Central tube group and spiral wound reverse osmosis membrane elements

Abstract

A center tube group and spiral wound reverse osmosis membrane element, the center tube group comprising: a pure water tube (100) and a plurality of waste water tubes (200) arranged in intervals to each other; a pure water inlet hole (110) connected to an internal passage of the pure water tube (100) is formed on a peripheral wall of the pure water tube (100); the plurality of waste water tubes (200) are arranged around the pure water tube (100); a waste water inlet hole (210) connected to an internal passage of the waste water tubes (200) is formed on a peripheral wall of each waste water tube (200); the plurality of waste water tubes (200) are spaced apart from the pure water tube (100) so as to form an accommodating space between each waste water tube (200) and the pure water tube (100) used for accommodating a part of a reverse osmosis membrane group (300) which extends into the center tube group.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis water purification, in particular to a central tube group and a spiral-wound reverse osmosis membrane element. 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 concentration. After entering the central tube, it flows out from one or both ends of the central tube....

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