Spiral-wound membrane assembly, composite filter element assembly and water purification system

Abstract

The invention provides a spiral-wound membrane assembly, a composite filter element assembly and a water purification system. The spiral-wound membrane assembly comprises: a central pipe (1) made of afilter material capable of allowing fluid to pass through; a spiral-wound membrane (2) arranged around the periphery of the central pipe (1) in a winding manner; wherein the spiral-wound membrane (2)can allow a fluid to pass through and filter the fluid, a raw water inlet (21) is formed in the spiral-wound membrane (2), and the raw water inlet (21) is formed in one end of the spiral-wound membrane (2) in the axial direction of the central pipe (1) and is close to the central pipe (1) in the circumferential direction; and one end, along the axial direction of the central pipe (1), of the spiral-wound membrane (2) is sealed at a position far away from the central pipe (1) along the circumferential direction. According to the invention, the flow path of the pure water flow channel is effectively reduced, the pure water flow channel is shortened, the flow resistance of pure water is reduced, the water production efficiency of a reverse osmosis filter element is improved, and the flux isincreased.

Description

technical field [0001] The invention belongs to the technical field of water purification, and in particular relates to a coiled membrane module, a composite filter core module and a water purification system. Background technique [0002] The existing reverse osmosis filter element is usually made of a single membrane leaf or a simple double-layer membrane leaf rolled around the central tube, and the outlet flow channel is too long. The prepared pure water has a long flow distance in the reverse osmosis membrane, which results in a relatively large flow resistance of the pure water in the reverse osmosis membrane, making the water production efficiency of the reverse osmosis filter element low and the flux small. Moreover, the center tube of the existing reverse osmosis filter element is made of plastic or metal with a through-hole body, and the reverse osmosis membrane is directly rolled on the center tube, which makes the volume of the integrated rolled reverse osmosis mu...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the relatively long flow distance of pure water in the reverse osmosis membrane in the composite filter element of the water purifier in the p

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