基于流体微团的油滴碰撞聚结过程研究

石油炼制与化工 ›› 2023, Vol. 54 ›› Issue (1): 95-103.

基于流体微团的油滴碰撞聚结过程研究

吴波¹,陈小元²,王委²,孙启轩³,张新月³,吴震³,薛建良⁴

1. 中石化华东石油工程有限公司
2. 中石化华东石油工程有限公司江苏钻井公司
3. 山东科技大学机械电子工程学院
4. 山东科技大学安全与环境工程学院

收稿日期:2022-05-19 修回日期:2022-07-14 出版日期:2023-01-12 发布日期:2023-01-16
通讯作者: 吴波 E-mail:wubo.oshd@sinopec.com
基金资助:
降膜蒸发含盐浓水系统内复杂流动特性对多元盐结垢及传热的微观作用机理

STUDY ON COLLISION COALESCENCE PROCESS OF OIL DROPLETS BASED ON FLUID PARTICLE MODEL

Received:2022-05-19 Revised:2022-07-14 Online:2023-01-12 Published:2023-01-16

摘要/Abstract

摘要： 建立反映油滴粒子聚结规律的流体微团模型，并使用耦合表面张力模型的CLSVOF多相流模型以及标准k-ε湍流模型对油滴粒子碰撞聚结过程进行模拟研究。结果表明：在接近速率为0.50 m/s的条件下，非均匀粒径油滴发生正向碰撞聚结的概率大于均匀粒径油滴；均匀粒径油滴发生正向碰撞聚结的概率随接近速率的增加而呈非线性增加，当接近速率从0.16 m/s提升至0.80 m/s时，其发生正向碰撞聚结的概率约增加17%；均匀粒径油滴在接近速率为0.50 m/s的条件下，油滴发生碰撞聚结的概率与碰撞角度呈负相关关系，发生碰撞聚结的有效碰撞角度介于0°~45°之间。

关键词: 碰撞聚结, 流体微团, 数值模拟, 除油旋流分离器, 聚结概率

Abstract: In the process of oil water separation by deoiling hydrocyclone, the separation effect of emulsion oil droplets and dispersed phase oil droplets whose particle sizes are less than 20 μm is not ideal. A fluid particle model was established to reflect the coalescence law of oil droplets, and collision coalescence process of oil droplet particles was simulated by using the standard k-ε turbulence model and the CLSVOF multiphase flow model coupled with the surface tension model. The results showed that the probability of positive collision and coalescence of non-uniform size oil droplets was greater than that of uniform size oil droplets under the condition of approaching velocity of 0.50 m/s. The probability of positive collision coalescence of oil droplets with uniform size increased nonlinearly with the approaching velocity, and when the approaching velocity increased from 0.16 m/s to 0.80 m/s, the probability of forward collision coalescence increased by 17%. When the approach velocity of oil droplets with uniform particle size was 0.50 m/s, there was a negative correlation between the probability of collision coalescence and the angle of collision, and the effective collision angle for collision coalescence was 0°- 45°. The research results can improve the ability of the deoiling hydrocyclone for oil water elaborately separation.

Key words: collision coalescence, fluid particle model, numerical simulation, deoiling hydrocyclone, coalescence probability

吴波陈小元王委孙启轩张新月吴震薛建良. 基于流体微团的油滴碰撞聚结过程研究[J]. 石油炼制与化工, 2023, 54(1): 95-103.

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