Simprosys is software package specifically designed for the heat and mass balance calculations of drying process and combined evaporation and drying process. It is also a very efficient tool for the design, evaluation and troubleshooting of drying systems as well as dryers and burners. Simprosys can deal with not only Water-Air system, but also many other typical Solvent-Gas systems for industrial drying. Simprosys can model and simulate combustion drying.