Chemical Industry and Engineering Progress ›› 2020, Vol. 39 ›› Issue (S1): 90-96.DOI: 10.16085/j.issn.1000-6613.2020-0302

• Chemical processes and equipment • Previous Articles     Next Articles

Analysis and countermeasure of high temperature corrosion on water wall of coal-fired power plant boiler

Yingli YU1(), Xuchen FU1, Yingying DAI2, Jun RONG1, Zhengping GAO1, Bin CAI1, Junhu HU3   

  1. 1.Inner Mongolia Electric Power Research Institute, Hohhot 010020, Inner Mongolia, China
    2.Inner Mongolia Vocational College of Chemical Engineering, Hohhot 010010, Inner Mongolia, China
    3.Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China
  • Received:2020-03-02 Online:2020-06-29 Published:2020-05-20
  • Contact: Yingli YU

燃煤电站锅炉水冷壁壁面高温腐蚀问题分析与对策

于英利1(), 付旭晨1, 戴莹莹2, 荣俊1, 高正平1, 蔡斌1, 胡俊虎3   

  1. 1.内蒙古电力科学研究院, 内蒙古 呼和浩特 010020
    2.内蒙古化工职业学院,内蒙古 呼和浩特 010010
    3.内蒙古工业大学,内蒙古 呼和浩特 010051
  • 通讯作者: 于英利
  • 作者简介:于英利(1980—),男,硕士,高级工程师,从事电站锅炉燃烧、节能及洁净技术的工作。E-mail:yingli8088@163.com
  • 基金资助:
    内蒙古电力(集团)有限责任公司重大项目(510141190090K);内蒙古电力科学研究院自主科技项目(510241140009K)

Abstract:

The object of research is the high-temperature corrosion of the water-cooled wall of the utility boiler in the form of hedge combustion. The corrosion characteristics of the water-cooled wall combustion area are modeled and analyzed from the perspective of corrosion mechanism and combustion characteristics. The distribution of sulfide-type molten salt corrosion parts is distributed. The areas where severe corrosion occurs will be concentrated in the area around the burners on both sides of the wall, the area of the lower cold ash hopper, and the middle of the sides of the wall between the upper burner and the top burnout vent region.The verification of field measured data shows that when the oxygen concentration in the near wall of the water-cooled wall of a coal-fired power plant boiler is extremely low, the concentration of H2S, CO and other substances exceeds the requirements of the corrosion judgment index.Combined with engineering experience, specific measures for high temperature corrosion prevention of water-cooled walls are given.

Key words: coal-fired power plant boiler, water wall, high temperature corrosion, analysis, countermeasures

摘要:

以对冲燃烧方式的电站锅炉水冷壁壁面高温腐蚀问题为研究对象,从腐蚀机理与燃烧特性角度对水冷壁燃烧区域进行腐蚀特性建模分析,研究水冷壁近壁区域还原性和腐蚀性气氛作用下的硫化物型熔盐腐蚀部位分布规律,腐蚀发生严重的区域将集中在两侧墙的燃烧器周围区域、下层冷灰斗区域、上层燃烧器与顶层燃尽风喷口之间的两侧墙中间区域。现场实测数据验证可知,燃煤电站锅炉水冷壁近壁区域在氧浓度极低情况下,H2S、CO等物质浓度严重超出腐蚀判定指标要求,水冷壁壁面腐蚀严重,腐蚀发生部位与数值模型结果吻合。结合工程经验,给出了水冷壁壁面高温腐蚀防治的具体措施。

关键词: 燃煤电站锅炉, 水冷壁, 高温腐蚀, 分析, 对策

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd