Anti-fouling reverse osmosis membrane

Abstract

This utility model relates to the field of reverse osmosis membrane technology, specifically to an antifouling reverse osmosis membrane, comprising an upper membrane unit, a central tube assembly, and a lower membrane unit. These three structures are fixed together by adhesive bonding. The central tube assembly includes a guide frame and an inner tube, with one end of the inner tube connected to the guide frame. Through this central tube assembly structure, during reverse filtration, the liquid enters from the tail of the guide frame, is accelerated by its triangular structure, and flows into the elliptical inner tube for further filtration. It then enters the front guide frame, is accelerated again, and flows into the front inner tube before finally exiting through the last set of inner tubes, achieving multiple reverse filtration functions. The narrow flow channel results in a high overall membrane surface velocity, alternating shear stress on the membrane surface, and good turbulence. Alternating areas of increased local flow velocity further enhance the turbulence effect and concentration polarization resistance, improving the antifouling properties of the central tube assembly.

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