Did a run today and my passive recovery times were terrible!
My recovery tank is the same as the supply tank and I’m wondering if not pulling a vacuum on it is the reason it’s been so slow. I’m talking like 3.5 hours at this point for 10lb.
Here’s my procedure just for reference:
System other than recovery tank, as mentioned prior, under vac (all lines)
~2LB bidirectional column (didn’t run dewaxing column today)
10 lb solvent
Spool buried in dry ice
Supply tank on scale, disconnected when gas stopped flowing
Removed column. Still had a lot more gas than I’d like to be wasting, but it was no longer flowing into the spool.
Removed spool from dry ice
Placed supply (now recovery) tank into dry ice right side up with recovery line connected to the vapor port
Placed collection spool into 90-100*F water which I cycle out (have a jacketed platter I’m going to try using next)
Still waiting on recovery… 3.5 hours later.
Would speeds be considerably improved by having a recovery vessel under vacuum? My only concern here is operating a standard vac pump with a vessel containing trace amounts of 70/30 butane propane.
Trying to make passive work on this new system guys, I need your help though!
Thanks in advance, this is the best community around.