Patent ID: 6818126
Filing Date: 2004-11-16
Classification: B01D,Y10S

Abstract:
A filter system for receiving an oil-in-water emulsion contaminated with an emulsified contaminant oil, and separating the emulsified contaminant oil from the oil-in-water emulsion, comprising:a filter media for receiving the oil-in-water emulsion and emulsified contaminant oil, the filter media having an inner filter element formed from a 95 percent single pass efficiency 48 micron, 5 micron nominal filtering material of needle punch polypropylene felt, an outer filter element formed from a 95 percent single pass efficiency 19 micron filtering material filtering material of a polypropylene microfiber material and a porous spunbond polypropylene surrounding the outer filter media, the filter element de-emulsifying the emulsified contaminant oil from the oil-in-water emulsion into the contaminant oil and the oil-in-water emulsion, coalescing the de-emulsified contaminant oil, separating the coalesced de-emulsified contaminant oil from the oil-in-water emulsion, and passing the coalesced de-emulsified contaminant oil and the oil-in-water emulsion; a first tank for supporting the filter element, the first tank further configured to hold a quantity of the separated de-emulsified contaminant oil and the oil-in-water emulsion, the first tank having an overflow passing to a second tank, the second tank having an oil separation assembly for removing the oil-in-water emulsion from the contaminant oil and passing the oil-in-water emulsion therefrom.