Patent ID: 6468466
Filing Date: 2002-10-22
Classification: F27B,F27D

Abstract:
An exhaust remediation system for combusting unburned combustible pollutants entrained in relatively low temperature exhaust streams, comprising:a generally cylindrical combustion chamber including an insulated cylindrical shell defining an open inlet orifice and an open outlet orifice; said cylindrical combustion chamber defining an interior volume therein; a fuel burner assembly, comprising a fuel nozzle, a control device for controlling supply of combustible fuel, means for igniting said fuel, and a blower for forcing a stream of ambient air around fuel issuing from said nozzle, so as to create a relatively high-temperature flame; said fuel burner assembly being mounted to said combustion chamber, spaced from said open inlet orifice and aligned such that said high-temperature flame is directed substantially tangentially into said combustion chamber through said cylindrical shell and between said inlet orifice and said outlet orifice, not at the cylindrical axis thereof; and means for controlling the rate at which one of both of ambient air and said exhaust stream flow into the inlet orifice of said combustion chamber; said means for controlling the rate being connected to said inlet orifice; whereby the combination of said high-temperature flame and said exhaust stream traverses a generally spiral flow path within said cylindrical combustion chamber with said spiral flow path filling substantially said entire interior volume of said cylindrical combustion chamber; and wherein said unburned combustible pollutants experience a maximum average residence time in a portion of said combustion chamber that is heated by combustion of said fuel in said fuel burner assembly to a temperature sufficient to substantially combust said unburned combustible pollutants.