Excessive desuperheating water and high exhaust temperature in a 630MW unit boiler:integrated analysis and solutions

LIU Koulin; TANG Haining; Li Mingwu

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Excessive desuperheating water and high exhaust temperature in a 630MW unit boiler:integrated analysis and solutions

Thermal Power Generation Vol. 42, Issue 10, Pages: 103-106(2013)

更新时间：2025-09-28

- Excessive desuperheating water and high exhaust temperature in a 630MW unit boiler:integrated analysis and solutions
- 作者机构：
  
  江苏国信扬州发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.32
- Published：2013
- 稿件说明：
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LIU Koulin, TANG Haining, Li Mingwu. Excessive desuperheating water and high exhaust temperature in a 630MW unit boiler:integrated analysis and solutions[J]. Thermal Power Generation, 2013, 42(10): 103-106.
DOI：

LIU Koulin, TANG Haining, Li Mingwu. Excessive desuperheating water and high exhaust temperature in a 630MW unit boiler:integrated analysis and solutions[J]. Thermal Power Generation, 2013, 42(10): 103-106. DOI：

摘要

某电厂630MW机组锅炉存在过热器减温水量偏大和排烟温度高于设计值的问题

严重影响机组的经济运行。对此

采取减少低温过热器及低温再热器吸热面积

将原有光管省煤器改为换热系数更高的H型省煤器等方案对锅炉受热面进行了改造。改造后600MW负荷下过热器减温水量下降了100t/h

排烟温度也达到了设计值

提高了锅炉运行的经济性和安全性。

Abstract

Problems like excessive desuperheating water flow and over high exhaust temperature occurred in a 630MW unit boiler

which seriously affected the economic operation of the unit.In order to solve these problems

several countermeasures were taken

like decreasing the heating area of low-temperature superheater and low-temperature reheater

and replacing the economizer with bare tubes for the one with H-type tube which had higher heat transfer coefficient.After the adjustment

the desuperheating water flow dropped by 100t/h

and the exhaust temperature also reached the design value.

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