为数众多的计算颗粒初始流态化速度的公式大体上分为三类:第一类以Ergun公式为基础,引入经验系数加以修正;第二类以某种流体力学关系为基础;第三类属于纯经验公式。这三种类型中,以第一类式子有较大范围之Ar适应性,比较适用。本文提出的计算式子也属于Ergun型,从目前掌握的实验数据看来,比工程界广泛应用的Wen and Yu式子用于计算液-固流态化系统有更高的精确性,而且对球形与非球形颗粒都适用。
During the preparation of the iodide-iodate solution I - was oxidized,which caused large deviation of calculated segregation index from experimental value.In this paper, the concentrations of I-3,I- and I2 in as-prepared solution were determined through concentration analysis of I- 3 by spectrophotometer, and then the oxidized amount of I- was calculated. A modified expression of segregation index for iodide-iodate reaction system wa s deduced and verified by experiments, indicating that the deviation between exp erimental results and the modified expression was within ±15%.
