Spiral-wound reverse osmosis membrane element, membrane winding method thereof and reverse osmosis water purifier

Abstract

The invention discloses a spiral-wound reverse osmosis membrane element, a membrane winding method thereof and a reverse osmosis water purifier. The spiral-wound reverse osmosis membrane element comprises a plurality of reverse osmosis membrane groups and a central tube stack, wherein the central tube stack comprises a purified water tube and a plurality of waste water tubes which are spaced from one another; the waste water tubes surround the purified water tube; each reverse osmosis membrane group is provided with a first part positioned inside the central tube stack and a second part positioned outside the central tube stack; each waste water tube is isolated from the purified water tube by the first part of the corresponding reverse osmosis membrane group; and the second parts of the reverse osmosis membrane groups form a multi-layered thin-membrane assembly which surrounds the periphery of the central tube stack. By the technical scheme, the recovery rate of raw water can be increased, and water conservation is high.

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, a membrane rolling method for the spiral-wound reverse osmosis membrane element and a reverse osmosis water purifier. Background technique [0002] The spiral-wound reverse osmosis membrane element, also known as the spiral-wound reverse osmosis membrane element, is a common element in water treatment technology. It generally has a cylindrical pressure vessel as the shell, and a central tube with multiple holes inside it. And alternately stacked multi-layer reverse osmosis membranes and diversion nets rolled on the central pipe. The central tube is connected with the two ends of the housing through connectors. When in use, the raw water enters the shell from one end of the shell, and under the action of pressure, part of it passes through the reverse osmosis membrane to form water with a lower concentrat...

AI Technical Summary

Problems solved by technology

[0003] In the spiral-wound reverse osmosis membrane element in the prior art, after the raw water is treated, a large part is discharged as waste water, and only a small part becomes pure water, especially the large-flux spiral-wound reverse osmosis membrane element. The proportion of water in the raw water is relatively small, and the recovery rate of raw water is low, resulting in waste of raw water

Images