Separation membrane element

Patent metadata

Field	Value
Publication number	US-11123691-B2
Application number	US-201816616579-A
Country	US
Kind code	B2
Filing date	Apr 26, 2018
Priority date	May 30, 2017
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

The present invention addresses the problem of providing a separation membrane element with which it is possible to stabilize the separation removal performance when a separation membrane element is operated. The present invention is a separation membrane element provided at least with a collecting pipe, a separation membrane, a feed-side channel material, and a permeation-side channel material, wherein: the feed-side channel material is configured from a fibrous column X configured from a plurality of fibrous materials A arranged in one direction and a fibrous column Y configured from a plurality of fibrous materials B arranged in a different direction to the fibrous column X; the fibrous materials A intersect the fibrous materials B to form intersections; and the fibrous materials A and/or the fibrous materials B have a small-diameter part and a large-diameter part between adjacent intersections in a section plane parallel to the respective fibrous column.

First claim

The invention claimed is:

1. A separation membrane element comprising at least a water collection tube, a separation membrane, a feed-side channel material, and a permeate-side channel material, wherein
the feed-side channel material is configured of a fibrous row X configured of a plurality of fiber-form objects A arranged in one direction and a fibrous row Y configured of a plurality of fiber-form objects B arranged in a direction different from the direction for the fibrous row X,
the fiber-form objects A sterically intersect the fiber-form objects B to form intersections,
the fiber-form objects A and/or the fiber-form objects B have a small-diameter part formed by necking and a large-diameter part between adjacent intersections in a section thereof parallel to the respective fiber-form object wherein the large-diameter part has been disposed only at one end of the small-diameter part between adjacent intersections, and
the feed-side channel material has a proportion of a length of the small-diameter part to an interval between the intersections being 0.25 or more and 0.80 or less.

2. The separation membrane element according to claim 1 , wherein a proportion of an average diameter of the small-diameter part to an average diameter of the large-diameter part is 0.17 or more and 0.78 or less.

3. The separation membrane element according to claim 1 , wherein the small-diameter part has been disposed in a center position with respect to the large-diameter part in the thickness direction of the feed-side channel material.

4. The separation membrane element according to claim 1 , wherein the small-diameter part has a tensile modulus of 200 MPa or more and 1,000 MPa or less.

Assignees

• Toray Industries

Inventors

• Hirozawa Hiroho
• Nishioka Takuji
• Kitamura Yoshiyuki
• Suzuki Yutaro
• ONO Fuka

Classifications

• B01D61/00

  Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor (separation of gases or vapours by diffusion B01D53/22) · CPC title

• B01D63/107 Primary

  Specific properties of the central tube or the permeate channel · CPC title

• B01D65/08

  Prevention of membrane fouling or of concentration polarisation · CPC title

• B01D2313/143

  on the feed side · CPC title

• B01D61/08

  Apparatus therefor · CPC title