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Spiral separation membrane element

A separation membrane, spiral technology, applied in the field of spiral separation membrane elements, to maintain the suppression effect, reduce the pressure loss, and increase the void ratio.

Active Publication Date: 2008-01-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the cross-sectional shape of the mesh constituting wires of any of the above-mentioned supply side flow path materials is circular, and the thickness is constant. There are deficiencies in the pressure loss of the flow path

Method used

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  • Spiral separation membrane element
  • Spiral separation membrane element
  • Spiral separation membrane element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0072] (1) In the above-mentioned embodiment, the two types of straight mesh constituting filaments are all examples of being arranged in a direction oblique to the flow direction of the stock solution, but the supply-side channel material in the present invention may contain The mesh constituting filaments whose flow direction is inclined may have, for example, the shapes shown in FIGS. 5( a ) to ( b ).

[0073] In the example shown in Fig. 5 (a), the mesh constituting wires 2a and 2c are both linear, but one of the mesh constituting wires 2a is arranged in a direction oblique to the stock solution flow direction, and the other mesh constituting wires 2c is arranged parallel to the flow direction of the stock solution. Even in this case, one net constituting wire 2a has a cross-sectional portion in which the wire diameter X in the direction parallel to the stock solution flow surface is larger than the wire diameter Y in the direction perpendicular to the stock solution flow ...

Embodiment 1～2

[0081] The nets shown in Table 1 below and Figures 6 to 7 produced by the fusion method were installed in a parallel plate unit (C10-T; flow path width 35 mm, flow path length 135 mm), and the flow rate and flow rate when pure water flowed were measured. pressure loss. The results are shown in Fig. 1 .

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Abstract

A spiral separation membrane element that without changing of the outer diameter and inner diameter of water collection pipe, realizes reducing of the pressure loss by permeated water flow within the water collection pipe. There is provided a spiral separation membrane element having a perforated water collection pipe around its circumference spirally wound by a laminate of separation membrane, supply-side flow channel material and permeated-water-side flow channel material, characterized in that the supply-side flow channel material (2) includes net forming yarn (2a) in a direction inclined to the direction of raw liquid flow, and that the net forming yarn (2a) has a section portion where the yarn diameter (X) in the direction parallel to the plane of raw liquid flow is larger than the yarn diameter (Y) in the direction perpendicular to the plane of raw liquid flow, and that the yarn diameter (Y) at central portion (P1) between intersection point portions of the net forming yarn (2a) is smaller than that at intersection point portions (P2).

Description

technical field [0001] The present invention relates to a spiral separation membrane element that separates components present in a liquid, and more specifically, to a spiral separation membrane element that incorporates a supply-side flow path material that can separate the supply-side flow The pressure loss of the channel is reduced to be smaller than that of the past, and it has the necessary stirring effect for suppressing the concentration polarization on the membrane surface. Background technique [0002] As a conventional structure of a spiral separation membrane element, it is known that a laminated body of a separation membrane, a supply-side channel material, and a permeate-side channel material is wound around a hollow water collection pipe with holes in one or more layers. structure (for example, refer to Patent Document 1). [0003] In this membrane element, the raw liquid is supplied from one end face, flows along the flow channel material on the supply side, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/10
CPCB01D63/10B01D2313/143B01D63/101B01D63/107B01D65/08B01D2323/12
Inventor 别府雅志地藏真一
Owner NITTO DENKO CORP
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