Re: boka construction started...but
- --- In firstname.lastname@example.org, "tracker0945" <tracker0945@...> wrote:
>That will work fine. A lot of distillers do that.
> I was also worried a little about the same problem of the open top and
> possible vapour escape, so what I have done is to place part of a pot
> scrubber in the column, within and around the very top of the condenser
> just to make sure that if any vapour did venture that high, the
> scrubber should catch it. It should also help out if any stray breeze
> comes my way.
> Haven't tried it yet but won't be long now, just have to finish my
- Well, the point is that the pipe does not have to be submerged
entirely. It is enough that only part of the pipe opening is below
the liquid level - enough to ensure liquid flow to the valve. That
allows using smaller liquid reservoir which has been shown to have
many benefits. It is also a good idea to have the valve as close to
reservoir as possible, this minimizes the liquid amount in the pipe.
--- In email@example.com, Tony T <tonkyman1979@...>
> Hi Riku,
> I don't know if what you are saying is true or not
> because I'm no still designer. Alex warned me that the
> take-off tube needed to be below the liquid level and
> since he designed it I just took his word for it. I
> just mindlessly followed what he said cause I didn't
> know enough to question him. My columns work very well
> the way they are so I was just passing it along.
> There are so many things I don't do well but I follow
> instructions to the letter.
> When I built my column I didn't have any copper plate
> to use so I cut a short section of 2 inch copper pipe
> in half and hammered it out flat, it worked pretty
> Have fun and be safe,
> --- abbababbaccc <abbababbaccc@...> wrote:
> > Not really. It is actually beneficial to minimize
> > the volume in that
> > liquid reservoir. Less mixing of heads and sharper
> > cut. You just have
> > to make sure that liquid flows to needle valve and
> > minimize the volume
> > of liquid above the valve.
> > Cheers, Riku
- Nope, the valve opening needs to be submerged. The valve is normally
below the actual reservoir so it is enough to just provide liquid
flow to the valve. Then again, vapor can flow through if you are
running your still too fast.
--- In firstname.lastname@example.org, "Brendan Keith" <bkeith@...>
> The take off exit hole would need to be submerged, otherwise you'd
> vapour coming out that tube.which will
> However, the lower the angle, the less volume will be trapped,
> minimize comingling of different fractions.hole and
> A simply bit of trig will decide the optimal angle, based on a 3mm
> a plate 27mm across.
> 16 degrees?
> Brendan Keith
Thanks for explaining that. What you said makes
perfect sense. I think I will rebuild the top of my 4
foot column with a lower angle and move the valve
placement a bit closer to the bottom of the plate
(it's about 3 inches away now).
I'm getting 95% stuff now and I know that little
things make a huge difference when you get up to the
higher percentages so this may just be the ticket.
From your description above I'm leaving several ml of
un-refluxed (or lightly refluxed) liquid in the plate
and take-off tube.
It took a very long time for me to get my first still
to do any better than 93% and it was small details
that helped me get the last 2%. Things like making
sure the returned liquid goes down the center of the
packing and not channel to one side or the other. Even
keeping the liquid moving down the center of the
column requires little things like the column being
level and the packing being even and not to tight. I
can see where reducing the volume at the plate and
valve could be a good thing ------ Thanks Riku you
guys are so smart.
--- abbababbaccc <abbababbaccc@...> wrote:
> Well, the point is that the pipe does not have to be____________________________________________________________________________________
> entirely. It is enough that only part of the pipe
> opening is below
> the liquid level - enough to ensure liquid flow to
> the valve. That
> allows using smaller liquid reservoir which has been
> shown to have
> many benefits. It is also a good idea to have the
> valve as close to
> reservoir as possible, this minimizes the liquid
> amount in the pipe.
> Cheers, Riku
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- I was a little worried when I built mine, I only used 2 mtrs 6 mm copper coil so I checked the temp of the the air as it exited the column . It was about 40 c if my memory is correct 1000 watt powerAllan
tracker0945 <tracker0945@...> wrote:I was also worried a little about the same problem of the open top and
possible vapour escape, so what I have done is to place part of a pot
scrubber in the column, within and around the very top of the condenser
just to make sure that if any vapour did venture that high, the
scrubber should catch it. It should also help out if any stray breeze
comes my way.
Haven't tried it yet but won't be long now, just have to finish my
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