Patent ID: 6923851
Filing Date: 2005-08-02
Classification: B01D

Abstract:
1. A filtration system for removing air borne asphalt oil droplets from the air comprising, a housing, an inlet unit mounted adjacent the bottom end of said housing for receiving dirty air which carries air-borne asphalt oil droplets, a fresh air gate mounted in said inlet unit to selectively admit ambient fresh air which mingles with the dirty air, a dirty air plenum mounted to said inlet unit adjacent the bottom end of said housing to receive air from said inlet unit, an air moving unit mounted adjacent to said housing for drawing air through said housing in an upward direction from said dirty air plenum, a plurality of filter stages stacked vertically within said housing above said dirty air plenum whereby air from said dirty air plenum passes vertically upward through each of said filter stages and produces filtered air, an outlet for venting filtered air from said housing, and a drain for removing oil from said dirty air plenum which oil has been removed from the air by said filter stages.