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一、前言空气予热器是锅炉中的重要组成构件,其功用乃是利用锅炉排出的烟气的热量来预热供锅炉燃烧的空气。它在预热空气的同时,其低温部位不可避免地要遭受由于锅炉采用高硫燃料而在燃烧过程中生成硫酸的所谓硫酸露点腐蚀。就会使空气预热器堵灰和穿孔,以致带不上负荷而不得不停炉检修更换,这要影响锅炉的有效作业率,也要消耗大量金属。因此,提高空气预热器的使用寿命成了国内外所密切注意和努力解决的问题。目前,国内外提高空气预热器的使用寿命的主要措
I. Preface The air preheater is an important component of the boiler. Its function is to use the heat of the flue gas discharged from the boiler to preheat the air for the combustion of the boiler. While it preheats the air, its low-temperature part inevitably suffers from the so-called sulfuric acid dew point corrosion which generates sulfuric acid in the combustion process by using high-sulfur fuel in the boiler. It will block the air preheater ash and perforation, resulting in no load and had to stop furnace repair replacement, which affects the effective operating rate of the boiler, but also consume a large amount of metal. Therefore, raising the service life of air preheater has become a problem that domestic and foreign countries pay close attention to and work hard to solve. At present, the main measures to increase the service life of air preheaters at home and abroad