射流鼓泡反应器中液相体积传质系数的测定

发布时间：2018-02-16 18:29

本文关键词： 射流鼓泡反应器传质系数动态溶氧法　出处：《化学反应工程与工艺》2017年03期 　论文类型：期刊论文

【摘要】：羰基合成反应一般采用射流鼓泡反应器,该类反应器气液混合的方式采用射流而非机械搅拌,其主要优点是结构简单、制作简便、维护费用低。研究该类型反应器的传质系数对于其设计、优化及放大操作均具有重要意义。本研究采用缩颈式圆形喷嘴,以动态溶氧法对射流鼓泡反应器内的液相体积传质系数进行测定,考察了表观气速、射流雷诺数对液相体积传质系数的影响。研究发现,随气速增大液相体积传质系数的变化规律为先增大而后保持不变。维持表观气速不变,随雷诺数增加液相体积传质系数增大,但当表观气速小于0.0012 m/s时,雷诺数对传质改善较小。建立了液相体积传质系数的经验关联式,当气体输入功率占总功率56%时,液相体积传质系数最大,气体鼓泡和液体射流的协同作用最强。
[Abstract]:The reaction of carbonyl group synthesis generally adopts jet bubbling reactor. The gas-liquid mixture of this kind of reactor adopts jet instead of mechanical agitation. Its main advantages are simple structure and simple fabrication. The study of mass transfer coefficient of this type of reactor is of great significance for its design, optimization and amplification operation. The effect of apparent gas velocity and jet Reynolds number on volume mass transfer coefficient of liquid phase was investigated by means of dynamic dissolved oxygen method. With the increase of gas velocity, the volume mass transfer coefficient of liquid phase increases first and then remains constant, while the volume mass transfer coefficient of liquid phase increases with increasing Reynolds number, but when the apparent gas velocity is less than 0.0012 m / s, the volume mass transfer coefficient of liquid phase increases with the increase of Reynolds number, but when the apparent gas velocity is less than 0.0012 m / s, The empirical correlation of volume mass transfer coefficient of liquid phase is established. When the input power of gas takes up 56% of the total power, the volume mass transfer coefficient of liquid phase is the largest, and the synergistic effect of gas bubble and liquid jet is the strongest.
【作者单位】：中石化上海工程有限公司;
【分类号】：TQ021.4

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