Soil washing apparatus and method
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United States of America Patent
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-
Jun 10, 1997
Issued Date -
N/A
app pub date -
Mar 29, 1995
filing date -
May 7, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for removing hydrocarbons from soil is disclosed. A gradient force machine pulverizes contaminated soils, which are then mixed with release agents in a mixing tank. 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.
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