Passive Recovery Time

What’s the issue here? You’re having trouble getting all the solvent out of your tank?

Push with n2 on the solvent tank. Once you hit the amount of solvent you want to use, stop the flow from the solvent tank and start pushing N2 at the top of the material column.

Be sure to account for however much solvent is in your injection coils or your line before the material column.

Using n2 for the push let’s you get around the need to chill the collection vessel. The incoming solvent is cold enough that it will help cool your vessel down, and you have n2 to do the pushing to get your solvent there, not just the thermodynamic properties of your solvent

Yea im using 2 solvent tanks with a daisy chain its a 30# bhogart ss and a 50# yellowtop. The yellowtop is hooked to the top of my column and when I turn it on the 30# seems to run out first then it struggles to get the lower half of the yellowtop into the system.

Push with n2 on the bhogart tank as it moves into the yellow 50#

I know the daisy chain tank game well

Well shit that makes sense haha. What about having nitrogen in my solvent tanks then? I have to just have a valve ready to off gas?

So I only have to put dry ice in the coil before my solvent tank on the recovery side?! Thats interesting!

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You’d hopefully have an injection coil and recovery coil. Or are using the same one in reverse. Which can be done with a few extra valves and tee’s.

When you’re done with injection and ready for recovery, you vent the n2 to atmosphere and pull a vacuum on tank or tanks.

If the tank has solvent in it that needs vacuum, I’d suggest keeping your tank on dry ice so that you can “safely” pull a vacuum on it down to -15psi or so.

I don’t suggest you do this whatsoever if you can’t see into the vessel, especially if you’re new to this. Watching @TwistedStill do this the first time made my butt hole pucker

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Your not the first butthole I’ve made pucker…

Sorry…couldn’t help myself…

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Lmao. Had to share that one with the wife.

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I do not have an injection coil going but I was just thinking about adding one actually lol. Ok I can setup something so I can vent the n2 and then vac. I can’t see into either of those tanks and yea when I read that I was in shock lol. I would love to be able to do that but being safe is something I’m really trying to do. Shit the daisy chain tanks im rocking make me nervous since I have about 31#s between both of them right now lol.

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Wait till your daisy chaining 100#

If you aren’t respectfully aware of the dangers you face while extracting, you most definitely shouldn’t be doing it. That’s how you die.

Buy one of these and grab some 3/8 compression fittings for the ends. Great coil for cheap.

https://www.amazon.com/Stainless-Steel-Immersion-Wort-Chiller/dp/B0064ODYKE?th=1&psc=1

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Yea im pretty aware of how dangerous it can be i respect this very much and take my time with everything. Man daisychaining 100#s lmao thats insane! Well glad to hear its a little more common than I thought.

Im currently keeping both tanks in a deep freezer until I blast. Mostly because I wanna keep the pressure down. Can I just keep then room temp if im gonna be running a coil right before the top of the biomass column?

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Safety first!

Yes just store them at room temp. If for any reason you had a leak in one of those tanks in your freezer it could be catastrophic.

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Will do brother :pray: thank you for the help! I really appreciate all you guys!

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is your main tank chilled too? or only wrapped in insulation? This is genius. i got your mason jar centrifuge filters and they work way better than i expected actually

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:joy:. I’m convinced. Just ordered one from ebay $30 bucks :relaxed:

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How many pounds a minute would you guys say it is if you have a solid steady half inch line garden hose-like stream falling into your solvent tank during recovery? 1lb/min?

With isobutane I am getting over 1lb a minute. Probably closer to 2.

This is even without a proper water heater set up lol

Add a proper water heater and make some adjustments to my collection and the sky’s the limit imo

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The limiting factor either way passive or active is evaporation surface area that’s my biggest bottle neck
Wich someone would make ufo (tamisium ) tanks 4’ diameter

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@Hansel do you have dual half inch hoses? How big is your solvent tank? I have dual 1/4inch hoses recovery takes me forever compared to your times in my 15lb solvent tank, im switching to dual 3/8 should speed up i want to add a half inch line though forsure.

How do you go about clearing the hose from atmosphere when hooking up for recovery? Pulling a vac on the line? how when working with one hose from solvent/recovery tank to collection tank?

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