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一、E 型磨煤机的系统和结构特点1.E 型磨煤机的制粉系统和调节大型 E 型中速磨煤机(出力在20吨/时以上)是我国近年来引进的新型制粉设备,均采用正压直吹系统。制粉用的一次风来自回转式空气预热器出口的热风,一般在300℃左右,它和送风机出口的冷风混合,再经一次风机增压送入磨煤机。原煤由原煤仓经落煤斗进入正压式括板给煤机(由无级变速箱驱动),再经落煤管至磨煤机。经过碾磨的煤粉,在磨内分离器进行分离,细度合格的煤粉送到炉膛四角燃烧器,
I. System and structural features of E-type coal mill 1. The pulverizing system of E-type coal mill and the adjustment of large-sized E-type medium speed coal mill (output above 20 tons / hour) are new type systems introduced in recent years in China Powder equipment, are using positive pressure direct blowing system. The primary air for milling comes from the hot air at the outlet of the rotary air preheater, which is usually around 300 ℃. It is mixed with the cold air at the outlet of the blower and then fed to the coal mill by a blower. Raw coal from the coal bunker through the coal bucket into the positive pressure coal feeder (driven by the CVT), and then through the coal pipe to the coal mill. After grinding the pulverized coal in the mill separator for separation, the fineness of qualified coal sent to the furnace four corner burner,