Flame Holder Having Protective Flame Enclosing Or Flame Stabilizing Structure Patents (Class 431/350)
  • Patent number: 6371754
    Abstract: A gas burner assembly for connection to a gas source includes a burner body having a sidewall and a main gas conduit. The burner body further includes a number of primary burner ports disposed within the sidewall, each for supporting a respective main flame. Additionally, a main fuel chamber is disposed within the burner body to provide fuel to the primary burner ports. A burner cap is disposed atop said sidewall. A stability channel is disposed within an outer portion of the burner cap. The stability channel is positioned adjacent the primary burner ports to capture a supply of gas and hot products from the burner assembly to re-ignite the primary burner ports after flameout. This configuration creates a repository of fuel and combustion products during normal burner operation within the stability channel for re-igniting the primary burner ports after flameout, thereby reducing the sensitivity of the burner assembly to pressure disturbances, while allowing a symmetric appearance to be maintained.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: April 16, 2002
    Assignee: General Electric Company
    Inventor: Joel Meier Haynes
  • Patent number: 6364657
    Abstract: A gas burner is disclosed. The gas burner includes a burner body including a pair of adjoining metal stampings that form a serially connected gas supply passage, venturi region, and plenum chamber, the gas supply passage defining at least one air supply hole for introducing air into the gas supply passage. A burner port is defined by integrally formed recesses in each adjoining metal stamping, the burner port being in fluid communication with the plenum chamber and being oriented about 90 degrees with respect to the central axis of the burner. The gas burner is fabricated from a pair of adjoining sheet metal halves. An alternate gas burner includes a tapered burner port which provides a more uniform flame height because it compensates for velocity variations in the flowing air fuel mixture. A divider plate is also included in the port which improves flame stability.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: April 2, 2002
    Assignee: Beckett Gas, Inc.
    Inventor: Michael J. O'Donnell
  • Patent number: 6334770
    Abstract: A fluid-fuel burner of the type producing a flame with axial development, which includes a combustion tile, having a broad shape, provided with an oxidizer and fuel injection orifices. These are approximately parallel to the major axis of symmetry of the tile, the internal shape of the latter as well as the orientation of the fuel and oxidizer injection orifices being chosen so as to create a difference in the distribution of the combustion products and of the recycled flue gases. A spread out flame is produced which ensures homogeneous distribution of the heat flux.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: January 1, 2002
    Assignee: Stein Heurtey
    Inventors: Patrick Giraud, Jean-Claude Montgermont, Fran├žois Pahmer
  • Patent number: 6331109
    Abstract: A premix burner consisting essentially of a swirl generator for a combustion air stream or another gaseous oxidizing medium and of conduits for injecting fuel into the swirl flow thus generated. As a result of a discontinuous cross-sectional widening at the transition to the combustion space, the swirl flow bursts open and a backflow bubble is formed, which serves for flame stabilization. For use under extreme thermal conditions, the burner front is provided with a heat shield which is fastened to a carrier structure in such a way as to allow, as unimpeded as possible, differential thermal expansions. The carrier structure is preferably provided with orifices, through which cooling air for the impact cooling of the heat shield flows. In a preferred variant, the fuel gas supply is designed as pipes which are led through orifices of the swirl generator without any fixed connection. As a result of this design, thermal stresses in the material of the burner are avoided as far as possible.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: December 18, 2001
    Assignee: Alstom (Switzerland) Ltd.
    Inventors: Bettina Paikert, Christian Steinbach, Richard Straessle, Dieter Winkler
  • Publication number: 20010049077
    Abstract: An air heating burner having improved CO emissions across a broad range of heat inputs. The burner incorporates wings which cover portions of mixing plates associated with low to medium-low fire. The wings reduce air flow velocity to eliminate quenching during such conditions, thereby increasing combustion temperature and reducing CO emissions. The wings also form pre-heat chambers which further increase combustion temperature. The burner produces a substantially consistent level of CO emissions across the range of inputs, regardless of the pressure drop across the burner.
    Type: Application
    Filed: August 9, 2001
    Publication date: December 6, 2001
    Applicant: Eclipse, Inc.
    Inventors: Matvey Fayerman, Ad de Pijper, David Collier
  • Publication number: 20010049079
    Abstract: A powered multi-fuel burner has a burner assembly which utilizes an air aspirated nozzle and an infra-red type configuration. An air compressor provides air to the air aspirated nozzle and a fuel tank holds fuel supplied to the air aspirated nozzle by operation of the suction created at the nozzle. A metering valve is interposed between the fuel tank and the air aspirated nozzle. The metering valve is manually adjustable to increase or decrease the fuel supplied to the nozzle thereby to increase or decrease the heat output of the burner.
    Type: Application
    Filed: May 5, 1997
    Publication date: December 6, 2001
    Inventors: EDGAR C. ROBINSON, LEONARD FLEMING
  • Publication number: 20010041316
    Abstract: Increased turndown ratio is achieved by providing an atmospheric gas burner having a burner body with a plurality of ports formed therein and a fuel flow divider disposed in the burner body. The fuel flow divider defines a primary fuel chamber and at least one secondary fuel chamber, wherein the secondary fuel chamber is in fluid communication with at least one of the ports and the primary fuel chamber is in fluid communication with the remaining ports. A first mixing tube introduces a fuel-air mixture into the primary fuel chamber, and a second mixing tube introduces a fuel-air mixture into the secondary fuel chamber.
    Type: Application
    Filed: July 12, 2001
    Publication date: November 15, 2001
    Inventors: Joel Meier Haynes, Victor Caloca, Jeronimo Ramirez
  • Patent number: 6305927
    Abstract: In a burner (14) with at least one fuel supply system (15, 16) through which the burner (14) is fed a fuel flow (12), and the fuel fed is injected via fuel nozzles and subsequently burned in a combustion chamber (11), the formation and amplification of pressure fluctuations in the combustion chamber is prevented in a simple way in terms of design by virtue of the fact that means (17) are provided which prevent periodic pressure fluctuations which occur in the combustion chamber from leading to fluctuations in the fuel flow (12) in the fuel supply system (15, 16).
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: October 23, 2001
    Assignee: ABB Alstom Power (Schweiz) AG
    Inventor: Jakob J. Keller
  • Publication number: 20010026911
    Abstract: An apparatus is provided including a furnace structure defining a reaction chamber in which oxidant and fuel are reacted to form combustion products and having an anchor surface having an opening through which the oxidant and fuel are introduced into the reaction chamber. The reaction chamber is configured to recirculate the combustion products back toward the anchor surface. The apparatus also includes an anchor outlet configured to create a layer of combustion products directed along the anchor surface under the influence of the recirculated combustion products. The apparatus further includes a primary outlet configured to direct primary fuel to flow into the reaction chamber through the opening and the layer of combustion products so as to ignite the primary fuel.
    Type: Application
    Filed: January 5, 2001
    Publication date: October 4, 2001
    Inventors: Thomas B. Neville, Thomas F. Robertson, Brian J. Schmotzer
  • Publication number: 20010019815
    Abstract: In a method and an appliance for operating a burner (19), in which a flow of combustion air (10) transports fuel into a combustion chamber (21) where the fuel is burnt and, during transport, the flow of combustion air (10) is mixed with the fuel and guided by casing elements (13, 16), the resonant build-up interaction of coherent flow instabilities and acoustic field is reduced because the formation of first periodic, coherent flow instabilities in a boundary layer between the combustion air (10) and the casing elements (13, 16) is perturbed, and coupling of an acoustic field in the combustion chamber (21) to such first flow instabilities is reduced.
    Type: Application
    Filed: November 1, 1999
    Publication date: September 6, 2001
    Inventor: JAKOB KELLER
  • Patent number: 6276926
    Abstract: An injector for water free of external torch external torch gas injector comprising an outer tube, a first inner tube and a second inner tube. The outer tube has a side tube and a plurality of outer tube emission holes. The outer wall of the outer tube joins with a ball-and-socket joint. The plurality of outer tube emission holes is at the front end of the outer tube. The outer tube encloses the first inner tube. The first inner tube has a side tube and an inner tube emission hole. The inner tube emission hole is also at the front end of the outer tube. The outer tube also encloses the second inner tube. The second inner tube has an inner tube inlet and an inner tube emission hole. The second inner tube inlet is at the back end of the outer tube. The second inner tube emission hole is on the wall of the outer tube, near the largest cross-section of the ball-and-socket joint.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: August 21, 2001
    Assignee: United Microelectronics Corp.
    Inventors: Tony Chen, I-Ho Huang
  • Publication number: 20010012603
    Abstract: The technical field of the invention is that of making “in-stream” burners which are placed directly inside a duct carrying a flow of gas, with the burners serving to heat the gas and being placed as burner rails that are generally made up of individual blocks. Such burners comprising a pipe on an axis XX′ and suitable for extending transversely across the flow direction of said gas, the pipe being fed with a fuel gas and being pierced by at least two holes in alignment on a common generator line, the burner also having a flame stabilizer formed by two deflector-forming fins diverging on either side of said generator line. According to the invention, at least one of said holes is extended by a tube extending beyond the outer edges of the fins and pierced by at least one fuel gas ejection orifice at its distal end.
    Type: Application
    Filed: February 2, 2001
    Publication date: August 9, 2001
    Inventor: Frederic Bury
  • Publication number: 20010010896
    Abstract: Provision of a low-NOx burner allowed to further reduce NOx only by structural design of the burner in comparison with prior art. The low-NOx burner comprises a main nozzle 13 for injecting a premixture formed by mixing fuel and an oxidizer, and a secondary flame-holding nozzle 12A for making a premixture or an oxidizer impinge on the premixture injected from the main nozzle 13, in a direction at an approximately right angle to the injection direction of the main nozzle 13.
    Type: Application
    Filed: December 20, 2000
    Publication date: August 2, 2001
    Applicant: TOKYO GAS CO., LTD
    Inventors: Satoshi Nagayama, Shin Shizukuishi
  • Patent number: 6261089
    Abstract: The burner is a fuel gas burner with low NOx content emissions, of the type having one or more units (1), provided with slits in whose correspondence the combustion develops, each of said units being fed the mixture composed by fuel gas and comburent air through a Venturi tube (2). The main characteristic of the burner object of the present invention lies in that a fan (6) is included that can supply in a continuous manner during the running of the burner, an air volume in the range 1-30% the air volume required as a whole by combustion.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: July 17, 2001
    Assignee: Industrie Polidoro A. SpA
    Inventor: Polidoro Aldo
  • Publication number: 20010007737
    Abstract: In a combustion process, especially one used for melting glass, the delivery of fuel is ensured by an apparatus having at least one burner (5) which is equipped with at least one injector (1) that includes a liquid fuel delivery tube (2) which has at least one internal wall (25) and an injected fluid delivery tube (3) arranged concentrically with respect to the liquid fuel delivery tube. Immediately before injecting the liquid fuel from its delivery tube, one puts it in the shape of a hollow jet basically assuming the shape of the internal wall. This has application for the reduction of NOx in a glass-making oven.
    Type: Application
    Filed: February 13, 2001
    Publication date: July 12, 2001
    Applicant: SAINT-GOBAIN VITRAGE
    Inventors: Guy Tackels, Patrick Rouchy, Joseph Vernaz
  • Patent number: 6244854
    Abstract: This invention relates to a burner and a method of combustion for producing a flame jet sheet or sheets for various applications in industrial furnaces. The burner has at least one linear or curvilinear flame nozzle having a ratio of width to height of greater than unity in order to produce high velocity and high temperature flame jet sheet or sheets with a well defined geometry. The burner is capable of being scaled to various sizes for various industrial furnace applications due to its geometry.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: June 12, 2001
    Assignee: The BOC Group, Inc.
    Inventors: Donald Prentice Satchell, Jr., Christian Juan Feldermann
  • Patent number: 6244853
    Abstract: A soldering iron (1) comprises a soldering head (4) connected to a handle (2). A cylindrical catalytic element (20) located in a combustion chamber (8) converts gas to heat for heating a soldering tip (15). An electrode (40) located within the catalytic element (20) initially ignites a fuel gas/air mixture to burn in a flame (42) within the catalytic element (20) for raising the temperature of a downstream portion (50) of the catalytic element (20) to its ignition temperature. Heat from the downstream portion (50) raises an upstream portion (51) of the catalytic element (20) upstream of the flame (42) to its ignition temperature, which then commences to convert the fuel gas/air mixture to heat. This starves the flame (42) of fuel gas/air mixture, thus extinguishing the flame (42) so that the catalytic element (20) continues to convert fuel gas/air mixture to heat in a catalytic reaction.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: June 12, 2001
    Assignee: Oglesby & Butler Research & Development Limited
    Inventors: Alfred P Oglesby, John P Oglesby
  • Patent number: 6234785
    Abstract: Swirler plate in a gas burner, the swirler plate having a plurality of slits formed in a radial direction for supplying a mixed gas to a combustion chamber, and a plurality of swirl vanes formed on one side of the slits for guiding the mixed gas from the slits to the combustion chamber, including a swirl vane for a flame detector having an angle of a slope formed lower than angles of slopes of other swirl vanes, the swirl vane for a flame detector having a combustion main reaction region in which the flame detector is fitted.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: May 22, 2001
    Assignee: LG Electronics, Inc.
    Inventors: In Kyu Kim, Young Soo Kim, Yang Ho Kim, Kyeong Su Kim
  • Patent number: 6206684
    Abstract: A system and method is provided in the form of an injector assembly 10 for thoroughly premixing fuel and oxidizer reactants and water upstream of a combustion chamber 12. The assembly includes a housing 20 that has a first stack 30 for thoroughly mixing reactants from an oxidizer source 40 and a fuel source 50. It also includes a second stack 80 for mixing and blending the prior mixed reactants with coolant water, before ignition within a combustion chamber 12. The mixing and blending is accomplished in mixing cups 100 where the water and reactant mixture are joined in perpendicular flow streams. Some water is also introduced tangentially in the mixing cups to promote vortical flow and further enhance the mixing process. An alternative injector assembly 210 is also provided that mixes the reactants in a swirl cup 260 and enhances mixture ratio uniformity by means of a diffusion plate insert 270.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: March 27, 2001
    Assignee: Clean Energy Systems, Inc.
    Inventor: H. Harry Mueggenburg
  • Patent number: 6196835
    Abstract: A burner for generating a hot gas including at least two hollow partial bodies stacked inside each other in a downstream air flow direction. The center axes of the hollow bodies extend offset to each other such that burner slits formed by adjoining walls of the partial bodies form tangential air inlet channels for an inflow of combustion air into an inside chamber defined by the partial bodies. The hollow bodies are provided with a plurality of baffles projecting into the downstream air flow. The plurality of baffles add an axial turbulence force to the air flow.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: March 6, 2001
    Assignee: ABB Research Ltd.
    Inventors: Ephraim Gutmark, Christian Oliver Paschereit, Wolfgang Weisenstein
  • Patent number: 6162049
    Abstract: A ported, premixed extendable burner provides increased turndown capability relative to conventional burners. The burner has an adjustable flameholder sleeve which can be extended and retracted relative to a flameholder, to increase and decrease the available flameholder area. The burner is suitable for use in modulated heating applications and other applications where high turndown ratios are desired.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: December 19, 2000
    Assignee: Gas Research Institute
    Inventors: Roberto O. Pellizzari, Johannes H. J. Thijssen, Scott Macadam
  • Patent number: 6155821
    Abstract: A burner assembly for a multi-fuel stove includes a nozzle that is vertically oriented during operation of the stove wherein the nozzle is connected to a number of flanges that extend along and in directions away from the nozzle and have upper portions extending up to a level that is above the nozzle and have channels formed between them for the passage of gas. By this arrangement, different fuels including petrol to photogen and even fuels with higher vaporization temperatures can be effectively vaporized and burned.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: December 5, 2000
    Assignee: Optimus International AB
    Inventor: Mads Hellum
  • Patent number: 6155820
    Abstract: In a burner for operating a heat generator, 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) form the mixing section of the burner, this mixing section being arranged upstream of a combustion space (30). In the region of the tangential combustion-air-directing inflow ducts (101b-104b), fuel-directing ducts (121-124), the cross section of flow of which is designed for a low-calorific fuel (116), extend along the swirl generator (100). The fuel-directing ducts (121-124) end at a distance upstream of the transition of the tangential inflow ducts (101b-104b) into an interior space of the swirl generator (100), whereby partial mixing between the two media (115, 117) takes place before the mixture flows into the interior space (118). In addition, this setting-back provides sufficient space for other fuel-directing lines (111-114) in this region.
    Type: Grant
    Filed: November 17, 1998
    Date of Patent: December 5, 2000
    Assignee: ABB Research Ltd.
    Inventors: Klaus Dobbeling, Hans Peter Knopfel, Thomas Ruck
  • Patent number: 6131561
    Abstract: A gas range has a plurality of burners each of which extend through a respective burner opening in a range top of the gas range. A gap is formed between each burner assembly and its respective opening. Each burner assembly includes a burner head which includes an annular air stability ring which extends into the gap between the burner assembly and the range top. The air stability ring deflects flue products escaping through this gap away from the burner ports. By deflecting the flue products away from the burner ports, the flame eminating from the burner ports is stabilized permitting more efficient combustion of the gas.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: October 17, 2000
    Assignees: Lincoln Brass Works, Inc., Frigidaire Home Products
    Inventors: Douglas Myron Maxwell, James Lewis Ayres, Joseph A. Donoho, Bobby R. Goodman, Wiley William Miller
  • Patent number: 6132202
    Abstract: The object of the invention is to provide a method and a device for operating a premix burner which improve the supply of fuel under certain types of operation.According to the invention, this is achieved by the fact that the liquid fuel (2) and the water (27) are conveyed separately to the liquid-fuel nozzle (17), and only there a liquid-fuel/water mixture (28) is produced, which is then injected into the inner chamber (9) of the premix burner (4) in a plain jet (29) with an injection angle a of less than 10.degree.. To this end and, the liquid-fuel nozzle (17), which opens out centrally into the inner chamber (9), is designed with a simple injection opening (19). A mixing zone (22), into which a liquid-fuel line (20) and a water feed line (21) open out, is arranged upstream of the injection opening (19).
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: October 17, 2000
    Assignee: Asea Brown Boveri AG
    Inventors: Adnan Eroglu, Robin McMillan, Jens Policke
  • Patent number: 6126439
    Abstract: In a premix burner, the swirl-stabilized interior space (18) has a conical inner body (13) running in the direction of flow. The outer casing of the interior space (18) is pierced by tangentially arranged air-inlet ducts (11a, 12a) through which a combustion-air flow (16) flows into the interior space (18). The swirl flow (23) forming in the interior space (18) is enriched with a fuel via at least one fuel lance (17). The mixture of the two media is then formed in the downstream mixing tube (21). The mixing tube (21) then merges into a combustion space (31) via a jump in cross section, a backflow zone (32) forming in the region of the plane of the jump in cross section, which backflow zone (32) ensures the stability of the combustion.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: October 3, 2000
    Assignee: ABB Alstom Power (Switzerland) Ltd
    Inventors: Hans Peter Knopfel, Giacomo Bolis
  • Patent number: 6123543
    Abstract: Flame outlet rail for a gas burner of the atmospheric, pre-mix type. The rail includes a shell defining a plenum closed at one end and open at another end to receive an air/fuel mixture and having a length between the ends. The shell has a longitudinal orifice extending along the length of the shell. A grid made of sheet metal pierced by a series of rectangular slits is positioned over the longitudinal orifice of the shell and communicates an interior of the shell with the exterior thereof to permit the air/fuel mixture to flow therethrough so as to form a flame front upon ignition. The grid has a longitudinal axis in parallel with the longitudinal orifice and a length. The slits which extend perpendicular to the longitudinal axis, are distributed on either side of the longitudinal axis and form a sinusoid extending over the entire length of the grid, which increases a length of the flame front. The slits (2) are spaced apart by a distance, e, constant along the longitudinal axis (3) of the flame outlet grid.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: September 26, 2000
    Assignee: Sauniter Duval Eau Chaude Chauffage SDECC
    Inventors: Lila Menari, Stephen Daemon Andrews
  • Patent number: 6106276
    Abstract: A gas burner is provided for use on the inlet end of a fire tube, and includes a mixer having attached to it a gas delivery pipe, fuel gas and air being combined in the mixer to provide mixed gas and air. A venturi is secured at its inlet end to the mixer to receive the flow of gas and air, the venturi serving to draw air into the mixer. A burner nozzle is affixed to the venturi outlet end and the burner nozzle and extends within the fire tube. A perforated tube surrounds the mixer/venturi and at least a portion of the burner nozzle. A sound absorbing flame cell housing surrounds the perforated tube. A flame arrestor closes an air inlet opening in the flame cell housing air and serves to permit air to pass into the flame cell housing but prohibits the passage of flame therethrough so that flame is confined within the interior of the flame cell housing.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: August 22, 2000
    Assignee: National Tank Company
    Inventors: Gary W. Sams, Merle B. Inman
  • Patent number: 6102692
    Abstract: In a burner for a heat generator, having a swirl generator (100) arranged upstream of the combustion zone (30), fuel injection is connected with the combustion air (115), swirled in the swirl generator, in such a way that the injection angle of the fuel jet (105) belonging to the fuel nozzle (104) corresponds approximately to the setting angle of the sectional bodies forming the swirl generator relative to the axis (60) of the burner.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: August 15, 2000
    Assignee: ABB Alstom Power (Switzerland) Ltd
    Inventors: Klaus Dobbeling, Christian Steinbach, Thomas Ruck
  • Patent number: 6092518
    Abstract: The invention concerns a cooking appliance comprising devices for cooking of which at least one burner with spiralling flames. The ducts for delivering the fuel mix towards the external part of the burner with spiralling flames are inclined with respect to a peripheral line on which the flame outlets are distributed. The invention is useful for high-powered gas burners for cooking food.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: July 25, 2000
    Assignee: Sourdillon
    Inventor: Bernard Dane
  • Patent number: 6074200
    Abstract: A pilot burner apparatus for use with gas-fired appliances, such as gas-fired water heaters, is provided with a structure configured for the early detection, and response to, the presence of flammable vapor in the atmosphere ambient to the appliance. Combustion air for the pilot burner is taken from that region of the ambient atmosphere, most likely to become contaminated with flammable vapor first. One or more flame characteristics of the pilot burner flame are monitored, and if the flame characteristics depart from a predetermined range of parameters, gas flow to the pilot and main burner(s) of the appliance are cut off. The sensitivity of the pilot burner is such that flammable vapors are detected before the concentration of flammable vapors car rise to the lower flammability limit of the anticipated flammable vapor(s).
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: June 13, 2000
    Assignee: Gas Research Institute
    Inventors: John A. Bowman, Karen R. Benedek, Stephan E. Schmidt
  • Patent number: 6071115
    Abstract: A process and apparatus for combusting fuel which results in reduction of nitrogen oxides and carbon monoxides emissions. Fuel and primary air are preferably premixed and introduced into a combustion chamber. Secondary air is introduced through a plurality of secondary air ports, each preferably shaped as a slot, which are positioned about a venturi nozzle or flame holder disk mounted with respect to a combustion chamber wall. The secondary air flowing through the secondary air ports forms relatively high velocity and momentum secondary air jets that promote rapid mixing of the fuel and primary air mixture into the secondary air flow, such that a combustion flame is established at a partial periphery of the secondary air jets.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: June 6, 2000
    Assignee: Gas Research Institute
    Inventors: Philip C. Carbone, Karen R. Benedek, Stephan E. Schmidt, Charles E. Benson
  • Patent number: 6065957
    Abstract: According to the present invention, a catalyst combustion apparatus includes a ring-shaped catalyst body for catalytically burning the mixture of the fuel and the air, which is disposed in a combustion cylinder. In the combustion cylinder, a fuel nozzle and an inlet for the air are disposed at one end side of the catalyst body, and the premixing chamber is formed at the other end side. The fuel and the air are supplied from one end side of the catalyst body through a through-hole formed at a center portion of the catalyst body and is mixed in the premixing chamber. In the premixing chamber, a flow direction of the mixture is turned toward the catalyst body. A part of the exhaust gas is introduced into the air at one end side. In this way, it is possible to simplify and downsize the combustion apparatus, while securing the preheating effect of the air by the circulation of the exhaust gas.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: May 23, 2000
    Assignee: Denso Corporation
    Inventors: Yasuo Kondo, Shinichi Mashimo, Akio Matsuoka, Masanori Uehara
  • Patent number: 6062849
    Abstract: This invention concerns a combustible gas atmospheric burner of the so-called "small-ramp type", comprising at least a body (1) consisting of two half-shells in a vertical plane of symmetry, configured in the lower part as a venturi tube (4), wherein the mixture of combustible gas and air is introduce by way of a nozzle (18). In its upper part it has a head made of high-temperature resisting material where the combustion takes place. The upper part of the burner body has portions of different cross-section so that the mixture exits from the said head in such a manner that its output is essentially uniform and of a laminar nature along the entire longitudinal dimension, which gives rise to a reduction in the noise emitted by the burner, as compared with similar arrangements of a known type.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: May 16, 2000
    Assignee: Industrie Polidoro A. S.p.A.
    Inventor: Aldo Polidoro
  • Patent number: 6059566
    Abstract: A burner apparatus is provided in accordance with the present invention that includes a case coupled to an air supply and a nozzle positioned to lie in case and coupled to a fuel supply. Nozzle defines at least one air-flow cavity inside case. Nozzle is formed to include a fuel-distribution chamber and at least one fuel-discharge port to communicate fuel from fuel-distribution chamber into air passing from air supply through each air-flow cavity. Fuel) mixes with air in each air-flow cavity to produce a combustible air-and-fuel mixture therein which can be ignited to produce a flame in case.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: May 9, 2000
    Assignee: Maxon Corporation
    Inventor: William G. Cummings, III
  • Patent number: 6059565
    Abstract: A burner for operating a heat generator, the burner including a swirl generator for a combustion-air flow and a mechanism for injecting at least one fuel into the combustion-air flow, a mixing section arranged downstream of the swirl generator and having a number of transition passages for passing a flow formed in the swirl generator into a mixing tube arranged downstream of the transition passages. The combustion-air flow into the swirl generator flows against turbulence generators, which are located upstream of the injection of the fuel into the combustion-air flow, and the turbulence generators include individual bars set transversely to the combustion-air flow.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: May 9, 2000
    Assignee: ABB Alstom Power (Switzereland) Ltd
    Inventors: Hans Peter Knopfel, Thomas Ruck
  • Patent number: 6056538
    Abstract: An apparatus is provided for suppressing flame/pressure pulsations in a furnace, in which a flame is surrounded by a gas shroud stream having a higher flow speed, whereby a ring vortex formation is stopped. In order for this gas shroud stream to be able to achieve smaller gas volumes, a screen is provided that surrounds the gas outlet openings and runs at a spacing around the burner, so that a flue gas recirculation area associated with the combustion chamber is separated from the outlet location of the gas shroud stream and thus the gas shroud stream itself.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: May 2, 2000
    Assignees: DVGW Deutscher Verein des Gas-und Wasserfaches-Technisch-Wissenschaftlich e Vereinigung, Horst Buchner, Wolfgang Leuckel
    Inventors: Horst Buchner, Wolfgang Leuckel
  • Patent number: 6050809
    Abstract: An immersion tube burner having stable ignition and flame over a wide range of firing rates. The burner includes a restriction orifice located between the fan and the burner nozzle for minimizing pulsations of air pressure fluctuations between the fan and nozzle. The orifice is sized so that the air velocity is greater through the orifice than at the nozzle so that any such pulsations are directed downstream of the nozzle rather than upstream, where they can affect the flame. The burner includes a burner nozzle having a cone shaped mixing plate. The angled shape of the plate re-circulates hot gases towards the base of the flame to thereby ensure more consistent ignition and combustion. The mixing plate further has holes arranged in primary and secondary zones. The holes of the primary zone are located within approximately five times the diameter of the fuel outlet ports so that the fuel exiting such ports has sufficient velocity to optimize mixing.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: April 18, 2000
    Assignee: Eclipse Combustion, Inc.
    Inventor: Matvey Fayerman
  • Patent number: 6027336
    Abstract: A gas burner for a heating furnace with at least one burner pipe (1) with flame openings (7). An intake opening (5) is provided in which primary air enters and wherein burnable gas enters through a gas nozzle (4) penetrating into the intake opening (5). The percentage of primary air remains extensively unaffected during changes in the gas pressure occurring as a consequence of a change in the nature of the gas.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: February 22, 2000
    Assignee: Stiebel Eltron GmbH & Co. KG
    Inventors: Hubert Nolte, Roland Merker, Martin Herrs, Rolf Naumann
  • Patent number: 6027332
    Abstract: The invention describes a nozzle and a burner for oil-well tests comprising a plurality of nozzles. The nozzle comprises means for injecting an air-oil mixture to be burnt in the direction of a combustion zone, the flow of air at the outlet of the nozzle allowing the air in the air-oil mixture to create an air induction effect, that is to say entrainment of air, which is sufficient along the whole length of the jet to ensure the combustion.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: February 22, 2000
    Assignee: Schlumberger Technology Corporation
    Inventors: Bernard Glotin, Patrick Flament, Gerard Martin
  • Patent number: 6027334
    Abstract: In an evaporation burner with a combustion chamber (1) for a heater or the like with a peripheral boundary wall (29), a front boundary wall (6) and an air-supply nozzle (8) projecting coaxially into the combustion chamber (1) with radial air outlets (9) through the nozzle wall, a guiding device (32) for a whirling air supply is fitted at or upstream of the air supply nozzle (8) of the combustion chamber (1), in which said air supply nozzle has a diaphragm (10) for axial back-flow (R) of the exhaust gas or the air at the center of turbulence of the whirling air supply (L). In an axial extension of the combustion chamber may be fitted a coaxial flame pipe (20), which together with the peripheral boundary wall (2), may constitute a one-piece (deep-drawn) sheet-metal component and the rest of the combustion chamber may be a cast component.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: February 22, 2000
    Assignee: J. Eberspacher GmbH & Co.
    Inventor: Walter Blaschke
  • Patent number: 6024083
    Abstract: A nozzle for a recuperative radiant tube burner system is constructed to provide uniform combustion along the length of the inner tube. The nozzle includes combustion air ports disposed at compound angles and having different axial components to provide staged mixing of air and fuel. The staged mixing produces a combustible mixture along the length of the tube to produce a more uniform flame. The nozzle further has an outer wall disposed normal to the combustion air ports to improve air flow through the ports. A fuel outlet tube has relief ports for continuing fuel flow in the event that a main orifice is plugged, which may result from air pressure fluctuations in the burner system.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: February 15, 2000
    Assignee: Eclipse Combustion, Inc.
    Inventor: Valeriy Smirnov
  • Patent number: 6019596
    Abstract: 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), there are means (302, 303, 304) in the lower region of the mixing tube (20) which bring about cooling of the base plate (305) forming a front wall. The air quantity (307) used here is passed into the flow (40) of the mixing tube (20). A leaner mixing and lower NOx emissions are thereby achieved.
    Type: Grant
    Filed: November 17, 1998
    Date of Patent: February 1, 2000
    Assignee: ABB Research Ltd.
    Inventors: Hans Peter Knopfel, Thomas Ruck
  • Patent number: 6007325
    Abstract: A gas fired burner is provided for use in applications such as chemical process furnaces for process heaters in refineries and chemical plants, and the like. The burner is provided with a plurality of fuel gas inlets for enabling manipulation of the flame shape and combustion characteristics of the burner, based upon variation in the distribution of fuel gas between the various fuel gas inlets.A combination pilot and flame holder for a burner, such as may be used in process heaters and furnaces for refineries, chemical plants and the like, is also provided. The pilot is mounted atop a supply pipe for premixed fuel and air, which is positioned in the bore of a burner quarl. The pilot includes a radially outwardly extending flange which is upstream of a surface combustion flame holder for establishing a radially directed surface combustion flame.The present invention also provides a low-emissions burner and pilot system for use in such process heaters and furnaces.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: December 28, 1999
    Assignee: Gas Research Institute
    Inventors: Peter J. Loftus, Charles E. Benson, Roberto O. Pellizzari, Richard R. Martin
  • Patent number: 6007328
    Abstract: A system for transferring heat to an impingement surface includes a first radial jet reattachment combustion nozzle operable to direct a flame toward the impingement surface and comprising a central longitudinal axis. The system also includes a second radial jet reattachment combustion nozzle operable to direct a flame toward the impingement surface and comprising a central longitudinal axis. The first and second nozzles are positioned such that the central longitudinal axes are substantially parallel and spaced apart such that flames directed from the first and second radial jet reattachment combustion nozzles interact with each other.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: December 28, 1999
    Assignee: The Texas A&M University System
    Inventors: Jamal Seyed Yagoobi, Robert H. Page
  • Patent number: 5997283
    Abstract: A cell arrangement for the electrolysis of water to liberate hydrogen and oxygen gases is described. A cell unit (125) has a stacked arrangement of segmentation disks (114), a first type of (anode) cell plates (90), a second type of (cathode) cell plates (98) and separation membranes (116). Interconnecting conductive shafts (126-131) pass through holes (100,102) of the cell plates (90,98) to have selective electrical interconnection therewith. Water and electrolyte is supplied by inlet ports (108,110) to immerse the cell plates (90,98). The membranes (116) normally isolate adjacent cathode and anode plates (90,98) from the mixing of liberated oxygen and hydrogen gases whilst allowing ionic current flow. By selective adjustment of the water/electrolyte pressure differential on respective sides of the separation membranes (116), admixture of the liberated gases can be produced. The liberated gases discharge by outlet ports (104,106).
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: December 7, 1999
    Assignee: Hydrogen Technology Ltd
    Inventor: Spiro Ross Spiros
  • Patent number: 5993196
    Abstract: A burner apparatus for burning petroleum products during well testing. The apparatus comprises a plurality of burner nozzles for mixing air, oil or other flammable hydrocarbon, and in some cases steam, and discharges the mixture for burning. Each module may have a plurality of burner nozzles, and a plurality of such modules may be connected together. Each burner nozzle has a body with an air inlet and a fluid inlet, a nozzle insert disposed in the body and having an air port in communication with the air inlet and a fluid port in communication with the fluid inlet. Sealing is provided between the nozzle insert and the body. The body may also have a steam inlet, and the nozzle insert may also have a steam port in communication with the steam inlet, for directing steam into the apparatus to increase the mixing energy and temperature, thereby facilitating atomization.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: November 30, 1999
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Timothy M. Young, Earl Ray Wade
  • Patent number: 5993197
    Abstract: A combustion chamber of a burner for a vehicle heater or for thermal regeneration of an exhaust gas particle filter having a frontal boundary wall, a circumferential boundary wall, a connector for fitting a glow plug and a connector for conveying combustion air which projects from the frontal boundary wall into the combustion chamber and has at least combustion air outlets through the connector wall, in which the combustion chamber with the frontal boundary wall, the circumferential boundary wall, the glow plug connector and with or without the air supply connector takes the form of a one-piece precision-cast component.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: November 30, 1999
    Assignee: J. Eberspacher GmbH & Co.
    Inventors: Andreas Alber, Walter Blaschke, Dirk Brenner, Michael Humburg, Wolfgang Pfister, Peter Steiner
  • Patent number: 5984665
    Abstract: A gas fired burner is provided for use in applications such as chemical process furnaces for process heaters in refineries and chemical plants, and the like. The burner is provided with a plurality of fuel gas inlets for enabling manipulation of the flame shape and combustion characteristics of the burner, based upon variation in the distribution of fuel gas between the various fuel gas inlets.A combination pilot and flame holder for a burner, such as may be used in process heaters and furnaces for refineries, chemical plants and the like, is also provided. The pilot is mounted atop a supply pipe for premixed fuel and air, which is positioned in the bore of a burner quarl. The pilot includes a radially outwardly extending flange which is upstream of a surface combustion flame holder for establishing a radially directed surface combustion flame.The present invention also provides a low-emissions burner and pilot system for use in such process heaters and furnaces.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: November 16, 1999
    Assignee: Gas Research Institute
    Inventors: Peter J. Loftus, Charles E. Benson, Roberto O. Pellizzari, Richard R. Martin
  • Patent number: 5984670
    Abstract: A burner for liquid and/or gaseous fuels (A, B, C) for a premixing combustion system in graduated load operation of a combustion chamber includes at least one inner partial body (2) that extends in the flow direction; at least one outer partial body (4) which extends conically opposite to the inner partial body (2); and at least one other surrounding pipe (8). The inner and outer partial bodies form a central flow structure, whereby the two are supplied with the flow in effective connection with each other with combustion air (13, 14, 15). The main part of this combustion air (13) then flows through the two partial bodies through air inlet slits (11, 12) and forms one rotational flow in each of the adjoining flow chamber (5, 7).
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: November 16, 1999
    Assignee: Asea Brown Boveri AG
    Inventors: Robin McMillan, Ennio Pasqualotto