Abstract:
Die Erfindung betrifft einen Brenner (13) mit einer Oberflächenverbrennung, welcher eine erste und zumindest eine weitere Brennerzone (34, 35) umfasst, die jeweils eine Zuführung (29, 37) für ein Brennstoff-Luft-Gemisch in einer Verbrennungszone (51) aufweisen und jeweils für jede Brennerzone (34, 35) eine Gewebemembran (49) umfassen, an die sich die Verbrennungszone (51) anschließt und mit jeweils einer Flammenrückschlagsperre (48), welche stromauf der Gewebemembran (49) und mit Abstand dazu angeordnet ist, wobei jede Brennerzone (34, 35) jeweils eine separate Zuführung (29, 37) für das Brennstoff-Luft-Gemisch aufweist und beide Brennerzonen (34, 35) jeweils eine in den Verbrennungszonen (51) in gleicher Richtung ausgerichtete Flammenmatrix (52) aufweisen.
Abstract:
The invention describes a gas premix burner (100) comprising a porous combustion surface (120, 140, 142), on which when the burner (100) is in use combustion occurs after the premix gas has flown through it, a fiber based cloth (120) forming at least part of the porous combustion surface (120, 140, 142); and a perforated plate (110), a woven wire mesh or expanded metal sheet. The fiber based cloth (120) is supported by the perforated plate (110), woven wire mesh or expanded metal sheet. One or more zones (140, 142) of the porous combustion surface (120, 140, 142) is or are not formed by the fiber based cloth (120), but by another porous substrate. The one or more zones (140, 142) are along their full circumference surrounded by the fiber based cloth (120).
Abstract:
Die Erfindung betrifft einen Prozessbrenner (F) sowie ein Verfahren zum Betreiben eines Reaktors (R) mit einem Prozessbrenner (F), der wenigstens einen ersten (G) und einen zweiten Hauptzuführungskanal (B) sowie zumindest zwei innerhalb des ersten Hauptzuführungskanals (G) endende Nebenzuführungskanäle (N1, N2) aufweist, wobei sowohl über die Haupt- (G, B) als auch die Nebenzuführungskanäle (N1, N2) ein Brenngas (1, 3) und ein Oxidationsmittels (2, 4) jeweils getrennt voneinander geführt werden können. Kennzeichnend hierbei ist, dass der Prozessbrenner (F) ein gasdurchlässiges Strömungswiderstandselement (P) aufweist, das am reaktionsraumseitigen Ende des ersten Hauptzuführungskanals (G) angeordnet ist und sich über dessen Strömungsquerschnitt erstreckt.
Abstract:
A burner box (100) includes a housing (110), a fuel tube (120) and a porous heat dissipating surface (130). The housing (110) is bounded by a sidewall (112). The sidewall defines an open passage (114) that allows unimpeded vertical airflow. The fuel tube (120) extends into the passage (114) and defines a plurality of spaced apart orifices (122) that distribute fuel into the open passage (114). The fuel tube (120) is at a distance from the top of the housing so that substantially all of the fuel is entrained by the combustion air before the fuel reaches the top. The heat dissipating surface (130) is disposed across the top of the housing (110) and supports a flame. The heat dissipating surface (130) includes enough open area so that the fuel/air mixture passes through the porous heat dissipating surface (130) unimpeded. The heat dissipating surface (130) dissipates heat from the flame and prevents flashback.
Abstract:
Herein a gas boiler burner (1) is described comprising a diffuser (2), suitable for diffusing premixed fuel gases in a combustion chamber (3), each cross-section of said diffuser (2) having a uniform radius of curvature, in which said diffuser (2) comprises a diffuser central portion (10) and two diffuser longitudinally peripheral portions (5), said two diffuser longitudinally peripheral portions (5) being connected together through said central diffuser portion (10), said central diffuser portion (10) extending longitudinally in a direction perpendicular to the flow of the fuel gases over a length 1 greater than zero and having a cross-section shaped as a circumference arc having a radius r, each of said diffuser longitudinally peripheral portions (5) being shaped as a portion of sphere having radius r.
Abstract:
A modulating gas burner (1; 1') which is designed for operation with premixing of a combustible air and gas mixture comprises a burner head (3; 3') to which the combustible air and gas mixture can be supplied, a device (6; 20) for guiding the flow of the mixture, which device can impart rotational components to the velocity of the flow to the burner head, and a flash-back prevention device (12; 24) positioned in the burner head, in such a way that the power at the burner (1; 1') can be modulated within a predetermined modulation range between a minimum power condition in which the burner operates predominantly in the manner of a premix burner without flame detachment or flash-back, and a maximum power condition in which the burner operates predominantly in the manner of a burner with recirculation of the flows of the reagents of the combustible mixture.
Abstract:
A modulating gas burner (1; 1') which is designed for operation with premixing of a combustible air and gas mixture comprises a burner head (3; 3') to which the combustible air and gas mixture can be supplied, a device (6; 20) for guiding the flow of the mixture, which device can impart rotational components to the velocity of the flow to the burner head, and a flash-back prevention device (12; 24) positioned in the burner head, in such a way that the power at the burner (1; 1') can be modulated within a predetermined modulation range between a minimum power condition in which the burner operates predominantly in the manner of a premix burner without flame detachment or flash-back, and a maximum power condition in which the burner operates predominantly in the manner of a burner with recirculation of the flows of the reagents of the combustible mixture.
Abstract:
A premix gas burner comprises a burner deck and a metal mounting plate comprising a plain section for mounting the burner in a heating appliance. The burner deck comprises a woven wire mesh onto which the flames are stabilized when the burner is in use. The woven wire mesh comprises a flange at its circumference. Part of the metal wires of the woven wire mesh are welded onto the metal mounting plate within the region of the flange. Metal wires that are welded onto the metal mounting plate have a first end provided in a first zone of the flange, and the second end is provided in a second zone of the flange. Ends of the metal wires that are welded onto the metal mounting plate are only welded to the metal mounting plate in the first zone or in the second zone of the flange.
Abstract:
Surface stabilized combustion is credited with high burning rates, wide modulation range and extended lean flammability limits. This makes it an attractive technology for compact low-emission combustors. This patent presents the invention of a surface burner 1 for gas combustion. The burner surface is fabricated by intertwining or interweaving an elongated flexible element 9 across a distinct burner frame 3. This fabrication method can be best referred to as braiding, but also plaiting, lacing or another comparable method.