针对导致工业液液搅拌反应器高能耗高物耗的关键原因之一的放大效应问题，采用实验、理论和数值模拟相结合的方法，瞄准如何实现该复杂体系微观混合调控及强化的关键科学问题，首先以反应沉淀为实验体系，系统研究多种操作条件、反应器结构和相含率等重要变量条件下，两相体系微观混合的变化规律；然后在实验基础之上，基于单相微观混合模型，发展液液两相微观混合数学模型，建立流动、宏观/微观混合和反应过程耦合的数学模型，针对实际体系进行数值模拟，揭示液液搅拌槽内不互溶惰性相对连续相中微观混合的影响机制，以优化调控及强化液液快反应过程，提高产物选择性，为实现节能降耗提供理论基础。

High materials and energy consumption and pollution emissions are partially resulted from imperfect scale-up of chemical reactors. To facilitate perfect scale-up of chemical reactors, the micomixing effect should be carefully explored and understood, especially in the more frequently used multiphase stirred reactors. The micromixing in an immiscible liquid-liquid stirred reactor is investigated by experiment, mathematical model and CFD simulation. Chemical precipitation is used as the model reaction to study the micromixing in liquid-liquid systems, with focus on the influence of operation conditions, reactor configurations and volume fractions of the dispersed phase, etc. Based on the single-phase probability density function model, a two-phase CFD-based micromixing model is developed. The simulated results are compared against the experimental data, which can shed new light on improvement of the two-phase micromixing model. The combination of experiments and CFD modeling can gain an in-depth understanding of micromixing mechanism in multiphase systems. The study is expected to lay solid theoretical foundation for improving reactor efficiency by raising the selectivity to products, and thus saving energy and reducing materials consumption.