Transcript
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PROCEDURE FOR COLD
STARTUP(TYPICAL FOR 500MW)
AJAY KUMAR
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ID INDUCED DRAFT
FD FORCED DRAFT
DMCW DE-MINERALIZED COOLING WATER
LOP LUBE OIL PUMP
CT CONDENSATE TRANSFER
FOP FUEL OIL PUMP
CWP COOLING WATER PUMP
ACWP AUXILIARY COOLING WATER PUMP
RH RE - HEATER
SH SUPER HEATER
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MMWC MILLIMETER OF WATER COLUMN
BFP BOILER FEED PUMP
BCW BOILER CIRCULATING WATER
VFD VARIABLE FREQUENCY DRIVE
IGV INLET GUIDE VANES
RAPH ROTARY AIR PRE-HEATERCC CONTROLLED CIRCULATION
SADC SECONDARY AIR DAMPER CONTROL
DP DIFFERENTIAL PRESSURE
NWL NORMAL WATER LEVEL
LOFCV LIGHT OIL FUEL CONTROL VALVE
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CHARGE 11 KV BUS, REQUIRED FOR ID FAN
CHARGE 3.3/6.6 KV BUS, REQUIRED FOR DMCW,INSTR./PLANT AIR COMPRESSORs, & FD FAN
CHARGE 415V BUS, REQUIRED FOR LOPs , CTs &
FOPs
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START CWPs (BOTH 1 & 2)
START ACWPs (BOTH A & B, KEEP ACWP-C AS
STANDBY)
LINE UP DM MAKEUP, DMCW & CT PUMPs
START CW BOOSTER PUMPs (BOTH A & B)
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START INSTRUMENT AIR COMPRESSOR
START PLANT /SERVICE AIR COMPRESSOR
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OPEN BOILER DRUM VENTS
OPEN DIVISIONAL PANEL SUPER HEATER AIR VENTS
OPEN FINAL SUPER HEATER OUTLET HEADER AIR VENTS
OPEN STARTUP VENTS
OPEN ROOF SUPER HEATER AIR VENTS
OPEN SUPER HEATER HEADER DRAIN
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CLOSE ECO / WATER WALL DRAINS
OPEN ECO RECIRCULATION VALVE
OPEN RH VENTS
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START BOILER FILL PUMPs
FILL WATER IN BOILER DRUM UPTO NWL
(-50MM).
FILL DEAERATOR WITH WATER UPTO 1000MMWC
START ONE OF THE BFPs
START BCW PUMPs (CC PUMPs)
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ENSURE ALL MANHOLES IN AIR & FLUE GAS PATH
ARE CLOSED
OPEN ALL GATES & KEEP THE ALL DAMPERS INMAXIMUM POSITION
CLOSE I/L & O/L GATES OF ID FANS
CLOSE O/L GATE OF FD FANS
6. PREPARE AIR & FLUE GAS PATH
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START ID FAN
START FD FAN
REGULATE O/L DAMPER OF FD FAN & VFD / IGV OF ID FAN
TO ACHIEVE A FURNACE PRESSURE CLOSE TO -10MMWC
START RAPH
START SCANNER AIR FAN
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ENSURE AVAILABILITY OF PURGE PERMISSIVES
START PURGE CYCLE
AFTER COMPLETION OF PURGING, SET SADC INAUTO
ENSURE WIND BOX DP IS MAINTAINED AT 40MMWC
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START LDO PUMP
ENSURE OPENING OF MANUAL ISO. VALVESFOR ATM. STEAM & LIGHT OIL AT EACH CORNOR
PURGE OIL GUNS WITH STEAM
ENSURE OIL GUNS ARE ENGAGED PROPERLY & INRETRACTED POSITION.
ENSURE ATOMIZING AIR PRESSURE IS 7Kg/SQ CM
ENSURE LDO PRESSURE IS ABOUT 9 Kg/SQ.CM
INITIALIZE LIGHT UP - OPEN LOFCV & IGNITECORNOR PAIR 1 & 3, & THEN CORNOR PAIR 2 &4
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CLOSE BOILER DRUM AIR VENTS ONCE DRUMPRESSURE REACHES 2 Kg/SQ. CM
CLOSE SUPER HEATER HEADER DRAINS
ONCE THE DRUM PRESSURE REACHES 6Kg/SQ
CM, CLOSE ALL SH VENTS
ENSURE STARTUP VENTS REMAIN OPEN &
MAIN STOP VALVES (BOTH OF BOILER &TURBINE) REMAINS CLOSED
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CHARGING
MAIN STEAM LINE CHARGING
OBSERVE MS PRESSURE EXCEEDING 8 KG/CM2
CD- HEAVY OIL START-UP:
SWITCH ON HFO PUMP-A IN HFO SYSTEM
SWITCH ON PAIR 2&4
WHEN MAIN STEAM PRESSURE CROSSES 8.0KG/SQ.CM CHARGE HP & LP BYPASS
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KEEP ON OPENING HP BYPASS VALVES1&2 TILL THE FOLLOWING ROLLINGPARAMETERS ARE REACHED
Drum Pressure >50 KG/CM2
MS flow > 200TPH
MAIN STEAM Pressure >40 KG/CM2
MAIN STEAM TEMPERATURE >3500C
RH STEAM TEMPERATURE >3200C
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TURBINE START-UP
SGC TURBINE STARTUP
OPEN DRAIN BEFORE HPCV1&HPCV2 SET SPEED REF. TO 180 RPM AND
SWITCH ON THE LOAD CONTROLLER
SELECT TSC MODE TO NORMAL
OBSERVE THE X2 CRITERIAFULFILLNESS
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SELECT SGC TURBINE
OBSERVE ESVS OPENING
OBSERVE TURBINE SPEED CROSSING300 RPM
OBSERVE TURBINE SPEED CROSSING2950RPM
OBSERVE GENERATOR FIELD BREAKERIS ON
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OBSERVE SYNCHRONISER SWITCHES ON & CLOSES THEGENERATOR BREAKER
OBSERVE GENERATOR LOAD CROSSES 50 MW ANDEHTC SWITCHES OVER TO LOAD CONTROL MODE AT
IF THE LOAD DOESNOT CROSS 50 MW RAISE SPEED REF CLOSE HP BYPASS VALVES
SET HP BYPASS PRESSURE SP TO 175 KG/CM2
SET HP BYPASS PRESSURE CONTROLLER TO AUTO
OBSERVE THAT LP BYPASS VALVES CLOSED CLOSE START UP VENTS
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UNIT SYNCHRONISED AND LOAD >50
MW
MILLS IN SERVICE AND INCREASE THE
LOAD
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