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结合对75t煤气锅炉低温段空气预热器的改造实例,阐述了煤气锅炉低温段空气预热器因锅炉负荷变化、掺烧焦炉煤气增大等因素而引起的低温段空气预热器低温腐蚀现象,分析了低温段空气预热器腐蚀损坏的原因并提出了相应的预防改进措施。
Combining with the remodeling of low temperature air preheater of 75t gas boiler, this paper expounds the low temperature corrosion of low temperature air preheater caused by the change of boiler load and the increase of coke oven gas. Phenomenon, analyzed the reason of corrosion damage of air preheater in low temperature section and put forward the corresponding measures of prevention and improvement.