Freezing in Water Vessel During Cold Gas Blow By

[ChemEngSquirrel]

I have a water vessel and a gas blow by relief case.

I have a cold gas blow by relief stream at -20oC. To reach the PSV the relief stream must pass through stagnant water in the vessel (1 m id x 2 m height). The water is initially at 20oC. The relief load of cold gas is around 15,000 kg/h.

Should i be worried about the cold gas causing the stagnant water in the vessel to freeze and restricting relief?

Thanks.

 

[Chance17]

I view gas blow by as both gas and liquid exiting the bottom of vessel.
If the liquid is moving or turbulent, I don't see how it can freeze

 

[Duwe6]

It is concievable to me that a bunch of kernel-sized ice chunks could be generated and be blown into the PRV. If it was mine, I would add a 2"(+) rupture disk to the system and set it 10% higher than the PRV. Not really possible to jam up a R/D, but PRV's get fouled and stopped up all the time.

 

[MortenA]

I agree with Chance17 (and disagree with Duwe6): Ice wont be formed and carried up to the PSV unless the relief case goes on for so long that all the water reaches 0 deg C (and the water is fresh) . But i also agree that it sems like a 2P relief case.