Combustion or part-combustion in fluidized beds
US4085707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1976 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Feb 12, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2208/00132
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In the partial or full combustion of fuels in a fluidized bed, the provision of heat transfer surfaces within the bed impedes particle circulation resulting in localized regions of relative intense chemical reaction which can damage the heat transfer surfaces and cause detrimental physical and/or chemical changes in the bed particles. This problem is exacerbated when the bed is relatively deep and narrow and when the part of full combustion is effected under pressure. In the invention, at least one conduit connects an upper region of the bed to a lower region of the bed, and expedients are provided to cause a downward particle flow through the conduit(s) thereby promoting an upward flow in the bed. Heat exchange surfaces may be in the bed and/or in the conduit(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.