华电技术 ›› 2018, Vol. 40 ›› Issue (4): 52-53.

• 技术交流 • 上一篇    下一篇

660MW机组启动中凝结水系统故障及处理

  

  1. 湖南华电常德发电有限公司,湖南常德〓415000
  • 出版日期:2018-04-25 发布日期:2018-06-21

Fault and treatment of condensate system during startup of 660MW unit

  1. Hunan Huadian Changde Power Generation Company Limited, Changde 415000, China
  • Online:2018-04-25 Published:2018-06-21

摘要:

某发电公司机组大修后初次启动时,因锅炉受热面管道焊接使用的水溶纸残留物随旁路系统进入凝汽器,导致凝结水泵出口滤网相继堵塞,被迫停炉。清理后,短时间内滤网再次堵塞,影响启动进程。采用凝结水系统与给水系统分离的运行方式对凝结水系统进行循环冲洗,机组恢复正常运行,最后总结了机组大修后启动过程中应注意的问题。

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Abstract:

During the first start of a power generation company’s unit after its overhaul, the aqua soluble paper residue used in the pipe welding on the boiler heating surface entered the condenser from the bypass system. It caused clog of condensate pumps’s outlet filters successively,which forced the boiler to stop. The filters were blocked again right after cleaning, which affected the startup process. A method in which condensate system was separated from the water supply system was used in circulating washing the condensate system. The unit returned to normal operation. Finally the problems that should be noticed during the units’ overhaul are summarized.

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