Centrifugal Fan, which is equipped with a microcomputer assisted with the suction system and suction powder, can control the time of suction and discharge, the alarmsfor high and low material-level alerts and the timing of material breaks. The suction systemnot only can eliminate dust and keep the plant clean but also maximize the plant space at the optimization of pipeline installation. Optional rear-mounted cyclone filters or motor-does-not-stop systemand other accessories are provided.