Recovery time from collection pot changes when lower but PSI remains same

W

WhiteTyrus

Member

• Jan 11, 2018

• #1

So Currently when I flood 3 volume passes through my tubes and into my collection pot I recover lbs on average at 45sec to a minute when it's nearly full and the tank is at 50 psi which is good for me. However when the collection pot is about 20 lbs lower it still is at 50 psi however my recovery time jumps to nearly two minutes and I'm trying to figure out why cause it's currently rattling my brain. Thank You

 

Gray Wolf

A Posse ad Esse. From Possibility to realization.

Mentor

ICMag Donor

Veteran

• Jan 11, 2018

• #2

How are you condensing the vapors?

 

W

WhiteTyrus

Member

• Jan 12, 2018

• #3

Gray Wolf said:

How are you condensing the vapors?

Click to expand...

I'm using a pair of bhogart heat exchangers that each have their own recovery pump hooked up that feeds them, and then a separate coil in ice that's further condenses it into the recovery tank

 

I

Itsgotatail

Member

• Jan 12, 2018

• #4

As the recovery vessel fills there is less surface area on which to condensate vapors. That could be *part* of it.

 

W

WhiteTyrus

Member

• Jan 12, 2018

• #5

Itsgotatail said:

As the recovery vessel fills there is less surface area on which to condensate vapors. That could be *part* of it.

Click to expand...

That's what I was thinking but the PSI stays the same so doesn't that mean it's still gassing off just as fast?

 

HashoftheTitans

Member

• Jan 12, 2018

• #6

WhiteTyrus said:

That's what I was thinking but the PSI stays the same so doesn't that mean it's still gassing off just as fast?

Click to expand...

Fast has nothing to do with the pressure of one vessel. It will only gas off as fast as it can be re-condensed. As you evaporate more solvent from your reactor, you reduce the volume, making heat transfer from the walls more obvious. As you fill your solvent tank, you decrease the surface area for condensation. The higher the temp differential between your recovery side and your evap side, the faster recovery.