Modeling and optimization of coal and coal-water slurry reburning for NOx emissions reduction
Conference
·
OSTI ID:20082297
The performance of coal and coal-water slurry as reburn fuels in a pilot scale 0.5 MM Btu/hr Down-fired combustor (DFC) was predicted using numerical simulations and compared with measurements. Previous low NOx level burner modeling results have been used together with the whole-furnace design approach. Flow and combustion parameters, fuels and firing configurations and reburning parameters are studied and optimized for maximum NOx reduction performance. Comparisons are made between coal and coal-water slurry and biomass as reburn fuels. A sensitivity analysis was conducted in order to analyze the variation of predictions with respect to model parameters. Modeling results show that improved mixing, burner aerodynamics and flame attachment can contribute significantly to lowering the primary zone NOx levels. This fact, coupled with optimized reburning parameters can result in important NOx emissions reduction. Different scenarios are discussed and recommendations are made for maximum NOx reduction efficiency.
- Research Organization:
- The Pennsylvania State Univ., University Park, PA (US)
- DOE Contract Number:
- FC22-92PC92162
- OSTI ID:
- 20082297
- Country of Publication:
- United States
- Language:
- English
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