齐放,张一敏,薛楠楠,刘涛,黄晶.含钒页岩搅拌浸出槽结构优化的数值模拟[J].有色金属(冶炼部分),2019(3):49-55.
含钒页岩搅拌浸出槽结构优化的数值模拟
Numerical Simulation of Structure Optimization of Stirring Leaching Tank for Extractive Hydrometallurgy of Vanadium
投稿时间:2018-11-23  修订日期:2018-11-25
DOI:doi:10.3969/j.issn.1007-7545.2019.03.012
中文关键词:  搅拌槽  计算流体动力学  数值模拟  优化  混合
英文关键词:stirring leaching tank  computational fluid dynamics  numerical simulation  optimization  mixing
基金项目:国家自然科学基金资助项目(51474162,51774215,51774216)
              
作者单位
齐放 武汉科技大学 资源与环境工程学院
张一敏 武汉科技大学 资源与环境工程学院
薛楠楠 武汉科技大学 资源与环境工程学院
刘涛 武汉科技大学 资源与环境工程学院
黄晶 武汉科技大学 资源与环境工程学院
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中文摘要:
      基于Fluent流体力学软件,采用标准k-ε湍流模型、欧拉-欧拉多相流模型、多重参考系稳态算法,通过改变搅拌槽内搅拌桨层数、桨叶层间距以及下层桨叶距底高度,对搅拌槽内固液两相流动过程进行优化与改进模拟研究。结果表明,增加搅拌桨层数能明显改善液面流速“死区”范围,整个槽内流体混合更加剧烈;桨叶层间距在0.33 D~0.53 D(D为搅拌槽内径)时,流体流型以合并流为主,能够加强固液之间的接触碰撞和两相间充分混合;下层桨叶距底高度为0.13 D~0.23 D时,可以有效缓解固体颗粒在槽底沉积问题,促进固体颗粒有效分散。
英文摘要:
      Based on Fluent fluid dynamics software, standard k-ε turbulence model, Euler-Euler multiphase model and multi-reference frame method of steady-state flow were applied to simulate solid-fluid two-phase flow field of stirring leaching tank by changing number of impeller layers, blade layer spacing and distance of impeller from the bottom. The results show that increasing number of impeller layer can obviously improve the "dead zone" range of liquid velocity, and fluid mixing in the whole tank is more intense. When blade spacing is 0.33 D~0.53 D (D is inner diameter of leaching tank), main fluid flow pattern is confluence flow which the contact collision between solid and liquid can be strengthened and the two phase flow can be fully mixed. When height of lower blade from bottom is 0.13 D~0.23 D, it can effectively alleviate the problem of solid particles deposition at bottom of groove and promote effective dispersion of solid particles.
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