The premixing device includes a first and a second venturis having a pressure reducing portion for air, and a gas supply passage for supplying fuel gas to the venturis, and generates air-fuel mixture by mixing fuel gas with air flowing in the venturis by using a fan and supplies the air-fuel mixture to a burner. A first and a second nozzles for reducing pressure of fuel gas are disposed in the gas supply passage, and the first and the second nozzles are formed in the same nozzle shape as the pressure reducing portion of the first and the second venturis.

A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

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.

A dual fuel burner system includes a fuel burner housing and a main fuel supply conduit within the fuel burner housing. A main fuel nozzle is positioned proximate to a downstream end of the fuel burner housing and is in fluid communication with the main fuel supply conduit. The main fuel supply conduit is configured to provide 100% of the heat input requirement of the dual fuel burner system. A secondary fuel supply conduit is within the fuel burner housing. The secondary fuel supply conduit is configured to provide 100% of the heat input requirement of the dual fuel burner system. An air circuit is in fluid communication with an outlet of the main fuel nozzle. A direct spark ignitor is positioned proximate to the outlet of the main fuel nozzle.

An interchangeable enclosed combustor for combustion of vapors includes: an interchangeable multi-paneled, multi-tiered combustor housing having a plurality of panels coupled together in polygonal form and further arranged in multiple tiers of polygonal forms, thereby to form a vertical, columnar, polygonal stack to flame combust combustible vapors; and a burner manifold disposed within the vertical, columnar, polygonal stack to flame combust combustible vapors to reduce toxic emissions. The burner manifold natural draft burners and nozzles are configured to the ratio of air and fuel to mix to achieve stoichiometric combustion and reduce harmful emissions at a rate >98% destruction efficiency and inlet pressure of <1 oz./in2. The burner manifold includes at least one orifice of a predetermined size through which to draw fuel into a plurality of mixing chambers where air is drawn in through multiple stages of air intake ports that are sized based upon fuel type and pressure.

An outdoor invisible-ignition burner comprises a furnace which is circumferentially enclosed, wherein a porous ceramic plate is disposed at the top of the furnace and is fixedly mounted at an opening in the top of the furnace through a decoration ring, an ignition needle connected with a high-tension ignition wire is fixed on an outer wall of the furnace, a jet tube is disposed in the furnace, one end of the jet tube stretches out of the furnace and is connected with a main gas tube through a main nozzle, an auxiliary nozzle is mounted at the bottom of the furnace and stretches into the furnace, a gas outlet end of the auxiliary nozzle is located below the ignition needle, and a gas inlet end of the auxiliary nozzle is connected with a side wall of the main nozzle through an auxiliary gas tube.

The present disclosure is directed to a dual-fuel fuel nozzle that includes a center body having a tube shape and a gas fuel plenum defined within the center body. The duel-fuel fuel nozzle also includes a ring manifold defining a liquid fuel plenum disposed within the center body. The duel-fuel fuel nozzle further includes a plurality of radially oriented fuel injectors in fluid communication with the liquid fuel plenum. Additionally, the duel-fuel fuel nozzle includes an inner fuel tube extending axially within the center body. A portion of the inner fuel tube extends helically about an axial centerline of the center body. The inner fuel tube is in fluid communication with an axially oriented fuel injector. Furthermore, the duel-fuel fuel nozzle includes first fuel tube extending helically around a portion of the inner fuel tube within the center body. The first fuel tube is fluidly coupled to the fuel plenum.

The present disclosure is directed to a dual-fuel fuel nozzle including a center body having a tube shape and a gas fuel plenum defined within the center body. The fuel nozzle also includes a plurality of turning vanes extending radially outward from the center body. Each turning vane includes at least one fuel port in fluid communication with the gas fuel plenum. A plurality of apertures is disposed through the plurality of turning vanes. The fuel nozzle further includes a ring manifold disposed within the center body downstream of the plurality of turning vanes. Additionally, the fuel nozzle includes a first fuel tube extending helically around a centerline of the center body. Furthermore, the fuel nozzle includes an air shield disposed within the center body and extending circumferentially around the first fuel tube.

A gas burner includes: a nozzle where gas fuel flows; and a primary air supply part for supplying, from around the nozzle, primary air whose air ratio to the gas fuel is less than 1. The nozzle includes: at least one main hole configured to eject the gas fuel at an ejection angle of not less than 25 degrees and not greater than 45 degrees with respect to a central axis of the gas burner; and at least one sub hole configured to eject the gas fuel at an ejection angle of not less than 35 degrees and not greater than 55 degrees with respect to the central axis of the gas burner, the ejection angle of the sub hole being greater than the ejection angle of the main hole. The gas fuel flowing in the nozzle has a gas pressure of not less than 300 kPa.

A modular burner system includes a nipple elongated along an axis and a plurality of jets connected to the nipple. The jets are spaced from each other along the axis. Each jet connected to the nipple has a jet axis and is elongated from the nipple along the jet axis. Each jet connected to the nipple has an exit on the jet axis spaced from the nipple to release fuel to fuel a flame at the exit. The jet axis of at least one of the jets connected to the nipple is at a first angle relative to the axis and the jet axis of at least one of the jets connected to the nipple is at a second angle relative to the axis different than the first angle.