| 摘要 |
Hydrocarbons are removed from solids such as drill cuttings in apparatus including a rotating cylindrical retort vessel having a counter rotating auger-type conveyor therein, the auger-type conveyor is eccentrically located at the bottom of the vessel, the vessel is heated by an induction heating coil surrounding the vessel and traveling along the length thereof, and a retention device is inserted at the downstream end of the retort vessel in order to impede the discharge of solids traveling therethrough, to ensure more complete hydrocarbon removal, and the apparatus includes a general assembly of a pair of retort vessels, each with a counter rotating auger-type conveyor therein, located generally in the same vertical plane, with the downstream end of the upper vessel being in communication with the upstream end of the lower vessel. The method and apparatus find particular utility on off-shore oil and gas wells, wherein the drill cuttings can be rendered environmentally acceptable by removal of hydrocarbons therefrom, so that the drill cuttings can be simply discharged overboard without environmental pollution, and the hydrocarbon removal step is accomplished with reduced risk of fire and/or explosion.
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