上流式反应器中气体分散性能的研究

在上流式反应器冷模实验装置中，以带圆柱形上升管的多孔板气液分布器为对象，考察了表观气速、轴向高度、上升管直径、固体颗粒形状对气含率分布的影响。结果表明，该气液分布器产生的初始气泡尺寸较大，多为毫米级气泡；气速越大，轴向位置越高，局部气含率的径向分布越不均匀；上升管直径为26 mm的气液分布器的气体分散性能优于上升管直径为48 mm的气液分布器；球形、齿球形和三叶草形固体颗粒对气泡有破碎作用，且三叶草形固体颗粒破碎效果优于球形固体颗粒，使用三叶草均形固体颗粒的填料层上方气含率分布偏差最小。

GAS-LIQUID DISPERSION PERFORMANCE IN AN UP-FLOW REACTOR

The effect of apparent gas velocity, axial height, diameter of riser and shape of solid particles on gas holdup distribution was investigated in cold mold test equipment with perforated plate gas - liquid distributor with cylindrical riser. The results showed that the initial bubble size generated by the gas-liquid distributor was large, mostly millimeter-scale bubbles. The uniformity of the gas holdup distribution became worse with the increase of gas velocity and the axial height. The gas dispersion performance of the gas-liquid distributor with a 26 mm riser is better than the gas-liquid distributor with a riser diameter of 48 mm. The ceramic ball, tooth spherical and clover-shaped particle all had a breakup effect on the bubble, and the breakup effect of the clover-shaped particle is better than ceramic ball and tooth spherical particle. The unevenness distribution of gas hold above the filler layer using clover-shaped solid particles is the smallest.