空化分离油砂装置空化成因及压力影响分析  

Analysis on Cavitation Cause and Pressure Effect of Hydraulic Cavitation Separation Oil Sand Unit

作　　者：王伟辰 吕凤霞[1,2] 袁惠新[1,2] WANG Weichen;LYU Fengxia;YUAN Huixin(School of Mechanical Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学机械工程学院,江苏常州213164 [2]江苏省绿色过程装备重点实验室(常州大学),江苏常州213164

出　　处：《常州大学学报（自然科学版）》2019年第5期70-76,共7页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21676031)

摘　　要：空化分离油砂可有效地消除传统分离方法对高能耗、溶剂、表面活性剂的依赖,具有较大的研究潜力。文中采用CFD技术对一种油砂分离用水力空化装置内部流域进行数值模拟,阐述了空化的成因和压力对装置内空化的影响。结果表明:该装置所产生的空化主要由射流和周围流域的速度梯度所引起的涡流产生,同时空化汽泡被裹挟流向下游扩大了空化范围;较高的主流压力和喷嘴压力产生更好的空化效果,当喷嘴压力大于某一定值后空化范围基本稳定;而低压力出口其空化范围更大,空化效果更好。Oil sand separation by cavitation can effectively eliminate the dependence of traditional separation methods on high energy consumption,solvent and surfactant.In this paper,a CFD technique is used to simulate the watersheds in a hydrodynamic cavitation device for oil sand separation,the causes of cavitation and the influence of pressure on cavitation in the plant are expounded.The results show that:the cavitation produced by the device is mainly caused by eddy current caused by jet and velocity gradient of the surrounding watershed,and the cavitation bubble is entrapped downstream to expand the cavitation range.;higher mainstream pressure and nozzle pressure produced better cavitation effect,and the cavitation range was basically stable when the nozzle pressure was greater than 1.9 MPa;the low pressure outlet has greater cavitation and better cavitation effect.

关 键 词：空化 油砂分离 数值模拟 

分 类 号：TE65[石油与天然气工程—油气加工工程]