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.
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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