Hydraulic and earth engineering – Temperature modification or control of earthen formation
Patent
1996-02-20
1997-10-28
Taylor, Dennis L.
Hydraulic and earth engineering
Temperature modification or control of earthen formation
405128, 405131, 405258, 588 1, 588249, 62260, B09B 300, A62D 300
Patent
active
056811306
ABSTRACT:
A thermal barrier is disclosed for surface confinement with active cooling to control subsurface pressures during thermal remediation of shallow (5-20 feet) underground contaminants. If steam injection is used for underground heating, the actively cooled thermal barrier allows the steam to be injected into soil at pressures much higher (20-60 psi) than the confining strength of the soil, while preventing steam breakthrough. The rising steam is condensed to liquid water at the thermal barrier-ground surface interface. The rapid temperature drop forced by the thermal barrier drops the subsurface pressure to below atmospheric pressure. The steam and contaminant vapors are contained by the thermal blanket, which can be made of a variety of materials such as steel plates, concrete slabs, membranes, fabric bags, or rubber bladders.
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Aines Roger D.
Newmark Robin L.
Grzybicki Daryl S.
Regents of the University of California
Sartorio Henry P.
Taylor Dennis L.
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