高压静电破乳中离散液滴的动力学分析

doi:10.3969/j.issn.0438-1157.2013.06.021

化工学报 ›› 2013, Vol. 64 ›› Issue (6): 2050-2057.DOI: 10.3969/j.issn.0438-1157.2013.06.021

高压静电破乳中离散液滴的动力学分析

张军, 何宏舟

集美大学机械工程学院,福建省清洁燃烧及能源高效利用工程技术研究中心,福建厦门 361021

收稿日期:2012-09-18 修回日期:2012-11-27 出版日期:2013-06-05 发布日期:2013-06-05
通讯作者: 张军(1966—),男,博士,副教授。
作者简介:张军(1966—),男,博士,副教授。
基金资助:
国家自然科学基金项目(51146001);福建省教育厅高校专项(JK2012027)。

Dynamics of dispersed droplets in demulsification under high electrical voltage

ZHANG Jun, HE Hongzhou

Clean Combustion and Energy Utilization Research Center of Fujian Province, School of Mechanical Engineering, Jimei University, Xiamen 361021, Fujian, China

Received:2012-09-18 Revised:2012-11-27 Online:2013-06-05 Published:2013-06-05
Supported by:
supported by the National Natural Science Foundation of China(51146001)and the Scientific Project of Fujian Provincial Department of Education(JK2012027).

摘要/Abstract

摘要： 考虑乳化液离散液滴的直径分布,对高压直流静电破乳过程中离散液滴的运动进行了理论模拟。模拟及实验结果表明,在高压静电作用下,离散滴液从一侧电极向另一侧电极运动。沿液滴运动方向,液滴浓度逐渐增大,并在电极附近达到最大。随着静电作用时间的延长,电极附近液滴浓度近似呈线性规律增大。在相同的作用时间内,高电压液滴浓度的增长幅度要更大。因此,尽可能提高施加电压要比单纯延长静电作用时间的破乳效果更好。此外,大的液滴运动速度更快,故对于离散相滴径较大的乳化液,破乳效率会更高。

关键词: 油包水乳化液, 静电破乳, 离散液滴, 运动特性

Abstract: Considering size distribution of dispersed droplets, the motion of dispersed droplets in W/O emulsion was simulated in a demulsification process under high electrostatic voltage.The results from simulation and experiment showed that under the effect of electrostatic electrical field, the droplet group moved from one electrode to the other electrode, so that the local droplet concentration increased gradually along the motion direction and the concentration reached a maximum value in the vicinity of the other electrode.The droplet concentration in the vicinity of electrode approximately linearly increased with the time of electrostatic action.The rate of increase of droplet concentration in the vicinity of electrode under a higher applied voltage was larger than that under a lower applied voltage in same time interval.To improve demulsification efficiency by increasing voltage was therefore superior to that by extending time.In addition, since the large droplet had a relatively larger velocity, the demulsification efficiency for the emulsion with large dispersed droplets would be higher.

Key words: W/O emulsion, electrostatic coalescence, dispersed droplet, motion characteristics

中图分类号:

TQ027.3⁺5

张军, 何宏舟. 高压静电破乳中离散液滴的动力学分析[J]. 化工学报, 2013, 64(6): 2050-2057.

ZHANG Jun, HE Hongzhou. Dynamics of dispersed droplets in demulsification under high electrical voltage[J]. CIESC Journal, 2013, 64(6): 2050-2057.

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高压静电破乳中离散液滴的动力学分析

Dynamics of dispersed droplets in demulsification under high electrical voltage

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