李绍果,薛天艳,齐涛,刘长厚

• 1:大连理工大学化工学院
• 2:中国科学院过程工程研究所

摘要(Abstract)：

多级环流反应器通常在段间安装多孔分布板或其它内构件,增加了流体流动的阻力,导致环流液速降低。为此,今在多级环流反应器研究的基础上,设计了一种新型三段进气、多级环流反应器,利用新通入气体的抽提力和喷射力,缓解了段间的流动压降,并加速气泡的破碎;重点考察了进气量在各段中的分配比例对分段进气多级环流反应器流体力学的影响。应用多通道电导探针气泡特征参数测量仪和溶解氧分析仪分别测量气泡参数(气含率、气泡速度、气泡直径)及体积传质系数。实验结果表明:三段同时进气时,气泡直径明显减小,气液接触比表面积增加显著;体积传质系数远高于多级环流反应器,最大值约为多级环流反应器的2.3倍。根据修正双膜理论,计算得到了三段进气时体积传质系数的经验关联式,较好地反映出体积传质系数的变化规律。

关键词(KeyWords)： 多级环流反应器;三段进气;进气量比;气泡参数;体积传质系数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21006115)

作者(Author): 李绍果,薛天艳,齐涛,刘长厚

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