Air most versatile heat transfer medium and for the mass transfer of vapors outside the dryer. IR, UV and EB technologies used for certain specialized operations. It is 450 lb per hour. At present, press producing over 100 tons of solvent per year must have pollution control devices. Solvent recovery, fume incineration, or use of water based inks and coatings.
Fans remove the solvent-laden air.
Air channeled through duct work to one or several adsorbers -beds of activated carbon pellets. The pellets adsorb the solvent as the air is forced through them. The cleansed air passes out the adsorber into the atmosphere. After the bed is reasonably saturated with solvent, steam is forced into the absorber solvent vapor is forced out of the carbon and into the steam. The solvent-vapor steam is cooled down and condensed into liquid state.