Demulsification and dewatering of emulsion oil are common in petroleum and chemical industries. For waste lubricating oil, as a common W/O emulsion, with high water content and complex construction, the multi-field coupling or integration technology can satisfactorily accomplish oil and water separation which cannot be realized by using a single technological method. A coupling device integrated swirl centrifugal and high-voltage electric fields are proposed. Water-droplet coalescence in emulsified oil under the high-voltage electric field can enlarge the droplet size, and the swirl centrifugal field can rapidly and efficiently achieve water-droplet separated from emulsified oil. In this study, the performance of the coupling device was investigated by using numerical simulation and experimental methods. The numerical results were in agreement with the values obtained by experimental methods. And the numerical results show that the dewatering and deoiling rates of overflow and outflow orifices increased by 4.5% and 6.2%, respectively, when voltage amplitude 10 kV increases to 11 kV. Moreover, when inlet velocity increased from 8 m s⁻¹ to 12 m s⁻¹, the separation efficiency gradually decreased. In conclusion, the results demonstrate that the double-field coupling device has a greatly performance at 11 kV and 8 m s⁻¹.

乳化油的反乳化和脱水在石油和化学工业中很常见。对于废润滑油，作为普通的W / O乳液，具有高水含量和复杂的结构，多场耦合或集成技术可以令人满意地完成油水分离，这是使用单一技术方法无法实现的。提出了一种结合旋流离心和高压电场的耦合装置。高压电场作用下乳化油中的水滴聚结可以增大油滴的大小，涡旋离心场可以快速有效地实现乳化油与水滴的分离。在这项研究中，通过数值模拟和实验方法研究了耦合装置的性能。数值结果与通过实验方法获得的值一致。数值结果表明，当电压幅值从10 kV增加到11 kV时，溢流口和出流口的脱水率和脱油率分别提高了4.5％和6.2％。而且，当入口速度从8 m s增加时^-1至12 m s ^-1，分离效率逐渐降低。总之，结果表明，双场耦合装置在11 kV和8 m s ^-1时具有出色的性能。