Oil droplet movement and micro-flow characteristics during interaction process between gas bubble and oil droplet in flotation

作     者：Shenglin Yan Yan Zhang Chong Peng Xiaoyong Yang Yuan Huang Zhishan Bai Xiao Xu Shenglin Yan;Yan Zhang;Chong Peng;Xiaoyong Yang;Yuan Huang;Zhishan Bai;Xiao Xu

作者机构：State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical ProcessSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China Sinopec Dalian Research Institute of Petroleum and PetrochemicalsDalian 116041China Institute of Environmental Pollution and HealthSchool of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第5期

页      面：229-237页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China(51578239) the Education and Scientific Research Projects of Shanghai(17DZ1202802)。 

主　　题：Flotation Oil droplet-gas bubble interaction Approach process Hydrodynamics 

摘      要：Flotation is an efficient pre-treatment technology for oily water.In this work,the interaction process between the moving oil droplet and the gas bubble was studied by high-speed camera and Bassset-Boussinesq-Oseen(BBO)theoretical model,and the experimental and simulation results of the oil droplet trajectory were compared.Moreover,the micro-particle image velocimetry system was utilized to observe the flow inside and outside of the moving oil droplet.The results show that the BBO model with the mobile bubble’s surface can reflect the velocity change trend of the oil droplet during the interaction process between the moving oil droplet and the gas bubble,but there are some significant differences between the experimental and simulation results.While the oil droplet is moving on the bubble’s surface,the velocity of the area near the contact point of oil droplet–gas bubble is less than that of the other areas inside the oil droplet.Meanwhile,the flow of water above the oil drop is more biased towards the gas bubble.