High temperature corrosion in wall-firing boiler:reason analysis and treatment

LIU Honggang; ZHANG Guangcai; WANG Zhigang; LIAO Xiaochun; CHEN Minsheng; CHEN Yiyang

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High temperature corrosion in wall-firing boiler:reason analysis and treatment

更新时间：2025-09-28

- High temperature corrosion in wall-firing boiler:reason analysis and treatment
- Thermal Power Generation Vol. 42, Issue 12, Pages: 129-131(2013)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 广东粤电靖海发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK228
- Published：2013
- 稿件说明：
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LIU Honggang, ZHANG Guangcai, WANG Zhigang, et al. High temperature corrosion in wall-firing boiler:reason analysis and treatment[J]. Thermal power generation, 2013, 42(12): 129-131.
DOI：

LIU Honggang, ZHANG Guangcai, WANG Zhigang, et al. High temperature corrosion in wall-firing boiler:reason analysis and treatment[J]. Thermal power generation, 2013, 42(12): 129-131. DOI：

摘要

某机组锅炉水冷壁存在高温腐蚀问题

通过试验研究与分析认为

其主要因煤粉刷墙、两侧墙附近呈强还原性气氛以及存在高浓度H2S所致。对此

通过设备改造和专项治理后

两侧墙壁面气氛良好

高温腐蚀发生的条件消除

屏式过热器与高温再热器受热面不再超温

排烟中CO浓度在100μL/L以下

设备改造前后相同试验条件下SCR入口NOx变化在20mg/m3以内。

Abstract

High temperature corrosion occurred on two sides of water wall in a boiler.Experiment showes the pulverized coal scour on water wall tube

strong reductive atmosphere near side walls and high density of H2 S are the major reasons.Thus

regulations on relative equipments were conducted.After the improvement

the atmosphere at two sides of the water wall turned well

meaning the condition that may lead to high temperature corrosion was eliminated.The temperature at platen superheater and high temperature reheater surface was no longer over high.The CO concentration in flue gas dropped below 100μL/L

and the variation of NOx concentration at inlet of the SCR was within 20mg/m3 under the same experimental conditions before and after the equipment modification.

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