A novel slit-less gas-solid vortex reactor dryer: Experimental validation and scale-up

Singh, Pavitra; Kalita, Pankaj; Mahanta, Pinakeswar; Tamuly, Plabon

doi:10.1016/j.jtice.2021.01.017

Cited by 13 publications

(2 citation statements)

References 31 publications

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“…The turbulent viscosity, μ t,q , is computed as follows: (11) where α* is a coefficient that dampens the turbulent viscosity causing a low-Reynolds number correction; a 1 is the model constant and equals 0.31; F 2 is a function that is 1 for boundary-layer flows and 0 for free shear layers, respectively. The strain rate magnitude S′ is defined as (12) (13)…”

Section: Numerical Modelmentioning

confidence: 99%

“…One example is the application of vortex technology. Gas–solid vortex units (GSVUs) have recently been used for different gas–solid applications including combustion, fluid catalytic cracking, drying, , biomass pyrolysis, , and oxidative coupling of methane. , The positive PI results obtained when vortex units were used for different gas–solid applications raise interest in extending the use of vortex technology to gas–liquid applications. The resulting gas–liquid reactor is termed a gas–liquid vortex unit (GLVU).…”

Section: Introductionmentioning

confidence: 99%

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Design and Optimization of Gas–Liquid Vortex Unit Using Computational Fluid Dynamics (CFD) Simulation

Chen,

Malego,

Van Geem

et al. 2023

Ind. Eng. Chem. Res.

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Due to the exceptional multiphase mixing and mass transfer performance, gas–liquid vortex units (GLVUs) have great potential for solvent-based applications such as CO2 capture. The high gas flow rates needed to provide the energy input for creating the centrifugal field negatively influence the contact between phases and the efficiency of the GLVU. To address this issue, computational fluid dynamics (CFD) simulations are used to optimize the design of the GLVU geometry and its operating conditions. The gas–liquid flow characteristics, contact time, and total energy consumption in different GLVU geometries are analyzed. The effects of geometrical changes including reactor shape, reactor volume, and gas–liquid inlet configuration are investigated. In the optimized GLVU designs, the gas–liquid contact time is increased by more than a factor of 3, while the energy consumption is reduced by 85%, compared to the base case. Structural optimization of a GLVU is an effective route to improve the gas–liquid contact time. The use of CFD significantly accelerates the optimization of the design of a GLVU geometry for subsequent manufacturing.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Gas–Liquid Vortex Unit Using Computational Fluid Dynamics (CFD) Simulation

Chen,

Malego,

Van Geem

et al. 2023

Ind. Eng. Chem. Res.

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Experimental Study of Granular Drying in a Rotating Fluidized Bed in Static Geometry Dryer with Waste Heat Recovery

Yadav,

Singh,

Chauhan

et al. 2024

Springer Proceedings in Physics

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Search for Operating Conditions in the Thermal Pistachio Splitting in Fountain Confined Conical Spouted Beds

Sukunza,

Bolaños,

Tellabide

et al. 2024

Food Bioprocess Technol

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The worldwide consumption of pistachio nuts has been increasing over the last decades due to their high nutritional value. Given that only split nuts are commercialised, the closed-shell nuts, which account for most of the harvested ones, must be split by mechanical or thermal processes. However, there is hardly any information about the splitting mechanism based on thermal treatments. Accordingly, the thermal splitting of pistachio nuts in conical spouted beds has been approached, and the effect of the air inlet temperature, the draft tube aperture ratio and the air inlet diameter on the splitting mechanism has been analysed. Batch drying tests have been carried out in the proposed technology at an air inlet temperature range of 40–120 $${}^{\circ }\text {C}$$ ∘ C using configurations with and without draft tube. The operating temperature and dryer configuration that allows attaining up to 60% of split pistachios and preserving their quality are 80 $${}^{\circ }\text {C}$$ ∘ C , an inlet diameter of 0.05 m and an open-sided draft tube with an aperture ratio of 80%.

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A novel slit-less gas-solid vortex reactor dryer: Experimental validation and scale-up

Cited by 13 publications

References 31 publications

Design and Optimization of Gas–Liquid Vortex Unit Using Computational Fluid Dynamics (CFD) Simulation

Design and Optimization of Gas–Liquid Vortex Unit Using Computational Fluid Dynamics (CFD) Simulation

Experimental Study of Granular Drying in a Rotating Fluidized Bed in Static Geometry Dryer with Waste Heat Recovery

Search for Operating Conditions in the Thermal Pistachio Splitting in Fountain Confined Conical Spouted Beds

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