【摘要】：采用計(jì)算流體動(dòng)力學(xué)(CFD)方法和計(jì)算軟件FLUENT對(duì)分離含油廢水的三相臥式螺旋卸料沉降離心機(jī)油水分離進(jìn)行數(shù)值模擬。基于離心機(jī)轉(zhuǎn)鼓結(jié)構(gòu)與流體流動(dòng)方式的簡(jiǎn)化進(jìn)行物理建模,對(duì)離心機(jī)油水分離穩(wěn)態(tài)進(jìn)行分析,確定排水孔寬度以及溢流口軸向?qū)挾葘?duì)離心機(jī)油水分離效率的影響。模擬結(jié)果表明:在油相溢流口附近,油水兩相的粘度差和速度差導(dǎo)致分層界面處存在摩擦剪切應(yīng)力,從而導(dǎo)致部分水相跟隨油相溢流。適當(dāng)調(diào)節(jié)排水孔寬度增大該處流量可以提高離心機(jī)的油水分離效率;增大溢流口軸向?qū)挾瓤梢詼p緩流體溢流速度,減小油水兩相之間的摩擦力,從而減少水相跟隨油相溢流、提高離心機(jī)的油水分離效率。模擬方法和結(jié)果可以為三相臥螺離心機(jī)的結(jié)構(gòu)設(shè)計(jì)提供更多參考。
[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.
【作者單位】： 四川大學(xué);
【基金】：2013年國(guó)家科技支撐計(jì)劃項(xiàng)目(2013BAC12B01)
【分類(lèi)號(hào)】：TH69

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