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US 2019/0160435 A1Published application
Separation membrane element
AssigneeToray Industries, Inc.
InventorsHiroho HIROZAWA, Kentarou TAKAGI, Yoshiki OKAMOTO, Satoshi KATO, Takeshi KONDA, Hiroyuki YAMADA, Tamotsu KITADE, Akshay GARG
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Abstract
The present invention relates to a separation membrane element for use in separation of ingredients contained in fluids such as liquid and gas. An object of the present invention is to provide a separation membrane element which, even when used in a high-recovery ratio operation, has high fresh-water production performance and high removal performance and is less apt to suffer scaling.
Claims14
A separation membrane element comprising:
- a plurality of separation membranes each having a raw-water-side face and a permeate-side face and forming a separation membrane leaf by being arranged so that the raw-water-side faces face each other;
- a permeate-side channel material provided between the permeate-side faces of the separation membranes to form a permeate-side channel;
- a raw-water-side channel material provided between the raw-water-side faces of the separation membranes to form a raw-water-side channel;
- and
- a water collection tube for collecting a permeate,
- wherein the separation membrane leaf has openings respectively in a peripheral part in a direction perpendicular to a longitudinal direction of the water collection tube, and in an end face in the longitudinal direction of the water collection tube, and
- the separation membrane leaf has a width W1 of 150 mm to 400 mm,
- the permeate-side channel material has a coefficient of variation in channel width of 0.00-0.10, and the separation membrane leaf has a ratio between the width W1 and a length L of the separation membrane leaf, L/W1, of 2.5 or larger.
5 more elements
A separation membrane element comprising:
- a plurality of separation membranes each having a raw-water-side face and a permeate-side face and forming a separation membrane leaf by being arranged so that the raw-water-side faces face each other;
- a permeate-side channel material provided between the permeate-side faces of the separation membranes to form a permeate-side channel;
- and
- a water collection tube for collecting a permeate,
- wherein the permeate-side channel material has a cross-section along a longitudinal direction of the water collection tube, the cross-section having a plurality of channels and having a cross-section area ratio of 0.4-0.75, and
- the separation membrane leaf comprises:
- a raw-water feed part which is an opening formed in a peripheral part of the separation membrane leaf in a direction perpendicular to the longitudinal direction of the water collection tube;
- and
- a concentrate discharge part which is an opening formed in an end-face side portion in the longitudinal direction of the water collection tube.
6 more elements
Dependencies are inferred from the claim text.