Method for producing soil, soil-processing unit, method for processing and unit for processing
US7156027B1 · kind B1 · utility
3Cited by
28References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Sep 29, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2219/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An object to be treated such as soil, burned fly ashes, or the like containing organic halides is introduced to a hermetically sealable thermal decomposition furnace 310 and heated under reduced pressure. Emitted gases of the object to be treated are treated so that the generation and recomposition of dioxins are supressed. A heated residue of the object to be treated is cooled after being purged with a purge gas which is organic halide-free and has no organic halide generating capacity. Thus, the concentration of organic halides remaining in the heated residue can be held to an extremely low level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.