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对燃烧烟煤的锅炉来说,制粉系统的设计一般采用干燥剂送粉中间贮仓式制粉系统。送风机把冷空气送进空气预热器加热成热空气,一部分作为二次风经燃烧器喷入炉膛,另一部分作为干燥剂送入磨煤机,对原煤进行干燥。同时携带制成的煤粉离开磨煤机进入粗粉分离器,不合格的粗粉被分离出来,经回粉管回到磨煤机重新再磨,合格的煤粉被干燥剂带入细粉分离器,煤粉被分离进入粉仓,干燥剂被排粉机直接排入一次风管,作为一次风携带着给粉机送来的煤粉,通过喷燃器喷入炉膛燃烧。习惯上,我们称这种运行方式为乏气送粉。当磨煤机停止运行时,排粉机从热风管道中吸取热风并
For the combustion of bituminous coal boiler, milling system design generally use desiccant powder to the middle silo system. The blower sends the cold air into the air preheater to heat it into hot air, a part of which is injected into the hearth as a secondary air through the burner and the other part is sent to the coal mill as a desiccant to dry the raw coal. At the same time, the pulverized coal taken from the coal mill is taken out of the coal pulverizer to enter the coarse meal separator. The unqualified coarse meal is separated and returned to the coal mill for re-grinding by the return powder pipe. The qualified pulverized coal is carried into the fine powder by the desiccant Separator, pulverized coal is separated into the silo, the desiccant is discharged directly into the primary exhaust pipe, as a wind carrying the powder sent to the pulverized coal, injected into the combustion chamber through the burner. Traditionally, we call this mode of operation a lack of gas to powder. When the coal mill to stop running, the exhaust machine to take hot air from the hot air duct and