Afterburner

Claim 2

The apparatus of claim 1, wherein said burner means includes means for introducing fuel to said burner means, blower means for introducing air to said burner means, and ignition means for igniting the fuel and air mixture.

Claim 3

The apparatus of claim 3, wherein said means for introducing fuel includes a conduit and valve means located in the conduit, said apparatus also including temperature responsive means responsive to the temperature within the casing and operably connected to said valve means to thereby control the flow of fuel to the burner means in accordance with temperature conditions in said casing.

Claim 4

The apparatus of claim 4, wherein said valve means is provided with a high-flow position and a low-flow position and said temperature responsive means operates to move said valve means between said high-flow and low-flow positions.

Claim 5

The apparatus of claim 1, and including second stack means spaced radially outward of the first stack means to provide an air passage therebetween, the upper end of the second stack means terminating a substantial distance above the upper end of the first stack means, and means for introduciNg air into the lower end of said passage whereby said air moves upwardly through said passage and is heated and merges with the gases at the upper end of the first stack means.

Claim 6

The structure of claim 6, wherein said second stack means is located on the outside of the casing and the lower end of the second stack means is spaced upwardly of the top wall of said casing.

Claim 7

A combustion device for burning combustible products in a gas, comprising a closed casing including a side wall, a top wall, and a bottom wall, an inner tubular member spaced inwardly of the outer wall of the casing to define an outer chamber therebetween and the interior of said tubular member defining an inner chamber, the lower end of said tubular member being sealed to said lower wall of the casing and the upper end of the tubular member being spaced from the upper wall of the casing to provide a passage that establishes communication between the outer and inner chambers, a first vertical stack located within the inner chamber and extending to the exterior of the casing, gas inlet means located at the lower end of the outer chamber and disposed generally tangentially of said outer chamber whereby gas containing combustible products is introduced tangentially into said chamber and moves upwardly within the outer chamber in a generally spiral path, and through said passage and downwardly within the inner chamber in a spiral path to the stack, a burner unit located in the lower end of the outer chamber adjacent the gas inlet means, means for introducing fuel to said burner unit, means for supplying air under pressure to said burner unit, ignition means for igniting the fuel and air mixture in said burner unit, and a second stack spaced outwardly from the first stack to provide an annular air passage therebetween, said stack being located on the exterior of the casing and the upper end of the second stack terminating a substantial distance above the upper end of the first stack, air being drawn through the lower end of the passage and merging with the gas discharged from the upper end of the first stack to thereby provide complete combustion for the combustible products in said gas.

Claim 8

The apparatus of claim 8, wherein said passage comprises an upper chamber located at the upper end of the casing, said inner chamber having a larger volume than said upper chamber and said upper chamber having a larger volume than said outer chamber.

Claim 9

The apparatus of claim 8, and including second air supply means for supplying air under pressure to said outer chamber and located above said first named air supply means.

Claim 10

The apparatus of claim 8, and including third air supply means for supplying air to said passage.

Claim 11

The apparatus of claim 8, and including outlet means communicating with the lower end of said inner chamber, and adjustable means for introducing air through said outlet means to said inner chamber.

Claim 12

A combustion device for burning combustible products in a gas, comprising a closed casing including a side wall, a top wall, and a bottom wall, an inner tubular member spaced inwardly of the outer wall of the casing to define an outer chamber therebetween and the interior of said tubular member defining an inner chamber, gas inlet means located at one end of said outer chamber and extending generally tangentially of said outer chamber for supplying a gas containing combustible product to the outer chamber, conduit means connecting the opposite end of said outer chamber with a first end of said inner chamber, said gas traveling in a swirling path through said outer chamber and through said conduit means to said inner chamber, burner means located adjacent said gas inlet means for burning said combustible products in the gas, stack means located within the inner chamber and extending to the exterior of the casing for discharging the gases from the inner chamber, said stack means including an inner stack communicating with the inner chamber and an outer stack disposed on the exterior of the Casing and spaced radially outward of said inner stack to provide an air passage therebetween, the upper end of said outer stack terminating a substantial distance above the upper end of said inner stack, whereby air is drawn into the lower end of said air passage and travels upwardly through said passage and merges with the gases at the upper end of the inner stack to provide a secondary combustion zone.

Claim 13

The apparatus of claim 3, and including check valve means located between said blower means and the outer chamber for permitting flow of gas in a direction from the blower means to said outer chamber and for preventing flow of gas in the opposite direction.