Spiral type separation membrane element
AssigneeNitto Denko Corporation
InventorsShinichi Chikura, Satoru Ishihara, Mitsuaki Hirokawa, Yasuhiro Uda
Life of this patent
Estimating the term…
Abstract
An object of the invention is to provide a spiral separation membrane element that can reduce the pressure loss of a feed-side channel and be much less vulnerable to the problem of inhibition or blockage of the flow in the feed-side channel. The spiral separation membrane element includes one or more separation membranes, one or more feed-side channel components, one or more permeation-side channel components, and a perforated hollow core tube around which the separation membranes, the feed-side channel components and the permeation-side channel components are wrapped, wherein the feed-side channel component is a net formed by fusion bonding.
Claims13
A spiral separation membrane element, comprising one or more separation membranes, one or more feed-side channel components, one or more permeation-side channel components, and a perforated hollow core tube around which the separation membranes, the feed-side channel components and the permeation-side channel components are wrapped, wherein the feed-side channel component is a net formed by fusion bonding.
A spiral separation membrane element, comprising one or more separation membranes, one or more feed-side channel components, one or more permeation-side channel components, and a perforated hollow core tube around which the separation membranes, the feed-side channel components and the permeation-side channel components are wrapped, wherein
- the feed-side channel component is a net formed by fusion bonding and has a three-layer structure comprising warp yarns arranged substantially parallel to the direction of feed fluid flow, oblique yarns arranged in a direction oblique to the direction of feed fluid flow, and reverse oblique yarns arranged in a direction that is reversely oblique to the direction of feed fluid flow with respect to the direction of the oblique yarns.
A method for manufacturing a feed-side channel component for use in a spiral separation membrane element by fusion bonding, comprising the steps of:
- extruding weft and warp yarns from a number of nozzle holes arranged at two circumferential portions of dies including inner and outer portions in an extruder while rotating the inner and outer nozzle holes in opposite directions, wherein the nozzle holes are arranged so that both nozzle holes do not overlap one another at the intersections of the weft and warp yarns;
- and
- fusing and bonding the extruded weft and warp yarns to each other to form intersections with timing of fusion bonding.
Dependencies are inferred from the claim text.