Coaxial Patents (Class 431/284)
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Patent number: 6857868Abstract: A burner assembly includes a generally cylindrical burner tube having a combustion chamber. The burner tube supplies combustion air and combustion gas to the combustion chamber. A burner head assembly is disposed in the burner tube upstream of the combustion chamber. The burner head assembly includes a plurality of flame retention plates having a plurality of changeable flame retention plates removably mounted thereto. The flame retention plates include a base plate, at least one intermediate plate, and a top plate. Each of the base plate, the intermediate plate, and the top pate includes a plurality of combustion air flow and combustion gas flow apertures.Type: GrantFiled: August 20, 2003Date of Patent: February 22, 2005Assignee: Midco International, Inc.Inventors: Ceji Li, Qin-Lai Yu
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Publication number: 20040259046Abstract: An apparatus for producing a sustained flame, comprising: an inner wick with a hollow center; an outer wick disposed around the inner wick, wherein the region between the inner wick and the outer wick defines an inter-wick region, and wherein the region around the outer wick defines an outer wick peripheral region; at least one fuel reservoir, for containing a flame-fueling liquid, in communication with at least one of the wicks; a first air container; a first air channel connecting the first air container to the center of the inner wick; and a second air container.Type: ApplicationFiled: July 13, 2004Publication date: December 23, 2004Inventor: Susumu Matsuyama
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Publication number: 20040234912Abstract: A gas injector for a furnace or boiler gas-fired burner has a plurality of peripheral openings around a center opening. The peripheral openings are pitched radially away from the longitudinal axis of the gas injector and also pitched either clockwise (CW) or counter-clockwise (CCW), to impart a swirling motion to gaseous fuel exiting the injector through the openings. The gas injector with the radial plus CW or CCW pitched peripheral openings has reduced flame length and lower CO emissions and only slightly elevated levels of NOx emissions relative to a gas injector with only radially pitched openings. The gas injector is useful in furnaces having small enclosures to prevent burner flames from impinging on the opposing walls.Type: ApplicationFiled: May 21, 2003Publication date: November 25, 2004Inventors: Hamid Sarv, Ronald C. Lenzer
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Publication number: 20040234915Abstract: A burner assembly has a ring generally centered on an axis and defining an array of outwardly open holes and a compartment at the axis. A gas/air mixture is fed to the ring to project jets of the mixture from the holes so that, when ignited, the jets form a main annular flame centered on the axis. A relatively small burner in the compartment is generally centered on the axis, and a horizontal plate on the ring overlies and covers the compartment and the burner. A gas/air mixture is supplied to the burner to the burner to form in the chamber underneath the plate a small flame centered on the axis. The cover plate is a generally circular disk having an outer diameter greater than an outer diameter of the small burner. The disk outer diameter is greater than an inner diameter of the ring.Type: ApplicationFiled: April 1, 2004Publication date: November 25, 2004Applicant: ISPHORDING Germany GmbHInventors: Jurgen Koch, Robert Zink
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Publication number: 20040219466Abstract: A swirl-type internal flame recirculation burner apparatus and method as used to fire asphalt plant aggregate dryers, air heaters and calcining kilns and method includes a compressed air oil atomizer assembly. The burning and swirling fuel and primary main combustion air mixture recirculates upstream along the burner axis. The secondary main combustion air may be swirled. The burner may also be fired on gas or a combination of gas and oil.Type: ApplicationFiled: May 2, 2003Publication date: November 4, 2004Inventors: John A. Marino, James J. Feese, Raymond F. Baum
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Patent number: 6796790Abstract: A burner assembly for a radiant burner includes a burner tube structure in the form of an elongated burner conduit having spaced inlet and outlet ends. The conduit is adapted and arranged for directing a fuel lean gaseous mixture comprising a portion of the total fluid fuel to be combusted and oxygen therealong from the inlet end to the outlet end. The assembly also includes a main burner nozzle at the outlet end of the conduit, which nozzle has a central axis, a wall extending around a centrally located chamber therein, and a downstream end spaced from the outlet end of the conduit. The main burner nozzle is arranged and adapted for receiving the mixture from the conduit in the chamber and redirecting the same through a plurality of apertures in the wall and into a combustion zone in a direction transverse to the axis and at a velocity which is greater than the flame speed of the gaseous mixture.Type: GrantFiled: September 7, 2001Date of Patent: September 28, 2004Assignee: John Zink Company LLCInventors: Demetris T. Venizelos, Wesley Ryan Bussman, Ralph Robert Hayes, Jesse S. Chambers, Roger L. Poe
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Patent number: 6793483Abstract: A combustion burner includes an air supply case connected to an air supply mouth a position at a position on the air supply case from a rear end part to a tip portion thereof, which supplies air from air supply equipment; a nozzle body attached so as to cover a tip portion of the air supply case, and having a jet nozzle formed in a center part of the nozzle body; a fuel nozzle in the nozzle body so as to supply air from the air supply case through an air jet hole, placed between the tip perimeter part of the fuel nozzle and the jet nozzle, having a frusto-conically shaped fuel supply passage, and which supplies air from a tip portion thereof; a plurality of air guide holes provided between an outer circumferential portion of the fuel nozzle and the nozzle body so as to supply air from the air jet hole in a spiral pattern; a fuel supply support member in the fuel supply passage, which supplies fuel from at least two fuel supply holes in an opposite spiral pattern from the tip end of the fuel nozzle; and at leaType: GrantFiled: February 26, 2003Date of Patent: September 21, 2004Inventor: Masahiro Watanabe
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Patent number: 6780008Abstract: A gas stove burner has a base defining an axis and a ring assembly sitting on the base, forming therewith an annular outer compartment and a central inner compartment, and formed with an array of outwardly open lower passages open radially inward into the outer compartment. A generally imperforate cover disk overlying the ring assembly has an outer edge, upwardly closes the inner compartment, and forms with the ring assembly an array of upper passages open radially inward into the inner compartment and radially outward at the disk outer edge. Inlets on the base feed respective gas/air mixtures to the compartments and form a main flame at the edge from the mixture exiting the lower passages and a simmer flame at the edge from the mixture exiting the upper passages.Type: GrantFiled: May 16, 2003Date of Patent: August 24, 2004Assignee: Isphording Germany GmbHInventors: Jürgen Koch, Robert Zink
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Patent number: 6773256Abstract: An ultra low NOx burner for process heating is provided which includes a fluid based flame stabilizer which provides a fuel-lean flame at an equivalence ratio in the range of phi=0.05 to phi=0.3 and fuel staging lances surrounding the flame stabilizer in circular, flat, or load shaping profiles, each lance comprising a pipe having a staging nozzle at a firing end thereof, each lance having at least one hole for staging fuel injection, and each hole having a radial divergence angle and an axial divergence angle. The at least one hole and the divergence angles provide circular, flat or load shaping flame pattern. The burner provides NOx emissions of less than 9 ppmv at near stoichiometry combustion conditions.Type: GrantFiled: February 5, 2002Date of Patent: August 10, 2004Assignee: Air Products and Chemicals, Inc.Inventors: Mahendra Ladharam Joshi, Kevin Ray Heier, Aleksandar Georgi Slavejkov
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Patent number: 6764302Abstract: An atomizing nozzle for a burner, especially for a heater that can be used on a vehicle includes a first flow guide element (34), which provides a flow guide surface (40) and has an atomizing lip (48) in an axial end area in relation to a central axis (A) of the nozzle, a second flow guide element (36) defining a first flow space area (30) leading to the atomizing lip (48) together with the first flow guide element (34). A fuel feed device (54) in the second flow guide element (36) is provided for applying fuel through the first flow space area (30) onto the flow guide surface (40) of the first flow guide element (34). Provisions are made for the fuel feed device (54) to have at least one fuel feed channel section (58) in the second flow guide element (36), which said fuel feed channel section (58) is open toward a surface area (44; 44′) of the second flow guide element (36) and has a surface normal radial component different from zero.Type: GrantFiled: January 21, 2003Date of Patent: July 20, 2004Assignee: J. Eberspacher GmbH & Co. KGInventors: Günter Eberspach, Walter Blaschke
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Patent number: 6742514Abstract: A burner apparatus for an outdoor cooking stove includes a hollow gas distribution ring, and an attached fuel conduit for sending fuel thereto. The gas ring has a hollow plenum formed therein. In a specific embodiment, the gas ring includes a base portion and an annular cap which is attachable to the base portion, and the annular cap has a plurality of primary apertures formed therethrough, as well as a plurality of secondary apertures which are smaller than the primary apertures. The secondary apertures are located at a level below the primary apertures. The fuel conduit has a hollow passage formed therethrough, which is in fluid communication with the plenum of the gas distribution ring. An outdoor cooking stove including the burner apparatus is also described, along with a kit for constructing same.Type: GrantFiled: June 7, 2002Date of Patent: June 1, 2004Assignee: Eastman OutdoorsInventor: Robert Eastman, II
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Patent number: 6702571Abstract: A combustion system for automatic, real-time control of a combustion process which can be applied with significant advantage to a wide range of furnaces, boilers and combustors. The system includes a burner body having a primary first fluid inlet end forming at least one primary first fluid inlet and a first fluid outlet end forming at least one first fluid outlet. An inner conduit is disposed within the burner body, forming a fluid flow region between the burner body and the inner conduit. The inner conduit has a second fluid inlet distal from the first fluid outlet and a second fluid outlet proximate the first fluid outlet. An internal adjustment device is provided for adjusting a flow cross-sectional area for a first fluid and/or a second fluid disposed within the burner body.Type: GrantFiled: September 5, 2001Date of Patent: March 9, 2004Assignee: Gas Technology InstituteInventors: Hamid A. Abbasi, David M. Rue, John C. Wagner
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Publication number: 20040023179Abstract: The aim of the invention is to produce a spray burner, starting from a conventional spray burner, for the atomisation and combustion of sulphur-containing residues, comprising a residue nozzle, for the introduction of sulphur-containing residue, which is surrounded by an outer nozzle, for the introduction of an atomising agent, whereby said burner is suitable for a method in which oxygen can be introduced in the cracking oven as additional oxidising agent to increase the capacity and improve the economic efficiency without the above disadvantages and limitations and is also optimised for a variable throughput of residue for atomising. Said aim is achieved whereby the residue nozzle comprises a multiplicity of individual nozzles which may be switched on and off, connected to an input for the residue, an inlet for fuel is provided and the outer nozzle is connected to an inlet for an oxygen-enriched gas stream.Type: ApplicationFiled: August 11, 2003Publication date: February 5, 2004Inventors: Gerhard Grob, Heinz Gruning
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Patent number: 6682339Abstract: A flame stabilizing apparatus is disclosed for application to a burner for a flame hydrolysis deposition (FHD) process. In the flame stabilizing apparatus, a co-flow diffusion flame burner emits a flame onto a substrate and a flame stabilizer, installed around the burner coaxially, isolates the emitted flame from an instable ambient flow to stabilize the flame and a particle flow.Type: GrantFiled: January 15, 2002Date of Patent: January 27, 2004Assignee: Samsung Electronic Co., Ltd.Inventor: Jae-Geol Cho
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Patent number: 6652268Abstract: A burner assembly including a housing having an air inlet and a burner end. An impeller that is mounted in the housing is in communication with the air inlet and adapted to direct air toward the burner end of the housing. The burner assembly also includes an inner air tube that is mounted in the burner end of the housing so as to define an inner combustion zone and an outer combustion zone.Type: GrantFiled: January 31, 2003Date of Patent: November 25, 2003Assignee: Astec, Inc.Inventors: Bruce C. Irwin, Russell Fountain, Malcolm Swanson, Joseph Unjakoti, Michael Swanson
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Patent number: 6632084Abstract: A burner configuration with primary and secondary pilot burners is described. The burner configuration is used in a firing installation, in particular a gas turbine combustion chamber, and has a main burner and, disposed centrally within it, a primary pilot burner used for igniting and/or for stabilizing the combustion of the main burner. For additional stabilization, for reducing rumble noises in the firing installation and for avoiding the possible flashback of the flame in a partial region of the burner, which can then sometimes occur, a plurality of outlet openings, which together form a secondary pilot burner, are disposed in the outlet region of the main burner. The flames of the secondary pilot burner surround the main flame like a ring and additionally stabilize the operation under different load conditions.Type: GrantFiled: February 27, 2001Date of Patent: October 14, 2003Assignee: Siemens AktiengesellschaftInventor: Peter Berenbrink
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Patent number: 6609905Abstract: The invention relates to a catalytic burner (1) of a combuster (2), in particular of a power station installation, comprising an annular duct (4) leading to the combuster (2), a catalyzer (5) arranged in the annular duct (4), a primary injection device (7) for injecting a fuel into the annular duct (4) upstream of the catalyzer (5), a secondary injection device (3) for directly injecting a fuel into the combuster (2). To stabilize a recirculation zone (29) in the combuster (2), a swirl generation device (6) is provided, which is arranged in the annular duct (4) downstream of the catalyzer (5) and subjects a flow through the catalyzer (5) to a swirl.Type: GrantFiled: April 26, 2002Date of Patent: August 26, 2003Assignee: Alstom (Switzerland) Ltd.Inventors: Adnan Eroglu, Timothy Griffin, Jaan Hellat
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Patent number: 6607376Abstract: A low NOx burner nozzle assembly for a radiant wall burner includes an elongated hollow burner tube and a discharge nozzle. The burner tube defines a conduit for supplying a mixture of fuel and air to a radiant combustion area of a combustion zone that surrounds the nozzle assembly. The discharge nozzle is mounted on the tube at the downstream end of the conduit adjacent the radiant combustion area and the same is adapted for directing the mixture of fuel and air into the radiant combustion area in an essentially radial direction. The discharge nozzle includes a plurality of flow directing members arranged in an array which extends circumferentially around the discharge nozzle, and the same are arranged to define therebetween a plurality of passageways which extend in a generally radial direction. The passageways are arranged so as to have different respective flow areas. The discharge nozzle also has an end cap to prevent axial flow of the primary air/fuel mixture.Type: GrantFiled: March 12, 2001Date of Patent: August 19, 2003Assignee: John Zink Company, LLCInventor: Roger L. Poe
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Patent number: 6595198Abstract: A collapsible portable stove may include a chassis, side tables, a shelf assembly, leg assemblies, a fuel delivery system, a burner system, a windscreen assembly, and a hoist assembly. The side tables may slide outward to reveal the burner system and provide workspace. The shelf assembly may attach to an underside of the chassis for storage, to a topside of the chassis between the outward-slid side tables for table space, or beneath the chassis between the leg assemblies for shelf space. The leg assemblies may fold for storage and unfold to raise the stove to a low- or high-profile. In a collapsed position, the stove and its self-contained components resemble a rectangular suitcase. The stove may be expanded from the collapsed position to several possible configurations, optionally having high- or low-profiles, exposed and/or covered burners, side tables, a hoist assembly, and a middle shelf or a middle table.Type: GrantFiled: July 10, 2001Date of Patent: July 22, 2003Assignee: The Coleman Company, Inc.Inventors: Robert Mosher, Darrell Neugebauer, David Linnebur, Justin Radford
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Patent number: 6575734Abstract: A low emissions burner includes a diffusion burner surrounded by an annular array of premix burners. The diffusion burner operates at maximum swirl air flow and at a low constant fuel rate to reduce NOx emissions. The diffusion burner provides a stable swirling diffusion flame. An annular array of premix burners surrounds the diffusion burner and provides a non-swirling premix flame about the diffusion flame to advantageously provide a higher heat content about the periphery of the burner flame to facilitate industrial drying processes using the burner. The diffusion burner flame maintains the premixed flame stabilized. Water injection nozzles are provided each of the premix and diffusion burners.Type: GrantFiled: August 30, 2000Date of Patent: June 10, 2003Assignee: Gencor Industries, Inc.Inventors: David F. Brashears, Grover T. Butler, Joseph T. Mollick
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Patent number: 6558153Abstract: A combustion method and burner system are disclosed herein. The burner system comprises: a fuel manifold comprising a housing, the housing defining an interior area comprising a chamber. The burner system comprises a set of injectors for injecting a fuel from the chamber into a stream of air to pre-mix the fuel and the air, the set of injectors disposed radially inward from the fuel manifold. The system includes a refractory located downstream of the fuel manifold, the refractory to shape a flame and the refractory comprising a plurality of channels for at least one of introducing air and combustion product into a combustion chamber, the combustion chamber located downstream of the refractory. The system can also include steam and/or water injection.Type: GrantFiled: March 30, 2001Date of Patent: May 6, 2003Assignee: Aqua-Chem, Inc.Inventors: Wayne D. Schutz, Eugene A. Showers
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Patent number: 6551098Abstract: A variable firing rate fuel burner has a tubular body configuration defined by a central pilot tube coaxially circumscribed by intermediate and outer firing tubes. A pilot fuel-air mixture is flowed through the pilot tube and ignited to maintain a pilot flame at the open outlet end of the burner body. During firing of the burner, separate fuel-air mixtures are flowed through an intermediate annulus between the intermediate firing tube and the pilot tube, and an outer annulus between the intermediate firing tube and the outer firing tube. As these fuel-air mixtures exit the burner body they are ignited by the pilot flame, with the fuel-air mixture exiting the outer annulus serving as a flame shaping mechanism to provide the overall burner flame with a controlled, elongated shape. By using two separate fuel-air mixture flows surrounding the pilot fuel-air mixture flow, the firing rate of the burner may be easily modulated, and the burner may be simultaneously operated with two different types of fuel.Type: GrantFiled: February 22, 2001Date of Patent: April 22, 2003Assignee: Rheem Manufacturing CompanyInventor: Raymond I. Hallit
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Patent number: 6508645Abstract: A burner head for a gas burner for improved flame stability and burner turndown is positioned in a longitudinally extending blast tube with an open end. The burner head includes a first surface facing in a direction transverse to the longitudinally extending blast tube and toward the open end, a second surface facing a direction transverse to the longitudinally extending blast tube and away from the open end and a third surface extending between the first and second surfaces. A first plurality of gas ports extends through the third surface, and a first passageway extends from the first surface to the second surface and is adapted to allow air to pass therethrough. A flame rod extends through the first passageway and into the flame zone.Type: GrantFiled: August 28, 2001Date of Patent: January 21, 2003Assignee: Power Flame IncorporatedInventor: Kenneth R. George
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Patent number: 6488496Abstract: A combination burner for selectively firing oil, natural gas and liquid propane. A modular first section has primary and secondary air tubes coaxially arranged therein and communicates with the main combustion air supply fan. A modular section is joined by bolts or the like to the first section and into which the primary and secondary air tubes extend. A center air spin vane rack is upstream of the secondary air tube in the first section. An adjustable spin vane rack is located radially outwardly of the secondary air tube for selectively spinning the main combustion air for flame adjustability. An air diverter is provided at a downstream end of the primary air tube. A compressed air atomizer is also at the downstream end of the primary air tube.Type: GrantFiled: September 6, 2001Date of Patent: December 3, 2002Assignee: Hauck Manufacturing Co.Inventors: James J. Feese, Raymond F. Baum, Edward E. Moore, Bruce C. Irwin
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Patent number: 6485289Abstract: A NOx reduction burner system and process. Fuel modification and fuel rich reactor zone gases are brought together with products from a fuel lean reactor zone in a low temperature burnout and NOx reduction reactor zone. The fuel modification fuel rich reactor stabilizes combustion through recirculation of hot gases to the reactants. Nitrogenous species decay reactions in the fuel rich zone controls the production of NOx. The nitrogenous species from the fuel rich zone and the NOx from the fuel lean zone then react in the burnout zone at an optimal temperature and nitrogenous species mix where NOx is minimized. Temperature in all zones, and in particular the burnout zone, can be controlled by furnace gas entrainment, induced flue gas recirculation, forced flue gas recirculation and active cooling by radiative and/or convective heat transfer. NOx can be even further reduced by introducing ammonia, or a like amine species, into the low temperature burnout zone.Type: GrantFiled: January 8, 2001Date of Patent: November 26, 2002Assignee: Altex Technologies CorporationInventors: John T. Kelly, Mehdi Namazian
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Publication number: 20020164553Abstract: A burner of radiant atmospheric type, comprising a porous ceramic element, positioned to close a chamber into which a gas/air mixture is fed, there being provided at least a second chamber adjacent to the first, both being closed by the porous ceramic element.Type: ApplicationFiled: April 26, 2002Publication date: November 7, 2002Inventors: Alessandro Distaso, Daniele Franchi, David Barrero
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Patent number: 6443728Abstract: A gas pipe ignitor 10 is provided which is operable to ignite a non-premixed air and fuel mixture and includes an air supply conduit 20 which has an axis ASL, a supply end 22, and a flame end 24 axially spaced from the supply end 22. The gas pipe ignitor also includes a fuel supply conduit 26 extending axially interiorly within at least a portion of the air supply conduit 20 and having an entrance end 28 and an exit end 30. The gas pipe ignitor further includes two branch passages 32 each communicated with the fuel supply conduit 26. The gas pipe ignitor also includes a deflector body 38 disposed in the air supply conduit 20 and is configured relative to the air supply conduit 20 such that air flowing in the air supply conduit 20 flows along a pass through passage PTP from upstream of the upstream most surface 40 of the deflector body 38 to downstream of the deflector body 38.Type: GrantFiled: March 19, 2001Date of Patent: September 3, 2002Assignee: Alstom (Schweiz) AGInventors: Carl D. Edberg, Raymond D. MacWhinnie, David J. Matteson, Raymond W. Cournoyer
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Patent number: 6439881Abstract: Improved burner performance is achieved by providing an atmospheric gas burner with a spiral-shaped burner body. A plurality of ports is formed in the burner body so as to be in fluid communication with the burner's internal chamber. Preferably, the burner body includes a substantially cylindrical hub section and an arm section that is joined at one end to the hub section and bends around the hub section.Type: GrantFiled: March 28, 2000Date of Patent: August 27, 2002Assignee: General Electric CompanyInventors: Joel Meier Haynes, Victor Caloca, Jeronimo Ramirez
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Patent number: 6425389Abstract: A gas burner configuration has two cooking areas disposed symmetrically in a cooker hob. The gas burner configuration has gas fittings that influence a gas flow to each of the cooking areas and whose actuating members extend out from the front of an operating panel. The cooking areas have similarly constructed burner units with gas/air mixture feed ducts which are aligned in a V-shaped fashion with gas outlet nozzles of gas nozzles of, in each case, one gas injector nozzle configuration of the gas fittings disposed in a front area of the cooker hob.Type: GrantFiled: December 23, 1998Date of Patent: July 30, 2002Assignee: BSH Bosch und Siemens Hausgeraete GmbHInventor: Bernd Mühle
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Patent number: 6422858Abstract: Low NOx apparatus and methods for burning liquid and gaseous fuels are provided by the present invention. The apparatus of the invention is basically comprised of a housing having an open discharge end attached to a furnace space, means for introducing a controlled quantity of air into the housing and into the furnace space, a combustion compartment disposed within the housing for providing a primary combustion zone therein having an open inlet end for receiving a portion of the air introduced into the housing and an open discharge end, a liquid fuel nozzle attached to the housing for discharging liquid fuel into the primary combustion zone, at least one primary gaseous fuel nozzle for discharging primary gaseous fuel into the primary combustion zone and at least one secondary gaseous fuel nozzle for discharging secondary gaseous fuel into the furnace space.Type: GrantFiled: September 11, 2000Date of Patent: July 23, 2002Assignee: John Zink Company, LLCInventors: I-Ping Chung, Joseph Colannino, Christoph Strupp
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Publication number: 20020064741Abstract: The present application relates to a burner block (1) comprising a base (2), a plurality of hydrocarbon channels (3) for the passage of hydrocarbon/air mixtures used as reactants, and at least one oxygen channel (4) for the passage of air or an air/oxygen mixture. An ignition burner (5) is optionally present. The burner block allows the combustion of hydrocarbons for the preparation of acetylene at temperatures of <1400° C.Type: ApplicationFiled: August 15, 2001Publication date: May 30, 2002Inventors: Bernd Bartenbach, Dieter Stapf, Michael Bachtler, Olaf Scheidsteger, Peter Passler
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Patent number: 6367288Abstract: In furnaces for producing high purity fused silica glass boules, glass particles have a tendency to build-up adjacent the burner hole rim. It was discovered that unburned furnace gases containing silica particles where re-circulated in the furnace close to the burner hole rim and reacted with the oxygen of infiltrated air adjacent the burner hole, and thus deposited such particles in the form of a glassy build-up about the rim of the burner hole. In order to eliminate the source of oxygen adjacent the burner hole rim, a curtain of an inert gas is caused to flow through the burner hole between the sidewalls of the burner hole and the flame of the burner. Accordingly, the curtain of inert gas inhibits the combustion of the unburned hydrogen and carbon monoxide furnace gases adjacent the exit rim of the burner hole and thereby minimizes glass build-up about the burner hole rim.Type: GrantFiled: December 29, 1999Date of Patent: April 9, 2002Assignee: Corning IncorporatedInventors: Raymond E. Lindner, Robert E. McLay, Mahendra K. Misra, Michael H. Wasilewski
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Patent number: 6347937Abstract: A direct coal fired burner system for a rotary kiln in which the burner has a multi-barrel construction through which primary air for conveying coal is heated with tertiary air sourced from the rotary kiln, and the shape of the emerging flame is controlled by a first annulus of swirling tertiary air adjacent the primary airstream and by a second annulus of laminar tertiary air defining an outer envelope for the flame. The volume and relative velocities of air in the tertiary air supplies are all controllable through the use of respective dampers provided in tertiary air supply conduits.Type: GrantFiled: January 21, 2000Date of Patent: February 19, 2002Assignee: ATS Spartec Inc.Inventors: Bruce Yearham, Gerald Plant
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Patent number: 6332460Abstract: A gas burner assembly particularly for incorporated cooking hobs in a gas cooker, having at least two nozzles selectively feedable to form corresponding gas/air mixtures in two separate mixing chambers provided with flame orifices, said flame orifices being positioned on two different levels. The burner assembly is selectively operable to provide a full range of gas cooking powers.Type: GrantFiled: January 27, 2000Date of Patent: December 25, 2001Assignee: Officine Meccaniche Defendi S.R.L.Inventor: Carlo Paesani
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Patent number: 6325619Abstract: A gas burner with multiple gas rings comprising: a burner body (6) mountable underneath a top plate, with a cut-out section, of an appliance and incorporating a first, upwardly directed gas injector (14) and a second gas injector (9) followed by a horizontal tubular Venturi (10) opening into a vertical well (12); an outer burner head (3) seated on the body (6) through the cut-out section and spaced at a distance above the plate and provided with an annular chamber (22) open above the well (12) and having one or two rows of orifices for flames (4,5); and an inner burner head (1) shaped so as to have a radial divergent (37) coaxially supplied by the first injector through a recess located at the center (31) of the head (3), ports being provided in the head (3) so that all the primary air and the secondary air needed to operate the multiple burner arrives from the top of the top plate of the appliance.Type: GrantFiled: January 26, 2001Date of Patent: December 4, 2001Assignee: SourdillonInventor: Bernard Dane
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Patent number: 6322354Abstract: A stacked dual gas burner which achieves good performance at high firing rates as well as good simmer performance at low firing rates. The stacked dual gas burner includes a main burner and a second (simmer) burner. The main burner and second burner are positioned in a stacked relation in a burner assembly, with the second burner positioned coaxially with and below the main burner. The second burner radius is smaller than the main burner radius, such that a portion of the main burner overhangs the second burner adjacent to the second burner ports. Recirculation underneath the overhanging edge of the main burner above the simmer burner ports helps maintain flame attachment at the second burner ports. A valve may be used to provide separately controllable flows of fuel to each of the main and second burners.Type: GrantFiled: July 17, 2000Date of Patent: November 27, 2001Assignee: Wolf Appliance Company, LLCInventors: Philip Carbone, Judith Reich, Steven Hobson, Amnon Bar-Ilan, Matthew Brekken
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Patent number: 6318357Abstract: A gas burner configuration for cooking areas includes a multi-ring gas burner having an inner burner with laterally aligned gas/air mixture outlet openings and an annular outer burner, disposed at a spacing from the inner burner, with gas/air mixture outlet openings. A hand-operated gas fitting directs, meters, and shuts off the combustion gas, which can be fed to the multi-ring burner through separate pipelines. The gas fitting has valves and three gas duct branches to be opened and closed by the valves using an operating member adjustable to different setting positions. Two of the branches each provide a constant gas throughput, and the third provides variable gas throughput. One of the constant gas throughput branches is associated with the inner burner and is opened by one valve over and entire actuating path of the operating member. The other of the constant gas throughput branches and the variable throughput branch are associated with the outer burner and opened by other valves.Type: GrantFiled: September 13, 2000Date of Patent: November 20, 2001Assignee: BSH Bosch und Siemens Hausgeraete GmbHInventors: Bernd Mühle, Werner Gronnenberg, Jörn Naumann
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Publication number: 20010024774Abstract: A burner configuration with primary and secondary pilot burners is described. The burner configuration is used in a firing installation, in particular a gas turbine combustion chamber, and has a main burner and, disposed centrally within it, a primary pilot burner used for igniting and/or for stabilizing the combustion of the main burner. For additional stabilization, for reducing rumble noises in the firing installation and for avoiding the possible flashback of the flame in a partial region of the burner, which can then sometimes occur, a plurality of outlet openings, which together form a secondary pilot burner, are disposed in the outlet region of the main burner. The flames of the secondary pilot burner surround the main flame like a ring and additionally stabilize the operation under different load conditions.Type: ApplicationFiled: February 27, 2001Publication date: September 27, 2001Inventor: Peter Berenbrink
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Publication number: 20010018173Abstract: The process relates to the operation of a hybrid burner. The hybrid burner has a premix burner and a pilot burner. The premix burner includes a premix air supply duct, into which a premix fuel supply duct opens. The pilot burner includes an air supply duct and a fuel supply duct for liquid and/or gaseous fuel. When the hybrid burner is in operation, air is supplied through the air supply duct and through the premix air supply duct, oil is supplied through the fuel supply duct and water is supplied through the premix fuel supply duct.Type: ApplicationFiled: February 20, 2001Publication date: August 30, 2001Inventor: Carsten Tiemann
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Patent number: 6270338Abstract: The object of the invention is to provide a method for operating a premix burner which has improved operational reliability and functioning during certain types of operation. In addition, it is intended to specify a corresponding premix burner for carrying out the method. According to the invention, this is achieved by the fact that at least one liquid fuel (2) is injected into the inner chamber (9) of the premix burner (4) in a plain jet (26, 26′) with an injection angle &agr; of less than 10°. For this purpose, the liquid-fuel nozzle (17) has a simple injection opening (19) with a guide length (1) and with a diameter (d).Type: GrantFiled: October 27, 1998Date of Patent: August 7, 2001Assignee: Asea Brown Boveri AGInventors: Adnan Eroglu, Jaan Hellat, Jakob Keller, Robin McMillan, Roger Suter
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Publication number: 20010010897Abstract: A gas burner with multiple gas rings comprising: a burner body (6) mountable underneath a top plate, with a cut-out section, of an appliance and incorporating a first, upwardly directed gas injector (14) and a second gas injector (9) followed by a horizontal tubular Venturi (10) opening into a vertical well (12); an outer burner head (3) seated on the body (6) through the cut-out section and spaced at a distance above the plate and provided with an annular chamber (22) open above the well (12) and having one or two rows of orifices for flames (4,5); and an inner burner head (1) shaped so as to have a radial divergent (37) coaxially supplied by the first injector through a recess located at the center (31) of the head (3), ports being provided in the head (3) so that all the primary air and the secondary air needed to operate the multiple burner arrives from the top of the top plate of the appliance.Type: ApplicationFiled: January 26, 2001Publication date: August 2, 2001Inventor: Bernard Dane
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Patent number: 6244860Abstract: In an apparatus for producing perlite granules, having an expansion tube and one or more burners arranged at one end of the expansion tube, the combustion air is blown into the flame through one or more combustion air nozzles. An additional subsonic nozzle is arranged in at least one combustion air nozzle. In a process for expanding raw perlite in the updraft from a flame, with the introduction of oxygen or oxygen-enriched air into this flame, the oxygen or oxygen-enriched air is introduced axially into the flame through subsonic nozzles.Type: GrantFiled: November 24, 1999Date of Patent: June 12, 2001Assignee: Messer Griesheim GmbHInventors: Gerhard Gross, Willi Baum
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Patent number: 6237510Abstract: A combustion burner includes a mixture nozzle (2) defining a mixture fluid passage through which a mixture fluid (1) containing pulverized coal and conveyor gas flows toward a furnace, secondary and tertiary air passages surrounding the mixture nozzle (2), through which secondary air (6) and tertiary air (9) for combustion purposes flow, respectively; and air injection nozzles (24) provided in the vicinity of an outer periphery of a distal end of the mixture nozzle (2). The air (21) is injected from the air injection nozzles (24) toward the axis of the mixture nozzle, so that the high-temperature gas in the vicinity of the outer periphery of the distal end of the mixture nozzle (2) is drawn into the mixture fluid (1) in the vicinity of the outer periphery of this distal end.Type: GrantFiled: March 19, 1998Date of Patent: May 29, 2001Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Toshikazu Tsumura, Kenji Kiyama, Tadashi Jimbo, Shigeki Morita, Koji Kuramashi, Kunio Okiura, Shinichiro Nomura, Miki Mori, Noriyuki Ohyatsu, Noboru Takarayama, Toshihiko Mine, Hironobu Kobayashi, Hirofumi Okazaki
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Patent number: 6230635Abstract: A fuel selected from powder fuels and liquid fuel is ejected through a fuel ejection pipe having an annular ejection opening; primary air is ejected through primary air-ejecting openings arranged on outer and inner sides of the fuel ejection, to form outer and inner primary air-ejection straight streams between which the fuel ejection stream is interposed, and to burn the fuel ejection stream. When a powder fuel is used, optionally, a liquid fuel is further ejected and mixed with the above-mentioned primary air streams, and the liquid and powder fuels are burnt together.Type: GrantFiled: August 21, 1998Date of Patent: May 15, 2001Assignee: Sumitomo Osaka Cement Co. Ltd.Inventors: Katsuji Mukai, Yoshihiko Sumitani, Toshiyuki Ishinohachi
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Patent number: 6189320Abstract: A burner, in particular for a gas turbine, in which combustion air is subjected to a vorticity by a vortex element, admits fuel to the vortical combustion air. At the same time, a pressure loss produced by the vortex element is small. A low NOx emission at virtually the same efficiency is achieved.Type: GrantFiled: June 21, 1999Date of Patent: February 20, 2001Assignee: Siemens AktiengesellschaftInventors: Gerwig Poeschl, Stefan Hoffmann, Ingo Ganzmann
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Patent number: 6186775Abstract: In a burner for operating a combustion chamber, which burner essentially comprises a swirl generator (100), a transition piece (200) arranged downstream of the swirl generator, and a mixing tube (20), transition piece (200) and mixing tube (20) forming the mixing section of the burner and being arranged upstream of a combustion space (30). A pilot-burner system (300) is arranged in the lower region of the mixing tube (20), which pilot-burner system (300), at minimized pollutant emissions, stabilizes the flame front, in particular in the transient load ranges. At least one ignition device (311) is integrated in the pilot-burner system (300).Type: GrantFiled: January 22, 1999Date of Patent: February 13, 2001Assignee: ABB Research Ltd.Inventors: Peter Jansohn, Dieter Köster, Thomas Ruck
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Patent number: 6152726Abstract: A burner for operating a heat generator includes a rotation generator (100) for a combustion air stream (115), a device for injecting at least one fuel (112, 116) into the combustion air stream, a number of transition channels (201) for transferring a flow formed in the rotation generator into a mixing pipe (20) located downstream from these transition channels, and a pilot burner system (300) in the lower part of the mixing pipe (20), in which the pilot burner system (300) is in active connection with rotation generators (400) located at the end side of the mixing pipe (20). The interaction between the pilot burner system and rotation generators ensures maximized flame stability in the combustion chamber (30), and a general minimization of pollutant emissions, while increasing the load range for lower pollutants towards smaller loads.Type: GrantFiled: October 14, 1999Date of Patent: November 28, 2000Assignee: Asea Brown Boveri AGInventors: Thomas Ruck, Hans-Peter Knopfel
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Patent number: 6132205Abstract: This invention incorporates a multi-ring burner assembly utilizing at least two flame rings to gently and evenly warm food and a third flame ring in conjunction with the first two flame rings for cooking food.This design has the further advantages of easy replacement of both the igniters and the gas jets from the top of the appliance without having to remove the unit from the appliance.Type: GrantFiled: January 6, 2000Date of Patent: October 17, 2000Inventor: Uwe Harneit
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Patent number: 6116171Abstract: A pulverized coal combustion burner has a circumferential distribution of pulverized coal density at an outlet portion of a pulverized coal nozzle made uniform, and a complete NO.sub.x decrease is attained. An oil gun (01) for stabilizing combustion is provided at a center portion. An annular sectional oil primary air flow path (02) surrounds the oil gun (01), and an annular sectional pulverized coal and primary air mixture flow path (14) surrounds the oil primary air flow path (02). Around the mixture flow path (14) is an annular sectional secondary air flow path (15), and an annular sectional tertiary air flow path (16) surrounds the secondary air flow path (15). A pulverized coal supply pipe is connected in the tangential direction to the mixture flow path (14). Further, an entering angle control (28) of the mixture is provided within the pulverized coal supply pipe (11). Within the mixture flow path (14), a pulverized coal density dividing cylinder (25) is provided.Type: GrantFiled: November 9, 1995Date of Patent: September 12, 2000Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hideaki Oota, Toshimitsu Ichinose, Masaharu Ooguri, Hitoji Yamada
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Patent number: 6109038Abstract: A combustor for a gas turbine having first and second passages for pre-mixing primary fuel and air supplied to a primary combustion zone. The flow of fuel to the first and second pre-mixing passages is separately regulated using a single annular fuel distribution ring having first and second row of fuel discharge ports. The interior portion of the fuel distribution ring is divided by a baffle into first and second fuel distribution manifolds and is located upstream of the inlets to the two pre-mixing passages. The annular fuel distribution ring is supplied with fuel by an annular fuel supply manifold, the interior portion of which is divided by a baffle into first and second fuel supply manifolds. A first flow of fuel is regulated by a first control valve and directed to the first fuel supply manifold, from which the fuel is distributed to first fuel supply tubes that direct it to the first fuel distribution manifold.Type: GrantFiled: January 21, 1998Date of Patent: August 29, 2000Assignee: Siemens Westinghouse Power CorporationInventors: Mehran Sharifi, Wendel Zolyomi, Graydon Lane Whidden