_HP&LP Boiler Feed Pump (FWA)

7/27/2019 _HP&LP Boiler Feed Pump (FWA)

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Copyright Reserved By RYCC Power Plant Rev 1.0

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


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


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



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



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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ST PHASE 3 -


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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ST PHASE 3 -


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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ST PHASE 3 -


(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


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


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)


close command


manual close order


closed ZSC 1005


open command


100% o en


open demand = 0

Auto open enable memory

reset


closed command (memory)


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ST PHASE 3 -


* 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



100% open


closed ZSC 1003

HRSG.1 Damper closed

SGA BD 000102

HRSG.1 Steam flow < 20%SGG FT 9108.


release to modulate


close command


100% closed ZSC 1003


100% open

Decrease signal to min and

force to manual


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27

ST PHASE 3 -


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



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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28

ST PHASE 3 -


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



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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29

ST PHASE 3 -


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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30

ST PHASE 3 -


TE 1032

VA HRSG.. SPRAY BLOCK

VALVEFAILURE

DESUPER HEATER SPRAY ALARM FWA SYSTEM

SAME SEQUENCE FOR HRSG 2 : DOA 2001 FOLIO 15/16


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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ST PHASE 3 -

_HP&LP Boiler Feed Pump (FWA)

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