Soil washing apparatus and method

Details Soil washing apparatus and method Soil washing apparatus and method

B - Operations, Transporting

09

C

B09C 1/02 (2006.01) B01D 17/00 (2006.01) B01D 21/00 (2006.01) B03B 9/02 (2006.01) B09C 1/00 (2006.01)

Patent

CA 2215826

An apparatus and method for removing hydrocarbons from soil is disclosed. A gradient force machine (22) pulverizes contaminated soils (10), which are then mixed with release agents in a mixing tank (24). A water-filled separation unit receives the mixed soil, the unit having a plurality of counter-rotating augers to aid in the breakdown of the mixed soil to solid, water and hydrocarbon components. A washing container receives the solid component from the separation unit, the container having a diagonally-disposed, enclosed auger for outputting a washed solid component. Hydrocarbons that have floated to the top of the separation unit and washing container are removed by a vacuum system.

L'invention concerne un dispositif et un procédé servant à extraire des hydrocarbures du sol. Une machine de pulvérisation et de déshydratation cyclonique (22) pulvérise les sols contaminés (10) qui sont ensuite mélangés à des agents décollants dans un réservoir de mélange (24). Une unité de séparation remplie d'eau reçoit le mélange, cette unité possédant une pluralité de vis sans fin contrarotatives qui contribuent à la désagrégation de la matière du sol mélangée en solides, en eau et en hydrocarbures. Un réservoir de lavage reçoit le constituant solide de l'unité de séparation, ce réservoir possédant une vis sans fin diagonale et renfermée permettant de sortir un constituant solide lavé. Les hydrocarbures qui flottent à la surface de l'eau de l'unité de séparation et du réservoir de lavage sont enlevés à l'aide d'un système d'aspiration.

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