Collision behaviors of binary charged oil droplets in agglomeration pretreatment for purification  

作　　者：Qingfeng Cao Yang Yang Ningbin Zhu Yi Wang Yong Cui Kangning Xiong Yuming Zhang Sikang Li Xin Wang Fei Wang 

机构地区：[1]State Key Laboratory of Green Building,Xi’an University of Architecture and Technology,710055,Xi’an,China [2]School of Building Services Science and Engineering,Xi’an University of Architecture and Technology,710055,Xi’an,China [3]University of Shanghai for Science and Technology,200093,Shanghai,China

出　　处：《Building Simulation》2025年第1期87-98,共12页建筑模拟(英文)

基　　金：sponsored by the Natural Science Basic Research Program of Shaanxi(No.2024JC-YBMS-421);the National Natural Science Foundation of China(52378110).

摘　　要：Purification of oil droplets is crucial for enhancing air quality in machining plants.However,the small particle size and high purification resistance of oil droplets present challenges.Electricity agglomeration pretreatment technology,which leverages strong inter-particle forces,improves the purification efficiency of small particles without increasing the resistance of purification equipment,showing significant application potential.This study numerically investigates the effectiveness of electricity agglomeration influenced by physical parameters(surface tension,droplet diameter)and collision parameters(collision velocity,collision angle)of oil droplets.Results indicate that surface tension and collision velocity are critical factors.When surface tension exceeds 20 mN/m,oil droplets are more likely to agglomerate upon collision.Additionally,increasing collision velocity leads to progressive destabilization of oil droplets.The critical velocities for agglomeration-separation and separation-fragmentation are identified as 8 m/s and 16 m/s,respectively.A Weber number(We)–collision angle map was constructed to represent the collision behaviors of oil droplets,revealing that at We<14.4,oil droplets agglomerate effectively after collision at any angle.This value is twice that of water droplets,indicating that oil droplets are more prone to agglomeration upon collision.These findings provide valuable insights for optimizing parameters in electrical agglomeration processes.

关 键 词：oil droplet electricity agglomeration collision behaviors PURIFICATION 

分 类 号：X513[环境科学与工程—环境工程]