Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1987-10-21
1989-04-04
Lacey, David L.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209 10, 209168, 210188, 2102211, 210703, 210788, 55 87, 55178, B03D 110, B10D 1902
Patent
active
048183776
ABSTRACT:
A defrothing apparatus whose inlet opening of the foamed liquid contained in a foam duct of a primary flotation apparatus is provided in the bottom of the foam duct. Starting from the lower area of the defrothing apparatus, a rotary flow (potential vortex) is generated in the apparatus by a recirculated lqiuid quantity from a secondary flotation apparatus. In the core of the rotary flow the gas quantity (air) is collected and removed through a removal pipe. Consequently, the foamed liquid from the foam duct of the primary flotation stage which is pumped to the secondary flotation stage contains small shares of gas relative to the total quantity of liquid, thereby allowing the pump to be optimally sized of efficiency and better control of the system.
REFERENCES:
patent: 2765867 (1956-10-01), Revaller
patent: 3669883 (1972-06-01), Huckstedt
patent: 4475932 (1984-10-01), Hull
patent: 4708793 (1987-11-01), Cathriner
Dorflinger Hans-Dieter
Schweiss Peter
J.M. Voith & GmbH
Jeffers Albert L.
Lacey David L.
Lithgow Thomas M.
Robinson Richard L.
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