Patent Number: 6,168,648

Title: Spiral wound type membrane module, spiral wound type membrane element and running method thereof

Abstract: A spiral wound type membrane element is formed by superposing gas-liquid contact membranes on both surfaces of a first fluid passage forming member, superposing a second fluid passage forming member on the surface of one of the gas-liquid contact membranes and spirally winding the gas-liquid contact membranes around a second fluid supply pipe along with the first fluid passage forming member and the second fluid passage forming member. A side portion on the inner peripheral side and a side portion on the outer peripheral side of a first fluid passage formed by the first fluid passage forming member between the gas-liquid contact membranes are sealed. Both end portions of a second fluid passage formed by the second fluid passage forming member between the gas-liquid contact membranes are sealed. The spiral wound type membrane element is stored inside a cylindrical container. The gas-liquid contact membranes are formed by PTFE (polytetrafluoroethylene) porous membranes having hydrophobicity. First fluid is supplied from a first fluid inlet of the cylindrical container, passes through the first fluid passage of the spiral wound type membrane element and is taken outward from a first fluid outlet of the cylindrical container. Second fluid is supplied into the second fluid supply pipe from a second fluid inlet of the cylindrical container, passes through the second fluid passage of the spiral wound type membrane element and is taken outward from a second fluid outlet of the cylindrical container.

Inventors: Ootani; Akira (Osaka, JP), Hayama; Hideki (Osaka, JP), Kondou; Yoshihiko (Osaka, JP)

Assignee: Nitto Denko Corporation

International Classification: B01D 61/00 (20060101); B01D 63/10 (20060101); B01D 19/00 (20060101); B01D 053/22 ()

Expiration Date: 01/02/2018