Thermal desorption system
First Claim
Patent Images
1. A process for removing a contaminant from a material comprising the steps:
- providing a heated chamber with a substantially inert atmosphere;
maintaining the chamber at pressure below atmospheric pressure;
fluidizing the material in the chamber with a fluidizing gas to volatilize the contaminant from the material thereby creating a process gas stream containing the volatilized contaminant;
removing the volatilized material from the chamber;
removing the process gas stream from the chamber;
removing solids that are entrained in the process gas stream at a temperature above the condensation point of the contaminate;
separating the contaminant from the process gas stream; and
utilizing a portion of the process gas as the fluidizing gas.
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Abstract
A thermal desorption system for the treatment of contaminated solids.
60 Citations
35 Claims
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1. A process for removing a contaminant from a material comprising the steps:
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providing a heated chamber with a substantially inert atmosphere; maintaining the chamber at pressure below atmospheric pressure; fluidizing the material in the chamber with a fluidizing gas to volatilize the contaminant from the material thereby creating a process gas stream containing the volatilized contaminant; removing the volatilized material from the chamber; removing the process gas stream from the chamber; removing solids that are entrained in the process gas stream at a temperature above the condensation point of the contaminate; separating the contaminant from the process gas stream; and utilizing a portion of the process gas as the fluidizing gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A process for removing a contaminant from a material comprising the steps:
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providing a chamber with a substantially inert atmosphere at a pressure below atmospheric pressure; fluidizing the material in the chamber to volatilize the contaminant from the material; removing chamber gas containing volatilized contaminant from the chamber; and separating the contaminant from the chamber gas. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A mobile thermal desorption system for removing a contaminant from a material, said system comprising:
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a fluidizing chamber adapted to contain a fluidized bed of material, said chamber having a material inlet, a material outlet, a gas inlet and a gas outlet; a particulate separator in communication with said gas outlet of said chamber, said separator having a solids outlet and a gas outlet; a condenser in communication with said gas outlet of said separator, said condenser having a contaminant outlet and a gas outlet; and a preheater in communication with said gas outlet of said condenser, said preheater in communication with said gas inlet of said chamber. - View Dependent Claims (31, 32, 33, 34, 35)
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Specification