A modulating burner apparatus includes a burner and a blower placed upstream of the burner. A venturi is placed upstream of the blower. A damper valve is placed upstream of the venturi. The damper valve has an open position and a restricted position. A smaller gas valve and a larger gas valve are communicated with the venturi. A controller is operably associated with the system to select a position of the damper valve and to select the appropriate one of the gas valves so as to provide a low output operation mode and a high output operation mode, which in combination provide an overall turndown ratio of at least 25:1.

A method is disclosed for controlling fuel injection in a reheat combustor of a gas turbine combustor assembly including a combustor casing defining a gas flow channel and a plurality of injection nozzles distributed in or around the gas flow channel; the method includes the step of distributing fuel among the injection nozzles according to a non-uniform distribution pattern.

Injection nozzle 7 and electrode rods 8 and 9 (ignitor) are surrounded by double-cylinder flame stabilizer 10. Toroidal blocking plate 13 closes between inner and outer cylinders 11 and 12 of the stabilizer at its distal end whose proximal end is connected with line 15 for introducing combustion air 14 to between the cylinders. Inflow holes 16 are formed throughout the inner cylinder at its proximal end. Peripheral fins 17 are formed peripherally on the inner cylinder radially inwardly through cutting and bending-up at positions shifted from the inflow holes toward the distal end of the inner cylinder such that combustion air is introduced from circumferentially to form swirling flow inside the inner cylinder. End fins 18 are formed on the blocking plate in fuel injection direction through cutting and bending-up such that combustion air is discharged circumferentially to form swirling flow around flame 21.

A system and method for heating process air is disclosed. Low NOx burners are provided with low temperature combustion air, e.g., less than about 0° C., and fuel at varying amounts to maintain a desired balance between low NO.sub.2 and low CO emissions. The amount of combustion air and the amount of fuel may be adjusted to achieve desired low NO.sub.2 and low CO via a feedback control system.

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 heating apparatus for an exhaust train comprises a flow-conducting device for guiding an exhaust gas flow along a flow path; a burner that is arranged outside the flow-conducting device and that is configured to generate heating gases during the combustion of a fuel; and a supply device that is configured to supply the heating gases generated by the burner to the exhaust gas flow, which is guided through the flow-conducting device, via a heating gas inlet that is formed in a wall of the flow-conducting device. The supply device has a channel that is fastened to an outer side of the flow-conducting device in a manner covering the heating gas inlet and open towards it, wherein the channel extends along a peripheral direction running around the flow path and in so doing engages around the flow-conducting device while forming an interruption.

A gas burner includes a burner pipe, in which gas is supplied and which is provided with a row of linearly arranged perforations that allow the gas through to a burner chamber, and an ignition mechanism to ignite the gas electrically. The burner pipe is provided on the inside with a gas distribution pipe in order to evenly distribute the gas supply over the entire row of perforations, and the burner chamber is surrounded by a premounted air chamber, which is connected to the burner chamber by means of air slots, whereby the air slots are oblique with respect to the longitudinal axis of the burner pipe at an angle between 10 and 80, and whereby the air supply through the air slots is controlled by a device that blows in or draws in air through the premounted air chamber.

A smoke removal device, which can burn the particulates in the smoke efficiently, includes a tube body and a combustion unit. The combustion unit is provided in the tube body and includes a main body, a gas pipeline, and a lighter. The main body is located at a first end of the tube body. A smoke passage is formed between a periphery of the main body and an inner wall of the tube body, and the smoke enters the smoke removal device through the smoke passage. The main body has a central passage therethrough, where a fuel gas is ignited. The fuel gas is guided to the central passage through the gas pipeline and then ignited by the lighter to burn the smoke particulates passing through the smoke passage.

A smoke removal device, which can burn the particulates in the smoke efficiently, includes a tube body and a combustion unit. The combustion unit is provided in the tube body and includes a main body, a gas pipeline, and a lighter. The main body is located at a first end of the tube body. A smoke passage is formed between a periphery of the main body and an inner wall of the tube body, and the smoke enters the smoke removal device through the smoke passage. The main body has a central passage therethrough, where a fuel gas is ignited. The fuel gas is guided to the central passage through the gas pipeline and then ignited by the lighter to burn the smoke particulates passing through the smoke passage.

A burner module in an air stream has a feed pipe of substantially circular cross section and an axis, fuel injection orifices situated on the pipe and intended to produce a flame, oxidant injection orifices and fins arranged symmetrically with respect to a plane P of flow of the fuel upstream of the burner module and laterally on the pipe on each side of the fuel injection orifices. There are at least two fuel injection orifices in a section of the pipe and they have an axis that makes an angle with the plane of flow P of the oxidant. In this way, gas is injected at several orifices situated in at least two divergent planes. These two planes delimit a space to which fuel and to which oxidant are not supplied.