William J Shortreed

US Patent:

6391198, May 21, 2002

Filed:

Jun 22, 2001

Appl. No.:

09/887841

Inventors:

Brian E. Porter - Lyons IL
William J. Shortreed - Columbia SC

Assignee:

Safety-Kleen Systems, Inc. - Columbia SC

International Classification:

B01D 2124

US Classification:

210241, 210167, 2105321, 210120, 210436, 210258, 210259, 2104161, 210299

Abstract:

An oil-water and oil emulsion separation system using a plurality of transport vessels as the separation tanks. The containers or tanks are arranged in series with sludge or oil removed first and thereafter remaining oil is removed and finally a relatively pure aqueous solution is returned to the system. The unit is useful with parts washers or any apparatus with which water is contaminated by free oil or sludge. A floating skimmer is placed in the users sump and a vacuum draws this into a series of containers in which it is processed and in which sludge and oil are successively separated. A positive displacement pump is used. A manifold having vacuum relief valves for at least one container is also provided. In one embodiment, flow restrictors are placed in at least one manifold.