Heat and mass transfer of drops of concentrated solutions during spray dehydration under conditions of convective-radiation energy supply

The results of modeling the dehydration drops a concentrated liquid, on example ceramics, with convective-radiation energy supply under conditions direct-flow and counter-current phase motion, as well pulsed counter-flows gas, are presented. A model for single drop is formulated based equations heat conduction source term diffusion moisture, taking into account change in its size due to evaporation. This takes influence convective vapor flow from evaporating droplet surface (Stefan flow), blowing hot gas transfer coefficient (Spalding correction). impact infrared radiation described by Bouguer equation. equation motion forces gravity, difference velocities densities. As result numerical simulation, it was found that countercurrent movement, intensity higher than cocurrent flow. both an increase relative velocity phases residence time intense region radiation. It shown further intensification evaporation possible creation counter flows. calculated compared experimental data, which confirms adequacy model. study can be useful development new technologies devices solutions suspensions.