Provided is a combustion device including: a burner that includes an ammonia injection nozzle having an injection port that faces an inner space of a furnace; and an adjustment structure that adjusts a separation distance between the injection port and the inner space.

Provided is a combustion device, including: a burner including an ammonia injection nozzle having an injection port that faces an inner space of a furnace; and an adjustment structure configured to adjust an opening area of the injection port.

Provided is a combustion device, including: a burner including an ammonia injection nozzle having an injection port that faces an inner space of a furnace; and an adjustment structure configured to adjust an opening area of the injection port.

A system including a variable orifice component including a main body, a main fuel path extending through the main body, and a control body positioned in the main body. The control body is movable between a first position wherein a first fuel path thereof is in fluid communication with the main fuel path to enable fuel to flow therethrough, and a second position wherein a second fuel path thereof is in fluid communication with the main fuel path to enable fuel to flow therethrough. The system further includes a vent body coupled to the main body. The vent body is movable between a first position wherein the main fuel path is in fluid communication with a vent orifice of the vent body to provide fluid communication between the main fuel path and a surrounding environment, and a second position wherein the main fuel path is not in fluid communication with the vent orifice.

A system including a variable orifice component including a main body, a main fuel path extending through the main body, and a control body positioned in the main body. The control body is movable between a first position wherein a first fuel path thereof is in fluid communication with the main fuel path to enable fuel to flow therethrough, and a second position wherein a second fuel path thereof is in fluid communication with the main fuel path to enable fuel to flow therethrough. The system further includes a vent body coupled to the main body. The vent body is movable between a first position wherein the main fuel path is in fluid communication with a vent orifice of the vent body to provide fluid communication between the main fuel path and a surrounding environment, and a second position wherein the main fuel path is not in fluid communication with the vent orifice.

The invention relates to a premixing method for premixing fuel with air prior to the combustion of a fuel/air mixture to allow burners to be operated at high output and with a good load variation range with stable and reliable operation and low NOx emissions. The method comprises: a) creating a rich fuel/air mixture with a fuel/air ratio above an ignitable fuel/air ratio, b) supplying air to the rich fuel/air mixture to obtain an ignitable fuel/air mixture, and c) swirling the ignitable fuel/air mixture obtained in step a) or b). The invention further relates to a premixing device for performing the method.

The invention relates to a premixing method for premixing fuel with air prior to the combustion of a fuel/air mixture to allow burners to be operated at high output and with a good load variation range with stable and reliable operation and low NOx emissions. The method comprises: a) creating a rich fuel/air mixture with a fuel/air ratio above an ignitable fuel/air ratio, b) supplying air to the rich fuel/air mixture to obtain an ignitable fuel/air mixture, and c) swirling the ignitable fuel/air mixture obtained in step a) or b). The invention further relates to a premixing device for performing the method.

A direct fuel injection system (206) is shown for injecting hydrogen fuel into a gas turbine combustor, the fuel injection system comprising a plurality of fuel injector blocks (1202). Each fuel injector block includes one or more air admission ducts (1603) for receiving air from a diffuser and an air outlet for delivering air into a mixing zone for combustion with fuel. Each fuel injector block also includes a fuel admission duct or aperture having a fuel inlet for receiving fuel (F) from a manifold, and a fuel outlet for delivering fuel into the mixing zone.

A fuel nozzle system is made available, which is arranged essentially in circular manner and is set up in such a manner that it produces a homogeneous leaner mixture on at least one outer ring and a homogeneous richer mixture on at least one inner ring, in particular a fuel/oxidizer mixture.

An auxiliary burner for an electric furnace capable of increasing and homogenizing the heating effect of iron scrap by suitably and efficiently burning solid fuel along with gas fuel. Auxiliary burner 100 for an electric furnace comprises a solid fuel injection tube 1, a gas fuel injection tube 2, and a combustion-supporting gas injection tube 3 in the stated order from the center side, all arranged coaxially, and is characterized in that: a combustion-supporting gas flow path 30 of the 10 combustion-supporting gas injection tube 3 is provided with a plurality of swirl vanes 4 for swirling the combustion-supporting gas, and the angle θ formed between the swirl vanes 4 and the burner axis is 5° or more and 45° or less.