Method for treatment of oil sludge by thermal treatment-supercritical extraction

Method for treatment of oil sludge by thermal treatment-supercritical extraction

  • CN 103,058,471 A
  • Filed: 10/21/2011
  • Published: 04/24/2013
  • Est. Priority Date: 10/21/2011
  • Status: Active Application
First Claim
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1. a thermal treatment-supercritical extraction is processed the method for greasy filth, may further comprise the steps:

  • (1) greasy filth behind the mechanical dehydration is heated to 100~

    300 ℃

    under anoxic condition, then enters knockout tower and carry out flash evaporation, obtain heavy oil content and solids and take out in knockout tower with the form of mud;

    (2) mud and the extraction agent after the above-mentioned thermal treatment flash distillation enters supercritical extraction unit, sets supercritical extraction pressure and supercritical extraction temperature, carries out supercritical extraction;

    (3) material after the extraction enters primary separator and separates with second-stage separator, recycles after the solvent gasification, and extract is emitted from the separator bottom, settlement separate after, obtain oil content and solids.

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