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.
范永平;王化军;张强. 油田沉降罐中间层复杂乳状液微波破乳-离心分离[J]. , 2007, 7(2): 258-262.
FAN Yong-ping;WANG Hua-jun;ZHANG Qiang. Microwave Demulsification-Centrifugation Separation of Complicated Emulsion in the Middle Part of a Crude Tank. , 2007, 7(2): 258-262.
2007, Vol. 7 
