Experimental/modelling studies of the use of coal-based reburning fuels for NOx control

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:257207

Moyeda, D K; Li, B; Maly, P; Payne, R ^[1]

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1. Energy and Environmental Research Corp., Irvine, CA (United States)

Reburning is a NO{sub x} control technology which is gaining more widespread acceptance for application to coal-fired utility boilers. Coal can be used as a reburning fuel, however, more detailed understanding is needed of how coal properties impact its performance as a reburning fuel, and ultimately, how these properties impact boiler performance. This paper describes the results of an experimental and modelling study designed to provide this understanding. In this study, different pulverized coals were evaluated as potential fuels for reburning applications in coal-fired utility boilers. Ten coals were tested in a small pilot-scale facility designed to simulate representative boiler conditions, and with sufficient flexibility to cover an effective range of process parameters. Results of the study have confirmed the viability of coal as a reburning fuel. The sub-bituminous and lignitic coals tested showed the potential to achieve high levels of NO{sub x} control, while performance with bituminous coals tended to be related to fuel nitrogen content and volatility. With all coals reburning performance was also found to be strongly influenced by available residence time and by initial NO{sub x} levels. Existing reburning process models and boiler performance models were adapted to accommodate the coal reburning data, and these models were used to extrapolate performance to possible utility boiler applications.

• OSTI ID: 257207
• Report Number(s): CONF-950952--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION ABATEMENT
BITUMINOUS COAL
BOILERS
COAL RANK
COCOMBUSTION
COMBUSTION PRODUCTS
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FOSSIL-FUEL POWER PLANTS
HEAT TRANSFER
LIGNITE
MATERIALS TESTING
MATHEMATICAL MODELS
NATURAL GAS
NITROGEN OXIDES
SUBBITUMINOUS COAL