he working principle of filter bags is mainly based on functions such as screening, interception, and adsorption. Taking liquid filter bags as an example, when the liquid flows from the inside to the outside of the filter bag, particles larger than the pore size of the filter bag will be directly intercepted inside the bag, which is the screening function. For some smaller particles, although they can pass through the pore size of the filter bag, they will be retained inside the filter bag due to the interception of the filter bag fibers and the mutual collision of particles, which belongs to the interception function. In addition, the material of the filter bag itself may have certain adsorption properties for some substances, which can adsorb some tiny impurities and pollutants, further improving the filtration effect.
In the entire filtration system, filter bags work together with filter containers, support baskets, etc. The liquid or gas to be filtered is injected from the top of the filter bag supported by the support basket, making the fluid evenly distributed on the entire surface of the filter bag, avoiding adverse factors such as turbulence. This design can make full use of the filtration area of the filter bag and improve the filtration efficiency. Moreover, the filtered particles are intercepted inside the bag, and the filtered fluid will not be contaminated when replacing the filter bag. Some filter bags are also designed with handles for quick and convenient replacement of filter bags.