静电聚结效果在线评价实验

         

摘要

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 de-creases when the flow rate increases, but the droplet diameter is still enhanced even if the flow rate is high.For the low fre-quency 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 kV· m-1for the pulsed DC and sine waveform, while those of the pulsed AC and square waveform are higher than 200 kV· 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.%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 kV· 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.

著录项

  • 来源
    《中国石油大学学报(自然科学版)》 |2018年第4期|128-134|共7页
  • 作者单位

    中国石油大学(华东)储运与建筑工程学院,山东青岛266580;

    山东省油气储运安全省级重点实验室,山东青岛266580;

    中国石油大学(华东)储运与建筑工程学院,山东青岛266580;

    山东省油气储运安全省级重点实验室,山东青岛266580;

    中国石油大学(华东)储运与建筑工程学院,山东青岛266580;

    山东省油气储运安全省级重点实验室,山东青岛266580;

    中国石油大学(华东)储运与建筑工程学院,山东青岛266580;

    山东省油气储运安全省级重点实验室,山东青岛266580;

    中国石油华北油田公司工程技术研究院,河北任丘062552;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 TE24.1;
  • 关键词

    油包水; 电聚结器; 波形; 粒径; 频率;

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