Eager to learn

[Hawke]

Thermo placement:
The Bokakob mini has gone through several revises. On mine it is placed between the plates where the top plate protects it from direct contact with liquid. (3" dia. x 58" packing height. 1" spacing between plates) Gives me rock solid readings throughout the run. A 0.3*C rise in temp means I'm into the tails.

A standard 15.5 gallon (1/2 barrel) keg makes a great boiler.

[seravitae]

I wouldnt use the pressure cooker for making mash. However, it might totally kick ass for gelatinisation of corn. May speed things up a *LOT*. pressure cookers are good for cooking things hard n fast (and also tasty). Otherwise, mash at stanard pressure (no lid) so you might as well juts get a $10 cooking pot

[junkyard dawg]

good thoughtful questions...

Yes, aerating the wash is a potential source of infection, but in practice this is no problem. An overwhelming dose of yeast takes care of any competing bugs in most cases. St pats sells sterile inline airfilters if you are really determined to use a bubbler. Usually just a vigorous stirring is enough to aerate.

I think you are right about the deflector plate and the thermometer... Place the therm close to the takeoff. Its only a tool to help you drive the still. Its exact reading is not so important, but the changes you observe are. There are many sensory guides to running the still, the temp is just one of them.

I would not use the aluminum pressure cooker as a boiler. I like the stainless beer keg. They come in all sizes...

Good luck

[rad14701]

Welcome to the forums, officially now that you've registered, Thirsty Bob... Your concise questions definitely show that you've been doing your reading and the targeted answers to those questions are proof...

Now, if you've got a few designs in mind it might be worth posting links to them here for review and critique before putting solder to copper... Or, on the other hand, if you have your own design drawn up I'm sure we'd all be willing to give it a once-over as well...

Good luck...

[Thirsty Bob]

Welcome to the forums, officially now that you've registered, Thirsty Bob... Your concise questions definitely show that you've been doing your reading and the targeted answers to those questions are proof...

Now, if you've got a few designs in mind it might be worth posting links to them here for review and critique before putting solder to copper... Or, on the other hand, if you have your own design drawn up I'm sure we'd all be willing to give it a once-over as well...

Good luck...

Thanks rad, and I'm flattered that you used your 1000th post to welcome me. Congrats!

Thanks to all that replied, and encouraged me. It tells me there is much to learn and it is at least as much feel as it is tech.

One thing that wasn't answered was using a HW Heater as a boiler, 'cos they aren't really designed to boil. Good idea or bad idea?

As for my designs, I think I will learn more before subjecting them to all your kind? critiques, but will definitely do so before I cut metal. I think a modified (improved?) Bokakob is the way to go for me. I might even do some automation, but not before I know how to drive the thing manually.

I might start with a cute little parrot beak before I move to the still. Small steps....

There is some irony here. I have spent hundreds of hours working on instrumentation in distilleries around North America and I never learned the basic process.

Oh, what I could share with you guys if I had only asked.

Regards,

Bob

[Thirsty Bob]

Adverse:

Thanks for the help. I'll ponder more.

your only as old as the girl your feeling

So true. I've also learned to not sweat the petty things, but it can be fun to pet the sweaty things.

the SS 1 i am thinking of making in to a dedicated continuous stripping still where the boiling water heats a 1 inch tube loosely coiled down and through the tank top to bottom and a simple float system to keep the boiler full of water

This idea is intriguing. The wort will always have a boiling point less than the water, so vapour will be driven off, but how would you pipe it to allow the vapour to be collected and condensed? It sounds to me like it could me made into a continuous still. Cleaning sounds ugly. Tell me more.

Bob

[Thirsty Bob]

Hawke: Thanks for the feedback.

(3" dia. x 58" packing height. 1" spacing between plates) Gives me rock solid readings throughout the run. A 0.3*C rise in temp means I'm into the tails.

You mention packing and you mention plates. You may have scooped me on my theory about both. How is your column packed? A description would be good, a picture even better. In my limited learning, a 58" column is pretty substantial. What are you using for packing? 58" seems tall for even high purity (not that short columns will give us world peace) Perhaps my quest for a smaller column is a bridge too far.

Also, a .3 deg C rise seems small unless you are talking hearts to tails and even then it seems small, but I have probably missed something.

Like my post title, I am eager to learn.

*edit* Anybody else, feel free to add in with candor. I can take it, I think.

Bob

[minime]

Hawke: Thanks for the feedback.

(3" dia. x 58" packing height. 1" spacing between plates) Gives me rock solid readings throughout the run. A 0.3*C rise in temp means I'm into the tails.

You mention packing and you mention plates. You may have scooped me on my theory about both. How is your column packed? A description would be good, a picture even better. In my limited learning, a 58" column is pretty substantial. What are you using for packing? 58" seems tall for even high purity (not that short columns will give us world peace) Perhaps my quest for a smaller column is a bridge too far.
Also, a .3 deg C rise seems small unless you are talking hearts to tails and even then it seems small, but I have probably missed something.
Like my post title, I am eager to learn.
*edit* Anybody else, feel free to add in with candor. I can take it, I think.
Bob

Bob, Hawke isn't shittin' ya. My long column (60 inches packed) only allows 2/10C increase during hearts collection and the run is over. The quality is the same at the end as it was in the beginning.
Most of use stainless scrubbers but the guys with stainless columns use copper mesh. Long columns allow higher purity or faster takeoff or a compromise between the two. The point is, it gives you options you don't have if your column is too short.

[Hawke]

My packing is right around 4 pounds of structured copper. (rolled into 10 segments, then made into a sausage by using a sleeve of the copper mesh)
When I scaled up the Boka mini to the 3" pipe, I chose to expand the gap between the top and bottom plates to 1". I tend to run it slower than needed, so when I get to the end of the hearts, the temp will rise 3/10 of a degree and the alco-meter just about jumps out of the parrot. (Goes from 96% down to 40% within about 400ml.)
Here's the link to my build http://homedistiller.org/forum/viewtopi ... =17&t=6849

[Adverse Effects]

the SS 1 i am thinking of making in to a dedicated continuous stripping still where the boiling water heats a 1 inch tube loosely coiled down and through the tank top to bottom and a simple float system to keep the boiler full of water

This idea is intriguing. The wort will always have a boiling point less than the water, so vapour will be driven off, but how would you pipe it to allow the vapour to be collected and condensed? It sounds to me like it could me made into a continuous still. Cleaning sounds ugly. Tell me more.

Bob[/quote]

disclaimer
"now kids dont try any of this at home it could be dangerous"

ok well the cleaning will be no trouble at all

you simply remove the still column and head then you insert a normal dish scrubber (the green non metal ones) and hook it up to my work shop compressor and fire away scrubber and any gunk comes out at high speed wash and repeat if needed

i have to say be for you run out and try this "it is an experiment" i dont know if any one else has done any thing like this but i an crazy and will try 20 different things just to see if they work i have all ready built one of the strangest stills here that i dont think no one else on this board has built build thred here
i am guessing an angel of about 10 deg decent maby more out of a 1 inch tube i may even go a bit bigger to 1.5 inch its all fun and mad scientist toys

something like this


if your getting any measurable % of alcohol coming out the bottom you simply slow the rate you are feeding it in

[rad14701]

Not many people are using hot water tanks for boilers these days, mainly due to shoddy construction - at least here in the US... They aren't built to last so the manufacturers have cut corners with both materials and craftsmanship... While some of the water heaters are glass lined they still use cheap attachment fittings which will not hold up to high ABV ethanol... By the time you mess around getting one working you could have just made one from a beer keg, stock pot, or whatever else you can lay your hands on...

[Thirsty Bob]

Guys,

I thought I had addressed all the replies, but I guess I got overloaded with info. My bad!

Rad, re: boilers; I guess I need to go hunting in scrap yards. I would kill to find a copper boiler like Ayay's http://homedistiller.org/forum/viewtopi ... =17&t=8775.

As for Hawke, mimime & adverse:

The narrow temp thing has really thrown me for a loop, but rather than ask stupid questions, I am going to study more and then hopefully ask less stupid questions.

One thing seems clear, a reflux column requires skill, but a pot requires art. I'm glad that moving from a column to a pot keeps most of the work put into a column.

Thanks to all.

I'll be back.

Bob