Spiral-wound reverse osmosis membrane element, and water purifier

Abstract

The invention discloses a spiral-wound reverse osmosis membrane element, and a water purifier. The spiral-wound reverse osmosis membrane element comprises a center pipe assembly comprising a pure water pipe, and a plurality of waste water pipes which are arranged around the pure water pipe at intervals, and a plurality of reverse osmosis membrane groups; one end of the pure water pipe is providedwith a pure water outlet; one end of each waste water pipe is provided with a waste water outlet; the front surface of each reverse osmosis membrane group is folded after one end of the reverse osmosis membrane group passing through a gap between the pure water pipe and a waste water pipe so as to form a water inlet channel communicated with the corresponding waste water pipe; a water production channel communicated with the pure water pipe is formed by the back surfaces of two adjacent reverse osmosis membrane groups; the back surface of at least one reverse osmosis membrane group selected from two adjacent reverse osmosis membrane groups is provided with first waterproof adhesive tape; when the reverse osmosis membrane groups are at unfolded states, the first waterproof adhesive tape isarranged to be close to one end of the pure water far away from the pure water outlet. The above structure design is capable of reducing the discharge area of the water production channel, increasingwater speed in the water production channel, and is beneficial for reduction of the pollution speed of the reverse osmosis membrane groups.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis water purification, in particular to a spiral-wound reverse osmosis membrane element and a water purifier. Background technique [0002] Spiral-wound reverse osmosis membrane elements, also known as spiral-wound reverse osmosis membrane elements, are commonly used elements in water treatment technology. A sheet group, the central tube group includes a pure water pipe and a plurality of waste water pipes arranged at intervals around the pure water pipe, and one end of the pure water pipe is provided with a pure water outlet, and one end of each waste water pipe is provided with a waste water outlet; The front side of each reverse osmosis membrane group is folded in half after passing through the pure water pipe and the waste water pipe of the central tube group at one end of the reverse osmosis diaphragm group to form a water inlet channel connected with the waste water pipe. Two adjacent r...

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Problems solved by technology

[0003] Since the pure water in the produced water channel can only be discharged from the pure water pipe, this will cause the water flow velocity at the side of the produced water channel close to the pure water outlet of the pure water pipe to be faster than that of the produced water channel away from the pure water pipe. The water flow velocity at one side of the pure water outlet will cause the concentration of pure water at one side of the water production channel adjacent to the pure water outlet of the pure water pipe to be higher than that of the pure water outlet of the water production channel away from the pure water pipe The concentration of pure water on one side of the reverse osmosis membrane group is not the same, which makes the side of the reverse osmosis membrane group away from the pure water outlet of the pure water pipe easy to be polluted

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