In this work, the fluidization characteristics of gas–agglomerated carbon nanotube (CNT) particles flow in a tapered fluidized bed (TFB) without a distributor were investigated between 180 and 680 °C for the first time. The objective of this work was to investigate the effect of temperature on minimum fluidization velocity (U_mf) and dynamic characteristics of gas–agglomerated CNT particles flow at elevated temperature. To this end, the experimental work was divided into two phases. In the first phase, the influence of temperature on the U_mf and the correlations of U_mf for agglomerated CNT particles at different bed temperatures were investigated and obtained. In the second phase, the dynamic characteristics of gas-agglomerated CNT particles flow in the TFB without a distributor at elevated temperature were studied in detail via time-series analysis methods. Experimental results revealed that the U_mf decreased for agglomerated CNT particles with the increase of temperature, and the correlations could be reasonable predicted the U_mf over the range of variables investigated. The inhomogeneous dynamic characteristics were existed in the bed at elevated temperature in the meso-scale due to the stochastic features of small bubbles or cavities movement. Moreover, though the time-series parameters (standard deviation, wavelet energy distribution, and homogeneous index) of the dynamic characteristics were different, the gas- agglomerated CNT particles flow behaviors under different operating conditions showed a high sensitivity to the temperature from the fixed bed to the partial fluidization regime.

在这项工作中，首次研究了在没有分配器的情况下，在没有分配器的锥形流化床（TFB）中流动的气体凝聚的碳纳米管（CNT）颗粒的流化特性。这项工作的目的是研究温度对最小流化速度（U _mf）的影响以及在高温下气体凝聚的CNT颗粒流动的动态特性。为此，实验工作分为两个阶段。在第一阶段中，温度对影响ü _MF和的相关性ü _MF研究并获得了在不同床温下团聚的CNT颗粒的热值。在第二阶段中，通过时间序列分析方法详细研究了在没有分配器的情况下，TFB中气体聚集的CNT颗粒在高温下流动的动力学特性。实验结果表明，随着温度的升高，团聚的CNT颗粒的U _mf减小，其相关性可以合理地预测U _mf在调查的变量范围内。由于小气泡或空洞运动的随机特征，在高温下以中等尺度存在于床中的非均匀动力学特征。此外，尽管动态特性的时间序列参数（标准偏差，小波能量分布和均质指数）不同，但气团聚的CNT颗粒在不同操作条件下的流动行为显示出对固定床温度的高度敏感性。到部分流化状态。