BenjaminM
Chemical
- Dec 12, 2006
- 86
Hello all! I came across these boards a few weeks ago and have been well impressed by the combine talent and wisdom of everyone here.
First off I am an aspiring young engineer working in NW Georgia. I have been out of school for a little more than a year and a half now and loving it.
Well on too my problem. But first a brief description.
Our process contains methanol as a solvent. As such we do not want to contaminate our system with air (it is nitrogen blanketed) nor do we want to have emissions to the atmosphere.
We have several storage tanks and process vessels that are all connected to one common vent system that goes though a vent condensor to hopefully remove methanol vapors before they are expelled though a vent condensor.
We have managed to "suck in," really more of dent the top of a storage tank.
Though our system is blanketed, we do not have a blanket valve on every tank. This is something I plan on resolving.
What I am trying too examine is the vacuum / pressure that build up in the storage tanks as we pump out of one into another.
For simplistics sake, let me take the example of two 5000 gal storage tanks. We pump from tank A into tank B at some flow rate, just say 100 GPM. The headspace/displaced air/vapor from tank B flows though a 2" vent pipe back into tank A. Assume this is a closed system.
I am aware that I need too take into consideration pressure drops from flame arrestors, valves, lengths of pipeing aswell.
Is there any good standard, guide, rule of thumb for designing / evaluating such a system?
Are there any equations that anyone is aware off of the top of their head that could be used to model such a system?
Thankyou all!!
Benjamin
First off I am an aspiring young engineer working in NW Georgia. I have been out of school for a little more than a year and a half now and loving it.
Well on too my problem. But first a brief description.
Our process contains methanol as a solvent. As such we do not want to contaminate our system with air (it is nitrogen blanketed) nor do we want to have emissions to the atmosphere.
We have several storage tanks and process vessels that are all connected to one common vent system that goes though a vent condensor to hopefully remove methanol vapors before they are expelled though a vent condensor.
We have managed to "suck in," really more of dent the top of a storage tank.
Though our system is blanketed, we do not have a blanket valve on every tank. This is something I plan on resolving.
What I am trying too examine is the vacuum / pressure that build up in the storage tanks as we pump out of one into another.
For simplistics sake, let me take the example of two 5000 gal storage tanks. We pump from tank A into tank B at some flow rate, just say 100 GPM. The headspace/displaced air/vapor from tank B flows though a 2" vent pipe back into tank A. Assume this is a closed system.
I am aware that I need too take into consideration pressure drops from flame arrestors, valves, lengths of pipeing aswell.
Is there any good standard, guide, rule of thumb for designing / evaluating such a system?
Are there any equations that anyone is aware off of the top of their head that could be used to model such a system?
Thankyou all!!
Benjamin
