Air lift diffuser

Details Air lift diffuser Air lift diffuser

C - Chemistry, Metallurgy

02

F

362/9

C02F 1/74 (2006.01) B01F 3/04 (2006.01) B01F 13/00 (2006.01) B01F 15/00 (2006.01)

Patent

CA 2006890

ABSTRACT An air lift diffuser for use in the aeration of a body of water including an air lift tube and a gas diffuser located a distance below the open bottom end of the air lift tube. The distance in question is sufficiently large that there is substantially no obstruction to the passage of water from the space surrounding the air lift diffuser into the space between the air lift tube and the diffuser, but at the same time is not so large that rising air bubbles are likely to escape and flow outside the air lift tube. In one embodiment, a cylindrical return tube is provided around the air lift tube that directs the water stream and gas bubbles entrained therein downward, after they have risen in the air lift tube, so as to return the aerated water to the lower levels of the body of water being aerated.

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