600 MW机组空气预热器蓄热板失效分析  

Failure Analysis of the Air Preheater Regenerative Plate in a 600 MW Unit

作　　者：陈小强 龚琨 彭月玺 张琳 雷健康 赵伶玲[3] Chen Xiaoqiang;Gong Kun;Peng Yuexi;Zhang Lin;Lei Jiankang;Zhao Lingling(China Power Huachuang Electricity Technology Research Co., Ltd.,Suzhou 215123, Jiangsu Province, China;China Power Shentou Power Generation Co., Ltd., Shuozhou 036800, Shanxi Province, China;School of Energy and Environment, Southeast University, Nanjing 210096, China)

机构地区：[1]中电华创电力技术研究有限公司,江苏苏州215123 [2]中电神头发电有限责任公司,山西朔州036800 [3]东南大学能源与环境学院,南京210096

出　　处：《发电设备》2020年第6期422-426,共5页Power Equipment

摘　　要：针对某电厂600 MW机组空气预热器运行中发生严重的堵灰和腐蚀现象,分析了空气预热器蓄热板失效的原因,并对失效蓄热板进行了试验。结果表明:空气预热器热端蓄热板材质良好,但是磨损和腐蚀严重;中温段和冷端蓄热板材质较差,且存在NH4HSO4积灰和腐蚀现象。To solve the problems of serious ash blocking and corrosion existing in the air preheater of a 600 MW unit,an analysis was conducted on the causes leading to the failure of the air preheater regenerative plate,while experimental tests were carried out.Results show that the material quality of the regenerative plate at hot end of the air preheater is good,where the wear and corrosion are serious;the material quality of the regenerative plate in middle section and at cold end is poor,where serious accumulation and corrosion of ammonium bisulfate ash exist.

关 键 词：火电机组 空气预热器 蓄热板 磨损 积灰 腐蚀 金相分析 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]