多管环流反应器的流动和传质特性

摘要

A correlation of liquid circulation rate in a multi-tube air-lift loop reactor(MALR) was established on the basis of the momentum balance, in which a new method for the determination of the overall frictional-loss coefficient in air-water system was developed. The method for determining the exposure time of liquid particle in the gas-liquid interphase was proposed, which formed the basis for the calculation of volumetric mass transfer coefficient of gas component according to Higbie's penetration theory. The validity of these two correlations was demonstrated by the fairly good agreements between the calculated liquid rate and mass transfer coefficients with the experimental data.%根据动量平衡原理建立了多管气升式环流反应器(MALR)中液体速度的理论关系式，给出了流动阻力系数的计算方法；以Higbie的渗透理论为基础提出了计算液体表面微元在相界面暴露时间的方法，并建立了预测体积传质系数的模型方程.测定了空气-水体系中MALR的体积传质系数和循环液速随两个上升管表观气速的变化规律，并分别将体积传质系数、循环液速的预测值与实测值进行了比较.