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.
作者
陈小强
龚琨
彭月玺
张琳
雷健康
赵伶玲
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)
出处
《发电设备》
2020年第6期422-426,共5页
Power Equipment
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
thermal power unit
air preheater
regenerative plate
wear
ash deposition
corrosion
metallographic analysis
