US 9,808,767 B2
Separation membrane element
Shunsuke Tabayashi, Ehime (JP); Hiroho Hirozawa, Otsu (JP); Kentaro Takagi, Otsu (JP); Yoshie Marutani, Otsu (JP); Yoshiki Okamoto, Otsu (JP); Hiroyuki Yamada, Otsu (JP); Shuji Furuno, Otsu (JP); Takao Sasaki, Otsu (JP); and Masahiro Kimura, Otsu (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 15/32,755
Filed by TORAY INDUSTRIES, INC., Tokyo (JP)
PCT Filed Oct. 31, 2014, PCT No. PCT/JP2014/079110
§ 371(c)(1), (2) Date Apr. 28, 2016,
PCT Pub. No. WO2015/064752, PCT Pub. Date May 7, 2015.
Claims priority of application No. 2013-226340 (JP), filed on Oct. 31, 2013; application No. 2013-268548 (JP), filed on Dec. 26, 2013; and application No. 2014-131409 (JP), filed on Jun. 26, 2014.
Prior Publication US 2016/0303514 A1, Oct. 20, 2016
Int. Cl. B01D 63/10 (2006.01); C02F 1/44 (2006.01); C02F 103/08 (2006.01)
CPC B01D 63/103 (2013.01) [C02F 1/44 (2013.01); B01D 2313/146 (2013.01); C02F 2103/08 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A separation membrane element comprising: a water collection tube; and a plurality of separation membrane leaves stacked on each other and wound around the water collection tube,
wherein each of the separation membrane leaves comprises one or more separation membranes each having a feed-side face and a permeate-side face and is configured so that the feed-side faces face each other,
a sheet having a plurality of projections fixed thereto is provided between the permeate-side faces of the separation membrane leaves stacked on each other, wherein the plurality of projections are impregnated into the sheet,
regarding a height of the projections, a ratio of the maximum height to the minimum height of one projection in the cross section in a lengthwise direction of the separation membrane is from 1.10 to 1.50, and a variation coefficient of the height of the projections in one and the same plane is from 0.02 to 0.15, and
an impregnation ratio of the projections into the sheet is from 10% to 100%.