thank you @Graywolf !
(posted reply in wrong thread. 
)
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Thats a fact 
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Has anyone had any luck chilling down their system using a plate heat exchanger with LN2 in a similar fashion to a counterflow coil?? I was thinking inject the LN2 in and run methyl hydrate thru it?? (I am currently using methyl hydrate in the jackets of my CLS.)
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Methanol freezes at liq N2 tempsā¦which I have always assumed would be a disadvantage in a flare plate HX
Wouldnāt you just use less nitrogen to keep the temps a little higher?
Yes, you can throttle the liquid flow so it doesnāt cool as much.
what are ppl running thru their counterflow coils with LN2?
Is there a way to tell when to stop throttling?
I use a swagelock needle valve on mine. I use it to cool the jacket of my solvent tank, instead of using dry ice. I use less than the cost of dry ice. Itās for butane and not on a plate heatX, but the concept works the same. I could outfit a thermoprobe in there and monitor the temps and regulate flow that way.
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Thatās similar to what I want to do. But I want to chill my material columns as well. Also running butane. Is it cheaper because of cost or because of how much you use?? Iām using 100# of dry ice a day @ $2/lb so Iām hoping to cut that cost a bit.
How do you pump your LN2? Prax air here claims to buy Ln2 you have to get a dewar i think it was and it just pours out???
I use a dewar, yes and it has a hose that is fed to whatever you are cooling. Just get an adapter for the hose to attach to your equipment . I get a 220L with delivery, fees, tax and the works for around 130-150 ish. I use a couple or few a week and itās still cheaper than a couple totes of dry ice. If I had a micro bulk it would be cheaper. It would work for your material column, but I would find a way to get a temperature reading. Ln2 will get colder than we are wanting.
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Where would be the best placement for a sensor?? Are there sensors designed for the industry?
There are a few ways to get the temperature reading. I have a data logger on my equipment that came with the bizzybee. I canāt remember where to find it. Once I get to the shop Iāll look it up and post it.
Thereās some companies that have temp guages that you can use in line like a pressure Guage, too. I canāt remember who has em right now, but Iāve seen them.
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@Schocke88
Would be super Interested in the pressure gauge you recommend. Currently using way more ice than I would like to admit. Just starting to fiddle with LN to drop some of that cost. Figured I would start with solvent tanks and go from there.
Assuming youāre actually interested in the THERMOMETER
Start here: Recovery Speed problems - #25 by BizzybeeTeam