| 摘要: |
| 轴向进液水力旋流器因内部设有增压流道,可在低压入口条件下实现油水高效分离。采用CFD-PBM耦合方法对轴入导锥式旋流器内油滴聚并破碎行为及分离特性进行数值模拟分析,得出操作参数对油滴聚并破碎的影响规律,同时进行室内实验,对模拟结果的准确性进行验证。结果表明:研究范围内湍动能越大位置的油滴粒径越小,随着入口进液量增大,旋流器溢流及底流出口区域的湍动能增强,油滴粒径逐渐减小;对于该结构旋流器而言,一定范围内持续增加入口进液量,可提高旋流器内的切向速度进而提升分离性能,但同时也增大了油滴破碎机率,致使分离效率降低;研究范围内,进液量为3.62 m3/h时分离效率达到最大值;增大溢流分流比,虽然可以降低底流含油体积分数,但同时也增大了溢流区域油滴间的破碎,致使分离效率降低,分流比为20％时分离效率达到最大值。 |
| 关键词: 旋流器 油滴 聚并 破碎 湍动能 分离性能 |
| DOI：10.3969/j.issn.1673-5005.2019.02.017 |
| 分类号::TQ 051.8 |
| 文献标识码:A |
| 基金项目:国家高技术研究发展计划项目(2012AA061303);国家教育部高等学校博士学科点专项科研基金课题(20132322110002);东北石油大学研究生创新科研项目(YJSCX2017-019NEPU) |
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| Analysis of droplet coalescence and breakage characteristics in axis-in hydrocyclone with diversion-cone |
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XING Lei1,2, JIANG Minghu1,2, ZHANG Yong1,2, XIONG Feng1,2
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(1.School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China;2.Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention, Daqing 163318, China)
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| Abstract: |
| The axis-in hydrocyclone is widely used for its pressure increasing flow channels which can realize good separation performances under the condition of low-pressure entrance. The CFD-PBM numerical simulation of oil droplets breakage and coalescence, and separation characteristics in the hydrocyclone was carried out. The influence of operation parameters on the breakage and coalescence was obtained. Meanwhile, the experiment study was carried out to validate the accuracy of the simulation results. The results show that at the place with greater turbulence kinetic energy, the radius of the oil droplet is smaller. With the increase of the entrance flow rate, the turbulent kinetic energy in the overflow and underflow is enhanced and the size of oil droplets decreases. Increasing the entrance flow rate not only increases the tangential velocity and separation efficiency, but also enhances the oil droplet breakage which can reduce the separation efficiency. For the axis-in hydrocyclone, when the entrance flow rate is 3.62 m3/h, the separation efficiency reaches the maximum value. Increasing the overflow split ratio can not only decrease the underflow oil concentration but also enhance the oil droplet breakage in the area of overflow which can result in the decrease of separation efficiency. When the overflow split ratio reaches 20％, the separation efficiency reaches the maximum value. |
| Key words: hydrocyclone oil droplet coalescence breakage turbulent kinetic energy separation performance |
