Drying is an important process found in different industries including spray dry scrubbing as used in flue gas desulphurization. Understanding the fundamental processes in drying requires accurate description of turbulence and drying models, which is important in the design and optimization of new processes. Available research in spray dry scrubbing generally picks a single model to describe drying with the key assumption that it is relevant to the case being studied. This work does not make such an assumption but investigated the applicability of three drying models and three turbulence models in analyzing the drying process in a laboratory spray dry scrubber. Computational fluid dynamics was used to model the process employing the Euler–Lagrangian framework. The results from validated models showed that the investigated hindered drying mechanistic model is superior to the often used d² law and perfect shrinkage models and should therefore be used preferentially in drying applications.

中文翻译：

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实验室喷雾干燥洗涤器中石灰浆干燥的计算流体动力学建模和分析


干燥是不同行业中的重要工艺，包括用于烟气脱硫的喷雾干燥洗涤。了解干燥的基本过程需要准确描述湍流和干燥模型，这对于设计和优化新过程非常重要。喷雾干燥洗涤的现有研究通常选择一个模型来描述干燥，关键假设它与所研究的情况相关。这项工作没有做出这样的假设，而是研究了三种干燥模型和三种湍流模型在分析实验室喷雾干式洗涤器中的干燥过程的适用性。计算流体动力学用于对采用 Euler-Lagrangian 框架的过程进行建模。验证模型的结果表明，所研究的受阻干燥机理模型优于常用的 d² 定律和完美收缩模型，因此应优先用于干燥应用。