为可视化研究流化床中的粘结行为,采用石蜡颗粒作为实验原料,动态模拟了D类粘性大颗粒的流化与粘结过程。实验结果表明:由正常流化到死床,可以分成2个阶段;第1个阶段是速度较慢的粘结核的形成及长大阶段,第2个阶段是速度很快地形成粘结块及死床阶段。然后,对压力信息进行了分析,发现采用平均压降来监测粘性大颗粒的早期结团在压力测点选择正确后具有适用性,但不能给出具体的数值变化量来界定粘结的开始及粘结程度。 In order to visualize the bonding behavior in a fluidized bed, paraffin particles were used as experimental materials to dynamically simulate the fluidization and bonding of the large class D viscous particles. The experimental results show that: from normal fluidized bed to dead bed, it can be divided into two stages. The first stage is the formation and growth stage of slow-speeding bonded nuclei. The second stage is the rapid formation of a bond And dead bed stage. Then, the pressure information was analyzed. It was found that the average pressure drop used to monitor the early agglomeration of sticky large particles has applicability after the selection of pressure measuring points is correct. However, specific numerical variation can not be given to define the beginning and Degree of bonding.