Static electricity has an important effect on gas–solid fluidized bed reactor fluidization performance. In the process of fluidization, electrostatic interaction between particles will obviously accelerate particle agglomerate formation, which consequently reduces the fluidization performance. Pulsed gas flow injection is an efficient method to enhance particle mixing, thereby weakening the occurrence of particle agglomerate. In this study, the two-dimensional hybrid pulsed fluidized bed is established. The flow characteristics are studied by using the coupled CFD-DEM numerical simulation model considering electrostatic effects. Influences of different pulsed frequencies and gas flow ratios on fluidized bed fluidization performance are investigated to obtain the optimal pulsed gas flow condition. Results show that in the presence of static electricity, the bubble generation position is lower, which is conducive to the particle flow. Pulsed gas flow can increase the particle velocity and improve the diffusion ability. The bubble generation time is different at different frequencies, and the frequency of 2.5 Hz has the most obvious effect on the flow characteristics. Different gas flow ratios have significant impacts on the particle movement amplitude. When the pulse gas flow accounts for a large ratio, the particle agglomerate tends to be larger. Therefore, in order to improve the fluidization effect, the ratio of pulsed gas flow to stable gas flow should be appropriately reduced to 0.5 or less.

静电对气固流化床反应器流化性能有重要影响。在流化过程中，颗粒之间的静电相互作用会明显加速颗粒团块的形成，从而降低流化性能。脉冲气流喷射是增强颗粒混合的有效方法，从而减弱颗粒团聚的发生。本研究建立了二维混合脉冲流化床。利用考虑静电效应的耦合CFD-DEM数值模拟模型研究流动特性。研究了不同脉冲频率和气体流量比对流化床流化性能的影响，以获得最佳脉冲气流条件。结果表明，在静电存在下，气泡产生位置较低，有利于颗粒流动。脉冲气流可以提高粒子速度，提高扩散能力。不同频率下气泡产生时间不同，2.5Hz频率对流动特性的影响最为明显。不同的气体流量比对粒子运动幅度有显着影响。当脉冲气流占较大比例时，颗粒团块趋于较大。因此，为提高流化效果，脉冲气流与稳定气流之比应适当降低到0.5以下。脉冲气流可以提高粒子速度，提高扩散能力。不同频率下气泡产生时间不同，2.5Hz频率对流动特性的影响最为明显。不同的气体流量比对粒子运动幅度有显着影响。当脉冲气流占较大比例时，颗粒团块趋于较大。因此，为提高流化效果，脉冲气流与稳定气流之比应适当降低到0.5以下。脉冲气流可以提高粒子速度，提高扩散能力。不同频率下气泡产生时间不同，2.5Hz频率对流动特性的影响最为明显。不同的气体流量比对粒子运动幅度有显着影响。当脉冲气流占较大比例时，颗粒团块趋于较大。因此，为提高流化效果，脉冲气流与稳定气流之比应适当降低到0.5以下。当脉冲气流占较大比例时，颗粒团块趋于较大。因此，为提高流化效果，脉冲气流与稳定气流之比应适当降低到0.5以下。当脉冲气流占较大比例时，颗粒团块趋于较大。因此，为提高流化效果，脉冲气流与稳定气流之比应适当降低到0.5以下。