Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process

Meng Li; Yangbo Tan; Jianglong Sun; De Xie; Zeng Liu

doi:10.1016/j.cjche.2018.05.019

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Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process
- Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process
- 中国化学工程学报（英文版） 2019年27卷第2期页码：247-256
- Affiliations：
  
  1. 2 Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE),Shanghai,China,200240
  2. 3 Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics (HUST),Wuhan,China,430074
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.05.019
  中图分类号：
- 纸质出版：2019
- Accepted：
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Meng Li, Yangbo Tan, Jianglong Sun, 等. Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process[J]. 中国化学工程学报（英文版）, 2019,27(2):247-256.

Meng Li, Yangbo Tan, Jianglong Sun, De Xie, Zeng Liu. Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process[J]. Chin.J.Chem.Eng., 2019, 27(2): 247-256.
Meng Li, Yangbo Tan, Jianglong Sun, 等. Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process[J]. 中国化学工程学报（英文版）, 2019,27(2):247-256. DOI： 10.1016/j.cjche.2018.05.019.

Meng Li, Yangbo Tan, Jianglong Sun, De Xie, Zeng Liu. Drawdown mechanism of light particles in baffled stirred tank for the KR desulphurization process[J]. Chin.J.Chem.Eng., 2019, 27(2): 247-256. DOI： 10.1016/j.cjche.2018.05.019.

摘要

Abstract

To improve the efficiency of the desulfurization process

the drawdown mechanism of light particles in stirred tank is studied in this paper. For both up and down pumping modes

the just drawdown speeds (N

) of floating particles in transformative Kanbara Reactor (KR) are measured in one and four baffled stirred tanks experimentally. Then numerical simulations with standard k-ε model coupled with volume of fluid model (VOF) and discrete phase model (DPM) are conducted to analyze the flow field at the just drawdown speed N

. The torques on the impeller obtained from experiments and simulations agree well with each other

which indicates the validity of our numerical simulations. Based on the simulations

three main drawdown mechanisms for floating particles

the axial circulation

turbulent fluctuation and largescale eddies

are analyzed. It's found that the axial circulation dominates the drawdown process at small submergence (S=1/4T and 1/3T) and the large-scale eddies play a major role at large submergence (S=2/3T and 3/4T). Besides

the turbulent fluctuation affects the drawdown process significantly for up pumping mode at small submergence (S=1/4T and 1/3T

) and for down pumping mode at large submergence (S=2/3T and 3/4T). This paper helps to provide a more comprehensive understanding of the KR desulphurizer drawdown process in the baffled stirred tank.

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