化工系统蒸馏塔板气液并流流场优化设计  

Optimization Design of Gas-Liquid Flow in Chemical System Distillation Tray

作　　者：刘琛 王晋刚 唐猛[1] 张少峰[1] LIU Chen;WANG Jin-gang;TANG Meng;ZHANG Shao-feng(Chemical Engineering Institute,Hebei University of Technology,Tianjin 300130,China;School of Oceanographic Sciences and Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学化工学院,天津300130 [2]河北工业大学海洋科学与工程学院,天津300130

出　　处：《计算机仿真》2019年第1期250-254,372,共6页Computer Simulation

基　　金：国家自然科学基金项目(NO.21776055);河北省研究生创新资助项目(CXZZBS2017030)

摘　　要：蒸馏塔板气液流场的优化设计是提高塔板效率和蒸馏设备生产能力的关键。对于立体旋流塔板,实验方法难以测量塔板内各空间位置的压降和旋流区的气液相速度,对气液相流场结构以及流动机理难以深入分析。为克服实验研究的局限性,利用Fluent软件中的欧拉-欧拉多相流模型和Realizable k-ε湍流模型,采用速度与压力耦合方式的phase coupling simple算法进行稳态计算,对塔板空间上气液两相流场进行仿真研究。不同操作条件下,湿板压降模拟值与实验测量值偏差在8%以内,证明了仿真结果的正确性和仿真方法的可行性。仿真结果表明:在塔板入口的起旋阶段,速度值相对较小,而在塔板的中、下部分的旋流发展阶段,速度值明显增大,且远离叶片上表面的速度出现了明显的速度差。各区域速度幅值随液相喷淋密度或气相动能因子的增加而增大,气相动能因子对于速度分布的影响效果更大。仿真结果对蒸馏塔板结构优化提供了仿真依据以及理论指导。The optimization design of the distillation column of chemical system is the key to improve the production capacity of the distillation column. For new tridimensional rotating tray,itis difficult using experiment results to measure the plate inside the space position of gas liquid velocity,pressure drop and vortex area of gas-liquid flow field structure,therefore,it is difficult to analyze the flow mechanism. In order to solve the above problems,using Fluent software in the Euler-Euler multiphase flow model and Realizable k-ε turbulence model,the velocity and pressure coupling way,phase coupling simple algorithm,was used in the calculation of steady state for tridimensional rotating tray space on gas-liquid two phase flow field simulation study. The calculated results show that the deviation between the experimental value and the simulated value of the wet plate was within 8%,the correctness and feasibility of the simulation results were proved. At the entrance of the tray,the speed value is relatively small,and the velocity value is obviously larger and the speed of the upper surface of the blade is obviously different in the swirling stage of the middle and lower part of the tray. The amplitude of each region increases with the increase of liquid spray density or gas kinetic energy factor,and the effect of gas kinetic energy factor on velocity distribution is greater. The simulation results provide the simulation basis and theoretical guidance for the optimization of the distillation tray structure.

关 键 词：蒸馏塔板 气液两相流 欧拉模型 计算流体力学 

分 类 号：TQ053.5[化学工程]