电极蒸汽锅炉系统安装使用维护说明.docx

1、电极蒸汽锅炉系统安装使用维护说明辅助锅炉房电锅炉项目系统安装使用维护说明备注:阶段设计出版日期2011-08-28包含项目设计说明文件审核图纸或图标0批准文件状态CFC总数CAD管理版次0递交文件号HYG-MB20-V7-YZDI024递交文件号HYG-MB20-V7-YZDI014资料名称系统说明版次日期设计审核批准CAD管理备注02011.08.28系统说明Table of Content目录1 Functions of the System系统功能 61.1 Safety classified functions安全分类功能 61.2 Operational Functions运行功能

2、62 General Description of the System系统一般说明 72.1 System系统 72.1.1 Feed water System (QHG) 给水系统 72.1.2 Evaporation System (QHA) 汽化系统 72.1.3 Blow down System (QHE) 排污系统 92.1.4 Chemical Dosing System (QCC, QCF) 化学加药系统 92.1.5 Sampling System (QUB) 取样系统 102.1.6 Compressed / Instrument Air System (QHP) 压缩空气

3、/仪表系统 102.2 Main Components主要部件 112.2.1 Deaerator/Feed water tank除氧器/给水箱 112.2.2 Feed water pumps给水泵 112.2.3 Boilers锅炉 112.2.4 Circulation pumps循环泵 122.2.5 Make-up water pumps补水泵 122.2.6 Blow down tank排污罐 123 Operation of the system系统运行 133.1 Normal system operating conditions系统正常运行工况 133.2 Abnormal

4、 system operating conditions系统异常运行工况 143.3 Normal plant operating conditions电站正常运行工况 153.4 Abnormal plant operating conditions电站异常运行工况 153.4.1 Effects on the ASGS at failure or malfunctions in associated systems因ASGS故障或辅助系统故障产生的影响 154 System Design系统设计 164.1 General Design Basis总体设计基础 164.1.1 Codes

5、and Standards规范和标准 164.1.2 Safety Classification安全等级 164.1.3 Safety related design criteria相关安全设计标准 164.1.4 Protection against Internal Hazards内部危害防护 164.1.5 Protection against external hazards外部危害防护 174.1.6 Ambient conditions环境条件 174.2 Component Design Basis部件设计基础 174.3 Installation安装 184.4 Materia

6、ls材料 184.5 Electrical and Control Equipment电气和控制设备 184.5.1 Automatic Control and On/Off Functions自动控制和开关功能 194.5.1.1 Boiler锅炉: 194.5.1.1.1 Start & stop sequences启停顺序 194.5.1.1.2 Pressure, power and level control of boiler锅炉的压力 204.5.1.1.3 Circulation pump循环泵 214.5.1.1.4 Volume control of boiler锅炉水量调

7、节 224.5.1.1.5 Feed water pump给水泵 234.5.1.1.6 Min. boiler pressure and reduced pressure最小锅炉压力和减压 234.5.1.1.7 Conductivity control导电性控制 244.5.1.1.8 Bottom blow down (sludge removal) 锅炉底部排污（污泥清除） 254.5.1.1.9 Deaerating the boiler锅炉排气 254.5.1.1.10 Warm up valves steam line蒸汽管道上的暖管阀 264.5.1.1.11 Cooling

8、the protective cage安全箱的冷却 264.5.1.1.12 Heating of boiler during hot standby锅炉热备用期间加热 274.5.1.2 Feed water tank:除氧器: 274.5.1.2.1 Pressure control of feed water tank除氧器压力的控制 274.5.1.2.2 Level control of feed water tank and makeup water pumps除氧器和补水泵的液面控制 284.5.1.2.3 Overflow control of feed water tank除

9、氧器的溢流控制 294.5.1.2.4 Standby operation备用操作 294.5.1.2.5 Deaerating排气 294.5.1.3 Water treatment (Dosing): 水处理（加药） 304.5.1.3.1 Hydrazine, (N2H4) 联氨 304.5.1.3.2 Trisodium Phosphate, (crystallized 98% Na3PO4 +12H2O) 磷酸三钠，（98%的结晶Na3PO4 +12H2O） 304.5.1.3.3 Blow down tank cooling排污罐冷却 314.5.2 Measurements其他

10、314.5.3 Alarm functions报警功能 344.5.3.1 Common for ASGS ASGS的常见状况 374.5.3.2 Boilers锅炉 374.5.3.3 Feed water tank除氧器 374.5.3.4 Dosing tanks加药罐 374.5.4 Signal Exchange towards MCR指向MCR的信号交换 394.6 Associated Systems相关系统 495 General operational aspects一般操作方面 506 Technical System Specification系统技术规范 517 Ref

11、erences参考文献 538 Appendices附录 54 1.Functions of the System系统功能描述1.1 perational Functions使用功能The Auxiliary steam generating system (QH), by means of two medium voltage electrode boilers, supplies steam to the auxiliary steam system during main plant outage, start-up and shutdown, when steam from the m

12、ain steam system, or other sources, is not available.本辅助蒸汽系统（QH系统）采用两台中压电极锅炉在总电站运行中断、开启、停止期间，以及主蒸汽系统或其他来源的蒸汽不可用时，向辅助蒸汽系统提供蒸汽。In order to achieve the required fast startup and steam production, the system will normally be in standby operation, at normal operational pressure and temperature by means o

13、f low voltage electrical elements (immersion heaters) fitted in the boilers and feed water tank. 为达到快速启动和产生蒸汽要求，本系统通常会处于备用状态，维持正常操作压力和温度。这些工作将由安装在锅炉和除氧器内的380V低压电气元件（备用加热器）完成。2General Description of the System系统一般说明2.1 System系统说明2.1.1Feed water System (QHG)锅炉给水系统（QHG系统）Make-up water, demineralized wa

14、ter (QHC) is fed to the feed water tank (00QHJ10 BB010) by make-up water pumps to the sprayer, which is part of the feed water tank. 除氧器（00QHJ10 BB010）的补水是除盐水（QHC系统），是由补水泵（00QHC11 AP001/00QHC12AP001）和除氧器喷嘴之间的设备完成的。Excess steam/gas flows from the deaerator through a pipe that connects with the safety

15、 valves blow-off pipe. A manually shut-off valve (00QHJ10 AA002) on this pipe will be closed after when there is no filling of the tank. Two orifice plates (00QHJ10 BP003/004) is fitted to optimize the flow of the excess steam. During standby operation the valve is closed, in order to save energy.除氧

16、器内的过量蒸汽及其他气体通过排气管道排出。在除氧器内充水后，此管道上的手动切断阀(00QHJ10 AA002)关闭。两个孔板(00QHJ10 BP003/004)将调整成最有利于过量蒸汽排出的状态。为了节能，在设备备用期间此阀门将处于关闭状态。The feed water tanks water level is maintained by regulating the control valve (00QHC10 AA003) for the demineralized makeup water to the feed water tank. Control signal 0-100% re

17、gulates the makeup water valve 0-100%.除盐补水在除氧器内的水位是通过调节控制阀(00QHC10 AA003)来维持的。控制信号0-100%调节补水阀0-100%。The feed water tanks pressure, and indirect its temperature, is maintained by regulating the control valve (00QHF30 AA004) for the steam from the boilers to the feed water tank.通过调节锅炉供给除氧器蒸汽的调节阀，可保持除氧

18、器的压力及对应的温度。The steam is lead to the bottom of the tank and passed through spreader pipes which create a circulation and thus a good mixing in the tank. 除氧蒸汽通过除氧器内扩散器管道从除氧器底部进入除氧器，这样有利于蒸汽与水的充分混合。One pressure relief valve (safety valve 00QHJ10 AA010) is fitted on the tank to prevent an excess pressure

19、 in case there is a problem with the pressure control. 除氧器安装一个安全阀（安全阀00QHJ10 AA010），用于防止压力控制出现问题时造成的超压事故。The water is pumped from the feed water tank to the respective boiler by the feed water pumps.从除氧器内出来的水再由给水泵输送到各自应流向的锅炉内。There is one pump for each boiler (00QHG11 AP001 and 00QHA12 AP001). Each

20、pump is designed for 100% of the flow.每台锅炉都配有一台给水泵(00QHG11 AP001 和 00QHA12 AP001)，每台泵都按100%的流量设计。The selected feed water pump is running continuously during normal operation. If the selected pump fails and shuts down, the spare pump (00QHG13AP001) will automatically start. Correspondingly the on-off

21、 valve 00QHG14AA001 opens to boiler 00QHA10AC010 and on-off valve 00QHG15AA001 opens to boiler 00QHA20AC010.设备正常运行期间，给水泵是连续运行的。如果给水泵不能正常工作，则备用泵(00QHG13AP001)会自动启动。相对应的，备用切换开关阀00QHG14AA001为锅炉00QHA10AC010开启，而备用切换开关阀00QHG15AA001对应锅炉00QHA20AC010开启。During standby or if the boiler pressure is below a set

22、value the feed water control valve (00QHG11/12 AA006) is closed before a pump is started and the opening of the valve is reduced to a set value to remove the risk for cavitations in the pump due to high flow.在设备备用期间或当锅炉压力低于设定值时，开启另一个泵之前，给水控制阀(00QHG11/12 AA006)将关闭，同时阀门的开度会调整到一个设定值，以避免给水泵带来的汽蚀危险。Durin

23、g standby operation the feed water pump fills the boiler between two water volume set points.设备运行期间，给水泵的给水量处于两个水量设定值之间。Each pump has a minimum flow valve (00QHG11/12/13 AA003), which secures the pumps minimum flows. The min flow valves will open automatically at set pressure and the water is pumped

24、back to the feed water tank.给水泵有最低流量阀(00QHG11/12/13 AA003)，用于维持泵的最小流量。在设定压力下，最低流量阀将自动开启，然后水会被泵回除氧器内。An on/off valve (00QHE16AA002), fitted below the tank, acts as overflow protection: 安装在除氧器底部的开关阀(00QHE16AA002)起到溢流的作用：If the feed water tank water level should reach the set high limit, this valve wil

25、l open until the level is below the set value for closing the valve. 如果除氧器内的水位达到了最高上限，则此开关阀会开启，直到水位低于设定值后再自动关闭。During standby operation the feed water tank is kept warm and pressurized by two electric elements (00QHJ10 AH001/AH002, 2x50% capacity), which are engaged at the set limit (on/off control)

26、. To ensure the fastest possible start-up, the set limit for warm keeping will be equal to operational temperature. 设备备用期间，除氧器的保温和保压工作由两个电器元件(00QHJ10 AH001/AH002, 2x50KW)完成，这两个电加热器温控运行（开关控制）。为保证最快速度的开启设备，保温的设定限制将约等同于供气温度。The feed water tanks pressure, and indirect its temperature, is maintained by r

27、egulating the control valve (00QHF30 AA004) for the steam from the boilers to the feed water tank.通过调节锅炉供给除氧器蒸汽的调节阀，可保持除氧器的压力及对应的温度。The steam is lead to the bottom of the tank and passed through spreader pipes which create a circulation and thus a good mixing in the tank. 除氧蒸汽通过除氧器内扩散器管道从除氧器底部进入除氧器，

28、这样有利于蒸汽与水的充分混合。One pressure relief valve (safety valve 00QHJ10 AA010) is fitted on the tank to prevent an excess pressure in case there is a problem with the pressure control. 除氧器安装一个安全阀（安全阀00QHJ10 AA010），用于防止压力控制出现问题时造成的超压事故。The water is pumped from the feed water tank to the respective boiler by t

29、he feed water pumps.从除氧器内出来的水再由给水泵输送到各自应流向的锅炉内。There is one pump for each boiler (00QHG11 AP001 and 00QHA12 AP001). Each pump is designed for 100% of the flow.每台锅炉都配有一台给水泵(00QHG11 AP001 和 00QHA12 AP001)，每台泵都按100%的流量设计。The selected feed water pump is running continuously during normal operation. If t

30、he selected pump fails and shuts down, the spare pump (00QHG13AP001) will automatically start. Correspondingly the on-off valve 00QHG14AA001 opens to boiler 00QHA10AC010 and on-off valve 00QHG15AA001 opens to boiler 00QHA20AC010.设备正常运行期间，给水泵是连续运行的。如果给水泵不能正常工作，则备用泵(00QHG13AP001)会自动启动。相对应的，备用切换开关阀00QH

31、G14AA001为锅炉00QHA10AC010开启，而备用切换开关阀00QHG15AA001对应锅炉00QHA20AC010开启。During standby or if the boiler pressure is below a set value the feed water control valve (00QHG11/12 AA006) is closed before a pump is started and the opening of the valve is reduced to a set value to remove the risk for cavitations in the pump due to high flow.在设备备用期间或当锅炉压力低于设定值时，开启另一个泵之前，给水控制阀(00QHG11/12 AA006)将关闭，同时阀门的开度会调整到一个设定值，以避免给水泵带来的汽蚀危险。During standby operation the feed water pump fills the boiler between two water volume set points.设备运行期间，给水泵的给水量处于两个水量设定值之间。Each pump has a minimum flow