The Influence of the Oxidizer Composition on the Autoignition Time of a Stream of Droplets of Coal-Water Suspension
V. A. Kuznetsov, D. M. Bozheeva, A. V. Minakov
Siberian State University, Krasnoyarsk, Russia
Keywords: induction period, autoignition, coal-water slurry (CWS), laboratory rig, oxy-drip combustion
Abstract
The development of advanced technologies, such as oxy-drip-torch combustion, will solve a number of problems and improve the environmental situation associated with the combustion of hydrocarbon fuels (including waste) at power plants. In this study, experiments were conducted on a laboratory rig to study the autoignition of droplets of coal-water slurry in a tubular reactor. The dependence of the ignition induction period on the oxygen and carbon dioxide concentrations under adiabatic conditions was investigated. It was shown that increasing the O2 concentration by 1% (volume) reduces the ignition time by 5.14% under the experimental parameters considered. It was found that increasing the CO2 concentration in the flow at the same oxygen concentration does not significantly affect the ignition time under these conditions.
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