How to use the filter bag

Closed filter: The filter bag is used together with the matching filter, and the system fluid pressure is used to squeeze the liquid through the filter bag to achieve the purpose of filtration. It has the advantages of fast flow rate, large processing capacity, and long service life of the filter bag. It is particularly suitable for occasions where large flow requires closed filtration.

Gravity open filtration: The filter bag is directly connected to the pipeline through a suitable joint, and the fluid gravity pressure difference is used for filtration. Its notable feature is that it does not require equipment investment, and the filtration is simple and feasible. It is particularly suitable for small-scale, multi-species, intermittent economical liquid filtration.

Bag dust collector is a dry dust filtration device. It is suitable for capturing fine, dry, non-fibrous dust. The filter bag is made of textile filter cloth or non-textile felt, and the filtering effect of the fiber fabric is used to filter the dust-containing gas. When the dust-containing gas enters the bag dust collector, the dust with large particles and high specific gravity settles down due to the action of gravity and falls into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained, so that the gas is purified. Generally, the dust removal efficiency of new filter materials is not high enough. After the filter material has been used for a period of time, a layer of dust accumulates on the surface of the filter bag due to the effects of screening, collision, retention, diffusion, static electricity, etc. 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. Relying on the effect of the primary layer, the filter material with a larger mesh can also obtain a higher filtration efficiency. As the dust accumulates on the surface of the filter material, the efficiency and resistance of the dust collector increase accordingly. When the pressure difference on both sides of the filter material is large, some fine dust particles that have been attached to the filter material will be squeezed over, causing the dust collector efficiency to decrease. 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 is necessary to clean the dust in time. The primary layer must not be damaged during cleaning to avoid a decrease in efficiency.

The structure of the bag dust collector is mainly composed of the upper box, the middle box, the lower box (ash hopper), the cleaning system and the ash discharge mechanism.

The performance of bag filter is good or bad, in addition to the correct selection of filter bag materials, the cleaning system plays a decisive role in the bag filter. Therefore, the cleaning method is one of the characteristics that distinguish bag filters, and it is also an important part of the operation of bag filters.