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Numerical simulation on the effect of combining centrifugation, electric field and temperature on two-phase separation
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.cep.2020.107803
Ye Peng , Bao Yu , Xianming Zhang , Haifeng Gong , Yunqi Liu

The demulsification and dewatering of emulsion is a considerable aspect for the two-phase separation. Though the centrifugation can realize the separation process, the water-in-oil emulsion with high water content and complex components cannot be effectively treated. Therefore, an enhanced two-phase separation process by combing heating process, centrifugation and electric field was proposed in this study. To understand the separation performance of the enhance process, the coupling unit considered temperature variation was taken as the research object, and the effects of main control parameters (voltage amplitude and heating temperature) on flow field and separation efficiency were investigated by numerical simulation and experimental methods. The results demonstrate that the numerical simulation can effectively predict the separation efficiency; the variation of voltage amplitude and heating temperature has a significant impacts on the inner flow field. And based on the centrifugation, combing electric field and heating process can effectively improve the separation efficiency. Specially, the increase of the maximum reverse flow velocity and diameter of reverse flow core can effectively promote the two-phase separation, and the separation efficiency of the enhanced two-phase separation process can be up to 94 % when the optimal parameters are 11 kV and 70 °C, respectively.



中文翻译:

离心,电场和温度相结合对两相分离影响的数值模拟

乳液的破乳和脱水是两相分离的重要方面。尽管离心可以实现分离过程,但是不能有效处理高含水量和复杂成分的油包水乳液。因此,本研究提出了通过加热,离心和电场相结合的改进的两相分离工艺。为了解增强工艺的分离性能,以温度变化为耦合单元作为研究对象,通过数值模拟和实验研究了主要控制参数(电压幅值和加热温度)对流场和分离效率的影响。方法。结果表明,数值模拟可以有效地预测分离效率。电压幅值和加热温度的变化对内部流场有重大影响。并且在离心的基础上,结合电场和加热过程可以有效地提高分离效率。特别地,最大逆流速度和逆流芯直径的增加可以有效地促进两相分离,并且当最佳参数为11 kV时,增强型两相分离过程的分离效率可以达到94%。和70°C。

更新日期:2020-01-08
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