cold srat up

7/29/2019 cold srat up

1/21

PROCEDURE FOR COLD

STARTUP(TYPICAL FOR 500MW)

AJAY KUMAR


2/21

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


3/21

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


4/21

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


5/21

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)


6/21

START INSTRUMENT AIR COMPRESSOR

START PLANT /SERVICE AIR COMPRESSOR


7/21

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


8/21

CLOSE ECO / WATER WALL DRAINS

OPEN ECO RECIRCULATION VALVE

OPEN RH VENTS


9/21

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)


10/21

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


11/21

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


12/21

ENSURE AVAILABILITY OF PURGE PERMISSIVES

START PURGE CYCLE

AFTER COMPLETION OF PURGING, SET SADC INAUTO

ENSURE WIND BOX DP IS MAINTAINED AT 40MMWC


13/21

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


14/21

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


15/21

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


16/21

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


17/21

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


18/21

SELECT SGC TURBINE

OBSERVE ESVS OPENING

OBSERVE TURBINE SPEED CROSSING300 RPM

OBSERVE TURBINE SPEED CROSSING2950RPM

OBSERVE GENERATOR FIELD BREAKERIS ON


19/21

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


20/21

UNIT SYNCHRONISED AND LOAD >50

MW

MILLS IN SERVICE AND INCREASE THE

LOAD


21/21

cold srat up

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