6615Re: [new_distillers] Re: Still improvement question
- Dec 2, 2002In my very limited experience looking at the pic of your still you have no
control over the amount of distillate that you are taking off.
I'd say you need some way of controlling how much you take off. The most
basic is a ball valve but its pretty hit and miss. With a needle valve you
get more accuracy.
If you cut off the amount you take off you force it back down the reflux
column allowing it to redistillate and hence become more pure. You should
also find that as the % becomes higher the head temp will drop. If you
restrict output entirely allowing total reflux the the head temp should
settle at a temp about 78 - 78.5.
----- Original Message -----
From: "Dene Oehme" <waterline@...>
Sent: Monday, December 02, 2002 8:12 PM
Subject: [new_distillers] Re: Still improvement question
> --- In new_distillers@y..., "Dene Oehme" <waterline@o...> wrote:
> > > Hi Dene,
> > > Just some loose ideas...
> > > Fill the column entirely with scrubbers,
> > > Don't insulate the top part of the column.
> > > Don't try to control the boiling temperature of the wash.
> > Thanks Dirk - Giving it all a try now. Will let you know
> > how it goes. I've also lengthened my column to just
> > under 1 metre.
> Ok.....New Question...... I've just run the still with the
> improvements Dirk suggested and the longer fully packed column. It
> ran with a head temp at around 79 - 80oC for most of the run,
> increasing gradually towards the end but never over 88 or so. How
> come I still got a distilate of only 50% average?
> I was measuring alcohol percentage every 60 mils or so and the best
> was the first at just under 80%. The rest were lower, dropping
> proportionally throughout the run even though the head temp was still
> around 80 degrees for most of the run. I thought with the head temp
> around there I should be looking at about 90%. What am I not
> understanding correctly??
> Thanks in advance
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