Patent ID: 9370809
Filing Date: 2016-06-21
CPC Classification: B09C

Claim Text:
1. A method for in-situ cleaning a contaminate soil, the method comprising inserting a double wall conduit into a ground soil, wherein the double wall conduit comprises an inner conduit disposed inside an outer conduit, wherein the inner conduit comprises an inlet at a first end of the inner conduit, wherein the outer conduit comprises an outlet at a first end of the outer conduit, wherein the inner conduit is fluidly communicated with the outer conduit at second ends of the inner and outer conduits, wherein the outer conduit comprises a perforated outer wall; flowing a first gas to the inlet, wherein the first gas is heated above the temperature of the ground soil, wherein the first gas passes along the inner and outer conduits to the outlet; flowing a second gas to the inlet, wherein the temperature of the second gas is lower than the temperature of the first gas, wherein the second gas passes along the inner and outer conduits to the outlet; collecting a flow of volatile contaminants passing through the perforated outer wall, wherein the contaminant flow is configured to mix with the first gas flow at the outer conduit.