Process for the production of fuel gas from coal
US4315758A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1979 |
| Grant date | Feb 16, 1982 |
| Priority date | — |
| Expiry date | Oct 18, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/0976
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved apparatus and process for the conversion of hydrocarbonaceous materials, such as coal, to more valuable gaseous products in a fluidized bed gasification reaction and efficient withdrawal of agglomerated ash from the fluidized bed is disclosed. The improvements are obtained by introducing an oxygen containing gas into the bottom of the fluidized bed through a separate conduit positioned within the center of a nozzle adapted to agglomerate and withdraw the ash from the bottom of the fluidized bed. The conduit extends above the constricted center portion of the nozzle and preferably terminates within and does not extend from the nozzle. In addition to improving ash agglomeration and withdrawal, the present invention prevents sintering and clinkering of the ash in the fluidized bed and permits the efficient recycle of fine material recovered from the product gases by contacting the fines in the fluidized bed with the oxygen as it emanates from the conduit positioned within the withdrawal nozzle. Finally, the present method of oxygen introduction permits the efficient recycle of a portion of the product gases to the reaction zone to increase the reducing properties of the ho…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.