Method and a device for controlling the mixing of gaseous flows in a fluidized bed combustion chamber
US5026269A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Mar 27, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J8/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method and a nozzle bottom for controlling the mixing of gaseous flows in fluidized bed reactors and circulating fluidized bed reactors. In the method, part of the combustion air is introduced into a reactor chamber through fluidizing nozzles (11) positioned in a nozzle bottom (4). In order to improve the controllability of a combustion process, the remaining part of the combustion air is according to the invention introduced through essentially vertically directed jet nozzles (12) positioned in the nozzles bottom (4), and the vertical penetration of the air jets applied through the jet nozzles (12) is maintained at a value essentially higher than the vertical penetration of the air jets applied through the fluidizing nozzles (11). The nozzle bottom (4) according to the invention thus comprises, in addition to the fluidizing nozzles (11), essentially vertically directed jet nozzles (12) the diameter of which is larger, preferably 5 to 20 times larger than the diameter of the fluidizing nozzles (11) and the number of which is essentially smaller than the number of the fluidizing nozzles (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.