Vapor Recovery
basic operation
The basic vapor recovery unit system is comprised of a pressure swing absorption (PSA) process with two activated carbon bed vessels, alternating on a 15 minute time cycle. Regeneration of the carbon reactors is accomplished primarily by vessel evacuation with a vacuum pump to a pressure level of-27 Hg (3 Hg absolute) and secondly, with ambient air purge into the bed in a controlled manner during the last 25% of the regeneration cycle.
The VOCs (volatile organic compounds) desorbed from the carbon during reactor regeneration are effectively recovered in a single step process that is absorption in a packed tower, counter current flow, absorber. Supply tank absorbent is pumped on skid for use as lean oil in the absorber and as a heat exchange fluid for the vacuum pump.
All product recovered by the system is pumped back to the absorbent supply tank mentioned. Here the enriched recovered liquid product is allowed to disperse throughout the supply tank environment.
Jordan Technologies offers both the dry vacuum pump regeneration system as well as the liquid ring regeneration system.
