对液龄分布函数定义的思考及其推论

Ponderation and Deduction on Definition of Exit-age Distribution Function

在对液龄分布函数定义中存在的问题进行分析的基础上 ,提出了在一般流量的情况下 (即流量是时间的函数时 )液龄分布函数必须以“进入”物质来定义 .进一步得出一个十分重要的推论 :液龄分布函数是一个二元函数 .它为解决变流量反应器 (如序批式反应器等 )

On the basis of analyzing the problems in definition of the EDF (exit-age distribution function),we propose that the EDF must be defined with 'inflow' in universal case,i.e.,when flow rate is a function of time.Furthermore,the profound deduction indicates that the EDF is a dualistic function,which provides the ground for the calculation of HRT (hydraulic retention time) for such reactors as SBR (sequencing batch reactor) etc.