Gas scouring apparatus for immersed membranes
First Claim
Patent Images
1. A gas scouring apparatus comprising:
- a housing defining a chamber;
a bell tube having a lower end and an open upper end and including a wall that is tapered between the lower end and the open upper end, the open upper end disposed within the chamber and having a greater cross sectional area than the lower end;
a riser tube including a wall, a lower portion including an open lower end, and an upper portion including a flared open upper end, the lower portion disposed within the bell tube; and
a conduit defined between the wall of the bell tube and the wall of the riser tube and in fluid communication with an internal volume of the riser tube.
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Accused Products
Abstract
Disclosed herein are aspects and embodiments of an apparatus for providing gas slugs in a liquid. In one example, the apparatus comprises a housing defining a chamber, a bell tube including a wall and an open upper end disposed within the chamber, a riser tube including a wall, an open lower end, and a flared open upper end disposed within the bell tube, and a conduit defined between the wall of the bell tube and the wall of the riser tube and in fluid communication with an internal volume of the riser tube.
587 Citations
22 Claims
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1. A gas scouring apparatus comprising:
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a housing defining a chamber; a bell tube having a lower end and an open upper end and including a wall that is tapered between the lower end and the open upper end, the open upper end disposed within the chamber and having a greater cross sectional area than the lower end; a riser tube including a wall, a lower portion including an open lower end, and an upper portion including a flared open upper end, the lower portion disposed within the bell tube; and a conduit defined between the wall of the bell tube and the wall of the riser tube and in fluid communication with an internal volume of the riser tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An assembly comprising:
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a membrane module including a filtration membrane secured in a membrane anchor; and a gas scouring apparatus positioned below the membrane anchor, the gas scouring apparatus including; a housing defining a chamber; a bell tube having a lower end and an upper end and including a wall that is tapered between the lower end and the open upper end, the open upper end disposed within the chamber and having a greater cross sectional area than the lower end; a riser tube including a wall, a lower portion including an open lower end, and an upper portion including a flared open upper end, the lower portion disposed within the bell tube; and a conduit defined between the wall of the bell tube and the wall of the riser tube and in fluid communication with an internal volume of the riser tube. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A method comprising:
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immersing a filtration assembly in a liquid to be filtered, the assembly including; a membrane module including a filtration membrane secured in a membrane anchor; and a gas scouring apparatus positioned below the membrane anchor, the gas scouring apparatus including; a housing defining a chamber; a bell tube having a lower end and an open upper end and including a wall that is tapered between the lower end and the open upper end, the open upper end disposed within the chamber and having a greater cross sectional area than the lower end; a riser tube including a wall, a lower portion including an open lower end, and an upper portion including a flared open upper end, the lower portion of the riser tube disposed within the bell tube; and a conduit defined between the wall of the bell tube and the wall of the riser tube and in fluid communication with an internal volume of the riser tube; and applying a gas at a substantially constant rate into the chamber.
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Specification