KappaGi
ONE STAGE AD + AB TWO STAGES COND + AD

ONE STAGE UNIT ADSORPTION + ABSORPTION

• Activated carbons regenerated by vacuum + absorbent washing.

The Vapor Recovery Unit is composed by two activated carbon beds: one in operation, while the second is regenerated by vacuum; vapors of HC are adsorbed by activated carbons and air, free of hydrocarbons, is discharged to atmosphere.

The desorbed hydrocarbons are sent to a contact column where they are washed by an absorbent stream (generally the same product that has generated the vapors); absorbent settles down in a tank from where is pumped back to customer’s tanks.

 

 

The cycle of each carbon bed:
"HC recovery - bed switching - regeneration under vacuum - air purge - pressurization - bed switching - recovery"
is represented above.