The coaxial mixers enhance the suspension of concentrated slurries in an agitated reactor. In this research work, the complex slurry suspension and dissemination behavior in a coaxial slurry mixing system (comprised of a close clearance anchor rotating with a low speed and an inner axial impeller rotating with a high speed) was analyzed employing ERT (electrical resistance tomography, a non-intrusive flow visualization technique), and computational fluid dynamics (CFD). The numerical models were validated by comparing the axial solid concentration profiles generated using the ERT data and the CFD simulation results. The influences of various important parameters such as the diameter of the inner axial impeller, the inner impeller type, and the inner impeller spacing on the hydrodynamic characteristics of the slurry suspensions in a coaxial mixing vessel were thoroughly analyzed. The radial and axial velocity profiles of solid particles were generated using the validated mathematical models. The assessment of energy loss due to the solid–solid collisions, the particle–fluid frictions, and the particle–vessel wall collisions was conducted. The evaluation of optimum inner impeller clearance and inner impeller diameter is essential to attain a high degree of solids suspension and dissemination in a coaxial slurry mixing system.

同轴混合器增强了搅拌反应器中浓缩浆液的悬浮。在这项研究工作中，使用 ERT（电阻层析成像技术）分析了同轴泥浆混合系统（由低速旋转的密间隙锚和高速旋转的内轴叶轮组成）中复杂的泥浆悬浮和传播行为，非侵入式流动可视化技术）和计算流体动力学（CFD）。通过比较使用 ERT 数据生成的轴向固体浓度分布和 CFD 模拟结果，对数值模型进行了验证。内轴向叶轮直径、内叶轮类型、并彻底分析了内叶轮间距对同轴混合容器中悬浮液的流体动力学特性的影响。固体颗粒的径向和轴向速度分布是使用经过验证的数学模型生成的。对固体-固体碰撞、粒子-流体摩擦和粒子-容器壁碰撞引起的能量损失进行了评估。最佳内叶轮间隙和内叶轮直径的评估对于在同轴浆料混合系统中获得高度的固体悬浮和分散至关重要。并进行了粒子-容器壁碰撞。最佳内叶轮间隙和内叶轮直径的评估对于在同轴浆料混合系统中获得高度的固体悬浮和分散至关重要。并进行了粒子-容器壁碰撞。最佳内叶轮间隙和内叶轮直径的评估对于在同轴浆料混合系统中获得高度的固体悬浮和分散至关重要。