SEPARATION MEMBRANE ELEMENT

WIPO Patent Application WO/2023/048052

A1

The present invention provides a separation membrane element which can suppress fouling even in a long-term operation while suppressing pressure loss in a supply-side flow path and concentration polarization. In a separation membrane element according to the present invention: a separation membrane, a supply-side flow path material, and a permeation-side flow path material are wound around a water collecting pipe; the supply-side flow path material has a net shape in which a plurality of fibrous rows X arranged in one direction and composed of a fibrous material A and a plurality of fibrous rows Y arranged in a direction different from the fibrous rows X and composed of a fibrous material B three-dimensionally intersect with each other to form intersection parts; the intersection parts are composed of fibers having a larger diameter than portions other than the intersection parts; and when one among the intersection parts is projected from each direction of (1) a direction perpendicular to the plane on which the fibrous rows X and the fibrous rows Y are arranged, and (2) a direction perpendicular to a plane which is perpendicular to the plane on which the fibrous rows X and the fibrous rows Y are arranged, and is parallel to the longest diagonal line among quadrangular diagonal lines composed of the intersection parts, the ratios of the area of a projection drawing to the areas of convex hulls in the projection drawing are all at least 90%.

KONDA TAKESHI (JP)
HANADA SHIGEHISA (JP)
TAKAGI KENTARO (JP)
TANIGUCHI SHU (JP)

PCT/JP2022/034490

March 30, 2023

September 14, 2022

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TORAY INDUSTRIES (JP)

B01D63/10

WO2021039846A1

2021-03-04

JP2018523566A

2018-08-23

EIKOH PATENT FIRM, P.C. (JP)

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