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Connecting two columns

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  • Johan Hemberg
    Hi The higher the column the better the spirits. Often the ceiling is the limit and it s not very practical with a very tall still. But if you use two columns
    Message 1 of 1 , Jan 1, 2003
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      Meddelande
      Hi
       
      The higher the column the better the spirits. Often the ceiling is the limit and it's not very practical with a very tall still. But if you use two columns connected together you can increase the total height. To make it work like one large tall still the reflux from the bottom of the second column needs to be pumped to the top of the first column. Of course you can have separate condensers on every column but that's a waste of reflux. What about pumping the reflux to the top of the first column with the help of an ejector?
      Instead of a condenser at the top of the first column you force the steam through an ejector that sucks up the reflux from the second column and collects it above the ejector, the steam/reflux goes into an expansion chamber and the reflux is passed down with a thin tube down below the ejector. Vapor continuous to the second column.
       
      The vapor may bypass the ejector through the reflux tube, but with the right size in the tubing it maybe is possible, I don't know, does anyone here have experience of ejectors and the physics required to calculate if it is possible?
       
      Johan
       
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