新型填料结构旋转床流体力学特性

Hydrodynamics Characteristics of a New Type of Packing in a Rotating Packed Bed

以空气-水为工作介质,研究了填料特性、超重力因子、气体流量和液体流量等对不同填料结构旋转床床层压降特性的影响。实验结果表明,离心压降、干床压降、湿床压降与填料的材质、板间距、空隙率等密切相关;床层压降随超重力因子、气体流量的增加而增大,与液体流量几乎无关;在相近的操作条件下,床层压降与文献报道丝网错流旋转床的相近,为逆流床的十分之一;运用最小二乘法对实验数据回归得出了干湿床压降的关联式,计算的干湿床压降与实验值的平均误差小于15%。

Effect of different packing structure, high gravity factor and gas-liquid flux on the pressure drop of rotating packed bed with new type structured packing in air-water system were investigated. The experimental results showed that the pressure drop characteristics of centrifugal, dry bed and wet bed were greatly influented by the packing quality, plate distance and porosity. The bed pressure drop increased with the augment of high gravity factor and gas flux, and almost independent of liquid flux. Compared with the literatures, the pressure drop of the cross-flow rotating packed bed was similar to that of the cross-flow rotating packed bed with wire-gauze packing, and was no more tenth than that of the countercurrent rotating packed bed in the same operational condition. The correlative expressions for the rotating packed bed pressure drop of dry-and wet- bed were obtained by fitting data with least with the experimental results, and square method. The correlative its mean deviation was less than expressions were well agreement 15%.