华电技术 ›› 2018, Vol. 40 ›› Issue (2): 40-42.

• 技术交流 • 上一篇    下一篇

超临界机组低低温省煤器反冲洗方式应用分析

  

  1. 黄冈大别山发电有限责任公司,湖北麻城〓438304
  • 出版日期:2018-02-25 发布日期:2018-03-28

Application analysis of backwash method for lowlow temperature economizer of supercritical unit

  1. Huanggang Dabie Mountain Power Generation Company Limited, Macheng 438304,China
  • Online:2018-02-25 Published:2018-03-28

摘要:

黄冈大别山发电有限公司 #1机组A修进行了超低排放改造,采用低低温省煤器+低低温静电除尘器方案,在原静电除尘器入口增设低低温省煤器。在实际应用中,低低温省煤器热力系统无论在冷、热态情况下,均受到凝汽器补水的限制而无法实现大流量冲洗。#2机组A修进行超低排放改造时,加装了反冲洗阀,采用反冲洗方式,缩短了冲洗时间,节约了大量除盐水。2017年9月,利用 #1机C修进行低低温省煤器反冲洗改造,改造效果明显。

关键词:

Abstract:

A lowlow temperature economizer was installed in the #1 unit of Huanggang Dabie Mountain Power Generation Company Limited during its ultralow emission modification which was carried out during A class maintenance. In the practical application, the thermal system of the lowlow temperature economizer is restricted by the condenser water flow in both cold and hot condition, and cannot get highflow flushing. During ultralow emission modification in the A class maintenance of #2 unit,a backflush door was installed. Backflushing method is adopted to shorten the washing time and save a lot of desalination water. Therefore, it is a good chance to carry out backwashing modification on lowlow temperature economizer during C class maintenance on #1 unit, which will achieve good results.

Key words: