SVQS系统提升管末端上部空间不同消涡板结构的数值模拟

Numerical simulation on different vortex eliminator structures at end of riser of SVQS

为解决旋流快分(SVQS)系统提升管出口上方空间内油气呈现螺旋上升运动而导致油气在系统空间内停留时间过长的问题,设计了一种新型消涡板结构,并采用商业软件FLUENT 2021 R1对增设新型消涡板的SVQS系统进行了流动模拟。对比未安装消涡板的SVQS系统、增设弯型消涡板的SVQS系统以及增设新型消涡板的SVQS系统的速度场,发现消涡板对SVQS系统的速度场产生了影响,系统中各项速度值变大。新型消涡板在未降低SVQS系统分离效率的情况下降低了系统压降。通过对系统内油气停留时间进行分析,发现消涡板可以减少油气和细小颗粒在系统中的停留时间,且增设新型消涡板的SVQS系统中油气的停留时间小于增设弯型消涡板的SVQS系统中油气的停留时间。

It was found that an unstable vortex zone existed in the upper space at the end of the riser of the super vortex quick separation(SVQS)system,which delayed the rapid draw-off of oil and gas and increased the risk of safe system operation.The velocity fields of SVQS system without vortex elimination plate,SVQS system with additional curved vortex elimination plate and SVQS system with new vortex elimination plate were analyzed,and it was found that the new vortex elimination plate improved the velocity field of the system,which in turn affected the separation performance of the system.The new vortex elimination plate reduced the pressure drop and the energy loss of the system without reducing the separation efficiency of the SVQS system.The concept of oil and gas residence time was introduced to analyze the specific residence time of oil and gas in the SVQS system,and it was found that the vortex elimination plate could reduce the residence time of oil and gas and fine particles in the system,and the residence time of oil and gas in the SVQS system with the addition of the new vortex elimination plate was smaller than that in the SVQS system with the addition of the curved vortex elimination plate.A comprehensive comparison revealed that the structure and performance of the new vortex elimination plate was superior and more informative for industrial applications.