A decorative-flame burner includes a manifold elongated along an axis and a plurality of nipples supported by the manifold. A jet us supported by and protrudes outwardly from each nipple. Each nipple is elongated transverse to the axis from a first end of the nipple to a second end of the nipple. Each nipple has threads at the first end of the nipple and the manifold includes threaded holes spaced from each other along the axis and threadedly engaged with the threads on the first ends of the nipples.

This invention relates to a burner 100 including a burner body 110 having a burner chamber with a backing plate 122 and having a burner element received in the burner chamber, the burner element having a plurality of gas nozzles 117 for supplying gas into the burner mounted therein for rotational movement such that the direction of gas exiting the gas nozzle can be adjusted. The burner is characterized by means for rotating the gas nozzles 117 which are provided on the backing plate 121 and by releasable means for retaining each gas nozzle 117 in a plurality of rotational configurations provided outside the burner chamber. The burner allows for tuning of gas flow from outside the burner while it is in use.

Systems and methods for hydroxyl driven combustion include introducing a first gas via at least a first orifice into a processing chamber having a substrate disposed on a substrate support. A second gas is introduced into the processing chamber via a plurality of second orifices. The plurality of first orifices and the plurality of second orifices are oriented in an alternating pattern such that each second orifice of the plurality of second orifices is at least partially surrounded by at least a first orifice of the plurality of first orifices. A radical is produced as a function of the first gas and the second gas while heating the chamber.

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 cylindrical burner apparatus and method which produce low NO.sub.x emissions and low noise levels without being dependent upon a blower, or natural draft, for providing air flow or flue gas recirculation. A flow of combustion air is induced into an initial tube pass of the burner by discharging a gas fuel from a plurality of discharge ports located in the initial tube pass. At the same time, a flow of recycled flue gas is induced through a bypass duct between a subsequent tube pass of the burner and the initial tube pass by discharging one or more jets of gas fuel through the bypass duct.

A decorative-flame burner includes a manifold elongated along an axis and a plurality of nipples supported by the manifold. A jet is supported by and protrudes outwardly from each nipple. Each nipple is elongated transverse to the axis from a first end of the nipple to a second end of the nipple. Each nipple has threads at the first end of the nipple and the manifold includes threaded holes spaced from each other along the axis and threadedly engaged with the threads on the first ends of the nipples.

According to embodiments, burner systems include a first plurality of main fuel nozzles positioned in a flame tube or combustion chamber and configured to supply a flow of main fuel to a burner in the flame tube, and a second plurality of main fuel nozzles positioned outside the flame tube or combustion chamber and configured to introduce a flow of main fuel into a combustion air flow that is introduced to the burner.

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.

Systems and methods are disclosed that include providing a cooking system that comprises a burner assembly and a heat exchanger submerged in a vessel. The burner assembly includes a high velocity burner and a low velocity burner, the high velocity burner configured to provide the necessary high velocity, volumetric flowrate through a fluid duct of the heat exchanger that includes a plurality of compactly-arranged, alternatingly-disposed vertical and horizontal tubes passing through the fluid duct, and the low velocity burner configured to significantly reduce and/or substantially eliminate lift off that could result from operation of only the high velocity burner. The heat exchanger is submerged in the vessel with the tubes of the heat exchanger open to the vessel to allow ingress and egress of a fluid contained within the vessel.

A burner apparatus for a fired heating system and a method of burner operation. The burner provides stable operation when burning gas fuels having heating values ranging from low to high and accommodates sudden wide changes in the Wobbe value of the fuel delivered to the burner. The burner apparatus includes a plurality of exterior fuel ejectors and has an exterior notch which extends around the burner wall for receiving and combusting a portion of the gas fuel. At least a portion of the hot combustion product gas produced in the exterior notch is delivered through channels formed in the burner wall to the combustion area at the forward end of the burner. As the Wobbe value of the gas fuel decreases, one or more outer series of addition ejectors can be automatically activated as needed to maintain the amount of heat output desired.