文献类型：期刊文献

英文题名：Experimental study of secondary oil droplet formation during coalescence process of oil Droplet-Gas bubble

作者：Yan, Sheng-lin[1,2];Yang, Xiao-yong[1];Bai, Zhi-shan[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

年份：2024

卷号：293

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20241515877373);WOS:【SCI-EXPANDED(收录号:WOS:001222025500001)】；

基金：This paper was supported by the National Natural Science Founda- tion of China (22225804, 22208207, 22078102) , for which the authors express their appreciation.

语种：英文

外文关键词：Flotation; Oil droplet-gas bubble interaction; Coalescence; Secondary droplet

摘要：Flotation is an efficient pretreatment technology for oily water. In this study, the coalescence processes of air bubbles and isooctane droplets with different size ratios, 1.0-2.2, were investigated using a high-speed imaging system. Two types of oil droplet-gas bubble interaction have been identified: full coalescence and partial coalescence. Through analysis of interfacial force at the liquid bridge, it has been observed that interfacial force at the oil droplet bridge affects the lateral contraction of the liquid bridge, which in turn affects the coalescence of oil droplets and gas bubbles. Through dimensional analysis, a phase diagram of dimensional parameter coalescence behavior has been constructed, and the critical line of partial coalescence and full coalescence has been determined. This work fills the void in the study of secondary oil droplet coalescence within the oil droplet-gas bubble coalescence in gas flotation, which is potentially applied for industrial air flotation system design and optimization.