Wojtasik-Malinowska Justyna, Jaskulski Maciej, Jaskulski Marcin
Department of Environmental Engineering, Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska st. 213, 90-924, Lodz, Poland.
Faculty of Geographical Sciences, Institute of Urban Geography, Tourism Studies and Geoinformation, University of Lodz, Kopcinskiego st. 31, 90-142, Lodz, Poland.
Environ Sci Pollut Res Int. 2022 Oct;29(47):71857-71870. doi: 10.1007/s11356-022-20859-x. Epub 2022 May 23.
Rotating packed bed (RPB) is a promising technology which can be used to intensify mass transfer in absorption processes. A better understanding of fluid dynamics is crucial to fill the gap in fundamental knowledge. Raising awareness on new technology and creating rules for process design and control are also very important. The experimental investigation of fluid in rotating beds is a very complex and difficult issue. What is more, the knowledge of the phase behavior in an RPB device is still insufficient. Therefore, an CFD (computational fluid dynamics) simulation is proposed as a tool for the study of gas phase flow inside porous packing. This study presents a three-dimensional numerical model for two fluid models: k-ε and RNG k-ε, for predicting dry pressure drop. The obtained simulation outcome was compared with the experimental results. The experimental dry pressure drop for porous packing was investigated for rotational speed in the range from 150 rpm to 1500 rpm and compared to the results from the CFD model. The comparison between the experimental and simulation results indicates very good consistency for the entire range of the rotational speed of interest. CFD modelling is recognised as an adequate tool leading to the better understanding of gas phase behaviour inside an RPB, filling an essential gap in our knowledge of the hydrodynamics of rotating packing, which allows to improve the design and performance of the process in RPB in terms of minimizing energy and material consumption.
旋转填充床（RPB）是一种很有前景的技术，可用于强化吸收过程中的传质。更好地理解流体动力学对于填补基础知识空白至关重要。提高对新技术的认识并制定过程设计和控制规则也非常重要。旋转床中流体的实验研究是一个非常复杂且困难的问题。此外，关于旋转填充床装置中相行为的知识仍然不足。因此，提出将计算流体动力学（CFD）模拟作为研究多孔填料内气相流动的工具。本研究针对两种流体模型（k-ε 和RNG k-ε）提出了一个三维数值模型，用于预测干压降。将获得的模拟结果与实验结果进行了比较。研究了多孔填料在150转/分钟至1500转/分钟转速范围内的实验干压降，并与CFD模型的结果进行了比较。实验结果与模拟结果之间的比较表明，在整个感兴趣的转速范围内具有很好的一致性。CFD建模被认为是一种合适的工具，有助于更好地理解旋转填充床内的气相行为，填补我们在旋转填料流体动力学知识方面的重要空白，从而能够在最小化能源和材料消耗方面改进旋转填充床过程的设计和性能。
