Title:
スパイラル型分離膜エレメント
Document Type and Number:
Japanese Patent JP4650921
Kind Code:
B2
Abstract:
A spiral separation membrane element effective in reducing the pressure loss around core tube perforated parts, which is problematic especially in low-pressure operations. The spiral separation membrane element comprises a perforated cored tube 5 and, spirally wound therearound, separation membranes 1, feed-side passage materials 2, and permeation-side passage materials 4, the separation membranes 1 and the passage materials 2 and 4 being wound around the cored tube 5 so that the feed-side passage materials 2 and the permeation-side passage materials 4 are disposed respectively on the feed side and permeation side of the separation membranes 1 and that a permeation-side passage material 10 which is the same as or different from the permeation-side passage materials 4 is interposed at the periphery of the perforated cored tube 5, wherein the effective perforated-part area as calculated by multiplying the total area of the perforated parts in the core tube 5 by the percentage of openings of one layer of the permeation-side passage material surrounding the core tube 5 is at least 1.0 time the inner cross-sectional area of the core tube 5.
Inventors:
Hirokawa Mitsuaki
Ando Masaaki
Shinichi Jizo
Satoshi Ishihara
Ando Masaaki
Shinichi Jizo
Satoshi Ishihara
Application Number:
JP2003099954A
Publication Date:
March 16, 2011
Filing Date:
April 03, 2003
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
B01D61/08; B01D63/10; B01D61/18; B01D63/00; B01D67/00; B01D69/10
Domestic Patent References:
| JP200218248A | ||||
| JP9155167A | ||||
| JP11267406A | ||||
| JP11137974A | ||||
| JP2000167358A |
Attorney, Agent or Firm:
Patent Business Corporation Unias International Patent Office