The present inventions provide, among other things, tapered burner tubes having raised gas ports and a smooth interior surface free from obstructions. Venturi members and air shutters may also be included.

The present invention discloses a burner cap. The burner cap comprises a main body (1) with an annular wall (10), a plurality of first main fire holes (11) is defined on the upper layer, and a plurality of second main fire holes (12) is defined on the lower layer; the annular wall (10) has an annular groove (2), and the annular wall (10) also has a fire holding channel (21), which connects to the annular groove (2) and connects to the first main fire holes (11), and/or the second main fire holes (12). So that the burner cap can significantly improve the combustion efficiency of the gas range while holding the flame from the first and second main fire holes.

According to an embodiment, a burner system includes a pilot burner disposed in a furnace at a distal position along a main fuel and combustion air flow axis, and one or more main fuel nozzles disposed at a proximal position along the main fuel and combustion air flow axis. The pilot burner is configured to support a pilot flame and the one or more main fuel nozzles are configured to support a main flame in contact with the pilot flame. The pilot burner is disposed to cause the main fuel and combustion air to be ignited by the pilot flame. The pilot burner may support a diffusion pilot flame or may include a premixing apparatus to support a pre-mixed flame.

According to an embodiment, a burner system includes a pilot burner disposed in a furnace at a distal position along a main fuel and combustion air flow axis, and one or more main fuel nozzles disposed at a proximal position along the main fuel and combustion air flow axis. The pilot burner is configured to support a pilot flame and the one or more main fuel nozzles are configured to support a main flame in contact with the pilot flame. The pilot burner is disposed to cause the main fuel and combustion air to be ignited by the pilot flame. The pilot burner may support a diffusion pilot flame or may include a premixing apparatus to support a pre-mixed flame.

Burner Tubes for Gas Grills are disclosed. An example burner tube includes a linear burner tube including a venturi member disposed within a hollow interior of the linear burner tube proximate an open front end of the linear burner tube. The venturi member includes a front face having an opening configured to receive a neck of a gas valve, an upper flange extending rearwardly from an upper edge of the front face, the upper flange having a downwardly-extending V-shaped segment configured to constrict a region of the hollow interior, and a lower flange extending rearwardly from a lower edge of the front face, the lower flange having an upwardly-extending V-shaped segment configured to further constrict the region of the hollow interior.

Burner Tubes for Gas Grills are disclosed. An example burner tube includes a linear burner tube including a venturi member disposed within a hollow interior of the linear burner tube proximate an open front end of the linear burner tube. The venturi member includes a front face having an opening configured to receive a neck of a gas valve, an upper flange extending rearwardly from an upper edge of the front face, the upper flange having a downwardly-extending V-shaped segment configured to constrict a region of the hollow interior, and a lower flange extending rearwardly from a lower edge of the front face, the lower flange having an upwardly-extending V-shaped segment configured to further constrict the region of the hollow interior.

To further reduce the NOx emission, the invention provides a mixing device (10) for a burner (16) having reduced NOx production, comprising a centrally arranged first mixing unit (18) for producing a first fuel-air mixture for a primary flame zone (120), wherein the first mixing unit (18) has at least one first fuel nozzle (38) and a baffle plate (40), a second mixing unit (20) for producing a second fuel-air mixture for a secondary flame zone (122), which encloses the primary flame zone (120), wherein the second mixing unit (20) has multiple second fuel nozzles (70), characterized by a sealing air producing unit (24) for producing a sealing air flow in a sealing air zone, which encloses the primary flame zone (120) of the first mixing unit (18) arranged downstream of the baffle plate (40), wherein the second mixing unit (20) is designed to deliver the second fuel-air mixture into the secondary flame zone (122), which encloses the sealing air zone (126), and wherein the second mixing unit (20) is arranged around the sealing air producing unit (24), and by a third mixing unit (22) which is arranged radially between the sealing air producing unit (24) and the second mixing unit (20) and has a swirl generator (76) and at least one third fuel nozzle (74), which is arranged upstream of the swirl generator (76) in a premixing zone (78), through which a swirled air flow flows to the swirl generator (76), to premix fuel from the third fuel nozzle (74) with the swirled air flow before the swirl generation.

To further reduce the NOx emission, the invention provides a mixing device (10) for a burner (16) having reduced NOx production, comprising a centrally arranged first mixing unit (18) for producing a first fuel-air mixture for a primary flame zone (120), wherein the first mixing unit (18) has at least one first fuel nozzle (38) and a baffle plate (40), a second mixing unit (20) for producing a second fuel-air mixture for a secondary flame zone (122), which encloses the primary flame zone (120), wherein the second mixing unit (20) has multiple second fuel nozzles (70), characterized by a sealing air producing unit (24) for producing a sealing air flow in a sealing air zone, which encloses the primary flame zone (120) of the first mixing unit (18) arranged downstream of the baffle plate (40), wherein the second mixing unit (20) is designed to deliver the second fuel-air mixture into the secondary flame zone (122), which encloses the sealing air zone (126), and wherein the second mixing unit (20) is arranged around the sealing air producing unit (24), and by a third mixing unit (22) which is arranged radially between the sealing air producing unit (24) and the second mixing unit (20) and has a swirl generator (76) and at least one third fuel nozzle (74), which is arranged upstream of the swirl generator (76) in a premixing zone (78), through which a swirled air flow flows to the swirl generator (76), to premix fuel from the third fuel nozzle (74) with the swirled air flow before the swirl generation.

Embodiments of the present disclosure describe burner configurations used in an industrial process to convert methane to olefins, aromatics, and nanoparticles/nanomaterials. Both a vitiated coflow burner and piloted turbulent burner with inhomogeneous inlets are disclosed.

Embodiments of the present disclosure describe burner configurations used in an industrial process to convert methane to olefins, aromatics, and nanoparticles/nanomaterials. Both a vitiated coflow burner and piloted turbulent burner with inhomogeneous inlets are disclosed.