Investigation of the spraying mechanism and combustion of the suspended coal fuel

This paper continues the earlier one [1]. It presents the results of the suspended coal fuel spraying with pneumo-mechanical sprayers followed by the fuel combustion in a vortex furnace. It is shown that, during the spraying, two qualitatively different systems of drops are forming. The first one with the “drops” diameter above 80 - 100 mm is presented by coal particles, the other - by water-coal drops. Different dynamics of temperature variation of the coal particle and WCF drops during their combustion is founded. The residence time of the burning particles and WCF drops in the vortex furnace is proportional to their diameter, which permits to provide their effective burn-off