化工进展2017，Vol.36Issue(3)：823-831,9.DOI:10.16085/j.issn.1000-6613.2017.03.008
基于液体弥散理论的规整填料塔液体扩散数值模拟
Numerical simulations of liquid spreading in structured packed column based on liquid dispersion
摘要
Abstract
It is of great theoretical importance to study on liquid dispersion in structured packed columns in the design of liquid distributing devices,the height of the packed beds and the optimum choice of packing types. However,the theoretical description and mathematical model about liquid dispersion are limited. In order to predict liquid spreading in packed column accurately,the liquid dispersion mechanism was introduced. The porous media model was used to simplify the complex structured packing geometry to a homogeneous porous material and a 2D axisymmetric CFD model considering mechanical dispersion force,inter-phase drag force and porous resistance force was presented. The numerical simulations were in good agreement with the experimental results. Then,the effects of liquid spreading factorS,gas inlet velocity and liquid inlet velocity on liquid flow distribution were analyzed. Mechanical dispersion played a key role in liquid dispersion and capillary dispersion can be neglected. Liquid spreading factor and liquid inlet velocity were crucial to liquid distribution in packed columns and the best radioS/Dr was 2. However,gas inlet velocity will not impact liquid distribution in packed column. This study demonstrated its great importance in the numerical simulations in structured packed columns filled with other packing types.关键词
规整填料/气液两相流/液体弥散/扩散系数/多孔介质/数值模拟Key words
structured packing/gas-liquid flow/liquid dispersion/spreading factor/porous media/numerical simulation分类
化学化工引用本文复制引用
张梦娴,李玉星,韩辉,朱建鲁,常学煜..基于液体弥散理论的规整填料塔液体扩散数值模拟[J].化工进展,2017,36(3):823-831,9.基金项目
国家自然科学基金(51504278)、山东省优秀中青年科学家科研奖励基金(BS2014ZZ009)、青岛市应用基础研究计划(14-2-4-81-jch)及中央高校基本科研业务费专项资金(16CX02003A)项目. （51504278）
