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1、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 s
2、hutdown. 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
3、, 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）。T
4、he 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 lo
5、ng 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 set
6、point 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 system11 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
7、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
8、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 stac
9、k.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 clo
10、sed. 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 dam
11、pers. 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. 12 控制设备 control equipment1）原烟气挡板 inlet damper2）净烟气挡板 outlet damper3）旁路烟气挡板bypass damper4）吸收塔排气挡板门 absorber exhaust da
12、mper5）密封风机A/B seal air fan A/B6）密封风加热器 seal air heater7）增压风机及其辅助设备 booster fan(BUF) and assistant equipmenta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
13、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 fan8）GGH及其辅助设备 GGH and assistant equipmentaGGH驱动电机A/B GGH drive motor A/BbGGH密封风机 GGH seal fancGGH低泄漏风机 purge fan of GGHd低泄漏风机入口调节门 the inlet damper of purge fane高压水泵 high pressure water
14、pumpf高压水泵启动旁路门 bypass valve of high pressure pumpg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
15、air fan of blower)131 烟气系统启动 flue gas group start允许条件：Permissive condition1）吸收塔再循环泵运行（至少3台泵运行）at least 3 absorber recirculation pumps running2）无MFT指令 NO instruction of MFT3）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 closed5）净烟气挡板关 outlet damper is closed6）旁路烟气挡板开bypass damper is opened7）吸收塔排气挡板门开absorber exhaust damper is opened8）增压风机润滑油系统正常 BUF lube oil system is in order9）增压风机液压油系统正常 BUF hydraulic oil system is in order10）11）GGH停止 GGH has stopped12）干湿界面冲洗程序停止 dry/wet interface wash program has stopped13）除雾器冲洗程序停止 ME wash pro
