Raw water in the hollow fiber outside or inside the cavity pressure flow, respectively composed of external pressure type and internal pressure type. Ultrafiltration is a dynamic filtration process, the trapped material can be removed with concentrated water, does not block the membrane surface, can run continuously for a long time. Ultrafiltration membrane is one of the earliest polymer separation membranes.
Ultrafiltration technology is a kind of high and new technology widely used in water purification, solution separation and concentration, as well as the extraction of useful substances from wastewater, wastewater purification and reuse. It is characterized by a simple use process, no heating, energy-saving, low-pressure operation and small device area.