Bubble-shearing diffuser

Details Bubble-shearing diffuser Bubble-shearing diffuser

B - Operations, Transporting

01

F

362/25

B01F 15/02 (2006.01) B01F 13/02 (2006.01)

Patent

CA 1052481

ABSTRACT OF DISCLOSURE Diffusers on the bottom of a submerged header each include coarse bubble orifices which discharge a stream of air to form a bubble or film on the underside of a horizontal- spreader at the edges of which the bubble is sheared by flowing water into multitudinous tiny bubblets rising in the surrounding liquid as a cloud. An upwardly directed flap valve at the orifice starts the spreading of the air and directs it upwardly so that it will not shoot out beyond the spreader. A second horizontal spreader, slightly above the first, has a similar action, shearing into fine bubblets any larger bubbles which escape from the first spreader to the second. Edges are stag- gered to supply air to aifferent parts of the water flow. The rising bubblets set up a conventional rolling action in the body of liquid. It is this rolling action which produces the flow of water past the spreaders to shear the bubbles at their edges. A snap-in screw-tightened band secures each diffuser to the header.

226844

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