Patent ID: 9080766
Filing Date: 2015-07-14
Classification: B01D,F23B,F23G,F23L

Abstract:
1. An emission control apparatus comprising: a housing comprising an internal wall and an external wall, said internal wall defining an exhaust flow path and having a catalyst-coated media disposed therein; at least one ambient air duct disposed within said housing between said internal wall and said external wall, where each said ambient air duct includes an air inlet in said external wall of said housing and an air outlet in said internal wall of said housing in communication with said catalyst-coated media; insulation disposed within said housing between said internal wall and said external wall; and wherein said at least one ambient air duct and insulation are positioned such that, during operation of said emission control apparatus, ambient air enters through the air inlet, travels upwardly through said ambient air duct on a cool exterior side of said insulation before turning and traveling back down on a hot interior side of said insulation where the ambient air is heated from conduction through said internal wall of said housing before being introduced into said catalyst-coated media.