Method and apparatus for advanced staged combustion utilizing forced internal recirculation
A method and apparatus for combustion of a fuel in which a first-stage fuel and a first-stage oxidant are introduced into a combustion chamber and ignited, forming a primary combustion zone. At least about 5% of the total heat output produced by combustion of the first-stage fuel and the first-stage oxidant is removed from the primary combustion zone, forming cooled first-stage combustion products. A portion of the cooled first-stage combustion products from a downstream region of the primary combustion zone is recirculated to an upstream region of primary combustion zone. A second-stage fuel is introduced into the combustion chamber downstream of the primary combustion zone and ignited, forming a secondary combustion zone. At least about 5% of the heat from the secondary combustion zone is removed. In accordance with one embodiment, a third-stage oxidant is introduced into the combustion chamber downstream of the secondary combustion zone, forming a tertiary combustion zone.
- Research Organization:
- Gas Technology Institute, Des Plaines, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC07-95ID13333
- Assignee:
- Gas Technology Institute (Des Plaines, IL)
- Patent Number(s):
- 6,663,380
- Application Number:
- 09/946,444
- OSTI ID:
- 1174623
- Country of Publication:
- United States
- Language:
- English
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