L阀控制物料循环的数学模型及其应用

A Mathematical Model for the L-Valve and Its Application in Matter Transfer Control

通过分析Ｌ阀中辅助气流控制颗粒物料循环的机理，建立了一个关于Ｌ阀的数学模型。阐明了Ｌ阀的操作特性，并将本模型应用于流化床物料循环系统的结果与有关实验结果作了比较。

From a study of the mechanism of the L-valve,a mathematical model with the proper-ties of both solids and gases as well as the differential presure gradient and geometric dimen-sions of the L-valve taken into consideration has been developed.A new concept of the upperand lower critical aeration rate for engineering design purpose is proposed;Application of themodel in matter transfer control under zero and negative differential pressure shows a good a-greement between the calculated transfer rate and experimental data.