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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。
Abstract：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.
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基本信息:
DOI：10.19929/j.cnki.nmgdljs.2024.0032
中图分类号:
引用信息:
[1]马彪, 刘成, 郭滔等.1000 MW双切圆锅炉高温腐蚀原因分析[J].内蒙古电力技术,2024,42(02):96-100.DOI:10.19929/j.cnki.nmgdljs.2024.0032.
基金信息: