The main structure includes speed reducer,top head ,clean room ,radius arm organization ,straining chamber ,filter pocket module ,ash hopper ,pass air blower. The principles of work is as follow :the air current ,including the dust ,enters onto the space of the straining chamber ,under the centrifugal action of force ,the big pellet and the condensation dust particles fall ,along the tube wall, into the box ,then blow out through the ;the ground particles disseminate in the straining chamber ,to be isolated by the filter module .