18 SOP for MD BFP

DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

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DB / SOP / BFP

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WORK INSTRUCTIONS FOR MOTOR DRIVEN BOILER FEED PUMP [DB / SOP / BFP]

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DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

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DB / SOP / BFP

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Amendment Record Amendment Rev No.

Amendment Date

Nature of Change

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ACK No.

DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

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DB / SOP / BFP

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1.0 Purpose: This Procedure is intended to provide guidance and instructions for carrying out the MDBFP Start-up Operation 2.0 Scope: This Procedure is applicable to Motor Driven Boiler Feed Pump. Total one No Pump of 30% capacity. 3.0 Responsibility: 1. All the personnel involved in carrying out /supervising the above activities are required to ensure implementation of this procedure. 2. In the event of any changes required in the procedure such changes may be requested with Site in charge, who would take appropriate action with approval from respective departmental heads SYSTEM DESCRIPTION: • The function of BFP is to transfer the Feed Water from Dearator to the economizer. There are three pumps (1*30% capacity MDBFP) & (2*60% capacity TDBFP). • The pumps internal are designed as cartridge, which can be easily removed for maintenance without disturbing the suction and discharge piping work or the alignment of the pump and hydraulic coupling. • The pump shaft is sealed at the DE and NDE by mechanical seals, each seal being flushed by water in a closed circuit and which is circulated by the action of the seal-rotating ring. This flushing water is cooled by passing through a seal cooler, one per pump, which is circulated with clarified cooling water. The rotating assembly is supported by plain white metal lined journal bearings and axially located by a Glacier double tilting pad thrust bearing.

4.0 SAFETY AND ENVIRONMENTAL MEASURES/ CHECKS: Safety measures / checks: 1. Ensure coupling guard of all the pumps is properly fixed. 2. Ensure proper earthling connections of motor. 3. Work area should be clean & no oil, grease splitting should be there. Prepared by: Signature: Name:

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DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

Issue Date:

Revision:

Revision Date:

DB / SOP / BFP

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4. Safety signs should be marked wherever required. 5. Readiness of fire fighting equipment’s. 6. Ensure no oil leak at BFP bearings area. If oil leak is there, collect in suitable container and transfer to the empty barrels and keep that barrel at waste oil storage yard. 7. If any fire / smoke due to oil leak, put off the fire and stop the equipment and start the standby one. 5.0 CHECKLIST: 1. Check Deaerator Level Normal (> mm) 2. Open suction valve of Booster Pump slowly, (partial open) 3. Priming of Booster Pump and BFP is carried out 4. Casing drains and Vent Valves are kept open 5. Working oil and Lube oil cooler taken in service 6. Hydraulic coupling Oil level should be normal 7. Start Lube oil Pump 8. Check Lube Oil Filter DP normal 9. Working oil and Lube oil discharge valve open 10. Check lube oil pressure is normal (1.2 Kg/cm2) 11. Check lube oil flow in all bearings normal. 12. Check the temperature in between top and bottom casing (< 300 C, and Casing and feed water are normal < 50 0 C). 13. Cooling Water System of working oil cooler, lube oil cooler, mechanical sealing cooler is in service 14. Check strainer DP is normal. 15. Ensure re-circulation Manual isolation valve and PCV are open condition. 16. Ensure Balance Leak off line Manual isolation valve is open condition. 17. Ensure all instruments are lined up ( i.e., its root valve/ isolating valves are open ) 18. Ensure Hydraulic coupling scoop is in minimum position. 19. Check the breaker is in service and remote/local switch in remote position. 20. Check local push button is in released position. 21. Check the availability of motor cooling water. 22. After pre check is complete start the Motor 6.0 START PERMISSIVES: 1. 2. 3. 4. 5. 6. 7. 8.

AOP ON and Lube oil press adequate Working oil temp upstream cooler not high Lube oil temp downstream cooler not high Motor winding temp not V. High Motor bearing temp not V. High Switchgear available. EPB not operated. Deaerator level not Low

> 2.0 kg/cm 2 < 110 0C. 0 < 55 C. 1250C. < 850C. <

m

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DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

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9. Discharge valve and IBV CLOSED. 10. DMCW valve to BFP cooler CLOSED. 11. Recirculation valve OPEN. 12. Balance Leak Off line isolation valve OPEN. 13. HC bearing temp not V. High < 850C. 14. Thrust bearing temp not V. High < 1000C. 15. Journal bearing temp not V. High < 900C. 16. Casing differential temp not High < 200C. 17. Suction valve OPEN. START BFP Post start Of MDBFP 1. Ensure no abnormal sound from motor 2. Check the bearing temp.and bearing vibration of booster pump, feed water pump, Motor & Couplings are normal. 3. Check that the lube oil pressure is >1.2Kg/cm2 after orifice and AOP stops automatically 4. Check the working oil pressure and lube oil pressure to be normal. 5. Check that filter DP is ok. 6. Check for any oil leakage from oil coolers and from oil piping. 7. Check that no water leakage present in feed water line. 8. Check the discharge pressure, temperature and flow of BFP 9. Check the suction pressure, temp., flow of booster pump. 10. Bearing oil pressure to each bearing should be normal. 7.0 NORMAL OPERATING PARAMETERS: Parameter BFP discharge pressure. BFP motor current Dearator level Header pressure BFP motor winding Temperature BFP motor bearing Temperature BFP bearing vibration. BFP Motor bearing vibration Pump bearing Temperature Lub Oil cooler Outlet Temperature Working oil cooler Inlet Temperature Boiler feed pump RPM BFP discharge flow

Value kg/cm² A > % > kg/cm² < ºC < ºC Normal Normal < ºC < ºC < ºC rpm tph

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DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

Issue Date:

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DB / SOP / BFP

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STOPPING PROCEDURE OF MDBFP 1. Unload MDBFP by reducing scoop position and open recirculation valve 100% and finally reduced scoop less than 5%. Accordingly take load on TDBFP 2. Stop MDBFP, AOP will start in auto (At Lube Oil Pressure 1 Kg/cm 2), If AOP not start in auto start manually. 3. Close intermediate stage outlet MOV of MDBFP 4. Close outlet MOV of MDBFP and ensure minimum flow PCV in open condition.

Equipment MDBFP

PROTECTIONS 1.BFP-C lube oil press low 2.Working oil temp V. High 3. Working oil press V. Low. (A) kg/cm2(T) 4.Lube oil temp downstream V. High 5.Motor winding temp V. High 6.Motor bearing temp V. High 7. HC bearing temp V. High . 8.EPB operated 9.Suction flow Low 10.Suction valve closed 11.Suction and discharge ΔT High 0 C(A) 12. Suction press V. Low. kg/cm2 (T) 13.Deaerator level V. Low mm(A) mm(T) 14. Booster pump TB temp V. High 0 C(A)

CHECKED STATUS

< 1.0 kg/cm2(A) < 0.8 kg/cm2(T) > 110 0C(A) > 130 0C(T) < 2.5 kg/cm 2 < 2.2 > 55 0C(A) > 60 0C(T) > 125 0C(A) > 130 0C(T) > 80 0C(A) > 85 0C(T) > 90 0C (A) > 95 0C(T) < 200 TPH (T) > 10 > 15 0C(T) < 10 < -580 < -1900 >100

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DB POWER LIMITED, RAIGARH 2 X 600 MW Power Plant SOP for MOTOR DRIVEN BOILER FEED PUMP. Issue No:

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. 15.Booster pump JB temp V. High 16. Suction flow/ speed for 10 sec.

DB / SOP / BFP

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> 105 0C(T) > 90 0C(A) > 95 0C(T) < 50 TPH

17. DP across booster strainer mmwc (A)

< 1500

< 2000 mmwc (T) 18. DP across main pump suction strainer < 1500 mmwc (A) < 2000 mmwc (T) 19. Pump Vibrations High High 20.Motor Vibrations High High 21.Motor winding Temperature High High

Isolation procedure Of MDBFP: 1. Make electrical isolation for MDBFP main motor & disable it from DCS, put switch in local & switch off DC power supply & rack out the breaker. 2. Stop AOP & make it electrically isolate & disable from DCS & Check bearing temp. of pump & motor should be < 50 0 C before stopping the AOP 3. Close suction & discharge MOV of MDBFP and isolate the MOV 4. Close the Minimum Recirculation & Balance Leak off Line isolation valves. 5. Drain MDBFP suction line through suction strainer drain 6. Open drain of Booster Pump Suction strainer. 7. Open drain of Booster Pump Suction strainer. 8. Close cooling & sealing water line of MDBFP booster pump 9. Close mechanical seal cooling line of MDBFP 10. Open drain of Booster Pump Discharge Line 11. Stop Dosing for feed water. 12. When bearing temperature is normal, stop cooling water for Lube oil cooler 13. Follow SI system to issue PTW, isolation and normalization.

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