摘要
研究在线测量连续流动聚结实验系统,实现油包水乳状液微观形貌的在线观察和采集,并利用该系统研究电场参数和流动参数等对油包水乳状液中水滴聚结特性的影响规律。结果表明:高强电场在低流量下具有显著作用,随着流量增加其作用减弱但在高流量下依然使液滴粒径明显增大;不同波形下,低频范围内最优频率为30 Hz,但是超过50 Hz后随频率增加液滴聚结效果提高;不同波形下,液滴粒径随电场强度增加而增加,但最优电场强度不同;直流脉冲和正弦交流波形的最优场强约为200 k V·m^(-1),而交流脉冲和方波的最优场强要高于该值;不同波形下聚结效果不同,相同电场频率和电场强度下直流脉冲电场中聚结效果最优,正弦交流、交流脉冲和方波电场中聚结效果稍差。
The online measurement electrostatic coalescence flow evaluation system was designed,which can be used to observe and collect the micro-morphology of the water in oil emulsion online. We also use this system to study the effect of electric filed and flow parameters on the droplet coalescence characteristics of the W/O emulsion. The results show that,the electric field with high strength is effective for the droplet coalescence when the flow rate is low. The effect of the electric field strength decreases when the flow rate increases,but the droplet diameter is still enhanced even if the flow rate is high. For the low frequency range,the optimal frequency is 30 Hz,but the coalescence effect is enhanced with the increase of the frequency when it exceeds 50 Hz under different waveforms. The droplet diameter increases with the increase of the electric field strength,but the optimal value of the electric field strength is different under different waveforms. The optimal value of the electric field strength is 200 k V·m^（-1） for the pulsed DC and sine waveform,while those of the pulsed AC and square waveform are higher than 200 k V·m^（-1）. The coalescence effect is different under different waveforms. It is the pulsed DC electric field that is the best for droplet electrocoalescence,while it is a bit poorer for the sine,pulsed AC and square waveforms.
作者
杨东海
孙永祥
何利民
罗小明
鲁晓醒
YANG Donghai;SUN Yongxiang;HE Limin;LUO Xiaoming;LU Xiaoxing(College of Pipeline and Civil Engineering in China University of Petroleum（East China）,Qingdao 266580,C h in a;Shandong Provincial Key Laboratory of OH ＆ Gas Storage and Transportation Safety,Qingdao 266580,China;CNPC Huabei Oil f ield Company Engineering Technology Research Institute,Renqiu 062552,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第4期128-134,共7页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金青年项目(51704318)
山东省自然科学基金项目(ZR2017BEE008)
中央高校基本科研业务费专项(16CX02001A)
中国石油大学科研启动基金项目(Y1715005)
关键词
油包水
电聚结器
波形
粒径
频率
water in oil
electrostatic coalesce
waveform
droplet diameter
frequency
