三相卧螺离心机油水分离的CFD分析
发布时间：2018-11-12 11:46
【摘要】：采用计算流体动力学(CFD)方法和计算软件FLUENT对分离含油废水的三相卧式螺旋卸料沉降离心机油水分离进行数值模拟。基于离心机转鼓结构与流体流动方式的简化进行物理建模,对离心机油水分离稳态进行分析,确定排水孔宽度以及溢流口轴向宽度对离心机油水分离效率的影响。模拟结果表明:在油相溢流口附近,油水两相的粘度差和速度差导致分层界面处存在摩擦剪切应力,从而导致部分水相跟随油相溢流。适当调节排水孔宽度增大该处流量可以提高离心机的油水分离效率;增大溢流口轴向宽度可以减缓流体溢流速度,减小油水两相之间的摩擦力,从而减少水相跟随油相溢流、提高离心机的油水分离效率。模拟方法和结果可以为三相卧螺离心机的结构设计提供更多参考。
[Abstract]:The numerical simulation of oil-water separation of three-phase horizontal spiral discharge centrifuge was carried out by using computational fluid dynamics (CFD) method and computational software FLUENT. Based on the simplification of centrifugal drum structure and fluid flow, the steady state of oil and water separation of centrifuge is analyzed, and the influence of the width of drainage hole and the axial width of overflow port on the separation efficiency of oil and water is determined. The simulation results show that the viscosity difference and velocity difference between oil-water phase and oil-water phase lead to frictional shear stress at the interface of oil phase, which leads to partial water phase following oil phase overflow. The oil and water separation efficiency of centrifuge can be improved by adjusting the width of drainage hole and increasing the flow rate. Increasing the axial width of the spillway can slow down the overflow velocity, reduce the friction between the oil-water phases, reduce the water-phase following oil-phase overflow, and improve the oil-water separation efficiency of the centrifuge. The simulation method and results can provide more references for the structural design of three-phase horizontal centrifuge.
【作者单位】： 四川大学;
【基金】：2013年国家科技支撑计划项目(2013BAC12B01)
【分类号】：TH69
[Abstract]:The numerical simulation of oil-water separation of three-phase horizontal spiral discharge centrifuge was carried out by using computational fluid dynamics (CFD) method and computational software FLUENT. Based on the simplification of centrifugal drum structure and fluid flow, the steady state of oil and water separation of centrifuge is analyzed, and the influence of the width of drainage hole and the axial width of overflow port on the separation efficiency of oil and water is determined. The simulation results show that the viscosity difference and velocity difference between oil-water phase and oil-water phase lead to frictional shear stress at the interface of oil phase, which leads to partial water phase following oil phase overflow. The oil and water separation efficiency of centrifuge can be improved by adjusting the width of drainage hole and increasing the flow rate. Increasing the axial width of the spillway can slow down the overflow velocity, reduce the friction between the oil-water phases, reduce the water-phase following oil-phase overflow, and improve the oil-water separation efficiency of the centrifuge. The simulation method and results can provide more references for the structural design of three-phase horizontal centrifuge.
【作者单位】： 四川大学;
【基金】：2013年国家科技支撑计划项目(2013BAC12B01)
【分类号】：TH69
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