Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1987-02-10
1988-08-16
Chiesa, Richard L.
Gas and liquid contact apparatus
Fluid distribution
Valved
137854, 2102212, 239145, 261122, B01F 304
Patent
active
047643145
ABSTRACT:
A diffuser for introducing gas in bubbles into liquid held in an aeration tank comprising a body member having a backing surface and passaging extending from a gas inlet to an outlet at the backing surface, and a flexible, gas permeable membrane covering the backing surface and secured at its periphery to the body member in sealing relationship thereto. The membrane is adapted to distend and move away from the backing surface upon delivery of gas under pressure to diffuser, with the gas flowing through the distended portion of the membrane and into the liquid in the form of relatively small gas bubbles, and adapted to collapse into engagement with the backing surface when gas under pressure is not delivered to the diffuser. A check valve comprising a movable valve member on the membrane and a valve seat on the backing surface enables flow of gas into the space between backing surface and the membrane, and blocks flow of liquid into the passaging in the body member.
REFERENCES:
patent: 1642051 (1927-09-01), Wall
patent: 2718275 (1955-09-01), Banks
patent: 3396950 (1968-08-01), Wood
patent: 3441216 (1969-04-01), Good
patent: 3977606 (1976-08-01), Wyss
patent: 3997634 (1976-12-01), Downs
patent: 4007240 (1977-02-01), Gosden
patent: 4046845 (1977-09-01), Veeder
patent: 4243616 (1981-01-01), Wyss
Chiesa Richard L.
Rowold Carl
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