Raw water channel spacer, and spiral membrane element having same

A helical, membrane element technology, applied in the field of raw water flow path spacers, can solve the problems of reduced volume, increased osmotic pressure, and inability to obtain permeated water, and achieves the effect of inhibiting the formation of a concentration polarization layer
CN108495701BActive Publication Date: 2019-10-11NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NITTO DENKO CORP
Publication Date
2019-10-11

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Abstract

An object of the present invention is to provide a raw water channel spacer capable of suppressing the formation of a concentration polarization layer in a region near a separation membrane in a raw water channel, and a spiral membrane element including the same. For the raw water flow path spacer 40, it is formed by superimposing the first yarn row M and the second yarn row N, and it is provided with the first mesh structure 52 and the second mesh structure 61 alternately, so The first network structure 52 is formed by connecting the first quadrilateral grids 52a to 52c formed by the yarn rows M and N along the extending direction of the second yarn row N, and the second network structure 61 is formed by the first The two yarn rows are connected along the direction in which the yarn rows N extend such that the interval between the two yarn rows is narrower than the interval between the second yarn rows N constituting the first network structure 52 .
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Description

technical field

[0001] The present invention relates to a spiral membrane element that separates components dissolved and present in a liquid, and in particular to a raw water channel spacer of the spiral membrane element. Background technique

[0002] In recent years, attempts have been made to produce water more suitable for drinking by filtering ions, salts, etc. contained in tap water, etc., using separation membranes such as spiral membrane elements.

[0003] The spiral membrane element includes a water collection pipe and a plurality of separation membranes wound around the water collection pipe. For each separation membrane, the separation membrane is laminated on both sides of a sheet-shaped water-permeable spacer, and in this state, the three sides are sealed by means of adhesion or the like, and the other side is used as an open end to form a bag shape. . In addition, the open end is connected to the water collection pipe, thereby being configured so that the per...

Claims

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