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›› 2007, Vol. 7 ›› Issue (2): 258-262.

• 反应与分离 • 上一篇    下一篇

油田沉降罐中间层复杂乳状液微波破乳-离心分离

范永平,王化军,张强   

  1. 北京科技大学土木与环境工程学院
  • 出版日期:2007-04-20 发布日期:2007-04-20

Microwave Demulsification-Centrifugation Separation of Complicated Emulsion in the Middle Part of a Crude Tank

FAN Yong-ping,WANG Hua-jun,ZHANG Qiang   

  1. Civil and Environmental Engineering School, University of Science and Technolog Beijing
  • Online:2007-04-20 Published:2007-04-20

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摘要： 对长庆油田沉降罐的乳化层复杂乳状液进行了微波破乳-离心分离实验研究. 详细考察了微波辐射强度、辐射时间、温升速率、离心时间、离心转速等对脱水效果的影响，得出了最佳条件：微波辐射强度2 W/g，微波辐射时间3 min，温升速率8.3℃/min，离心时间4 min，离心转速2500 r/min. 在优化条件下，含水45.1%的乳状液经微波辐射-离心分离后得到的离心油样含水率为2.10%. 通过对Zeta电位的检测，探讨了微波破乳的机理，认为微波辐射减小了油水界面的Zeta电位，失去Zeta电位作用的水珠容易碰撞聚并，导致油水分离.

关键词: 乳状液, 微波破乳, 离心分离

Abstract: Microwave demulsification-centrifugation separation of complicated emulsion in the middle part of a crude tank in Changqing oil field was studied. The influences of the microwave radiation time, microwave radiation intensity, heating rate, centrifugation time and rotation speed on the dehydration rate of the emulsion were investigated. The optimum conditions were obtained, microwave radiation intensity was 2 W/g, microwave radiation time 3 min, heating rate 8.3℃/min, centrifugation time 4 min, and rotation speed 2500 r/min. Under these optimum operating conditions, the content of water in the emulsion could be reduced from 45.1% to 2.10% by the microwave demulsification-centrifugation separation. Based on the measurements of Zeta potential, the mechanism of microwave demulsification was analyzed, which suggests that the microwave radiation decreased the Zeta potential of the interface between water and oil, and the emulsion beads losing the effect of Zeta potential collided and aggregated easily, leading to the separation of water and oil.

Key words: emulsion, microwave demulsification, centrifugation separation