Method and System for Cleaning a Soil Containing Contaminants
First Claim
1. A method for cleaning a soil containing contaminants comprising the steps of:
- introducing at least one heat-conductive pipe in said soil, whereby said pipe is in working condition under negative pressure and comprises a perforated outer pipe which is provided with a non perforated inner pipe of a smaller diameter such that a space is created between the inner and the outer pipe, heating said soil by thermal conduction by circulating a heated fluid through said heat-conductive pipe thereby obtaining a contaminant vapor, whereby said contaminant vapor is forced into the heat-conductive pipe through a negative pressure present herein, further transporting said contaminant vapor in said heat-conductive pipe (3) out of the soil, incinerating said contaminant vapor in order to at least partly remove said soil contaminants, and re-using the heat energy obtained by incinerating said contaminant vapor for heating said soil in order to vaporize the remaining contaminants in said soil.
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Accused Products
Abstract
A method for cleaning a soil containing contaminants is disclosed. At least one heat-conductive pipe, is introduced in the soil which is in good working condition under negative pressure and provided with perforations. The soil is heated by thermal conduction by circulating a heated fluid through the heat-conductive pipe thereby obtaining a contaminant vapor. The contaminant vapor is forced into the heat-conductive pipe through a negative pressure present in the pipe, and transported in the heat-conductive pipe out of the soil. The contaminant vapor is incinerated in order to at least partly remove the soil contaminants. The method also involves the step of re-using the heat energy obtained by incinerating the contaminant vapor for heating the soil in order to vaporize the remaining contaminants in the soil. A nearly closed loop system for cleaning a soil containing contaminants is disclosed.
24 Citations
25 Claims
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1. A method for cleaning a soil containing contaminants comprising the steps of:
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introducing at least one heat-conductive pipe in said soil, whereby said pipe is in working condition under negative pressure and comprises a perforated outer pipe which is provided with a non perforated inner pipe of a smaller diameter such that a space is created between the inner and the outer pipe, heating said soil by thermal conduction by circulating a heated fluid through said heat-conductive pipe thereby obtaining a contaminant vapor, whereby said contaminant vapor is forced into the heat-conductive pipe through a negative pressure present herein, further transporting said contaminant vapor in said heat-conductive pipe (3) out of the soil, incinerating said contaminant vapor in order to at least partly remove said soil contaminants, and re-using the heat energy obtained by incinerating said contaminant vapor for heating said soil in order to vaporize the remaining contaminants in said soil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for cleaning a soil containing contaminants comprising:
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means for heating said soil comprising at least one heat-conductive pipe which is, in working condition, under negative pressure, and which comprises a perforated outer pipe which is provided with a non perforated inner pipe of a smaller diameter such that a space is created between the inner and the outer pipe, means for forcing a contaminant vapor into said heat-conductive pipe, means for incinerating said contaminant vapor in order to at least partly remove said soil contaminants present in said vapor, and means for re-using the heat energy obtained by incinerating said contaminant vapor for heating said soil in order to vaporize the remaining contaminants in said soil. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification