Method and system for the in-situ decontamination of contaminated soils
First Claim
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1. A method for in-situ decontamination of a contaminated soil region which contains pollutants degradable with a decontaminating fluid substance through chemical oxidation, comprising:
- selecting, with an injection device, an injection pressure from a plurality of available injection pressures,introducing a first component of the fluid substance via a first conduit to a depth of the contaminated soil region,introducing a second component of the fluid substance via a second conduit physically and chemically separated from the first conduit to the depth of the contaminated soil region,mixing the introduced first component and the introduced second component at the depth to produce the decontaminating fluid substance,injecting the decontaminating fluid substance at the selected pressure from at least one outlet valve, anddirecting the injected fluid substance from the outlet valve into the contaminated soil region between horizontal bars that protrude radially towards the contaminated soil region.
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Abstract
A method and an associated system for in-situ decontamination of a contaminated soil region (2) which contains degradable pollutants, in which a fluid substance is introduced into the soil (1) using an injection device (4, 4′), wherein the fluid substance is introduced into the soil using a pressure injection method in a pressure-controlled manner and/or with an injection device that has a valve pipe with a pressure-controlled outlet valve.
35 Citations
17 Claims
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1. A method for in-situ decontamination of a contaminated soil region which contains pollutants degradable with a decontaminating fluid substance through chemical oxidation, comprising:
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selecting, with an injection device, an injection pressure from a plurality of available injection pressures, introducing a first component of the fluid substance via a first conduit to a depth of the contaminated soil region, introducing a second component of the fluid substance via a second conduit physically and chemically separated from the first conduit to the depth of the contaminated soil region, mixing the introduced first component and the introduced second component at the depth to produce the decontaminating fluid substance, injecting the decontaminating fluid substance at the selected pressure from at least one outlet valve, and directing the injected fluid substance from the outlet valve into the contaminated soil region between horizontal bars that protrude radially towards the contaminated soil region. - View Dependent Claims (2, 3, 4)
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5. A method for in-situ decontamination of a contaminated soil region which contains pollutants degradable with a decontaminating fluid substance through chemical oxidation, comprising:
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selecting, with an injection device, an injection pressure from a plurality of available injection pressures, selecting, with the injection device, from among a plurality of available upper and lower axial boundaries, constraining propagation elevations for the decontaminating fluid substance through the selected axial boundaries, mixing components of the fluid substance, to produce the decontaminating fluid substance, between the selected upper and lower axial boundaries, injecting the decontaminating fluid substance at the selected pressure and within the selected axial boundaries from at least one outlet valve into at least the contaminated soil region, and directing the injected decontaminating fluid substance into the contaminated soil region with horizontal bars that protrude radially from and at least partly around the outlet valve towards the contaminated soil region. - View Dependent Claims (6, 7, 8)
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9. A system for in-situ decontamination of a contaminated soil region in a soil which contains degradable pollutants, comprising:
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a source configured to provide a first component of a fluid substance and a second component of the fluid substance physically and chemically separated from the first component, an outlet valve arranged at a depth of the contaminated soil region in the soil, an injection line extending between the source and the outlet valve, a pump and a valve pipe arranged in the injection line, and a mixing device arranged in the injection line between the pump and the outlet valve, and configured to mix the first component and the second component to produce a decontaminating fluid substance, wherein the valve pipe comprises an outer wall with radially protruding horizontal bars configured to direct the fluid substance radially away from the valve pipe and into the contaminated soil region, and configured to delimit a propagation direction of the decontaminating fluid substance in the soil, wherein the injection line comprises a superterranean portion and a subterranean portion, and wherein the mixing device is arranged in the subterranean portion of the injection line. - View Dependent Claims (11, 12)
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10. The system as claimed in 9,
wherein the mixing device is arranged at a depth in the soil corresponding at least substantially to a depth in the soil of the outlet valve.
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13. A system for in-situ decontamination of a contaminated region which contains degradable pollutants in a soil, comprising:
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a source configured to provide a first component and a second component of a decontaminating fluid substance, an outlet valve in a valve pipe and arranged at a depth in the soil of the contaminated region, an injection line extending between the source and the outlet valve, and configured to convey the first component and the second component in mutually separated conduits to a mixing device for the components arranged upstream of the outlet valve, a pump arranged in the injection line, and horizontal bars extending radially from an outer wall of the valve pipe and at least partly circumferentially around the valve pipe towards the contaminated region, and configured to delimit elevations of propagation of the decontaminating fluid substance to a depth range within the soil that corresponds to the contaminated region. - View Dependent Claims (14, 15, 16, 17)
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Specification