Internal Reflux Still: Modification questions
- I have decided on using the internal reflux design located at
http://www.moonshine-still.com/, but i was wondering what adverse
effects (if any) would be noticed from the following modification:
Since 2" copper pipe is 40% more expensive than 1.5" copper pipe, i
want to reduce the pipe diameter dimensions used. This means that
where 2" pipe is called for i will now use 1.5" pipe, where 1.5"
pipe is called for i will now use 1" pipe, etc.
The reflux tubes going through the column will remain .5".
I think I saw a picture of someone who has done this, but dont
recall where I saw it.
What other design modifications are suggested if I choose to go this
route (i.e. longer column? longer condenser?). Should i do this at
all, or just bite the bullet and pay the extra $ for the 2" copper.
Thanks in advance.
> Should i do this atI'd just keep it it at 2" - that way its a well proven diameter, which will
> all, or just bite the bullet and pay the extra $ for the 2" copper.
work well for a good range of heat sources. 1.5" will work, but it will
flood earlier at lower heat inputs, the scrubbers are fiddlier to load &
need cleaning more often. What I would change is the condensor - theres no
reason for this to be in a 3" sheath - make it out of 2" as well, and dont
valve both outlets, only the one that you collect from. Have the return
back to the column as an overflow with its inlet a little higher than the
collection one, and hence not needing control. Given that you're only
planning on building one still, and making it a good one, pay the extra $.
It will soon repay for itself.
- In a message dated 12/31/02 6:14:06 PM Pacific Standard Time, all5n@...
<< Should i ... just bite the bullet and pay the extra $ for the 2" copper. >>
howdy, I built the 2" internal reflux (with the pass thru pipes) and
have had no problems with it since modifications were added. I used 1 1/2"
after the turn at the head and 3/4" inside the water jacket condenser. There
is some disagreement as to the efficiency of this design, but I get 94% about
every time (unless I hurry it) and would get a higher % if the column was
longer. I think 3 1/2 feet would work better than my just under 3 feet. I
took a picture of the modification in progress and have it attached to this
note. The insulation is now replaced and the lyne arm is pointing the correct
way. The valves are what's made this still much more effective and easy to
run. When the head temp rises to 80C I shut it down since all the ethanol has
left the boiler.
I do want to build the valved reflux someday to experience the difference
between the two. I hear it's a better machine.
Another thing is to recirculate your coolant. It's a real joy to have
lots of water running thru the condenser and not worry about the water bill
or the well running dry.
And don't forget to use Silver Solder. Good luck!