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DistillaMI

Getting < 190 off Still, Having Issues.

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13 hours ago, Odin said:

Too high abv in a boiler is dangerous.

What's the basis for this?  Even 30%, once even slightly warmed (45c/113f) will flash and even sustain fire.  There might be plenty of other reasons for doing it, but IMHO - the 30% is safe meme is an internet myth.

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No, that's not what I am talking about. Its the potential of ethanol blockage I don't like.

Regards, Odin.

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On 7/9/2016 at 11:40 AM, DistillaMI said:

Hey guys,

Any advice on getting < 190 on a 15 plate reflux still? It's been such a pain for me, but I would like any tips on making it a bit easier to achieve.

I normally add about 315-330 gallons at around 125-135 proof, heat ups are about 2.5-3 hours, all plates active and bubbling, easy to pull 188, that last few points though are a pain, any advice?

 

Having the exact same issue. 126 gal kettle,  20ft 18in reflux column with 2 dephs charged at 40-50%. We've tried just about everything. 

 

On 2/15/2017 at 4:49 PM, bluefish_dist said:

I am a firm believer in the 20x diameter for packed to get a reliable neutral at a decent take off rate or 20 ish plates.   I struggled when I first started since I was less than that.   Added more height and more efficient packing which fixed the problem.   

I think that home distillers can get a claimed 190 for two reasons, using uncalibrated Hydrometers and with a 2" column it's a lot easier to get to 20 X the diameter as its only 40".  6" is a full 10 ft for starters.   The only way to do it with a tall still is to move the column next to the still.   I have seen a few setups with the column not in line but never run one. 

This intrigues me though. Based on what you are saying, our column is way too tall for the given diameter. Is our only option left to start trying packing??

 

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If you have a 20 foot 18" in diameter column it's not 20x the diameter in height. You would have to add another 10 ft to achieve 20x.   18x20/12=30 ft.   I would think with an 18" column plates would be a better idea.  How many plates do you have ?

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1 hour ago, bluefish_dist said:

If you have a 20 foot 18" in diameter column it's not 20x the diameter in height. You would have to add another 10 ft to achieve 20x.   18x20/12=30 ft.   I would think with an 18" column plates would be a better idea.  How many plates do you have ?

Correct. we have 18 plates, no bubble caps. The column is split with 7 plates on the first and 11 on the second. The dephs on each are pretty sizable too.

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On ‎3‎/‎6‎/‎2017 at 0:58 AM, Odin said:

No, that's not what I am talking about. Its the potential of ethanol blockage I don't like.

Regards, Odin.

Please explain "ethanol blockage"   You did try a couple of posts back but it doesn't satisfy my scientific curiosity.

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12 hours ago, DrunkenMoose said:

Correct. we have 18 plates, no bubble caps. The column is split with 7 plates on the first and 11 on the second. The dephs on each are pretty sizable too.

Split column that isn't returning reflux from the final column to the top of the preceding column will have lower distillation efficiency than an equivalent single column.

 

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2 hours ago, Silk City Distillers said:

Split column that isn't returning reflux from the final column to the top of the preceding column will have lower distillation efficiency than an equivalent single column.

 

It makes sense. The bottom of the second column returns to the kettle currently.. Please correct me if im wrong but it sounds like the general consensus is that we need to add surface area (packing) in order to off set both our column height to diameter ratio, as well as our having a split column with no reflux return from the second to the first.

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