A swirl preburner that includes a first core defining a first swirl chamber having a first swirl chamber first end and a first swirl chamber second end, the first swirl chamber comprising a first diameter at the first swirl chamber first end and a second smaller diameter at the first swirl chamber second end that is smaller than the first diameter; and a second core defining a second swirl chamber having a second swirl chamber first end and a second swirl chamber second end, the second swirl chamber comprising a third diameter at the second swirl chamber first end and a fourth smaller diameter at the second swirl chamber second end that is smaller than the third diameter, the first diameter being smaller than the third diameter and larger than the fourth smaller diameter.

A swirl preburner that includes a first core defining a first swirl chamber having a first swirl chamber first end and a first swirl chamber second end, the first swirl chamber comprising a first diameter at the first swirl chamber first end and a second smaller diameter at the first swirl chamber second end that is smaller than the first diameter; and a second core defining a second swirl chamber having a second swirl chamber first end and a second swirl chamber second end, the second swirl chamber comprising a third diameter at the second swirl chamber first end and a fourth smaller diameter at the second swirl chamber second end that is smaller than the third diameter, the first diameter being smaller than the third diameter and larger than the fourth smaller diameter.

A micro-combustion device generating electrical power raises global performance of the system, is compact, and reduces losses by utilizing an induced helical path. The device includes: injection ducts inserting a combustion agent, a fuel and/or a mixture thereof wherein the injection of the combustion agent takes place tangentially to the internal cylindrical wall, inducing a helical combustion path, the internal cylindrical walls of the chamber having a deposition of catalytic material to accelerate the combustion reaction; a turbo compressor group, including a compressor, feeding under pressure the combustion chamber through the injection ducts, and a turbine, receiving the flue gases from the discharge duct, compressor and turbine being keyed on the same axis, whereon a generator of electrical power, in turn, is keyed; and a fuel cell, fed by the flue gases through the turbine and by an oxidizing agent, implementing an electrochemical process generating additional electrical power.

A swirl preburner having a first swirl core defining a first swirl chamber having a first swirl chamber first end and a first swirl chamber second end. The swirl preburner further includes a second swirl core defining a second swirl chamber having a second swirl chamber first end and a second swirl chamber second end. The swirl preburner also includes a mixing element defining a mixing chamber, the mixing chamber surrounding a portion of the first and second chamber at least including the first chamber second end and the second chamber second end.

A burner assembly for top combustion hot blast stove including a burner surrounded by a burner shell, where the burner has a circular cross-section; a number of air nozzles arranged for tangentially feeding air to the burner, the air nozzles being connected to one or more air distribution chambers; a number of gas nozzles arranged for tangentially feeding gas to the burner, the gas nozzles being connected to one or more gas distribution chambers; wherein the air nozzles are arranged in one or more inclined or vertical stacked arrays of air nozzles, each inclined or vertical stacked array being in connection with one inclined or vertical air distribution chamber; the gas nozzles are arranged in one or more inclined or vertical stacked arrays of gas nozzles, each inclined or vertical stacked array being in connection with one inclined or vertical gas distribution chamber; and the inclined or vertical air distribution chamber(s) and the inclined or vertical gas distribution chamber(s) are arranged along the circumference of the burner shell.

The present disclosure includes air spinners for use in duct burners, and duct burners and duct burner kits including a plurality of air spinners. Air spinners may include a plurality of blades extending radially outward from a fuel path and configured to impart rotation to air flowing between the blades, where the air spinner is configured to be coupled to a fuel runner of a duct burner such that the air spinner encircles a fuel outlet of the fuel runner with the axis of the fuel path extending at a non-parallel angle from an axis of the fuel runner. Duct burners can comprise a plurality of air spinners coupled to a plurality of fuel runners. Duct burner kits can comprise a plurality of air spinners configured to be coupled (e.g., without welding) to a plurality of fuel runners.

The present disclosure includes air spinners for use in duct burners, and duct burners and duct burner kits including a plurality of air spinners. Air spinners may include a plurality of blades extending radially outward from a fuel path and configured to impart rotation to air flowing between the blades, where the air spinner is configured to be coupled to a fuel runner of a duct burner such that the air spinner encircles a fuel outlet of the fuel runner with the axis of the fuel path extending at a non-parallel angle from an axis of the fuel runner. Duct burners can comprise a plurality of air spinners coupled to a plurality of fuel runners. Duct burner kits can comprise a plurality of air spinners configured to be coupled (e.g., without welding) to a plurality of fuel runners.

The invention comprises: a) first comburent supplying means (18) connected to the lower part of the oxidation chamber, for introducing pressurized oxygenated gas in the oxidation chamber at a speed that comprises a tangential component; b) a particle recirculation system, which comprises: a particle separator (24) on the upper part of the oxidation chamber for trapping hot particles of ash and unburned material, and a transportation system (25) for transferring trapped particles from the particle separator (24) to the base of the oxidation chamber; and c) a gas recirculation system comprising: a sucker (26) for suctioning combustion gases from the upper part of the oxidation chamber, and pipes (27) for transferring the suctioned gases to the base of the oxidation chamber. It provides an optimized thermal transfer that reduces the emission of pollutants in waste recovery.

A comprehensive utilization system for high-temperature gasification and low-nitrogen combustion of biomass comprises a gasifier, a boiler and a burner installed on the boiler. The outlet of the gasifier is connected to a fuel inlet of the burner. The boiler is provided with flue-gas exhaust ports connected to a chimney. Regenerative heat exchangers are provided between the flue-gas exhaust ports and the chimney, preheating air pipes are connected to the regenerative heat exchangers and then to an auxiliary mixing chamber. The auxiliary mixing chamber is provided with a first outlet connected to the inlet of the mixer, and a second outlet connected to the high-temperature air inlet of the gasifier and the second combustion-air inlet of the burner. An outlet of the mixer is connected with the first combustion-air inlet of the burner. The chimney is connected with the flue gas inlet of the gasifier through pipes and fans.

The present disclosure includes air spinners for use in duct burners, and duct burners and duct burner kits including a plurality of air spinners. Air spinners may include a plurality of blades extending radially outward from a fuel path and configured to impart rotation to air flowing between the blades, where the air spinner is configured to be coupled to a fuel runner of a duct burner such that the air spinner encircles a fuel outlet of the fuel runner with the axis of the fuel path extending at a non-parallel angle from an axis of the fuel runner. Duct burners can comprise a plurality of air spinners coupled to a plurality of fuel runners. Duct burner kits can comprise a plurality of air spinners configured to be coupled (e.g., without welding) to a plurality of fuel runners.