A new correlation for minimum spouting velocity for conical spouted beds operating with high density particles

Golshan, Shahab; Yaman, Onur; Köksal, Murat; Kulah, Gorkem; Zarghami, Reza; Mostoufi, Navid

doi:10.1016/j.expthermflusci.2018.03.027

Cited by 25 publications

(7 citation statements)

References 18 publications

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“…Given that an increase in solid density increases the gravitational force that the bed exerts on the gas, a higher gas flow rate or gas velocity is necessary to maintain the spouting regime. This trend is similar to that already observed by other authors with different materials [9,20,42] and very dense solids [43] in conical and cylindrical spouted beds [52]. Furthermore, sys-tems without draft tube are the configurations with the highest minimum air velocity required to maintain the spouted bed regime.…”

Section: Significant Factors In the Minimum Spouting Velocitysupporting

confidence: 89%

“…shows that the type of draft tube has hardly any influence when the lighter solid (sawdust) is spouted. Similar trends have been reported in the literature for conical sand beds spouted with and without draft tubes [20,43,44].…”

Section: Significant Factors In the Minimum Spouting Velocitysupporting

confidence: 89%

“…In addition, the change in the minimum spouting velocity for an increase in solid density is more pronounced in the systems without draft tube. for conical [9,20,42,43,44,48], cylindrical [52,53,54,55] and rectangular spouted beds [56].…”

Section: Significant Factors In the Minimum Spouting Velocitymentioning

confidence: 99%

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Minimum spouting velocity of fine particles in fountain confined conical spouted beds

et al. 2020

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Section: Significant Factors In the Minimum Spouting Velocitysupporting

confidence: 89%

Section: Significant Factors In the Minimum Spouting Velocitysupporting

confidence: 89%

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Minimum spouting velocity of fine particles in fountain confined conical spouted beds

et al. 2020

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“…There have been many relevant studies on individual bubbling-fluidized beds and spouted beds. Mostoufi et al , applied PSD to obtain the relationship between different frequency ranges corresponding to the particle motion in the various regions of the bed. Based on the analysis results, the flow pattern classification in fluidized beds could be classified. , Gao et al adopted the statistical and frequency analysis results for the identification of the flow pattern in the annular spouted bed of coarse particles.…”

Section: Introductionmentioning

confidence: 99%

Fluidization Dynamics of a New Two-Staged Fuel Reactor for Chemical Looping Gasification

Guo

Yin

et al. 2022

Energy Fuels

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A new staged fuel reactor (FR), which integrates a bubbling bed and a spouted fluidized bed, is proposed in the present work with regard to lowering the pressure drop of the staged FR during chemical looping applications. In order to gain insights into the gas−solid fluid dynamics of the new design, a cold experimental setup was established. The fluidization dynamics of the staged FR was investigated based on the pressure pulsation signal analysis using time domain analysis, power spectral density analysis, wavelet analysis, and the Hurst exponent analysis by the R/S method. There are four flow types of funnel-like flow, spout-fluidization, spouting motion, and unsteady spouting motion to be classified, and the transition boundaries of the corresponding flow types were determined. The design provides a way to lower the overall pressure drop of FR and then reduces the fan energy consumption to hold the oxygen carrier particle circulation.

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“…Pressure signals, [9,10] acoustic signals, [11] computed tomography (CT), [12] radioactive particle tracking (RPT), [13] and fibre optics [13,14] are examples of invasive and non-invasive experimental techniques. [13][14][15][16] In noninvasive methods, the probes lie outside the system, while invasive probes protrude into vessels and contact the fluid and powder, which may disturb the hydrodynamics.…”

Section: Introductionmentioning

confidence: 99%

Experimental methods in chemical engineering: Optical fibre probes in multiphase systems

et al. 2022

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As much as 75% of the raw materials in the chemical industry and 50% of consumer products are in the form of powders or granular solids. Gasification, pyrolysis, coating, granulation, drying, and mixing are examples of processes in which particles contact fluids. Researchers examine the hydrodynamics of these fluid–solid systems with pressure signals, acoustics, tomography, radioactive particle tracking, optical fibre measurements, and spectroscopy. Among these techniques, fibre optic probes are simple, inexpensive, and sensitive (spatial resolution of 100 μm) and have sampling frequencies of >1×107 Hz. Optical probes measure local hydrodynamic properties, including particle velocity, solids fraction, and voids, which are difficult to measure in heterogeneous systems like spouted beds, risers, and turbulent fluidized beds. Light from a fibre optic bundle illuminates a specific volume, and fibres from the same or separate bundle return the reflected or transmitted photons to a detector (visible, near‐infrared spectroscopy, or Raman). Sample MATLAB codes included herein together with sample experimental data demonstrate how to process raw signals for gas/solids/and bubble holdup, particle and bubble velocity, bubble size, and solids flux.

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A new correlation for minimum spouting velocity for conical spouted beds operating with high density particles

Cited by 25 publications

References 18 publications

Minimum spouting velocity of fine particles in fountain confined conical spouted beds

Minimum spouting velocity of fine particles in fountain confined conical spouted beds

Fluidization Dynamics of a New Two-Staged Fuel Reactor for Chemical Looping Gasification

Experimental methods in chemical engineering: Optical fibre probes in multiphase systems

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