Thermal apparatus and process for removing contaminants from oil

  • US 20020029996A1
  • Filed: 05/22/2001
  • Published: 03/14/2002
  • Est. Priority Date: 09/27/1996
  • Status: Active Grant
First Claim
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1. A thermal process for removing contaminants from oil comprising:

  • providing a rotating vessel having a circumferential wall and end walls forming an internal reaction zone;

    providing a charge of non-ablating coarse granular solids which form a bed within the reaction zone;

    heating the outside of the vessel so as to indirectly heat the reaction zone and the bed of coarse granular solids by conduction through the vessel'"'"'s walls;

    feeding contaminated oil through the one of the vessel'"'"'s end walls so that it discharges into the reaction zone;

    vaporizing and pyrolyzing the oil within the hot reaction zone to produce hydrocarbon vapours and deposit coke, whereby substantially all of the contaminants become associated with the coke;

    scouring the vessel walls with the bed of coarse granular solids to remove coke deposits and comminute the coke into fine solids;

    separating the fine solids from the bed of coarse solids;

    removing the hydrocarbon vapours and fine solids from the reaction zone;

    recovering the fine solids and vapours separately; and

    condensing the vapours to recover substantially contaminant-free product oil

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