近几年来,我国先后建成并投产了几座利用褐煤发电的大型电厂,其制粉系统都采用风扇式磨煤机直吹式系统,出口均装设有双通道带撞击锥的惯性分离器。已投入运行的电厂,通过几年的运行实践表明,分离器出口温度偏低。影响分离器出口温度低的因素很多,其中之一是制粉系统的风扇式磨煤机和分离器散热损失较大。因为已投入运行和即将投产的电厂的磨煤机和分离器均未进行保温,特别是惯性分离器的体积和表面积比较大,在总的散热损失中所占比例也就大。为减少散热损失和提高 In recent years, China has built and put into operation several large-scale power plants that utilize brown coal for power generation. The pulverizing systems of the pulverized coal mills use a fan-type direct pulverizer system. Both exporters are equipped with dual-channel inertial separators with impact cones. Has been put into operation in power plants, after several years of operational practice shows that the separator outlet temperature is low. There are many factors that affect the low outlet temperature of the separator. One of them is that the pulverizer and the separator of the pulverizing system have larger heat loss. Because both the coal mill and the separator of the power plant that have been put into operation and are going to be put into operation are not insulated, in particular, the inertial separator has relatively large volume and surface area, and accounts for a large proportion of the total heat loss. To reduce heat loss and increase