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.

A fuel injector for a gas turbine engine includes a monolithic nozzle body that defines within its interior one or more fuel circuits. Each fuel circuit includes an inlet, an outlet orifice, a main passage fluidly coupling the inlet with the outlet orifice, and a branch passage connected to the main passage. The branch passage connects to the main passage downstream of the inlet and upstream of the outlet orifice to form an effective metering flow area that is smaller than the flow area of the outlet orifice.

A premixing apparatus includes a mixing unit, an air supply adjusting unit, and a gas switching unit. The mixing unit draws a fuel gas in the mixing unit by supplied air to mix the fuel gas and the supplied air with each other. The air supply adjusting unit applies a load on the supplied air flowing toward the mixing unit and switches the load. The gas switching unit switches a gas amount of the fuel gas to be supplied to the mixing unit.

A burner gas supply apparatus for increasing flame turbulence, the apparatus comprising a conduit having a characteristic width, W, defined by an inner surface having a circumferential direction and an axial direction, the axial direction terminating in a nozzle defining a nozzle exit plane and having a characteristic dimension, d, where d<=W; and three bluff bodies each with a characteristic dimension, D.sub.bb-i, projecting a length, L.sub.i into the conduit from the inner surface, and an axial spacing X.sub.i between adjacent bluff bodies (between the downstream bluff body and the nozzle exit plane in the case of X.sub.1) wherein 0.5<=L.sub.i/W<=1 and wherein X.sub.i/D.sub.bb-i<=30.

A nozzle for a combustor burning a hydrogen-containing fuel is provided. The nozzle includes a first tube through which the fuel flows and having a fuel injection hole on a front side to inject the fuel therethrough, a second tube surrounding the first tube and having a premixing injection hole through which the fuel and air are mixed and discharged, and a third tube surrounding the second tube and through which the fuel flows, wherein the second tube includes a plurality of fine injection holes to inject the fuel from the third tube to form fine flames, and the fine injection holes are spaced apart from each other in a circumferential direction of the second tube.

A system and method of igniting a coal air-fuel mixture, including a burner having a burner tube operable to carry a flowing mixture of fuel and air to a furnace for combustion therein and a first flow directing device disposed within the tube, operable to direct a first portion of the flowing fuel and air mixture to a location in the burner tube. The system also includes a laser igniter within the burner tube, the laser igniter including a laser tube having a first end with a laser light input and a second end with a light output, and a laser light source operably coupled to the laser light input. The laser light source, including a laser. The laser ignitor directing photons from the light output at the location in the burner tube to ignite at least a part of the first portion of the fuel.

Systems and methods are disclosed that include providing a cooking system that comprises a burner assembly and a heat exchanger, the burner assembly having a high velocity burner configured to provide the necessary high velocity, volumetric flowrate through the heat exchanger having a first fluid circuit having a plurality of compactly-arranged tubes disposed perpendicularly and interstitially to a second fluid circuit having a plurality of compactly-arranged tubes, and the burner assembly also having a low velocity burner configured to significantly reduce and/or substantially eliminate “lift off” that could result from operation of only the high velocity burner.

A multi-autoclave lateral conversion module includes a central mixing process pipe having first and second terminal ends, a heating unit providing heated air at the first terminal end of the central mixing process pipe, two or more gas injection units connected to opposing sides of the central mixing process pipe at a first addition point located between the first and the second terminal ends, and each gas injection unit receiving the process discharge gas from an autoclave unit. The process discharge gas is transmitted from an autoclave unit through the gas injection unit into the central mixing process pipe where it mixes with the process discharge gas from the other autoclave unit, and then the mixed process gases are converted. Process units other than autoclaves can also utilize the module and method provided.

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.

Post-mix burner and use of same for generating a flame curtain, the burner having a longitudinal central dividing wall (5) terminating in a wall head (7) towards the burner top (4), an oxidant inlet compartment (102) and an oxidant outlet compartment (103) on a first side of the central wall (5), a fuel inlet compartment (202) and a fuel outlet compartment on the opposite side of the central wall (5); the wall head (7) presenting a first set of oxidant outlet passages (107) and a second set of fuel outlet passages (207) terminating respectively in first oxidant ejection openings (100) and second fuel ejection openings (200) in an ejection surface (10) at the burner top (4), the oxidant and fuel ejection openings (100, 200) each extending in the longitudinal direction along the ejection surface (10).