Reverse osmosis element and preparation method thereof

Abstract

The invention discloses a reverse osmosis element and a preparation method thereof. The reverse osmosis element comprises a central pipe and at least one reverse osmosis membrane group, wherein one end of the central pipe is a water inlet end, water outlets are formed in the peripheral wall of the central pipe, and the reverse osmosis membrane group comprises a water inlet partition net, a first reverse osmosis membrane piece, pure water guide cloth and a second reverse osmosis membrane piece; one end of the water inlet partition net is connected with the peripheral wall of the central tube, the front surface of the first reverse osmosis membrane piece is connected with the water inlet partition net, the first end surface of the pure water guide cloth is connected with the reverse surfaceof the first reverse osmosis membrane piece in a matched mode, and the reverse surface of the second reverse osmosis membrane piece is connected with the second end surface of the pure water guide cloth cooperatively; and the water inlet partition net, the first reverse osmosis membrane piece, the pure water guide cloth and the second reverse osmosis membrane piece are wound around the outer circumference of the center tube. Through the reverse osmosis element, the service life of the reverse osmosis element can be improved effectively.

Description

technical field [0001] The invention relates to a reverse osmosis element and a preparation method thereof. Background technique [0002] Reverse osmosis water purifiers currently occupy an important position in the domestic household water purification market. However, most of the current reverse osmosis membrane elements adopt the traditional rolling process, that is, the reverse osmosis membrane group formed by superimposing the pure water guide cloth and the reverse osmosis membrane bag embedded with the concentrated water grid is wound and rolled on the central tube. The side end of the reverse osmosis membrane element rolled and formed by this method is the raw water inlet. After the raw water is purified by the membrane under pressure, the pure water flows from the inside of the membrane bag through the pure water guide cloth and collects to the central pipe with holes to flow out. The filtered concentrated water flows out from the other side of the membrane element....

AI Technical Summary

Problems solved by technology

The water inlet direction of this reverse osmosis membrane element is the same as the concentrated water discharge direction, but the internal flow channel of the membrane element is wide and the process is short, resulting in slow internal water flow, concentration polarization is prone to occur on the membrane surface, and pollutants in the water are easy to flow. Membrane surface is deposited and polluted, which reduces the desalination rate and water flux of the membrane element, and ultimately shortens the life of the membrane element

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