Method for sealing spiral wound filtration modules

Details Method for sealing spiral wound filtration modules Method for sealing spiral wound filtration modules

1999-02-11

2000-05-30

Drodge, Joseph W.

Liquid purification or separation

Casing divided by membrane into sections having inlet

Coiled membrane

55520, 96 4, 156 74, 156187, 156285, 21032161, 21032185, 2104971, B01D 6310, B32B 3116

Patent

active

060687711

ABSTRACT:
A method for preparing a spiral wound filtration module is provided. The module has a central permeate carrier tube. The method includes winding at least one filtration leaf about the permeate carrier tube. The filtration leaf includes a first membrane sheet, a permeate carrier sheet, and a second membrane sheet. The winding step creates an end face extending radially outwardly from the permeate tube on each end thereof. After winding, the filtration module is maintained in a wound state. An adhesive is then supplied to each end face and a vacuum is applied through each of the permeate tube. While the vacuum is applied, the permeate tube and filtration leaf assembly are spun in a centrifuge until the adhesive has solidified. After spinning, each end face of the module is severed at a distance between the level of adhesive along the feed spacer screen and the level of adhesive along the permeate carrier sheet.

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