The treatment of exhaust gas from large diesel engines is an important factor to affect environment. Because of its advantages in reaction efficiency and heat transfer efficiency, circulating fluidized bed (CFB) has shown great potential with regard to save energy and purify emissions from large diesel engines. This paper mainly investigated a three-dimensional modeling of the CFB, and a rolling function is applied to simulate its unsteady working conditions, which is called the rolling circulation fluidized bed (RCFB). Two-fluid model based on Euler-Euler approach is utilized to numerically simulate the gas-solid two phases flow within the RCFB. In order to give the comparable results between the present simulation and the previous experiment, the effect of Stokes number on particle phase distribution behaviors in the RCFB is investigated. By simulating the overall swing condition of the RCFB based on a dynamic grid, the effect of the swing condition on particle radial distribution uniformity in the riser is obtained. The reliability of quantitative modeling is verified based on the experimental results of the extant literature. Based on this simulation, the influence of the Stokes number on the radial distribution of particles as well as the relationship between the uniformity of the distribution and particle size is obtained.
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Almuttahar A, Taghipour F (2008) Computational fluid dynamics of high density circulating fluidized bed riser: Study of modeling parameters. Powder Technol. 185(1):11–23
Corbett JJ, Wang C, Winebrake JJ, Green E (2007) Allocation and Forecasting of Global Ship Emissions. Clean Air Task Force and Friends of the Earth International: Boston, MA, 26
Deng R, Wei F, Liu T, Jin Y (2002) Radial behavior in riser and downer during the FCC process. Chem. Eng. Process. 41:259–266
Deng R, Wei F, Jin Y, Zhang Q, Jin Y (2002) Experimental study of the deep catalytic cracking process in a downer reactor. Ind. Eng. Chem. Res. 41:6015–6019
Eyring V, Köhler HW, Lauer A, Lemper B (2005) Emissions from international shipping: 2. Impact of future technologies on scenarios until 2050. J Geophys Res Atmos. https://doi.org/10.1029/2004JD005620
Huang C, Qian Z, Zhang M, Wei F (2006) Solids mixing in a down-flow circulating fluidized bed of 0.418-m in diameter. Powder Technol 161:48–52
Liu H, Elkamel A, Lohi A, Biglari M (2013) Computational fluid dynamics modeling of biomass gasification in circulating fluidized-bed reactor using the Eulerian-Eulerian approach. Ind Eng Chem Res. 52(51):18162–18174
Natarajan P, Velraj R, Seeniraj RV (2010) Effect of various parameters on the solid circulation rate in a liquid-solid circulating fluidized bed[J]. Asia-Pac J Chem Eng 3:459–470
Qi XB, Zhang H, Zhu J (2008) Solids concentration in the fully developed region of circulating fluidized bed downers. Powder Technol. 183:417–425
Rossbach V, Utzig J, Decker RK, Noriler D, Meier HF (2016) Numerical gas-solid flow analysis of ring-baffled risers. Powder Technol. 297:320–329
Sahoo A, Rana S (2010) Mathematical model for mixing index in gas–solid fluidized bed: an analysis[J]. Asia-Pac J Chem Eng 5:674–680
Sobieski W (2009) Momentum exchange in solid-fluid system modeling with the Eulerian multiphase model. Dry Technol. 27:653–671
Wu B, Zhu JX, Briens L, Zhang H (2007) Flow dynamics in a four-inch downer using solids concentration measurements. Powder Technol. 178:187–193
Zhang H, Zhu JX, Bergougnou MA (1999) Hydrodynamics in downflow fluidized beds (1): Solids concentration profiles and pressure gradient distributions. Chem. Eng. Sci. 54:5461–5470
Zhang M, Qian Z, Yu H, Wei F (2003) The solid flow structure in a circulating fluidized bed riser/downer of 0.42-m diameter. Powder Technol 129:46–52
Zhang MH, Chu KW, Wei F, Yu AB (2008) A CFD–DEM study of the cluster behavior in riser and downer reactors. Powder Technol. 184:151–165
Zhao T, Liu K, Murata H, Harumi K, Takei M (2014) Experimental and numerical investigation of particle distribution behaviors in a rolling circulating fluidized bed. Powder Technol. 258:38–48
Zhao T, Liu K, Murata H, Harumi K, Takei M (2015) Investigation of bed-to-wall heat transfer characteristics in a rolling circulating fluidized bed. Powder Technol. 269:46–54
Zhao T, Nakamura Y, Liu K, Murata H, Takei M (2016) The effect of rolling amplitude and period on particle distribution behavior in a rolling circulating fluidized bed. Powder Technol. 294:484–492
ZhaoT, Takei M, Liu K, Cui Y (2013) Stokes effect on particle distribution in a circulating fluidized bed under swing motion. Proceeding of the 7th World Congress on Industrial Process Tomography, Krakow, Poland, 852–858
ZhaoT, Takei M, Murata H, Liu K (2013) Particle descending velocity near the wall of a rolling circulating fluidized bed. AIP Conf. Proc, 1592:3
Zhu XJ, Jun D, Li YF (2012) Hydrodynamic characteristic of large particles in vibrated fluidization bed. Appl. Mech. Mater. 170:2454–2457
This work was supported by the National Natural Science Foundation of China (Grant No. 51876175). The authors would like to express their gratitude to Mr. WeianRen for his assistance.
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Wang, P., Zhao, T., Liu, K. et al. Influence of Stokes number on the particle phase distribution behaviors in a rolling circulating fluidized beds (RCFB). J Vis (2021). https://doi.org/10.1007/s12650-020-00736-w
- Large diesel engine
- Circulating fluidized bed
- Euler-Euler model
- Particle distribution