Optimizing the energy efficiency of the chemical and energy engineering process of drying of a moving dense multilayer mass of phosphorite pellets

Abstract

Conceptual and mathematical formulations were developed for the problem of optimizing the chemical and energy engineering process (CEEP) of drying of a moving dense multilayer mass of phosphorite pellets in a complex chemical and energy engineering system (CEES)—travelling grate machine—as a discrete dynamic programming problem. A criterion of the efficiency of the drying CEEP was taken to be the minimum of the cost of the heat and power consumed in the drying CEEP. The obtained results of solving the optimization problem were applied to calculate the characteristics of the energy efficiency of the drying of pellets in the CEES. It was determined that, under the optimal conditions of the drying of the moving multilayer mass of pellets, there is no overmoistening zone, the heat- and moisture-transfer processes are intensified, the power consumption reduces, and the quality of the final product increases.