Mitigating gas maldistribution in a cross-flow rotating packed bed via optimizing guide baffle structures

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-04-09 DOI:10.1016/j.cep.2025.110317

Yi-Hang Xu , Han-Zhuo Xu , Yan-Bin Li , Guang-Wen Chu , Jian-Feng Chen

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Abstract

A cross-flow rotating packed bed (CF-RPB) is a promising solution for offshore gas purification applications. In this work, gas flow fields and maldistribution phenomena were investigated via three-dimensional Computational fluid dynamics (CFD) simulations inside the CF-RPB. Relative error of simulation results within ±10 % compared to experimental pressure drop. The results of contours and streamlines showed that disturbed flow paths resulted from asymmetry of internal structures gave rise to gas maldistribution. Three baffles were proposed to guide gas upward flow, including the baffle with straight blades (BSTB), the baffle with spiral blades (BSPB), and the single-turn louvre baffle (SLB). After systematically compared the gas distribution characteristics for different baffle types and parameters, the preferred baffle was SLB with δ_B/R_C = 0.0146, γ = 45°, n = 5, and H_B/H_P = 0.040. The SLB could drastically reduce total maldistribution by 29.49 % while incurring a modest pressure drop increase of 12.69 % compared to the original structure, indicating effectiveness of baffle in resolving gas maldistribution inside the CF-RPB for offshore application.

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通过优化导流挡板结构缓解交叉流旋转填料床中的气体不均匀分布

交叉流旋转填料床（CF-RPB）是一种很有前途的海上气体净化解决方案。本文通过计算流体力学（CFD）的三维模拟研究了CF-RPB内部的气体流场和不均匀分布现象。仿真结果与实验压降的相对误差在±10%以内。等高线和流线的计算结果表明，由于内部结构的不对称而引起的流道扰动导致了气体的不均匀分布。设计了直叶挡板（BSTB）、螺旋叶片挡板（BSPB）和单转浮叶挡板（SLB）三种导气挡板。通过系统比较不同挡板类型和参数的气体分布特性，优选出δB/RC = 0.0146, γ = 45°，n = 5, HB/HP = 0.040的SLB挡板。与原始结构相比，SLB可以大幅减少29.49%的总不均匀分布，同时产生的压降增加了12.69%，这表明挡板在解决CF-RPB内部气体不均匀分布方面的有效性，可用于海上应用。

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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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.