Evolution of a droplet medium in a plasma-chemical reactor

Abstract

We modeled the plasma-chemical method of obtaining finely disperse powders by thermochemical decomposition of liquid pulverized reagents in a high-temperature heat-transfer agent in a column-type direct-flow cylindrical reactor. We consider the processes of working body motion in the reactor cavity and of thermochemical decomposition of the original solution droplets, evaporation of volatile components, and of the formation of a solid residue. The simulation of gas dynamics was made using the Reynolds equations; turbulent stresses were determined with the aid of the k–e model. In describing the formation of the solid residue, we took into account the processes of heating and evaporation of droplets, diffusion, crystallization, and of salt thermolysis in the formation of the needed structure of particles. An analysis of the results of numerical simulation of various operating conditions of the reactor is performed.