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Connection of Hydrodynamics and Nucleation Kinetics in Dual‐Impeller Crystallizers
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-03-11 , DOI: 10.1002/ceat.202000515 Antonija Čelan 1 , Marija Ćosić 1 , Željko Penga 2 , Nenad Kuzmanić 1
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-03-11 , DOI: 10.1002/ceat.202000515 Antonija Čelan 1 , Marija Ćosić 1 , Željko Penga 2 , Nenad Kuzmanić 1
Affiliation
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The influence of hydrodynamic conditions in dual‐impeller crystallizers at different impeller spacings on nucleation kinetics was investigated. Dual‐pitched‐blade turbine (2 PBT) and dual‐straight‐blade turbine (2 SBT) impeller configurations were used. To analyze hydrodynamic conditions at different impeller spacings, a computational fluid dynamics model was developed and validated by experimentally determining mixing time and power input. Results show that nucleation kinetics in the 2 SBT impeller system is affected by the characteristic microscale parameters. The same was not observed in the 2 PBT impeller system. Also, as a consequence of higher shear stress values, smaller but less agglomerated crystals were obtained in 2 SBT impeller systems.
中文翻译：
双叶轮结晶器中流体力学和成核动力学的联系
研究了在不同叶轮间距下双叶轮结晶器中的流体动力学条件对成核动力学的影响。使用了双桨叶涡轮（2 PBT）和双直叶涡轮（2 SBT）叶轮配置。为了分析不同叶轮间距下的流体动力学条件，建立了计算流体动力学模型，并通过实验确定混合时间和功率输入进行了验证。结果表明，2 SBT叶轮系统中的成核动力学受微观特征参数的影响。在2 PBT叶轮系统中未观察到相同的现象。同样，由于较高的剪切应力值，在2个SBT叶轮系统中获得了较小但团聚的晶体。
更新日期：2021-05-17
中文翻译：
双叶轮结晶器中流体力学和成核动力学的联系
研究了在不同叶轮间距下双叶轮结晶器中的流体动力学条件对成核动力学的影响。使用了双桨叶涡轮（2 PBT）和双直叶涡轮（2 SBT）叶轮配置。为了分析不同叶轮间距下的流体动力学条件，建立了计算流体动力学模型，并通过实验确定混合时间和功率输入进行了验证。结果表明，2 SBT叶轮系统中的成核动力学受微观特征参数的影响。在2 PBT叶轮系统中未观察到相同的现象。同样，由于较高的剪切应力值，在2个SBT叶轮系统中获得了较小但团聚的晶体。
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