组合导向浮阀塔板的CFD 模拟及反向流分析 - 化工学报.PDF

第67 卷 第5 期 化 工 学 报 Vol.67 No.5 May 2016 2016 年5 月 CIESC Journal ·1701 · 组合导向浮阀塔板的 CFD 模拟及反向流分析 刘江琳，张杰旭，纪利俊，陈葵，武斌，吴艳阳，朱家文 （华东理工大学化工学院，上海 200237 ） 摘要：精馏塔板上的气液两相流动对传质效率有重要影响。根据实验数据拟合得到平均气含率关联式，将其加入 动量源项，采用Fluent 软件对1.2 m 直径的组合导向浮阀塔板上的气液两相流动进行CFD 模拟，考察了塔板上的 气液两相流动状况。清液层高度的模拟结果与实验数据关联式相吻合，验证了模拟的正确性。对塔板上液相的非 理想流动进行了分析，通过对反向流进行量化和统计计算出反向流体积分数（即反向流体积占塔板总体积的百分 比）。3 块不同浮阀排布塔板的反向流体积分数时均值的计算结果表明，梯形浮阀和矩形浮阀的排布方式对反向流 影响很大，通过合理排布能够使工业塔板的反向流体积分数时均值从22.0%下降到19.4%，降幅达到11.8%。本研 究结果可望对塔板的设计和优化提供指导。 关键词：气液两相流；计算流体力学；组合导向浮阀；反向流；优化 DOI ：10.11949/j.issn.0438-1157 中图分类号：TQ 021.1 文献标志码：A 文章编号：0438—1157 （2016 ）05—1701—09 CFD simulation and backflow analysis of combined directed valve tray LIU Jianglin, ZHANG Jiexu, JI Lijun, CHEN Kui, WU Bin, WU Yanyang, ZHU Jiawen (College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China) Abstract: The flow patterns and hydraulics of gas-liquid flow on a commercial scale distillation tray is of great importance in determining the tray efficiency. Based on experimental data, a new correlation of average gas hold-up was fitted and built in the inter-phase momentum transfer source for CFD simulations. The simulations of combined directed valve trays of 1.2 m air-water system were carried out by Fluent, a commercial CFD software, and the flow pattern characteristics was investigated. The clear liquid height determined from CFD simulations was in good agreement with the predicted results calculated from th