Submerged combustion burners having a burner body and a burner tip body connected thereto. The burner body has an external conduit and a first internal conduit substantially concentric therewith. The external conduit and first internal conduit form an annulus for passing a cooling fluid there between. A second internal conduit substantially concentric with the external conduit forms a second annulus between the first and second internal conduits. A burner tip body is connected to the burner body at ends of the external and first internal conduits. The burner tip body includes a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip body. The burner tip body further has an outer wall and a crown connecting the inner and outer walls. The crown includes at least one physical convolution sufficient to increase surface area and fatigue resistance of the crown.

A fuel system includes a fuel supply system. A plurality of fuel nozzles are connected in fluid communication with the fuel supply system to supply fuel from a fuel source to be issued for combustion from the fuel nozzles. A cooling system is included, wherein at least one of the fuel nozzles includes a cooling circuit in addition to a fuel circuit for issuing fuel from the fuel supply system for combustion. The cooling circuit includes an inlet and an outlet. The inlet is in fluid communication with the cooling system for circulation of coolant through the cooling circuit and back to the cooling system out the outlet of the cooling circuit for cooling the fuel circuit with the fuel circuit staged off.

A gas burner for use in low-oxygen environments in which the oxygen concentration is insufficient to ensure complete combustion. The burner includes a central air supply that is annularly surrounded by a gas supply, thereby preventing the fuel from burning out with a delay in places where burn-out is detrimental to a system or plant.

The present disclosure relates to apparatuses and methods that are useful for one or more aspects of a power production plant. More particularly, the disclosure relates to combustor apparatuses and methods for a combustor adapted to utilize different fuel mixtures derived from gasification of a solid fuel. Combustion of the different fuel mixtures within the combustor can be facilitated by arranging elements of the combustor controlled so that a defined set of combustion characteristics remains substantially constant across a range of different fuel mixtures.

One or more embodiments of a burner panel for a metallurgical furnace is described herein. The burner panel has a body having a top surface, a bottom surface, a left surface, a right surface, and a front surface surrounding an interior burner area. A spray-cool system disposed in the interior area. A burner tube at least partially disposed in the interior burner area and extends into the front surface. The burner tube is configured to accept a burner.

The purpose of the present invention is to improve workability when installing a cooling pipe and a burner oxidizer supply pipe through which fuel and an oxidizer are supplied to a combustion furnace or the like of a gasifier. A burner (2) is provided with: an air supply pipe (8) through which air is supplied into a combustion furnace (1); a cooling pipe (6) that is provided so as to surround a supply pipe (5); and a closed flange (7) which is detachably fixed to a furnace wall and to which the air supply pipe (8) and the cooling pipe (6) are fixed. The tip of the cooling pipe (6) on a furnace inside is arranged to project to the furnace inside more than the tip of the supply pipe (5) by a projection allowance length (L1).

A premixed low-nitrogen gas boiler is provided, which includes a reversed flow-swirl mixer being opposite mixing of natural gas and air. A flow deflector is arranged at a gas mixture outlet of the reversed flow-swirl mixer. An upper flow equalizing plate and a lower flow equalizing plate are arranged below the flow deflector, the upper flow equalizing plate is positioned above the lower flow equalizing plate, and a channel for enhancing mixing of gas mixture is formed between the upper flow equalizing plate and the lower flow equalizing plate. A comb-shaped water-cooled burner is arranged at the rear end of the lower flow equalizing plate, a combustion chamber is arranged at the rear end of the comb-shaped water-cooled burner, hearth tube bundles are arranged in a ladder-shaped convergent hearth, and the hearth tube bundles form an inner loop with a working medium water-steam mixture in a hearth water tank.

A fuel nozzle assembly comprising an annular slot surrounding a fuel nozzle, the annular slot having gas passages for feeding a gas into the slot and against an opposing wall of the slot. A method of operating a gas turbine engine including directing a gas flow into and across the slot against an opposing wall of the slot to generate a circulating gas flow filling the slot, the gas flow passing into the slot through one or more gas outlets within the slot and thereafter said gas flow exiting the slot into the combustion chamber, the gas outlets spaced away from the closed end of the slot. A gas turbine engine comprising a slot formed in a fuel nozzle assembly, the slot having one or more gas passages extending through a wall of the slot and feeding a gas into the slot against a another wall of the slot.

Submerged combustion burners having a burner body and a burner tip connected thereto. The burner body has an external conduit and first and second internal conduits substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. The burner includes a generally central flow passage for a combustible mixture, the flow passage partially defined by an inner wall of the burner tip. The burner tip has an outer wall and crown connecting the inner and outer walls. The inner and outer walls and crown comprise materials having greater corrosion and/or fatigue resistance than the burner external conduit. The burner tip is connected to the burner body by inner and outer connections, at least one of which includes members interference fit to the burner tip and burner body, the members welded, soldered, or brazed together, in certain instances by fiber laser welding.

The present disclosure relates to apparatuses and methods that are useful for one or more aspects of a power production plant. More particularly, the disclosure relates to combustor apparatuses and methods for a combustor adapted to utilize different fuel mixtures derived from gasification of a solid fuel. Combustion of the different fuel mixtures within the combustor can be facilitated by arranging elements of the combustor controlled so that a defined set of combustion characteristics remains substantially constant across a range of different fuel mixtures.