Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Patent
1995-07-26
1997-06-10
Drodge, Joseph W.
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
68 18R, 210104, 210138, 210182, 210258, 210259, B01D 3600
Patent
active
056372124
ABSTRACT:
A waste water treatment machine for use primarily with dry cleaning equipment to remove the solvent perchlorethylene and other contaminants from waste water so the purified water can be returned to the environment. The machine includes a collecting tank to collect waste water from both a dry cleaning machine and a dry cleaning vacuum press which vacuum waste water and solvent from garments that still remains therein after the dry cleaning operation is completed. The treatment machine pumps the collected waste water through filters and an elevated separation tank wherein the heavier than water perchlorethylene separates from the water, the machine having a re-circulation conduit through which the partially purified water above a separation level in the separation tank can flow by gravity back down for re-circulation through the filters and then pumped up again to the separation tank for additional filtering and separation of the solvent and other contaminants. The waste water can be re-circulated as many times as needed to purify the water, after which it is flowed to a heating chamber for vaporizing and discharge to the atmosphere as steam.
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Drodge Joseph W.
Kettelson Ernest
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