An internal circulation rotating packed bed for green chemical engineering: structure optimization of liquid lifter

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering Pub Date : 2025-05-30 DOI:10.1016/j.gce.2025.05.008

Zi-Lun Li , Liang Zheng , Li-Hua Wang , Yi-Qian Wei , Hai-Long Liao , Guang-Wen Chu , Yong Luo , Jian-Feng Chen

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Abstract

The internal circulation rotating packed beds (IN-RPBs) have been widely used in multiphase systems. However, its key component's liquid lifter suffers from the liquid lifting rate (Q_L), limiting the micro-mixing and mass transfer efficiency. In this study, the fluid motion inside the conventional lifter was theoretically analyzed. Based on the above theoretical analysis, a new impeller-equipped lifter was innovatively designed for the IN-RPB to enhance Q_L. Experiment results showed that Q_L was increased by 100% at 1400 r/min within the impeller-equipped lifter. Numerical simulations demonstrated that the flow field was altered in the impeller-equipped lifter, promoting the generation of vortices, thereby increasing the Q_L. Mass transfer experiments demonstrated that the structure optimization of the lifter led to a 60% increase in the gas-liquid volumetric mass transfer coefficient (k_La). This study provides a basis for the industrialization of the IN-RPB with an impeller-equipped lifter.

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绿色化工用内循环旋转填料床：提液器结构优化

内循环旋转填料床（in - rpbs）在多相系统中得到了广泛应用。然而，其关键部件升液器受升液率（QL）的影响，限制了微混合和传质效率。本文从理论上分析了传统提升机内部的流体运动。在上述理论分析的基础上，为IN-RPB创新设计了一种新的叶轮式提升器来提高QL，实验结果表明，在1400 r/min时，叶轮式提升器内的QL提高了100%。数值模拟结果表明，叶轮式升力器内的流场发生了改变，促进了涡流的产生，从而提高了QL。传质实验结果表明，结构优化后的升力器气液体积传质系数（kLa）提高了60%。本研究为叶轮式提升机IN-RPB的工业化生产提供了依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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