135MW CFBC Operation Manual 1(20080306)

VSLP 1×135MW POWER PLANT RAJASTHAN PROJEDCT Client: SEPCOⅢ ELECTRIC POWER CONSTRUCTION CORPORATION No.

26-W9-YX-01

Total 151 Pages

TURBINE OPERATION RULES (A)

Operation Instruction

SEPCOIII

Drafted by: Reviewed by:

Approved by:

Name of Change Sheet 1 2 3

No.

Time of Approval

TURBINE OPERATION RULES

CONTENTS PART 1 Overview Chapter 1 Specification of Main Equipment ………………………………………………5 Chapter 2 Specification of Auxiliary Equipment ………………………………………… 14 PART 2 Unit Start-up Chapter 1 Cold Start of the Unit ……………………………………………….…………26 Chapter 2 Warm & Hot Start of the Unit ………………………………………….…..…38 PART 3 Unit Operation Chapter 1 Operating Parameters of Steam Turbine …………………………………… 42 Chapter 2 Operating Modes of the Unit …………………………………………..……..47 Chapter 3 Regular Works and Requirements …………………………………..………49 PART 4 Unit Shutdown PART 5 Treatment of Unit Accidents Chapter 1 Treating Rules of Accidents …………………………………………………..60 Chapter 2 Condition of Steam Turbine Tripping …………………………………...…… 61 Chapter 3 Condition of Unit Fault Shutdown ……………………………………………61 Chapter 4 Condition of Emergency Shutdown………………………………….…….…62 Chapter 5 Procedure of Emergency Shutdown...…………………………….…………63 Chapter 6 Procedure of Unit Fault Shutdown ………………………………….….……63 Chapter 7 Decreasing of Vacuum …………………………………………………..……64 Chapter 8 Water Hammer of Steam Turbine ……………………………………………65 Chapter 9 Increasing of Axial Displacement ……………………………………....……66 Chapter 10 Steam Turbine Oil System Catching Fire ……………………………....…67 Chapter 11 Abnormity of Steam Conditions ………………………………………….…68 Chapter 12 DEH Failure …………………………………………………………….……71 Chapter 13 Abnormity of Steam Turbine Lubricating Oil System ……………………71 Chapter 14 Abnormal Vibration of the Unit ……………………………………….……75 -2-

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Chapter 15 Generator parallels off, while turbine does not trip ……………..….……77 Chapter 16 Generator parallels off, and turbine trips …………………………………77 Chapter 17 Turbine trips, while the generator does not parallel off …………………78 Chapter 18 Failure of Thermodynamic Power Supply …………………………………78 Chapter 19 High Bearing Temperature of Turbine-generator Unit ……………………79 Chapter 20 Burning out of Turbine-generator Bearing Bush ……………………….…79 Chapter 21 Steam Turbine Shaft Bending ………………………………………………80 Chapter 22 Steam turbine Overspeed ………………………………………………..…82 Chapter 23 Feed water pump set outlet check valve is untight and rotates reversely.83 Chapter 24 Turbine-generator unit operates at abnormal frequency ………………… 83 Chapter 25 Boiler Fire Extinction …………………………………………………………84 Chapter 26 Treatment of Accidents & Abnormity of the Motor ………………………..85 PART 6 Auxiliary Equipment & Common Service System Chapter 1 General Operating Rules of Auxiliary Equipment……………………..…… 89 Chapter 2 Industrial Water System……………………………………………………….92 Chapter 3 Oil Purification System of Steam Turbine……………………………………94 Chapter 4 Lubricating Oil System of Steam Turbine …………………………………… 98 Chapter 5 Circulating Water System ……………………………………………..…….102 Chapter 6 Shaft Sealing and Vacuum System of Steam Turbine ……………..…….108 Chapter 7 Condensate Water System ………………………………………..………..111 Chapter 8 Feed Water Deaerating System ……………………………………..…….117 Chapter 9 DEH System …………………………………………………………..……..131 Chapter 10 Bypass System ……………………………………………………..………136 Chapter 11 Turbine Proper Water Drain System ……………………………..………138 Chapter 12 Quick Cooling System of Steam Turbine ………………………..………139 Chapter 13Air Cooling System …………………………………..………143

Appendix 1: Comparison Table of the Temperature & Pressure of Saturated Water & Steam ………………………………………………………………………………….......147 -3-

TURBINE OPERATION RULES

PART 1: Overview

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TURBINE OPERATION RULES

Chapter 1 Specification of Main Equipment 1.1 Specification of steam turbine equipment Model: N135-13.2/535/535 Type: super-high pressure, primary reheating, double cylinder, double-flow, single shaft, extraction and condensing steam. Rated power: 135MW Initial steam pressure: 13.24Mpa (a) Initial steam temperature: 535℃ Reheat steam temperature: 535℃ Exhaust pressure: 5.4kPa (a) Rated speed: 3,000r/min Rotating direction: clockwise (as viewed from the governor side to generator) Manufactured by: Shanghai Turbine Co., Ltd.

1.2 Main technique parameters Max power:

146.822MW

Rated power:

135MW

Rated pressure of the steam before initial steam stop valve:

13.24mpa (a)

Rated temperature of the steam before initial steam stop valve: Rated pressure of the steam before reheat steam valve:

535 ℃

2.238mpa (a)

Rated temperature of the steam before reheat steam valve: 535℃ Rated cooling water temperature: 24℃ Rated backpressure:5.4kpa (a) Rated speed:

3,000 rpm

Feed water temperature under rated condition: 244.4℃ Max back pressure at which the unit is permitted to operate: 18.6kpa (a) Regeneration stages: 2 HP heaters, 4 LP heaters & 1 deaerator Length of the last blade of LP cylinder: 660mm Critical speed of shafting: 1850r/min for HP & MP rotor -5-

TURBINE OPERATION RULES

2116r/min for LP rotor 1290r/min for generator rotor Stages of flow path: total 39 stages: HP cylinder: 1 governing stage + 8 pressure stages MP cylinder: 10pressure stages LP cylinder: 2×6 pressure stages

1.3 Description of turbine characteristics 1.3.1 This unit can carry the base load of power network, as well as can be used as two-shift or peak regulation unit. 1.3.2 This unit’s operating time at no load when rejecting load must not exceed 15 mins. 1.3.3 This unit’s operating time without steam must not exceed 1 min. 1.3.4 This unit’s idle time with full vacuum after trip is about 45 mins and that without vacuum is about 15 mins. 1.3.5 This unit’s blades can run safely at the grid frequency of 47.5~51.5hz for long; the unit’s characteristics also meet the requirements as follows: Permitted Operating Time

Frequency (Hz)

Accumulated (min)

Every Time (Sec)

52.5

>5

>5

52.0

>30

>30

47.5~51.5

Continuous Operation

47

>60

>60

46.5

>10

>10

46

>2

>2

1.3.6 The peak to peak vibration amplitude measured near the bearing journal of turbine shall be ≤ 0.075mm during normal operation, which shall not exceed 0.25mm as critical speed passing in speed rise; 1.3.7 The power load of the unit is permitted to reach 135MW when the HP heaters are cleared; 1.3.8 The unit is permitted to run continuously with low load when the exhaust pressure of turbine increases to 0.0146Mpa (a). The alarm back pressure of turbine is 16.9kPa (a) and trip back pressure is 20.3kPa (a). 1.3.9 The unit is permitted to run for long when the exhaust temperature of steam turbine is less than 79℃. The max temperature at which exhaust is permitted to operate is 120℃. 1.3.10 Permitted load variation rate of unit is: 1.3.10.1 From 100% to 50% MCR

5%/min

1.3.10.2 From 50% to 20% MCR and from 20% to 50% MCR 3%/min

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TURBINE OPERATION RULES

1.3.10.3 Below 20%MCR

2%/min

1.3.11 The pressure after the governing stage must not exceed 10.34Mpa (a) at different working conditions.

1.4 General description of steam turbine 1.4.1 Brief introduction of steam turbine proper 1.4.1.1 Steam turbine type is: super-high pressure, primary reheating, double-flow and single shaft arrangement, reaction extraction and condensing type, which characteristics include: combination of HP and IP cylinder, reverse arrangement of through-flow parts, inlets of initial steam and reheat steam centered on the middle part of HP & MP cylinder and radial diffusion double-flow type of LP cylinder. This unit’s shafting is supported by three points: HP & MP rotor connected with LP rotor by rigid coupling while the LP rotor connected with the generator rotor by semi-flexible coupling, generator rotor expands and contracts forwards and backwards with the thrusting bearing in middle bearing pedestal as the dead point, and HP & MP cylinder expands forwards based on the cross point of longitudinal and traverse key of the middle bearing pedestal. There is an absolute expansion indicator on the front bearing frame with total cylinder expansion of 20-22mm. and the LP outer cylinder expands backward with the cross point of the longitudinal and traverse key in the front of the LP outer cylinder as the dead point.

HP Governing Valves Layout Generator End Upper Half

Lower Half MainStopValve(L)

MainStopValve(R)

Governing Valve End The turbine unit is 14 meters long in total and arranged on the 9m operation floor, with a combination of HP initial steam stop valve and HP governing valve mounted on both sides in the

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TURBINE OPERATION RULES

front which is supported on the holder of main stop valve, 4 flexible HP steam inlet pipes connected with the 4 governing valves and the HP cylinder’s upper and lower steam inlets respectively, and governing valve controlled by oil servo-motor. The high pressure nozzle section consists of four groups of nozzle segments, The unit can reach rated power by 3 valves opening fully and the fourth group provides guarantee for the availability of rated power in summer and at low parameters. HP & MP cylinder is double-floor cylinder with 1 governing stage and 8 pressure stages in the HP part. There is a section of steam extraction led to HP heater #1 after stage 7, and steam exhausted by HP flows through lower cylinder’s exhaust port and HP exhaust check valve to the reheater, a portion of which is led to HP heater #2 as regenerative extraction. The reheated steam flows to MP part via MP combined valve through two rigid steam inlet pipes. There are 10 pressure stages in MP part with a third stage extraction to deaerator after stage6 and a fourth extraction led to LP heater #4 after stage 8. For MP exhaust part, the upper half is designed to exhaust steam upwards that flows into LP cylinder through 2 flexible cross over pipes with compensation capacity; the lower half has a fifth extraction led to LP heater #5. The LP cylinder is double flow and has 2×6 stages, there are a 6th and 7th extraction openings set in LP cylinder that lead extraction to LP heater #6 and LP heater #7 (built-in type) inside the condenser respectively and led out after the stage 3 and stage 6 respectively. This steam turbine has three bearing pedestals in all, in which 3 turbine journal bearings, 1 generator front bearing and 1 thrust bearing are mounted. All bearing pedestals are floor mounted. Besides journal bearing in bearing pedestal #1, there are also main governing set, including main oil pump and emergency governor etc. Two MP combined valves are arranged on the left and right side in the middle of the unit respectively, which may move freely on its bearing surface with expansion of the turbine, the MP governing valve only operates for regulation at below 30% load and opens fully not to take part in regulation in the case where the load is more than 30%. The rotary equipment of steam turbine rotor is mounted on the back bearing pedestal and driven by motor after speed reduction, rotor turning gear speed rotation is 7~8r/min, each bearing is equipped with HP jacking oil system in order to lower the start-up power of rotary equipment and protect all bearings from damage. LP cylinder is equipped with atomizing nozzle type low-load spray regulator inside that may operate to spray automatically in the case where the LP cylinder exhaust temperature is higher than 80℃ so as to ensure normal operation of the unit. 1.4.1.2 Sliding key system The sliding key system is the supporting and locating system of stator part, the steam turbine proper supporting and locating mode is: front frame, middle frame and rear frame and exhaust hood frame are fastened on the foundation by means of foundation bolts and back grouting and

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TURBINE OPERATION RULES

are equipped with front bearing pedestal, middle bearing pedestal, rear bearing pedestal and LP outer cylinder thereon respectively. Longitudinal keys are arranged on the front frame along the center axis, the front bearing pedestal can move on its frame along the axis. HP & MP outer cylinder upper claws are supported on the front and middle bearing pedestal, the lower claw’s transverse keys connect with the front and middle bearing pedestal, besides longitudinal keys, there are also transverse keys on some position of the middle frame, and the cross point of longitudinal and transverse key is the dead point of HP & MP stator part, the front bearing pedestal HP and MP cylinder and middle bearing pedestal take this as the dead point to perform axial expansion and contraction. There is a vertical key mounted on both upside and downside of both ends of HP & MP outer cylinder with key way plate fixed on the neighboring bearing pedestal for the purpose of smooth expansion and contraction and keeping cylinder center aligning. 1.4.1.3 Thrust bearing The unit adopts the Michell thrust bearing. The thrust collar integrates with steam turbine, and both its front and back sides are mounted with positive and negative thrust bearing pads with 12 pieces laid on the whole circle of each. And each pad is equipped with a RTD temperature measuring device for measuring its metal temperature. The back of thrust bearing pad rests on erection loop, and erection loop leans against the spheric seating, which gives self alignment effect. Positive or negative thrust of steam turbine bearing operates on the operating pad or nonoperating pad separately, and the bearing displacement on thrust pad shall not be more than 0.4mm. The lubricating oil enters between thrust collar and thrust pad via oil inlets on both sides for lubricating, and then flows out from thrust collar outer side, the return oil escapes from the top, and there are two return oil adjusting screws mounted on return oil outlet, which can adjust the oil return quantity to control return oil temperature. 1.4.1.4 Journal bearing This unit adopts elliptic type journal bearing, which consists of a bearing bush cast with Babbitt metal, bearing shell and spheric seating. The bearing is made into upper and lower, two halves that are fixed and positioned by screws and taper pins, the bearing case matches with spheric seating on spherical surface, which gives self alignment effect, and there are four set pieces on the spheric seating for the use of adjustment. Lubricating oil flows into bearing through a hole at lower part of bearing and then flows into bearing pedestal via the bearing end. There is a platinum resistor mounted on the bearing bush that can measure the bearing metal temperature, there is oil from return chute in the bore of locating pin in upper bearing half, which temperature can be measured as that of bearing return oil, and there is HP jacking oil hold at the bottom of bearing bush. 1.4.1.5 Shafting The steam turbine proper shafting consists of HP & MP rotor and LP rotor. Connection between HP & MP rotor and LP rotor relies on the rigid coupling integrated with main shaft forging, and the shims in between two halves of coupling are connected with screws. As configured for the

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TURBINE OPERATION RULES

purpose of meeting the requirement of rotor center aligning in assembly, in such a case, the center on both ends of coupling must keep correct and concordant in assembly so as to allow the rotor center line to become smooth and continuous curve in operation. The rigid coupling is very sensitive to the bearing load distribution because of high rigidity, thus its requirements for the assembly technology and shafting aligning are much higher, but it has such advantages as high strength, short rotor length, easy processing and reliable operation. Semiflexible coupling is used in between LP rotor and generator rotor, such coupling has a corrugated pipe joint on the end coupling connecting with generator rotor, which has certain flexibility, and connects with an minor axis on the other end coupling, and the minor axis covers the generator rotor to transmit the torque by means of interference and key, such semiflexible coupling may allow the unit safety operation not to be affected by slight change in the steam turbine and generator center in installation and operation. 1.4.2 Technical specifications of governing system 1.4.2.1 The governing system is able to keep idle running of steam turbine at rated steam inlet condition, rated vacuum and full open main stop valve, with speed oscillation value ≯ 6r/min. 1.4.2.2 The governing system is able to guarantee stable parallel operation of steam turbine and other units. 1.4.2.3 The governing system is able to control and guarantee the need of steam turbine incorporating into network and adaptation to changes in speed and load. 1.4.2.4 For this unit operating at rated steam conditions and rated speed, the governing system is able to control the turbine speed not to result in the trip of emergency governor as the unit rejects load. 1.4.3 Technical specifications of steam turbine control system 1.4.3.1 This unit has three sets of governors: Emergency governor handle to be tripped by operator manually for emergency; Mechanical emergency governor to trip at overspeed; Four governor solenoid valves controlled by ETS, which receive the governing signal of important parameters of steam turbine. 1.4.3.2 System function: 1.4.3.2.1 Governing function: The governor valve will trip to shut down the turbine for emergency trip as the following parameter exceeds the specified value. a. Speed rises to 110% of rated speed; b. Axial displacement exceeds ±1.2mm; c. HP & MP cylinder differential expansion exceeds +8.0 or -3.0mm; d. LP cylinder differential expansion reaches +7.5mm; e. Lubricating oil pressure is lower than 0.06Mpa; f. Back pressure of the condenser is lower than 20.3kPa;

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TURBINE OPERATION RULES

g. Peak to peak vibration amplitude of the rotor is ≥ 0.254mm; h. Metal temperature of # bearing 1-3 reaches 112℃, the metal temperature of bearing #4 and #5 reaches 80℃ or the temperature of thrust bearing reaches 107℃; i. EH oil pressure decreases to 9.31Mpa; j. Power failure to DEH system; k. Exhaust temperature of LP cylinder reaches 121℃; l. The oil level of the main oil tank is lower than 1245mm; m. MFT of the boiler; n. Main protection of the generator operates. 1.4.3.2.2 Oil injection test function 1.4.3.2.3 Emergency governor test function 1.4.3.2.4 Steam turbine reset function

1.5 Heat calculation data of the steam turbine Name

Unit

Rated conditions THA

TMCR

VWO

Cutting off all HP Heaters

Generator end power

kW

135,029

135,101

145,005

135,043

t/h

407.502

410.107

440.000

368.560

MPa/℃

13.24/535

13.24/535

13.24/535

13.24/535

HP cylinder exhaust pressure

MPa

2.533

2.534

2.724

2.677

HP cylinder exhaust temperature

℃

312.1

311.9

317.8

321.6

Reheat steam flow

t/h

335.397

335.701

360.968

354.820

Reheat steam pressure /temperature

MPa/℃

2.33/537

2.332/537

2.506/537

2.463/537

Back pressure

kPa

5.4

5.4

5.4

5.4

Cooling water temperature

℃

32.1

32.1

32.1

32.1

Feed water temperature

℃

244.4

244.5

248.8

171.4

Make-up water flow

kg/h

0

3

0

0

Flow into condenser

t/h

284.081

282.090

303.577

298.143

Heat rate

kJ/kWh

8,402.9

8,363.9

8,355.9

8,630.8

Steam rate

kg/kWh

3.018

3.036

3.034

2.729

No.1 extraction steam condition

MPa/℃

3.552/354.9

3.56/354.9

3.832/361.4

No.1 extraction flow

t/h

22.14

23.051

24.681

No.2 extraction steam condition

MPa/℃

2.457/312.3

2.458/312.1

2.642/317.9

No.2 extraction flow

t/h

36.871

38.251

40.589

No.3 extraction steam condition

MPa/℃

0.73/377.9

0.729/377.6

0.784/377.5

0.769/377.1

No.3 extraction flow

t/h

8.066

8.47

9.124

9.863

No.4 extraction steam condition

MPa/℃

0.451/315.8

0.45/315.4

0.484/315.3

0.475/315

No.4 extraction flow

t/h

13.064

13.57

14.335

14.003

Total steam inlet flow of steam turbine Initial steam pressure /temperature

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TURBINE OPERATION RULES

Name

Unit

Rated conditions THA

TMCR

VWO

Cutting off all HP Heaters

No.5 extraction steam condition

MPa/℃

0.251/248.4

0.25/247.8

0.269/247.8

0.264/247.5

No.5 extraction flow

t/h

22.097

22.912

24.148

23.568

No.6 extraction steam condition

MPa

0.067

0.0665

0.0718

0.0705

No.6 extraction flow

t/h

15.801

16.335

17.153

16.775

No.7 extraction steam condition

MPa

0.0143

0.0142

0.0152

0.015

No.7 extraction flow

t/h

2.905

2.95

3.977

3.621

Note: Turbine Heat Acceptance condition (THA): means the condition in which the unit can operate safely and continuously with generator’s net output power of 135MW when the turbine is under rated initial steam and reheat steam conditions, back pressure is 5.4kP, make-up water percentage is 0%, and regenerative system is put into operation all normally and generator’s efficiency is 98.4％, which heat rate is not more than the acceptance value of 8,402.9kJ/kWh. Turbine maximum continue rate (TMCR): means the condition in which the unit can operate safely and output maximum power when the turbine is under rated initial steam and reheat steam conditions, back pressure is 5.4kP, make-up water percentage is 3%, and regenerative system is put into operation all normally and generator’s efficiency is 98.4％. Valve Wide Open condition (VWO): means the condition in which the turbine’s steam inlet flow is 440t/h when the turbine’s governing valves are wide open and the other conditions is the same with 2.1.1, which output value is 145.822MW. This condition corresponds to the Boiler Maximum Continue Rate (BMCR).

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TURBINE OPERATION RULES

Chapter 2 Specification of Auxiliary Equipment

2.1 Specification of heater 2.1.1 Specification of HP heater Item

Unit

Model

HP heater #2

HP heater #1

JG-530-2-00CK

JG-530-1-00CK

Design pressure of shell side

Mpa

3.0

4.5

Design temperature of shell side

℃

350/250

390/260

Design pressure of tube side

Mpa

20

20

Design temperature of tube side

℃

250

260

Feed-water Inlet temperature

℃

172.2

223.9

Feed-water outlet temperature

℃

223.9

248.8

Working pressure

Mpa

Tube side 18

Tube side 18

Shell side 2.64

Shell side 3.8318

Working temperature

℃

Shell side 317.9/180

Shell side 361.4/247.8

Manufacturer

Qingdao Qingli Boiler Auxiliary Equipment Co., Ltd.

2.1.2 Specification of LP heater Item

Unit

Model

LP heater #7

LP heater # 6

LP heater # 5

LP heater # 4

JD-220-1-1

JD-300-1-3

JD-300-1-2

JD-300-1-1

Heating surface area

M2

200

300

300

300

Design pressure of tube side

Mpa

2.5

2.5

2.5

2.5

℃

100

100

150

180

Design temperature of tube side

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TURBINE OPERATION RULES

Design pressure of shell side

Mpa

0.05

0.4

0.4

0.5

℃

100

100

260

350

Working pressure of tube side

Mpa

1.724

1.724

1.724

1.724

Working pressure of shell side

Mpa

0.0152

0.07257

0.2693

0.454

℃

55

69.45

109.05

138.25

℃

55

90.63

129.9

150.6

Design temperature of tube side

Working temperature of tube side Working temperature of shell side Manufacturer

Shanghai Power Equipment Co., Ltd.

2.1.3 Specification of deaerator and deaerated water tank 2.1.3.1 Specification of deaerator Class

Class I

Test pressure

1.374MPa

Model

GC-514

Pressure drop of nozzle

0.0588MPa

Design pressure

0.88Mpa (g)

Opening pressure of safety valve

0.85MPa

Design temperature

380℃

Operating mode

Max working pressure

0.78Mpa (a)

Rated output

514t/h

Oxygen content of outlet water

≤7PPb

147℃

Outlet water temperature

169.3℃

Inlet water temperature Manufacturer

Sliding pressure operation

Corrosion allowance (tank

1.6/2.5mm

/deaerator)

Qingdao Qingli Boiler Auxiliary Equipment Co., Ltd.

2.1.3.2 Specification of dearated water tank Class

Class I

Opening pressure of safety valve

0.85MPa

Type

GS-120

Test pressure

1.374MPa

Design pressure

0.88Mpa (g)

Effective volume

120m3

Design temperature

380℃

Total volume

140m3

Max working pressure

0.68MPa

Manufacturer

Corrosion allowance (tank /deaerator)

1.6/2.5mm

Qingdao Qingli Boiler Auxiliary Equipment Ltd.

2.2 Specification of feed-water pump 2.2.1 Feed-water pump and booster pump Equipment parameter

Unit

Model

Feed-water pump

Booster pump

FK5G32

QG500-80

Number of stages

stage

5

1

Inlet water flow

3

m /h

533.3

533.3

Outlet water flow

3

497.8

533.3

m /h - 14 -

TURBINE OPERATION RULES

Lift

m

1771.9

79.6

Inlet water pressure

MPa

1.48

0.6837

Outlet water pressure

MPa

19.18

1.48

Shaft power

kW

2733.9

128.7

Rotating speed

r/min

4686

2982

Working temperature

℃

166.7

166.7 900.59

3

Medium density

kg/m

900.59

Intermediate bleed-off pressure (stage 2)

MPa

8

Intermediate bleed-off flow

m3/h

35.5

Guarantee efficiency

%

81.32

80.84

Shanghai Power Equipment

Manufacturer

Maintenance Works Co., Ltd.

2.2.2 Specification of feed-water pump motor 2.2.2.1 Specification of feed-water pump motor Item

Unit

Specification

Model

YKOS3700-2

Rated power

kW

3,700

Rated voltage

V

6,600

Rated current

A

370

Rated speed

r/min

2,982

Rated frequency

Hz

50

Connection type of stator Insulation class

Y Class

F

Power factor COSφ

0.9

Cooling mode

Air-cooled

Temperature rise

℃

80

Manufacturer

Shanghai Motor Co., Ltd.

2.2.2.2 Specification of air cooler of feed-water pump motor Item

Unit

Specification

Capacity of cooler

kW

160

Operating water flow

t/h

60

Circuit of cooling water

Group

2

Air pressure drop

kPa

0.32

Working water pressure

MPa

0.2-0.4

Max permitted water pressure

MPa

0.5

2.2.3 Specification of hydraulic coupling

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TURBINE OPERATION RULES

2.2.3.1 Parameters of hydraulic coupling Item

Unit

Specification

Model

R17K.2-E

Motor speed

r/min

2,986

Output speed

r/min

4,783

Max output power

kW

3,000

Slip

%

≤3

Scope of speed governing

%

25-100

Efficiency

%

94.7

Capacity of oil tank

m3

0.85

Manufacturer

Germany VOITH

2.2.3.2 Auxiliary equipment of coupling Item

Unit

Auxiliary oil pump

Model

Working oil

Lubricating oil

cooler

cooler

CB-B125

LY54

LY16

Oil flow

3

m /h

7.5

30

17

Pressure

MPa

0.25

Cooling surface area

m2

54

16

Cooling water flow

3

120

27

m /h

2.3 Circulating water system 2.3.1 Specification of circulating water pump Specification of circulating water pump

Specification of circulating water pump

(double pumps in parallel operation)

motor

Model

44LBXA-23

Model

YLKK900-10

Shaft power

770.3 kW

Voltage

6,600V

Lift

23m

Current

98A

Rotating speed

595 r/min

Power

900kW

Flow

10,728t/h

Power factor

0.86

87.2%

Rotating speed

595r/min

Efficiency

3

Cooling water of bearing

90m /h, 0.3MPa

Mini submergence

3m

Manufactured by

Changsha Water Pump Works

Manufactured by

Shangyang Electric Machine Co., Ltd.

2.3.2 Automatic back washing strainer Item

Unit

Model

Specification ASCS300

Working pressure

MPa

0.3

Max pressure

MPa

0.6

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TURBINE OPERATION RULES

Inlet & outlet diameter

mm

Manufactured by

φ300

Shanghai Power Equipment Research Institute

2.3.3 Circulating water booster pump Specification of circulating water booster pump

Specification

of

circulating

water

booster pump motor

Model

10Sh-9A

Model

Y250M-4

Shaft power

40 kW

Voltage

415 V

Lift

30 m

Current A

Rotating speed

1,480r/min

Power

Flow

420 t/h

Power factor

Efficiency

80%

Rotating speed

1,480 r/min

Manufactured by

Xi’an Motor Works

Shijiazhuang Kingda Pump

Manufactured by

Co, Ltd.

55 kW

2.3.4 Indoor circulating sump pit blowdown pump Specification of indoor circulating sump pit

Specification of indoor circulating

blowdown pump

sump pit blowdown pump motor

Model

40PV-SP

Model

Y112M-2

Shaft power

3.1kW

Voltage

415V

Lift

15m

Current A

Rotating speed

1,800 rpm

Power

Flow

25t/h

Power factor

Efficiency

34%

Rotating speed

2900 r/min

Manufactured by

Xi’an Motor Works

Shijiazhuang Kingda Pump

Manufactured by

Co., Ltd.

4 kW

2.3.5 Trash remover of circulating water pump house Specification of trash remover of circulating water

Specification of trash remover motor

pump house

of circulating water pump house

Model

ZSB-3500

Model

BWD5-87-5.5

Water head in operation start

300mm

Max design water head

600mm

Voltage

415V

Mesh size

3.5×53 mm

Current A

6~7 m/min

Power

Total Number of scrubbing brush

4

Power factor

Rotating speed of round brush

20.33 r/min

Rotating speed

Travelling speed of scrubbing brush

Manufactured by

Jiangsu Yihaun Group Co., Ltd.

5.5 kW

87 rpm

Manufactured by

2.4 Shaft seal system 2.4.1 Shaft seal HP & MP seal ring are high & low-tooth labyrinth structure and LP seal ring is flat tooth structure; HP & MP cylinder diaphragm seal is embedded seal, the sealing strip is riveted into the diaphragm with fillet; the seal ring of LP diaphragm seal is mounted in the septalium and fixed - 17 -

TURBINE OPERATION RULES

with spring leaf. 2.4.2 Shaft seal heater Item

Unit

Specification

Model

JQ-50-1 2

Heating surface area

m

50

m3/h

Total flow, 300 minimum

Design pressure

MPa

Tube side 3.1, shell side 0.1

Working pressure

MPa

Tube side 2.00

Test pressure

MPa

Tube side 3.9, shell side 0.125

Design temperature

℃

Tube side 100, shell side 100

Working temperature

℃

Tube side 60, shell side 100

Net weight

t

2.23

Design flow of main condensate flow

2.4.3 Shaft seal fan: Specification of shaft seal fan

Specification of the motor

Model

AZY-09.32-020.0-01

Model

132S

Full pressure

9.32kPa

Power

7.5kW

Speed

2,900r/min

Speed

2,900r/min

Flow

20m3/min

Voltage

415V

Manufactured by

Zhejiang Yuyao Blower Plant

Manufactured by

Wannan Electric Machine Co., Ltd.

2.5 Condensate and steam extraction system 2.5.1 Specification of condenser Model Type Total active cooling surface area Design pressure of tube side Design pressure of shell side

N-9000 Single shell, bisection, double passes and surface type 9,000 m2 0.25MPa 0.1MPa/Vac

Test pressure of tube side

0.375MPa

Cooling water flow

20,200m3/h

Manufactured by

Shanghai Power Equipment Co., Ltd. - 18 -

Cooling water temperature Number of pass Velocity in cooling water pipe Outer diameter of cooling water pipe Water resistance of condenser Total number of copper tube Net weight

32.5℃ 2 2m/s φ25mm