The invention belongs to the technical field of separation equipment, and particularly relates to a
backflow isolation type coarse
powder separator which comprises a conical
barrel, the upper end of the conical
barrel is communicated with a
barrel cover, the center of the lower end of the conical barrel is communicated with an air inlet
pipe, the lower end of the conical barrel and one side of the air inlet
pipe are communicated with a
backflow pipe, and one side of the barrel cover is communicated with an air outlet pipe. A transmission box is fixedly connected to the inner top wall of the barrel cover, a rotating pipe is rotatably connected to the center position of the barrel cover, the rotating pipe vertically penetrates through the transmission box and is rotatably connected with the transmission box, and the part, located below the transmission box, of the rotating pipe is fixedly sleeved with a flat steel rotor. The
coal pulverizing
system has the advantages that by arranging the
backflow cover, two-phase flow just entering the conical barrel can be prevented from intersecting with falling backflow coarse
powder during coarse
powder separation work, so that the air outlet efficiency of the
coal pulverizing
system is improved, the
coal pulverizing
energy consumption is reduced, and maintenance is simpler and more convenient.