Two-zone fluid bed combustion or gasification process
US4154581A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1978 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Jan 12, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of operating a fluidized bed system in a single vessel, typically as a combustor system for power or steam generation burning high-sulfur coal or as a gasifier for high-sulfur coal, which comprises forming an entrained fluidized bed in a first space region containing a first solid bed particle component, such as sand or hematite ore containing over 90% Fe.sub.2 O.sub.3, forming in a limited space region partially within the first region a dense fluidized bed containing a second solid bed particle component, such as larger particles of the hematite, both first and second component particles essentially comprising a material having long-term physical and chemical stability in the fluidized bed system so as to be substantially nonagglomerating and not subject to substantial attrition therein, effecting division of the dense fluidized bed into upper and lower zones, providing a recirculation path such as through a cyclone separator and particle reservoir for the first particle component from the first space region through the upper zone of the dense fluidized bed in the more limited space region, operating the fluidized bed system at a velocity such that the second component p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.