螺旋流油滴聚结器结构优化与性能分析

Structure optimization and performance analysis of helical flow oil droplet coalescer

为解决油水混合液中微小油滴分离处理效果变差问题,研究设计了一种基于螺旋流强化油滴碰撞聚结原理的油滴聚结器,采用数值模拟方法,结合单因素分析与正交实验法,对聚结器进行了结构优化研究,并结合聚结实验,分析了主要聚结结构参数对聚结率(G)和压力损失(ΔP)等聚结性能的影响规律。实验结果表明,可显著影响聚结性能的结构参数按主次顺序依次为槽深、螺距、流道头数、夹角和圈数;通过速度场、油滴粒径、ΔP等对比,确定了聚结器最优结构参数,ΔP仅0.0133 MPa。实际在处理大部分为30μm微小油滴颗粒情况下,可实现G=9.35的最佳效果,模拟结果与实验结果吻合良好。

In order to solve the problem of poor separation effect of small oil droplets in oil-water mixture,a kind of oil droplets coalescer was designed based on the principle of helical flow enhanced collision and coalescence of oil droplets.The structure of the coalescer was optimized by numerical simulation method combined with single factor analysis and orthogonal experiments.The effects of main coalescence structure parameters on coalescence performance such as coalescence rate(G)and pressure loss(ΔP)were analyzed by coalescence experiments.The experimental results show that the structural parameters that can significantly affect the coalescence performance are groove depth,pitch,number of runner heads,angle of helical blade and number of helical channels in order of primary.Through comparative analysis of velocity field,oil droplet size andΔP,the optimalstructural parameters of the coalescer are determined.TheΔP is only 0.0133 MPa.The best G of 9.35 can be achieved under the practical conditions of 30μm of particle size of most small oil droplets.The simulation results are in good agreement with the experimental results.