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Method and apparatus for vacuum enhanced thermal desorption of hydrocarbon and other contaminants from soils
Method and apparatus for vacuum enhanced thermal desorption of hydrocarbon and other contaminants from soils
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机译：真空增强土壤中碳氢化合物和其他污染物的热解吸的方法和设备
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摘要
A method and apparatus for recovering hydrocarbons from soils which includes introducing the soil material to be treated through a vacuum seal and into a thermal processor which is operated under reduced pressure. The processor includes a centralized heating unit surrounded by concentrically mounted rotatable cylinders. One of the cylinders has a continuous auger extending from the surface thereof and proximate to the other cylinder by way of which the material is conveyed through the processor with a relative of rotation of the cylinders being controlled to ensure optimum vapor separation of the hydrocarbons at low temperature after which the vapors are recovered and condensed. In a preferred embodiment an expansion chamber and supplemental concentric auger heater are used to insure substantial complete separation of the hydrocarbons from the soil prior to discharging the treated soil from the apparatus.
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