Cause analysis and treatment of boiler water abnormity in a 300MW unit

LIU Wei; MA Zhijing; JIA Rong

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Cause analysis and treatment of boiler water abnormity in a 300MW unit

更新时间：2025-09-28

- Cause analysis and treatment of boiler water abnormity in a 300MW unit
- Thermal Power Generation Vol. 43, Issue 5, Pages: 139-141(2014)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 神华神东电力有限责任公司新疆米东热电厂
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2014
- 稿件说明：
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LIU Wei, MA Zhijing, JIA Rong. Cause analysis and treatment of boiler water abnormity in a 300MW unit[J]. Thermal power generation, 2014, 43(5): 139-141.
DOI：

LIU Wei, MA Zhijing, JIA Rong. Cause analysis and treatment of boiler water abnormity in a 300MW unit[J]. Thermal power generation, 2014, 43(5): 139-141. DOI：

摘要

新疆米东热电厂1号机组锅炉炉水电导率和pH值较高

超出正常范围

对水冷壁管存在腐蚀的风险。检测发现炉水中出现了大量游离NaOH

分析发现其由作为给水补水的热网疏水受热网循环水的污染所致。由于连续排污扩容器的分离蒸汽至除氧器的逆止阀存在缺陷

造成锅炉未真正有效排污

炉水长期处于过度浓缩状态

最终产生大量游离NaOH

对锅炉加强排污后

炉水水质恢复正常。

Abstract

The conductivity and pH value of boiler water in No.1unit of Midong Thermal Power Plant were over standard.So the water wall tubes suffered the risk of alkaline corrosion and boiler water concentrate corrosion.Detection finds a larger number of free sodium hydroxide appears in the boiler water.This is because the heat-supply network drain which is used as the feed water supplement water was polluted by leakage of circulating water of district heating system heater. The check valve between the steam separated from continuous blow-down flash vessel and the deaerator had some defects

leading to invalid blow down

so the boiler water were over concentrated

a larger number of free sodium hydroxide appeared in the boiler water

resulting in boiler water abnormality eventually.Finally

after improving continuous blow down

the boiler water turned back to normal.

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