Membrane module protection
First Claim
1. A filtration system comprising:
- A membrane module comprising;
An upper header;
A lower header;
A plurality of hollow fiber membranes having upper ends potted in the upper header and lower ends potted in the lower header;
A liquid permeable cage at least partially surrounding the plurality of hollow fiber membranes; and
A liquid permeable screen in contact with and surrounding the cage;
An aeration cap coupled to the lower header of the membrane module;
A non-return valve in fluid communication with the aeration cap, the non-return valve configured to provide for flow of waste out of the module and to prevent any feed liquid from entering an area between the screen and the membranes; and
Wherein the membrane module includes a groove positioned at an upper end of the membrane module below the upper header, the screen being positioned below the groove and secured by a fastener, the groove and the fastener configured to prevent upward vertical movement of the screen.
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Accused Products
Abstract
In accordance with aspects and embodiments, a filtration system is provided comprising a membrane module comprising an upper header and a lower header, a plurality of hollow fiber membranes having an upper end potted in the upper header and a lower end potted in the lower head, a cage at least partially surrounding the plurality of hollow fiber membranes, and a screen in contact with and surrounding the cage, the filtration system further comprising an aeration cap coupled to the lower header of the membrane module. The screen may protect the hollow fiber membranes from damage from coarse contaminants contained in the feed liquid, may improve module integrity, and may improve the efficiency of the filtration system.
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Citations
19 Claims
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1. A filtration system comprising:
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A membrane module comprising; An upper header; A lower header; A plurality of hollow fiber membranes having upper ends potted in the upper header and lower ends potted in the lower header; A liquid permeable cage at least partially surrounding the plurality of hollow fiber membranes; and A liquid permeable screen in contact with and surrounding the cage; An aeration cap coupled to the lower header of the membrane module; A non-return valve in fluid communication with the aeration cap, the non-return valve configured to provide for flow of waste out of the module and to prevent any feed liquid from entering an area between the screen and the membranes; and Wherein the membrane module includes a groove positioned at an upper end of the membrane module below the upper header, the screen being positioned below the groove and secured by a fastener, the groove and the fastener configured to prevent upward vertical movement of the screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A filtration system comprising:
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a membrane module comprising; an upper header; a lower header; a plurality of hollow fiber membranes having upper ends potted in the upper header and lower ends potted in the lower header; a liquid-permeable cage at least partially surrounding the plurality of hollow fiber membranes; and a liquid-permeable screen in contact with and surrounding the cage; and an aeration cap coupled to the lower header of the membrane module, an opening being defined in the aeration cap; and a selectively operable screen coupled to the aeration cap, the selectively operable screen configured to open from a closed position covering at least a portion of the opening to an open position in which the selectively operable screen remains coupled to the aeration cap to allow flow of waste out of the membrane module. - View Dependent Claims (14, 15, 17, 18, 19)
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16. The filtration system of claimed 13, wherein the screen is self-securing around the cage without use of securing devices.
Specification