高长径比气升式环流反应器的流体动力学模型  

Hydrodynamic Model in Airlift Loop Reactor with Big Ratio of Height to Diameter

作　　者：高闯[1,2] 王继锋[2] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《沈阳化工大学学报》2016年第3期217-222,共6页Journal of Shenyang University of Chemical Technology

摘　　要：在高长径比（H/D=22.2）气升式环流反应器中,依据能量平衡原理及漂流通量模型,考虑到导流筒中由于固体颗粒的加入而引起的液固两相间的能量损失,提出液固能量损失系数Cf,并给出Cf的测量方法,建立上升区循环液速的预测模型.以空气-水-石英砂为物系,研究气含率、固含率、循环液速随表观气速的变化规律,将循环液速的预测值与实验值进行比较.结果表明：表观气速在1.32-4.45 cm/s范围内时,气含率随表观气速的增大而增大;固含率与表观气速的关系不大,固体颗粒含量越多固含率越大;循环液速随表观气速的增加而增大,随着固体含量的增加而减小,并随粒径的增大而减小.In the airlift loop reactor with big ratio of height to diameter, taking the energy dissipation due to the interaction between solid and liquid caused by the addition of solid particles in draft tube into account based on the basis of energy balance principle and drift-flux model. The method for calculating the energy dissipation coefficient between liquid-solid was proposed,and the model of liquid circulation velocity in riser was established. The variation of gas holdup, solid holdup and liquid circulation velocity with superficial gas velocity for the system of air-water-quartz sand in airlift reactor are researched. Calculated values and experimental values of liquid circulation velocity are compared. The results showed that the gas holdup in riser increased with the increase of superficial gas velocity in a range of superficial gas velocity1. 32 - 4. 45 cm/s,and the solid holdup was independent on the superficial gas velocity and only increased with the increase of the solid loading. The liquid circulation velocity increased with the increase of superficial gas velocity,while decreased as the solid loading increased and decreased as the solid diameter increased.

关 键 词：气升式环流反应器 气含率 固含率 循环液速 

分 类 号：TQ052[化学工程]