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

Active Publication Date: 2019-10-11
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes a problem that the osmotic pressure in the vicinity of the membrane surface of the separation membrane increases, so that the amount of permeated water permeated through the separation membrane decreases, and the permeated water cannot be efficiently obtained from raw water.

Method used

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  • Raw water channel spacer, and spiral membrane element having same
  • Raw water channel spacer, and spiral membrane element having same
  • Raw water channel spacer, and spiral membrane element having same

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0036] Hereinafter, a filtration device including a spiral membrane element as one embodiment of the present invention will be described with reference to the drawings. In the following description, the "X" direction represents a direction parallel to the axial direction of the water collection pipe, and the "Y" direction and "Z" direction represent radial directions of the water collection pipe perpendicular to each other.

[0037] like figure 1 As shown, the filtration device 10 includes a raw water tank 12 for storing raw water such as tap water, and a spiral membrane element 20 for filtering the raw water. Raw water is supplied to the raw water tank 12 via, for example, a supply pipe L1. Furthermore, the raw water tank 12 is connected to a water supply pipe L2 that sends raw water to the spiral membrane element 20 . A pump 14 for drawing raw water from a raw water tank 12 and a pretreatment unit 16 for removing turbid components contained in the raw water are provided on...

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PUM

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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 .

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/00B01D63/10
CPCB01D63/10B01D2313/143B01D65/08B01D61/025B01D61/08B01D63/00B01D65/02B01D2313/146D04H3/02D04H3/04B32B27/12B32B3/28B01D63/107B01D2313/041
Inventor 冈崎友叶宇田康弘
Owner NITTO DENKO CORP
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