It adds side opening; air inlet and middle maintenance aisle, improves the fixing method of the filter bag, is conducive to the diffusion of dusty air, reduces the washing of the filter bag by the airflow, it is convenient to change the bag and check the bag, and can reduce the headroom of the workshop, It has the characteristics of large gas processing capacity, high purification efficiency, reliable working performance, simple structure, small maintenance, etc. It is especially suitable for capturing small and dry non-fibrous dust. Special form equipment can also be customized, and users can order according to their needs.