Method of contaminated soil remediation and apparatus therefor
US4951417A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Nov 4, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/72
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for on-site remedial soil restortation activity of a work site contaminated with volatile organic compounds. Soil is removed from the ground and hauled to an initial feed hopper whereat it is conveyed to an inlet end of a hollow rotating cylinder having plural flights therein for effecting a moving of the contaminated soil lengthwise of the rotating cylinder toward an outlet end. The soil is heated as it tumbles about in the cylinder and the volatile organic compounds (VOCs) are volatilized inside the rotating cylinder. The soil exiting the outlet end of the cylinder is thence recirculated through the rotating cylinder and thereafter fed to a conveying mechanism, whereat the cleaned soil is delivered to a selected location. The hot gases are scrubbed to remove therefrom any organics, acids and phosgenes and, if present, soil fines. The now cleansed gases are thereafter allowed to escape into the atmosphere as clean air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.