Physical filtration process of air adsorption filter

Air pollution has become a major challenge facing today's society, posing a huge threat to people's health and the environment. In response to this problem, air adsorption filters, as an important air purification device, effectively remove particulate matter in the air through physical filtration to provide users with a clean air environment.
The physical filtration process of air adsorption filters is mainly achieved by the filter. The filter is a mesh structure made of fiber material with fine pores that can effectively intercept particulate matter in the air. The material and structure of the filter directly affect the filtration effect and service life.
The material of the filter is usually polyester fiber, glass fiber and other materials, which have good filtration effect and long service life. There are also many options for the structure of the filter, such as single-layer mesh, multi-layer mesh and composite mesh. Increasing the number of layers and density of the filter can improve the filtration efficiency, but it will also increase the air resistance.
The key to physical filtration lies in the interception of particles by the filter. When air passes through the filter, the particles will be trapped on the filter due to their larger size, while the clean air continues to flow through the filter.
The pore size of the filter determines the size range of particles that can pass through. According to the size of particles, they can be divided into large particles, medium particles and fine particles. Large particles usually have a large mass and volume and are easily intercepted by the filter. The size of medium particles is between large particles and fine particles, and its interception effect depends on the pore size and structure of the filter. Fine particles are smaller in size and require smaller pores to be effectively intercepted.
Filtration efficiency is an important indicator to measure the physical filtration process of air adsorption filters. Filtration efficiency is usually expressed by the grade of the filter. Common grades are H10, H11, H12, H13 and H14, among which H14 has the best filtration effect.
The level of filtration efficiency depends on the material, structure and pore size of the filter. The selection of materials should have a high filtration effect and a long service life. The structure of the filter should be reasonably designed to improve the interception effect of particles. The pore size should be selected according to the size range of particles to achieve the best filtration efficiency.
However, the improvement of filtration efficiency will increase the resistance of the air, so the design of the filter also needs to consider the balance of resistance. The service life of the filter will also be affected by the accumulation of particles and the clogging of the filter. Regularly cleaning or replacing the filter can extend the life of the filter.