Experimental investigations of a pseudo-2D spout fluidized bed with draft plates

Sutkar, VS Vinayak; Hunsel, van Tjk; Deen, NG Niels; Salikov, Vitalij; Antonyuk, Sergiy; Heinrich, Stefan; Kuipers, J.A.M.

doi:10.1016/j.ces.2013.08.046

Cited by 41 publications

(34 citation statements)

References 22 publications

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“…12c) on the static bed height in fact solved this issue, but a different instability arises, namely an unsymmetrical solids' distribution in the annulus sections. This kind of instability was also reported for the slot-rectangular spouted bed with one vertical gas inlet by Luo et al [23] and a rectangular spout-fluidized bed by Sutkar et al [32]. The bed asymmetry increases, if the static bed height is reduced again and the static height becomes smaller than the height of the draft plates.…”

Section: Draft Platesmentioning

confidence: 76%

Investigations on the spouting stability in a prismatic spouted bed and apparatus optimization

Salikov

Heinrich

Antonyuk

et al. 2015

Advanced Powder Technology

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Section: Draft Platesmentioning

confidence: 76%

Investigations on the spouting stability in a prismatic spouted bed and apparatus optimization

Salikov

Heinrich

Antonyuk

et al. 2015

Advanced Powder Technology

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“…In view of its excellent performance and widespread application, numerous experimental efforts have unsurprisingly focused on various aspects of this apparatus, spanning the hydrodynamics, solid circulation, particle velocity profile, pressure drop and fluctuation, flow reigme, maximum bed height, particle mixing, minimum spouting velocity, effect of draft plates, thermal behavior, and so on. In tandem with experimental investigations, the numerical simulation of the dense two‐phase flow has progressed too.…”

Section: Introductionmentioning

confidence: 99%

CFD–DEM investigation into the scaling up of spout‐fluid beds via two interconnected chambers

et al. 2016

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The hydrodynamics and chamber interaction in a three-dimensional spout-fluid bed with two interconnected chambers are investigated via computational fluid dynamics coupled with discrete element method (CFD-DEM), because multiple interconnected chambers are key to scaling up spout-fluid beds. The overall solid motion, spouting evolution, and spoutannulus interface is studied, followed by time-averaged hydrodynamics, particle-scale information, spout-annulus interaction, and inter-chamber interaction. The results show that inter-chamber interactions lead to unique characteristics distinct from that for a single-chamber system, including (1) asymmetry of the hydrodynamics within each chamber, (2) alternative spouting behavior in the two chambers, (3) smaller pressure drop in terms of magnitude and fluctuations, (4) two peaks in the solid residence time (SRT) frequency histogram of the annulus, (5) average SRT in the spout is twice that in a single-chamber, and (6) larger solid dispersion in all three directions. The results provide meaningful understanding for the scale-up of spout-fluid beds.In view of its excellent performance and widespread application, numerous experimental efforts have unsurprisingly focused on various aspects of this apparatus, spanning the hydrodynamics, 11,12 solid circulation, 13,14 particle velocity profile, 15 pressure drop 16 and fluctuation, 17 flow reigme, 18-20 maximum bed height, 21 particle mixing, 22 minimum spouting velocity, 23 effect of draft plates, 24-26 thermal behavior, 27 and so on. In tandem with experimental investigations, the numerical simulation of the dense two-phase flow has progressed too. As is well-acknowledged, two approaches, namely, the twofluid model (TFM) and computational fluid dynamics combined with discrete element method (CFD-DEM), are available to model the dense gas-solid flow. 28,29 The critical difference between these two approaches lies in the resolution of the solid motion: the solid phase is treated as a continuum and tracked individually in the Lagrangian framework in TFM and CFD-DEM, respectively. Zhong et al. 30 numerically explored the gas/solid flow in the three-dimensional (3-D) spout-fluid bed using TFM, wherein the kinetic theory of granular flow provided the closures. The results demonstrated that the simulation results are strongly affected by the restitution

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“…Experimental characterization of the hydrodynamics have included the solid circulation rate, voidage and particle velocity, pressure fluctuation, flow pattern and regime, spoutable height, gas mixing, particle mixing, draft plate or tube insertions, thermal behavior, spout evolution . Concurrently, numerical simulations, via either the two‐fluid model (TFM) or computational fluid dynamics coupled with discrete element method (CFD‐DEM), have also provided more understanding on the hydrodynamics of the spout‐fluid bed.…”

Section: Introductionmentioning

confidence: 99%

Improving the operational stability of the multi‐chamber spout‐fluid bed via the insertion of a submerged partition plate

et al. 2016

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The effect of a submerged partition plate on improving the gas–solid flow robustness and stability in a three‐dimensional spout‐fluid bed with multiple inter‐connected chambers is numerically investigated by means of computational fluid dynamics coupled with discrete element method (CFD‐DEM). Notably, multiple‐chamber beds are necessary in scaling up the spout‐fluid bed. The influence of plate height on gas–solid distribution, spout‐annulus interaction and chamber interaction are also studied to optimize the design. The results demonstrate that inserting a partition plate with height above a certain threshold can effectively improve the stability of spouting and uniformly re‐distribute the flux load in each chamber, giving rise to parallel fountains and lower circulation flux of the solid phase. Results indicate that the plate height should be at least 80% of the packed bed height investigated, with the most optimal being about 92% based on steady spouting, and the maximum solid and gas exchanging fluxes between the chambers. © 2016 American Institute of Chemical Engineers AIChE J, 63: 485–500, 2017

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Experimental investigations of a pseudo-2D spout fluidized bed with draft plates

Cited by 41 publications

References 22 publications

Investigations on the spouting stability in a prismatic spouted bed and apparatus optimization

Investigations on the spouting stability in a prismatic spouted bed and apparatus optimization

CFD–DEM investigation into the scaling up of spout‐fluid beds via two interconnected chambers

Improving the operational stability of the multi‐chamber spout‐fluid bed via the insertion of a submerged partition plate

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