Soil remediation apparatus and method
US5193291A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1992 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Apr 1, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C1/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The portable soil remediation unit includes, on a wheeled flatbed truck, a rotary drum having a burner at one end and an inlet at its opposite end for flowing contaminated soil in counterflow relation to the hot gases of combustion for volatilizing the contaminants. Also mounted on the vehicle is a baghouse. The hot remediated soil is discharged into the baghouse for screw conveyance along the bottom of the baghouse to a baghouse discharge. The particulate-laden gases from the drum enter the baghouse at the opposite end and are separated into particles and clean exhaust gas. The hot remediated soil is in heat transfer contact with the particles and the particles release residual contaminants. The particles flow to the bottom of the baghouse for combination with the remediated soil in the screw conveyor. The hot remediated soil is additionally screened in the baghouse for large and small gradations, the large gradations being discharged from the baghouse for reprocessing. Rocks or organic materials may be introduced into the drum to mechanically clean the drum and assist in heat transfer to the soil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.