用动态法研究气升式环流反应器中氧传递规律的平推流模型

假设气升管内气液以平推流向上流动，下降管液体环流时溶氧浓度按时间滞后，求出气升式环流反应器中溶氧动态传质模型的解析解，实验结果表明对粘度较高的ＣＭＣ水溶液／空气系统，当循环速度较快时，平推流模型与实验数据吻合较好。

A New Model to Study Oxygen Transfer in Air lift Loop Reactor Using Dynamic Method

In the laboratory type air lift loop reactor oxygen transfer from air in distilled water and carboxymethyl cellulose(CMC) solutions was studied. In order to characterize the system, the volumetric oxygen transfer coefficient k L a was determined by the dynamic method with an analytic solution which was obtained by assuming that the liquid phase is in a plug flow in the riser and a time lag exists in the downcomer. The results show that the plug flow model fits the experimental data better than the well mixing model for the system of air/carboxymethyl cellulose solutions.