In order to improve the efficiency of oil dehydration and maintain the stability of dehydration electric field to satisfy the technical requirements of compactness and efficiency on onshore and offshore oil processing platform

effects of pulsed electric field strength and frequency on the emulsion dehydration are studied. The relationship between water droplet deformation and electric field strength is derived based on the telescopic model and force balance of water droplet. The expression of applied electric field frequency is obtained based on the vibration kinetic model and force balance with water droplet vibration

so that the optimal dehydration electric field frequency can be determined theoretically. The results show that there exist optimal dehydration electric field strength and frequency during electric dehydration of emulsion. The dehydration rate first increases with the external electric field

and then declines when the external electric field exceeds the critical breakdown strength

with the dehydration electric unstable. When the external electric field frequency reaches the resonance frequency of water droplet

the amplitude of water droplet is the maximum and the dehydration effect is the best.