Mathematical modeling of the structure of mixing of the solid phase in the apparatus of a fountaining layer with an additional input of a heat carrier

Abstract

Relevance. The drying process is one of the most energy-intensive stages in industrial production, especially when processing high-moisture and polydisperse materials prone to clumping. In this context, spouted bed devices are an effective solution that provides intensive heat and mass transfer due to active hydrodynamic modes. Their use allows minimizing lump formation and increasing drying efficiency even at high temperatures. However, certain design and operational limitations prevent the widespread use of these devices, which requires the development of energy-efficient and high-performance modifications.

These drawbacks are eliminated in an energy-efficient and high-performance spouted bed device with additional coolant inputs.

Aim: Mathematical description of the structure of solid phase mixing in a spouted bed device with additional coolant inputs and bringing analytical solutions to the engineering calculation of drying units.

Methods: A combined hydrodynamic model of the particle motion structure is used to describe the hydrodynamics of solid phase motion in a spouting bed apparatus with additional coolant inputs.

Results. An equation for the response curve of a combined hydrodynamic model for a spouting bed apparatus with additional coolant input is obtained, characterizing the structure of solid phase motion.