我厂锅炉采用的是管式空气预热器,管子外径40mm,壁厚1.5mm,焊在两端开孔的管板上,用框架固定。该预热器优点是结构紧凑,传热效率高。缺点是管内易结灰堵塞,常需停炉清灰,给企业带来损失。由于安装位置的限制,管子不易更新,加上管子细长,清灰难度很大。 为解决预热器结灰堵塞问题,我们从烟气流动形态分析了结灰的原因。由于引风机电流基本稳定,可以推断,经过空气预 I plant boiler tube air preheater is used, the pipe diameter 40mm, wall thickness 1.5mm, welded tube plate perforated at both ends, with a frame fixed. The preheater has the advantages of compact structure and high heat transfer efficiency. The disadvantage is that the tube easy to knot ash clogging, often need to shut down furnace cleaning, to bring business losses. Due to the installation of the location of the tube is not easy to update, coupled with slender tube, cleaning is very difficult. In order to solve the problem of clogging of the preheater with lime, we analyzed the reason of dusting from the flue gas flow pattern. As the induced draft fan current is basically stable, we can infer that after the air pre-