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1前言锅炉的空气预热器是利用省煤器排出的高温烟气加热燃烧用空气的传热设备，预热后的空气有利于燃料的快速着火和充分燃烧，并可降低排烟温度提高锅炉热效率。因此，空气预热器是锅炉构成中一个十分重要的部分。2空气预热器堵塞的危害目前在用的锅炉中，大部分采用的是钢管?
1 Introduction Boiler air preheater is the use of economizer exhaust high-temperature flue gas heating combustion air heat transfer equipment, preheated air is conducive to rapid fuel combustion and full combustion, and can reduce the exhaust gas temperature to improve the boiler Thermal efficiency. Therefore, the air preheater constitutes a very important part of the boiler. 2 the hazards of air preheater blockage Currently used in the boiler, most of the use of steel?