RE: [Distilling] Re: Hints and tips
>I have a reflux currently, I am using large ballbearings in a gauseHow tall is the column ?
>bag placed in the tower.
>I havent any water cooling in the tower justReflux ratio is used to describe when you return some of the distillate
>the condenser. I don't know what you mean by the reflux ratio, but I
>am getting about 4L@70% in about 3 hrs.
back to trickle down over the packing and back into the pot. You can do
this a number of ways - either condensing all the vapour in a condensor,
then diverting some of it back to the top of the column, or by having some
cooling coils in the top of the column so that a portion of the vapour is
condensed & drops back down. The "Reflux ratio" is the ratio of how
much you return to the column to how much you collect - eg my still
produces about 50 mL per minute of distillate. I return about 40 mL to the
column, and keep about 10 mL. This is a reflux ratio of (40/10) = 4
Why do it ? Its because the reflux running back down over the packing gets
to mingle with the upcoming vapour, and simulataneously strip the vapour of
its water content, and release its own ethanol, so that the vapour becomes
more pure. The greater the surface area for it to spread out over, and the
more reflux happening, the greater your purity will be. This is how you
can get up to 95% purity. The downside is that it takes longer (a cost
well worth paying). If you reflux, but don't have suitable packing, there
will be no improvement. If you have packing, but little reflux, there will
be no improvement.
>I am using 3/4" copper pipeThe more surface area the better for packing. Stainless steel pot scourers
>for the tower going into 1/4" pipe for the run off through the
>condensor. My still is 20L.
>Can you tell me how much space I would need for reflux, and if there
>is a better way to do the packing.
are the best for this. For more details, see
http://www.geocities.com/kiwi_distiller/refluxdesign.htm , and also look at
the photos pages to see how other people have gone about doing it