基于CFD的SVQS快分系统冲蚀磨损研究及原因分析

Study and Cause Analysis of the Erosion Wear of Super Vortex Quick Separation System Based on CFD

壁面磨损是快分系统失效破坏的重要因素,研究磨损对于提高快分系统的使用寿命具有重要意义。以计算流体力学方法(CFD)为基础,通过Fluent软件对快分系统的内部流场进行耦合计算,采用离散相模型(DPM)对系统壁面磨损进行数值仿真。通过数值分析,确定了快分系统壁面的主要磨损部位为旋流臂、壁面靠近喷出口位置、沉降段中下部、提升管顶部以及隔流筒挡板位置,并得到系统的速度及磨损分布云图,结合磨损分布规律初步分析了快分系统壁面的磨损原因以及可能影响磨损的因素;将数值仿真结果与带隔流筒和隔流盖板的旋流快分系统(SVQS)在工业应用中的实际磨损情况进行对比分析,验证了数值仿真结果的准确性和可靠性。

As wall wear is an important factor for the failure of Super Vortex Quick Separation System(SVQS), the study of wear is of great significance in improving its service life. In this work, based on the computational fluid dynamics(CFD) research method, the internal flow field of SVQS system was coupled by Fluent software, and the wall wear of the system was numerically simulated using the DPM erosion model. Through the numerical analysis, the main wear parts of the system wall were determined to be the cyclone arm, the position on the wall near the jet outlet, the middle and lower part of the settlement section, the top of the riser and the position of the isolate cylinder baffle;the system speed and wear map were gained;and the causes of wear on the wall of the quick separation system as well as the factors that might affect the wear were preliminarily analyzed with the help of wear distribution law. Besides, the accuracy and reliability of the numerical simulation results were verified through a comparison to the actual wear condition of the SVQS system having isolate cylinders and coverplates and used in indurial applications.