Numerical Investigation of Different Burner Arrangement on a Coal-Fired Boiler

Numerical simulation of combustion process in a 200 MW coal-fired boiler is performed using CFD software. The work is focused on concentrate-lean burner, which arranges with different horizontal tilts and the air-staging technique. The numerical simulations on the regular burner have been validated with the experiment data. The other simulation results using the same models could be considered for the future reconstruction. Results show that 'Coal burner' itself may only achieve 10-20% NO reductions without changing burner arrangement; air staging is a very effective way to reduce NO; changing horizontal tilts may achieve less than 10% -20% NO reductions, and it may be more effective after air staging.