Liquid purification or separation – Processes – Separating
Patent
1989-05-02
1990-09-04
Hruskoci, Peter
Liquid purification or separation
Processes
Separating
210778, 210791, 210805, 208177, B01D 3702
Patent
active
049542672
ABSTRACT:
A process for separating water and hydrocarbon from the solids in a petroleum product tank sludge is water-free, solvent-free, conducted at ambient conditions, utilizes no pre-coating with a filter aid, and creates no hazardous environment for filtering finished product sludge, such as gasoline. The process comprises operating a first pump and pumping sludge to a mixing tank and agitating the mixture. Solids content is measured and a determined volume of filter aid is added. The filter aid and sludge are mixed by operation of a mixer assembly which co-acts with baffles in the tank to achieve homogeneity in the mixing tank. A second pump pumps the mixing sludge and filter aid through one of a plurality of alternately selectable sealed horizontal plate filter and recirculates the filtered liquid back through the mixing tank until a desired clarity is reached. The filtered liquid may be pumped to an oil/water separator and the filtrate, or cake, collected on the filter plates is dried, preferably by introduction of an inert gas, and removed to be be taken to a disposal site.
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patent: 4774007 (1988-09-01), Gordon
Hruskoci Peter
Shideler Krisanne
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