Working principle of hollow fiber ultrafiltration unit
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Working principle of hollow fiber ultrafiltration unit
The ultrafiltration membrane utilizes the intercepting ability of the porous material to remove a certain size of impurity particles in the water by physical retention. Under pressure, the small water, organic low molecular weight, inorganic ions and other substances in the solution can reach the other side of the membrane through the micropores in the fiber wall, and the large size such as bacteria, colloids, particulate matter and organic macromolecules in the solution. The substance cannot be trapped through the fiber wall to achieve the purpose of sieving the different components of the solution. The process is normal temperature operation, no phase change, no secondary pollution.
The physical sieving process that uses pressure as a driving force to separate liquids by different pore sizes of ultrafiltration membranes. The molecular cut amount (CWCO) is generally from 6,000 to 500,000 and the pore diameter is 100 nm (nanometer). The membrane used for ultrafiltration is an asymmetric membrane, and the surface active separation layer has an average pore diameter of about 10 to 200, and can intercept macromolecules and colloidal particles having a molecular weight of 500 or more, and the operating pressure difference is 0.1-0.5 MPa.
Performance and role of hollow fiber ultrafiltration unit :
(1) High precision: thoroughly remove bacteria, rust, colloids, macromolecular organic substances and other substances in water. The main indicators such as micro-elements and turbidity that purify human health are better than the sanitary standards for bottled drinking water.
(2) Long life: Because the ultrafiltration machine adopts the principle of vertical cross-filtering, it is automatically cleaned and not easy to be dirty. Therefore, under normal use, the life of the filter element is 30-50 times that of the ordinary water purifier.
(3) Large flux: It can meet the needs of direct drinking, beauty, bathing, eating, sanitation and so on.
(4) Low cost: Ultra-filtration flux and long life, it is an advanced membrane separation technology. The ultrafilter can effectively remove particles, colloids, bacteria, heat sources and organic substances in water, and is suitable for various production processes for separation, concentration and purification. Widely used in textile, chemical, pharmaceutical, food, environmental electronics and other industries.
Application range of ultrafiltration system
Pure water and ultrapure water system (also known as ultrapure water equipment) (apparatus for making pure water) equipment;
Medical sterile pyrogen-free water equipment;
Edible beverages, drinking water, mineral water purification, industrial separation, concentration, purification;
Industrial wastewater treatment, electrophoretic paint,