筛板萃取塔液滴行为及其影响因素

打开文本图片集

文章编号：1003-9015（2025）02-0218-10

中图分类号：TQ053.5 文献标志码：A DOI：10.3969/j.issn.1003-9015.2025.02.005

Abstract：In order to study the dropletbehavior in a sieve plate extraction column，a combination of experimental and simulation methods wasappliedto investigate themorphologyof dropletspassing through thesieveplate，and thecoalescence-breakagecharacteristics of the sieve plate by defining coalescence-breakage index.The results show that droplets passthrough the sieve holes in diferent ways under various experimental conditions，including passing through sieve holes directly，passing through sieve holes after breakage，and passing through sieve holes after coalescence.When the interfacial tension of the system is low，the sieve plate mainly plays therole of breaking of the droplets，andthe sieve plate coalescence-breakage index decreases with the increase of hole diameter.When the interfacial tensionofthesystem ishigh，thesieve plate mainlyplaystheroleofcoalescingofthe droplets，and the sieve platecoalescence-breakage index increases with the increase of hole diameter.The sieve plate coalescencebreakage index increases as the wetability of the sieve plate decreases.Based on experimental data，acorrelation for estimating the sieve plate coalescence-breakage index was proposed，withan average deviation of O.1144，which indicates that the correlation can be used to evaluate thecoalescence-breakage characteristicsof the sieve plate. Key words： extraction column；sieve plate； droplet behavior; wettability；VOF simulation

1前言

液液萃取具有选择性好、分离效率高等优势，目前已经在石油、化工、湿法冶金、稀土提取、制药等众多领域得到广泛应用[1]。（剩余11699字）