Filter Bagis a dry filter device. It is suitable for capturing small, dry, non-fibrous dust. The filter bag is made of textile filter cloth or non-woven felt, and the dust filter is filtered by the filtering effect of the fiber fabric. When the dusty gas into the bag filter, large particles, than the heavy dust, due to the role of gravity sink down, fall into the ash bucket; with smaller dust in the gas through the filter, the dust is blocked, so that the gas Purify. Generally the new filter dust removal efficiency is not high enough.
Filter material used for some time, due to sieve, collision, stranding, diffusion, static and other effects, the bag surface accumulation of a layer of dust, this layer of dust called the first layer. In the course of the subsequent movement, the primary layer has become the main filter layer filter. Rely on the role of the primary layer, the larger the filter can also get a higher filter efficiency. With the accumulation of dust on the surface of the filter, the efficiency and resistance of the precipitator are correspondingly increased, when the pressure difference on both sides of the filter, it will be attached to some of the filter on the fine dust particles squeezed in the past, So that the efficiency of the precipitator. In addition, the excessive resistance of the dust collector will significantly reduce the air volume of the dust removal system. Therefore, the resistance of the precipitator to a certain value, it is necessary to timely cleaning. Cleaning can not damage the primary layer, so as to avoid the decline in efficiency.