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    题名: CFD Study on the Effect of Hydrocyclone Structure on the Separation Efficiency of Fine Particles
    作者: 黃國楨;Hwang, Kuo-jen;Wu, Wen-hao;Qian, Shaoxiang;Nagase, Youichi
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: CFD;hydrocyclone;particle classification;separation efficiency
    日期: 2008-11-01
    上传时间: 2010-08-09 18:15:57 (UTC+8)
    出版者: Taylor & Francis
    摘要: Effects of geometric structure parameters of 10 mm-diameter hydrocyclones on the particle separation efficiency are studied using computational fluid dynamics (CFD). The fluid velocity profiles and particle trajectories are simulated using RFLOW software with a standard isotropic k-ε turbulent model. The JIS standard CaCO3-17 particles are adopted as a particulate sample in simulations and experiments. Comparing the simulated results with experimental data, a maximum deviation about 20% in partition curves occurs for 5-10 µm particles. However, fairly good agreements for the cut-size predictions and the fish-hook phenomenon are obtained. The simulated cut-size d50 is only 2 µm larger than that measured in experiments, while the value of d100 can be accurately predicted. An increase in overflow diameter or a decrease in underflow diameter leads to a lower separation efficiency but a clearer separation sharpness due to lower fluid underflow rate. A short-and-wide rectangular inlet is more efficient for particle separation than a tall-and-narrow one. An inclined inlet conduit plays an inessential role on the efficiency improvement but gains a 2 µm reduction in d100. Comparing the simulated results, the hydrocyclone used in the experiments of this study exhibits a higher separation sharpness than the Rietema type and a higher efficiency than the Bradley type based on the same operation capacity and hydrocyclone size.
    關聯: Separation Science and Technology 43(15), pp.3777-3797
    DOI: 10.1080/01496390802286637
    显示于类别:[化學工程與材料工程學系暨研究所] 期刊論文


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