Coiled reverse osmosis membrane element

Abstract

The invention discloses a coiled reverse osmosis membrane element, which is formed by winding at least one group of water purification membranes on a central water yielding pipe, wherein the water purification membrane group consists of a purified water guide net, a reverse osmosis membrane and a water inlet guide net which are overlapped; a water inlet flow channel is formed by folding the innersurface of the reverse osmosis membrane, and a water yielding flow channel is formed between the adjacent outer surfaces; the water inlet guide net is positioned in the water inlet flow channel; the purified water guide net is positioned in the water yielding flow channel; the water yielding flow channel only has a purified water outlet facing the central water yielding pipe, and other three sides of the water yielding flow channel are closed and sealed; the partial zones, far away from the central water yielding pipe, on the two sides, adjacent to a folded side, of the water inlet flow channel which are closed and sealed; so a small section raw water inlet is formed on the two sides close to the central water yielding pipe respectively and a thick water outlet is formed on the side of the water inlet flow channel opposite to the folded side. Through improvement, the reverse osmosis membrane element of the invention increases the water velocity on the surface of the membrane, reduces the concentration polarization on the surface of the membrane, and reduces the pollution speed of the coiled membrane element so as to prolong the service life of the membrane element.

Description

technical field [0001] The invention belongs to the technical field of water purification treatment, and relates to a reverse osmosis membrane element for removing impurities such as sediment, silt, colloid, microorganisms, viruses, organic matter and inorganic salts in water, in particular to a roll-type reverse osmosis membrane element. Background technique [0002] Currently, if figure 1 , 2 As shown, the known roll-type reverse osmosis membrane element is formed by winding the water purification membrane group composed of pure water diversion net, reverse osmosis diaphragm and water inlet diversion net on the central water production pipe, wherein the reverse osmosis membrane The sheet is folded, the water inlet guide net is located in the water inlet channel formed between the folded inner surfaces of the reverse osmosis membrane, and the pure water guide net is located between the folded outer surfaces of the reverse osmosis membrane. In the water production flow cha...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a roll-type reverse osmosis membrane element, which is used to alleviate the phenomenon of concentration polarization on the membrane surface of the existing roll-type membrane element, overcome the pollution problem of the membrane element, and prolong the service life of the membrane element

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