PROCESSING METHOD AND APPARATUS FOR REFINING WASTE OIL USING SUPERCRITICAL FLUID

摘要

A method and an apparatus for refining waste oil using supercritical fluid are provided to prevent generation of secondary pollution and waste by collecting extracted pure oil and recycling or recovering the used supercritical fluid. A method for refining waste oil using supercritical fluid includes the steps of: settling free moisture and foreign substances with high-density included in the waste oil by using a density difference(S10); evaporating moisture included in the waste oil by heating the low-density waste oil(S20); dissolving oil, included in the waste oil, in the supercritical fluid(S30); and separating the oil from the supercritical fluid by heating the supercritical fluid with the dissolved oil(S40).