Re: Column Packing
- Thanks for your advice not being a chemical engineering expert at one
time I was considering a mixture of both SS scrubbers and marbles but
from your comments I will initially try the scrubbers.
Thanks Once Again & Best Regards
--- In new_distillers@y..., css1@h... wrote:
> --- In new_distillers@y..., hydrografix@y... wrote:
> > Hello All
> > Just new to the game and trying to figure out which is the better
> > column packing marble or SS pot scrubbers? Any info is greatly
> > appreciated.
> > Thanks in Advance
> > Bill
> Hi Bill and welcome,
> I tried marbles first in my 15ltr still that has a 2" tower
> and found that with marbles the tower would flood and there
> was a build up of liquid above the marbles that was not
> running back down the tower.I changed to scrubbers and this
> problem was fixed.The still now puts out about 92% average
> no problems.Hope this helps.
> > > Just new to the game and trying to figure out which is the betterSee http://homedistiller.org/refluxdesign.htm
> > > column packing marble or SS pot scrubbers? Any info is greatly
> > > appreciated.
Marbles offer about 50 square meters of surface area per cubic meter.
Scrubbers on the other hand are more like 800-1200 m2/m3. By offering so
much more surface area, the scrubbers give the liquid & vapour more chance
to interact & swap their water-alcohol
Also, marbles, being spheres, take up about 62% of the volume they occupy.
This doesn't leave a lot of room for the vapour & liquid to get past. The
scrubbers on the otherhand probably only take up about 5% of the area.
This means that for the same diameter pipe, you'll be able to run the
scrubbers with a much higher heat input (eg heaps more vapour) (the marbles
will just cause the column to "flood")
Combine these two factors together, and the scrubbers will give a far
better performance than marbles. Scrubbers can achieve in 12cm of packing
what it takes marbles approx 35cm to do. Eg a 1m column packed with
marbles will only do the equivalent of 3+1 distillations, but with