结构参数对新型海水预处理反旋转水动力空化反应器空化性能的影响

IF 8.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Licheng Xue , Wanlong Ren , Jinhan Liu , Gang Liu , Yue Wang , Haiyan Bie , Zongrui Hao
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引用次数: 0

摘要

提出了一种应用于海水反渗透淡化的基于水动力空化技术的海水预处理新方法,并在此基础上设计了逆旋转水动力空化反应器(HCR)。采用高速摄像实验和数值模拟相结合的方法研究了逆旋转HCR内空化的流动特性。研究发现,在斜齿转子的发展演变过程中,斜齿转子的尖端空化伴随着尾流的脱落。此外,还详细研究了空化诱导关键部件斜齿转子和平齿转子的结构参数对空化性能的影响。分析了转子相互作用间隙、平齿转子槽数、斜齿转子倾角等因素对空化产生效率的影响。结果表明,当相互作用间隙为1 mm、槽数为13、倾角为8°~ 8°时,反向旋转的HCR获得了最佳的空化性能。最后,通过大肠杆菌灭活实验对反向旋转HCR的消毒性能进行评价。结果表明,该空化装置具有较高的消毒性能。此外,自由基对大肠杆菌的失活作用较弱,而空化塌陷引起的强剪切应力主要破坏大肠杆菌的细胞结构,这一点也得到了扫描电镜的证实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of structural parameters on cavitation performance of a novel counter-rotating hydrodynamic cavitation reactor for seawater pre-treatment
A new seawater pretreatment method based on hydrodynamic cavitation technology applied to seawater reverse osmosis desalination was proposed, based on which a counter-rotating hydrodynamic cavitation reactor (HCR) was designed. A combination of high-speed camera experiments and numerical simulations was used to investigate the flow characteristics of cavitation within the counter-rotating HCR. It is found that the cavitation at the tip of the oblique-tooth rotor was accompanied by wake vortex shedding during the development and evolution. Besides, the effects of structural parameters of the cavitation-inducing key components, the oblique-tooth rotor and the flat-tooth rotor, on the cavitation performance were investigated in detail. The cavitation generation efficiency was analyzed for various interaction gaps of the rotor, the number of grooves of the flat-tooth rotor, and the inclination angle of the oblique-tooth rotor. The results show that the counter-rotating HCR with an interaction gap of 1 mm, a groove number of 13, and an inclination angle of 8°-8° obtained the optimal cavitation performance. Finally, the disinfection performance of counter-rotating HCR was evaluated by E. coli inactivation experiment. It is found that the cavitation device has high disinfection performance. Moreover, the inactivation effect of free radicals on E. coli was weak, while the strong shear stress caused by cavitation collapse mainly damaged the cell structure of E. coli, which was also verified by Scanning Electron Microscope.
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来源期刊
Desalination
Desalination 工程技术-工程:化工
CiteScore
14.60
自引率
20.20%
发文量
619
审稿时长
41 days
期刊介绍: Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.
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