锥角变化对旋流除砂性能影响的数值模拟

Numerical Simulation of Cone Angle Effect on De-sanding Performance of Hydrocyclone

针对在油田开展采出液除砂的必要性进行了介绍,对所研究的除砂型旋流器结构和基本原理进行了说明。利用数值模拟软件Fluent,将某油田现场采出液作为分离对象,对主直径为56mm的除砂旋流器进行变锥角结构数值模拟研究。得出不同锥角结构旋流器的速度场、压力降和砂相体积分数分布的变化规律,并对不同锥角结构旋流器的除砂分离效率进行了对比。研究表明:当锥角为5°时,旋流器内部产生的切向速度最大,底流出口砂相体积分数分布最高,但也伴随着较大的压力降,所完成的砂相分离效率最高为96.30%。

The necessities of de-sanding produced and fundamental principle of the cyclone-desander. liquid in oilfields were introduced, including both structure Through making use of Fluent software and taking the produced fluid from an oilfield as a separation object, the research on numerically-simulating variable cone angles＇ structure of the 56mm-diameter-cyclone-desander was implemented to obtain the distribution and the variation law of the velocity, pressure drop and sand phase volume fraction. Comparing the sand separation efficiency of the hydrocyclone with different cone angles shows that, the tangential velocity （v1） in the cyclone is maximum when the cone angle is 5° and the sand volume fraction distribution in the bottom outlet is the highest along with a larger pressure drop and a sand separation efficiency up to 96.30%.