反应蒸馏塔内催化剂不同装填方式的液固传质效率  

Liquid-Solid Mass Transfer of Catalyst in a Reactive Distillation Column with Different Packing Method

作　　者：穆斌[1] 贾金明[1] 沈建国[1] 高步良[1] 程振民[1] 

机构地区：[1]华东理工大学国家重点化学工程实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2005年第6期701-705,共5页Journal of East China University of Science and Technology

摘　　要：采用苯甲酸颗粒-水-空气系统,进行了气液两相逆流状态下的传质实验,获得了规整装填和散堆装填两种不同装填方式对液固传质系数的影响。分析得出在载点以下的操作范围内,气液逆流反应蒸馏塔内液相雷诺数的变化对传质影响较大,气相雷诺数的影响则不明显;并且散堆装填的液固接触效率明显好于规整装填,两者效率之比为1.72倍,并采用液固接触效率关联了传质Sherw ood数,得到了如下关联结果:Sh/S c1/3=4.651.1R e0.L 245。Liquid-solid mass transfer coefficients were determined by measuring the dissolving rate of benzoic acid in cylindrical tablets into water. Gas flow rates varied from 0 to 0.51 kg/（m^2 · s） and liquid flow rates from 1.41 to 4.93 kg/（m^2 · s）. The results showed that liquid-solid contacting efficiency of dumped packing exceeds that of stacked packing by 1.72 times. The liquid-solid mass transfer coefficients are sensitive to the liquid flow rate, but independent on the gas flow rate. The Sherwood numbers of mass transfer were correlated in terms of liquid-solid contacting efficiency.

关 键 词：逆流 液固传质 装填方式 液固接触效率 反应蒸馏 

分 类 号：TQ032.41[化学工程]