Computational Fluid Dynamics Analysis of Wet Dust Removal in High-Gravity Countercurrent Rotating Packed Bed
Shuwei Guo,
Youzhi Liu,
Chao Zhang,
Chengqian Zhang,
Shufei Wang,
Yuliang Li,
Shangyuan Cheng
Affiliations
Shuwei Guo
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Youzhi Liu
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Chao Zhang
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Chengqian Zhang
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Shufei Wang
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Yuliang Li
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Shangyuan Cheng
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
High-gravity wet dust removal technology has attracted much attention because of its potential to cut liquid into smaller liquid droplets and lower energy consumption. However, the complex structure and the high-speed rotation of the rotating packed bed do not allow us to analyze the flow field using conventional methods, and thus the capture mechanism of fine particles in a high-gravity environment is poorly understood. In this study, a two-dimensional computational fluid dynamics model was established to investigate the distribution of the gas–liquid two-phase flow field inside of a rotating packed bed. The characteristics of the flow field, such as the liquid form, gas–liquid contact time, and gas flow path, were investigated, and the droplet size distribution and gas–liquid slip velocity were quantitatively analyzed. The inertial capture efficiency was calculated using the Stokes number, and the dust removal efficiency distribution in the rotating packed bed was compared. The reason for the high collection efficiency of fine particles by the high-gravity wet dust removal technology was explained by numerical simulations. Two new structures were designed to improve the total dust removal efficiency.
