Contaminant extractor and method

Details Contaminant extractor and method Contaminant extractor and method

1994-07-06

1999-06-08

Bennett, Henry A.

Furnaces

Combined

47 142, 110236, 110250, 110346, 432261, 134 21, F23B 700

Patent

active

RE0362220

ABSTRACT:
An improved method and apparatus for removal of contaminants such as petroleum hydrocarbons from contaminated soil. The apparatus of the invention includes a shallow container, preferably with vertical sides, which has in its bottom wall a multiplicity of elongated recessed chambers with an open mesh entry area at the upper side, and a gas discharge orifice at one end of each chamber. A rack containing burners is adapted for positioning over the material to be treated within the container. The invented method includes charging materials to be treated into a container, heating the material while creating a partial pressure within the chamber, establishing a vacuum to pull the gasses downwardly through the soil and atmospheric air downwardly with the gasses, then either collecting or discharging the removed gasses, after which the soil is removed from the treatment chamber.

REFERENCES:
patent: 4667609 (1987-05-01), Hardison et al.
patent: 4821654 (1989-04-01), Becker et al.
patent: 4895085 (1990-01-01), Chips
patent: 5072674 (1991-12-01), Noland et al.
patent: 5078868 (1992-01-01), Robertson
Fawcett, H.E., ed., Hazardous and Toxic Materials, Safe Handling and Disposal, Second Edition, John Wiley & Sons, NY, 1988, pp. 345-411.
Michaels, P.A., "Terra Vac in Situ Vacuum Extraction System Application Analysis Report", EPA Report PB-90-119744/XAB, Jul. 1989, 65 pp., Jul. 1989.

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