In order to improve the fluidization quality of wide-size-distribution (WSD) particles in a spouted bed reactor for the production of polysilicon, a conical distributor with one central gas inlet and six auxiliary inlets was designed and applied in a cold-model reactor to form a spouted fluidized bed. The effects of the central and auxiliary gas velocities on the solid holdup were studied in the gas distributor region. The hydrodynamic behaviors inside the conical distributor were analyzed by pressure fluctuation in the time domain (standard deviation) and the frequency domain (power spectral density, PSD). The gas distribution was measured by the gas tracing method. It was found that the auxiliary gas feed significantly re-distributed the solid particles and effectively improved the fluidization quality; the dead zone phenomenon was well suppressed even at a low superficial gas velocity. Based on different flow behaviors, a regime map of fluidization was determined for fixed bed, bubbling bed, spouted bed, and spouted fluidized bed regimes. These results provided guidance for the reactor design because the gas and solid distributions would significantly affect the deposition efficiency of polysilicon.

为提高多晶硅生产喷射床反应器中宽粒径分布（WSD）颗粒的流化质量，设计了一种带有一个中央进气口和六个辅助进气口的锥形分布器，并应用于冷模反应器中。形成喷射流化床。在气体分布器区域研究了中心和辅助气体速度对固含率的影响。通过时域（标准偏差）和频域（功率谱密度，PSD）中的压力波动分析锥形分配器内的流体动力学行为。通过气体示踪法测量气体分布。发现辅助气体进料显着地重新分布了固体颗粒，有效地提高了流化质量；即使在低表观气速下，死区现象也能得到很好的抑制。根据不同的流动行为，确定了固定床、鼓泡床、喷射床和喷射流化床的流化状态图。这些结果为反应器设计提供了指导，因为气体和固体的分布会显着影响多晶硅的沉积效率。