Solids circulation behaviour in a circulating fluidized bed with a concentric annular feeding mechanism

Zhang, Guanghuai; Chen, Zhiwei; Bao, Jie; Wei, Weisheng; Bi, Xiaotao

doi:10.1002/cjce.24111

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…There have also been attempts to apply the standard deviation of pressure fluctuations in an inclined standpipe [33] and the pressure drop between the riser inlet and top of the surrounding annular feeding mechanism [34] to predict the solid circulation rate. The differences between experimental models and common CFB systems make this less suitable.…”

Section: Correlations Based On Pressure Drop Of Other Placesmentioning

confidence: 99%

Measuring Technologies for CFB Solid Circulation Rate: A Review and Future Perspectives

Liu

Zhang

et al. 2022

Energies

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Solid circulation rate (Gs) represents the mass flux of circulating particles in circulating fluidized bed (CFB) systems and is a significant parameter for the design and operation of CFB reactors. Many measuring technologies for Gs have been proposed, though few of them can be applied in industrial units. This paper presents a comprehensive study on measuring technologies, and the results indicate that though the accumulation method is most widely applied, it is constrained by the disturbance of normal particle circulation. Some publications have proposed mathematic models based on pressure drop or other parameters to establish Gs measurement models; these necessitate the accurate modeling of complicated gas-solid flows in industrial devices. Methods based on certain measurement devices to specify parameters like velocity require device endurance in the industrial operation environment and stable local gas-solid flow. The Gs measuring technologies are strongly influenced by local gas-solid flow states, and the packed bed flow in standpipes make the bottom of standpipes an ideal place to realize Gs measurement.

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Section: Correlations Based On Pressure Drop Of Other Placesmentioning

confidence: 99%

Measuring Technologies for CFB Solid Circulation Rate: A Review and Future Perspectives

Liu

Zhang

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

“…Zhang et al [ 3 ] investigate the effect of solids circulation rate on the behaviour of a circulating fluidized bed with a concentric annular feeder (a‐CFB), with emphasis on the effects of the entrance structure design and the gas flow rates in the riser and annular region. Chaouki and coworkers [ 4 ] apply the CFD‐DEM technique to simulate experimental results from a study on the hydrodynamics of spouted fluidized beds of spherical and elongated sphero‐cylindrical particles.…”

mentioning

confidence: 99%