Hydraulic and earth engineering – Soil remediation – In situ contaminant removal or stabilization
Patent
1989-12-05
1991-06-18
Taylor, Dennis L.
Hydraulic and earth engineering
Soil remediation
In situ contaminant removal or stabilization
405129, 405258, F02D 300
Patent
active
050245562
ABSTRACT:
The present invention comprises a system for promoting the destruction of volatile and/or hazardous contaminants present in waste materials during in situ vitrification processes. In accordance with the present invention, a cold cap (46) comprising a cohesive layer of resolidified material is formed over the mass of liquefied soil and waste (40) present between and adjacent to the electrodes (10, 12, 14, 16) during the vitrification process. This layer acts as a barrier to the upward migration of any volatile type materials thereby increasing their residence time in proximity to the heated material. The degree of destruction of volatile and/or hazardous contaminants by pyrolysis is thereby improved during the course of the vitrification procedure.
REFERENCES:
patent: 4376598 (1983-03-01), Brouns et al.
patent: 4957393 (1990-09-01), Buelt et al.
Battelle (Memorial Institute)
Taylor Dennis L.
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