Vibrating membrane micro-filtration of used oil

摘要

The invention discloses a waste oil treatment method which carries out treatment on the waste oil containing physical pollutants to recover the reclaimed oil with low content of physical pollutants. A blast of waste oil flow is induced under a drive pressure opposite the outer surface of a porous micro filtration membrane with an aperture of 0.01 Mu m to 1Mu m. The waste oil flow is separated into a retentate positioned at the outer side of the filtration membrane and into the reclaimed oil positioned at the inner side of the filtration membrane. The retentate is centrifugalized to separate the components rich of pollutants from the condensate of the waste oil; the condensate of the waste oil is diluted by a solvent to form an oil solution with a viscosity of 50cSt to 90cSt under 40 DEG C. A blast of waste oil flow is induced under a drive pressure opposite the outer surface of a vibrating micro filtration membrane with an aperture of 0.01 Mu m to 1Mu m and an osmotic solution is extracted from the inner side of the filtration membrane; then the solvent in the osmotic solution is evaporated out to form the reclaimed oil and the solvent steam.