The family unit has six specifications. Points A, B, C three types, A-type setting hopper, B-type set drawer, C type that is not no ash bucket with drawers, the lower flange according to claim directly connected with the top of your library, silos and other dust equipment situ dust, dust recovered directly. Stand-alone dust collector is designed for cement silo top reservoir bottom, conveyor belts, and local sources of dust removal and design can also be used in other industries to use local sources of dust removal. It has small, handling large air volume, compact structure, easy to use and reliable. Down on the dust cleared from dust directly into the warehouse, but also directly on the belt. Lower gas from the precipitator dust into the dust, the bag filtration, clean air from the fan discharge. After working for some time precipitator, dust bag on the bag resulting in increased resistance gradually increased, the need for cleaning, after cleaning, dust and normal work.