Development of a semi-empirical model for droplet size determination of a three-channel spray nozzle for pellet coating based on the optical method concept
| Autor: | Sara Vidovič, Alan Bizjak, Anže Sitar, Matej Horvat, Biljana Janković, Iztok Golobič |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
scale-up
three-channel nozzle fluid bed pellet coating droplet size design of experiments dimensional analysis udc:66.02:615 načrtovanje poskusov Chemical technology Process Chemistry and Technology prenos z laboratorijskega na industrijski nivo Bioengineering dimenzijska analiza TP1-1185 Physics::Fluid Dynamics Chemistry trokanalna šoba velikost kapljic Chemical Engineering (miscellaneous) vrtinčnoslojno oblaganje pelet QD1-999 |
| Zdroj: | Processes, vol. 10, no. 1, 86, 2022. Processes, Vol 10, Iss 86, p 86 (2022) Processes; Volume 10; Issue 1; Pages: 86 |
| ISSN: | 2227-9717 |
| Popis: | The purpose of this study was to investigate the droplet size obtained with a three-channel spray nozzle typically used in fluid bed devices and to construct a semi-empirical model for prediction of droplet size. With the aid of a custom-made optical method concept, the impact of the type of polymer and solvents used through dispersion properties (viscosity, density, and surface tension), dispersion flow rate, atomization pressure, and microclimate pressure on droplet size was investigated. A semi-empirical model with adequate predictability for calculating the average droplet size (R2 = 0.90, Q2 = 0.73) and its distribution (R2 = 0.84, Q2 = 0.61) was constructed by employing dimensional analysis and design of experiments. Newtonian and non-Newtonian dispersion and process parameters on laboratory and on production scale were included, thereby enabling constant droplet size irrespective of the scale. Based on the model results, it would be possible to scale-up the atomization process (e.g., coating process) from laboratory to production scale in a systematic fashion, regardless of the type of solvent or polymer used. For the system investigated, this can be performed by understanding the dispersion properties, such as viscosity, density, and surface tension, as well as the following process parameters: dispersion flow rate, atomization, and microclimate pressure. |
| Databáze: | OpenAIRE |
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