fsss control

8/9/2019 FSSS Control

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FSSS DESIGN DESCRIPTION

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HARYANA POWER

GENERATION CORPORATION

PANCHKULA, HARYANA

DESEIN PRIVATE LIMITED

CONSULTING ENGINEER,

NEW DELHI

CENTRAL ELECTRICITY

AUTHORITY, SEWA BHAWAN

DCR THERMAL POWER PROJECT

(2X300MW), YAMUNANAGAR


RELIANCE ENERGY LIMITED

REL TOWER, A-2, SECTOR-24

NOIDA (U.P) – 201301

SHANGHAI ELECTRIC (GROUP)

CORPORATION (SEC)

3669 Jindu Road, Shanghai, China

HONEYWELL Honeywell(Tianjin) Ltd

Shanghai Power Equipment

Research Institute


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HONEYWELL

Honeywell(Tianjin) Ltd

Shanghai Power Equipment Research Institute

Project: DCR THERAMAL POWER PROJECT (2X300MW), YAMUNANAGAR

Document title: FSSS DESIGN DESCRIPTION

Document no: 93601179-FSSS-1PSC-01-01

Endorsement

Guo

Rong 2007.1 KangLei 2007.1 Yangjingqi 2007.1

REV DRAWN DATE CHECKED DATE REVIEWED DATE APPROVED DATE REM.


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YANMUNA POWER PLANT FSSS DESIGN

TABLE OF CONTENTS

1， Logic design of MFT--------------------------------------------- ----------------------------4

2， Logic design of furnace purging-------------------------------------------------------------7

3， Logic design of leakage test ------------------------------------------------------------------8

4， Logic design of oil trip-valve-----------------------------------------------------------------11

5， Logic of oil back-valve------------------------------------------------------------------------11

6， Logic design of OFT--------------------------------------------------------------------------12

7， Logic design of oil burner--------------------------------------------------------------------13

8， Programme of pulverizer logic design-----------------------------------------------------18

9， Pulverizer seal air damper logic-------------------------------------------------------------21

10，Burner inlet cut off valve logic---------------------------------------------------------------212

11，Pulverizer outlet cut off valve logic---------------------------------------------------------22

12， Pulverizer inlet cooling valve logic---------------------------------------------------------22

13， Pulverizer inlet hot valve logic--------------------------------------------------------------22

14， Pulverizer logic---------------------------------------------------------------------------------23

15，Coal feeder logic--------------------------------------------------------------------------------23

16， Coal feeder outlet valve logic----------------------------------------------------------------23

17，Coal feeder inlet valve logic-------------------------------------------------------------------25

18，Pulverizer fire steam valve logic--------------------------------------------------------------2519，Cooling fan logic---------------------------------------------------------------------------------25

20, Runback Logic design--------------------------------------------------------------------------26


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一、LOGIC DESIGN OF MFT

The Conditions Of MFT Action:

Condition OR)

MFT action by any condition coming

Remark

1. Turbine trip 10OTRIP

2. All of the P.D.F stopped 10HLB10AN001XB02A，10HLB20AN001XB02A

3. All of the I.D.F stopped 10HNC31AN001XB02A，

10HNC32AN001XB02A，10HNC33AN001XB02A

4. All of the P.A.F stopped(any

Pulverizer is Running)

10HFE10AN001XB02A，10HFE20AN001XB02A

5. All of the cooling air fan stopped 10HLSGC001DI03，10HLSGC002DI03

6. (XXXPa)Pressure of cooling air low(two

of three) Delay 10s

10HLS10CP304，10HLS10CP305，

10HLS10CP306

7. (XXXPa)Pressure of furnace high(two of

three)

10HCP302B，10HCP303A，10HCP304A

8. (-XXXPa)Pressure of furnace low(two of

three)

10HCP302A，10HCP303B，10HCP304B

9. (XXXmm)Level of drum high(two of

three)

10ADRUMLVL，10BDRUMLVL，10CDRUMLVL

10. (-XXXmm)Level of drum low(two of

three)

10ADRUMLVL，10BDRUMLVL，10CDRUMLVL

11. All of the air preheaters stopped 10HLD11AC001XB02A，

10HLD11AC002XB02A，



12. Air flow less than 30% Delay 60s 10AIR30L

13. Manual trip by operator

14. （545℃)Reheater lose protection Furnace outlet air temperature high,

high temperature drain tap and

bypass valve closed

15. Fuel lose All of the pulverizers stopped and

oil trip valve closed, Or all of the

pulverizers stopped and burner oil

valve tripped(any three have been

opened)

16. Flame lose of any corner more than half pulverizers are

running, but any corner loses flame


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and the running pulverizers number

>= 3

17. Flame lose of furnace At least 3 flames can’t be detected

by flame detector in every layer and

pulverizers have been started

MFT logic is of the function of the first out memory, record the

reset of MFT .

The actions of FSSS will come after MFT action:

1. Close oil trip valve FSSS

2. All of the ignitors canceled, retracted and forbidden FSSS

3.

All of the burner oil valves closed FSSS

4. All of the pulverizers and coal feeders trip FSSS

5. The pulverizer outlet valves close FSSS

6. The coal feeder inlet & outlet valves close,

pulverizers hot air valve & cool air valve closeFSSS

MFT relay action

MFT relays act by getting power when any condition of MFT action is coming

MFT relay reset

Condition AND) remark

1. No condition of MFT action is coming

2. The purge of furnace is completed

3. MFT is reset by the operator

MFT relay is reset by all of the three conditions coming

Fig.(1)


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As shown in Fig.(1),the first out of MFT will be displayed when MFT is coming.

We can select the button as shown in Fig.(1) to reset MFT after no MFT

condition coming and completing the purge of furnace, and a red frame appears

around the operating faceplate which indicates that we can reset the MFT by

left mouse clicking on the “MFT RESET” button.

二、LOGIC DESIGN OF FURNACE PURGING

Explanation of furnace purging:

We must purge furnace before every time of starting boiler or after MFT

tripped(no burner is running), which means that purging the combustible in

the furnace and flue in valid time by prescriptive air flow to confirm the

cleanness of the flue. We can reset the MFT relay only after furnace purging

completed.

Preconditions of furnace purging:

Condition AND) Remark


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1. No condition of purging completed

2. No condition of MFT

3. Any P.D.F is running and outlet valve is opened

4.

The chimney and end of flue is expedite(at least

one of the flue is expedite, means that the inlet

valve of the air preheater, I.D.F , electric dust

catcher are opened), and the I.D.F is running

5. All of P.A.F stopped

6. The motor and rotor of air preheater A(or B) are

running normally

I.

7. All of the electric dust catchers stopped

8. No flame in the furnace

9.

All of the burner oil valves closed 10. All of the coal feeders stopped

11. All of the pulverizers stopped

12. All of the pulverizer outlet valves closed

The process of purging

We must purge furnace before every time of starting boiler or after

MFT tripped(no burner is running), “purge is ready” will be displayed

in the picture when all of purge conditions are coming, then operator

can start purge after clicking the “start to purge” button.

一，Send out the signal to open the secondary air baffle (Long signal, willbe reset after purge completed)

二， Start to count down after all of the conditions are ready:


1. Air flow more than 30% From MCS

2. All of the secondary air baffle

position more than 80%From MCS

3. The level of drum normal From MCS

4.

The minus pressure of furnacenormal

“Purge is running” signal will be sent out after all of the above

conditions are ready, and last 300s. “Purge is completed” signal will

be sent out after the leakage test completed successfully.

We should wait one minute at least to start the purging if the MFT is

caused by P.D.F or I.D.F tripped.

三，If any purging condition is not satisfied during the 300s, the “purging

is interrupted” signal and cause will be sent out , the boiler need to

be purged again. We can purge again after all of the conditions are ready


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until purging completed.

三、LOGIC DESIGN OF LEAKAGE TEST

Preconditions of leakage test:


1. Oil pressure normal

2. Oil trip-valve closed

3. Oil back-valve closed

4. All of the burner oil valves closed

5. OFT is coming or No MFT & pulverizers are

running

Start leakage test:

Start leakage test manually

Stop leakage test OR):

1. Operator stops leakage test manually

2. MFT is coming ( MFT occurs during the leakage test on the boiler running

normally)

3. Leakage test failure

4. Leakage test completed successfully

Step design of leakage test:

一, Open oil supply-valve

二, Oil supply-valve opened, open oil trip-valve

三, Oil trip-valve opened & oil back-valve closed, delay 15s , send out

signal to detect oil pressure .

1. “Leakage test failure” will be sent out when the oil pressure is not

normal, then stopping the leakage test(close the oil trip-valve).

2. “Close oil trip-valve” signal will be sent out if oil pressure is

normal after 45s delay.

四, Oil back-valve & oil trip-valve closed, “detect oil pressure” will besent out after 180s delay.

1. Oil pressure is higher or not(leakage may be caused by oil trip-valve)

2. Oil pressure is lower or not(leakage may be caused by oil back-valve

or burner oil valve)

3. “Leakage test failure” will be sent out to stop test if oil pressure

is higher or lower ,then oil supply-valve and oil back-valve will be

closed automatically.

4. Oil back-valve will be opened after 20s delay if the oil pressure is

normal


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五, After oil back-valve opened and oil trip-valve closed , oil pressure will

be detected after 10s delay

1. “Leakage test failure” will be sent out to stop test if oil pressure

is not low (leakage pressure high)

2. Oil back-valve will be closed after 25s delay if there is no failure

六, Alarm will be sent out if there is any failure in the test of oil trip-

valve or back-valve, then “Leakage test failure” will be sent out to

stop test

七, “Leakage test completed successfully” will be sent out after clicking

the “test bypass” button

八, If the leakage test is failed , we should check the cause , then start

test again by clicking the “start leakage test” button after reset the

test.九, The test will be stopped by clicking the “stop” button during the test,

and oil supply-valve and back-valve will be closed

Leakage test is of function to indicate the information and alarm about

process 、end of test

Fig. 3)


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1. MFT or OFT is coming ( leakage test is not running) Long

signal

2. Leakage test failure

Oil trip-valve will be controlled automatically during the leakage test

五、LOGIC DESIGN OF OIL BACK-VALVE

1. Oil back-valve will be controlled automatically during the leakage test

2. If the condition of OFT reset is ready, operator can reset OFT ,then oil

back-valve will be opened automatically

六、LOGIC DESIGN OF OFT

Conditions of OFT action

Condition OR) Remark

1. MFT(Long signal)

2. OFT manually

3.

Oil trip-valve or supply-valveis closed and burner valve is

not closed

4. Oil pressure is low during the

burner is running

Oil pressure is low after any burner

valve is opened

5. Any burner valve failure No opened or closed signal during 15s

After OFT is coming:

1. Close the oil trip-valve

2. Retract the oil gun and igniter

3.

Close all of the burner oil valves

Reset of OFT (AND):

1. All of the oil guns and burner oil valves are closed

2. Leakage test completed

3. No condition of OFT

4. Click “Reset OFT” button

As shown in Fig. (1) , the operation of OFT reset is same as the MFT reset.

七、LOGIC DESIGN OF OIL BURNER


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Function of system:

1, The system is of the function to control single oil gun, diagonal oil gun

or group oil gun automatically(there is no stop command and OFT during the

starting process)

2, Every oil gun can be ignited and stopped automatically after receiving the

signal

3, Starting of group oil gun:

a) Oil gun 1、2、3、4 are ready, then click the start button manually

b) First of all , No.1 oil gun will be started(3s pulse), No.3 oil gun

will be started after No.1 completed, then start No.2,No.4 as the same.

c)

“Stop” command will be sent out if there is any under condition:d) OFT, stop manually , any oil gun started failure, after sending out the

command to start the No.4 oil gun.

4, Starting of diagonal oil gun, such as oil gun No.1 & No.3

a) No.1 & No.3 oil gun are ready, then start diagonal oil gun signal

manually

b) No.1 oil gun will be started(3s pulse), No.3 oil gun will be

started(3s pulse) after No.1 completed

c) “Stop” command will be sent out if there is any under condition:

d)

OFT, stop manually , after sending out the command to start the No.4

oil gun.

5, Stopping of group oil gun:

a) Click the stop button manually

b) First of all , No.1 oil gun will be stopped, No.3 oil gun will be

started after 15s, then stop No.2,No.4 as the same.


d) OFT, after sending out the command to stop the No.4 oil gun.

6, Stopping of diagonal oil gun, such as oil gun No.1 & No.3

a) Click the stop button manually

b) First, send out command to stop No.1 oil gun, send out command to stop

No.3 oil gun after 15s


OFT, after sending out the command to stop the No.3 oil gun

Permissions of burner oil ignition:


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Condition AND) remark

1. Oil pressure is normal

2. Oil temperature is normal

3.

Oil trip-valve opened

4. MFT relay is reset

5. OFT relay is reset

6. Cooling air pressure is

normal

7. Air Flow > 30MCR

8. All of the burner nozzles are

horizontal or there is flame

in furnace

9.

Furnace purging completed0. aFurnace differ pressure is

norml

Logic design of Starting oil gun:

Permissions of starting oil gun automatically:Condition AND) Remark

1. Permission of burner oil ignition

2.

Burner oil valve closed3. Burner purge valve closed

4. Oil layer is remote

5. No forbidden command of burner oil

ignition

It is not allowed to ignite

again in 60s after it failed

Process of starting oil gun automatically:1. Oil gun is in the automatic mode, then send out signal “Oil gun is in

ignition mode”

2. Extend oil gun (no extended signal in ignition mode)

3.

Oil gun purging (oil gun extended in ignition mode) 20s4. Extend igniter (oil gun extended, purging completed) 15s

5. Open vapour steam valve ( igniter extended)

6. Open burner oil valve (vapour steam valve opened)

7. Ignition (burner oil valve opened, igniter extended, oil gun extended) 15s

8. Oil gun is in service (flame is detected, burner oil valve opened)

9. Delay Xs when oil gun is in ignition mode, program will be stopped when

burner oil valve is not opened , then oil gun will be retracted.


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10. If there is any under condition after oil gun and valve opened, program

will be stopped ,oil gun and valve will be closed automatically and

purging will be started:

Ignition failure Burner oil valve is not closed , there is no

flame can be detected after 15s

Burner oil valve failure Burner oil valve is not closed , there is no

opened signal after 5s

Oil gun is not extended Burner oil valve is not closed and oil gun

is not extended

Atomizing steam valve

failure

Atomizing steam valve not closed

Fuel trip OFT is coming

The logic of starting oil gun is of the function to alarm the first out MFT

memory

Logic design of stopping oil gun: After clicking the “stop” button to stop oil gun when oil gun is in service

and remote:

1. Send out command to extend igniter and close burner oil valve

2. Ignite after igniter extended (15s)

3.

Send out command to purge after burner oil valve is closed(20s)4. Retract oil gun after purging completed

5. Reset “stop oil gun” command after oil gun retracted

6. Program will be stopped if there is any device failure in the process, and

alarm

Purging logic design of oil gun:

1. Requirement of purging (Purging command will be sent out if there is any

under condition until purging completed)

Burner oil valve closed (when this oil layer is in remote and power is

normal , valve closes abruptly after normal opening)

Purge before when starting oil gun

Purge before when stopping oil gun

2. Open vapour steam valve : condition(AND)

a) Requirement of purging

b) Oil gun extended

c) No MFT signal

3. Oil gun purging completed


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The purging time will last 20s after vapour steam valve is opened , then

send out “purging completed” signal

4. If there is any under condition to send out purging stop signal, “Purging

stopped” signal will be sent out and vapurt steam valve will be closed:

1. Oil gun is not extended

2. MFT Long signal

3. OFT Long signal

4. Vapour steam valve open failure

If MFT or OFT is coming , burner oil valve will be closed , ignition will be

stopped , igniter and oil gun will be retracted.

As shown in Fig. (5) ,the burning status of oil gun and the first out of

tripping will be displayed in the picture , we can operate single oil gun tostart , stop , make it locally or remotely , and the same as diagonal oil gun

and group oil gun.


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Fig. (5)

八、PROGRAMME OF PULVERIZER LOGIC DESIGN

The condition of burn coal

condition AND) Remark

1. Hot air temperature more

than 160℃

2. Air flow more than 30%

3. MFT Reset

PROGRAM START CONDITION AND) REMARK

1. Pulverizer ignition

energy OK

border upon oil running

Or load more than 60% and any two

coal feeder running

2. Burn coal permission

3. No other program start

4. Pulverizer is not


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running

5. Any one seal fan running

6. P.A hand pressure>10KPa

Start description

Step of pulverizer group start

1,Start lube oil pump ,and require open border upon S.A damper.

After satisfied the condition as below go alone next operation

CONDITION (AND) REMARK

1. Lube oil station started

2. Pulverizer is not running

2, Open pulverizer seal air valve


1. Pulverizer seal air valve opened

2. Pulverizer seal air outlet valve

opened

3. Seal air and P.A differ pressure

not low

3, Open pulverizer outlet valve

CONDITION (AND) REMARK1，All pulverizer outlet valve

opened

4, Open pulverizer inlet cooling valve


1. Pulverizer inlet cooling valve

opened

2. All burner inlet valve opened

3.

Pulverizer seal air outlet valveopened

4. Seal air and P.A differ pressure not

low

5. Coal feeder seal air valve opened

6. Pulverizer oil station OK

7. Pulverizer ignition energy OK and

burn coal permission


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5, START PULVERIZER


1. Pulverizer inlet cool valve opened

2. All burner inlet valve opened

3. Pulverizer seal air outlet valve

opened

4. Seal air and P.A differ pressure not

low


6. Pulverizer ignition energy OK and

burn coal permission

7. No other group is running

8.

No flame

9. P.A pressure normal

6,OPEN PULVERIZER INLET HOT VALVE ,AND REGULATE PULVERIZER OUTLET

TEMPERATURE


1. Pulverizer cooling valve opened

2. pulverizer hot valve opened

3.

55℃


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9, Open coal feeder inlet valve


1，Coal feeder inlet valve opened

Pulverizer trip


1. MFT Emergency

trip

2. Operator trip Emergency

trip

3. Pulverizer outlet temperature

more than 100℃

Emergency

trip

4. Runbak Emergency

trip

5. P.A flow less than xxx delay 15s Emergency

trip

6. Pulverizer lube oil station

trouble

Emergency

trip

7.

Seal air and P.A differ pressurelow delay 15s

（1000Pa） Emergencytrip

8. Any one pulverizer outlet valve

not opened or any burner inlet

valve closed yet pulverizer

running

Emergency

trip

9. Ignition energy lost delay 5s Emergency

trip

10. Pulverizer outlet temperature >

90℃ delay 2s

Emergency

trip

11. Ignition failure Emergency

trip

Action after pulverize emergency trip Execute the step as below at the same time


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1. Stop coal feeder, close coal feeder inlet valve and outlet valve

2. Stop pulverizer, close pulverizer outlet valve

3.

Close pulverizer inlet cooling and hot valve

4. To MCS close cooling and hot regulate valve

Action after pulverize fast stop Execute the step as below

1. Close hot and cooling regulate valve to xx position

2. Stop coal feeder , close coal feeder inlet and outlet valve

3. Stop pulverizer

4. Close cooling and hot valve

5.

Close pulverizer outlet valve

Pulverizer trip reset : AND)

1. No pulverizer trip condition

2. Pulverizer ignition energy satisfied

3. Burn coal permission

4. Pulverizer hot valve closed

Stop pulverizer design

Program start permission


1, No pulverizer trip condition

1, Set coal feeder command at minimal value , Delay 60s


1. Coal feeder command at minimal value

delay 60s

2, Close coal feeder inlet valve



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2. Coal feeder inlet valve closed

3, Close hot valve and set cooling regulate valve to xx position


1. Pulverizer inlet hot valve closed,

2. Pulverizer outlet temperature < 65℃

4,Stop coal feeder


5, Close coal feeder outlet valve


1. Coal feeder outlet valve closed

6, Stop pulverizer


九、PULVERIZER SEAL AIR DAMPER LOGIC

Open permission

Any seal fan running

Close permission

Pulverizer stoped

Close interlock

Pulverizer outlet temperature > 100℃

十、BURNER INLET CUT OFF VALVE LOGICManual operation , the four valve can be operate at the same time by manual ,

each valve also can be operate singly ,when program start pulverizer

interlock burner inlet cut off valve.

十一、PULVERIZER OUTLET CUT OFF VALVE LOGIC


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The condition of open permission

No MFT

Close permission

1. Pulverizer not running

Inlet cut off valve of the burner can be operate by manual

十二、PULVERIZER INLET COOLING VALVE LOGIC


1. Pulverizer outlet valve opened

2.

No MFT3. Pulverizer seal air valve opened and seal air differ pressure not low

The condition of close permission

1, Pulverizer not running

十三、PULVERIZER INLET HOT VALVE LOGIC


1. Pulverizer outlet temperature less than 80℃

2. Pulverizer outlet valve opened

3. No MFT

4. Coal feeder seal air valve opened

十四、PULVERIZER LOGIC

The condition of start permission1. Pulverizer inlet cooling valve opened

2. All burner inlet cooling valve opened

3. Pulverizer seal air valve opened

4. Seal air and P.A differ pressure not low


6. Ignition energy satisfied and burn coal permission

7. No other program is running

8. No flame

9. P.A pressure normal


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The condition of stop permission

Pulverizer not running

十五、COAL FEEDER LOGIC

The condition of start permission

1. Coal feeder outlet valve opened

2. Coal feeder speed command at minimal value

3. P.A flow more than XXX

4. Pulverizer running

The condition of stop permission1,Coal feeder speed at minimal value

Coal feeder trip

1. Coal feeder trouble

2. Pulverizer trip

3. Coal feeder outlet valve not open

4. Manual stop

INTERLOCK AFTER COAL FEEDER TRIP

1. Close coal feeder inlet valve

2. Close coal feeder outlet valve

十六、COAL FEEDER OUTLET VALVE LOGIC


1, Pulverizer outlet temperature


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十九、COOLING FAN LOGIC Cooling air pressure low interlock start standby fan

Cooling fan A logic

Interlock stop

Cooling fan motor bearing temperature > x

Interlock start

Cooling fan B trip

Cooling fan A running and cooling air hand pressure low

Cooling fan B logic

Interlock stop

Cooling fan motor bearing temperature > x

Interlock start

Cooling fan A trip

Cooling fan B running and cooling air hand pressure low

二十、RUNBACK LOGIC （AS DISCUSS）

More than three pulverizer are running , when any two feeder water pumps or

air heater or air fan or two I.D fans or P.A fan trip ,then RUNBACK happen,

action as below.

（FSSS) RUNBACK ACTION

1. If there are six pulverizers are running ， then stop F 、 E and A

pulverizer and start BC oil gun combustion-supporting.

2. If there are five pulverizers are running：

a) If A、B、C、D、E pulverizers are running ，then stop A 、E pulverizer

and start BC oil gun combustion-supporting.

b) If A、B、C、D、F pulverizers are running ，then stop F 、A pulverizer

and start BC oil gun combustion-supporting.

c)

If A、B、C、E、F pulverizers are running ，then stop F 、E pulverizerand start AB oil gun combustion-supporting.

d) If A、B、D、E、F pulverizers are running ，then stop A 、B pulverizer

and start EF oil gun combustion-supporting.

e) If A、C、D、E、F pulverizers are running ，then stop A 、F pulverizer

and start CD oil gun combustion-supporting.

f) If B、C、D、E、F pulverizers are running ，then stop B 、F pulverizer

and start CD oil gun combustion-supporting.

3. If there are four pulverizers are running：


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a) If A、B、C、D pulverizers are running ，then stop A pulverizer and

start BC oil gun combustion-supporting.

b) If A、B、C、E pulverizers are running ，then stop E pulverizer and


c) If A、B、C、F pulverizers are running ，then stop F pulverizer and


d) If A、B、D、E pulverizers are running ，then stop E pulverizer and

start AB oil gun combustion-supporting.

e) If A、B、D、F pulverizers are running ，then stop F pulverizer and


f) If A、B、E、F pulverizers are running ，then stop F pulverizer and


g)

If A、C、D、E pulverizers are running ，then stop A pulverizer andstart CD oil gun combustion-supporting.

h) If A、C、D、F pulverizers are running ，then stop F pulverizer and

start CD oil gun combustion-supporting.

i) If A、D、E、F pulverizers are running ，then stop A pulverizer and

start EF oil gun combustion-supporting.

j) If B、C、D、E pulverizers are running ，then stop B pulverizer and


k) If B、C、D、F pulverizers are running ，then stop B pulverizer and


l)

If B、C、E、F pulverizers are running ，then stop B pulverizer and


m) If B、D、E、F pulverizers are running ，then stop B pulverizer and


n) If C、D、E、F pulverizers are running ，then stop F pulverizer and


o) If A、C、E、F pulverizers are running ，then stop A pulverizer and


fsss control

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