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US 8,571,296 B2Granted
Method of testing the integrity of spiral wound modules
AssigneeDow Global Technologies LLC
InventorSteven D. Jons
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Abstract
Methods for testing the integrity of spiral wound modules including the introduction of pressurized gas within a sealed permeate collection tube and the detection of gas exiting at least one of the scroll faces of the module. The location(s) of gas exiting 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 modules in either a dry or wet condition.
Claims10
A method for testing the integrity of a spiral wound module conducted in a gaseous environment, wherein the module comprises:
- 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:
- sealing the opposing ends the permeate collection tube from the gaseous environment,
- introducing a pressurized test gas into the permeate collection tube, and
- detecting test gas exiting from at least one scroll face of the spiral wound module.
2 more elements
Dependencies are inferred from the claim text.