Atomizers in spray dryers: a review

Campos, Elaine Cristina; Chaves, Diego Henrique de Souza; Souza, Patrícia C.; Sousa, Marco Aurélio de; Birchal, M. A. S.; Birchal, Viviane Santos

doi:10.37591/jotcsta.v8i1.5517

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For food materials, moisture must be reduced to less than 10% to avoid microbial growth that can negatively affect the quality of the dried product (Yilmaz et al 2019, González-Toxqui et al 2020. In spray drying -commonly used in the drying of food, dairy products, inorganic chemicals, ceramic powders and nanoparticles -atomization is the most important step that defines the properties of liquid droplets after spraying, resulting in several forms of the dry product from fine powders to granules (Campos et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Simulation of a single spherical droplet drying considering shrinking and temperature profiles: first drying stage

Chaves

Birchal

Junior

2023

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

A model including simultaneous droplet heating and water evaporation is proposed to simulate temperature, shrinking and mass profiles of a spherical droplet subjected to convective drying, being valid for the first drying stage. Experimental data on drying skim milk and colloidal silica obtained in the literature were used for validation, but there is no restriction in the model that prevents it from being suitable for other materials. There were not significant differences observed concerning to the droplet components (dissolved or insoluble materials). The initial heating time of the particle upon reaching the constant temperature is relatively short (Δt ≈ 7s) for both simulated materials and water evaporation during the first drying stage occurs mostly at the wet bulb temperature of the air. Discrepancy between simulated and experimental values did not exceed 9% for skim milk and 7% for colloidal silica in this first stage, indicating good applicability of the model. Considering the applicability of the model in a more generic way, Whitaker correlation evaluated at the film temperature showed better results. Finally, the small discrepancy found is discussed and some improvements are proposed.

show abstract

Section: Introductionmentioning

confidence: 99%