The influence of different materials on filtration efficiency

In modern industrial production and daily life, dust filter elements, as key filtering equipment components, play a vital role. They can effectively remove dust, particles and other pollutants in the air to ensure air quality and the safety of the working environment. However, the filtration efficiency of dust filter elements depends largely on the choice of their materials. This article will explore the influence of different materials on the filtration efficiency of dust filter elements.

First, glass fiber is a commonly used material for dust filter elements. It has high filtration efficiency, especially for dust particles above 5 microns. The filtration efficiency of glass fiber filter elements can reach the primary efficiency or even the medium efficiency level, and the resistance is small and relatively stable during use. In addition, glass fiber also has good high temperature resistance and corrosion resistance, which enables it to maintain a long service life in various harsh environments.

Secondly, non-woven fabrics are also one of the common materials in dust filter elements. Non-woven filter elements can effectively filter large particles of dust and impurities, and the filtration efficiency of dust particles above 5 microns is usually between 35%-95%. Non-woven filter elements are moderately priced and cost-effective, so they are widely used in many industrial fields. However, the resistance of non-woven filter elements will gradually increase with the increase of usage time, and they need to be replaced regularly to maintain the filtration efficiency.

As another common dust filter element material, metal filter mesh has relatively low filtration accuracy and is mainly used to intercept larger particles of dust and impurities. The advantages of metal filter mesh filter elements are high strength, wear resistance, not easy to be blocked by impurities, and can be repeatedly washed and recycled. However, due to the large filtration aperture of metal filter mesh, the filtration effect for tiny particles is not ideal.

In addition, synthetic fibers and paper materials are also common materials in dust filter elements. Synthetic fiber filter elements have low resistance, smooth air flow, and can ensure the air volume of the ventilation system. Paper filter elements are environmentally friendly and can be recycled. However, paper filter elements are relatively easy to absorb moisture and break, have a relatively short service life, and the filtration efficiency may be affected in humid environments.

It is worth noting that dust filter elements of different materials may be subject to some restrictions under certain circumstances. For example, metal filter meshes may react chemically in the presence of certain chemical materials, causing the filter bag to fail. Although high-performance engineering plastics such as polyethersulfone (PES) have excellent chemical stability and corrosion resistance, their filtration capacity may be affected in the presence of oxidants such as hydrogen peroxide.