EP-4736993-A1 - SEPARATION MEMBRANE ELEMENT AND SEPARATION DEVICE

Abstract

An object is to provide a plate-and-frame-type separation membrane element in which, even when a gas is fed, a feed-side sealing part is unlikely to peel off. The above object is achieved by a plate-and-frame-type separation membrane element which has a sealing part between a feed-side spacer member and the separation membrane and in which the amount of compressive deformation of the permeate-side spacer member, as measured by JIS K 7181, is not more than 0.40 mm, and the adhesion strength of the sealing part, as measured by JIS K 6854, is not less than 1.0 N.

Inventors

• TASAKI, TSUTOMU

Assignees

• Sumitomo Chemical Company, Limited

Dates

Publication Date

20260506

Application Date

20240607

Claims (7)

1. A plate-and-frame-type separation membrane element comprising: a container; and a separation membrane having a region disposed in a flat-membrane form in the container, wherein: the separation membrane has a separation functional layer that selectively separates a specific fluid component contained in a raw material fluid; the container houses a laminate that at least has two permeate-side spacer members, and the separation membrane and a feed-side spacer member which are disposed between the two permeate-side spacer members, wherein a permeate fluid, which has permeated through the separation membrane, flows through the two permeate-side spacer members, and the raw material fluid flows through the feed-side spacer member; the separation membrane element has a feed-side sealing part between the feed-side spacer member and the separation membrane; the permeate-side spacer member has an amount of compressive deformation, as measured by JIS K 7181, of not more than 0.40 mm; and the sealing part has a peel strength, as measured by JIS K 6854, of not less than 1.0 N.
2. The plate-and-frame-type separation membrane element according to claim 1, wherein the permeate-side spacer members have a mesh number of not less than 18, and when the permeate-side spacer members each have a multilayer structure which has not less than two layers, the not less than two layers have the same mesh number.
3. The plate-and-frame-type separation membrane element according to claim 1, wherein the permeate-side spacer members have a mesh number of not less than 50.
4. The plate-and-frame-type separation membrane element according to any one of claims 1 to 3, wherein the separation membrane has a thickness from 10 µm to 600 µm
5. The plate-and-frame-type separation membrane element according to any one of claims 1 to 3, wherein the raw material fluid is a gas.
6. The plate-and-frame-type separation membrane element according to any one of claims 1 to 3, wherein the specific fluid component is an acid gas.
7. A separation apparatus comprising: the plate-and-frame-type separation membrane element according to any one of claims 1 to 3; a first feed part and a first discharge part that are in communication with the feed-side spacer member; and a second discharge part that is in communication with the permeate-side spacer members.

Description

Technical Field The present invention relates to a separation membrane element and a separation apparatus. Background Art A plate-and-frame-type separation membrane element in which flat membranes are stacked one on top of another is known as a separation membrane for separating a specific fluid component from a liquid or gas raw material fluid (e.g., Patent Literatures 1 to 3). In recent years, the performance of separation membranes has improved, and it has become possible to provide thinner separation membranes. Such thin separation membranes can be used for the removal of carbon dioxide or the like contained in a gas such as an exhaust gas. In the plate-and-frame-type separation membrane element, it is possible to use thin separation membranes that are difficult to use in spiral-wound-type separation membrane elements. Citation List [Patent Literature] [Patent Literature 1] Japanese Patent Application Publication Tokukai No. 2017-000965[Patent Literature 2] Japanese Patent Application Publication Tokukai No. 2017-000964[Patent Literature 3] U.S. Patent Application Publication No. 2019/0065091 Summary of Invention Technical Problem When a gas is fed to the plate-and-frame-type separation membrane element as disclosed in Patent Literatures 1 to 3 above, the membrane is pressed into the permeate side, and the sealing part on the feed side can peel off. The present invention has been made in view of the above problem, and an object thereof is to provide a plate-and-frame-type separation membrane element in which, even when a gas is fed, the sealing part on the feed side is unlikely to peel off (and, more preferably, does not peel off). Solution to Problem As a result of studies conducted to solve the above problem, the present inventors have found that the above problem can be solved by a separation membrane element in which the amount of compressive deformation of a permeate-side spacer member is equal to or smaller than a predetermined value and the peel strength of a feed-side sealing part is equal to or greater than a predetermined value, and have thus completed the present invention. The present invention encompasses the following. <1> A plate-and-frame-type separation membrane element including: a container; and a separation membrane having a region disposed in a flat-membrane form in the container, in which the separation membrane has a separation functional layer that selectively separates a specific fluid component contained in a raw material fluid, the container houses a laminate that at least has two permeate-side spacer members, and the separation membrane and a feed-side spacer member which are disposed between the two permeate-side spacer members, in which a permeate fluid, which has permeated through the separation membrane, flows through the two permeate-side spacer members, and the raw material fluid flows through the feed-side spacer member, the separation membrane element has a feed-side sealing part between the feed-side spacer member and the separation membrane, the permeate-side spacer member has an amount of compressive deformation of not more than 0.40 mm, as measured by JIS K 7181, and the sealing part has a peel strength, as measured by JIS K 6854, of not less than 1.0 N.<2> The plate-and-frame-type separation membrane element described in <1>, in which the permeate-side spacer members have a mesh number of not less than 18, and when the permeate-side spacer members each have a multilayer structure which has not less than two layers, the not less than two layers have the same mesh number.<3> The plate-and-frame-type separation membrane element described in <1>, in which the permeate-side spacer members have a mesh number of not less than 50.<4> The plate-and-frame-type separation membrane element described in any one of <1> to <3>, in which the separation membrane has a thickness from 10 µm to 600 µm.<5> The plate-and-frame-type separation membrane element described in any one of <1> to <4>, in which the raw material fluid is a gas.<6> The plate-and-frame-type separation membrane element described in any one of <1> to <5>, in which the specific fluid component is an acid gas.<7> A separation apparatus including: the plate-and-frame-type separation membrane element described in any one of <1> to <6>; a first feed part and a first discharge part that are in communication with the feed-side spacer member; and a second discharge part that is in communication with the permeate-side spacer members. Advantageous Effects of Invention With an aspect of the present invention, it is possible to provide a plate-and-frame-type separation membrane element in which, even when a gas is fed, a sealing part on the feed side is unlikely to peel off (and, more preferably, does not peel off). Brief Description of Drawings Fig. 1 is a perspective view schematically illustrating a separation membrane element in accordance with an embodiment of the present invention.Fig. 2 is an exploded perspective view