气体搅拌萃取塔有机分散相滞液率的计算

研究了在气体搅拌筛板萃取塔中，空气-蒽醌工作液-水三相体系的流体力学性能，讨论了气相、有机分散相和连续相表观流速对有机分散相滞液率的影响．结果表明，当气相表观流速和有机分散相表观流速增大时，有机分散相滞液率均增大，而连续相表观流速对有机分散相滞液率没有影响．在有机分散相相对于连续相的相对速度计算公式的基础上，提出了计算有机分散相滞液率的方法．用该方法计算了文中实验物系和文献中提到的气-液-液三相或液-液两相体系的有机分散相滞液率，计算结果与相应实验及文献数据符合良好，相对偏差范围为4．9％～15．5％．

Calculation of Organic Dispersed Holdup in Gas-Agitated Extraction Columns

The hydrodynamics characteristics of air-anthraquinone working solution-water three-phase system used for the production of hydrogen peroxide were investigated in a gas-agitated sieve plate extraction column. The effects of the superficial velocities of gaseous phase, organic dispersed phase and continuous phase on the organic dispersed holdup were investigated. The organic dispersed holdup increased with the increase of the superficial velocity of gaseous phase and organic dispersed phase. The effect of the superficial velocity of continuous phase on the organic dispersed holdup could be neglected. Based on the equation of the relative velocity between organic dispersed phase and continuous phase, a method used to calculate the organic dispersed holdup was proposed. The organic dispersed holdup of gas-liquid-liquid systems (including liquid-liquid systems) in this study and the literatures were calculated using the method proposed in this study. The calculation data are well consistent with the corresponding experimental ones in this study and the literatures and the relative error was 4. 9%-15. 5%.