Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor

doi:10.1016/j.cjche.2021.02.021

中国化学工程学报 ›› 2021, Vol. 34 ›› Issue (6): 150-159.DOI: 10.1016/j.cjche.2021.02.021

• Chemical Engineering Thermodynamics • 上一篇下一篇

Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor

Yanni Chi, Rui Zhang, Xianghai Meng, Jian Xu, Wei Du, Haiyan Liu, Zhichang Liu

State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China

收稿日期:2020-06-18 修回日期:2021-01-19 出版日期:2021-06-28 发布日期:2021-08-30
通讯作者: Zhichang Liu
基金资助:
The authors gratefully acknowledge the financial support of the Natural Science Foundation of China (21890763), and National Science and Technology Innovation Leading Talents Project of National Ten Thousand People Plan.

Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor

Yanni Chi, Rui Zhang, Xianghai Meng, Jian Xu, Wei Du, Haiyan Liu, Zhichang Liu

State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China

Received:2020-06-18 Revised:2021-01-19 Online:2021-06-28 Published:2021-08-30
Contact: Zhichang Liu
Supported by:
The authors gratefully acknowledge the financial support of the Natural Science Foundation of China (21890763), and National Science and Technology Innovation Leading Talents Project of National Ten Thousand People Plan.

摘要/Abstract

摘要： A liquid-liquid cyclone reactor (LLCR) was designed to achieve mixing-reaction-separation integration during isobutane alkylation catalyzed by ionic liquids. However, studies of the droplets deformation and breakage in the kind of reactors are lacking. In this work, the research studied the velocity distribution, pressure field, and turbulent field to investigate the flow pattern and the main energy loss location in the LLCR through the computational fluid dynamics (CFD) method. The simulation results were verified by experiemnts to prove the correctness of the model. Then the deformation and breakage process of droplets, and the influencing factors of droplets breakage were studied by remodeling which was based on the tangential velocity distribution result of the three dimensional model. The three dimensional simulation results clearly showed that the pressure of the LLCR was mainly concentrated in the cone section and fluid turbulent motion was the most intense near the lateral wall. The reconstruct the results of the two dimensional model clearly showed that the deformation and breakage location of droplets were mainly occurred in the velocity boundary layer, while it was difficult to break in the mainstream region. In addition, low surface tension and high Weber number had a positive effect on droplet breakage.

关键词: Liquid-liquid cyclone reactor, Ionic liquid, separation, Droplet deformation, Droplet breakage, Computational fluid dynamics

Abstract: A liquid-liquid cyclone reactor (LLCR) was designed to achieve mixing-reaction-separation integration during isobutane alkylation catalyzed by ionic liquids. However, studies of the droplets deformation and breakage in the kind of reactors are lacking. In this work, the research studied the velocity distribution, pressure field, and turbulent field to investigate the flow pattern and the main energy loss location in the LLCR through the computational fluid dynamics (CFD) method. The simulation results were verified by experiemnts to prove the correctness of the model. Then the deformation and breakage process of droplets, and the influencing factors of droplets breakage were studied by remodeling which was based on the tangential velocity distribution result of the three dimensional model. The three dimensional simulation results clearly showed that the pressure of the LLCR was mainly concentrated in the cone section and fluid turbulent motion was the most intense near the lateral wall. The reconstruct the results of the two dimensional model clearly showed that the deformation and breakage location of droplets were mainly occurred in the velocity boundary layer, while it was difficult to break in the mainstream region. In addition, low surface tension and high Weber number had a positive effect on droplet breakage.

Key words: Liquid-liquid cyclone reactor, Ionic liquid, separation, Droplet deformation, Droplet breakage, Computational fluid dynamics

Yanni Chi, Rui Zhang, Xianghai Meng, Jian Xu, Wei Du, Haiyan Liu, Zhichang Liu. Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor[J]. 中国化学工程学报, 2021, 34(6): 150-159.

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Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor

Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor

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