SOIL WASHING APPARATUS AND METHOD

摘要

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.