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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0427418 (1989-10-27) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 333 인용 특허 : 3 |
An in-situ method is disclosed for removing contaminants from surface and near-surface soil by imposing a vacuum on the soil beneath a impermeable flexible sheet and then heating the soil with an electric surface heater that is positioned on the soil surface under the sheet. The heater is permeable
An in-situ method is disclosed for removing contaminants from surface and near-surface soil by imposing a vacuum on the soil beneath a impermeable flexible sheet and then heating the soil with an electric surface heater that is positioned on the soil surface under the sheet. The heater is permeable to vapors which emanate from the soil when heated. A permeable mat, which may also be a good thermal insulator, separates the heater from the impermeable sheet and provides a conduit for flow of vapors to openings in the sheet. The openings, in turn, are connected to a vacuum manifold for collection of the vapors. A vacuum pump evacuates the region under the impermeable sheet such that the sheet, mat, and heater are pressed firmly against the soil surface by atomospheric pressure. The soil contaminants are removed by vaporization, steam distillation, and/or thermal decomposition.
A method for remediation and decontamination of surface and near-surface soils comprising: placing an electric surface heater on the soil surface; placing a permeable mat above the surface heater; placing an impermeable sheet above the permeable mat; applying a vacuum to the soil through an opening
A method for remediation and decontamination of surface and near-surface soils comprising: placing an electric surface heater on the soil surface; placing a permeable mat above the surface heater; placing an impermeable sheet above the permeable mat; applying a vacuum to the soil through an opening in the impermeable sheet; heating the soil by thermal conduction with the surface heater; vaporizing the contaminants in the soil; and recovering contaminants from the soil through a vacuum collection system.
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