Process for clean-burning fuel from low-rank coal
US5322530A · kind A · utility
29Cited by
17References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Oct 20, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for upgrading and stabilizing low-rank coal involving the sequential processing of the coal through three fluidized beds; first a dryer, then a pyrolyzer, and finally a cooler. The fluidizing gas for the cooler is the exit gas from the pyrolyzer with the addition of water for cooling. Overhead gas from pyrolyzing is likely burned to furnish the energy for the process. The product coal exits with a tar-like pitch sealant to enhance its safety during storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.