Author：Huamo Water treatment materials FROM：Water filter membrane manufacturer TIME：2021-11-26
The pvdf ultrafiltration membrane is a membrane element that uses pressure difference as the driving force for filtration, and is generally made of acetate fiber or characteristic fiber material. It is very suitable for the stripping and concentration of substance concentration, and the more commonly used can also be used for the separation of jelly mixtures that are difficult to separate by other technologies.
The structure of the pvdf ultrafiltration membrane is specifically divided into a symmetrical shape and an asymmetrical shape. The symmetrical membrane element is isotropic, has no skin, and has the same porosity in all parts, and belongs to the deep filter membrane element. The asymmetric membrane has a compact surface, with a finger-shaped structure as the core bottom part, the surface thickness is generally below 0.1μm, the microporous plate is arranged in an orderly manner, and the bottom wall thickness is 200-250μm, which belongs to the surface filter membrane element.
It has a unique pore size of 0.01-0.1µm, and uses the pressure of the membrane separation equipment on both sides as power. It can effectively remove germs, most of the virus infection, colloidal solution, mud and other chemical substances during use. The smaller the membrane diameter, the higher the sludge load. The generally used working pressure is 0.01-0.03MPa, and the relative molecular mass of the type pipe flow with a screening diameter of 0.005-0.1 is 10-50 thousand Daltons.