文献类型：期刊文献

英文题名：Structure optimization of axial-flow hydrocyclone improves the separation accuracy of oil droplets

作者：Wang, Yawen[1];Liu, Qilong[1];Ding, Guili[2];Li, Lin[1];Yang, Qiang[1];Lu, Hao[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Sinolight Surfactants Technol Co Ltd, Shanghai, Peoples R China

年份：2025

卷号：318

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20252818773999);WOS:【SCI-EXPANDED(收录号:WOS:001538607800001)】；

基金：This work is financially supported by National Natural Science Foundation of China (Grant No. 52370077) and Shanghai Rising-Star Program (Grant No. 22QA1402600) .

语种：英文

外文关键词：Axial hydrocyclone; Oil-water separation; Swirl intensity; Structure optimization; Fine oil droplets

摘要：This study presents a novel axial-flow hydrocyclone design with optimized structural parameters to significantly improve the separation efficiency of fine oil droplets (17-40 mu m) in low-concentration oily sewage. Through computational fluid dynamics (CFD) and population balance model (PBM) simulations, we systematically investigated the effects of three key parameters: taper ratio (T-r), column diameter ratio (C-dr), and oil-collecting pipe length (O-cp). The results demonstrate that a taper ratio of 1/30 minimizes axial swirl intensity attenuation to 11.11 %, while a column diameter ratio of 20 provides optimal residence time for droplet migration. The introduction of a 90-mm oil-collecting pipe enhances oil-core stability without excessive pressure drop. Experimental verification confirmed that the optimized hydrocyclone achieves 65 % separation efficiency for 17-40 mu m droplets (a 15 % improvement over previous designs) and 87 % for droplets >40 mu m. These quantitative improvements address a critical limitation in conventional hydrocyclones and provide an effective solution for fine oil droplet separation in industrial applications.