高压脉冲电场中乳化油最佳破乳电场参数

摘要

Reasonable electric field parameters were the key premise to ensure the emulsion oil’s efficient demulsification and dewatering under the high voltage pulse electric field, however the study of the theory about the electric field parameters was rarely reported. By establishing the vibration kinetics model of emulsion oil droplet under the high voltage pulse electric field, the swing-frequency characteristics of droplet vibration were studied, and then the resonance frequency and resonance amplitude of droplet were obtained. On the basis of study above, by combining with the condition of droplet’s maximum stable tensile deformation and using the method of drawing, the electric field frequency and strength values of emulsion oil’s optimal demulsification were then calculated with physical parameters of the system. The experimental results show that, emulsion oil system’s optimal demulsification electric field parameters obtained from calculation can enhance the efficient coalescence of the droplets in emulsion. Therefore, the high voltage pulse electric field parameters of emulsion oil’s optimal demulsification, determined by nonlinear vibration kinetics, are reasonable and reliable.%合理的电场参数是确保高压脉冲电场实现乳化油液高效破乳脱水的重要前提，目前关于电场参数的理论研究鲜有报道。通过建立乳化油液滴在高压脉冲电场中的振动动力学模型，研究液滴振动幅频特性，得到液滴共振频率及共振振幅。在此基础上，根据乳化油系统物性参数，结合液滴最大稳态拉伸变形条件，利用作图法可计算出乳化油最佳破乳电场频率与电场强度的值。实验结果表明，计算得到的最佳破乳电场参数能够实现乳化液滴高效结聚。因此，利用非线性振动动力学确定的乳化油最佳破乳电场参数是合理可靠的。