Reverse osmosis membrane element and water purifying device

Abstract

A reverse osmosis membrane element comprises a central tube and a reverse osmosis membrane assembly wound on the central tube, wherein the reverse osmosis membrane assembly comprises a water inlet separating net, a pure water guide net and reverse osmosis membranes; a pure water flow path is formed between the front interlayers of the reverse osmosis membranes; a water inlet flow path is formed between the reverse interlayers of the reverse osmosis membranes; the water inlet separating net is positioned in the water inlet flow path; the pure water guide net is positioned in the pure water flow path; a plurality of concentrated water inlets are formed in the central tube; the end of the central tube is used as a concentrated water outlet of the reverse osmosis membrane element; the reverse osmosis membrane element is provided with two water inlets; the two water inlets are respectively positioned in two end surfaces of the reverse osmosis membrane element; the pure water inlet of the reverse osmosis membrane element is positioned in the circumferential surface of the reverse osmosis membrane element. The reverse osmosis membrane element has the advantages that the pollution speed of the reverse osmosis membrane element can be reduced effectively, the service life of the reverse osmosis membrane element is prolonged, and meanwhile, water production efficiency is improved. The invention further provides a water purifying device.

Description

technical field [0001] The invention relates to the field of water purification systems, in particular to a reverse osmosis membrane element and a water purification device. Background technique [0002] see figure 1 , the working principle of the existing reverse osmosis membrane elements is that the direction of the raw water inlet and concentrated water outflow is parallel to the central tube, and the direction of the product water outflow is perpendicular to the central tube. By sealing the three sides of the membrane bag away from the central tube, the Realize the separation of raw water, concentrated water and pure water. The reverse osmosis membrane element of this structure has the following problems: (1) The raw water flow channel is long, and there is a transition area where the water flow in the raw water flow channel is from the inlet to the concentrated water outlet, and there is an area with extremely low water flow velocity, and the end of the reverse osmosis...

AI Technical Summary

Problems solved by technology

The reverse osmosis membrane element of this structure has the following problems: (1) The raw water flow channel is long, and there is a transition area where the water flow in the raw water flow channel is from the inlet to the concentrated water outlet, and there is an area with extremely low water flow velocity, and the end of the reverse osmosis membrane element There is serious pollution, resulting in a rapid decline in the performance of reverse osmosis membrane elements

(2) The inlet flow channel is small, the pollutants are not easy to wash away, and the reverse osmosis membrane elements cannot be effectively washed

(3) The concentrated water end of the reverse osmosis membrane element is seriously polarized relative to the concentration difference at the water inlet end, and the concentrated water end is seriously polluted

(4) The pure water is collected through the central tube, the resistance is relatively large, the back pressure in the pure water channel is relatively large, and the water production efficiency is low

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