摘要:
The invention relates to a gaseous fuel (including all mixtures thereof) burner structure, characterized in that it comprises: a housing defining a distal flame outlet end and a proximal gaseous fuel and air supply end, both ends having covers; a pressurized-air inlet arranged in the housing close to the proximal end, defining an inner pressurized-air-supply chamber; a pressurized-gaseous-fuel-supply duct arranged in the center, housed in a first mixing chamber and provided with a plurality of openings for the outflow of the gaseous fuel to said first mixing chamber, said first mixing chamber also comprising a plurality of openings for supplying pressurized air axially and radially; an igniter arranged inside said first mixing chamber for a first combustion; a second, over-mixing chamber arranged colinearly with said first chamber, the end of the fuel duct comprising a cover provided with openings via which gaseous fuel is axially supplied to said second, over-mixing chamber, and the wall of said second chamber comprising openings via which pressurized air is radially supplied, where a second stage of the combustion process is carried out; and a third, conical flame-formation chamber colinearly connected to the end of said second, over-mixing chamber.
摘要:
The present invention relates to a method for operating a lean premix burner of an aircraft gas turbine, where fuel and primary supporting air are supplied by means of a supporting burner (pilot burner) arranged centrically to the burner axis, where secondary air surrounding the supporting burner is supplied, and where fuel and air are supplied by means of a main burner, characterized in that the primary supporting air is supplied in an amount of 5 vol % to 10 vol % of the total air quantity, that the secondary supporting air is supplied in an amount of 5 vol % to 20 vol % and that 35 vol % to 75 vol % of the total air quantity are supplied via the main burner in the partial load range and in the full load range.
摘要:
A burner is disclosed for generating flame and heat. The burner includes a first stage, a second stage downstream of the first stage, a third stage downstream of the first and second stages, and a fourth stage downstream of the first, second, and third stages. The first stage comprises a first innermost air chamber and a first mixing chamber for air and fuel, wherein the first stage includes separate conduits for air and fuel, and wherein the air and fuel begin to mix in the first mixing chamber during use to form an air/fuel mixture. The second stage comprises a second mixing chamber which comprises a deflection plate to force the air/fuel mixture outward from the centerline. The third stage comprises a combustion zone. The combustion zone includes a swirl generator. The swirl generator has an inner diameter greater than an outer diameter of the deflection plate. The swirl generator produces a swirl, whirl, vortex, or the like in the flame during operation.
摘要:
Processes and systems for producing glass fibers having regions devoid of glass using submerged combustion melters, including feeding a vitrifiable feed material into a feed inlet of a melting zone of a melter vessel, and heating the vitrifiable material with at least one burner directing combustion products of an oxidant and a first fuel into the melting zone under a level of the molten material in the zone. One or more of the burners is configured to impart heat and turbulence to the molten material, producing a turbulent molten material comprising a plurality of bubbles suspended in the molten material, the bubbles comprising at least some of the combustion products, and optionally other gas species introduced by the burners. The molten material and bubbles are drawn through a bushing fluidly connected to a forehearth to produce a glass fiber comprising a plurality of interior regions substantially devoid of glass.
摘要:
Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.
摘要:
A combustion apparatus includes a combustion chamber having multiple combustion zones. A first wind box is in communication with the first combustion zone to feed the fuel to be fed into the combustion chamber for initial combustion of the fuel within the first combustion zone. A second wind box has a reburner in communication with the second combustion zone. The reburner is configured to feed fuel, a reagent and a first portion of the flue gas to be recycled to the second combustion zone into the second combustion zone to reduce nitrogen oxide emissions of the apparatus. A third wind box is in communication with the third combustion zone to feed air to the third combustion zone to complete the combustion process.
摘要:
Embodiments of the present invention include high-temperature staged recirculating burners and radiant tube burner assemblies that provide high efficiency, low NOx and CO emissions, and uniform temperature characteristics. One such staged recirculating burner includes a combustion tube having inside and outside helical fins forming opposing spiral pathways for combustion gases and products of combustion, a combustion nozzle coupled to the combustion tube, a gas tube running axially into the combustion tube, and a staging gas nozzle coupled to the gas tube, where the staging gas nozzle includes radial exit holes into the combustion tube and an axial gas staging tube extending into the combustion nozzle to stage combustion.
摘要:
The invention relates to a central burner for multi-fuel multiple lance burner systems having a central lance with an inner pipe and an outer pipe. The inner pipe and the outer pipe form an annular clearance duct. A plurality of outer lances are arranged around the central lance. A funnel-like mixing device is provided in the extension of the annular clearance duct in the region of the end of the inner pipe. This funnel-like mixing device has openings in its wall for combustion media to flow through. The outer lances each have a nozzle which has openings along the lateral circumferential area, said openings being arranged asymmetrically.
摘要:
A combustion burner 1 includes a fuel nozzle 2 that injects fuel gas prepared by mixing solid fuel and primary air, secondary air nozzles 3, 4 that inject secondary air from the outer periphery of the fuel nozzle 2, and a flame holder 5 that is arranged in an opening of the fuel nozzle 2. In the combustion burner 1, the flame holder 5 has a splitting shape that widens in the flow direction of the fuel gas. When seen in cross section along a direction in which the flame holder 5 widens, the cross section passing through the central axis of the fuel nozzle 2, a maximum distance h from the central axis of the fuel nozzle 2 to the widened end of the flame holder 5 and an inside diameter r of the opening 21 of the fuel nozzle 2 satisfy h/(r/2)