Flare system

[BZLAM21]

Hi
If possible,can someone explain what is the best choice between molecular seal or velocity seal for flare system in a refinery and what is the difference between them (advantages and disadvantages)?
best regards.

 

[georgeverghese]

I've only worked with molecular seals on flares. Personally, not fond of them, they could get blocked. Best to use higher purge rates instead and use inert gas if you have enough.

 

[shvet]

what is the best choice between molecular seal or velocity seal for flare system?

User dependent. Depends on application, cost of purge and local practices.

what is the difference between them (advantages and disadvantages)?

Mol seal - more pressure drop, less reliable, less purge rate for flashback prevention
Vel seal - vice versa