新结构气液相并流鼓泡塔式反应器流动特性与CFD模拟  

Hydrodynamics in a Novel Gas-Liquid Cocurrent Bubble Reactor and its CFD Simulation

作　　者：刘天奇[1] 王嘉骏[1] 冯连芳[1] LIU Tian-qi WANG Jia-jun FENG Lian-fang(State Key Laboratory of Chemical Engineerimg, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China)

机构地区：[1]化学工程联合国家重点实验室(浙江大学),浙江大学化学工程与生物工程学院,浙江杭州310027

出　　处：《高校化学工程学报》2016年第5期1088-1094,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21276222);化学工程联合国家重点实验室开放课题(SKL-Ch E-13D01)

摘　　要：构建了一种新型结构的气液相并流多级鼓泡塔式反应器,具有单层液相混合均匀、轴向返混小的特点,适用于慢反应以及对传质要求较高的情况。采用基于双流体欧拉模型的计算流体力学方法,能够准确模拟反应器内部的气液两相流动特性、液相混合特性与停留时间分布特性,与冷态模拟实验结果相符。此反应器在宽泛的操作范围内均能正常运作,整塔气液并行流动稳定;塔板压降较低,维持在0.2 KPa左右;多釜串联虚拟级数在3-3.4。A new gas-liquid cocurrent bubble reactor with good liquid mixing in each tray and low axial liquidbackmixing was developed for slow reactions and high mass transfer reactions. A computational fluid dynamicsmethod based on a two-fluid model was used to study gas-liquid hydrodynamics, mixing process in liquid phaseand residence time distribution in the reactor, which shows consistent results with cold model experiments. Theresults show that the liquid and gas phases keep steady under cocurrent flow and the tray pressure drop is low（0.2 kPa） under a wide operating range. The residence time distribution results show that the multi-reactor seriesmodel number is between 3 and 3.4.

关 键 词：计算流体力学 鼓泡塔 停留时间分布 流体动力学 多相流 

分 类 号：Q813.11[生物学—生物工程]