Hydraulic and earth engineering – Fluid control – treatment – or containment
Patent
1993-10-01
1996-08-20
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
204196, 405128, 405159, E02B 1300
Patent
active
055473113
ABSTRACT:
A system for cathodically protecting a structure that is in contact with soil and for extracting vapor or liquid from the soil, comprising a porous conducting material in direct contact with the soil, a power source being connected to the structure, a tubing string including a central tubing passage, at least one anode electrically connected to the positive terminal of said power source and having a bore therethrough, said bore being aligned with said tubing passage, at least one screen section comprising a hollow member having perforations therethrough and end openings, said end openings being aligned with said tubing passage, said tubing string, said screen and said anode being surrounded and supported by said conducting material such that current provided by said power source flows through said lead to said anode, and from said anode through conducting material and soil into the structure, said tubing string, said screen and said anode being aligned and connected such that vapor or liquid present within the soil can enter the system through said screen section and be drawn out of said tubing passage, said porous conducting material filtering the vapor or liquid to remove solid particles therefrom before the vapor or liquid enters said screen. In a second embodiment, the system is provided with means that allow it to function as a source of heat, providing thermal soil remediation capability.
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