Abstract:

Liquid-liquid extraction is a widely used separation technique, and has important applications in petrochemical， pharmaceutical extraction， metal separation and other fields. Extraction column is one of the common extractors to realize this process. Nowadays, the design of extraction column still highly relies on the previous experience and tedious experiments. Recent research progresses on extraction column were reviewed. Experimental measurement techniques for fluid flow, drop size and concentration field were summarized. Drop-based modeling method and multi-scale computational fluid dynamic simulation were introduced. Studies on process intensification were reviewed. As moving towards digitalization and sustainability chemical processes, some future work was suggested. For experimental methods, in situ measurements and real-time analysis need to be developed. For modeling and simulation methods, more attention should focus on microscopic interfacial behaviors and influence of mass transfer. Based on the advanced experimental and simulation method, new column and internal design need to be further developed based on new extraction system for process intensification to face future challenges in chemical processes.

Key words: extraction, column, measurement, computational fluid dynamics, process intensification

摘要：

液液萃取是应用广泛的分离技术，在石油化工、制药提取、金属分离等领域都有重要的应用。萃取塔作为常见的分离设备当前的设计还十分依赖于以往的经验，需要进行大量的实验。文章综述了萃取塔设备的研究现状，总结了对塔内流场、液滴和浓度场的实验测量技术，介绍了基于液滴的模型化方法和多尺度计算流体力学模拟方法，归纳了过程强化的相关研究进展。并对萃取塔未来的研究发展进行了展望，在数字化和可持续的发展背景下，未来在实验方面可以关注实时测量和优化，模型化方面关注于微观界面行为和传质影响的描述，在基于先进的实验和模拟技术基础之上，结合新萃取体系进行萃取设备和内构件的开发，从而实现过程强化，以解决化工过程面临的共同挑战。

关键词: 萃取, 塔器, 测量, 计算流体力学, 过程强化