Abstract:
A two-piece, thermally resistant metal alloy heat shield (40) is provided for the central discharge orifice (34) of a two-fluid nozzle (10) for atomizing a liquid with a gas. The nozzle has at least a central conduit (12) and annular conduit (not shown) converging in an internal mixing zone for the liquid and gas and a central discharge orifice (34) having a shoulder (38) at its upstream end. The heat shield includes a retaining ring (46) and an outwardly flaring liner (44) for the orifice (34). The liner (44) is attached to the retaining ring (46) which bears against the shoulder (38) and is held in place by the flared construction at its downstream end. Preferably, the liner (44) has heat conductive flexible packing (54) disposed between its outside surface and the orifice (34). The orifice (34) may open into a protective cap (28) which is cylindrical at one end (30) and rounds out to an elliptical end surface (32).
Abstract:
A burner equipped with: an inside gas nozzle extending along an axis line while surrounding that axis line and capable of supplying to a furnace an oxygen-containing gas for inside combustion; a fuel supply nozzle that, when viewed in the direction along the axis line, surrounds the inside gas nozzle, and is capable of supplying to the furnace a fluid mixture of a solid powder fuel and a carrier gas; an outside gas nozzle that, when viewed in the direction along the axis line, surrounds the fuel supply nozzle, and is capable of supplying to the furnace an oxygen-containing gas for outside combustion; and a flow speed ratio adjustment mechanism capable of adjusting the relative flow speed ratio of the spray flow speed of the oxygen-containing gas for inside combustion and the spray flow speed of the oxygen-containing gas for outside combustion. Downstream from the outlet of the fuel supply nozzle, flame-holding regions are formed in the sprayed flow of the fluid mixture, these regions being formed respectively on the side of the sprayed flow of the oxygen-containing gas for inside combustion and on the side of the sprayed flow of the oxygen-containing gas for outside combustion.
Abstract:
Disclosed herein is a nozzle tip of a pulverized coal burner, which is capable of preventing the abrasion and separation of flame stabilizers due to the flow of pulverized coal. The nozzle tip includes an inner tubular body (100) having a first passage (120) in which pulverized coal introduced into the inner tubular body (100) flows, an outer tubular body (200) installed outside the inner tubular body (100) while being spaced apart therefrom, and at least one guide plate (300) installed to partition the first passage (120). The nozzle tip further comprises: a plurality of flame stabilizers (400) arranged in a row at the upper and/or lower side in the inner tubular body (100), wherein each of the flame stabilizers (400) has an inclined surface (420, 1420) formed on a side thereof facing a direction in which the pulverized coal flows in the first passage (120), the inclined surface (420, 1420) being inclined toward a central portion of the inner tubular body (100).
Abstract:
Disclosed is a combustion burner (1) provided with a fuel nozzle (2) for injecting fuel gas obtained by combining solid fuel and primary air, secondary air nozzles (3, 4) for injecting secondary air from the outer periphery of the fuel nozzle (2), and a flame stabilizer (5) disposed at the opening of the fuel nozzle (2). In the combustion burner (1), the flame stabilizer (5) has a split shape which widens in the flow direction of the fuel gas. Furthermore, in the section viewed in the direction that the flame stabilizer (5) widens, among the sections of the fuel nozzle (2) including the center axis, the maximum distance (h) between the center axis of the fuel nozzle (2) and the widened end of the flame stabilizer, and the inner diameter (r) of the opening (21) of the fuel nozzle (2) satisfy the relationship of h/ (r/2)
Abstract:
A system includes a feed injector (106) that may supply a feedstock (102) to a gasifier (108). The feed injector includes one or more conduits (228,232,238) extending toward a tip portion (220) having an outlet (218), cooling coil (308) coupled to the tip portion (220), and a protective shell (200) including a first protective shell portion (400) coupled to a second protective shell portion (500). The protective shell (200) surrounds the tip portion (220) and at least portions of the one or more conduits (228,232,238) and the cooling coil (308). The feed injector (106) also includes one or more mounting structures (208,210) disposed along an outer perimeter of the feed injector (106). The one or more mounting structures (208,210) may facilitate coupling of the first protective shell portion (400), the second protective shell portion (500), and the feed injector (106).
Abstract:
A biomass-mixed, pulverized coal-fired burner is provided. The biomass-mixed, pulverized coal-fired burner is capable of burning biomass fuel as auxiliary fuel in large quantities and burning only pulverized coal when the biomass fuel is not sufficiently available. The biomass-mixed, pulverized coal-fired burner 1 includes: a biomass fuel jet nozzle 20 that extends axially along the biomass-mixed, pulverized coal-fired burner 1; a pulverized coal fuel jet nozzle 30 that surrounds the biomass fuel jet nozzle 20; a secondary air nozzle 40 that surrounds the pulverized coal fuel jet nozzle 30; and a tertiary air nozzle 50 that surrounds the secondary air nozzle 40. A biomass fuel stream is jetted into an inside of a pulverized coal fuel flame formed in a furnace, the flame offering favorable ignition and flame holding performance.
Abstract:
The igniter lance (1) comprises a lance fuel duct (2) for pulverised fuel and an electric igniter (3) for ignition of the pulverized fuel passing through the lance fuel duct (2).
Abstract:
A biomass-mixed, pulverized coal-fired burner is provided. The biomass-mixed, pulverized coal-fired burner is capable of burning biomass fuel as auxiliary fuel in large quantities and burning only pulverized coal when the biomass fuel is not sufficiently available. The biomass-mixed, pulverized coal-fired burner 1 includes: a biomass fuel jet nozzle 20 that extends axially along the biomass-mixed, pulverized coal-fired burner 1; a pulverized coal fuel jet nozzle 30 that surrounds the biomass fuel jet nozzle 20; a secondary air nozzle 40 that surrounds the pulverized coal fuel jet nozzle 30; and a tertiary air nozzle 50 that surrounds the secondary air nozzle 40. A biomass fuel stream is jetted into an inside of a pulverized coal fuel flame formed in a furnace, the flame offering favorable ignition and flame holding performance.
Abstract:
Die Erfindung richtet sich auf einen Brenner mit einem Kernrohr (1) und einem unter Ausbildung eines kreisringförmigen Brennstoffförderquerschnitts (5) konzentrisch darum angeordneten Brennstoffrohr (4). Um eine Lösung zu schaffen, die es ermöglicht, eine vollständige Auflösung von Dichtstoff- oder Dichtstromsträhnen des Brennstoffs in dem Brenner sowie eine gleichmäßige Brennstoffverteilung auf den und in dem kreisringförmigen Brennstoffförderquerschnitt des Brennstoffrohres zu erzielen, wird mit der Erfindung vorgeschlagen, dass das Brennstoffrohr (4) brennstoffeintrittsseitig einen Tangential-Spiral-Eintrittskrümmer (6) aufweist, dessen freier Förderquerschnitt sich in einem von einem tangentialen Zuführbereich (7) ausgehenden, spiralförmig um das Kernrohr (2) herumgeführten Förderkanal (9) erstreckt, wobei sich die Ausdehnung des Förderkanals (9) im Verlauf seiner spiralförmigen Erstreckung durch Verringerung seiner Erstreckung sowohl in radialer als auch in axialer Richtung (13, 14) verkleinert.