Gas and liquid contact apparatus – Contact devices – Injector type
Patent
1979-03-30
1980-04-15
Chiesa, Richard L.
Gas and liquid contact apparatus
Contact devices
Injector type
210220, 261123, 261124, B01F 304
Patent
active
041983599
ABSTRACT:
A gasification device having an overall density greater than that of water is suspended by chains over six foot down in a body of waste water about nine foot deep in a treatment vessel of a waste water treatment plant. The device is about one and a half foot tall and one and a half foot in diameter. The device is ring-like to define a generally annular enclosed chamber for receiving, through an inlet, gas to be introduced into the waste water. The longitudinal axis passing through the plane of said ring is vertically oriented. The central opening of said ring defines a passageway for induced upward flow of the water. A constriction about six inches long and six inches in diameter is defined at the middle of the passageway and is provided with a circumferential row of 5/16 inch holes communicating with the annular chamber. As gas flows into the constriction from the holes the resulting ascending bubble stream induces flow of water upwardly through the passageway. The surfaces defining the passageway form a converging cone from the lower flow input end to the constriction, the cone acting in conjunction with the constriction to increase the flow velocity therethrough to augment shearing of gas bubbles emerging from the holes and to promote small bubble formation. The passageway surfaces also form a diverging cone above the constriction.
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