天津大港工程FGD控制说明第五版.doc

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命运如同手中的掌纹，无论多曲折，终掌握在自己手中
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天津大港烟气脱硫工程（NTF）

控制说明

版次： 第四五版
编写：
审核：
批准：

华电环保系统工程有限公司
2005年78月025日

天津大港工程FGD控制说明
Logic narrative of NTF project

本说明针对大港电厂脱硫系统及相关设备的控制和顺序启动。所有浆液管道在停运时都需要用工艺水冲洗。一些设备由于不经常使用，冲洗阀门为手动门，当管道需要冲洗时，由运行人员就地操作。
This narrative refers the logic and sequence of FGD devices. All slurry pipes should be washed when they are shutdown. Some pipes, being seldom used, be washed in field.
本说明仅以一套FGD系统为例，包括单台机组及公用系统。
This document only describes one set of FGD as example, which includes one unit and facilities.
以下联锁说明，对每种设备当其具有多台、套时，都以设备A（或A组）进行说明，包括描述联锁逻辑和启动步序（其它设备的操作同A设备，如有不同将单独列出）。
When there are redundant equipments or sets, the narrative of interlock for them should see the one for unit A or group A, i.e., see the narrative of interlock logic and start procedures, or be specially described for exception of difference from A.
对同一设备的操作条件可能由多个条件进行逻辑组合。在本说明中：允许条件为所有条件相与（即必须满足所有条件后，才可人工进行操作）；自动条件为所有条件相或（即满足任意一条均会产生自动指令）。
The operation conditions are composed of many logics. In this document: the permissive condition is all of items have been satisfied. The auto condition is one of item has been satisfied.
设备故障状态闭锁该设备操作。
Any equipment should not be operated when it is fault.
如无特别说明，所有设备在满足允许操作调节下，操作人员可根据具体情况手动操作该设备。
As long as the start permissive condition is satisfied, any equipment may be manually operated by operator according to specific occasion
顺序控制按照顺序执行，当前一步完成后执行下一步。
any equipment should be operated following the sequence items one by one.
说明中关于工艺过程设定点的具体值参见设定值清单。
The setpoint data of process will refer the setpoint list.
本说明不包括业主供货设备的说明（包括石灰石卸料、储运、石膏输送）。
This document does not include narrative offered by the owner (unloading and storing limestone, transferring gypsum).
1． 烟气系统Flue gas system
1．1 系统说明intruduction

烟气系统起到对烟气引导、热交换的作用。
This system will function to induct the flue gas and to transfer heat.
正常情况下，原烟气在引风机出口汇合，然后经增压风机升压，由原烟气管道引入GGH原烟气侧，经GGH降温（将热量传递给净烟气）后，进入FGD脱硫塔与石灰石浆液反应。反应后净烟气从脱硫塔顶部引出到GGH净烟气侧，经GGH加热后由净烟气管道排入烟囱。
In a normal case, flue gas will converge together at the rear of IDF, and then be pressured by BUF. after that flue gas will be inducted into the original flue gas side of GGH, so the gas temperature will decline (heat will be transfer from flue gas to clean gas finally, the flue gaswill react with limestone slurry in absorber to make clean gasinducted from top of absorber to the clean side of GGH. after heated at GGH, clean gas will exhausted through the clean gas duct into the stack.
故障情况（原烟气异常或FGD岛设备异常需要紧急停止）下，旁路烟气挡板紧急打开，原烟气挡板、净烟气挡板紧急关闭。在引风机出口汇合的原烟气，由旁路烟气管道直接引入烟囱，排入大气。
In case of breakdown (the FGD need to stop in emergency because the original flue gas or any equipment of FGD is out of the way), bypass damper should be opened, both inlet damper and outlet damper should be closed. Converging at the rear of IDF, the flue gas will directly come into the stack through the opened bypass damper and finally discharge into air
原烟气挡板、净烟气挡板、旁路烟气挡板采用双挡板型式。挡板中间通以密封风以保证挡板对隔绝气体的泄漏为零。为防止烟气挡板上结露，密封风需要经电加热器加热，密封风温度保证在120℃。
Inlet damper, outlet damper and bypass damper are double louver dampers. The seal air will be full of dampers to ensure there is no leakage from flue gas to clean gas. Seal air should be heated to prevent concreting with constant temperature of 120℃.
1．2 控制设备 control equipment
1）原烟气挡板 inlet damper
2）净烟气挡板 outlet damper
3）旁路烟气挡板bypass damper
4）吸收塔排气挡板门 absorber exhaust damper
5）密封风机A/B seal air fan A/B
6）密封风加热器 seal air heater
7）增压风机及其辅助设备 booster fan(BUF) and assistant equipment
a．增压风机 booster fan
b．增压风机润滑油泵A/B lube oil pump A/B
c．增压风机润滑油加热器A/B lube oil tank heater A/B
d．增压风机调节油泵A/B hydraulic oil pump A/B
e．增压风机调节油加热器A/B hydraulic oil tank heater A/B
f．增压风机进气箱加热器A/B booster fan inlet box heater A/B
g．增压风机密封风机A/B/C seal air fan A/B/C of booster fan
h．增压风机密封风加热器 seal air heater of booster fan
8）GGH及其辅助设备 GGH and assistant equipment
a．GGH驱动电机A/B GGH drive motor A/B
b．GGH密封风机 GGH seal fan
c．GGH低泄漏风机 purge fan of GGH
d．低泄漏风机入口调节门 the inlet damper of purge fan
e．高压水泵 high pressure water pump
f．高压水泵启动旁路门 bypass valve of high pressure pump
g．吹灰器就地控制设备（控制设备——高压水电动截止阀、清洗设备系统气动截止阀、吹灰器推进电机、吹灰器密封风机）。local control equipments of Soot blower ( control equipments: the inlet electrical valve of high pressure water pump, the pneumatic valve of clean equipment, the drive motor of blower, and the seal air fan of blower)
1．3．1 烟气系统启动 flue gas group start
允许条件：Permissive condition
1）吸收塔再循环泵运行（至少3台泵运行）at least 3 absorber recirculation pumps running
2）无MFT指令 NO instruction of MFT
3）增压风机导叶在最小位 the blade is at the minimum position
4）原烟气挡板关 inlet damper is closed
5）净烟气挡板关 outlet damper is closed
6）旁路烟气挡板开bypass damper is opened
7）吸收塔排气挡板门开absorber exhaust damper is opened
8）增压风机润滑油系统正常 BUF lube oil system is in order
9）增压风机液压油系统正常 BUF hydraulic oil system is in order
10）
11）GGH停止 GGH has stopped
12）干湿界面冲洗程序停止 dry/wet interface wash program has stopped
13）除雾器冲洗程序停止 ME wash program has stopped
启动顺序：start sequence
1）启动GGH GGH start
2）开净烟气挡板 outlet damper open
3）关吸收塔排气挡板门 absorber exhaust damper close
4）启动增压风机 BUF subgroup start
5）开原烟气挡板 inlet damper open
启动GGH低泄漏风机，启动干湿界面冲洗程序，启动除雾器冲洗程序待风机运行正常后，关旁路烟气挡板（旁路烟道挡板关闭时应保证与增压风机的导叶调整相配合）
GGH purge fan start, dry/wet interface wash program start, and ME wash program start after BUF is -in order, bypass damper close ( the process of bypass damper close will cooperate with the tune of BUF blade).
1．3．2 烟气系统停止 to stop flue gas system group
允许条件：Permissive condition
1）增压风机运行 BUF running
2）旁路烟气挡板关闭 bypass damper closed
3）原烟气挡板开 inlet damper opened
4）净烟气挡板开 outlet damper opened
5）吸收塔排气挡板门关 absorber exhaust damper closed
6）GGH低泄漏风机运行 GGH purge fan running
7）干湿界面冲洗程序运行（定时冲洗程序启动）dry/wet interface wash program running ( time wash program running)
8）除雾器冲洗程序运行（定时冲洗程序启动） ME wash program running (time wash program running)
停止顺序：stop sequence
1）开旁路烟道挡板 bypass damper open
2）停增压风机 BUF stop
3）增压风机停止正常后（满足厂家要求），关原烟气挡板，关净烟气挡板 inlet damper and outlet damper will close after the BUF stop normally
4）停GGH（详见厂家资料），开吸收塔排气挡板门 GGH stop (see vendor’s operator manual), and absorber exhaust damper open

1．3．3 FGD系统紧急停止 stop FGD in emergency
条件：initiator to stop in emergency
1）通过FGD的烟气温度高高（三取二），延时5s inlet gas temperature HH ( at least two of three sample signals)has lasted for 5s.
2）通过FGD的烟气压力高高（三取二），延时5s inlet gas pressure HH ( at least two of three sample signals) has lasted for 5s.
3）通过FGD的烟气压力低低（三取二），延时5s inlet gas pressure LL ( at least two of three sample signals)has lasted for 5s.
4）锅炉MFT（三取二）MFT ( at least two of three sample signals)
5）增压风机故障停（三取二）BUF fault stop ( at least two of three sample signals)
6）GGH加热器停止（主、辅助驱动电机均停延时10秒） GGH stop (both the lead and standby drive motor have stopped for 10s)
7）吸收塔循环泵均停 all absorber recirculation pump have stopped
8）运行人员紧急停止命令 the instruction to stop in emergency for operator
急停动作： Sequence to urgently stop
1）开旁路烟气挡板 bypass damper open
2）待旁路烟气挡板打开后：（同时动作）after the bypass damper open, the follow sequence will be carried out atthe same time.
停增压风机 BUF stop
关原烟气挡板 inlet damper close
关净烟气挡板 outlet damper close
开吸收塔排气挡板门 absorber exhaust damper open
当紧急停止信号是由FGD的烟气温度高高或吸收塔循环泵均停引起的，当旁路挡板关指令发出30s后如果挡板未打开，紧急启动第2步。
当紧急停止信号是由运行人员紧急停止命令引起的，当旁路挡板关指令发出20s后如果挡板未打开，紧急启动第2步。
1．3．4 事故喷水 accident quench spray
条件：initiator of emergency quench spray
1）通过FGD的烟气温度高引起FGD紧急停止 inlet gas temperature HH has given rise to stop the FGD in emergency
2）吸收塔循环泵均停引起FGD紧急停止all absorber recirculation pump have stopped so that the FGD stopped in emergency
动作：spray sequence
1）开吸收塔入口段事故减温门 emergency spray valve open

1.4 控制与联锁 control and interlock
1．4．1 原烟气挡板 inlet damper
1．4．1．1 概述 introduction
原烟气挡板设置在原烟气管道与增压风机之间，起到隔绝原烟气进入脱硫装置的作用。 The inlet damper is installed between the flue gas duct and BUF to isolate the original flue gas from FGD.
1．4．1．2 控制 control
开允许：permissive condition to Permissive conditions to open
1）原烟气温度不高 inlet flue gas temperature is not high
关允许：permissive condition to Permissive conditions to closepermissive condition to close
1）旁路烟气挡板已开 bypass damper has opened
自动关：initiator to close
1）FGD紧急停止 FGD has stopped i n emergency
（在FGD紧急停止时，自动开旁路烟气挡板，待旁路挡板打开后，关原烟气挡板。）
(In this case, bypass damper opens automatically at first, then bypass damper opens, and at last inlet damper closes)
1．4．2 净烟气挡板 outlet damper
1．4．2．1 概述 introduction
净烟气挡板设置在净烟气管道上，起到FGD系统旁路运行时隔绝原烟气倒流入脱硫装置的作用。
Outlet damper is installed inside clear gas duct, and prevent the original flue gas to reversely flow into FGD when bypass system of FGD is running.
1．4．2．2 控制 control
开允许：Permissive conditions to open to open
1）原烟气温度不高 inlet flue gas temperature is not high
关允许：Permissive conditions to closepermissive condition to close to close
1）旁路烟气挡板已开 bypass damper has opened
自动关：initiator to close
1）FGD紧急停止FGD has stopped in emergency
（以上条件发生时，自动开旁路烟气挡板，待旁路挡板打开后，关净烟气挡板。）
(In this case, bypass damper opens automatically at first, then bypass damper opens, and at last inlet damper closes
1．4．3 旁路烟气挡板 bypass damper
1．4．3．1 概述 introduction
旁路烟气挡板设置在旁路烟气管道上，当FGD系统不运行时，引导烟气直接进入烟囱排放。
Bypass damper is installed between the bypass gas duct and the stack. The flue gas will directly flue into the stack through the bypass duct when the FGD stops.
1．4．3．2 控制 control
关允许：Permissive conditions to closePermissive condition to close to Close
1）FGD系统已运行（原烟气挡板开，净烟气挡板开，增压风机已运行，有浆液循环泵运行）
FGD is running (inlet damper opened, outlet damper opened, BUF is running and any absorber recirculation pump is running).
自动开：Initiator to open
1）FGD紧急停止 the FGD has stopped in emergency
2）FGD旁路挡板差压HH the bypass damper difference pressure is HH
3）FGD旁路挡板差压LL the bypass damper difference pressure is LL

1．4．4 吸收塔排气挡板门 absorber exhaust damper
1．4．4．1 概述 introduction
吸收塔排气挡板门设置在吸收塔上，当增压风机停止时自动打开，泄放吸收塔内压力。
The absorber exhaust damper is installed in the top of absorber. It will open automatically to decrease the pressure of absorber
1．4．4．2 控制 control
开允许：Permissive conditions to open to open
1）FGD停止（原烟气挡板关，净烟气挡板关，旁路烟气挡板开）
FGD has stopped (inlet damper closed, outlet damper closed and bypass damper opened)
关允许：Permissive conditions to closepermissive condition to close to close
1）原烟气挡板已关 inlet damper closed
2）净烟气挡板已关 outlet damper closed
自动开：initiator to open
1）增压风机停止 BUF has stopped
1．4．5 密封风机（以A风机为例）seal air fan take the A fan for example)
1．4．5．1 概述 introduction
为原烟气挡板、净烟气挡板、旁路烟气挡板提供密封空气。
每一个带密封空气的挡板在挡板的密封空气侧设一个压力开关以监视挡板的密封情况。
带密封空气的挡板设机械联动型密封风控制门，通过机械连接，实现密封风控制门的操作（挡板关闭时，密封风门开启；挡板打开时，密封风门关闭）。
两台密封风机为一用一备。
The seal air fan provides inlet damper, outlet damper and bypass damper.with seal air
each damper has a pressure switch on seal air side to monitor the effect of sealing.
each damper has a mechanical interlock valve interlocked with damper to control seal air( the damper has closed, the seal valve should consequently open; vice versa).
In general, one of two seal air fans should be spare when the other one is running
1．4．5．2 控制control
停止允许：Permissive conditions to stop to stop
1）烟道中无烟气延时5min，不再需要空气密封（由运行人员确定）。There is no flue gas in the duck within continuous 5min.（this condition will be confirm by operator）
自动启动：initiator to start
1）B风机运行，A风机备用，密封风出口压力低，延时5s，启A密封风机，停B密封风机When seal fan B is running, fan A is spare and the seal air pressure of fan’s outlet is keeping low for 5s. Then fan A will start, fan B will stop.
2）密封风机B电气故障。Fan A standby, fan B with electrical fault.
备用状态： standby model select
1）A风机正常，由运行人员手动设置。Only when fan A is running normally, the operator manually set fan B on standby.
1．4．6 密封风加热器 seal air heater
1．4．6．1 概述 introduction
加热密封空气，以保证密封风温度高于露点温度。密封风加热器的温度设点在就地加热器控制箱。
It heats the seal air and prevents the gas from condensation. The temperature of heater is local controlled
1．4．6．2 控制 control
启动允许： permissive condition to start
1）密封风机运行 seal fan is running
自动启动：initiator to start
1）有任意密封风机运行 any seal fan running.
自动停止：initiator to stop
1）任意密封风机均停 all of seal fan stopped.

1．4．7 增压风机及其辅助设备（具体操作以风机厂资料为准）BUF and assistant equipments (to refer the vendor manual for the detail description)
1．4．7．1 概述 introduction

增压风机对烟气进行增压以克服FGD工艺系统的阻力。The BUF has been designed to boost the gas pressure from ID fan to prevent FGD system’s pressure from loss .
1．4．7．2 控制 control
启动允许： permissive condition to start
1）风机润滑油系统正常 lube oil system is normal
2）风机调节油系统正常 hydraulic oil system is normal
3）风机密封风机运行 the seal fan of BUF is normal
4）风机轴承温度正常 the bear temperature of BUF is normal
5）风机电机轴承温度正常 the bear temperature of BUF motor is normal
6）风机电机线圈温度正常the winding temperature of BUF motor is normal
7）风机导叶在最小位 the blade is at the minimum position
8）净烟气挡板开 outlet damper is opened
停止允许：Permissive conditions to stop to stop
1）风机导叶在最小位 the blade is at the minimum position
自动停止：initiator to stop
1）风机电机轴承温度高高（大于100℃）BUF motor bear temperature is at the position of HH
2）风机电机线圈温度高高 BUF motor winding temperature is at the position of HH
3）风机失速（当风机导叶小于42°时，时速报警无效），延时120s BUF stall (when the blade angle <42°, the stall signal will be canced) , delay has being continuously stalling for 120s
4）风机振动大（大于80μm）vibration value of BUF is more than 80μm
5）密封空气压力低，延时240min the BUF seal air pressure has been continuously low for 240min
6）风机轴承温度高高 the bear temperature of BUF is HH
由运行人员在5min内判断，手动停止：initiator to manually stop by operator within 5 min.
1）润滑油流量低1且风机轴承温度高 lube oil flow L1 and the BUF bear temperature is at the position of H
2）润滑油流量低2 the flux of lube oil is L2
3）液压油压力低延时20min hydraulic oil pressure is keeping low for 20min. 4）液压油温度大于55℃延时60min hydraulic oil temperature is keeping over 55℃, for 60min
5）液压油温度大于60℃ hydraulic oil temperature is keeping over 60℃for 60min
1．4．7．3 增压风机润滑油泵A/B lube oil pump A/B
两台增压风机润滑油泵为一用一备。one of two lube oil pumps is running and one is spare on standby.
启动允许： permissive condition to start
1）润滑油箱油位正常 lube oil tank oil level is normal
2）润