Method of testing spiral wound modules by thermal imaging
First Claim
1. A method for testing a spiral wound module comprising a permeate collection tube extending between two opposing ends and including a plurality of openings along its length, and at least one membrane envelope wound about the permeate collection tube and forming two opposing scroll faces, wherein the membrane envelope is in fluid communication with the openings along the permeate collection tube;
- wherein the method comprises the steps of;
flowing a gas between the scroll face and permeate collection tube wherein the gas has a different temperature than the scroll face; and
detecting temperature differences on the scroll face of the spiral wound module.
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Abstract
Various methods for testing spiral wound modules by thermal imaging are described. In a preferred embodiment, the method(s) includes flowing a gas between a scroll face and permeate collection tube of a spiral wound module and detecting temperature differences on the scroll face. Temperature differentials on the scroll face may be captured as a thermal image. The location(s) of temperature differentials on the scroll face can be correlated to defects in the module. In preferred embodiments, the subject test methods are non-destructive and can be applied to spiral wound modules in either a dry or wet condition.
46 Citations
10 Claims
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1. A method for testing a spiral wound module comprising a permeate collection tube extending between two opposing ends and including a plurality of openings along its length, and at least one membrane envelope wound about the permeate collection tube and forming two opposing scroll faces, wherein the membrane envelope is in fluid communication with the openings along the permeate collection tube;
- wherein the method comprises the steps of;
flowing a gas between the scroll face and permeate collection tube wherein the gas has a different temperature than the scroll face; and detecting temperature differences on the scroll face of the spiral wound module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- wherein the method comprises the steps of;
Specification