Re: CM theory
- That seems to be the VM/CM combo I sketched. To use it for neutral
alcohol it's easiest to run at full cooling to both condensers and
operate the VM gate/ball valve to controll your takeoff rate. That
means after equilibrium is reached open the valve a bit to get ~1
drop / sec and collect untill the stuff coming out is pure ethanol.
After that open the valve more and distill as usual.
Three things to note while building this:
The cap need to be tight, the ventilation is via CM outlet.
Add a collar below the VM takeoff.
The reflux condenser need to be big enough for full-reflux operation.
I wouldn't bother myself with theoretical reflux ratios. Experiment
with the valve to get a feeling for proper takeoff rates. The
required reflux ratio is non-linear function throughout the run, so
you can't stay at the optimal RR unless you use ARC.
--- In firstname.lastname@example.org, "richardt2005"
> I'm starting construction of a cooling managed still, likely per
> Riku's page 20 sketch. It's intended for both pure ethanol
> production, and as a pot still for fruit brandies.
> In it'e ethanol mode I want to be sure I understand the theory.
> understand it, I use full cooling in the collumn whilestabilizing. I
> then reduce cooling in the column, while maintaining full coolingin
> the product cooler, until I achieve the take-off rate that Iwant.
> I'm aiming for a 90% RR.total
> Here's the part that I'm unsure of. How do I know that what I'm
> taking off in product is only 10% of the vapor? Do I calculate
> vaper per minute, based on heat input, and aim for 10% of that?