Liquid circulating device

Liquid purification or separation – With means to add treating material – Directly applied to separator

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Details

261 77, 261123, B01F 304, C02F 328

Patent

active

054663695

ABSTRACT:
A liquid circulating device is provided for submersion in a large holding tank to effect continuous mixing and circulation of a liquid material, such as sewage sludge, contained therein in order to facilitate the digestion of the liquid material for environmentally safe disposal. The device includes an upright, elongated stackpipe secured to the floor of the holding tank and a gas bubble generator mounted to the stackpipe for generating gas bubbles into the stackpipe. The gas bubble generator includes an interior chamber with a substantially open bottom, a pair of baffle members transversely extending within the interior chamber and an inverted cone-shaped member positioned between and in spaced adjacency to each baffle member. Gas under pressure is discharged into the interior chamber of the bubble generator by a gas supply line attached to an externally located compressor. A well-formed, stable gas bubble created in the interior chamber of the bubble generator flows down a smooth upper surface portion of each baffle member and into the cone-shaped member which is in flow communiction with the stackpipe. The continual generation of well-formed, stable gas bubbles into the stackpipe propels the liquid material upwardly through the stackpipe and effects the circulation, mixing, and digestion of the contents. The generation of well-formed, stable gas bubbles is enhanced by mounting the gas bubble generator directly to the stackpipe and not letting the gas bubbles loose between the gas bubble generator and the stackpipe.

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patent: 4569757 (1986-02-01), Moore
patent: 4569804 (1986-02-01), Murphy
patent: 4752421 (1988-06-01), Makino
patent: 5133907 (1992-07-01), Weber et al.

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