High exhaust temperature of a 300 MW unit boiler:reason analysis and countermeasures

Gao Jilu1; Zou Tianshu1; Li Zhilong2; Ning Xianwu2; Ai Zhongyan2 1.Northeast Electric Power Research Institute Co.

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High exhaust temperature of a 300 MW unit boiler:reason analysis and countermeasures

Thermal Power Generation Vol. 42, Issue 2, Pages: 110-113(2013)

更新时间：2025-09-28

- High exhaust temperature of a 300 MW unit boiler:reason analysis and countermeasures
- 作者机构：
  
  1. 东北电力科学研究院有限公司
  2. 国华绥中发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2013
- 稿件说明：
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Gao Jilu1, Zou Tianshu1, Li Zhilong2, et al. High exhaust temperature of a 300 MW unit boiler:reason analysis and countermeasures[J]. Thermal Power Generation, 2013, 42(2): 110-113.
DOI：

Gao Jilu1, Zou Tianshu1, Li Zhilong2, et al. High exhaust temperature of a 300 MW unit boiler:reason analysis and countermeasures[J]. Thermal Power Generation, 2013, 42(2): 110-113. DOI：

摘要

对某电厂300MW机组锅炉排烟温度异常偏高的原因进行了分析

认为其主要因燃气脉冲吹灰器吹灰效果不佳导致尾部受热面积灰严重

使水平低温过热器和省煤器吸热量减少所致。通过采取减小干渣机漏风、调整燃烧器摆角以及将燃气脉冲吹灰器改造为蒸汽吹灰器等措施

使排烟温度下降了16℃

锅炉效率提高了0.94百分点

供电煤耗约降低3.29g/(kW.h)

提高了机组运行的安全性和经济性。

Abstract

The exhaust temperature of a 300 MW unit boiler was higher than the designed value.To enhance the security and economy of the unit operation

reason analysis was conducted.Decrease in heat absorption of horizontal low-temperature reheater and economizer was considered as the major factor

which resulted from serious ash deposition on final heating surfacing caused by poor soot blowing effect of the flue gas impulse soot blower.Thus

several measures were carried out

such as reducing the air leakage in dry residue machine

adjusting the burner injection angle

and transforming the flue gas impulse soot blower into steam soot blower.After improvement

the exhaust temperature dropped by 16 ℃

the boiler efficiency increased by 0.94%

and the coal consumption decreased by about 3.29 g/(kW·h).The safety and economy of the unit was significantly enhanced.

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