Structural Parameters Optimization of Hydraulic Coalescer
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摘要: 为了增强水力旋流器对小粒径油滴的分离性能,基于旋流分离原理提出一种可通过增大油滴间碰撞机率使小油滴碰撞聚结的水力聚结器结构。借助正交试验方法对水力聚结器的主要结构参数进行优化设计,利用Euler-Euler模型与群体平衡模型(Population Balance Model,PBM)相结合的方法,开展水力聚结器结构参数对油滴分布特性及聚结性能的影响研究,得出聚结器内油滴粒度分布聚结性能受结构参数变化的影响规律,并获得了最佳的结构参数配比。结果表明:水力聚结器对油水混合液中的油滴呈现出了较好的聚结效果,聚结器的聚结内芯底径D3、锥段长度L4、出口管长度L5均会对聚结器内油滴粒径分布产生影响,且各参数对聚结性能影响显著性由高到低为D3 > L4 > L5。优化得出最佳结构参数配比方案为C3A2B2(L4 = 600 mm、L5 = 100 mm、D3 = 10 mm),最佳结构参数条件下混合液中油滴粒度分布在25 ~ 55 μm时,经水力聚结器聚结后油滴粒度分布均值增加到524.7 μm,较初始结构聚结后的平均粒径增加了48.56%。Abstract: In order to enhance the separation performance of the hydrocyclone for small particle size oil droplets , based on the principle of cyclone separation, a new type hydraulic coalescer is proposed, which can make small oil droplets collide and coalesce by increasing the probability of collision between oil droplets. The main structural parameters of the hydraulic coalescer are optimized by orthogonal experimental method, and the effects of structural parameters of hydraulic coalescer on oil droplet distribution and coalescence performance are simulated by combining Euler-Euler model with the population balance model. The influence rule of structural parameters on the coalescence performance of oil droplet particle size distribution in the coalescer is analyzed, and the optimal structural parameters are obtained. The results show that the diameter of coalescence core D3, conical length L4 and outlet pipe length L5 of the coalescer all affect the size distribution of oil droplets in the coalescer, and the influence degree of these parameters on the coalescence performance is successively D3>L4>L5. The optimal structural parameter experimental group is C3A2B2 (L4 = 600 mm, L5 = 100 mm, D3 = 10 mm). Under the optimal structural parameters, when the inlet oil droplet size distribution is 25 - 55 μm, the average size distribution of oil droplets coalesced by hydraulic coalescer increases to 524.7 μm, which is 48.56% higher than that of initial structure coalescer.
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表 1 水力聚结器初始结构参数
参数名称 数值/mm 主直径D1 120 入口管长度L1 80 螺旋流道长度L2 80 柱段聚结腔长度L3 100 锥段聚结腔长度L4 400 出口管长度L5 100 出口管内径D2 60 聚结内芯底径D3 15 表 2 聚结器结构参数因素水平表
水平 A B C 锥段聚结腔长度L4/mm 出口管长度L5/mm 聚结内芯底径D3/mm 1 400 80 20 2 600 100 15 3 500 60 10 4 300 120 25 表 3 正交试验设计表
试验序号 A B 空列 C 空列 组合 平均粒径/μm 1 1 1 1 1 1 A1B1C1 301.07 2 1 2 2 2 2 A1B2C2 353.18 3 1 3 3 3 3 A1B3C3 442.34 4 1 4 4 4 4 A1B4C4 263.96 5 2 1 2 3 4 A2B1C3 512.84 6 2 2 1 4 3 A2B2C4 307.17 7 2 3 4 1 2 A2B3C1 347.55 8 2 4 3 2 1 A2B4C2 360.50 9 3 1 3 4 2 A3B1C4 296.07 10 3 2 4 3 1 A3B2C3 451.70 11 3 3 1 2 4 A3B3C2 392.40 12 3 4 2 1 3 A3B4C1 309.52 13 4 1 4 2 3 A4B1C2 323.43 14 4 2 3 1 4 A4B2C1 276.87 15 4 3 2 4 1 A4B3C4 252.62 16 4 4 1 3 2 A4B4C3 354.17 K1 1 360.55 1 433.41 1 354.81 1 235.01 1 365.89 T=5 545.38
Q=2 000 811.35
P=1 921 954.05K2 1 528.06 1 388.91 1 428.15 1 429.52 1 350.96 K3 1 449.69 1 434.92 1 375.79 1 761.04 1 382.46 K4 1 207.09 1 288.14 1 386.64 1 119.80 1 446.07 k1 340.14 358.35 338.70 308.75 341.47 k2 382.01 347.23 357.03 357.38 337.74 k3 362.42 358.73 343.95 440.26 345.61 k4 301.77 322.036 346.66 279.95 361.52 极差R 320.97 146.77 73.34 641.24 95.10 表 4 方差分析表
差异源 离差平
方和SS自由度df 平均离差平
方和MSF值 显著性 A 14 223.10 3 4 741.03 14.04 *** B 3 556.09 3 1 185.36 3.51 * C 59 051.73 3 19 683.91 58.28 *** 误差e 2 026.39 6 337.73 总和 78 857.31 15 注:*显著,***非常显著 -
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