300MW锅炉SCS顺控启停说明汉英

锅炉顺控设计说明Boiler Sequence Control Design Description（调试版）(Version 1.0) 目 录 Index一、概述 Overview4二、设计说明 Design Description41、锅炉部分Boiler4、锅炉烟风系统Boiler flue-gas system4111、顺控逻辑如下：Squence control logics41）、空预器A组顺控投用逻辑如下：（A/B侧相同）4A Air Preheater Group sequence control ON logics (A / B side of the same)42）、空预器A组顺控停用逻辑如下：（A/B侧相同）5A Air Preheater Group sequence control OFF logics (A / B side of the same)53）、引风机 A组顺控投用逻辑如下：（A/B侧相同）6A ID Fan group sequence control ON logics (A / B side of the same)4）、引风机 A组顺控停用逻辑如下：（A/B侧相同）7A ID Fan group sequence control OFF logics (A / B side of the same)5）、送风机 A组顺控投用逻辑如下：（A/B侧相同）7A FD Fan group sequence control ON logics (A / B side of the same)6）、送风机 A组顺控停用逻辑如下：（A/B侧相同）8A FD Fan group sequence control OFF logics (A / B side of the same)7）、一次风机 A组顺控投用逻辑如下：（A/B侧相同）8A PA Fan group sequence control ON logics (A / B side of the same)8）、一次风机 A组顺控停用逻辑如下：（A/B侧相同）9A PA Fan group sequence control OFF logics (A / B side of the same)112、设备级逻辑：（A、B侧逻辑一样）10Logics for device level (A/B side of the same)1）、送风机A10A FD Fan 2）、送风机A出口风门11Outlet damper of A FD Fan3）、送风机A油站加热器12Oil station heater of A FD Fan4）、送风机A油泵1121# Oil pump of A FD Fan5）、送风机A油泵2122# Oil pump of A FD Fan6）、送风机出口联络风门13outlet connection damper of FD Fans 7）、引风机A13A ID Fan8）、电除尘器A出口烟气挡板14Outlet flue-gas damper of A precipitator9）、引风机A出口烟气挡板14Outlet flue-gas damper of A ID Fan 10）、引风机A冷却风机1151# Cooling Fan of A ID Fan11）、引风机A冷却风机2152# Cooling Fan of A ID Fan12）、空预器A主马达16Main motor of A Air Preheater13）、空预器A辅助电机16Service motor of A Air Preheater14）、空预器A烟气入口挡板17Flue-gas Inlet damper of A Air Preheater15）、空预器A出口一次风档板17Primary Air damper of A Air Preheater outlet16）、空预器A二次风档板17Secondary Air damper of AAir Preheater17）、空预器A支持轴承油泵18Journal-bearing oil pump of A Air Preheater18）、空预器A导向轴承油泵18Guide bearing oil pump of A Air Preheater19）、一次风机A18A PA Fan20）、一次风机A出口档板19Outlet damper of A PA Fan21）、一次风机A油站20Lube Oil Station of A PA Fan22）、A侧冷一次风档板20A side cool primary air damper23）一次风机出口联络挡板20connection damper of PA Fan outlet、锅炉汽水部分Boiler steam-water systemt20121、汽水系统设备级逻辑如下20Logics for device level1）、省煤器进口集箱疏水阀（单操）20Drain valve of economizers inlet collecting header (manually operated)2）、给水操作台疏水阀（单操）20Drain valve of feedwater console (manually operated)3）、顶棚过热器入口集箱疏水阀（单操）20Drain valve of ceiling superheaters inlet collecting header (manually operated)4）、后竖井环形集箱疏水阀1-4（单操）21Drain valve 1-4 of rear shafts ring collecting header (manually operated)5）、壁式再热器入口集箱疏水阀1-2（单操）21Drain valve 1-2 of recuperative reheaters inlet collecting header (manually operated)6）、锅炉给水阀21Boiler feedwater valve 7）、锅炉给水阀后电动门（单操）21Rear motor-driven valve of boiler drain valve(manually operated)8）、锅炉给水阀前疏水阀（单操）21Front drain valve of boiler feedwater valve (manually operated)9）、锅炉给水阀前疏水阀（单操）21Front drain valve of boiler feedwater valve (manually operated)10）、锅炉给水旁路调节阀前电动阀（单操）21Front motor-driven valve of boiler bypass feedwater control valve (manually operated)11）、锅炉给水旁路调节阀后电动阀（单操）21Rear motor-driven valve of boiler bypass feedwater control valve (manually operated)12）、省煤器再循环电动阀A/B（手动）21（先开B阀，后开A阀；先关A阀，后关B阀）21Recirculation motor-driven valve A/B of economizer (manually operated)(B open first, and then open A; A close first, and then close B)13）、过热器减温总电动门21Main desuperheating motor-driven valve of superheater14）、再热器减温总电动门21Main desuperheating motor-driven valve of reheater15）、A侧再热器减温水阀22A side desuperheating water valve of reheater16）、B侧再热器减温水阀22B side desuperheating water valve of reheater17）、再热器事故减温水阀22Emergency desuperheating water valve of reheater18）、一级过热汽减温水阀22desuperheating water valve of primary superheater19）、A侧二级过热汽减温水阀23A side secondary desuperheating water valve of superheater20）、B侧二级过热汽减温水阀23B side secondary desuperheating water valve of superheater21）、A侧三级过热汽减温水阀23A side third desuperheating water valve of superheater22）、B侧三级过热汽减温水阀23B side third desuperheating water valve of superheater23）、过热蒸汽PCV阀24Superheated steam PCV valve24）、过热器启动排汽阀1/2（手动）24（先开2阀，后开1阀；先关1阀，后关2阀）24Exhaust valve 1/2 for superheater start (manually operated)(2 open first, and then open 1; 1 close first, and then close2)25）、再热器启动排汽阀1/2（手动）24（先开2阀，后开1阀；先关1阀，后关2阀）24Exhaust valve 1/2 for reheater start (manually operated)(2 open first, and then open 1; 1 close first, and then close2)26）、汽包事故放水阀1/2（手动）24（先开2阀，后开1阀；先关1阀，后关2阀）24Emergency drain valve 1/2 of boiler drum (manually operated)(2 open first, and then open 1; 1 close first, and then close2)27）、汽包连排阀（单操）24Continuous blowdown valve of boiler drum (manually operated)28）、炉前墙定排总电动阀24Main periodic blowdown motor-operated valve of front wall28）、炉前墙定排总电动阀25Main periodic blowdown motor-operated valve of front wall29）、炉前墙定排电动阀1（2、3、4、5、6逻辑同1的）25No.1 periodic blowdown motor-operated valve of front wall (2/3/4/5/6 same as 1)30）、炉A侧定排总电动阀25Main periodic blowdown motor-operated valve of a side wall31）、炉A侧定排电动阀1（2、3、4、5、6逻辑同1的）25No.1 periodic blowdown motor-operated valve of a side wall (2/3/4/5/6 same as 1)32）、炉后墙定排总电动阀26Main periodic blowdown motor-operated valve of rear wall33）、炉后墙定排电动阀1（2、3、4、5、6逻辑同1的）26No.1 periodic blowdown motor-operated valve of rear wall (2/3/4/5/6 same as 1)34）、炉B侧定排总电动阀26Main periodic blowdown motor-operated valve of b side wall35）、炉B侧定排电动阀1（2、3、4、5、6逻辑同1的）26No.1 periodic blowdown motor-operated valve of b side wall (2/3/4/5/6 same as 1)36）、炉B侧定排电动阀1（2、3、4、5、6逻辑同1的）27No.1 periodic blowdown motor-operated valve of b side wall (2/3/4/5/6 same as 1)37）、炉定排关顺控27 Periodic blowdown motor-operated valves sequence close control一、概述300MW机组顺序控制系统包括锅炉烟风系统、锅炉疏水放气系统、汽水系统系统控制及相关辅机设备的控制和顺序启停。The sequence control systems for Rebang 2x300MW units include: Boiler flue-gas system, Boiler drain/exhaust system, Steam Water system and relevant auxilarily devices 顺控部分功能：包含设备级的操作；保护及联锁功能，操作人员通过CRT可对所有的设备进行单个手操作、实现单台设备的启、停（开、关），在出现故障情况时，自动启/停（开/关）设备；联锁是指几个设备之间的联动。Sequence functions include: device level control, protection and interlock functions, CRT single device operated by operator,to control single device “ start/stop” (open/close), any fault occurs, automatic start/stop (open/close) relevant devices, interlock function means relevant device interlock actions.无特别说明的操作，则由操作员根据具体情况进行手动操作。If no special requirement, operator will do manually operate per the real status.允许条件为所有条件相与，联锁条件为所有条件相或。顺控的每一步指令发出后，只有当前一步反馈信号在一定的时间内到达后，才会发出第二步的指令。否则，顺控失败。For permission, should all conditions be met that means it is “and” function. For interlock, any condition exist, will issue interlock function that means it is “or” function. 二、设计说明 Design description1、锅炉部分Boiler partsSCS设计顺控18套SCS design of sequence controls are total 18 sets、锅炉烟风系统Boiler air-flue system锅炉烟风系统控制逻辑包括空预器、引风机、送风机、一次风机及其相关设备的启停；同时设计有可实现单侧空预器、引风机、送风机的顺序启动，也可用功能组顺控逐个进行顺控启停。Boiler air-flue system control logic including: air preheaters, induce draft fans, primilary air fans and related equipments start and stop；At the same time, the design can be achieved one side air preheater, induced draft fan and forced draft fan of sequence started, also functional groups can also be used to one by one start/stop controlled.111、顺控逻辑如下：sequence control logics are as follows1）、空预器A组顺控投用逻辑如下：（A/B侧相同）A air preheater group sequence control “on” logics are as follows: (side B logics are the same as side A)顺控步序：the sequences:第一步：启动A空预器A、B润滑油泵The first step : start A, B oil lube pumps of A air preheater第二步：置空预器A主电机选择为远方The second step: set main motor of A air preheater on remote mode第三步：启空预器A辅助马达，The third step: start auxiliary motor of A air preheater第四步：开空预器A一次风出口档板和二次风出口档板The fourth step: open promiary air outlet dampers and second air outlet dampers of A air preheater 第五步：开空预器A烟气入口阀The fifth step: open inlet flue damper of A air preheater第六步：开空预器A主马达（待主马达启动后自停辅助马达）The sixth step: start main motor of A air preheater (after the main motor started, stop the auxilarily motor)2）、空预器A组顺控停用逻辑如下：（A/B侧相同）A air Preheater group sequence control “off” logics are as follows: (B side sequences and logics are same as the A side)顺控停允许条件：sequential “off” permissive conditions:（1）引风机A已停(1) A IDF has stopped（2）送风机A已停(2) A FDF has stopped（3）一次风机A已停(3) A PAF has stopped顺控步序：the sequences:第一步：关空预器A烟气入口阀The first step: close inlet flue gas dampers of A air preheater第二步：关空预器A一、二次风出口档板The second step: close primilary air and second air outlet dampers of A air preheater. 第三步：停空预器A主马达The third step: stop main moter of A air preheater3）、引风机 A组顺控投用逻辑如下：（A/B侧相同）A IDF group sequence control “on” logics are as follows: (B side sequences and logics are the same of A side)顺控步序：the sequences:第一步：启动选中的#1、#2冷却风机The first step: start selected # 1, # 2 cooling fans第二步：关电除尘A出口烟气挡板；The second step: close outlet flue-gas dampers of A electrostatic precipitator. 开引风机A出口挡板； open outlet dampers of A IDF 置引风机A导叶为0%set vane position of A IDF at 0%第三步：启动引风机AThe third step: start A IDF第四步：延时15S开电除尘A出口烟气挡板The fourth step: open flue-gas outlet dampers of A electrostatic precipitator 3）、引风机 A组顺控停用逻辑如下：（A/B侧相同）A IDF group sequence control “on”logics are as follows: (B side sequences and logics are the same as “A” side)顺控步序：the sequences:第一步：置引风机A导叶为0% The first step: set vane position of “A” IDF at 0%第二步：停引风机AThe second step: stop “A” IDF 第三步：关电除尘A出口烟气挡板、引风机A出口烟气挡板The third step: close flue-gas outlet dampers of both “A” electrostatic precipitator and “A” IDF4）、送风机 A组顺控投用逻辑如下：（A/B侧相同）“A” FDF group sequence control “on” logics (A / B side of the same)顺控步序：the sequences:第一步：启动送风机A油站油泵The first step: start oil station oil pumps of “A” FDF第二步：关送风机A出口挡板；The second step: close outlet dampers of “A” FDF 置送风机A导叶为0%set blade position of “A” FDF at 0%第三步：启动送风机AThe third step: start “A” FDF第四步：延时15S开送风机A出口挡板The fourth step: open outlet dampers of “A” FDF5）、送风机 A组顺控停用逻辑如下：（A/B侧相同）“A” FDF group sequence control “off” logics are as follows: (A / B side of the same)顺控步序：the sequences:第一步：置送风机A导叶为0% The first step: set inlet blade position of “A” FDF at 0%第二步：停送风机AThe second step: stop “A” FDF第三步：开关送A出口挡板The third step: close outlet dampers of “A” FDF6）、一次风机 A组顺控投用逻辑如下：（A/B侧相同）“A” PAF group sequence control “on” logics are as follows: (A / B side of the same)顺控步序：the sequences:第一步：启动一次风机A油站The first step: start oil station of “A” PAF第二步：开A空预器出口一次风挡板；The second step: open outlet primiary air dampers of “A” PAF第三步：关一次风机A出口挡板；The third step: close outlet dampers of “A” PAF 置一次风机A导叶为0%set “A” PAF blade position at 0%第四步：启动一次风机AThe fourth step: start “A” PAF第五步：延时15S开一次风机A出口挡板The fifth step: open outlet dampers of “A” PAF7）、一次风机 A组顺控停用逻辑如下：（A/B侧相同）“A” PAF group sequence control “off” logics are as follows: (A / B side of the same)顺控步序：the sequences:第一步：置一次风机A导叶为0% The first step: set blade position of “A” PAF at 0%第二步：停一次风机AThe second step: stop “A” PAF 第三步：关一次风机A出口挡板The third step: close outlet dampers of “A” PAF112、设备级逻辑：（A、B侧逻辑一样）device-level logics: (A, B side of the logic of the same)1）、送风机A “A” FDF: 启动条件：（要满足以下全部条件）start conditions: (to meet all of the following conditions)（1）A引风机运行并进出口阀开，或B引风机运行并进出口阀开且除尘器出口联络档板已开；(1) “A” IDF running and its inlet & outlet dampers are all opening, or “B” IDF running and its inlet & outlet dampers are all opening and outlet connection damper of precipitator opened;（2）无送风机A的联锁停信号(2) no any interlock stop signals for “A” FDF（3）送风机A停止(3) “A” FDF stopped（4）送风机A出口档板已关(4) outlet dampers of “A” FDF cloesed（5）送风机A入口导叶全关位(5) inlet blade position of “A” FDF at full closed（6）送风机B运行或送风机B入口导叶未全关，且送风机B出口档板已开(6) “B” FDF running or the inlet blade position of “B” FDF is not full closed and outlet dampers of “B” FDF opened.（7）空预器A二次风出口档板已开，或空预器B二次风出口档板已开且送风机联络门已开(7) secondary air outlet dampers of “A” Air Preheater opened, or secondary air outlet dampers of “B” air preheater opened & connection damper of FDFs opened（8）送风机润滑油站正常（无油站温度低和高、无油站滤网压差大、无油站油压低、无油站油位低）(8) lube oil station is on normal status (no oil temperature low or high signal, no filter diffential pressure high signal, and no oil pressure low signal and oil level low signal)（9）无送风机A轴承温度高(9) no “A” FDF bearing temperature high signal（10）无送风机A电机轴承温度高(10) no “A” FDF motor bearing temperature high signal（11）无送风机A电机线圈温度高(11) no “A” FDF motor coil temperature high signal（12）A送风机在远控方式(12) “A” FDF in “remote” control manner（13）无送风机A电气故障条件(13) no “A” FDF electrical default signal启动要求：start permissive conditions:（1） 送风机A组顺控投用； (1) “A” FDF group sequence control “on” ;停要求：stop permissive conditions:（1） 送风机A组顺控停用；(1) “A” FDF group sequence control “off”;跳闸条件：trip conditions:（1）空预器A已停，且送风机A运行；(1) “A” air preheater stopped & “A” FDF running;（2）引风机A已停，且送风机A运行；(2) “A” IDF stopped & “A” FDF running;（3）任一送风机轴承振动大 (驱动端,X、Y方向或非驱动端,X、Y方向)，延时10秒后；(3) any bearing vibration of FDFs is HH , 10 seconds delay;（4）送风机任一电机轴承温度过高；(4) any motor bearing temperature of FDFs is HH ;（5）送风机任一电机线圈温度过高；(5) any motor coil temperature of FDFs is HH;（6）送风机任一轴承温度过高；(6) any bearing temperature of FDFs is HH;（7）动叶10%且送风机A失速延时10S；(7) “A” FDF on stalling;（8）送风机A已运行60秒，且出口档板关；(8) “A” FDF has running for 60 seconds, and outlet dampers are closed;（9）炉膛负压高二值延时5S跳送风机A (来自FSSS吹扫后炉膛负压高或低)；(9) trip “A” FDF signal (from FSSS);（10）送风机A油站供油不正常（延时10S）(10) oil station oil supply for “A” FDF abnormal;2）、送风机A出口风门outlet dampers of “A” FDF:联锁开：interlock open:（1）A送风机已运行延时30秒；(1) “A” FDF is running , after 30 seconds delay;（2）A、B送风机均停延时60秒；(2) both “A”, “B” FDFs are stopped ,then 60 seconds delay;（3）送风机A组顺控投用(3) “A” FDF group on sequence control “on” ;关闭条件：close permission:（1） A送风机已停；(1) “A” FDF is stopped;联锁关：interlock close:（1）送风机A已停，且送风机B运行其出口档板未全关；(1) “A” FDF is stopped & “B” FDF is ruuning and its outlet dampers are not closed;（2）送风机A组顺控停用(2) “A” FDF group sequence control “off ”;（3）送风机A组顺控投用(3) “A” FDF group sequence control “on”;3）、送风机A油站加热器heater of lube oil station for “A” FDF:允许启动条件：start permission :（1）送风机A油泵1运行或油泵2运行(1) 1# or 2# oil pump of “A” FDF is running;（2）油箱油位不低(2) level of oil tank is not low;（3）送风机A加热器无禁操(3) no operational inhibit signal for heater of “A” FDF;联锁启条件：（在联锁按钮投入时）interlock start permissiont (interlock pushbutton on use)（1）油站油箱温度低；(1) Temperature of oil tank is Low;（2）油泵1运行，或油泵2运行；(2) 1# or 2# oil pump of “A” FDF is running;联锁停：（在联锁按钮投入时）interlock stop permission (interlock pushbutton on use)（1）油站温度高；(1) temperature of oil tank is HH;（2）油箱油位低；4）、送风机A油泵1 1# oil pump of “A” FDF:启动条件：start permission :（1） 油箱油位不低；(2) level of oil tank is not low;（2） 液压油站处于远方控制(2) oil station is in “remote” control;（3） 无禁操(3) no operational inhibit signal;联锁启：interlock start :（1）送A油泵联锁已投，且送风机A运行，且送风机A油站油压低；(1) interlock function of oil pump is “on” and “A” FDF is running and oil station oil pressure is low;（2）送A油泵联锁已投，且送风机A运行，且送风机A油泵2已故障；(2) interlock function of oil pump is “on” and “A” FDF is running and 2# oil pump is fault;（3）选择按钮被选中A，送风机A组顺控投用来指令(3) selected “A” pump by bushbutton and with the command of sequence start from “A” FDF group;停止条件：stop permission :（1）送风机A已停；(1) “A” FDF stopped;（2）送风机A油泵2已运行(2) 2# oil pump of “A” FDF is running;5）、送风机A油泵2 2# oil pump of “A” FDF:启动条件：start permission :（1） 油箱油位不低；(1) level of oil tank is not low;（2） 液压油站处于远方控制(2) oil station is in “remote” control;（3） 无禁操(3) no operational inhibit signal;联锁启：interlock start :（1）送A油泵联锁已投，且送风机A运行，且送风机A油站油压低；(1) interlock function of oil pump is “on” and “A” FDF is running and oil station oil pressure is low;（2）送A油泵联锁已投，且送风机A运行，且送风机A油泵1已故障；(2) interlock function of oil pump is “on” and “A” FDF is running and 1# oil pump of “A” FDF is fault;（3）选择按钮被选中A，送风机A组顺控投用来指令(3) selected “A” pump by bushbutton and with the command of sequence start from “A” FDF group;停止条件：stop permission :（1）送风机A已停；(1) “A” FDF stopped;（2）送风机A油泵1已运行(2) 1# oil pump of “A” FDF is running;6）、送风机出口联络风门outlet connection dampers of FDFs:开联锁：interlock open:（1） 送风机A，B均停延时开；(1) both “A” &”B” FDFs stopped, delay to open;关联锁：interlock close:（1）送风机B运行，且空预器A停；(1) “B” FDF is running and “A” air preheater stopped;（2）送风机A运行，且空预器B停；(2) “A” FDF is running and “B” air preheater stopped;（3）送风机A已停65秒，且其出口档板和进口导叶均未关，且送风机B在运行；(3) “A” FDF has stopped for 65 seconds, and its outlet damper and inlet blade are all not closed, and “B” FDF is still running;（4）送风机B已停65秒，且其出口档板和进口导叶均未关，且送风机A在运行；(3) “B” FDF has stopped for 65 seconds, and its outlet damper and inlet blade are all not closed, and “A” FDF is still running;7）、引风机A “A” IDF启动条件：start permission :（1）冷却风机A运行，或冷却风机B运行；(1) cooling fan “A” or “B” is running；（2）无引风机A联锁停(2) no any interlock stop signal of “A” IDF；（3）引风机A静叶已关，且出口挡板开，且入口挡板关，且引风机A已停；(3) “A” IDF vane closed, and its outlet damper opened , and inlet damper closed,and “A” IDF stopped；（4）空预器A运行，且空预器A烟气入口档板已开(4) “A” air preheater is running ,and its inlet flue-gas damper opened；（5）无轴承温度高、(5) no bearing temperature high signal；（6）无电机轴承温度高、(6) no motor bearing temperature high signal；（7）无电机线圈温度高、(7) no motor coil temperature high signal；（8）无禁操；(8) no operational inhibit signal；（9）另一侧空气通道已打开：(9) other side of air path opened:（9.1）空预器B运行，或空预器B烟气进口档板已开；() “B” air preheater is running ,or its inlet flue-gas damper opened；（9.2）引风机B调节导叶未关，且出口挡板已开，且电除尘B出口挡板已开，且所有辅助风档板在吹扫位；() vane of “B” IDF is not closed, and its outlet damper opened,and outlet damper of “B” precipitator opened, and all auxiliary air dampers are at purge position；（9.3）送风机B出口联络门已开或空预器B二次风出口档板已开，且送风机B出口档板已开，且送风机B入口导叶在全开位() outlet connection damper of “B” FDF opened or secondary air damper of “B” air preheater opened, and outlet damper of “B” FDF opened, and its inlet blade at full opened position；（10）无禁操：（11）无电气故障：（12）在远控方式联锁停：interlock to stop :（1）空预器A已停（延时？）；(1) “A” air preheater stoped；（2）引风机A冷却风机均停，且引风机A在运行延时； (2) all cooling fans of “A” IDF stopped, and “A” IDF is running；（3）任一轴承温度过高；(3) bearing temperature is HH；（4）任一电机轴承温度过高；(4) motor bearing temperature is HH；（5）任一电机线圈温度过高； (5) motor coil temperature is HH；（6）轴向振动大延时10秒；(6) axial vibration is HH, and 10 seconds delay；（7）引风机A已运行60秒，且出口档板或入口挡板在关位；(7) 60 seconds after “A” IDF is running , its outlet or inlet dampers are closed；（8）炉膛负压低二值延时5S跳引风机A (来自FSSS吹扫后炉膛负压高或低)；(8) trip “A” IDF (from FSSS);（9）引风机全在运行时，送风机A未运行延时1秒脉冲 (9) all IDFs are running, but “A” FDF stopped, 1 seconnds delay;（10）送风机A、B 都未运行；(10) both “A”&”B” FDFs are not running（11）静叶15%且引风机A失速延时10秒。(11) “A” IDF is stalling, 10 seconds delay;（12）无禁操、无电气故障、在遥控方式(12) no operational inhibit, no electrical fault, in remote control;开要求：start permission :（1） 引风机A组顺控投用；(1) “A” IDF group sequence control “on”;关要求：stop permission :（1）引风机A组顺控停用(1) “A” IDF group sequence control “off”;8）、电除尘器A出口烟气挡板outlet flue-gas damper of “A”precipitator:联锁开：interlock open :（1）引风机A运行延时30秒；(1) “A” IDF is running , delay 30 seconds;（2）引风机A，B均停延时135秒；(2)both “A” & “B” IDFs are stopped, and 135 seconds delay;（3）引风机A组投用顺控来指令 (3) command from “A” IDF group sequence start;允许关条件：close permission :（1） A引风机已停；(1) “A” IDF stopped;联锁关：interlock to close :（1）引风机A停，且引风机B运行；(1) “A” IDF stopped, and “B” IDF is run