Inclined fluidized bed system for drying fine coal
US5087269A · kind A · utility
61Cited by
6References
66Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 3, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Aug 3, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B21/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Coal is processed in an inclined fluidized bed dryer operated in a plug-flow manner with zonal temperature and composition control, and an inert fluidizing gas, such as carbon dioxide or combustion gas. Recycled carbon dioxide, which is used for drying, pyrolysis, quenching, and cooling, is produced by partial decarboxylation of the coal. The coal is heated sufficiently to mobilize coal tar by further pyrolysis, which seals micropores upon quenching. Further cooling with carbon dioxide enhances stabilization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.