Push the hopper full of materials into the barrel first and seal it in the system with an air -pressure forecast device. Turn on the blower and adjust the throttle to establish a fluid bed. Air is taken in through the inlet and completely filte red by the air filter. Then the air holds up the materials by means of a heating device to form a boiling bed. The hot air dries the materials. At the same time, wet air goes through the colleting bag along the central part, enters the upper part, comes out of the blower along the pipe via the air gate and arrests dry grains and a few fine powders produced by impacts