管式紧凑型高压电场破乳器的性能试验

Performance test of compact tubular high-voltage electric field coalescers

为了探究油包水型乳化液在电场破乳过程中分散相水颗粒粒径的实际分布情况,并依据粒径变化规律得出最优电场参数,基于自主设计研制的管式紧凑型多流道高压电场破乳器,使用G600型聚焦光束反射测量仪和高频/高压脉冲交流电源,搭建了一套高压电场破乳动态测试评价系统。在验证评价系统有效性的基础上,系统开展了电场强度、频率、占空比及含水率对管式紧凑型高压电场破乳器破乳性能影响的测试评价研究。结果表明:对于所配制30%含水率的白油乳化液,破乳最优电场参数组合为场强1.2 kV/cm、频率1500 Hz、占空比45%。相继变更白油乳化液的含水率为20%和40%,得到最优电场强度分别为1.65 kV/cm、1.05 kV/cm,最优频率分别为2000 Hz、1500 Hz,表明随着乳化液含水率增加,破乳所需最优电场强度逐渐降低,最优频率也呈减小趋势。自主研发的高压电场破乳测试评价系统和评价方法,能够准确有效地表征乳化液中分散相粒径分布的变化规律。

In order to explore the actual change in the particle size distribution of the dispersed phase water droplets of the water-in-oil emulsion in the electric field demulsification process,and obtain the optimal electric field parameters according to the change rules of the particle sizes,a dynamic test evaluation system for high-voltage electric field demulsification was set up with a self-developed compact tubular high-voltage electric field coalescer,a G600 focused beam reflectance measurement instrument and a high-frequency/high-voltage pulsed AC power supply.On the basis of testing and verifying the effectiveness of the evaluation system,tests of evaluation for the impact of the electric field intensity,frequency,duty cycle and water content on the performance of the compact tubular high-voltage electric field coalescer were conducted systematically.The test results indicate that:for the prepared white oil emulsion with a water content of 30%,the optimal combination of electric field parameters for demulsification comprises an electric field intensity of 1.2 kV/cm,a frequency of 1500 Hz and a duty cycle of 45%.With the water content of the white oil emulsion changed to 20%and 40%successively,the optimal electric field intensities obtained are 1.65 kV/cm and 1.05 kV/cm,and the optimal frequencies are 2000 Hz and 1500 Hz respectively,which indicates that the optimal electric field intensity decreases gradually with the water content of the emulsion increasing.Meanwhile,the optimal frequency also presents a trend of decreasing.The self-developed test evaluation system and the evaluation method for high-voltage electric field demulsification can accurately and effectively characterize the change rules of the particles size distribution of the dispersed phase in the emulsion.