Process Design of a Multistage Drying Process via Flowsheet Simulation

Abstract

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.Multistage drying processes including spray drying and fluidized bed unit operations are challenging to design due to the dependencies of the preceding process steps. Flowsheet simulation offers the possibility to simulate a complete process by the application of suitable short-cut models. In this contribution a novel model for a spray dryer based on a population balance approach is presented. Furthermore, a dynamic model for a fluidized bed dryer is introduced. Experimental data is used for validation and parameter optimization. The calibrated models are then used to design an industrial drying process of multiple drying stages.

Eulerian-Lagrangian simulation of wood flour and wind distribution during the impulse-cyclone airflow drying process

“…Previous studies on wood flour drying systems primarily focused on a single component, e.g., the impulse dryer, cyclone dryer, or double-cyclone dryer (Jamaleddine and Ray 2011;Alavi et al 2018). However, the movement of particles between various components has a very strong coupling relationship (Buchholz et al 2021). For example, the strong gassolid turbulence in an impulse dryer would change the discharge efficiency of a cyclone dryer (Gao et al 2019).…”