Spiral separation membrane element

Patent metadata

Field	Value
Publication number	US-9504963-B2
Application number	US-201113976317-A
Country	US
Kind code	B2
Filing date	Dec 22, 2011
Priority date	Dec 27, 2010
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A spiral separation membrane element ( 1 A) includes: a wound body ( 3 ) including a separation membrane; a core tube ( 2 ) that penetrates the wound body ( 3 ) along the central axis of the wound body ( 3 ); and a joining portion ( 4 ) that joins the wound body ( 3 ) to the core tube ( 2 ) at at least one end face ( 3 a ) of the wound body ( 3 ). The joining portion ( 4 ) has a holding portion ( 41 ) disposed inwardly of the end face ( 3 a ) of the wound body ( 3 ) and an extending portion ( 42 ) formed integrally with the holding portion ( 41 ). The spiral separation membrane element ( 1 A) further includes a restraining member ( 5 A) that secures the extending portion ( 42 ) to the core tube ( 2 ).

First claim

The invention claim is:

1. A spiral separation membrane element comprising:
a wound body including a separation membrane;
a core tube that penetrates the wound body along a central axis of the wound body;
a joining portion that joins the wound body to the core tube at at least one end face of the wound body, the joining portion including: a holding portion disposed inwardly of the end face of the wound body; and an extending portion formed integrally with the holding portion and extending from the holding portion in a direction the end face of the wound body faces, without being in contact with the end face of the wound body outwardly from the holding portion, along an outer peripheral surface of the core tube; and
a restraining member that secures the extending portion to the core tube.

2. The spiral separation membrane element according to claim 1 , wherein the restraining member is a clamping member capable of clamping the extending portion onto the core tube.

3. The spiral separation membrane element according to claim 1 , wherein the restraining member is a tubular member that is put on the core tube in close contact with the end face of the wound body, and the extending portion fills a gap between the tubular member and the core tube.

4. The spiral separation membrane element according claim 1 , wherein the core tube is made of metal.

5. The spiral separation membrane element according to claim 1 , wherein the joining portion is made from a thermosetting resin adhesive.

6. The spiral separation membrane element according to claim 1 , wherein the wound body includes an envelope-like membrane leaf and a feed-side carrier material that are spirally wound together around the core tube, the membrane leaf being composed of the separation membranes and a permeate-side carrier material sandwiched between the separation membranes.

7. The spiral separation membrane element according to claim 6 , wherein the separation membrane includes a skin layer that faces the feed-side carrier material, a support layer that supports the skin layer, and a nonwoven fabric laminated on the support layer, and
the skin layer is a non-porous and homogeneous membrane made of a fluorine-containing resin or a cellulose-based resin.

8. The spiral separation membrane element according to claim 1 , wherein the Restraining member is spaced from the end face of the wound body in the direction the end face of the wound body faces.

Assignees

• Chikura Shinichi
• Hamada Toshimitsu
• Uda Yasuhiro
• Yoshida Kazuhito
• Nitto Denko Corp

Inventors

• Chikura Shinichi
• Hamada Toshimitsu
• Uda Yasuhiro
• Yoshida Kazuhito

Classifications

• B01D65/00

  Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes · CPC title

• B01D2313/00

  Details relating to membrane modules or apparatus · CPC title

• B01D2313/02

  Specific tightening or locking mechanisms · CPC title

• B01D2313/12

  Specific discharge elements · CPC title

• B01D63/10 Primary

  Spiral-wound membrane modules · CPC title