A novel method for evaluation of spatial characteristics in a gas solid separation fluidized bed

This study investigates the complex spatial characteristics of a gas-solid dense-phase fluidized bed for a separation system. A custom-designed perspex bed, equipped with multi small holes and different distributors, was used to explore gas-solid suspension characteristics. The results show that there is a certain spatial heterogeneity in the density of the gas-solid separation fluidized bed. The spatial heterogeneity of gas-solid fluidized beds is characterized by global and local dependence. An empirical model that predicts the relative solid mass flow rate was proposed. GeoDetector technology (including a factor detector, interaction detector, risk detector, and ecological detector) was first introduced to quantify the spatial characteristics of a gas-solid fluidized bed. The influence of each factor on the spatial heterogeneity of particle solid mass flow rate follows the order: axial position > gas velocity > radial position > air distributor. The interactive relationship between variables on the spatial characteristics of gas-solid separation fluidization shows a nonlinear enhancement. (GRAPHICS)