Cofiring coal-water slurry in cyclone boilers: Some combustion issues and considerations
- Tennessee Valley Authority, Chattanooga, TN (United States)
- Foster Wheeler Environmental, Sacramento, CA (United States)
Coal-water slurry (CWS) has become a fuel of opportunity with the ability to impact fuel cost at selected power plants; at the same time it has the potential to reduce emissions of oxides of nitrogen (NO{sub x}) by driving specific combustion mechanisms. CWS, produced from selected fines generated during coal cleaning operations, has been fired extensively at the Seward Generating Station of General Public Utilities (GPU), and testing has been initiated at cyclone plants as well. Initial combustion modeling of cyclones has shown that the critical issues associated with CWS firing in cyclones include the following: (1) the impact of CWS on fuel chemistry, with particular attention to fuel ash chemistry; (2) the impact of CWS on combustion temperatures; (3) the impact of CWS, and the consequent increased gas flow in the cyclones, on combustion processes in the cyclone barrel and potentially on combustion in the primary furnace as well; (4) the consequence of combustion process changes on patterns of heat release in the cyclone barrel and in the primary furnace; (5) the ability of the CWS to impact NO{sub x} emissions in the cyclone; and (6) the impact of CWS on the formation of trace metal emissions. This paper reviews the results of cyclone boiler modeling, and also reviews some results of initial cyclone testing related to the results of the modeling efforts.
- OSTI ID:
- 490336
- Report Number(s):
- CONF-970310-; TRN: 97:003021-0054
- Resource Relation:
- Conference: 22. international technical conference on coal utilization and fuel systems, Clearwater, FL (United States), 17-20 Mar 1997; Other Information: PBD: [1997]; Related Information: Is Part Of The proceedings of the 22nd international technical conference on coal utilization and fuel systems; Sakkestad, B.A. [ed.]; PB: 1012 p.
- Country of Publication:
- United States
- Language:
- English
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