Patent ID: 6079974
Filing Date: 2000-06-27
Classification: F23C,F23G,F26B

Abstract:
A combustion chamber adapted to receive and process secondary gases, the chamber comprising:a body having a first end and a second end, said body having an inner surface defining an inner combustion area, said body defining a first secondary gas introduction port disposed proximate said first end, an outlet port disposed proximate said second end for conveying heated gases from the combustion area, a secondary vent gas port disposed between said first secondary gas introduction port and said outlet port, and a second secondary gas introduction port disposed between said secondary vent gas port and said outlet, and;a burner disposed adjacent said first end of said body so that the flame of said burner when lit will extend into said combustion area;a first annular insert disposed in said combustion area proximate said first end and generally surrounding the flame of said burner when lit, said first insert defining a first secondary gas introduction zone in fluid communication with the first secondary gas introduction port for introducing secondary gases into said combustion area so that the secondary gases can be oxidized by the burner flame, said first insert having an annular inner surface having at least one opening for allowing fluid communication between said first secondary gas introduction zone and said combustion area;a second annular insert disposed in said combustion area between said first insert and said outlet port, said second insert defining a secondary vent gas zone that is in fluid communication with the secondary vent gas port, said second insert further defining a second secondary gas introduction zone located between said vent gas zone and said outlet, said secondary gas introduction zone being in fluid communication with said secondary gas introduction port, said second insert having a divider plate separating the vent gas zone and the second secondary gas introduction zone, said second insert further having an annular inner wall separating said vent gas zone and said second secondary gas introduction zone from said combustion area, said inner wall of said second insert having a plurality of first openings spaced around said inner wall allowing fluid communication between said combustion area and said vent gas zone, and at least one second opening allowing fluid communication between said second secondary gas introduction zone and said combustion area; anda plurality of adjustable ports, said adjustable ports being disposed through said first openings,wherein secondary gases may be introduced into said combustion chamber for oxidation through said first annular insert, a portion of the secondary gases introduced through said first insert being removed from said chamber after oxidation through said vent gas zone and said first openings in said inner wall, another portion of the secondary gases may be introduced through said second secondary gas introduction port and the second secondary gas introduction zone, said secondary gases not removed by said vent gas zone and said gases introduced through said second secondary gas introduction zone exiting the combustion chamber through the outlet port.