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1 前言 我国的水泥工业主要以煤为主燃料,燃煤在烘干、破碎过程中造成的污染是水泥工业的主要污染源之一。回转式煤粉烘干机系统的除尘净化是国内外目前极为重视的课题,特别是机尾烟气净化更是一大难题。机尾烟气含尘浓度高、易燃易爆、湿度大、露点温度高、易结露,采用一般旋风除尘器其除尘效率只能达到60%~80%,甚至更低,对于细微粉尘就更低了;采用袋式除尘器易结露糊袋、烧袋,换袋劳动强度大,运行费用高;采用湿式除尘器不但工艺不允许,而且存在二次污染问题。
1 Introduction China’s cement industry mainly coal as the main fuel, coal in the drying, crushing pollution caused by the process of cement industry is one of the major sources of pollution. Rotary pulverized coal dryer dust removal system is the subject of great attention at home and abroad, especially the tail flue gas purification is a big problem. Machine tail flue gas dust concentration, flammable and explosive, humidity, high dew point temperature, easy to dew, the general cyclone dust removal efficiency can only reach 60% to 80%, or even lower, for fine dust on Lower; bag filter dew condensation paste bag, burning bags, bag labor intensive, high operating costs; the use of wet dust collector not only not allowed, but there are secondary pollution problems.