Check the fuel oil feed pressure.
NOTE The engine must be prelubricated for at least 30min prior to start-up (at the first starting-up, or if the engine is cold, the engine must be prelubricated for at least 60min.) or check that there is oil coming out at bearings, pistons and rocker arms. 4) check pre.lub.oil pressure at inlet to filter, inlet of the engine and inlet turbocharger on the monitoring box display according to the data and setpoints sheet.
27) Keep the charging air pressure and temperature under control. For normal values Stopping
17) Check that the turbocharger is running.
28) Before stopping, it has to run the engine at reduced load, max.2min.
18) Check that the prelubricating oil pump stops automatically.
29) The engine is stopped by activating the stop button on the operating box. Only one push is needed.
19) Check that all cylinders are firing NOTE Check the stop cylinder(Lambda controller) for regulating the shaft works properly, both when stopping normally and at overspeed and shut down.
Cooling Water System Check that all shutdowns are connected and function satisfactory. 5) Open the cooling water supply 6) Check the cooling water pressure. NOTE To avoid shock effects owing to large temperature fluctuations just after start, it is recommended (1) To preheat the engine. Cooling water at least 60℃ should be circulated through the frame and cylinder head for at least 2hours before start. Starting Air System
20) Test the overspeed 21) Check that all alarms are connected. Operation The engine should not be run up to more than 50% load to begin with, and the increase to 100% should take place gradually over 5 to 10min. NOTE When the engine is running the planned maintenance programme and the following should be checked :
9) Check the pressure in the starting air receiver 10) Drain the starting air system. 11) Open the starting air supply 12) Check the air pressure on the operating box according to the data and setpoints sheet. Starting
22) The lubricating oil pressure must be within the stated limits and may not fall below stated minimum pressure. The paper filter cartridges must be replaced before the pressure drop across the filter reaches the stated maximum value, or the pressure after the filter has fallen below the stated minimum value. Dirty filter cartridges cannot be cleaned for reuse. 23) The lubricating oil temperature must be kept within the stated limits indicated on the data and setpoints sheet
1- 28
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA
Illustration 1.6.1a Fresh Water Generator
Feed Water Preheater
Key Steam Line Condensate Line
Condensate for Desuperheating Max. 1.3 MPa & 50 ℃ Max. 188.5 lbs/in2
Condensate for Desuperheating Max. 1.3 MPa & 50 ℃ Max. 188.5 lbs/in2
Fresh Water Line Vacuum Line Sea Water Line
Air Inlet 0.5-0.9 MPa 73-131 lbs/in2
Air Inlet 0.5-0.9 MPa 7.3-131 lbs/in
Air Inlet 0.5-0.9 MPa 7.3-131 lbs/in
Air Line
No.1 F.W.Generator
PI TI
H
PIC
PI TI
H
Back Pressure
PI PI TI
PC
H
Evaporator H
Flow Indicator Flow Reg. Valve H
H
FG
H
Feed Water Treatment
Non Return Valve
PI
Over Board Max. Back Pressure 0.06 MPa G 8.7 lbs/in2
PI
PI
H
H
TI
PI
PI
Solenoid Valve
H
H
Flow Reg. Valve H
FQ
Feed Water Treatment
FG FG
H
Non Return Valve
PI
Low Points On Steam Line To be Drained
Over Board Max. Back Pressure 0.06 MPa G 8.7 lbs/in2
PI
PI
TI
To Condensate Tank/Well Max. Back Pressure 0.16 MPa G 23.2 lbs/in2
1- 29
H
Shut-off Valve (VA-FT-01)
TI
H
Brine / Air Ejector
Control Panel
Air Inlet 0.5-0.9 MPa 73-131 lbs/in2
H
Flow Indicator
FG
Ejector Pump
From Sea
To Fresh Water Tank Max. Back Pressure 0.25 MPa G 36.25 lbs/in2
PI
Min. Press. 0.35 MPa 50.75 lbs/in2
H
H
Control Panel
Spring Orifice Loaded Valve
PI
Brine / Air Ejector Ejector Pump
To Condensate Tank/Well Max. Back Pressure 0.16 MPa G 23.2 lbs/in2
PT QT
FG FG
H
Evaporator
Fresh Water Pump (PU-FR-01)
H
H
FQ
Low Points On Steam Line To be Drained
H
Shut-off Valve (VA-FT-01)
TI
Condensate Pump (PU-SS-01)
H
Solenoid Valve
H
PI
Min. Press. 0.35 MPa 50.75 lbs/in2
QT
PC
H
PT
Spring Orifice Loaded Valve
TC
H
Fresh Water Pump (PU-FR-01)
Flow Reg. Valve(VA-SS-02)
TI
H
Condensate Pump (PU-SS-01)
PI
525 Limited Switch
TC
TI
Design 0.11 MPa & 300 ℃ Max. 0.3 MPa G & Max. 300 ℃
PI
525 Limited Switch
Design 0.11 MPa & 300 ℃ Max. 0.3 MPa G & Max. 300 ℃
PIC
PI
PI TI
Flow Reg. Valve(VA-SS-02)
Condenser
TI
H
Solenoid Valve
H
Back Pressure
PIC
Condenser
TI
Solenoid Valve
(VA-CO-02)
H
H
(VA-CO-02)
Vacuum Release Valve(VA-E1-01) Opening Pressure Max. 0.1 MPa 14.5 lbs/in2
H
PIC
Vacuum Release Valve(VA-E1-01) Opening Pressure Max. 0.1 MPa 14.5 lbs/in2
No.2 F.W.Generator
Max. Condensate Inlet Pressure : 1.3 MPa G 188.5 lbs/in2 33 ℃
H
Air Inlet 0.5-0.9 MPa 73-131 lbs/in2
PI
H
H
From Sea
To Fresh Water Tank Max. Back Pressure 0.25 MPa G 36.25 lbs/in2
Air Inlet 0.5-0.9 MPa 73-131 lbs/in2
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.6 Fresh Water Generator 1. General The combined brine/ejector driven by the ejector pump creates a vacuum in the system in order to lower the evaporation temperature of the feed water. The feed water from the ejector pump is introduced into the evaporator section through an orifice, and is distributed into every second plate evaporation channel. The hot water is distributed itself into the remaining channels, thus transferring its heat to the feed water in the evaporation channels. Having reached boiling temperature, which is lower than at atmospheric pressure, the feed water undergoes a partial evaporation and the mixture of generated vapour and brine enters the separation vessel, where the brine is separated from the vapour and extracted by the combined brine/air ejector. The cooling water supplied by the combined cooling/ejector pump on No.1 FWG and supplied from the condensate pump on No.2 FWG distributes itself into the remaining channels, thus absorbing the heat being transferred from the condensing vapour. The produced freshwater is extracted by the fresh water pump and led to the fresh water and distilled water tanks. If the salinity of the produced freshwater exceeds the chosen maximum value, the dump valve and alarm are activated to automatically dump the produced fresh water into the separator vessel.
Pressure drop of Sea water flow: Steam flow: Steam pressure: Electric source (Main, Control): Salinometer model:
0.02MPa 2,742 kg/h 0.07MPa 3 x 440 x 60Hz, 220V DS-205
3) Condensation After approx. 3 minutes the boiling temperature will drop again, and normal vacuum is re-established.
3. Operating Procedure
(1) Open valve to freshwater tank.
CAUTION Before starting, please follow the instructions for feed water treatment, see “Chemical dosing of scale control chemicals”.
(2) Start freshwater pump.
1) Starting (1) Open the valves on the suction and discharge side of the ejector pump.
NOTE The freshwater pump pressure must be between 0.12 and 0.16MPa . CAUTION After starting the freshwater pump the flow sight glass in the air suction pipe muse be empty.
(2) Open the overboard valve for combined brine / air ejector. (3) Close the air screw VA-E1-01 on the separator. (4) Start the ejector pump to create a vacuum of min. 90% and ensure that the pressure is over 0.35MPa at the combined brine/air ejector inlet and the back pressure is not over 0.06MPa at the combined brine/air ejector outlet. For VSP-36-125CC only (5) Open the condensate inlet, outlet and by-pass valves.
2. Specification of Fresh Water Generator
until the specified steam pressure is reached (Max 0.075MPa).
4) Stopping the Fresh Water Generator (1) Close the steam pressure regulating valve VA-SS-02 by adjusting the set point for the steam pressure controller in control panel slowly (step-wise) to 0.000MPa (2) Close the valve for air inlet. (3) Close the main steam shut-off valve. (4) Close the valve for condensate for desuperheating inlet.
Type: Number of units: Capacity per unit: Condensate water temperature inlet: Condensate water temperature outlet: Condensate water flow: Max salinity: Pressure drop of Cooling water flow: Steam flow: Steam pressure: Electric source (Main, Control): Type: Number of units: Capacity per unit: Sea water temperature inlet: Sea water temperature outlet: Sea water flow: Max salinity:
VSP-36-125CC (Condensate Cooled) 1 set 60 ton/day 33.6 °C 61.3 °C 53 m3/h 1.5 ppm 0.05MPa 3,031 kg/h 0.075MPa 3 x 440 x 60Hz, 220V VSP-36-125SWC (Sea Water Cooled) 1 set 60 ton /day 32 °C 48.3 °C 90 m3/h 1.5 ppm
(6) Start condensate supply to condenser by adjusting the by-pass valve incrementally until the desired condensate flow is reached. 2) Evaporation When there is a minimum of 90% vacuum (after maximum 10 min.).
(5) Close the valve for feedwater treatment VA-FT-01. (6) Stop freshwater pump PU-FR-01 and condensate pump PU-SS-01. (7) Stop the ejector pump, after approx. 10 min.
(1) Open valve for feed water treatment VA-FT-01. (2) Ensure that the air inlet for steam pressure regulating valve VASS-02 and flow regulating valve VA-CO-02 is open ( 0.5~0.9MPa).
(8) Open the air screw VA-E1-01. (9) Close all valves on the suction and discharge side of the pump. (10) Close the overboard valve for combined brine / air ejector.
(3) Ensure that the condensate inlet for desuperheating is open ( maximum 1.3MPa ). (4) Open the valve for condensate to atmospheric drain tank. (5) Open the main steam shut-off valve.
(11) Close the valve to freshwater tank. CAUTION All valves must be shut while the distiller is out of operation, except for the vacuum break.
(6) Open the steam pressure regulating valve VA-SS-02 by adjusting the pressure controller in the control panel step-wise 0.01MPa,
1- 30
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 1.7.1a Bow Thruster Control System
PORT Wing
Thrust Room
W/H Panel
THRUSTER CONTROLLER
Bosun Store
ALARM THRUSTER ABN.
PORT D & T to be connected each flange using temporary Hose.
INDICATOR CONTROL SOURCE
000
A
000
000
000
BLADE NEUTRAL
MAIN MOTOR
THRUSTER ABN.
000
MAIN SOURCE
ALARM
EM'CY STOP
ALC OPERATE
READY TO START
POWER AVAILABLE
A
000
000
000
000
CONTROL STATION
DIMMER CHANGE OVER
THRUSTER RUN
LAMP BUZZER TEST
BUZZER STOP
EM'CY STOP
DIMMER CONT. STATION
BLADE ANGLE INDICATOR
Header Tank
000
BLADE ANGLE
CONTROL STATION
T
MAIN MOTOR
M/MOTOR OVERLOAD
0
P S
ALARM
D
THRUSTER CONTROLLER
THRUSTER CONTROLLER
MAIN MOTOR
M/MOTOR OVERLOAD
0
ST'BD Wing
DC SOURCE FAIL
M.MOTOR START FAIL
M.MOTOR OVER LOAD
HYD. P/P LOW PRESS
HEADER TK. LOW LEVEL
HYD. P/P OVER LOAD
SYSTEM FAIL
M/MOTOR TRIP
PORT
W/H
AC SOURCE FAIL
M/MOTOR INSULATION LOW
WING
5
0
5
NONFOLLOW
FOLLOW
PORT 10
5
0
LAMP TEST
FAN RUN
HYD. PUMP RUN
ST'BD 10
5
5
5
10
ST'BD 0
THRUSTER RUN
5
0 PITCH CONTROL
PORT STOP
BLADE ANGLE INDICATOR
PORT
0
FLICKER STOP
5
0
BUZZER STOP
ST'BD 10
5
PITCH CONTROL
PITCH CONTROL
5
LAMP BUZZER TEST
EM'CY STOP
POWER REQUEST
M/MOTOR HIGH TEMP
10
10
PORT
THRUSTER RUN
BLADE ANGLE INDICATOR
ST'BD 10
CONT. MODE LOCAL
CHANGE OVER
5
10
ST'BD
5
PORT
ST'BD
CONTROL POWER
C
S
10
10
OFF
ON
10
DIMMER
PORT
10
ST'BD
PORT C & S to be connected each flange using temporary Hose.
Return Suction
PORT D & E to be connected each flange using temporary Hose.
PORT B & T to be connected each flange using temporary Hose.
Hyd. Pump Unit
B
Terminal Board A, B
Hand Pump E
A Flow Regulator
B D C
A E
A
B
P
T
Solenoid Valve
T
PORT C & E to be connected each flange using temporary Hose.
Engine Room
Relief Valve
Pressure Switch M
Gear Pump S
Stop Valve
Key PORT A & S to be connected each flange using temporary Hose.
Lubricating Oil Line Air Line
Thruster Main Unit
Drain Line
1- 31
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 1.7 Bow Thruster
The propeller hub is flange mounted on the propeller shaft and contains a crosshead which sets the pitch of the propeller blades via sliding blocks and crank ring. The position of the crosshead is hydraulically controlled by hydraulic oil through OT tube and OD box.
1. Specification Thruster unit Maker: No. of sets: Model: Type: Outpower: Propeller diameter: Position of propeller blade: Input shaft speed:
KTE Co.,LTD 1 SET TCT-280 4 bladed, skewed, Controllable Pitch type 2,500 kW 2,800 mm Starboard side 880 rpm
4) Blades and Blade Seals
The reducing action is achieved when the current signal is reached to the preset level which corresponds to the rated load of motor. The action is automatically reset when the load is decreased. 3. Main Function
The propeller blade palm seals prevent the ingress of sea water into the hub or the leakage of oil from the hub. In order to facilitate rapid servicing and to reduce the time spent in dry dock, should a blade or blade seal be damaged, arrangements have been made which allow individual blades to be removed with the thruster unit sit in the tunnel.
1) Auto blade angle control Main function of this system is to control blade angle with command value. That is to say, this system controls blade angle automatically with command, when follow up control algorithm is used. If feedback value becomes close to command value, this system does not transmit S/V control signal constantly, but pulse signal with constant time interval, and feedback value can reach the objective value quickly without overflowing command value.
5) Lubrication
Main motor Type: Output x Revolution: Voltage x frequency: Starting method:
panel. It has function that the blade angle is automatically reduced to protect the main motor overload.
3) Hub
3Phase induction motor 2,500 kW x 880 rpm AC 3ø x 6,600 V x 60 Hz Auto transforming starting(50%)
Lubrication of the spiral bevel gears and roller bearings is effected by flocking the gear housing with oil which is held at a slightly higher pressure than the external water pressure by means of a separate header tank thus preventing the ingress of sea water should shaft or blade seals leak.
2)
Change position from W/H to Wing Position can be changed to wing by pulling “CHANG OVER” button in wing control panel. If once button is pulled, wing control station lamp in W/H control panel starts flickering, and buzzer starts ringing in the form of pulse. When command value of wing control panel corresponds with feedback value, control position is turned to wing completely and wing control station lamp becomes steady state. Moreover, if W/H control station button is pulled in flickering state, then all motions are cancelled and return to previous state
Hydraulic pump 6) Controls Capacity: Speed Oil pump
AC 3ø x 440V x 60 Hz 1760rpm 29.8L/min x 9.8MPa
Flexible coupling
SF coupling 1 set / vessel
2. General The KTE TCT type thruster unit is designed to give controlled thrust to port or to starboard by varying the pitch of the propeller blades by remote control from bridge. 1) C.P.P System A constant speed, non-reversing prime mover is connected via a SF coupling to the thruster input shaft. This vertical, or fore-and-aft, drive is changed into a horizontal athwartships drive to the hollow propeller shaft by spiral bevel gears. The propeller blades are hydraulically controlled by a servomotor situated in the hub body and the axial force exerted are transmitted to blades by a crosshead and crank ring. 2) Bearing The input drive and propeller shafts are rigidly mounted on accurately located roller bearings. The bearings are dimensioned to ensure a very long trouble free life in service.
The standard electrical control system provides from the bridge. Propeller blade pitch position is mechanically feedback to the control system. The pitch feedback potentionmeter and its driving sprocket gear are contained in the feedback unit, which is mounted on the motor stand and is commected to the pitch position indicator rod which protrudes from the gear housing flange. The control and feedback potentionmeter from a balance sprit phase closed loop, feeding a high gain amplifier and phase detecting network. Movement of the control potentionmeter presents an error signal at the amplifier input, this signal is amplified and operates the phase detecting network which feeds a control signal to the solenoid valve, dircting the oil to the correct side of the servomoter cylinder which controls the pitch of the propeller blades. The electrical balance is restored by the corresponding movement on the feedback potentiometer. The system gives fine control of the pitch setting, and any deviation caused by external forces is automatically corrected. In addition, this control system provided automatic load control system which consists of PI control, load setting function and electric current signal.
Condition
Action
W/H
Wing
Feedback
Command
Command
- Position
: Port 7.0
: Zero
: Port 7.0
Push on
W/H:Flickering wing lamp
wing control
Wing:Flickering wing
button
lamp and buzzer on
Push on
Remark
W/H:Wing lamp off
wing
Wing:Wing lamp off &
control
Cancelled
buzzer off
button Push on
W/H:Flickering wing lamp
wing control
Wing:Flickering wing
button
lamp and buzzer on
Command
- Position
: Port 7.0
: Port 7.0
W/H:Wing lamp off Wing:Wing lamp off &
Ack
buzzer off
The electric current signal is supplied from the CT located at starter
1- 32
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA 3) Change Position from Wing to W/H
< Normal Operation Flow Chart >
To change control position from wing condition state to W/H is equal to previous one, and process of the motions is as follows Condition
Action
W/H
Wing
Feedback
Command
Command
- Position
: Zero
: Port 7.0
: Port 7.0
Remark
Start
Initializing System
Parameter Load
Push on W/H
W/H:Flickering wing lamp
control
& buzzer on
button Push on
W/H:W/H lamp off &
wing control
buzzer off
button
Cancelled
Push on W/H
W/H:Flickering W/H lamp
control
& buzzer on
Feedback Value > Command ?
W/H:W/H lamp go to - Position
steady wing lamp off &
: Port 7.0
: Port 7.0
buzzer off
Y
N
button
Command
Non-Follow Button on?
Ack
Wing:Wing lamp off
PORT Push Button on ?
N
Y
N
Y
PORT S/V on
PORT S/V off
PORT S/V on
PORT S/V off
4) Manual Control In this system, blade angle can be basically controlled by means of recognizing angle that users input with CPU and controlling automatically with follow up control algorithm, and another operation is not necessary. But, users must operate manually in case of not being controlled automatically because of difficulties in CPU or related components. For manual operation, users must pull non-follow button in W/H control panel, when all control signals transmitted from CPU board are blocked forcedly and users can control directly with the button below control dial.
Feedback Value < Command ?
STBD Push Button on ?
N
Y
Y
STBD S/V on
Em'cy Stop Button on ?
N
STBD S/V off
STBD S/V on
STBD S/V off
N
Y All S/V off
1- 33
Part 1 Engineering Data for Main Equipment
Machinery Operating Manual
LNGC GRACE ACACIA
RUN lamp to light up. The starting action also outputs a momentary and normally “open” no-voltage contact signal.
2) Non-Follow-up pitch control Pressing the non-follow-up button switch on the W/H stand causes a solenoid valve in the hydraulic unit to be energised, moving the blade angle in a direction for which the button switch is pressed. When the button is released, the solenoid valve will be de-energised to stop the blade angle move.
4) “THRUSTER STOP” Button Switch Pressing the THRUSTER STOP button switch when the main motor has been running causes the main motor to be stopped. The stop action also outputs a momentary and normally “closed” no-voltage contact signal.
3. OLP (Overload Protector) Function for Main Motor When the main motor’s load current exceeds the load current preset by the portable keyboard, the blade angle will be reduced automatically to decrease the load current in order to protect the main motor from being overloaded with the MOTOR FULL LOAD indicator lamp lit on the W/H Control Panel.
5) “THRUSTER RUN” Button Switch After checking that the READY TO START indicator lamp is lit, pressing the THRUSTER RUN button switch sends a starting signal to the main motor starter, which causes the main motor to start. When the main motor is running, the THRUSTER RUN indicator lamp will light up. The starting action also outputs a momentary and normally “open” no-voltage contact signal.
As the main motor’s load current decreases, the blade angle will automatically return to a blade angle equivalent to the control dial position, which causes the MOTOR FULL LOAD indicator lamp to go off. a) Rating current of main motor, 213 Amp. b) CT ratio for OLP, 400 Amp. / 1 Amp. (CT : AC1A / 40VA)
6)
“CONTROLLER ABNORMAL” Alarm If the CONTROLLER ABNORMAL alarm is given when the control position has been the W/H or a wing, the blade angle before the alarm is given will be maintained. It is recommend to change over the control mode immediately from follow to non-follow.
CAUTION Keep the CT for OLP away from CTs for other devices. 4. Controller Operation
Alarm causes simultaneously given to the W/H and both wings are as follows: - Blade angle transmitter’s potentiometer is damaged. - Control or alarm electric source fails. - CPU fails.
1) Button Switch “ CONTROL POWER ON” and “CONTROL POWER OFF” Pressing the CONTROL POWER ON button switch supplied electric sources to the system. As the CONTROL POWER OFF button switch is pressed, the electric sources will be turned off.
The following alarms are given in a control position where the control right is given: - W/H control dial’s potentiometer is damaged. - Starboard wing control dial’s potentiometer is damaged. - Port wing control dial’s potentiometer is damaged.
CAUTION Before the turning off the power sources, press the STOP button switch to stop the main motor and auxiliaries. 2) “PUMP STOP” Button Switch Pressing the PUMP STOP button switch stops pressure oil pump when they have been running. The stop action also outputs a momentary and normally “closed” no-voltage contact signal. 3) “PUMP RUN” Button Switch Pressing the PUMP RUN button switch sends starting signals to the pressure oil pump and fan starter, which causes the pressure oil pump and fan to start. Running of the pressure oil pump causes the PUMP RUN indicator lamp to light up and the running of fan causes the FAN
7)
“POWER REQUEST” Button Switch Pressing the POWER REQUEST button switch sends a main motor power request signal to the power management system (PMS) with the POWER REQUEST indicator lamp lit. When the main motor is stopped or power available on , the POWER REQUEST indicator lamp will go off to release the main motor power request signal. (the release method can be chosen with a ten key) Besides that, pressing the POWER REQUEST button switch again before the main motor runs cancels the signal.
1- 34
Part 1 Engineering Data for Main Equipment
LNGC GRACE ACACIA
Machinery Operating Manual
Part 2 : Machinery System 2.1 Steam Systems ................................................................................ 2 - 2 2.1.1 Superheated Steam System................................................... 2 - 2 2.1.2 Desuperheated Steam & Steam Dump Systems ................... 2 - 4 2.1.3 Bleed System ........................................................................ 2 - 6 2.1.4 0.6MPa Steam System .......................................................... 2 - 8 2.2 Condensate and Feed Water Systems ............................................ 2 - 10 2.2.1 Main Condensate System.................................................... 2 - 10 2.2.2 Aux.Condensate Water System .......................................... 2 - 14 2.2.3 Boiler Feed Water System .................................................. 2 - 18 2.3 Sea Water Systems........................................................................ 2 - 22 2.3.1 Main Sea Water Circulating Systems ................................. 2 - 22 2.3.2 Cooling Sea Water Service System .................................... 2 - 26 2.3.3 Marine Growth Preventing System..................................... 2 - 28 2.4 Centralised Fresh Water Cooling System...................................... 2 - 30 2.5 Boiler Water Sampling and Treatment Systems ............................ 2 - 32 2.6 Fuel Oil and Fuel Gas Service Systems ........................................ 2 - 36 2.6.1 Fuel Oil Bunkering and Transfer Systems.......................... 2 - 36 2.6.2 DO Purifying and G/E Fuel Oil System ............................. 2 - 40 2.6.3 Boiler Fuel Oil Service Systems ......................................... 2 - 42 2.6.4 Boiler Fuel Gas Service System ......................................... 2 - 46 2.6.5 IGG and Incinerator Fuel Oil System ................................. 2 - 48 2.7 Lubricating Oil Systems................................................................ 2 - 50 2.7.1 Main Turbine Lubricating Oil System ................................ 2 - 50 2.7.2 Stern Tube Lubricating Oil System .................................... 2 - 54 2.7.3 Lubricating Oil Transfer and Purifying System.................. 2 - 56 2.8 Bilge System ................................................................................. 2 - 60 2.9 Compressed Air Systems............................................................... 2 - 64 2.9.1 Control Air Systems ........................................................... 2 - 64 2.9.2 Starting Air Systems ........................................................... 2 - 66 2.9.3 Working Air Systems.......................................................... 2 - 68 2.9.4 Emergency Shut Off Air System ........................................ 2 - 70 2.10 Steering Gear............................................................................... 2 - 72 2.11 Electrical Power Generators ........................................................ 2 - 74 2.11.1 Turbine Generator............................................................. 2 - 74 2.11.2 Diesel Generator Engine................................................... 2 - 78 2.11.3 Emergency Diesel Generator ............................................ 2 - 82 2.12 Electrical Power Distribution ...................................................... 2 - 84 2.12.1 Distribution and Loading .................................................. 2 - 84 2.12.2 Turbine Generators ........................................................... 2 - 87 2.12.3 Diesel Generator ............................................................... 2 - 88 2.12.4 Batteries & Battery Charger ............................................. 2 - 90 2.12.5 Un-Interruptible Power Supplies ...................................... 2 - 91 2.13 Accommodation Services............................................................ 2 - 94 2.13.1 Provision Refrigeration System ........................................ 2 - 94 2.13.2 Accommodation and Air Conditioning Plant.................... 2 - 98 2.13.3 Package Air Conditioner................................................. 2 - 102 2.14 Fresh Water General Service Systems....................................... 2 - 104 2.14.1 Fresh Water General Service System ............................. 2 - 104 2.14.2 Distilled Water Filling Service System........................... 2 - 104
2.14.3 Sanitary Discharge System ............................................. 2 - 106 Illustration 2.1.1a Superheated Steam System......................................................... 2 - 1 2.1.2a Desuperheated Steam & Steam Dump System........................... 2 - 3 2.1.3a Bleed System.............................................................................. 2 - 5 2.1.4a 0.6MPa Steam System................................................................ 2 - 7 2.2.1a Main Condensate System ........................................................... 2 - 9 2.2.2a Aux. Condensate Water System................................................ 2 - 13 2.2.3a Boiler Feed Water System........................................................ 2 - 17 2.3.1a Main Sea Water Circulating System......................................... 2 - 21 2.3.2a Cooling Sea Water Service System .......................................... 2 - 25 2.3.3a MGPS System .......................................................................... 2 - 27 2.4a Centralised Fresh Water System.................................................. 2 - 29 2.5a Boiler Water Sampling and Treatment System ........................... 2 - 31 2.6.1a Fuel Oil Bunkering and Transfer System ................................. 2 - 35 2.6.2a Diesel Oil Purifying and G/E Fuel Oil System......................... 2 - 39 2.6.3a Boiler Fuel Oil & Fuel Gas Service System ............................. 2 - 41 2.6.5a IGG and Incinerator Fuel Oil System....................................... 2 - 47 2.7.1a Main Turbine Lubrication Oil System...................................... 2 - 49 2.7.2a Stern Tube Lubricating Oil System .......................................... 2 - 53 2.7.3a Lubricating Oil Transfer System .............................................. 2 - 55 2.7.3b Lubricating Oil Purifying System ............................................ 2 - 57 2.8a Engine Room Bilge System......................................................... 2 - 59 2.8b Oily Bilge Separator.................................................................... 2 - 61 2.9.1a Control Air System................................................................... 2 - 63 2.9.2a Starting Air System .................................................................. 2 - 65 2.9.3a Working Air System................................................................. 2 - 67 2.9.4a Emergency Shut-Off Air System.............................................. 2 - 69 2.10a Steering Gear Hydraulic Diagram ............................................. 2 - 71 2.11.1a Turbine Generators Control Oil System ................................. 2 - 73 2.11.1b Turbine Exhaust Steam System .............................................. 2 - 75 2.11.2a Diesel Generator Engine......................................................... 2 - 77 2.11.3a Em’cy Generator Engine ........................................................ 2 - 81 2.12.1a Distribution and Loading........................................................ 2 - 83 2.12.2a Turbine Generators ................................................................. 2 - 87 2.12.3a Diesel Generator..................................................................... 2 - 88 2.12.4a Battery Charger Alarm Display Monitor ................................ 2 - 89 2.13.1a Provision Refrigeration System.............................................. 2 - 93 2.13.2a Aux. Air Conditioning Plant ................................................... 2 - 97 2.13.2b Main Air Conditioning Plant .................................................. 2 - 99 2.13.3a Package Air Conditioner....................................................... 2 - 101 2.14.1a Fresh Water General Service System.................................... 2 - 103 2.14.3a Sanitary Discharge System ................................................... 2 - 105
Part 2 Machinery System Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.1.1a Superheated Steam System
Air In
Forced Draft Fan (246B)
TX TI
TI
118V PI
269B To Safety Manifold
TI
PI IAS
To Clean Drain Tank
PX CI
TI
No.2 Steam Air Heater
112V PI
Sett. 1.13 MPa PIC IAS
To Atomizing Steam for Main Boiler
111V PI
268B
TI
TX
No.2 Main Boiler Sealing Air
Forced Draft Fan (246B)
Air In 248B
113V
LS
PI PX
To Safety Manifold
269B
TI TI IAS
1.63/1.03 MPa Pressure Reducing Valve
PI IAS
Feed Fan Drive Unit
PX PIAL IAS
PX PI
169V
170V
IAS I
P
Control Air
144V
143V 102T 142V
From Main Condensate Water System
Control Air
To Clean Drain Tank H.P Turbine PI PI IAS
PI PX
123V
752V
No.2 External Desuperheater
TI IAS
Sett. 1.2 MPa
To Auxiliary Steam Desuperhater (0.98 MPa) (H.P & L.P Solo Running)
TX TI
TX
TI IAS
LS
TX
Dial Type TI IAS
TX
226V
No.1 Excess Steam Dump Valve Control Air
P
I
PI
IAS
(Inter-locking)
Control Air
P
I
No.1 External Desuperheater
728V
LS
227V
No.2 Excess Steam Dump Valve
PI IAS
PX TI
2-1
I
IAS
304V
To Clean Drain Tank
P
726V
730V
PI IAS
To Atmos. Drain Tank
152V 101T 153V
TI
PX PI
166V
To Clean Drain Tank
TX
P
154V
TI IAS
I
164V ORI-17
365B 364B 365B
Control Air
PX PI
363B
To Safety Manifold
LS
Control Air
To Clean Drain Tank
162V
165V
PX PIAL IAS
714V
707V
IAS
PIC IAS
173V
PIC IAS
TIAH IAS TI Dial Type
TX
To Clean Drain Tank
ORI-16 717V
P
715V
I
ORI-15 709V
Control Air
716V
PI
IAS
708V
PX
PIAH IAS
6.03/0.98 MPa Pressure Reducing Valve
To Atmos. Drain Tank
751V
On CI PX P.G.B.
Pressure Reducing Valve
706V
6.03/0.98 MPa Pressure Reducing Valve 704V
From No.2 M/B (Desuperheated Steam)
101V
719V 6.03/0.32 MPa
To Clean Drain Tank
TX TI
LS M
720V
PI
S
Multi Plate
TIAH IAS
From Main Condensate Water System
718V
102V
IAS
IAS
622T
P
721V ORI-14
701V
145B
PI
Sett. 0.75 MPa
TI IAS
PX
724V
702V
171V I
IAS
(Inter-locking)
725V
P
172V
Control Air
L.P Turbine
Check Valve with Handle & Dash Pot
621T 756V 749V
I
710V
Control Air
PIC IAS
753V
711V
IAS
To Safety Manifold
754V
PI
6.03/0.45 MPa Pressure Reducing Valve
(A)
To Deaerator & Distilling Plant
Sett. 0.75 MPa
217V
PI
755V 748V
167V
121V
PX
Control Air
To Atmos. Drain Tank
P
I
PI
IAS
114V
PX
712V
TI Dial Type TIAH TX IAS 705V PIAH PX IAS PI
To Soot Blowing System
PIAH IAS TI
122V
145B
168V
TX
M
PIC IAS
130V
TI IAS
110V
TX
302V 301T 303V
TI IAS
To 1st Stage Feed Water Heater
163V
TI
363B
From No.1 M/B (Desuperheated Steam)
No.1 Steam Air Heater
119V
160V
248B Forced Draft PI Fan (246B) 365B 364B 365B
To 3rd Stage Feed Water Heater
No.1 Main Boiler Sealing Air
268B
713V ORI-13
TI IAS
To Main Condenser
248B Feed Fan Drive Unit
116V
LS
Key Superheated Steam Line Desuperheated Steam Line Condensate Line Air Line Drain Line
To 1st Stage Feed Water Heater
PI IAS
PI PX
LS
From Main Cond. Pump or Cond. Drain Pump T-703V
Warming Up System
Main Steam Supply From Main Boiler
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.1 Steam Systems
3. Control and Alarm Settings
2.1.1 Superheated Steam System 1. Boiler Details Maker : No. of Sets : Model : Maximum Evaporation : Normal Evaporation : Steam Condition :
Mitsubishi Heavy Industries Ltd. 2 MB-4E-KS 68,000 kg/h 52,000 kg/h 6.03MPa superheated steam at 515°C
2. General The superheater is of the vertical, interbank, convection type arranged for multipass steam flow. Superheater elements are arranged in groups of six concentric hair pin loop elements, the ends of which are welded into the inletoutlet headers and intermediate headers. The arrangement of elements is such that the superheater tubes are parallel to the boiler generating tubes. Guide castings welded to the superheater elements and two inch generating and screen tubes form a sliding joint which aids in tube alignment. The superheater inlet, outlet intermediate header run parallel to the water drum through the depth of the boiler. Each header is sectioned internally by welded steel diaphragms to direct the steam through five consecutive passed between the headers. Complete drainage is provided by a small opening in the lower edge of plates allow access for inspecting and cleaning the superheater internally.
IAS Tag No.
Description
Setting
BS129
2 BLR DESH OUT STM PRESS H.
6.4MPa
BS298
2 BLR DRUM PRESS H/L
7.55/5.4MPa
BS122
2 BLR MAIN STM PRESS H/L
6.4/5.4MPa
BS308
2 BLR SHTR OUT TEMP H/L
530/400℃
BS001
2 BLR DSHTR OUT TEMP H
400℃
BP129
1 BLR DESH OUT STM PRESS H.
6.4MPa
BP298
1 BLR DRUM PRESS H/L
7.5/5.4MPa
BP122
1 BLR MAIN STM PRESS H/L
6.4/5.4MPa
BP308
1 BLR SHTR OUT TEMP H/L
530/400℃
BP001
1 BLR DSHTR OUT TEMP H
400℃
4. Superheated Steam System IAS Display
Taking steam from the primary superheater and leading it through the temperature control desuperheater, situated in the water drum, regulates the outlet temperature of the superheated steam for main propulsion, generator, and main feed water pump turbine. The control valve then regulates steam flow from the desuperheater to the secondary superheater section in accordance with the temperature signal from the superheated steam. To ensure that there is always a flow through the secondary superheater, a line fitted with an orifice bypasses the temperature control desuperheater and the control valve. The temperature control valve also has a bypass orifice. The main stop valves 601V and 602V interconnect both boilers and the common line and supply the main turbine with superheated steam. Each boiler has an auxiliary machinery stop valve 604V and 603V, which supplies both main boiler feed water pumps and turbo generators. The circuit is designed to supply the auxiliary machinery from either side of the manifold, giving greater flexibility for maintenance. Warming through bypass valves are provided at all the principal stop valves. Steam from the superheater outlet is led to the internal desuperheater, situated in the steam drum, from where it is distributed to the various steam service.
2-2
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.1.2a Desuperheated Steam & Steam Dump System
126V
PI TI
I LX
145V
To Clean Drain Tank
PX
167V
6.03/0.45 MPa Pressure Reducing Valve
711V
IAS I
P
710V
Control Air
702V
718V
No.2 Steam Air Heater
PI
PIC IAS
To Atomizing Steam for Main Boiler
111V PI
268B
TI TI
TX
No.2 Main Boiler Sealing Air
Forced Draft Fan (246B)
Air In LS
248B
113V
TI IAS
PI PX
To Safety Manifold
269B
PI IAS
Feed Fan Drive Unit
PX PIAL IAS
PX PI
169V
170V
IAS I
P
Control Air
Gland Steam Receiver
ORI-12
143V 102T 142V
144V
PX
I
PIAHL IAS
P
PX CI On P.G.B.
I
To Clean Drain Tank
PI PI IAS
PI PX
123V
TI IAS
Sett. 1.2 MPa
To Auxiliary Steam Desuperhater (0.98 MPa) (H.P & L.P Solo Running)
PI IAS
Main Condenser
131V
From 0.98 MPa Steam
Flush Chamber
PX TI
2-3
P
M-125V M-124V
H.P Turbine
TX
TX TI
114V
TI 112V
Sett. 1.13 MPa
To Atmos. Drain Tank
M
TI
1.63/1.03 MPa Pressure Reducing Valve
IAS
From Main Condensate Water System
110V
365B 364B 365B
PX PI
166V
To Clean Drain Tank
TX
P
PX PI
363B
I
152V 101T 153V
PIAL IAS
Control Air
154V
PX
To Safety Manifold
0.01-0.09 MPa Pressure Reducing Valve 1/0.01 MPa Pressure Reducing Valve 0.9 MPa IAS Control Air
To Clean Drain Tank
164V ORI-17
IAS 165V
On P.G.B. PI CI IAS PX
304V
TIAH IAS TI Dial Type
TX
PIC IAS
173V
P
PIC IAS
To Clean Drain Tank
ORI-16 717V
I
715V
Control Air
714V
IAS
6.03/0.98 MPa Pressure Reducing Valve
To Atmos. Drain Tank
716V
PI
707V
PIAH IAS
ORI-15 709V
PX
TI IAS
TX TI
101V
Pressure Reducing Valve
708V
704V
145B
102V LS M
720V
706V
6.03/0.98 MPa Pressure Reducing Valve
L.P Turbine
TI IAS
PX
719V 6.03/0.32 MPa
To Clean Drain Tank
Key Superheated Steam Line Desuperheated Steam Line Condensate Line Air Line Drain Line
TI
Check Valve with Handle & Dash Pot
PI
Sett. 0.75 MPa
P
721V ORI-14
701V
From No.2 M/B (Desuperheated Steam)
PIC IAS 171V
IAS
TI IAS
To Deaerator
172V
Control Air I
To Atmospheric Drain Tank
PI IAS
TX
To Safety Manifold
To Dump Steam System
Control Air
P
LX
(A)
To Deaerator & Distilling Plant
I
PX CI
121V
Sett. 0.75 MPa
PI
IAS
S
168V
712V
TI Dial Type TIAH TX IAS 705V PIAH PX IAS PI
To Soot Blowing System
Control Air
122V
145B
P
146V 147V
PIC IAS
1st Stage Feed Water Heater
ORI-11
TX
162V
TI IAS
L.X
IAS
To Safety Manifold
130V
269B TI
363B
From No.1 M/B (Desuperheated Steam)
118V
302V 301T 303V
TI
3rd Stage Feed Water Heater
163V
119V
268B
160V
248B Forced Draft PI Fan (246B) 365B 364B 365B
No.1 Steam Air Heater
No.1 Main Boiler Sealing Air
To be Fitted Reversely
PI
(For Initial Charge)
TI
TI
TI
To Distilling Plant
TI IAS S
LS
Control Air
S
Control Air
LS
T-703V
Warming Up System
Main Steam Supply From Main Boiler
Make-up From Distilled Water Tank
TX
120V
Forced Draft Fan (246B)
713V ORI-13
TI IAS
161V
Control Air
Air In
To Safety Manifold
Sett. 0.75 MPa
125V
116V
LS
248B Feed Fan Drive Unit
(Vent Line)
PI IAS
PI PX
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.1.2 Desuperheated Steam & Steam Dump Systems
(8) Make sure that the dump steam flow control valves are in auto mode.
5. Dump & Exh. Steam System IAS Display
1. Desuperheated Steam System (9) The system is now ready for use. The main piston valve and the control valves will be controlled from the ACC.
Superheated steam from each boiler’s outlet is led to an internal desuperheater, which is fitted in each boiler’s steam drum.
3. Steam Dump External Desuperheater Temperature Control These desuperheaters discharge to a common line and supply the following services:
IAS PV Temp. Cont. [Reverse] PID
SP
The HP & LP turbine solo running operation The main dump steam system The main boiler soot blowers The general service and heating steam make-up The bleed steam system make-up
OP 100%
High Selector
OP of AO 0% 0%
Manual Changeover
2. Steam Dump Desuperheaters The main boilers burn excess boil-off gas which is produced from the cargo. If the boil-off gas produced exceeds the requirements for normal steam production, then the steam production is increased and the excess steam produced is dumped to the main condenser or auxiliary condenser via the main dump external desuperheaters. The spray water for the desuperheater sprays are supplied from the discharge of the main condensate pump and the condensate drain pump. Boiler Desuperheated steam is flowed through steam dump to the main condenser. And this steam is could flow directly to atmos. drain tank. The temperature at the outlet from the desuperheater is measured and a corresponding signal is transmitted to the spray control valve, which alters the water supply accordingly. 1) Procedure for the Operation of the Steam Dump Desuperheaters (1) Make sure the instrument and gauge valves are open and instrument air is supplied to the control units. (2) Open the inlet and outlet valves of the line drain traps before the piston valve. (3) Make sure that the spray control valves are in auto mode. (4) Line up the spray water line from the main condensate pump or drain pump. (5) Open the desuperheater discharge valve to the main condenser (6) Open the main supply valve to the desuperheaters 751V. (7) Open the excess steam dump press control valve inlet and outlet valves on each desuperheater 726V, 728V, 226V, 227V.
0.5 X x(%) + 0.5 X y(%)
1
x
100%
Link
y
BLR ACC
Link
Valve Position
No.2 Steam Dump Valve MV Signal
Close 0% 0% 4 mA
100% 20 mA Control Output
Open 100%
50% OP of High Selector
No.1 Steam Dump Valve MV Signal
Open 100%
BC117 & BC118
No.1 Spray W. Valve for Dump Steam
No.2 Spray W. Valve for Dump Steam
2
From M/Cond. W. Pump Disch.
Valve Position Close 0% 0% 4 mA
No.1 Steam Dump Valve MV Signal
No.1 EDSHTR Valve
100% 20 mA
From ACC
1
Control Output
No.2 EDSHTR Valve
4-TX-58 4-TX-51
Control Air
726V No.1 Dump Valve
To Main Condenser
No.2 Steam Dump Valve MV Signal
2
728V
730V Steam Dump Piston Valve
From Desuperheated Steam
No.2 Dump Valve
IAS control steam dump external desuperheater outlet temp by a PID controller (BC116) with high selector and sprit range function. There are two steam supply valves; No.1 EDSHTR valve(BC117) and No.2 EDSHTR valve(BC118), and the PID controller controls these two valves. When PV increase, PID controller decrease OP. Higher value between output of the PID controller and output of BLR ACC steam dump controller is used as an actual output to these two valves increasing of high selector output signal from 0% to 100%, the both (No.1 & No.2) of steam supply valve will be opening from 0% to 100%. In addition, as for the input signal used for control, dual sensor change processing is performed by manually. Control diagram is shown bottom figure. 4. Control and Alarm Settings IAS Tag No.
Description
Setting
MD009
MAIN CONDSR VACUUM H
- 600 mmHg
BC039
S/B STM INLET PRESS L
4MPa
BC119
DUMP STM OUT PRESS H
0.5MPa
BC116SW
DUMP STM OUT TEMP H
400℃
2-4
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.1.3a Bleed System
126V
PI TI
269B
I LX
145V
To Clean Drain Tank
TX
To Soot Blowing System
PX
167V
6.03/0.45 MPa Pressure Reducing Valve
711V
IAS I
P
710V
Control Air
702V
PIC IAS 171V
I
TI IAS
P
721V ORI-14
102V
TX TI
LS M
101V
268B
TI
TX
No.2 Main Boiler Sealing Air
Forced Draft Fan (246B)
Air In 113V
LS
248B PI PX
PI IAS
Feed Fan Drive Unit
PIAL IAS
PX PI
169V
170V
Control Air
Gland Steam Receiver
143V 102T 142V
I
PIAHL IAS
P
PX CI On P.G.B.
I
304V
302V 301T 303V
P
PX
PI PX
123V
TI TI IAS
Sett. 1.2 MPa
To Auxiliary Steam Desuperhater (0.98 MPa) (H.P & L.P Solo Running)
2-5
P
131V
From 0.98 MPa Steam
M-125V M-124V
PI IAS
Main Condenser
Flush Chamber
PX TX
TX TI
114V
PI
PX
I
PI IAS
M
To Atomizing Steam for Main Boiler
111V
IAS
PI
110V
PIC IAS
TI TI IAS
To Safety Manifold
269B
154V
No.2 Steam Air Heater
112V
PI
Sett. 1.13 MPa
IAS
H.P Turbine
To Clean Drain Tank
164V ORI-17
TI
1.63/1.03 MPa Pressure Reducing Valve
0.01-0.09 MPa Pressure Reducing Valve 1/0.01 MPa Pressure Reducing Valve 0.9 MPa IAS Control Air
From Main Condensate Water System
To Atmos. Drain Tank
162V
TI
PX PI
166V
To Clean Drain Tank
TX
P
163V
365B 364B 365B
TI IAS
I
PX PI
363B
Control Air
160V
PIAL IAS
714V
707V
PX
To Safety Manifold
On P.G.B. PI CI IAS PX
To Clean Drain Tank
152V 101T 153V
706V
IAS 165V
PIC IAS
173V
P
PIC IAS
TIAH IAS TI Dial Type
TX
145B
I
715V
Control Air
To Clean Drain Tank
ORI-16 717V
From No.2 M/B (Desuperheated Steam)
IAS
To Atmos. Drain Tank
716V
PI
ORI-15 709V
PX
PIAH IAS
708V
704V
6.03/0.98 MPa Pressure Reducing Valve
144V
Pressure Reducing Valve
ORI-12
719V 6.03/0.32 MPa
To Clean Drain Tank
L.P Turbine
TI IAS
PX
720V
701V 6.03/0.98 MPa Pressure Reducing Valve
Key Superheated Steam Line Desuperheated Steam Line Condensate Line Air Line Drain Line
TI
Check Valve with Handle & Dash Pot
PI
Sett. 0.75 MPa
718V
To Atmospheric Drain Tank
PI IAS
To Deaerator
172V
Control Air IAS
Control Air
TX
To Safety Manifold
To Dump Steam System
Control Air
P
LX
(A)
To Deaerator & Distilling Plant
I
PX CI
121V
Sett. 0.75 MPa
PI
712V
TI Dial Type TIAH TX IAS 705V PIAH PX IAS PI
168V
P
146V 147V
PIC IAS
145B
IAS
S
TI IAS
1st Stage Feed Water Heater
IAS
To Safety Manifold
TI
363B
From No.1 M/B (Desuperheated Steam)
118V
130V
TI
3rd Stage Feed Water Heater
122V
119V
268B
L.X
ORI-11
248B Forced Draft PI Fan (246B) 365B 364B 365B
No.1 Steam Air Heater
No.1 Main Boiler Sealing Air
To be Fitted Reversely
PI
(For Initial Charge)
TI
TI
TI
To Distilling Plant
TI IAS S
LS
Control Air
S
Control Air
LS
T-703V
Warming Up System
Main Steam Supply From Main Boiler
Make-up From Distilled Water Tank
TX
120V
Forced Draft Fan (246B)
713V ORI-13
TI IAS
161V
Control Air
Air In
To Safety Manifold
Sett. 0.75 MPa
125V
116V
LS
248B Feed Fan Drive Unit
(Vent Line)
PI IAS
PI PX
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.1.3 Bleed System
pressure 1.1MPa or less, IAS will close HP close HP bleed steam valve (ST028 : 110V) automatically(Open side by operator control).
The part of the casing where the rotor extends through is provided with the metallic labyrinth packing to minimize the steam leakage from the casing and the air leakage into the casing. The high pressure turbine forward side gland pockets are connected, respectively in turn from the aft side, to the high pressure turbine exhaust chamber, the gland seal steam receiver and the gland leak-off condenser while the aft side gland pockets are connected to the gland seal steam receiver and to the gland condenser incorporated with main air ejector.
1. High Pressure Bleed System 5. IP Bleed System Steam IAS control The H.P bleed steam shut - off motor valve is opened by manual, to acknowledge bleed off point through press transmitter. The normal bleed steam pressure joins the general service & heating steam system, through auxiliary steam desuperheater. The H.P bleed motor valve opens at a pressure of 1.4MPa closes at 1.1MPa. The HP bleed motor valve can automatically be closed when bleed steam pressure is decreased to 1.1MPa. (Opening is only permitted in operator manual )
IAS
SP
PV
SP
PV
PID [Reverse]
OP
PID [Reverse]
Close Treatment
DC Low Monitor (less than 0.25 MPa)
OP
102V
PT To LP Turbine
2. Intermediate Pressure Bleed System
719V From Boiler
IP bleed steam is bled from the crossover pipe between the HP and LP turbine. The IP bleed steam shut - off motor valve is opened by manual, to acknowledge to bleed off point through press transmitter. The normal bleed steam pressure joins the 3rd stage feed water heater. The IP bleed motor valve opens at a pressure of 0.35MPa and closes at 0.25MPa. The IP bleed motor valve can automatically be closed when bleed steam pressure is decreased to 0.25MPa. (Opening is only permitted in operator manual ) 3. Low Pressure Bleed System LP bleed system is supplied directly to the 1st stage feed water heater. A control valve on the heater’s drain outlet maintains the level of the 1st stage feed water heater. The drains from the steam air heater are normally led through the 1st stage feed water heater, but they can be diverted directly to the atm. drain tank as well.
SP
PID [Reverse]
PV
SP
PV
PID [Reverse]
OP
711V
To Deaerator and Dist. Plant 100%
PT To Steam Air Heater
6.03/0.45 MPa Desuper Steam Press.
Valve Position 0% 0%
Control Output
100%
As figure IP Bleed system, regulate pressure of 6.03/0.32MPa desuperheated steam is done by manipulating one pressure reducing valves automatically in accordance with measured de-super steam reduce valve outlet pressure. One PID controller (ST021) with one output signal (ST023) is provided in IAS. Manual operation of control valve from IAS is available. The IAS provides one output signal to field elements (I/P converter). When PV increase, PID controller decrease OP and close control valve. In addition, when IP bleed steam pressure below 0.25MPa or less, IAS will close IP bleed steam valve (ST030:102V) automatically(Open side by operator control)
The low pressure turbine aft side gland pockets are connected, respectively in turn from the forward side, to the L.P. bleeder chamber, the gland seal steam receiver and the gland leak-off condenser, while the forward side gland pocket are connected to the gland seal steam receiver and to the gland leak-off condenser. The gland seal steam receiver is connected to the auxiliary steam system and the flash chamber whereby the auxiliary steam being supplied to the receiver during the no load or low load operation and being discharged to the flash chamber during the high load operation. 8. Main Turbine Gland Steam Pressure IAS Control IAS PID [Direct]
PV
PID [Reverse]
OP
SP
100% (20 mA) Manual Changeover
0 (4mA) 0
50
100%
0 (4mA) 0
50
100%
Out
DC
PT
Low Monitor (less than 1.1 MPa)
OP
Manual Changeover
100% (20 mA)
Out
Close Treatment
SP
OP
6. Bleed Steam System IAS Display
4. HP Bleed Steam IAS control IAS
PT
6.03/0.32 MPa Desuper Steam Press.
7. Main Turbine Gland Steam System
PT Gland Packing Steam Receiver
Manual Changeover
100%
PT
715V
From Boiler Desuperheated Steam
PT
PT
162V
To M/T HP Bleed Steam
Aux. External Desuperheater
6.03/0.98 MPa Comm. Steam Press.
PT
M/T Gland Steam Spill Valve
PT To Atomizing Steam for Main Boiler
707V
715V
100%
0% 0%
162V
100%
Valve Position
100%
0% 0%
Control Output
100%
To Main Condenser
100%
Valve Position
Control Output
0% 0%
M/T Gland Steam Make-up Valve
To 0.6 MPa Steam Service
6.03/0.98 MPa Aux. Steam Press.
707V
From 0.98 MPa Steam System
PT
110V
1.63/1.03 MPa Desuper Steam Press.
Valve Position
IAS is controlling two control valves by one controller to a main turbine gland steam pressure with split range function. There are two valves; make-up valve and spill valve, and one PID controller (MT025) controls these two valves. When PV increase, PID controller increase OP. while increasing of PID output signal from 0% to 50%, the make-up valve will be closing from 100% to 0%, and while increasing of PID output signal from 50% to 100%, will be opening the spill valve from 0% to 100%. Manual operation of the control valve from IAS is not available individually. In addition, as for the input signal used for control, dual sensor change processing is performed. The IAS provides two output signals to field elements (I/P converter).
Valve Position
Control Output
100%
0% 0%
Control Output
100%
As figure HP bleed system, regulate pressure of 1.63 / 1.03MPa de-super steam is done by manipulating one pressure reducing valves automatically in accordance with measured atomized steam reduce valve outlet pressure. One PID controller (ST007) with one output signal (ST008) is provided in IAS. Manual operation of control valve from IAS is available. When PV increase, PID controller decrease OP and close control valve. The IAS provides one output signal to field elements (I/P converter). In addition, when HP bleed steam
2-6
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.1.4a 0.6MPa Steam System
Main A/C
To Safety Manifold
Aux. A/C
TI
424V
Accommodation
402V 403V
405V
401V
From 0.98 MPa Steam
Control PX PX PI Air
To Clean Drain Tank
406V
Sett. 0.66 MPa
To Deck Scupper
404V
467V
TI
455V
No.2 Incin. Waste Oil Service Tank
G/T L.O. Settling Tank
445V
453V
TI
M.L.O. Settling Tank
466V
412V TI
Low Sulphur F.O. Tank(S)
Sett. 85°C
417V
No.1 L.O. Purifier Heater
Calorifier
427V 468V
413V
435V
(For 2nd Deck (S))
428V
431V
Sett. 85°C
No.2 L.O. Purifier Heater
L.O. Out
425V
471V
464V
L.O. Out
G/E L.O. Settling Tank
416V
H.F.O. Settling Tank (S)
(For Gen. Service 2nd Deck (P))
(For 3rd Deck (S))
448V
451V
Sett. 65 °C 430V 429V
Sett. 65 °C 438V 437V
TI
Low Sulphur F.O. Tank(P)
TI
486V 458V
432V
TI
AFT H.F.O. Bunker Tank (S)
441V
TI
Bilge Holding Tank
443V
442V
(For Tank Cleaning 4th Deck(P))
L.S.C.(Mid) for M/Cond.
447V L.S.C.(S) for S.W. Service & Ballast System
2-7
(For Sea Chest Steam Blowing)
(For Sea Chest Steam Blowing)
470V
H.S.C.(S) for M/Cond.
456V
H.S.C.(S) for S.W. Service & Ballast System
439V
421V
454V
449V
TI
(For Tank Cleaning Floor AFT)
450V
TX
H.F.O. Overflow Tank
(For 4th Deck)
409V
M.L.O. Sump Tank TIAH IAS
434V
420V
452V
TI
440V
433V
TI
Oily Bilge Tank
TI
H.F.O. Settling Tank (P)
457V TI
Bilge Primary Tank
TI
(A)
TI
(For Tank Cleaning Purifier Room)
TI
460V
TI
410V
Sludge Tank
S
No.2 Air Condition Unit for MSBR/ECR (AC-5)
459V
423V
ORI-19
TI
S
No.1 Air Condition Unit for MSBR/ECR (AC-6)
465V
463V
0.98/0.6 MPa I P P.R.V.
(For Tank Cleaning E/Casing)
422V
PIAL IAS
IAS
No.1 Incin. Waste Oil Service Tank
(For Sea Chest Steam Blowing)
446V
TI
AFT H.F.O. Bunker Tank (P)
F.O. Drain Tank
TI
Key Desuperheated Steam Line Condensate Line Sea Water Line Air Line Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA 2.1.4 0.6MPa Steam System
Machinery Operating Manual (5) 435V -
1. General Service Steam System Through the boiler internal desuper heaters a common pipeline is supplied with 6MPa desuperheated steam. The 6MPa boiler disuperheated steam pressure is reduced to 0.98MPa by a control valve (715V) and HP bleed steam pressure is reduced to 1.03MPa by control valve (162V). 1MPa steam pressure was generated by each system for reducing valves. And this steam is flowing to aux.steam external desuperheater. 1MPa steam pressure is reduced to 0.6MPa by external desuperheater. 0.6MPa steam is provided to FO tanks, LO tanks, heaters. So this steam is useful for heating of FO, LO, etc
3. 1.0 / 0.6MPa Steam System IAS Display
Calorifier heating
2) Accommodation (1) 422V - Main air conditioner unit - Aux air conditioner unit 2. 0.98 / 0.6MPa De-super Steam Press Control
The service steam is distributed as follows :
IAS
SP
1) Engine Room
PID [Reverse]
PV
OP
(1) 466V -
Manual Changeover
Sludge tank heating No.1 LO purifier heater No.2 LO purifier heater
To Air-con. Unit for MSBR/ECR
(2) 464V -
Oily bilge tank heating Main turbine LO sump tank heating Bilge holding tank Bilge primary tank
From 0.98 MPa Steam System
402V
PT
PT To Incine. W.O Service Tank
0.98/0.6 MPa Desuper Steam Press. 100% Valve Position
(3) 463V -
0% 0%
HFO overflow tank heating AFT HFO bunker tank (S) heating HFO settling tank (S) heating Low sulphur fuel tank (S) Main LO sett. tank FO drain tank heating For sea chest steam blowing
(4) 465V
Control Output
100%
Regulate pressure of 0.98 / 0.6MPa de-super steam is done by manipulating one pressure reducing valves automatically in accordance with measured de-super steam reduce valve outlet pressure. One PID controller (ST018) withone output signal (ST020) is provided in IAS. Manual operation of control valve from IAS is available. The IAS provides one output signal to field elements(I/P converter). When PV increases, PID controller decrease OP and close control valve. In addition, as for the input signal used for control, dual sensor change processing is performed by manually.
- AFT HFO bunker tank (P) heating - HFO settling tank (P) heating - Low sulphur fuel tank (P) - G/T LO sett. tank - For tank cleaning 4th deck(P)
2-8
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.2.1a Main Condensate System
63V
39V
61V To Distilled Water Tank
9V LS
To Astern Turbine Water Spray
53V
Condensate Line
TIAH IAS
LAH IAS
TI
20V
19V
TI
To Coaming Inside
(A)
For Air Vent
To Atmos. Drain Tank
To No.2 Distilling Plant D.S. Heater
6V
For Main Condensate Pump St-by Control
16V
(F) (F) Main Condensate Pump (110 m3/h x 95 MTH)
24V
17V
72V 2V
65V PI
To No.1 Distilling Plant D.S. Heater
23V
No.1 11V
SX
PI
5V
CI
46V
1V
PS PS
TI To Gauge Board
50V
(A) SIAH IAS
67V
G7
43V
TI
(F) (F)
No.2 30V
66V
No.1 Main Feed Water Pump
68V
Heat Exchanger
73V 4V
28V
(Make-up)
47V
TI TI
From No.1 Main F.W Pump
18V
Separator
3V
71V
27V
TI
Air Outlet
No.1 Vacuum Pump
PI
To Gauge Board
No.1 Distilling Plant (60 ton/day)
LX
CI
TI
TI
Heat Exchanger
34V
70V
G7 TI
FS FS FS LI
69V
15V
Temporary Screen
Gland Condenser
21V
No.2 Main Feed Water Pump
48V
No.2 Vacuum Pump
35V
12V
36V
Air Outlet
Separator
LS
From No.2 Main F.W Pump
TI TX
Main Condenser
FS
49V
Vent Top To be Arranged Above Main Feed W. Pump
For Vacuum Breaker
37V
IAS
To Boiler Chemical Feed Tank
I P
IAS
TI IAS
Control Air
P
To Boiler Water Analysis Unit (For Sampling)
Air Line Drain Line
TX
I
To Boiler Water Analysis Unit (For Cooling)
(A)
Control Air
Key
No.1 External Desuperheater
(60 Mesh)
S
TI
Control Air
22V
62V
Control Air
P
IAS PI
52V
TI TX
I
(60 Mesh)
(A)
TIAL IAS
1st Stage Feed Water Heater
55V
45V
54V
58V 57V 60V
No.2 External Desuperheater
PI
Control Air
51V
To Deaerator or Distilled Water Tank
59V
P
44V
I
To Water Seal Valves
From Condensate Drain Pump
2-9
Control Air
S
7V
8V
LS
10V
From Main Condensate Water System
To Main Condensate Dump Steam Desuperheating Chamber
Part 2 Machinery System
LNGC GRACE ACACIA 2.2 Condensate and Feed Water Systems 2.2.1 Main Condensate System 1. General Description The main condensate system, as part of the closed feed cycle, is the section concerned with the circulation of feed water from the main condenser to the main feed pumps via the deaerator. Exhaust steam from the main turbines, turbine generators, dump steam and other auxiliaries is condensed under vacuum in the sea water cooled main condenser.
Machinery Operating Manual Condensate water is supplied to following systems. - Spray water for No.1 and No.2 dump desuperheaters - Spray water for main turbine astern steam - Main condensate dump steam desuperheating chamber - Condensing water for Fresh water generator - To mechanical seal water for feed water pump
3. Main Condenser Level Control (IAS) IAS
Level Monitor/ Operation OP
100% (20 mA)
0% (4 mA) 0
The deaerator is a contact feed water heater, feed water deaerator and feed system header tank, providing a positive inlet head for the main feed pumps. Non condensables and associated vapours are drawn to the gland leak-off condenser and away through the fan.
100% (20 mA)
50
100%
0% (4 mA) 0
50
During the process of circulation from the main condenser to the main feed pump inlet, the condensate temperature is raised from approximately 33°C to 127°C. This increase is gained by the use of otherwise waste heat in the gland condenser, condensate cooled type fresh water generator..
The steam cycle is a dynamic system and variations in flow require condensate make-up or spill. The deaerator level is controlled by the spilling of excess condensate back to the distilled water tanks at deaerator high level signal, and by accepting make-up to the system from the distilled water tanks at low level signal. The unit is also fitted with a low-low level alarm. A sampling and analysis cooler permits the monitoring of the condensate before and after the deaerator. Hydrazine injection into the system is arranged prior to the main feed pump suction. 2. Capacities and Ratings
The glands of the two condensate pumps are water sealed to prevent air ingress, with a balance line returning to the main condenser from the highest points of the pump inlets in order to prevent the formation of flash steam in the service pump. The main condensate pump discharge pressure is alarm monitored, with lowlow pressure initiating change-over of the pumps. All valves from condenser outlet to main condensate pump inlet have condensate water sealed glands to maintain main condenser vacuum. The main condenser is a potential source of feed water contamination due to possible cooling sea water leakage. A sample point and salinity monitoring system continually check condensate quality in the combined pump discharge line. Condensate discharge flows through the condensate cooled type fresh water generator and the gland condenser. These units condense the distilled vapour from the fresh water generator and the vapour from the gland leak-off systems of the main feed pumps, turbine generator and main turbine. The drains produced flow through a U tube water seal to the atmo. drains tank. Air and other non-condensables are extracted from the gland condenser by the gland exhaust fan, which discharges to atmosphere. During ship operation, dump steam is produced by burning excess boil-off gas. This steam is desuperheated and dumped to the main condenser. A water spray is arranged in way of this exhaust to the main condenser.
Main Condenser: Cooling area :
HHI 3,290 m2
Main Condensate Pump: No. of sets: Model: Flow:
Shinko 2 EVZ130M 110m3/h
Deaerator: Type: No. of sets: Capacity:
Dong-Hwa Entec Spray Scrubber type 1 30m3
1st Stage F.W. Heater: Heat transfer area: Heat dissipation:
Dong-Hwa Entec 100 m2 2,037,199Kcal/h
Vacuum Pump: No. of sets: Model: Flow: Rotation:
N\ASH-Elmo KOREA 2 NASH-AT-1006 6.8m3/h Clockwise
2 - 10
Main Cond. Water Pump 1st Stage Feed Water Heater
100%
Re-circulation Valve
The condensate water is extracted by a main condensate pump and circulated through various heat exchangers before entering the deaerator which is located at a high point in the engine room. Water in the deaerator provides the main feed pumps with a positive suction head.
PV
Level Control Valve
LT Main Condenser
Open 100% Valve Position 0% Close 0% 100% (4 mA) (20 mA) Control Output
Regulate level of main condenser is done by manipulating two control valve automatically in accordance with measured main condenser level. One PID controller (MD006) with two output signals (MD007 & MD008) are provided in IAS with split range function. Manual operation of control valve from IAS is not available individually. The IAS provides two output signals to field elements (I/P converter) 4. Condensate Water System IAS Display
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.2.1a Main Condensate System
63V
39V
61V To Distilled Water Tank
9V LS
To Astern Turbine Water Spray
53V
Condensate Line
TIAH IAS
LAH IAS
TI
20V
19V
TI
To Coaming Inside
(A)
For Air Vent
To Atmos. Drain Tank
To No.2 Distilling Plant D.S. Heater
6V
16V
(F) (F) Main Condensate Pump (110 m3/h x 95 MTH)
24V
72V 2V
For Main Condensate Pump St-by Control
65V PI
To No.1 Distilling Plant D.S. Heater
23V
No.1 11V
PS PS
SX
PI
17V
CI
5V
1V
46V
SIAH IAS
TI To Gauge Board
50V
(A)
67V
G7
43V
TI
(F) (F)
No.2 30V
66V
No.1 Main Feed Water Pump
68V
Heat Exchanger
73V 4V
28V
(Make-up)
47V
TI TI
From No.1 Main F.W Pump
18V
Separator
3V
71V
27V
TI
Air Outlet
No.1 Vacuum Pump
PI
To Gauge Board
No.1 Distilling Plant (60 ton/day)
LX
CI
TI
TI
Heat Exchanger
34V
70V
G7 TI
FS FS FS LI
69V
15V
Temporary Screen
Gland Condenser
21V
No.2 Main Feed Water Pump
48V
No.2 Vacuum Pump
35V
12V
36V
Air Outlet
Separator
LS
From No.2 Main F.W Pump
TI TX
Main Condenser
FS
49V
Vent Top To be Arranged Above Main Feed W. Pump
For Vacuum Breaker
37V
IAS
To Boiler Chemical Feed Tank
I P
IAS
TI IAS
Control Air
P
To Boiler Water Analysis Unit (For Sampling)
Air Line Drain Line
TX
I
To Boiler Water Analysis Unit (For Cooling)
(A)
Control Air
Key
No.1 External Desuperheater
(60 Mesh)
S
TI
Control Air
22V
62V
Control Air
P
IAS PI
52V
TI TX
I
(60 Mesh)
(A)
TIAL IAS
1st Stage Feed Water Heater
55V
45V
54V
58V 57V 60V
No.2 External Desuperheater
PI
Control Air
51V
To Deaerator or Distilled Water Tank
59V
P
44V
I
To Water Seal Valves
From Condensate Drain Pump
2 - 11
Control Air
S
7V
8V
LS
10V
From Main Condensate Water System
To Main Condensate Dump Steam Desuperheating Chamber
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 5. Operating Procedures
6. Control and Alarm Settings
1) Check the system is ready for use. Start main sea water circulation pump through the main condenser.
IAS Tag No.
Description
Setting
2) Check the quantity of any condensate already in the condenser. If necessary, drain the condensate side of the condenser to the bilge to preclude any risk of feed contamination.
CN012
MAIN CONDSR OUT SAL. H
4PPM
CN011
MAIN CONDSR CONDST OUT TEMP H
70℃
CN033
GLAND CONDSR OUT TEMP H
55℃
3) Isolate the condenser level alarms from the condenser, drain the lines to prove clear, and return to service.
CN027
CONDST DRN PP OUT SAL. H
4PPM
4) Initial filling of the main condenser is by direct drop from the distilled water tanks through filling valve 5) Ensure the main condenser re-circulation valve is operational, inlet and outlet valves open, gland condenser bypassed, with drains and seal line to the main condenser. 6) Ensure that control air is supplied to all control valves in the system. Check the condenser level transmitter and level gauge are on line. 7) With both condensate pumps isolated, check for rotation by hand. Open one of the pump's suction, balance line and gland seal valves. Open the pump discharge valve and line to the salinity probe. 8) Start the pump and check its operation. 9) Check and start one main vacuum pump, bringing it into operation to raise the condenser vacuum. 10) Ensure the condenser level control valve is operating correctly. 11) Open the feed inlet to the gland condenser, vent off the unit, open the outlet valve and close the bypass and vent valves. 13) Open the astern water spray steam and dump steam water spray. 14) Open all valves on the second condensate pump, place it in stand-by mode. Check that the auto cut-in operation is working when opportune. 15) Check all seal water and condensate water lines to ensure that valves open correctly. 16) Continue to raise the main condenser vacuum, bringing into service the gland steam system.
2 - 12
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.2.2a Aux. Condensate Water System To Auxiliary Condenser
M-39V
TIAL IAS
1st Stage Feed Water Heater
TI TX
M-62V
TI
M-61V
IAS Duplex Pressure DPI Gauge
214V
107V 108V 109V
118V IAS
Control Air
From Main Condensate Pump
I
P
SIAH IAS
SX
104V
102V
(G)
ORI-14 134V
PI
No.2 CI
LS
LAH IAS
LS
LAL IAS
LS H.H
LIAHL IAS
No.1 CI
111V
105V
CI
PI
ORI-12 126V
101V
Condensate No.3 Drain Pump (40 m3/h x 85 MTH)
ORI-13 127V
103V
(A)
PI
For 2nd Cond. Drain Pump Start
(G) Atmospheric Drain Tank (8 m3)
LX
138V
106V
130V
(For Sampling)
Pump Start/Stop : 1st Pump : Manual Start 2nd Pump : Level Switch Start All Running Pump : Manual Stop
Atmos. Drain Tank Level Control Valve
M-16V
To External Desuperheater
Condensate Line Air Line Drain Line
Deaerator (30 m3)
Spill Valve
To Cold Start Feed Water Pump Suction
Key
LIAHL IAS
LX
133V
Temporary Flex. Hose
Reservoir
LX
PI
Control Air
P
Reservoir
PI
110V
129V
I
TI
215V
IAS
117V 116V 115V
114V Grease Extractor (80 m3)
M-829V
Bag Filter
P
Bag Filter
I
Control Air
M-63V
120V
To Auxiliary Feed Water Line For Main Boiler (For Boiler Water Filling)
IAS
M-22V
To Main Turbine Flash Chamber Make-up
Make-up Valve
Distilled Water Tank (P)
121V
113V
125V 124V
122V
Distilled Water Tank (S)
From Main Condensate Water System
119V
Steering Gear Room
LS H
Same Level
LS H
To Deck Scupper To Clean Drain Tank
2 - 13
Part 2 Machinery System
LNGC GRACE ACACIA 2.2.2 Aux.Condensate Water System 1. General Description Condensate from the auxiliary steam services is returned to the atm. drain tank for recirculation of the main cycle and drains water is pumped by the drains pump. Drains that are free of any possible contamination are led directly to the atm. drain tank. Other service line drains which have a potential for hydro-carbon and other contamination, are segregated and are only led to the atm. drain tank after suitable testing and inspection. This system operates in conjunction with the main condensate system, whereby the condensate from both systems join together before entering the deaerator. It is owing to the combination of both systems that the deaerator make-up and spill control valves operate. When the main recirculation cycle needs some water, the water from the distilled water tank enters the atm. drain tank via the make-up valve which is controlled by deaerator level signal. A direct line from the distilled water tanks to the main condenser permits the initial filling of the condenser. The atm. drain tank has three normal condensate drain pumps. The atmospheric water is pumped by the in-use pump, through the atmospheric water drain tank control valve 108V, which maintains the atmospheric water drain tank level. The pumps have a re-circulation line back to the atmospheric water drains tank, via an orifice plate, which ensures the pumps do not run dry. Should the tank level become high, then the second condensate drain pump will auto cut-in and stop again when the level returns to normal. The discharge from the drains pumps can be used for the initial filling of the main boilers by opening the valve, through the auxiliary feed line. Potentially contaminated drains pass through the engine room drains cooler, which is itself cooled as part of the fresh water cooling system. From the drains cooler, the condensate passes through an oil content monitor and finally to the atmospheric water drain tank. These drains are normally from steam used to heat bunker fuel, lube. oil purifiers, sludge tanks, deck steam machinery etc, where the drains have a greater chance of entraining oils and other impurities. The condition of the water after the drains cooler is monitored by an oil detection unit, which will initiate an alarm, should there be any contamination.
Machinery Operating Manual 4. 1st Stage Feed Water Heater Level Control
2. Capacities and Ratings Condensate Drain Pumps: Model: No. of sets: Flow:
Shinko EVZ70MH 3 40m3/h x 85 MTH
Grease Extractor: Model: No. of sets: Capacity:
RWO BFG 4F 1 80m3/h
IAS
PV SP
PID [Direct]
OP
3. Operating Procedures of Atm. Drain Tank System 1) Open the instrument air supplies to all control valves and level indicators. Stroke all valves to prove operation on local control. 2) Test the water in the distilled tanks for contamination and, when satisfactory, open the outlet valve on one of the tanks, ensuring that the outlet valve on the other is closed. 3) With the drain pumps isolated, check for free rotation by hand. Line up the valves on the pumps, ensuring that the pump and line recirculation valves to return water to the drain tank are open. 4) Open up the inlet and outlet valves on the grease extractor. 5) Ensure that the inlet and outlet valves to the make-up, spill and atm. drain tank level control valves are all open. 6) Allow the atm. drain tank to fill to normal level. When the level is reached, start up the in-use drain pump to discharge water to the deaerator.
1st Stage Feed Water Heater To Atmos. Drain Tank
Regulate level of 1st stage feed water heater is done by manipulating control valve automatically in accordance with measured 1st stage feed water heater level. One PID controller (FE001) with one output signal (FE002) is provided in IAS. Manual operation of control valve from IAS is available when PV increases, PID controller increase OP and open control valve. The IAS provides two output signals to field elements (I/P converter)
When the correct deaerator level is achieved, the spill valve should open to maintain this level. 7) When the system is operational, vent off the grease extractor element. 8) Check that the system is operating satisfactorily. Ensure that there is no water or air leakage. Check that the drain tank salinity probe is reading correctly. 9) As soon as operational conditions permit, function test the system high and low alarms and check the drains pump auto changeover operation. All such operations must be carried out with care and be closely monitored.
2 - 14
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.2.2a Aux. Condensate Water System To Auxiliary Condenser
M-39V
TIAL IAS
1st Stage Feed Water Heater
TI TX
M-62V
TI
M-61V
IAS Duplex Pressure DPI Gauge
214V
107V 108V 109V
118V IAS
Control Air
From Main Condensate Pump
I
P
SIAH IAS
SX
104V
102V
(G)
ORI-14 134V
PI
No.2 CI
LS
LAH IAS
LS
LAL IAS
LS H.H
LIAHL IAS
No.1 CI
111V
105V
CI
PI
ORI-12 126V
101V
Condensate No.3 Drain Pump (40 m3/h x 85 MTH)
ORI-13 127V
103V
(A)
PI
For 2nd Cond. Drain Pump Start
(G) Atmospheric Drain Tank (8 m3)
LX
138V
106V
130V
(For Sampling)
Pump Start/Stop : 1st Pump : Manual Start 2nd Pump : Level Switch Start All Running Pump : Manual Stop
Atmos. Drain Tank Level Control Valve
M-16V
To External Desuperheater
Condensate Line Air Line Drain Line
Deaerator (30 m3)
Spill Valve
To Cold Start Feed Water Pump Suction
Key
LIAHL IAS
LX
133V
Temporary Flex. Hose
Reservoir
LX
PI
Control Air
P
Reservoir
PI
110V
129V
I
TI
215V
IAS
117V 116V 115V
114V Grease Extractor (80 m3)
M-829V
Bag Filter
P
Bag Filter
I
Control Air
M-63V
120V
To Auxiliary Feed Water Line For Main Boiler (For Boiler Water Filling)
IAS
M-22V
To Main Turbine Flash Chamber Make-up
Make-up Valve
Distilled Water Tank (P)
121V
113V
125V 124V
122V
Distilled Water Tank (S)
From Main Condensate Water System
119V
Steering Gear Room
LS H
Same Level
LS H
To Deck Scupper To Clean Drain Tank
2 - 15
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 5. Atmos. Drain Tank Level Control
Main Feed Water Pump Turbine Panel
IAS
Regulate level of atmos. drain tank is done by manipulating control valve automatically in accordance with measured atmos. drain tank level. One PID controller (CN024) with one output signal (CN025) is provided in IAS. Manual operation of control valve from IAS is available when PV increases, PID controller increase OP and open control valve. The IAS provides two output signals to field elements (I/P converter)
Atomos. Drain Tank Level Control
Deaerator Level Control
SP
PID [Direct]
SP
PV
PID
OP
No.2 MFDWPT Trip ON at Trip
PV
OP No.1 MFDWPT Trip (Fast Alarm) ON at Trip
6. Deaerator Level Control Regulate level of deaerator is done by manipulating control two control valve automatically in accordance with measured deaerator level. One PID controller (CN028) with two output signals (CN031 & CN032) are provided in IAS with split range function. Manual operation of control valve from IAS is not available individually. The IAS provides two output signals to field elements (I/P converter). Output of the PID controller is calculated in accordance with the deviation between SP and PV as follows.
No.2 MFDWPT Trip (Fast Alarm) ON at Trip
LT
OP = 2.5 * (PV(%) – SP(%)) +50(%)
Deaerator
While increasing of PID output signal from 0% to 33.3%, the make up valve from100% to 0% will b closing, and while increasing of PID output signal from 66.7% to 100%, the spill valve from 0% to 100% will be opening. Moreover, if a deaerator level Lo-Lo signal is detected, main feed water pump turbine trip signal will be outputted to main feed water pump turbine panel. Consequently, main feed water pump turbine trip signal is inputted into IAS from main feed water pump turbine panel.
No.1 MFDWPT Trip ON at Trip
LS
LS
116V Spill Valve
Distilled Water Tanks 120V Make-up Valve
108V LT
Atmospheric Drain Tank
OP Calculation of CN028 100%
CN031
7. Control and Alarm Settings
0% -20%
Description
Setting
CN291
DEAERATOR LEVEL H/L
400/-400mm
CN030
DEAERATOR PRESS H/L
280/60kPa
FE013
DEAERATOR OUTLET TEMP L
120℃
Make-up
Spill
CN032
OP
OP
IAS Tag No.
100%
0 PV-SP (%)
100%
0%
33.3
66.7
100%
Cond. Drain Pump
2 - 16
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA
LS
LS
Sett. 9.56 MPa
873V
21B 853V
M
Inlet Header
No.2 Economizer
1B
BCP
822V
884V 827V
882V
894V
893V
30B
13B
FX
To Clean Drain Tank
I
821V
875V
20B 26B
IAS
FX
880V
3B
7B
P
IAS
1B
Control Air
P
26B 20B M
30B
IAS
8B
3B
7B Inlet Header
No.1 Economizer
13B
Outlet Header
TI IAS
TX
11B
PX ESA L
DLSS
To Clean Drain Tank
RWLI IAS
LI
TI For Boiler Test
11B
12B
PIC IAS
PX
4B
830V 831V
LS
Spray Water To Aux. Steam Desuperheater
No.2 Main Boiler
Water Drum
TX
TI IAS
PIC IAS
Steam SteamDrum Drum
Steam Drum
FWR
889V
21B 852V
6B
12B
To Clean Drain Tank
891V
5B
6B
4B
Sett. 9.56 MPa
Outlet Header
5B
For Boiler Test TI
TX
FWR
IAS RWLI
LS
DLSS
ESA L
LI
No.1 Main Boiler
Water Drum
817V 836V
TI
M-302V
For Boiler Initial Filling
214V
816V OR2
834V
No.2
829V
To Boiler Water Analysis Unit (Sampling Cooling)
From Condensate Drain Pump (For Boiler Water Filling) For FD. W. P/P
DPC PS8 St-by Control
No.1
Main Feed Water Pump (175 m3/h x 865 MTH)
Gauge Board G5 G5
To No.2 Sealing Water Control Valve
206V 208V
OR3 810V
For FD. W. P/P
DPC PS8 St-by Control
PI 815V
808V 807V
OR1
806V 805V
812V
811V
814V 813V
835V
To No.1 Sealing Water Control Valve
G4 G4
211V
0.9 MPa Speed Controller (2 Sets)
809V
213V
Control Air
CI
(60 Mesh)
Turbine Remote Control System
PI
Cold Start Feed Water Pump (6 m3/h x 250 MTH) 210V 21S
824V
LS
825V
Boiler Feed Water Pump Recirc. W. Shut-off Valve
Main Feed Water Line
804V 803V
PI
S
832V 833V
Auxiliary Feed Water Line
895V ORI-6
823V
818V
3rd Stage Feed Water Heater TI
From Chemical Feed Pump
826V
TIAL IAS
Level L-L For No.2 Main F. W. P/P Trip
202V
Level L-L For No.1 Main F. W. P/P Trip
201V
TI
PX
Deaerator (30 m3)
TI
Pressure Buffer Chamber (ERWS38 12.7T, 300A) ORI-21
CI
8B
I
886V
Control Air
PI
PIAHL IAS
To Clean Drain Tank
BCP
892V
From Auxiliary Condensate Water System
885V
M-114V
887V
Illustration 2.2.3a Boiler Feed Water System
TI
TI
2 - 17
Key Condensate/Feed Water Line Distilled Water Line Air Line Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
2.2.3 Boiler Feed Water System
is controlled by a loop, which measures and compares the steam drum pressure and common discharge pressure of the feed water pumps.
the auxiliary feed line, through valve (829V), which in normal operation is locked shut.
Discharge pipe configuration from the feed pumps is such that any one feed pump can supply either boiler or any services. Interconnecting pipelines between the pumps, isolated by non-return valves, are arranged to supply four common discharge lines.
Each boiler is fitted with a three term feed control system whereby signals from the actual boiler level, feed flow and steam flow are compared for feed pump operation.
1. General Description The boiler (or main) feed water system is concerned with the circulation of water from the deaerator via the feed pumps to the boiler steam drum. Feed water from the condensate systems enters the 3rd stage feed water heater and temperature of feed water is raised. The deaerator breaks the water into very small droplets, resulting in the liberation of air and any other non-condensable vapour. These, together with any associated water vapour, are drawn off to the gland condenser, where the water vapour is condensed and returned to the feed system and the noncondensable vapours are extracted to atmosphere by the gland condenser exhaust fan. The heated feed water is collected in the deaerator, which acts as a system header tank. The level is maintained in the deaerator by the automatic operation of the make-up and spill control valves in the condensate system. The location of the deaerator high up in the engine room provides the main feed pumps with a positive suction head of water. Hydrazine chemical is injected into the drop line to the main feed pumps to remove any remaining traces of oxygen in the feed water. The dosing of hydrazine is arranged to maintain a reserve amount in the boilers. A sampling line is fitted on the feed pump suction line to the boiler water analyser cooler. The water flows through a strainer before entering the feed pump suction manifold. Two main feed pumps ; one in use with the second unit on stand-by. The standby pump can be used if the duty pump fails. The stand-by pump will start automatically. The feed pumps are turbine driven, horizontal, multi-stage units. They have condensate cooled mechanical seals on the pumps. For initial start, each is fitted with an electric lubricating oil pump, but once running a shaft driven pump provides the lubrication oil circulating pressure. The electric lube. oil pump will stop automatically when the shaft driven pump delivers the correct pressure and prevents the feed pump bearings from running dry. The electric lubricating oil pump only provides oil pressure to lift the steam governor valve, and not as a back up to the shaft driven pump. (i.e. it does not supply sufficient oil to the bearings for full speed running)
Final feed into the boilers is through the economisers, where the feed temperature is increased from 145°C to 224°C. The economisers are placed in the path of the furnace flue gases in order to extract maximum heat from the waste gas before it passes out of the funnel. In case of an emergency, the water side of the economiser can be bypassed, and feed water is supplied directly to the boiler drum. Should this be necessary, steam flow must be restricted. In this case, the economiser should be drained and vented. 1) Main Feed Line From the main pump the feed water enters the common discharge line, at which point there is a signal line to the differential pressure unit for auto start of the stand-by unit on low pressure. The feed water passes through the feed water control valve (26B, closed at boiler high level), then through the orifice, which measures the feed flow for the control system. It then passes through the economiser and enters the steam drum of the boiler.
Similarly, each boiler is fitted with water level transmitters for the level detector and indicator alarm systems. 2. Capacities and Ratings Cold Start Boiler Feed Water Pump No. of sets: Model: Capacity:
Shinko 1 SK40MC 6m3/h x 250MTH
Turbine Driven Boiler Feed Water Pumps No. of sets: Model: Capacity:
Shinko 2 DMG125-3 175m3/h x 865MTH
3. 3rd Stage Feed Water Heater Level Control
IAS
PV SP
2) Auxiliary Feed Line This pipeline is usually used if the main line requires repairs, especially to the feed control valve or the flow orifice plate. The feed water can be directed through the economiser, or bypass it and flow directly into the boiler. Whichever path is selected, great caution must be taken when auxiliary feed is in use as the feed valve to the boiler is manually operated and must be attended at all times. The operator must maintain a careful watch on the boiler level in this mode.
3) Main Feed Pump Re-circulation Line An air operated control valve opens to allow the feed pumps to recirculate water back to the deaerator. When the boilers are operating at low loads with the main turbine in manoeuvring mode, this valve will open automatically, allowing water through an orifice on the pump into the water chamber at the bottom of the deaerator.
Air spaces between the pump and the bearings, and between the turbine and bearings, are fitted with drain passages to help prevent lubrication oil contamination.
For boiler filling and very low boiler loads, an cold start feed water pump is fitted. This unit is electrically driven, but like the main feed pumps will take its suction from either the deaerator or the main distilled water tanks and is able to discharge through the main or auxiliary feed lines to the boiler.
The running speed adjustment for the steam flow to the duty feed pump turbine
The discharge from the drain pumps for boiler filling is connected to
2 - 18
PID [Direct]
3rd Stage Feed Water Heater To Atmos. Drain Tank
Regulate level of 3rd stage feed water heater is done by manipulating control valve automatically in accordance with measured 3rd stage feed water heater level. One PID controller (FE003) with one output signal (FE004) is provided in IAS. Manual operation of control valve from IAS is available when PV increases, PID controller increase OP and open control valve. The IAS provides two output signals to field elements (I/P converter)
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.2.3a Boiler Feed Water System 15V
LS LS
Upper Deck
(F)
Key
V
Sea Water Line 16
M.G.P.S Line
(F )
EXP-W02 TI
TX
Drain Line
TI IAS
1SF
To Bilge, Fire & G/S Pump
TI
PI
EXP-W01
IAS
CI
(F)
M
7V CI
IAS
From M.G.P.S Anode Tank
M LS
(F)
IAS
2V
LS
(F)
M
1V
(F)
28V
M
LS
M
Auxiliary S.W Circ. Pump (6,000/4,500 m3/h x 5/8 MTH)
IAS
LS
29V
Shell
PI
(F)
From M.G.P.S Anode Tank
(F)
PI
Scoop Inlet LS
Main S.W Circ. Pump (6,000/4,500 m3/h x 5/8 MTH)
6V
To Clean Drain Tank
IAS
LS
5V
(F)
8V
25V
IAS
From Domestic F.W System
LS LS
Tank Top
LS
(F)
11V
M
TI
26V
Atmospheric Condenser
13V
LS
(F)
10V
21V
TI
12V
LS LS
LS
IAS
20V
For Flow Test
(F)
18V
Saw Dust Box (100 L) 19V
From Main C.S.W Pump Discharge
From M.G.P.S Anode Tank
EXP-W03
TX
22V
17V
TI IAS
M
(For M/Cond. Flushing)
Main Condenser
High Sea Chest (STBD)
(F)
Low Sea Chest (Mid.)
2 - 19
Part 2 Machinery System
LNGC GRACE ACACIA 4. Operating Procedures 1) Boiler Water Filling (Using cold start feed water pump) (1) Check that the steam and water drum drain valves are closed and that the local drum gauge glass and transmitters to remote level indicators are open, with their drain valves shut. (2) Open the drum and superheater vents fully. (3) Open the pump discharge valve to the auxiliary feed line, economiser bypass valve and direct feed valve to the steam drum. Ensure that the boiler drum feed valve from the main line is closed. (4) Check the pump suction valve, from the deaerator is locked shut and open the suction valve from the distilled water tank. (5) Line up recirculation piston valves . (6) Start the pump and commence filling the boiler. Maintain careful watch on local steam drum level gauges until the required level is achieved. Close the direct feed valve. (7) Open the feed inlet valve to the economiser and the vent valve, ensuring that the unit drain valves are closed. Open the auxiliary feed line valve to the economiser inlet. Continue using the pump until water emerges from the vent, having removed all air from the economiser.
Machinery Operating Manual 2) Placing Feed System in Use (1) During the initial flashing of the boilers, there should be enough steam to place the feed system in use when the pressure reaches approximately 2MPa. (2) Select the feed pump to be placed in use, and open the suction, discharge, recirculation, steam inlet, exhaust and gland leak-off valves. Open the turbine drains, and ensure that all trips are reset. (3) Open the drop valve from the deaerator and vent the pump to remove any air. (4) Supply air to the auto recirculation solenoid valve, checking that its inlet and outlet isolating valves are open. Due to ‘no flow’ conditions, the control valve should remain fully open. (5) Line up the valves on the main feed system to the selected boiler. Supply instrument air to the boiler feed control valve and under local control check its operation. If satisfactory, transfer to auto control. Ensure the motorised feed inlet valve to the boiler is open. (6) Check the lubricating oil sump for any water, and top up the sump to the required level using the correct grade of oil. Ensure that the Lubricating oil cooler is opened to the fresh water cooling system, and that the pump mechanical seals are supplied from the condensate system.
(8) Arrange for an initial chemical dosage charge to be injected into the boiler from the chemical dosage pump unit as the boiler is filling.
(7) Crack open the isolating valve from the superheated steam range to the feed pump and warm through the line. Drain any accumulated water by use of manual drains and open the electrically operated main steam stop valve.
(9) The boiler is now ready to flash.
(8) Open instrument air supplies to the control system.
Note If both boilers are out of service, then there are two other ways to initial fill them. (10) By filling the deaerator with the condensate pump, and allowing the water to directly drop through the emergency feed pump into the steam drum. (11) By using the condensate system, opening the valve, which is locked shut, and filling through the auxiliary feed line as described above.
(9) To start the feed pump, start the electric lubricating oil pump. This supplies oil to the oil relay cylinder, which lifts and raises the balanced governor steam valve off its seat, allowing steam into the turbine. As the feed pump rev/min increases, so the shaft driven Lubricating oil pump pressure is raised, at which time the electrically driven lube. oil pump stops. Close the turbine drains once any sign of entrained water droplets ceases. Note As the electrically driven lubricating oil pump does not supply oil to the bearings, only to the oil relay cylinder. Should the pump not start and run up to speed within approximately 30 seconds of the start process being initiated, the electric pump will stop and the feed pump will trip.
2 - 20
(10) Once the feed pump is running satisfactorily, and operating remotely with the boiler level being maintained at the correct level, thoroughly check the pump. Ensure that the oil flow through the line sight glasses, condensate flow through the sealed water line flow meters and the electrically driven oil pump have stopped. Monitor temperatures and pressures, and check for excessive vibration. (11) Line up the second feed pump as the stand-by unit and, when operational conditions permit, check the auto-change operation by tripping the duty feed pump. Note Though the feed pump manufacturers recommend the testing/checking of trip and safety functions on a regular basis, the testing of the overspeed trip should be done only when absolutely necessary. Damage to the pump internals may occur during the testing of the centrifugal speed governor and any test of this function must be carried out with due caution and in strict accordance with manufacturer's detailed instructions. 3) Filling Second Boiler (Main feed pump in use) Note During the filling of the second boiler, and in the transition period before it is brought fully on line, particular attention must be paid to the steaming boiler water level; constant checks must be made to ensure that it is not starved of feed water. (1) With the economiser bypassed, ensure that the steam drum vent valves are open and the drain valves on the steam drum, water drum and headers are closed. Check that the remote level indicators and the boiler gauge glasses are on line. (2) With the inlet valve to the water level control valve closed, open the auxiliary feed valve on the steam drum. (3) Using the manual auxiliary feed check valve, open it slowly until feed water is entering the boiler. As the boiler fills, maintain a careful check on the gauge glass, and that the in-use boiler level remains satisfactory and is not being starved of feed water. Using the boiler dosing unit, put in the initial chemical dosage as the boiler fills. (4) When the correct level in the boiler has been achieved, the auxiliary feed valves can be closed. (5) Prior to flashing the boiler, the economiser can be vented by filling through either the main feed line with the control valve manually opened, or through the auxiliary feed line.
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.3.1a Main Sea Water Circulating System 15V
LS LS
Upper Deck
(F)
Key
V
Sea Water Line 16
M.G.P.S Line
(F )
EXP-W02 TI
TX
Drain Line
TI IAS
1SF
To Bilge, Fire & G/S Pump
TI
PI
EXP-W01
IAS
CI
(F)
M
7V CI
IAS
From M.G.P.S Anode Tank
M LS
(F)
IAS
2V
LS
(F)
M
1V
(F)
28V
M
LS
M
Auxiliary S.W Circ. Pump (6,000/4,500 m3/h x 5/8 MTH)
IAS
LS
29V
Shell
PI
(F)
From M.G.P.S Anode Tank
(F)
PI
Scoop Inlet LS
Main S.W Circ. Pump (6,000/4,500 m3/h x 5/8 MTH) 6V
To Clean Drain Tank
IAS
LS
5V
(F)
8V
25V
IAS
From Domestic F.W System
LS LS
Tank Top
LS
(F)
11V
M
TI
26V
Atmospheric Condenser
13V
LS
(F)
10V
21V
TI
12V
LS LS
LS
IAS
20V
For Flow Test
(F)
18V
Saw Dust Box (100 L) 19V
From Main C.S.W Pump Discharge
From M.G.P.S Anode Tank
EXP-W03
TX
22V
17V
TI IAS
M
(For M/Cond. Flushing)
Main Condenser
High Sea Chest (STBD)
(F)
Low Sea Chest (Mid.)
2 - 21
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.3 Sea Water Systems 2.3.1 Main Sea Water Circulating Systems 1. General Description The main condenser is supplied with sea water cooling via the one main sea water circulating pump and aux. sea water circulating pump. The main & aux sea water circulating pumps take suction from the high sea chest (S) or low sea chest (MID), situated in the lower flat of the engine room. The draft of the vessel will decide which sea chest to use. The discharges from the pumps are connected together through valve 8V, 7V. The aux. condenser is also cooled by sea water. The sea water is supplied through the main sea water circulating pumps or aux. sea water circulating pump.
The main condenser has a back-flushing connection from the main SW circ. pump and aux. SW circ. pump system, which will enable the main condenser to be back-flushed if it becomes fouled with marine debris. In most operational conditions the marine growth prevention system will keep the condenser tubes in a clean condition.
5. Main Sea Water Circulation System IAS Display
2. System Capacities and Ratings Main SW Circ. Pump: No. of sets: Model: Capacity:
Shinko 1 CVF850M 6,000/4,500 m3/h x 5/8 MTH
Aux. SW Circ. Pump: No. of sets: Model: Capacity:
Sinko 1 CVF850LM 6,000/4,500 m3/h x 5/8 MTH
3. Preparation for the Operation of the Main SW Circulating System To ensure that the system is vented of air at all times, the main condenser water boxes and ship side sea chests have vent valves on them. These remain open and the pipelines lead to a gooseneck at the upper deck level. The aux. condenser outlet water box can be vented locally, with its valves closed after venting. The main circulating pumps are all vertical centrifugal pumps driven by electric motors. The main and atmospheric condensers are horizontal shell and tube heat exchangers, with the sea water passing through the tubes.
1) Ensure that the high (S) and low (MID) sea chests are vented. 2) Ensure all the pressure gauge and instrumentation valves are open and that the instrumentation is reading correctly. 3)
At the main sea water circulation graphic screen open the desired suction main line valve from the operating sea chest
4) Ensure that the main and aux. condenser water box are vented.
The main circulating pump discharge valves, main condenser sea water inlet and outlet valves are all hydraulically and electrically operated motorised valves, and can be operated from either the engine control room or from a local panel. Minor leaks in the main condenser can be plugged using sawdust.
The valves are now set to allow the main sea water circulating system to operate.
A sawdust injection unit is fitted for this purpose. The sawdust box is filled with sawdust and water from the sea water service system. It flushes the sawdust into the condenser sea water inlet line.
1) Ensure that the injection unit inlet and outlet valves are closed, and open the drain valve to prove that the unit is empty.
4. Operation Procedure for Condenser Sawdust System
2) Close the drain valve and remove the top cover of the unit. The vacuum from the condensate side of the tube stack will draw sawdust into any hole or crack in a tube. For the protection of the sea water pipelines in these systems, they are coated internally with PE or Rubber lining. Sea chests, sea water lines and all sea water cooled condensers are protected from environmental hazards by an anti-fouling system. The MGPS system prevents fouling in the sea chests and throughout the seawater system.
3) Fill with the required amount of sawdust and refit the top cover. 4) Open the unit outlet valve, and the inlet valve to the condenser sea water inlet line 5) Open the sea water service line inlet valve to the unit and allow several minutes to push the sawdust out of the unit and into the condenser. 6) Close all valves once the operation is complete.
2 - 22
6. Scoop Control Scoop system is prepared or transferring the cooling seawater for man condenser automatically. When the operator selects “SCOOP” mode and the shaft revolution is 57rpm or more and telegraph in “At Sea” position for more than 10min, the system uses scoop line valve. When scoop is used for main condenser cooling, the following function are provided. - Open MGPS injection valve to scoop inlet - Close both MGPS injection valves to High / Low sea chest The shaft revolution is 52rpm or less or telegraphs in “Maneuvring” position, then the system uses circulation pump and discharge valves. When main / aux. sea water circulation pump is used for main condenser cooling, the following function to be provided. - Close MGPS injection valve to scoop inlet - Open both MGPS injection valve to High / Low sea chest and MGPS injection valve to Low sea chest to be open at the same line When IAS starts a pump by auto start function or standby control function, IAS confirms close condition of discharge valve of the starting pump before output pump start order. (If the valve is not closed, IAS will close the valve automatically) and IAS will open the valve after pump start request. If IAS do not receive discharge valve close signal for 60seconds (adjustable) from the close order, the pump start request will be canceled in IAS. When IAS stops a pump by auto stop function or duty pump is tripped under remote position, IAS close a discharge valve of the stop/trip pumps automatically. When IAS stop pump by auto stop function, IAS confirm close condition of discharge valve of the stopping pump before output pump stop order. If IAS do not receive discharge valve close signal for 60 seconds(adjustable) fro the close order, the stop order the pump will be canceled in IAS. This function is available during remote position both circulation pump and discharge valve
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.3.1a Main Sea Water Circulating System 15V
LS LS
Upper Deck
(F)
Key
V
Sea Water Line 16
M.G.P.S Line
(F )
EXP-W02 TI
TX
Drain Line
TI IAS
1SF
To Bilge, Fire & G/S Pump
TI
PI
EXP-W01
IAS
CI
(F)
M
7V CI
IAS
From M.G.P.S Anode Tank
M LS
(F)
IAS
2V
LS
(F)
M
1V
(F)
28V
M
LS
M
Auxiliary S.W Circ. Pump (6,000/4,500 m3/h x 5/8 MTH)
IAS
LS
29V
Shell
PI
(F)
From M.G.P.S Anode Tank
(F)
PI
Scoop Inlet LS
Main S.W Circ. Pump (6,000/4,500 m3/h x 5/8 MTH) 6V
To Clean Drain Tank
IAS
LS
5V
(F)
8V
25V
IAS
From Domestic F.W System
LS LS
Tank Top
LS
(F)
11V
M
TI
26V
Atmospheric Condenser
13V
LS
(F)
10V
21V
TI
12V
LS LS
LS
IAS
20V
For Flow Test
(F)
18V
Saw Dust Box (100 L) 19V
From Main C.S.W Pump Discharge
From M.G.P.S Anode Tank
EXP-W03
TX
22V
17V
TI IAS
M
(For M/Cond. Flushing)
Main Condenser
High Sea Chest (STBD)
(F)
Low Sea Chest (Mid.)
2 - 23
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 7. Scoop Control Flow Chart
Spool Inlet Use
A : Auto : Scoop : Pump
Scoop
Auto
B
Pump & Valves Auto on Graphic
Scoop System Control Mode on Graphic
Circulation Pump Use
Auto
Low Sea Chest V. (VS1) Open
High Sea Chest V. (VS2) Open
Main Condr. CSW Out V. (VS15) Open
Man
Pump Man
Circulation Pump Auto Stop Treatment MGPS Scoop V. Shut Order (VS20) (Pulse Output Shut at Contact Close)
Scoop V. Open Order (Latch Output Open at Contact Close)
Auto
MGPS Scoop V. Open Order (VS20) (Pulse Output Open at Contact Close)
Manual operation is available from graphic display.
High Sea Chest V. (VS2) Open?
No
No
No
Scoop V. Open
No
No
MGPS VLV. Open Order (VS28) (Pulse Output Shut at Contact Close)
Yes
Circ. PP Disch. V. Open (VS8)
No
Circ. PP Disch. V. Open (VS7)
Yes
MGPS Scoop V. (VS20) Open No Yes
No
Shaft Rev. M/T Plate Over 57 rpm Mode 10 Min. Sea Mode Yes
Manuev.
Shaft Rev. No Over 57 rpm 10 Min. Yes
No
MGPS Pump V. (VS28) Shut
Main Circ. PP Stop
No
Yes
MGPS Scoop V. (VS20) Shut
Yes
Yes
No
No
No
Yes
Aux. Circ. PP Rum
No
Circulation Pump Auto Stop Treatment
MGPS VLV. Shut Order (VS28) (Pulse Output Shut at Contact Close)
Main Circ. PP Run Yes
Yes
Yes
High Sea Chest V. (VS2) Open?
Scoop V. Close Order (Latch Output Open at Contact Close)
Aux. Circ. PP Stop
MGPS Pump V. (VS28) Open Yes
MGPS VLV. Open Order (VS29) (Pulse Output Shut at Contact Close)
Yes
Yes
No
Shaft Rev. Below 52 rpm Yes
MGPS VLV. Shut Order (VS29) (Pulse Output Shut at Contact Close)
Auto Lamp is Illuminated on Graphic
No
Circ. PP Disch. V. Shut (VS8) Yes
No
No
Circ. PP Disch. V. Shut (VS7) Yes
Tn 80 Sec.
Yes
No
MGPS Pump V. (VS29) Open Yes
T1 200 Sec. No
Scoop V. Close
MGPS Pump V. (VS29) Shut Yes
T2 200 Sec.
.
A
B
Spool Inlet Use
Circulation Pump Use
Pump Lamp Flicker
Scoop Lamp Flicker
Scoop Running (Lamp is / Illuminated on Graphic)
Scoop Running (Lamp is / Illuminated on Graphic)
Scoop System Trouble Alarm (One-shot)
Scoop System Trouble Alarm (One-shot)
2 - 24
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.3.2a Cooling Sea Water Service System
PI
185V
178V
FI
(F)
PS PI
(F)
138V 176V (F) 180V (F) 181V (F)
FI
To High Sea Chest (For Scoop)
FI
To Scoop Inlet
FI
To Low Sea Chest (For Scoop)
From F.W Hyd. Unit D-57V
TI
Chemical Dosing Unit
109V
PI
Flowmeter
PX
(F) (F)
Em'cy Bilge Suction Line
No.1 Distilled Plant (60 Ton/day)
S
2 - 25
112V
107V
(F)
TI
111V
PX
PI
110V
(F)
LS
PI
PI
Flowmeter
LS
Chemical Dosing Unit
D-19V
S
From F.W Hyd. Unit
M
104V
106V
(F)
105V
(F) 174V
157V
(F)
115V
From IAS
(F)
120V
118V
(F)
135V
(F)
No.1
(F)
No.2
Ferrous Generator
(F)
CI
M
(F)
154V 153V
140V
FI
177V
No.2 Distilled Plant (60 Ton/day)
152V
Key Sea Water Line Fresh Water Line
(F)
108V
PI
Drain Line
(F)
137V
(F) (F) 173V
172V
155V (F)
TI
No.1
176V
PI PS TI
119V122V
125V
PI
(F) PI
To Saw Dust Box
PI
136V
114V
(F)
161V
TI
CI
No.1
(F) (F)
CI
PI
PI
117V121V
M.G.P.S Anode Tanks For Scoop System No.2 175V FI (F)
LS
Main Cooling Sea Water Pump (1,200 m3/h x 21 MTH)
PI
101V
TI
145V
146V
(F)
Distilled Plant Sea Water Feed Pump (90 m3/h x 43 MTH)
CI
PX
186V
(F)
149V
148V
134V
No.2 Vacuum Pump Heat Exchanger
(F)
150V
151V
No.2
143V TI
No.1 Vacuum Pump Heat Exchanger
144V TI
PI TI
PIAL IAS
(For Pump Control)
123V
(F)
170V
PI
(F)
(F)
From No.2 Fire, Bilge & G/S Pump Suction Line
(F)
TI
M.G.P.S Anodes To be Fitted
159V
156V
(F) CI
PS PS
(F)
168V
From IAS
139V
PI TI
158V
No.2
171V (F)
CI
No.1
PI
To Rudder Neck Bearing
169V
No.2 Gen. Engine Fresh Water Cooler
PX
(F)
TI
No.2 Main Central Fresh Water Cooler
PI
162V
163V
164V
(F)
TI
PI
No.1 Main Central Fresh Water Cooler
PIAL IAS
PS PS
PI
Low Sea Chest
Generator Engine S.W Cooling Pump (200 m3/h x 25 MTH)
160V
(For Pump Control)
(F)
(F)
166V
167V
165V
No.1 Gen. Engine Fresh Water Cooler
TI
LS
High Sea Chest
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.3.2 Cooling Sea Water Service System 1. General Description Other systems requiring sea water cooling services are supplied from the main cooling seawater pumps. These are vertical electrically driven centrifugal pumps, with one normally in use and the other on stand-by. The sea water suction to these pumps is from a common supply pipeline, which extends from the high sea chest to low sea chest. There is a remotely operated ship’s side butterfly valve on each sea chest which allows the sea water to enter a line simplex filter. Each sea chest has a vent valve which normally remains open, ensuring that the chest is flooded at all times. The outlet butterfly valve on each filter allows the unit to be isolated and cleaned periodically. The discharge from the two pumps is joined into a single pipeline system, which in turn allows for feeder lines to each unit requiring the cooling water. The sea water cooling system provides water to the following units: -
No.1 and No.2 main condenser vacuum pump coolers No.1 and No.2 central fresh water coolers No.1 and No.2 generator engine F.W coolers Fresh Water Generators Main condenser sawdust box Marine growth prevention system
After passing through the central fresh water and main turbine vacuum pump cooler units, the water is discharged overboard at a remotely operated ship side valve 152V. The central fresh water coolers are of the plate type design, one of which is normally in use, while the other is retained in a clean condition and ready for use when the other unit becomes dirty. There is a MGPS which protects cooling sea water system against fouling caused by seawater-borne organism, and the treated sea waters are led to whichever seachest is in use.
2. Capacities and Ratings
4. Aux. Cooling Sea Water System IAS Display
Main Cooling SW Pumps: No. of sets: Model: Flow:
Shinko 2 SVA400M 1,200 m3/h at x 21MTH
FW Generator: No. of sets: Type: Capacity: Salinity:
Alfa-Laval 2 Condensate Cooled Type Sea Water Cooled Type 60 t/day per unit 1.5 ppm(max)
Distilling Plant S.W. Feed Pump: Model: No. of sets: Flow:
Shinko SVA125-2M 2 90m3/h X 43MTH
3. Operating Procedures 1) Open the sea chest suction valve, to high or low suction, depending on vessel’s draft. This valve may be opened remotely, and an indicator light will show when fully open. Vent off the line suction strainer to prove full of water. 2) Select the pump to be used and, with the power off, ensure that the pump turns freely by hand. Open the suction valve to the pump. 3) Vent off the pump casing and ensure that it is flooded. 4) Check the central fresh water coolers and vacuum pump coolers to ensure that the drain valves are shut. Open the shipside valve for the cooler overboard discharge line. Ensure that the indicator light on the panel is on at fully open. 5) Select which vacuum pump and central fresh water cooler to use. Open the inlet and outlet valves. 6)
Start up the pump and, when rotating correctly, slowly open the discharge butterfly valve until fully open.
7) Check both of the in-use coolers, venting off at the outlet water boxes to ensure that no air is entrained in the units. Close the vent valves tightly.
The two F.W.G SW Feed Pumps also sucked sea water from No.2 fire, bilge & G.S pump suction line and supply to the each F.W.G.
2 - 26
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.3.3a MGPS System
No.1 Control Panel KCAF5070NM 8.8.
8.8.
8.8.
8.8. CU4
No.2 Control Panel KCAF5070NM 8.8.
8.8.
8.8.
8.8. CU4
CU1
CU2
CU3
CU1
CU2
CU3
8.8.
8.8.
8.8.
8.8.
8.8.
8.8.
CU5
AL1
AL2
CU5
AL1
AL2
1 Main Power 2 Anode Connection Cable 3 Anode Cable Tail 4 Cathode Cable Tail 5 Low Flow Alarm
NO.1 MGPS CONTROL PANEL
NO.2 MGPS CONTROL PANEL
6 Alarm AC 220V 60Hz, 1PH
1
5 2 2 2
6
JB1
Junction Box
4
AC 220V 60Hz, 1PH
1
3
5 2 2 2
6
JB1
Junction Box
4
3
Cu(Copper) Anode
Flow Meter
Cu1
Cu(Copper) Anode
Flow Meter
Cu3
Cu2
Cu5 Al1
Cu4
Cu1
Cu3
Cu2
Al2
Cu5 Al1
Cu4
Al2
Al(Alumintum) Anode 3
Al(Alumintum) Anode
4
3
4
JB2
JB2
No.1 Anode Treatment Tank
No.2 Anode Treatment Tank
2 - 27
Part 2 Machinery System
LNGC GRACE ACACIA 2.3.3 Marine Growth Preventing System 1. General Description
Machinery Operating Manual 3. Drain-Off operation : Turn off main power in control panel. Close inlet valve of anode tank and open drain valve and then remove hydroxide
There are two types known as the Marine Growth (CU) anodes and Trap Corrosion (AL) anodes. CU Anodes are manufactured from copper as major part systems. They release ions during electrolysis which combine with these released from the sea water to form an environment which discourages spat and any other minute organisms entering, and adhering in some area where they grow and start breeding. They are, instead, carried straight through to discharge and provided that no untreated water is allowed to enter at some point subsequent to the anodes, freedom from infestation is assured. AL Anodes are manufactured from aluminium as supplementary part for use in a system with predominantly steel pipes where the reaction of the aluminium anode with seawater results in the forming anti-corrosive barrier on the pipework which takes an insulation role preventing marine fouling from rooting and growing there. 1) Sea water to be treated : - 20,540 m3/h for scoop cooling system - 1,700 m3/h for general system 2) Anode location: - 5 CU x 2AL in each anode treatment tank (total two tanks) for scoop cooling system - 1 CU x 1 AL in each of 2 strainers for general system 3) Anode mounting type: Flanged mounting sleeve 4) Electric source : AC220V, 60Hz, 1PH 5) Power Consumption: Max.525 Watt each for KCAF5070NM Control Panel Max.180 Watt for KCAF3040NM Control Panel 2. Operation Procedure (Setting Up) Once the cables have been run and connected, the system is ready to be switched on. NOTE The following procedure can only by carried out with the anodes in seawater 1) Switch on the main power 2) Set all anodes currents by pressing the buttons unless the readings of digital display correspond to each current specified in operation manual 3) Switch off until ship starts engine up and switch on when sea water pumps are running
2 - 28
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.4a Centralised Fresh Water System Key Fresh Water Line
80V
Drain Line
TI
(A)
Main Central F.W Expansion Tank (1 m3) ORI-1
To Clean Drain Tank
70V
PI PS
TI
TI No.2 Main Air-Con. Condenser
89V PI PS
87V
No.1 Aux. Air-Con. Condenser PI PS TI No.2 Aux. Air-Con. Condenser
98V
PI PS TIAH IAS
TI No.1 Provision Refrigerant Condenser
TX
TIAH IAS
TI
TI
No.2 N2 Compressor (Oil Cooler)
No.1 N2 Compressor (Oil Cooler)
97V
No.2 N2 Generator (After Cooler) TI
No.1 N2 Generator (After Cooler) TI
17V
TX
TI
No.2 D/G Bearing TI L.O Cooler
84V
PI
No.1 Diesel Alternator
TI
16V
No.1 D/G Bearing TI L.O Cooler
25V
67V
TI
PI
No.2 Main L.O Cooler
TI
55V 68V
TI
(F)
PI
33V
65V
I.G Dryer Cooler
TI
TI
29V
35V
TI No.2 Main Air-Con. Unit for MSBD/ECR
TI
TI
136V
TIAH IAS
TX
IAS
TX I
P
TI
Aux. Central Cool F.W Boost Pump (150 m3/h x 30 MTH)
PI
No.2
No.1
CI
CI
2 - 29
118V
93V 8V
TI
(F) 10V
TI
PI
TI
PI
PI
(F)
TI
9V
(F)
2V
46V 13V
PIAL IAS
(F) 4V
PS
PI
No.2
PX
(F) 11V
PI
PS
6V
CI
PI
PI
Drain Cooler For Engine Room
37V
PX PS PS
114V
TI
TI
42V
To Auxiliary Central F.W Cooler
PS PI TI
92V
54V 66V
133V
131V
No.1 Main Air-Con. Unit for MSBD/ECR
(F)
TI
134V
132V
36V
137V
135V
TI
From Auxiliary Central F.W Cooler
(A) 115V
TI
To Clean Drain Tank
Water Chiller Unit Condenser
PS PI
TI
Stern Tube L.O Cooler
Chemical Dosing Tank (20 L)
44V
TI
TI
117V
3V
30V
(F)
126V
No.1 Feed Water Pump T/B L.O Cooler
Control Air
PI
No.1 Main L.O Cooler
TI
TI Unit Cooler For BLR Test Room
PI
TI
PI
No.1 Main Central F.W Cooler
No.2 Main Central F.W Cooler To Clean Drain Tank
Main Central Cooling Fresh Water Pump (1,100 m3/h x 30 MTH)
No.1 CI
Temporary Filter to be Removed After Flushing
(F)
TI
TI
39V
38V
52V 56V
PI
(F) 34V
(F)
(F)
1V
40V
TI
TIAH IAS
111V 81V
TI
TIAH IAS
112V
TI
TX
18V 26V
No.2 Provision Refrigerant Condenser
41V
TI
TI TX
No.2 Feed Water Pump T/B L.O Cooler
No.2 Diesel Alternator
TI
85V
PI PS TI
TX
No.2 Turbine Generator
53V 57V
(F)
TI
86V
No.1 Control Air Compressor
83V 82V
TI
43V
27V
TI
(F) TIAH IAS
88V
No.2 Control Air Compressor
58V 60V
TI TX
(F)
TI
TIAH IAS
74V
(F)
TI
Working Air Compressor
TI
No.1 Turbine Generator
(F)
(A) 90V
TI
79V
TI
45V
28V
TI
94V
TI
Unit Cooler for Workshop
75V
73V
12V
14V
TI
7V
TI
TI
TI
No.2 Gen. Turbine L.O Cooler
122V
(A) 91V
96V
No.1 Main Air-Con. Condenser
47V
95V
32V
15V
51V
To Deck Scupper
62V 64V
No.2 T/G Bearing L.O Cooler
(A)
PI PS TI
TI
(F)
TI
(F)
TI
76V
No.1 Gen. Turbine L.O Cooler
78V
LAL IAS
LS
TI
(F)
From F.W Hyd. Unit
129V
127V
72V
128V
107V
TI No.1 T/G Bearing L.O Cooler
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.4 Centralised Fresh Water Cooling System 1. General Description The fresh water cooling pumps supplies fresh cooling water throughout the engine room and cargo machinery area. There are two pairs of pumps set up identically as duty / standby pairs, and these are Main Central Cooling Fresh Water, Auxiliary Central Cooling FW Boost pumps The pumps are set up as a duty standby pair. Two pressure switches on the pumps common discharge line is used to start the standby and the duty pump will be stopped after a predetermined time. A standby start can also be triggered by duty pump failure. Duty pump failure includes unexpected loss of running and starter failure. Any standby start will call for an alarm. From a mimic panel, operators can start / stop the pumps as well as switching duty and standby. Pressing the “ON” button will automatically set both pumps to auto mode and the duty pump will be started. Pressing the “OFF” button will stop the running pump and switch both pumps to manual mode. When switching duty pumps, the standby will first start. When confirmed running, the duty will be stopped and the duty standby indication will be switched.
(2) (3) (4) (5)
Ensure that all system drain valves are closed. Open the inlet and outlet valves on the units to be cooled. Open the inlet and outlet valves on the cooler to be used. Open the suction and discharge valves on the CFW pumps, venting off casings to ensure that the units are flooded. (6) Start one of the pump CFW pump and check that it is operating normally. (7) Start the cooling fresh water pumps and check that it is operating normally. (8) Place each second pump in stand-by mode. (9) Stop each of the pumps in turn to prove that the auto cut-in operates correctly. (10) Check all systems for leaks, and that the operating temperature is normal. 2) Remotely: (1) Ensure the pump discharge pressure is correct and that the temperature is being maintained and observe that the temperature control valve is operating satisfactorily. (2) Start and stop the pumps at the remote position in the engine control room.
2. Capacities and Ratings 4. Central Cooling Fresh Water Temperature Control Main Central C.F.W. Pumps: No. of sets: Model: Capacity:
Shinko 2 SVA350M 1,100 m3/h X 30MTH
IAS
PV
PID [Reverse]
SP 36
OP
Aux. Central C.R.W. Booster Pump: No. of sets: Model: Capacity:
Shinko 2 SVA125M 150 m3/h X 30MTH
Central F.W. Coolers: No. of sets: Type : Heat Dissipation: Heat Transfer Area:
Alfa-Laval 2 Plate type 4,000,000 kcal/h 294.4 m2
5. Control and Alarm Settings IAS Tag No.
Description
Setting
FWC027SW
AUX. FW CLR OUT TEMP H
40℃
FWC032SW
D/G FW CLR OUT TEMP H
80℃
FWC012SW
M CENT FW CLR OUT TEMP H
40℃
DG015
DG 1 ALT A/C FW OUT TEMP H
45℃
DG081
G/E 1 BRG LO CLR FW OUT TEMP H
45℃
DG011
G/E 1 FW COOL OUTLET TEMP H
90℃
DG082
G/E 2 BRG LO CLR FW OUT TEMP H
45℃
DG016
DG 2 ALT A/C FW OUTLET TEMP H
45℃
DG012
G/E 2 FW COOL OUTLET TEMP H
90℃
TG094
1 T/G AIR CLR WTR TEMP H
45℃
TG096
2 T/G AIR CLR WTR TEMP H
45℃
Manual Changeover
3. Operating Procedures
Regulate temperature of central cooling fresh water is done by manipulating 3 way control valve automatically in accordance with measured central cooling fresh water outlet temperature. One PID controller (FWC012) with one output signal (FWC014) is provided in IAS. Manual operation of control valve from IAS is available. The IAS provides one output signal to field elements (I/P converter). When PV increases, PID controller decreases OP and changes to cooler use side. In addition, as for the input signal used for control, dual sensor change processing is performed by manually.
12V Fresh Water Cooler To M/T
1-TX-1/23 M/Cent. F.W. CLR Out Cont.
Central C.F.W. Pumps From Cargo Mach. C.F.W. Pumps
Ensure the main sea water service system is in use, with cooling sea water being provided to the fresh water coolers and both inlet and outlet valves to the cooler to be placed in use are open.
100% Valve Position
l) Locally:
0% 0% (4 mA)
(1) Ensure that all the vent air valves on the fresh water cooling system for return to the fresh water header expansion tank are open.
2 - 30
100% (20 mA) Control Output
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.5a Boiler Water Sampling and Treatment System
15B 16B
From Main Condensate Pump Discharge
From Auxiliary Condensate Water System
62B 61B Steam Drum Surface Blow-off Line
M-114V
From Main Feed Water Pump Discharge No.1 Main Boiler 65B 64B
67B 68B Water Drum
69B
303V
SF-6
SF-3 69B SF-4
69B
SF-5 69B
M-201V
66B SF-2
902V 904V Bottom ORI-17 Blow-off Line
66B SF-1 65B 64B
67B 68B Water Drum
901V 903V Bottom ORI-16 Blow-off Line
No.2 Main Boiler
LG
Chemical Feed Tank (150 L)
Chemical Feed Tank (150 L)
Hydrazine Mixing Tank (0.3 m3)
LG
15B 16B
LG
62B 61B Steam Drum
(3.5 L/H x 0.8 MPa)
2
M
1
2
M
1
(15 L/H x 8 MPa) PI
PI
PI
PI
TI
Boiler Water Chemical Injection Unit
N2H4 Injection Unit
TI
Sampling Cooler
LS
Sampling Cooler
LS
Sampling Cooler
LS
TI
FI
FI
FI
C
C
PH
PH
PH
TI
FI
FI
FI
PH C
C
302V
M-202V
Deaerator (30 m3)
Surface Blow-off Line
From Main Condensate Pump
To Boiler Feed Pump From Boiler Feed Pump Recirculating Line
To Atmos. Drain Tank
Boiler Water Analysis Unit
To Clean Drain Tank
Cooling Water From Main Condensate Pump Key Condensate/Chemical Feed Line Drain Line
2 - 31
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
2.5 Boiler Water Sampling and Treatment Systems
2. Water Specification: (boiler manufacturer’s figures)
1. General Description
NOTE The following information is given for general guidance only. Reference must be made to the specific instructions from the boiler chemical supplier regarding final data for chemical treatment of the boilers and feed water.
Chemical analysis and treatment of feed water is undertaken to prevent corrosion and scale formation in the main boilers and degradation of the steam quality. Inadequate or incorrect treatment can result in severe damage to the boilers, and constant monitoring is necessary to give an early indication of possible contamination of the feed water. Chemical treatment and analytical tests must be undertaken in accordance with the detailed instructions given by the chemical supplier and the water characteristics maintained within the ranges specified. Test results are to be recorded in a form that enables trends and the effect of treatment to be monitored. The dissolved solids in the boiler water are controlled by use of scum lines in the steam drum and/or water drum blow down valves in the water drum, through which these impurities are discharged overboard. These systems are an integral part of the boiler water treatment. The main water analyser unit has permanent sample lines fitted, which are led through coolers to permanent test meters. - No.1 Boiler water drum out - No.2 Boiler water drum out - Main feed water pump discharge - Main condensate pump discharge All the coolers use the fresh water cooling system as their supply.
Low boiler water pH may be the result of pollution by sea water or lack of adequate phosphate treatment. A return to the normal state is required at the earliest opportunity. A tendency for a rise in the boiler water analysis figures towards the maximum range, with the exception of hydrazine, may also be the result of contamination by sea water or insufficient blow down of the boilers.
3. Operating Procedures 1) Sampling The following information applies to whichever of the sample units is being used. (1) Check that the cooling water lines from the fresh water cooling system to the individual sampling coolers are open. Check the individual cooler outlet flow meters, to ensure that the correct amount of cooling medium is present. (2) Ensure the cooler outlet valve to the sensing units is closed, and open the by pass valve to the drain line to the scupper system.
Low or inadequate dosage of ammonia or neutralizing amine may cause a feedwater pH of 8.5 or less. This should be rectified at the earliest opportunity. Too high a dosage of ammonia or neutralizing amine, resulting in a pH in excess of 10, may not be detrimental to the steelwork in the system, though it is not recommended and system levels should be reduced into the range.
(3) Open the inlet valve to and outlet valve from the cooler, allowing the line to be tested to flow through the cooler. Allow several minutes to pass while the line is drained of any standing water, which may be present from previous use. Some of these lines cover large distances and must be allowed time to clear. Ensure that a water sample is taken of the water presently in the system.
Increase in hardness and/or sodium results from sea water contamination, and should be rectified as soon as possible. Iron contamination is a result of too low a pH and/or excess dissolved oxygen. If the oxygen level increases, the source of contamination is to be located and rectified as soon as possible and hydrazine dosage increased until the feed water content returns within limits.
(4) Check the thermometer in the line to ensure that the sample is at the correct temperature. A sample taken while the temperature is too high may not be tested satisfactorily, as the test chemicals themselves are only rated at certain temperatures.
Contamination by organic matter cannot be rigorously defined, as potential contaminants are diverse. Any source of oil contamination must be identified and isolated as soon as possible, with the use of the scum valves on the drain inspection tank used to clear any accumulation found in the tank.
The hydrazine injection unit provides a continuously metered supply of hydrazine into the feed pump suction line. The hydrazine is used as an oxygen scavenger in the system. The unit consists of a tank, which is filled with a mixture of distillate water supplied from the main condensate pumps and hydrazine compound. They are mixed in the tank using an agitator, and the resulting mix is injected into the feed line through either of the two pumps supplied. The stroke of these pumps can be adjusted to give correctly metered amounts into the system.
1) Boiler Water Characteristics
The boiler chemical dosage unit consists of two tanks, normally one for each boiler. Chemicals are poured into the tanks and mixed by an agitator before being injected into the boiler steam drum through its chemical injection valves. The pumps are of a reciprocating type and their stroke can be adjusted to meter the time the chemical takes to enter the boiler. Should one pump become faulty, it is possible to use the other pump to inject to either boiler. The pumps have a non-return valve on their discharge side to prevent boiler pressure being present in the tank. Any blockage in the system will cause the relief valve on the discharge side of the pumps to lift, returning the chemicals back into the tank.
2) Feed Water Characteristics
Normal
pH @ 25°C Conductivity Total dissolved solids Chlorides Phosphates Silica
9.6~10.3 ≤ 400 µS/mm 0.01ppm
2 - 32
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.5a Boiler Water Sampling and Treatment System
15B 16B
From Main Condensate Pump Discharge
From Auxiliary Condensate Water System
62B 61B Steam Drum Surface Blow-off Line
M-114V
From Main Feed Water Pump Discharge No.1 Main Boiler 65B 64B
67B 68B Water Drum
69B
303V
SF-6
SF-3 69B SF-4
69B
SF-5 69B
M-201V
66B SF-2
902V 904V Bottom ORI-17 Blow-off Line
66B SF-1 65B 64B
67B 68B Water Drum
901V 903V Bottom ORI-16 Blow-off Line
No.2 Main Boiler
LG
Chemical Feed Tank (150 L)
Chemical Feed Tank (150 L)
Hydrazine Mixing Tank (0.3 m3)
LG
15B 16B
LG
62B 61B Steam Drum
(3.5 L/H x 0.8 MPa)
2
M
1
2
M
1
(15 L/H x 8 MPa) PI
PI
PI
PI
TI
Boiler Water Chemical Injection Unit
N2H4 Injection Unit
TI
Sampling Cooler
LS
Sampling Cooler
LS
Sampling Cooler
LS
TI
FI
FI
FI
C
C
PH
PH
PH
TI
FI
FI
FI
PH C
C
302V
M-202V
Deaerator (30 m3)
Surface Blow-off Line
From Main Condensate Pump
To Boiler Feed Pump From Boiler Feed Pump Recirculating Line
To Atmos. Drain Tank
Boiler Water Analysis Unit
To Clean Drain Tank
Cooling Water From Main Condensate Pump Key Condensate/Chemical Feed Line Drain Line
2 - 33
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
2) Boiler Compound Injection Unit Chemicals are injected into the boiler steam drum, under its water level. This is done so the natural water circulation system within the boiler will move the chemicals around the boiler and ensure an even distribution. (1) With all valves on the unit closed, open the drain valve and ensure the tank is empty of any water or previous chemicals. Then close the drain valve. (2) Put the chemicals in the tank and fill the unit with water provided from the main condensate line. Use the agitator to ensure the chemicals are well mixed with the water. (3) Open the two chemical injection valves on the boiler. (4) Open the pump suction and discharge valves and start the pump. Once running, adjust the stroke of the pump as required to allow the chemicals into the boiler over a period of time. (5) On completion, close all the valves and drain the tank. 3) Boiler Blow Down Boiler blow down, through the valves on the water drum, imposes a considerable load on the unit, and must only be undertaken with the boiler in low load conditions. If in port, the duty deck officer should be contacted, to ensure the discharge from the ship’s side will not be dangerous. (1) Open the ship’s side valve and double shut off valve fully, 901V, 903V No.2 boiler, 902V, 904V No.1 boiler. (2) Slowly open the master blow down valve fully, 65B port, 65B starboard side and crack open the intermediate valve 64B port, 64B starboard side. Adjust the intermediate valve to control the blow down rate. (3) As the blow down process is continuing, continually monitor the boiler water level and ensure this is being maintained and the feed pump discharge is coping with the extra load. (4) On completion, close the intermediate and master blow down valves, then the ship’s side valve. Note More frequently boiler impurities are discharged overboard via the scum valves on the steam drum. As this line is relatively small in diameter, this system can be used with the boiler on higher loads.
2 - 34
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.1a Fuel Oil Bunkering and Transfer System
From/To M.D.O Bunker Station
Key Fuel Oil Line
F.O/M.D.O Drain From Bunker Station Upper Deck
Diesel Oil Line
IAS
62V
Air Line
Em'cy G/E M.D.O Tank
Drain Line Em'cy G/E Room
87V IAS
From Incinerator M.D.O Service Tank Overflow
Return From I.G.G M.D.O Pump
IAS
29V
LIAHL IAS
M.D.O Storage Tank (100 m3)
26V
27V
To I.G.G M.D.O Pump
37V
LX
H.F.O Settling Tank (P) (540 m3)
LIAHL IAS
TX
TIAH IAS
LS
For H.F.O Transfer Pump Auto Stop
58V
For H.F.O LIAHL Transfer IAS Pump Auto Start TIAH IAS
LX TX LS
IAS
75V
LS
57V Low Sulphur F.O Tank (P) (293.2 m3)
46V
68V 52V
LX TX
LIAHL IAS
TIAH IAS
12V
(A)
3S
(A) 25V
CI
34V
(A)
(A) 39V
48V
Incinerator M.D.O Service Pump (2 m3/h x 0.25 MPa) PI
To Main Boiler
F-203V
13V
77V
20V LX
19V
F-297V F-204V
28V
G/E M.D.O Service Tank (30 m3)
4SG
LX
LS
(Air Vent/Overflow)
LIAHL IAS
36V
To Incinerator M.D.O Service Tank
35V
18V Near I.G.G. M.D.O Service Tank
88V
IAS
Near G/E M.D.O. Serv. Deck
2SG
LX
78V
59V
H
73V
LS
44V
For M.D.O Transfer LS H Pump Auto Stop
1SG
LIAHL IAS
AFT H.F.O. Bunker Tank (P) (353.5 m3)
17V
Sett. 0.5 MPa
LS
I.G.G M.D.O Service Tank (70 m3)
3V
2V
IAS
16V
71V
LS
(Air Vent/Overflow)
(Overflow)
84V
Sett. 0.33 MPa
30V
To M.D.O Purifier
From M.D.O Purifier
(A)
10V 1ST
3SG
DPI-I Duplex DPI Pressure 50V Gauge
53V 66V
14V
From I.G.G F.O Pump Coaming Drain
56V To Main Boiler
F-298V
2S (32 Mesh)
76V
LS
49V
1S (32 Mesh)
(A)
F.O Additive Tank (3.0 m3)
CI CI
32V
83V
From G/E F.O Service Pump Coaming Drain
PI
Near 3rd Deck
F-202V
From Boiler F.O Burner Coaming Drain
IAS
PI 2SF H.F.O Transfer Pump (50 m3/h x 0.4 MPa)
(A)
From Incinerator M.D.O Service Tank Coaming Drain
9V
M.D.O Transfer Pump (30 m3/h x 0.45 MPa)
11V (32 Mesh)
43V
IAS
74V
CI
H.F.O Settling Tank (S) (535.5 m3)
LAHH IAS
TIAH IAS
LS For H.F.O Transfer Pump Auto Stop
55V
For H.F.O LIAHL Transfer IAS Pump Auto Start TIAH IAS
LX TX
89V LS
6V
F.O Additive Dosing Pump (2 m3/h x 0.3 MPa)
From Boiler F.O Burner Coaming Drain 8V
PI
IAS
45V
4S 81V
LS
TX
H
F-201V
21V
LX
Low Sulphur F.O Tank (S) (205.7 m3)
82V LAH IAS
7V
LS
41V
LS
H.F.O Overflow Tank (70 m3)
F.O Drain Tank (1.0 m3)
LAH IAS
1V
4V IAS
23V
51V
LS
72V
AFT H.F.O. Bunker Tank (S) (462.2 m3)
54V LX
LIAHL IAS
86V To Oily Bilge Tank
65V
2 - 35
TX
TIAH IAS
To/From H.F.O Bunker Station
Part 2 Machinery System
LNGC GRACE ACACIA 2.6 Fuel Oil and Fuel Gas Service Systems
Machinery Operating Manual each bunker tanks level high limit switch activated the bunker tanks filling valves are automatically closed.
2.6.1 Fuel Oil Bunkering and Transfer Systems 1. General Description
Drains from save-alls around equipment using either heavy fuel oil or diesel are led to the fuel oil drains tank, where a level alarm will sound to indicate a leak in the system.
Normally, fuel oil is supplied to the boilers from the settling tanks, in which the fuel oil is allowed to stand for 24 hours. Any entrained water is allowed to settle out and is drained from the tanks to the fuel oil drain tank through a spring loaded self-closing valve. The settling tanks are kept filled as necessary by transferring oil from the bunker tanks, using the engine room fuel oil transfer pump. The transfer pumps can take suction from any of the fuel oil tanks, and discharge to any of them as well as to the main deck. The marine diesel oil transfer pump can also be used to transfer diesel oil to the main deck and D.O service tank, and in case of emergency it can be used to transfer heavy fuel oil after changing over spectacle flanges. However, great care should be taken if doing so to prevent contamination of the diesel oil system by heavy fuel oil. The MDO transfer pump can take suction from the MDO storage tank and discharge to the main deck line and IGG DO service tank and G/E MDO service tank
The suction valves from the bunker and settling tanks are fitted with remotely operated quick closing valves. These can be closed from a remote fire station. After being operated they have to be reset manually. All storage tanks, both heavy fuel oil and diesel oil, are fitted with a float type air vent pipe with flame screens to prevent tank pressurization. The engine room fuel oil transfer pump can be used in auto mode, where a low level switch in the fuel oil settling tank will initiate the pump to run and a high level switch will cause the pump to auto-stop. 2) Diesel Oil System (1) Marine Diesel Oil system supplies fuel to: - Incinerator - Boiler when in cold condition - Diesel generator engine - IGG - Emergency G/E
MDO Transfer Pump: No. of sets: MODEL: Capacity:
Taiko 1 HG-35MAB 30 m3/h x 0.4MPa
The settling tanks each have a control valve to maintain a fuel oil temperature. All the lines to and from the tanks have steam tracing to maintain line temperatures.
Incinerator MDO service Pump No. of sets: MODEL: Capacity:
Taiko 1 WL-4M 2 m3/h x 0.25MPa
Overflows from settling tanks are led to the overflow tanks. When the
FO Additive Dosing Pump:
Taiko
The two aft bunker tank, two low sulphur fuel tank and settling tanks are steam heated, .
(1) Put steam heating on the aft fuel tanks and ensure the temperature is raised for easy pumping. (2) Ensure blinds are fitted to manifold valves and that valves are closed. Open the deck line valves and inlet valves on tanks to be filled. (3) Ensure the aft tank filling valves are closed and open the pump discharge valve. (4) Open the suction, discharge valves of the pump, ensuring that the line is filled by testing the vent valve on the suction filter. (5) Start the pump with the relief/bypass valve partly open and, once oil is flowing, set the valve to give optimum discharge pressure. (6) Have personnel inspecting the line throughout transferring, ensuring that there is no leakage and that they are able to stop the transfer immediately should any problems occur. (7) As the transfer continues, continuously monitor the levels in the forward fuel tank as well as the tanks being filled. 4. Fuel Oil Transfer System IAS Display
2. Capacities and Ratings Taiko 1 VG-50MAB 50 m3/h x 0.4MPa
All the fuel oil pumps (transfer and service) are gear type driven by electric motors.
3. Operating Procedure
MDO storage tank, G/E MDO service tank and IGG MDO service tank are fitted with high level alarms, with any overflow going to the fuel oil overflow tank.
H.F.O Transfer Pump: No. of sets: Model: Capacity:
The Incinerator MDO service pump can take suction from the G/E MDO service tank and discharge to the Incinerator MDO service tank and emergency G/E MDO service tank.
1 NHG-2.5MAB 2 m3/h x 0.3MPa
1) To Transfer Fuel Oil from H.F.O Settling Tank
1) Boiler Fuel Oil System The AFT HFO tank (P) (capacity 353.5 m3) , AFT HFO tank (S) (capacity 462.2 m3), Low Sulphur FO Tank(P)(capacity 293.2 m3 ), Low Sulphur FO Tank(S)(capacity 205.7m3 ), are situated on either side of the engine room. The two settling tanks are located above their respective bunker tanks, HFO Settling Tank(P) (Capacity 540 m3 ), HFO Settling Tank(S) (Capacity 535.5 m3 ).
No. of sets: Model: Capacity:
2 - 36
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.1a Fuel Oil Bunkering and Transfer System
From/To M.D.O Bunker Station
Key Fuel Oil Line
F.O/M.D.O Drain From Bunker Station Upper Deck
Diesel Oil Line
IAS
62V
Air Line
Em'cy G/E M.D.O Tank
Drain Line Em'cy G/E Room
87V IAS
From Incinerator M.D.O Service Tank Overflow
Return From I.G.G M.D.O Pump
IAS
29V
LIAHL IAS
M.D.O Storage Tank (100 m3)
26V
27V
To I.G.G M.D.O Pump
37V
LX
H.F.O Settling Tank (P) (540 m3)
LIAHL IAS
TX
TIAH IAS
LS
For H.F.O Transfer Pump Auto Stop
58V
For H.F.O LIAHL Transfer IAS Pump Auto Start TIAH IAS
LX TX LS
IAS
75V
LS
57V Low Sulphur F.O Tank (P) (293.2 m3)
46V
68V 52V
LX TX
LIAHL IAS
TIAH IAS
12V
(A)
3S
(A) 25V
CI
34V
(A)
(A) 39V
48V
Incinerator M.D.O Service Pump (2 m3/h x 0.25 MPa) PI
To Main Boiler
F-203V
13V
77V
20V LX
19V
F-297V F-204V
28V
G/E M.D.O Service Tank (30 m3)
4SG
LX
LS
(Air Vent/Overflow)
LIAHL IAS
36V
To Incinerator M.D.O Service Tank
35V
18V Near I.G.G. M.D.O Service Tank
88V
IAS
Near G/E M.D.O. Serv. Deck
2SG
LX
78V
59V
H
73V
LS
44V
For M.D.O Transfer LS H Pump Auto Stop
1SG
LIAHL IAS
AFT H.F.O. Bunker Tank (P) (353.5 m3)
17V
Sett. 0.5 MPa
LS
I.G.G M.D.O Service Tank (70 m3)
3V
2V
IAS
16V
71V
LS
(Air Vent/Overflow)
(Overflow)
84V
Sett. 0.33 MPa
30V
To M.D.O Purifier
From M.D.O Purifier
(A)
10V 1ST
3SG
DPI-I Duplex DPI Pressure 50V Gauge
53V 66V
14V
From I.G.G F.O Pump Coaming Drain
56V To Main Boiler
F-298V
2S (32 Mesh)
76V
LS
49V
1S (32 Mesh)
(A)
F.O Additive Tank (3.0 m3)
CI CI
32V
83V
From G/E F.O Service Pump Coaming Drain
PI
Near 3rd Deck
F-202V
From Boiler F.O Burner Coaming Drain
IAS
PI 2SF H.F.O Transfer Pump (50 m3/h x 0.4 MPa)
(A)
From Incinerator M.D.O Service Tank Coaming Drain
9V
M.D.O Transfer Pump (30 m3/h x 0.45 MPa)
11V (32 Mesh)
43V
IAS
74V
CI
H.F.O Settling Tank (S) (535.5 m3)
LAHH IAS
TIAH IAS
LS For H.F.O Transfer Pump Auto Stop
55V
For H.F.O LIAHL Transfer IAS Pump Auto Start TIAH IAS
LX TX
89V LS
6V
F.O Additive Dosing Pump (2 m3/h x 0.3 MPa)
From Boiler F.O Burner Coaming Drain 8V
PI
IAS
45V
4S 81V
LS
TX
H
F-201V
21V
LX
Low Sulphur F.O Tank (S) (205.7 m3)
82V LAH IAS
7V
LS
41V
LS
H.F.O Overflow Tank (70 m3)
F.O Drain Tank (1.0 m3)
LAH IAS
1V
4V IAS
23V
51V
LS
72V
AFT H.F.O. Bunker Tank (S) (462.2 m3)
54V LX
LIAHL IAS
86V To Oily Bilge Tank
65V
2 - 37
TX
TIAH IAS
To/From H.F.O Bunker Station
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA (8) When the receiving tank is at the required level, stop the transfer and close all valves on the pump and tanks. Check all tank levels, and record amounts transferred and received.
5. Control and Alarm Settings IAS Tag No.
Description
Setting
FO016
(P) A HFO BUNK TK LEVEL H
15.97m
FO015
(P) A HFO BUNK TK TEMP H
80℃
FO029
(P) F HFO BUNK TK LEVEL H
15.97m
FO031
(P) F HFO BUNK TK TEMP H
80℃
FO022
(P) LOW SULPHUR FO TK LEVEL H/L
15.97/0.5m
FO025
(P) LOW SULPHUR FO TK TEMP H
80℃
(2) Vent off any air at the pump suction filter.
FO008
(P) HFO SETT TK LEVEL H/L
15.97/0.5m
(3) Start the pump and monitor the service tank filling.
FO007
(P) HFO SETT TK TEMP H
80℃
FO013
(S) A HFO BUNK TK LEVEL H
15.97m
FO014
(S) A HFO BUNK TK TEMP H
80℃
FO028
(S) F HFO BUNK TK LEVEL H
15.97m
FO030
(S) F HFO BUNK TK TEMP H
80℃
FO023
(S) LOW SULPHUR FO TK LEVEL H/L
15.97/0.5m
2) Diesel Oil Transfer from MDO storage tank to G/E MDO service tank (1) Open the following valves: - G/E MDO Service tank filling valve
34V
-
Quick closing valves from the storage tank
27V
-
Pump suction valve
32V
(4) On completion, stop the pump and close all valves. Note and record the quantities transferred with current tank levels. 3) Diesel Oil Transfer from MDO storage tank to IGG MDO service tank (1) Open the following valves: - IGG MDO Service tank filling valve
78V
FO024
(S) LOW SULPHUR FO TK TEMP H
80℃
-
Quick closing valves from the storage tank
27V
FO006
(S) HFO SETT TK LEVEL H/L
15.97/0.5m
-
Pump suction and discharge valves
32V, 25V
FO001
(S) HFO SETT TK TEMP H
80℃
MDO005
DG MDO SEV TK LEVEL L
0.45m
MDO001
MDO STORAGE TK LEVEL H/L
10.65/0.45m
(2) Vent off any air at the pump suction filter. (3) Start the pump and monitor the service tank filling. (4) On completion, stop the pump and close all valves. Note and record the quantities transferred with current tank levels.
2 - 38
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.2a Diesel Oil Purifying and G/E Fuel Oil System
Key Diesel Oil Line
Near G/E M.D.O Service Tank Top
Air Line Drain Line
126V
From M.D.O Storage Tank
102V
DPI
S
(A)
127V
11S (60 Mesh)
Control Air
To Boiler F.O Pump Suction
140V
128V
Near 2nd Deck
(A)
101V
Finned Tube Pipe (100A)
G/E M.D.O Service Tank (30 m3)
(A) FI IAS
104V
FI
133V
No.1 Generator Engine (Hyundai-B&W Model : 7L27/38)
12S
CI
PI
(F) (32 Mesh) M.D.O Purifier Supply Pump (3 m3/h x 0.3 MPa)
Running in Filter
PIAL MC
114V
129V
130V
105V
103V
141V
131V
132V
(F) LM
DPS
PX
MM
M.D.O Purifier (3,000 L/H)
111V
Fuel Leakage Alarm Box
LAH MC
G/E M.D.O Service Pump (2.88 m3/h x 0.4 MPa)
106V
Fuel Leakage Alarm Box
LS
(A) PI
118V
No.2
CI
(A)
LAH MC
LS
138V
(A) 121V
PX
PS 109V
115V
IAS DPS
143V
PIAL MC
122V
120V Running in Filter
123V
No.2 Generator Engine (Hyundai-B&W Model : 7L27/38)
CI
124V
PI
136V
LS
137V
Sludge Tank (10 m3)
(A) No.1
To F.O. Drain Tank
To Oily Bilge Tank
2 - 39
To F.O Drain Tank
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.6.2 DO Purifying and G/E Fuel Oil System 1. General Description The purifier feed pump can take suction from the storage tank and service tank, which, after the purification process, discharges to the diesel oil service tank. Waste oil from the purifier flows into the fuel oil sludge tank, under the base of the purifier. The sludge pump can pump this tank out. Excess line pressure in the system is protected by a spring-loaded regulating valve, which re-circulates the oil back to the return chamber. Both service and storage tank suction valves are of the spring-loaded, quick closing type, and can be operated remotely should an emergency situation arise.
4. Diesel Generator Fuel Oil System The operation of the diesel generator should be done in conjunction with the manufacturer’s instruction manual. The following outlines the use of the fuel system. 1) Open the quick closing valve (101V) on the service tank to the generator engine. 2) Check the line suction filters and vent off any air at the cock, ensuring they are closed on completion. 3) Open the inlet (103V) and outlet (104V) valves to the counter/flow meter. 4) Open the following valves:
2. Capacities and Ratings M.D.O. Storage Tank: G/E M.D.O. Service Tank: Sludge Tank:
100 m3 30 m3 10 m3
M.D.O. Purifier Supply Pump: No. of sets: Model: Capacity:
Taiko 1 NHG-4MAB 3m3/h x 0.3MPa
M.D.O Purifier: Model: Type:
Samgong SG20G Automatic Self-Cleaning Total disch. 1 3000L/h
No. of sets: Capacity:
- Service pump suction and discharge valves - Duplex strainer in use inlet and outlet valves - D/G inlet and return line valves 5) Start the generator engine and monitor the differential pressure across the suction filters, as well as the spill line pressure. 6) Check the flow meter and counter is operating correctly. 5. D/G Fuel System IAS Display
3. Operating Procedure of Purifier System The operation and running of the diesel oil purifier should be undertaken with reference to the manufacturer’s instruction manual. 1) Open and set the storage tank suction line quick closing valve (27V) to the purifier inlet. MDO service tank suction line quick closing valve (126V) 2) Open the inlet line suction valve to the filter and vent off to ensure that the line is flooder DO open the purifier discharge valve to the service tank. 3) Run up the purifier as per manufacturer’s instructions and ensure that the service tank level is rising. 4) Monitor the purification process. Set up the cut-out process of the purifier on the service tank level and check that the unit stops when the required level is reached. Test the purifier alarms to prove that all are operational.
2 - 40
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.3a Boiler Fuel Oil & Fuel Gas Service System
F-3V
217B
TI TX
Plug 278V
F.O Temp. TS Low Trip
222B
LS
239V
232B 220B 240V
GD
BCP I
P
238V
216B
Control Air
204V (A)
211V
212V
(A)
To H.F.O Transfer Pump 298V
Duplex Pressure Gauge
F-46V
205V
F-43V
F-14V
F-66V
207V
F-68V
297V
F-13V
208V
209V
No.1 221V
Low Sulphur F.O Tank (P) (293.2 m3)
(A)
210V
213V
214V No.2 (A)
222V
TI
IAS
191B 191B
PI
Low Sulphur F.O Tank (S) (205.7 m3)
190B
194B
201V
260V
FX
TI
245V
Drain Valve & Press. Gauge to be Provided on Each Strainer
IAS
252B
Control Air
To F.O Heater Temperature Control Valve
214B 214B
LS
[Boiler Hood Room] 237V
226V
22S (60 Mesh) 227V
Temperature Control TIALH IAS
F.O Chamber
281V FI (A) 283V
DPI
F-1V
To H.F.O Transfer Pump
229V
AFT H.F.O. Bunker Tank (S) (462.2 m3)
232V (A) 233V (A)
To F.O Drain Tank
Key Fuel Oil Line Methane Vapour Line Nitrogen Line Air Line
PX
2 - 41
DPAH IAS
DPX
H.F.O Settling Tank (S) (535.5 m3)
Differential Press. Gauge
228V
Viscosity Control
TX
IAS
TI
202V
LS
LS
211B 208B
194B
No.1 Boiler F.O Heater (193B)
L
190B
223V
DPX
PI
No.2 Boiler F.O Heater (193B)
ESA IAS
261V DPX
218B
LS
H
Gas Detector
282V
220V
Control Air 264V
LS
LS
DPI
For Performance Monitor
Viscorator
LS
From Seal Air Fan
LS
Boiler F.O Service Pump (12.6 m3/h x 2.8 MPa)
(A)
LS
223B
LS
TI
236V
225B
No.3 Burner
216B
LS
TX
TX
234V
214B 214B
217B
Gas header (300A)
LS
From Seal Air Fan
Boil-off Gas
TI IAS
PX
ESA IAS
265V
258V
213B
LS
Base Burner
PIAHL IAS
262V
216B 223B
BCP
TX
LS
375B 217V
PX
Pump Change Over PS
224V
LS
215V
DPS
BCP
LS
Furnace 259V
TIAHL IAS
214B 214B
217B
IAS
225B
NG-76 NG-75
From N2 Generator
287V 289V
LS
From Seal Air Fan
TX
PI
380B
21S (60 Mesh)
TI
216V
203V
296V
263V
No.2 Burner
PX
IAS
267V 269V
LS
PS TX
PI
H.F.O Settling Tank (P) (540 m3)
From G/E M.D.O Service Tank
CI
PI
PAL IAS
253V
PIAHL IAS
ORI-23
(Burner Coaming)
223B
L
PX IAS
ORI-22
225B
ESA IAS
295V BCP
ORI-29
257B 224B
H
Furnace
To F.O Drain Tank
No.2 Main Boiler
CI
ESA IAS
FI
IAS
273V
For Safety for Gas Temp. TS Low Trip
LS
P
218V 215B 219V
212B
213B
207B PIAHL IAS
DPX
LS
257B 204B
TIAHL IAS
277V
I
For Performance Monitor
272V DPX
207B
PX
ORI-27
(Burner Coaming)
ORI-24
PX
TIAHL IAS
212B
221B PIAL IAS
From Seal Air Fan
TX
ORI-25
390B
PI
274V
ORI-26
189B 189B
221B
PI
PS
216B
LS
390B
PS
270V
LS
213B
PX
LS
218B
276V
223B
No.1 Main Boiler
257B 204B
217B
LS
LS
LS
214B 214B
213B
PIAL IAS
257B 224B
LS
ORI-28
LS
LS
FX
ORI-21
From Seal Air Fan
214B 214B
217B 216B
LS
252B
LS
Gas header (300A)
223B
Control Air
IAS
208B
213B
From Seal Air Fan
No.2 Burner 225B
LS
213B
LS
LS
211B
216B
LS
Base Burner 225B
214B 214B
217B
223B
247V
G-33V
GD
No.3 Burner 225B
LS
PX
Extraction Fan (60 m3/min. x 40 mmAq)
No.1
To No.4 Vent Riser
Gas Detector
TX TI
IAS
No.2 SF-2
F.O Temp. TS Low Trip TIAHL IAS
231V
284V
FI 286V (A)
243V
AFT H.F.O. Bunker Tank (P) (353.5 m3)
F.O Return Pipe (250A)
230V IAS
285V
G-34V
241V
291V 290V
Control Air
293V 292V
220B
P
271V
LS
242V
AFT Side Wall
BCP I
To H.F.O Transfer Pump
SF-1
222B
232B
275V
279V
Plug
PIAL IAS
Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA 2.6.3 Boiler Fuel Oil Service Systems
Machinery Operating Manual
1. General Description
Each boiler burner system has a recirculating valve opened when all the burners are extinguished and closed when the burner operation is initiated, to stop fuel from passing through the recirculation line to the pump suctions.
Fuel oil is normally supplied to the three burners of each boiler from either of the two fuel oil settling tanks, by one of the two fuel oil service pumps.
When total (No.1 and No.2) FO flow is less than 900kg/h or either boiler is gas mode, the return valve (237V) is opened.
Diesel oil may be used for flushing through lines or for flashing the boilers from cold when no heating steam is available. The fuel oil service pump takes suction from the in-use settling tank, through a manually cleaned suction strainer. The strainer has a differential pressure alarm fitted and care should be maintained to have a positive suction pressure at all times. One pump will be running with the other on auto-start stand-by, in case the discharge pressure from the in use pump falls.
At each burner, there are two solenoid-operated valves (225B, 223B). These form a double shut off when the burner is not in use. Also fitted to the line is another solenoid operated valve which opens for a set time when the burner is first taken out of use, and allows steam to pass through the burner, preventing any fuel in the line from turning to carbon and blocking the burner. The boilers are tripped in an emergency by valves (222B). 2. Capacities and Ratings
The fuel oil passes through a flow meter and counter, from which the consumption can be calculated, and then to the pump suctions and each boiler suction. The pumps are electrically driven horizontal rotary type, with auto-start change-over. The system pressure is controlled by a recirculation valve 237B, which allows oil to re-circulate to air separator, and maintains a constant set pressure. The pressure is set as part of the automatic combustion control system. The oil then passes through the fuel oil heaters, normally one of which is in use, with the other clean and ready for use Temperature control is by means of a viscometer, which measures the viscosity of the oil and, from its signal, opens or closes the steam valve to the heaters to alter the temperature. The viscosity value is set at the control station, with temperature and viscosity signals from after the FO heater being compared with the set point. On the fuel inlet rail, both boilers have the same arrangements after passing through a flow meter. There are three valves placed in parallel to each other, and the oil is able to pass through a choice of them as follows:
F.O Service Pump: No. of sets: Type: Flow:
MHI 2 Horizontal Screw 12.6 m3/h x 2.8MPa
F.O Heater: No. of sets: Type: Capacity:
MHI 2 Shell & Tube 50/150℃
F.O Viscosity Controller: No. of sets: Type:
VAF Instrument B.V 1 Diff. Press. & Pneumatic
3. Operating Procedures 1) Supplying fuel oil to boiler. It is assumed steam has been raised using diesel oil, with all inlet and outlet valves to pumps and heaters open.
- The minimum fuel pressure keeping valve (232B) will be open to maintain the boiler flame even when the steam load is in an extremely low condition.
(1) When sufficient steam pressure is raised on a boiler to supply the desuperheater system, commence supplying steam to the heating coil of the settling tank to be used. Open the heating coil drains valve to the bilge and the steam inlet valve. Check the drains for contamination and, if they are satisfactory, open the outlet valve to the drains cooler and close the valve to the bilge.
- A bypass valve (240V, 243V), which allows fuel oil to bypass the other valves. It can also be used for emergency boiler operations, for instance, when the flow control valve is out of order.
(2) As the temperature rises, check the tank for water. The temperature would normally need to be around 50°C for good pumping conditions.
- At all steam loads except minimum fuel demand from the boilers, the oil will pass through the fuel oil flow control valve (220B) to the rail.
2 - 42
(3) Commence supplying steam to the in-use fuel oil heater. As above, open the drains to the bilge until it is certain they are uncontaminated, and then open them to the engine room drains cooler. Use the steam temperature control bypass valve to allow steam through the system slowly. (4) As diesel fuel will be in the system, with the fuel oil pump taking suction from the diesel oil service tank and diesel oil storage tank, ensure that the temperature in the heater does not rise above 50°C. (5) When the line temperature rises to approximately 80°C, close the valve 207V, and open the valve of the heavy fuel oil system 205V (6) As the heavier fuel oil purges the system of diesel oil, the system pressure will rise. Care should be taken to manually control the pump back pressure, and maintain it at a suitable level. The fuel oil heater inlet steam valve should be opened further to bring the line temperature to over 100°C, for good combustion. (7) As the boiler was flashed using diesel oil, air will have been supplied as the atomizing medium at the burner. Continue to use the air for this purpose until the system has been cleared of diesel oil. Caution At no time should atomizing steam be used in conjunction with diesel oil when flashing the boiler. Explosions with resultant injuries and damage could occur (8) Open the atomizing steam valves on the 1.0MPa line from the boiler desuperheater steam system. Open manually the atomizing steam valves on the burners not in use, and allow any condensation in the lines to be blown through. When it is certain that no water remains in the lines, slowly open manually the valves to the base burner, and shut off the atomizing air supply. (9) With the base burner now being supplied by fuel oil with atomizing steam, the boiler pressure can continue to be raised as the fuel pressure is increased. (10) Start the viscorator unit, and shut the unit bypass valve. As the viscosity reading rises to coincide with the fuel oil line temperature, set the control value, place the unit on automatic, and allow the temperature to be on auto-control. (11) Check and inspect all systems for leaks. Ensure all bypass valves are closed, and that flow meters at the suction filter, and at the boiler fuel rail for the automatic combustion control system are operating.
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.3a Boiler Fuel Oil & Fuel Gas Service System
F-3V
217B
TI TX
Plug 278V
F.O Temp. TS Low Trip
222B
LS
239V
232B 220B 240V
GD
BCP I
P
238V
216B
Control Air
204V (A)
211V
212V
(A)
To H.F.O Transfer Pump 298V
Duplex Pressure Gauge
F-46V
205V
F-43V
F-14V
F-66V
207V
F-68V
297V
F-13V
208V
209V
No.1 221V
Low Sulphur F.O Tank (P) (293.2 m3)
(A)
210V
213V
214V No.2 (A)
222V
TI
IAS
191B 191B
PI
Low Sulphur F.O Tank (S) (205.7 m3)
190B
194B
201V
260V
FX
TI
245V
Drain Valve & Press. Gauge to be Provided on Each Strainer
IAS
252B
Control Air
To F.O Heater Temperature Control Valve
214B 214B
LS
[Boiler Hood Room] 237V
226V
22S (60 Mesh) 227V
Temperature Control TIALH IAS
F.O Chamber
281V FI (A) 283V
DPI
F-1V
To H.F.O Transfer Pump
229V
AFT H.F.O. Bunker Tank (S) (462.2 m3)
232V (A) 233V (A)
To F.O Drain Tank
Key Fuel Oil Line Methane Vapour Line Nitrogen Line Air Line
PX
2 - 43
DPAH IAS
DPX
H.F.O Settling Tank (S) (535.5 m3)
Differential Press. Gauge
228V
Viscosity Control
TX
IAS
TI
202V
LS
LS
211B 208B
194B
No.1 Boiler F.O Heater (193B)
L
190B
223V
DPX
PI
No.2 Boiler F.O Heater (193B)
ESA IAS
261V DPX
218B
LS
H
Gas Detector
282V
220V
Control Air 264V
LS
LS
DPI
For Performance Monitor
Viscorator
LS
From Seal Air Fan
LS
Boiler F.O Service Pump (12.6 m3/h x 2.8 MPa)
(A)
LS
223B
LS
TI
236V
225B
No.3 Burner
216B
LS
TX
TX
234V
214B 214B
217B
Gas header (300A)
LS
From Seal Air Fan
Boil-off Gas
TI IAS
PX
ESA IAS
265V
258V
213B
LS
Base Burner
PIAHL IAS
262V
216B 223B
BCP
TX
LS
375B 217V
PX
Pump Change Over PS
224V
LS
215V
DPS
BCP
LS
Furnace 259V
TIAHL IAS
214B 214B
217B
IAS
225B
NG-76 NG-75
From N2 Generator
287V 289V
LS
From Seal Air Fan
TX
PI
380B
21S (60 Mesh)
TI
216V
203V
296V
263V
No.2 Burner
PX
IAS
267V 269V
LS
PS TX
PI
H.F.O Settling Tank (P) (540 m3)
From G/E M.D.O Service Tank
CI
PI
PAL IAS
253V
PIAHL IAS
ORI-23
(Burner Coaming)
223B
L
PX IAS
ORI-22
225B
ESA IAS
295V BCP
ORI-29
257B 224B
H
Furnace
To F.O Drain Tank
No.2 Main Boiler
CI
ESA IAS
FI
IAS
273V
For Safety for Gas Temp. TS Low Trip
LS
P
218V 215B 219V
212B
213B
207B PIAHL IAS
DPX
LS
257B 204B
TIAHL IAS
277V
I
For Performance Monitor
272V DPX
207B
PX
ORI-27
(Burner Coaming)
ORI-24
PX
TIAHL IAS
212B
221B PIAL IAS
From Seal Air Fan
TX
ORI-25
390B
PI
274V
ORI-26
189B 189B
221B
PI
PS
216B
LS
390B
PS
270V
LS
213B
PX
LS
218B
276V
223B
No.1 Main Boiler
257B 204B
217B
LS
LS
LS
214B 214B
213B
PIAL IAS
257B 224B
LS
ORI-28
LS
LS
FX
ORI-21
From Seal Air Fan
214B 214B
217B 216B
LS
252B
LS
Gas header (300A)
223B
Control Air
IAS
208B
213B
From Seal Air Fan
No.2 Burner 225B
LS
213B
LS
LS
211B
216B
LS
Base Burner 225B
214B 214B
217B
223B
247V
G-33V
GD
No.3 Burner 225B
LS
PX
Extraction Fan (60 m3/min. x 40 mmAq)
No.1
To No.4 Vent Riser
Gas Detector
TX TI
IAS
No.2 SF-2
F.O Temp. TS Low Trip TIAHL IAS
231V
284V
FI 286V (A)
243V
AFT H.F.O. Bunker Tank (P) (353.5 m3)
F.O Return Pipe (250A)
230V IAS
285V
G-34V
241V
291V 290V
Control Air
293V 292V
220B
P
271V
LS
242V
AFT Side Wall
BCP I
To H.F.O Transfer Pump
SF-1
222B
232B
275V
279V
Plug
PIAL IAS
Drain Line
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA (12) Open all master valves on fuel and steam lines to other burners. These can now be operated from the control panel as required.
(7) Change to the second fuel oil heater to ensure that this is also flushed through.
2) To Circulate Fuel to Second Boiler It is assumed that one boiler is already on line, using fuel oil and atomizing steam.
(8) Stop the in use pump, allowing the stand-by unit to be in use, and flushed through.
(2) Open the instrument air supply to the fuel flow control valve.
(9) After a few minutes, shut down one boiler. The action of stopping the burner opens each burner rail recirculation valve, and allow it to recirculate for a short time. After a few moments close the main fuel oil shut off valve to the fuel oil rail. Do not leave the diesel oil recirculating to the boiler for longer than necessary, as the diesel oil will be recirculating to the fuel oil settling tank.
(3) Open the inlet and outlet valves to the rail flow meter, and reset the emergency shut off valve, allowing fuel oil to the control valves.
(10) Repeat operation for the second boiler, when steam supply is no longer required.
(4) With boiler ACC control on manual mode, slowly open the fuel oil control valve until pressure is noted in the rail. Ensure that the fuel oil pressure on the in-use boiler is not affected by this operation.
(11) Stop the pumps and close all fuel oil valves on the system.
(1) Open slowly the fuel rail recirculation isolation valve for the second boiler. This allows fuel oil to flow along the inlet rail to the three burners, and back to the pump suction.
IAS Tag No.
Description
Setting
BC027
BLR FO HTR OUT PRESS L
1.5MPa
BC0301
BLR FO HTR OUT VISCO H/L
35/8.75cSt
BC029
BLR FO HTR STRAINER DP H
0.1MPa
BC079I
BLR FO HTR OUT TEMP H/L
145/95℃
6. Boiler Burner System IAS Display
4. Boiler Fuel Oil Temp Control IAS
(5) Check pressure gauges and thermometers for ongoing readings, and bring the fuel temperature up to approximately 100°C to enable a satisfactory flashing process.
PV
PV
PID [Direct] Visco Cont.
OP
Temp Cont.
PID [Reverse] OP
3) To Change to Diesel Oil Firing Prior to Shut Down It is assumed both boilers are firing. This operation should be undertaken approximately 15 minutes before total plant shut down. Boiler F.O Viscosity
F.O Temp. Cont. Valve (Large)
F.O Heater Out Temp. Cont.
(1) Shut off steam lines and steam tracing line to the fuel oil settling tanks and fuel oil heaters. (2) Maintain a close watch of the fuel oil temperature, and when this has dropped to approximately 95°C, open the diesel oil tank outlet to fuel oil pump suction line valve.
5. Control and Alarm Settings
Large
VT
TT
No.1 F.O. Heater
F.O Temp. Cont. Valve (Small)
Steam
Small From Boiler F.O Supply Pumps
To Boiler Small
Large
No.2 F.O. Heater
100% BC081
BC080
OP
(3) Open diesel oil supply valves and close the fuel oil valves to pump suction from settling tanks. (4) Change over from atomizing steam supply to the boiler burners, closing the steam valves, and replace with the atomizing air supply. (5) With the ACC system on manual control, ensure the pressure drop in the fuel line with diesel oil now in use is compensated for by opening the fuel oil valves further. (6) Change to the spare bank of both the fuel oil pump suction and discharge strainers, to ensure both banks are flushed through with diesel..
0% 0%
50%
100%
OP of BC010
IAS control boiler FO heater outlet temp by a PID controller (BC031) with sprit range function. There are two steam supply valves’ large valve (BC080) and small valve (BC081), and the PID controller controls these two valves. When PV increase, OID controller decrease OP while increasing of PID output signal from 0% to 50%, will be opening the small valve from 0% to 100%, and while increasing of PID output signal from 50% to 100%, the large valve will be opening from 0% to 100%. For the backup of temp control loop, viscosity control(BC030) loop is also provided in IAS. PID controller is provided for visco control and output of the controller can be connected control valves of temp control loop. Selection of controller (Temp / Visco) is done by a selector switch on a g display with bump less.raphic
2 - 44
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.3a Boiler Fuel Oil & Fuel Gas Service System
F-3V
217B
TI TX
Plug 278V
F.O Temp. TS Low Trip
222B
LS
239V
232B 220B 240V
GD
BCP I
P
238V
216B
Control Air
204V (A)
211V
212V
(A)
To H.F.O Transfer Pump 298V
Duplex Pressure Gauge
F-46V
205V
F-43V
F-14V
F-66V
207V
F-68V
297V
F-13V
208V
209V
No.1 221V
Low Sulphur F.O Tank (P) (293.2 m3)
(A)
210V
213V
214V No.2 (A)
222V
TI
IAS
191B 191B
PI
Low Sulphur F.O Tank (S) (205.7 m3)
190B
194B
201V
260V
FX
TI
245V
Drain Valve & Press. Gauge to be Provided on Each Strainer
IAS
252B
Control Air
To F.O Heater Temperature Control Valve
214B 214B
LS
[Boiler Hood Room] 237V
226V
22S (60 Mesh) 227V
Temperature Control TIALH IAS
F.O Chamber
281V FI (A) 283V
DPI
F-1V
To H.F.O Transfer Pump
229V
AFT H.F.O. Bunker Tank (S) (462.2 m3)
232V (A) 233V (A)
To F.O Drain Tank
Key Fuel Oil Line Methane Vapour Line Nitrogen Line Air Line
PX
2 - 45
DPAH IAS
DPX
H.F.O Settling Tank (S) (535.5 m3)
Differential Press. Gauge
228V
Viscosity Control
TX
IAS
TI
202V
LS
LS
211B 208B
194B
No.1 Boiler F.O Heater (193B)
L
190B
223V
DPX
PI
No.2 Boiler F.O Heater (193B)
ESA IAS
261V DPX
218B
LS
H
Gas Detector
282V
220V
Control Air 264V
LS
LS
DPI
For Performance Monitor
Viscorator
LS
From Seal Air Fan
LS
Boiler F.O Service Pump (12.6 m3/h x 2.8 MPa)
(A)
LS
223B
LS
TI
236V
225B
No.3 Burner
216B
LS
TX
TX
234V
214B 214B
217B
Gas header (300A)
LS
From Seal Air Fan
Boil-off Gas
TI IAS
PX
ESA IAS
265V
258V
213B
LS
Base Burner
PIAHL IAS
262V
216B 223B
BCP
TX
LS
375B 217V
PX
Pump Change Over PS
224V
LS
215V
DPS
BCP
LS
Furnace 259V
TIAHL IAS
214B 214B
217B
IAS
225B
NG-76 NG-75
From N2 Generator
287V 289V
LS
From Seal Air Fan
TX
PI
380B
21S (60 Mesh)
TI
216V
203V
296V
263V
No.2 Burner
PX
IAS
267V 269V
LS
PS TX
PI
H.F.O Settling Tank (P) (540 m3)
From G/E M.D.O Service Tank
CI
PI
PAL IAS
253V
PIAHL IAS
ORI-23
(Burner Coaming)
223B
L
PX IAS
ORI-22
225B
ESA IAS
295V BCP
ORI-29
257B 224B
H
Furnace
To F.O Drain Tank
No.2 Main Boiler
CI
ESA IAS
FI
IAS
273V
For Safety for Gas Temp. TS Low Trip
LS
P
218V 215B 219V
212B
213B
207B PIAHL IAS
DPX
LS
257B 204B
TIAHL IAS
277V
I
For Performance Monitor
272V DPX
207B
PX
ORI-27
(Burner Coaming)
ORI-24
PX
TIAHL IAS
212B
221B PIAL IAS
From Seal Air Fan
TX
ORI-25
390B
PI
274V
ORI-26
189B 189B
221B
PI
PS
216B
LS
390B
PS
270V
LS
213B
PX
LS
218B
276V
223B
No.1 Main Boiler
257B 204B
217B
LS
LS
LS
214B 214B
213B
PIAL IAS
257B 224B
LS
ORI-28
LS
LS
FX
ORI-21
From Seal Air Fan
214B 214B
217B 216B
LS
252B
LS
Gas header (300A)
223B
Control Air
IAS
208B
213B
From Seal Air Fan
No.2 Burner 225B
LS
213B
LS
LS
211B
216B
LS
Base Burner 225B
214B 214B
217B
223B
247V
G-33V
GD
No.3 Burner 225B
LS
PX
Extraction Fan (60 m3/min. x 40 mmAq)
No.1
To No.4 Vent Riser
Gas Detector
TX TI
IAS
No.2 SF-2
F.O Temp. TS Low Trip TIAHL IAS
231V
284V
FI 286V (A)
243V
AFT H.F.O. Bunker Tank (P) (353.5 m3)
F.O Return Pipe (250A)
230V IAS
285V
G-34V
241V
291V 290V
Control Air
293V 292V
220B
P
271V
LS
242V
AFT Side Wall
BCP I
To H.F.O Transfer Pump
SF-1
222B
232B
275V
279V
Plug
PIAL IAS
Drain Line
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.6.4 Boiler Fuel Gas Service System 1. General Description The fuel gas is normally supplied to the three burners of each boiler from the cargo tanks via the L/D gas heater and L/D compressor. The combination burner burns the fuel-oil/gas inside the furnace and its burning mode is changed through fuel-oil only, gas only , dual mode etc according to the boiler operating condition. Pressurised N2 is provided for eliminating remaining fuel gas from the fuel gas pipeline when fuel gas burning is automatically stopped. The gases mixed with N2 and fuel gas are released via the vent master of No.2 cargo tank and the purging function sequence is as follows; Master N2 purge Gas header N2 purge Burner N2 purge To enable the gas to be supplied to the boilers from cargo tanks, the following equipment is provided: Two Low duty (LD) compressors. Two Boil-off / Warm-up heaters. One steam-heated forcing vaporizer. The L/D compressor discharges fuel gas through the gas heater where the temperature is regulated with two flow control valves, allowing the gas to pass through or by-pass the heater.
2. Gas Burner Operation
4. Boiler BMS System IAS Display
1) Open the instrument air supplies to the control valves and piston valves and confirm its operating condition. 2) Operate one of the boil-off leak gas extraction fan and the other one on stand-by condition. 3) Open Master Gas Valve Pressing the Master Gas Valve “Open” pushbutton causes the valve to open, When the master gas valve opens, the master N2 vent valve closes 10 seconds afterwards. 4) Open Boiler Gas Valve Pressing the boiler gas valve “Open” PB causes the valve to open. When the boiler gas valve opens, the header N2 vent valve closes after 5 seconds. This is to replace existing N2 gas in the boiler gas header piping by boil-off gas and to fill the line with boil-off gas. Thereafter, the boiler will be in the gas burning stand-by state. 5) Open the burner gas valve (214B) for the base burner Before starting gas burning, prepare the LD gas compressor, High & Low duty heaters and related systems. Initial gas burner starting should be done under free-flow conditions without the LD compressor running. The start of the gas burner may be conducted at the BGB and manually or automatically at the ECR. 6) Check & confirm temperature control function of gas heater. 7) Increasing the Number of Gas Burners as required.
The master gas valve is provided to isolate the engine room gas burning system from cargo part in case emergency operations such as the emergency Shut Down System (ESDS) activate. The fuel gas from the master gas valve is led to the boiler gas header via each boiler gas valve (211B) and the burner gas valves (214B); these two valves on each burner form a double shut-off between gas header and furnace. Gas flow control valve (208B) controls gas flow by fuel demand signal from the boiler ACC. In the master N2 purge to vent sequence, the piping from the master gas valve outlet to each boiler gas valve (211B) inlet is internally N2 purged for 60 seconds. In the gas header N2 purge to vent sequence, the piping from the boiler gas valve (211B) outlet to the gas burner valve (214B) inlet is internally N2 purged for 35 seconds.
8) Checked the L/D compressor and run it if required. 9) Checked and confirm burning condition and gas leakage etc. Note If the Gas Master Valve and the boiler gas valve stays in the shut-off condition (“Close” button lamp flashes) and the valve will not open even though the “Open” button is pressed, the interlock is engaged and must be reset to the normal condition in accordance with the boiler gas shut-off routine. 3. Control and Alarm Settings IAS Tag No.
Description
Setting
BC093
FUEL GAS COMM LINE PRESS H/L
70.0/10.0kPa
In the gas burner N2 purge to vent sequence, the piping from the burner gas valve (214B) outlet to the gas burner nozzle is internally purged for 15 seconds.
2 - 46
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.6.5a IGG and Incinerator Fuel Oil System
From/To M.D.O Bunker Station Upper Deck
Em'cy G/E M.D.O Tank
31SG
LS
Incinerator M.D.O Service Tank (2.0 m3)
IAS LS
CI
I.G.G D.O Pump (1,460 L/H x 2.5 MPa)
1051 1052
S
1012 2032 1509
4V
2S (32 Mesh)
1054 PI
32V
1005
TS
No.1 Incinerator Waste Oil Service Tank (1.5 m3)
No.2 Incinerator Waste Oil Service Tank (1.5 m3)
TS LS LS
1507
S
LS LS
L H H L
308V
304V
318V
319V
From 0.9 MPa Service Air 313V MS
CI
S
MS
S
Control Panel
306V
316V
S
317V
PI
S
TC
Washing Cooling Tower
To Oily Bilge Tank
(A)
PS
S
Pilot Bu rner
2042
TS
314V
To F.O Drain Tank
PS
S
2040
TS
PI
From Control Air System
1506
2041
(Overflow)
303V
To M.D.O Purifier
2105
2037 2038 PI
To F.O Drain Tank
LS
Mill Pump (26 m3/h x 0.04 MPa)
2103
1053 PS L
1058 1055
1004
M
L
LS
305V
25V
29V
36V
(32 Mesh)
1001 1002
H
315V
Pump 323V LS ForStop
322V
301V
To H.F.O Overflow Tank
PI
1013
LAL IAS
To M.D.O Storage Tank
37V
1003 PI
H
LS
2SG
G/E M.D.O Service Tank (30 m3)
(A) M.D.O Transfer Pump (30 m3/h x 0.45 MPa)
3S
L
For Pump Stop
320V
(A)
CI
LAH IAS
78V
34V
PI
LS
(A)
(A)
39V
(A)
48V
Incinerator M.D.O Service Pump (2 m3/h x 0.25 MPa)
309V
1SG
I.G.G M.D.O Service Tank (70 m3)
321V
302V
Em'cy G/E Room
324V
62V
From Waste Oil Transfer Pump
Primary Blower
307V
From L.O Bunkering Station (S) Drain
From Oil Mist Chamber / Header Drain
Incinerator (ABT. 700,000 kcal/h)
Main B urner
Blower 2 Blower 1
Combu stion C hambe r
Inert Gas Cooler
Key Waste Oil Line
From 0.98 MPa Steam System (Burner Atomizing Steam)
Diesel Oil Line
From S.W Supply (For Ballast System)
Inert Gas Line
310V
Sea Water Line Fresh Water Line Air Line
From F.W Supply (For Rinsing)
Drain Line
2 - 47
To Oily Bilge Tank
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.6.5 IGG and Incinerator Fuel Oil System
3) Set the service pump relief/by-pass valve to approximately half open and start the pump.
1. General Description The I.G.G system use diesel oil as its operating fuel supply. The incinerator use diesel oil as its operating fuel supply. The DO is bunkered to the IGG DO service tank via a line running from the manifold, which can be supplied from either barge or shore installation.
4) When the pump is operating satisfactorily, adjust the relief valve to the correct discharge pressure. 5) Ensure that the service tank gauge glass valves are open, and monitor them as the level rises. Stop the pump when the required level is reached. 5. Incinerator Fuel System IAS Display
The emergency diesel generator service tank is supplied oil by MDO transfer pump and IGG MDO service tank supplies the I.G.G system by direct suction from the tank through a remote operating quick closing valve. The Incinerator MDO service pump take suction from the G/E MDO service tank and supplies to incinerator MDO service tank. The MDO can also be mixed with the waste oil to the incinerator (306V), both to flush through the suction line to the unit and to lower the viscosity of the oil to be incinerated. The incinerator waste oil tank is fitted with gauge cocks to monitor the level, remote operated quick closing valve on the suction and overflows to the oily bilge tank. The incinerator waste oil tank is also fitted with high and low level alarms. 2. System Capacities IGG MDO Service tank
70 m3
Incinerator MDO service tank
2.0 m3
No.1 Incinerator Waste Oil Tank:
3.0 m3
No.2 Incinerator Waste Oil Tank:
3.0 m3
Incinerator: Model: Type: Cap:
Hyundai-Atlas MAXI 150SL-1WS Sludge oil & solid waste burning 700,000Kcal/h
3. Operating Procedures To Supply MDO to Emergency Generator Service Tank 1) Check the G/E MDO service tank for water through the spring selfclosing valve and open the remotely operated quick closing valve 29V 2) Open the Incinerator MDO service pump inlet and outlet valve 37V, 48V and close 39V, and vent off any air in the suction strainer.
2 - 48
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.7.1a Main Turbine Lubrication Oil System
224V
To be Located Far Away From React. Air Outlet Reactivation Air Out
TI
(F)
(20 Mesh)
On P.G.B. CI
TX
TX
TIAH IAS
TX
TX
TIAH IAS
TX
TX
TX
TX
TX
TX
TIAH IAS
TIAH IAS
TIAH IAS
TX
TX
TIAH IAS
TIAH IAS
TIAH IAS
TIAH IAS
TX
TX
No.2
TX
203V
TIAH IAS
TI
Main Thrust Bearing L.O Out
(F)
227V 202V FLG
TIAH IAS
TX
TIAH IAS
TX CI
PX
TIAH IAS
TX TIAH IAS
TIAH IAS
TX
TX
TX
TX
TIAH IAS
TIAH IAS
TIAH IAS
TX
TIAH IAS
PI
PX
TIAH IAS
LIAHL IAS
LS
LAL IAS
0.9 MPa Control Air
IAS IAS
Control Air
I
P
PI
215V
PI
213V
TI
(F)
TI
(F)
PI
H.P Turbine
TIAH IAS
LS
TX TX
PI PX PIAH IAS
TIAH IAS
On P.G.B. DPI
PI PIAL IAS
Control Oil Tank
L.O Temp. Control Valve PI
DPX
214V
DPIAH IAS
(F) Control Oil Pump (2.4 m3/h x 1.5 MPa)
Auxiliary L.O Pump (170 m3/h x 0.3 MPa) No.1 LX
DPS
DPLAS IAS
TX
PI
Main L.O Sump Tank (65 m3)
Astern Guard Valve Operating From L.O Mechanism Service Line
To L.O Drain Tank
Main L.O Auto Back Flushing Filter (20 Micron) DPS
Ahead Nozzle Valve Operating Mechanism
TIAH IAS
TX
Astern Maneuvering Valve Operating Mechanism
Sludge Collector
PIAH IAS
TX
TX
TIAHL IAS
To H.P Turbine & L.P Turbine
TX
PS PS
PI
TX
L.P Turbine
Main Thrust Bearing
204V
To L.O Sump Tank
TX
TI
Main Thrust Bearing Pad
TIAH IAS
Open Sett. Press. 0.1 MPa
TIAH IAS
TIAH IAS
Main Thrust Bearing
TIAH IAS
TIAH IAS
TX
TIAH IAS
TIAH IAS
TX
TI
TI
PI
212V
TI
No.1 L.O Cooler
On P.G.B. CI
P
(F)
(Water Drain)
216V
I
No.2 L.O Cooler
TI
Control Air
TIAH IAS
TI
This filling line to be provided Acc. to building spec. para 5.13.8.2
IAS
218V
Intermediate Bearings
209V
Main L.O Pump (Turbine Driven) (170 m 3/h x 0.3 MPa)
Dry Air Supply Manifold
No.1
(F)
TI
Dehumidifier
TIAH IAS
220V
No.2
ORI-21 207V
219V
TI
226V 201V
TI
PI
Astern Turbine
PI Flow Checker
For Initial Filling (Normal Close)
205V
217V
Reactivation Air In TIAH IAS
Near M.L.O Gravity Tank
208V
LIAL IAS
206V
V-4V
LX
Main L.O Gravity Tank (25 m3)
PX
To Bilge Well
Key Lubricating Oil Line Air Line Drain Line
To L.O Drain Tank
2 - 49
Part 2 Machinery System
LNGC GRACE ACACIA 2.7 Lubricating Oil Systems 2.7.1 Main Turbine Lubricating Oil System
Machinery Operating Manual In the event of the failure of pressure supplies to the main turbine lub-oil system, the flow of oil from the bottom of the gravity tank reverses and the positive head of oil in the tank, is supplied through a non-return valve to the bearings and gears.
5) Start the pump; vent off the system at the filters and selected lub-oil cooler.
1. General Description Lubricating oil is delivered to the main turbine bearings and double reduction gearing through a system which ensures the continuity of supply of high quality oil. Two electrically driven pumps, arranged in main and stand-by configuration and one shaft driven pump, draw oil from the main turbine sump tank and discharge into a common line. The shaft driven pump has a filter in its suction line. During normal full-away operations, at over 90% full ahead revolutions, the discharge pressure from the shaft driven pump is sufficient to supply the system. At these rev/min, a signal from the main turbine control unit stops the running auxiliary lub-oil pump, without starting the stand-by pump, and places the stopped pump as first start stand-by. Reducing the turbine speed below the 90% full rev/min, initiates the start of the first stand-by auxiliary electrically driven pump, without sounding any alarm. If, for any reason, there should be a further reduction in lub-oil pressure, the other electrically driven auxiliary pump will cut in. To ensure the shaft driven pump picks up suction as the engine revolutions rise, oil from the auxiliary pump discharge line passes through an orifice to keep a continuous oil pressure to the shaft driven pump suction. The system pressure is maintained constantly at around 0.3MPa by a pneumatic control valve fitted after the line filters. This allows excess oil pressure to be vented back to the sump tank.
4) Supply instrument air to the pressure control valve and the cooler three-way bypass valve. Check the operation of both units on manual control and, when satisfied, return to automatic.
The oil passes through another orifice plate and flows to the turbine and gearing bearings and the reduction gear oil sprays. A separate line leads the oil to the two intermediate shaft bearings. All the oil from the bearing and gearing supplies is returned to the sump.
6) If the gravity tank level is low, open the valve 208V(NC) and fill the tank until oil is seen at the overflow line sight glass. Shut the valve, and ensure that overflow continues.
To maintain system purity, in addition to the in-line filtration provided, the oil in the sump is circulated through the lub-oil purifier system.
7) Line up the stand-by auxiliary lub-oil pump and, when operational conditions permit, check the auto changeover of the unit.
2. Capacities and Ratings
8) With the system in operation, visually check all sight glasses on gearing and bearings. Check that local and remote thermometers and pressure gauges are reading correctly.
Shaft Driven Lub-Oil Pump: No. of sets: Capacity: Total pressure:
HHI Mitsuibishi 1 170 m3/h 0.3MPa
Auxiliary Lub-Oil Pumps No. of sets: Type: Capacity: Pressure:
Shinko 2 Vertical centrifugal 170 m3/h 0.3MPa
Lub-Oil Coolers: No. of sets: Type: Capacity:
Alfa Laval 2 SUS PLATE 760,000 kcal/h
4. Normal Operation 1) With the lub-oil system in use, the turbine itself can be brought back into operation and the turning gear operated. 2) With the engine at over 90% of its full sea rev/min, ensure the in use auxiliary lub-oil pump stops and the pressure in the system is maintained by the shaft driven pump. 3) Similarly, when speed is reduced, ensure the auxiliary pump cuts-in and provides the system oil pressure. 4) When operational requirements permit, test the system alarms to prove all is satisfactory.
3. Operating Procedures Oil from the main line is used as a control medium for the main turbine manoeuvring block operating mechanism. Oil from this line is also fed through an orifice plate to the emergency trip valve, which will allow the oil to return to the sump, thereby closing the manoeuvring valve and stopping the turbine.
5) Monitor the system filter units and the operation of the auto back-flush unit. To place the main turbine Lubricating oil system into service. 1) Verify the system’s integrity. Check the level of oil in the main turbine sump and top up as required.
Two lub-oil coolers (main and stand-by), and the associated control system, regulate the temperature of the oil under normal operating conditions. A three way control valve allows oil to pass through or bypass the in-use cooler to maintain a cooler outlet temperature of approximately 40°C.
2) Under cold operating conditions, it may be necessary to increase the sump oil temperature by use of heating steam.
The coolers are of the plate type and are cooled by water from the fresh water cooling system.
Note Depending upon service requirements, a certain degree of heating can be achieved by the circulation of the sump through the lub. oil purifier system.
The oil then passes through an orifice plate, which reduces its pressure, and a line is led to the bottom of the gravity tank, which is constantly fed to overflow back to the sump. A visual check of this overflow can be observed through a sight glass in the line.
3) Select and line up the duty auxiliary lub-oil pump. Ensure cooling water is operating through the lub-oil cooler to be used.
2 - 50
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.7.1a Main Turbine Lubrication Oil System
224V
To be Located Far Away From React. Air Outlet Reactivation Air Out
TI
(F)
(20 Mesh)
On P.G.B. CI
TX
TX
TIAH IAS
TX
TX
TIAH IAS
TX
TX
TX
TX
TX
TX
TIAH IAS
TIAH IAS
TIAH IAS
TX
TX
TIAH IAS
TIAH IAS
TIAH IAS
TIAH IAS
TX
TX
No.2
TX
203V
TIAH IAS
TI
Main Thrust Bearing L.O Out
(F)
227V 202V FLG
TIAH IAS
TX
TIAH IAS
TX CI
PX
TIAH IAS
TX TIAH IAS
TIAH IAS
TX
TX
TX
TX
TIAH IAS
TIAH IAS
TIAH IAS
TX
TIAH IAS
PI
PX
TIAH IAS
LIAHL IAS
LS
LAL IAS
0.9 MPa Control Air
IAS IAS
Control Air
I
P
PI
215V
PI
213V
TI
(F)
TI
(F)
PI
H.P Turbine
TIAH IAS
LS
TX TX
PI PX PIAH IAS
TIAH IAS
On P.G.B. DPI
PI PIAL IAS
Control Oil Tank
L.O Temp. Control Valve PI
DPX
214V
DPIAH IAS
(F) Control Oil Pump (2.4 m3/h x 1.5 MPa)
Auxiliary L.O Pump (170 m3/h x 0.3 MPa) No.1 LX
DPS
DPLAS IAS
TX
PI
Main L.O Sump Tank (65 m3)
Astern Guard Valve Operating From L.O Mechanism Service Line
To L.O Drain Tank
Main L.O Auto Back Flushing Filter (20 Micron) DPS
Ahead Nozzle Valve Operating Mechanism
TIAH IAS
TX
Astern Maneuvering Valve Operating Mechanism
Sludge Collector
PIAH IAS
TX
TX
TIAHL IAS
To H.P Turbine & L.P Turbine
TX
PS PS
PI
TX
L.P Turbine
Main Thrust Bearing
204V
To L.O Sump Tank
TX
TI
Main Thrust Bearing Pad
TIAH IAS
Open Sett. Press. 0.1 MPa
TIAH IAS
TIAH IAS
Main Thrust Bearing
TIAH IAS
TIAH IAS
TX
TIAH IAS
TIAH IAS
TX
TI
TI
PI
212V
TI
No.1 L.O Cooler
On P.G.B. CI
P
(F)
(Water Drain)
216V
I
No.2 L.O Cooler
TI
Control Air
TIAH IAS
TI
This filling line to be provided Acc. to building spec. para 5.13.8.2
IAS
218V
Intermediate Bearings
209V
Main L.O Pump (Turbine Driven) (170 m 3/h x 0.3 MPa)
Dry Air Supply Manifold
No.1
(F)
TI
Dehumidifier
TIAH IAS
220V
No.2
ORI-21 207V
219V
TI
226V 201V
TI
PI
Astern Turbine
PI Flow Checker
For Initial Filling (Normal Close)
205V
217V
Reactivation Air In TIAH IAS
Near M.L.O Gravity Tank
208V
LIAL IAS
206V
V-4V
LX
Main L.O Gravity Tank (25 m3)
PX
To Bilge Well
Key Lubricating Oil Line Air Line Drain Line
To L.O Drain Tank
2 - 51
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 5. Main Turbine Lube Oil Temperature Control
IAS
PV
PID [Reverse]
SP 45
OP
Manual Changeover
MT098
M/T LPT FWD BRG TEMP H
80℃
MT100
M/T LPT THR BRG TEMP H
80℃
MT121
M/T M/THR BRG LO OUT TEMP H
60℃
MT070SW
M/T MAIN LO TEMP H/L
54/34℃
MT143
M/T MAIN THR PAD BRG TEMP H
80℃
7. Main Turbine LO System IAS Display
Main L.O Cooler To M/T
1-TX-1/23 M/T Main L.O Temp.
Main L.O Inlet Cont.
100% 2
1
Aux. L.O Pump Valve Position 0% 0% (4 mA)
Main L.O Sump Tank
100% (20 mA) Control Output
Regulate temperature of main turbine lub. oil is done by manipulating 3 way control valve automatically in accordance with measured main lube. oil cooler outlet temperature. One PID controller (MT070) with one output signal (MT076) is provided in IAS. Manual operation of control valve from IAS is available. The IAS provides one output signal to field elements (I/P converter). When PV increases, PID controller decreases OP and changes to cooler use side. In addition, as for the input signal used for control, dual sensor change processing is performed by manually. 6. Control and Alarm Settings IAS Tag No.
Description
Setting
MT155
INT SHFT AFTBRG TEMP H
65℃
MT154
INT SHFT FWD BRG TEMP H
65℃
MT124
M/T HPT AFT BRG TEMP H
80℃
MT123
M/T HPT FWD BRG TEMP H
80℃
MT122
M/T HPT THR BRG TEMP H
80℃
MT099
M/T LPT AFT BRG TEMP H
80℃
2 - 52
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.7.2a Stern Tube Lubricating Oil System
A-125V
Key Lubricating Oil Line
From Control Air To be Arranged Delayed Auction : 20 Sec.
340V
Air Line
Air Control Unit
To Located Near Flowmeter
333V
341V
From FWD Seal Shaft Center ABT. 1 m
From FWD Seal Center 1~2 m
304V
L-51V
306V
PI
No.2
FI
303V
(100 Mesh)
302V
PI
No.1
To Oily Bilge Tank
CI
339V
CI
31S
301V From Main L.O Storage Tank
(100 Mesh)
315V
322V
337V
336V
330V
Stern Tube L.O Tank (180 Liter)
DPS
314V
Stern Tube L.O Pump (1.0 m3/h x 0.25 MPa)
From FWD Seal Shaft Center ABT. -1~1m
DPI
(L.O Inlet) (To #2, #3) To be Removed After Seal Trial
To Oily Bilge Tank
318V
317V
345V LAL IAS
To be slope This Valve to be Opened for Air Line Flushing
Drain Collection Unit
LS
Below Shaft Center
319V
(Drain From #1, #2)
331V
LS
338V
DPS
305V
32S
321V
329V
307V
Normal Level
313V
#4 #5
0.25 MPa
31SG
LALH IAS
From S/T L.O Tank Level
#3
LS
FWD Seal Tank (15 L)
323V
324V
TX
(From S/T
#2
Cap
L.O Outlet)
#1
326V 328V
S/T FWD TIAH IAS
TX
344V
With Locked Open Device
(To S/T L.O Inlet) S/T AFT TIAH IAS
TI
PI
311V
(Below S/T L.O Tank Level)
PI
332V Sett.
LALH IAS
310V
347V
308V
PAL Seal Air IAS Pressure
From FWD Seal Shaft Center ABT. 1.7 m
Stern Tube L.O Cooler
PI
From Shaft Center 1~2 m
PI
PS
TI
309V
PI
335V
AFT B.H.
(Air in to AFT Seal for #1-#2)
Drain Line
Stern Tube L.O Sump Tank (5.4 m3)
2 - 53
Part 2 Machinery System
LNGC GRACE ACACIA 2.7.2 Stern Tube Lubricating Oil System
Machinery Operating Manual 1) AFT SEAL
The Forward Seal consists of four major parts. (1) Two rubber seal rings, (2) a metal housing holding the rubber seal rings, (3) a liner which rotates together with the propeller shaft, and (4) a clamp ring which holds the liner. The metal housing is made up, in the order from the stern side, of casing flange, intermediate ring and seal cover. The metal rings of the Forward Seal are bolted together, so that the rubber seal rings can be readily clamped and assembled, similar as in the case of the aft seal. The material of the liner is used excellent wear-resistant and liplubricating properties.
1. General Description The Stern Tube Lubrication Oil (ST LO) system is provided to lubricate the stern tube and the stern tube seal system. The stern tube lube oil enters the stern tube at the bottom of the shaft through ST LO cooler by ST LO pumps and is discharged to ST LO tank. Then the oil flows to ST LO sump tank through the ST bearing.
3. Operating Procedures
Two ST LO pumps are set up as a duty standby pail. Two differential pressure switches on the pump common discharge line is used to start the standby pump. One pump is selected as duty and the other one is standby. If the discharge pressure falls under set point value, the standby pump will start and duty pump runs until discharge pressure establishes. When auto change over function is activated by motor failure and differential pressure switch, manual stop from IAS or stop at local side, the standby pump will start and the duty pump will stop. A standby start alarm is announced in IAS. The stern tube lub-oil system is provided to lubricate the stern tube and the stern tube seal system. A stern tube lub-oil tank (180L capacity), supplies the stern tube lub-oil system. The tank is fitted with a sight glass to observe the level and also has a low level alarm fitted. There is a sight glass in the overflow line return to the stern tube lub-oil sump tank. The lub-oil is fed to the stern tube bearing through stern tube LO pump and the oil circulates between the shaft and aft bearings. The oil enters the stern tube at the bottom of the shaft and discharged at the top. The oil can then flow through either an overflow sight glass and return to the sump tank, or back to the stern tube LO tank.
1) Check the oil level in the stern tube sump tank and stern tube L.O tank; top up tanks if required #0 Seal Ring
#1 Seal Ring
#3 Seal Ring #2 Seal Ring
The Aft Seal consist of three major parts. (1) Four rubber seal rings and P-ring, (2) a metal housing holding the rubber seal rings, and (3) a liner which rotates together with the propeller shaft. The metal housing is made up, in the order from the stern frame side, of spacer, aft casing flange, aft intermediate ring A, B & C and a split-type seal cover & P-ring cover. Rubber seal rings are inserted between three metal rings, and bolted together. The clamp section of each seal rings are securely fitted to the metal ring’s inner circumferences and to the small grooves on the inner side of the metal rings, so that the clamp part is made rigidly oil-and-water-tight. Provide P-ring between seal cover and P-ring cover so protection against fishing nets. The material of the liner is highly resistant to corrosion and wear.
There are two stern tube lub-oil pumps; one being normally in use and the other on auto stand by. Should the discharge line to stern tube LO tank drop, the other pump will cut in. The pumps take suction from the stern tube lub-oil sump tank. This tank is topped up from the main LO storage tank. The tank is fitted with a level transmitter and high and low level alarms.
Fwd Casing Fixing Bolt
There is a lub-oil cooler in the line to the stern tube LO tank, which is cooled from the fresh water cooling system. A by pass valve is fitted to the cooler, to both regulate the temperature and allow work to be carried out on the unit, if required.
Stern Frame
Transport Tool
Fwd Intermediate Ring
JAPAN MARNIE TECHNOLOGIES Ltd.
Type: Forward stern tube seal Aft stern tube seal
4) Confirm the condition of the flow indicator and pressure gauge. 5) Fill the aft /fwd stern tube seal tank to the normal level and open inlet and outlet valve of the aft stern tube system. 6) Confirm the stand-by pump selection on the IAS. 7) When operations allow, check all alarms on the unit to prove that they are operating satisfactorily.
4. Control and Alarm Settings
Fwd Seal Cover Fwd Liner Fixing Bolt Clamp Ring
Stern Frame Fwd Liner
2. FWD / AFT stern tube seal Maker:
3) Start up one of the pumps, ensuring air is vented at the suction strainer.
Note After the inspection of the seals in dry-dock, the stern tube must be filled at least 12 hours prior to flooding the dry-dock. A visual inspection of the seals is to be made to verify that they are oil tight. During the period, the shaft is to be turned periodically with the turning gear in order to change the position of the shaft in relation to the seal.
2) FWD SEAL Fwd Flange Casing
2) Open the pumps’ suction and discharge valves, and the inlet and outlet valves on the cooler. Have fresh water cooling medium circulating through the cooler.
IAS Tag No.
Description
Setting
SN001
S/T AFT NO.1 BRG TEMP HH/H
65/55℃
SN002
S/T AFT NO.2 BRG TEMP HH/H
65/55℃
SN003
S/T FWD BRG TEMP HH/H
65/55℃
#5 Seal Ring Back-Up Feature #4 Seal Ring "O" Ring
STERN GUARD MK-II AIR GUARD 4AS-B(3PIPING SYSTEM)
2 - 54
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.7.3a Lubricating Oil Transfer System
Surface Valve with Handle
(PORT) (PORT) (PORT)
Upper Deck
(STBD) (STBD) (STBD)
Oil Coaming
6V
LS
LS
LAH IAS
16V
31V
28V
33V Main L.O Settling Tank (80 m3)
7V 41V
From No.1 Main L.O Purifier
19V
No.2 G/T L.O Sump Tank
37V
LAL IAS
LS
L.O Transfer Pump (5 m3/h x 0.4 MPa) CI
No.1 G/T L.O Sump Tank
1S (32 Mesh)
36V 50V
23V
46V
24V
LS
No.2 L.O Daily Tank (0.2 m3) 45V
No.3 L.O Daily Tank (0.2 m3) 44V
Clean Oil Tank (0.6 m3)
21V
From Main L.O Gravity Tank Coaming Drain From Main Turbine L.O Cooler & Main Turbine L.O Coaming Drain
From Main L.O Purifier Heater and Coaming Drain
To No.2 Main L.O Purifier Supply Pump
54V
L.O Drain Tank (0.5 m3)
To Waste Oil Transfer Pump LS
From No.2 L.O Purifier
To No.2 Main To No.1 Main L.O L.O Purifier Purifier Supply Pump Supply Pump
43V
LAH IAS
48V
53V
49V To Stern Tube L.O Tank Main L.O Sump Tank (65 m3)
2 - 55
52V 51V
To Oily Bilge Tank LAHL IAS
To F.O Drain Tank
22V
No.1 L.O Daily Tank (0.2 m3)
8V
To F.O Drain Tank
No.1 G/E L.O Sump Tank
27V
47V
To C.W. Shut-off Valve
LAHL IAS
LS
26V
PI
38V
20V
18V LAL IAS
LS
Air Line Drain Line
40V
From No.1 Main L.O Purifier
No.2 G/E L.O Sump Tank
Lubricating Oil Line
34V
To Bilge Shore Connection
42V
From No.2 Main L.O Purifier
25V
9V
Key
Main L.O Storage Tank (80 m3)
39V From Hyd. Power Unit Drain
To C.W. Shut-off Valve
To Incinerator Waste Oil Settling Tank Overflow Line
35V
Generator Turbine Generator Turbine L.O Storage Tank L.O Settling Tank 12V (10 m3) (10 m3)
32V
5V
LS
17V
LS
LAH IAS
LAH IAS
15V
13V
Generator Engine L.O Settling Tank (10 m3)
3V
2V
Generator Engine L.O Storage Tank (10 m3)
LAH IAS
29V
1V
10V
To Oily Bilge Tank
Stern Tube L.O Sump Tank (1.0 m3)
From Auxiliary L.O Pump Discharge Line Drain
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.7.3 Lubricating Oil Transfer and Purifying System
- Diesel generator lub-oil settling tanks - Diesel generator sump tanks
- Diesel generator engine lub-oil settling tank: - S/T lub-oil sump tank:
1. General Description The purifying and transfer system supplies bulk oil to the main machinery systems within the engine room, and facilitates the circulation of lub-oil through purifiers. Main storage and settling tanks are provided as follows: -
Main lub-oil storage tanks Main lub-oil settling tank Turbo generator lub-oil storage tank Turbo generator lub-oil settling tank Diesel generator lub-oil storage tank Diesel generator lub-oil settling tank
The main storage tanks have facilities for direct filling from deck, and drop lines to the main consumer sump tanks. The settling tanks are located adjacent to their main storage tanks and, though it is possible to drop lub-oil from these tanks to the consumers, the valves joining them to the storage tank drop lines are normally locked shut. If it is required to transfer lub-oil from the settling tanks, this is normally done through the lines after the oil has passed through the purifiers. For safety, the drop valves from the storage and settling tanks are fitted with remotely operated quick closing valves. The lub-oil transfer pump is able to take suction from all the main storage and settling tanks, either turbine lub-oil or oil for the diesel engine. Other suctions available are as follows: - Turbine generator sump tanks - Main turbine lub-oil sump tank - Diesel generator engine sump tanks The pump is able to transfer the oil to any of the main storage and settling tanks and to deck through the tank filling lines. There are two lub-oil purifiers for the turbine oil systems; they are used primarily to circulate and purify the main turbine sump. They have options to purify the following: - Main turbine oil sump and settling tanks - Turbine generator sump and settling tanks - Diesel generator sump and settling tanks They discharge to the following: - Main lub-oil settling tank - Main turbine sump tanak - Turbine generator lub-oil settling tanks - Turbine generator sump tanks
The main lub-oil purifiers are supplied through two electrically driven rotary feed pumps. The pump discharges can be crossed over so that either purifier can be supplied from either pump. The lub-oil is passed through a steam heater. Automatic operation of all the self-cleaning purifiers is program controlled, and a supply of fresh water provides seal, flushing and bowl operating water. The three-way solenoid operated inlet/bypass valves are operated under the same program. The drain/sludge from the purifiers is led to a sludge tank under the unit, which is emptied by the engine room sludge pump.
10 m3 1.0 m3
4. LO Transfer System IAS Display
Apart from the above mentioned main lub-oil tanks, which may be filled through transfer systems, daily using other tanks are provided. These are as follows: -
Clean oil tank : 1 of 0.6 m3 LO daily tank : 3 of 0.2 m3
2. Capacities and Ratings Main Lub-oil Purifiers: No. of sets: Type: Capacity/Viscosity:
Samgong 2 Automatic, Self-cleaning, Partial Discharge 3,000 L/h SAE#30 at 40°C
Main Lub-oil Purifier supply Pump: No. of sets: Model: Capacity: Pressure:
Taiko 2 NHG-3MT 3.0 m3/h 0.3MPa
Lub-oil Transfer Pump: No. of sets: Model: Capacity: Pressure:
Taiko 1 NHG-5MT 5.0 m3/h 0.4MPa
Main Lub-oil Purifier Heaters: No. of sets: Type: Capacity:
Dong-Hwa Entec 2 Shell & tube 3.0m3/h x 40 / 85°C
5. Operating Procedures 1) To Fill Lubricating Oil (1) Check and record the level in the tank to receive the oil. Check the specification of oil being supplied.
3. Storage Capacity -
Main lub-oil storage tank : Main lub-oil settling tank: Main lub-oil sump: Turbine generator lub-oil storage tank: Turbine generator lub-oil settling tank: Diesel generator engine lub-oil storage tank:
2 - 56
80 m3 80 m3 65 m3 10 m3 10 m3 10 m3
(2) Inspect the bunker connections, ensure that the area is clean and the save-alls are secure to receive any leakage. Remove the blinds and connect the hose at the manifold. Commence filling, checking for leakage and monitoring tank levels. (3) On completion, re-check tank levels and record. Disconnect the hose and refit the blind. Contain and clear any spillage. Record the amounts received and that are now on board.
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.7.3b Lubricating Oil Purifying System
To G/E L.O Settling Tank
To G/T L.O Settling Tank or Main L.O Settling Tank 110V
(A)
To G/T L.O Sump Tank
127V
To G/E L.O Sump Tank 125V
L-42V
(A)
L-41V
112V
0.9 MPa Air TAHL
TAHL
TX
TX
122V
(A)
123V
No.1 L.O Purifier Heater TI
109V
121V
TI
(A)
124V
TI
(A)
106V
TI
To T.C.V (T-413V)
To Main L.O Sump Tank
(A)
No.2 L.O Purifier Heater
(A)
To T.C.V (T-417V)
PI
107V
PI
S
(A)
108V
S
126V (A)
WD
LM
128V
105V
115V
LS
104V Sludge Tank (10 m3)
No.2 Main L.O Purifier Supply Pump (3 m3/h x 0.3 MPa) CI
101V
11S (32 Mesh)
102V
LS
119V
PI
To Oily Bilge Tank
No.1 Main L.O Purifier (3,000 L/H)
DD
130V
To Waste Oil Transfer Pump
129V
DD
MM
(A)
114V
No.2 Main L.O Purifier (3,000 L/H)
(A)
120V
Purifier Work Bench
MM
(A)
WD
LM
LS
LAH IAS
PI
No.1 Main L.O Purifier Supply Pump (3 m3/h x 0.3 MPa)
To L.O Drain Tank
CI
12S (32 Mesh)
116V
118V
Key Lubricating Oil Line Air Line
From G/T L.O Sump or G/T L.O Settling Tank From Main L.O Sump Tank or Main L.O Settling tank or Main L.O Storage Tank or S/T L.O Sump Tank
From G/E L.O Sump Tank or G/E L.O Settling Tank
2 - 57
Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA 2) To Drop Lub-oil from Storage Tanks to Sumps and Services
Machinery Operating Manual (4) Switch on the control unit.
(1) Check oil in the storage tank for water contamination, draining as necessary.
(5) Check that the operating mode selected on the control unit corresponds
(2) Check levels in both the storage tank and the receiving tank. Check all branch valves from the drop line are closed, then line up the valves between the tanks, leaving the local receiving tank valve closed until ready to commence the drop.
(6) Start the program. (7) After the feed valves have automatically opened. - Set the backpressure in the product discharge to approx. 0.15MPa - Adjust the desired throughput - When necessary, correct the backpressure in the product discharge.
(3) Monitor the tank levels, stopping the drop at the required level Record the amount of oil transferred. 3) To Use the Lub-oil Transfer Pump As the transfer pump can be used to pump oil from many tanks and systems, great care must be taken to ensure the valves are open only on the lines required to be used, and that all other valves are closed. (1) Ensure that all inlet and outlet valves on the pump are closed. Check lines through which the oil is to be transferred and that all valves on branch lines are closed, both on the suction and discharge side of the pump. (2) Line up the suction side of the pump, ensuring that only the valves on the line from which the pump is to take suction are open.
(8) Check the discharges for solids and dirty water. 6. Control and Alarm Settings IAS Tag No.
Description
Setting
LO022
MAIN LO SUMP TK LEVEL H/L
2.65/0.48m
LO023
MAIN LO GRAVITY TK LEVEL L
0.45m
7. LO Purifier System IAS Display
(3) Line up the discharge side of the pump, ensuring that only the valves on the line to which the pump is to discharge are open. If to be discharged ashore, check that the line blind is removed and that the connection of the hose is satisfactory. (4) Monitor the tank level before, during and after the transfer. When given authority, start the pump, check the discharge pressure and inspect lines for leakage. (5) On completion of transfer, stop the pump and shut down the system, ensuring that all valves are closed. Return all blinds removed or spectacle pieces turned back to their normal positions. (6) Contain and clear any spillage. Record all tank levels and amounts transferred. 4) To Purify the Lub-oil (1) Open the shut-off valve in the product feed line. (2) Switch on the motor. (3) Open the stop valve in the product discharge.
2 - 58
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.8a Engine Room Bilge System
BF-110 ORI-3
4th Deck (STBD)
Floor (STBD)
33V
44V
4V
No.2
CI
93V
BA-42
From Sludge Tank
PI
CI
BA-41
Water Spray Pump (850 m3/h x 110 MTH)
D-56V
Drain Line
From Incinerator W.O Serv. & Sett. Tank Overflow
From S/T L.O Pump & Tank Coaming Drain
S-104V Control Air
From Aux. Cond. S.W Drain From Soot Blower Steam Drain From Atmos. Cond. Drain
Upper Deck
Em'cy Bilge Suction
4M
LS
LAH IAS LS
For E/R Bilge P/P LS Auto Start/Stop
From M/T Gland Steam
S
18V
Middle Bilge Well (STBD)
15V
From IAS
1M S-2S
Cofferdam
From Steam Line Drain
2 - 59
Scoop Inlet Recess Valve (S-13V)
(F)
From F.O Drain Tank Water Drain
3R
LS
4R
PI
Fire Line Pressure Pump (2 m3/h x 50 MTH)
S-157V
1R
69V
LAH IAS
No.1 Main Cooling S.W Pump
Clean Drain Tank (30 m3)
From Main L.O Purifier Pump & L.O Trans. Pump Coaming Drain From S/G Room Oil Coaming Drain
From Atmospheric Drain Tank Drain
73V
M
72V
96V
90V
To No.2 Ballast Strip. Eductor Driving S.W Supply
Turbine Recess (FWD)
CI
47V
101V
53V
LS
19V
To No.1 Ballast Strip. Eductor Driving S.W Supply
2R
BA-43
From Inspection Tank
From Burner Coaming & Cleaning Bench Drain
LS
LS
Turbine Recess (AFT)
58V
From Engine Room Toilet Drain
From Incinerator W.O Serv./Sett. Tank Drain
29V
Oily Bilge Tank (30 m3)
40V
Lubricating Oil Line
Air Line
Bilge Holding Tank (100 m3)
LAH IAS
7V
LS
LS
LAH IAS
LAH IAS
From Main L.O Cooler F.W Drain
94V
AFT Bilge Well
LS
24V
LAH IAS
50V
23V SF-2
LAH IAS
38V
(A)
60V
Stern Tube Cooling Fresh Water Tank
LAH IAS
(A)
(F)
20V 5R
21V
76V
6M
6R
Thrust Bearing Recess
68V
61V
Fresh Water Line
LS
To Oily Bilge Tank
AFT Peak Tank
59V
LAH IAS
62V
Sea Water Line
43V
97V From I.G.G Overboard Line Drain
Bilge Water Line
M
From Main Condenser Drain
To Recess (FWD)
From L.O Drain Tank
32V
3V
Steering Gear Room
Key
(F)
To Distilled Plant S.W Feed Pump
(F) 1V
54V To Sew. Treat. Plant & Sew. Collect. Tank
95V 92V
No.1
6V
(24 Mesh)
34V
16V
(A)
70V
3M
Control Air
2M
(F) 2V
PI
CI
1S
LS
Bilge, Fire & G/S Pump
Waste Oil Transfer Pump (5 m3/h x 0.4 MPa)
(24 Mesh)
S
85V ORI-10
2S
FWD Bilge Well (PORT)
5M
84V
CI
(24 Mesh) 25V
Engine Room Bilge Pump (10 m3/h x 0.4 MPa)
LAH IAS
CI
3 10V (245/150 m /h x 30/115MTH)
(A)
3S
PI
(A)
Oily Bilge Pump (5 m3/h x 0.4 MPa)
Auto PS Stop
PI
41V
Auto PS Stop
LS
5V PI
56V
PI
CI
From F.W Tank (S) (For Rinsing Water for Water Spray)
89V
11V
7V
45V
Auto PS Stop
Middle Bilge Well (PORT)
LS
From Soot Collecting Tank
PI IAS
PX
46V
(A)
49V
(A) 37V
36V
28V 39V
Soot Collect Tank Eductor (23 m3/h)
17V
PI
64V
From IAS
LAH LS IAS For E/R Bilge P/P LS Auto Start/Stop
From L.O Trans. Pump
55V
91V
9V
88V
BF-111
To Incinerator W.O Service Tank
Emulsion Breaker (20L)
(F)
ORI-4 BF-109
(A) From F.W Hyd. Unit
86V
ORI-2
Floor (PORT)
4th Deck Near Escape Trunk
ORI-6 BF-107
Floor Near Escape Trunk
S
S
4th Deck (PORT)
BF-130 ORI-11
26V NACH (20 L)
3rd Deck Near Escape Trunk
BF-128 ORI-13
BF-112 ORI-1
42V
LS
3rd Deck (PORT)
BF-129 ORI-12
SG-1
Mixing Tank
For Sampling
79V
Bilge Alarm 15 ppm
67V
(A)
Floating PI Tank
3rd Deck (STBD)
S-1S
80V
83V
66V
Sep. Tank
(A)
ORI-8
105V
81V
2nd Deck (PORT)
Low Sea Chest
S-156V
Power
BF-108 ORI-5
BF-105
77V
S
S
82V
Control Panel
PI
Casing BF-106 ORI-7 (STBD) 2nd Deck (STBD)
Oily Bilge Separator (5 m3/h)
Electric Heater
65V
ORI-9
BG-30 BG-31
14V
Bilge Primary Tank (5 m3/h)
Upper Deck (P)
BF-104
BF-94
Shore Connection (P) (S)
A-215V
S
From 0.9 MPa Control Air
LS
LAH IAS
FWD Bilge Well (STBD)
LS
High Sea Chest
To Water Spray
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.8 Bilge System
connection, or to the No.1 waste oil service tank and No.2 waste oil service tank Drain to the Bilge Holding Tank
Discharge of Oil Prohibited The Federal Water Pollution Control Act prohibits the discharge of oil or oily waste into or upon the navigable waters of the United States or the waters of the contiguous zone if such discharge causes a film or sheen upon or a discolouration of the surface of the water or causes a sludge or emulsion beneath the surface of the water. Violators are subject to a penalty.(USCG Rule # 155.445) 1. General description There are five main bilge wells in the engine room. These can be pumped out by one or more of the engine room bilge pumps, namely the Bilge Pump & Bilge,Fire & G/S Pump (for emergency flood clearance only), E/R Bilge Pump and Oily Bilge Pump. Note that normally the bilge wells would be pumped by the E/R Bilge Pump to the Holding Tank
From E/R toilet drain
71V
From Inspection tank
68V
Bilge water from Oily Bilge Separator or Bilge Primary tank overflow
The bilge water holding tank accepts drains from Inspection tank, E/R toilet drain and bilge wells. E/R bilge pump is sending oily water from bilge wells to the bilge primary tank. Clean water which is separated in the bilge primary tank is sent to the bilge holding tank. Bilge holding tank is pumped out using Oily bilge pump and transferred through the bilge water separator unit, before passing overboard. Drain to the Clean Bilge Tank 94V
The bilge holding tanks are as follows: -
-
From aux. cond. SW drain
3
Oily bilge tank (30.0 m ) Bilge water holding tank (100.0m3) Clean Bilge Tank(30.0 m3) Valve
58V
Drain to the Oily Bilge Tank From Burner coaming & cleaning From Incinerator W.O service tank overflow From S/G room oil coaming drain
40V
From Main LO puri. pump & LO trans. pump coaming drain From S/T LO pump & tank coaming drain
53V
From FO drain tank drain
60V
From Oily bilge pump & Bilge primary tank coaming drain
38V
Oily bilge from Oily Bilge Separator or Bilge Primary tank overflow
50V 93V
From Oily bilge separator coaming drain From Oily bilge separator out oil From E/R bilge pump & Waste oil trans. pump coaming drain
The oily bilge tank is filled with drains and/or oily residues from the oily water separator, as well as any oily water which may be directed from incinerator waste oil tank, burner cleaning device and E/R bilge pump and waste oil transfer pump coaming. This tank is normally emptied by the waste oil transfer pump and can be transferred to shore installations through the deck shore
From atmos. cond. drain
90V
From atmos. drain tank drain
96V
From main LO CLR FW drain
The clean bilge tank accepts drains from steam line drain, soot blower steam drain, etc. Clean bilge tank is pumped out using No.2 Fire, bilge & G/S pump and transferred directly out of ship There are five main bilge wells in the engine room as follows: -
1) Technical data Model (Double stage): Design / Hydro pressure: Capacity: Operation Temp.:
HYN05000 0.44/0.66MPa 5.0m3/h 20~60℃
2) Principal of separation. The HANYOUNG oily separator HYN-5.0 is combination of a gravity separator with built-in coalesce. The system works with a completely new principle of hydrodynamics. Latest physical trends concerning oil-in-water dispersion, homogeneous fluid mechanics and coalescence effects are incorporated in the HYN-system. Not to cause of emulsion when pump run, it is advantageous to use a pump of low revolutions and less emulsification. Such as MONO, PISTON instead of high one such as Centrifugal Pump.
Form soot blower steam drain From M/T gland steam
From Incinerator W.O service tank drain 76V
From steam line drain
2. Bilge Water Separator
Port and starboard forward Port and starboard middle Aft well
The port and starboard forward bilge wells are fitted with high level alarms, and all of the bilge well can be pumped out by direct suction through Bilge, Fire & G/S Pump. The port and starboard mid bilge wells are fitted with a high level alarm and level switch. The aft bilge well collects drains from the save-alls in the steering gear room, F.W tank (P & S) and Dist. Water tank (P & S) which can be emptied into the well through spring loaded valves. The aft well has a high level alarm fitted.
Separator has CPI (Corrugate Plate Interceptor). The oil and water mixtures introduced into square chambers where enhance buoyancy effects from small oil droplets to larger one. In 1st Filter cartridge and Upper tank, after going through CPI oil coalesced will be accumulated on upper tank and water will be down to the level of oil. But very small disperse oil and oil droplets which is too small to buoyancy will be lowered down to the bottom tank where located 1 filter cartridge. When liquid pass through filter cartridge, oils absorbed by filters. The oil separated out collets in the upper settling zone of the own. An efficient heating system warms this area to support the separation process, make the oil pumpable and protect the electrodes against clogging. It is recommended to set the temperature approximately 50 degrees. Oil level detector detects oil level and if detected send signal to solenoid valve open to discharge oil to oil collecting tank. Oil can be discharged by existing tank inside pressure to oil collection (sludge) tank. Oil content meter monitor works on the light scatter principle and can be relied on to give warning when free oil particles or oil-in-water emulsions cause the 15ppm limit to exceeded. When the alarm is triggered, the pneumatic 3-way valve is switched via a dead contact to re-circulation mode after the set time interval has elapsed to prevent possible outboard oil contamination.
No.1 Main Cool S.W Pump has the engine room emergency bilge suction valve fitted to its suction lines. This can be used in an emergency for direct suction of bilge water and pumped overboard.
2 - 60
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.8b Oily Bilge Separator
Floating Tank
Separator Tank S
Electric Heater EH
To Oily Bilge Tank
OLS
OLS
S
Mixing Tank Pressure Gauge
Control Panel
15 ppm Bilge Alarm
Bilge In
N.P.
Automatic Stopping Device S
P.G
Emulsion Breaker (20L)
Mixing Pump
Dosage Pump NAOH (20L)
S
Motor & Pump
Dosage Pump
F.W. Inlet
S
Air Supply Inlet Point Recirculation Valve
Over Board
To Holding Tank To Holding Tank
S
Strainer
Back Washing
Bilge Tank
2 - 61
Part 2 Machinery System
LNGC GRACE ACACIA Water for backwashing
Machinery Operating Manual to an relay output.
-
Water for back washing Approximately 1~2 bar pressure are required for backwash water from sea or fresh water hydrophor are sed. Backwash are controlled by oil detector and it run until oil purge out of oil collecting tank.
Additional to the alarm LED’s each alarm circuit is equipped with a relay with potential free alarm contacts. These contacts can be used for external processing of the signal or for control of further functions.
-
Backwashing : Solenoid actuated 2-way valve is operated fully automatically. Separation, backwash are sequenced by controller and valves are controlled by solenoid actuator.
If a malfunction or failure of the power supply occurs, all 3 relays will switch to alarm condition. 2) Operating procedure
Immediately after discharging the oil the backwashing is started. Clean water is used for backwashing. The coalescer is cleaned from oil and dirt by automatic backwashing. The mixture of oil sludge and water is drained off to the bilge.
a) Switch on the power supply.
2. 15ppm Bilge Alarm
c) Flow oil free water through the system for a few minutes
1) Principle of operation a) Measuring principle An optical sensor array measure a combination of light scattered and absorbed by oil droplets in the sample stream. The sensor signals are then processed by a microprocessor to produce linearized output. If an alarm (work set point 15ppm) occurs, the two oil alarm relays are activated after the adjusted time delay. The microprocessor continuously monitors the condition of the sensor components and associated electronics to ensure that calibration accuracy is maintained over time and extremes of environmental conditions.
b) Allow a period of time for water entering the sample tube.
d) Switch the instrument sample supply from the clean water supply to the separator sampling point connection. e) The instrument is now ready for use. NOTE 1. When oily water flow through the instrument the display will show the actual value of oil content. 2. If the oil concentration exceeds the adjusted threshold (works adjustment 15 ppm), the alarm indicator 1 will be illuminated in intervals during the selected time delay before it change to steady light and the associated alarm relay will operate. Accordingly also the alarm indicator 2 will be illuminated and its associated alarm relay will take the appropriate shut down action.
b) Displays and Alarms In the unit are two independent oil alarm circuits available. Both can be set separately from 1 to 15 ppm. From the manufacturing both alarms are set to 15 ppm (according IMO). The set points can be changed to 10 ppm or 5 ppm. An alarm point setting above 15 ppm is not possible. The adjustment can be done in the programming mode In the mode also the individual adjustment of the time delays for the alarms and the possible changing between 0 ~ 20mA or 4 ~ 20 mA output can be done Both alarm circuits are also related to an alarm LED on the front panel. In case of malfunction the “System” LED will indicate any type of internal fault of the unit. This LED is flashing green in normal conditions and is red in alarm conditions. Also this alarm is related
2 - 62
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA
Spare
No.2 Boiler Feed W. Control Valve (26B)
256V
235V
188V
Boiler Soot Blower Steam Inlet Piston Valve (284B)
Spare
Spare
187V
No.1 Boiler Feed W. Control Valve (26B)
Spare
255V
186V
No.1 Boiler F.O Control Valve (220B)
Spare
254V
173V
No.2 Boiler Atomizing Steam Piston Valve (226B)
137V 212V 199V 200V
6.03/0.98 MPa P.R.V. Atomizing Steam (T-707V)
196V
Spare
No.1 Boiler Purge Steam Control Valve (399B)
195V
No.2 Boiler B.O.G Control Valve
No.2 Boiler Purge Steam Control Valve (399B)
No.1 Boiler F.O Burner Solenoid Valve Board (271B-P)
Spare
No.2 Boiler Remote Hot Starting Piston Valve (79B)
127V 6.03/0.98 MPa P.R.V. for Aux. Steam (T-715V) D.S. Heater Control Valve for Aux. Steam
For Boiler Trip PS
No.2 Boiler F.O Burner Solenoid Valve Board (271B-S)
No.1 Boiler Remote Hot Starting Piston Valve (79B)
237V
236V
LL
No.1 Boiler Gas Burner Solenoid Valve Board (270B-P)
0.98/0.6 MPa P.R.V. (T-402V)
111V
224V
181V
No.1 Boiler B.O.G Control Valve
PS
194V
LL
No.1 Excess Steam Dump P.C.V. No.2 Boiler Soot Blower Steam Vent Piston Valve (285B) No.1 Boiler Soot Blower Steam Vent Piston Valve (285B) No.2 Main Boiler 2ry Steam Temp. Cont. Piston Valve (133B) No.1 External Desuperheater T.C.V.
218V
No.2 Boiler Gas Burner Solenoid Valve Board (270B-S)
168V
192V
169V
166V
243V
189V
190V
133V
174V 226V
180V 248V
105V
230V
132V
182V
110V
148V
Spare Spare
179V
To No.1/2 Main Boiler Smoke Indicator Receiver
PI PIAL IAS
(Auto Drain) (Manual Drain)
PX
(A)
247V
M/T L.O Press. Control Valve
Central F.W Cooling Water T.C.V. (W-12V)
Air Purge Type L/G (H.F.O Overflow Tank)
214V
0.18 MPa P.C.V.
161V 209V
220V
1st Stage Feed Water Heater L.C.V.
204V 131V
217V
125V M/T Warming-up Press. Control Valve (PV-1)
M.D.O Purifier
M/T Warming-up Steam Cylinder Valve (PV-2)
Boiler F.O Pump P.C.V. (215B)
Spare
Spare
Spare
Spare
238V 139V 175V 176V
135V
142V
G/E F.W Cooler T.C.V.
(3 Micron)
Oil Removal Filter (0.01 Micron)
113V 112V
221V
PIAL IAS
(1 Micron)
170V 222V
No.2 External Desuperheater T.C.V.
233V
126V
No.2 E/R Control Air Dryer (250 Nm3/h F.A.) Refrig. Type Oil Removal Filter (1 Micron)
No.1 Main Boiler 2ry Steam Temp. Cont. Piston Valve (133B)
PX PI 229V
PS
Control Air Compressors (350 m3/h F.A.D. x 0.9 MPa)
138V
Mid Bilge Well (S) Shut-off Valve
203V
No.2 Cargo Deck Air Dryer (250 Nm3/h F.A.) Desiccant Type
223V
No.1 E/R Control Air Dryer (250 Nm3/h F.A.) Refrig. Type
PS
No.1 (Auto Drain) (Manual Drain)
(0.01 Micron)
To Bilge Well
2 - 63
PIAL IAS
121V
PS
Control Air Reservoir (7.5 m3 x 0.9 MPa)
From Working Air Compressor
No.2
123V
201V Spare
To Funnel Sett. 0.99 MPa
PS
197V
No.2 G/T Sealing Steam Controller
141V
8.65/3.0 MPa P.R.V. for Ext. Desuperheater
239V
Spare
145V
M/T Ahead Valve Drain
No.2 Excess Steam Dump P.C.V.
136V No.1 & 2 L.O Purifier
M/T L.O T.C.V.
115V
(1 Micron)
No.1 Cargo Deck Air Dryer (250 Nm3/h F.A.) Desiccant Type
To Accommodation
122V 151V
PX PI
231V
Spare
202V
177V
No.1 G/T Sealing Steam Controller
157V
232V
Boiler Feed Water Pump Recirc. W. Shut-off Valve (M-824V)
HP Bleed Steam Drain Valve
4th Deck (STBD) (40A)
Spare
144V
241V
Atmos. Drain Tank L.C.V. (M-108V)
6.03/0.32 MPa Aux. Steam P.R.V. (T-719V)
Plasma Equipment
213V
191V
147V
158V
6.03/0.45 MPa P.R.V. (T-711V)
228V 1.63/1.03 MPa P.R.V.
117V 119V
Deaerator L.C.V. (Spill, M-116V)
Main Condenser L.C.V. (M-58V)
146V
134V
HP Turbine Drain Valve
116V 118V
159V
252V
Deaerator L.C.V. (Make-up, M-120V)
M/Cond. Dump Steam Desuperheater Heating Chamber Water Control Valve
140V M/T Gland Steam Control Valve
114V
150V
240V
156V
171V
149V
207V
Main Condenser L.C.V.
160V M/T Astern Spray Water Piston Valve
M/T Astern Valve Drain
4th Deck (PORT) (40A)
No.2 Distilled Plaint Heating Steam Control Valve
143V
4th Deck (PORT) (40A)
No.1 Distilled Plaint Heating Steam Control Valve
242V
124V
165V 162V Mid Bilge Well (P) Shut-off Valve
To N2 Generator Instrument Air
Exhaust Main Dump Valve (X-28V)
To Air Control Unit for S/T L.O System
215V
To Oily Bilge Separator
Main Steam Dump Valve Shut-off Valve (T-730V)
Purifier Room (40A)
253V
185V
198V
No.1 Boiler Atomizing Steam Piston Valve (226B)
3rd Deck (MID) (40A)
Spare
178V
172V
225V
193V
No.2 F.D Fan Drive Unit
No.2 Boiler F.O Control Valve (220B)
2nd Deck (40A)
Level Trans. for 3rd Stage F.W Heater
152V Upper Deck (40A)
109V
184V Stand-by F.D Fan Driven Unit
219V
130V
Boiler Upper Part (40A)
153V
No.1 F.D Fan Drive Unit
For Boiler Trip
129V
128V
234V
Illustration 2.9.1a Control Air System
(A)
To I.G.G System (I.G.G) To I.G.G System (I.G Dryer) To Cargo Control System (S)
Key Control Air Line Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA 2.9 Compressed Air Systems 2.9.1 Control Air Systems 1. General Description The control or instrument air system provides dry, clean air at 0.9MPa pressure, to operate control valves (both pneumatic and electro-pneumatic) and dampers throughout the vessel. Two electrically driven compressors supply air to the control air receiver. From here the air flows through the oil/water separator. If the air is for the cargo operating systems it will then pass through a desiccant type dryer and if for the engine room control systems, it will pass through a refrigerant type air dryer. 1) Air Compressors The compressors can be started locally, they are normally on remote control, one unit on auto start, the other on standby. The in-use compressor will cut in with the receiver pressure at approximately 0.8MPa and stop when the bottle pressure is raised to approximately 0.9MPa Should the receiver pressure continue to fall to approximately 0.7MPa, the second compressor will start and assist in pumping up the receiver. If, for any reason, the air pressure in the receiver should fall 0.7MPa below the No.2 compressor’s cut-in pressure, an emergency cross over valve (19V) from the working service air system will open, allowing air to flow from the working air compressors to the control air system. The receiver is fitted with relief valve set at 0.99MPa. After the receiver, the air passes firstly through a dust filter, which is a cartridge type filter, to remove small solids trapped in the air. Secondly, the air passes through an oil free filter, to remove any entrained oil droplets. The air then flows to dryer units: For the cargo control air system-desiccant type units For the engine room machinery control system-refrigerant type units 2) Desiccant Type Dryer
Machinery Operating Manual The first unit will now have its desiccant heated and air circulated over it. The moisture created is separated out in a cyclone type separator, where the moisture droplets will fall and be drained off, and the dry air allowed to purge the unit. At the end of the regeneration cycle, the desiccant bed will again be in a satisfactory condition to dry the moisture of the incoming control air supply, repeating the process as necessary.
4) )Start the compressor and check the air pressures and lub-oil pressure are satisfactory. 5) )Switch the compressor to auto control, and allow the reservoir to reach its full pressure. Check that the compressor stops. 6) )Open the reservoir discharge valve.
3) Refrigerated Type Dryer 7) )Open the inlet and outlet valves to one set of oil filters. There is one refrigerant type air dryer is provided. This types of units consist of a sealed refrigeration compressor, which flows through an evaporation coil. The control air from the receiver passes around the coil and cooling it, so that moisture droplets in the air become heavy and separate out. An automatic drain in the unit allows the accumulated moisture to flow to the bilge. An after filter is fitted in the line, to further remove any remaining entrained water droplets.
8) )Open the inlet and outlet valves to the desiccant, ensuring that all drain valves are closed. 9) )Switch on the power supply. Start up the driers in conjunction with the manufacturer’s operating instructions. 10))Once the driers are in operation, maintain checks on the line pressure and dew point in the system. 11) When operations permit, check and test all cut-ins and alarms.
2. System Capacities and Ratings Control air compressor: No. of sets: Type: Capacity:
Atlas Copco MFG. Korea Co., Ltd 2 M.D., Rotary Screw 350 m3/h x 0.9MPa
Control air reservoir: No. of sets: Capacity:
Kang Rim 1 7.5 m3 x 0.9MPa
Air drier: No. of sets: Type: Flow:
Kyung-Nam 2 Desiccant Abt 250 m3/h
Air drier: No. of sets: Type: Flow:
Kyung-Nam 1 Refrigerated 250 m3/h
4. Control and Alarm Settings IAS Tag No. CA005
Description
Setting
CONTROL AIR RSVR PRESS L
0.7MPa
5. Compressor Air System IAS Display
3. Operating Procedures
There are two units provided, to work in automatic mode, where one unit is operating and drying the air passing through it and the second is having its desiccant regenerated.
1) )Ensure that the air compressor is ready for use, that the sump oil level is satisfactory, cooling water to inter-coolers is in use and the discharge valve from the compressor is open.
The control air passes into the unit and over a desiccant bed, where the moisture in the air is drawn out by the desiccant. The dry air then flows out to the control system, leaving the moisture in the desiccant.
2) )Open the inlet valve to the reservoir, closing the drain valve. Ensure that the valve to the auto drain is open and the bypass valve is closed.
When the desiccant has become saturated, the units will automatically change over, allowing the standby unit to become the dryer.
3) )Check that all valves and lines to the pressure switches for starting and stopping the compressor are open.
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.9.2a Starting Air System
To Funnel
No.2 Generator Engine
Key Starting Air Line
48V
Drain Line
No.1 Generator Engine 49V
From N2 System
From Control Air Reservoir From Working Air Reservoir
PX
PX
PIAL IAS
PIAL IAS
Generator Engine Starting Air Compressor (25 m3/h F.A.D. x 2.5 MPa)
Oil/Water Separator
To Deck Scupper
(A)
No.1 Generator Engine Air Reservoir (0.5 m3 x 2.5 MPa)
(A)
4V
PS
46V 45V
PI
PX
3V
PX
No.2 Generator Engine Air Reservoir (0.5 m3 x 2.5 MPa)
PIAL IAS
Sett. 2.75 MPa
44V
Sett. 2.75 MPa
PIAL IAS
PI PS
2V
No.2 H.P Magnetic Valve
5V
L.P Magnetic Valve
1V
No.1 H.P Magnetic Valve L.P Magnetic Valve
Separately Lead To Bilge Well
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.9.2 Starting Air Systems
3. Operating Procedures
4. Control and Alarm Settings
1. General Description 1) Diesel Generator Engine Air Starting System The G/E starting air compressors are set up in a lead follow/configuration. The lead compressor will start at 2.0MPa receiver pressure, and stop at 2.5MPa. If the pressure should fall to 1.8MPa, the follow compressor will cut in, assisting charging up the reservoir to 2.5MPa. Start and stop limits are parameter settings that can be changed by operators. Pressing the “ON” button on the operator panel, both compressors will be switched to auto mode and follow compressor can be switched by operating software buttons. Pressing the “OFF” button on the operator panel, both compressors are switched to manual mode.
(1) Check the compressor to be used. Ensure that the oil sump level is correct. Check that the fresh water cooling system valves are open and there is a flow through the inter and after coolers.
The diesel generator has air-starting systems and unit is provided with air at 2.5MPa
(4) Ensure that all valves are open to the pressure switches for the cut-in and cut-out of the compressor.
The generator engine starting air compressors for the system are two electrically driven reciprocating units, which supply air to the diesel generator air start reservoir. At each start of the compressor, the auto drain will open for a short period to allow any accumulated moisture in the unit to be discharged to the bilge before allowing the compressed air into the reservoir.
(5) Start the compressor in manual mode and commence to raise the pressure in the reservoir. Inspect the pressures of the compressor local gauges and, when all is satisfactory, change to auto mode.
(2) Open the discharge valve from the compressor and the inlet valve to the air reservoir.
Both air reservoirs are fitted with relief valves set to lift at approximately 2.75MPa.
(8) When the operation of the compressor is satisfactory, open the reservoir outlet valve to the diesel generator engine air start system.
Two air compressors supply the D/G start air reservoirs. At the compressors, the auto drain valve will open for short periods to allow any accumulated moisture to be discharged to the bilge. A software generated “Long run” alarm will be implemented for the compressors.
Note At the lowest point along the line from reservoir to the generator engine, a double shut off valve is fitted. Periodic opening of these valves will ensure that no moisture stays in this line and is unable to enter the engine air start system.
Capacity:
Jong Hap 2 M.D., 2 Stage, Reciprocating, air cooled 25 m3/h x 2.5MPa
G/E Starting Air Reservoir: No. of sets: Capacity:
Kang Rim 2 0.5 m3 x 2.5MPa
Setting
CA018
G/E START AIR RSVR 1 PRESS L
1.5MPa
CA901
G/E START AIR RSVR 2 PRESS L
1.5MPa
5. Compressor Air System IAS Display
(6) Ensure that the compressor stops when the reservoir pressure reaches approximately 2.5MPa, and restarts when the pressure drops to approximately 2.0MPa. (7) As the compressor starts, check the operation of the magnetic unloader, so that the unit drains to the bilge in order to exclude any moisture already in the compressor, before pumping to the reservoir.
G/E Starting Air Compressors. No. of sets: Type:
Description
(3) Line up the drain valves from the reservoir for the auto drain valve to be in use.
Although the compressors can be started locally, they are normally on remote control, one unit on auto start, the other on stand-by. The in-use compressor will cut in with the reservoir pressure at approximately 2.0MPa and stop when the pressure is raised to approximately 2.0MPa. Should the reservoir pressure continue to fall to approximately 1.8MPa, the second compressor will start and assist in pumping up the reservoir.
2. System Capacities and Ratings
IAS Tag No.
(9) Periodically open the generator engine starting reservoir manual drain valves and the generator engine starting reservoir to ensure all moisture is drained from them and to ensure the auto drain valve is operating correctly. (10)When the system is operating satisfactorily, place the second compressor on stand-by mode and when operating procedures allow, check that all alarms and changeovers operate satisfactorily.
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.9.3a Working Air System
20V
33V
34V To Incinerator Room
To 2nd Deck (P)
37V
To Incinerator Purge Air
36V
To Passage To Passage To Air To To Accomm. Pneu. To CO2 Way (P) Way (S) Horn Accommodation Vent Damper Room
To Em'cy D/G Room
26V
35V
Near F.D Fan
32V
25V
(A) 31V
(A)
61V
To Engineer's Store Door (Outside) To Steering Gear Room
To Near Auxiliary Condenser 30V
38V
29V
24V
To F.W/D.W Hydrophore Unit
To Electric Work Shop
To Near Boiler Burner
To Work Shop S
Fire/Gen. Alarm Horn (2nd Deck, AFT)
23V
47V
To Purifier W/B 50V
To Boiler Atomizing
Floor AFT
27V For G/E Turning Gear G/E T/C Cleaning 28V (10 m) To G/E F.O Shut-off Valve Fire/Gen. Alarm Horn (Floor)
S
67V
22V Near Bilge Fire & G/S Pump
60V To Pipe Duct
To Funnel
PS
PI PX
Auto Drain Manual Drain
Working Air Compressor (350 m3/h F.A.D. x 0.9 MPa)
19V
PS
(A)
To Pipe Duct
39V
41V Oil Removal Filter (1 Micron)
To No.2 Control Air Compressor
63V
E/R FWD Bulkhead
Working Air Reservoir (7.5 m3 x 0.9 MPa)
PIAL IAS
66V
Sett. 0.99 MPa
To Air Reservoir for Quick Closing Valve in Fire Control Station
(A)
40V
42V Oil Removal Filter (0.01 Micron)
From Control From Starting Air Air System Compressors
Key Working Air Line Drain Line Separately Lead To Bilge Well
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA
3. Operating Procedures
2.9.3 Working Air Systems
1) To Distribute working Air
1. General Description The working air service provides service air at 0.9MPa to the following auxiliaries and locations: On deck: -
CO2 Room Air horn Deck air service line Accommodation air lines Passage way (P&S) To Accommodation Pneumatic vent Damper Em’cy D/G Room
(1) Check the compressor to be used. Ensure that the oil sump level is correct. Have the fresh water cooling system valves open and check the flow through the inter and after cooler units. (2) Open the discharge valve from the compressor and the inlet valve to the air receiver. (3) Line up the drain valves from the receiver for the auto drain valve to be in use and the by pass valve closed. (4) Ensure that all valves are open to the pressure switches for cut-in and cut-out of the compressor. (5) Start the compressor in manual mode and raise the pressure in the receiver. Inspect the pressures of the compressor on local gauges and when all is satisfactory, change to auto mode.
Engine room: -
5. Compressor Air System IAS Display
To 2nd Deck (P) To Near Aux. Condenser Near F.D Fan To Near G/E To Incinerator To G/E FO shut off Valve To Puri. W/B To M/B Atomizing Air Near Main Boiler Burner To Floor aft To Electric Work Shop To Work-Shop To Incinerator Purge air To Steering gear room To F.W / D.W Hyd. Unit Near Bilge fire & G/S Pump
(6) Ensure that the compressor stops when the receiver pressure reaches approximately 0.9MPa, and restarts when the pressure drops to approximately 0.8MPa (7) As the compressor starts, check the operation of the magnetic unloader that the unit drain to the bilge in order to exclude any moisture already in the compressor, before pumping to the receiver. (8) When the operation of the compressor is satisfactory, open the receiver outlet and open the valves on the air main as required. (9) As the compressors have no air dryer units in the system, great care should be taken to ensure the receiver is drained of any moisture. The auto drain valve operation should be checked and the by pass valve opened occasionally to ensure this.
Emergency air supply to the control air system is also provided, should the pressure in the control system become too low. A solenoid valve is operated if this occurs, allowing the W/A compressors to supply air to both systems. Similarly, the control air compressors are able to supply the working air system by opening the auto solenoid valve. One electrically driven compressor supplies air to the working air receiver. From here the air is discharged to the various lines and connections as detailed above. 2. Specification Working air compressor: No. of sets: Type: Capacity:
Atlas Copco MFG. Korea Co., Ltd 2 M.D., Rotary Screw 350 m3/h x 0.9MPa
Working air reservoir: No. of sets: Capacity:
Kang Rim 1 7.5 m3 x 0.9MPa
(10)For similar reasons as in item 9), whenever working. air is to be used in a system, always blow through the line and ensure no moisture has been allowed to accumulate, especially if the system has not been used for some time. (11)If a piece of machinery is to be operated by the supplied air, always ensure there is a lubricator unit attached. (12)When the system is operating satisfactorily, place the second compressor on stand by mode, and when operating procedures allow, check all alarms and changeovers operate satisfactorily. 4. Control and Alarm Settings IAS Tag No.
Description
Setting
CA012
WORKING AIR RSVR PRESS L
0.7MPa
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.9.4a Emergency Shut-Off Air System Fire Control Station
These Cocks/Valves To be Installed Near Vent Damper
To be Located Outside Engine Room PX
51V To Funnel Ventilation Damper (S)
PIAL IAS
52V
PI
Air Reservoir for Quick Closing Valve
To Funnel Ventilation Damper (P)
To Vent Damper Air Cylinder for Engine Ventilation
To No.1 Engine Room Supply Fan Vent Damper To be G/E M.D.O Service Tank
No.2 Incinerator No.1 Incinerator W.O Service W.O Service Tank Tank (1.5 m3) (1.5 m3)
(A)
F-315V
To No.4 Engine Room Supply Fan Vent Damper
G/E L.O Settling Tank (10.0 m3)
F-101V
F-126V
F-29V
To No.1 Engine Room Exhaust Fan Vent Damper
L-6V
G/T L.O Settling Tank (10.0 m3)
To No.3 Engine Room Supply Fan Vent Damper
Incinerator M.D.O Service Tank (2.0 m3)
To STBD Group
I.G.G M.D.O Service Tank (70 m3)
To PORT Group
L-17V
2nd Deck
F-36V
F-81V
Casing
F.O Addictive Tank (3.0 m3)
F-304V
63V
G/E M.D.O Service Tank (30.0 m3)
To No.2 Engine Room Exhaust Fan Vent Damper To Purifier Room Exhaust Fan Fire Damper
L-206V
L-32V
To Diesel Generator Exhaust Fan Damper
Main L.O Gravity Tank (25.0 m3)
Main L.O Settling Tank (80.0 m3)
To Oil Store Exhaust Fan Damper
3rd Deck
To Chemical Store Exhaust Fan Damper
4th Deck
H.F.O Overflow Tank (70.0 m3)
Low Sulphur F.O Tank (S) (205.7 m3)
H.F.O AFT H.F.O Settling Tank (S) Bunker Tank (S) (535.5 m3) (462.2 m3)
Floor Deck
2 - 69
F-27V
F-1V
F-201V
F-43V
F-3V
H.F.O AFT H.F.O Settling Tank (P) Bunker Tank (P) (540.0 m3) (353.5 m3)
F-6V
Low Sulphur F.O Tank (P) (293.2 m3)
F-203V
To Welding Space Exhaust Fan Damper
F-46V
From G/S Air System
F-318V
To No.2 Engine Room Supply Fan Vent Damper
M.D.O Storage Tank (100 m3)
Key Air Line Diesel Oil/ Gas Oil Line Fuel Oil Line Lubricating Oil Line Waste Oil Line Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA 2.9.4 Emergency Shut Off Air System 1. Operation of Emergency Shut-off System 1) Ensure that the air supply to the receiver through engine room control air drier and inlet valve to the receiver is open. 2) Check that the receiver pressure is at 0.9MPa 3) The air from the receiver can be used to operate the quick closing valves by operating the two way lever valve for four systems:
Machinery Operating Manual Note The emergency generator diesel oil service tank quick closing valve is operated by a wire, situated outside the emergency generator room. 2. Control and Alarm Settings IAS Tag No.
Description
Setting
CA013
QUICK CLOSING AIR PRESS L
0.4MPa
To STBD Group: HFO OverFlow Tank Low Sulphur Tank(S) HFO Settling Tank(S) Aft HFO Bnker Tank(S) Main LO Gravity Tank MDO Storage Tank Main LO Settling Tank G/E LO Settling Tank G/E MDO Service Tank No.2 Incinerator WO Service Tank No.1 Incinerator WO Service Tank Incinerator MDO Service Tank To PORT Group Low Sulphur F.O Tank(P) AFT HFO Bunker Tank(P) HFO Settling Tank(P) FO Addictive Tank IGG MDO Service Tank G/T LO Settling Tank To G/E MDO Service Tank G/E MDO Service Tank To Vent Damper Air Cylinder To Funnel Ventilation Damper(S) To Funnel Ventilation Damper(P) To No.1 Engine Room Supply Fan Fire Damper To No.2 Engine Room Supply Fan Fire Damper To No.3 Engine Room Supply Fan Fire Damper To No.4 Engine Room Supply Fan Fire Damper To No.1 Engine Room Exhaust Fan Fire Damper To No.2 Engine Room Exhaust Fan Fire Damper To Purifier Room Exhaust Fan Fire Damper To Diesel Generator Exhaust Fan Damper To Oil Store Exhaust Fan Damper To Chemical Store Exhaust Fan Damper To Welding Space Exhaust Fan Damper
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.10a Steering Gear Hydraulic Diagram Key Hydraulic Oil Line
To/From Actuator
Leak Oil
To/From Actuator
Drain
M
M
Storage Tank
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.10 Steering Gear
3. Function of the Pump/Control unit
1. General Description
The steering gear is normally operated from the steering controls initiating the pilot valve solenoids. For emergency operation, the pilot valves are equipped with push button controls which make it possible to operate the steering gear manually from the steering gear compartment.
The control valve (3) is now at the beginning of its stroke. Some of the oil flows through the throttling slots to the actuator, and overflow is by-passed at the bypass valve (4) back to the suction side of the pump. The smaller oil volume being directed gradually to the actuator will give a soft start.
Fig. 1
Fig. 3
The FRYDENBO steering gear on this vessel is composed of one hydraulic rotatry vane actuator mounted directly on the rudder stock, served by two pump units delivering the necessary oil pressure for operating the rudder. The two pump units may be operated together or separately. Each pump unit will provide oil with sufficient pressure to develop the specified rudder torque.
The control valve (3) will be pushed over to the right side, by the oil pressure in the left chamber.
Current or Push
When cruising at sea, only one pump unit is normally in operation while the other is acting as a stand-by unit. During manoeuvring of the vessel, when the shortest possible steering time is required, it is possible to run both pump units simultaneously whereby the rudder rate will be doubled.
Solenoid - Pilot Valve Safety Relief Valve
Solenoid - Pilot Valve Safety Relief Valve By-pass Valve
By-pass Valve
The pump units are equipped with solenoid valves, which are normally operated by means of signals from the bridge steering controls.
A, Return Oil From Actuator B, Working Press To Actuator
Control Valve
The pump is submerged in the oiltank. The tank is divided into three chambers, one for each pump unit and one for the integrated storage tank, with one level alarm-switch in each of the pump unit chambers. From top of the steering gear leakage oil will run through pipe to the oiltank.
Control Valve
A, To Actuator B, To Actuator 1 Pressure From Pump
1 2 Idling Pressure Return To Pump
2 Return To Pump
2. Specification 1) Rudder Actuator Type: Rudderstock diameter: Max. Rudder Angle: Max. Working Pressure: Relief valve setting: Design torque:
RV4000-3 640mm 2 x 46.5o 7MPa 8.75MPa 4,375kNm
Idling Fig.1 shows the pump unit when idling. The control valve, 3, and the solenoid valve, 1, are kept in center position by spring load when no steering signal is given. Fig. 2
Emergency Operation Solenoid - Pilot Valve Safety Relief Valve
2) Pump Unit Type: Screw Pump “Leistrizs” type: Revolution: Capacity at 3500rpm: Relief valve setting: Max. Temperature System: Solenoid Valve:
PPSMI 3” L3MF90/112 3500rpm 1400l/min 7MPa 70℃ Vickers 24V DC
3) Oil Capacity Rudder Actuator: Pump units: Int. Storage Tank:
Steering After approximately one second, the control valve (3) is moved over to its end position, see fig.3 the oil-flow from the pump has now free passage from channel(1) into pipe(B) leading to the actuator. The return oil from the actuator flows through pipe(A) and has free passage to channel(2) and back to the suction side of the pump.
During emergency operation the solenoid valves (1) can be manually operated by means of manual controls on the solenoid valves. NOTE “Local/Remote”-switch, S3, on starter cabinets, has to be in local position during emergency operation
By-pass Valve
A, Return Oil From Actuator B, Working Press To Actuator
Control Valve
1 2 Pump Pressure Return To Pump when Steering Begins
Fig. 4 Emergency Manual Controls Use push buttons to operate the manual controls
850litre 2900litre 3000litre
Beginning of steering (Modulated flow) Steering is carried out by operating the solenoid valve (1). Fig.2 on the diagram shows the beginning of the steering process when the left solenoid is operated.
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.11.1a Turbine Generators Control Oil System
Main Steam Inlet Main Stop Valve Limit Switch for ESV Close (ACB Trip)
SHUT OPEN Governor Valver
M
To Nozzle
Trip Lever
Trip Cylinder
UG10D Woodward Governor
Limit Switch for GOV. Valve Full Open Hydraulic Servo Motor
Limit Switch for Overspeed Indication Solenoid Valve
Starting Lever
Reset Knob
To L.O. Tank
Orifice
Control oil Strainer
To L.O. Tank Press. Adjust. Valve For Lub. Oil
To Bearings Press. Adjusting Valve For Control Oil
Check Valve Main L.O. Pump
To L.O. Tank Duplex L.O. Stariner
Priming L.O. Pump
Check M Valve Cooling Water
L.O. Cooler
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Part 2 Machinery System
LNGC GRACE ACACIA 2.11 Electrical Power Generators 2.11.1 Turbine Generator 1. General Description The two turbine generators are supplied with superheated steam at boiler conditions (6.0MPa, 515°C) and normally exhaust to the main condenser. The turbines drive the generators through a single helical reduction single gearbox with forced lubrication. The turbine speed is maintained at a constant 10,000 rev/min (pinion), corresponding to a generator speed of 1,800 rev/min by a mechanical hydraulic type Woodward governor. The turbine and gearing bearings are force lubricated by a shaft driven pump, when the unit is at full speed, which takes suction from the built-in sump and discharges to the bearings, gears and control oil circuits. The steam valve is maintained in the open position by the control oil and is tripped by venting the control oil to the sump, thereby closing the steam supply valve. Prior to starting, and during the turbine run down period after the steam supply is shut off, an electrically driven lub-oil pump operates to supply oil to the systems. When starting, the oil supplied to the control system opens the steam supply valve as well as supplying the bearings and, when stopping, supplying oil to the turbine and generator bearings as the turbine runs down. The electrically driven lub-oil pump can be operated in the manual or automatic modes, according to circumstances and requirements.
1) Lubricating Oil System The generator turbine is equipped with a lubricating oil system. The oil piping arrangement is made up of a high pressure line foe the control oil and of a low pressure line for the bearing and the reduction gear lubrication. Oil is sucked from the oil tank in the common bed and pressurized by the main oil pump and adjusted its pressure by the oil pressure adjusting valve and supplied to the high pressure line for the control oil and of the low pressure line for the lubrication. (1) Main oil pump The main oil pump is of the gear type. The pump is driven by the turbine reduction gear wheel shaft through the gear. A valve serving as the safety valve is fitted on the pump casing. The valve is composed of the spindle and spring, and regulates the pump delivery pressure directly.
Machinery Operating Manual and stopped automatically. In case the switch of the starter is “AUTO”, the pump is started automatically at abt. 0.04MPa of the bearing oil pressure and stopped automatically at 0.09~015MPa
In the case of excessively high pressure in packing steam reservoir piping, the steam from the gland packing of high pressure side is bled into the packing steam reservoir piping, surplus steam can be sent to the condenser through the packing steam spill valve.
(3) Hand pump A hand oil pump is provided in the lubrication system and used for the turbine starting and stopping, when the priming oil pump is not available. (4) Lub. oil cooler The lub. oil cooler is of the surface cooling shell and tube type. The cooling is by fresh water. The cooling tubes are expanded at both ends into the tube sheets.
In case of excessively high pressure in packing steam reservoir piping, the steam from the gland packing of high pressure side is bled into the packing steam reservoir piping, surplus steam can be sent to the condenser through the packing steam spill valve. The steam leak from the 1st stage gland of the governing valve is led after the 2nd stage of the turbine. The steam leak from the 1st stage gland of the high press parts of the turbine is led after the 6th stage of the turbine. The steam leak from the 2nd stage gland of the high press parts and the 1st stage of the low pressure parts of the turbine and 2nd stage glands of main trip valve and the governing valve is sent to the gland condenser.
(5) Oil strainer The oil strainer is fitted on the L.O. line and control oil line. This oil strainer is duplex change-over type, therefore, it is possible to clean the strainer basket during operation. The oil strainer consists of the body and strainer basket having gauge screen and magnet. The strainer can be changed over with cock handle by setting the mark on handle root. When the strainer is changed over, it is so arranged as to fill the strainer to be used with oil by giving a few turns to the strainer uphandle and thus raising the change-over cock to a small extent and reduce the moment at the time of change-over by hydraulic balance.
The steam leak from 1st stage glands of the main trip valve is sent to the packing steam line.
Turbine Generator IAS Display
(6) Oil pressure adjusting valve A part of oil sent from the oil pump is adjusted by the control oil pressure adjusting valve to the 0.65~0.95MPa and acts as control oil, and the remaining oil is adjusted by the L.O. pressure adjusting valve to 0.1~0.15MPa and acts as lubricating oil. For adjusting valve the oil pressure, remove the cap and turn the adjusting screw. Clockwise turning of the adjusting screw makes the actuating oil pressure up and vice versa. 2) Steam System The main steam from the boiler through the main trip valve and governing valves, then, passes through the turbine stages to drive the turbine. The exhaust steam from the generator turbines is led to the condenser through the exhaust valve.
(2) Priming oil pump The priming oil pump is of the gear type and driven by the motor. The pump is used for the turbine start and stop. The pump is started
The pressure in the packing steam to the turbine gland packings of high and low pressure sides. The pressure in the packing steam reservoir piping is controlled 0.001~0.02MPa automatically.
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.11.1b Turbine Exhaust Steam System
M-10V LS
L.P Turbine
To Clean Drain Tank
M-7V
35V
With Handle & Dash Pot
Sett. 0.3 MPa
33V 34V
40V Deaerator (30 m3)
LS
From 3rd Stage Feed Water Heater Exhaust Main IAS Dump Valve I
From Main Condenser Pump
P
31V
(Astern Turbine Water Spray)
29V
28V
Control Air
83V
From Main Condensate Water System
No.2 Distilling Plant
PI
61V
From Cross Over Bleed TI
60V
PI
LS
68V
59V PX PX
Gland Condenser
19V S
PIAL DCS
VG
Control Air
Control Air
M-51V
58V
PI
TI
From Main Condensate Pump
2 - 75
57V
PI
PI
CI
TI
22V
44V
Sett. Sett. 120°C 100°C TS TS
PX PX
S
24V
PI PIAL DCS
Control Air
S
Control Air
From L.P T/B Bleeding
18V
PX
S
PI
56V
VIAL IAS
Gland Exhaust Fan
17V
Sett. Sett. 120°C 100°C TS TS
No.1 Distilling Plant
64V 1T 63V
VX
TI
62V
65V
PI
81V
25V
To Clean Drain Tank
4V
54V 3T 55V
LS
PAL IAS
2V
PS
To Clean Drain Tank
PI
82V
To Clean Drain Tank To Steam Drain Line To Atoms. Drain Tank
TI
0.18 MPa Pressure Control Valve
70V
9V
P
53V 52V
No.1 Main Feed Water Pump
To Clean Drain Tank To Steam Drain Line To Atoms. Drain Tank
No.2 Main Feed Water Pump
I
ORI-3 46V
IAS
PIAHL IAS
51V
Control Air
77V
78V
PX
To Atmospheric Drain Tank Steam Drain
23V
67V 2T 66V
H.P Turbine From Main Steam Supply
27V
PX PI
To Auxiliary Condensate
To Clean Drain Tank
7V
49V
From Main Condensate Water System
LS
Gland Steam Receiver
To Clean Drain Tank
PIC IAS
No.1 Generator Turbine
VX
TI
PX
32V
On E.G.B. VG
37V
PX
Control Air
M-8V
VS
47V
From Main Condensate Water System
S
PS
VS
VIAL IAS
To Auxiliary Condensate
IAS Dump Valve Interlock
PIC IAS
Spill Control Valve
PIAHL IAS
20V
Main Condenser
21V
PX
Reducing Valve
Steam Header Make-up Control Valve
41V
LS
PX
No.2 Generator Turbine
M
43V LS
42V
616LL VS I-VS-131 : For Steam Dump Valve Shut-off I-VS-131 I-VS-132 : For St-by Vacuum VS Pump Auto Start I-VS-132 At M/T Warming Mode VS Alarm Point : 75℃ TI I-VS-12 TI TX IAS VS On E.G.B. VG
To Dump Piston V/V(T-730V) Inter-lock
48V
From Main Condensate Water System
Spill Control Valve
71V
Make-up Control Valve
Control Air
39V
38V
Steam Header
From Excess Steam Dump Valve
PIAHL IAS
IAS
M
36V
Reducing Valve
50V
Control Air
To Safety Manifold Vent Line
Sett. 0.07 MPa
72V
IAS
Control Air
Sett. 0.07 MPa
75V
Control Air
76V 4T 69V
From 0.98 MPa Steam System
M-50V To Atmospheric Drain Tank
To Atmospheric Drain Tank
Key Superheated Steam Line Desuperheated Steam Line Exhaust Steam Line Condensate Line Air Line Drain Line
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual 3. Control and Alarm Settings
2. Operating Procedures 1) Starting (1) Confirm the steam source and electric source are ready for operation. (2) Check all gauges indicating zero point.
(17) Open the governor valve by the starting lever. Confirm the governing valve opened.
IAS Tag No.
Description
Setting
TG091
1 T/G ALT AFT BRG TEMP H
90℃
TG089
1 T/G ALT FWD BRG TEMP H
90℃
T/G049
1 G/T EXH SIDE BRG TEMP H
75℃
TG901SW
1 G/T GLAND STM PRESS H/L
0.06/0.001MPa
TG071
1 G/T LO INLET PRESS L
0.06MPa
TG070
1 G/T LO INLET TEMP H/L
55/30℃
TG029
1 G/T MAIN STEM IN TEMP L/LL
TG092
2 T/G ALT AFT BRG TEMP H
90℃
(21) Close the drain valve on the main stop valve.
TG090
2 T/G ALT FWD BRG TEMP H
90℃
(22) Adjust the voltage and frequency. Put the turbine speed in parallel with the other generator with the synchronizer on the electric panel.
T/G052
2 G/T EXH SIDE BRG TEMP H
75℃
TG904SW
2 G/T GLAND STM PRESS H/L
0.06/0.001MPa
TG074
2 G/T LO INLET PRESS L
0.06MPa
TG073
2 G/T LO INLET TEMP H/L
55/30℃
TG030
2 G/T MAIN STEM IN TEMP L/LL
(18) Open the main stop valve by hand. Start the turbine gradually and drive at about 400 rpm and keep it for about 25 min. for warming. Afterwards, increase the turbine speed till the rated speed in 20~30min.
(3) Check the oil level in oil tank at “NORMAL”. (4) Check the circuit breaker is open.
Confirm delivery pressure of the main oil pump and bearing oil pressure increase as the turbine speed increase.
(5) Confirm the main stop valve, exhaust valve and packing steam valve are closed.
(19) Fully open the main stop valve after confirming the governing operation of turbine.
(6) Start the priming L.O. Pump. And Confirm the bearing oil pressure reaches approx. 20~30kPa.
(20) Close the drain valves on main steam line.
(7) Open the cooling water inlet and outlet valve on L.O. Cooler. (8) Start the cooling water pump and send the cooling water to the L.O. Cooler.
(23) Shift the load gradually. (9) Open the vent valves on the water heads of the L.O. Cooler and confirm the cooling water is flowing.
2) Stopping
(10) Check the steam pressure and temperature before the main stop valve. Don’t start the turbine if the steam press. And temp. are lower than normal value.
(1) Shift all the load to the other generator.
(11) Supply the air to the sealing controller and check the sealing steam supply. Confirm the packing steam pressure 1~2 kPa.
(3) Shut the main stop valve by the handle or hand trip lever. Confirm the priming L.O. Pump starts automatically when the turbine speeds down.
300/280℃
300/280℃
(2) Cut off the circuit breaker.
(12) open the needle valve for gland steam exhaust. (4) Open the drain valves on main steam line. (13) Fully open drain valves of the main stop valve and on main steam piping. (14) Put turning device on. After turning, take off the turning device fully after turning. (15) Remove air gathering in the governor if the turbine has been in a stand still for a week or longer. Set the knob of load limiter to the indication of “10”, and move the governor output shaft back and forth completely, and air gathering in the governor can be removed. (At this time, the load indicator moves “0” to “10”). Carry out this procedure two or three minutes.
(5) Open the drain valve of the main stop valve and the casing draining valve. (6) Open the drain valve of exhaust valve. (7) Rotate and turn the shaft. Carry out the turning for 120 min. or over. (8) Stop the sealing steam supply and Cooling water pump. (9) Stop the Priming L.O. Pump. Closed all valves.
(16) Set the air synchronizer to the indication of “0” by turning the synchronizer.
2 - 76
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.11.2a Diesel Generator Engine
156V Near G/E M.D.O Service Tank Top
LS
LAL IAS
W-ORI-2
To Clean Drain Tank
From M.D.O Purifier
G/E M.D.O Service Tank (30 m3)
126V
From F.W Hyd. Tank
Finned Tube Pipe (100A)
160V
157V
D/G Cooling Fresh Water Expansion Tank (0.5 m3)
102V 101V
158V
To M.D.O Purifier Supply Pump 140V
To Deck Scupper
11S (60 Mesh)
Near 2nd Deck
To Boiler F.O Pump Suction DPI
105V
Key Fresh Water Line
FI
FI IAS
104V
Diesel Oil Line
(A)
103V
141V
Air Line Lubricating Oil Line
Electric Heater PI TI
48V
No.2 Generator Engine (Hyundai-B&W Model : 7L27/38) 154V
PX
115V
3V 106V
5V
Alarm Box
LAH MC
No.1 Generator Engine Air Reservoir (0.5 m3 x 2.5 MPa)
TIAH IAS
TX
IAS
145V PI TI
I
P
Control Air
144V
151V
165V
143V
49V
PI
No.1 Generator Engine (Hyundai-B&W Model : 7L27/38) W-ORI-3
PIAL MC
146V (A)
PI TI
From L.O System
120V 153V
IAS PS
PX
114V
111V
Fuel Leakage
LS
CI
138V
(A)
Alarm Box
147V
From Generator Engine Starting Air Compressor
122V
TX
109V
141V
(A) PI
118V
No.2
CI 121V
LS
DPS PI TI
4V
Fuel Leakage
149V
142V
W-ORI-4
PIAL MC
45V 46V
124V
From L.O System
148V
TI
No.1 G/E F.W. Cooler (100%)
PI
123V
150V
(A)
No.2 G/E F.W. Cooler (100%)
TI
)A(
CI
143V
164V
163V 162V
161V
Chemical Dosing Tank (20 L)
PI TI
No.2 Generator Engine Air Reservoir (0.5 m3 x 2.5 MPa)
Jacket Preheating Unit
)A(
Drain Line
(A)
LAH MC
137V (A)
No.1 DPS
G/E M.D.O Service Pump (2.88 m3/h x 0.4 MPa) To Oily Bilge Tank
2 - 77
To F.O. Drain Tank
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.11.2 Diesel Generator Engine
Only a one string cooling water system to the engine is required. The water in the low temperature system passes through the low temperature circulating pump which drives the water through the second stage of the charge air cooler and then through the lubricating oil cooler before it leaves the engine together with the high temperature water.
1. General Description Under normal circumstances, the diesel generator will be used as a stand -by unit to the turbine generators. The main diesel generator can be used in parallel with them when the ship is on cargo load/unload and port in/out operation.
The high temperature cooling water system passes through the high temp. Circulating pump and then through the first stage of the charge air cooler before it enters the cooling water jacket and the cylinder head. Then the water leaves the engine with the low temperature water.
The main switchboard control will provide facilities for monitoring the voltage, frequency, power and phase as well as manual facilities for synchronization, speed and voltage adjustment.
Both the low and high temperature water leaves the engine through separate three-way thermostatic valve which control the water temperature.
1) Engine Engines with the type designation 7L27/38 are turbocharged, unidirectional, four-stroke, in-line engines with a cylinder bore of 270 mm and a stroke of 380 mm. They are used for marine propulsion and auxiliary applications, and as stationary engines in power stations. The characteristic features of the larger engine types of MAN B&W Diesel AG’s production program have been adopted for this engine. The engine is moderately supercharged by means of one exhaust gas turbocharger and a two stage air cooler. When viewed on the coupling end, the exhaust gas pipe is located at the right (exhaust side), and the charge air pipe is at the left (exhaust counter side). The engine has two camshafts. One of them is used for scavenge/ exhaust valve actuation on the exhaust side, the second one serves to drive the injection pumps on the exhaust counter side. Hydraulically actuated adjusting devices permit adjustment of both the valve timing and the injection timing, depending on the design ordered. The turbochargers and charge-air coolers are at the free engine end of the engine on generator engines. Cooling water and lub-oil pumps are driven via a drive unit also on the free end of the engine. Engines of the type L27/38 have a large stroke/bore ratio and a high compression ratio. These characteristics facilitate an optimization of the combustion space geometry and contribute to a good part-load behaviour and a high efficiency. The engines are equipped with MAN B&W turbochargers of the NR type. 2) Cooling Water System The cooling water system consists of a low temperature system and a high temperature system Both the low and the high temperature systems are cooled by fresh water.
It should be noted that there is no water in engine frame 3) Lubricating Oil System All moving parts of the engine are lubricated with oil circulating under pressure. The lubricating oil pump is of the helical gear type. A pressure control valve is built into the system. The pressure control valve reduces the pressure before the filter with a signal taken after the filter to ensure constant oil pressure with dirty filters. The pump draws the oil from the sump in the base frame. And on the pressure side the oil passes through the lubricating oil cooling and the full=flow depth filter with a nominal fineness of 15microns. Both the oil pump, oil cooler and the oil filter are placed in the front-end box. The system can also be equipped with a centrifugal filter. And this filter purifying L.O from L.O sump tank and return back to L.O sump tank. Cooling is carried out by the low temperature cooing water system and temperature regulation effected by a thermostatic 3-way valve eon the oil side. The engine is a standard equipped with an electrically driven prelubricating pump. 4) Diesel Oil System The engine is started by means of a built-on air driven starter. The compressed air system comprises a dust strainer, main starting valve and pilot valve which also acts an emergency valve, making it possible t start the engine in case of a power failure. 5) Compressed Air System The engine is started by means of a built-on air driven starter. The compressed air system comprises a dust strainer, main starting valve and a pilot valve which also acts as an emergency valve, making it possible to start the engine in case of a power failure. 6)
The turbine wheel of the turbocharger is driven by the engine exhaust gas, and the turbine wheel drives its compressor, which is mounted on the common shaft. The compressor draws air from the engine room through air filter. The turbocharger forces the air through the charging air cooler to the charging air receiver. From the charging air receiver the air flows to each cylinder through the inlet valves. The charging air cooler is a compacted two-stage tube-type cooler with a large cooing surface. The high temperature cooling water is passed through the first stage of the charging air cooler and the low temperature water is passed the second stage. At each stage of the cooler the water is passed two times through the cooler, the end covers being designed with partitions which cause the cooling water to turn. From the exhaust valves, the exhaust gas is led through to the exh. gas receiver where the pulsatory pressure from the individual cylinders is equalized and passed in to the turbocharger as a constant pressure, and further to the exhaust outlet and silencer arrangement. The exhaust gas receiver is made of pipe sections, one for each cylinder, connected to each other by means of compensators to prevent excessive stress in the pipes dye to heat expansion. To avoid excessive thermal loss and to ensure a reasonably low surface temperature the exhaust gas receiver is insulated. 7) Monitoring and Control System All media systems are equipped with temperature sensors and pressure sensors for local and remote reading. For remote control only two cables are necessary; one for modbus safety and one for modbus monitoring. On the local monitoring module, the pressure, temperature and rpm are illustrated by mans of bar graph. On the display will be indicated whether it is the working hours, load in per cent, pressure, temperature or rpm which is measured. To ensure precise monitoring, the static indications will appear by means of a lighting diode placed in the middle of the bar graph and dynamic indications will appear by means of a normal bar graph on the display. The engine has as standard shut-down function for low lubricating oil pressure and high cooling water temperature, and for overspeed and emergency stop.
Turbocharger System The turbocharger system of the engine, which is a constant pressure system, Consists of an exhaust gas receiver, a turbocharger, a charging air cooler and a charging air receiver.
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.11.2a Diesel Generator Engine
156V Near G/E M.D.O Service Tank Top
LS
LAL IAS
W-ORI-2
To Clean Drain Tank
From M.D.O Purifier
G/E M.D.O Service Tank (30 m3)
126V
From F.W Hyd. Tank
Finned Tube Pipe (100A)
160V
157V
D/G Cooling Fresh Water Expansion Tank (0.5 m3)
102V 101V
158V
To M.D.O Purifier Supply Pump 140V
To Deck Scupper
11S (60 Mesh)
Near 2nd Deck
To Boiler F.O Pump Suction DPI
105V
Key Fresh Water Line
FI
FI IAS
104V
Diesel Oil Line
(A)
103V
141V
Air Line Lubricating Oil Line
Electric Heater PI TI
48V
No.2 Generator Engine (Hyundai-B&W Model : 7L27/38) 154V
PX
115V
3V 106V
5V
Alarm Box
LAH MC
No.1 Generator Engine Air Reservoir (0.5 m3 x 2.5 MPa)
TIAH IAS
TX
IAS
145V PI TI
I
P
Control Air
144V
151V
165V
143V
49V
PI
No.1 Generator Engine (Hyundai-B&W Model : 7L27/38) W-ORI-3
PIAL MC
146V (A)
PI TI
From L.O System
120V 153V
IAS PS
PX
114V
111V
Fuel Leakage
LS
CI
138V
(A)
Alarm Box
147V
From Generator Engine Starting Air Compressor
122V
TX
109V
141V
124V
LS
DPS PI TI
4V
Fuel Leakage
149V
142V
W-ORI-4
PIAL MC
45V 46V
(A) PI
118V
No.2
123V
From L.O System
148V
TI
No.1 G/E F.W. Cooler (100%)
PI
143V
162V
150V
(A)
No.2 G/E F.W. Cooler (100%)
TI
)A(
CI
CI 121V
163V
164V
161V
Chemical Dosing Tank (20 L)
PI TI
No.2 Generator Engine Air Reservoir (0.5 m3 x 2.5 MPa)
Jacket Preheating Unit
)A(
Drain Line
(A)
LAH MC
137V (A)
No.1 DPS
G/E M.D.O Service Pump (2.88 m3/h x 0.4 MPa) To Oily Bilge Tank
2 - 79
To F.O. Drain Tank
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2. Operating Procedures 1) Starting
2) Stopping (1) Remove the load from the engine and operate it at low load.
(1) Switch on the pumps for fuel oil, lub-oil, and cooling water and prime the engine.
(2) Shut down the engine and confirm that the auxiliary LO pump starts automatically
(2) Check that all local instruments are at zero point.
(3) Open the indicator cocks and blow the engine over on air to clear the cylinders.
(3) Check that the oil level in the sump tank is a normal as required. (4) Confirm that the cooling water and LO temperature reach as required degree.
(4) Close the indicator cocks and keep the engine in the stand-by condition. 3. Control & alarm settings
(5) Start the electrically driven auxiliary lub-oil pump in auto mode. IAS Tag No.
Description
Setting
DG009
DG 1 ALT A/C AIR OUT TEMP H
120℃
(7) Check the pipe connections and pipes for leakages.
DG007
G/E 1 CFW INLET PRESS L
200kPa
(8) Check the lub-oil pressure upstream of the engine and upstream of the exhaust gas turbocharger.
DG071
G/E 1 CHARGE AIR TEMP H
65℃
DG032
G/E 1 T/C EXH GAS IN TEMP H
570℃
(9) Drain the compressed air tank and check the pressure, top up if necessary.
DG034
G/E 1 T/C EXH GAS OUT TEMP H
450℃
DG003
DG 1 AFT BRG TEMP H
90℃
(10) With the indicator cocks opened, turn the engine several revolutions using the turning gear
DG064
G/E 1 FUEL OIL INLET PRESS L
0.3MPa
DG094
G/E 1 LUB OIL INLET PRESS L
0.35MPa
(11) Disengage the turning gear and confirm turning bar is in correct stowed position.
DG078
G/E 1 LUB OIL INLET TEMP H
80℃
DG010
DG 2 ALT A/C AIR OUT TEMP H
120℃
DG008
G/E 2 CFW INLET PRESS L
200kPa
DG072
G/E 2 CHARGE AIR TEMP H
65℃
DG033
G/E 2 T/C EXH GAS IN TEMP H
570℃
(14) Ensure that the shut-off elements of all systems have been set to the in-service position.
DG035
G/E 2 T/C EXH GAS OUT TEMP H
450℃
DG004
DG 2 AFT BRG TEMP H
90℃
(15) Operate the engine at low speed for approximately 10 minutes.
DG065
G/E 2 FUEL OIL INLET PRESS L
0.3MPa
(16) Check instrumentation during the test run.
DG073
G/E 2 LUB OIL INLET PRESS L
0.35MPa
DG079
G/E 2 LUB OIL INLET TEMP H
80℃
(6) Check the running gear as well as the injection pump drive and the valve gear to verify that oil is supplied to all bearing points.
(12) Blow through the cylinders on air and check the indicator cocks for any liquid is issuing. (13) Close the indicator cocks.
(17) If the engine operates properly, load should be applied or the engines should be shut down. Prolonged idle operation is to be avoided. The engine should reach the service temperature as quickly as possible because as it suffers higher wear while cold.
2 - 80
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.11.3a Em’cy Generator Engine
Radiator Duct Flange Water Filler Cap
300
300 1,022
Engine Instrument Panel
Expansion Joint
995
Radiator
Generator ENGINE INSTRUMENT PANEL
TACH
2,576
RAISE ENGINE SPEED LOWER
HOURS CRANK MANUAL START CIRCUIT BREAKER START PUSH TO RESET RUN OFF
Unloaded 74 Loaded 68
620
Crank Shaft
1200
Fuel Pump & Governor
J/B for Coolant Heater
Fuel Filter Fuel Inlet Hose & Adapter
Fuel Return Hose & Adapter
2 - 81
Electric Starting Motor Oil Filler & Dipstick L.O. By-pass Filter
Part 2 Machinery System
LNGC GRACE ACACIA 2.11.3 Emergency Diesel Generator 1. General Description The Emergency Diesel generator is rated for 850kW at 450V, 60Hz for use in emergency or dry-dock conditions. The generator feeds the emergency switchboard and, through tie-breakers, the main switchboard. The unit will start automatically should the main running unit fail, or it can be started manually either from the emergency switchboard or engine starter panel. Under normal operating conditions, the emergency switchboard is fed from the main switchboard through a tie-breaker, with the emergency generator engine operation switch in the auto condition at the starter panel. Under these conditions, a loss of voltage in the bus bars will be sensed thus, starting the emergency generator automatically and feeding electric power to the emergency switchboard. 1) Engine The engine is a V-12 turbocharged diesel engine, running at 1,800 rev/min. The engine has an air start motor and a manual hand hydraulic system. Crankshaft, camshaft and bearings etc. are lubricated by a forced lubrication system from an engine driven gear pump. The pump draws oil from the sump pan and, after passing through a cooler and a filter, a pressure regulating valve maintains the line pressure. Heating elements are fitted to the sump to provide preheating of the lub-oil and heating elements are also fitted to the cooling water jacket. These are normally left on.
Machinery Operating Manual breaker, which is closed automatically by the engine starting sequence or manually at the emergency switchboard. Manual control of voltage is provided together with voltage, current and frequency meters at the emergency switchboard.
Fuel is supplied from the 5.0m3 emergency diesel generator oil tank located in the emergency generator room, gravity fed to the fuel injection pump. Air for starting is supplied from a separate air reservoir, which is topped up by the engine-driven emergency diesel generator starting air compressor or generator engine starting air compressors. Start air is supplied to the starter motor after initiating the operation of a solenoid valve in the line. 2) Generator The generator gives an output of 850 kW at 450 volt 3 phase 60Hz at 1,800 rev/min. The generator is a brushless type self-excitation, selfregulation system with automatic voltage regulator maintaining a constant output. A space heater coil is fitted to the generator enclosure to prevent condensation while the unit is idle. The generator is coupled to the emergency switchboard via a circuit
(4) Open the fuel tank outlet quick closing valve and ensure that there is fuel at the filters.
The Emergency Generator starter panel in the emergency generator room has two positions: AUTO and MANUAL with START and STOP pushbuttons.
(5) Check the air start receiver air pressure. Drain off any moisture.
The Emergency Switchboard EG section has three (3) selector switches: engine control mode ‘AUTO/MANUAL’, E/G mode ‘EMCY/FEED BACK’ and test switch ‘TEST/NORMAL’ for controlling the emergency generator set.
(7) Push the START button, the engine will receive a start signal.
When a no-volt signal is received at the emergency switchboard, this initiates the engine start sequence. On receipt of the signal, the lub-oil heater and generator heater are switched off, the air start solenoid operates and air is admitted to the starter motor. The generator ACB on the emergency switchboard will be closed automatically when the engine is running at the correct speed and voltage. In the MANUAL position, the generator can be started and run manually. Starting may be by manually operating the air start solenoid valve and, when the generator is running, the circuit breaker can be manually closed on the switchboard. Interlocks prevent the closure of the circuit breaker when the emergency switchboard is being fed from the main switchboard through the ACBs ELM1 and ELM2. 2. System Capacities and Ratings
An engine-mounted radiator with v-belt driven fan cools the jacket water, and an engine driven pump circulates the water through the jacket spaces.
required.
Emergency Generator Engine: Model Combustion system Aspiration Bore / stroke Firing order Emergency Generator: Rating Voltage
Cummins KTA38 Direct injection Turbocharger & after cooler 159 / 159 mm 1L-6R-2L-5R-4L-3R-6L-1R -5L-2R-3L-4R
(6) Open the receiver outlet valve and the air line to the starter-motor.
(8) When the engine is started, check instrumentation and for leaks around the engine. 2) To Start the Generator from manual hand hydraulic system (1) Carry out checks and inspections as above. (2) Set the engine starter panel switches to the MANUAL position. (3) Check that the feed tank is filled to the correct level with approved hydraulic fluid. (4) Raise pressure to between 28.1 and 35.1MPa using hand pump. (5) Pull the relay valve operating lever, the engine will be started by hydraulic power. (6) When the engine is started, check instrumentation and for leaks around the engine.
850 kW, 1062.5 kVA at p.f. 0.8 3 x 450V
3. Operating Procedures 1) To Start the Generator Only at the engine starter panel.: (1) Check the engine lub-oil sump level and top up as required. (2) Set the engine starter panel switches to the MANUAL position. (3) Check the fuel tank level, check for water and top up the tank as
2 - 82
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
Illustration 2.12.1a Distribution and Loading
2 - 83
Part 2 Machinery System
LNGC GRACE ACACIA 2.12 Electrical Power Distribution 2.12.1 Distribution and Loading 1. Generating Plant The electric power generating plant consists of the following: Turbine generator No. of sets: Rating:
2 6,600 volt, 3 Ph, 60 Hz, 4,812.5KVA
Diesel generator No. of sets: Rating:
2 6,600 volt, 3 Ph, 60 Hz, 2,437.5KVA
Emergency diesel generator No. of sets: 1 Rating: 450 volt, 3 Ph, 60 Hz, 850 kW 2. Introduction One turbine generator is used during normal sea going conditions. Two generators are required when: Maneuvering with bow thruster in use Cargo loading Cargo discharging The emergency generator has sufficient capacity to supply the auxiliaries required to start a diesel generator in the event of total power failure. All four generators can operate in parallel, but not with the emergency generator. The emergency generator power can be fed back to a dead main switchboard. The emergency generator will start automatically in the event of a blackout and feed the emergency switchboard. 3. Power Distribution System (1) General Description The main switchboard is situated in the main switchboard room. The main switchboard, under normal operating conditions, feeds the emergency switchboard, which is situated in the emergency switchboard room. The emergency switchboard can be supplied from either 440V feeder panel via interlocked breakers. The main switchboard is divided into two parts. They can be operated independently, but are normally linked together by a bus tie breaker on each switchboard. One turbine generator supplies each switchboard. The diesel generator can be connected via a breaker on either switchboard, which are provided with separate synchronising panels. Each switchboard supplies its respective group starter panel.
Machinery Operating Manual A power management system controls the starting and stopping of the diesel generator and the connection and load sharing of the generators. If a failure occurs with any of the turbine generators, shedding nonessential loads and auto starting the diesel generator can reconfigure the power distribution. Panel boards are provided in suitable positions for the supply of power to the various power, heating, lighting, communication and navigation equipment throughout the vessel.
(4) Emergency Switchboard This switchboard is normally supplied from the main switchboard, but in an emergency is supplied from the emergency generator. During refit it would be supplied from the shore power connection. The emergency switchboard supplies emergency equipment and duplicates back up units. (5) Feeder Circuit Breaker
Two 440V cargo switchboards supply the cargo pumps. The other large motors and group starter panels are supplied from the 440V main group starter panels directly and power for other smaller power consuming devices are supplied through group starter or distribution panels, supplied from the 440V main switchboard. Each distribution circuit, in general, is protected against overcurrent and short circuit current by a moulded case circuit breaker fitted on the switchboard or panel board, with inverse time overcurrent trip and instantaneous trip. Each steering gear motor is fed from an independent circuit, two sets of steering gear motor are connected to the main switchboard and the other is connected to the emergency switchboard. A general service battery charging and discharging panel supplies the alarm monitoring system along with other essential low voltage services. Each supply system is provided with a device for continuously monitoring the insulation level to earth, giving an audible and visual indication of an abnormal low insulation level. 440V/220V transformers supply the normal and emergency 220V distribution systems. Each of the 220V feeder panels can be fed from each of the 440V feeder panels. The galley and laundry equipment has an isolated supply from the main switchboard through a 440V/440V transformer. The galley and laundry 220V services are supplied in a similar manner through a 220V/220V transformer.
The feeder circuits fed from the 440V feeder panel of the switchboard are protected by a moulded case circuit breaker with inverse time thermal over current trip, instantaneous magnetic trip and short circuit current interruption features, except the steering gear motor feeders, which are protected against short circuit only. The AC220V feeder circuit is protected by a moulded case circuit breaker with inverse time thermal over current trip, instantaneous magnetic trip and short circuit current interruption features. The moulded case circuit breakers for main and emergency switchboard are of the plug-in type, so that the breakers may be removed from the panel front without de-energising the main busbar. However, the moulded case circuit breakers for group starter panels and distribution panels are of the fixed type. (6) Automatic Synchronising Control An automatically controlled synchronising apparatus, which consists of the automatic speed matcher and the automatic synchroniser, is provided for the ship’s service generator sets. The automatic speed matcher equalises the generator frequency with busbar frequency. The automatic synchronizer energises the circuit breaker to connect two circuits in parallel at the moment when both phases coincide. (7) Automatic Power and Frequency Control
A shore connection is provided at the emergency switchboard to supply power to the main and emergency 440V switchboards, either independently or simultaneously
An automatically controlled power and frequency control system is provided for each ship’s service generator. The power management system controls the effective output and frequency of the generators operated in parallel.
(2) Switchboards The switchboards are of dead front box frame construction without a bottom plate and have hinged front panels that can be opened without disturbing the meters, pilot lamps, etc. mounted on them. Busbars, cubicle rows and tiers are segregated so that a fault in one cubicle cannot spread to another. A synchronising panel is supplied on each switchboard.
(8) Motors The 440V motors, in general, are of the squirrel cage induction type with a standard frame designed for AC440V three phase 60Hz, except the motors for domestic service and small capacity motors of 0.4kW or less.
(3) Cargo Switchboards Two switchboards are dedicated to cargo related auxiliaries. These switch-boards can be supplied from either 440V feeder panels or the emergency switchboard. In the case of main power system failure, the cargo pump switch-boards can be fed from the Emergency Switchboard.
2 - 84
Where continuous rated motors are used, the overload setting is such that the motor shall trip at 100% full load current. The motors in the engine room are of the totally enclosed fan cooled type. Stand by motors will start when no voltage or overboard is detected on the in-service motor or when the process pressure is low.
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
Illustration 2.12.1a Distribution and Loading
2 - 85
Part 2 Machinery System
LNGC GRACE ACACIA (9) AC440V Starters The starters are generally constructed in group control panels and power distribution panels. The drawings for the starter circuit are enclosed in a vinyl envelope and kept in pockets inside starters. Essential motor starters are arranged in group starter panels on the main switchboard and duplicated. Equipment starters are split between each of the main switchboard group starter panels. Control voltage of starters is AC220V or 110V. Interlocked door isolators are provided for all starters. For group starters, this switch is of the moulded case circuit breaker type which functions as both disconnecting means and overcurrent protection of the motor branch circuit. (10) Preference Trip
Machinery Operating Manual (12) Blackout Restart
Start
IAS carries out also restart of motor after the blackout. The last running motors before blackout are to be sequentially after blackout. If a control position(remote/local) of a motor is “local”, IAS doesn’t restart the motor. “No Volt” of each switchboard detects the blackout condition. The following services will start immediately on restoration of power BOG Extraction Fan Stern Tube L.O. P/P Aux. L.O. Pump for M/T Boiler Seal Air Fan D/G Engine D.O. Service Pump D/G Room Fan M/T Control Oil Pump G/E CSW Pump
SWBD Bus = No Volt Y
N
Motor Running Buffer =ON
N
Y ON Blackout Buffer *2
INHIBIT Motor Auto Start N
N
Y
*1 Motor = Running *2
ON Restart Timer
Y
Non-essential loads are interrupted automatically in case of overcurrent of any one of the main diesel generators to prevent the ship’s power failure. (11) Preferential Tripping The power management system is designed to match the generator capacity to the power requirements of the vessel. However, should overcurrent occur for any of the main generators, non-essential services will be tripped. Preferential tripping will be initiated when one or more generators are supplying the main switchboard and an overcurrent is detected. Load shedding is carried out in two stages. The following non-essential preferential trip services will be shed immediately. Group 1 (PT-1) Workshop unit cooler No.1 Elec. heater panel for S/G room Provision ref. fan No.1 Prov. ref. plant No.1 Main air cond. ref. plant ICCP (aft) P-1 panel (Workshop 440V D/B) G-1 panel (Galley 440V D/B) No.2 Elec. Heater panel for S/G room Boiler test room unit cooler No.2 Prov. Ref. plant No.2 Main air cond. Ref. plant Calorifier Group 2 (PT-2) Combi Winch W1, W2 Mooring Winch M1, M3, M5, M7 Mooring winch M2, M4, M6, When normal conditions are restored, the above breakers will have to be manually reset.
The following will start after 3 seconds M/Condensate Pump M/Condenser Vac. Pump No.1 E/R Sup. Fan No.2 E/R Sup. Fan The following will start after 6 seconds Main Central CFW Pump The following will start after 10 seconds Aux. SW Circ. Pump Main SW Circ. Pump The following will start after 15 seconds Main CSW Pump The following will start after 18 seconds Condensate Drain Pump No.3 E/R Sup. Fan No.4 E/R Sup. Fan
OFF Motor Running Buffer ON Motor Running Buffer
N
Motor = Running
Motor Start Fail Alarm for 10 Sec.
Y
Restart Timer = Time Up N SWBD Bus = No Volt
Y
N
Y
OFF Blackout Buffer *2
Blackout Buffer = ON
Available Motor Auto Start
Motor Running Buffer = ON and Motor =YRemote
N
Y Start Motor Wait 1 Sec.
End Note *1. If the parallel running timer of st-by control by disch. press. is on, the motor is regarded as stop because it will be stopped within's seconds. *2. Only applied to air compressor (star air, cont. air & g/s air comp).
The following will start after 23 seconds Boiler FO Pump E/R Exh. Fan The following will start after 28 seconds Boiler No.1 FD Fan The following will start after 34 seconds Boiler No.2FD Fan The following will start after 40 seconds ST-BY FD Fan The following will start after 46 seconds Aux. Central CFW Boost Pump
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Part 2 Machinery System
LNGC GRACE ACACIA 2.12.2 Turbine Generators Maker: Type:
Machinery Operating Manual Illustration 2.12.2a Turbine Generators
HHI-EES HSJ7 719-4P
Rotor
Stator
GOV V/V
Reduction Gear
MSV
Two turbine generators are provided. They each supply one of two main switchboards independently, but under normal conditions the two switchboards will be linked. Each generator is rated at 4,812.5KVA at AC6600V, 3Ph, 60Hz. They are of the totally enclosed, self excited, brushless type. The load voltage is kept constant by controlling the excitation current to the exciter. Output power from the stator is fed into a current/voltage compound transformer and the output of this is rectified and fed through the exciter stator windings. The magnetic field in the exciter stator induces AC in the excited rotor, which is rectified by the rotary diodes and passed to the DC main rotor windings. Initial voltage build-up is by residual magnetism in the rotor. Constant voltage control is achieved by the automatic voltage regulator, which shunts a variable current through the exciter windings via a thyristor to keep the AC stator output voltage constant. The generator is cooled by passing air over an integral fresh water cooler, using a closed circuit air supply. The cooling spaces are fitted with internal baffles to prevent water reaching the stator windings in the event of cooler leakage. Space heaters are fitted, which are energised when the generator circuit breakers are open, which protect against internal condensation during shut down periods. The breakers are normally operated by the power management system, but can be operated manually at the switchboard front. An embedded sensor monitors the stator temperature in each phase and a water leakage and temperature sensor is fitted in each air cooler. The bearings have a temperature sensor.
Exciter
Speed Sensing Relay
v
Governor
A Electric Overspeed Trip
A
Trip Signal
kw Hz
AVR
Power Management
Turbo Altermator Sensing Signal
Auto Synchroniser
Close Contactor Signal
The electric power system is designed with discrimination on the distribution system, so that the generator breaker is the last to open if any abnormalities occur.
Diesel Engine Start
A turbine generators, with the diesel generators on stand by at sea, provide electrical power. The order of the stand-by start is selected through the power management system.
No.2 D/G
Diesel Engine Start
No.1 D/G
No.1 T/G
Starting of large motors is blocked until there is sufficient power available. A diesel generator will be started to meet any shortfall. T2
Two generators will be required to operate in parallel when: -
Discharging cargo
-
Loading cargo
-
Maneuvering with bow thruster in use
D2
D1
No.2 MSBD
No.2 T/G Panel
Synch Panel
No.2 D/G No.2 Bus Panel Panel HM2 HM2LM2
M
2 - 87
No.1 Bus No.1 D/G Panel Panel
Synch Panel
HM1
6600 Volt HMBT2
T1
No.1 MSBD
HMBT1
No.1 T/G Panel 6600 Volt
HM1LM1 HM1C1
M
Part 2 Machinery System
LNGC GRACE ACACIA 2.12.3 Diesel Generator
Machinery Operating Manual Illustration 2.12.3a Diesel Generator Rotor
Stator
Maker: Type:
HHI-EES. HSJ7 715-10P
No.1 Diesel Generator
A main diesel generator is provided. It can supply both main switchboards independently, but under normal conditions the two switchboards will be linked. The generator is rated at 2,437.5KVA at AC6600V, 3Ph, 60Hz, 2sets. It is of the totally enclosed, self excited, brushless type. The load voltage is kept constant by controlling the excitation current to the exciter. output power from the stator is fed into a current/voltage compound transformer and the output of this is rectified and fed through the exciter stator windings. The magnetic field in the exciter stator induces AC in the excited rotor, which is rectified by the rotary diodes and passed to the DC main rotor windings. Initial voltage build-up is by residual magnetism in the rotor. Constant voltage control is achieved by the automatic voltage regulator, which shunts a variable current through the exciter windings via a thyristor to keep the AC stator output voltage constant.
Exciter
v
A
Local Start
kw Hz
AVR
Power Management
Local
Auto Synchroniser
Auto
No Voltage Signal Overload Signal High Load Request
Close Contactor Signal
The electric power system is designed with discrimination on the distribution system, so that the generator breaker is the last to open if any abnormalities occur. The turbine generators, with the diesel generators on stand by at sea, provide electrical power. The order of the stand by start is selected through the power management system.
Same No.1 D/G
No.2 T/G
Two turbine generators will be required to operate in parallel when: - Discharging cargo - Loading cargo - Manoeuvring with bow thruster in use A diesel generator will start under the following conditions: - Busbar blackout (if the generator is in stand-by mode) - Load dependent start. - Start request from heavy consumers. - Over-current on running generator. - Boiler tripped or low-low steam pressure at turbine generators. - Standby start based on frequency (58.5 Hz 10 sec delay)
Switchboard Panel Diesel Engine Abnormal
A
The generator is cooled by passing air over an integral fresh water cooler, using a closed circuit air supply. The cooling spaces are fitted with internal baffles to prevent water reaching the stator windings in the event of cooler leakage. Space heaters are fitted, which are energised when the generator circuit breakers are open, which protect against internal condensation during shut down periods. The breakers are normally operated by the power management system, but can be operated manually at the switchboard front. An embedded sensor monitors the stator temperature in each phase. A water leakage and temperature sensor is fitted in each air cooler. The bearings have a temperature sensor.
Starting of large motors is blocked until there is sufficient power available. A diesel generator will be started to meet any shortfall.
Em'cy Stop
Initiate Start
No.2 D/G
T2
No.1 D/G
D2
D1
No.2 MSBD
No.2 T/G Panel
Synch Panel
No.2 D/G No.2 Bus Panel Panel HM2 HM2LM2
M
No.1 T/G
No.1 Bus No.1 D/G Panel Panel
Synch Panel
HM1
6600 Volt HMBT2
T1
No.1 MSBD
HMBT1
No.1 T/G Panel 6600 Volt
HM1LM1 HM1C1
M
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.12.4a Battery Charger Alarm Display Monitor
Alarm & Display Monitor
ERROR MODE
ERROR MODE ENTER
SET
UP
ALARM SETTING MODE SYMBOL P/F O/C H/V L/V E/L
E.Q/ FLOAT
DOWN
CHARGING
DESCRIPTION INPUT POWER ALARM OUTPUT OVER CURRENT ALARM OUTPUT HIGH VOLTAGE ALARM OUTPUT LOW VOLTAGE ALARM EARTH LEAKAGE ALARM
2 - 89
B/Z STOP/ RESET
DISPLAY MANU
OPERATING MODE
ALARM BUZZER
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.12.4 Batteries & Battery Charger
2. Battery 1) General
1. Battery Charging Discharging Board 1) General The main DC24V system is supplied by the charge/discharge board. In normal operation the battery charge/discharge switchboards can be fed either from the emergency 440V switchboard or the No.1 440V switchboard In the event of power failure, the 24V system is supplied by two banks of batteries automatically. When the AC source is first switched to the charging/discharging board, or reconnected after a source failure, battery charging is switched to equalising mode, reverting to floating charging after 1 hour of equalising charging. An operator can select the equalising charging method with the push button switch. The equalising charging reverts automatically to floating charging after an 8 hour equalising charging period.
The Lead-Acid battery cell consists of positive electrode, negative electrode, insulators, electrolyte, cell container and other parts. Except for the cell container, insulator and gaskets, the cell is built up of nickelplated steel to withstand the mechanical damage inescapable in practical service. The pocket type positive and negative plates are used for the electrode. In the pockets, the active materials are firmly contained. The positive active material is nickel hydroxide and in order to give necessary conductivity, a small quantity of graphite is added. The negative active material is finely divided cadmium powder with an addition of iron powder to prevent caking of the material. The insulator is made of high quality vinyl chloride to avoid any risk of damage or erosion by the electrolyte for a long period of service. The electrolyte is a mixture of chemically pure potassium hydroxide and purified water. The specific gravity of the electrolyte is 1.21 at 20oC. 2) Capacities and ratings
If the bus voltage is higher than 28V when the equalising charging is turned on, the voltage-dropper which reduces feeder voltage is turned on and then when the equalising charging is finished the voltage-dropper is automatically turned off.
Capacity Type Rating
: DC24V. 300AH x 2sets : Lead Acid Sealed : 10Hour Discharging
2) Capacities and ratings Maker No. of sets Equalizing Voltage Floating Voltage Electric Power
: : : : : :
IP Grade
:
SEUN ELECTRIC 1 set DC28V DC26.7 ~ 27.2V AC 440V, 3phase, 60Hz DC rated current : DC24V, 150A Max. charging – 200A IP 22
3) Alarm and Indication Lamps as follows (1) Input Power Fail (Setting Point : 50sec) (2) Earth Leakage (Setting Point : 5kΩ) (3) Over Current (Setting Point : 157.5A) (4) Output Under Voltage (Setting Point : 21.6V) (5) Output Over Voltage (Setting Point : 30.8V)
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA 2.12.5 Un-Interruptible Power Supplies
and remains in that mode until the failure is corrected and the UPS is put back into service.
Figure 3 show the path of electrical power through the UPS system when the UPS is operating in Bypass mode.
1. Understanding Operation 3. Battery Mode Operation The UPS functions automatically to supply AC electrical power to the critical load. The UPS always operates in one of three modes. y In Normal mode the critical load is supported by the inverter, which derives its power from rectified utility AC power. In this mode, the rectifier also provides charging current for the battery. y In battery mode, the battery cabinet provides DC power, which maintains inverter operation. The battery supports the critical load. y In Bypass mode, the critical load is directly supported by the utility. The UPS continually monitors itself and the incoming utility power, and automatically switches between these modes as required, with no operator intervention. The sophisticated detection and switching logic inside the UPS ensures that operating mode changes are automatic and transparent to the critical load. 2. Normal Mode Operation
The UPS transfers to Battery mode automatically if a utility power outage occurs, or if the utility power does not conform to specified parameters. In battery mode, the battery provides emergency DC power, which the inverter converts to AC power. When the UPS switches to Battery mode, its alarm indications depend on the cause and on the battery charge state. The length of time the system can operate in battery mode depends on loading and the battery supply capacity.
Input
~
=
Inverter
=
~
Load
Battery
Figure 3 Bypass Mode Figure 2 shows the path of electrical power through the UPS system when it is operating in Battery mode.
Rectifier
~
Input
In Normal mode, utility AC power is supplied to the rectifier and the rectifier supplies DC power to the inverter, which then supplies the regulated AC power to the critical load. The rectifier also provides charging power to the battery. The message “Normal” appears in the status area of the panel. Figure 1 shows the path of electrical power through the UPS system when the UPS is operating in normal mode.
Rectifier
Inverter
=
=
~
Load
Battery
Figure 2 Battery Mode When the discharging battery voltage reaches the lower limit of UPS operation capability, UPS will shut down. If incoming power returns to within specified parameters, the UPS automatically returns to Normal mode, and alarm indications clear. 4. Bypass Mode Operation
Input
Rectifier
Inverter
~
~
=
=
Load
Battery
Figure 1 Normal Mode If the utility AC power is interrupted or out of specification, the UPS automatically switches to battery mode to support the critical load with no interruption. When utility power returns the Normal mode is reinstated. If the UPS system becomes overloaded, the UPS switches to Bypass mode. The UPS automatically returns to Normal mode when the error condition is cleared and system operation is restored to fall within specified limits. If the UPS suffers an internal failure, it switches automatically to By-pass mode
The UPS automatically switches to Bypass mode when it is in the following conditions. In this mode, the utility AC power is supplied directly to the critical loads through the Bypass circuit. 1) Initial Start-up 2) Output is overloaded (more than 120%) 3) UPS internal temperature exceeds the safe operation range. 4) UPS internal failure 5) “Off” switch is depressed for more than 3 seconds in the front panel. WARNING The critical load is not protected while the UPS is in Bypass mode.
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Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
Blank Page
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.13.1a Provision Refrigeration System
Meat Room -20℃ (30.0 m3) HFS-4-SS
Key Fresh Water Line Refrigerant Gas Line Refrigerant Liquid Line
Fish Room -20℃ (20.1 m3) HFS-4-SS
Vegetable Room +3℃ (40.1 m3) HFS-3
Dairy Room +3℃ (20.1 m3) HFS-1
Drain Line
GBC 12S EVR 6 GBC 10S
TS 20.45(01)
REG 10
GBC 12S EVR 6 GBC 10S
TS 21.3(02)
REG 10
GBC 12S EVR 6 GBC 10S
BMSL 8S REG 10
TS 21.3(02)
NRV 10S
EVR 6 GBC 10S
BMSL 8S REG 10
NRV 10S
KVP 15
GBC 15S
KVP 22
NRV 28S
GBC 22S
Accomm. Area (In Cold Rooms)
GBC 28S
E-1 GBC 28S
NRV 28S
E-1 GBC 28S
GBC 28S
Out Air
GBC 12S
Fan Switchboard
TS 20.45(01)
Wall Mounting
KP 1 P
P MP 55
Cooling F.W In
MF-6
KP 5
KP 5
P
P
Oil A-1 Separator GBC-28S
Compressor Switchboard
Oil A-1 Separator GBC-28S
No.1 Refrigerating
SS-3072 KP 2 P
Cooling F.W Out
HE8.0
MF-9
MF-11
E/R Area
KP 1 P
No.2 Refrigerating
B-1 GBC-28S
B-1 GBC-28S
No.1 Prov. Ref. Condenser
No.2 Prov. Ref. Condenser
P MP 55
SS-3072 KP 2 P
Cooling F.W Out Cooling F.W In
DCR 0457 Liquid Charging Valve
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Part 2 Machinery System
LNGC GRACE ACACIA 2.13 Accommodation Services 2.13.1 Provision Refrigeration System 1. General The cooling unit for the meat room, fish room, and vegetable room is provided by a direct expansion R-404A system. The plant, which is situated in the engine room on the 1st deck starboard side is automatic and consists of two compressors two condensers, and an evaporating air cooler in each of the seven cold rooms. Air in the cold rooms is circulated through the evaporator coils by electrically driven fans. The meat room and fish room evaporators are equipped with a timer controlled electric defrosting element. The frequency of defrosting is controlled by means of a defrosting relay built into the starter panel. Under normal conditions one compressor/condenser unit is in operation, with the other on stand-by but on manual start up, with all valves shut until required. The plant is not designed for continuous parallel operation of the two systems because of the risk of a transfer of Lubricating oil between the compressors. For bringing down the room temperatures after storing in tropical climates, both compressors may be run in parallel operation for a short period only.
Machinery Operating Manual sump will drop. When the system is charged to full capacity the excess oil will be separated out and returned to the sump. During the operation the level as shown in the condenser level gauge will drop. If the system does become undercharged, the whole system should be checked for leakage. When required, additional refrigerant can be added through the charging line, after first venting the connection between the refrigerant bottle and the charging connection. The added refrigerant is dried before entering the system. Any trace of moisture in the refrigerant system will lead to problems with the thermostatic expansion valve icing up and subsequent blockage.
While running: a) Check the inlet and outlet pressure gauges
2. Specification Compressor Maker: No. of sets: Model: No. of cylinder
HI-PRESS KOREA 2 SBO42 4
- High pressure control KP5
cut out 19.5 bar cut in manual reset
- Low pressure control KP1
cut out 0.9 bar cut in 1.9 bar
- Oil pressure control MP55
cut out 0.4 bar cut in manual reset time delay 60 sec
b) Cool. Water Pressure Control
cut out 0.4 bar cut in 0.8 bar
c) Check the oil level and oil pressure Condenser Model: No. of sets:
CRKF 271230 2
d) Check for leakages 2) To Put the Cold Chamber System into Operation
3. Operating Procedures (1) Open the refrigerant supply to one cooler room. 1) To Start the Refrigeration Plant
The compressor draws R-404A vapour from the cold room cooling coils and pumps it under pressure to the central fresh water cooled condenser where the vapour is condensed. The liquid refrigerant is returned through a dryer unit and filtered to the cold room evaporators.
(2) Open the refrigerant returns from the cooler room. (1) All stop valves, except the compressor suction, in the refrigerant line should be opened and fully back seated to prevent the pressure in the valve reaching the valve gland.
(3) Repeat the above for each of the cooler rooms. 4. Defrosting
The compressors are protected by high pressure, low pressure and low lubricating oil pressure cut-out switches. Each unit is also fitted with a crankcase heater. A thermostat in each room enables a temperature regulating device to operate the solenoid valves independently, in order to reduce the number of starts and the running time of the compressor. The air coolers accept the refrigerant as it expands into a super-cooled vapour under the control of the expansion valves. This vapour is then returned to the compressor through the non-return valves. When all the solenoid valves at the air coolers are closed by the room thermostats, the low suction pressure switches will stop the compressors.
(2) The crankcase heater on the compressor to be used should be switched on least three hours prior to starting the compressor.
A back pressure controlled constant pressure valve is included in the vegetable to prevent these rooms dropping too far below the normal set point. This would damage the provisions, should the inlet solenoid valve fail to close properly.
(6) Open the suction valve one turn.
Any leaks of refrigerant gas from the system will result in the system becoming undercharged. The symptoms of a system undercharge will be low suction and discharge pressures with the system eventually becoming ineffective. Bubbles will appear in the sight glass. A side effect of low refrigerant gas charge is apparent low lubricating oil level in the sump. A low charge level will result in excess oil being entrapped in the circulating refrigerant, thus the level in the
(8) Continue opening the suction valve slowly, taking care not to allow liquid into the compressor and keeping the suction pressure above the cut out point.
(3) Check that the oil level is correct.
The air coolers in the meat room and fish room are fitted with electrical defrosting i.e. the evaporator and drip trays are provided with electric heating elements. The frequency of defrosting is controlled by means of a defrosting relay built into the starter panel. The defrosting sequence is as follows:
(4) Start up the ancillaries, pumps etc. (5) Open the valves for the condenser water. Check to make sure there is sufficient flow.
(7) Start the compressor.
2 - 94
1) The compressor stops and all solenoid valves in the system close. The fans in the meat room and fish room stop working but the fans in the other rooms continue the circulation of the warm air over the coolers, in this way keeping the cooling surfaces free from ice. 2) The electric heating elements in the meat and fish room switch on. As long as the coolers are covered with ice, the melting takes nearly all of the heat supplied and the temperature of the cooler and the refrigerant is constantly kept near zero. When the ice has melted, the refrigerant temperature rises in the meat and fish rooms. When the temperature reaches the set point (approximately +10°C) of the defrosting thermostat, the heating elements are switched off
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.13.1a Provision Refrigeration System Meat Room -20℃ (30.0 m3) HFS-4-SS
Key Fresh Water Line Refrigerant Gas Line Refrigerant Liquid Line
Fish Room -20℃ (20.1 m3) HFS-4-SS
Vegetable Room +3℃ (40.1 m3) HFS-3
Dairy Room +3℃ (20.1 m3) HFS-1
Drain Line
GBC 12S EVR 6 GBC 10S
TS 20.45(01)
REG 10
GBC 12S EVR 6 GBC 10S
TS 21.3(02)
REG 10
GBC 12S EVR 6 GBC 10S
BMSL 8S REG 10
TS 21.3(02)
NRV 10S
EVR 6 GBC 10S
BMSL 8S REG 10
NRV 10S
KVP 15
GBC 15S
KVP 22
GBC 22S
NRV 28S
GBC 28S
Accomm. Area (In Cold Rooms)
NRV 28S
E-1 GBC 28S
GBC 28S
Out Air
E-1 GBC 28S
GBC 12S
Fan Switchboard
TS 20.45(01)
Wall Mounting
KP 1 P
P MP 55
Cooling F.W In
MF-6
KP 5 P
KP 5 Oil Separator
A-1 GBC-28S
Compressor Switchboard
Oil A-1 Separator GBC-28S
No.1 Refrigerating
SS-3072 KP 2 P
Cooling F.W Out
HE8.0
MF-9
MF-11
E/R Area
P
KP 1 P
No.2 Refrigerating
B-1 GBC-28S
B-1 GBC-28S
No.1 Prov. Ref. Condenser
No.2 Prov. Ref. Condenser
P MP 55
SS-3072 KP 2 P
Cooling F.W Out Cooling F.W In
DCR 0457 Liquid Charging Valve
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Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
3) The compressor starts. When the coil surface temperature has gone below the freezing point, the fans in the meat and fish start. The system is now back on the refrigerating cycle again. If the defrosting is not completed at the expiration of the predetermined defrosting period, the defrosting will be restarted by the timer and a new cycle will commence. 5. System Running Checks at Regular Intervals -
Lubricating oil levels in the crankcase
-
Lubricating oil pressure
-
Moisture indicators
-
Suction and discharge pressure and temperature and any unusual variations investigated
-
Check all room temperatures and evaporation coils for any sign of frosting
6. The following conditions register in the central alarm system: -
Power failure
-
Overcurrent trip
-
High pressure trip
-
Oil low pressure trip
-
Cold room high temperature alarms
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.13.2a Aux. Air Conditioning Plant SCV65
SCV65 Open Deck EVR 32
Air Cooler AC 3-1 Unit 3
EVR 32
Air Cooler AC 4-1 Unit 4
HSV 32
FIL 32
HSV 32
FIL 32
SCV50 SCV50
EVR 25
Air Cooler AC 3-2 Unit 4
EVR 25
Air Cooler AC 4-2 Unit 3
HSV 25
FIL 25
HSV 25
FIL 25
HSV80 HSV32 KP 15
KP 15 P
P
KP 1 P P
P
KP 1 P P
SCV 65
Purging
P MP 55
MF-11
SS-3072 KP 2 P
No.1 Compressor
Purging
Cooling F.W Out Cooling F.W In
No.2 Condenser
STA 65
MF-5
No.2 Compressor
MF-84
STA 65
MF-5
MF-84
SCV 65
P MP 55
MF-11
P
SS-3072 KP 2 P
Cooling F.W Out Cooling F.W In
No.1 Condenser
DCR 14411
DCR 14411 Liquid Charging Valve
Liquid Charging Valve
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Part 2 Machinery System
LNGC GRACE ACACIA 2.13.2 Accommodation and Air Conditioning Plant 1. General Air is supplied to the accommodation by two identical air handling units located in the accommodation on the Upper Deck. Each unit consists of an electrically driven fan drawing air through the following sections: - Mixing chamber for fresh and recirculated air - Filter - Heating section with steam - Cooling section with refrigerant R-404A - Humidifying section with steam - Water eliminator section The air is forced into the distribution trunk, which supplies the accommodation. Air may be drawn into the system either from outside, or from the accommodation via the recirculation trunk. With heating or cooling coils in use, the unit is designed to operate on 36.8% return air supply. The ratio of circulation air may be varied manually, using the damper in the inlet trunking. The inlet filters are of the washable mat type, and heating is provided by coils supplied by steam from the 6.0 barsystem. Cooling is provided by a direct expansion R-404A system. The plant is automatic and consists of two compressor/condenser/dryer units, supplying two (2) evaporator coils, in each of the two separate air handling units in the accommodation. Under emergency conditions it is possible that one compressor can serve both of the air handling units by opening the cross connections on the delivery and return lines. Note At no time must the cross connection valves be opened while both compressors are in service
Machinery Operating Manual Any leakage of refrigerant gas from the system will result to the system becoming undercharged. The symptoms of system undercharge will be low suction and discharge pressure, with the system eventually becoming ineffective.
(1) All stop valves in the refrigerant line should be opened (except for the main valve in the liquid line) and fully back seated to prevent the pressure in the valve reaching the valve gland.
A side effect of low refrigerant gas charge is an apparent low oil level in the sump. A low charge level will result in excess oil being entrapped in the circulating refrigerant gas, thus the level in the sump will drop. When the system is charged to full capacity, this excess oil will be separated out and returned to the sump. During operation, the level as shown in the receiver level gauge will drop. If the system does become undercharged the whole system pipe work should be checked for leakage. If a loss of gas is detected, additional gas can be added through the charging line, after first venting the connection between the gas bottle and the charging connection. The added refrigerant is dried before entering the system. Any trace of moisture in the refrigerant will lead to problems with the thermostatic expansion valve icing up and subsequent blockage. Cooling water for the condenser is supplied from the low temperature fresh water cooling system.
(2) Open the compressor discharge valve.
2. Specification
(8) Set the capacity regulator to minimum capacity.
Compressor Maker: No. of sets: Model: Speed No. of cylinder Condenser Model: No. of sets:
HI-PRESS KOREA 2 CMO28 1770 8
CRCK 502320 2
(3) The crankcase heater on the compressor to be used should be switched on a three hours prior to starting the compressor. (4) Check the oil level. (5) Check the settings of the compressor safety devices. (6) Start up the ancillaries, cooling water pumps etc. (7) Open the valves for the condenser cooling water. Check there is sufficient flow.
(9) Open the compressor suction valve slightly. This will prevent excessive pressure reduction in the compressor on start up, high could cause oil foaming in the crankcase. (10) Start the compressor. (11) Continue opening the suction valve slowly until fully back-seated, taking care not to allow liquid into the compressor, and keep the suction pressure above the cut out point. (12) Open the main valve in the liquid line.
Air handling unit (Normal Condition with H Model HPB-08 Air volume 21,655 m3/h Air cooler capacity 144,480 kcal/h (168.0 kW) Heater capacity 159,960 kcal/h (186.0 kW)
3) Compressor Running Checks - The Lubricating oil pressure should be checked at least daily. - The oil level in the crankcase should be checked daily.
Direct expansion coils achieve cooling of the air. The coils are fed with refrigerant from the air conditioning compressor as a superheated gas, which is passed through the condenser where it is condensed to a liquid. The liquid R404A is then fed via filter drier units to the cooling coils where it expands, under the control of the expansion valves, before being returned to the compressor as a gas.
3. Procedure for the Operation of the Air Conditioning System -
The suction and discharge pressure should be checked regularly.
1) To Start the Ventilation System (1) Check that the air filters are clean.
- The temperature of oil, suction and discharge should be checked regularly. A regular check on the motor bearing temperatures should also be kept.
(2) Set the air dampers to the outside position. The compressor is fitted with an internal oil pressure activating unloading mechanism, which affords automatic starting and variable capacity control. A high and low pressure cut out switch and low Lubricating oil pressure trip protects the compressor. A crankcase heater and cooler are fitted.
-
Check on any undue leakage at the shaft seal.
(3) Start the supply fans.
2) To Start the Air Conditioning Compressor
2 - 98
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.13.2b Main Air Conditioning Plant SCV 125
To FUC for Galley
J/B EVR 40
PS TS
J/B EVR 40
HSV 40
MLV661.25- FIL 40 6.3 EVR 40 HSV 40
AC 1-1 Unit 1
PS TS
SCV 125
PS TS
MLV661.25- FIL 40 6.3
MLV661.25- FIL 40 6.3 EVR 40 HSV 40
AC 2-1 Unit 2
PS TS
HSV 40
MLV661.25- FIL 40 6.3
SCV 100
SCV 100
EVR 32
EVR 32
HSV 32
FIL 32 TES 55- 56(02) EVR 32 HSV 32
AC 1-2 Unit 1
TES 55- 56(02)
HSV 32
FIL 32 TES 55- 56(02) EVR 32 HSV 32
AC 2-2 Unit 2
FIL 32
FIL 32
TES 55- 56(02)
Accom. Area Engine Room
SCV 65 SCV 125
Compressor
527E
Air Vent
527E
EVR 10
Condenser
SS-3072 KP2 P Purging
Receiver
Air Vent
SCV 65
SCV 65
SCV 65
Condenser
Purging
527E
Purging TES 5-5.0(02)
Purging
SS-3072 KP2 P
LUC
527E
EVR 10
LUC
SCV 65
Compressor
2xMF-84
MF-100
TES 5-5.0(02)
2xMF-84
MF-100
Receiver
Key SCV 50 SCV 50 From/To Central Cooling System
DCR 19217
SCV 50
Liquid Charge Valve
SCV 50
Fresh Water Line Refrigerant Gas Line Refrigerant Liquid Line Drain Line
2 - 99
SCV 50 From/To Central Cooling System
DCR 19217
SCV 50
Liquid Charge Valve
Part 2 Machinery System
LNGC GRACE ACACIA 4) To Stop the Compressor for Short Periods
Machinery Operating Manual procedure.
(2) Close the condenser liquid outlet valve.
(1) Throttle the suction valve until the suction pressure is slightly below atmospheric. It will be necessary to reduce the setting of the low pressure cut out.
(3) Allow the compressor to pump down the system so that the low-evel pressure cut-out operates.
(2) Connect a pipe to the oil charging valve, fill the pipe with oil and insert the free end into a receptacle containing refrigerator oil.
(4) Close the filter outlet valve.
(3) Open the charging valve carefully, allowing atmospheric pressure to force the oil into the crankcase and avoiding ingress of air.
(1) Reduce the capacity regulator to the minimum setting.
(5) Isolate the compressor motor. (4) Reset the low pressure trip. (6) Close the compressor suction valve. (7) Close the compressor discharge valve. (8) Close the inlet and outlet valves on the cooling water to the condenser. (9) Switch on the crankcase heater. 5) To Shut Down the Compressor for a Prolonged Period If the cooling system is to be shut down for a prolonged period, it is advisable to pump down the system and isolate the refrigerant gas charge in the condenser. Leaving the system with full refrigerant pressure in the lines increases the tendency to lose charge through the shaft seal. (1) Shut the liquid outlet valve on the condenser. (2) Run the compressor until the low pressure cut-out operates. (3) After a period of time the suction pressure may rise as the evaporators warm up, in which case the compressor should be allowed to pump down again, until the suction pressure remains low. It may be necessary to reduce the setting of the low pressure cut out. (4) Shut the outlet valve from the filter. (5) Shut the compressor suction and discharge valves. (6) Close the inlet and outlet valves on the cooling water to the condenser. (7) The compressor discharge valve should be marked closed and the compressor motor isolated, to prevent possible damage. 6) Adding Oil to the Compressor Oil can be added to the compressor while running by using an oil pump connected to the oil charging connection or by using the following
2 - 100
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
Illustration 2.13.3a Package Air Conditioner
2 - 101
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
2.13.3 Package Air Conditioner
2. Boiler Test Room
2) Stop the compressor.
1. General
Comprising a fan, compressor, refrigerant circuit, filters and controls, these are all self-contained and are air cooled.
3) Close the compressor stop valves on the suction and discharge lines.
Each unit consists of an electrically driven fan drawing air through the following sections: Mixing chamber for fresh and recirculated air (90%) Filter Heating coils Evaporator coils Fan The air is forced into the distribution trunk, which supplies the engine control room. The inlet filters are the washable mat type.
4) Switch off the cooling ON/OFF selection switch. (1) Model : Capacity :
HIP-3WGE Cooling Capacity – 9,000kcal/H Heating Capacity – 8,600kcal/H
Type:
Package type
Refrigerant :
R-404A
3. Work Shop
Cooling is provided by a direct expansion R-404A system. The plant is automatic and consists of two compressor, condenser units, supplying evaporator coils, one in each of the two separate air handling units in the engine room. Each compressor and condenser unit has 50% of the total capacity requirement and, under normal conditions, two compressors would be in use, each supplying their own air handling unit. Direct expansion coils achieve cooling of the air. The coils are fed with refrigerant from the air conditioning compressor as a superheated gas, which is passed through the condenser where it is condensed to a liquid. The liquid R-404A is then fed via filter drier units to the cooling coils where it expands, under the control of the expansion valves, before being returned to the compressor as gas.
Comprising a fan, compressor, refrigerant circuit, filters and controls, these are all self-contained and are air cooled.
The compressor is fitted with an internal oil pressure activated unloading mechanism, which affords automatic starting and variable capacity control. A high and low pressure cut out switch and low lubricating oil pressure trip protects the compressor. A crankcase heater and cooler are fitted.
4. Procedure for the Operation
(1) Model : Capacity :
HIP-20WGDE Cooling Capacity –54,000kcal/H Heating Capacity – 43,000kcal/H
Type:
Package type
Refrigerant :
R-404A
(1) Starting 1) Open the condenser refrigerant inlet and outlet valves.
Any leakage of refrigerant gas from the system will result in the system becoming undercharged. The symptoms of system undercharge include low suction and discharge pressure, and an ineffective system.
2) Make sure that the air filter is clean. 3) Turn on the power switch at least six hours beforehand.
A side effect of low refrigerant gas charge is an apparent low oil level in the sump. A low charge level will result in excess oil being entrapped in the circulating refrigerant gas, thus the level in the sump will drop. When the system is charged to full capacity, the excess oil will be isolated and returned to the sump. During operation, the level in the condenser level gauge will drop. If the system becomes undercharged, the whole system pipe work should be checked for leakage.
4) Start the fan. 5) Start the compressor by switching on the cooling ON/OFF selection switch. (2) Shutting Down 1) Close the condenser refrigerant outlet valve. 2) Allow the compressor to shut down on the low suction pressure trip.
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Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.14.1a Fresh Water General Service System (P)
To Ondeck F.W Service
(S)
To Galley
F.W Filling
55V SF-1
Sterilizer (3,000 L/H)
27V
67V (A)
26V 15V
11V
24V
To Deck Scupper
Pump No.1 & 2 (6 m3/h x 65 MTH)
Workshop F.W Service Wash Tub (For BLR W. Test)
Wash Tub (In Workshop)
Mineralizer (3,000 L/H)
71V 50V
PS PS PI
No.2
Sett. 0.77 MPa
20V
To Deck Scupper To Deck Scupper
61V
No.2 Distilled Plant (60 Ton/day)
No.1 Distilled Plant (60 Ton/day)
PI
38V
S
S
S
49V
FS
SX
41V
No.2
54V
40V (A)
Hot Water Circulating Pump (2 m3/h x 10 MTH)
42V (A)
47V
62V (A)
2 - 103
To Oily Bilge Separator Filling 4th Deck F.W Service (Near F.W Generator)
3rd Deck (AFT) F.W Service
3rd Deck (FWD) F.W Service 4V Chemical Store Room Shower
19V
60V
57V
64V
PI
To D/G Cooling F.W Exp. Tank
Floor F.W Service
46V 34V
PI
I.G.G Air Dryer Cleaning I.G.G Ref. Cooler
To Steering Gear Room
Calorfier (1,500 L)
To Distilled Plant Chemical Dosing Unit
To Deck Scupper
FI
To I.G.G Cooler
G/E T/C Cleaning (Container Complete)
AFT B/H
PI
Salinity Panel
FI
21V
2nd Deck F.W Service
Near G/E T/C
Sett. 0.88 MPa
48V
Salinity Panel
Carbon Filter
PI
(A)
To Deck Scupper SX
No.1
29V
PI
To B.F. & G/S Pump (For W. Spray Line Rinsing)
Casing Deck F.W Service
To I.G.G Tower Rinsing
39V
69V
To Main Cooling F.W Exp. Tank
To I.G.G Jacket Rinsing
No.1
65V
56V
(A)
(A)
25V
43V
68V
53V
S
Silver Ion Sterilizer (5,000 L/H)
E/R Toilet
28V
TI
LX
Skin for Cup Board
PI
LIAHL IAS
Fresh Water Tank (S) (- m3)
To Deck Scupper
Pump No.1 & 2 (10 m3/h x 70 MTH)
63V
LX
Water Closet
No.1
0.9 MPa Air
23V Distilled Water Tank (S) (- m3)
Sett. 0.72 MPa
Fresh Water Hydrophore Unit (2,000 L)
Steering Gear Room
LIAHL IAS
No.2
Sett. 0.72 MPa
S
Stern Tube Cooling F.W Tank
To Condensate Water Line
Wash Basin
16V
LX
Drain Line
PS PS PI
0.9 MPa Air
Distilled Water Tank (P) (- m3)
22V
(A)
Drinking Water Hydrophore Unit (1,000 L)
17V
LIAHL IAS
36V
66V (A)
Key Fresh Water Line Hot Fresh Water Line Air Line
37V
58V
Drinking Water Tank (P) (- m3)
Drinking Water Fountain
35V
51V
Steering Gear Room
LX
To Accommodation To Fresh Water Sanitary Water Hydrant Service (Compressor Room (S))
Upper Deck
Upper Deck
LIAHL IAS
To Accommodation Fresh Water Fire Fighting System
From/To Accommodation
To Purifier Operating Water System
Part 2 Machinery System
LNGC GRACE ACACIA 2.14 Fresh Water General Service Systems
Machinery Operating Manual 2.14.2 Distilled Water Filling Service System
reached.
2.14.1 Fresh Water General Service System
5) Close the air supply.
1. General
1. General
6) Repeat steps (2)~(5) until the tank is at the operating pressure, with the water level at about 75%.
Distilled water is stored in 268.4 m3 water tanks port and starboard, both equipped with level transmitters for alarm generation. The tanks can be filled either from fresh water generators or via shore connections.
Domestic fresh water and Drink water tank is stored in 197.1m3 fresh water tanks port and starboard, both equipped with level transmitters for alarm generation. Drinking water is stored in port side tank, and domestic fresh water is stored in starboard side. The tanks provide drinking water and water to general services throughout the ship. The tanks can be filled either from fresh water generators or via shore connections. Fresh water is supplied to general services via a 2,000litre hydrophore tank, pressurized to 0.65MPa. Two pumps in a duty standby configuration supply the tank. The pumps are controlled and monitored from IAS. A thermostatically controlled heater uses steam or electricity to provide hot water, which are being circulated to avoid extensive run off to get hot water at outlets.
7) Switch one hydrophore pump to automatic operation. The distilled water system serves the following: 8) Open the hydrophore tank outlet valve slowly, until the system pressurises.
-
Condensate make- up for the boilers
9) Start one hot water circulating pump.
-
Emergency feed for boiler feed pumps via valve
10) Vent air from the calorifier.
-
Spill return from condensate drain pump system
11) Start the electric heater for the calorifier.
2. Control and Alarm Settings
12) Switch the other supply pump to stand-by.
IAS No.
Description
Alarm
13) Supply steam to the calorifier when steam is available.
FW016
PORT DIST TK LEVEL H/L
4.0 / 0.7 m
FW016
PORT DWTR TK LEVEL H/L
4.0 / 0.7 m
FW015
STBD DIST TK LEVEL H/L
4.0 / 0.7 m
FW017
STBD FW TK LEVEL H/L
4.0 / 0.7 m
The fresh water system supplies the following 14) Shut down the electric heater. -
Sanitary system 3. FW Service System
-
Cooled fresh water for accommodations
-
Hot water service for accommodations
-
L.O. & D.O. purifier operating water system
-
Inert gas fan washing
- Fresh water cooling system header tank - Chemical dosing unit -
Oily water separator
- Auxiliary engine turbocharger cleaning and hot foam system 2. Preparation for the Operation of the Fresh Water System 1) Start one FW hydrophore pump. 2) Fill the hydrophore tank to about 75%. 3) Stop the pump. 4) Crack open the air inlet valve to the tank until the operating pressure is
2 - 104
Part 2 Machinery System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 2.14.3a Sanitary Discharge System Sewage Discharge Shore Connection (PORT) (STBD)
Hospital Wash Basin Flow Scupper
Funnel
Soil Pipes (P)
Hospital Soil
Waste Drainage (S)
Soil Pipes (S)
Sweat Scupper Waste From Catering Space Drain
BG-33
Provision Refrigeration Chamber
Engine Room Toilet
9V 20V To Bilge Holding Tank
7V
36V
8V
LAHH LS IAS High High Alarm for S.T.P
PS VI
2V 14V 1V
Float Type Level Gauge
LAHH IAS
LS
Flow Meter
Sewage Treatment Plant (60 Persons/day)
High Alarm LS Pump Start LS Pump Stop LS LS
CI
44V
Vacuum Pump No.2
CI
No.2 PI
No.1
26V
CI 41V
43V
PI
33V
PI
31V
No.1 Sewage Disch. Trans. Pump (10 m3/h x 25 MTH)
24V
PI
LS
42V
4V
17V
18V
Sewage Collecting Tank (10 m3)
3V
BG-32
Sweat Waste Drainage (P) Scupper Drain
10V 19V
11V
Key Sea Water Line
29V
Drain Line
2 - 105
28V
From Fire, Bilge & G/S Pump
Part 2 Machinery System
LNGC GRACE ACACIA 2.14.3 Sanitary Discharge System
Machinery Operating Manual push-button switch is operated the pump motor will run, to empty the tank for draining or cleaning until the control switch is moved to OFF.
1. General Description The Hamworthy Super Trident Sewage Treatment unit is a self contained system for the treatment of sewage from ships or rigs before it is discharged overboard and so prevent the pollution of harbour and coastal waters and inland waterways. Basically the Super Trident Sewage Treatment unit comprises a tank, divided into three water tight compartments – an aeration compartment, a settling compartment, and a chlorine contact compartment. The incoming sewage enters the aeration compartment, where it is digested by aerobic bacteria and micro organisms which are promoted in the sewage itself by the addition of atmospheric oxygen. From the aeration compartment the sewage flows into the settling compartment where the aerobic bacteria floc, known as activated sludge, is settled out producing a clear effluent which passes through a chlorinator and into the chlorine contact compartment before being finally discharged. 2. Operation Before running the machine for the first time after installation or maintenance, proceed as follows: 1) After initial installation, fill the pump with the liquid to be pumped. 2) Rotate the pump manually through at least one revolution to ensure that the pump is free to rotate. 3) Check that the motor bearings are lubricated as detailed in the motor manufacturer’s handbook. 4) Ensure that the suction and discharge line stop valves are in the “Open” position. When the system is fitted with a discharge pump and the control switch is in the AUTO position, the typical sequence of operation is as follows: -
When the liquid reaches the “High” level float switch, the pump motor is started and the liquid begins to discharge from the compartment. The pump continues to run until the liquid drops to the level of the “Los” level float switch when the motor is switched off.
-
Should the “High” level alarm float switch fail to operate for any reason, the level of the liquid will reach the “High” level alarm float switch, and actuate the alarm circuit.
-
When the control switch is moved to the HAND position and The ON
2 - 106
Part 2 Machinery System
LNGC GRACE ACACIA
Machinery Operating Manual
Part 3 Integrated Automation System (IAS) 3.1 IAS for general ................................................................................. 3 - 4 3.2 DEO Open Supervisory Station (DOSS) ........................................ 3 - 4 3.3 DOHS (DEO Open History Station)................................................. 3 - 8 3.4 DOGS (DEO Open Gateway Station)............................................... 3 - 8 3.5 DOPC ІІ (DEO Process Controller ІІ) .............................................. 3 - 8 3.6 Alarm Management .......................................................................... 3 - 9 3.6.1 Classification of Alarm .......................................................... 3 - 9 3.6.2 Alarm Acceptance Procedure................................................. 3 - 9 3.7 Alarm Printout ................................................................................ 3 - 10 3.8 Fast Alarm Function ....................................................................... 3 - 10 3.9 Data Logging .................................................................................. 3 - 10 3.10 Extension Alarm and Engineer’s Alarm.........................................3 - 11 3.10.1 Extension Alarm ................................................................ 3 - 12 3.10.2 Engineer’s Alarm and Patrolman System .......................... 3 - 15
Illustration 3.1.1a IAS Overview (System Configuration)........................................ 3 - 1 3.1.1b IAS Overview (System Connection) ........................................... 3 - 2 3.1.1c IAS Overview (Power Supply Concept) ...................................... 3 - 3 3.6a Alarm Acceptance Procedure .......................................................... 3 - 9 3.7a Alarm Printer Configuration ......................................................... 3 - 10 3.7b Example of Alarm Printout ........................................................... 3 - 10 3.8a Example of Alarm Printout ........................................................... 3 - 10 3.10a Extension Alarm and Engineer Call System ................................3 - 11 3.10.1a Layout of Group Alarm Indication........................................... 3 - 12 3.10.1b Alarm Annunciation Sequence for Machinery System ............ 3 - 13 3.10.1c Alarm Annunciation Sequence for Cargo System.................... 3 - 14 3.10.1d Duty Selector Indication for Machinery .................................. 3 - 14 3.10.1e Duty Selector Indication for Cargo .......................................... 3 - 14
Part 3 Integrated Automation System (IAS) Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 3.1.1a IAS Overview (System Configuration)
Extension VDU System (Process Monitoring only for Cargo and Machinery System)
W/H Monitoring only for Cargo and Machinery System
Ext. VDU Net (Ethernet) Ext. VDU Server
Color Hard Copier
Alarm Printer Logging Printer
20" LCD
CCR
ECR
Cargo System
Machinery System
Color Hard Copier
Alarm Printer Logging Printer
20" LCD
20" LCD
PCNS
Chief Engineer's Room DEO-Net (Ethernet) 1st Engineer's Cabin
DOPC
DOPC
DOGS
8 Sets
2nd Engineer's Cabin
3rd Engineer's Cabin
Receptacles for 4 Other Engineer's Cabins
Serial Communication For Cargo System - Custody Transfer System (CTS)(Dual) - Secondary Level Gauging System (Cargo Tanks) - VDR (Dual) - INS (Dual) - IGG - Gas Detection System - No.1 N2 Generator - No.2 N2 Generator For Machinery System - Performance Monitor - Fire Detecting System - No.1 T/G - No.2 T/G - No.1 D/G - No.2 D/G
DOHS TCP I/P OPC Communication SMS
Loading Computer
Plasma Display (50" Inches) for Cargo Overview in CCR
Ext. Alarm Panels Duty Selector : 2 Units Cargo & Machinery : 8 Panels Machinery : 10 Panels Cargo : 2 Panels
Legend DOSS : DEO Open Supervisory Station DOHS : DEO Open History Station DOGS : DEO Open Gateway Station DOPC : DEO Process Controller PCNS : PC Network Server
3-1
W/H use INS Display Instead of Hardware Panel.
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 3.1.1b IAS Overview (System Connection)
W/H
Extension VDUS
CCR
Plasma Display (50" Inches) for Cargo Overview
Ext. VDU Net (Ethernet)
OPT. CONV. OPT (2 Fibers)
IAS I/O Cabinet Room (FWD)
DOGS
DEO-Net (Ethernet) DOPC
PCNS
OPT. CONV.
DOHS
OPT. CONV.
OPT (2 Fibers)
IAS I/O Cabinet Room (AFT)
OPT. CONV.
DOPC
DOPC
OPT. CONV.
OPT. CONV.
OPT (2 Fibers)
I/O
I/O
I/O
OPT (2 Fibers)
OPT. CONV.
OPT (2 Fibers)
OPT (2 Fibers)
OPT. CONV.
OPT. CONV.
OPT (2 Fibers)
OPT. CONV.
OPT (2 Fibers)
OPT. CONV.
OPT (2 Fibers)
OPT (2 Fibers)
I/O
OPT (2 Fibers)
No.1 LVSBR
OPT. CONV.
OPT (2 Fibers)
OPT. CONV.
I/O
OPT (2 Fibers)
ECR
OPT. CONV.
DOPC
OPT (2 Fibers)
OPT (2 Fibers)
No.2 LVSBR
OPT. CONV.
DOPC
DOPC
I/O
I/O
I/O
3-2
I/O
I/O
OPT (2 Fibers)
OPT. CONV.
DOPC
I/O
I/O
DOPC
I/O
I/O
I/O
I/O
Legend DOSS : DEO Open Supervisory Station DOHS : DEO Open History Station DOGS : DEO Open Gateway Station DOPC : DEO Process Controller PCNS : PC Network Server OPT. CONV. : Optical Convertor
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 3.1.1c IAS Overview (Power Supply Concept) Power Supply Concept
W/H
CCR
Extension & Portable VDUS
Color Hard Copier Logging Printer
Alarm Printer
Plasma Display (50" Inches) for Cargo Overview
AC 220V
Battery Room (Nav.-DK)
Battery Room (Upp.-DK)
Batt
Batt
A B
A B
AC 440V/60Hz or AC 380V/50Hz (Normal)
UPS No.2 LVSBD
IAS I/O Cabinet Room (FWD)
AC 440V/60Hz or AC 380V/50Hz (Em'cy)
UPS
A B
DOHS
DOGS
PCNS
A B
UPS
UPS
ECR
Legend DOSS : DEO Open Supervisory Station DOHS : DEO Open History Station DOGS : DEO Open Gateway Station DOPC : DEO Process Controller PCNS : PC Network Server
Color Hard Copier Logging Printer
A B
UPS
B A
IAS I/O Cabinet Room (AFT)
UPS
B A PS
PS
PS
PS
DOPC
DOPC
I/O
I/O
PS
I/O
Alarm Printer
B A
PS
PS
DOPC
DOPC
I/O
I/O
No.1 LVSBR Cabinet
3-3
PS
PS
DOPC
DOPC
I/O
I/O
No.2 LVSBR Cabinet
PS
DOPC
DOPC
I/O
I/O
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA Part 3 : Integrated Automation System (IAS) 3.1 IAS for general
The Zener Barriers are applied to the 4-20mA Input/Output signals and the RTD Input signals from hazardous areas and contact barriers are applied to the contact input signals.
Each field devices can be manipulated from dedicated graphics. Operator just clicks the pre-configured devices symbol and will appear the faceplate. The clicks and enters numerical on the faceplate make him control the devices.
1. System configuration
4. Power Supply
One line alarm indication The latest alarm appears in this portion. Operator recognizes what alarm occurred during he watch the any displays without calling alarm summary. This bar is indicated on the top of screen at any time. After acknowledged the alarm, next event will be coming the area.
Integrated Automation System(IAS) consists of several human interface stations that have monitoring and control the vessel machinery and cargo sections. Following human machine interface systems are provided as IAS monitoring and control stations. Wheelhouse Human-Machine Interface Station (DEO Open Supervisory Station : DOSS) Machinery Human-Machine Interface Station (DEO Open Supervisory Station : DOSS) Cargo Human-Machine Interface Station (DEO Open Supervisory Station : DOSS) Engineer’s Cabin Human-Machine Interface Station (Extension VDU) The following figures shows system configuration of IAS Illustration 3.1.1a Indicates system configuration of IAS Illustration 3.1.1b Indicates system connection concept of IAS Illustration 3.1.1c Indicates power supply concept of IAS 2. Operating Conditions
Pressure : Temperature :
-
Level :
-
Flow : Controllers/Receivers : . Environmental Conditions
AC440V, 60Hz, 3 Phase or AC380V, 50Hz, 3Phase Voltage : ±10% nominal Frequency : ±5% nominal
Fully covered all of IAS power, except engineer’s cabin human interface station(Extension VDU), is assured by uninterrupted power supplies. A UPS is fed from normal feeding line, the other fed from emergency feeding line. The autonomy of each is 30min. Both of normal and emergency feeding power are always coming from ships power bus. On the wheelhouse station(DOSS), ECR stations(DOSS), CCR station(DOSS), DOHS, DOGS, and PCNS are used normal line in case of both feeding alive. When the normal feeding fails, those are change to emergency feeding by automatically. This change has a specific lag time then supported by small UPS to compensate the interruption during change over. -
2. Display Layout Display Call-up Toolbar Ship's Time(*1) One Line Alarm Indication
Display Main Part
System Standard Time (*2)
DOSS : DEO Open Supervisory Station DOHS : DEO Open History Station DOGS : DEO Open Gateway Station DOPCⅡ : DEO Process ControllerⅡ
3.2 DEO Open Supervisory Station (DOSS)
Accuracy of instruments for IAS -
-
1. General ±0.75% of span reading ±0.75% of thermocouples ±3.0% for resistive temperature detectors According to maker standard, but not more than ±25mm ±1.5% unless otherwise specified ±2% of set point (steady states)
DOSS is provided as the main Human-machine Interface Station (HIS). DOSS is an Marine-DEO node facilitating Window aware functionality. The DOSS has the following features. -
Display call-up toolbar Operational faceplate facility One line alarm indication Trackball pointing device High resolution display
It is fully integrated with Marine-DEO and can be a client node for DOPCⅡ and DOHS for LNGC monitoring control.
NOTE * 1 : Ship’s Time : MM / DD/ YYYY HH:MM * 2 : System Standard Time : MM / DD / YYYY (WWW) HH : MM : SS
3. Intrinsic Safety
Display call-up toolbar The toolbar allows prompt access each control and monitoring facility. Operator just clicks the intuitive icon, then call-up ideal display or pull-down menu that shows the title of displays are appeared.
MM : Month DD : Day YYYY : Year
Intrinsic safety system is to be composed in accordance with the requirements of the classification society.
Operator faceplate facility
-
Operating temperature :
-
Relative humidity : Vibration :
20 ~ 55˚C Controlled environment 10 ~ 55˚C Machinery space -20 ~ 70˚C Open deck 95% To comply with IEC92.504 requirements
3-4
HH : Hour MM : Minute WWW : Week
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA 4. Display
3. Keyboard
Figure 3.2.1 Graphic Display
The DOSS has two(2) types of keyboard. - Operation keyboard - Engineering keyboard The Engineering keyboard is used for software modification and installation only. The keyboard is furnished inside lockable drawer. The following figures indicate the layout of keyboard.
Graphic displays can be built so that the operator can monitor and manipulate the process directly from them. Both continuous and discontinuous processes can be managed from graphic displays. Basically, any data point parameter or sequence can be monitored and manipulated from any graphic display. Graphic behaviors such as blinking, color changes, bar graphs, appearance of subpictures, and numeric values can be controlled by parameters of data points
POWER GOOD FAIL
RESET
STATS
7
8
9
4
5
6
MAN
AUTO
SP
!
"
Q
W
$
=
&
*
<
>
?
E
R
T
Y
U
I
O
P
L
-
A
S
D
F
G
H
J
K
SP
Z
X
C
V
N
M
M
1
2
3
.
0
-
CAS
OUT
ENTER
ACK
SIL
Prev Page
Next Page
Close Cancel
Prev Disp
Next Disp
Last Cancel
Message Clear
ALARM button
Used to indicate process alarm status and to invoke alarm summary display
3.
SYS button
Used to indicate system alarm status and to invoke system status display
4.
MESSGE button
Used to indicate message status and to invoke message summary display
5.
SEQ button
Used to indicate sequence events status and to invoke sequence event summary display
6.
PREVIOUS button
Used to go back to previous display
7.
NEXT button
Used to go to next display
8.
GRAPHIC button
Used to invoke graphic display
9.
GROUP button
Used to invoke group display
10
TREND button
Used to invoke trend display
11.
DETAIL button
Used to invoke detail display
12.
REPORT button
Used to invoke report menu display
13.
SYS button
Used to invoke system configuration/ command menu display
14.
PRINT button
Execute
TAB Alpha Shift
2.
STATS
EVENT
CONF
Used to activate CRT screen print
Figure 3.2.2 Group Display The group and detail displays shows parameter and permit operators actions. The group display show information for up to 8points. These face plate for PID controller, pump / valve control, etc.
Display Items
Contents
Free Memory
Shows free main memory in DOSS
Free Disk (D:)
Shows free disk space in D Drive of DOSS
Date and Time
Shows Current Date and Time
Mode Indicator
Shows whether parallel operation keyboard is in High-speed mode or ordinary mode.
. Access Indicator
Level
Shows current Access level
One-Line Window
Alarm
Shows latest process alarm
Main Display Part
Main area for application displays
Display Items
Contents
Display Control Part
Common area for displays
1.
SILENCE button
Used to turn off sound
3-5
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA
No.
Display Items
Contents
1.
Page
This is used to move to next or previous group No.
2.
Group No.
This shows current group No.
3.
Group Title
This shows group description of group display being Indicated.
4.
Faceplate
This consists of maximum 8 loops of faceplates assigned to the group No.
Figure 3.2.3 Trend Display Enhanced trend graph indication invoked y graphical icons. The trend display replaces the bar-chart portion when the operator selects the trend function. The trend portion initially presents historical data for up to eight PVs in the group, then continually updates the trace from the fight margin. These trends are shown on a axis of up to eight trends each. Each trend is shown in a different color.
No.
Display Items
Contents
1.
Trend No.
Trend No. currently displayed.
2.
Trend title
Shows trend title. The title can be changed system. Configuration/ command menu display.
3.
Trend area
Space to show trend graph
4.
Pen No.
Pen No. associated with each trend graph
5.
Face plate button
The button is used to pop up the face plate display on the
left side of screen for selected pen. Pen can be selected by clicking point parameter area. 6.
Trend operation buttons
List of short-cut buttons used in the trend display
7.
Relative time
The time relative to the time at the right edge of the graph is displayed. When scrolled, the time relative to the time at the right edge of the graph before the scroll is displayed.
8.
Digital Value
Shown by bar when the Boolean value is 0 and shown by filling-in when the Boolean value is 1.
9.
Display range
Indicates the range for the analog-type pen that is now being displayed (the range for digital-type is not displayed).
10.
Trend display Time stamp
Shows newest and oldest time stamp for the displayed trend graph.
11.
Point parameter Area
Shows associated point parameters assigned to each trend pen.
12.
Connection Information part
Shows node No., Node type and connection status (connected/not connected) of the group for which you wish to collect data.
13.
Hair line cursor Operation buttons
The buttons are used to move hair line cursor forward and backward. The buttons are available when hair line cursor is active.
14.
Display time span
Shows selected display time span. This is not only standard time span, i.e., 1hour, 6hours, 1day and 6days, but also other time span resulting from zoom In/Out operation.
15.
Time span change Buttons
The buttons are used to change time span selection.
16.
Scroll buttons
The buttons are used to scroll trend graph forward and backward.
17.
Time-axis scroll Slide buttons
18.
19.
Suspended: collection is being suspended 20.
Collection period (only for Local trend)
Shows the collection start time and collection stop time for displayed trend graph. For current trend, the collection stop time is shown is blank.
Figure 3.2.4 Alarm Summary Display Indicates up to 200 of most recent alarms. Twenty-five of such alarms can be listed on each of five pages of this display. Alarm acknowledgement can be done on page by page of display.
Display items
Contents
1.
Filter
The buttons are used to slide (scroll more precisely) trend graph forward and backward slide of trend graph take place when the button is released.
Listed alarms can be filtered by the selection. indicates all process alarm. indicates all process alarms with emergency and high alarm priority only. indicates alarms with emergency priority only.
2.
Sort by
Chronological or priority-wise alarm message sorting can be chosen.
Display type (only for local trend)
Shows the graph display state Blank: when current trend is displayed Record: when record trend is displayed Save: when save trend is displayed
3.
Update display
This is used to tentatively freeze display update or to reset display freeze.
4.
Associate display
Displays that are related to selected points are invoked.
Operation status (only for Local trend)
Shows the data collection status Collecting: data is being collected by manual mode or automatic mode Waiting: waiting for collection time or collection trigger
5.
Unit alarm summary
This is used to invoke unit alarm summary display.
6.
Online manual
Opens the online manual specified in the point (supported in the future).(optional function)
7.
ACK
This is used to acknowledge alarm messages on the page.
3-6
No.
Part 3 Integrated Automation System (IAS)
LNGC GRACE ACACIA
8.
Page
This is used to show page No. of alarm summary display and to go to other pages.
9.
Select button
Move alarm message line up and downward to select dedicated alarm message.
10.
Priority
This indicates alarm priority of each alarm message (When items are sorted by priority)
11.
Time stamp
Shows time and date when the alarm occurs (When items are sorted by Time Stamp)
12.
Alarm indicator
This shows alarm type of each alarm message, e.g., PVHI for PV high alarm, BADPV for bad PV etc.
13.
Point description
Point descriptor of the each alarm point.
14.
EU
Engineering unit of point in alarm.
15.
Set value
Alarm trip point
16.
Alarm value
PV value when the alarm occurs or is returned to normal condition.
17.
ID
Unit to which the point in alarm is belonging.
18.
Tag name
Point name that is in alarm condition.
19.
Select unit
The selected units on the unit assignment display are indicated in cyan. The number of maximum usable units is 500, and only the alarm messages of selected units are listed. Pages are invoked by clicking the buttons.
20.
Column resize
The width of each column can be resized by dragging with the left mouse button pressed.
21.
Horizontal scrollbar
The horizontal scrollbar appears when the width of all columns exceeds the screen width.
Machinery Operating Manual
3-7
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA 3.3 DOHS (DEO Open History Station)
3.5 DOPC ІІ (DEO Process Controller ІІ)
DOHS is a historian and provides history data for DOSS.
1. General
1. Vessel data collection and history;
DOPC ІІ is a multi-function controller employing control loops, logic functions, sequence control and I/O processing.
- Collect process data on a periodic basis. - Collect various events; y Process Alarm y Sequence Event y Message y Operator Change y System Alarm y System Status - Query and retrieve events by various conditions. - Archive data into backup media.
3.4 DOGS (DEO Open Gateway Station)
- DOCM (DOPC Control Module) This is a main module of the DOPC ІІ consisting of the control modules and the communication interface modules. - Distributed I/O The I/O modules are mounted on DIN rail.
1. General
E-1
ETM E-3
MSC I-A
E-1
E-A
E-2
E-B
E-3
E-A
MSC I-B
I-A
I-2
I-3
E-B
MSC I-B
I-1
XBM
DOCM Configuration shows the DOCM system. The DOCM is composed of the following modules. - Control Module (MSC) - Ethernet Module (ETM) - X-BUS Module (XBM)
E-2
E-B
I-1
2. DOCM (DOPC Control Module) To access the DEO-NET information, DOGS is a gateway between the DEONET and the external network. The DOGS provides a network interface for the external Ether-net. The protocol for the data transition with external devices is objective linking and embedding for process control.
ETM
E-A
2. Reliability
DOHS
DEO-Net DEO-Net
- Built-in control / calculation algorithms - Sequence control implemented by CL (Control Language) - Distributed I/O for space saving - Remote I/O capability by fiber optic connection - Peer to peer communication with other DOPC ІІs over the DEO-NET using the tag name basis - Memory back-up by flash ROM
DOPC ІІ consists of ;
- Adoption disk mirroring (RAID1)
DOSS
I-A
I-2
I-3
XBM DOCM
X-BUS A X-BUS B
Three (3) sets of control modules (MSC) have redundant configuration, and execute the same processing synchronized with each other. The ethernet module (ETM) and the X-BUS module (XBM) compare outputs of three (3) MSCs, and get data by “logic of majority”, i.e., 2 out of 3. Even though one of MSC outputs incorrect data, the remaining two (2) data are correct and used for the control and monitoring.
3-8
I-B
I/O
I/O
Part 3 Integrated Automation System (IAS)
LNGC GRACE ACACIA
Machinery Operating Manual
3.6 Alarm Management
3.6.2 Alarm Acceptance Procedure
3.6.1 Classification of Alarm
The procedure of alarm acceptance is as follows
The monitoring & control system provides some kinds of alarms as follows.
Illustration 3.6a Alarm Acceptance Procedure
1. Process Alarm
Start
- Input from ship process analog and digital signals - Temperature High, Level Low. Pressure High, etc. The alarms are indicated on the Alarm Summary Display within 2seconds after receiving the signals on analog or digital input modules.
Process Alarm Occurrence
System Abnormal Occurrence
2. System Abnormal -
DOSS abnormal Alarm Printer abnormal DOHS abnormal DOGS abnormal(PCNS) DOPCⅡ abnormal DEO-NET communication abnormal
- Fan fail on IAS cabinets - Power Supply abnormal (DC and AC) - AC/DC power unit failure - UPS abnormal
Alarm Summary Display Call-up Icon Flickering
Buzzer Sounding
Buzzer Stop
Alarm Printout
System Status Display Call-up Icon Flickering
Remarks : Operator's action
Call-up Alarm Summary Display
System Abnormal Alarm Occurred?
: Phenomenon
Yes
No Call-up Related Graphic Display
Call-up System Status Display
Confirm Process Condition
Recovery Operation
Recovery Operation
Alarm Acknowledgement
Alarm Acknowledgement (Flicker Stop)
End
3-9
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA 3.7 Alarm Printout The alarm printers of IAS are located as follows. -
Cargo System : 1set in Cargo Control Room Machinery System : 1set in Engine Control Room
Clock) - TAG name - Description
The available quantity of lines on the fast alarm display is as follows. - 25 events/display (Turning over the page is available) - Max. 2000 events (80 pages)
The “ALM” is printed in red.
Illustration 3.8a Example of Alarm Printout
In addition to the above, the system status changes including system abnormal are printed out on the alarm printer.
Illustration 3.7a Alarm Printer Configuration
Illustration 3.7b Example of Alarm Printout
Cargo Control Room
Description
Time Stamp (Ship's Time)
CCC
Alarm Set-point Tag Name
Alarm Priority Alarm Type
DOSS 1
DOSS 2
DOSS 3
DOSS 4
Printer Cable Cargo Alarm Printer
Current Value/Status
Current Status
2001/05/18 13:42:55.652
BOTH BLR FO PP STOP
XABI11
STOP
MA
2001/05/18 13:42:56.296
2 BLR FO HDR PRS L-L
PALLBI106_2
L-L
MA
2001/05/18 13:42:57.064
1 BLR FO HDR PRS L-L
PALLBI106_1
L-L
MA
2001/05/18 13:42:57.426
2 BLR FRAME FAIL
XABI104_2
FAIL
MA
2001/05/18 13:42:58.014
1 BLR FRAME FAIL
XABI104_1
FAIL
MA
Unit ID (Alarm Group)
3.9 Data Logging
2001/06/18 11:24:18
E
OFFNORM
1 MFDWPT AUX LO PP ABNR
XAFD22_1
ABNOR
MA
ALM
2001/06/18 11:24:29
E
OFFNORM
1 MFDWPT AUX LO PP ABNR
XAFD22_1
ABNOR
MA
ACK
2001/06/18 11:24:58
E
OFFNORM
1 MFDWPT AUX LO PP ABNR
XAFD22_1
NOR
MA
RTN
2001/06/18 11:26:11
E
OFFNORM
S HFO SETT TK LVL L
LALOF83_1
LOW
MH
ALM
2001/06/18 11:29:03
E
OFFNORM
S HFO SETT TK LVL L
LALOF83_1
NOR
MH
RTN
2001/06/18 11:29:19
E
PVHI
MT MAIN STM TMP
TIAMS11
530.1
525.0
DEG C
MD
ALM
2001/06/18 11:29:19
E
PVHI
MT MAIN STM TMP
TIAMS11
510.0
525.0
DEG C
MD
RTN
2001/06/18 11:29:19
E
BADPV
1 TG GLAND STM PRS
PIAEX51_1
MG
ALM
2001/06/18 11:29:47
E
PVHI
MT MAIN STM TMP
TIAMS11
MD
ACK
505.0
525.0
DEG C
The logging printers of IAS are located as follows. - Cargo system – 1 set in CCR - Machinery system – 1 set in ECR
E : Em'cy OFFNORM : Off-normal Alarm (Digital Alarm) PVHH : PV High-high Alarm PVHI : PV High Alarm PVLO : PV Low Alarm PVLL : PV Low-low Alarm BADPV : Bad PV Alarm
ECC DOSS 6
DOSS 5
Printer Cable Machinery Alarm Printer
The historical alarm information is printed out on the alarm printer with a reference time. For the process alarm, the alarm printout provides the following events. - Alarm occurrence - Alarm acknowledgement - Alarm recovery The major printout item is as follows. -
Tag Name
Unit ID (Alarm Group)
ALM : Alarm Occurrence ACK : Alarm Acknowledgement RTN : Alarm Recovery
“ALM”, “ACK”, “RTN” DATE/Time : YYYY/MM/DD XX:XX:XX (HH:MM:SS)(Ship’s
The IAS provides data logging function in accordance with the following specification. 1. Fixed time Report
3.8 Fast Alarm Function DOSS 7
Description
E.U.
Engine Control Room
DOSS 8
Time Stamp (Standard Time)
The fast alarm function is a high speed scanning function for finding out a trip cause. The fast alarms are recorded on the hard disk of DOSS(DEO Open Supervisory Station) automatically. The operator can display and print the recorded Fast Alarms. If an equipment comes to trips, the procedure for finding out the trip cause is as follows. 1) The representative trip alarm of this equipment is reported on the Alarm Summary Display and the alarm printer.
This report is printed out automatically in accordance with the selected time interval (Based on Ship’s Time). - 1 hour interval : 0:10 ~ 00:00 - 2 hour interval : 0:00, 2:00, 4:00, 6:00, 8:00, 10:00, 12:00, 14:00, 16:00, 18:00, 20:00, 22:00 - 4 hour interval : 0:00, 4:00, 8:00, 12:00, 16:00, 20:00 - 8 hour interval : 0:00, 8:00, 16:00 - 12 hour interval : 0:00, 12:00 2. Demand Report
2) The Fast Alarms are indicated on the dedicated display and printed on the logging printer with operator’s request.
This report is printed out at the operator’s request. The format of “Demand Report” is same as “Fixed Time Report”.
3) The Fast Alarms are indicated and printed the order of its occurrence time..
The re-report function is available until the next log is activated. Setting of the logging interval, the demand request and the re-reporting request are done from “Report Setting Display”. The display is provided cargo and machinery respectively.
Operator can find out the trip cause for that equipment. To realize the Fast Alarm Function, The IAS applies specialized digital I/O modules, i.e. DISOE, Digital Input Sequence of Event. The DISOE provides high-resolution scanning within 20 ms. the Figure 3.8a shows the sample printing.
3 - 10
Part 3 Integrated Automation System (IAS)
LNGC GRACE ACACIA 3.10 Extension Alarm and Engineer’s Alarm All alarms detected by IAS are extended to extension alarm located in officer’s / engineer’s cabin and public space by the extension alarm system. The alarms are grouped to extension alarm groups and extension alarm panel annunciate the group alarm status. One audible buzzer does the alarm annunciation by extension alarm panels and annunciation lamps corresponded to extension alarm groups. The extension alarm panel consists of two portions. One is extension alarm. Another is engineer call portion. Both units combined a unit panel. The signals of each are separated respectively.
Machinery Operating Manual Illustration 3.10a Extension Alarm and Engineer Call System
Control Console Buzzer & ACK Signal
Duty Selection
Buzzer Signal
DOSS
Engineer/ Officer Call
Patrolman Alarm
Group Alarm Condition
All process alarm signal are monitored in accordance with alarm group configuration. Extension alarm sequence is to be treated in the DOPC II.
DOPC II
DOPC II
SIM
I/O Hard Wiring
Bi-directional Serial Communication
Extension Alarm LCD Engineer Call Lamp
BZ
Extension Alarm LCD
BZ
BZ
Engineer Call Lamp
BZ
Note : DOSS : DEO Open Supervisory Station DOPC II : DEO Process Controller II SIM : Serial Interface Module LCD : Liquid Crystal Display BZ : Buzzer
3 - 11
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA 3.10.1 Extension Alarm
2. Duty Engineer Selector (For Machinery)
Extension alarm indicator consists of the color LCD indicator. A set of LCD can be displayed both extension alarm indication and duty indication on an extension alarm panel.
This selector is furnished on a Engine Control Console for selecting duty engineer selection of Machinery system. When a duty engineer is selected, machinery UMS condition is established.
One set of duty selector is furnished in the Cargo Control Console and Main Control Console for Cargo and Machinery Systems.
It is possible to select plural engineers as the duty 3. Duty Officer Selector (For Cargo)
These duty selectors are used for duty officer and duty engineer selection. The duty officer selector is furnished on a Cargo Control Console. 1. Alarm Groups It is possible to select plural officers as the duty The extension alarm groups are shown on the following tables. 4. Display Layout Table 3.10.1 Extension Alarm Group of Cargo System Extension Alarm Group
Group Description
CA
ESD
CB
PRIORITY
CC
NN PRIORITY
CD
FIRE
CE
GAS
CF
SYSTEM TROUBLE
Table 3.10.2 Extension Alarm Group of Machinery System
A typical layout of alarm indication display on the LCD is shown on illustration 3.10.1 a. The layout is modified the appropriate portion only indicate depend on engineer or officers responsibility. Illustration 3.10.1a Layout of Group Alarm Indication
MACHINERY
CARGO
BLR TRIP & TROUBLE
ESD
M/T TRIP
PRIORITY
M/T TROUBLE
NON PRIORITY
M/T REMOTE CONTROL
FIRE
M/T SLOW DOWN
GAS
D/G & T/G TROUBLE
SYSTEM TROUBLE
Extension Alarm Group
Group Description
MA
BOILER TRIP & TROUBLE
MB
M/T TRIP
MC
M/T TROUBLE
FIRE
MD
M/T REMOTE ONTROL
GAS
ME
M/T SLOW DOWN
MF
D/G & T/G TROUBLE
MG
AUX. MACHINERY ABNORMAL
MH
E/R BILGE
MJ
FIRE
MK
GAS
ML
SYSEM TROUBLE
AUX. MACHINERY ABNORMAL E/R BILGE
SYSTEM TROUBLE
Note : Alarm Indicator : Duty Indicator
When the alarm occurs, the indicator that is involved the event is flashing in red and audible alarm will be initiated. The duty assigned engineer / officer can do silence the audible. The event is accepted in the control console, the group alarm indicator will be steady. It remains as steady in red until the condition disappears.
3 - 12
Part 3 Integrated Automation System (IAS)
LNGC GRACE ACACIA 5. Alarm Annunciation Sequence All IAS alarms are placed into alarm groups during periods of unmanned operation, either machinery or cargo, these alarms are passed to various rooms with alarm indicator flashing and an audible sound.
Machinery Operating Manual Illustration 3.10.1b Alarm Annunciation Sequence for Machinery System *1
W/H (INS)
ECR
Duty Engineer's Room Duty
Chief Engineer's Room
Off Duty
Abnormal Happen
Audible buzzer only initiated under unmanned condition. The sound is passed only duty assigned engineers / officers and public room.
Reset
Timer Cut SW
Alarm annunciation sequences are shown in following Illustration Illustration 3.10.1b Alarm Annunciation Sequence for Machinery System Illustration 3.10.1c Alarm Annunciation Sequence for Cargo System Illustration 3.10.1d Duty Selector Indication for Machinery Illustration 3.10.1e Duty Selector Indication for Cargo NOTE When an alarm occurs following the first alarm in the same alarm group, indicator flashing function and audible alarm function will be reactivated. (New alarm that categorized same group will annunciate in a same alarm group.)
Other Panels
Non *2
*2
5 Min. Time Delay
Cut
5 Min. Time Delay
Flicker
Flicker
Flicker
Flicker
Flicker
Flicker
Flicker
Flicker
Sound
Sound
Sound
Sound
Stop
Sound
Stop
Sound
Buzzer Stop
Buzzer Stop
Buzzer Stop
Buzzer Stop
Buzzer Stop
Buzzer Stop
Flicker
Flicker
Stop
Stop
Flicker
Flicker
Flicker
Flicker
Flicker
Stop
Stop
Stop
Stop
Stop
Flicker
Steady
Steady
Steady
Steady
Steady
Steady
Steady
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Off
Off
Off
Off
Off
Off
Off
Off
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Acknowl -edge
Steady Stop
Return to Normal
Note :
Lamp Buzzer
*1. The indication is on Alarm Summary Display, the actions are by keyboard. : Indication / Status
*2. If the alarm is not stopped by duty engineer within 5 min, the buzzer sound is activated.
: Action
*3. When ECC buzzer is not stop within 10 minutes, Machinery Engineer alarm will be activated automatically. *4. Buzzer of all panel is not activated during no duty engineer is selected, but, lamp indication is always enabled.
: Condition
3 - 13
Part 3 Integrated Automation System (IAS)
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 3.10.1c Alarm Annunciation Sequence for Cargo System *1
CCR
W/H
Duty Engineer's Room Duty
Illustration 3.10.1d Duty Selector Indication for Machinery Other Panels
Off Duty
Indication on IAS Graphic Selector Position
Abnormal Happen
Reset *2
5 Min. Time Delay
Flicker
Flicker
Flicker
Flicker
Flicker
Flicker
Sound
Sound
Sound
Sound
Stop
Sound
Buzzer Stop
Buzzer Stop
Buzzer Stop
Buzzer Stop
Buzzer Stop
Flicker
Flicker
Stop
Stop
Flicker
Flicker
Flicker
Flicker
Stop
Stop
Stop
Stop
Flicker
Steady
Steady
Steady
Steady
Steady
Stop
Stop
Stop
Stop
Stop
Stop
- Engine Control Room - Wheelhouse
Indication Lamp - Chief Engr's Room
ECR
ECR
1/E
1/E
1/E
On Duty
2/E
2/E
2/E
On Duty
3/E
3/E
3/E
On Duty
4/E
4/E
4/E
On Duty
Indication on IAS Graphic
Steady
- Cargo Control Room - Wheelhouse
Indication Lamp - Chief Engr's Room
Stop
Return to Normal
Off
Off
Off
Off
Stop
Stop
Stop
Stop
Stop
Stop
Note :
Lamp Buzzer
*1. The indication is on Alarm Summary Display, the actions are by keyboard. : Indication / Status
*2. If the alarm is not stopped by duty engineer within 5 min, the buzzer sound is activated.
: Action
*3. When CCC buzzer is not stop within 10 minutes, Cargo Engineer alarm will be activated automatically. *4. Buzzer of all panel is not activated during no duty engineer is selected, but, lamp indication is always enabled.
: Condition
1st Engineer 2nd Engineer 3rd Engineer 4th Engineer
ECR
Selector Position
Off
-
Illustration 3.10.1e Duty Selector Indication for Cargo
Acknowl -edge
Off
Duty State
3 - 14
Duty State - Chief Officer - Gas Engineer - 1st Officer
CCR
CCR
CCR
C/O
C/O
C/O
On Duty
G/E
G/E
G/E
On Duty
1/O
1/O
1/O
On Duty
Part 3 Integrated Automation System (IAS)
LNGC GRACE ACACIA
Machinery Operating Manual
3.10.2 Engineer’s Alarm and Patrolman System 1. Engineer’s Alarm The Engineer’s alarm is a statutory requirement under SOLAS. The system is arranged to provide audible and visual alarms on the indicator columns, located around the engine room, in the ECR, in the CCR and on the extension alarm panels (engineers’ cabin panels and public room panels). Activation of the Engineer’s alarm may be carried out at push buttons in the ECR or at any of the Patrolman panels locate in the Engine Room, which are also fitted with an Engineer’s alarm push button. In addition, the Engineer’s alarm is activated automatically in the event of any machinery alarm not being acknowledged within 10 min. Cancellation of the Engineer’s alarm can be carried out at the ECR only and not from the local push buttons. The manual activation of the Engineer’s alarm is not dependent upon the engine room operation mode, “Manned” or “Unmanned”. 2. Patrolman Alarm The patrolman system is provided in accordance with the requirements in the Code on Alarm and Indicators, 1995” The system is arranged to provided audible and visual alarms on each of the engineers’ cabin panels and public room panels attached to the extension alarm system, on the indicator columns located around the engine room and in the ECR. The system may be started or stopped by push buttons located in the ECR console, and the main entrances to the Engine Room. In each case, the status will be indicated by a lamp or cluster LED display located adjacent to each on/off push button. When the patrolman is first started, the run signal is indicated IAS graphic. An indication will remain on the UMS panel of the screen as ling as the patrolman is still active.
.
3 - 15
Part 3 Integrated Automation System (IAS)
LNGC GRACE ACACIA
Machinery Operating Manual
Part 4 : Main Boiler Control System 4.1 Main Boiler Control System ............................................................. 4 - 1 4.2 Burner Management System............................................................. 4 - 3 4.3 Automatic Combustion Control ........................................................ 4 - 5 4.4 BMS and ACC Logic Diagram ......................................................... 4 - 7 4.4.1 Burner Management System Logic Diagram.......................... 4 - 7 4.4.2 Automatic Boiler Control System Diagram .......................... 4 - 23
Part 4 Main Boiler Control System Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA Part 4 : Main Boiler Control System
(4)
FO pump pressure control
4.1 Main Boiler Control System
(5)
Steam pressure control, including:
The automatic boiler control (ABC) functions can be divided two functional segment that one is automatic combustion control (ACC) which controls several regulating valves for proper combustion, level control and steam temperature control etc and the other is burner management system (BMS) which operates FO & gas burner in regular sequence. This system makes automation of oil and gas burner. If an abnormality occurs during operation, the system issues an alarm. If the abnormal condition is such that operation cannot continue, the system immediately shuts off the fuel for the main boiler and stops the boiler. NOTE This manual describes an outline on the remote operation of the boiler. An operator must be fully acquainted with the operation of the main boiler, main boiler auxiliaries, oil and gas burner and the boiler automatic control system and its associated equipment. All the equipment must be maintained in good working condition. 1. Outline of Functions 1) The BMS system consists of the following functions: (1) Start / stop of oil burners (2) Start / stop of gas burners
confirm operation of indicating lamps with lamp reset switch, No.1 Boiler AC220V Source:
MCB21A
- Boiler master control with load ratio control
- No.1 Boiler Detector Source:
MCB24A
-
Air flow control including O2 control
-
COMMON AC220V Source:
MCB27
-
FO flow control
-
No.1 Boiler AC220V Source:
MCB21B
-
GAS flow control
- No.1 Boiler Detector Source:
MCB24B
(6)
-
Steam dump control
(2) Boiler Graphic Operation Panel
3) The other functions are as follows:
The boiler graphic operation panel is used to perform operation and monitoring of the ABC and BMS necessary for machine side operation of the oil and gas burner and selection of control position.
(1) Local panels with operation. (2)
Emergency operation
Also this panel is used to make machine side operation of ABC when ABC controller (CPU) cannot be used. Following operations can be done.
2. Outline of the Control Panel 1) Boiler Control Panel (BCP)
-
ABC OPERATION (AUTO/MANUAL)
The boiler control panel is installed in the engine control room and contains ABD & BMS controller, IAS remote I/O, relay units and system power supply units.
-
FO BURNER OPERATION
-
GAS BURNER OPERATION
(1) Switching on Power Supply Switch on the following power switches on Boiler Control Panel.
-
SELECTION OF CONTROL POSITION
(3) Nitrogen purge of gas lines
-
No.1 Boiler AC220V Source:
MCB1A
-
ABC EMERGENCY OPERATION
(4) Fuel mode changeover
-
No.1 Boiler AC220V Cont Source:
CP1A
-
FO TEMPERATURE BYPASS
(5) Burner automatic increase/decrease according to boiler load
-
No.1 Boiler AC220V Source:
MCB1B
-
STBY FAN OPERATION
(6) Automatic FO backup
-
No.1 Boiler AC220V Cont Source:
CP1B
(7) Automatic FO boost up in case of gas supply failure
-
UPS in this panel have power on/off push button switch.
(8) Boiler safety 2) The ACC system consists of the following functions: (1)
Drum water level control
(2)
Steam temperature control
(3)
Atomising steam pressure control
2) Boiler Gauge Board (BGB) The boiler gauge board is installed on the main boiler side (near the burner) and contains controller for local signal sending, monitoring instruments (direct pressure type), graphic operation panel and relay units necessary for machine side operation of the oil and gas burner. (1)
Switching on Power Supply
3) Emergency Operation Panel This panel is used to make start/shut-off of the FO burner when BMS controller (CPU) cannot be used. This controller (CPU) is dual, and if either CPU-1 or CPU-2 be normal, automatically operation will be able to maintain. 4) Operation from IAS IAS is sub-control station which is provided with operation and monitoring functions necessary for remote operation. IAS is used to perform the following operation.
Switch on the following power switches on Boiler Gauge Board and
4 -1
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
boiler (Total 4 Long Type Soot Blower and 16 Rotary type Soot Blower).
(1) No.1 and No.2 Boiler Operation After an initial start of the boiler is completed on the boiler gauge board, change control position from BGB to IAS and make operation and monitoring necessary for remote operation of the oil and gas burner. -
ABC OPERATION (AUTO/MANUAL)
-
FO BURNER OPERATION
-
GAS BURNER OPERATION
-
GAS SUPPLY OPERATION
6) Soot Blower Relay Panel (SRP) (1)
Switching on Power Supply Switch on the following power switches in soot blower relay panel. -
AC440V Source:
MCB11
(2) Gas Supply Operation Perform supply and shut-off operation of fuel gas from the master gas valve to the boiler gas burner. - MASTER GAS V/V OPEN OR CLOSE OPERATION (MANUAL) - MASTER N2 PURGE START OPERATION (MANUAL) -
BOILER GAS V/V OPEN OR CLOSE OPERATION (MANUAL)
-
BOILER GAS HEADER N2 PURGE START OPERATION (MANUAL)
5) Soot Blower Control Panel (SBCP) The soot blower control panel is installed in the engine control room and contains Soot Blower controller, operation panel, relay units and system power supply units. (1)
Switching on Power Supply Switch on the following power switches on SOOT BLOWER CONTROL PANEL. -
(2)
AC220V Source:
MCB1
Soot Blower Operation Panel The soot blower operation panel is fitted on Soot Blower Control Panel, which is provided with operation and monitoring function necessary for remote automatic operation of the 2 LONG TYPE SOOT BLOWER and 8 ROTARY TYPE SOOT BLOWER per
4 -2
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 4.2 Burner Management System
Dual
The burner management system (BMS) ensures that the sequential operation of the three (3) LNG/FO combination burners is carried out in conjunction with automatic combustion control (ACC) signal. The three (3) LNG/FO combination burners installed on the boiler roof are controlled locally on the BGB panel and remotely on the IAS operator station.
(5) F.D. Fan Stop (6) BMS CPU Fail (BOTH BMS CPU)
FO
Gas
Fuel mode switch order
The BMS enables sequential operation of the LNG/FO combination burner and burner piston valves, interlocking with the boiler protective system. The ABC and a centralized monitoring systems have been adopted to display sequence flow and interlocking operations. 1. Control Position 1) BGB Position This mode operates from the boiler local position. In this mode, operations of the LNG/FO combination burner (priority given to BGB position operation) and selection of the control position can be made except for operation of master gas supply and boiler gas supply valves.
FO “Boost Up”
(2) Fuel mode can be also be changed with FO burner ON / OFF PB switch or GAS burner ON / OFF PB switch when burner control mode is selected to manual mode. In this operation, the interlock conditions in item (3) are bypass, so and operator must set and confirm the conditions. (3) Sequence interlock - Fuel mode change form “FO” to “DUAL”. Master gas valve must be open, GAS IGN. RATE OK from ACC must be established, and GAS CONT V/V IGN. LAMP must be on.
This mode is operated from the Engine Control Room console. In this mode, all remote operations of the LNG/FO combination burner can be made.
- Fuel mode change from “DUAL” to “GAS”. FO EXTINGUISH OK from ACC must be established, and FO CONT V/V IGN. LAMP must be on.
2. Selection of the Operation Mode
- Fuel mode change from “GAS” to “DUAL”. FO IGN. RATE OK from ACC must be established, and FO CONT V/V IGN LAMP must be on.
1) Selection of control position
2) Selection of FO/Dual/Gas-Fuel Mode (1) FO/DUAL/GAS fuel mode can be selected with fuel mode switch on IAS when BMS auto mode is selected. However, fuel mode cannot be selected directly from FO to GAS or GAS to FO. In operation with FUEL MODE PB, it is necessary to establish the Interlock conditions in item (3). When ACC is in FULL AUTO position, these conditions are automatically set by commands from BMS.
SH Steam Temp H/H
(8)
Control Air Press L/L
2) Boiler FO Trip
FO “Back Up”
2) IAS Position
Select either the BGB or IAS control position by operating the control position selection switch on the boiler gauge board graphic panel. Only the BGB position can be selected at the initial burner start when the burner is out of operation or in interlock-bypass mode. If either FO burner or GAS burner is operating and the operating mode is not in interlock-bypass mode, the IAS position can be selected by pushing IAS button.
(7)
3. Boiler Trip 1) Boiler trip If an abnormal condition arises where the boiler operation cannot be continued, the FO burner valve and Gas burner valve are closed immediately and fuel for the boiler is automatically shut off, thereby tripping the boiler.
Boiler FO Trip Condition -
Boiler Trip Condition (3-(1))
-
ATOM STM Press L/L
-
FO Press L/L
-
FO Temp L/L
-
FO pump Stop
3) Boiler Gas Trip If an abnormal condition arises where gas burner operation cannot be continued, Master gas valve and boiler gas valve are closed immediately and gas for the burner is automatically shut off, thereby tripping the gas burner. After that, N2 purge of burner gas line is automatically performed. Master gas valve shut-off conditions and boiler gas valve shut-off condition are as follows. Master Gas Valve Shut-off Condition -
Boiler Trip Condition
ESDS Activated
- Both Boiler Trip
(1) Drum W Level E/H (2) Drum W Level E/L (3) All Burner Flame Fall (4)
If an abnormal condition arises where FO burner operation cannot be continues, FO burner valve is closed immediately and fuel for the boiler is automatically shut-off, thereby tripping the FO burner.
-
Duct Fan both Stop
-
Gas Leak Detect
- Gas Temp L/L
Manual Trip
4 -3
Part 4 Main Boiler Control System
LNGC GRACE ACACIA -
Machinery Operating Manual
Vapor Header Pressure L/L
- E/R Ventilation Fan Stop -
No.1 and No.2 Boiler (Both) Gas Shut-Off Condition
-
Bog Heater Abnormal
Boiler Gas Valve Shut-off Condition -
Gas Press L/L
-
Gas Press H/H
- Boiler Shut-off Condition (3-(1)) -
Manual Trip from IAS
- Master Gas Valve Close 4) Reset of Trip Perform reset of trip by the following procedure. (1) Investigate the cause of shut-off and restore normal condition. (2) After restoring normal condition, push flickering CLOSE PB for master gas valve, boiler gas valve of FO shut off valve to cancel shut-off and reset the alarm circuit with LAMP RESET PB.
4 -4
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 4.3 Automatic Combustion Control 1. MST/Master Control Loop The master control loop compares and computes (set point control) a pre-set master set pressure (Master SP) with the actual boiler superheater steam pressure (PV). Its outputs are the results of computing the sub-control loop as boiler load signal (“master signal”) to equalise both pressures quickly.
1) Steam Dump Control When the boiler load is becomes below the turn-down the range of burners or when boiler load changes quickly, the steam dump control valve is controlled to dump momentarily generated steam and stabilize boiler operation quickly. A pre-set steam dump set pressure (DUMP SP) and superheater outlet steam pressure (PV) are compared and computed (set point control). The steam dump control valve is controlled to equalise both pressures quickly.
(3) Automatic change-over of the fuel mode The FO flow is automatically controlled in accordance with the fuel mode change-over order from BMS. Dual
FO
GAS
1) Two-Master System 2) Excess BOG Dump Control (Excess BOG Dump Mode) The two master system with a master controller for each boiler is adopted. The active master signal is automatically selected depending on the operating condition of the boilers (Master signal is output from the active master controller). The priority in the active master controller 1. Boiler Auto Run 2. Auto Steaming Up 3. No.1 Boiler
This is a controller that operates when the dump mode is selected in the cargo control system and the BOG consumption in the boiler becomes lower than “RECOMMENDED BOILER LOAD” which is an output from cargo control system, steam equivalent to excess BOG is automatically dumped.
3) FO Back-up Control Fuel mode is changed from “GAS” mode to “DUAL” mode to supply fuel oil equivalent to shortage by BOG firing. 4) FO Boost-up Control When master gas valve trip function is activated, fuel mode is changed from “GAS” mode or “DUAL” to “FO” mode, and FO flow equivalent to BOG flow is supplied to meet the boiler load by fuel oil firing.
3) Dump A/M Station Selected by “BMS” AUTO / MAN STATION is provided to both “IAS” and “BGB” operation panel
5) A/M Station
2) Master Manual Station 3. FO/Fuel Oil Control Loop Manual Station is provided to “BGB” operation panel and “IAS”. (1) Boiler Bias Operation Both boilers are operating in “ACC AUTO” mode with “BIAS” to produce a master signal distribution.
The master signal (SP) from the master control loop and the actual FO flow (FO flow is calculated by multiplying FO burning pressure by the number of burners : PV) are compared and computed (cascade control). The FO flow (FO flow control valve) is controlled to equalise both quickly. 1) Priority Control of Gas Flow
(2) Master Set Point The master set pressure (MASTER SP) of the superheater outlet steam pressure is set manually. This master set point is given an initial value of 6.03 MPa when electric power is on. The set point of steam dump control (DUMP SP) is set to MASTER SP + 0.1 MPa.
When the gas flow control is in “AUTO” mode, priority is always given to gas flow over FO flow to meet boiler load (master signal). Conditions for releasing the minimum fuel oil flow: (1) Gas control valve is fully open or manually operated.
“IAS” and “BGB” operation panel are provided with AUTO / MAN STATION of follow-up type 4. ATM/Atomising Pressure Control Loop The required atomising pressure (SP) which is determined by FO burning pressure and actual atomising pressure (PV) is compared and computed (cascade control) and is atomising flow (atomising pressure control valve) is controlled to equalise both pressures quickly. 1) A/M Station “IAS” and “BGB” operation panel are provided with AUTO / MAN STATION of follow-up type 5. Gas/Gas Flow Control Loop
* MASTER SP Auto Set Down : In the following modes, the master set point is lowered automatically by 0.05 MPa to 5.98 MPa. -
Manoeuvring mode Excess BOG Dump Mode
(2)
BMS issues FO boost-up order.
2) Coordinate Control with BMS The following controls are performed automatically in coordination with BMS.
2. SDC/Steam Dump Control Loop
(1) Initial light-up of the FO burner
This is a system that dumps excess steam from the boiler to the main condenser.
(2) Automatic burner increasing and decreasing control in “FO” mode and “DUAL” mode.
4 -5
The master signal (SP) from the master control loop and actual BOG flow (PV) are compared and computed (cascade control) and BOG flow (gas flow control valve) is controlled to equalise both quickly. 1) Control of BOG Flow Control of BOG flow is made by controlling the LD compressor (cargo part IAS), with the gas flow control valve kept at a constant opening.
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 2) Free Flow Control BOG firing is made at the pressure of vapour header, with LD compressor stopped. BOG flow is controlled by gas flow control valve only. 3) Coordinate Control with BMS
2) Fuel/Air Ratio Adjuster
The following controls are performed automatically in coordination with the BMS. (1) Automatic burner decreasing control in “GAS” mode. (2) Automatic burner increasing and decreasing control in “DUAL” mode. (3) Automatic change-over of fuel mode. Gas flow is automatically controlled in accordance with the fuel mode change-over order from BMS.
4)
“BGB” operation panels and “IAS” are provided with ratio adjuster. Fuel/Air ratio (excess air ratio) can be adjusted manually regardless of “BGB” and “IAS” control position.
STATION of follow-up type 9. FO Pump Discharge Pressure Control Loop A pre-set FO pump discharge pressure (SP) and actual pressure (PV) are compared and computed (set point control) and FO pump recirculation flow (FO Recirc. Flow control valve) is controlled to equalise both pressures quickly. Automatic change-over of proportional band (PB) by fuel oil flow is adopted to improve controllability. 10. BNR PRG / Burner Purge Steam Pressure Control Loop
3) Auto/Man Station “IAS” and “BGB” operation panel are provided with AUTO / MAN STATION of follow-up type
A pre-set burner purge steam pressure (Constant : SP) and actual pressure(PV) are compared (set point control) and burner purge steam pressure (Burner purge steam press control valve) is controlled to equalise both pressure quickly
7. FWC : Feed Water Flow Control A pre-set drum water level (SP) and actual steam drum level (PV) are compared and computed (set point control) and Feed water flow (Feed water flow control valve) is controlled to equalise both levels quickly.
Dual
FO
adopted. The design of the O2 concentration (SP) which is determined by the boiler load and actual O2 concentration (PV) are compared and computed (cascade control) and the “EXCESS AIR RATIO” is automatically corrected.
GAS
FO Boost-up Control When master gas valve shut-off function is activated, BOG supply is maintained until fuel mode is changed from “GAS” mode to “FO” mode or from “DUAL” mode to “FO”
5) A/M Station “IAS” and “BGB” operation panel are provided with AUTO / MAN STATION of follow-up type
The feed-forward control by the boiler steam flow and feed water flow is adopted to improve controllability in response to boiler load changes (threeelement type control system). 1) “VARIABLE” or “FIX” Mode The operator can select the setting point “VARIABLE” or “FIX” mode. 2) A/M Station “IAS” and “BGB” operation panel are provided with AUTO / MAN STATION of follow-up type
6. Air/Air Flow Control Loop
8. STC / Steam Temperature Control
The required burner draft loss (SP), switch is determined by the sum of FO flow and actual burner draft loss (wind box – furnace draft : PV) are compared and computed (cascade control) and combustion air (F.D. FAN inlet vane) is controlled to equalise both quickly.
A pre-set STC set temperature (SP) and actual superheater outlet steam temperature (PV) are compared and computed (set point control) and Steam flow (steam temperature control valve) circulating through the internal control desuperheater in the water drum is controlled to equalise both temperatures quickly.
The feed-forward control by the master signal is adopted to improve controllability in response to boiler load change. Moreover, excess air adjuster is provided to enable manual correction of combustion air in response to changes in firing conditions. 1) O2 Trim Control Feed-back control by O2 concentration in the boiler outlet exhaust gas is
Feed-forward control by the superheater 5-pass inlet steam temperature is adopted to improved controllability in response to boiler load changes (twoelement type control system). 1) A/M Station “IAS” and “BGB” operation panel are provided with AUTO / MAN
4 -6
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 4.4 BMS and ACC Logic Diagram
BMS MAN-AUTO CHANGE
4.4.1 Burner Management System Logic Diagram CASE NO.
BMS LOGIC SYMBOLS NO.
DESCRIPTION
SYMBOLS
REMARKS
1 1
2
3
OR-GATE
2
AND-GATE IN
INVERTER
OUT # SET TIME (sec.)
4
5
3
IN
ON DELAY TIMER (SOFT)
T
4
T
IN
# SET TIME (sec.)
OFF DELAY TIMER (SOFT)
OUT
OUT
6
7
8
S R
FLIP-FLOP
5
S R
S:SET R:RESET
OUT
CROSS CONNECTION
6
MANUAL OPERATION
7 9
AUTO OPERATION
8 10
11
12
13
SEQUENCE SIGNAL
9
CONDITIONAL STEP
LAMP ON
ON
LAMP FLICKER
RL
14
MONITOR SWITCH
M.
S.
15
LIMIT SWITCH
L.
S.
ON
W : White G : Green RL : Red Lamp YL : Yellow Lamp
-
W : White G : Green RL : Red Lamp YL : Yellow Lamp
FUEL MODE
F.O.
GAS
BASE
O
X
NO.2
X
X
NO.3
X
X
BASE
O
X
NO.2
O
X
NO.3
X
X
BASE
O
X
NO.2
O
X
NO.3
O
X
BASE
X
O
NO.2
X
X
NO.3
X
X
BASE
X
O
NO.2
X
O
NO.3
X
X
BASE
X
O
NO.2
X
O
NO.3
X
O
BASE
O
O
NO.2
X
X
NO.3
X
X
BASE
O
O
NO.2
O
O
NO.3
X
X
BASE
O
O
NO.2
O
O
NO.3
O
O
BASE
-
-
NO.2
-
-
NO.3
-
-
BMS MODE MAN-AUTO OK or NOT
BURNER CONTROL MODE AT FUEL TRIP * 4
DESCRIPTION OF BMS AUTO. CONTROL
F.O. TRIP
F.O. ONLY
OK
OPERATE OF "FUEL MODE" SW AT BMS AUTO.
GAS TRIP
F.O./DUAL/GAS
*1
NO.2 F.O. -> ON (CASE 2)
BLR TRIP AUTO -> MAN
CONTINUE (AUTO)
F.O. -> DUAL (TO CASE 7) *6
*1
NO.2 F.O. -> OFF (CASE 1) NO.3 F.O. -> ON (CASE 3)
BLR TRIP AUTO -> MAN
CONTINUE (AUTO)
F.O. -> DUAL (TO CASE 8) *6
*1
NO.3 F.O. -> OFF (CASE 2)
BLR TRIP AUTO -> MAN
CONTINUE (AUTO)
F.O. -> DUAL (TO CASE 9) *6
CONTINUE (MAN)
CONTINUE (MAN)
NOT OPERATE BMS MAN
CONTINUE (MAN)
CONTINUE (MAN)
NOT OPERATE BMS MAN
GAS -> DUAL (CASE 9) *5
NOT (MAN) GAS ONLY
OK
DUAL
OK
F.O. DUAL GAS
NOT (MAN)
* MAN
:
*2 *3 *1
GAS -> DUAL (CASE 9) GAS -> F.O. (CASE 3) NO.3 GAS -> OFF (CASE 8) (BACK-UP ORDER FROM ACC)
CONTINUE (MAN)
*3 CONTINUE (MAN)
*1 *3
NO.2 DUAL -> ON DUAL -> F.O. (CASE 1)
AUTO/MAN (TO CASE 4)
CONTINUE (TO CASE 1)
DUAL -> F.O. (CASE 1)
*1 *1 *3
NO.2 DUAL -> OFF (CASE 7) NO.3 DUAL -> ON (CASE 8) DUAL -> F.O. (CASE 2)
AUTO/MAN (TO CASE 5)
CONTINUE (TO CASE 2)
DUAL
*1 *3
NO.3 DUAL -> OFF (CASE 8) DUAL -> F.O. (CASE 3)
CONTINUE (AUTO) (TO CASE 6)
CONTINUE (TO CASE 3)
ALL COMBINATIONS EXCEPT CASE 1 ~ CASE 9
CONTINUE (MAN)
CONTINUE (MAN)
DUAL
*8 F.O. (CASE 2) GAS (CASE 5) *7
*8 F.O. (CASE 3) GAS (CASE 6) *7
NOT OPERATE BMS MAN
BMS CONTROL MODE "MAN"
* AUTO :
BMS CONTROL MODE "AUTO"
*1
:
BURNER AUTO NUMBERS CONTROL
*2
:
F.O. BACK-UP CONTROL (FROM ACC SIGNAL)
*3
:
F.O. BOOST-UP CONTROL (BY GAS TRIP)
*4
:
IN CASE OF BOTH FUEL TRIP CONDITION, BLR IS MADE "TRIP" & BMS IS SET TO "MAN"
16
17
FUEL
BURNER
AUTOMATIC COMBUSTION CONTROL
ACC
18
BURNER MANAGEMENT SYSTEM
BMS
19
BOILER GAUGE BOARD
BGB
*5
:
IGN. F.O. RATE HAS BEEN ESTABLISHED
*6
:
IGN. GAS RATE HAS BEEN ESTABLISHED
*7
:
F.O. EXTINGUISH HAS BEEN ESTABLISHED AND NOT * 3
*8
:
GAS EXTINGUISH HAS BEEN ESTABLISHED
BMS-17 LOCAL
TABLE 1
4-7
MAN-AUTO. CHANGE & AUTO. CONTROLS OF BMS
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
ECC BMS
REMOTE IAS
BURNER CONT. POSITION SELECT
BGB
Sh 3
BURNER BURNING S
IAS
IAS MODE. ESTA.
R
CONT. MODE
MANU. AUTO
MANU. MODE
Sh 6,7,8, 3,9,12,13 F.O. BNR SEQ Sh 3,6,7,8,9 GAS BNR SEQ Sh 3,12,13
AUTO MODE Sh 2
BURNER AUTO. MODE ESTABLISH
ACC
CONT. SIGNAL
Sh 6,7,8, 9,12,13 F.O. BNR SEQ Sh 6,7,8,9 GAS BNR SEQ Sh 12,13
(1-1) SELECTION OF CONTROL POSITION SELECT "BGB" OR "IAS" MODE BY OPERATING THE CONTROL POSITION SELECTOR SWITCH ON THE LOCAL PANEL. BLR EMERG. MODE
ON
S
OFF
R
AT "BGB", THE "MAN" MODE ONLY CAN BE SELECTED AND AT "IAS", THE "MAN" OR "AUTO" MODE CAN BE SELECTED. WHEN THE INITIAL START OF THE BURNER OR WHEN IT HAS BEEN STOPPED FROM "BGB" POSITION, IT IS MANDATORY TO RE-START THE BURNER FROM "BGB" POSITION.
EMERG. MODE
Sh 5,15
GAS SUPPLY OPERATION
MANU. MODE
GAS SUPPLY SEQ
Sh 11
MASTER GAS V/V OPEN/CLOSE EACH BOILER GAS V/V OPEN/CLOSE
(ONLY REMOTE OPERATION)
BMS-1 Sh. No. 1
4-8
BLOCK DIAGRAM OF BMS CONTROL POSITION SELECT
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
ECC BMS (2-1) AFTER THE FIRING OF BASE F.O. BURNER HAS BEEN ESTABLISHED, THE BURNER "AUTO" MODE CAN BE SELECTED AT "BOP" POSITION. (2-2) SEE TABLE 1 (BMS-16) FOR CONDITIONS PERMITTING THE SWITCH FROM THE "MANUAL" MODE TO "AUTO" MODE AND FOR WHAT KINDS OF CONTROL ARE PERFORMED IN THE "AUTO" MODE.
Sh14
CONT. POSITION SELECT
BNR FLAME FAIL
BGB
F.O. BNR MANU. MODE
IAS
GAS BNR MANU. MODE
NO
BNR CONT. MODE
AUTO MANU. (2-1)
AUTO MODE EST. Sh BMS-16 (2-2)
YES
S R Sh 6,7,8
BLR F.O. STAND-BY
Sh 6,7,8
F.O. BNR BURNING
Sh 12
GAS BNR BURNING
Sh 12
BNR GAS STAND-BY
F.O. BNR AUTO STAND-BY MODE
F.O. BNR AUTO RUN MODE
Sh 4
BURNER AUTO. MODE ESTABLISH
GAS BNR AUTO STAND-BY MODE
GAS BNR AUTO RUN MODE
Sh 4
BMS-2 Sh. No. 2
4-9
Sh1,3
BLOCK DIAGRAM OF F.O. & GAS BURNER AUTO / MANU. MODE SELECT
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
REMOTE IAS
ECC BMS
Sh 2
Sh 10
BURNER AUTO. MODE ESTA
F.O. BOOST-UP ORD. (GAS TRIP)
F.O. BOOST-UP ORD.
A C C
F.O. BNR INC. ORDER
Sh 6,7,8
ALL GAS BNR STOP
(3) -2
(3)-1 AFTER THE BURNER "AUTO" MODE IS SELECTED, THE BURNING MODE OF FO/DUAL/GAS CAN BE CHANGED OVER, USING THE BURNER "FUEL MODE" SWITCH. THE FIRING MODE CAN BE CHANGED OVER AS FOLLOWS. FO GAS DUAL
DUAL DUAL FO OR GAS
IT SHOUD BE NOTED THAT THE FIRING MODE REMAINS UNCHANGED EVEN IF THE "FUEL MODE" IS HANDLED IN THE BURNER "MANU." MODE. WITH THE BURNER IN THE "MANU." MODE, THE MODE OF COMBUSTION IS SET IN ACCORDANCE WITH THE MANUAL CONTROL OUTPUT.
A C C
(3)-2 F.O. BACK-UP AND F.O. BOOST-UP CONTROL "F.O. BACK-UP" AND "F.O. BOOST-UP" CONTROLS ARE PREFORMED DURING "GAS FIRING" AND "DUAL FIRING" MODE. WHEN SIGNALED BY THE ACC OR OTHER COMMAND,"F.O. BACK-UP" CONTROL AUTOMATICALLY STARTS THE F.O. BURNER FOR THE SHIFT TO THE DUAL BURNING MODE. WHEN SIGNALED BY THE MASTER GAS V/V TRIP COMMAND Sh.NO.10 (BMS-10), "F.O. BOOST-UP" CONTROL TRIPS THE GAS BURNER AND AT THE SAME TIME, STARTS THE F.O. BURNER FOR THE SHIFT TO THE F.O. BURNING MODE.
F.O.
(3)-2 F.O. BOOST-UP
(3)-1 Sh 6
(3)-1 (3)-1 (3)-2 F.O. BACK-UP
(3)-1
BASE F.O. BNR BURNING
GAS
DUAL
ACC
GAS BNR EXTING. OK (3) -1
F.O. BURNER FUEL MODE
Sh 12
GAS BNR DEC. ORDER
(3) -1
DUAL
(3) -1
GAS
BNR GAS STAND-BY
S
Sh 13
GAS BNR INC. ORDER
Sh 12
F.O. BNR INC. ORDER
Sh 6,7,8
F.O. BURNING MODE
R Sh 1
MANU. MODE
Sh 6
BASE F.O. BNR BURNING
Sh 7
NO.2 F.O. BNR BURNING
Sh 8
NO.3 F.O. BNR BURNING
(3) -1
F.O. BURNING MODE
Sh 4 S
DUAL BURNING MODE
R DUAL BURNING MODE
S
Sh 4
GAS BURNING MODE
R Sh 12
BASE GAS BNR BURNING
Sh 12
NO.2 GAS BNR BURNING
Sh 12
GAS BURNING MODE
BURNER BURNING
NO.3 GAS BNR BURNING
IAS
Sh 1
F.O. BACK-UP ORDER
Sh 4
(3)-2
CARGO TK PRESS. L (3)-2 LD F.O. BACK-UP COMP PANEL ORDER LD COMPRESSOR NOT RUN ALL F.O. BNR DEC. ORD ACC
(3)-2 F.O. BACK-UP ORDER MANEUVERING (3)-2 F.O. BACK-UP MTRP ORDER NO.3 BURNER DECREASE ACC
Sh 6, 7,8,9
F.O. BNR EXTING. OK
ACC
F.O. IGN. OK
Sh 10
F.O. BOOST-UP ORD. (GAS TRIP)
(3)-2
BMS-3 Sh. No. 3
4 - 10
BLOCK DIAGRAM OF F.O./DUAL/GAS BURNING MODE SELECT
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
REMOTE
NO
ECC BMS
IAS
A C C
Sh 2
F.O. BNR AUTO RUN MODE
(4-1)
F.O. IGN. OK
NO.2 F.O. BNR INC. ORDER
F.O. BURNING MODE
NO.2 F.O. BNR INC. ORD
Sh 7
BY ACC
A C C
NO.2 F.O. BNR DEC. ORDER
A C C
NO.3 F.O. BNR INC. ORDER
A C C
NO.3 F.O. BNR DEC. ORDER
NO.2 F.O. BNR DEC. ORDER
Sh 9
F.O. BURNING AUTO Sh 3
YES
A C C
NO.2 IGN. SET ORDER
NO F.O. IGN. OK
YES
NO.3 F.O. BNR INC. ORD
Sh 8
BY ACC NO.3 F.O. BNR DEC. ORDER
Sh 9
A C C
NO.3 IGN. SET ORDER
NO A C C
F.O. IGN. OK
NO.2 BNR INC. ORDER
YES
NO.2 F.O. BNR INC. ORD
Sh 7
NO.2 F.O. BNR DEC. ORD
Sh 9
NO.2 GAS BNR DEC. ORD
Sh 13
NO.3 F.O. BNR INC. ORD
Sh 8
NO. 3 F.O. BNR DEC. ORD
Sh 9
NO. 3 GAS BNR DEC. ORD
Sh 13
NO.3 GAS BNR INC. ORD
Sh 12
NO.3 GAS BNR INC. ORD
Sh 12
BY ACC A C C
F.O. BURNER FUEL MODE
DUAL
Sh 3
A C C
DUAL BURNING MODE
NO.2 IGN. SET ORDER
NO.2 BNR DEC. ORDER
GAS (4-2) Sh 2
GAS BNR AUTO RUN MODE
DUAL BURNING AUTO NO A C C
F.O. IGN. OK
NO.3 BNR INC. ORDER
YES
BY ACC A C C A C C
A C C
(4-3) GAS BURNING AUTO Sh 3
GAS BURNING MODE
NO.3 BNR DEC. ORDER
NO.3 GAS BNR DEC. ORDER
NO.3 GAS BNR DEC. ORD
NO F.O. BACK-UP
YES
REFER TO Sh 3
NO YES
MASTER GAS SHUT-OFF COND. (Sh 10)
4 - 11
Sh 13
(4-1) F.O. BURNER AUTO NUMBERS CONTROL IN THE BURNER "AUTO" MODE AT THE "IAS" POSITION. USING THE BURNER "AUTO" MODE, AUTOMATICALLY START OR STOP NO.2 AND NO.3 BURNER IN ACCORDANCE WITH THE COMMAND FROM THE ACC. (4-2) DUAL BURNER AUTO NUMBERS CONTROL IN THE BURNER "AUTO" MODE, F.O. BURNER AND GAS BURNER OF NO.2 AND NO.3 BURNER CAN BE AUTOMATICALLY STARTED OR STOPPED IN ACCORDANCE WITH THE COMMAND FROM THE ACC. (4-3) GAS FIRING ONLY AUTO CONTROL IN THE "AUTO" MODE, GAS BURNER OF NO.3 BURNER CAN BE AUTOMATICALLY EXTINGUISHED. IN THIS CASE, THE FUEL MODE TO BE CHANGED TO DUAL BURNING MODE BY ACC F.O. BACK-UP SIGNAL.
FROM ACC OR OTHER
F.O. BOOST -UP
NO.3 IGN. SET ORDER
REFER TO Sh 3
BMS-4 Sh. No. 4
BLOCK DIAGRAM OF BURNER NUMBER AUTO. CONTROL
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
(5 - 1) BOILER TRIP OR BOILER F.O. SHUT-OFF V/V CLOSE WHEN CONDITIONS PROHIBITING THE F.O. BURNER OPERATION ARE ESTABLISHED, THE BOILER F.O. SHUT-OFF VALVE AND EACH F.O. BURNER VALVE ARE AUTOMATICALLY CLOSED. (IN THE BURNER FUEL MODE "DUAL OR GAS", THE BOILER IS NOT TRIPPED EVEN IF BOILER F.O. SHUT-OFF CONDITION IS ACTIVATED.)
NO. 1 BOILER
(5 - 2) RE-START OPERATION AFTER BOILER SHUT-DOWN RE-START THE BURNER IN ACCORDANCE WITH THE FOLLOWING PROCEDURE. (1) CHECK AND ELIMINATE THE CAUSE OF THE SHUT-DOWN (2) AFTER THE CAUSE HAS BEEN ELIMINATED, PUSH THE "OFF" SWITCH OF BOILER F.O. SHUT-OFF VALVE TO CANCEL THE SELF-HOLDING CIRCUIT FOR THE BOILER TRIP. (3) RE-START THE BOILER IN ACCORDANCE WITH THE OPERATING PROCEDURE IN (Sh. 6, 7,8)
ATM STEAM PRESS. LOW/LOW
F.O. TE MP. L.OW/LOW
BLR F.O. SHUT-OFF CONDITION
LOCAL (BGB)
ON
F.O. TEMP. BY-PASS
OFF
F.O. PRESS. LOW/LOW
F.O. PUMP STOP
Sh 6,7,8
BASE NO.2, OR NO.3 F.O. BNR BURNING
LOCAL (BGB)
Sh 1
EMERG. MODE (5 - 1)
BLR F.O. SHUT-OFF V/V CLOSE
S R
DRUM WATER LEVEL EXTRA HIGH
BASE F.O. BNR V/V CLOSE
DRUM WATER LEVEL EXTRA LOW ELECTRIC POWER FAILURE
NO. 2 F.O. BNR V/V CLOSE
(5 - 1) BLR F.O. SHUT-OFF VALVE CLOSE PB
NO.1 F.D. FAN RUN
NO. 3 F.O. BNR V/V CLOSE
STAND-BY F.D. FAN RUN
BLR TRIP CONDITION
BLR F.O. SHUT-OFF V/V CLOSE
ALM. SEQ
STAND-BY F.D. FAN AIR DMPR OPEN (NO.1 BLR SIDE) STAND-BY F.D. FAN AIR DMPR OPEN (NO.1 BLR SIDE) LOCAL STAND-BY F.D. FAN (BGB) USED SELECT ALL BURNER FLAME FAIL
STAND-BY F.D. FAN USED SET
BOILER TRIP CONDITION
Sh 10
NO.1 NO.2 (BY FLAME MONITORING SYSTEM)
EMERGENCY MANU. TRIP
SHTR TEMP H/H
NOTE : NO.1 BOILR SHOWN. NO.2 BOILER TO BE SAME.
BMS CONTROLLER ABNORMAL
BMS-5 Sh. No. 5
4 - 12
BLOCK DIAGRAM OF BOILER F.O. SHUT-OFF CONDITION
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
ALL F.O. BNR NOT RUNNING
ECC BMS
G S P
F.O. PUMP RUN TS F.O. TEMP. BY-PASS
F.O. RECIRC. V/V CLOSE
*5
L S
FO TEMP NOR *4
ON OFF
BLR F.O. STAND-BY Sh 1
Sh 2
MANU. MODE NO IGN. SET
*5 NO BLR F.O. SHUT V/V
ALL F.O. V/V CLOSE (LS)
OP CL BLR F.O. SHUT V/V
F.O. YES SHUT V/V CONDITION NOR. Sh 5 NO
YES
IGN. READY
BY ACC S R
OP
L S
BLR F.O. SHUT V/V OPEN
*2
A C C
IGN. SET
S
*1
CL
YES
R
ALL F.O. BNR STOP S NO ALL BNR OFF
NO
*7
R
NO YES
#090
FURNACE YES PURGE AIR RATE BY ACC
S R
IGN. AIR RATE
IGNITION ORDER
L S
*4
YES BY ACC
BASE F.O. BNR
ON OFF BASE F.O. BNR
(6)-1 THE CONTROL POSITION IS SELECTED IN ACCORDANCE WITH Sh 1.
Sh 1
(2) WITH OWN GAS BURNER FIRING (A) EXECUTION OF IGNITION F.O. RATE SETTING AND CONFIRMATION. (B) OPENING OF THE ATOMIZING STEAM VALVE. (C) OPENING OF THE F.O. BURNER VALVE. (D) BURNER IGNITION SEQUENCE COMPLETED. (3) WITH ADJOINING BURNER (F.O. OR GAS) FIRING (A) OPENING OF THE ATOMIZING STEAM VALVE. (B) OPENING OF THE F.O. BURNER VALVE. (C) OPENING OF THE AIR REGISTER. (D) BURNER IGNITION SEQUENCE COMPLETED.
L S
NO.2 AIR REG. CLOSE
L S
Sh 12
BASE GAS BNR BURNING
NO.2 AIR REG. OPEN
L S
NO.3 AIR REG. CLOSE
L S
Sh 12
NO.3 AIR REG. OPEN
L S
NO.2 GAS BNR BURNING
IGN. AIR SET
A C C
A C C
Sh 12
FURNACE PURGE
NO.3 GAS BNR BURNING
AUTO MODE
BURNER IGNITION SEQUENCE (6)-2 F.O. DEPRESSION BY THE OPERATOR OF BASE, NO.2 OR NO.3 BURNER "ON" SWITCH IN THE "MANUAL" MODE TRIGGERS THE BURNER IGNITION SEQUENCE (SEE TABLE 1 FOR THE "AUTO" MODE). B.M.S., JUDGING THE OTHER BURNER OPERATING STATE, AUTOMATICALLY EXECUTES THE BURNER IGNITION SEQUENCE IN COMBINATION WITH A.C.C. (1) WITH ALL OTHER BURNS NOT IN USE (A) EXECUTION OF FURNACE PURGE AND CONFIRMATION OF SAME (AIR FLOW X TIME). (B) OPENING OF THE AIR REGISTER AND ATOMIZING VALVE. (C) EXCUTION OF IGNITION AIR & F.O. RATE SETTING AND CONFIRMATION OF SAME. (D) STARTING IGNITOR AND OPENING F.O. BNR VALVE. (E) BURNER IGNITION SEQUENCE COMPLETED.
ON OFF
BASE AIR REG. OPEN
Sh 12
IGNITER INSERT
BASE GAS BNR BURNING
L S
IGNITER STOP & RETRACT
DUAL BURNING S Sh 3 Sh 14
NO
R
BASE F.O. BNR INC. ORD
BASE ATOM. V/V OPEN
S
BASE BNR FLAME FAIL
R
NO.2 F.O. BNR BURNING
Sh 8
NO.3 F.O. BNR BURNING
BASE F.O. BNR BURNING Sh 2,3,5,7,8, 9,12,13,14
OTHER BNR BURNING *3 BASE BNR BURNING
DUAL BURNING
NO
*1
F/E ON
L S
10 SEC
YES
Sh 14
Sh BASE F.O. 3 BNR DEC. ORD
Sh 6
L S
*7
10 SEC IGNITION PERIOD
*6
*6
L S
BASE F.O. BNR V/V(FWD) OPEN
L S
BASE AIR REG. OPEN
L S
4 SEC
YES 2SEC
Sh 14
BASE F.O. BNR V/V(AFT) OPEN
TO Sh 12
*2
Sh 6 Sh 8
NO.2 F.O. BNR BURNING
NO.2 PURGE V/V OPEN
L S
NO.3 F.O. BNR BURNING
NO.3 PURGE V/V OPEN
L S
4 - 13
BMS-6 Sh. No. 6
BLOCK DIAGRAM OF BASE F.O. BURNER IGNITION SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
ALL F.O. BNR NOT RUNNING
ECC BMS
G S P
F.O. PUMP RUN TS F.O. TEMP. BY-PASS
F.O. RECIRC. V/V CLOSE
*5
L S
FO TEMP NOR
ON OFF
BLR F.O. STAND-BY Sh 1
Sh 2
*4
MANU. MODE
NO IGN. SET
*5 NO BLR F.O. SHUT V/V
ALL F.O. V/V CLOSE (LS)
OP CL BLR F.O. SHUT V/V
F.O. YES SHUT V/V CONDITION NOR. Sh 5 NO
YES
IGN. READY
BY ACC S R
OP
L S
BLR F.O. SHUT V/V OPEN
*2
A C C
IGN. SET
S
*1
CL
YES
R
ALL F.O. BNR STOP S NO ALL BNR OFF
NO
*7
R
NO YES
#090
FURNACE YES PURGE AIR RATE BY ACC
S R
IGN. AIR RATE
IGNITION ORDER
L S
*4
YES BY ACC
NO.2 F.O. BNR
ON OFF NO.2 F.O. BNR
Sh 1
ON OFF
BASE AIR REG. OPEN
L S
BASE AIR REG. CLOSE
L S
Sh 12
BASE GAS BNR BURNING
NO.2 AIR REG. OPEN
L S
NO.3 AIR REG. CLOSE
L S
Sh 12
NO.3 AIR REG. OPEN
L S
NO.2 GAS BNR BURNING
IGN. AIR SET
A C C
A C C
Sh 12
FURNACE PURGE
NO.3 GAS BNR BURNING
AUTO MODE Sh 12
IGNITER INSERT
NO.2 GAS BNR BURNING
L S
IGNITER STOP & RETRACT
DUAL BURNING S Sh 3 Sh 14
NO
R
NO.2 F.O. BNR INC. ORD
NO.2 ATOM. V/V OPEN
S
NO.2 BNR FLAME FAIL
R
BASE F.O. BNR BURNING
Sh 8
NO.3 F.O. BNR BURNING
NO.2 F.O. BNR BURNING Sh 2,3,5,7,8, 9,12,13,14
OTHER BNR BURNING *3 NO.2 BNR BURNING
DUAL BURNING
NO
*1
F/E ON
L S
10 SEC
YES
Sh 14
Sh NO.2 F.O. 3 BNR DEC. ORD
Sh 6
L S
*7
10 SEC IGNITION PERIOD
*6
*6
L S
NO.2 F.O. BNR V/V(FWD) OPEN
L S
NO.2 AIR REG. OPEN
L S
4 SEC
YES 2SEC
Sh 14
NO.2 F.O. BNR V/V(AFT) OPEN
TO Sh 12
*2
Sh 6 Sh 8
BASE F.O. BNR BURNING
BASE PURGE V/V OPEN
L S
NO.3 F.O. BNR BURNING
NO.3 PURGE V/V OPEN
L S
4 - 14
BMS-7 Sh. No. 7
BLOCK DIAGRAM OF NO.2 F.O. BURNER IGNITION SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
ALL F.O. BNR NOT RUNNING
ECC BMS
G S P
F.O. PUMP RUN TS F.O. TEMP. BY-PASS
F.O. RECIRC. V/V CLOSE
*5
L S
FO TEMP NOR
ON OFF
BLR F.O. STAND-BY Sh 1
Sh 2
*4
MANU. MODE
NO IGN. SET
*5 NO BLR F.O. SHUT V/V
ALL F.O. V/V CLOSE (LS)
OP CL BLR F.O. SHUT V/V
F.O. YES SHUT V/V CONDITION NOR. Sh 5 NO
YES
IGN. READY
BY ACC S R
OP
L S
BLR F.O. SHUT V/V OPEN
*2
A C C
IGN. SET
S
*1
CL
YES
R
ALL F.O. BNR STOP S NO ALL BNR OFF
NO
*7
R
NO YES
#090
FURNACE YES PURGE AIR RATE BY ACC
S R
IGN. AIR RATE
IGNITION ORDER
L S
*4
YES BY ACC
NO.3 F.O. BNR
ON OFF NO.3 F.O. BNR
Sh 1
ON OFF
BASE AIR REG. OPEN
L S
BASE AIR REG. CLOSE
L S
Sh 12
BASE GAS BNR BURNING
NO.2 AIR REG. OPEN
L S
NO.2 AIR REG. CLOSE
L S
Sh 12
NO.3 AIR REG. OPEN
L S
NO.2 GAS BNR BURNING
IGN. AIR SET
A C C
A C C
Sh 12
FURNACE PURGE
NO.3 GAS BNR BURNING
AUTO MODE Sh 12
IGNITER INSERT
NO.3 GAS BNR BURNING
L S
IGNITER STOP & RETRACT
DUAL BURNING S Sh 3 Sh 14
NO
R
NO.3 F.O. BNR INC. ORD
NO.3 ATOM. V/V OPEN
S
NO.3 BNR FLAME FAIL
R
BASE F.O. BNR BURNING
Sh 8
NO.2 F.O. BNR BURNING
NO.3 F.O. BNR BURNING Sh 2,3,5,7,8, 9,12,13,14
OTHER BNR BURNING *3 NO.3 GAS BNR BURNING
DUAL BURNING
NO
*1
F/E ON
L S
10 SEC
YES
Sh 12
Sh NO.3 F.O. 3 BNR DEC. ORD
Sh 6
L S
*7
10 SEC IGNITION PERIOD
*6
*6
L S
NO.3 F.O. BNR V/V(FWD) OPEN
L S
NO.3 AIR REG. OPEN
L S
4 SEC
YES 2SEC
Sh 14
NO.3 F.O. BNR V/V(AFT) OPEN
TO Sh 12
*2
Sh 6 Sh 8
BASE F.O. BNR BURNING
BASE PURGE V/V OPEN
L S
NO.2 F.O. BNR BURNING
NO.2 PURGE V/V OPEN
L S
4 - 15
BMS-8 Sh. No. 8
BLOCK DIAGRAM OF NO.3 F.O. BURNER IGNITION SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
ECC BMS
Sh 7 NO.2 F.O. BNR BURNING Sh 12 NO.2 GAS BNR BURNING F.O. RECIRC. V/V OPEN
*2
Sh 8 NO.3 F.O. BNR BURNING Sh 12 NO.3 GAS BNR BURNING
*3
L S
F.O. RECIRC. MODE
(9) - 2 (3)
Sh 12 BASE GAS BNR BURNING
#010 Sh 6 BASE F.O. BNR
BASE F.O. BNR BURNING
(9) - 2 (2) (3)
ON OFF
L S
(7 - 2) ON OFF
(7 - 2) NO.2 F.O. BNR
Sh 1
L S
BASE F.O. BNR V/V CLOSE
L S
*2
BASE F.O. BNR V/V CLOSE
L S
*3
(9) - 2 (1)
IGN. START SEQ.
ON
BASE F.O. PURGE V/V OPEN
MANU. MODE
OFF
ALL BNR AIR REG. OPEN
L S
FURNACE PURGE ORD.
A C C
*2
FURNACE YES PURGE AIR RATE BY ACC NO
NO.2 PURGE V/V CLOSE
L S
NO.3 PURGE V/V CLOSE
L S
ALL BNR AIR REG. CLOSE
L S
BOILER STOP
A C C
NO.2 AIR REG. CLOSE
L S
NO.2 BNR ATOM. V/V CLOSE
L S
NO.1 PURGE V/V CLOSE
L S
NO.3 PURGE V/V CLOSE
L S
ALL BNR AIR REG. CLOSE
L S
BOILER STOP
A C C
NO.3 AIR REG. CLOSE
L S
NO.3 BNR ATOM. V/V CLOSE
L S
NO.1 PURGE V/V CLOSE
L S
NO.2 PURGE V/V CLOSE
L S
ALL BNR AIR REG. CLOSE
L S
BOILER STOP
A C C
#030
#010
ON #030
S
OFF
NO.2 F.O. BNR V/V CLOSE
R
L S
NO.2 F.O. PURGE V/V OPEN
L S
Sh 7
NO.2 F.O. BNR BURNING
Sh 12
NO.2 GAS BNR BURNING
NO.2 ATM. STM V/V CLOSE
L S
*1
Sh 6 Sh 12
BASE F.O. BNR BURNING BASE GAS BNR BURNING
NO.2 F.O. BNR V/V CLOSE
L S
*3
Sh 8 Sh 12
NO.3 F.O. BNR BURNING NO.3 GAS BNR BURNING
(9) - 2 (1)
(7 - 2) NO.3 F.O. BNR
NO.3 F.O. BNR
L S
(9) - 2 (3)
Sh NO.2 F.O. BNR 3,4 DEC. ORD NO.2 F.O. BNR
BASE BNR ATOM. V/V CLOSE
R
Sh BASE F.O. BNR 3 DEC. ORD
NO.2 F.O. BNR
L S
#030 BASE F.O. BNR V/V CLOSE
S
BASE AIR REG. CLOSE
ON
*3
OFF
ALL BNR AIR REG. OPEN
L S
FURNACE PURGE ORD.
A C C
(9) - 2 (3) #010
Sh NO.3 F.O. BNR 3,4 DEC. ORD
ON
#030
S
OFF
NO.3 F.O. BNR V/V CLOSE
R Sh 8
NO.3 F.O. BNR BURNING
Sh 12
NO.3 GAS BNR BURNING
#030
FURNACE YES PURGE AIR RATE BY ACC NO
L S
NO.3 F.O. PURGE V/V OPEN
L S
NO.3 ATM. STM V/V CLOSE
L S
*1
NO.3 F.O. BNR V/V CLOSE
L S
*2
(9) - 2 (2) (3) (9)-1 SELECTION OF CONTROL POSITION THE CONTROL POSITION IS SELECTED IN ACCORDANCE WITH Sh 1. (9)-2 F.O. BURNER EXTINGUISHING SEQUENCE DEPRESSION BY THE OPERATOR OF BASE, NO.2 OR NO.3 BURNER "OFF" SWITCH IN THE "MANUAL" MODE TRIGGERS THE BURNER EXTINGUISHING SEQUENCE (SEE TABLE 1 FOR THE "AUTO" MODE). B.M.S., JUDGING THE OTHER BURNER OPERATING STATE, AUTOMATICALLY EXECUTES THE BURNER EXTINGUISHING SEQUENCE IN COMBINATION WITH A.C.C. (1) WITH ALL OTHER BURNS NOT IN USE (A) CLOSING OF THE F.O. BURNER VALVE (B) EXCUTION OF FURNACE PURGE AND CONFIRMATION OF SAME. (AIR FLOW X TIME) (C) CLOSING OF THE AIR REGISTER AND ATOMIZING VALVE. (D) BURNER EXTINGUISHING SEQUENCE COMPLETED. (2) WITH OWN GAS BURNER FIRING (A) CLOSING OF THE F.O. BURNER VALVE. (B) EXECUTION OF BURNER PURGE AND CONFIRMATION OF SAME (TIME). (C) CLOSING OF THE ATOMIZING STEAM VALVE. (D) BURNER EXTINGUISHING SEQUENCE COMPLETED.
Sh 6 Sh 12 Sh 7 Sh 12
Sh 1
BASE F.O. BNR BURNING BASE GAS BNR BURNING (9) - 2 (1)
NO.2 F.O. BNR BURNING NO.2 GAS BNR BURNING
AUTO MODE
(3) WITH ADJOINING BURNER (F.O. OR GAS) FIRING (A) CLOSING OF THE F.O. BURNER VALVE. (B) EXECUTION OF BURNER PURGE AND CONFIRMATION OF SAME (TIME). (C) CLOSING OF THE AIR REGISTER AND ATOMIZING STEAM VALVE. (D) BURNER EXTINGUISHING SEQUENCE COMPLETED.
4 - 16
ALL BNR AIR REG. OPEN
L S
FURNACE PURGE ORD.
A C C
BMS-9 Sh No. 9
FURNACE YES PURGE AIR RATE BY ACC NO
#030
BLOCK DIAGRAM OF F.O. BURNER EXTINGUISH SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
BMS CONTROLLER ABNORMAL NO.2 BLR N2 VENT V/V OPEN NO.2 BOILER GAS SUPPLY SHUT-OFF CONDITION (SAME TO NO.1 BLR)
B.O.G. PRESS.
LOW
NO.1 BLR GAS VALVE TRIP
NO.1 BLR GAS V/V TRIP
ALM. SEQ.
#090
NO.2 BLR GAS V/V CLOSE
#010 Sh 12
NO.1,NO.2 OR NO.3 GAS BNR BURNING(GAS V/V OP)
BOILER GAS V/V TRIP
NO.1 BLR N2 VENT V/V OPEN
S R
B.O.G. PRESS.
Sh 5
NO.1 BLR GAS V/V CLOSE
HIGH
(10)-2
BOIER TRIP CONDITION
NO.1 BLR GAS V/V CLOSE PB
BOTH BOILER TRIP MASTER N2 VENT V/V OPEN
#015
MASTER GAS V/V TRIP
S R
MASTER GAS V/V CLOSE ORD.
TO E.S.D.S. PANEL
(10)-2
MASTER GAS V/V CLOSE PB
BOTH GAS V/V CLOSE
ALM. SEQ. BOG HEATER ABNORMAL
MASTER GAS VALVE TRIP
GAS DUCT FAN BOTH STOP
GAS LEAK DETECTED
(10)-3 TO F.O. BOOST-UP ORD.
Sh 3,4
GAS TEMP. LOW/LOW MASTER GAS V/V MANUAL TRIP VAPOR HEADER PRESS LOW/LOW
E/R VENTILATION FAN STOP
(10)-1 BOILER GAS SUPPLY SHUT-OFF CONDITIONS WHEN CONDITIONS PROHIBITING HE MASTER GAS VALVE OPENING OR THE CONDITIONS PROHIBITING THE GAS BURNING OPERATION ARE ACTIVATED, THE BOILER GAS VALVE OF EACH BOILER IS SHUT-OFF. AT THE SAME TIME THAT THE BOILER GAS VALVE IS CLOSED, THE PIPE LINE IS N2 PURGED (AS PER Sh 11) TO BLOW OUT RESIDUAL GAS. (10)-2 RESET OPERATION AFTER BOILER GAS SUPPLY SHUT-OFF THE RESET OPERATION FOR RESTART TAKES PLACE AS FOLLOWS; (A) INDENTIFICATION OF THE CAUSE OF THE SHUT-OFF, FOR RESTORATION. (B) FOLLOWING THE REPAIR OF THE SHUT-OFF FAILURE, THE OPERATOR RESETS THE CIRCUIT.
(10)-3 F.O. BOOST-UP ORDER WHEN CONDITIONS FOR THE MASTER GAS SUPPLY VALVE SHUT-OFF ARE ESTABLISHED IN THE GAS FIRING PROCESS, B.M.S. GIVES IMMEDIATELY ORDER TO CLOSE THE MASTER GAS VALVE AND AT THE SAME TIME, IN COMBINATION WITH A.C.C., THE F.O. BURNER STARTS FIRING IN ORDER TO TRANSFER FROM GAS COMBUSTION TO F.O. COMBUSTION WITHOUT INTERRUPTION. ALSO, MONITORING THE COMBUSTION WITH THE GAS BURNER USING THE GAS HEADER PRESSURE ANF FLAME SCANNER, B.M.S. CAUSES THE BOILER GAS VALVE AND BURNER GAS VALVE TO CLOSE SEQUENTIALLY.
BMS-10 NOTE : NO. 1 BOILER SHOWN. NO. 2 BOILER TO BE SAME.
4 - 17
Sh. No. 10
BLOCK DIAGRAM OF MASTER GAS & BOILER GAS SUPPLY SHUT-OFF CONDITION
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
REMOTE IAS
MAST ER N2 VENT V/V OPEN
L S
(11) - 1
#060 MASTER N2 PURGE V/V OPEN
#010 L MASTER N2 VENT V/V CLOSE S
S R
MASTER GAS V/V
OP CL
MASTER GAS VALVE INTERLOCK Sh 10 N
Y
S R
MASTER GAS V/V OPEN
L S
MASTER GAS V/V CLOSE
L S
MASTER N2 PURGE ON
BLR N2 PURGE ON
NO.1 BLR GAS V/V
OP CL
NO.1 BLR GAS VALVE INTERLOCK Sh 10 N
L S
(11) - 1
(11) - 2
#030 BLR N2 PURGE V/V OPEN
BOILER GAS V/V CLOSE
#015
MASTER N2 PURGE V/V CLOSE
L S
BLR N2 PURGE V/V CLOSE
L S
L S
#010 Y
S R
NO.1 HDR N2 VENT V/V CLOSE
NO.1 BLR GAS V/V OPEN
NO.1 BLR GAS V/V CLOSE
F.O. BNR. BURNING
L S
BLR GAS V/V OPEN
L S
Sh 12
#035 Y
NO.1 BLR GAS V/V CLOSE
L S
NO.1 BLR GAS V/V CLOSE
L S
L S
ALL BNR GAS V/V CLOSE
L S
HDR N2 VENT V/V OPEN
L S
#030
N
(11 - 2)
HDR N2 PURGE V/V CLOSE
#025
#030
NO.2 BLR GAS V/V
OP CL
NO.2 BLR GAS VALVE INTERLOCK Sh 10 N
HDR N2 PURGE V/V OPEN
L S
HDR N2 VENT V/V OPEN
L S
HDR N2 PURGE V/V CLOSE
L S
#010 Y
(11)-1 MASTER N2 PURGE THE LINE FROM THE MASTER GAS VALVE OUTLET TO EACH OF THE BOILER GAS VALVE INLETS ISPURGED WITH N2. THERE ARE TWO MODES AVAILABLE FOR THIS N2 PURGE : "AUTO" MODE IN WHICH AN AUTOMATIC N2 PURGE IS PERFORMED UPON THE CLOSING OF THE MASTER GAS VALVE, AND "MAN." MODE IN WHICH A MANUAL N2 PURGE IS PERFORMED BY OPERATING THE MASTER N2 PURGE "ON" SWITCH AT THE "ECR" POSITION.
S R
NO.2 BLR GAS V/V OPEN
L S
NO.2 BLR GAS V/V CLOSE
L S
NO.2 HDR N2 VENT V/V CLOSE
L S
BLR GAS V/V OPEN
Sh 12
SAME AS NO.1 HEADER N2 PURGE SEQUENCE
(11)-2 GAS HEADER N2 PURGE THE LINE FROM EACH BOILER GAS VALVE OUTLET TO EACH BURNER IS PURGED WITH N2. THERE ARE TWO PURGING MODES : "AUTO" MODE USING AN AUTOMATIC N2 PURGE UPON CLOSING OF THE BOILER GAS VALVE, AND "MAN" MODE USING MANUAL N2 PURGE BY OPERATING THE HEADER N2 PURGE "ON" SWITCH AT THE "BOP" POSITION. (CAUTION) DURING THE HEADER N2 PURGE, IF THE F.D. FAN, IS STOPPED, EACH BURNER CASE VALVE IS CLOSED, THE HEADER VENT VALVE IS OPENED, AND THE GAS HEADER ONLY IS N2 PURGED.
(11)-3 GAS BURNER N2 PURGE THE LINE FROM EACH BURNER GAS VALVE OUTLET TO EACH GAS BURNER IS PURGED WITH N2. UPON CLOSING OF THE GAS BURNER VALVE, AN AUTOMATIC N2 PURGE IS PERFORMED. ("MAN" OPERATION IS UNAVAILABLE.) IT SHOULD BE NOTED THAT THIS N2 PURGE IS NOT PERFORMED WHEN ONE OF THE BOILER SHUT-DOWN CONDITIONS HAS BEEN ACTIVATED, OR WHEN ALL THE BURNERS ARE SHUT-DOOWN. EXCEPT THE CONDITION OF BURNER PURGE ESTABLISH. IN SUCH A CASE, (11)-2 GAS HEADER N2 PURGE TAKES PLACE.
NOTE * 1 : FURNACE PURGE ESTABLISH
BMS-11 Sh No. 11
4 - 18
BLOCK DIAGRAM OF MASTER & BOILER GAS V/V OPEN / CLOSE SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
ECC BMS
BLR GAS STAND-BY
NO
BASE GAS BNR
Sh 1
AUTO MODE
Sh 11
BLR GAS V/V OPEN
Sh 1
MANU. MODE
IGN. SET
GAS STAND-BY
YES
Sh 2,3
IGN. READY
BY ACC
GAS CONT. V/V IS CONFIRMED BY ACC IGN. SET ORD
A C C
ON OFF
BASE GAS BNR
ON OFF Sh BASE GAS 3 BNR INC. ORD
S
BASE GAS BNR START
Sh 13,14
R Sh 14
Sh 6
NO.2 GAS BNR
BASE BNR FLAME FAIL
BASE GAS BNR V/V OPEN
BASE GAS BNR BURNING
Sh 2,3,6 7,8,9,13
BASE F.O. BNR BURNING
ON OFF
NO.2 GAS BNR
ON
S
OFF
R
Sh 14
Sh 7
NO.2 GAS BNR START NO.2 GAS BNR V/V OPEN
Sh NO.2 GAS 3,4 BNR INC. ORD
NO.3 GAS BNR
L S
L S
Sh 13,14 NO.2 GAS BNR BURNING
Sh 2,3,6 7,8,9,13
NO.2 BNR FLAME FAIL
NO.2 F.O. BNR BURNING
ON OFF
NO.3 GAS BNR
ON
S
OFF
R NO.3 GAS BNR V/V OPEN
Sh NO.3 GAS 3,4 BNR INC. ORD Sh 14
NO.3 GAS BNR START L S
Sh 13,14 NO.3 GAS BNR BURNING
Sh 2,3,6, 7,8,9,13
NO.3 BNR FLAME FAIL
Sh BLR GAS V/V 9 CLOSE
Sh 8
(12)-1 SELECTION OF CONTROL POSITION THE CONTROL POSITION IS SELECTED IN ACCORDANCE WITH Sh 1. (12)-2 OPENING OF BOILER GAS VALVE IT IS ONLY BY THE OPERATOR DEPRESSING THE BOILER GAS VALVE "OPEN" SWITCH UPON CONFIRMING THAT THE BOILER GAS SHUT-OFF CONDITIONS (SHOWN IN Sh 10) ARE ALL NORMAL, THAT THE BOILER GAS VALVE CAN BE OPENED.
NO.3 F.O. BNR BURNING
(12)-3 GAS BURNER IGNITION WITH THE F.O. BURNER FIRING IN THE "MANUAL" MODE, DEPRESSION BY THE OPERATOR OF THE GAS BURNER "ON" SWITCH CAUSES THE GAS BURNER VALVE TO OPEN AND GAS COMBUSTION TO TAKE PLACE.
BNS-12 Sh. No. 12
4 - 19
BLOCK DIAGRAM OF GAS BURNER IGNITION SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
REMOTE IAS
BASE GAS BNR
BASE GAS BNR
ECC BMS
ON OFF Sh BASE GAS BNR 3,4 DEC. ORD
ON
(13) - 2 (2) (3) #015
S
OFF Sh 12
BASE GAS BNR BURNING
Sh 12
BASE GAS BNR START
BASE GAS BNR V/V CLOSE
R
L S
BASE N2 PURGE V/V OPEN
L S
NO.2 GAS BNR
NO.2 GAS BNR
ON
BASE F.O. BNR BURNING
Sh 7 Sh 12
NO.2 F.O. BNR BURNING NO.2 GAS BNR BURNING
Sh 8 Sh 12
NO.3 F.O. BNR BURNING NO.3 GAS BNR BURNING
BASE GAS BNR V/V CLOSE
L S
FURNACE PURGE ORDER
L S
#030 A C C
YES FURNACE PURGE RATE ESTA
ALL BNR AIR REG. CLOSE
L S
FURNACE PURGE STOP
A C C
#090
NO
(13) - 2 (1)
Sh NO.2 GAS BNR 3,4 DEC. ORD
(13) - 2 (2) (3) #015
S
OFF Sh 12
NO.2 GAS BNR BURNING
Sh 12
NO.2 GAS BNR START
NO.2 GAS BNR V/V CLOSE
R
L S
NO.2 N2 PURGE V/V OPEN
L S
ALL BNR AIR REG. OPEN
NO.3 GAS BNR
FURNACE PURGE CLOSE
OFF
ON
NO.3 GAS BNR
L S
(13) - 2 (2)
ALL BNR AIR REG. OPEN Sh 6
ALL BNR AIR REG. CLOSE
ON
Sh 7
NO.2 F.O. BNR BURNING
Sh 6 Sh 12
BASE F.O. BNR BURNING BASE GAS BNR BURNING
Sh 8 Sh 12
NO.3 F.O. BNR BURNING NO.3 GAS BNR BURNING
NO.2 GAS BNR V/V CLOSE
L S
FURNACE PURGE ORDER
ALL BNR AIR REG. CLOSE
L S
FURNACE PURGE CLOSE
L S
(13) - 2 (2) #030 A C C
YES FURNACE PURGE RATE ESTA
L S
FURNACE PURGE STOP
A C C
#090
NO
(13) - 2 (1)
ALL BNR AIR REG. CLOSE
OFF Sh NO.3 GAS BNR 3,4 DEC. ORD
ON
(13) - 2 (2) (3) #015
S
OFF Sh 12
NO.3 GAS BNR BURNING
Sh 12
NO.3 GAS BNR START
NO.3 GAS BNR V/V CLOSE
R
L S
NO.3 N2 PURGE V/V OPEN
L S
ALL BNR AIR REG. OPEN Sh 8
(13)-1 SELECTION OF CONTROL POSITION THE CONTROL POSITION IS SELECTED IN ACCORDANCE WITH Sh 1. (13)-2 GAS BURNER EXTINGUISHING SEQUENCE DEPRESSION BY THE OPERATOR OF BASE, NO.2 OR NO.3 BURNER "OFF" SWITCH IN THE "MANUAL" MODE TRIGGERS THE EXTINGUISHING SEQUENCE. (SEE TABLE 1 (BMS-16) FOR THE "AUTO" MODE) B.M.S., JUDGING THE OTHER BURNER OPERATING STATE, AUTOMATICALLY EXECUTES THE GAS BURNER EXTINGUISHING SEQUENCE IN COMBINATION WITH A.C.C. (1) WITH ALL OTHER BURNERS NOT IN USE (A) CLOSING OF THE GAS BURNER VALVE AND BOILER GAS VALVE. (B) BURNER EXTINGUISHING SEQUENCE COMPLETED.
NO.3 F.O. BNR BURNING
Sh 6 Sh 12
BASE F.O. BNR BURNING BASE GAS BNR BURNING
Sh 7 Sh 12
NO.2 F.O. BNR BURNING NO.2 GAS BNR BURNING
Sh 1
AUTO MODE
Sh 1
MANU. MODE
(2) WITH OWN F.O. BURNER FIRING (A) CLOSING OF THE GAS BURNER VALVE. (B) EXECUTION OF BURNER N2 PURGING AND CONFIRMATION OF SAME (TIME). (C) GAS BURNER EXTINGUISHING SEQUENCE COMPLETED.
NO.3 GAS BNR V/V CLOSE
L S
FURNACE PURGE ORDER
4 - 20
L S
NO.3 AIR REG. CLOSE
L S
(13) - 2 (2) #030 A C C
YES FURNACE PURGE RATE ESTA NO
(13) - 2 (1)
(3) WITH ADJOINING BURNER (F.O. OR GAS) FIRING (A) CLOSING OF THE GAS BURNER VALVE. (B) EXECUTION OF BURNER N2 PURGING AND CONFIRMATION OF SAME (TIME). (C) CLOSING OF THE AIR REGISTER. (D) BURNER EXTINGUISHING SEQUENCE COMPLETED.
NO.3 N2 PURGE V/V CLOSE
BMS-13 Sh. No. 13
ALL BNR AIR REG. CLOSE
L S
FURNACE PURGE STOP
A C C
#090
BLOCK DIAGRAM OF GAS BURNER EXTINGUISH SEQUENCE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
FLAME SCANNER 1 Sh 6
BASE F.O. BNR BURNING
Sh 12
BASE GAS BNR START
(14)-1 FLAME SCANNER TWO (2) FLAME SCANNERS ARE PROVIDED FOR EACH OF THE BURNS. ADOPTED FLAME SCANNER HAS IR (INFRA RED) AND UV (ULTRA VIORET) DETECTING FUNCTION IN ONE (1) UNIT. FOR ADOPTED FLAME SCANNER, OPERATING MODE CAN BE SELECTED. IN THIS SYSTEM, OPERATION MODE "IR OR UV" WILL BE CHOOSED. THEREFORE, FLAME SCANNER ALWAYS DETECT THE FLAME BY IR OR UV.
YES
NO
(14)-2 INTERLOCK TWO (2) FLAME SCANNERS ARE PROVIDED FOR EACH OF THE BURNERS. THE FLAME OF BURNER WILL BE RECOGNIZE BY ONE OF SIGNALS FOR TWO FLAME SCANNER. THEREFORE, WHEN BOTH FLAME SCANNER DETECT LOSS OF FLAME, F.O. AND GAS FOR OWN BURNER WILL BE SHUT-OFF. (FLAME FAILURE)
BASE BNR BURNING
FLAME SCANNER 2
YES BASE F / E ON
Sh 6
NO
S BASE F.O. BNR
ON
BASE BNR FLAME FAIL
R
Sh 2,6,12
BASE BNR FLAME FAIL ALARM
Sh 7
NO.2 F.O. BNR BURNING
Sh 12
NO.2 GAS BNR START
L S
BASE GAS BNR V/V CLOSE
L S
BASE BNR ATOM. V/V CLOSE
L S
BASE AIR REG. CLOSE
L S
OFF
(RESET)
FLAME SCANNER 1
BASE F.O. BNR V/V CLOSE
YES
ALL BNR FLAME FAIL
Sh 5
NO NO.2 BNR BURNING
FLAME SCANNER 2
YES NO.2 F / E ON
Sh 7
NO
S NO.2 F.O. BNR
ON
NO.2 BNR FLAME FAIL
R
Sh 2,7,12
OFF (RESET)
NO.2 F.O. BNR V/V CLOSE
L S
NO.2 GAS BNR V/V CLOSE
L S
NO.2 BNR ATOM. V/V CLOSE
L S
NO.2 AIR REG. CLOSE
L S
NO.3 F.O. BNR V/V CLOSE
L S
NO.3 GAS BNR V/V CLOSE
L S
NO.3 BNR ATOM. V/V CLOSE
L S
NO.3 AIR REG. CLOSE
L S
NO.2 BNR FLAME FAIL ALARM
Sh 8
NO.3 F.O. BNR BURNING
Sh 12
NO.3 GAS BNR START
FLAME SCANNER 1
YES
NO
T56 NO.3 BNR BURNING
FLAME SCANNER 2 NO
YES NO.3 F / E ON
Sh 8
T57 T58
T59
S NO.3 F.O. BNR
ON
R
NO.3 BNR FLAME FAIL
Sh 2,8,12
OFF (RESET) NO.3 BNR FLAME FAIL ALARM
BMS-14 Sh. No. 14
4 - 21
BLOCK DIAGRAM OF BURNER FLAME MONITORING SYSTEM
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
LOCAL BGB
BASE BNR IGNITER
PURGE
ON
IGNITER FORWARD & SPARK BASE BNR AIR REG. OPEN
3 min
NOR EMERGENCY SWITCH
OFF
ALL BNR AIR REG. OPEN
BURN AIR FLOW CONTROL
AUTO
F.O. FLOW CONTROL
AUTO
MAN
MAN
L S
S R
PURGE FINISH
NO
BASE F.O. BNR V/V
SET F.D.F. INLET VANE OPENING ANGLE FOR FURNACE PURGE
CLOSE
BASE F.O. V/V OPEN
OPEN
NO.2 BNR IGNITER
OFF ON
F/E ON
YES
L S
IGNITER FORWARD & SPARK NO.2 BNR AIR REG. OPEN
SET F.D.F. INLET VANE OPENING ANGLE FOR IGNITION
L S
S
CLOSE OPEN
L S
BASE ATOMIZ. STEAM V/V OPEN SET F.O. FLOW CONT. V/V OPENING ANGLE FOR IGNITION
ALL BNR AIR REG. CLOSE
BLR H.F.O SHUT V/V
L S
R BLR HFO SHUT V/V OPEN
NO
NO.2 F.O. BNR V/V
HFO RECIRC. V/V CLOSE
CLOSE
NO.2 F.O. V/V OPEN
OPEN
L S
NO.2 ATOMIZ. STEAM V/V OPEN
NO.3 BNR IGNITER
OFF ON
F/E ON
YES
L S
IGNITER FORWARD & SPARK NO.3 BNR AIR REG. OPEN
L S
S R NO
NO.3 F.O. BNR V/V
CLOSE
NO.3 F.O. V/V OPEN
OPEN
L S
NO.3 ATOMIZ. STEAM V/V OPEN
F/E ON
YES
L S
(15 - 1) BMS EMERGENCY OPERATION THE F.O. BURNER CAN START OR STOP BY USING "EMERGENCY OPERATION PANEL" AT LOCAL (BGB) POSITION, WHEN THE BMS CONTROLLER CANNOT OPERATE. IN THIS CASE, OPERATOR MUST WATCH AND CONFIRM TO ALL INTERLOCK CONDITIONS DIRECTORY. WHEN THE ABC CONTROLLER IS RUNNING NORMALLY,
BMS-15
OPERATOR CAN SELECT THE MODE(AUTO/MAN) OF ABC CONTROL (AIR FLOW AND FO FLOW) AFTER BURNER IGNITION.
Sh. No. 15
4 - 22
BLOCK DIAGRAM OF BMS EMERGENCY MODE
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 4.4.2 Automatic Boiler Control System Diagram 1. Symbol List for ABC Function Logic General of ABC Function Block #1 Input Signal (Analog) X1
#2 Input Signal (Analog) X2 #3 Input Signal (Analog) X3
PI Function Block
Function Block Symbol
Input Signal
MIN
X1 : Input 1 X2 : Input 2 X3 : Input 3 X4 : Input 4 Y : Output
Minimum The smallest input is output.
MAX
X1 : Input 1 X2 : Input 2 X3 : Input 3 X4 : Input 4 Y : Output
Maximum The largest input is output.
Analog Signal Terminal Digital Signal Terminal
#4 Input Signal (Digital) X4
Output Signal (Analog) Y
X1 : Input 1 X2 : Input 2 LSE
Y : Output X1 : Input 1 X2 : Input 2 HSE
Function Block Symbol
Input Signal
PI
X1 : Set Point X2 : Process Value X3 : Tracking Signal X4 : Tracing Y : Output
LAG
SFT
X1 : Input X2 : Parameter Y : Output X1 : Input 1 X2 : Input 2 X3 : Switch Y : Output
SW
X1 : Input 1 X2 : Input 2 X3 : Switch Y : Output X1 : Input 1 X2 : Input 2
ADD
Remarks
Y : Output X1 : Input 1 X2 : Parameter
Proportional and Integral When X4=0 ; Output Y is Proportional and Integral. When X4=1 ; Y=X3 Input
LLM
Y : Output X1 : Input 1 X2 : Parameter
Output HLM
Lag t Switch with Relaxation When X3=0 ; Y=X1 When X3=1 ; Y=X2
Switch When X3=0 ; Y=X1 When X3=1 ; Y=X2
X2
X1
HMS
X1 : Input 1 X2 : Parameter X3 : Hysterisys
LMS
X1 : Input 1 X2 : Parameter X3 : Hysterisys
DMS
X1 : Input 1 X2 : Parameter X3 : Hysterisys
Output
X1 X2
Y : Output
t
X3=1
Y : Output
t
Output
X3=1
Y : Output
t
Addition Y=X1+X2
Y : Output
Y : Output X1 : Input 1 X2 : Input 2 SUB
BFP
Subtraction Y=X1-X2
Y : Output
Y : Output X1 : Input 1 X2 : Input 2 MUL
Multiply Y=X1*X2
DIV
Divide Y=X1/X2
Y : Output
4 - 23
Lower Selector If X1 ≤ X2 Then Y=X1 If X1 > X2 Then Y=X2
High Selector If X1 ≥ X2 Then Y=X1 If X1 < X2 Then Y=X2
Low Limit If X1 ≥ X2 Then Y=X1 If X1 < X2 Then Y=X2
High Limit If X1 ≤ X2 Then Y=X1 If X1 > X2 Then Y=X2
High Monitor Switch If X1 ≥ X2 Then Y=1 If X1 < X2-X3 Then Y=0
Low Monitor Switch If X1 ≤ X2 Then Y=1 If X1 > X2+X3 Then Y=0
Deviation Monitor Switch If abs(X1-X2) ≥ X3 Then Y=1 If abs(X1-X2) < X3 Then Y=0
Band Pass Filter If abs(X1-X2) ≤ X3 Then Y=1 If abs(X1-X2) > X3 Then Y=0
AND
X1 : Input 1 X2 : Input 2 X3 : Input 3 X4 : Input 4 Y : Output
AND Gate If all input are 1, Then Y=1.
OR
X1 : Input 1 X2 : Input 2 X3 : Input 3 X4 : Input 4 Y : Output
OR Gate If any input are 1, Then Y=1.
Y : Output X1 : Input 1 X2 : Input 2
X1 : Input 1 X2 : Parameter X3 : Hysterisys
Remarks
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
Function Block Symbol S
Input Signal X1 : Set X2 : Reset
R
RS
Y : Output X1 : Input NOT
Y : Output X1 : Input
Flip-Flop When X1=1 and X2=0 then Y=1 When X2=1 then Y=0
NOT Gate When X1=1 then Y=0 When X1=0 then Y=1
X1 : Input
X1
X2
Y
0 1 0 1
0 0 1 1
Keep 1 0 0
X1
X2
0 1
1 0
Output
TX
X1 : Input
PX : Pressure Transmitter FM : Follow Meter VIS : Viscosity Meter
DPX : Differential Transmitter SMK : Smoke Indicator N2 :Gas Content Sensor
Temperature Sensor (Thermal Resistance Bulb, Pt100)
t Off Delay Timer Input
AS
Output
Time
I/P
Control Valve
I/P
Control Valve with Air Lock Valve
t
Change Rate Limit Input
AS
DRL
Y : Output
Remarks
Temperature Sensor (Thermo Couple)
Time
OFT
Y : Output
Name
Transmitters Detecting Devise
On Delay Timer Input
ONT
Y : Output
Symbol
Remarks
Output
Air Lock Valve In case of supply air failure, opening position is kept.
t
X1 : Input Square Root
SQR
Piston Valve
Y : Output
ASP
X1 : Increase X2 : Decrease X3 : Tracking Signal X4 : Tracking Y : Output
MAN
X1 : Analog Input X2 : Auto / Manual Change Over X3 : Increase X4 : Decrease Y : Output
Set Point Setter When X4=0, Output value is kept. And output value is manipulated by X1 and X2. When X4=1, Output is X3. Auto Manual Station When X2=0, Output value is X1. When X2=1, Output value is kept and output value is manipulated by X3 and X4.
SV 100%
Y : Output
LEAD
Y : Output X1 : Input X2 : Parameter Y : Output
LEAD
Output
In
Function Generator Output is the predetermined value which is corresponding to input value. Input
Out
X1 : Input
t
t
4 - 24
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
Symbol
162B-S
NAME
Remarks
Tag Number
Field
Location
A/M
Auto / Manual Station
Manual Station
To ********
Arrow
PV
Indicator
Hardware Component
EM-M : Manual Loader for Emergency Operation mV/I : Converter for Thermo-couple ohm/I : Converter for thermal Resistance Bulb Relay : Relay IS : Intrinsic Safe Barrier
4 - 25
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 2. ABC Logic Diagram 1) Master Loop - 1
2) Master Loop - 2
Field
165B-1 SH Steam Pressure 0-8 MPa 4-20 mA
PX
PLC
Initial 75.4% 6.03
Master SP To Dump Control
SH STM Press. To Other Boiler
SV 1.2%
SH STM Press. To Dump & FD W. Control From BMS Auto Set Down
SFT
Out
SV 18%
In
SW
15bar
SUB
HMS
HMS
Auto Run
Auto Steaming Up
SH STM Press. From Other Boiler
SV 0%
HSE
Slave PLC
In Steam Press Limit
Master Signal To Other Boiler
SFT
Two BLR Auto Run & Slave PLC
Load Bias SP To Other Boiler
SW
Slave PLC
MIN
SV 200%
SV 0%
SV 0% HMS
SV 33%
LMS
Initial 100%
PI
SV 54%
HMS
SV 0%
In
Master Signal From Master Loop
Master Signal From Other Boiler
ASP Load Bias SP To Other Boiler
SV 27%
HMS
SV 16.8%
LAG
Total Fuel Flow From Total Fuel Flow
SV 0%
HMS
Auto Run
Auto Steaming Up
SV 54% SV 0%
Steam Up Rate
SW
SV 27%
Two BLR Auto Run
Load Bias SP From Other Boiler SW
Master Signal From Master Loop
Burner Draft From Air Flow Control
SV 0%
Slave PLC
SH Steam Press. From Dump Control
HSE 1bar
SV 16.8% SV 0%
SV 33% SV 0%
LMS
LMS
SV 0% LMS
Out
From Other BMS Master SP
ASP
SH Steam Pressure 0-8 MPa 4-20 mA
PX
Out
PLC
Field
165B-2
Air Flow Limit
AND
S
AND
R
AND
S
RS
AND
R
RS
SUB Boiler Load To F.O Flow, Gas Flow & Air Flow Control(Set Point)
MUL Master Signal To Master Loop(2)
SP
Load Bias To Other Boiler
3rd BNR Start/Stop To BMS
IAS IAS
SP Master SP BGB
2nd BNR Start/Stop To BMS
BGB Master SP
Load Bias
Field
Field
4 - 26
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
4) Fuel Oil Flow Control
3) Dump Control Field
Recommended BOG Gas Flow 0-8400 kg/hr : 4-20 mA From Yard System
Excess. BOG Dump Order on at Signal From Yard System
Field
Dump Available on at Signal From Yard System
370B FM
PLC
SW Master SP From Master Loop ADD
SV 0.6%
SH Steam Press. From Other Boiler HSE
SUB Gas C/V Position From Gas Flow Control
LAG
SUB M/T FF Signal From BMS
PI
HSE
Maximum Gas Flow C/V Open Set
Total Gas Flow From Total Fuel Flow
PI
Burner Limit
PI
LSE
SW
OR SV 0%
SW
To Gas Flow, Air Flow Control (Set Point) & Total Fuel Flow
PI
SV **%
SV 200%
HMS
FO BNR Stop
2 BNR Run
SW
0.23Mpa
SV 300%
In FO Press. To FO Flow
SV 7.7%
3 BNR Run
SW
PI SV 0%
Flow/Press. Select
SW
Recirculation Position
Ignition Position
SV **%
SV **%
HSE
HMS
Dump Piston Valve Open
SW SW
FO C/V Fix Position
Out
MAN
Ignition Position
SW FO Boost Up From BMS
OR
MUL
SW
AND
SW SW
SV 0%
FO Shut Off V/V Close
FO C/V Set From BMS
In
Out
Out
SV 100%
FO Flow (Based on Boiler Load)
SV 1%
HSE
SV 3%
LSE
SV 0%
SW
HMS SW
SV 80%
FO Mode : 0.5MPa Dual Mode : 0.4MPa
LAG
FO Press. To FO Press. Discharge Control
SV 0%
Gas C/V Position From Other Boiler
Fuel Oil Press. 0-3 MPa 4-20 mA
PX
Out
From BMS Auto Set Down
0.05MPa
FO Extinguish Seq. From BMS
SH Steam Press. From Master Loop
FO Max. Flow From Total Fuel Flow
SV 0.6%
Gas Flow
0.05MPa
SV 1.3%
(based on Boiler Load) From Gas Flow Control
0.1MPa
LAG
Boiler Load From Master Loop(2)
PLC
231B
Fuel Oil Flow 0-5500 kg/h 4-20 mA
Gas Flow To FO Flow
OFT
MAN In
Output From Other Boiler
In
Slave PLC
RELAY Output From Other Boiler
A/M
BGB
IAS
BGB
A/M
RELAY
Field
Field Dump Steam Press. Control Valve (1)
A/M
EM-M
I/P
AS
AS
I/P
Dump Steam Press. Control Valve (2)
AS
Dump Piston Valve
4 - 27
I/P
IAS
A/M
220B Fuel Oil Control Valve
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 5) Gas Flow Control (Gas Flow) Field
6) Gas Flow Control
249B Gas Flow Transmitter 0-4100 kg/h (0-10 kPa) 4-20 mA
238B DPX
TX
IS
IS
Field
230B
Gas Temp. -50 - 200 deg.C Pt100
PX
Gas Press. 0 - 150 kPa 4-20 mA
IS
ohm/I
PLC
Boiler Load From Master Loop (2)
LAG
Out
Out
PLC
In
In
In
Gas Flow From Gas Flow Control
Minimum FO Flow FO Flow (Based on Boiler Load) From FO Flow Control
SV **%
SW
Minimum Gas Flow *** kg/h
HMS PI
SUB
MUL
SV ***
SV 3% SV 0%
Burner Increase Seq. From BMS
SW
SW Gas Max. Flow From Total Fuel Flow
MUL
SV **%
MIN Gas Flow From Gas Flow Control
SV 0%
MUL
SV 0%
SV ***%
FO Manual
Designed at 30 deg.C
Gas Flow To Gas Flow Control
***kg/h
SV 0% Boiler Gas V/V Close From BMS
SW
PI
SW
Gas Ignition From BMS
All Gas Burner Stop
OR
HSE Gas Flow (Based on Boiler Load) To F.O Flow, Gas Flow, Air Flow Control (Set Point) & Total Fuel Flow
SW
MAN Gas C/V Position To Dump Control & IAS
A/M
EM-M
BGB
Field
Field AS
4 - 28
I/P
IAS
A/M
208B Gas Flow Control Valve
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 7) Atomising Press Control
8) Feed Water Control
Field PX
PLC
Field
242B
167B-1
166B Drum Water Level -300 - +300 mm 4-20 mA
Atomizing Press. 0-2 MPa 4-20 mA
Steam Flow 0-50kPa 0-70 t/hr 4-20 mA (Sqr. Root)
DPX
167B-2 DPX
30B
Steam Flow 0-50kPa 0-70 t/hr 4-20 mA (Sqr. Root)
DPX
Feed Water Flow 0-50kPa 0-70 t/hr 4-20 mA (Sqr. Root)
DPX
PLC
8bar
LAG
LAG
HSE
LAG
Out
SV 40%
LAG ASP 0.5MPa
Steam Flow To Air Flow (Set Point) & Steam Temp. Control
SW
Variable Mode Select (Small LDC Monitor on BCP)
SH STM Press. From Master Loop
FO Temp Bypass Mode
2.5 t/hr
SV 18%
SV 3.5%
LMS
LMS
ADD
OR
Auto Run From Master Loop
15bar
Burner Run From BMS
PI
PI
NOT
PI
MAN
Out
SV 25%
SFT
In Initial 50% 0 mm
MAN
In
AND
A/M
EM-M
BGB
Field AS
I/P
IAS
IAS
BGB
SP/PV
SP/PV
DWL SP
DWL SP
A/M
EM-M
BGB
A/M
Field
226B Atomising Press. Control Valve
BMS Logic
79B Hot Start Valve
4 - 29
AS
I/P
IAS
A/M
26B Feed Water Control Valve
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 9) Air Flow Control (Set Point)
10) Air Flow Control
Field
PLC
Gas Flow
Total BNR of Burning FO Flow
Base BNR Run
DIV
(Based on Boiler Load) From FO Flow Control
SW
3 BNR Run
SW
SW
Burner Draft Loss 0-5kPa 4-20 mA
DPX
PLC LAG 2 BNR Run
SW
LAG
3 BNR Run
SW
Burner Draft To Master Loop(2)
Air Flow SP From Air Flow Control (Set Point)
Out
SW
2 BNR Run
Base BNR Run
DIV
247B
O2 Meter 0-25% 4-20 mA
Total BNR of Burning
(Based on Boiler Load) From Gas Flow Control
Field
167B-2
O2
PI
In
ADD
ADD
ADD
ADD
ADD
SV ***
ADD
SV ***
MAX
Ignition Position From BMS
MUL SW
Steam Flow From FD W. Control
MUL
Correction for Number of Burner Running
O2 Trim Factor SV 100%
MUL
OR
HMS 3 BNR Run O2 Trim Select From Monitor
AND
Estimated O2 Contents PI
In
SW Initial 100%
ADD SV 105%
Out
Burner Inc./Dec. Seq. From BMS
SFT
In
MUL
Feed Forward
BNR Load
SV 70%
SV 103%
Purge Position From BMS
Out
Excess Air Ratio Factor Manual Adjuster Factor
LEAD
SV ***
MAX
Out
Boiler Load From Master Loop(S)
MUL
2 Burner Run From BMS
ASP
LLM SW
SV 100% HLM
Air Flow SP To Air Flow Control
In
SW
SW
MAN
3 Burner Run From BMS
IAS
EM-M
Control Signal From Other Boiler
BGB
RELAY
FO/Air Ratio Adjuster
Field
No.1 Boiler St-by Fan Mode
RELAY
A/M
No.1 Boiler St-by Fan Mode
BGB
IAS
A/M
Field
I/P
AS
AS
I/P
248B No.1 Boiler Air Flow Control Drive
248B St-by Fan Air Flow Control Drive
4 - 30
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA 11) Fuel Oil Discharge Press Control
12) Steam Temperature Control
Field
Field
200B PX
FO Pump Discharge Press. 0-4 MPa 4-20 mA
129B
129B
SH Steam Temp. 0-600 deg.C(CA)
SH Steam Temp. 0-600 deg.C(CA)
mV/I
mV/I
Adjusted Input Range 300-600 deg.C
PLC
Adjusted Input Range 300-600 deg.C
PLC HSE
LAG FO Press. From FO Flow Control
FO Press. From Other BLR LAG HSE
ASP
From Other PLC PI Output
PI
In PI
Steam Flow From FD W. Control
Out
Out
Initial 515 deg.C 85.8%
Slave PLC
Steam Flow From Total Fuel Flow
In
SV 0%
To Other PLC PI SP
SW
Out
From Other PLC PI SP
SV 10%
Slave PLC
SW
HSE
No.3 BNR Start From BMS
In
SV *** ADD ADD All Pumps Stop SW
MAN
Out
To Other PLC PI Output
MAN In
Output From Other BLR
Output From Other BLR
RELAY
Slave PLC
BGB
Field AS
IAS A/M
I/P
IAS
EM-M A/M
BGB
BGB
A/M
Field
215B FO Pump Discharge Press.
AS
4 - 31
I/P
IAS
A/M
130B SH Steam Temp. Control Valve
Part 4 Main Boiler Control System
Machinery Operating Manual
LNGC GRACE ACACIA
14) Total Fuel Flow
13) Purge Steam Press Control Field
Field
362B PX
Pargesteam Press. 0-1.5 MPa 4-20 mA
PLC
PLC LAG
FO Flow (Based on Boiler Load) From FO Flow Control
Gas Flow (Based on Boiler Load) From Gas Flow Control
FO Flow (Based on Boiler Load) To Other Boiler
5bar SV 33%
SV 33%
Gas Flow (Based on Boiler Load) From Other Boiler
SV 66% ADD
ADD
ADD
2 BNR Run
SW
SV 100%
3 BNR Run
Total Gas Flow To Dump Control
MAN
SUB
Total Fuel Flow To Master Loop(2) & Steam Temp. Control
Gas Max. Flow To Gas Flow Control
SUB
FO Max. Flow To FO Flow Control
SW
PI
EM-M A/M
BGB
IAS
A/M
Field
Field AS
I/P
399B Purge Steam Press. Control Valve
4 - 32
Part 4 Main Boiler Control System
LNGC GRACE ACACIA
Machinery Operating Manual
Part 5 : Main Turbine Remote Control System 5.1 Main Turbine Remote Control Specification ....................................5 - 2 5.2 Control Function ...............................................................................5 - 4 5.3 Transfter of Control Location ..........................................................5 - 4 5.4 Telegraph...........................................................................................5 - 8 5.5 Function and Interlock ......................................................................5 - 9 5.5.1 Program Control .........................................................................5 - 9 5.5.2 Auto Slow Down and Preventing Alarm.....................................5 - 9 5.5.3 Auto Spinning ...........................................................................5 - 10 Illustration 5.1a System Block Diagram....................................................................5 - 1 5.2a Main Turbine Remote Contorl Diagram..........................................5 - 3 5.4a Telegraph System Block Diagram ...................................................5 - 7 5.5.3a Auto Spinning ...........................................................................5 - 10
Part 5 Main Turbine Remote Control System Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 5.1a System Block Diagram (Control Loop)
PORT Wing
Signal Convertor
STBD Wing
Signal Convertor Electric Positioner Potentio Meter
D/O W/H Control Lever
Mimic Board
Solid State Switch
D/O
Governor Motor
Valve Position Transfer Potentio Meter
Friction Clutch
Hyd. Device
AHD Valve
D/I
Turbine
AHD AST Stop
To MicroComputer
AHD Valve Pos. Indicator
B A C A C B
Signal Computer
A/I
Micro Computer
Governor Motor
AST Valve
Hyd. Device
Friction Clutch
Potentio Meter RPM Signal
Potentio Meter
RPM Signal
No.1 Detector
Electric Positioner
No.2 Detector
D D B
AC Source ECR Control Lever
Proximity Shaft Rev. Stop Signal (Also Used for Auto Spinning) Signal Convertor
AHD AST Stop
Main Steam Press. Auto Slow Down
Signal Convertor
To MicroComputer
Detector
Pressure Transmitter
Fitted to Sproket of Main Turbine (Y) Signal (D) 10
AST Valve Pos. Indicator
(Y) Signal (A) 5
(mA) Signal (B) 20
4 AST
-2
AHD
Control Lever Output
-2
(mA) Signal (C) 20
AHD
100 (rpm)
100 (rpm)
AST
4 40 (mm)
Governor Lift
1 0
100 (%)
Valve Position
5-1
(Y) Signal (D) 6
-10
Propeller Revolution
0
60 kg/cm
Steam Pressure
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA Part 5 : Main Turbine Remote Control System 5.1 Main Turbine Remote Control Specification
Fitted in W/H. Lever type with four(4) cables. 3) Telegraph receiver (ECR & M/S) : two(2) set Fitted in ECR(Lever type with terminal) and on Emergency gauge board in M/S.
1. General The remote control system is provided automatic revolution control of the main propulsion turbine, and in general the controls are carried out with remote control levers and/or push buttons fitted on navigation console and engine control console, etc.
Fitted on ECR console.. 12) Wing control lever : two(2) sets. Fitted on STBD wing and PORT wing console. 13) Transformer for telegraph power : one(1) set
4) Telegraph repeater(Over Head Type) : one(1) set Fitted in W/H console. Fitted at W/H ceiling. 14) Proximity switch : one(1) set
The control system is of the electro hydraulic type, the control circuit and signal transmitters consist of electric and electronics equipment. The actuators such as nozzle valves and a manoeuvring valve consist of hydraulic servo equipment.
5) Telegraph logger : One(1) set For detecting Main shaft rotation. Fitted in W/H console 6) Sound speaker : One (1) set
The proposed remote control system is applied to MHI’s type MS turbine engine
7) Telegraph gong : one(1) set
2. Components The main turbine remote control system consists of the following.
Fitted in machine side 8) Electric positioner : two(2) sets
1) Turbine remote control panel : one(1) set (1) Computer system : DIASYS-Netmation :
Installed in ECR console.
two(2) sets
For AHD valve and AST valve with following components
(2) Power supply unit for computer : two (2) sets
(1) Governor motor : One (1) set
(3) Mimic unit : one(1) set
(2) Reduction gear : One (1) set
TFT colored touch panel computer display. This is attached on the surface of MTRCP(Main Turbine Remote Control Panel). System state surveillance, and a setting value check and change can be performed.
(3) Potention meter : One (1) set (4) Micro switch : Four (4) sets 9) Valve position transmitter : two(2) sets
(4) Control board : one(1) set For AHD valve and AST valve. (5) Safety board : one(1) set. (1) Potension meter : one(1) set State detection of the sensor for trip and state detection of trip bypass switch are performed. Trip signal will be outputted if it is required.
(2) Micro switch : four(4) sets 10) Emergency gauge Board : one(1) set
(6) Breaker unit : one(1) set Fitted in machine side (7) Power supply unit : one(1) set 11) Max. speed setter : one(1) set 2) Telegraph Transmitter with Cable(W/H) : one(1) set
5-2
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA Illustrator 5.2a Main Turbine Remote Control System Diagram
W/H Control Lever
CH01
Function Generator
FG1
A
V/Gov. Lift Potentio Meter
Function Generator
FG1
CH05
SV Generator
SV1 Gov. Lift
SV2
PV2
Potentio Meter
PI
MVH
Potentio Meter
PT
Electrical Positioning Controller
CH11 PI Controller
Solid State Realy ASR
FG2
MVS
CH16
TG
Potentio Meter
PV2 (Astern) (ASTERN)
V/RPM
Propeller
Astern Maneuvring Valve
GOV MTR
ASE
PV1
Turbine
Governor Motor
ASL
PI
CH15
GOV MTR
AHE
PV1
(AHEAD)
AS
Governor Motor
(Ahead)
CH04
FG2 V/Gov. Lift
Electrical Positioning Controller AHR
SV2 RPM
Solid State Realy
AHL
SV CH03 Generator
CH02 A
PI Controller
CH06
V/RPM ECR Control Lever
CH13
SV1
Ahead Nozzle Valve
PT
CH12
Tacho Generator CH07 CH08
Auto Power Reduction Over Speed Setter
CH09 CH10 Function Generator
SV Generator
FG1
SV1
V/Gov. Lift
Gov. Lift
Function Generator
FG1
AS
SV2
SV1
Electrical Positioning Controller
PI Controller
AHR AHL
SV Generator
PV2
PI
MVH
(Ahead)
SV2
V/RPM RPM
FG2 V/Gov. Lift
FG2
Electrical Positioning Controller
PI Controller
AS
AHE
PV1
Signal C
Signal B
Signal A
(mA) 20
ASR
(V)
ASL
PI PV2
MVS
PV1
ASE (Astern)
4 AST
0
AHD
-2
40 (mm)
100 AST
AHD
V/RPM
5-3
Part 5 Main Turbine Remote Control System
100
Machinery Operating Manual
LNGC GRACE ACACIA 5.2 Control Function 1. General
All control functions and interlock functions are performed by micro computer system, and these functions are connected with each other in the micro computer system.
(1) ○ : Lamp On ◎ : Lamp Flashing - : No operation (2) The buzzer an gong sounds while a lamp is flickering.
The main turbine is controlled to Ahead, Astern, Start and Stop according to the predetermined time schedule by operating the control lever which is fitted on the navigation console in W/H, and the engine control console in ECR, and the both WING control panel.
5.3 Transfer of Control location
In maneuvring zone of the turbine revolution, the remote control system is in revolution control(RPM control) mode which has PI(Proportional integral) control function with high speed response and high accuracy
2. Control
W/H ACK. P.B
-
-
O
-
-
O
REMOTE
ECR P.B ON
ECR
REMOTE
W/H
W/H
M/S M/S
ECR
The remote control system provides lever control mode and PB control mode. In case of the PB control mode, the governor motor is controlled directly by operating the PB control with watching the valve lift indicator and the revolution indicator. In case of the lever control mode, it provides revolution control function and valve position control function. In maneuvring zone, the system is controlled by the revolution control function with the valve position control function as minor control loop. In NAV.FULL zone, the system is controlled by only the valve position control function. The Illustrator 5.2a shows the system control diagram. The control lever consists of position meter which generates the set value(signal A)and limit switches which discriminate the direction of lever operation.
ECR
The feedback signals consist of governor lift signal(Signal B) and shaft revolution signal (Signal C). The governor lift signal is generated in electric positioner consists of potentio meter and micro switches.
Ind. Lamp
ECR Location P.B
M/S C.O.S Position
In NAV.FULL zone of the turbine revolution, the remote control system is in valve position control mode with program(Time schedule) control. After the main turbine stops, the main shaft automatically changes to auto spinning mode. If the control function by the control lever failed, the operator can control the valve position directly by PB control switch on the engine control console in ECR for back up facilities.
(3) Change the control location after the matching action of W/H and ECR control lever
1) Change over the control location Change of the control location is as follows.
Control Position M/S
ECR
Remark
W/H
M/S
M/S ◎
M/S
-
O
ECR
W/H P.B ON
-
O
REMOTE
-
ACK.ON
REMOTE
ECR P.B ON
REMOTE
-
ACK. ON
REMOTE
M/S P.B ON
-
O
-
-
O
REMOTE
M/S
O
◎
ECR
O
W/H
◎
ECR
O
ECR
◎
M/S
REMOTE The revolution signal of main shaft is generated for the revolution control function in maneuvring zone.
ECR
M/S
M/S
5-4
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA 2) When the W/H staff requires to take over the control and engine conditions are as follows.
3) When the bridge staff requires to be controlled by the ECR staff.
W/H staff orders by Telephone or interphone.
W/H staff orders by telephone or interphone
“A” The ECR staff recognizes the coincidence of lighting “A” and pointer “B” confirm matching lamp ”ON”.
The ECR staff recognizes the coincidence of lighting “A” and pointer “B” confirm matching lamp ”ON”.
The ECR staff transfers the control location from ECR to W/H.
The ECR staff transfers the control location from W/H to ECR “B” The propeller rpm can be directly Controlled by ECR telegraph lever.
The propeller rpm can not be controlled yet by W/H control lever.
“ECR” indicating lamp is lighting and “W/H control” indicating lamp is flickering and the buzzer and gong sound.
“W/H CONTROL” indicating lamp flickers and the buzzer and gong sound.
The W/H staff acknowledges and transfers the control location from ECR to W/H staff by pushing the control location acknowledge push button.
W/H staff acknowledges and transfers the control location from W/H to ECR staff by pushing the control location acknowledge push button.
“W/H CONTROL” indicating lamp is continuously lighting.
“ECR” indicating lamp is lighting and “W/H control” indicating lamp is off
Propeller rpm can be controlled directly by W/H control lever.
: Operation by the bridge staff.
: Operation by the bridge staff.
: Operation by the ECR staff.
: Operation by the ECR staff.
.
5-5
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA
Note Wing control to be available only when W/H is selected as the control location in the remote control system.
4) Wing Control Selection Change of mode the control position is as follows.
W/H
PORT WING
SELECTION
ACK.
PORT
PORT
ACK
ACK
CENTER IND. LAMP
◎ O
O X
STBD WING IND. LAMP
X
X
W/H PUSH BUTTON
PORT WING
SELECTION
CENTER
ACK
W/H
ACK.
CENTER
ACK
PORT WING ACKNOWDGE
PORT WING IND. LAMP
O
X O
X
X
◎
TIMER 2SEC
W/H LAMP FOR CONTROL LOCATION
W/H
CCR LAMP FOR CONTROL LOCATION
W/H
ECR LAMP FOR CONTROL LOCATION
W/H
M/S LAMP FOR CONTROL LOCATION
W/H
: STBD WING to be same as PORT WING.
5-6
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA Illustrator 5.4a Telegraph System Block Diagram
PORT WING BUZZER
CONTROL PANEL
WING STBD WING BUZZER
WHEEL HOUSE
TELEGRAPH TRANSMITTER WITH W/H
WING
(NAVIGATION CONSOLE)
SUB MAIN TELEGRAPH TELEGRAPH WITH LEVER F
TELEGRAPH RELAY UNIT
E
S
B
R
U
CLOCK
PUSH BUTTON
MICRO COMPUTER
W/H MTRP RELAY UNIT
TELEGRAPH LOGGER TELEGRAPH REPEATER
CONTROL PANEL
BUZZER
TELEGRAPH RECEIVER WITH ECR SUB MAIN TELEGRAPH TELEGRAPH WITH LEVER F
SOUND SPEAKER
E
S
B
R
ECR (ENGINE CONTROL ROOM)
U
MICRO COMPUTER
GONG STOP
TURBINE REMOTE CONTROL PANEL
TELEGRAPH RECEIVER
MACHINE SIDE
SUB MAIN TELEGRAPH TELEGRAPH WITH LEVER F
ELECTRIC GONG
E
S
B
R
U
ACK
5-7
MICRO COMPUTER
Part 5 Main Turbine Remote Control System
LNGC GRACE ACACIA 5.4 Telegraph
Machinery Operating Manual order. After matching the operation of each control lever, the indicators go steady.
1. Main telegraph In case of W/H control mode, the main engine is controlled by the control lever in the navigation console, and the telegraph order is indicated on the control lever on the ECR engine control console. When changing the telegraph order by operating the control lever on the W/H console. The gongs of the machine side and buzzers on the W/H and ECR sound for 2 seconds for attention. In case of ECR control mode, the telegraph order from W/H is indicated on the control lever on the ECR and the gongs sound until the control lever on the ECR coincides with the order from the W/H. Telegraph receivers are fitted on emergency gauge board at the machine side. The telegraph receiver indicates the telegraph order and provides reply function. 2. Sub telegraph The order of “FINSHED WITH ENGINE”, “STAND-BY”, “RUNG-UP” are send by operating push button switches “SUB TELEGRAPH” on the W/H and ECR console. When changing the order from the W/H, the indicator of each sub telegraph flickers and each buzzer and gong sound until the answer is given in ECR. For M/S, the indicator with the above three orders is provided. In order of “STAND-BY”, the buzzers and gong are stopped with the indicators still flickering by pressing push button “S/B GONG STOP” of ECR, and after finishing the actual plant stand-by operation, the reply pushing of “STANDBY” is done, then the indicators become steady and the buzzers and gongs sound for 2 seconds. 3. Telegraph logger The telegraph logger prints message of the telegraph order and replay with each event time and integral RPM in event stop order with shaft revolution below 5 RPM. 4. Telegraph order indicators in wheel house The telegraph order indicators are provided for indicating the telegraph order in the W/H ceiling. In case of W/H control mode, when changing the telegraph order, the indicators flicker for 2 seconds. In case of ECR control mode, when the telegraph order is changed from the W/H, the indicators flicker until the control lever of the ECR is operated to new
5-8
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA 5.5 Function and Interlock 5.5.1 Program Control The acceleration is controlled by the tie schedule function to limit thermal stress of turbine.. 1. AHD control
FULL OPEN
No.
Condition
Function No
Pre-warning alarm.
1
Main Steam Press. Low
1
O
2
Boiler Drum High Level.
2
O
3
Boiler Drum Low Level
2
O
4
Main Steam High Temp.
3
O
5
Main Condenser Low Vacuum.
3
O
6
S/T BRG High Temp.
3
O
7
Main Condenser Level High
3
O
8
One Boiler Trip
3
O
X
30 ~ 60 SEC
60 ~ 120 MIN
20 SEC
Z
Y
X
100%
*
100%
Y:SET POINT NO.83 (adjustable)
AHD
CLOSE
VALVE LIFT
Y
X:SET POINT NO.82 (adjustable)
VALVE LIFT
A
X
Drum level
A : about X rpm lift B : about Y rpm lift
*
2. Function No.2
1. Function No. 1
B
Note When main steam press goes down below Z point, pre-warning alarm is issued unit Y point. When main steam press goes down below Y point, ACT alarm is issued, but valve lift can be opened 100% Then, if main steam press goes down until X point, valve lift will become 0%
Z:SET POINT NO.81 (adjustable) HIGH LEVEL
X, Y is decided In accordance with turbine Performance
NORMAL
0%
STEAM PRESSURE
0
DRUM LEVEL
2. AST control
ACCELERATION ACCORDING TO THE PROGRAM SCHEDULE FUNCTION
FULL OPEN
PRE-WARNIG TIME : set point No.86 (Adjustable) set : 5sec Confirmation time (X) : set point No.87(Adjustable) set : 12sec D
C : about X rpm lift
100% AST 0~3.9
D : about Y rpm lift C
CLOSE
* 30 ~ 60 SEC
* 60 ~ 120 MIN
20 SEC
X, Y is decided In accordance with turbine Performance
STEAM PRESS
Decelerating time(Y) : set point No.88(Adjustable) set : 46sec 4.2~4.9
4.9~5.0
VALVE LIFT
LEVER POSITION
8.0
MPa
100% (VALVE LIFT)
MPa
Note Pre-warning and individual cause alarm at the above setting shall be initiated as follows. - 7 sec later from cause. - 5 sec prior to slow down starts. NORMAL
ABNORMAL
DRUM LEVEL
------ : The characteristic on “by-pass” notch of program control bypass switch on the W/H, ECR control * : Adjustable
Timer Count
7sec
5.2
5.5.2 Auto Slow Down and Prewarning Alarms 5sec During lever control, the function of automatic slow down operates to limit the operation range of the valve position to protect the plant as shown below. Cause signals are transmitted to IAS individually. Pre-warning alarm is indicated on operating panel of W/H and ECR, IAS
4.8
0% STEAM PRESSURE
ACCELERATION ACCORDING TO THE PROGRAM CONTROL FUNCTION
5-9
PRE-WARNING ALARM(5sec)and Individual alarm indicated (CH86) SLOW DOWN ACT
Confirm time(X)
Part 5 Main Turbine Remote Control System
Machinery Operating Manual
LNGC GRACE ACACIA
Illustration 5.5.3a Auto Spinning
3. Function No.3 In the event of the abnormal condition in the category of Function No.3 when the telegraph lever position or the valve position is in NAV. FULL zone, the AHD valve is limited lower of NAV. FULL zone position automatically, and this function is reset by operating the control lever under “AHEAD FULL UPPER” position.
L
TURNING GEAR NOT DISENGAGE
TIMER 3 MIN
X TIMER
AND
LEVER CONTROL
TIMER (15 SEC)
AND
(2 MIN)
AUTO SPINNING SIGNAL ON
CONTROL LEVER STOP POSITION
MAIN CONDENSER LOW VACUUM
(
ALARM
USED FOR GOVERNOR MOTOR INCHING RAISE DRIVE TIME AND PAUSE TIME TO BE SETTED
PROPELLER REV.
Time AHD VALVE
OR
AHD GOVE MTR LOWER SIGNAL ON
REPEAT SAME SEQUENCE MAIN SHUT STOPS (LESS THAN 1/10 RPM)
MAIN SHAFT STOPS (LESS THAN 1/10 RPM)
*1 : Pre-warning Time (Adjustable) *2 : Confirmation Time
AHD GOV MTR RAISE SIGNAL LOCK
MAIN SHAFT ROTATED (ABOUT 1/10 RPM)
TURBINE STEAM ON
ALARM
ALARM
XX
TIMER XX (1-3 SEC)
AHD NOZZLE VALVE OPEN LIMIT SW ON
AHD GOV MTR RAISE ON
XX
TIMER XX (3 MIN)
AND
AUTO SPINNING SW ON
Low vacuum condition
AHD VALVE OPEN CONDITION MORE THAN 30 SEC.
RPM CONTROL LOCK ALARM
For example
AUTO SPIN LAMP ON
SHAFT STOP ALARM
AST VALVE STOP
M/T RPM
MORE THAN 10 RPM
PROPELLER REV.
)
MORE THAN 10 RPM
INTERRUPTING SIGNAL
ALARM
XX
M/T RPM
XX
SPROKET RPM AHD VALVE SHUT
POSITION 100% AST GOV MTR. SOWER SIGNAL ON
MAIN SHAFT ROTATED (ABOUT 1/10 RPM)
OR
TURBINE STEAM ON
PROPELLER SPEED DOWN
FULL UPPER AST GOV MTR RAISE SIGNAL LOCK
TIMER XX ( 1-3 SEC )
AST MANEUV. VALVE OPEN LIMIT SW ON
TIMER
AST GOV MTR. RAISE SIGNAL ON
(2 MIN)
MAIN SHUT STOPS (LESS THAN 1/10 RPM)
XX
Time
Note *1 : After cause signal appears, the PRE-WARNING time before ACT can be set up with CH285(Initial setting is 5sec) *2 : After cause signal appears, the CONFIRMATION time to ACT can be set up with CH286~293 for each of cause signals. (Initial setting is 5sec) Above (1) ~ (3) functions are cancelled by changing the auto slowdown “bypass” switch on the navigation console in ECR and W/H.
ALARM
START TO OPEN AHD VALVE OPEN THE VALVE INTERMITTENTLY A H E A D A S T E R N
AST VALVE OPEN CONDITION MORE THAN 30 SEC. XX
XX : ADJUSTABLE
AHD VALVE OPENING DEGREE 3-4 RPM
15SEC 15SEC
SHUT THE AHD VALVE CONTINAUALLY
PROPELLER RPM 1/10 RPM
1/10 RPM
ABOUT 0 RPM
MAIN SHAFT ROTATION DETECTOR OPERATING POINT (1/10 RPM)
AUTO SPINNING SIGNAL ON
ABOUT 0 RPM
START TO OPEN AST VALVE
TIME
15 SEC PROPELLER RPM OPEN THE VALVE INTERMITTENTLY AST VALVE OPENING DEGREE
5.5.3 Auto Spinning
MAIN SHAFT ROTATION DETECTOR OPENING POINT (1/10 RPM)
3-4 RPM SHUT THE AST VALVE CONTINUALLY
The turbine rotor is automatically rotated to ahead or astern direction alternately after 20seconds of turbine stop to prevent the turbine rotor bending. The auto spinning function is effected in the following conditions. (1) “Auto spinning by-pass” switch is “NOR” notch. (2) On lever control mode. (3) the control lever is in stop position. (4) the main shaft is in stop condition.(0rpm) (5) Turning gear disengaged.
5 - 10
Part 5 Main Turbine Remote Control System
LNGC GRACE ACACIA
Machinery Operating Manual
Part 6 : Description of Critical Operation 6.1 Flooding in the Engine Room ........................................................... 6 - 1 6.2 Main Boiler Emergency Operation ................................................... 6 - 2 6.2.1 One-Boiler Operation ............................................................. 6 - 2 6.2.2 Operation of Stand by FDF..................................................... 6 - 4 6.2.3 Emergency Operationl ............................................................ 6 - 6 6.3 H.P. and L.P. Turbine Solo Running Operation................................. 6 - 8 6.4 Restore Engine Room Plant from Dead Ship Condition ................... 6 - 9 Illustrations 6.1a Floodable time, control position and method for valve operation ... 6 - 1 6.2.2a 6.2.2a Operation of Stand by FDF .............................................. 6 - 3 6.2.3a Boiler Emergency Operation Panel .............................................. 6 - 5 6.3a H.P. and L.P. Turbine Solo Running Operation ............................... 6 - 7
Part 6 Description of Critical Operation Part 6 Description of Critical Operation
LNGC GRACE ACACIA Part 6 : Description of Critical Operation
Machinery Operating Manual Illustration 6.1a Floodable time, control position and method for valve operation
6.1 Flooding in the Engine Room 1. General Procedure
Under normal circumstances, the engine room bilges are pumped to the bilge holding tank using the E/R bilge pump. The pump is started and stopped, and the suction valves opened and closed, by level switches in the port and starboard midship bilge wells. The bilge holding tank is pumped through the bilge water separator with the water being discharged overboard and any oil separated out by the bilge water separator being discharged to the oily bilge tank.
Is E/R bilge pump running ?
NO
YES
Start E/R bilge pump, taking suction from its bilge main and any of the associated bilge wells, and ensure that it is pumping. If it does not pump immediately, investigate in particular that no additional suction valves are open.
Is E/R bilge pump pumping ?
If, however, the level in the bilge well being pumped has not been lowered to the pump stop level after the pump has started, and after a preset (adjustable) time, an alarm is given on the central alarm system. NOTE Flooding in the engine room may be due to collision, running aground, corrosion of water pipes, broken rubber expansion bellows, etc. and the immediate action will depend upon the nature and severity of the flooding.
NO
YES
Check reason why E/R bilge pump is not pumping. Check the position of all valves, particularly that extra suction valves are not open.
LEVEL STILL RISING
The first priority in any case of flooding must be to control the rise in water level, either by controlling the inflow or pumping the water out. Pipework damage can be relatively easily controlled by isolating sections, whereas hull damage is not so easily checked. Isolating sections of pipework will of necessity involve shutting down items of plant served by that section of pipework. To help avoid this, a fibre rope wrapped around a sea water pipe is often effective in reducing the flow and also acts to reinforce the pipe.
LEVEL NOT RISING
LEVEL STILL RISING
The inflow of water is exeeding the capacity of the reciprocating bilge pump.
Summon assistance using the engineer's call bell.
LEVEL NOT RISING Find and isolate the source of ingress of water. Restrict the rate of entry by any means available, such as shoring, bandaging, caulking, if the source of water cannot be isolated by valves.
Find and isolate the source of ingress of water. Restrict the rate of entry by any means available, such as shoring, bandaging, caulking, if the source of water cannot be isolated by valves.
Start bilge pump, taking suction from the direct bilge suction & discharging directly overboard.
LEVEL STILL RISING Advise bridge. Stop the main engine and secure it aganist the ingress of water. Isolate equipment from the main switchboard before the equipment is flooded. Before the sea water pumps are flooded, it will be necessary to shut down the boilers, stop the turbine Generators, and start the emergency diesel. Secure the boilers against the ingress of water. Secure the main Feed pumps, turbine generators and diesel generator against the ingress of water
LEVEL NOT RISING Find and isolate the source of ingress of water. Restrict the rate of entry by any means available, such as shoring, bandaging, caulking, if the source of water cannot be isolated by valves.
Start No.1 Main Cool.S.W pump for Discharging from emergency bilge suction.
Advise Bridge for further action.
If the flow can be effectively reduced, use the large diameter bent welding rods with the flux removed. If the main circulating system is damaged and cannot be repaired in service, the main engine and turbine generators will have to be shut down and the boilers secured until repairs have been effected. If the sea water service system is damaged and cannot be repaired in service, all engine room services will have to be shut down and the emergency diesel generator started. If plastic steel or other proprietary compound is used to repair a section of pipe, follow the manufacturer’s instructions, and allow at least 24 hours after application for the compound to dry before pressurising the pipe.
6-1
Part 6 Description of Critical Operation
LNGC GRACE ACACIA
Machinery Operating Manual
6.2 Main Boiler Emergency Operation 6.2.1 One-Boiler Operation When it becomes necessary to run the ship with one boiler in operation due to an unexpected problem, operate the boiler paying attention to the following points. 1. Allowable Maximum Continuous Evaporation for One-boiler Operation Allowable maximum continuous evaporation is 68 ton/h. Whether the maximum continuous evaporation is reached or not should be judged by the burner oil pressure or ACC oil flow meter. At the maximum continuous evaporation, oil pressure 1.7 MPa and oil flow is about 5,021kg/h with three burners in use 2. Instructions for One-Boiler Operation at Maximum Evaporation 1) Pay attention to the condition of combustion and adjust air flow properly. The fan is operating near the maximum load, so take care that black smoke is not emitted during load changes. 2) Make boiler load changes as slowly as possible. 3) When cleaning burner tips, reduce boiler load beforehand. When only one burner is in service, the maximum evaporation of the boiler is 25 t/h, so reduce the boiler load below this before cleaning burner tips. If the boiler load is not reduced, steam pressure decreases. 4) Pay attention to steam temperature rise. Reduce the boiler load if steam temperature is 515°C or higher with STC control valve fully opened. 3. Instructions for Boiler out of Operation 1) Completely isolate the boiler out of operation from the boiler in operation. Particularly when making repairs, check main steam stop valve, feed water valve, ACC steam pressure detecting root valve, auxiliary steam desuperheated steam outlet valve, drain valve, chemical dosing valve and other lines which are connected to the other boiler. 2) When the boiler is shut down for a long time, it should be preserved by the wet lay-up method.
6-2
Part 6 Description of Critical Operation
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 6.2.2a Operation of Stand by FDF
No.3 Feed Draft Fan
No.1 Feed Draft Fan
No.2 Main Boiler
Economizer
S.A.H
S.A.H
Economizer
No.2 Feed Draft Fan
No.1 Main Boiler
6-3
Part 6 Description of Critical Operation
LNGC GRACE ACACIA 6.2.2 Operation of Stand by FDF 1. Introduction When a fan cannot be used for some reason, it is necessary to fire two boilers with stand-by fan. If one of the fans fails for some reason, the boiler on the same ship side is shut down by the fuel oil emergency shut-off equipment. On the other hand, the boiler in normal operation receives ACC signals to take over the load of the boiler which was shut down, so if the fan failure alarm sounds, the load on the main engine should be reduced immediately. If standby fan operation is found necessary as the result of an investigation of the cause, operation should be made in accordance with the following procedure. 1) Close the outlet damper of the fan which failed. 2) Open the common duct damper of failed boiler side. Operate stand-by F.D. fan. The fuel oil emergency shut-off valve for the shut-down boiler is now ready to open.
Machinery Operating Manual NOTE 1. The fan is operated near the maximum capacity and air pressure s low, so draft loss is liable to occur. So increase the frequency of soot blowing for the main boiler and economizer to 3~4 times a day. 2. The steam outlet valve of the shut-down valve of the shut-down boiler need not be operated at all. 3. Cleaning of burner tip. Change the burner to gas burner for each b o i l e r a n d c l e a n i t . S h u t d o w n o n e b u r n er a t a t i m e simultaneously for each boiler and after cleaning, light off one burner at a time simultaneously for each boiler. Note that if the number of burners in use is different between two boilers, air distribution becomes uneven, causing problems in air flow adjustment.
3) Select stand-by fan mode. 4) Switch ACC from auto to manual. Fuel oil auto/manual switch and fan auto/manual switch should be put in manual mode for both No.1 and No.2 boilers. 5) Perform furnace purge of the shut-down boiler. Open the air slide of the base burner, put the burner wind box air pressure at about 20 mmAq and purge for at least 5 minutes. Pay attention to air flow adjustment so that the boiler in normal operation is not shout of air. 6) Fully open the boiler starting valve. 7) Open the fuel oil emergency shut-off valve. 8) Light off the boiler which is shut down. After lighting off, adjust oil pressure to about 0.4MPa and raise steam pressure at the same combustion rate until the pressure reaches the same pressure as the other boiler. Take care so that pressure raising rate is not higher than the pressure raising curve. 9) Start two-boiler operation. When the pressure of the boiler has reached the same pressure as the other boiler, start two-boiler operation and close the superheater starting valve. 10) Put the fuel auto/manual switch in auto position for both boilers. Switching should be made after boiler load has become steady. 11) Increase the main engine load gradually.
6-4
Part 6 Description of Critical Operation
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 6.2.3a Boiler Emergency Operation Panel
NO.2 BOILER 34B
EMERGENCY OPERATION
43B
NO.2 BURNER
36B
PURGE FINISH
ABC EMERG CONTROL NO.R
OFF
38B BMS EMERG CONTROL
F O SHUT V/V
PURGE
CLOSE
BURN
37B
OPEN
NO.3 BURNER
IGNITER ON
OFF
IGNITER ON
OFF
ON
44B
41B
47B
F O V/V
F O V/V
F O V/V
CLOSE
39B
46B
BASE BURNER
IGNITER
EMERG
NO.R
40B
OPEN
CLOSE
45B
OPEN
CLOSE
42B
OPEN
48B
NO.1 BOILER 34A
EMERGENCY OPERATION
46A
NO.3 BURNER
40A
BASE BURNER
43A
NO.2 BURNER 36A
IGNITER OFF
IGNITER ON
47A
48A
ON
OFF
ON
41A
F O V/V CLOSE
OFF
OPEN
ABC EMERG CONTROL NO.R
EMERG
38A
44A
F O V/V CLOSE
PURGE FINISH
IGNITER
OPEN
F O V/V CLOSE
42A
45A
6-5
OPEN
F O SHUT V/V CLOSE
39A
OPEN
BMS EMERG CONTROL
PURGE NO.R
BURN
37A
Part 6 Description of Critical Operation
LNGC GRACE ACACIA 6.2.3 Emergency Operation 1. Loss of Water
Machinery Operating Manual the boiler to cool off slowly. 4. Failure of Forced Draft
1) In case the water level falls below the visible range of the water gauge due to failure of the feed water supply or neglect of the operator, close the fuel supply valves of the burners-immediately.
1) Stop the fuel supply to the burners immediately.
2) When the feed water is nor operating for a long time, close the feed stop valves and the main and auxiliary steam valves. Secure the burners and forced draft fan. Open the starting valve and gradually reduce the steam pressure.
3) Light up the burners one at a time, using a igniter. Do not attempt to keep burners in service until the fan is being restarted as the economiser and air preheater will be badly fouled with soot in a short time and may result in a soot fire in them which can cause considerable damage.
2) Restart the fan and purge furnace of gases. Close all burner air registers.
3) Do not attempt to add water until the boiler is cooled down sufficiently so that there is no likelihood of damage due to water coming in contact with overheated pressure parts. 2. Loss of Fire 1) Close burner valves immediately. 2)
Reduce the burner air pressure.
3) Before relighting any burner, allow the furnace to clear of combustion gases from any unburned oil. 4) Use a igniter to relight the burners. Do not attempt to light up from hot brickwork. 3. Tube Failure 1) Shut off the fuel supply to the burners immediately. If the tube failure has resulted from low water in the boiler, close the feed stop valve & the main and auxiliary steam stop valves. No water should be fed to the boiler. 2) If the tube failure was not caused by low water, maintain the water in the boiler at normal level is possible until the boiler has been cooled. Secure the main and the auxiliary steam valves. Open the starting valve of superheater outlet. 3) In either case keep the forced draft fan running and adjust the damper to maintain sufficient air flow to carry the escaping steam out through the stack. 4) Do not blow down the boiler unless the casualty is such that it might endanger the fire room personal. 5)
After the pressure has decreased and the fires are cut, stop the boilers and close all possible sources of air flow into the boiler furnace. Allow
6-6
Part 6 Description of Critical Operation
Machinery Operating Manual
LNGC GRACE ACACIA Illustration 6.3a HP and LP Turbine Solo Running Operation
TO OPERATATE L.P TURBINE ALONE
TO OPERATATE H.P TURBINE ALONE
Diffuser Blind Flange Emergency Exhaust Pipe
Crossunder Expansion Pipe Joint
Orifice
Emergency Steam Pipe
Stop valve Fixing device Bracket
Blind Flange
L.P TURBINE
L.P TURBINE
H.P TURBINE
H.P TURBINE
Installation of Emergency Steam Pipe (To Operate LP Turbine Alone)
Procedure for Fitting Emergency Exhaust Pipe (To Operate HP Turbine Alone)
1.Remove crossunder pipe and expansion joint. 2.Disconnet ahead stop valve leak-off steam pipes and then remove press. gauge pipe and ahead stop valve 3.Install stop vlave fixing device on ahead nozzle control valve steam inlet flange. 4.Install blind flange on HP turbine exhaust mouth. 5.Install braket on the top of HP turbine exhaust chamber 6.Install ahead stop valve in altered direction as indicated on the drawing. then connect the leak-off steam connection pipes and press. gause pipe 7.Install emergency steam pipe, ofifice and diffuser in positon as shown on drawing.
1.Remove crossunder pipe and expansion joint. 2.Install blind flange on LP turbine steam inlet. 3.Remove blind flange on emergency exhaust inlet. 4.Install emergency exhaust pipe, orifice and expansion joint in position as shown on the drawing.
6-7
Part 6 Description of Critical Operation
LNGC GRACE ACACIA
Machinery Operating Manual
6.3 H.P. and L.P. Turbine Solo Running Operation (Emergency Operation)
2) Disconnect and remove the pipings for warming-up system fitted around H.P. turbine and insert blank flanges
1. General
3) Install the emergency steam pipe between H.P. turbine chest and L.P. turbine. In this propulsion unit, the ahead stop valve, which is normally installed at the H.P. turbine, has also function as blank flange to block steam flowing into H.P. turbine. As illustration 6.3a. To Operate LP Turbine Alone
if either the high pressure or low pressure turbine becomes inoperative for some reason, the other turbine can be kept running after disconnecting the unavailable turbine and exchanging the inlet or cross-over piping to emergency piping. In emergency operation, special attention must be given to the emergency piping. 2. HP Turbine Solo Operation
4) The Insert blank flanges at the proper flanged connections in the packing steam and leak-off steam piping to the H.P. turbine so that steam supply can be blocked.
1) If the LP turbine becomes inoperative, disconnect the coupling between the turbine and the first pinion by removing the reamer bolts from sleeve of LP turbine flexible coupling
5) Operate the ahead turbine by means of the ahead stop valve and operate the astern turbine by manipulating the astern maneuvring valve ant the engine side.
2) Install the emergency operating pipe between HP turbine and LP turbine. (Main condenser) as illustration 6.3a To Operate HP Turbine Alone
6) L.P. turbine solo operation is to be limited to protect the reduction gear teeth from overloading.(Equivalent power and rpm to 70% MCR revolution at ahead operation)
3) The astern guard valve will be closed manually. CAUTION The astern turbine can not be used. 4) The ahead stop valves will be opened manually and the turbine operation will be carried out by manipulating the ahead nozzle valve. 5) To operate only the HP turbine, use desuperheated steam as main steam. 6) During the HP turbine solo operation, turn the LP turbine 180° once every six hours via the flexible-coupling flange to prevent the deflection of the LP turbine rotor. 7) During the HP turbine solo operation. Use the water spray in the L.P. turbine exhaust chamber to prevent the overheat of exhaust casing.
CAUTION The chest pressure of the L.P. turbine should not exceed 0.3MPa CAUTION All piping units for turbine warming-up system installed at HP turbine should be removed and proper blind flanges should be inserted in the emergency operation(For LP turbine solo operation only) 4. Manual Operation (In Case of Emergency) If the control mechanism of the ahead nozzle control valves and astern maneuvring valve becomes inoperative for reason such as lack of control oil pressure, these valves should be operated by means of emergency handwheels.
8) H.P. turbine solo operation is to be limited to protect the reduction gear teeth from overloading. The H.P. turbine output is limited by the amount of desuperheated steam available. 9) Keep the H.P. turbine exhaust chamber pressure below the normal operating pressure level. 3. L.P. Turbine Solo Operation 1) If the H.P. turbine become inoperative, disconnect the coupling between H.P. turbine and the first pinion by removing the reamer bolts from the sleeve of turbine flexible coupling.
6-8
Part 6 Description of Critical Operation
Machinery Operating Manual
LNGC GRACE ACACIA 6.4 Restore Engine Room Plant from Dead Ship Condition
Dead DeadShip ShipCondition Condition
Shore ShoreSupply SupplyAvailable Available Establish Establishshore shoresupply. supply.
Start Startthe theemergency emergencygenerator, generator,and andsupply supply emergency emergencyand andmain mainswitchboards switchboardsthrough throughthe the respective respectivebreakers. breakers.
Fill FillThe Thecondensate condensatesystem system feed feedwater waterdrains drainstank, tank, deaerator, deaerator,LP LPfeed feedheater heaterand andgland glandcondenser. condenser.
Start StartFO FOservice servicepump pumpwith withaaburner burnerin inaaboiler, boiler, Supply Supplydiesel dieseloil oilto tothe theburner burnerwith withatomising atomisingair. air.
Supply Supplymain mainand andemergency emergencylighting lightingthroughout throughoutthe the vessel. vessel.
Start Startboiler boilerforced forceddraft draftfan. fan. With Withall allrequired requiredvents ventsand anddrains drainsopen, open,commence commence to toflash flashthe theboiler. boiler. Ensure Ensurethat thatthe thefurnace furnaceisisadequately adequatelypurged purgedprior prior to toignition. ignition.
Put Putthe thefire firedetection detectionsystem systeminto intooperation. operation.
(Note (NoteThe Theboiler boilershould shouldbe beflashed flashedup upmanually manually from fromthe thelocal localstation.) station.) IfIfthe theboiler boilerhas hasbeen beenshut shutdown downfor for aalong longperiod, period, allow allowfor forlow lowfuel fuelpressure pressureto toenable enableheat heatand andboiler boiler pressure pressureto torise riseslowly. slowly. Start Startengine engineroom roomfans. fans.
Put Put the the instrument instrument air air system system into into operation operation Put Putthe thegeneral generalservice serviceair airsystem systeminto intooperation. operation. Put Putthe theDG DGstarting startingair airsystem systeminto intooperation. operation. ..
Open Openboiler boilerstop stopvalves valvesto: to: The Thesuperheated superheatedsteam steamsystem. system. The Thedesuperheated desuperheatedsteam steamsystem. system. The Theexhaust exhauststeam steamsystem. system. The TheLP LPheating heatingsteam steamsystem system Start-up Start-upvalve valve Ensure Ensureall allsteam steamline linedrains drainsare areopen. open. Open Openthe thevalves valvesto tothe theheating heatingcoils coilsof ofone oneFO FO settling settlingtank, tank,placing placingthe thecoil coildrains drainsto tothe the contaminated contaminateddrains drainssystem. system.
Put Putthe thefresh freshwater watercooling coolingsystem systeminto intooperation. operation. DO DOsupply supply Start StartPre. Pre.LO LOpump. pump.
Start Start up up the the main main diesel diesel generator generator and and shift shift electric electric load load to to the the main main diesel diesel generator generator and and stop stop emergency emergency generator. generator.
Shut Shutdrum drumvent ventwhen whensteam steamissues issuesfrom fromit, it,at at approximately approximately0.2MPa. 0.2MPa. Close Closesuperheater superheater and anddesuperheater desuperheaterdrain drainvalves valves except exceptsuperheater superheater outlet outletvalve valveand andopen openmain mainstop stop valve valveat atapproximately approximately0.25MPa. 0.25MPa.
Put Putthe thesea seawater water service servicesystem systeminto intooperation. operation.
Fill Fillaaboiler boilerto to100 100mm mmabove abovegauge gaugebottom, bottom,using using the thedrain drainpumps pumps(or (ordirect directdrop dropfrom fromdeaerator). deaerator).
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6-9
Part 6 Description of Critical Operation
Machinery Operating Manual
LNGC GRACE ACACIA
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By Bymanual manualoperation operationof ofthe theburner burner registers, registers,place place the theNo.1 No.1unit unitin inuse. use. When Whenthe thefuel fueltemperature temperatureisisapproximately approximately90˚C 90˚C open settling tank outlet valve open settling tank outlet valveand andclose closethe thediesel diesel oil oilsupply. supply. Allow Allowthe theNo.1 No.1burner burner to tooperate, operate, and andcontinue continueto to raise raisethe thesteam steampressure pressurein inthe theboiler, boiler,on onheavy heavyfuel fuel oil. oil.
With Withthe theboiler boilersuperheater superheaterbeing beingcirculated, circulated,as as steam steambeing beingsupplied suppliedto tothe the feed feedpump pumpand andturbine turbine generator, generator,all allthe the boiler boilerdrains drainsand andvents ventscan cannow now be closed. be closed. Continue Continueto toraise raisesteam steampressure, pressure,with withfuel fuelcontrol control on onmanual. manual. Check Checkeach eachsystem system now now in inuse, use,and andgradually gradually change changeover over all allcontrol controlsystems systemsto toautomatic automaticand/or and/or remote. remote. Ensure Ensuresystems systemsand andcomponents componentsthat thathave havebeen been used usedare areplaced placedback backon onstand-by stand-bycondition conditionor or isolated isolatede.g. e.g.emergency emergencyfeed feedpump, pump,emergency emergency diesel dieselgenerator generatoretc. etc.
As Asthe thesteam steampressure pressurerises, rises,use usethe theemergency emergency feed feedpump pumpto to maintain maintainthe theboiler boilerwater waterlevel. level. With Withboiler boilernow nowbeing beingfired firedon on heavy heavyfuel fueloil, oil,the the fuel pressure will require adjusting to maintain fuel pressure will require adjusting to maintain pressure pressurerise. rise.
At Ataaboiler boilerpressure pressureof of6.0MPa, 6.0MPa, close closethe theboiler boiler start-up valve and ensure the boiler ACC start-up valve and ensure the boiler ACCsteam steam flow/pressure flow/pressure valves valves are areopen, open, and andchange changeover over the the boiler boilermaster/fuel master/fueland andair aircontrollers controllersto toautomatic. automatic.
Start Startauxiliary auxiliarysea seawater watercirculating circulatingpump pumpto tosupply supply atmospheric atmosphericcondenser. condenser.When Whenboiler boilerat at approximately approximately1.8MPa 1.8MPa pressure, pressure,ensure ensurethe thedrains drains pump system is operating to the deaerator. pump system is operating to the deaerator. Put Putone onemain mainfeed feedpump pumpinto intooperation operation to tomaintain maintain the theboiler boilerlevel. level. The Theturbine turbineexhaust exhaustwill willbe beto tothe thedeaerator, deaerator,steam steam air airheater heaterand andHP HPdump dumpto toatmospheric atmosphericcondenser. condenser.
The Theboiler boilershould shouldnow nowbe be providing providingnormal normalsteam steam pressure to turbo generator/main feed pressure to turbo generator/main feedpump/and pump/and fuel fueloil oilheating heatingetc. etc.
Start Start up upall allremaining remainingauxiliaries-refrigeration auxiliaries-refrigeration units/air units/aircondition conditionunits/not units/notin inuse usefans/galley fans/galleyand and accommodation accommodationsupplies suppliesetc. etc.
(Note (Note!!IfIf the the vessel vesselisisin indry drydock, dock,or or alongside alongsideaa shore installation, electric power maybe shore installation, electric power maybesupplied supplied through through the the shore shorebreaker.) breaker.) However, However, this thisisisnormally normallyused usedfor fordry drydock dock purposes when separate arrangements purposes when separate arrangementsare aremade made for cooling water supplies to air for cooling water supplies to air compressors/refrigeration compressors/refrigerationand andair airconditioning conditioningunits. units.
At At2.0MPa, 2.0MPa,start startwarming warmingof ofmain mainturbine turbinegenerator. generator. At Atapproximately approximately5.0MPa, 5.0MPa,start start up up on onmain mainturbo turbo generator. generator. The Theelectrical electricalload loadfor fordiesel dieselgenerator generatorshifts shiftsto to main turbo generator. main turbo generator. Shut Shut down downthe the diesel dieselgenerator generator and and place placeon on standby. standby.
Vessel Vesselin inLive LiveCondition Condition
6 - 10
Part 6 Description of Critical Operation
LNGC GRACE ACACIA
Machinery Operating Manual
Part 7 : Steam Plant Heat Balance System 7.1 100% MCR FO Burning Condition................................................. 7 - 1 7.2 100% MCR DUAL Burning Condition........................................... 7 - 2 7.3 100% MCR BOIL OFF GAS Burning Condition ........................... 7 - 3 7.4 90% MCR FO Burning Condition (Guarantee Condition).............. 7 - 4 7.5 90% MCR FO Burning Condition .................................................. 7 - 5 7.6 90% MCR DUAL Burning Condition............................................. 7 - 6 7.7 90% MCR BOIL OFF GAS Burning Condition ............................. 7 - 7 7.8 50% MCR FO Burning Condition .................................................. 7 - 8 7.9 30% MCR FO Burning Condition .................................................. 7 - 9 7.10 Cargo Unloading Condition (FO)................................................ 7 - 10 7.11 Cargo Loading Condition (FO) ................................................... 7 - 11 7.12 Hotel Load Condition (FO) ......................................................... 7 - 12
Part 7 Steam Plant Heat Balance System Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA Part 7 : Steam Plant Heat Balance System 7.1 100% MCR FO Burning Condition
Q0
Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 116830
Q 105261
P 62.5 T 515
E 823.6 P 61 T 510
Q 555
L.P Turbine
Q 92935
Main Pump
720 mmHg Vacuum
Q 81670
Q 88074
Main Condenser
E 545.3
T 33.6
P 1.49 E 639.2
Q 11265
P 7.08 E 701.9
Q 3030
Q 1446 E 649.1
3.1/722 mmHg
Exhaust
Q 4457
Vent Q 88074
T 49.8
Q0
E 138.7
T 76
Q 3603
Q 3030
Q 3604
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 100% MCR (F.O Burning) Main Turbine Shaft Horse Power - 40,000 SHP(PS) 88 rpm Normal Fuel Rate - 211.2 G/PS H, 8,448 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 117430
E 129
T 52.1
T 102.5
E 138.7
E 668.5
Q0
Q 12642
T 70
Q 406
No.1 Distilled Plant
Q 50
Q 2689 E 749.9
Inspection Tank
Q0
Q0
Q 50
Q 3604
E 823.6 P 61 T 510
E 732.1 Q 4063 E 732.1 P 2.8
E 724.2
Q 4115
No.2 Distilled Plant
7.08/2.8
Q 1446
E 701.9
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 4457
Q 117430
Q 8061
Deoiler
62.5/11
Q0
Q 3095
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 581.9
E 823.6 P 61 T 510
62.5/4.2
Q0
11/7
Low Duty Heater
Q 6444
Q0 Q0
E 791 Q 6354
Q 5509
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
Q 9507
Q 8061
Q 102
Calorifier
E 740
17.6/11.5
Q 130
Q 100
P 17.6 E 749.9
L.O. Purifier Heater
Q 2689
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 600
62.5/11
Q 600
M
Steam to Burners
Main Boiler
Q 1010
Soot Blowers
M/T Nonextra Steam Rate : 2.35
kg/PS.H
Boiler Efficiency
: 88.5
%
Turbo Generator Load
: 1,593
kW
Evaporator Load
: 60
Ton/Day
Q 2689
Sea Water Temperature
: 27
℃
E 749.9
Air Temperature
: 38
℃
: 10,280
kcal/kg
Make-up
Q 1610
Q 15672
Key
F.O High Heat Value
T 35
T 87.2
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling)
: In Use
Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2993 T 70
Drain Tank
Q 322 T 90
Q 102.0
Q 20699
T 100.1
T 77.5
7-1
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.2 100% MCR DUAL Burning Condition Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 118997
Q 106182
P 62.5 T 515
E 823.6 P 61 T 510
Q 270
L.P Turbine
Q 92617
Main Pump
720 mmHg Vacuum
Q 81254
Q 88842
Main Condenser
E 545.3
T 33.6
P 1.49 E 639.2
Q 11363
P 7.08 E 701.9
Q 3030
Q 1496 E 649.1
3.1/722 mmHg
Exhaust
Q 4477
Vent Q 88842
T 49.7
Q0
E 138.7
T 76
Q 3665
Q 3030
Q 3665
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 100% MCR (Dual Burning) Main Turbine Shaft Horse Power - 40,000 SHP(PS) 88 rpm Normal Fuel Rate - F.O : 3,791.1 kg/h, F.G : 3,896.9 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 119417
E 129
T 52.0
T 102.5
E 138.7
E 668.5
Q0
Q 12760
T 70
Q 573
No.1 Distilled Plant
Q 50
Q 3797 E 749.9
Inspection Tank
Q0
Q0
Q 50
Q 3665
E 823.6 P 61 T 510
E 731.9 Q 4113 E 731.9 P 2.8
E 723.9
Q 4165
No.2 Distilled Plant
7.08/2.8
Q 1496
E 701.9
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 4477
Q 119417
Q 8142
Deoiler
62.5/11
Q0
Q 4370
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 584
E 823.6 P 61 T 510
62.5/4.2
Q 1560
11/7
Low Duty Heater
Q 7628
Q0 Q0
E 791 Q 7538
Q 5609
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
Q 9638
Q 8142
Q 102
Calorifier
E 740
17.6/11.5
Q 130
Q 100
P 17.6 E 749.9
L.O. Purifier Heater
Q 3797
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 420
62.5/11
Q 420
M
Steam to Burners
Main Boiler
Q 1022
Soot Blowers
M/T Nonextra Steam Rate : 2.35
kg/PS.H
Boiler Efficiency
: 86.2
%
Turbo Generator Load
: 1,891
kW
Evaporator Load
: 60
Ton/Day
Q 3797
Sea Water Temperature
: 27
℃
E 749.9
Air Temperature
: 38
℃
: 13,280/10,280 kcal/kg : In Use
Make-up
Q 1442
Q 15790
Key
F.G/F.O High Heat Value
T 35
T 87.3
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: 0.15
%/Day
Drain Line
S.G. of Cargo
: 470
kg/m3
Q 2708 T 70
Drain Tank
Q 322 T 90
Q 1662
Q 21924
T 90.7
T 78.5
7-2
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.3 100% MCR BOIL OFF GAS Burning Condition Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 121172
Q 107880
P 62.5 T 515
E 823.6 P 61 T 510
Q0
L.P Turbine
Q 91950
Main Pump
720 mmHg Vacuum
Q 80617
Q 88617
Main Condenser
E 545.3
T 33.6
P 1.49 E 639.2
Q 11333
P 7.08 E 701.9
Q 3030
Q 1593 E 649.1
3.1/722 mmHg
Exhaust
Q 4498
Vent Q 88617
T 49.7
Q0
E 138.7
T 76
Q 3728
Q 3030
Q 3728
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 100% MCR (B.O.G Burning) Main Turbine Shaft Horse Power - 40,000 SHP(PS) 88 rpm Normal Fuel Rate - 179.5 G/PS H, 7,180 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 121472
E 129
T 52.0
T 102.5
E 138.7
E 668.5
Q0
Q 12751
T 70
Q 903
No.1 Distilled Plant
Q 50
Q 5981 E 749.9
Inspection Tank
Q0
Q0
Q 50
Q 3728
E 823.6 P 61 T 510
E 731.7 Q 4165 E 731.7 P 2.8
E 723.5
Q 4217
No.2 Distilled Plant
7.08/2.8
Q 1593
E 701.9
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 4498
Q 121472
Q 8226
Deoiler
62.5/11
Q0
Q 6884
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 585
E 823.6 P 61 T 510
62.5/4.2
Q 1560
11/7
Low Duty Heater
Q 8040
Q 2784 Q0
E 791 Q 7950
Q 5758
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
Q 9819
Q 8226
Q 102
Calorifier
E 740
17.6/11.5
Q 130
Q 100
P 17.6 E 749.9
L.O. Purifier Heater
Q 5981
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 300
62.5/11
M
Steam to Burners
Q 300
Main Boiler
Q 1035
Soot Blowers
M/T Nonextra Steam Rate : 2.35
kg/PS.H
Boiler Efficiency
: 83.9
%
Turbo Generator Load
: 1,991
kW
Evaporator Load
: 60
Ton/Day
Q 5981
Sea Water Temperature
: 27
℃
E 749.9
Air Temperature
: 38
℃
: 13,280
kcal/kg
: In Use
Make-up
Q 1335
Q 15781
Key
F.G High Heat Value
T 35
T 87.3
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: 0.15
%/Day
Drain Line
S.G. of Cargo
: 470
kg/m3
Q 2438 T 70
Drain Tank
Q 322 T 90
Q 4446
Q 24322
T 90.3
T 79.6
7-3
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.4 90% MCR FO Burning Condition (Guarantee Condition) Q0 Q0
F.O. Tank Heating
Q 340
H.P Turbine
Q 102448
Q 92938
P 62.5 T 515
E 823.6 P 61 T 510
Q 485
L.P Turbine
Q 83259
Main Pump
720 mmHg Vacuum
Q 73560
Q 78343
Main Condenser
E 544
T 32.6
P 1.32 E 635.9
Q 9699
P 6.23 E 697
Q 3030
Q 1509 E 648.6
3.1/722 mmHg
Exhaust
Q 3948
Vent
E 744.1
Q 78343
T 50.8
E 138.7
T 76
Q0
Q 3030
Q 3191
T 90
Q 3191
3rd Stage Feed Water Heater
Q 10567
P 2.5 E 127.3
E 129.0
Ship Condition - 90% MCR (F.O Burning), Guarantee Condicion Main Turbine Shaft Horse Power - 36,000 SHP(PS) 85 rpm Normal Fuel Rate - 210 G/PS H, 7,560 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 103058
E 129
T 53.4
T 99
E 138.7
E 668.5
Q0
Q 126
No.1 Distilled Plant
Q 50
Q 901
T 70
Inspection Tank
Q0
Q0
Q 50
Q 3191
E 823.6 P 61 T 510
E 733.4 Q 3716 E 733.4 P 2.8
E 722.9
E 697
Q 3768
No.2 Distilled Plant
6.23/2.8
Q 1509
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 3948
Q 103058
Q 7139
Deoiler
62.5/11
Q0
Q 1027
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 585.7
E 823.6 P 61 T 510
62.5/4.2
Q0
11.5/7
Low Duty Heater
Q 4823
Q0 Q0
E 791 Q 4733
Q 5225
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
Q 8648
Q 7139
Q 102
Calorifier
E 740
15.5/11.5
Q 130
Q 100
P 15.5 E 744.1
L.O. Purifier Heater
Q 901
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 610
62.5/11
Q 610
M
Steam to Burners
Main Boiler
Q 919
Soot Blowers
M/T Nonextra Steam Rate : 2.34
kg/PS.H
Boiler Efficiency
: 88.5
%
Turbo Generator Load
: 1,150
kW
Evaporator Load
: 60
Ton/Day
Q 901
Sea Water Temperature
: 27
℃
E 744.1
Air Temperature
: 38
℃
: 10,280
kcal/kg
: No Use
Make-up
Q 1529
Q 13597
Key
F.O High Heat Value
T 35
T 86.9
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 925 T 70
Drain Tank
Q 322 T 90
Q 102.0
Q 16475
T 100.1
T 77.6
7-4
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.5 90% MCR FO Burning Condition Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 105341
Q 94431
P 62.5 T 515
E 823.6 P 61 T 510
Q 500
L.P Turbine
Q 82609
Main Pump
720 mmHg Vacuum
Q 72838
Q 78936
Main Condenser
E 544
T 32.6
P 1.32 E 635.9
Q 9771
P 6.23 E 697
Q 3030
Q 1695 E 649.1
3.1/722 mmHg
Exhaust
Q 4051
Vent Q 78936
T 50.7
Q0
E 138.7
T 76
Q 3280
Q 3030
Q 3280
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 90% MCR (F.O Burning) Main Turbine Shaft Horse Power - 36,000 SHP(PS) 85 rpm Normal Fuel Rate - 211.7 G/PS H, 7,621.2 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 105951
E 129
T 53.3
T 99
E 138.7
E 668.5
Q0
Q 10742
T 70
Q 374
No.1 Distilled Plant
Q 50
Q 2666 E 744.1
Inspection Tank
Q0
Q0
Q 50
Q 3280
E 823.6 P 61 T 510
E 733.1 Q 3782 E 733.1 P 2.8
E 721.9
E 697
Q 3834
No.2 Distilled Plant
6.23/2.8
Q 1695
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 4051
Q 105951
Q 7331
Deoiler
62.5/11
Q0
Q 3040
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 581.8
E 823.6 P 61 T 510
62.5/4.2
Q0
11/7
Low Duty Heater
Q 6138
Q0 Q0
E 791 Q 6048
Q 5477
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
Q 9026
Q 7331
Q 102
Calorifier
E 740
15.5/11.5
Q 130
Q 100
P 15.5 E 744.1
L.O. Purifier Heater
Q 2666
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 610
62.5/11
Q 610
M
Steam to Burners
Main Boiler
Q 938
Soot Blowers
M/T Nonextra Steam Rate : 2.34
kg/PS.H
Boiler Efficiency
: 88.5
%
Turbo Generator Load
: 1,513
kW
Evaporator Load
: 60
Ton/Day
Q 2666
Sea Water Temperature
: 27
℃
E 744.1
Air Temperature
: 38
℃
: 10,280
kcal/kg
: In Use
Make-up
Q 1548
Q 13772
Key
F.O High Heat Value
T 35
T 87
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2938 T 70
Drain Tank
Q 322 T 90
Q 102.0
Q 18682
T 100.1
T 76.8
7-5
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.6 90% MCR DUAL Burning Condition Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 107409
Q 95334
P 62.5 T 515
E 823.6 P 61 T 510
Q 230
L.P Turbine
Q 82259
Main Pump
720 mmHg Vacuum
Q 72404
Q 79612
Main Condenser
E 544
T 32.6
P 1.32 E 635.9
Q 9855
P 6.23 E 697
Q 9156
Q 3030
Q 1749 E 649.1
3.1/722 mmHg
Exhaust
Q 4069
Vent
E 744.1
Q 79612
T 50.5
E 138.7
T 76
Q0
Q 3030
Q 3338
T 90
Q 3338
3rd Stage Feed Water Heater
Q 10844
P 2.5 E 127.3
E 129.0
Ship Condition - 90% MCR (Dual Burning) Main Turbine Shaft Horse Power - 36,000 SHP(PS) 85 rpm Normal Fuel Rate - F.O : 3,037.1 kg/h, F.G : 3,896.9 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 107829
E 129
T 53.1
T 99
E 138.7
E 668.5
Q0
Q 531
No.1 Distilled Plant
Q 50
Q 3789
T 70
Inspection Tank
Q0
Q0
Q 50
Q 3338
E 823.6 P 61 T 510
E 732.9 Q 3826 E 732.9 P 2.8
E 721.6
E 697
Q 3878
No.2 Distilled Plant
6.23/2.8
Q 1749
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 4069
Q 107829
Q 7407
Deoiler
62.5/11
Q0
Q 4320
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 583.2
E 823.6 P 61 T 510
62.5/4.2
Q 1560
11.5/7
Low Duty Heater
Q 7248
Q0 Q0
E 791 Q 7158
Q 5575
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
E 740
Q 7407
Q 102
Calorifier
Q 130
Q 100
P 15.5 E 744.1
L.O. Purifier Heater
Q 3789
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 420
62.5/11
Q 420
M
Steam to Burners
Main Boiler
Q 949
Soot Blowers
M/T Nonextra Steam Rate : 2.34
kg/PS.H
Boiler Efficiency
: 85.1
%
Turbo Generator Load
: 1,797
kW
Evaporator Load
: 60
Ton/Day
Q 3789
Sea Water Temperature
: 27
℃
E 744.1
Air Temperature
: 38
℃
: 13,280/10,280 kcal/kg : In Use
Make-up
Q 1370
Q 13873
Key
F.G/F.O High Heat Value
T 35
T 86.9
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: 0.15
%/Day
Drain Line
S.G. of Cargo
: 470
kg/m3
Q 2658 T 70
Drain Tank
Q 322 T 90
Q 1662
Q 19885
T 90.7
T 78
7-6
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.7 90% MCR BOIL OFF GAS Burning Condition Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 109549
Q 97032
P 62.5 T 515
E 823.6 P 61 T 510
Q0
L.P Turbine
Q 81523
Main Pump
720 mmHg Vacuum
Q 71708
Q 79296
Main Condenser
E 544
T 32.6
P 1.32 E 635.9
Q 9815
P 6.23 E 697
Q 3030
Q 1850 E 649.1
3.1/722 mmHg
Exhaust
Q 4091
Vent Q 79296
T 50.6
Q0
E 138.7
T 76
Q 3401
Q 3030
Q 3401
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 90% MCR (B.O.G Burning) Main Turbine Shaft Horse Power - 36,000 SHP(PS) 85 rpm Normal Fuel Rate - 180.1 G/PS H, 6,483.6 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 109849
E 129
T 53.2
T 99
E 138.7
E 668.5
Q0
Q 10826
T 70
Q 847
No.1 Distilled Plant
Q 50
Q 6037 E 744.1
Inspection Tank
Q0
Q0
Q 50
Q 3401
E 823.6 P 61 T 510
E 732.7 Q 3875 E 732.7 P 2.8
E 721.2
E 697
Q 3927
No.2 Distilled Plant
6.23/2.8
Q 1850
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
E0 Q 4091
Q 109849
Q 7492
Deoiler
62.5/11
Q0
Q 6884
Drain Cooler
Q0
Air Conditioning Unit
Turbo Generator E 584
E 823.6 P 61 T 510
62.5/4.2
Q 1560
11/7
Low Duty Heater
Q 7628
Q 2784 Q0
E 791 Q 7538
Q 5725
62.5/5.5
Q0
Q 3030
Q 90 Q0
Forcing Vaporizer
Q 9342
Q 7492
Q 102
Calorifier
E 740
15.5/11.5
Q 130
Q 100
P 15.5 E 744.1
L.O. Purifier Heater
Q 6037
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 300
62.5/11
M
Steam to Burners
Q 300
Main Boiler
Q 962
Soot Blowers
M/T Nonextra Steam Rate : 2.34
kg/PS.H
Boiler Efficiency
: 84
%
Turbo Generator Load
: 1,891
kW
Evaporator Load
: 60
Ton/Day
Q 6037
Sea Water Temperature
: 27
℃
E 744.1
Air Temperature
: 38
℃
: 13,280
kcal/kg
: In Use
Make-up
Q 1262
Q 13856
Key
F.G High Heat Value
T 35
T 86.9
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: 0.15
%/Day
Drain Line
S.G. of Cargo
: 470
kg/m3
Q 2438 T 70
Drain Tank
Q 322 T 90
Q 4446
Q 22324
T 90.3
T 79.3
7-7
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.8 50% MCR FO Burning Condition Q0 Q0
F.O. Tank Heating
Q 2238
H.P Turbine
Q 59687
Q 49922
P 62.5 T 515
E 823.6 P 61 T 510
Q 325
L.P Turbine
Q 49792
Main Pump
720 mmHg Vacuum
Q 44869
Q 50730
Main Condenser
E 552
T 32.6
P 0.78 E 634.5
Q 4923
P0 E0
Q0
Q 1809
Q 3030
Q0 E 649.1
3.1/722 mmHg
Exhaust
Q 2768
Vent Q 50730
T 60.8
Q0
E 138.7
T 76
Q 2181
Q 3030
Q 2181
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 50% MCR (F.O Burning) Main Turbine Shaft Horse Power - 20,000 SHP(PS) 69.8 rpm Normal Fuel Rate - 245.9 G/PS H, 4,918 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 69773
E 129
T 64.8
T 84.6
E 138.7
E 668.5
Q0
Q 4611
T 70
Q 117
No.1 Distilled Plant
Q 50
Q0 E0
Inspection Tank
Q0
Q0
Q 50
Q 2181
E 823.6 P 61 T 510
E 736.4 Q 3102 E 736.4 P 2.8
4.2/2.8
E 719.9
Q 3154
Q 4911
E 691.7
Q 4949
Q 1809
Boiler Feed Water Pump Turbine Q 52
T 145
Q 69773
E 691.7 Q 2768 62.5/11
Q 2748
Deoiler
Q 2865
Drain Cooler
Q0
11/7
Air Conditioning Unit
No.2 Distilled Plant
Turbo Generator E 581.9
E 823.6 P 61 T 510
62.5/4.2
Q0
E 791 Q 5811
Q 5901
Q0 Q 1809
Low Duty Heater
62.5/5.5
Q0
Q 3030
Q 90 Q 4949
Forcing Vaporizer
E 740
Q0
Q 102
Calorifier
P0 E0
Q 100
Q0
L.O. Purifier Heater
Q 130
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 10086
62.5/11
Q 580
M
Steam to Burners
Main Boiler
Q 710
Soot Blowers
M/T Nonextra Steam Rate : 2.42
kg/PS.H
Boiler Efficiency
: 87.9
%
Turbo Generator Load
: 1,450
kW
Evaporator Load
: 60
Ton/Day
Q 2748
Sea Water Temperature
: 27
℃
E 691.7
Air Temperature
: 38
℃
: 10,280
kcal/kg
: In Use
Make-up
Q 1290
Q 7641
Key
F.O High Heat Value
T 35
T 84.4
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Scoop Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2763 T 70
Drain Tank
Q 322 T 90
Q 102.0
Q 12118
T 100.1
T 73.4
7-8
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.9 30% MCR FO Burning Condition Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 39802
Q 30429
P 62.5 T 502.9
E 819.6 P 61 T 502.9
Q 235
L.P Turbine
Q 30299
Main Pump
720 mmHg Vacuum
Q 30299
Q 36133
Main Condenser
E 563.3
T 32.6
P0 E0
Q0
P0 E0
Q0
Q 4229
Q 3030
Q0 E 649.1
3.1/722 mmHg
Exhaust
Q 2099
Vent Q 36133
T 72.1
Q0
E 138.7
T 76
Q 1587
Q 3030
Q 1587
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 129.0
Ship Condition - 30% MCR (F.O Burning) Main Turbine Shaft Horse Power - 12,000 SHP(PS) 58.9 rpm Normal Fuel Rate - 296.2 G/PS H, 3,554.4 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 50872
E 129
T 77.7
T 78.2
E 138.7
E 668.5
Q0
Q 2099
T 70
Q 120
No.1 Distilled Plant
Q0
Q0 E0
Inspection Tank
Q0
Q0
Q 50
Q 1687
E 819.6 P 61 T 502.9
E 733.7 Q 2806 E 733.7 P 2.8
4.2/2.8
E 721.5
Q 2858
Q 4005
E 692.9
Q 3686
Q 4229
Boiler Feed Water Pump Turbine Q 52
T 145
Q 50872
E 692.9 Q 2099 62.5/11
Q 2655
Deoiler
Q 2775
Drain Cooler
Q0
11/7
Air Conditioning Unit
No.2 Distilled Plant
Turbo Generator E 581.9
E 819.6 P 61 T 502.9
62.5/4.2
Q0
E 791 Q 5834
Q 5924
Q0 Q 4229
Low Duty Heater
62.5/5.5
Q0
Q 3030
Q 90 Q 3686
Forcing Vaporizer
E 740
Q0
Q 102
Calorifier
P0 E0
Q 100
Q0
L.O. Purifier Heater
Q 130
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 11070
62.5/11
Q 500
M
Steam to Burners
Main Boiler
Q 591
Soot Blowers
M/T Nonextra Steam Rate : 2.53
kg/PS.H
Boiler Efficiency
: 87
%
Turbo Generator Load
: 1,434
kW
Evaporator Load
: 60
Ton/Day
Q 2655
Sea Water Temperature
: 27
℃
E 692.9
Air Temperature
: 38
℃
: 10,280
kcal/kg
: In Use
Make-up
Q 1091
Q 5129
Key
F.O High Heat Value
T 35
T 87.1
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Pump Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2673 T 70
Drain Tank
Q 322 T 90
Q 102.0
Q 9317
T 100.1
T 71.0
7-9
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.10 Cargo Unloading Condition (FO) Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 31211
Q0
P 62.5 T 488.5
E0 P0 T0
Q 180
L.P Turbine
Q0
Main Pump
720 mmHg Vacuum
Q0
Q 27796
Main Condenser
E0
T 32.6
P0 E0
Q0
P0 E0
Q0
Q0
E 649.1
Q 50
3.1/722 mmHg
Q0
Exhaust
Q 1699
Vent
Q0 Q 27796
T 32.6
Q0
E 138.7
T0
Q 1241
Q0
Q 1241
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 128.3
Ship Condition - Unloading (F.O Burning) Main Turbine Shaft Horse Power - -SHP(PS) - rpm Normal Fuel Rate - - G/PS H, 2,759.1 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 39558
E 128.3
T 39.1
T 39.6
E 138.7
E 668.5
Q0
Q 1699
T 70
Q 102
No.1 Distilled Plant
Q0
E0
Inspection Tank
Q0
Q0 Q 2249
4.2/2.8
E 711.5
E 811.5 P 61 T 488.5
E 729.7 Q 2663 E 730.1 P 2.8
Q 4912
E 689.5
Q 2940
Q 2249
Q 2715
Q 1241
No.2 Distilled Plant
Turbo Generator E 602.5
Boiler Feed Water Pump Turbine Q 52
T 145
Q 39558
E 689.5 Q 1699 62.5/11
Q 2618
Deoiler
Q 2720
Drain Cooler
Q0
11/7
Air Conditioning Unit
E 811.5 P 61 T 488.5
62.5/4.2
Q0
E 791 Q 27796
Q 27976
Q0 Q 2249
Low Duty Heater
62.5/5.5
Q0
Q0
Q 180 Q 2940
Forcing Vaporizer
E0
Q0
Q 102
Calorifier
Q0
Q 100
Q0
L.O. Purifier Heater
P0 E0
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 8347
62.5/11
Q 540
M
Steam to Burners
Main Boiler
Q 520
Soot Blowers
M/T Nonextra Steam Rate : -
kg/PS.H
Boiler Efficiency
: 86.3
%
Turbo Generator Load
: 6,475
kW
Evaporator Load
: -
Ton/Day
Q 2618
Sea Water Temperature
: 27
℃
E 689.5
Air Temperature
: 38
℃
: 10,280
kcal/kg
: In Use
Make-up
Q 1060
Q 1699
Key
F.O High Heat Value
T 35
T 90
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Pump Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2618 T 70
Drain Tank
Q 282 T 90
Q 102.0
Q 5761
T 100.1
T 69.4
7 - 10
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.11 Cargo Loading Condition (FO) Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 20513
Q0
P 62.5 T 471.4
E0 P0 T0
Q 120
L.P Turbine
Q0
Main Pump
720 mmHg Vacuum
Q0
Q 17296
Main Condenser
E0
T 32.6
P0 E0
Q0
P0 E0
Q0
Q0
Q0 Q 520
E 649.1
Q 50
3.1/722 mmHg
Exhaust
Q 1224
Vent Q 17296
T 32.6
Q0
E 138.7
T0
Q 827
Q0
Q 827
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 128.3
Ship Condition - Loading (F.O Burning) Main Turbine Shaft Horse Power - -SHP(PS) - rpm Normal Fuel Rate - - G/PS H, 1,817.9 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 26164
E 128.3
T 43.1
T 43.7
E 138.7
E 668.5
Q0
Q 1224
T 70
Q 80
No.1 Distilled Plant
Q0
Q0 E0
Inspection Tank
Q0
Q0 E 719.3
E 801.8 P 61 T 471.4
E 726.2 Q 2550 E 726.2 P 2.8
4.2/2.8
Q 3070
E 685.6
Q 2051
Q 520
Q 2602
Q 827
No.2 Distilled Plant
Turbo Generator E 585.4
Boiler Feed Water Pump Turbine Q 52
T 145
Q 26164
E 685.4 Q 1224 62.5/11
Q 2580
Deoiler
Q 2660
Drain Cooler
Q0
11/7
Air Conditioning Unit
E 801.8 P 61 T 471.4
62.5/4.2
Q0
E 791 Q 17296
Q 17476
Q0 Q 520
Low Duty Heater
62.5/5.5
Q0
Q0
Q 180 Q 2051
Forcing Vaporizer
E0
Q0
Q 102
Calorifier
Q0
Q 100
Q0
L.O. Purifier Heater
P0 E0
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 5651
62.5/11
Q 500
M
Steam to Burners
Main Boiler
Q 435
Soot Blowers
M/T Nonextra Steam Rate : -
kg/PS.H
Boiler Efficiency
: 85.4
%
Turbo Generator Load
: 4,077
kW
Evaporator Load
: -
Ton/Day
Q 2580
Sea Water Temperature
: 27
℃
E 685.4
Air Temperature
: 38
℃
: 10,280
kcal/kg
: In Use
Make-up
Q 935
Q 1224
Key
F.O High Heat Value
T 35
T 90
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Pump Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2558 T 70
Drain Tank
Q 282 T 90
Q 102.0
Q 5101
T 100.1
T 68.7
7 - 11
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
Machinery Operating Manual
LNGC GRACE ACACIA 7.12 Hotel Load Condition (FO) Q0 Q0
F.O. Tank Heating
Q 2338
H.P Turbine
Q 8714
Q0
P 62.5 T 459
E0 P0 T0
Q 60
L.P Turbine
Q0
Main Pump
720 mmHg Vacuum
Q0
Q 6830
Main Condenser
E0
T 32.6
P0 E0
Q0
P0 E0
Q0
Q0
Q0 Q0
E 649.1
3.1/722 mmHg
Exhaust
Q 751
Vent Q 6830
T 32.6
Q0
E 138.7
T0
Q 407
Q0
Q 407
3rd Stage Feed Water Heater
T 90
P 2.5 E 127.3
E 128.3
Ship Condition - Hotel Load (F.O Burning) Main Turbine Shaft Horse Power - -SHP(PS) - rpm Normal Fuel Rate - - G/PS H, 868.9 kg/h Design Base
1st Stage Gland Steam Feed Water Condenser Heater
Deaerator
Q 12805
E 129
T 50.2
T 51.0
E 138.7
E 668.5
Q 20000
Q 751
T 70
Q 67
No.1 Distilled Plant
Q0
Q0 E0
Inspection Tank
Q0
Q 1239
Q 50
Q 407
E 794.7 P 61 T 459
E 718.3 Q 2630 E 718.3 P 2.8
E 718.8
Q 2682
4.2/2.8
Q 1391
E 682.9
Q 1158
Q0
Boiler Feed Water Pump Turbine Q 52
T 145
Q 12805
E 682.9 Q 751 62.5/11
Q 2533
Deoiler
Q 2600
Drain Cooler
Q0
11/7
Air Conditioning Unit
No.2 Distilled Plant
Turbo Generator E 583.3
E 794.7 P 61 T 459
62.5/4.2
Q0
E 791 Q 5591
Q 5681
Q0 Q0
Low Duty Heater
62.5/5.5
Q0
Q0
Q 90 Q 1158
Forcing Vaporizer
E0
Q0
Q 102
Calorifier
Q0
Q 100
Q0
L.O. Purifier Heater
P0 E0
M
Boiler F.O. Heater
Vacuum Pump
Loss
Q 4091
62.5/11
Q 400
M
Steam to Burners
Main Boiler
Q 351
Soot Blowers
M/T Nonextra Steam Rate : -
kg/PS.H
Boiler Efficiency
: 85
%
Turbo Generator Load
: 1,274
kW
Evaporator Load
: -
Ton/Day
Q 2533
Sea Water Temperature
: 27
℃
E 682.9
Air Temperature
: 38
℃
: 10,280
kcal/kg
: In Use
Make-up
Q 751
Q 751
Key
F.O High Heat Value
T 35
T 90
Superheated Steam Feed and Condensate
Air Cond. Plant (Cooling) Main Condenser
: Pump Cooling
Desuperheated Steam Low Pressure Steam
Main Feed Water Pump
: 175 m3/h x 865 MTH
Boil-off Rate
: -
%/Day
Drain Line
S.G. of Cargo
: -
kg/m3
Q 2498 T 70
Drain Tank
Q 192 T 90
Q 102.0
Q 4294
T 100.1
T 67.9
7 - 12
Q : kg/h E : kcal/kg P : kg/cm2A T:℃
Part 7 Steam Plant Heat Balance System
LNGC GRACE ACACIA
Machinery Operating Manual
Part 8 : General Information 8.1 Maker List ......................................................................................... 8 - 1 8.2 Tank Capacity Plan and List.............................................................. 8 - 5 8.3 Lubrication Oil Chart ........................................................................ 8 - 7
Part 8 General Information Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA Part 8: General Information 8.1 Maker List No. 1
2
3
4
Equipment
Main Turbine
Main Condenser
Vacuum Pump Unit
External Desuper heater for dumping steam line
Q'ty 1
1
2
2
Specification
Maker / Supplier
Type : Two Cyl Cross Compound Marine steam turbine. Consisting of HP Turbine & LP Turbine with builtin Astern Turbine.
HHI-MHI
Type : Single Pass-scoop cooled Vacuum : 722MMHG C.W. Temp : 27℃ C.W.Q’TY : 18,100M3/H (By Scoop sys.)
HHI
Type : Rotary Liquid Ring Vacuum level : 735MMHGV Seal Flow : 6.8 M3/H
NASH-Elmo Korea
Type : Water spray With Silencer Inlet Steam Press x temp : - 0.4MPa x 289℃ Cooling Water Press x temp : - 0.95MPa x 32.6℃ Outlet Steam Press x temp : - 0.4MPa x 160℃
Model MS 40-2
Fax /Tel F) +82-52-230-6894
NASH-AT1006
NANSEI (YARWAY)
F) +82-2-2636-9163 T) +82-2-2068-7047
F) +81-3-3355-0794 T) +81-3-3358-1044
2
Type : Two Drum Water Tube Evaporation : 52,000kg/H(NOR) 70,000kg/H(MAX)
Mitsubishi Heavy Ind. Ltd.
Burner
3
Harmworthy Oil / Gas Combination Proof Fired – Down ward firing.
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091 T) +81-95-828-6641
8
Steam air heater
2
Tubular extended surface type
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091 T) +81-95-828-6641
9
Forced Draft Fan
3
1,280M /Min x 5.6kPa x 3sets
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091 T) +81-95-828-6641
10
F.O Pump
3
12.6M3/Min x 2.8MPa x 2sets
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091
11
F.O Heater
2
100% x 2sets
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091
LONG RETRA x 2sets STAT. ROTARY x 8sets
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091
Tubular x Extended Surface Type
Mitsubishi Heavy Ind. Ltd.
F) +81-95-828-5091
1/1
6
Main Boiler
7
12
Soot Blower
13
Economizer
14
Propeller Shaft
15
Intermediate Shatf
2
3
1
Material : Solid Forged Steel (SF60) Dia x Length (MM) : 795 x 10,563
1
Material : Solid Forged Steel (SF60) Dia x Length (MM) : 620 x 12,500
HHI-EMD HHI-EMD
16
Q'ty
Specification
Maker / Supplier
1
Aft : Air Guard. Fwd : Stern guard.
Japan Marine. Tec. Ltd
F) +81-76-451-3161 T) +81-76-451-3150
17
Stern Tube Bush
1
Type : Oil Lub. Dimension (I.D x O.D x length) : Aft : 796.2 x 938 x 1,600 Fwd : 798.2 x 938 x 550
Japan Marine. Tec. Ltd
F) +81-76-451-3161 T) +81-76-451-3150
18
Intermediate Shaft Bearing
2
Type : Forced Lub. Model Size : #630 Dimension (Id x length) : 625.7 x 490
Japan Marine. Tec. Ltd
F) +81-76-451-3161 T) +81-76-451-3150
19
Shaft Grounding Device
1
Intermediate Shaft : Dia 620
K.C.KTD
F) +82-51-831-7726 T) +82-51-831-7720
20
Propeller Shaft Nut
1
Type : Forged Steel Plain Max Stroke : 36 MM Working Pressure : 63MPa
HHI-EMD
F) +82-52-230-7692 T) +82-52-230-7324
21
Propeller
1
Type : F.P.P / KEYLESS Material : NI-AL-BRONZE Pitch(Mean) : 7,535.42 MM Out Dia : 8.6M, No. of Blade : 6
HHI-EMD
F) +85-52-230-7692 T) +82-52-230-7324
22
Steering Gear
1
Type : VANE M.W.T(at 35 deg) : 3500 KN-M M.W.A : 45 deg under 12Knots
ROLLS-ROYCE
F) +47-56-30-8241 T) +47-56-57-1600
23
Diesel Engine for Generator
2
Type : 4-Stroke, Trunk piston Output : ABT. 2,890 PS Revolution : 720 rpm
HHI-EMD
7L 27/38
F) +82-52-230-7696 T) +82-85-230-7272
24
Generator (D/G)
2
Output : 1,950 kW Voltage : AC 6,600V Revolution : 720 rpm
HHI-EES
HSJ7 71510P
F) +82-52-230-6995 T) +82-52-230-6611
25
Turbine For Generator
2
Type : Multi-Stage Impulse Rated Output : 3,850 kW Rated Speed(turbine/output): 8,145 : 1,800 rpm
SHINKO
RG 92-2
F) +81-52-508-1020 T) +81-82-508-1000
26
Generator (T/G)
2
Output : 3,850 kW Voltage : AC 6,600V Revolution : 1,800 rpm
HHI-EES
HSJ7 719 -4P
F) +82-52-230-6995 T) +82-52-230-6611
27
G/E Starting Air Compressor
2
Type : M.D. 2 stage Reciprocating, Air cooled Cap : 25M3/H Disch. Press : 2.5MPa
JONGHAP
AHV-20
F) +82-51-831-3772 T) +82-51-831-3277
28
Working Air Compressor
1
Type : M.D. Rotary Screw, F.W Cooled Cap : 350M3/H Disch. Press : 0.9MPa
ATLAS COPCO
GA45WP -150-60
F) +82-51-518-4392 T) +82-51-518-4393
29
Control Air Compressor
2
Type : M.D. Rotary Screw, F.W Cooled Cap : 350M3/H Disch. Press : 0.9MPa
ATLAS COPCO
GA45WP -150-60
F) +82-51-518-4392 T) +82-51-518-4393
30
G/E Starting Air Reservoir
2
Type : Cylinderical Volume : 0.5M3 Press. : 2.5MPa
KANGRIM
AR08AB6V
F) +82-55-269-7795 T) +82-55-269-7786
F) +82-52-230-6894 T) +82-52-230-6820
NANSEI (YARWAY)
5
Equipment Stern Tube Seal
T) +82-52-230-6820
Type : Water Spray Inlet Steam Press x temp : - 1MPax 349.2℃ Cooling Water Press x temp : - 3MPa x 127℃ Outlet Steam Press x temp : - 1MPa x 191℃
External desuper heater for aux steam line / Manual type
No.
F) +81-3-3355-0794 T) +81-3-3358-1044
MB-4E-KS
F) +81-95-828-5091 T) +81-95-828-6641
T) +81-95-828-6641 T) +81-95-828-6641 T) +81-95-828-6641 T) +81-95-828-6641 HHI / STD HHI / STD
F) +82-82-230-7692 T) +82-52-230-7324 F) +82-82-230-7692 T) +82-52-230-7324
8-1
Model
Fax /Tel
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
No.
Equipment
Q'ty
Specification
Maker / Supplier
Model
Fax /Tel
No.
Equipment
Q'ty
Specification
Maker / Supplier
Model
Fax /Tel
31
Working Air Reservoir
1
Type : Cylinderical Volume : 7.5M3 Press. : 0.9MPa
KANGRIM
AR27AA4V
F) +82-55-269-7795 T) +82-55-269-7786
50
Aux. Cent. Cool F.W. Boost Pump
2
Cap : 150 M3/H x 30 MTH Motor : 22 kW x 1,800 rpm
SHINKO
M.D.V.C (SAG125M)
F) +81-82-508-1020 T) +81-82-508-1000
32
Control Air Reservoir
1
Type : Cylinderical Volume : 7.5M3 Press. : 0.9MPa
KANGRIM
AR27AA4V
F) +82-55-269-7795 T) +82-55-269-7786
51
Oily Bilge Pump
1
Cap : 5 M3/H x 0.4MPa Motor : 3.7 kW x 1,200 rpm
TAIKO
M.D.H.G(MONO) (HNP401))
F) +81-820-53-1001 T) +81-820-52-3112
33
Air Dryer
2
Type : Absorption Cap : ABT 250 NM3/H Free Air
KYUNG-NAM
KHDM -350
F) +82-31-962-0180 T) +82-31-963-0080
52
E/R Bilge Pump
1
Cap : 10 M3/H x 45 MTH Motor : 3.7 kW x 1,200 rpm
SHINKO
M.D.V. Piston (VPS10)
F) +81-82-508-1020 T) +81-82-508-1000
34
Air Dryer
1
Type : Refrigerated Cap : ABT 250 NM3/H Free Air
KYUNG-NAM
KADM -300
F) +82-31-962-0180 T) +82-31-963-0080
53
1
M.D.H.G(MONO) (HNP401))
F) +81-820-53-1001 T) +81-820-52-3112
35
2
Type : Turbine Driven Horizontal Centrifugal Cap : 170 M3/H x 865 MTH
Cap : 5 M3/H x 0.4MPa Motor : 3.7 kW x 1,200 rpm
TAIKO
Main Feed Water Pump And Turbine
SHINKO
DMG125-3
F) +81-82-508-1020 T) +81-82-508-1000
Waste Oil Transfer Pump
54
2
TAIKO
M.D.H.G (NHG-3MT)
F) +81-820-53-1001 T) +81-820-52-3112
36
1
Cap : 6,000/4,500 M3/H x 5/8 MTH Motor : 1500 kW x 400 rpm
SHINKO
M.D.V.C (CVF850M)
Cap : 3 M3/H x 3 KDP Motor : 1.5 kW x 1,200 rpm
Main S.W Circ. Pump
F) +81-82-508-1020 T) +81-82-508-1000
Main L.O Purifier Supply Pump
55
L.O. Transfer Pump
1
Cap : 5 M3/H x 4 KDP Motor : 2.2 kW x 1,200 rpm
TAIKO
M.D.H.G (NHG-5MT)
F) +81-820-53-1001 T) +81-820-52-3112
37
Aux. S.W Circ. Pump
1
Cap : 6,000/4,500 M3/H x 5/8 MTH Motor : 150 kW x 400 rpm
SHINKO
M.D.V.C (CVF850LM)
F) +81-82-508-1020 T) +81-82-508-1000
56
H.F.O. Transfer Pump
1
Cap : 50 M3/H x 4 KDP Motor : 22 kW x 1,200 rpm
TAIKO
M.D.V.G (VG-50MAB)
F) +81-820-53-1001 T) +81-820-52-3112
38
Main Cooling S.W. Pump
2
Cap :1,200 M3/H x 21 MTH Motor : 110 kW x 1,200 rpm
SHINKO
M.D.V.C (SVA400M)
F) +81-82-508-1020 T) +81-82-508-1000
57
1
Cap : 30 M3/H x 4 KDP Motor : 15 kW x 1,200 rpm
TAIKO
M.D.H.G (HG-35MAB)
F) +81-820-53-1001 T) +81-820-52-3112
39
Main Central Cooling F.W. Pump
2
Cap :1,100 M3/H x 30 MTH Motor : 132 kW x 1,200 rpm
SHINKO
M.D.V.C (SVA350M)
F) +81-82-508-1020 T) +81-82-508-1000
M.D.O. Transfer Pump
58
1
F) +81-82-508-1020 T) +81-82-508-1000
Cap : 2 M3/H x 2.5 KDP Motor : 2.2 kW x 1,200 rpm
TAIKO
M.D.H.C.F (HJ40-2M)
Incinerator M.D.O Serv. Pump
M.D.H.G (WL-4M)
F) +81-820-53-1001 T) +81-820-52-3112
M.D.V.C (EVZ 130M)
59
2
Cap : 1 M3/H x 2.5 KDP Motor : 0.75 kW x 1,200 rpm
TAIKO
F) +81-82-508-1020 T) +81-82-508-1000
Stern Tube L.O. Pump
M.D.H.G (NHG-1MT)
F) +81-820-53-1001 T) +81-820-52-3112
60
M.D.O. Purifier Supply Pump
1
Cap : 3 M3/H x 3 KDP Motor : 1.5 kW x 1,200 rpm
TAIKO
M.D.H.G (NHG-4MAB)
F) +81-820-53-1001 T) +81-820-52-3112
61
FO Additive Dosing Pump
1
Cap : 2 M3/H x 3 KDP Motor : 1.5 kW x 1,200 rpm
TAIKO
M.D.H.G (NHG-2.5MAB)
F) +81-820-53-1001 T) +81-820-52-3112
2
Type : Automatic, Self-cleaning, Partial Disch. With Separate Supply Pump Cap : 3,000 L/H Motor Output : 7.5 kW Speed : 1,765 rpm
SAMGONG
SJ30GH
F)+82-51-200-3046 T)+82-51-200-3040
1
Type : Automatic, Self-cleaning, Total Disch. With Separate Supply Pump Cap : 3,000 L/H Motor Output : 5.5 kW Speed : 1,770 rpm
SAMONG
SG20G
F)+82-51-200-3046 T)+82-51-200-3040
2
Type : S.W. Cooled Heat Dissipation : 4,000,000 Kcal/h Heat Transfer Area : 294.4 M2
ALFA-LAVAL
M30-FM
F) +82-2-3406-0701 T) +82-2-3406-0714
ALFA-LAVAL
M20-MFM
F) +82-2-3406-0701 T) +82-2-3406-0714
ALFA-LAVAL
M6-MFM
F) +82-2-3406-0701 T) +82-2-3406-0714
40
Hot Water Circ. Pump
3
2
Main Condensate Pump
2
42
Condensate drain Pump
43
Cap :2 M /H x 10 MTH Motor : 0.75 kW x 1,800 rpm
SHINKO
3
Cap :110 M /H x 95 MTH Motor : 55 kW x 1,800 rpm
SHINKO
3
Cap : 40 M3/H x 85 MTH Motor : 22 kW x 1,800 rpm
SHINKO
M.D.V.C (EVZ 70MH)
F) +81-82-508-1020 T) +81-82-508-1000
Cold Start Boiler Feed Water Pump
1
Cap : 6 M3/H x 250 MTH Motor : 18.5 kW x 1,800 rpm
SHINKO
M.D.V.C (SK40MC)
F) +81-82-508-1020 T) +81-82-508-1000
44
Bilge Fire & General Service Pump
2
45
Fire Line Pressuring Pump
1
Cap : 2 M /H x 50 MTH Motor : 3.7 kW x 3,600 rpm
46
Water Spray Pump
1
Cap : 850 M3/H x 110 MTH Motor : 400 kW x 1,800 rpm
41
Cap : 245/150 M3/H x 30/115 MTH Motor : 110 kW x 1,800 rpm
47
Ballast Pump
3
48
Distilling Plant S.W. Feed Pump
2
Cap : 90 M3/H x 43 MTH Motor : 22 kW x 1,800 rpm
2
Cap : 170 M3/H x 0.3MPa Motor : 37 kW x 1,800 rpm
49
Aux L.O. Pump
M.D.V.C-SP Self priming (RVP2002MS)
F) +81-82-508-1020 T) +81-82-508-1000
SHINKO
M.D.H.C (HJ40-2M)
F) +81-82-508-1020 T) +81-82-508-1000
SHINKO
M.D.V.C (KV300K)
F) +81-82-508-1020 T) +81-82-508-1000
SHINKO
M.D.V.C-SP (GVD5003M)
F) +81-82-508-1020 T) +81-82-508-1000
SHINKO
M.D.V.C (SVA1252M)
SHINKO
M.D.V.CTM DEEP WELL (SAG150)
SHINKO
3
Cap : 3,000 M3/H x 30 MTH Motor : 355 kW x 1,200 rpm
62
Main L.O. Purifier
63
M.D.O. Purifier
64
Central F.W. Cooler
F) +81-82-508-1020 T) +81-82-508-1000
65
M/T L.O. Cooler
2
Type : SUS Plate, F.W. Cooled Heat Dissipation : 760,000 Kcal/h Heat Transfer Area : 177.7 M2
F) +81-82-508-1020 T) +81-82-508-1000
66
Stern Tube L.O. Cooler
1
Type : SUS Plate, F.W. Cooled Heat Dissipation : 5,000 Kcal/h Heat Transfer Area : 2.1 M2
8-2
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
No.
Equipment
Q'ty
Specification
Maker / Supplier
Model
Fax /Tel
ALFA-LAVAL
DONGHWA
F) +82-51-970-1031 T) +82-51-970-1070
67
D/G F.W. Cooler
2
Type : S.W. Cooled Heat Dissipation : 2,707,300 Kcal/h Heat Transfer Area : 51.5 M2
68
Oil Heating Drain Cooler
1
Type : S&T, F.W. Cooled Heat Dissipation : 90,000 Kcal/h Heat Transfer Area : 3 M2
69
Aux. Condenser
1
Type : S&T, S.W. Cooled Heat Dissipation : 47,081,750 Kcal/h Heat Transfer Area : 405 M2
DONGHWA
F) +82-51-970-1031 T) +82-51-970-1070
70
Main L.O. Purifier Hearter
2
Type : S&T, Steam Heated Heat Dissipation : 55,688 Kcal/h Heat Transfer Area : 2.55 M2
DONGHWA
71
1st Stage Feed Water Heater
Type : S&T Heat Dissipation : 4,232,000 Kcal/h Heat Transfer Area : 100 M2
72
3rd Stage Feed Water Heater
Type : S&T Heat Dissipation : 2,037,199 Kcal/h Heat Transfer Area : 43.1
73
Deaerator
1
Type : Spray Scrubber Type Cap : 30 M3 Diposed Feed W. Q’ty :117,615 Disposed Feed Temp : 138.2℃
DONGHWA
F) +82-51-970-1031 T) +82-51-970-1070
74
F.W. Generator (Distilling Plant)
2
Type :Cond. Water Cooled (VSP-36-C125CC) S.W. Cooled (VSP-36-C125SWC) Cap : 60 ton/Day Max. Salinity (ppm) : 1.5
ALFA-LAVAL
F) +45-39-53-6568 T) +45-39-53-6000
E/R Exhaust Vent. Fan
2
M.D. Axial flow, Reversible. Cap : 1,750M3/minx 15mmaq Motor : 22kW x 1,175rpm
Hi-Press Korea Co., Ltd
AQ1400/403
F) +82-55-346-3501 T) +82-55-346-3500
76
E/R Supply Vent. Fan
4
M.D Axial flow, Non-Reversible. Cap : 1,750M3/minx 50mmaq Motor : 37kW x 1,175rpm
Hi-Press Korea Co., Ltd
AQ1400/578
77
Boiler off leak gas extraction fan for fuel gas pipe
2
M.D Centrifugal with Explosion proof Elec. Motor. Cap : 60M3/minx 40mmaq Motor : 1.15kW x 1,123rpm
Hi-Press Korea Co., Ltd
78
Exh. Fan for Welding Space
1
M.D Axial flow. Cap : 30M3/minx 30mmaq Motor : 1.5kW x 1,710rpm
Hi-Pres Korea Co., Ltd
1
M.D Axial flow. Cap : 150M3/minx 50mmaq Motor : 3.7kW x 1,730rpm
Hi-Pres Korea Co., Ltd
75
79
Exh. Fan for Purifier Room
80
Exh. Fan for D/G Room
1
M.D Axial flow. Cap. : 300M3/minx 50mmaq Motor : 5.5kW x 1,740rpm
81
Exh. Fan for Chemical Store
1
82
Exh. Fan for L.O. Grease store
83
Boiler Seal Air Fan
M15-MFM8
F) +82-2-3406-0701 T) +82-2-3406-0714
No.
Equipment
84
Incinerator W.O. Tank Exh. Fan
Q'ty
Specification
Maker / Supplier
Model
Fax /Tel
1
M.D Axial flow. Cap : 8M3/min x 40mmaq Motor : 0.9kW x 1,710rpm
Hi-Pres Korea Co., Ltd
ADW300/190
F) +82-55-346-3501 T) +82-55-346-3500
Munters Korea
M-120
F) +82-2-865-8737 T) +82-2-865-8770
85
Dehumidifier
1
Type : M.D Horizontal, Honeycomb Desiccant. Cap : Process air flow x EXT.Press 50M3/Hx 360Pa Reactivation flow x EXT.Press 35M3/Hx 100Pa
F) +82-51-970-1031 T) +82-51-970-1070
86
Incinerator
1
Type : Sludge Oil & Solid Waste Burning Cap : 700,000 KCAL/H
Hyundai-Atlas Incinerator
MAXI150SL1 WS
F) +82-32-583-0674 T) +82-32-583-0671
DONGHWA
F) +82-51-970-1031 T) +82-51-970-1070
87
Oil Bilge Separator
1
TYPE : GRAVITY AND FILTERING Cap. : 5 M3/H
HANYOUNG ENGINEERING
HYN05000
F) +82-55-345-1684 T) +82-55-345-2933
DONGHWA
F) +82-51-970-1031 T) +82-51-970-1070
88
Viscorator For Main Boiler
1
Type : Pneumatic control
VAF
F) +31-78-617-7068 T) +31-78-618-3100
89
Flow Meter For G/E M.D.O.
1
Type: Positive Displacement Flow Rate(L/H) : Max:1,079, Nor:730, Min:180 Kinematic Viscosity:M.D.O. 13cst @40℃
VAF
F) +31-78-617-7068 T) +31-78-618-3100
90
Flow Meter For G/E H.F.O.
1
Type: Positive Displacement Flow Rate(L/H) : Max:10,665, Nor:8,089, Min:133 Kinematic Viscosity:H.F.O. 700cst @50℃
VAF
F) +31-78-617-7068 T) +31-78-618-3100
91
Mineralizer
1
Type : Dolomite Cap : 5,000 L/H
SAMKUN
MIN-5000
F) +82-55-366-0129 T) +82-55-366-0130
F) +82-55-346-3501 T) +82-55-346-3500
92
Grease Extractor
1
Type : Filter Cloth Cap : 5000L/H
RWO
BFG 4F
F) +49-421-537-0540 T) +49-421-53-70-50
SLC-315
F) +82-55-346-3501 T) +82-55-346-3500
93
M.G.P.S
1
Type : Ionizing Electrode Cap : 18,000 M3/H(For Scoop) 1,700 M3/H(For General Service)
KC Ind.
ADW500/280
F) +82-55-346-3501 T) +82-55-346-3500
94
Sterilizer
1
Type : Ultra Violet Cap : 2,000 L/H
SAMKUN
95
Silver Ion Sterilizer
1
Type : Silver Ion Cap : 5,000 L/H
JOWA AB
F) +46-31-795-45-40 T) +46-31-795-00-44
KANGRIM
F) +82-55-269-7795 T) +82-55-269-7786
AQ-560/380
F) +82-55-346-3501 T) +82-55-346-3500
Hi-Pres Korea Co., Ltd
AQ-710/330
F) +82-55-346-3501 T) +82-55-346-3500
M.D Axial flow. Cap : 30M3/minx 40mmaq Motor : 1.5kW x 1,710rpm
Hi-Pres Korea Co., Ltd
AQ-560/280
1
M.D Axial flow. Cap : 30M3/minx 40mmaq Motor : 1.5kW x 1,710rpm
Hi-Pres Korea Co., Ltd
2
M.D Axial flow. Cap : 8M3/minx 1,100mmaq Motor : 6.3kW x 3,492rpm
Hi-Pres Korea Co., Ltd
F) +82-51-831-7726 T) +82-51-831-7720 JSA-3000
F) +82-55-366-0129 T) +82-55-366-0130
96
Calorifier
1
Type : Steam Heated with Electric Heating Coil (30kW x 2) Flow Rate (L/H) : 2,000 Tank Cap.(L) : 1,500 Heating Range(℃) : 10-70
F) +82-55-346-3501 T) +82-55-346-3500
97
Sewage Treatment Plant
1
Type : Biological Cap : 60 Persons / Day
HAMWORTH KSE
ST3A
F) +44-1202-668793 T) +44-1202-662675
AQ-560/280
F) +82-55-346-3501 T) +82-55-346-3500
98
1
SHINKO
UH202M
F) +44-1202-668793 T) +44-1202-662675
HT 5-700/D
F) +82-55-346-3501 T) +82-55-346-3500
Type : Vertical Centrifugal Pump : 10 M3/H x 70 MTH x 2 sets Tank : 2,000 L x 1 Set Motor : 7.5 kW x 3,600 rpm
8-3
F.W. Hydrophore Unit
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
No.
Equipment
Q'ty
Specification
Maker / Supplier
Model
Fax /Tel
SHINKO
UH102M
F)+44-1202-668793 T)+44-1202-662675
99
D.W.Hydrophore Tank
1
Type : Vertical Centrifugal Pump : 6 M3/H x 65 MTH x 2 sets Tank : 1,000 L x 1 Set Motor : 5.5 kW x 3,600 rpm
100
Auto Backflushing Filter
1
Cap. : 290 M3/H
BOLL & KIRCH
6.61.07GR20 DN200
101
Ferrousion Generator
1
Cap. : 1200 M3/H
Yokohama Denco Co.,ltd
FP-1200
F)+81-45-453-6143 T)+81-45-461-5401
102
Unit Cooler For Workshop
1
Type : Package Cap : Cooling Cap : 54,000 Kcal/h Heating Cap : 43,000 Kcal/h
Hi-Pres KOREA
HIP -20WGDE
F) +82-55-346-3501 T) +82-55-346-3500
103
Unit Cooler For Boiler Test Room
1
Type : Package Cap : Cooling Cap : 9,000 Kcal/h Heating Cap : 8,600 Kcal/h
Hi-Pres KOREA
HIP -3WGE
F) +82-55-346-3501 T) +82-55-346-3500
104
MSBD / ECR Air Cond. Plant
1
Type : Condensing & Central Unit Cap : ABT. 144,480 Kcal/h
Hi-Pres KOREA
GOMT
NSL 580 x 2000G
F) +82-42-936-8105 T) +82-42-936-8100
F) +82-55-346-3501 T) +82-55-346-3500
105
Lathe
1
Cap : Center Distance : 2,000 MM Swing Over Bed : 580 MM Motor(kW) : 7.5
106
Drilling Machine
1
Type : Up-Right Cap : Max. 50 MM Dia. Motor(kW) : 2.2
YOUNGKWANG
NBTG-540
F) +82-54-776-6455 T) +82-54-776-6456
107
Bench Drilling Machine
1
Cap : Max. 16 MM Dia. Motor(kW) : 0.75
YOUNGKWANG
YKD-20
F) +82-54-776-6455 T) +82-54-776-6456
108
Pedestal Grinding Machine
1
Type : Double Wheel CaP : 300 MM Dia. x 1Set – Heavy 150 MM Dia. x 1 Set - Fine
YOUNGKWANG
YKGV -300 / 150
F) +82-54-776-6455 T) +82-54-776-6456
109
Pipe Bender
1
Type : Hydraulic Motor Driven Cap : Pipe Dia. 4 Inch
YOUNGKWANG
TPB-4
F) +82-54-776-6455 T) +82-54-776-6456
110
Pipe Threading M/C
1
Cap. : Pipe Dia. 2inch
YOUNGKWANG
KSU 50A
F) +82-54-776-6455 T) +82-54-776-6456
111
Band Sawing M/C
1
Stroke : 150MM Tuba Dia. : 4inch
YOUNGKWANG
KDBS-200
F) +82-54-776-6455 T) +82-54-776-6456
112
Plasma Cutting M/C
1
Cap : 16 MM
YOUNGKWANG
TKP-90P
F) +82-54-776-6455 T) +82-54-776-6456
113
Gas Welder
1
Type : Central Installation Oxygen Bottle : 10 EA Acetylene Bottle : 5 EA
Unitor KOREA
F) +82-51-728-3848 T) +82-51-728-4900
114
Ballast Stripping Eductor
2
Type : Water Jet Stripping Driving Power : 245 M3/H x 1.1MPa Suction Capacity : 300 M3/H
Teamtec
F) +47-37-19-98-90 T) +47-37-19-98-00
115
Cuno Filter
1
Cap. : 4.5 M3/H
Cuno Filteration
6SL2-KR
F)+65-6863-8218 T)+65-6863-8283
116
Space Heater
10
Cap. : 25,000 Kcal/H
Dongwha Entec.
DH-2
F)+82-51-970-1031 T)+82-51-970-1070
8-4
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA 8.2 Tank Capacity Plan and List Cargo Tanks
Capacities
Location Frame Number
Compartment
Fresh Water Tanks Max. F.S.M. (m4)
Centre of Gravity
Volume 100% (m3)
Volume 98.0% (Ton)
L.C.G. From Mid (Mid)
V.C.G. Above B.L. (Mid)
Location Frame Number
Compartment
DISTILLED W. TK (P) No. 1 CARGO TK
118.1 - 128.9
24619.3
11339.6
79.57
17.797
103566
No. 2 CARGO TK
103.1 - 116.9
43233.3
19913.3
38.00
16.662
206520
No. 3 CARGO TK
88.1 - 101.9
43233.3
19913.3
-10.19
16.662
206520
No. 4 CARGO TK
74.1 - 86.9
38644.1
17799.5
-56.01
16.662
184617
149730.0
68965.7
Total
Water Ballast Tanks
Compartment
Location Frame Number
-6.1 - 10.0
Centre of Gravity
Volume 100% (m3)
Weight 100% (Tons)
L.C.G. (m)
V.C.G. (m)
Capacities
Centre of Gravity
Weight 100% (Tons)
L.G. (m)
V.C.G. (m)
268.4
268.4
-134.77
18.943
305
Volume 100% (m3)
-6.1 - 10.0
268.4
268.4
-134.77
18.943
305
DRINKING W. TK (P)
10.0 - 17.0
197.1
197.1
-126.61
18.863
374
DOMESTIC F.W. TK (S)
10.0 - 17.0
197.1
197.1
-126.61
18.863
374
Total
931.1
931.0
Fuel Oil Tanks
Max. F.S.M. (m4)
Max. F.S.M. (m4)
DISTILLED W. TK (S)
S.G.=1.025
Capacities
S.G.=1.000
Location Frame Number
Compartment
S.G.=0.97
Capacities Volume 100% (m3)
Weight 95% (Tons)
Centre of Gravity L.C.G. (m)
V.C.G. (m)
Max. F.S.M. (m4)
FWD W.B. TK (P)
130.0 - 154.0
2009.7
2060.0
107.08
12.198
1361
FWD H.F.O BUNKER TK (P)
130.0 - 154.0
2570.1
2395.4
106.80
12.685
758
FWD W.B. TK (S)
130.0 - 154.0
2009.7
2060.0
107.08
12.198
1361
FWD H.F.O BUNKER TK (S)
130.0 - 154.0
2599.4
2368.4
106.88
12.685
745
No. 1 W.B. TK (P)
117.0 - 130.0
6161.4
6315.5
76.63
10.769
10884
AFT H.F.O BUNKER TK (P)
65.0 - 73.0
355.7
327.8
-82.47
17.966
23
No. 1 W.B. TK (S)
117.0 - 130.0
6161.4
6315.5
76.63
10.769
10884
ATF H.F.O BUNKER TK (S)
63.0 - 73.0
465.5
428.9
-83.37
17.965
34
No. 2 W.B. TK (P)
102.0 - 117.0
6367.6
6526.8
36.39
8.903
27780
HFO. SETT. TK (P)
55.0 - 65.0
542.2
499.6
-89.48
18.005
51
No. 2 W.B. TK (S)
102.0 - 117.0
6367.6
6526.8
36.39
8.903
27780
HFO SETT. TK (S)
53.0 - 63.0
537.6
495.4
-91.07
18.063
51
No. 3 W.B. TK (P)
87.0 - 102.0
6459.6
6621.1
-11.57
8.805
28957
LOW SULPHUR FUEL TK (P)
49.0 - 55.0
295.9
272.7
-95.78
18.009
31
No. 3 W.B. TK (S)
87.0 - 102.0
6459.6
6621.1
-11.57
8.805
28957
LOW SULPHUR FUEL TK (S)
49.0 - 53.0
207.6
191.3
-96.70
18.337
20
No. 4 W.B. TK (P)
73.0 - 87.0
5604.5
5744.6
-56.92
9.072
23824
No. 4 W.B. TK (S)
73.0 - 87.0
5604.5
5744.6
-56.92
9.072
23824
A.P. TK
-6.1 - 17.0
2320.6
2378.7
-131.40
14.291
44268
55526.4
56914.6
Total
Total
8-5
7574.0
6979.5
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
Diesel Oil Tanks
Compartment
Location Frame Number
Capacities Volume 100% (m3)
Miscellaneous Tanks
S.G.=0.850 Centre of Gravity
Weight 95% (Tons)
L.C.G. (m)
V.C.G. (m)
Max. F.S.M. (m4)
M.D.O. STOR. TK (S)
45.0 - 49.0
140.7
113.6
-99.90
15.813
20
G / E M.D.O. SERV. TK (S)
45.0 - 49.0
67.1
54.2
-99.90
23.613
20
IGG M.D.O SERV. TK. (P)
45.0 - 50.0
83.9
67.8
-99.50
23.613
26
Total
291.7
Compartment
235.6
Compartment
Location Frame Number
Centre of Gravity
Weight 95% (Tons)
L.C.G. (m)
V.C.G. (m)
32.0 - 37.0
69.9
59.8
-109.94
2.746
102
M.L.O SETT. TK (S)
38.0 - 41.0
106.5
91.1
-105.90
20.461
15
M.L.O STOR. TK (S)
35.0 - 38.0
106.5
91.1
-108.30
20.461
15
M.L.O GRAV. TK (S)
41.0 - 43.0
28.1
2 4.0
-103.90
16.765
5
G/T L.O. SETT. TK (P)
41.0 - 43.0
16.9
1 4.4
-103.90
23.627
1
G/T L.O. STOR. TK (P)
41.0 - 43.0
16.7
1 4.3
-103.90
23.598
1
G/E L.O. SETT. TK (S)
41.0 - 43.0
16.9
1 4.4
-103.90
23.627
1
G/E L.O. STOR. TK (S)
41.0 - 43.0
16.7
1 4.3
-103.90
23.598
1
S/T L.O. SUMP TK (S)
21.0 - 24.0
5.4
4.6
-119.44
2.163
1
383.6
Weight 100% (Tons)
L.C.G. (m)
V.C.G. (m)
Max. F.S.M. (m4)
8.6 - 17.0
70.7
70.7
-125.80
4.916
47
BILGE HOLDING TK
17.0 - 28.0
119.2
119.2
-118.32
1.724
206
H.F.O. OVERFLOW TK
28.0 - 31.0
47.9
47.9
-113.87
2.608
240
OILY BILGE TK
57.0 - 73.0
87.6
87.6
-85.22
8.517
22
CLEAN DRAIN TK
31.0 - 38.0
38.2
38.2
-109.39
2.766
19
SLUDGE TK
33.0 - 41.0
14.0
14.0
-108.12
9.356
9
339.5
339.5
Max. F.S.M. (m4)
M.L.O. SUMP. TK (C)
Total
Volume 100% (m3)
Centre of Gravity
S.G.=0.900
Capacities Volume 100% (m3)
Capacities
C.W.TK
Total Lubricating Oil Tanks
Location Frame Number
S.G.=1.000
327.9
8-6
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA 8.3 Lubrication Oil Chart NO.
EQUIPMENT (MAKER/TYPE)
1
Main Turbine
2
3
4
5
Q'TY
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
1
SYSTEM OIL
MOBIL DTE OIL HEAVY
120
M
2
NASH VACUUM PUMP UNIT
MOBIL GREASE XHP 222
0.1
KG
INITIALLY FILLED
1
TURNING GEAR
MOBILE GEAR 629
10
L
INITIALLY FILLED
1
GLAND CONDENSER
MOBIL GREASE XHP 222
0.05
KG
INITIALLY FILLED
1
CONTROL UNIT RESERVOIR
MOBIL DTE OIL HEAVY
300
L
2
L.O SUMP TANK
MOBILE GARD 412
5,450
L
INITIALLY FILLED
2
GOVERNOR OIL
MOBIL RARUS SHC 1026
4.6
L
INITIALLY FILLED
2
GEAR COUPLING
MOBILE GEAR 636
3
L
2
L.O TANK (TURBINE BED)
MOBIL DTE OIL HEAVY MEDIUM
4800
L
2
GOVERNOR
MOBIL DTE OIL HEAVY MEDIUM
4
L
2
BREATHER PIPE OR SIDE COVER
41.6
L
3
GEAR AND BEARING
60.0
L
3
REMARK OR CHANGE INTERVAL INCL. SUMP TK + GRAV. TK
D/G Engine
GENERATOR TURBINE
G/E STARTING AIR COMPERSSOR
MOBIL RARUS 427 / MOBIL RARUS 827
MOBIL RARUS SHC 1025
CONTROL/WORKING AIR COMPRESSOR
MOBIL RARUS 827 TO BE USED AFTER RUNNING IN ABOUT 300HRS
INITIAL FILLING BY ATLAS COPCO OIL OTHER OIL USED AFTER TAKING FOLLOWING PRECAUTIONS. - THE PREVIOUS USED OIL SHOULD FIRST BE DRAINED AND
3
MOTOR BEARING
MOBIL GREASE XHP 222
LITTLE
L
THE SYSTEM FLUSHED. - THE OIL FILTER SHOULD BE REPLACED.
BOILER FEET
6
ACCESSORIES
2
BOILER FEET
MOBIL GREASE XHP 222
0.08
KG
8
CHECK VALVE(1B, 4B, 11B, 12B)
MOBIL GREASE XHP 222
0.4
KG
4
GLOBE/ANGLE VALVE(3B, 13B)
MOBIL GREASE XHP 222
0.2
KG
2
G. CHECK VALVE(71B)
MOBILUX EP 0
3.5
KG
2
ANGLE VALVE(131B)
MOBILUX EP 0
3
KG
2
GATE VALVE(132B)
MOBIL GREASE XHP 222
0.2
KG
2
G. CHECK VALVE(141B, 145B)
MOBIL GREASE XHP 222
0.4
KG
2
GEAR MOTOR
MOBILUX EP 0
1
KG
VALVES
LONG RETRACTABLE TYPE SOOT BLOWER
8-7
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
TRIGGER PIN & GEAR
MOBIL GREASE XHP 222
0.4
KG
TRAVELLING HEAD & FEED SCREW
MOBILUX EP 0
1.6
KG
GEAR & CHAIN
MOBIL GREASE XHP 222
1.6
KG
REDUCTION GEAR
MOBIL TEMP SHC 100
9.6
KG
COUPLING
MOBIL GREASE XHP 222
2.1
KG
INLET VANE CONTROL LEVER
MOBIL GREASE XHP 222
0.06
KG
BEARING
MOBIL GREASE XHP 222
0.5
KG
BEARING
MOBIL GREASE XHP 222
0.12
KG
DAMPER BEARING
MOBIL GREASE XHP 222
0.04
KG
WORM-GEAR ROD
MOBIL GREASE XHP 222
0.01
KG
CHEMICAL INJECTION EQUIP.
PUMP CASE
MOBIL DTE OIL HEAVY
8.4
L
N2H4 INJECTION EQUIP.
PUMP CASE
MOBIL DTE OIL HEAVY
8.4
L
2
GREASE CASE
CASTROL SPHEEROL SX2
9
KG
2
F.O RESERVOIR
ETHYLENE GLYCOL
5
L
1
SEAT POT FOR VALVE (232B-P, S)
ETHYLENE GLYCOL
3.60
L
6
SEAT POT FOR VALVE (232B)
ETHYLENE GLYCOL
5
L
M.D.O
1
SPINDLE
MOBIL GEAR 629
6.3
L
INITIALLY FILLED (CPL 100)
MAIN L.O
2
SPINDLE
MOBIL GEAR 629
12.6
L
INITIALLY FILLED (CPL 100)
2
L.O TANK
MOBIL DTE OIL HEAVY MEDIUM
760
L
2
GOVERNOR
MOBIL DTE OIL HEAVY MEDIUM
2.0
L
EQUIPMENT (MAKER/TYPE)
Q'TY
LONG RETRACTABLE TYPE SOOT BLOWER
ROTARY TYPE SOOT BLOWER
FORCED DRAFT FAN
FUEL OIL PUMP 6
ACCESSORIES AIR DUCT DAMPER
FEED WATER MOTOR VLAVE
7
8
PURIFIER
BOILER F.W. PUMP TRUBINE
8-8
REMARK OR CHANGE INTERVAL
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
9
Q'TY
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
REMARK OR CHANGE INTERVAL
MAIN & AUX S.W CIRC. P/P
2
PUMP COUPLING SIDE BEARING
MOBIL GREASE XHP 222
0.5
KG
INITIALLY FILLED
MAIN CONDENSATE PUMP
2
PUMP COUPLING SIDE BEARING
MOBIL GREASE XHP 222
0.1
KG
INITIALLY FILLED
CONDENSATE DRAIN PUMP
3
PUMP COUPLING SIDE BEARING
MOBIL GREASE XHP 222
0.1
KG
INITIALLY FILLED
DUMP DRAIN PUMP
1
PUMP COUPLING SIDE BEARING
MOBIL GREASE XHP 222
0.1
KG
INITIALLY FILLED
1
PUMP COUPLING SIDE BEARING
MOBIL GREASE XHP 222
0.1
KG
INITIALLY FILLED
PUMP END SIDE BEARING
MOBIL GREASE XHP 222
0.1
KG
INITIALLY FILLED
PUMP SIDE GEAR COUPLING
MOBIL GEAR 636
0.2
L
EQUIPMENT (MAKER/TYPE)
E/R CENT. PUMP
WATER SPRAY PUMP
BALLAST PUMP
3
PUMP COUPLING SIDE BEARING
MOBIL GREASE XHP 222
0.3
KG
COLD START BOILER F.W. PUMP
1
CRANK CASE
MOBIL DTE OIL HEAVY MEDIUM
0.1
L
1
COUNTER / CRANK SHAFT BEARING
MOBIL GREASE XHP 222
0.1
KG
OIL BOX OR GEAR CASE
MOBIL DTE OIL HEAVY MEDIUM
0.3
L
INITIALLY FILLED
INITIALLY FILLED
E/R BILGE PUMP
10
11
E/R GEAR PUMP
H.F.O. TRANS. PUMP
1
OILER
MOBIL DTE OIL HEAVY MEDIUM
0.3
L
WASTE OIL TRANS PUMP
1
GREASE POINT
MOBIL GREASE XHP 222
0.2
KG
M.D.O. TRANS. PUMP
1
OILER
MOBIL DTE OIL HEAVY MEDIUM
1.2
L
GREASE POINT
MOBIL GREASE XHP 222
0.3
KG
1
OILER
MOBIL DTE OIL HEAVY MEDIUM
0.3
L
1
GREASE POINT
MOBIL GREASE XHP 222
0.1
KG
OILY BILGE PUMP
1
GREASE POINT
MOBIL GREASE XHP 222
0.2
KG
FO ADDITIVE PUMP
1
OILER
MOBIL DTE OIL HEAVY MEDIUM
0.3
L
M.D.O. PUIR. SUPPLY PUMP
1
OILER
MOBIL DTE OIL HEAVY MEDIUM
0.3
L
1
GREASE POINT
MOBIL GREASE XHP 222
0.1
KG
1
WO PUMP GEAR BOX
MOBIL GEAR 630
0.3
L
1
MILL PUMP SEAL BOX
MOBIL DTE 16M
0.7
L
INCIN. MDO SERVICE PUMP
INCINERATOR
8-9
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
12
13
14
15
Q'TY
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
REMARK OR CHANGE INTERVAL
PURI. ROOM EXH. FAN
1
GREASE NIPPLE FOR SHAFT BEARING
MOBILITH SHC 460
0.2
KG
INITIALLY FILLED
D/G ROOM EXH. FAN
1
GREASE NIPPLE FOR SHAFT BEARING
MOBILITH SHC 460
0.2
KG
INITIALLY FILLED
E/R FAN
6
GREASE NIPPLE FOR SHAFT BEARING
MOBILITH SHC 460
1.8
KG
INITIALLY FILLED
2
COMPRESSED CRANK CASE
MOBIL ARCTIC EAL 100
60
L
FOR WORKSHOP
1
COMPRESSOR CRANK CASE
MOBIL ARCTIC EAL 32
7.6
L
INITIALLY FILLED
FOE BOILER TEST ROOM
1
COMPRESSOR CRANK CASE
MOBIL ARCTIC EAL 32
1
L
INITIALLY FILLED
1
HEAR STOCK & GEAR BOX
MOBIL DTE 13M
10
L
INITIALLY FILLED
APRON AND ETC.
MOBIL DTE 13M
2
L
INITIALLY FILLED
1
COLUMN SIDE, SPINDLE & TABLE / HEAR GEAR BOX
MOBIL DTE 13M
3
L
INITIALLY FILLED
1
COLUMN GEAR
MOBIL GREASE XHP 222
0.2
KG
INITIALLY FILLED
1
SLEEVE, BAND GEAR BOX & SPINDLE
MOBIL DTE 13M
0.3
L
INITIALLY FILLED
1
COLUMN GEAR
MOBIL GREASE XHP 222
0.2
KG
INITIALLY FILLED
HYD. PIPE BENDER
1
OIL TANK
MOBIL DTE 13M
11.0
L
INITIALLY FILLED
PIPE THREADING MACHINE
1
GEAR BOX, SHAFT
MOBIL GREASE XHP 222
0.2
KG
INITIALLY FILLED
FRAME / GEAR COVER, ROD & HYDRO. PUMP
MOBIL DTE 13M
0.3
L
INITIALLY FILLED
1
MOBIL DTE 16M
0.2
L
INITIALLY FILLED
MAIN L.O. SYSTEM
MOBIL DELVAC 1 /5W-40
114
L
W / W GOVERNOR
MOBIL DELVAC 1 /5W-40
3
L
INITIALLY FILLED
HYDRAULIC STARTER
MOBIL DTE 11M
30
L
INITIALLY FILLED
EQUIPMENT (MAKER/TYPE)
E/R FAN
MSBD / ECR AIR COND. PLANT
UNIT COOLER
LATHE
DRILLING MACHINE
BENCH DRILLING MACHINE 16
WORKSHOP MACHINERTY
BAND SAWING MACHINE
17
EM’CY GENERATOR
1
MAIN GENERATOR FOR D/G
2
SLEEVE BEARING
MOBILGRAD 412
2
L/MIN
MAIN GENERATOR FOR T/G
2
SLEEVE BEARING
MOBIL DTE OIL HEAVY MEDIUM
4
L/MIN
18
8 - 10
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
19
Q'TY
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
FOR MAIN & AUX S.W. CIRC. P/P
2
BOTTOM SIDE / TOP SIDE
MOBIL GREASE XHP 222
0.9 / 1.3
KG
FOR EM’CY FIRE PUMP
1
BOTTOM SIDE / TOP SIDE
MOBIL GREASE XHP 222
0.2 / 0.3
KG
FOR WATER SPRAY PUMP
1
BOTTOM SIDE / TOP SIDE
MOBIL GREASE XHP 222
0.2 / 0.3
KG
FOR BALLAST PUMP
3
BOTTOM SIDE / TOP SIDE
MOBIL GREASE XHP 222
0.5 / 1
KG
FOR BOILER F.W PUMP
1
DE SIDE / NDE SIDE
MOBIL GREASE XHP 222
0.1 / 0.1
KG
DE SIDE / NDE SIDE
MOBIL GREASE XHP 222
A LITTLE
KG
PUMP, SYLINDER & PIPE
MOBIL SHC 536
3860
L
HYD. OIL STORAGE TANK
MOBIL SHC 536
3000
L
EQUIPMENT (MAKER/TYPE)
ELECTRIC MOTOR
FOR OTHER CENT. PUMPS
20
STEERING GEAR
1
21
PROPELLER BONNET
1
BONNET INSIDE
MOBIL GREASE XHP 222
220
KG
22
INTER. SHAFT BEARING
2
BERATING & OIL BATH
MOBIL DTE OIL HEAVY
60
L
FWD / AFT SEAL CHAMBER
MOBIL DTE OIL HEAVY
10
L
FWD SEAL TANK
MOBIL DTE OIL HEAVY
15
L
PIPE LINE
MOBIL DTE OIL HEAVY
20
L
STERN TUBE INSIDE
MOBIL DTE OIL HEAVY
1650
L
S/T L.O. TANK
MOBIL DTE OIL HEAVY
180
L
S/T L.O. SUMP. TANK
MOBIL DTE OIL HEAVY
5,400
L
PIPE LINE
MOBIL DTE OIL HEAVY
100
L
23
24
STERN TUBE SEAL (AFT & FWD)
STERN TUBE BEARING & SYSTEM
REMARK OR CHANGE INTERVAL
1
1
25
HYD. NUT FOR PROP. SHAFT
1
HYD. POWER PUMP
MOBIL DTE 13M
18
L
26
MAIN AIR COND. PLANT
2
COMPRESSOR CRANK CASE
MOBIL ARCTIC EAL 100
150
L
27
AUX. AIR COND. PLANT
2
COMPRESSOR CRANK CASE
MOBIL ARCTIC EAL 100
65
L
28
PROV. REF. PLANT
2
COMPRESSOR CRANK CASE
MOBIL ARCTIC EAL 68
12
L
8 - 11
INITIALLY FILLED
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
29
EQUIPMENT (MAKER/TYPE)
CATGO & BALLAST VALVE, REMOTE CONTROL SYSTEM
BALLAST / FO / BILGE / SHIPSIDE SIDE
31
32
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT
UNIT
REMARK OR CHANGE INTERVAL
1
GEAR CASE OFTRACTION
MOBIL GEAR 630
6.0
L
INITIALLY FILLED
GUIDE RAILS
MOBIL DTE 13M
2
L
INITIALLY FILLED
MOBIL GREASE XHP 222
0.3
KG
INITIALLY FILLED
CAGE DOOR & SAFETY DEVICE
MOBIL DTE 13M
2
L
INITIALLY FILLED
GOVERNOR & GOV. TENSION SHEAVE
MOBIL DTE 13M
2
L
INITIALLY FILLED
AROUND ENTRANCE DOOR
MOBIL DTE 13M
2
L
INITIALLY FILLED
1
HYD. POWER PACK
MOBIL AERO HF
1,000
L
1
ACCUMULATOR UNIT FOR POWER UNIT
MOBIL AERO HF
280
L
3
ACCUMULATOR FOR ESD VALVE
MOBIL AERO HF
92
L
8
SOLENOID VALVE BOX
MOBIL AERO HF
60
L
2
HAND PUMP
MOBIL AERO HF
13
L
HYD PIPE LINE
MOBIL AERO HF
1,228
L
1
HYD. POWER PACK
MOBIL AERO HF
1,000
L
1
ACCUMULATOR UNIT FOR POWER UNIT
MOBIL AERO HF
5
L
1
SOLENOID VALVE BOX
MOBIL AERO HF
2
L
1
SOLENOID VALVE BOX
MOBIL AERO HF
2.5
L
9 / 64
HAND PUMP / ACTUATOR
MOBIL AERO HF
13
L
HYD PIPE LINE
MOBIL AERO HF
1,264
L
4
STEAM HEATER
MOBIL THERM 603
1,680
L
MAKER : BP
4
GEAR BOX BEARINGS
MOBIL DTE 846
28.0
L
MAKER : BP
2
HD MOTOR
MOBIL DTE 16M
12.0
L
2
LD MOTOR
MOBIL DTE 16M
9.0
L
2
SCREW AIR COMPRESSOR OIL SUMP.
MOBIL RARUS SHC 1025
68
L
BEARING
CREW ELEVATOR
CARGO VALVE
30
Q'TY
HD / LD CARGO COMP.
N2 GENERATOR
PARTSOF TRACTION MACH.
8 - 12
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
33
34
35
EQUIPMENT (MAKER/TYPE)
Q'TY
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
8
HYD. ACTUATOR CYLINDER (HQ25)
MOBIL DTE 11M
1
L
1
HYD. ACTUATOR CYLINDER (HQ50)
MOBIL DTE 11M
3
L
6
HYD. ACTUATOR CYLINDER (ACTO200)
MOBIL DTE 11M
2
L
19
HYD. ACTUATOR CYLINDER (ACTO400)
MOBIL DTE 11M
18.5
L
5
HYD. ACTUATOR CYLINDER (ACTO800)
MOBIL DTE 11M
10.2
L
1
HYD. ACTUATOR CYLINDER (ACTO1600)
MOBIL DTE 11M
4.3
L
5
TRANSMITTER
MOBIL DTE 13M
6.5
L
5
ACTUATOR
MOBIL DTE 13M
2.0
L
PIPE
MOBIL DTE 13M
12.0
L
REMARK OR CHANGE INTERVAL
CRYOGENIC BALL VALVE
CRYOGENIC B / F VALVE
MANUAL HYD. OPERATING UNIT
36
FWD H.F.O. TRANS. PUMP
1
OILER
MOBIL DTE OIL HEAVY MEDIUM
0.3
L
37
HOLD BILGE PUMP
7
OILER
MOBIL DTE 13M
1.4
L
2
AIR BLOWER MOTOR
MOBIL GREASE XHP 222
0.1
KG
2
AIR BLOWER
MOBIL DTE BB
8.0
L
F.O.P. MOTOR
MOBIL GREASE XHP 222
0.04
KG
1
COMP. FOR IG CHILLER UNIT
MOBIL ARCTIC EAL 100
50.0
L
1
GLYCOL CIRC. PUMP IG CHILLER
MOBIL GREASE XHP 222
0.04
KG
1
FAN FOR IG DRYER
MOBIL GREASE XHP 222
0.04
KG
DRIVING RECUCER
MOBIL SHC 630
6.0
L
INITIALLY FILLED
AIR UNIT
MOBIL SHC 524
0.2
L
NITIALLY FILLED
GREASE POINT
MOBILITH SHC 460
0.5
KG
NITIALLY FILLED
38
INERT GAS GENERATOR
INITIALLY FILLED
1 39
EM’CY TOWING SYSTEM 2
8 - 13
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
EQUIPMENT (MAKER/TYPE)
WINDLASS (W1, W2)
40
SERVO PUMP UNIT
42
43
44
BOW THRUSTER
VENT FAN
ACCOMMODATION LADDER
PILOT LADDER REEL
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
REMARK OR CHANGE INTERVAL
ENCLOSED GEAR
MOBIL SHC 632
180
KG
INITIALLY FILLED
MOBILITH SHC 460
12
KG
INITIALLY FILLED
CLOSED GEAR
MOBIL SHC 632
130
L
HYDRAULICS AND PIPES
MOBIL SHC 526
630
L
CLOSED GEAR
MOBIL SHC 632
1,029
KG
MOBILITH SHC 460
42
KG
CLOSED GEAR
MOBIL SHC 632
1,029
L
HYDRAULICS AND PIPES
MOBIL SHC 526
1,155
L
OIL TANK
MOBIL DTE 11M
78
L
HEADTANK
MOBIL SHC 626
960
L
PIPES
MOBIL SHC 626
120
L
SIDE OF COUPLING CASING
MOBILGREASE XHP 222
2
KG
THRUSTER MOTOR
MOBILGREASE XHP 222
0.3
KG
INITIALLY FILLED
(LIFTING POST) ELEC. MOTOR ROOM FAN
MOBILITH SHC 460
0.2
KG
INITIALLY FILLED
CARGO COMP. ROOM FAN
MOBILITH SHC 460
0.2
KG
INITIALLY FILLED
PIPE DUCT FAN
MOBILITH SHC 460
0.2
KG
INITIALLY FILLED
PASSAGE WAY FAN
MOBILITH SHC 460
0.2
KG
INITIALLY FILLED
HOSTING WINCH
MOBIL SHC 630
6
L
AIR MOTOR FOR HOISTING
MOBIL SHC 524
0.3
L
WIRE ROPE
MOBILARMA 798
20
KG
GREASE POINT
MOBILITH SHC 460
10
KG
ROPE LADDER HOISTING
MOBIL SHC 630
3
L
AIR MOTOR FOR HOISTING
MOBIL SHC 524
0.3
L
GREASE
NIPPLE
2
DECK MACHINERY
MOORING WINCH (M1 – M7)
41
Q'TY
GREASE
NIPPLE
INITIALLY FILLED
7
1
1
1
2
2
8 - 14
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
45
46
47
48
EQUIPMENT (MAKER/TYPE)
LIFE BOAT DAVIT & WINCH
HOSE HANDLING CRANE
PROVISION CRANE (PORT & STBD SIDE)
EM’CY CARGO PUMP HANDLING UNIT
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
ENCLOSED GEAR
MOBIL SHC 630
44
L
WIRE ROPE
MOBILARMA 798
10
KG
BEARINGS
MOBILITH SHC 460
4
KG
2
HYDRAULIC OIL ON SYSTEM
MOBIL DTE 13M
1,800
L
4
SLEW GEAR BOX OIL
MOBIL SHC 630
40
L
INITIALLY FILLED
2
WINCH GEAR BOX OIL
MOBIL SHC 630
5.0
L
INITIALLY FILLED
-
WIRE ROPE
MOBILARMA 798
20.0
KG
INITIALLY FILLED
-
ROLLER / BALL BEARING
MOBILITH GREASE XHP 222
20.0
KG
INITIALLY FILLED
-
PLAIN BEARING BROZE
MOBILITH GREASE XHP 222
10.0
KG
INITIALLY FILLED
-
OPEN GEAR
MOBILITH 375 NC
10
KG
INITIALLY FILLED
2
HYDRAULIC OIL ON SYSTEM
MOBIL DTE 13M
1,000
L
4
SLEW GEAR BOX OIL
MOBIL SHC 630
28.0
L
INITIALLY FILLED
2
WINCH GEAR BOX OIL
MOBIL SHC 630
3.0
L
INITIALLY FILLED
-
WIRE ROPE
MOBILARMA 798
20.0
KG
INITIALLY FILLED
-
ROLLER / BALL BEARING
MOBILITH GREASE XHP 222
20.0
KG
INITIALLY FILLED
-
PLAIN BEARING BROZE
MOBILITH GREASE XHP 222
10.0
KG
INITIALLY FILLED
-
OPEN GEAR
MOBILITH GREASE XHP 222
10
KG
INITIALLY FILLED
AIR WINCH
MOBIL SHC 630
3
L
INITIALLY FILLED
HOISTING ROPE
MOBILARMA 798
5
KG
INITIALLY FILLED
BEARING
MOBILITH SHC 460
4
KG
FILTER & OILER UNIT
MOBIL DTE 13M
0.4
L
GEAR BOX FOR REDUCER
MOBIL SHC 630
60
L
MOTOR BEARING
MOBILITH SHC 460
0. 8
KG
OILER SET
MOBIL SHC 524
2.8
L
Q'TY
2
REMARK OR CHANGE INTERVAL
INITIALLY FILLED
2
INITIALLY FILLED
4 49
CAPSTAN 1
8 - 15
Part 8 General Information
Machinery Operating Manual
LNGC GRACE ACACIA
NO.
EQUIPMENT (MAKER/TYPE)
Q'TY
APPLICATION POINT
KIND OF LUB. OIL
AMOUNT (PER SET)
UNIT
GEAR BOX FOR REDUCER
MOBIL SHC 630
4.6
L
MOTOR BEARING
MOBILITH SHC 460
0.4
KG
OILER SET
MOBIL SHC 524
1.4
L
WINCH GEAR BOX
MOBIL SHC 630
1
L
FALL WIRE ROPE
MOBILARMA 798
2.0
KG
MOTOR BEARING
MOBILITH SHC 460
0.4
KG
OILER SET
MOBIL DTE 13M
1.4
L
ENGINE OIL
MOBIL DELVC 1/5W-40
7.0
L
GEAR BOX
MOBIL DELVC 1/5W-40
2.2
L
STERN TUBE
MOBIL DET OIL HEAVY
0.2
KG
REMARK OR CHANGE INTERVAL
2 50
FIRE WIRE REEL 1
51
52
REMEDY HANDLING DAVIT & PORTABLE DAVIT
LIFE BOAT
2
2
8 - 16
Part 8 General Information
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