Oxidizer Added To Region Of Incomplete Combustion Patents (Class 431/10)
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Patent number: 11598527Abstract: A method of reducing noise from a combustor of a gas turbine engine includes the steps of establishing a maximum noise limit that may be for a particular frequency range. A primary fuel flow percentage, which may be emitted from a fuel nozzle arrangement having various groupings of simplex and duplex nozzles, is then established. An immersion depth measured between an aft rim of a swirler and a distal tip of the fuel nozzles may then be reduced thereby reducing the noise amplitude.Type: GrantFiled: June 9, 2016Date of Patent: March 7, 2023Assignee: Raytheon Technologies CorporationInventors: Justin M. Locke, Dennis Moura, Duane McCormick, Scott A. Liljenberg, Theodore Strickland, William Proscia
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Patent number: 11161764Abstract: An end-fired melting furnace and a method of melting raw materials by an end-fired melting furnace are provided, where the furnace includes a melting tank, a melting chamber, first and second ports, at least one burner, and at least one auxiliary fuel injector arranged in the end-fired melting furnace in a roof or in first and second side walls so that the at least one auxiliary fuel injector introduces a fraction X2 of auxiliary fuel, in a direction of re-circulating combustion products, without additional oxidiser, into the re-circulating combustion products in a direction of a flow of the re-circulating combustion products, and with a chosen velocity such that the fraction X2 of auxiliary fuel mixes with the re-circulating combustion products before being combusted by oxidiser entering the furnace.Type: GrantFiled: January 17, 2020Date of Patent: November 2, 2021Assignee: ENGIEInventors: Neil Fricker, Richard Stanley Pont, Isabelle Alliat, Thierry Laplace, Thierry Bellin-Croyat
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Patent number: 11124430Abstract: A thin film, direct convection, evaporative apparatus, such as for treating waste water on-site at a production area or waste water processing area, relies on direct exposure of fluid to an open flame in a substantially enclosed burner unit having a burn chamber fed by an air-fuel mixing chamber and a fluid chamber, which apparatus also has gas and air trains and a metered fluid train permitting controlled fluid flow rate.Type: GrantFiled: July 19, 2019Date of Patent: September 21, 2021Assignee: AbTech Industries, Inc.Inventors: Shawn M Lolling, Jonathan C Warner
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Patent number: 11060721Abstract: The invention relates to a burner installable to a boiler for burning a premixed air-fuel mixture, said burner comprising a frame member provided with an elongated combustion head protruding from the frame member and having what in a view from the frame member is its distal end provided with a tip plate. In said burner between a side edge of the tip plate and the plane of the tip plate is an oblique angle of incidence for directing a gas delivered forward of the tip plate away from the longitudinal center axis of the combustion head, the combustion head has its tip plate provided with a plurality of air openings extending through the tip plate and it is for cooling the tip plate that the inner tube is additionally provided with a supply of combustion air for conveying the combustion air through the tip plate's air openings.Type: GrantFiled: March 19, 2019Date of Patent: July 13, 2021Assignee: Oilon Technology OyInventors: Joonas Kattelus, Lassi Karvonen, Michele Danelon
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Patent number: 11015804Abstract: The present invention is a system that utilizes high pressure gas (greater than ½ psig) to control flow rate and gas discharge velocity to enable interchangeability between a plurality of gases without having to change the gas/air mixing venturi size or air opening. A new approach is to use the available incoming higher gas pressure to the appliance then control the volumetric flow rate with the first orifice and then use a second orifice to change the velocity of discharge into the gas/air mixing venturi of the burner and therefore have adjustability of gas air mixing conditions without having to change the burner system or air flow control even when changing between very different fuel gases.Type: GrantFiled: January 17, 2017Date of Patent: May 25, 2021Assignee: Gas-Fired Products Inc.Inventors: Martin Brice, Stephan Richter, Eddie Wilson, Tharwat Saad
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Patent number: 10995388Abstract: Uneven sintering is prevented in a sintering machine, and thus sintered ore having high strength and a high lump yield rate is manufactured. A method for manufacturing sintered ore comprising: charging sintering raw material comprising fine ore and carbon material on a circulatively moving pallet to form a raw material layer; igniting the carbon material on a surface of the raw material layer and sucking air from above the raw material layer down to below the palette so that the air is introduced into the raw material layer; and combusting the carbon material in the raw material layer to thereby manufacture sintered ore, wherein fuel gas is discharged from a nozzle at a flow speed of 40 m/s or more, the discharged fuel gas is combusted to generate combustion gas, and the combustion gas is used for igniting the carbon material.Type: GrantFiled: April 20, 2018Date of Patent: May 4, 2021Assignee: JFE STEEL CORPORATIONInventors: Masato Kuroiwa, Shunsuke Nonaka, Yukimasa Horikawa, Shunsuke Oura, Tetsuya Jinno
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Patent number: 10941936Abstract: The present invention is a system that utilizes high pressure gas (greater than ½ psig) to control flow rate and gas discharge velocity to enable interchangeability between a plurality of gases without having to change the gas/air mixing venturi size or air opening. A new approach is to use the available incoming higher gas pressure to the appliance then control the volumetric flow rate with the first orifice and then use a second orifice to change the velocity of discharge into the gas/air mixing venturi of the burner and therefore have adjustability of gas air mixing conditions without having to change the burner system or air flow control even when changing between very different fuel gases.Type: GrantFiled: January 17, 2017Date of Patent: March 9, 2021Assignee: Gas-Fired Products Inc.Inventors: Martin Brice, Stephan Richter, Eddie Wilson, Tharwat Saad
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Patent number: 10690339Abstract: Premixed fuel and air are emitted in a staged fashion from a burner. A header delivers premixed fuel and air to a primary stage of combustion through a first plurality of outlets in communication with the pre-mixer. The same or another header may deliver premixed fuel and air to a secondary stage of combustion through a second plurality of outlets. A tile wall is located on the tile between the first plurality of outlets and the second plurality of outlets. A candelabra piece made of metal may comprise the pre-mixer and the header. In assembly, the candelabra piece may be inserted into the burner tile.Type: GrantFiled: August 24, 2017Date of Patent: June 23, 2020Assignee: HONEYWELL INTERNATIONAL INC.Inventors: Richard R. Martin, Matthew A. Martin
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Patent number: 10641175Abstract: The present disclosure is directed to a panel fuel injector having a first side wall that defines a plurality of first side injection outlets and a second side wall that defines a plurality of second side injection outlets. A premix air plenum, a fuel plenum, a plurality of first side premixing channels and a plurality of second side premixing channels are defined between the first side wall and the second side wall. Each first side premixing channel is in fluid communication with the premix air plenum, the fuel plenum and a respective first side injection outlet of the plurality of first side injection outlets. Each second side premixing channel is in fluid communication with the premix air plenum, the fuel plenum and a respective second side injection outlet of the plurality of second side injection outlets.Type: GrantFiled: February 24, 2017Date of Patent: May 5, 2020Assignee: General Electric CompanyInventors: Jonathan Dwight Berry, Michael John Hughes
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Patent number: 10634357Abstract: The invention refers to a sequential combustor arrangement comprising a first burner, a first combustion chamber, a mixer for admixing a dilution gas via a dilution gas inlet to the hot gases leaving the first combustion chamber during operation, a second burner, and a second combustion chamber arranged sequentially in a fluid flow connection. The sequential combustor arrangement further includes four cooling zones with a cooling channel. During operation a cooling gas flows through the cooling channels. The disclosure further refers to a method for operating a gas turbine with such a sequential combustor arrangement.Type: GrantFiled: November 28, 2017Date of Patent: April 28, 2020Assignee: ANSALDO ENERGIA SWITZERLAND AGInventors: Ewald Freitag, Adnan Eroglu, Michael Maurer, Peter Stuttaford
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Patent number: 10590847Abstract: A flue gas recirculation combustor includes a combustor chamber configured such that fuel and combustion gas are injected therein to cause combustion and having a nozzle-side end and a combustor outlet, a nozzle can connected to the nozzle-side end of the combustor chamber, a plurality of nozzles disposed in the nozzle can and configured such that an injection direction thereof is directed to a side of the combustor chamber, and a sleeve disposed in a premixing space defined between the nozzle can and the nozzle-side end of the combustor chamber, the sleeve including a recirculation pathway to recirculate combustion air from the combustor chamber to the premixing space.Type: GrantFiled: November 14, 2017Date of Patent: March 17, 2020Assignee: Doosan Heavy Industries Construction Co., LtdInventors: Hokeun Kim, Sunghyun Kim, Cheahong Choi
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Patent number: 10591156Abstract: A burner includes: an inner gas nozzle which extends along an axis while surrounding the axis, and which is capable of supplying a furnace with an inner combustion oxygen containing gas; a fuel supply nozzle surrounding the inner gas nozzle as seen in a direction along the axis, the fuel supply nozzle being capable of supplying the furnace with a fluid mixture of a solid powder fuel and a carrier gas; an outer gas nozzle surrounding the fuel supply nozzle as seen in the direction along the axis, the outer gas nozzle being capable of supplying the furnace with an outer combustion oxygen containing gas; and a flow-velocity-ratio adjustment apparatus capable of adjusting a relative flow velocity ratio of a discharge flow velocity of the inner combustion oxygen containing gas to a discharge flow velocity of the outer combustion oxygen containing gas.Type: GrantFiled: May 30, 2016Date of Patent: March 17, 2020Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Kenji Kiyama, Toshimitsu Ichinose, Miki Shimogori, Toshihiko Mine, Kenji Yamamoto, Ryuichiro Tanaka, Akira Baba, Koji Kuramashi, Koutaro Fujimura, Keigo Matsumoto
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Patent number: 10539322Abstract: A method for determining fatigue lifetime consumption of an engine component, by defining a reference thermal load cycle, the reference thermal load cycle being characterized by a reference load cycle amplitude and a reference load cycle time, and determining a reference load cycle lifetime consumption. The method includes measuring a temperature of the engine component, determining a thermal load cycle based upon the temperature measurement, determining a load cycle amplitude, determining a load cycle time, relating the load cycle time to the reference load cycle time, thereby determining a load cycle time factor, relating the load cycle amplitude to the reference load cycle amplitude, thereby determining a load cycle amplitude factor, combining the load cycle time factor and the load cycle amplitude factor into a combined load cycle factor for determining a load cycle lifetime consumption.Type: GrantFiled: April 7, 2017Date of Patent: January 21, 2020Assignee: Ansaldo Energia Switzerland AGInventors: Felipe Bolaños-Chaverri, Torsten Wind, Fernando Biagioli, Khawar Syed
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Patent number: 10513453Abstract: A roof mounted oxygen-fuel burner for a glass melting furnace can produce a variable moving or sweeping flame in the furnace and can also vary the flame shape. The burner has a housing having an oxygen inlet pipe coupled to an oxygen chamber and a fuel inlet pipe coupled to a fuel feeding crossover block. The fuel feeding block feeds fuel to a nozzle fuel port while the oxygen chamber feeds a plurality of nozzle oxygen ports which oxygen port outlets are angled toward the centralized fuel port outlet. A rotating impeller over the oxygen ports has a partial opening that causes a variable moving or sweeping flame in the burner as the impeller rotates. The impeller is also raised or lowered to control the flow of oxygen to the plurality of oxygen port outlets to control the shape of the burner flame.Type: GrantFiled: July 28, 2017Date of Patent: December 24, 2019Assignee: Air Products and Chemicals, Inc.Inventors: James K Nabors, Jr., Abigail Nabors
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Patent number: 10443849Abstract: A combustor arrangement of a gas turbine engine or power plant is disclosed, having at least one combustion chamber, at least one mixer arrangement for admixing air or gas to the hot gas flow leaving the combustion chamber. The mixer arrangement is configured to guide combustion gases in a hot gas flow path extending downstream of the combustion chamber, wherein the mixer includes a plurality of injection pipes pointing inwards from the side walls of the mixer arrangement for admixing air portions to cool at least the hot gas flow leaving combustion chamber. The mixer arrangement is applied to at least one volume of dilution air flowing from a first plenum and at least one volume of cooling air flowing from a second plenum.Type: GrantFiled: December 17, 2015Date of Patent: October 15, 2019Assignee: ANSALDO ENERGIA SWITZERLAND AGInventors: Andrea Ciani, Dieter Rebhan
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Patent number: 10378758Abstract: In a burner tip, combustion burner, and boiler, the burner tip is provided with: a mixing chamber provided at an inner portion of the tip body; a plurality of first mixed fluid jet holes of which base end portions communicate with the mixing chamber, of which front end portions open on a lateral side of the tip body, and which are placed in circumferential direction of the tip body at predetermined intervals; a fluid fuel supply passage configured to supply a fluid fuel to the mixing chamber; and an atomizing medium supply passage configured to supply an atomizing medium to the mixing chamber, thereby, combustibility is improved by facilitating the mixing of a fluid fuel and an atomizing medium and thus making the size of liquid fuel droplets smaller.Type: GrantFiled: October 2, 2014Date of Patent: August 13, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Kazuaki Hashiguchi, Akiyasu Okamoto, Hideyuki Hamaya
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Patent number: 10371377Abstract: A burner assembly combines oxygen and fuel to produce a flame. The burner assembly includes an oxygen supply tube adapted to receive a stream of oxygen and a solid fuel conduit arranged to extend through the oxygen tube to convey a stream of fluidized, pulverized, solid fuel into a flame chamber. Oxygen flowing through the oxygen supply tube passes generally tangentially through a first set of oxygen-injection holes formed in the solid fuel conduit and off-tangentially from a second set of oxygen-injection holes formed in the solid fuel conduit and then mixes with fluidized, pulverized, solid fuel passing through the solid fuel conduit to create an oxygen-fuel mixture in a downstream portion of the solid fuel conduit. This mixture is discharged into a flame chamber and ignited in the flame chamber to produce a flame.Type: GrantFiled: August 17, 2017Date of Patent: August 6, 2019Assignee: Honeywell International Inc.Inventors: Curtis Taylor, Brad Patterson, Jayson Perdue
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Patent number: 10344967Abstract: In a burner tip, combustion burner, and boiler, the burner tip is provided with: a mixing chamber provided at an inner portion of the tip body; a plurality of first mixed fluid jet holes of which base end portions communicate with the mixing chamber, of which front end portions open on a lateral side of the tip body, and which are placed in circumferential direction of the tip body at predetermined intervals; a fluid fuel supply passage configured to supply a fluid fuel to the mixing chamber; and an atomizing medium supply passage configured to supply an atomizing medium to the mixing chamber, thereby, combustibility is improved by facilitating the mixing of a fluid fuel and an atomizing medium and thus making the size of liquid fuel droplets smaller.Type: GrantFiled: October 2, 2014Date of Patent: July 9, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Kazuaki Hashiguchi, Akiyasu Okamoto, Hideyuki Hamaya
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Patent number: 10322661Abstract: A mobile kitchen comprises a housing disposed atop one or more wheel axles and a plurality of appliances disposed within the housing. Each appliance is heated by combustion of a distillate fuel. One or more air channels are disposed about each of the appliances, such that each air channel substantially isolates excess heat from combustion of the distillate fuel from a workspace within the housing. One or more first air blowers are associated with the air channels, and each is adapted to force air through the air channels and vent the excess heat to the exterior of the housing. One or more second air blowers are coupled to the housing, and each second air blower is adapted to vent a predetermined volume of air from within the workspace at least once per minute.Type: GrantFiled: July 2, 2013Date of Patent: June 18, 2019Assignee: BABINGTON TECHNOLOGY, INC.Inventors: Robert S. Babington, Victor Worsley, Luther Barnes, Larry Viverette, Ramiro Andrade, Juan C. Lemus
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Patent number: 10273178Abstract: A glassmelting furnace is provided in which the burners are elevated above the glassmelt surface and are oriented at an angle upwards relative to the glassmelt surface.Type: GrantFiled: December 16, 2015Date of Patent: April 30, 2019Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Osemwengie Uyi Iyoha, Hisashi Kobayashi, Euan J. Evenson
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Patent number: 10184403Abstract: A fuel nozzle for a gas turbine engine. The nozzle has a body and a center axis. The body has an inner circumferential surface circumscribing a central passageway which is coaxial with the center axis. The nozzle also has air passages which extend predominantly radially inward through the body. The air passage outlets of each air passage are circumferentially spaced apart from one another along the inner circumferential surface. Each air passage conveys air through the body toward the nozzle center axis and into the central passageway. The nozzle also has fuel passages which extend through the body. Each fuel passage is disposed within the body between adjacent circumferentially spaced apart air passages and is transverse to the direction of extension of its neighboring air passages.Type: GrantFiled: August 13, 2014Date of Patent: January 22, 2019Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Kian McCaldon, Oleg Morenko
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Patent number: 10107492Abstract: A biomass-mixed, pulverized coal-fired burner is provided, capable of burning biomass fuel as auxiliary fuel in large quantities and burning only pulverized coal when the biomass fuel is not sufficiently available. The biomass-mixed, pulverized coal-fired burner includes a biomass fuel jet nozzle that extends axially along the biomass-mixed, pulverized coal-fired burner, a fuel jet nozzle that is open midway in the biomass fuel jet nozzle, a secondary air nozzle that surrounds the fuel jet nozzle, and a tertiary air nozzle that surrounds the secondary air nozzle. A pulverized coal component in a fuel stream as a mixture of the pulverized coal fuel stream and the biomass fuel stream is distributed with a higher concentration on an outer circumferential wall side and a biomass fuel component in the fuel stream is distributed inside of the pulverized coal fuel component.Type: GrantFiled: March 21, 2013Date of Patent: October 23, 2018Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Koji Taniguchi, Atsunori Kato, Suguru Yabara, Yutaka Tanabe
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Patent number: 10011510Abstract: The claims define a submerged combustion melter comprising a submerged combustion burner (1) comprising three concentric tubes, all being closed at one end and open at the same opposite end, the internal tube (3) being connected to a source of oxygen containing gas (7), the middle tube (9) surrounding the internal tube (3) being connected to a source of fuel gas (11), and the outer tube (15) being connected to a source (19) of oxygen containing gas. The claims are also directed to a method of introducing a flame and/or combustion products into a melt from a submerged combustion burner and also directed to the use of the burner as a submerged combustion burner in a melter.Type: GrantFiled: July 30, 2014Date of Patent: July 3, 2018Inventors: Gerard Demott, Bostjan Marolt, Randy Etzkorn, David Ducarme
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Patent number: 10001275Abstract: A well test burner system has a plurality of burner nozzles supported by a support structure. Each burner nozzle has an air inlet, a well product inlet and an air/well product mixture outlet. At least one of the burner nozzles is supported to pivot relative to the support structure while the burner nozzle is operating to expel air/well product mixture.Type: GrantFiled: February 1, 2013Date of Patent: June 19, 2018Assignee: Halliburton Energy Services, Inc.Inventor: Trace Wayne Cody
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Patent number: 9982885Abstract: Devices, methods, and systems for utilizing a burner with a combustion air driven jet pump are described herein. One burner apparatus includes a jet pump located inside a burner housing, the jet pump having a combustion air inlet that receives combustion air, a chamber to receive the combustion air from the combustion air inlet, and a tapered portion of the chamber that tapers to an outlet having a smaller diameter than the diameter of the inlet.Type: GrantFiled: June 16, 2015Date of Patent: May 29, 2018Assignee: Honeywell International Inc.Inventors: Curtis L. Taylor, Joseph S. F. Goh, Brad Patterson, Marek Scholler
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Patent number: 9915479Abstract: A heat storage type combustion system equipped with a disk type distributor having improved sealing according to the present invention, the system includes: the distributor having a rotary distribution unit, a lower distribution unit located on the underside of the rotary distribution unit, an upper distribution unit located on the top of the rotary distribution unit, and a plurality of dumb buckles disposed equally spaced apart from each other along outer circumferential rims of the lower distribution unit and the upper distribution unit to fix the lower distribution unit and the upper distribution unit to each other. Each dumb buckle includes a left-handed screw and a right-handed screw formed on both end portions around the body thereof in such a manner as to be tightened or loosened repeatedly if necessary, and the number of dumb buckles is 4 to 12 in accordance with the sizes of the distributor.Type: GrantFiled: August 11, 2016Date of Patent: March 13, 2018Assignee: Kumho Environment Co., Ltd.Inventor: Seung Wook Choi
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Patent number: 9797351Abstract: A ducted combustion system is disclosed. The ducted combustion system may include a combustion chamber and a fuel injector in fluid connection with the combustion chamber and including at least one orifice opening from an injector tip of the fuel injector, the at least one orifice injecting fuel into the combustion chamber as at least one fuel jet. The system may further include at least one duct disposed within the combustion chamber such that the at least one fuel jet, at least partially, enters the at least one duct upon being injected into the combustion chamber. The system may further include a duct cooling system configured to cool a mixture of fuel and air of the at least one fuel jet.Type: GrantFiled: July 6, 2015Date of Patent: October 24, 2017Assignee: Caterpillar Inc.Inventors: Kenth Svensson, Chad Koci, Christopher Gehrke
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Patent number: 9689614Abstract: A method for combustion in an industrial furnace having fuel and a first oxidizer to heat a material includes arranging at least one lance in a sidewall of the furnace; supplying a second oxidizer with an oxygen content of at least 85 percent by weight in the form of a jet traveling at at least sonic velocity to the interior of the furnace through the at least one lance; running the jet of the second oxidizer in the horizontal plane above the material between and essentially in parallel with two consecutive rows of the roof burners; balancing an amount of the second oxidizer supplied per time unit so that the oxygen content supplied via the second oxidizer constitutes at least 50 percent by weight of the total supplied oxygen per time unit in the furnace.Type: GrantFiled: September 9, 2011Date of Patent: June 27, 2017Assignee: Linde AktiengesellschaftInventors: Anders Lugnet, Tomas Ekman
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Patent number: 9593847Abstract: A burner apparatus for a fired heating system and a method of burner operation. The burner provides stable operation when burning gas fuels having heating values ranging from low to high and accommodates sudden wide changes in the Wobbe value of the fuel delivered to the burner. The burner apparatus includes a plurality of exterior fuel ejectors and has an exterior notch which extends around the burner wall for receiving and combusting a portion of the gas fuel. At least a portion of the hot combustion product gas produced in the exterior notch is delivered through channels formed in the burner wall to the combustion area at the forward end of the burner. As the Wobbe value of the gas fuel decreases, one or more outer series of addition ejectors can be automatically activated as needed to maintain the amount of heat output desired.Type: GrantFiled: March 5, 2014Date of Patent: March 14, 2017Assignee: ZEECO, INC.Inventors: Darton J. Zink, Rex K. Isaacs, A. S. (Jamal) Jamaluddin, Charles E. Benson, Roberto O. Pellizzari, Cody L. Little, Seth A. Marty, K. Parker Imel, Jonathon E. Barnes, Chris S. Parker
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Patent number: 9453424Abstract: Effusion cooling holes formed through a transition component provided in a combustion section of a gas turbine engine. The transition component directs a hot working gas from a combustion basket to a first row of vanes in a turbine section of the engine. The effusion cooling holes are formed through an outer wall of the transition component in a direction so that the flow of air through the effusion holes is in a direction substantially opposite to the bulk flow direction of the working gas through the transition component.Type: GrantFiled: October 21, 2013Date of Patent: September 27, 2016Assignee: SIEMENS ENERGY, INC.Inventors: Blake R. Cotten, Richard L. Thackway, Charalambos Polyzopoulos
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Patent number: 9416974Abstract: The present application provides a combustor. The combustor may include an air flow path with a flow of air therein. A flow obstruction may be positioned within the air flow path and cause a wake or a recirculation zone downstream thereof. A number of fuel injectors may be positioned downstream of the flow obstruction. The fuel injectors may inject a flow of fuel into the air flow path such that the flows of fuel and air in the wake or the recirculation zone do not exceed a flammability limit.Type: GrantFiled: July 17, 2014Date of Patent: August 16, 2016Assignee: General Electric CompanyInventors: David Kaylor Toronto, Kwanwoo Kim, Abdul Rafey Khan, Luis Flamand
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Patent number: 9181919Abstract: A plasma oil-free ignition system in oxygen enriched environment comprises a plasma generator and a burner. The plasma oil-free ignition system comprises a sleeve group coaxially arranged with the burner, and the sleeve group comprises multiple coaxially sleeved sleeves. Annular spaces are formed between adjacent sleeves and between the sleeves and the burner. Oxygen ducts are arranged on the sleeves, and oxygen ducts are arranged on the burner. Plasmas jetted by the plasma generators form a local high temperature zone filled with high temperature plasma and pulverized coal air flow.Type: GrantFiled: February 16, 2012Date of Patent: November 10, 2015Inventors: Lu Zheng, Jianwen Zhang, Yang Zhao, Yuehua Li
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Patent number: 9091441Abstract: A burner at which fuel cannot be combusted with air as the only source of oxygen for combustion in a stable flame at the burner when the feed rate of the fuel is too low, when the fuel is fed at too high an air-to-fuel mass ratio, when the fuel contains too high an amount of inert matter, or when the specific energy content of the fuel is too low, is modified by supplying oxidant containing more than 21 vol. % oxygen into the base of a flame at the burner, whereupon such fuels can be combusted at the burner.Type: GrantFiled: May 14, 2013Date of Patent: July 28, 2015Assignee: PRAXAIR TECHNOLOGY, INC.Inventor: Stefan E. F. Laux
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Patent number: 9091435Abstract: A two-chamber gas burner with a case body, a cavity, an opening, a burner plate, and a plate unit connected to an upper surface of the burner plate, comprising a first chamber and at least one second chamber freely positioned in and supplementary to the first chamber. The plate unit comprises a first plate member directly mounting the burner plate onto the case body by screw nut connector; and a second plate member on top of the burner plate and the first plate securely mounting the burner plate for the second chamber. The gas burner is compact, small, light and has a generally one-piece structure with safe lighting process and stable flame, thereby effectively solving the ignition and explosion problems in high pressure gas burner, and hence is particularly suitable for high pressure high heat value gas burner. Its wind resistance and flame extinction arrangement further stabilized the burning process.Type: GrantFiled: March 26, 2012Date of Patent: July 28, 2015Inventors: Weiqun Jin, Weidong Jin
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Patent number: 9091440Abstract: A burner at which fuel cannot be combusted with air as the only source of oxygen for combustion in a stable flame at the burner when the feed rate of the fuel is too low, when the fuel is fed at too high an air-to-fuel mass ratio, when the fuel contains too high an amount of inert matter, or when the specific energy content of the fuel is too low, is modified by supplying oxidant containing more than 21 vol. % oxygen into the base of a flame at the burner, whereupon such fuels can be combusted at the burner.Type: GrantFiled: May 14, 2013Date of Patent: July 28, 2015Assignee: PRAXAIR TECHNOLOGY, INC.Inventor: Stefan E. F. Laux
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Patent number: 9046263Abstract: A method and apparatus for burning fuel are described In a conventional boiler the combustion process produces particles which form a layer of deposits on boiler tubes, thus reducing heat transfer efficiency A fuel burner (100) includes a casing, a combustion chamber (106), a tangential gas inlet (108), a fuel delivery system (112) and an exhaust port (114) The casing includes a lower wall (102), an upper wall (104) and a cylindrical side wall (105) formed between the lower and upper walls (102, 104) and encloses the combustion chamber (106) The tangential gas inlet (108) is formed in the cylindrical wall (105) of the combustion chamber (106) The fuel delivery system (112) is configured to deliver fuel into the tangential air inlet (108) The exhaust port (114) is formed in the upper wall (104) of the combustion chamber (106) Gas is delivered into the combustion chamber (106) at a velocity and flow rate and mixes with fuel delivered from the fuel delivery system (112), such that a clean flame burns in the combType: GrantFiled: July 8, 2010Date of Patent: June 2, 2015Inventor: Harold Haynes
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Patent number: 9017067Abstract: A premix burner arrangement for safely oxygen-enriching a premix air-fuel combustion system is disclosed. In the disclosed burner arrangement, a first conduit is arranged and disposed to provide a first gas stream. The first gas stream is a self-reactive or self-flammable premixture comprising air and a combustible gas. At least one second conduit is arranged and disposed to provide a second gas stream circumferentially around the first gas stream. The second gas stream includes oxygen. The premix burner arrangement is configured to combust or react the first stream at a temperature at least 1000° F. greater than the temperature of the second stream. A method and combustion system including the premix burner arrangement are also disclosed.Type: GrantFiled: February 15, 2012Date of Patent: April 28, 2015Assignee: Air Products and Chemicals, Inc.Inventors: Jin Cao, Aleksandar Georgi Slavejkov, Shailesh Pradeep Gangoli, Jeffrey D. Cole
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Patent number: 8974226Abstract: The present invention relates to a method for operating combustion process in a furnace whereby a primary fuel and a secondary fuel are burnt, to an apparatus for injecting liquid oxygen into the furnace and also to the corresponding furnace. The method comprises at least the following steps: the primary fuel and a primary oxidizer are injected into the furnace to create a primary combustion zone, liquid oxygen is injected in as secondary oxidizer such that the secondary fuel combusts with the secondary oxidizer thereby creating a distinct secondary combustion zone. The invention makes it possible for a secondary fuel having a significantly lower calorific value than the primary fuel to be burnt completely in the furnace, such that a product to be produced in the furnace has an improved quality.Type: GrantFiled: March 27, 2012Date of Patent: March 10, 2015Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventor: Frank Rheker
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Patent number: 8969644Abstract: A method is proposed for providing an oxygen-containing gas stream for the endothermic reaction of an initial stream comprising one or more hydrocarbons, having a predetermined oxygen concentration and a predetermined temperature, wherein a fluid fuel stream is combusted with a primary air stream at ? values of the primary air stream to the fluid fuel stream of from 0.6 to 1.2 to obtain a combustion gas stream, and a secondary air stream is admixed to the combustion gas stream to obtain the oxygen-containing gas stream for the endothermic reaction, with the predetermined oxygen concentration and the predetermined temperature of the oxygen-containing gas stream being adjusted via the flow rate and the temperature of the secondary air stream.Type: GrantFiled: January 31, 2008Date of Patent: March 3, 2015Assignee: BASF SEInventors: Gerhard Olbert, Franz Corr, Sven Crone
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Patent number: 8959793Abstract: An oven configured for drying a container. The oven includes a housing defining an interior space including a supply chamber and a return chamber. A conveyor is configured for movement within a portion of the interior space of the housing defined by a plurality of semi-circular shaped duct sections connected at each end of the semi-circular shaped duct sections to a straight duct section. Each duct section includes two side walls coupled to a back wall defining a continuous U-shaped duct path through which the conveyor moves. The oven is further configured to provide a temperature difference between any two points within the interior space of the oven housing controlled to plus or minus two degrees Fahrenheit, by a uniform air flow throughout the oven. The uniform air flow is facilitated by the sizing and spacing of various circular orifices and slotted orifices in the continuous duct path.Type: GrantFiled: March 14, 2013Date of Patent: February 24, 2015Assignee: International Thermal Systems, Inc.Inventors: John Zea, Yougui Zhao, Dan Bein
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Patent number: 8926317Abstract: Method of controlling the operation of a combustion device to provide safe and reliable operation while reducing NOx emission that includes providing a flow of fuel and diluent at a determined volume ratio to a flame in the combustion device; providing a flame stability sensor to generate a measurement of a characteristic of the flame, providing a flow measurement for each of the fuel and diluent, and controlling the determined volume ratio of fuel:diluent using the measurement from the flame stability sensor and/or flow measurements. A combustion system incorporating this method also is included.Type: GrantFiled: December 14, 2009Date of Patent: January 6, 2015Assignee: ExxonMobil Research and Engineering CompanyInventors: John T. Farrell, San Chhotray, Gary T. Dobbs, Manuel S. Alvarez, Patrick D. Schweitzer
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Patent number: 8899970Abstract: Burner device (2) for an industrial furnace (1) comprising a channel (3) for fuel, a channel (4) for a first oxidant, an outlet (9) for flue gases, a control device (10) and a heat buffer (7), where the first oxidant and the flue gases alternatingly are led through the heat buffer (7). The invention is characterized in that a separate lancing device (6) is arranged to supply a second oxidant to the burner device (2).Type: GrantFiled: December 9, 2008Date of Patent: December 2, 2014Assignee: AGA ABInventors: Tomas Ekman, Anders Lugnet
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Patent number: 8864491Abstract: A method for low NOx combustion, without premixing of fuel and air prior to passage to a combustor, is provided wherein a fuel is injected into a reaction zone via an eductor thereby inducing an air flow and producing a fuel-rich mixture. The fuel-rich mixture is reacted and produces partial reaction products plus heat. A portion of the heat is to transferred to a cooling air stream and the cooled partial reaction products are brought into contact with the heated cooling air stream for combustion. Increased injection of the fuel results in an increased induction of the air flow.Type: GrantFiled: December 12, 2007Date of Patent: October 21, 2014Assignee: Precision Combustion, Inc.Inventors: William C. Pfefferle, Benjamin D. Baird, Shahrokh Etemad, Sandeep K. Alavandi
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Patent number: 8827691Abstract: During a heating phase, injection of a jet of fuel and oxidant (fuel annularly enshrouding oxidant or oxidant annularly enshrouding fuel) from a fuel-oxidant nozzle is combusted in a combustion space. During a transition from the heating phase to a distributed combustion phase, an amount of a secondary portion of either the fuel or oxidant is injected as a jet into the combustion space while the primary portion of that same reactant from the fuel-oxidant nozzle is decreased. At some point during the transition phase, a jet of actuating fluid is injected at an angle towards the jet of reactants from the fuel-oxidant nozzle and/or towards the jet of the secondary portion of reactant. The jet of primary portions of reactants and/or secondary portion of reactant is caused to be bent/deviated towards the other of the two jets. The staging of the secondary portion of reactant is increased until a desired degrees of staging and commencement of a distributed combustion phase are achieved.Type: GrantFiled: July 31, 2010Date of Patent: September 9, 2014Assignees: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc.Inventors: Rajeev S. Prabhakar, Remi Pierre Tsiava, Magnus Mortberg, Benoit Grand, Bertrand Leroux, Vivek Gautam
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Patent number: 8814561Abstract: Stable operation of oxyfuel combustion boiler is ensured and amplification in likelihood of or downsizing of forced draft fan is attained. Upon change of commanded boiler load from start value to target value by target time, a feed amount of oxygen from oxygen producing device is regulated for attainment of oxygen concentration on entry side of the boiler body from reference value to attainment point or target entry-side oxygen concentration within entry-side oxygen concentration regulation range by target time. After attainment to attainment point, control is made to return entry-side oxygen concentration to reference value at return point. Airflow rate of forced draft fan is controlled with change rate smaller than change rate with which air flow rate of forced draft fan reaches target value by target time.Type: GrantFiled: July 16, 2013Date of Patent: August 26, 2014Assignee: IHI CorporationInventors: Tetsuya Hori, Toshihiko Yamada, Yohei Akutsu
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Patent number: 8764435Abstract: A modulating furnace having a variable rate burner and a controller is operated at a first burner firing rate for a first period of time, and a higher burner firing rate once the first period of time has expired. In some instances, the burner may be operated only while the controller is receiving a call for heat from a thermostat or the like.Type: GrantFiled: February 1, 2012Date of Patent: July 1, 2014Assignee: Honeywell International Inc.Inventors: Timothy J. Nordberg, Brent Chian, Michael W. Schultz, Douglas D. Bird
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Patent number: 8714969Abstract: The invention relates to a fuel combustion method in which one jet of fuel and at least two jets of oxidant are injected. According to the invention, the first jet of oxidant, known as the primary oxidant jet, is injected such as to be in contact with the jet of fuel and to produce a first incomplete combustion, the gases produced by said first combustion comprising at least one part of the fuel, and the second jet of oxidant is injected at a distance from the jet of fuel such as to combust with the part of the fuel present in the gases produced by the first combustion. Moreover, the primary oxidant jet is divided into two primary jets, namely: a first primary oxidant jet, known as the central jet, which is injected at the centre of the jet of fuel; and a second primary oxidant jet, knows as the sheathing jet, which is injected coaxially around the fuel jet.Type: GrantFiled: December 6, 2004Date of Patent: May 6, 2014Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Bertrand Leroux, Remi Pierre Tsiava
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Patent number: 8702418Abstract: In one embodiment, a method for generating heat energy includes injecting a stream having a concentration of at least 50% oxygen (O2 stream) into a primary gas stream through a mixer, the mixer discharging the O2 stream as two or more spaced jets traversing the primary stream, thereby enriching the primary gas stream. The method further includes mixing fuel with the enriched primary gas stream, thereby forming a fuel stream; and combusting the fuel stream, thereby forming a flue gas stream.Type: GrantFiled: August 21, 2012Date of Patent: April 22, 2014Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: M. Usman Ghani, Florian Gautier, Rajani K. Varagani, Susie Levesque, Bernard Labegorre, Frederic Camy-Peyret, Sylvain Grillon, Pavol Pranda
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Patent number: 8701416Abstract: A double annular radially staged combustor for a gas turbine engine having a reduced internal flow transitioning area between an outboard primary combustion zone and al inboard secondary combustion zone. The primary combustion zone is an annular shell form with a radially inboard annular exit. An outboard ring with thru holes and an inboard annular channel yields a quick quench zone. The secondary combustion zone, adjacent to and downstream of the quick quench zone is of an annular shell form, generally radially inboard of the primary combustion zone. In a preferred embodiment the secondary combustion zone exiting hot gases flows into a dilution zone prior to exiting the combustor.Type: GrantFiled: June 19, 2007Date of Patent: April 22, 2014Inventor: Joseph Michael Teets
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Patent number: 8696348Abstract: Burner assembly comprising (a) an elongated body having a periphery, a discharge end adjacent a combustion zone, and an axis, wherein the axis extends into the combustion zone; (b) one or more oxidant nozzles disposed at the discharge end of the elongated body and adapted to discharge a gaseous oxidant into the combustion zone; and (c) one or more fuel nozzles disposed at the discharge end of the elongated body and adapted to discharge a fuel into the combustion zone. At least one of the oxidant and fuel nozzles is characterized by a shape factor, ?, that is greater than about 10, wherein ? is a dimensionless parameter defined as ?=P2/2A where P is the perimeter dimension of the discharge opening and A is the area of the discharge opening.Type: GrantFiled: April 26, 2006Date of Patent: April 15, 2014Assignee: Air Products and Chemicals, Inc.Inventors: Jin Cao, Mahendra Ladharam Joshi, Aleksandar Georgi Slavejkov