摘要
某厂锅炉水冷壁发生高温腐蚀现象,通过煤质分析、腐蚀形貌观察和腐蚀产物分析等方法研究了导致腐蚀的原因。结果表明:产生高温腐蚀的主要原因为机组实际燃煤硫分含量较设计偏高,燃烧器设计缺陷导致炉内强还原性气氛和定期的大出力试验使大量煤粉聚集粘结在水冷壁鳍片附近造成的。为此,提出了调整煤粉细度,燃烧器局部改造,燃烧优化调整等建议。
In this paper, the causes of high temperature corrosion of water wall were studied through analysis of coal quality, corrosion morphologies and compositions. Results showed that the main reason for the high temperature corrosion was the higher sulfur amount in the actual coal than that in the design. Besides, the burner design defect led to the formation of the strong reducing atmosphere and a large amount of coal powder caused by the periodic large capacity test was accumulated in the water wall near the water wall fins. Therefore, some solutions were put forward, like adjusting the fineness of the pulverized coal, reconstructing the local modification of burner as well as the optimizing and adjusting of combustion.
作者
罗昌福
杨博闻
田平
祁博武
LUO Chang-fu;YANG Bo-wen;TIAN Ping;QI Bo-wu(Huadian Electric Power Research Institute, Hangzhou 310030, China;School of Metallurgical Engineering, Xi＇ an University of Architecture and Technology, Xi＇ an 710055, China)
出处
《材料保护》
CAS
CSCD
北大核心
2018年第3期107-109,135,共4页
Materials Protection
关键词
水冷壁
高温腐蚀
原因分析
建议
water wails
high temperature corrosion
causes analysis
solutions
