Abstract:

This paper studies the mass transfer performance of the jet external loop reactor using the water-HAc-kerosene system and the effect of the section structure of the reactor and the material velocity on the mass transfer performance.The loop reactor is divided into five sections according to the hydrodynamic characteristics, which are bottom, premixing, mixing, looping and separation sections.There is almost water phase in the bottom section and its mass transfer could be neglected.An empirical expression between the equilibrium concentration of HAc in water phase and the initial concentration of HAc in oil phase was obtained by the regression of experimental data.And then the mass transfer performance of the other four sections was researched.The results show that the mass transfer performance of all sections increased as the superficial velocity of both oil and water phases went up.The mass transfer performance of all sections could be greatly increased by feeding in the distributing pipe.And the higher the velocity in the distributing pipe, the better the mass transfer performance.The mass transfer coefficient of four sections with a sequence from large to small under the same condition was as follows, premixing section, mixing section, looping section, and separation section.

Key words:

环流反应器, 传质, 分配管, 表观速率

摘要：

利用水-醋酸-煤油体系，研究了喷射式外环流反应器的传质性能，得到了反应器结构参数与物料流率等对传质性能的影响规律。根据反应器中的流体动力学特性，将反应器划分为底部区域、预混区、混合区、环流区和分离区。反应器底部区域几乎为水相，其传质性能可以忽略。首先利用实验数据回归得到了醋酸在水相中的平衡浓度与其在油相中初始浓度的经验关系式，之后分别研究了反应器内其他4个区域的传质性能。反应器各区域的传质性能均随油相表观进料速率和水相表观进料速率的增大而提高，在混合区内设分配管可显著提高反应器各个区域的传质性能，且分配管进料速率越大，传质性能越好。相同实验条件下，各区域的体积传质系数由大到小的顺序为：预混区、混合区、环流区、分离区。

关键词:

环流反应器, 传质, 分配管, 表观速率