Design Factors in Fountain Confined Conical Spouted Beds

Estiati, Idoia; Tellabide, Mikel; Pablos, Aitor; Altzibar, Haritz; Aguado, Roberto; Olazar, Martı́n

doi:10.1016/j.cep.2020.108062

Cited by 11 publications

(3 citation statements)

References 36 publications

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“…The addition of internal components can result in high transformation costs, while some internal components destroy the flow field stability. Moreover, if the height of the fountain is excessive, then it will cause problems such as entrainment. , Therefore, the main objective of the present paper is to introduce the gas-phase swirl effect into the spouted bed to make the two-phase mixing more uniform.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of the Swirl Flow Enhancement Effect on the Particle Drying Process in a Novel Spouted Bed

Duan

Zhao

et al. 2021

Ind. Eng. Chem. Res.

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The swirl flow effect was introduced in the spouting bed to change the velocity and volume distribution of the gas phase in different directions, strengthen the radial disturbance, increase the contact area, and optimize the mass transfer, heat transfer, and transmission efficiency of the two-phase flow in the spouted bed. The drying efficiencies of a conventional spouted bed and a spouted bed with an integral swirling blade nozzle (ISBN) under various particle diameters, filling weights, and drying temperatures were experimentally studied. It was found that under the same conditions, the drying activation energy of the ISBN increased, the drying time was shortened, the drying rate increased, the moisture diffusion in the bed accelerated, and the unit energy consumption decreased. When T = 70 °C, d = 1.5 mm, and m = 66 g, the ISBN drying efficiency was the highest.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, if the height of the fountain is excessive, then it will cause problems such as entrainment. 16,17 Therefore, the main objective of the present paper is to introduce the gas-phase swirl effect into the spouted bed to make the two-phase mixing more uniform.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Swirl Flow Enhancement Effect on the Particle Drying Process in a Novel Spouted Bed

Duan

Zhao

et al. 2021

Ind. Eng. Chem. Res.

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“…It is located above the bed surface and its dimensions have already been optimized: [8,9] diameter, DF = 0.2 m and length, LF = 0.5 m. The distance between the surface of the bed and the lower end of the confiner is HF = 0.07 m, which is the optimum one to ensure stable operation. [10][11][12] An atomizer was used as third device, which is a spraying nozzle where pressurized air and liquid are internally mixed. It consist of a mixing body and a nozzle.…”

Section: Materials and Equipmentmentioning

confidence: 99%

Effect of the atomizer in conical spouted beds for drying kaolin suspensions

Aguado¹,

Olazar²

Proceedings of the 22nd International Drying Symposium on Drying Technology - IDS '22

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Drying of suspensions in spouted bed is performed by atomizing the solution onto the top surface of the annulus. However, drying of concentrated suspensions, such as those of kaolin, leads to particle agglomerations.Locating the atomizer at the air inlet pipe might be an alternative, since suspension droplets are fed into the spout, where high particle velocities are attained. However, the atomizer may lead to bed instabilities due to changes in air trajectory. This study analyzes spouted bed hydrodynamics with and without atomizer. Although the atomizer increases the total pressure drop of the system, it hardly changes spouted bed hydrodynamics.

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Sustainable dye extraction: Annatto powder production in a fountain confined spouted bed

Almeida,

Duarte,

Tellabide

et al. 2024

Can J Chem Eng

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This study proposes an efficient and sustainable process for annatto powder production using a fountain confined spouted bed. With widespread applications in industries such as food, pharmaceuticals, and cosmetics, conventional extraction methods face environmental and economic challenges. Our study explores a solvent‐free and eco‐friendly approach using mechanical attrition within a fountain confined spouted bed, offering a cost‐effective solution for annatto cultivation. We systematically investigated the impact of four parameters—fountain confiner position and length, draft tube diameter, and airflow velocity—employing experimental design, multiple regression analysis, particle swarm optimization, and computational fluid dynamics–discrete element method (CFD‐DEM) simulations. The proposed optimization condition shows significantly higher collision intensity, improving annatto powder production compared to other central composite design tests. This study contributes to developing of a sustainable and economically viable method for dye production, with potential implications for annatto‐producing regions globally.

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Design Factors in Fountain Confined Conical Spouted Beds

Cited by 11 publications

References 36 publications

Experimental Investigation of the Swirl Flow Enhancement Effect on the Particle Drying Process in a Novel Spouted Bed

Experimental Investigation of the Swirl Flow Enhancement Effect on the Particle Drying Process in a Novel Spouted Bed

Effect of the atomizer in conical spouted beds for drying kaolin suspensions

Sustainable dye extraction: Annatto powder production in a fountain confined spouted bed

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