Petroleum Science >2012,??Issue 4:??535-543 DOI: https://doi.org/10.1007/s12182-012-0240-7
Modeling of gas-solid flow in a CFB riser basedon computational particle fluid dynamics Open?Access
文章信息
作者：Zhang Yinghui,Lan Xingying and Gao Jinsen
作者單位：
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
投稿時(shí)間：2012-01-17
引用方式：Zhang, Y., Lan, X. & Gao, J. Pet. Sci. (2012) 9: 535. https://doi.org/10.1007/s12182-012-0240-7
文章摘要
A three-dimensional model for gas-solid flow in a circulating fluidized bed (CFB) riser was
developed based on computational particle fluid dynamics (CPFD). The model was used to simulate
the gas-solid flow behavior inside a circulating fluidized bed riser operating at various superficial gas
velocities and solids mass fluxes in two fluidization regimes, a dilute phase transport (DPT) regime
and a fast fluidization (FF) regime. The simulation results were evaluated based on comparison with
experimental data of solids velocity and holdup, obtained from non-invasive automated radioactive
particle tracking and gamma-ray tomography techniques, respectively. The agreement of the predicted
solids velocity and holdup with experimental data validated the CPFD model for the CFB riser. The model
predicted the main features of the gas-solid flows in the two regimes; the uniform dilute phase in the DPT
regime, and the coexistence of the dilute phase in the upper region and the dense phase in the lower region
in the FF regime. The clustering and solids back mixing in the FF regime were stronger than those in the
DPT regime.
developed based on computational particle fluid dynamics (CPFD). The model was used to simulate
the gas-solid flow behavior inside a circulating fluidized bed riser operating at various superficial gas
velocities and solids mass fluxes in two fluidization regimes, a dilute phase transport (DPT) regime
and a fast fluidization (FF) regime. The simulation results were evaluated based on comparison with
experimental data of solids velocity and holdup, obtained from non-invasive automated radioactive
particle tracking and gamma-ray tomography techniques, respectively. The agreement of the predicted
solids velocity and holdup with experimental data validated the CPFD model for the CFB riser. The model
predicted the main features of the gas-solid flows in the two regimes; the uniform dilute phase in the DPT
regime, and the coexistence of the dilute phase in the upper region and the dense phase in the lower region
in the FF regime. The clustering and solids back mixing in the FF regime were stronger than those in the
DPT regime.
關(guān)鍵詞
-
Gas-solid flow, circulating fluidized bed, computational particle fluid dynamics, modeling,hydrodynamics