Title:
スパイラル型膜エレメント
Document Type and Number:
Japanese Patent JP7089352
Kind Code:
B2
Abstract:
Provided is a spiral membrane element that has a restricted outer diameter and is capable of being decreased in operation energy therefor. The element is a spiral membrane element including plural membrane leaves in each of which a permeation-side flow-channel member is interposed between opposed separation membranes; a supply-side flow-channel member interposed between any two of the membrane leaves; a perforated central pipe on which the membrane leaves and the supply-side flow-channel member are wound; and a sealing part that prevents a supply-side flow-channel member from being mixed with a permeation-side flow-channel member. This element has an efficiency index E of 0.005 to 0.10, the index being calculated in accordance with an expression described below, and the thickness of the supply-side flow-channel member is from 10 to 110 mil. Efficiency index: E = 0.0024 x X - 0.2373 + (Y/(Dx L)) wherein X is a thickness [mil] of the supply-side flow-channel member, Y is an effective membrane area [ft] of the separation membranes, D is an outer diameter [inch] of the membrane element, and L is a length [inch] of the membrane element.
Inventors:
Miyoko Nishi
Yasuhiro Uda
Yasuhiro Uda
Application Number:
JP2017175464A
Publication Date:
June 22, 2022
Filing Date:
September 13, 2017
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
B01D63/10; B01D63/00; B01D69/10; B01D69/12; D04B21/00
Domestic Patent References:
| JP2006247629A | ||||
| JP2006507117A | ||||
| JP2016064363A | ||||
| JP2013158713A | ||||
| JP2000051668A | ||||
| JP9276671A | ||||
| JP2012040546A | ||||
| JP2000288542A |
Foreign References:
| WO2012133153A1 | ||||
| WO2014208602A1 | ||||
| WO2017115653A1 | ||||
| WO2015115575A1 | ||||
| WO2011049231A1 |
Attorney, Agent or Firm:
Patent Business Corporation Unias International Patent Office