1 School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066000, Hebei, China; 2 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650000, Yunnan, China; 3 School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 4 Yingkou Dongbang Environmental Protection Technology Co., Ltd., Yingkou 115000, Liaoning, China
Simulation of bubble breaking process in a jet mixing reactor for desulfurization of molten iron
1 School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066000, Hebei, China; 2 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650000, Yunnan, China; 3 School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 4 Yingkou Dongbang Environmental Protection Technology Co., Ltd., Yingkou 115000, Liaoning, China
摘要 The gas–liquid flow behavior of the stirred flow field, the different positions of a single bubble, the initial velocity, the surface tension and the agglomeration of multiple bubbles were studied by CFD numerical simulation. The results show that the pressure distribution and velocity distribution inside the fluid during agitation indicate that the velocity difference between the liquid and the gas phase and the collision between the bubbles caused by the turbulent behavior of the liquid are the important conditions leading to the bubble breakage. Different initial bubble positions and initial bubble velocities have important effects on single bubble breakage. The surface tension is an important condition that affects the bubble breakage. When the surface tension coefficient is 0.7, the bubble will be stretched to the smallest degree; when the surface tension coefficient is 0.1, the bubble will be stretched to the largest degree and it will be easily broken into smaller bubbles. The multi-bubble results show the states and trajectories of coalescence between bubbles. The research results can provide data support for the engineering application of desulfurization process and theoretical guidance for the research of bubble breaking mechanism.
Abstract：The gas–liquid flow behavior of the stirred flow field, the different positions of a single bubble, the initial velocity, the surface tension and the agglomeration of multiple bubbles were studied by CFD numerical simulation. The results show that the pressure distribution and velocity distribution inside the fluid during agitation indicate that the velocity difference between the liquid and the gas phase and the collision between the bubbles caused by the turbulent behavior of the liquid are the important conditions leading to the bubble breakage. Different initial bubble positions and initial bubble velocities have important effects on single bubble breakage. The surface tension is an important condition that affects the bubble breakage. When the surface tension coefficient is 0.7, the bubble will be stretched to the smallest degree; when the surface tension coefficient is 0.1, the bubble will be stretched to the largest degree and it will be easily broken into smaller bubbles. The multi-bubble results show the states and trajectories of coalescence between bubbles. The research results can provide data support for the engineering application of desulfurization process and theoretical guidance for the research of bubble breaking mechanism.
Chao Lv,Xu-xin Chen,Zhao-xiang Ji, et al. Simulation of bubble breaking process in a jet mixing reactor for desulfurization of molten iron[J]. Journal of Iron and Steel Research International, 2023, 30(6): 1117-1127.
2023, Vol. 30 
