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阐述了水环真空泵组的工作原理和工作流程,并就内蒙古蒙华海勃湾发电厂在定期切换水环真空泵时,由于入口电动门的差压连动开关误动导致凝汽器真空下降造成的停机事故进行了认真研究分析,发现事故原因是由于水环真空泵组的系统设计存在问题造成的。通过实施技术改造,在水环真空泵入口管路上加装止回阀,并进行了长期试验,彻底解决了凝汽器真空泵正常运行及切换过程由于故障所引起的降真空停机事故。
The working principle and work flow of water ring vacuum pump are expounded. And when Inner Mongolia MengHua Haibowan Power Plant switches water ring vacuum pump periodically, due to the malfunction of differential pressure interlock switch of inlet electric door, the vacuum of condenser is caused Downtime accident conducted a careful study and analysis, found that the cause of the accident is due to water ring vacuum pump system design problems caused. Through the implementation of technological innovation, installation of check valve on the water ring vacuum pump inlet pipe and long-term test, completely solve the condenser vacuum pump normal operation and switching process due to the failure caused by the vacuum downtime accident.