Combination of electric field and medium coalescence for enhanced demulsification of water-in-oil emulsion
Combination of electric field and medium coalescence for enhanced demulsification of water-in-oil emulsion
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DOI：
10.1016/j.ces.2021.116680
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发表时间：
2021-04
影响因子：
4.7
通讯作者：
Hao Lu;Wu Shihan;Zhiqiang Miao;Xiao Xu;Liu Yiqian;W. Zhiqiang;Hualin Wang;Qiang Yang
中科院分区：
文献类型：
--
作者：
Hao Lu;Wu Shihan;Zhiqiang Miao;Xiao Xu;Liu Yiqian;W. Zhiqiang;Hualin Wang;Qiang Yang
油包水型乳状液的高效分离在石油和化学工业中起着重要的作用，但单一方法难以对其进行深度净化。在这项工作中，提出了一种集成直流电场和介质聚结的组合处理。该装置利用电场迁移水滴，纤维介质用于拦截和捕获水滴。水滴在电极之间快速地来回迁移，导致液滴-介质碰撞的速率增加。与单独的介质聚结或电破乳相比，组合处理在分离性能上显示出显著的改善，特别是提高了处理细液滴的能力。随着外加电场强度的增加，该装置可以以更大的通量和更少的停留时间实现更好的分离效果。一般来说，在10 kV/cm时，分离效率比0 kV/cm时提高约20%。
The efficient separation of water-in-oil emulsions plays significant roles in the petroleum and chemical industries, but deep purification using a single method is difficult. In this work, a combined treatment integrating a direct current electric field and medium coalescence is proposed. The device utilizes an electric field to migrate water droplets, and the fiber medium is used to intercept and capture the droplets. Water droplets migrate rapidly back-and-forth between the electrodes, causing an increase in the rate of droplet-medium collision. The combined treatment showed a significant improvement in the separation performance compared with medium coalescence or electrical demulsification alone, especially improving the ability to process fine droplets. As the applied field strength is increased, the device can achieve a better separation effect with larger throughputs and less residence time. In general, at 10 kV/cm, the separation efficiency increased by approximately 20% compared with that at 0 kV/cm.