Cleaning and liquid contact with solids – Apparatus – With means for collecting escaping material
Patent
1991-03-06
1992-12-29
Coe, Philip R.
Cleaning and liquid contact with solids
Apparatus
With means for collecting escaping material
134182, 241 60, 366337, B08B 304
Patent
active
051743167
ABSTRACT:
A cleaning apparatus includes a shredder that converts plastic containers, packages and cups into relatively small fragments (e.g., about one to two square inches) to promote cleaning. The shredder intake may be located below the discharge end of a conveyor upon which plastic items are placed after being separated from other refuse in a salvage operation. Fragments produced by the shredder are delivered to a reservoir containing many gallons of cleaning liquid, e.g., water and a detergent. A pump propels the liquid and light-weight plastic fragments (typically foamed polystyrene) to an elongated chamber that serves to turn and twist the fragments with sufficient turbulence so as to clean them during their excursion through the chamber. Turbulence is preferably achieved by providing a plurality of static devices constituting fixed obstructions around which the pumped liquid flows. The obstructions are placed at locations and angles that force the liquid-borne plastic particles to repeatedly shift position and change direction in a chaotic manner as they move through the chamber. The pump-driven fragments eventually leave the elongated chamber and exit to a solids/liquid separator. A substantial portion of the filtered liquid is then returned to the wash tank, on a continuous basis, for making another excursion through the elongated chamber. The clean plastic fragments are moved by a conveyor to a drying chamber where they are subjected to a high volume of heated air-to ensure that they are sufficiently dry to be packaged for recycling.
REFERENCES:
patent: 3664354 (1972-05-01), Minbiole, Jr. et al.
patent: 3704006 (1972-11-01), Grout et al.
patent: 4135829 (1979-01-01), Grillo et al.
patent: 4594005 (1986-06-01), Sakamoto et al.
patent: 4674888 (1987-06-01), Carlson
Keller Roy R.
Kline Frank E.
Coe Philip R.
Food Technology International Inc.
McHugh Charles W.
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