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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Mass transfer analysis of spinning cone columns using cfd
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Mass transfer analysis of spinning cone columns using cfd

机译：传质分析旋转锥列利用cfd

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The mechanisms of liquid-gas mass transfer in spinning cone distillation columns (SCC) have been investigated in a pilot-scale SCC with an inner diameter for the column shell of 0.148m,a rotational speed of 500 rpm,and gas and liquid flow rates of up to 500 and O.SLmin~(-1),respectively.The actual three-phase flow system (the continuous liquid film,the dispersed liquid droplets,and the gas) has been modelled using an Eulerian two-phase (the dispersed liquid and the gas) CFD model of the column with the geometry and the boundary conditions based on consideration of all three phases.The analysis is directed towards the comparative evaluation of the film and the spray-related mass-transfer coefficients and the comparison of these with the measured values.The results show that the film mass-transfer coefficient is nearly constant over the whole practical range of fluid flow rates and that it is clearly insufficient to explain the experimental data.In contrast,the spray mass transfer coefficient rises steadily and,at the onset of the loading regime,it exceeds its film-related counterpart by an order of magnitude.Both the trend and the absolute value of the spray mass transfer coefficient match the observed values very well.Implications of these findings for the possible optimization of SCC design and operation are discussed.
机译：气液传质机制旋转锥蒸馏塔(SCC)在半工业规模的SCC的调查柱壳的内径0.148米,500转的转速,气体和液体流率高达500分别O.SLmin ~(1)。流系统(连续液膜,分散的液滴和气体)使用一个欧拉两相(模仿分散的液体和气体)的CFD模型列与几何形状和边界基于考虑这三个条件阶段。比较和评价的电影spray-related和传质系数这些与测量值的比较。结果表明,膜质在整个系数几乎是常数实际流体流速和它的范围显然不足以解释实验数据。传递系数稳步上升,并在开始加载制度,它超过了它film-related对应的订单大小。喷雾质量传递系数的匹配观测值很好。研究结果为鳞状细胞癌的可能的优化设计和操作进行了讨论。

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