Abstract A fluidized bed has the advantages of treating large flows, intensifying mass and heat transfer, and lowering costs. This study proposed a cyclonic fluidized bed packed with spherical activated carbon adsorbents for volatile organic compounds adsorption. The fluidization and self-rotation of the AC particles in a 25 mm cyclonic fluidized bed were studied with high-speed camera testing technology. The effects of the particle movement on the adsorption efficiency of toluene were also tested. The results show that most of the particles at the inlet side of the cyclonic fluidized bed were moving up when the inlet airflow rate was greater than 2.0 m3/h. The particles began to move in clusters when the relative packing height increased to a critical value of 0.57. Increasing the gas flow rate and the diameter and height of the core column will increase the self-rotation speed of the total particles. The maximum self-rotation speed of spherical adsorbents reached 1700 rad/s at the inlet flow rate of 2.5 m3/h. In the case of the same axial velocity of the gas phase in the upper space of the core column, increasing the particle self-rotation speed can slightly improve the adsorption efficiency. The maximum adsorption efficiency reached 99% when the inlet flow rate is 1.0 m3/h with relative packing height 0.65.

中文翻译：

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球形吸附剂流化和自旋对旋流流化床中VOCs去除的影响

摘要 流化床具有处理大流量、强化传质传热、降低成本等优点。本研究提出了一种填充有球形活性炭吸附剂的旋风流化床，用于吸附挥发性有机化合物。用高速相机测试技术研究了 AC 颗粒在 25 mm 旋流流化床中的流化和自旋转。还测试了粒子运动对甲苯吸附效率的影响。结果表明，当入口气流速度大于2.0 m3/h时，旋流流化床入口侧的大部分颗粒向上移动。当相对堆积高度增加到临界值 0.57 时，颗粒开始成簇移动。增加气体流速和芯柱的直径和高度会增加总颗粒的自转速度。在入口流速为 2.5 m3/h 时，球形吸附剂的最大自转速度达到 1700 rad/s。在芯柱上部空间气相轴向速度相同的情况下，提高颗粒自转速度可以略微提高吸附效率。当入口流速为1.0 m3/h，相对填料高度为0.65时，最大吸附效率达到99%。提高颗粒自转速度可以略微提高吸附效率。当入口流速为1.0 m3/h，相对填料高度为0.65时，最大吸附效率达到99%。提高颗粒自转速度可以略微提高吸附效率。当入口流速为1.0 m3/h，相对填料高度为0.65时，最大吸附效率达到99%。