Process for destroying suspended particles

Abstract

A method for regenerating an activated charcoal filter for a spray paint booth exhaust which includes the following steps: a passing a first gas flow of uncontaminated inlet air through the filter; preheating the first gas flow; combining the preheated first gas flow with additional uncontaminated air to form a preheated second gas flow at a predetermined temperature for achieving substantially complete desorption of the activated charcoal filter; recirculating the preheated second gas flow through the filter for desorbing filtered contaminants into the second gas flow; conveying the second gas flow to a heat contributing heat exchanging point for further preheating; pyrolytically oxidizing the further reheated gas flow, at a preselected elevated temperature, thereby oxidizing substantially all of the suspended particles therein; passing a resulting oxidized flow, at elevated temperature, to the heat exchanging point for cooling the oxidized gas flow and contributing exchanged heat to the second gas flow to achieve upstream further preheating; and discharging the cooled flow, devoid of noxious particles, to the atmosphere.

Dependencies are inferred from the claim text.