Abstract
A plasma model of thermochemical preparation for the combustion of pulverized coal implemented through the PlasmaKinTherm program for the calculation of plasma-fuel systems has been described. Such systems are used at nonfuel-oil start-up of boilers and the stabilization of the combustion of a pulverized coal torch. The model combines kinetic and thermodynamic methods describing the process of the thermochemical preparation of fuel in the volume of the system. The numerical study of the regime parameters of the plasma-fuel system as a function of plasmatron power providing the ignition of the high-ash coal air-petrol mixture is carried out. Distributions of temperatures and velocities of gas and coal particles and concentrations of products of the thermochemical preparation over the length of the system are obtained. The main regularities of the process of the plasma ignition of fuel are revealed consisting in the displacement of the maxima of temperatures and velocities of products of thermochemical preparation upstream (in the direction of the plasmatron), and the independence of plasmatron power maximal values of temperatures and velocities. The results of calculations are compared with experimental data confirming the validity of assumptions accepted at the development of the model.
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Original Russian Text © A.V. Messerle, V.E. Messerle, A.B. Ustimenko, 2017, published in Teplofizika Vysokikh Temperatur, 2017, Vol. 55, No. 3, pp. 366–374.
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Messerle, A.V., Messerle, V.E. & Ustimenko, A.B. Plasma thermochemical preparation for combustion of pulverized coal. High Temp 55, 352–360 (2017). https://doi.org/10.1134/S0018151X17030142
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DOI: https://doi.org/10.1134/S0018151X17030142