Apparatus and method for clarifier sludge collection

Details Apparatus and method for clarifier sludge collection Apparatus and method for clarifier sludge collection

1993-06-14

1994-08-23

Dawson, Robert A.

Liquid purification or separation

Processes

Separating

210520, 210528, 210525, 210 87, B01D 3700

Patent

active

053404858

ABSTRACT:
A sludge removal apparatus for a clarifier/thickener tank includes a central rotatable or stationary sealed sludge collection box submerged in the tank and surrounding a vertical, central influent column or support shaft. The collection box is positioned at any elevation between the tank bottom to a position just below the liquid/air level in the tank. At least one rotatable rake arm, preferably one or two pairs of spaced rake arms each having a spiral blade, is affixed to and rotates with the box and a driving cage, to inwardly push or pick-up sludge at the tank bottom for transport to the collection box. A substantially controlled flow of sludge may be provided into the collection box by valved or adjustable gate control through a sidewall opening in the collection box.

REFERENCES:
patent: 3314547 (1967-04-01), Kivell
patent: 3487017 (1969-12-01), Thorn et al.
patent: 3892666 (1975-07-01), Quast
patent: 4193877 (1980-03-01), Lillywhite
patent: 5219470 (1993-06-01), Bradley et al.

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