This study established a cold experimental platform and a mathematical model to examine the gas–liquid–solid three-phase flow in the washing process of the gas–solid flow as it passes through a liquid pool in an entrained flow coal gasifier. It visualized the three-phase flow process and separation of the solid particles, including the bubble motion and particle separation processes. The concentration distribution and separation efficiency of the particles were quantitatively analyzed considering various major influencing factors. The particle separation mechanism was analyzed based on the characteristics of the three-phase flow, and the results confirm that a multi-peak distribution of particle concentration exists in the liquid pool along the axial and radial directions. There is considerable variation in peak particle concentration points with different particle sizes; as particle size increases, the particle separation efficiency also rises. Based on the calculation conditions in this study, the separation efficiencies obtained with particle diameters of 50, 20, and 10 μm were 96.98%, 94.48%, and 87.31%, respectively.

中文翻译：

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气流床气化炉洗涤室三相流的实验与数值研究

本研究建立了冷实验平台和数学模型，研究气固流在气流气流煤气化炉中通过液池时洗涤过程中的气-液-固三相流动。它可视化了固体颗粒的三相流动过程和分离，包括气泡运动和颗粒分离过程。考虑各种主要影响因素，定量分析颗粒的浓度分布和分离效率。根据三相流的特点分析了颗粒分离机理，结果证实了液池中沿轴向和径向存在颗粒浓度的多峰分布。不同粒径的颗粒浓度峰值点存在较大差异；随着粒径的增加，颗粒分离效率也随之提高。根据本研究的计算条件，粒径分别为50、20和10 μm的分离效率分别为96.98%、94.48%和87.31%。