Aeration and mixing apparatus

Gas and liquid contact apparatus – Contact devices – Rotating

Patent

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Details

2102422, 261120, B01F 304

Patent

active

051105101

ABSTRACT:
An aeration and mixing apparatus for use in a wastewater treatment facility is mounted on a float and includes an axial-flow mixer having a stem that extends through a flow channel in the float, a diffuser cone slidingly mounted on the mixer stem and a diffuser hood fixedly attached to the diffuser cone and located below the float. A diffuser-drive mechanism mounted on the float transfers the diffuser cone and attached diffuser hood between a first, aeration position and a second, anoxic-mixing position. In the first position, the cone is spaced above the channel of the float and the diffuser hood abuts a bottom surface of the float with wastewater being propelled by the mixer upwardly through the hood and flow channel onto the diffuser cone where it is dispersed outwardly in the air above the float. In the second position, the cone is seated on the float in the channel, blocking flow of fluid through the flow channel, and the diffuser hood is spaced from the bottom of the float with the mixer propelling water downwardly through the hood.

REFERENCES:
patent: 3846516 (1974-11-01), Carlson
patent: 3865909 (1975-02-01), Cramer
patent: 4089620 (1978-05-01), Ravitts
patent: 4350648 (1982-09-01), Watkins, III et al.
patent: 5021154 (1991-06-01), Haegeman

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