CAJ | 학술논문

为了研究原油电脱水过程中油中液滴的形变聚结特性，借助仿真手段，采用流体场和电场相耦合的方法研究外加交流电场情况下原油乳化液中单液滴的形变和双液滴的聚结行为，并仿真分析了电场强度、界面张力、液滴直径等因素对聚结速率的影响。利用实验室中小型脱水系统开展了交流电场下原油乳化液的脱水试验，并通过高速摄像机对不同条件下乳化液中液滴的形变和聚结规律进行了观测与分析，验证了仿真结果的准确性。研究结果表明：电场强度、界面张力、液滴直径是影响乳化液脱水速率的重要因素；提高电场强度、降低界面张力和增大液滴直径可以提高乳化液中液滴的聚结速率，但过高的电场强度容易造成液滴的电分散。
위료연구원유전탈수과정중유중액적적형변취결특성，차조방진수단，채용류체장화전장상우합적방법연구외가교류전장정황하원유유화액중단액적적형변화쌍액적적취결행위，병방진분석료전장강도、계면장력、액적직경등인소대취결속솔적영향。이용실험실중소형탈수계통개전료교류전장하원유유화액적탈수시험，병통과고속섭상궤대불동조건하유화액중액적적형변화취결규률진행료관측여분석，험증료방진결과적준학성。연구결과표명：전장강도、계면장력、액적직경시영향유화액탈수속솔적중요인소；제고전장강도、강저계면장력화증대액적직경가이제고유화액중액적적취결속솔，단과고적전장강도용역조성액적적전분산。
In order to grasp the deformation and coalescence of water droplets in oil during the process of electric dehydration, the study of droplets deformation and coalescence in AC electric field were carried out by the simulation based on the method of flow field coupled in electric field, and the effects of electric field strength, interfacial tension and droplet diameter on the coalescence rate were simulated. The exper-imental study on the crude oil emulsion dehydration under AC electric field was carried out by using the small and medium dehydration test system in laboratory, and the rule of droplets deformation and coales-cence in the emulsion under different conditions were observed and analyzed by the high-speed camera, which verified the veracity of simulation results. The experimental results show that electric field strength, interfacial tension and droplet diameter are the important factors influencing the emulsion dehy-dration rate, the droplets coalescence rate raises with enhancement of electric field strength and droplets diameter and decrease of interfacial tension. However, the excessively high electric field strength causes the electric disperse of droplets.