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EGAT ELECTRICITY GENERATING AUTHORITY OF THAILAND
RAYONG COMBINED CYCLE PLANT
3 x 300 MW BLOCK I, II, III
GENERAL SYSTEM DESCRIPTION PHASE II COMBINED CYCLE SECTION
SUBJECT: HRSG PACKAGE
HRSG CONTROL SYSTEM
HP. & LP. BOILER FEED PUMP (FWA)
REVISION 0 DATEV 10/06/34
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HRSG PACKAHGE
HRSG CONTROL SYSTEM
HP & LP BOILER FEED PUMP (FWA)
CONTENT : PAGE:
1. FUNCTION OF HP FEED WATER 4
2. DESCRIPTION OF THE SYSTEM 5
- HP BOILER FEED PUMP
- PUMP LUBRICATING SYSTEM
- PUMP COOLING SYSTEM
- PUMP SHAFT SEAL SYSTEM
- PUMP MINIMUM FLOF
- HP FEED WATER CONTROL VALVES
- HP SUPERHEAT DESUPERHEATER
3. NORMAL OPERATION 6
4. FUNCTION OF LP FEED WATER 8
5. DESCRIPTION OF THE SYSTEM 8
- LP BOILER FEED PUMP
- PUMP COOLING SYSTEM
- PUMP MINIMUM FLOW
- LP FEED WATER CONTROL VALVES
6. NORMAL OPERATION 9
7. ABNORMAL CONDITIONS 10
8. LOGIC DIAGRAMS 11
9. ANALOG CONTROL DIAGRAM 31
10.PROCESS AND INSTRUMENT DIAGRAMS 38
TOTAL 36 p.
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FEED WATER SYSTEM (FWA)
2 - HIGH PRESSURE FEED WATER SYSTEM
- LOW PRESSURE FEED WATER SYSTEM
HIGH PRESSURE FEED WATER SYSTEM
1. SUPPLY HRSG 2 HP. BOILER FEED PUMPS
DEAERATOR STORAGE TANK BOILERS HP. ECONOMIZER INLET HP. BOILER DRUMS SUPPLY HP. SUPERHEAT DESUPER-
HEATER
2. DWG. NO. FWA - M2009A- M2009B
2.1 HP. BOILER FEED PUMPS (FWA-P-1A, P-1B, P-1C)
2.1.1 PUMP 3 (3x50%) 2 STAND BY 1 MULTISTGECENTRIFUGAL PUMP DRIVING 6.6 KV. MOTOR
- SUCTION ISOLATE MANUAL VALVES BV-39 , 44 , 49- SUCTION STRAINER SIMPLEX BASKET DIFF. PRESS.
GAUGE DIFF. PRESS. SWITCH (HIGH PRESS. ALARM) STRAINER STRAINER (PS-0708, 0805 , 0905)
- DISCHARGE MOTOR OPERATED VALVES, MBV-7,14 , 21
MANUAL BYPASS VALVES (FILL VALVE)BV-250 , 251 , 252
NON-RETURN/RECIRCULATING VALVESCV-3,10,17
2.1.2 PUMP LUBICATING SYSTEM - OIL RESERVOIR- MAIN SHAFT DRIVENOIL PUMP- ELECTRIC MOTOR DRIVEN AUXILIARY OIL PUMP- DUPLEX FILTER- OIL COOLER 2
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2.1.3 PUMP COOLING SYSTEM
COOLING PUMP CLOSE CYCLE COOLING WATER(ECB) PUMP
- LUBE OIL COOLERS 2 - MOTOR COOLER 1 - SHAFT SEAL HEAT EXCHANGER 2 - PUMP CASING COOLER 2
( DWG. ECB-M2005B ) 2.1.4 PUMP SHAFT SEAL SYSTEM
SEAL PUMP MECHANICAL SEAL FEED
WATER PUMP COOLING FEED WATER FILTER HEAT EXCHANGERS COOLINGMECANICAL SEAL PUMP
2.2 MINIMUM FLOW CIRCUIT
FEED WATER (DISCHARGE HP.BOILERFEED PUMP, LOW FLOW) PUMPS
AUTOMATIC NONRETURN/RECIRCULATING VALVE MINIMUM FLOW
NON-RETURN/RECIRCULATING VALVE DISCH. PUMP DEA.STORGE TAMK DEA. ORIFICE DEA. DEA.
PUMP MINIMUM FLOW 38 M3/HMANUAL BYPASS VALVES BV-256,257,258,259,260,261
START UP NON-RETURN/RECIRCUTATING VALVE
2.3 HIGH PRESS MAIN FEED WATER CONTROL VALVES
(FWA-ACV-102, ACV-107, ACV-112 HRSG 11)(FWA-ACV-159, ACV-164, ACV-169 HRSG 12)FEED WATER FLOW SUPPY HRSG 2 FLOW -
CONTROL VALVES 3 HRSG 1
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FEED WATER CONTROL VALVES - HP.LOW FLOW FEED WATER CONTROL VALVES ACV-102 HRSG.11
,ACV-159 HRSG.12
- HP. FEED WATER CONTROL VALVES (2 X 100%)
ACV-107 , ACV-112 HRSG 11ACV-164 , ACV-169 HRSG 12
HP. LOW FLOW CONTROL VALVE STARTUP 30%FLOW MAIN CONTROL VALVE LOAD HP.BOILER DRUM LEVEL
LOAD 100% MAIN CONTROL VALVES 1 DRUM
LEVEL HIGH HIGH BOILER FEED PUMP CONTROLVALVES ( LOGIC & ANALOGCONTROL DIAG.)
2.4 HIGH PRESSURE SUPERHEAT DESURERHEATER
HP.STEAM HRSG 2 SUPPLY STEAM TURBINE SUPERHEAT SUPERGHEAT STEAM TURBINE
HP.STEAM SPRAY (HP.DESUPERHEAT WATER)
HP.STEAM HP. DESUPERHEATER CONTROL - HP. DESUPERHEATER CONTROL VALVE , ACV-99 HRSG.11, ACV-156
HRSG.12- MOTOR OPERATED BLOCR VALVE , MBV-93 HRSG.11, MBV-150
HRSG.12- PNEUMATIC SHUT OFF VALVE , ABV-96 HRSG.11 ,ABV-153
HRSG.12
( LOGIC DIAGRAM ANALOG CONTROL DIAGRAM)
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2.5 INSTRUMENT - FLOW TRANSMITER FUNCTION
FT. -0701,0801,0901 HP. BOILER FEED PUMP DISCH.WATER FLOW
FT. -1001,1002,1003 TOTAL WATER FLOW.TO HRSG.11 HP.BOILER DRUM
FT. -2001,2002,2003 TOTAL WATER FLOW TO HRSG.12 HP.BOILER DRUM
FT. -1004 HP. SUPERHEAT DESUP. WATER. FLOW TO HRSG.11
FT. -2004 HP. SUPERHEAT DESUP. WATER FLOW TO HRSG.12
- PRESS. TRANSMITER
PT. -1001,2001 HP. BOILER FEED PUMP DISCH PRESS TOHRSG.11,12
PT. -1002,2002 FEED WATER PRESS TO HRSG.11,12
- CONTROL VALVES
ACV-102,159 HP. LOW FEED WATER CONTROL TO HRSG 11,12
ACV-107,112,164,169 HP. FEED WATER CONTROL TO HRSG 11,12
ABV-96,153 HP. FEED WATER DESUP. CONTROL TO HRSG 11,12
3. NORMAL OPERATION
HP. FEED WATER SYSTEM HP. BOILER FEED PUMP 2 SUPPLY
AUTO STAND BY 1 FEED WATER SUPPLY HRSG.11 12 FEED
HP. BOILER DRUM CONTROL VALVES 3 HP. BOILER DRUM 1 CONTROL VALVES 3 HP. LOW FLOW CONTROL VALVE 1
HP. DRUM START UP 2 LOAD
CONTROL FEED WATER SUPPLY HP.DRUM CONTROL
MANAUL
AUTOMATIC (
CONTROL ROOM)
AUTOMATIC LOCAL SIGNAL - HP. DRUM LEVEL - HP. STEAM TEMP
- HP. DRUM PRESS - HP. FEED WATER FLOW
- HP. STEAM FLOW - HP. FEED WATER PRESS
- HP. STEAM PRESS - HP. FEED WATER TEMP
( ANALOG CONTROL DIAGRAM)
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LOW PRESSURE FEED WATER SYSTEM
1. SUPPLY HRSG 2 LP. BOILER FEED PUMPS
DEAERATOR STORAGE TANK BOILERS LP. ECONOMIZER INLET LP. BOILER DRUMS SUPPY HP.STEAM WARM UPDESUPER HEATING
2. 2.1 LP.BOILER FEED PUMPS (FWA-P-2A,P-2B,P-2C)
2.1.1 PUMP 3 (3X50%) 2 STAND BY 1 SINGLE
STAGE CENTRIFUGAL PUMP DRIVING 380 V. MOTOR
- SUCTION MANAUL ISOLATE VALVE BV-54,59,64- SUCTION STRAINER SIMPLEX BASKET DIFF.PRESS
GAUGE DIFF PRESS SWITCH CHIGH PRESS ALARM) STRAINER STRAINER
- DISCHARGE MOTOR OPERATED VALVES MBV-26,31,36 NON-RETURN/RECIRCULATING VALVES CV-23,28,33
2.1.2 PUMP COOLING SYSTEM
COOLING PUMP CLOSED CYCLE COOLINGWATER (ECB) OIL COOLER PUMP
2.2 MINIMUM FLOW CIRCUIT
AUTOMATIC NON-RETURN/RECIRCULATING VALVE MINIMUM FLOW PUMP PUMP DISCH. LOWFLOW
NON-RETURN/RECIRCULATING VALVE DISCH PUMP DEA.STORAGE TANK ORIFICE
PUMP MINMUM FLOW 10 M3/N
2.3 LOW PRESS. MAIN FEED WATER CONTROL VALVES
(SGF-ACV-180,ACV-185 HRSG.11) +DWG SGF-M2024 A(SGF-ACV-1180,ACV-1185 HRSG.12)
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FEED WATER FLOW SUPPLY HRSG 2 FLOW -
CONTROL VALVES 2 HRSG 1 LP. FEED WATER CONTROL VALVE LP. DRUM INLET (DWG.NO SGF-
M2024 A,B)
DRUM LEVEL HIGH HIGH BOILER FEED PUMPS CONTROL VALVES ( LOGIC & ANALOG CONTROL DIAG)
2.4 INSTRUMENT - FLOW TRANSMITER FUNCTION
FT. -0703,0803,0903 LP. BOILER FEED PUMP DISCH.WATER FLOW
FT. -1005,1006,1007 TOTAL WATER FLOW.TO HRSG.11 LP.BOILER DRUM
FT. -2005,2006,2007 TOTAL WATER FLOW TO HRSG.12 LP.BOILER DRUM
- PRESS. TRANSMITER
PT. -1003,2003 LP. BOILER FEED PUMP DISCH PRESS TOHRSG.11,12
PT. -1004,2004 FEED WATER PRESS TO HRSG.11,12
- CONTROL VALVES
ACV-180,185 LP. FEED WATER CONTROL VALVES TO LP. DRUM 11,12
ACV-1180,1185 LP. FEED WATER CONTROL VALVES TO LP. DRUM 12
3. NORMAL OPERATION
LP. FEED WATER SYSTEM LP. BOILER FEED PUMP 2 SUPPLY AUTO STAND BY 1
FEED WATER SUPPLY HRSG.11 12 LP.BOILER DRUM
CONTROL VALVES 2
LP. DRUM 1
CONTROL VALVES 2 LOAD CONTROL LP. DRUM LEVEL MANAUL AUTOMATIC
AUTOMATIC LOCAL SIGNAL - LP. DRUM LEVEL - LP. STEAM TEMP
- LP. DRUM PRESS - LP. FEED WATER PRESS
- LP. STEAM FLOW - LP. FEED WATER TEMP
- LP. STEAM PRESS - LP. FEED WATER FLOW
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4. HP. & LP. FEED WATER4.1 6.9 KV. 380 V POWER SUPPLY
- MOTOR STOPS
- MOTOR OPERATED VALVE
4.2 125 V. DC POWER SUPPLY- PUMPS - POWER ALARM
4.3 CONTROL AIR SUPP
- DESUPER HEAT WATER SHUTOFF VALVES ( ABV-96,153 ) CLOSE
- PNEUMATIC CONTROL VALVES ( ACV-102,107,112,99,159,164,169,156 )
CLOSE
4.4 240 V. AC. POWER SUPPLY- MOTOR HEATINGS STOP
- DESUPERHEAT WATER SHUTOFF VALVES ( ABV-96,153 ) CLOSE
5. LOGIC CONTROL LOOPS LOGIC DIAGRAM .- HP. & LP. BOILER FEED PUMP START-UP, SHUTDOWN ORDER
- HP. & LP. BOILER FEED LUBE OIL PUMPS START, STOP ORDER
- HP. & LP. BOILER FEED DISCHARGE VALVES OPENING, CLOSING ORDER
- HP. & LP. INLET HEADER ISOLATING VALVES OPENING CLOSING ORDER
- HP. DESUPERHEAT BLOCK VALVES OPEN/CLOSE ORDER
- HP. DESUPERHEAT SHUT OFF VALVES OPERATION
- HP. DESUPERHEAT CONTROL VALVES OPERATION
- VISUAL ANNUNCIATOR
6. ANALOG CONTROL LOOPS ANALOG CONTROL DIAGRAM - HP. DRUMS LEVEL CONTROL
- LP. DRUMS LEVEL CONTROL
- HP. STEAM TEMP. CONTROL
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HP. FEED WATER PUMP START (1A) FWA SYSTEM
SAME SEQUENCE FOR THE 3 PUMPS FOLIO 1/2
RAY FWA NF 090C REV. C
Lockout
Standby start orderManual start order
Deaerator tank low Level
FWC LT 9007.3
Suction valve openZSO 0701
Main discharge valve
closed
ZSC 0704
Header pressure
> 70 barPT 1001.2 OR
Lube oil pressure > 0.8 barPSL 0701
Start-up order to lube oil
pump P3A see folio 3
HP feed water pump
Start order
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HP. FEED WATER PUMP START ( PUMP 1A)
START HP. FW. PUMP 2 - MANUAL START ORDER DCIS START
- STANDBY START ORDER HP. BFP 1B 1C TRIPPED DUMP (TRIP DUE TO INTERNAL PROBLEM) DEAERATOR LEVEL LOW-LOW (PROCESS SHUTDOWN)
HP. FWP. START ORDER PUMP MOTOR BKR ( PUMP 1A PUMP )
- NO LOCK OUT DCIS- MANUAL START ORDER OPERATOR
- DEAERATOR LEVEL NOT LOW
- SUCTION VALVE OPEN
- PUMP DISCHARGE VALVE CLOSED
AUX. LUBE OIL PUMP START LUBE OIL PRESS 0.8 BAR (PS-0701)
- LUBE OIL PRESSURE > 0.8 BAR (PS-0701)
PUMP MOTOR BKR ON AUTO OPEN DISCH. VALVE PUMP 1A,1B 1C 100%
MANUAL START PUMP 1A STANDBY START PUMP 1B 1C HP. FWP START ORDER
- NO LOCK OUT DCIS- MANUAL START ORDER OPERATOR STANDBY START ORDER
- DEARATOR LEVEL NOT LOW
- SUCTION VALVE OPEN
- PUMP DISCHARGE VALVE OPEN FW. HEADER PRESSURE > 70 BAR
AUX. LUBE OIL DUMP START LUBE OIL PRESSURE 0.8 BAR (PS-0701)
- LUBE OIL PRESSURE > 0.8 BAR (PS-0701)
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HP. FEEDWATER SHUTDOWN ( PUMP 1A)HP. BFP 2
1. MANUAL SHUTDOWN ORDER PUMP
DCIS STOP2. TRIP PUMP MOTOR BKR OFF
2.1 PROCESS SHUTDOWN DEAERATOR LEVEL LOW-LOW STANDBY START PUMP
2.2 INTERNAL PROBLEM HP.BFP
STANDBY START PUMP INTERNAL PROBLEM
- PUMP BRG 1 TEMP HI-HI- PUMP BRG 2 TEMP HI-HI- PUMP THRUST BRG FACE 1 TEMP HI-HI- PUMP THRUST BRG FACE 2 TEMP HI-HI- MOTOR BRG 1 2 TEMP HI-HI- MECHANICAL SEAL WATER DE NDE TEMP HI-HI- SUCTION VALVE CLOSED PUMP RUNNING 10
SEC.
- PUMP RUNNING 30 SEC PUMP DISCH.FLOW LOW
- PUMP BRG 1 2 VIBRATION HI-HI 10 SEC.- DUMP RUNNING 10 SEC LUBE OIL
PRESS. 0.5 BAR
- MOTOR ELECTRICAL FAILURE TRIP BKR SWGR.
MOTOR OVERLOAD
GROUND FAULT DETECTED (50G)
OVERCURRENT DETECTED (50G)
AUTO START AUX. LUBEOIL PUMP
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TE 0703.1
OR TE0704.1
OR TE0705.1 RUNNING
OR TE0706.1 (BKR.ON)
OR TE0713.1
OR TE0714.1
INTT0702
INTF0707 A
A
more
than
A 10S
BFPC BFPB
TRIP
VA HP BFP TRIP
FWC INTL 0009
Lube oil pump
See folio 3
HP FEED WATER PUMP SHUTDOWN FWA SYSTEM
SAME SEQUENCE FOR THE 3 PUMPS FALIO 2/3
RAY FWA NF 090C REV. C
Motor or pump bearing very
high temperature HP feed water pump
Start order
Mechanical seals very high
temperature
TE0715.1 or TE0716.1
After
10S
Tea low discharge
Flow FT 9701.3
After
10SPump bearing very highvibrations
VSHH0707 or 0708
Suction valve open
ZSO 0701
Lube oil pressure 0.5 barPSL 0707
Discharge valve fully open
ZSO 0703
Motor electric failure
Standby start order
Deaerator tank low low level
FWC LT 9007.4
DOA 0001
Deaerator tank low low level
FWC LT 9007.4
HP. Feed water pump
Shutdown order
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FROM
FOLIO 2
FROM
FOLIO 1
SEC.
MIN.
OPERATION OF LUB. OIL PUMP P3A FWA SYSTEM
(SAME SEQUENCE FOR THE 3 PUMPS) FOLIO 3/4
RAY FWA NF 090C REV. C
HP. FEEDWATER PUMP
IN OPERATION
LUB OIL PRESSURE
< 1 BARPSL 0702
HP. FEEDWATER PUMP
SHUTDOWN ORDER
START UP ORDER TO
LUB OIL PUMP
LUB OIL PUMP
IN OPERATION
LUB OIL PRESSURE
3,5 BARPSH 0703
10
5
STOPPAGE OF
LUB OIL PUMP
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(AUTO OPEN)
ALL BFP.
STOP
COMMAND
FWA ACV 102/107/112
(FWA ACV 159/164/169)
Force to close
HP. FW Control
Valves! (AUTO CLOSE)
HP. BFP
DISCHARGE VALVES OPERATION FWA SYSTEM
FWA MBV7 , MBV14 , MBV 21 FOLIO 4/5
RAY FWA NF090C REV. C
At least one HP BFP
In o eration
Manual
Open order
HP. Drum Hi. Hi level
SGA LT9107.1
(SGA LT 9207.1)
5S
Lockout Lockout Lockout
Discharge
valve
opening
Discharge
valve
pump B
opening
Discharge
valve
pump C
opening
Manual
Closing order
Discharge
valve
pump A
Closing
Discharge
valve
pump B
Closing
Discharge
valve
pump C
Closing
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FWC INTL0007
INTP0002
LP. FEED WATER PUMP OPERATION STARTING FWA SYSTEM
(SAME SEQUENCE FOR THE 3 PUMPS) FOLIO 5/6
RAY FWA NF 090C REV. C
Lockout
Standby start orderStarting order
LP feed water pump
Deaerator tank
Low level
FWC LT 9007.3
Suction valve
Open (ZSO 0707)
Discharge valve
Closed (ZSC 0710)
Header pressure
> 5 bar G
LP feed water pump
Start-up order
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BFP C BFP B TRIP
VA LP BFP TRIP
FWC INTL 0009
LP. FEED WATER PUMP OPERATION STARTING FWA SYSTEM
(SAME SEQUENCE FOR THE 3 PUMPS) FOLIO 6/7
RAY FWA NF 090C REV. C
LP. Feed water pump
Start order
Suction valve
Open (ZSO 0707)5S
Too low discharge
Flow FT 9703.3Motor
Electric
failure
LP. Boiler feed water
Trip DOA 0002
Deaerator tank
Low low level
FWC LT 9007.4
Standby start
order
Manual shutdown order
By individual order
LP. Feed water pump
Shutdown order
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(AUTO OPEN)
SGA RCV 180/185
(SGA ACV 1180/1185)
Force to close
HP. FW Control
Valves! (AUTO CLOSE)
HP. BFP
DISCHARGE VALVES OPERATION FWA SYSTEM
FWA MBV26 , MBV31 , MBV 36 FOLIO 7/8
RAY FWA NF090C REV. C
At least one HP BFP
In o eration
Manual
Open order
LP. Drum Hi. Hi level
SGA LT9103.1
(SGA LT 9203.1)
5S
Lockout Lockout Lockout
Discharge
valve
opening
Discharge
valve
pump B
opening
Discharge
valve
pump C
opening
Manual
Closing order
Discharge
valve
pump A
Closing
Discharge
valve
pump B
Closing
Discharge
valve
pump C
Closing
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(AUTO CLOSE)
HRSG LP. , HP. FW. BLOCK VALVES
HP. (LP.) ECO. INLET HEADER ISOLATING VALVES FWA SYSTEM
HP: FWA MBV 127 MBV 184 FOLIO 8/9
LP: FWA MBV 202 MBV 220 REV. C
RAY FWA NF 090C
HP. (or LP.) eco inlet header
Isol. Valve
Manual open order
HP. (or LP.) DRUM
High level
HP. (or LP.) eco inlet header
Isolating valve opening
HP. (or LP.) eco. Inlet header isolating
valve manual closing order
HP. (or LP.) DRUM
High High level
HP. (or LP.) eco. Inlet header
isolating valve closing
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HP. DESUPERHEATER SPRAY BLOCK VALVE ( MBV-93 HRSG 11 )HP. FEEDWATER FW. CONTROL VALVES HP.
DESUP. WATER LINE SPRAY BLOCK VALVE MBV-93 (MBV-
150), SPRAY SHUTOFF VALVE ABV-96 (ABV-153) SPRAY CONTROL VALVESPRAY CONTROL VALVE (MODULATE) STEAM TEMP SPRAY BLOCK VALVE SPRAY SHUTOFF VAVLE OPEN
SPRAY BLOCK VALVE 1. BLOCK VALVE MBV-93 OPEN 2
1.1MANUAL OPEN (DCIS) STEAM TEMP. CONTROL STATION MANUAL (NETWORK 90)
1.2 AUTO OPEN STARTUP PROGRAM AUTO MODE
SEMIAUTO HRSG DAMPER OPEN (HRSG IN SERVICE)2. BLOCK VALVE MBV-93 CLOSED 2
2.1 MANUAL CLOSE ORDER DCIS2.2 AUTO CLOSE ( SPRAY DISABLE)
- HRSG 11 HP. STEAM TEMP < 390oC- HRSG 11 DAMPER CLOSED- HRSG 11 STEAM FLOW < 20% STEAM TURBINE RUN (NOT
TRIPOED)
- HRSG 11 STEAM FLOW < 20% STEAM YURBINE TRIPPED TIME DELAY 20 SEC.
MANUAL CLOSE AUTO CLOSE
- SWITCH TEMP CONTROL STATION MANUAL MODE CONTROL SIGNAL TO MINIMUM
- CLOSE SPRAY SHUTOFF VALVE (ABV-96)- CLOSE SPRAY CONTROL VALVE
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From Start-Up Program Memory
(Auto)
(Manual)
* to be ajusted between 10 and 20% ( Damper closed
during commissionning test to boiler )
FT3108
20
INTT 0033
INTT 0029
To folio 10/11
& 11/12
HP. DESUPERHEATING WATER
SPRAY BLOCK VALVE MBV 93 FWA SYSTEM
(MBV 150) FOLIO 9/10
SAME SEQUENCE FOR BOTH VALVES REV. C
RAY FWA NF 090C
Manual
open
order
Semi
Auto
mode
Auto
Mode
Steam
temperature
control station
in manual
Damper closed
SGA BD 000102
Spray cont. valve
Signal at mini
ACV 99 (156)
Spray control.
Valve closed
ZSC 1005 (2005)i
Shutoff
Valve closed
ZSC 1003 (2003)
HRSG1 Steam
Temp > 400 oCSGG TE 1032.4
HP. Desuperh.
Block valve
MBV 93 OPEN
HRSG1
Steam flow < 20%SGG INTF 0037
Steam turbine
Tripped DAMPER
CLOSED
SGA BD 000102
Manual
Closing order
HRSG 1 Main
Steam temp>390 oCSGG TE 1032.5
HP. Desuperh.
Block valve
MBV 93 CLOSED
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HP. DESUPHEATER SPRAY SHUTOFF VALVE ( ABV-96 HRSG.11) SHUTOFF VALVE AIR OPERATED VALVE SOL VLV.
/ SOLENOID VALVE ENERGIZE VALVE OPEN CLOSE
VALVE SOL VLV. DEENERGIZE VALVE OPEN COMMAND MEMORY SET
AUTO OPEN MEMORY SET SPRAY CONTROL VALVE
ACV.99 OPEN DEMAND > 0% SPRAY STEAM TEMP VALVE AUTO OPEN ENABLE MEMORY RESET SPRAY
AUTO OPEN ENABLE MEMORY SET 2 1. MANUAL OPEN ENABLE DCIS STEAM TEMP. CONTROL
STATION MANUAL MODE2. AUTO OPEN ENABLE START UP PROGRAM AUTO
MODE SEMI-AUTO MODE
- STEAM TEMP CONTROL STATION SIGNAL AT MINIMUM ( N-90)- SPRAY BLOCK VALVE 100% OPEN (MBV-93)
- SPRAY CONTROL VALVE ACV-99 CLOSED
- HRSG.11 DAMPER OPEN
- HRSG.11 STEAM FLOW > 20%
AUTO OPEN ENABLE MEMORY RESET SPRAY SHUT-
OFF VALVE - MANUAL CLOSE DCIS
- SPRAY BLOCK VALVE CLOSE COMMAND MBV-93- SPRAY BLOCK VALVE NOT 100% OPEN
- SPRAY WATER SPRAY CONTROL VALVE 100%CLOSE SPRAY CONTROL VALVE ACV99 OPEN DEMAND 0%
HP. DESUPERHEATER SPRAY CONTROL VALVE ACV-99 (HRSG.11)
SPRAY CONTROL VALVE ANALOG CONTROL
TEMP. 480-510oC ANALOG CONTROL
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LOGIC SPRAY CONTROL VALVE RELEASE TO MODULATE CONTROLVALVE ACV-99 ACV-156 (HRSG.12) ANALOGCONTROL
SPRAY BLOCK VALVE SPRAY SHUTOFF VALVE ANALOG CONTROL MANUAL MODE CONTROL SIGNAL MINIMUM(0%)
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(From Network-90)
INTF 0037 * tobe ajusted on site between 10 and 20%
See folio 9/10
(Memory set)
HP. DESUPERHEATER SPRAY SHUTOFF VALVE ABV.96 OPERATION FWA SYSTEM
SAME SEQUENCE FOR ABV-153 FOLIO 10/11
RAY FWA NF 090C REV. C
AUTO MODE SEMI. AUTO MODESpray shutoff valve ABV.96
manual o en enable
Steam temp control station
in manualSteam temp control station
si nal at mini
Spray block valve MBV.93
100% o en
Spray control valve ACV.99
closed ZSC 1005
Spray control valve ACV.99
open demand >0
Auto open enable memory
setHRSG.1 Damper closed
SGA BD 000102
HRSG.1 steam flow < 20%SGG FT 9108
Auto open enable
memory set
Spray shutoff valve ABV.96
open command (memory)
Spray block valve MBV.93
close command
Spray shutoff valve ABV.96
manual close order
Spray control valve ACV.99
closed ZSC 1005
Spray shutoff valve ABV.96
open command
Spray block valve MBV.93
100% o en
Spray control valve ACV.99
open demand = 0
Auto open enable memory
reset
Spray shutoff valve ABV.96
closed command (memory)
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* to be adjusted on site
between 10 and 20%
INTF 0037
DESUPERHEATER SPRAY CONTROL VLV. ACV.099 FWA SYSTEM
SAME SEQUENCE FOR ACV.156 FOLIO 11/12
RAY FWA NF 090C REV. C
Spray block valve MBV.93
100% open
Spray shutoff valve ABV.96
closed ZSC 1003
HRSG.1 Damper closed
SGA BD 000102
HRSG.1 Steam flow < 20%SGG FT 9108.
Spray control valve ACV.99
release to modulate
Spray block valve MBV.93
close command
Spray shutoff valve ABV.96
100% closed ZSC 1003
Spray block valve MBV.93
100% open
Decrease signal to min and
force to manual
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TE 9801 INTT 0706
TE 0703.2
TE 0704.2
TE 0705.2
TE 0706.2
TE 0713.2
X6 TE 0714.2
INTT 0701
HP. BFP GATHERED ALARM FWA SYSTEM
(SAME SEQUENCE FOR THE 3 PUMPS) FOLIO 12/13
RAY FWA NF 090C REV. C
BFP
In operation
LUB oil filter
High diff. pressure
Electrical oil pump in
operation
T ( upper _ lowerpart ) > 25 oC
Lub oil pressure
3,5 PSH 0703Bearing or thrust bearing
high temperature
Lub. Oil
high temp
TSH 0701
SEM SEM SEM
SEM
SEM
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TE 0715.2 VSH 0705
TE 0716.2 VSH 0706
LSH 0701
X2 LSL 0702
TE 9707 (INTT 0705)
X2
MS 0701
0703
DOAP 01A01 DOA 0708
DOAP 01B01 DOA 0808
DOAP 01C01 DOA 0908
HP. BFP GATHERED ALARM FWA SYSTEM
(SAME SEQUENCE FOR THE 3 PUMPS) FOLIO 13/14
RAY FWA NF 090C REV. C
Mechanical seals high
Temperature > 80oCPump Bearing high
Vibrations 80
Motor winding high
Temperature>130oC
Suction Filter high
DIFF. pressure
SEM
SEM
SEMSEM
SEM
Moisture Inside
motor
SEM
LUB oil Tank
High or low level
HP. Feed water
pump N - Trouble
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VA LP BFPTROUBLE
DOAP 02A01 DOA 0709
02B01 0809
02C01 0909
LP BFP ALARM FWA SYSTEM
(SAME SEQUENCE FOR THE 3 PUMPS) FLOIO 14/15
RAY FWA NF 090 C REV. C
Suction Filter high
DIFF pressure
SEM
LP. Feed water pump
N Trouble
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TE 1032
VA HRSG.. SPRAY BLOCK
VALVEFAILURE
DESUPER HEATER SPRAY ALARM FWA SYSTEM
SAME SEQUENCE FOR HRSG 2 : DOA 2001 FOLIO 15/16
RAY FWA NF 090C REV. C
HRSG 1 steam temp > 400 oCSGG INTT 0029
After
4 min
Spray block valve MBV. 93
100% open
HRSG 1 spray block VLV.
MBV. 93 failure
FWA. DOA. 1001
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