W/O型乳化液在矩形流道中的静电聚结破乳研究

分析了带绝缘层矩形流道电场强度的影响因素以及分散相水颗粒在均匀交流电场下的聚结机理,设计了矩形流道连续流动静电聚结实验装置。以矩形波高压/高频脉冲交流电源为基础,研究电场强度、脉冲频率、脉宽比、流动速度等参数对不同W/O型乳化液中分散相水颗粒静电聚结特性的影响。实验结果表明,含水率为5%、电场强度为1.69kV/cm、流动速度为0.17m/s、脉宽比为40%、脉冲频率为1000Hz,水颗粒粒径能增长24倍,聚结效果明显。

Research on the Electrostatic Coalescing Demulsification of Water-in-Oil Emulsions in Rectangular Flow Channel

The study of de-emulsification mechanism for water-in-oil emulsions by electrostatic coalescence in rectangular flow channel was the basis and prerequisite of developing vessel internal electrostatic coalescer. The influence factors of electric field intensity with insulating coating in rectangular flow channel and coalescence mechanism of dispersed droplets under homogeneous alternating current electric field were analyzed. Then the continuous-flow electro-coalescence experimental apparatus with rectangular flow channel was designed. Based on this apparatus, the effects of electric field intensity, pulsed frequency, pulse width ratio, flow velocity to the electrostatic coalescing characteristics of dispersed droplets were studied by applying rectangular-wave high-voltag and high-frequency pulsed alternating current with water-in-oil emulsions. The experimental results show that electric field intensity and flow velocity play an important role in electrostatic coalescing process of dispersed droplets, and have an optimal operating condition.