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Terminal velocity of dense particles in the multisolid pneumatic transport bed
Affiliation:1. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, China;2. School of Automotive and Traffic Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, China;3. School of Aeronautic Science and Engineering, Beihang University, 37, Xueyuan, Haidian District, Beijing 100191, China;4. Department of Mechanical Systems Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa-shi, Yamagata 992-8510, Japan;5. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, China;1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150001, China;2. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;1. College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;2. Yakela Gas Production Plant, Sinopec Northwest Oilfield Company, Kuqa, Xinjiang 842017, China;1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, PR China;2. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, PR China
Abstract:The terminal velocity of dense particles in an air-fine particle heterogeneous medium defines the upper operating limit of the gas velocity in the multisolid pneumatic transport bed reactor. The terminal velocity of dense particles in an air-fine particle medium was experimentally determined from the turbulent fluidized bed voidage vs air velocity relationship in this study. It was found that the terminal velocity of dense particles decreases with the increase of the fine particle flow rate. The fine particle and dense particle interaction coefficient was defined based on the momentum balance equation for a dense particle. The interaction coefficient was empirically correlated and utilized to account for the terminal velocity of dense particles in the air-fine particle heterogeneous medium.
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