Spiral wound filtration membrane cartridge with chevron seal
View Patent ↗A spiral wound filtration cartridge construction is provided which includes a cartridge positioned within a solid outer cylinder which, in turn is positioned within a solid outer cylinder which, in turn is positioned within a solid housing. Fluid flows within the space between the outer cylinder and housing is controlled by a ring and flexible chevron construction. The chevron construction includes outer peripheral holes, the sizes and number of which are set to determine by-pass flow.
1. A spiral wound apparatus installable into a solid housing to thereby enable filtering of a fluid to produce a permeate and a retentate, the spiral wound apparatus comprising:
a separation cartridge having at least one membrane, a plurality of porous feed screens and a pluraity of porous permeate screens spirally wound about a central tube having a hollow interior, said separation cartridge having an outer fluid permeate wrap;
a rigid nonporous solid outer tube housing said separation cartridge, said solid outer tube housable within a said solid housing such that said solid housing is spaced apart from said outer tube to form a space, said solid outer tube having a slot provided onto an outer surface of said solid outer tube at an inlet or an outlet for said tube; and
a chevron-shaped seal having holes, said chevron-shaped seal located when installed in said space between said solid housing and said outer tube and secured to said outer tube at said slot by a flexible ring in contact with said seal about the periphery of said seal, said ring-secured chevron-shaped seal capable of controlling the flow of fluid in said space by preventing flow thereinto other than through said holes;
wherein said solid outer tube further comprises a second slot provided on the outer surface of said tube, and wherein a portion of said flexible ring is positioned in said second slot.
2. The spiral wound apparatus of claim 1 , wherein said flexible ring comprises a flange portion shaped to fit in said second slot.
3. The spiral wound apparatus of claim 1 , wherein said seal is positioned at said inlet of said solid outer tube.
4. The spiral wound apparatus of claim 1 , wherein said seal is positioned at said outlet of said solid outer tube.
5. The spiral wound apparatus of claim 1 , wherein said second slot is a peripheral slot.