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The structure, material, and performance of the HEPA filter screen
The structure, material, and performance of the HEPA filter screenThere are many differences in the structure and materials of air filter screens. There are also some differences in the use environment and air purification efficiency of different HEPA filter screens. For example, there are great differences between the filters of coarse and medium efficiency HEPA filters and those of HEPA filters. The filters used by coarse and medium efficiency HEPA filters are relatively loose, and the chemical fiber cloth with higher air permeability is used as the filter material, but the HEPA filter uses some fiberboard or synthetic fiber materials with higher density and better filtering effect as the filter material. Material.The structure and material of the HEPA filter determine the filtration accuracy. Filtration accuracy is the ability to remove particulate pollutants of different sizes, and it is the main performance indicator for evaluating the performance of the filter. When selecting a HEPA filter, we focus on filtration accuracy. Filtration accuracy is directly related to the pore size and distribution of the filter material, and the pore size is affected by the diameter of the fiber material. The fiber material of the HEPA filter has a smaller diameter, higher distribution density, and uniformity, and can be applied to various purification requirements in different occasions. Although there are many materials used for air filter screens, there are few commonly used materials. At present, the more common HEPA filters are bag-type HEPA filters. The material of these filters is chemical fiber. Although the filtration effect is not high, they have a large dust capacity and are not easily damaged. They are usually used for primary filtration in purification systems. For the filter screens of high-efficiency filters, most products are made of glass fiber materials. These fibers have the characteristics of a circular cross-section and a constant diameter. They are easier to control and use than natural fibers and very fine fibers can be produced. Therefore, the filtering effect is very high. They can be recognized by many companies in the industrial market. Similarly, glass fiber materials are resistant to high temperatures, not easy to damage, and corrosion-resistant, and are suitable for conventional purification environments such as medical and food, as well as for purification environments. Petroleum and chemical fields. The materials of air filter screens also include some high-end material types, such as ceramic fiber filter screens. It is an ideal material for high-efficiency filter screens. It can be used for smoke adsorption in steel plants and chemical plants. The filtering effect is very high. However, the material has general mechanical properties and inhalability, so it has not been effectively promoted. |
