["["锅炉给水备用泵自启",

2017-08-12View Original

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["当运行泵出现故障时，如何在DCS实现备用泵的自启？ �谢啦！自控仪表"

Reply #22017-08-12

"设置流量连锁，低于流量一定值时启动备用泵！"

Reply #32017-08-12

"能说下DCS软件要求吗"

Reply #42017-08-12

"锅炉给水泵一般为离心泵，所以不宜设置流量低低自启，应设置为压力低低自启动"

Reply #52017-08-13

"能具体说下离心泵为什么不宜设置流量低自启吗？如果设置流量低自启的话有什么影响？"

Reply #62017-08-14

"一般是压力低于设定值启用备用泵，而流量往往用来做3冲量调节去了。"

Reply #72017-08-21

"给水泵是根据液位控制，我们还是手动切换，不科学，有时间改改。"

Reply #82017-08-23

"锅炉给水备用泵启动设置为两种：更据给水母管压力，当压力低于某一值时候，启动备用泵，流量只用于监测。更据运行泵的运行状态，当运行泵的运行状态消失即为投时候，启用备用泵。以上双联锁保护保证给水泵满足工艺正常运行"

Reply #92017-08-23

"可以具体说说软件要求吗？怎么设计去实现这个联锁功能呢？"

Reply #102017-08-24

"你提出要求，专门负责组态的工程师会指导DCS怎么操作。现场需要给DCS提供给水母管压力AI、A泵的运行状态DI、B pump的运行状态DI就可以。在DCS中增加判断逻辑来进行备用泵的联锁。设置两种联锁模式：当A pump运行联动B pump时时的的联锁投切开关运行然后进行逻辑组态；当B pump运行联动A pump时时的的联锁投切运行然后进行逻辑组态。"

Reply #112017-08-28

"压力更能直接反映停泵出现的工艺状况，这意意也就有了"

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