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Water purifier filter membrane types and differentiating

Sources: | Release date: 2018-04-11 | Views:
Keyword: Water purifier filter membrane types and differentiating

According to the shape of the film:
Flat film: Like the paper, the shape is relatively easy to form, and it is easy to realize fully automated production.

Tubular membrane: Diameter 0.8-2mm, when used without support carrier, and the membrane made of filter element, the membrane area per unit volume is larger, but the formation is difficult, and the process and equipment requirements are higher.

Classified by material:
Ceramic membrane: advantages, high temperature resistance; disadvantages, high cost, small water output, difficult to clean, filtration accuracy of 0.2-0.5um, can not 100% filter out bacteria, viruses in the water, to regularly flush or backwash the filter, filter Life is about 9-12 months.

Polysulfone: The first generation of materials for ultrafiltration membranes. Advantages: easy to film, a strong, high strength, creep resistance, dimensional stability, heat resistance, acid and alkali resistance, chlorine resistance and anti-oxidation advantages.

Li Sheng PVC alloy film: Advantages: high porosity, uniform, large amount of water, more pressure, wear resistance, dirt, corrosion resistance. Therefore, it has the rigidity of polysulfone (PS), the hydrophilicity of polyacrylonitrile (PAN), and the toughness of polyvinylidene fluoride (PVDF).

PVDF (Polyvinylidene fluoride) Ultrafiltration Membrane: A common high-quality membrane material, various performance indicators of PVDF UF membrane have reached the international advanced level.

Others include polypropylene (PAN), polyethersulfone, cellulose acetate, and the like.

Ultrafiltration membrane according to the way of water classification:
Internal pressure type: The source water enters from the inner wall of the tube, and the clean water comes out from the outer wall of the tube. Concentrated dirty water can be recovered through automatic cleaning.

External pressure type: The source water enters from the outer wall of the tube, and the clean water comes out from the inner wall of the tube. The concentrated liquid is outside the tube. The filter element needs to be washed out to recover the flux.


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