Rolled reverse osmosis membrane element with gradually-reduced inlet channel

Abstract

The invention discloses a rolled reverse osmosis membrane element with a gradually-reduced inlet channel, which is formed by winding a pure water guide net, a reverse osmosis membrane and an water inlet guide net around a central water production pipe in a superposition mode, and the inlet water guide net and the pure water guide net are respectively arranged in a water inlet channel formed by aninternal surface of the folded reverse osmosis membrane and a water production channel formed by the adjacent external surfaces of the folded reverse osmosis membrane. The rolled reverse osmosis membrane element disclosed by the invention is characterized in that three folding edges are formed at the side of the central water production pipe after the reverse osmosis membrane is folded, the middle folding edge is embedded into the water inlet channel, so that the water inlet channel is divided into front water inlet sub-channels at the upper and lower layers of the central pipe side and a rear water inlet sub-channel at a concentrated water outlet side, and the water inlet guide net is divided into a large water inlet guide net and a small water inlet guide net, the large water inlet guide net is arranged in one of the front water inlet sub-channels and the rear water inlet sub-channel, and the small water inlet guide net is only arranged at the other front water inlet sub-channel. The rolled reverse osmosis membrane element disclosed by the invention has the advantages of simple manufacturing mode, simpleness in implementation, and capability of realizing mass production.

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, microorganism, virus, organic matter and inorganic salt in water, and in particular to a roll-type reverse osmosis membrane with a decreasing water inlet channel element. Background technique [0002] The roll-type reverse osmosis membrane element is composed of several standard-size reverse osmosis membranes with exactly the same size, size and shape, a pure water diversion net, and an inlet diversion net wound around the central water production pipe. The existing roll-type reverse osmosis membrane element adopts an inlet diversion net with the same thickness and weave density. Since part of the influent water penetrates to the back of the reverse osmosis membrane to form pure water, the flow of the influent will become smaller and smaller. Under normal circumstances, the ...

AI Technical Summary

Problems solved by technology

[0004] However, in the actual production process, it is difficult to achieve gradual thickness of the water inlet and diversion net, and the water inlet and diversion net is connected by multiple small pieces of water inlet and diversion net with decreasing thickness, which lacks operability in mass production

Images