Separation membrane element

Patent metadata

Field	Value
Publication number	US-9724646-B2
Application number	US-201314410804-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	Jun 28, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A separation membrane element includes a water collecting pipe, a separation membrane main body having a feed-side face and a permeate-side face, a feed-side channel material and permeate-side channel materials. The separation membrane main body, the feed-side channel material and the permeate-side channel materials are spirally wound around the water collecting tube. A plurality of the permeate-side channel materials are discontinuously provided on the permeate-side face of the separation membrane main body, along a first direction that is a longitudinal direction of the water collecting pipe. The feed-side channel material has a thickness of from 0.15 to 0.5 mm.

First claim

The invention claimed is:

1. A separation membrane element comprising a water collecting pipe, a separation membrane main body having a feed-side face and a permeate-side face, a feed-side channel material, and permeate-side channel materials,
where the feed-side channel material has a plurality of fibers intersecting with each other, and an interval between intersections of the fibers in the first direction is from 1.5 to 8 mm, and the fibers are inclined a 20° to 60° or at −60° to −20° relative to the first direction,
wherein the separation membrane main body, the feed-side channel material and the permeate-side channel material are spirally wound around the water collecting pipe,
a plurality of the permeate-side channel materials are discontinuously provided on the permeate-side face of the separation membrane main body, along a first direction that is a longitudinal direction of the water collecting pipe, and
the feed-side channel material has a thickness of from 0.15 to 0.5 mm.

2. The separation membrane element according to claim 1 , wherein a length of the separation membrane main body in the first direction is from 100 to 350 mm.

3. The separation membrane element according to claim 1 , wherein a length of the separation membrane main body in a second direction perpendicular to the first direction is from 500 to 1,700 mm.

4. The separation membrane element according to claim 1 , wherein the permeate-side channel materials have a thickness of from 0.12 to 0.4 mm.

5. The separation membrane element according to claim 1 , wherein spacings between the permeate-side channel materials adjacent to each other along the first direction are from 0.2 to 1.5 mm.

6. The separation membrane element according to claim 1 , wherein a sum of the thickness of the feed-side channel material and the thickness of the permeate-side channel materials is from 0.4 to 0.75 mm.

7. The separation membrane element according to claim 1 , wherein a length of the separation membrane main body in the first direction is from 220 to 260 mm, a length of the separation membrane main body in a second direction perpendicular to the first direction is from 1,000 to 1,700 mm, and the number of pieces of the separation membrane main body is 1.

8. The separation membrane element according to claim 1 , wherein a length of the separation membrane main body in the first direction is from 220 to 260 mm, a length of the separation membrane main body in a second direction perpendicular to the first direction is from 500 to 1,000 mm, and the number of pieces of the separation membrane main body is 2.

9. The separation membrane element according to claim 1 , wherein a length of the separation membrane main body in the first direction is from 220 to 260 mm, a length of the separation membrane main body in a second direction perpendicular to the first direction is from 350 to 700 mm, and the number of pieces of the separation membrane main body is 3.

Assignees

• Toray Industries

Inventors

• Okamoto Yoshiki
• Koiwa Masakazu
• Yamada Hiroyuki
• Takagi Kentaro
• Hirozawa Hiroho
• Hamada Tsuyoshi
• Kimura Masahiro

Classifications

• B01D2313/146

  on the permeate side · CPC title

• B01D63/10 Primary

  Spiral-wound membrane modules · CPC title

• C02F1/44

  by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title

• C02F2103/08

  Seawater, e.g. for desalination · CPC title

• B01D63/107 Primary

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