1000 MW双切圆锅炉高温腐蚀原因分析  

Analysis of High Temperature Corrosion Causes in 1000 MW Double Tangential Boiler

作　　者：马彪 刘成 郭滔 杨国辉 马宁 MA Biao;LIU Cheng;GUO Tao;YANG Guohui;MA Ning(China Energy Science and Technology Research Institute Co.,Ltd.,Yinchuan 710004,China;CHN Energy Zhejiang Province Energy Ningdong Power Generation Co.,Ltd,Yinchuan 750408,China;CHN Energy Ningxia Power Co.,Ltd.,Yinchuan 750004,China;CHN Energy Ningdong First Power Generation Co.,Ltd,Yinchuan 750048,China)

机构地区：[1]国家能源集团科学技术研究院有限公司,银川710004 [2]国能浙能宁东发电有限公司,银川750408 [3]国能宁夏电力公司,银川750004 [4]国能宁东第一发电有限公司,银川750048

出　　处：《内蒙古电力技术》2024年第2期96-100,共5页Inner Mongolia Electric Power

摘　　要：针对某1000 MW双切圆锅炉局部水冷壁发生严重高温腐蚀问题,通过冷态空气动力场试验进行风量测量及风门挡板特性测试,并结合水冷壁近壁区还原性气体浓度测试验证,确定原因为:在较大的DCS数据偏差误导下,使得运行时挡板开度不合理,导致局部区域缺氧燃烧严重,造成该区域发生严重的高温腐蚀。调整运行方式后,较大程度上缓解了该区域缺氧燃烧的情况,发生水冷壁高温腐蚀的可能性大幅降低。In response to the severe high⁃temperature corrosion problem of the local water⁃cooled wall of a 1000 MW double tangential boiler,air flow measurement and damper baffle characteristic testing are conducted through cold aerodynamic field tests,and combined with the verification of reducing gas concentration testing in the near wall area of the water⁃cooled wall,it is determined that the reasons are:under the misleading of large DCS data deviation,the baffle opening is unreasonable during operation,leading to severe oxygen⁃deficient combustion in the local area,resulting in severe high⁃temperature corrosion in that area.After adjusting the operating mode,the situation of oxygen⁃deficient combustion in the area is greatly alleviated,and the possibility of high⁃temperature corrosion of the water⁃cooled wall is greatly reduced.

关 键 词：双切圆锅炉 高温腐蚀 还原性气体 缺氧燃烧 

分 类 号：TM621.2[电气工程—电力系统及自动化]