Hydraulic and earth engineering – Soil remediation – In situ contaminant removal or stabilization
Patent
1996-01-05
1997-08-19
Suchfield, George A.
Hydraulic and earth engineering
Soil remediation
In situ contaminant removal or stabilization
110236, 110346, 432111, 405131, B09B 300, B09C 106
Patent
active
056580940
ABSTRACT:
An improved system for remediating soil contaminated with short-chain hydrocarbons, long-chain hydrocarbons and PCB's. The system includes an rotary drum having first and second heat exchanging regions, each containing separated inner and outer regions. The drum in inclined such that soil fed into the system with a sealed auger for remediation is gravitationally urged through the inner regions whereat thermal energy provided by a burner means, including clamshell ducts, remediates the soil by vaporizing and oxidizing the hydrocarbons and PCB's in a stream of hot gases. After remediation, the soil and the stream of hot gases is transferred to the outer regions whereat the soil is auger-conveyed and fluid-flow urged therethrough, in counter-flow relation to the gravitationally urged soil in the inner regions, to transfer thermal energy from the remediated soil and stream of hot gases to the soil being remediated, to reduce the temperature of the remediated soil and the stream of hot gases prior to discharge, and to discharge the remediated soil and the stream of hot gases. An improved method is similarly provided.
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Cedarapids, Inc
Schoonover Donald R.
Suchfield George A.
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