Mixing apparatus

Details Mixing apparatus Mixing apparatus

1975-01-09

1976-08-03

Hart, Charles N.

Liquid purification or separation

With means to add treating material

Directly applied to separator

210221M, 261 93, B03D 100

Patent

active

039728153

ABSTRACT:
Mixing apparatus includes a tank having an upright draft tube extending down below an operating level of liquid contained in the tank. An upright rotary shaft extending through the draft tube rotates an impeller below the draft tube for pulling gas and water into a submerged mixing zone. A propeller at the bottom of the shaft rotates in the bottom of a tubular upright still-well below the draft tube for pulling liquid upwardly from the bottom of the tank toward the impeller. A perforated, conical shaped shroud extends downwardly and outwardly from the bottom of the draft tube around the top of the impeller blades. Gas bubbles generated by the rotating impeller flow upwardly through the holes in the shroud. A plurality of spaced apart and radially extending vanes on top of the shroud constantly direct the flow pattern of the bubbles in a radial direction away from the mixing unit toward the edges of the tank.

REFERENCES:
patent: 2393976 (1946-02-01), Daman et al.
patent: 2767965 (1956-10-01), Daman
patent: 2875897 (1959-03-01), Booth
patent: 3278170 (1966-10-01), Moritz
patent: 3491880 (1970-01-01), Reck
patent: 3503593 (1970-03-01), Nelson
patent: 3547811 (1970-12-01), McWhirter
patent: 3647069 (1972-03-01), Bailey

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