CFD Study of a Pulverized Coal Boiler

Numerical simulation of pulverized coal combustion is carried out in order to investigate the behavior of the dispersed phase. Combustion is done in a combined cycle unit (a coal-fired boiler) coupled with a gas/oil-fired turbine. Results are presented for laboratory scale burner SCO (Single Central Orifice) type. Combustion is performed in atmospheric air conditions. Coal particle trajectories are analyzed to capture Gas-particle interaction within a turbulent flow. An Eulerian-Lagrangian combustion approach is chosen. A reduced reaction mechanism is used to describe coal combustion in the furnace. Particle transport, heating and devolatilization, char combustion involving heterogeneous kinetic reaction and heterogeneous combustion are modeled. These models are combined with a finite rate/eddy dissipation model to describe turbulence chemistry interaction. Results are compared against previous data produced by researcher Godey et al. experimental data.