| 简介 |
PROBLEM TO BE SOLVED : To provide a method for recovering an oil content from oil-containing sludge without a danger of inflammation and explosion, preventing thermal denaturation of a recovered oil content and capable of obtaining a high-quality oil content at a cheap treatment cost, and its apparatus.
SOLUTION : After the oil-containing sludge including a solid content having earth and sand or the like, and a moisture is heated to provide fluidity, first the solid content is separated from a mixture of a fine oil droplet, a vaporized oil content, the solid content and steam by ejecting this with super-heated steam and nitrogen gas in a condition of cutting off air, and then the fine oil droplet, the vaporized oil content and the steam are cooled to recover the high-quality oil content by a difference of density.
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