基于响应曲面法的水力聚结器结构参数优化

Optimization on Structural Parameters of Hydraulic Coalescer Based on Response Surface Method

针对油水分离中小粒径油滴难以分离的情况,设计了一种水力聚结器,借助析因筛选设计及响应曲面优化设计,结合有限体积法,并以综合考虑油滴粒径尺寸、体积占比及平均粒径等多因素提出的一种聚结效率计算方法作为评判指标,对其进行结构参数显著性分析及结构优化设计。以优化前、后的水力聚结器为模型,在相同工况下开展聚结性能模拟测试。测试结果表明,显著性较高的参数依次为锥段长度L2、尾管长度L3以及内心底径d,根据得到的结构参数与聚结效率间的最优回归方程,确定出最佳结构参数值,即锥段长度为678.63 mm,尾管长度为99.89 mm,内心底径为10 mm。优化后的聚结器出口处平均粒径由524.7μm增加至550.9μm,聚结效率由14.26%提高至14.55%,聚结性能得到明显提升,验证了优化结果的准确性及可行性。研究结果可为旋流分离设备设计提供参考。

In order to solve the problem of difficult separation of small size of oil droplets in oil-water separation,a hydraulic coalescer was designed.With the help of Plackett-Burman design and response surface optimization design,combined with finite volume method,taking a coalescence efficiency calculation method proposed by considering the particle size,volume ratio and average size of oil droplets as the evaluation indicator,the structural parameter significance analysis and structural optimization design were carried out on the coalescer.Moreover,taking the hydraulic coalescer before and after optimization as a model,a coalescence performance simulation test was conducted under the same working conditions.The results show that the parameters with higher significance are the cone section length L2,tail pipe length L3 and inner bottom diameter d in turn;based on the optimal regression equation between obtained structural parameters and coalescence efficiency,the optimal structural parameter values such as cone section length,tail pipe length and inner bottom diameter are determined as 678.63 mm,99.89 mm and 10 mm respectively;the average particle size at the outlet of the optimized coalescer is increased from 524.7μm to 550.9μm,the coalescence efficiency is increased from 14.26%to 14.55%,and the coalescence performance is obviously improved,verifying the accuracy and feasibility of the optimization results.The research results provide reference for the design of cyclone separation equipment.