Method and apparatus for gasifying carbonaceous material
US4799937A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Sep 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/1807
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of and apparatus for gasifying carbonaceous material in a circulating fluidized bed reactor having a lower reactor chamber and an upper reactor chamber interconnected by a throttled throat portion. Carbonaceous material is supplied to a first fluidized bed gasification zone maintained in the lower chamber and is gasified there by a gasifying agent and recycled hot particles separated from the product gas. The effluent from the first gasification zone is passed upwardly through the throttled throat portion to a second fluidized bed gasification zone of the spouting-bed type maintained in the upper chamber to complete gasification of unconverted carbon remaining in the particles entrained in the gaseous effluent from the first zone at a higher temperature than that of the first zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.