鼓泡塔反应器的两级气泡模型参数研究  

Two-bubble class model parameters in a bubble column

作　　者：石岩[1] 黄子宾[1] 程振民[1] 杨涛[2] 刘建坤[2] 葛海龙[2] 孟兆会[2] 蒋立敬[2] 方向晨[2] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《化学工程》2016年第1期43-48,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21076072;21306045);华东理工大学交叉学科与重大项目培育基金(WA1113008);中央高校基本科研业务费专项基金(222201314014);科技部专项基金(2014EG118273)

摘　　要：为了研究鼓泡塔反应器两级气泡模型在高黏度下的适用性,采用动态气体逸出法,在内径为286 mm,总高为7 200 mm的鼓泡塔中考察了液体黏度(1.2×10-3—210.4×10-3Pa·s)和操作条件对塔内总气含率,大、小气泡相含率和大、小气泡上升速度等两级气泡模型参数的影响。结果表明:床层总气含率随表观气速的增加而增大,大气泡相含率受液体黏度的影响较小,受表观气速的影响较大;小气泡相含率随黏度的增加而迅速下降,在高气速时受表观气速的影响较小。大、小气泡上升速度均随液体黏度的增加而降低,但随表观气速的升高有着不同的变化关系:前者明显升高,后者略有降低。大气泡直径随着黏度增大而稍有增大,小气泡直径随着黏度增大急剧减小。To study the applicability of two-bubble class model in a bubble column at high viscosity, the technique of dynamic gas disengagement was used to assess the gas holdup in a plexiglass column with the inner diameter of 286 mm and the height of 7 200 ram. The effects of various superficial gas velocity and liquid viscosity （1.2×10^-3-210.4×10^-3Pa·s） on the total gas holdup, bubble holdup and rise velocities of large and small bubbles were considered. Experimental results showed that the total gas holdup increased with an increase of the superficial gas velocity. While the large bubble holdup was little affected by viscosity but dramatically influenced by superficial gas velocity. The small bubble holdup significantly decreased with the increasing of viscosity, but little affected by viscosity at high superficial gas velocities. The rising velocities of large and small bubbles decreased with an increase of viscosity. With the increasing of superficial gas velocity, the rising velocity of large bubbles significantly increased, however those of small bubbles slightly decreased. It was found that the large bubble diameters slightly increased with an increase of viscosity, but those for small bubbles dramatically decreased.

关 键 词：鼓泡塔 气含率 两级气泡模型 气泡上升速度 

分 类 号：TQ021.1[化学工程]