Efficiency of plasma technology for preparing solid fuels for combustion combustion
DOI:
https://doi.org/10.18321/cpc22(3)169-178Keywords:
plasma preparation for combustion, solid fuel, combustible two-phase fuel, plasma-coal burner, numerical study, experimentAbstract
A thermodynamic analysis was performed, which made it possible to find the operating parameters of plasma technology for preparing solid fuels for combustion. Kinetic calculations of plasma ignition and stable combustion of a pulverized coal torch were performed using the PlasmaKinTherm program. Profiles of temperatures, velocities and concentrations of combustible gas and coal particles along the length of the reaction zone of a plasma-coal burner were obtained. In experiments on plasma preparation of thermal coal for combustion, stable ignition of a pulverized coal torch was obtained, the temperature and composition of the resulting highly reactive two-component fuel were measured, and the degree of carbon conversion of high-ash Ekibastuz coal was determined. A comparison of the results of experiments and calculations showed acceptable agreement. It has been shown that the main product of plasma ignition and stabilization of coal combustion is a highly reactive two-component fuel, and the harmful emissions concentrations, nitrogen and sulfur oxides, are two orders of magnitude lower than in thermal power plants’ flue gases.
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