Regarding the positions of the inlet and outlet ports of the forced circulation evaporator
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I’ve seen that in some forced-circulation evaporators, the feed inlet is located above the discharge outlet, while in others it’s below the discharge outlet. Is there any difference between these? What are their respective advantages and disadvantages?
You are referring to falling-film evaporators, right? There are those with rising film and those with falling film. Forced-circulation evaporators are all of the upward type, mainly to improve heat exchange efficiency: in such evaporators, steam is introduced from the top while condensed water is discharged from the bottom. To achieve counter-current heat exchange, the feed should enter from the bottom and the product should exit from the top.
I’m sorry, my question is a bit unclear. It should be about the circulation pipe being connected to the separation chamber; what are the differences in the heights of the two ends of this circulation pipe, and what are the advantages and disadvantages of each?