Corrugated spiral membrane module
OwnerJatal D. Mannapperumainventor
Life of this patent
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Abstract
An improved spiral membrane and module for cross flow filtration where several of the membrane envelopes are wavelike or corrugated in structure to allow unobstructed flow of the feed to reduce the feed path fouling when used to filter feed containing particulate matter.
Claims4
In a cross flow membrane filtration module for separating solids from liquids including a central pipe for carrying the filtered liquid and two membrane envelopes spirally wound around the central tube, where each membrane envelope comprises two permeable membranes sandwiching a third porous backing layer, where three sides of the membrane envelope are sealed and the fourth side is connected to the central tube providing a liquid connection between the porous backing layer and the said central tube, where one of the two membrane envelopes is formed into a wave like corrugated pattern, where the corrugations form a multitude of axial channels when spirally wound which provide the flow path for the feed liquid wherein:
- the corrugated membrane envelope is formed by placing a flat permeate spacer between two flat membranes with parallel glue lines having been drawn therebetween, pressing such structure in a corrugated mold, and allowing such glue to cure and provide structural strength to make the corrugations permanent.
Dependencies are inferred from the claim text.