Method and apparatus for regenerating activated carbon containing an adsorbed volatile organic absorbate

摘要

Activated carbon regeneration is carried out in a downwardly moving bed with superheated steam moving upwardly through the bed. The superheated steam is maintained in a closed loop which comprises the steam treatment vessel, a steam pump and a steam superheater. The superheated steam is supplied at low pressure (e.g. less than about 10 psig) and provides the heat for volatilizing water and desorbed organic volatiles. The resulting dry, partially regenerated activated carbon may be re-used directly, but preferably is treated in a vacuum chamber to remove residual water and additional adsorbate.