Computational modeling and experimental investigation of aqueous potassium carbonate droplets in superheated steam flow

Chauhan, Vijay; Guðjónsdóttir, María; Sævarsdóttir, Guðrún

doi:10.1007/s00231-019-02781-0

Heat Mass Transfer

2019

DOI: 10.1007/s00231-019-02781-0

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Computational modeling and experimental investigation of aqueous potassium carbonate droplets in superheated steam flow

Vijay Chauhan

María Guðjónsdóttir

Guðrún Sævarsdóttir

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2022

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“…The model included droplets breakup and trajectory simulation, heat transfer between steam and droplets, droplets evaporation and boiling point elevation due to salt concentration within the droplets. The model does not take into consideration further droplet drying in the SHS; nevertheless, it provides a mathematical model of droplets flow and evaporation in SHS confirmed by experimental results [45]. Ducept et al, 2002 [46] elaborated the 2D CFD model of the SHS spray dryer and verified the results of the simulation with experimental data obtained on the pilot SHS spray dryer.…”

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Superheated Steam Spray Drying as an Energy-Saving Drying Technique: A Review

2022

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Drying is an extremely energy-intensive process. Superheated steam as a drying medium can improve the energy efficiency of the drying processes. In superheated steam drying, waste heat can be recovered by condensing the exhaust steam or raising its specific enthalpy. Spray drying is widely used in industry, even though its energy efficiency is often low. Substitution of air by superheated steam as a drying medium in a spray dryer may reduce the energy consumption of the drying process by 20–30%; moreover, if excess steam generated by moisture evaporation is upgraded to a higher temperature level and reused for drying, the energy demand could be decreased by even 80%. A literature review showed that superheated steam spray drying was successfully applied for both thermally resistant and a wide range of thermally sensitive materials. Superheated steam drying gives a number of advantages in terms of product properties, i.e., higher particle porosity due to rapid moisture evaporation results in improved powder rehydration properties. Additionally, steam drying may be applied for in situ particle crystallization. Taking into account the advantages of superheated steam drying and the potential application of this technology in spray drying systems, there is a great need for further research in this field. This literature review aimed to present an energy-saving solution, i.e., superheated steam spray drying process, showing its advantages and potential applications, followed by drying kinetics, providing analysis of the research papers on experimental studies as well as mathematical modeling of this drying technique.

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Superheated Steam Spray Drying as an Energy-Saving Drying Technique: A Review

2022

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Computational modeling and experimental investigation of aqueous potassium carbonate droplets in superheated steam flow

Cited by 1 publication

References 18 publications

Superheated Steam Spray Drying as an Energy-Saving Drying Technique: A Review

Superheated Steam Spray Drying as an Energy-Saving Drying Technique: A Review

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