Obtaining of Multilayer Granules in a Vortex Gas Flow: Automated Complex for Technological Calculation

The article describes theoretical bases of the process of obtaining multilayer granules and mathematic model for software realization. The program Multilayer Granules^® that carries out technological calculation of the solution for the filming process of the granule surface, is represented in the article. The optimal construction of the vortex granulator is achieved, based on technological calculation results of the granulating process and hydrodynamic calculations, using the computer modeling (based on the author’s model for calculating the hydrodynamic conditions of gas flow and granules movement, classification and separation processes of granules in a vortex granulator, kinetics of granules heating and removing moisture from the granules). The calculation results become the base for vortex granulators engineering calculation methodology to obtain the multilayer granules. The work shows industrial application of the investigated software products – production of the porous ammonium nitrate (PAN). A porous multilayer granules sample, obtained in the vortex granulator, is demonstrated in the article. Multilayer Granules^® allows conducting optimization of vortex granulator calculation according to the criteria of minimum required residence time of granules in device workspace.