Filter element filtration is a method of removing particulate matter from water by distributing on the surface of the filter medium, or being captured in the depth of the filter material. The filter elements include melt-blown filter elements, wire-wound filter elements, polypropylene folded filter elements, and sintered titanium rods. Filter elements, metal sintered filter elements, PE/PA tube sintered filter elements, etc. The filter elements are made of microporous membrane, cotton fiber, stainless steel, titanium, etc. This filtering device has a simple structure and is easy to operate, and is called a filter element filter.

In reverse osmosis systems, the final barrier for membrane feedwater pretreatment is a relatively sophisticated filtration device between microfiltration and granular media filtration. Because it can play a role in safety protection, it is also called a security filter.

The application of filter element

After particle filtration (or media filtration), before entering the reverse osmosis membrane, in order to remove large particles (such as pipeline rust products, etc.) The high-pressure pump is not harmed by accidental debris, and a cartridge filter is installed before the high-pressure pump. Usually, a 5-micron filter element is installed in the device. If the concentration of silica in the concentrated water exceeds the theoretical solubility value, it is recommended to use a 1-micron filter element to reduce the formation of iron and aluminum silicate and aluminum silicate colloids.

Filter elements generally need to be replaced before the pressure drop reaches the limit value of 0.2MPa, but in order to reduce microbial contamination, generally no more than three months. Considering that the recoil effect is not good, and in order to avoid microbial contamination and filter gap enlargement, it is not recommended to use backwash filter elements.

The setting of the 5 micron filter element filter is not for filtering a large amount of suspended solids, that is, it does not bear the filtering load, it only serves as a protection for the reverse osmosis device, otherwise the operating cost will be high, the efficiency will be very low, and the membrane may be damaged. frequently polluted.

For clean underground (well water) water, if no particulate media filter is used, in order to avoid the possibility of pollutants blocking the 5-micron filter or penetrating the 5-micron filter. A filter element filter with larger pores can be set in series before the 5 micron filter.