Spiral-wound acid gas separation membrane element, acid gas separation membrane module, and acid gas separation apparatus

Patent metadata

Field	Value
Publication number	US-2018178166-A1
Application number	US-201615577083-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	May 29, 2015
Publication date	Jun 28, 2018
Grant date	—

Abstract

A spiral-wound acid gas separation membrane element ( 1 ) includes a wound body which includes a laminate and a perforated core ( 5 ), the laminate being wound around the perforated core tube ( 5 ) and including: a separation membrane ( 2 ), a feed-side channel component ( 3 ), and an element constituent layer (e.g., permeate-side channel component ( 4 )). The separation membrane ( 2 ) is provided with a sealing section ( 25 ) present at both widthwise ends of the separation membrane ( 2 ). The sealing section ( 25 ) is sealed with an adhesive. This makes it possible not only to separate acid gas from mixed gas more efficiently as compared to a conventional spiral-wound acid gas separation membrane element but also to save energy.

First claim

1 . A spiral-wound acid gas separation membrane element comprising:
a wound body including:
a separation membrane;
a feed-side channel component;
a permeate-side channel component;
a sealing section; and
a perforated core tube,
the separation membrane, the feed-side channel component, and the permeate-side channel component being in a laminated state and wound around the perforated core tube, the separation membrane including:
a separate functional layer including:
an acid gas carrier that reversibly reacts with acid gas; and
an acid gas separation membrane resin; and

a support layer including a porous membrane,
the permeate-side channel component being greater at least in an across-the-width direction of the permeate-side channel component than the separation membrane, and the sealing section being provided at each of both widthwise ends of the separation membrane, for filling in a gap formed between the permeate-side channel component and the separation membrane.

2 . The spiral-wound acid gas separation membrane element according to claim 1 , further comprising at least one selected from the group consisting of:
at least one protective layer provided between the separation membrane and the feed-side channel component; and at least one reinforcement porous membrane provided as a layer on a permeate side of the separation membrane.

3 . The spiral-wound acid gas separation membrane element according to claim 1 , wherein
the sealing section is an adhesive layer.

4 . The spiral-wound acid gas separation membrane element according to claim 3 , wherein
the adhesive layer contains an epoxy adhesive resin.

5 . The spiral-wound acid gas separation membrane element according to claim 1 , wherein
the support layer is a porous membrane made of a fluorine-containing resin.

6 . The spiral-wound acid gas separation membrane element according to claim 1 , further comprising another sealing section into which an adhesive has been caused to penetrate, the another sealing section being provided in both widthwise-end continuous areas of an element constituent layer, the widthwise-end continuous areas each extending from a corresponding widthwise end of the element constituent layer and reaching a corresponding one of imaginary lines obtained by extending in a thickness direction widthwise ends of the separation membrane,
the element constituent layer including at least one selected from the group consisting of the permeate-side channel component, at least one protective layer provided between the separation membrane and the feed-side channel component, and at least one reinforcement porous membrane provided as a layer on a permeate side of the separation membrane.

7 . The spiral-wound acid gas separation membrane element according to claim 6 , wherein
in the another sealing section, the adhesive has been caused to penetrate into inner areas in a width direction beyond the imaginary lines obtained by extending in a thickness direction the widthwise ends of the separation membrane.

8 . The spiral-wound acid gas separation membrane element according to claim 1 , wherein the protective layer has widthwise ends treated with a hydrophilic treatment agent.

9 . The spiral-wound acid gas separation membrane element according to claim 1 , further comprising still another sealing section into which an adhesive has been caused to penetrate, in widthwise-end areas of the support layer.

10 . The spiral-wound acid gas separation membrane element according to claim 9 , wherein
the still another sealing section is treated with a hydrophilic treatment agent.

11 . The spiral-wound acid gas separation membrane element according to claim 8 , wherein
the hydrophilic treatment agent is a surface active agent.

12 . An acid gas separation membrane module comprising:
at least one spiral-wound acid gas separation membrane element according to claim 1 ; and a housing, the at least one spiral-wound acid gas separation membrane element being provided in the housing.

13 . An acid gas separation apparatus comprising at least one acid gas separation membrane module according to claim 12 .

14 . A sealing method used for a spiral-wound acid gas separation membrane element including a wound body,
the wound body including:
a separation membrane;
a feed-side channel component;
a permeate-side channel component;
a sealing section; and
a perforated core tube,
the separation membrane, the feed-side channel component, and the permeate-side channel component being in a laminated state and wound around the perforated core tube, the separation membrane including:
a separate functional layer including:
an acid gas carrier that reversibly reacts with acid gas; and
an acid gas separation membrane resin; and

a support layer including a porous membrane,
the sealing method comprising the step of: applying an adhesive to both widthwise ends of the separation membrane so as to fill in a gap formed between the permeate-side channel component and the separation membrane, the permeate-side channel component being greater at least in an across-the-width direction of the permeate-side channel component than the separation membrane.

15 . The sealing method as set forth in claim 14 , wherein
the spiral-wound acid gas separation membrane element further includes at least one selected from the group consisting of:
at least one protective layer provided between the separation membrane and the feed-side channel component; and
at least one reinforcement porous membrane provided as a layer on a permeate side of the separation membrane.

16 . The sealing method according to claim 14 , further comprising the step of applying an adhesive such that the adhesive penetrates into both widthwise-end continuous areas of an element constituent layer, the widthwise-end continuous areas each extending from a corresponding widthwise end of the element constituent layer and reaching a corresponding one of imaginary lines obtained by extending in a thickness direction widthwise ends of the separation membrane,
the element constituent layer including at least one selected from the group consisting of the permeate-side channel component, at least one protective layer provided between the separation membrane and the feed-side channel component, and at least one reinforcement porous membrane provided as a layer on a permeate side of the separation membrane.

17 . The sealing method according to claim 14 , further comprising the step of applying an adhesive to both widthwise ends of the support layer.

18 . The sealing method according to claim 14 , further comprising the step of treating, with a hydrophilic treatment agent, widthwise ends of at least one of the protective layer and the support layer, in advance of application of an adhesive.

19 . The sealing method according to claim 18 , wherein
the hydrophilic treatment agent is a surface active agent.

20 . The spiral-wound acid gas separation membrane element according to claim 10 , wherein
the hydrophilic treatment agent is a surface active agent.

Assignees

• Sumitomo Chemical Co

Inventors

• Okubo Yoshihito
• Shudo Atsushi
• Ota Yudai
• Kasahara Shohei

Classifications

• B01D2323/02

  Hydrophilization · CPC title

• B01D71/32

  containing fluorine atoms · CPC title

• B01D2313/23

  Specific membrane protectors, e.g. sleeves or screens · CPC title

• B01D53/228

  characterised by specific membranes · CPC title

• B01D2313/086

  Meandering flow path over the membrane · CPC title