Why is the filtering precision of covering filter high

Source：m.scgift.com.cn Release date： 2025-04-15

The main reason for the high filtering accuracy of the cover filter is its membrane characteristics, filtering mode and structural design, as follows: 1. characteristics of filter membrane Small and uniform pore size: the pore size of the filter membrane used for covering the filter is usually in the micron level or even smaller, such as the common cellulose membrane and polysulfone membr

The main reason for the high filtering accuracy of the cover filter is its membrane characteristics, filtering mode and structural design, as follows:
1. characteristics of filter membrane
Small and uniform pore size: the pore size of the filter membrane used for covering the filter is usually in the micron level or even smaller, such as the common cellulose membrane and polysulfone membrane, whose pore size can be controlled between 0.1 μ m and 1 μ M. Such a small aperture can effectively intercept impurities such as micro particles, colloids and bacteria in water. Moreover, the uniformity of the pore size of the filter membrane is high, which means that all pore sizes are relatively consistent. In the process of filtration, only substances smaller than the pore size can pass through, so as to achieve high-precision filtration.
Adsorbability of material: the filter membrane material itself has certain adsorption performance. For example, some filter membranes have charges on their surfaces and can adsorb impurity particles with opposite charges in water through electrostatic action. Even particles with a size slightly smaller than the pore size of the filter membrane can be adsorbed and intercepted, further improving the filtration accuracy.
2. deep filtration mechanism
Multi layer filtration: the filter membrane covering the filter is not a simple surface filtration, but a deep filtration structure with a certain thickness. When water passes through the membrane, impurities will be intercepted and adsorbed at different depths of the membrane. This multi-layer filtration method increases the contact area and opportunity between impurities and the filter membrane, so that more impurities can be removed. For some particles with smaller particle size, it is also easier to be captured in the process of passing through the filter membrane, so as to achieve higher filtration accuracy.
Zigzag filter channel: there are zigzag and complex pore channels inside the filter membrane. When water flows in these channels, impurity particles are more likely to collide with the channel wall and be intercepted due to inertia, diffusion and other effects. Even small particles are difficult to pass through this complex channel, thus ensuring the high precision of filtration.
3. structural design of filter element
Tight installation: the filter element is usually installed very tightly inside the filter, which can ensure that water can only pass through the effective filtration area of the filter membrane when passing through the filter membrane, avoiding water leakage from the gap between the filter membrane and the filter shell or other non filtration areas, ensuring that all water is filtered through the high-precision filter membrane, thus improving the overall filtration accuracy.
Uniform water flow distribution: the structural design of the covering filter can make the influent evenly distributed on the surface of the filter element, avoiding the situation that the local water flow is too large or too small. This can ensure that all parts of the filter membrane can play the filtering role evenly, and avoid the poor filtering effect in some areas due to uneven water flow, so as to ensure the overall filtering accuracy.

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