Application of Theoretical and Experimental Findings for Optimization of Mixing Processes and Equipment

Processes

Dita Jiroutová¹  Tomáš Jirout² 

[1] Department of Experimental Methods, Klokner Institute, Czech Technical University in Prague, Šolínova 7, 166 08 Prague 6, Prague, Czech Republic;Department of Process Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Prague, Czech Republic;

关键词: mixing;    agitator;    blending;    pumping capacity;    particle suspension;    impeller efficiency;   

DOI  :  10.3390/pr8080955

来源: DOAJ

【 摘 要 】

The homogenization of the agitated batch and ensuring the suspension of particles are the most frequently encountered requirements in terms of mixing applications. These operations are affected by the flow of the agitated batch. The geometrical parameters of the mixing system, especially the shape of the agitator blade, affect flow and circulation in the agitated batch. The present work provides a general description of the most common processes in the agitated batch (blending and particle suspension), hydrodynamic parameters (flow in agitated batches, pumping and circulation capacity of impellers) and the geometrical configurations of the mixing equipment (shape of vessel, baffle and impeller, and their mutual arrangement) that influence the process. The dimensionless process characteristics of the agitator were derived by theoretical analysis. These characteristics were applied to evaluate an extensive set of experimental data with various geometric configurations of the mixing equipment. This study shows how the flow in the agitated batch, caused by the pumping and circulating effects of the agitators, affects the parameters and energy efficiency of these processes, depending on the geometric configuration of the mixing equipment. Moreover, the benefits of the hydrofoil impellers used for these mixing processes are presented.

【 授权许可】

Unknown