The Baghouse filter is a dry filter device. After the filter material has been used for a period of time, due to the effects of sieving, collision, retention, diffusion, static electricity, etc., a layer of dust accumulates on the surface of the filter Baghouse. This layer of dust is called the primary layer. In the subsequent movement process, the primary layer becomes The main filter layer of the filter material depends on the function of the primary layer, and the filter material with larger mesh can also obtain higher filtration efficiency. As dust accumulates on the surface of the filter material, the efficiency and resistance of the dust collector increase accordingly. When the pressure difference between the two sides of the filter material is large, some fine dust particles that have been attached to the filter material will be squeezed. Decrease the efficiency of the dust collector. In addition, excessive resistance of the dust collector will significantly reduce the air volume of the dust removal system. Therefore, after the resistance of the dust collector reaches a certain value, it must be cleaned in time. The primary layer should not be destroyed when cleaning dust, so as not to reduce the efficiency.