Computational study of the processes of pulverized coal oxygen combustion in a vortex burner
V.A. Kuznetsov1,2, D.M. Bozheeva2, A.A. Dekterev1,2, A.V. Minakov1,2
1Siberian Federal University, Krasnoyarsk, Russia
2Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: oxygen combustion, vortex burner, aerodynamics, heat transfer, mathematical simulation
Abstract
Numerical studies of aerodynamics and heat transfer in a vortex burner during flame oxygen combustion of pulverized coal are presented. The proposed numerical method has been tested using experimental data on oxygen combustion of coal in a flow. The influence of oxygen concentration in the blast on the processes of ignition and combustion of coal dust in a nitrogen-free environment has been considered. It has been established that for the burner under study, an increase in oxygen concentration from 40.1 to 66.7 vol. % leads to a change in the flow structure, an extension of the flame size, and an increase in the average value of unburned solid carbon concentration from 0.00136 to 0.4 g/m3 at a distance of 1.5 m from the burner.
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