I would get 6" more than what you need on your lines just so that you have a little bit of give. Other than that I would measure exact distances.
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Just tried daisy chaining them. Similar situation and I got 1.8lb a minute compared to 3.6lb with two independent lines in the beginning.
I have my tanks sitting in a garbage can that is insulated and stuff with dry ice and two coils in coolers with ice I’m not sure how I would get them much cooler besides a slurry and I found that not to be cost effective.
I mean I originally got 3.6lbs a minute for over half of the recovery so I think it’s got to be a combination of the discrepancy from the water bath temp and the actual temp and as there’s less of the jacketed area touching the remaining solvent it’s not hot enough. I’m going to bump my water heater up to 50c and see if it’ll maintain the recovery speed.
Also I did lower a turkey probe through my valve into some oil that I had recovered at 37c and left the water flowing and it was 26c 15 minutes after I was done recovery
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I like to purge my tank one more time about halfway through recovery… it seems it slows down about halfway. I close the valves let everything sit for sec. then vent off the psi outta the solvent tank… then when I open it back up the solvent in the collection goes into a rapid boil and most the time after the purge the tank slams down to -30hg
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Why wouldn’t you got back to two lines and keep the temps low instead?
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How many kw of heating power do you have
Even though the math says he should have an excess of 9kw. But, in the beginning I can definitely see him hitting the numbers he got. Which is also why his water heater cools down during recovery.
@Infoseeker does your water bath heater have an open lid that you can see the heating elements and circulation pump kinda like the top of something like this, not the same model of course.
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Yea I’m switching back to the two coils.
That is similar to the water heater I am using. It cools down in the beginning but is back up to temp in probably around 10 minutes or less but I am still recovering 3.6lbs a minute when it drops.
I’m trying to figure out why it slows down through the run though. One thing I noticed when I daisy chained the coils together is only the first coil lost ice while recovery the second one stayed relatively the same which makes me think I’m getting it adequately cold. And my solvent tanks don’t even lose ice during recovery.
My best guess is that as the solvent level drops there’s less touching the jacketed part so less surface area is boiling and running my recovery at 37c/98.6f isn’t transferring enough heat to maintain the level of recovery as the pressure in the tank starts to go negative. That’s why I wonder if bumping the temps up will help speed up recovery as it slows down
I need to fashion one of those dipstick probe to check internal temp
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careful…if you don’t turn it back down as the pool warms you’ll wreck your product.
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Buy a couple inexpensive sous vide from Amazon, or wherever you want, they usually have about 1kw of power. Put them in the water bath of your heater and set them to the same temp as desired. Now you’ll have a couple/few extra kw of power. Don’t go hotter, it will naturally slow down towards the end, anyway.
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hey buddy so we are running a 10lber this weekend w 2 coils one for each line, the collection pot has 2vakves so it’ll work perfect do you suggest changing the lid of the sieve from 1in 1out to 2inn1outn w a t fitting or how would you suggest to hook it up to the sieve for 2 lines
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If you’re running a 3” sieve…
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could we not use a T to get by 2 in to 1
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That would be a question for @Dred_pirate or @Boomtownpharms … I honestly think the vapor path being T’d into the sieve would create a sort of choke point because you’re going from 2x 1/2” paths to 1, then opening up to the sieve. I could be wrong though.
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If you use a T it will work by you will not get as much flow as you would with two outs. Unles u have a vapor hog or a corken or some other beast.
Passive you want to keep the path clear and flowing. A ‘T’ will work but it will also bottleneck.
I wrangled up a mini manifold to allow for better flow out of my corken and into 2 discharge coils.
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Use lids with two openings in and out. Both going into one will cause restrictions
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ok we gonna start w. 1/2inch lines a double coil(single coil double length maybe)… tank in slurry and coil in slurry just not quiet as cold
then I’m gonna try a run w tank on dry ice no slurry see what is fastet and easiest…
so w single line and double coil 1/2 lines I should be able to recover 48lbs 70/30 in about 45 min?
Gonna let the collection build some pressure before starting for good push and since tank will be empty we will vac it down before starting
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You all got me curious. I have a 1/4" coil I bought for an injection coil. I have an open 1/4 port on my collection pot. I don’t have an extra mol sieve. Let’s just see. It worked great!. I’ll order a 3/8" coil set and convert a spool to a sieve. Passive is so peaceful. Grateful not to listen to the recovery pump chugging along.
I would use just normal butane and not the blend
You could build a manifold, out of tee’s.
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So I’m running the dual coil set up now. My recovery path is 1.5” tube out the top of my collection, goes directly into a 3x18” mol sieve, and then it’s split into two 1/2” ports using the 3” USA Lab cap posted above. 13kw water heater. This thing rips compared to my old set up (1/2” line to mol sieve to 1/2” coil)
I’m experimenting with different slurry, I’m sure this is obvious, but I feel like you can’t put the coils in a slurry unless your tank is also in a slurry because the coils become colder than the tank? Could be wrong, anyone know? @StoneD did you experiment with this yet?
secondly, I put the tank in the slurry, and coils on dry ice no slurry. Wasnt going as fast, so tomorrow I’m going to try tank and coils in slurry and will report back. Hoping at that point we see the 3lbs per minute. Been hard to calculate cuz we got a million things going but I honestly think we’re already close to that. Running about 60lbs of butane through 10lb column and our start to finish time is about 40-45 minutes injection to recovery.
Is vacuuming the tank down before recovery also necessary to achieve a faster recovery? I was hoping having it in a packed slurry would create enough vacuum and the coils being cold enough would make it so it’s not warm butane coming in
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