This invention relates in general to a pellet-fired smoker which includes a housing having a smoke chamber defined within it. A hopper holding pellet fuel supplies pellets through one or more augers to one or more fire pots configured to enhance smoking a food product by increasing the smoke flowing to a food product at various cooking temperatures.

A combustion/pyrolization system for generating at least one of char and biochar comprising an upper base frame supporting a combustion/pyrolization housing, and the combustion/pyrolization housing having both an open top end and an open bottom end. A char collection bin defining a collection chamber therein and a perforated grate normally covering the open top end of the char collection bin. The perforated grate being sized so as to permit desired sized char and/or biochar to pass therethrough into the collection chamber. The open bottom end of the combustion/pyrolization housing of the upper base frame is movable into an engaged position where the combustion/pyrolization housing partially receives and surrounds the perforated grate and defines a combustion/pyrolization chamber for receiving and consuming feed material. The upper base frame is movable out of engagement with the perforated grate to facilitate movement of the perforated grate and removal of the generated char and/or biochar.

A combustion/pyrolization system for generating at least one of char and biochar comprising an upper base frame supporting a combustion/pyrolization housing, and the combustion/pyrolization housing having both an open top end and an open bottom end. A char collection bin defining a collection chamber therein and a perforated grate normally covering the open top end of the char collection bin. The perforated grate being sized so as to permit desired sized char and/or biochar to pass therethrough into the collection chamber. The open bottom end of the combustion/pyrolization housing of the upper base frame is movable into an engaged position where the combustion/pyrolization housing partially receives and surrounds the perforated grate and defines a combustion/pyrolization chamber for receiving and consuming feed material. The upper base frame is movable out of engagement with the perforated grate to facilitate movement of the perforated grate and removal of the generated char and/or biochar.

The present invention discloses a cooker burner. The cooker burner comprises a base (1), a first ejector passage (3), a plurality of primary air passages (4), a cap (5) and a transfer passage (6), the base (1) has a chamber (11) and at least one first ejector (12); the first ejector passage (3) has a central chamber (311) and a peripheral chamber (312), the peripheral chamber (312) is used for making primary air around the periphery of the central chamber (311) uniform. With the design of the first ejector passage, the gas in the central chamber is more directly mix with the primary air in the peripheral chamber, improving the mixing uniformity and air intake rate around the periphery of the central chamber. Therefore, yellow flame and backfire can be avoided.

The present invention discloses a cooker burner. The cooker burner comprises a base (1), a first ejector passage (3), a plurality of primary air passages (4), a cap (5) and a transfer passage (6), the base (1) has a chamber (11) and at least one first ejector (12); the first ejector passage (3) has a central chamber (311) and a peripheral chamber (312), the peripheral chamber (312) is used for making primary air around the periphery of the central chamber (311) uniform. With the design of the first ejector passage, the gas in the central chamber is more directly mix with the primary air in the peripheral chamber, improving the mixing uniformity and air intake rate around the periphery of the central chamber. Therefore, yellow flame and backfire can be avoided.

A burner including a first burner element having a first annular oxidant nozzle surrounding a first inner fuel nozzle; a second burner element having a second annular oxidant nozzle surrounding a second inner fuel nozzle, the second burner element being positioned adjacent to and spaced apart from the first burner element; a staging nozzle configured to flow secondary oxidant and being positioned adjacent to and spaced apart from the second burner element and separated from the first burner element by the second burner element; wherein the first inner nozzle and the second inner nozzle each have a major axis defined by a length L and a minor axis defined by a height h.sub.f; wherein 5<=L/h.sub.f<=15; wherein the staging nozzle has a major axis; and wherein the major axes of the first and second inner nozzles and the staging nozzle are substantially parallel with each other.

A burner including a first burner element having a first annular oxidant nozzle surrounding a first inner fuel nozzle; a second burner element having a second annular oxidant nozzle surrounding a second inner fuel nozzle, the second burner element being positioned adjacent to and spaced apart from the first burner element; a staging nozzle configured to flow secondary oxidant and being positioned adjacent to and spaced apart from the second burner element and separated from the first burner element by the second burner element; wherein the first inner nozzle and the second inner nozzle each have a major axis defined by a length L and a minor axis defined by a height h.sub.f; wherein 5<=L/h.sub.f<=15; wherein the staging nozzle has a major axis; and wherein the major axes of the first and second inner nozzles and the staging nozzle are substantially parallel with each other.

A furnace including a housing and a firebox in the housing having a combustion chamber. The furnace includes a combustion air delivery system for delivering combustion air to the combustion chamber. The combustion air delivery system includes a manifold mounted outside the combustion chamber and extending vertically along the front face of the combustion chamber from a lower end to an upper end. An air blower is mounted on the manifold. The combustion air delivery system includes a primary combustion air passage for delivering air from the air blower to a primary combustion air outlet at the front face of the combustion chamber. The combustion air delivery system includes a secondary combustion air passage for delivering air to a secondary combustion air outlet positioned inside the combustion chamber adjacent the top face of the combustion chamber.

A furnace including a housing and a firebox in the housing having a combustion chamber. The furnace includes a combustion air delivery system for delivering combustion air to the combustion chamber. The combustion air delivery system includes a manifold mounted outside the combustion chamber and extending vertically along the front face of the combustion chamber from a lower end to an upper end. An air blower is mounted on the manifold. The combustion air delivery system includes a primary combustion air passage for delivering air from the air blower to a primary combustion air outlet at the front face of the combustion chamber. The combustion air delivery system includes a secondary combustion air passage for delivering air to a secondary combustion air outlet positioned inside the combustion chamber adjacent the top face of the combustion chamber.

A furnace including a combustion chamber for burning fuel can have increased fuel burning efficiency, increased heating efficiency, and decreased harmful emissions of combustion byproducts. A combustion air delivery system delivers primary and secondary combustion air to the combustion chamber. Primary and secondary combustion air may be delivered at amounts that increase burning efficiency. An amount of secondary combustion air can be controlled by a valve system. A heat transfer device efficiently transfers heat from products of combustion for heating an enclosed space.