Hot Oil Expansion Tank: N2 Blanketing
Hot Oil Expansion Tank: N2 Blanketing
(OP)
Hi all, I was hoping someone could explain a little more clearly what the use of a "Cold Seal Trap" is in then following paracgraph (from Therminol's manual):
Figure A:
Figure B:
From Therminol "Liquid phase systems design guide"
Any other hints or tips in this area would be appreciated! Thanks!
Quote:
An effective way of minimizing fluid oxidation is to blanket the system with an inert gas (e.g. nitrogen) as shown in figure A. When using a nitrogen blanket, moisture should be driven off from the fluid before the gas pressure is set. If this is not practical, air contact can be minimized by a cold seal trap arrangement as shown in figure B. Low boilers and moisture can collect in the cold seal trap, so the fluid in the trap should be discarded periodically.
Figure A:
Figure B:
From Therminol "Liquid phase systems design guide"
Any other hints or tips in this area would be appreciated! Thanks!
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RE: Hot Oil Expansion Tank: N2 Blanketing
The most important part of the cold seal trap is that the vent from the expansion tank ends below the liquid level in the trap.
I have used the nitrogen purge option but not the cold seal trap. But nitrogen is readily available at my facility.
Regards
StoneCold
RE: Hot Oil Expansion Tank: N2 Blanketing
Read the Eng-Tips Site Policies at FAQ731-376
RE: Hot Oil Expansion Tank: N2 Blanketing
If you don't have nitrogen to purge the system then the best you can do is go with a high liquid level in the expansion tank at startup and drive the water off simply by vapor displacement through the vent line.
Does that clear it up a little?
Regards
StoneCold
RE: Hot Oil Expansion Tank: N2 Blanketing
Any other tips about these systems?
Read the Eng-Tips Site Policies at FAQ731-376