In having who is clear about rectification tower must in who is clear about rectification tower, want to there is circumfluence? How is the word that do not have met?

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Knowing these two kinds of craft distinguish rectification and distill greatly is circumfluence link, rectification has this one link, and distillation is done not have. Also be the word that says to regard rectification as the tower, must have circumfluence, cannot achieve certain detached level otherwise. But is everybody right why must rectification tower have the reason of circumfluence to understand?

The circumfluence in rectification tower basically has two parts to form, it is the fluid photograph circumfluence of cat head, still having one share is the gas phase circumfluence that vaporization of tower boiler part causes. Be their existence, just formed contact of two-phase of steam, fluid to pass qualitative, become the basis that rectification process is able to have continuously. If cat head does not have fluid photograph circumfluence, or it is tower bottom is done not have again boil implement generation vapour circumfluence, so the enrages fluid to passed qualitative meeting to lack interaction one party on rectification tower tray, this meant the separate action of tray to do not have. Accordingly, of circumfluence fluid chase board drop to be chased with steam board the requirement that rising is implementation rectify, both be short of one cannot.