CFD Modelling of an 850 kW Injection Furnace to Investigate NOx Emissions

This research investigates NOx emissions during biomass combustion in an 850 kW injection furnace. Employing CFD modeling via ANSYS Fluent software, the study explores the impact of primary and secondary air, flue gas recirculation, and stoichiometry on NOx and precursor formation. Optimal air-staging ratios exhibit the potential for reducing emissions. Contrary to expectations, higher flue gas recirculation subtly increases NO formation in the simulation model. A comparison with experimental data shows an overestimation in NO concentrations, while ratios of NH3/NO meet the actual conditions, emphasizing the need for refined computational models to mirror absolute values accurately. Overall, this study helps to understand the relationship between combustion parameters and NOx emissions for the presented injection furnace and provides valuable insights for further design options for more efficient and environmentally conscious combustion. Further refinement and validation of the simulation model is necessary in order to develop design strategies for effective NOx reduction.     «

This research investigates NOx emissions during biomass combustion in an 850 kW injection furnace. Employing CFD modeling via ANSYS Fluent software, the study explores the impact of primary and secondary air, flue gas recirculation, and stoichiometry on NOx and precursor formation. Optimal air-staging ratios exhibit the potential for reducing emissions. Contrary to expectations, higher flue gas recirculation subtly increases NO formation in the simulation model. A comparison with experimental da...     »