Boiling drier is also call as fluidize-bed. lt consists of air filter, heater, fluidized-bed main machine, feeder, cyclone seperator, cloth bag duster, high-pressure centrifuge fan and operation table. Because the properties of raw material exist difference, when equip the dust removing equipment, it should consider the practical need. It can select cyclone seperator and cloth bag duster at the same time or one of them. In genral speaking, it needs to select cyclone seperator only for raw material that is large in specific gravity and cloth bag duster for powder and small granule raw materials that is light in gravity. Meanwhile there is air feeding device and belt conveyor for seletion.