화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.38, No.8, 1578-1591, August, 2021
DOI10.1007/s11814-021-0818-0  Export Citation
Pressure drop axial distribution uniformity of the particle bed in the radial bed
Tianhang Wu1, Dewu Wang1, 2, Ruojin Wang1, †, Bin Zhao1, †, Meng Tang3, Shaofeng Zhang1, 2, and Lu Nie1
  • 1School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
  • 2National and Local Joint Laboratory for Chemical Energy Conservation Process Integration and Resource Utilization, Tianjin 300130, China
  • 3School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
E-mail:,
In a radial bed, the uniformity of the pressure drop distribution is investigated by Euler single-phase flow and porous media models under different operating mode (CF-U/Z, CP-U/Z), gas flow rate (120-240m3/h), particle diameter ((0.5-3)exp-3 m) and bed voidage (0.3-0.6). According to the nonuniform index Δ, the uniformity relates to these parameters and improves with increasing total pressure drop of particle bed Δps (sum of the pressure drops of particle bed and gas perforation) or decreasing main channel pressure drop Δpg. Comparing the flow fields with/without particles, Δps is approximately equal to the pressure drop of the particle bed with high-porosity Johnson net, which is well calculated by the Ergun equation. Δpg can be calculated by the modified momentum equation containing k. After changing the wall shear stress and gas-solid axial resistance, it is found that the internal generation factors for k include the influence of gas perforation on boundary layer and the existence of gas axial velocity after perforation. Besides, the global/local k hardly changes with the investigated parameters. The local k is a function of axial position or velocity ratio, which changes obviously at the end of the main channel for the existence of a gas stagnation zone.
Keywords:Radial Bed;Pressure Drop Distribution;Particle Bed;Main Channel;Momentum Exchange Coefficient
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