聚合物对旋流器内油滴聚结与分离效率的影响

夏宏泽; 赵立新; 刘琳; 王羽; 章宝玲; 张爽

doi:10.13433/j.cnki.1003-8728.20200168

聚合物对旋流器内油滴聚结与分离效率的影响

doi: 10.13433/j.cnki.1003-8728.20200168

夏宏泽^{1, 2,},
赵立新^{1, 2, ,},
刘琳^{1, 2},
王羽³,
章宝玲^{1, 2},
张爽^{1, 2}

1.
东北石油大学机械科学与工程学院，黑龙江大庆 163318
2.
黑龙江省石油石化多相介质处理及污染防治重点实验室，黑龙江大庆 163318
3.
中国石油集团长城钻探工程有限公司钻具公司，辽宁盘锦 124010

基金项目:

国家"863"计划课题项目 2012AA061303

东北石油大学"龙江学者"配套科研经费项目 LJ201803

详细信息

作者简介:
夏宏泽(1993-), 硕士研究生, 研究方向为流体机械及工程, xiahongze1@163.com

通讯作者:
赵立新, 教授, 博士, Lx_zhao@126.com

中图分类号: TK72
计量
- 文章访问数: 187
- HTML全文浏览量: 33
- PDF下载量: 30
- 被引次数: 0
出版历程
- 收稿日期: 2019-01-02
- 刊出日期: 2021-07-01

Effects of Polymer on Coalescence and Separation Efficiency of Oil Droplets in Hydrocyclon

XIA Hongze^{1, 2
,},
ZHAO Lixin^{1, 2
, ,},
LIU Lin^{1, 2},
WANG Yu³,
ZHANG Baoling^{1, 2},
ZHANG Shuang^{1, 2}

1.
School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
2.
Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention, Daqing 163318, Heilongjiang, China
3.
CNPC GWDC Drilling Tools Company, Panjin 124010, Liaoning, China

摘要

摘要: 为了研究聚合物对水力旋流器内油滴聚结与分离效率的影响规律, 以螺旋导流内锥式旋流器为研究对象, 利用群体平衡模型(PBM)方法对不含聚与含聚0.5‰工况下油水两相在旋流器内的速度场、黏度场、油滴聚结、运移特性及分离效率进行数值分析, 并通过实验验证。结果表明: 聚合物的加入增大了水相黏度, 使油滴在旋流器内最大停留时间与轴向运动距离增加, 增加了油滴碰撞聚结的机会, 但降低轴心处油滴向上运动的轴向速度, 使油滴无法快速从溢流口流出, 最终从底流口流出, 增加油水分离的难度。与不含聚时相比, 含聚0.5‰工况下, 轴心处的油滴粒径与含油体积分数较高, 但简化分离效率由99.79%降低至94.72%。通过马尔文粒度仪对两种工况下入口与出口的油滴粒径进行测试, 含聚0.5‰时溢流与底流口油滴粒径高于不含聚时, 验证了模拟的准确性。
- 聚合物 /
- 旋流器 /
- 油滴 /
- 聚结 /
- 分离效率
Abstract: In order to study the effects of polymer on the coalescence and separation efficiency of oil droplets in hydrocyclone, the paper studies a spiral-conducting inner cone hydrocyclone object and uses the population balance model (PBM) to study the conditions of no polymer or the 0.5‰ polymer concentration. The velocity field, viscosity field, oil droplets coalescence, migration characteristics and separation efficiency of the oil-water phase in the hydrocyclone are numerically analyzed and verified by experiments. The analysis results indicate that the addition of polymer increases viscosity of the water phase, the maximum residence time and axial motion distance of the oil droplets in the hydrocyclone, thus increasing the chance of coalescence of oil droplets but reducing the axial speed of the oil droplets moving upward at the axial center, making oil drops not flow out quickly from the overflow and finally flowing out from the downflow which increases the difficulty of oil-water separation. Compared with the condition of no polymer, the particle size of the oil droplets and the oil volume fraction at the axial center of the hydrocyclone are higher, but the simplified separation efficiency decreases from 99.79% to 94.72% on the condition that the polymer concentration is 0.5‰. The oil droplet sizes at the inlets and outlets of the two cases are measured by the Marvin particle size meter. The oil droplet sizes at the overflow and downflow on the condition that the polymer concentration is 0.5‰ is higher than those without polymer, verifying the accuracy of the simulation results.
- polymer /
- hydrocyclone /
- numerical analysis /
- coalescence /
- efficiency

HTML全文

图 1 螺旋导流内锥式旋流器结构图

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图 2 流体域网格划分

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图 3 不同截面不同含聚浓度下的切向速度分布曲线图

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图 4 不同截面不同含聚浓度下的轴向速度分布曲线图

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图 5 S₁截面不同含聚浓度下表观黏度曲线图

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图 6 油滴粒径与体积分数分布云图

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图 7 不同含聚浓度下溢流与底流口油滴粒径频数图

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图 8 不同含聚浓度下油滴在旋流器内运移轨迹对比图

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图 9 不同含聚浓度下油滴粒径随时间变化

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图 10 试验工艺流程图

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图 11 不同含聚浓度下入口与出口粒径分布

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