Investigation of a swirling flow nozzle for a fluidised bed gas distributor

Aworinde, Samson M.; Holland, Daniel J.; Davidson, John

doi:10.1016/j.ces.2015.04.001

Cited by 22 publications

(11 citation statements)

References 30 publications

(23 reference statements)

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“…However, at large values of superficial air velocity, the frictional effects were more prominent at the boundary of the bed column in comparison with the vicinity of the central cylinder. The reason was an increase in centrifugal force on the particles moving closer to the walls of the bed column and away from the central cylinder [17,18].…”

Section: Of 13mentioning

confidence: 99%

“…Paulose [17] introduced three types of annular blade distributors, namely, a distributor with inclined holes, a single-row vane-type distributor, and a three-row vane-type distributor. The idea of a helical nozzle arrangement for introducing a swirling motion into the bed was presented by Aworinde [18]. The effect of different parameters of the annular blade distributor on the fluidization quality of an SFB was investigated by Sulaiman et al [2].…”

Section: Introductionmentioning

confidence: 99%

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PIV and Statistical Analysis of a Swirling Bed Process Carried out Using a Hybrid Model of Axial Blade Distributor

et al. 2019

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: An air distributor is a major component of industrial fluidized beds and its design significantly affects the quality of fluidization. In this study, a hybrid design of an annular distributor was tested for swirling fluidized beds (SFBs). Using this distributor design, a bed was operated in its uniform swirling regime of operation. A high-speed imaging method was used to capture images of the fluidized bed of particles. These images were processed using a binary cross-correlation technique and analyzed through particle image velocimetry (PIV) software. The velocity vector fields and corresponding velocity magnitudes at different locations in the bed were obtained for different bed weights, blade inclination angles, and superficial air velocities (SAVs). The Response Surface Analysis program was used to predict the bed velocity statistically. The statistical confidence interval for the bed velocity ranged from 0.49485 to 0.49998. The statistical fit and experimental values of the bed velocities were 0.49741 and 0.538 m/s, respectively. Almost identical bed weights and superficial velocities were inferred through experimental and statistical analyses; however, a small difference of 6.4° was noticed in the blade inclination angles.

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Section: Of 13mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

PIV and Statistical Analysis of a Swirling Bed Process Carried out Using a Hybrid Model of Axial Blade Distributor

et al. 2019

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“…Recently, Aworinde et al [14] proposed a novel gas distributor plate with many upwardfacing nozzles incorporated with removable helical coils. Their aim was to swirl the fluidizing gas prior entering the bed.…”

Section: Fluidized Bed Distributormentioning

confidence: 99%

Improvement of Solid-Gas Interaction in Fluidized Bed Systems via Secondary Air- Injection

2017

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Since the invention of fluidized bed systems to augment chemical reactions, numerous innovations were introduced to the system. These innovations result-in substantial improvement to the overall efficiency apart from resulting the fluidized bed system to become more compact. One of the innovations were the introducing of secondary air inside the bed so that a secondary motion in lateral direction can increase the amount of solid-gas interaction. This paper reviews various techniques proposed by researchers in providing secondary air inside the fluidized bed system. In general, four techniques were common in which the bed was named after: vortexing bed, cyclonic bed, rotating bed and swirling bed. Though resemble similarity, each of these beds were unique and comes with different advantageous. In conclusion, a fluidized bed system can be improved by the secondary motion in the bed which provides opportunities for further innovations.

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“…In 2015, Aworinde et al [10] proposed a swirling flow nozzle for enhancing fluidization quality of a fluidized bed. Compared to the simple nozzle, better gassolid contact was observed whit swirling flow nozzle.…”

Section: Introductionmentioning

confidence: 99%

Effect of Novel Swirl Distributor Plate on Hydrodynamics of Fluidized Bed Gasifier

Afrooz

Ching

2019

IJE

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A B S T R A C TThe main advantage of a fluidized bed is its capability in excellent gas-fuel mixing. However, due to the lacks of gas radial momentum, its lateral mixing of gas-solid is not adequate. Therefore, this research is focused on fluidized bed hydrodynamics enhancement using the modified gas distributor plate design. For getting an optimum fluidized bed hydrodynamics prediction, three different classical ANSYS Fluent drag models, namely Wen-Yu, Syamlal O'Brien, and Gidaspow are examined first. Afterward, a novel distributor plate called swirl distributor plate (SDP) is proposed in order to enhance the gas-fuel mixing in vertical and radial directions. In terms of simulation approach, results were presented and compared with the experimental data. It has been observed that better hydrodynamics prediction is achieved by Syamlal O'Brien drag model. The effect of SDP on gas-solid mixing was then studied numerically and compared with conventional distributor plate (CDP). Compared with CDP, better gas-solid mixing was found while the SDP was used. As a final point, gasification test was conducted in a lab scale system in order to study and compare the composition of produced syngas using both distributor plates. Based on the gasification results, SDP leads to promotion of Hydrogen and Carbon monoxide by 34.85 and 65.92 percent, respectively.

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Investigation of a swirling flow nozzle for a fluidised bed gas distributor

Cited by 22 publications

References 30 publications

PIV and Statistical Analysis of a Swirling Bed Process Carried out Using a Hybrid Model of Axial Blade Distributor

PIV and Statistical Analysis of a Swirling Bed Process Carried out Using a Hybrid Model of Axial Blade Distributor

Improvement of Solid-Gas Interaction in Fluidized Bed Systems via Secondary Air- Injection

Effect of Novel Swirl Distributor Plate on Hydrodynamics of Fluidized Bed Gasifier

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