Very-high-velocity entrained-bed gasification of coal
US4278446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | May 31, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S48/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process and apparatus for gasification of carbonaceous matter, preferably coal, is disclosed. A stream of previously produced char, preferably produced from coal, or other fuel together with an oxidizer and steam is introduced into a first or combustion stage. The combustion gas produced by the combustion passes into a second or gasification stage and through a nozzle at at least sonic velocity. Pulverized carbonaceous matter, preferably coal, is introduced and dispersed in the combustion gas in the gasification stage. The temperature, velocity and velocity changes principally of the gas in the gasification stage are controlled to provide a heating rate for the particles of pulverized carbonaceous matter of at least about 10.sup.5 degrees Kelvin per second, and to effect rapid removal of volatile components from the immediate vicinity of the particles. Upon substantial gasification of the particles in the gasification stage, the resultant product stream may be quenched, the char removed, and preferably at least a portion thereof introduced into the combustion stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.