The utility model relates to a coal mill which prevents the blockage of the inlet air duct. The pulverizer which prevents the blockage of the inlet air duct includes an inlet air duct connected with the air chamber, and also a blockage clearing device for sweeping stone coal at the connection of the inlet air duct and the air chamber. The blockage clearing device includes a gas source and an outlet pipe connected with the gas source. The outlet pipe has an outlet orientated towards the air chamber, and the blockage clearing device also includes a control valve controlling the opening and closing of the outlet. When stony coal is accumulated at the junction of the inlet air duct and the air chamber, the control valve controls the opening of the outlet on the outlet pipe, and the gas in the gas source ejects from the outlet. The instantaneous released gas blows the accumulated stony coal into the air chamber to be swept into the stony coal outlet and discharged by the scraper, thus avoiding stony coal accumulation at the junction between the inlet air duct and the air chamber and blocking the inlet air duct. The energy consumption of the fan ensures the uniform distribution of air flow and temperature at the impeller.
【技术实现步骤摘要】
防止入口风道堵塞的磨煤机
本技术涉及一种防止入口风道堵塞的磨煤机。
技术介绍
磨煤机是一种将煤块破碎并磨成煤粉的机械设备,主要用于研磨无烟煤、烟煤、贫煤、褐煤,广泛应用于电力、冶金、建材、化工等行业的煤粉制备系统。现有的磨煤机的结构如图1所示,包括磨煤机壳体6,磨煤机壳体6的下方对接地设有风室1,风室1上连接有入口风道11,风室1内设置有刮板8,风室1的底部设有石子煤排口10,风室1的下方设置有电机2,风室1的上方设有磨盘3,磨盘3与风室1连通,电机2与磨盘3传动连接,磨盘3的外壁上固定设置有叶轮5,磨盘3的上方设置有磨辊4,磨盘3上与磨辊4对应的位置处设有环槽,磨煤机壳体6的上方设有进料管7和分离器9。上述的磨煤机在使用时,未经处理的煤料经过进料管7进入磨煤机壳体6内并落在磨盘3上,在离心力的作用下,煤料被甩到磨盘3边缘的环槽内,经由磨辊4的研磨之后煤料被研磨为煤粉;经过入口风道11向风室1内吹入热风,热风经由叶轮5进入磨煤机壳体6内,研磨好的煤粉在磨盘3的边缘被热风吹至磨煤机壳体6上方的分离器9内,经过分离器9的筛分,合格的细粉随热风一起吹出磨煤机壳体6,不合 ...
【技术保护点】
1.防止入口风道堵塞的磨煤机,包括与风室连接的入口风道,其特征在于:还包括用于吹扫入口风道与风室连接处的石子煤的清堵装置,所述清堵装置包括气源和与气源连接的出气管,出气管具有朝向风室方向的出气口,所述清堵装置还包括控制所述出气口开闭的控制阀。
【技术特征摘要】
1.防止入口风道堵塞的磨煤机,包括与风室连接的入口风道,其特征在于:还包括用于吹扫入口风道与风室连接处的石子煤的清堵装置,所述清堵装置包括气源和与气源连接的出气管,出气管具有朝向风室方向的出气口,所述清堵装置还包括控制所述出气口开闭的控制阀。2.根据权利要求1所述的防止入口风道堵塞的磨煤机,其特征在于:所述出气管具有位于入口风道内并沿入口风道内的气流的运动方向延伸的吹扫段,出气管的出气口位于吹扫段靠近风室的端部。3.根据权利要求2所述的防止入口风道堵塞的磨煤机,其特征在于:所述出气管为L形结构,出气管包括与所述气源连接的连接段和与连接段垂直连接的延伸段,所述吹扫段由延伸段形成。4.根据权利要求2所述的防止入口风道堵塞的磨煤机,其特征在于:所述出气管间隔设置有多个。5.根据权利要...
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