Hydrodynamics of two- and three-phase systems in an agitated vessel with two agitators

IF 0.7 4区工程技术 Q4 CHEMISTRY, APPLIED

Polish Journal of Chemical Technology Pub Date : 2024-07-12 DOI:10.2478/pjct-2024-0013

Magdalena Cudak

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Abstract

The effect of the agitators configuration, the agitator speed, the volumetric gas flow rate, the sucrose concentration in aqueous solution, and the yeast suspension concentration on the hydrodynamics of two- or three-phase systems in an agitated vessel with two agitators has been presented in this paper. The gas hold-up and the average residence time of the bubbles were measured in agitated vessel with a liquid height of H = 2D and the internal diameter of D = 0.288 m. The study was carried out for gas-liquid and biophase-gas-liquid systems, where the gas phase was air, the liquid phase was distilled water or an aqueous solution of sucrose (c = 2.5% mass., 5% mass.), and the biophase was a suspension of Saccharomyces cerevisiae yeast (ys = 1% mass.). The research results were analysed taking into account the influence of the type of the upper or lower agitator, agitator speed, gas flow rate, and type of liquid in the system on the gas hold-up and the average residence time of the gas bubbles. The experimental results were mathematically described.

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带两个搅拌器的搅拌容器中两相和三相系统的流体力学

本文介绍了搅拌器配置、搅拌器速度、气体体积流量、水溶液中蔗糖浓度和酵母悬浮液浓度对带有两个搅拌器的搅拌容器中两相或三相系统流体力学的影响。研究针对气-液系统和生物相-气-液系统进行，其中气相为空气，液相为蒸馏水或蔗糖水溶液（c = 2.5%质量分数，5%质量分数），生物相为酵母悬浮液（ys = 1%质量分数）。在分析研究结果时，考虑了上搅拌器或下搅拌器的类型、搅拌器速度、气体流速和系统中液体类型对气体截留和气泡平均停留时间的影响。对实验结果进行了数学描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polish Journal of Chemical Technology CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

4.5 months

期刊介绍： Polish Journal of Chemical Technology is a peer-reviewed, international journal devoted to fundamental and applied chemistry, as well as chemical engineering and biotechnology research. It has a very broad scope but favors interdisciplinary research that bring chemical technology together with other disciplines. All authors receive very fast and comprehensive peer-review. Additionally, every published article is promoted to researchers working in the same field.