SYSTEM FOR EVAPORATING VOLATILE MATERIAL TO RECYCLE OIL SHALE EXTRACTION RESIDUE, AND METHOD FOR RECYCLING OIL SHALE EXTRACTION RESIDUE USING SAME

摘要

The present invention relates to a recycling system and a method for recycling by means of same, in which sludge, an extraction residue of oil shale, is drawn into a light oil mixing tank and mixed thoroughly by means of light oil or an extractant to separate heavy oil, then heavy oil and extractant/light oil are additionally recovered by means of a sludge separation apparatus, and the oil shale sludge, which is an extraction residue, is transported, after preliminary storage in an intermediate storage tank, to an evaporation apparatus for recovering light oil so as to maximally recover the extractant/light oil and the like which is the final organic material possible to be recovered, thereby allowing dry oil shale residue to be generated. The present invention has the benefit of increasing the amount heavy oil recovered by additionally recovering heavy oil and light oil/extractant still remaining within the sludge, an extraction residue of oil shale from which heavy oil has been recovered by means of an extractant, and of allowing an environment-friendly post-processing step of eliminating the light oil/extractant and the like, which are the final discharges, from within the oil shale residue and thus reducing the organic content therein, and of minimizing the amount of light oil and extractant in the residual sludge by passing the heavy oil through the sludge separation apparatus and an evaporation process after extracting the heavy oil from the oil shale by means of the light oil or an extractant.