Tray/ Stage的区别

tdl522

What is the difference between stage and tray in a column? isn't it same?


first of all understand what is a stage..an equillibrium stage is one in which  we allow intimate contact between two streams between which mass transfer is   supposed to take place..it is called an equillibrium stage because the leaving      streams are supposed to be in equillibrium(which doesn't happen in reality and   hence the stage efficincy comes in picture)..it provides the suitable residence time for this transfer to take place..once the two leaving streams reach equillibrium no matter however long residence time is provided you are not going to achieve any  further separation..
Now a tray could be one such means of providing this intimate contact..
you can also provide such an intimate contact by using packings..
liquid liquid extraction uses a mixer settler arrangement for providing the same..


请高手发表下自己的看法！

tingyu_001

简单来说，stage可以理解为平衡级，tray是塔板，aspen中在精馏塔模型中，冷凝器和再沸器都被视为平衡级。

tianshanxue

路过，学习一下先