Feeds Discharged Coaxially Patents (Class 431/187)
  • Patent number: 10393373
    Abstract: An oxy-gaseous fuel burner (400, 500) or a solid fuel burner (700) having an annular cavity (404, 504, 704) upstream from and proximate to an outlet plane (416, 516, 716) and a converging (434, 734) or converging-diverging nozzle (537) located upstream from and proximal to the cavity (404, 504, 704). The solid fuel burner (700) also is preferably operated so that the velocity of gas exiting a second annulus (730) is less than the velocity of gas exiting a central conduit (710).
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: August 27, 2019
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Anup Vasant Sane, Avishek Guha
  • Patent number: 9217569
    Abstract: A burner and a method for operating a burner are provided. The burner includes a channel having a mixing zone and having a feed for an oxidation means, particularly an air feed, and at least one fuel feed for injecting fuel, wherein a separating means which divides the channel over a wide range of the channel into at least two separated channels, namely a first channel and a second channel, is provided in the channel. The method for operating a burner having a channel includes a mixing zone into which an oxidation mass flow and fuel are injected, wherein two substantially separate flow paths are formed by means of a separating means in the channel and the at least two separated first and second channels, formed by the separating means.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: December 22, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Bernd Prade
  • Patent number: 9039407
    Abstract: The burner preferably exclusively burns substantially explosible solid fuels and preferably has instant ON-OFF thermostat control, wastes no energy preheating the enclosure or external air supply, achieves stable combustion the moment the powder-air mix is ignited in our burner, is used in the upward vertical mode except for oil burner retrofits, burns a solid fuel in a single-phase regime as if it were a vaporized liquid or gas, is designed to complete combustion within the burner housing itself rather than in a large, high temperature furnace enclosure which it feeds, has an ultra-short residence time requirement, is a recycle consuming burner with self-contained management of initially unburned particles, is much smaller, simpler and lower cost, has a wider dynamic range/turndown ratio, is more efficient in combustion completeness and thermal efficiency, and operates with air-fuel mix approximately at the flame speed.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: May 26, 2015
    Inventors: James K. McKnight, Edward Bacorn, Ken W. White
  • Patent number: 9017067
    Abstract: 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: Grant
    Filed: February 15, 2012
    Date of Patent: April 28, 2015
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jin Cao, Aleksandar Georgi Slavejkov, Shailesh Pradeep Gangoli, Jeffrey D. Cole
  • Patent number: 9017068
    Abstract: There is provided a top-firing hot blast stove capable of enhancing combustion efficiency in burner system, supplying high-temperature combustion gas to an entire checker chamber, and suppressing damage on a refractory material on an inner wall of a burner duct. A top-firing hot blast stove 10 has a burner system including: a burner 1 for passing fuel gas or combustion air to each of three or more pipe lines in a multiple pipe line structure; and a burner duct 2. A core pipe line 1b and a central pipe line 1c include a swirling flow generating means provided for generating a swirling flow of the fuel gas or the combustion air, while an outermost pipe line 1d carries a linear flow of the fuel gas or the combustion air, so that combustion gas HG including a linear component HG? and a swirling component HG? is generated in the burner duct 2.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: April 28, 2015
    Assignees: Nippon Steel & Sumikin Engineering Co., Ltd., NS Plant Designing Corporation
    Inventors: Norimasa Maekawa, Koya Inoue, Hiroshi Shimazu, Shunji Koya, Naoki Kunishige, Nobuhiro Ohshita
  • Publication number: 20150111159
    Abstract: The invention relates to a method for operating a multi-gas burner having at least one burner lance with a first, second and third nozzle and having a first, second and a third feed chamber. It is provided according to the invention that for high-calorific operation air is fed via the first nozzle, O2-depleted gas via the second nozzle and the high-calorific combustion gas via the third nozzle into the combustion chamber, where they are combusted. Furthermore the invention relates to a multi-gas burner for operation with a low-calorific and a high-calorific combustion gas.
    Type: Application
    Filed: June 5, 2012
    Publication date: April 23, 2015
    Applicant: Loesche GmbH
    Inventors: Holger Wulfert, André Baetz
  • Publication number: 20150064632
    Abstract: A fluid fuel burning device, comprising: an elongated combustion compartment comprising side walls, where distal end is open allowing fluid communication from inside the combustion compartment and out of compartment; an insulation layer arranged on the inner surface of the side walls and/or on an inner surface of the proximal end of the compartment, preventing heat inside the compartment from radiating away from the compartment from the side walls and/or the proximal end, air flow means for providing a current of air, a fuel nozzle for aerification of the fluid fuel inside the combustion compartment, fuel feeding means for feeding fluid fuel to the fuel nozzle, pressure providing means for applying pressure to the fluid fuel fed via the fuel feeding means, and where the insulation layer comprises a heat absorbent layer that is of a temperature retentive material and radiating heat from the absorbent layer into the combustion compartment.
    Type: Application
    Filed: March 27, 2013
    Publication date: March 5, 2015
    Applicant: PURETEQ A/S
    Inventor: Dennis Søgaard
  • Publication number: 20150050608
    Abstract: Provided is a gas-air mixing device for a combustor which effectively controls the amount of gas and air supplied to a burner provided in a combustor, such as a boiler or a water heater, thus improving the turn-down ratio which leads to increased convenience for using hot water and heat and enhanced durability of the burner. The gas-air mixing device for a combustor comprises: a housing, connected on one side to a turbo fan; a discharge part disposed on one side of the housing and in contact with the turbo fan; first and second air supply parts, provided on the other side of the discharge part and separated by a first partition; first and second gas supply parts, separated by a second partition; and an opening/closing means for controlling the flow of gas and air by opening or blocking the second air supply part and the second gas supply part.
    Type: Application
    Filed: January 16, 2013
    Publication date: February 19, 2015
    Applicant: KYUNGDONG NAVIEN CO., LTD.
    Inventors: Myoung Gee Min, Dae Hyun Kim
  • Publication number: 20150050605
    Abstract: A low NOx burner has a housing that includes a burner head defining a gas manifold and a primary flame zone downstream of the burner head. The burner has a gas inlet for receiving gas. Flow-through air vents are disposed around a center of the burner head and extending through the burner head thereby enabling cold core air to flow from an annular core space upstream of the burner head to the primary flame zone downstream of the burner head. The burner also includes a plurality of premix air vents in fluid communication with the manifold for premixing air and gas within the manifold and for emitting premixed air and gas into the primary flame zone. A plurality of staging pipes extend from the manifold into the primary flame zone for conveying gas into the primary flame zone. The burner includes an ignition device extending into the primary flame zone.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Applicant: Haul-All Equipment Ltd.
    Inventors: Sergiu Desi-Seulean, Jerry Ejdrygiewicz, David Neufeldt
  • Publication number: 20150010871
    Abstract: A burner with a central oxidizer supply tube and an outer concentric fuel supply tube has a recycle gas duct arranged between the central oxidizer supply tube and the outer concentric fuel supply tube.
    Type: Application
    Filed: June 19, 2014
    Publication date: January 8, 2015
    Applicant: Haldor Topsoe A/S
    Inventor: Claus Robert Starcke
  • Publication number: 20150000344
    Abstract: Apparatus includes a first and second conduits configured to form an annulus between them. An adjustable structure includes a body having an upper surface, a lower surface, and a circumferential surface abutting a portion of the internal surface of the second conduit. The structure is adjustable axially in relation to and removably attached to the first conduit via a hub. The hub defines a central passage for fuel or oxidant. The body has one or more non-central through passages configured such that flow of an oxidant or fuel therethrough causes the fuel or oxidant to intersect flow of fuel or oxidant exiting from the central passage in a region above the upper surface of the body.
    Type: Application
    Filed: September 15, 2014
    Publication date: January 1, 2015
    Inventor: Mark William Charbonneau
  • Publication number: 20150000343
    Abstract: A submerged burner for a glass- or rock-melting furnace, including a plurality of in-line injectors, each injector including a cylinder-shaped mixing chamber, with an ejection orifice, a fuel-supply duct and an oxidant-supply duct opening into the mixing chamber at the cylinder jacket in a direction causing a tangential flow of the fuel and of the oxidant relative to the cylinder jacket, and a duct system making it possible for a coolant to flow inside the burner, and, preferably on either side of the alignment of injectors, placed parallel to and all along the latter, solid metal sides rising from the injectors, and protective partitions situated on the top of the solid metal sides.
    Type: Application
    Filed: February 5, 2013
    Publication date: January 1, 2015
    Applicant: Saint-Gobain Isover
    Inventors: Yannick Lefrere, Julien Marie, David Galley, Sebastien Chesnel, Frederic Lopepe, Oleg Boulanov
  • Patent number: 8920159
    Abstract: An apparatus is provided for combining oxygen and fuel to produce a mixture to be burned in a burner. The oxygen-fuel mixture is ignited in a fuel-ignition zone in a flame chamber to produce a flame.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: December 30, 2014
    Assignee: Honeywell International Inc.
    Inventor: Curtis Taylor
  • Patent number: 8899224
    Abstract: A burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: December 2, 2014
    Assignee: Corning Incorporated
    Inventor: Curtis Richard Cowles
  • Publication number: 20140322658
    Abstract: A burner nozzle for delivering fuel to a burner flame in a furnace includes an inner cylinder and an outer cylinder that are both hollow. The inner cylinder is at least partly disposed within the outer cylinder and axially aligned with it, and is movable in an axial direction relative to the outer cylinder. One end of the inner cylinder has at least one outward projection extending in a radial direction from the outer surface of the cylinder, this projection serving to decrease the free cross-sectional area between the inner cylinder and the outer cylinder at that end of the inner cylinder.
    Type: Application
    Filed: April 25, 2014
    Publication date: October 30, 2014
    Applicant: RJM Corporation (EC) Limited
    Inventors: John GOLDRING, Steven BILLETT, Matthew SHILEDS
  • Patent number: 8827691
    Abstract: 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: Grant
    Filed: July 31, 2010
    Date of Patent: September 9, 2014
    Assignees: 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
  • Patent number: 8801428
    Abstract: A combustor includes an end cap having upstream and downstream surfaces and a cap shield surrounding the upstream and downstream surfaces. First and second sets of premixer tubes extend from the upstream surface through the downstream surface. A first fuel conduit supplies fuel to the first set of premixer tubes. A casing circumferentially surrounds the cap shield to define an annular passage, and a second fuel conduit supplies fuel through the annular passage to the second set of premixer tubes. A method for supplying fuel to a combustor includes flowing a working fluid through first and second sets of premixer tubes, flowing a first fuel into the first set of premixer tubes, and flowing a second fuel through an annular passage surrounding the end cap and into the second set of premixer tubes.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: August 12, 2014
    Assignee: General Electric Company
    Inventors: Patrick Benedict Melton, Willy Steve Ziminsky, Gregory Allen Boardman
  • Patent number: 8696348
    Abstract: 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: Grant
    Filed: April 26, 2006
    Date of Patent: April 15, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jin Cao, Mahendra Ladharam Joshi, Aleksandar Georgi Slavejkov
  • Publication number: 20140041559
    Abstract: A furnace-heating combustion apparatus that allows adjustment of a ratio between the amount of primary air and the amount of secondary air. A double-tube elongate burner extends through a rear wall portion of an air box disposed away from a furnace wall. The leading end portion of the burner is disposed inside a tube section such that a secondary air conduit is formed between an outer circumferential face of the leading end portion and an inner circumferential face of the tube section. A primary air conduit is provided at the leading end portion of the burner to introduce the air inside the air box from the rear end portion and cause it to flow toward the leading end portion. A burner supporting means is provided for to allow adjustment of the position of the burner in the longitudinal direction relative to the rear wall of the air box.
    Type: Application
    Filed: January 28, 2011
    Publication date: February 13, 2014
    Applicant: OSAKA GAS CO., LTD.
    Inventor: Makoto Hirano
  • Patent number: 8647111
    Abstract: A method of combusting ammonia is described, in which an exhaust gas containing varying amounts of at least ammonia and hydrogen is conveyed from a chamber to a combustion nozzle (34) connected to a combustion chamber (36). A combustion gas for forming a combustion flame within the chamber is supplied to the chamber. Depending on the relative amounts of ammonia and hydrogen exhaust from the chamber, hydrogen is added to the exhaust gas so that, when the exhaust gas contains ammonia, the gas combusted by the flame contains at least a predetermined amount of hydrogen.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: February 11, 2014
    Assignee: Edwards Limited
    Inventors: Darren Mennie, Nicholas Benjamin Jones
  • Publication number: 20140038116
    Abstract: Burner for a furnace comprising at least one supply channel for supplying an oxidizing medium and a plurality of peripheral fuel supply channels, wherein the channels have exit openings arranged adjacent each other at a burner end surface for forming during use upon reaction of supplied fuel with supplied oxidizing medium a flame front, wherein the exit openings are asymmetrically arranged with respect to any plane arranged transverse to the end surface of the burner and extending through a burner central axis whereby the distribution of the fuel exit openings and/or the dimension of the fuel exit openings and/or the exit angle of the fuel exit openings and/or the shape of the fuel exit openings are arranged asymmetrically to said any plane, such that during use a flame front is created that is asymmetrical with respect to said any plane.
    Type: Application
    Filed: January 20, 2012
    Publication date: February 6, 2014
    Applicant: TECHNIP FRANCE
    Inventors: Simon Barendregt, Franciscus Arnoldus Maria Jeunink, Izaak Jacobus Risseeuw
  • Publication number: 20140004469
    Abstract: Method of combusting a fuel with an oxidizer and corresponding burner assembly, whereby a jet of fuel and a jet of primary oxidizer are injected into a combustion zone in contact with one another so as to generate a primary fuel-rich flame, a swirling first peripheral gas jet is injected through a first passage around the fuel jet and primary oxidizer jets and a swirling second peripheral gas jet is injected through a second passage around the first peripheral gas jet and whereby a jet of secondary oxidizer is injected through a passage into the combustion zone between the first and second peripheral gas jets.
    Type: Application
    Filed: March 9, 2012
    Publication date: January 2, 2014
    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes
    Inventors: Patrick Recourt, Remi Tsiava
  • Publication number: 20130323656
    Abstract: The present invention relates to a burner for a furnace with the following features: a first feed for at least one fuel, preferably with a primary outlet for an oxidizing agent, preferably oxygen; a second feed, surrounding the first feed, with at least one secondary outlet for the oxidizing agent; a third feed, surrounding the second feed, with at least one enveloping jet outlet for the oxidizing agent, wherein the second feed and the third feed are designed such that a first velocity with which the oxidizing agent emerges from the at least one secondary outlet is greater than a second velocity with which the oxidizing agent emerges from the at least one enveloping jet outlet. The second feed thereby preferably enables a first volumetric flow of the oxidizing agent that is greater than or equal to a second volumetric flow of the oxidizing agent through the third feed.
    Type: Application
    Filed: February 10, 2012
    Publication date: December 5, 2013
    Applicant: L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
    Inventors: Dietmar Wieck, Christian Windhovel
  • Patent number: 8512033
    Abstract: A burner includes separate fuel and oxidant conduits. The fuel conduit has inlet, transitional, and outlet sections, and the oxidant conduit has inlet and outlet sections. The burner has a longitudinal axis and including a burner tip having a first elongated edge adjacent a flow of the fuel, and a second elongated edge adjacent a flow of an oxidant and forming a primary tip angle (?) of less than about 15° from a line parallel to the longitudinal axis and intersecting an upstream surface parallel to the longitudinal axis. The first elongated edge and the second elongated edge form a secondary tip angle (?) greater than the primary tip angle (?) and less than about 90° from a line tangent to and extending from the first elongated edge in the direction of the flow of the fuel.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: August 20, 2013
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Kevin Alan Lievre
  • Patent number: 8485813
    Abstract: A low NOx burner system is disclosed that reduces the emission of CO and HC during cold furnace startups, minimizes NOx formation with preheated air, and provides a flat stable flame due to burner design improvements including three stage combustion. The burner system is designed to operate in either a low or high temperature mode by controlling the amount of combustion air provided to stage 1 and stage 2 combustion. The burner system is designed to heat the interior of a furnace for high-temperature combustion/furnace processes, such as aluminum melting and steel processes. The burner system can also be used for low temperature processes at temperatures below the auto-ignition temperature of the fuel and still produce very low CO, HC and NOx emissions.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: July 16, 2013
    Assignee: Hauck Manufacturing Company
    Inventors: James J. Feese, Bruce A. Wartluft
  • Patent number: 8469700
    Abstract: A system for predicting fouling and corrosion of a combustion system in an industrial process includes a pipe, a restrictive element, and a fouling and corrosion detector. The pipe contains a fuel. The restrictive element is coupled to the pipe and the fuel passes through the restrictive element. The fouling and corrosion detector is coupled to the pipe and is adapted to detect a characteristic signature of the restrictive element and to generate an alarm if a change in the detected signature exceeds a predetermined limit relative to a baseline signature.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: June 25, 2013
    Assignee: Rosemount Inc.
    Inventors: Marcos Peluso, Scott Eliason, Gregory C. Brown
  • Publication number: 20130145973
    Abstract: The present invention provide a fuel distribution device (9) for a burner, comprising an inlet end (9a), an outlet end (9b) and a distribution channel (9c) extending therebetween as well as n fuel feeding tubes (5) extending from the inlet end (9a) into the distribution channel (9c), characterized in that, the outlet end (9b) is provided with n groups of distribution opening, each of the groups includes m distribution openings distributed evenly along a circumference direction of the outlet end (9b), and in that the m feeding branch pipes (8) extending from each of the fuel feeding tubes (5) are communicated with the m distribution openings of each group respectively, wherein m, n are positive integers greater than or equal to 2. This design of the fuel distribution device improves the redundancy of the burner so as to ensure the even distribution of the fuel such as powdered coals at the outlet end of the fuel distribution device upon failure of one or several fuel feeding tubes.
    Type: Application
    Filed: December 24, 2009
    Publication date: June 13, 2013
    Applicant: Changzheng Engineering Co., Ltd.
    Inventors: Mingkun Wang, Congbin Jiang, Wei Xin, Jinjun Guo, Dong Ma
  • Patent number: 8454354
    Abstract: An oxy-fuel burner that co-fires liquid fuel and gaseous fuel to create a more luminous flame. The characteristics of a liquid fuel spray and the gaseous fuel and primary oxidant gas flows, as well as the geometry of the burner is adapted to shroud the liquid fuel from the primary oxidant until it exits a precombustor and to prevent the liquid fuel from contacting the walls of the precombustor.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: June 4, 2013
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Matthew James Watson, Mark Daniel D'Agostini, Jin Cao, Aleksandar Georgi Slavejkov
  • Patent number: 8454350
    Abstract: Disclosed is a combustor including a baffle plate having at least one through baffle hole and at least one fuel nozzle extending through the at least one through baffle hole. At least one diluent shroud is affixed to the at least one baffle plate and is configured to guide a diluent flow toward a mixing chamber of the at least one fuel nozzle. Further disclosed is a method for introducing a diluent flow into a mixing chamber of a fuel nozzle including urging the diluent flow from a plenum through a baffle plate gap between a baffle plate and an outer surface of the fuel nozzle. The diluent flow is directed via at least one diluent shroud extending from the baffle plate toward a plurality of air swirler holes extending through a fuel nozzle tip. The diluent flow is flowed through the plurality of air swirler holes into the mixing chamber.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 4, 2013
    Assignee: General Electric Company
    Inventors: Jonathan Dwight Berry, John Joseph Lipinski, Girard Albert Simons, Abhijit Som
  • Patent number: 8449288
    Abstract: A method for reducing NOx formation, including the steps of: providing a furnace with a plurality of secondary air injection ducts, asymmetrically positioned in an opposing manner; injecting fuel with primary air through a first stage prior to injection of a second air; injecting secondary air and aqueous urea solution through the plurality of reagent injection ducts; controlling the asymmetrical injection to produce a high velocity mass flow and a turbulence resulting in dispersion of the urea solution into the combustion space, thereby providing reduced NOx formation in the combustion process.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: May 28, 2013
    Assignee: Nalco Mobotec, Inc.
    Inventor: Brian S. Higgins
  • Patent number: 8430665
    Abstract: Combustion systems having reduced nitrogen oxide emissions and methods of using the same are disclosed herein. In one embodiment, a combustion system is provided. The combustion system includes a combustion zone, which includes a burner for converting a fuel, under fuel rich conditions, to a flue gas. An intermediate staged air inlet is downstream from the combustion zone, for supplying intermediate staged air to the flue gas and producing fuel lean conditions. A reburn zone is downstream from the intermediate staged air inlet for receiving the flue gas. A process for using the combustion system and a method of reducing NOX flowing into the reburn zone of a combustion system are also described herein.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: April 30, 2013
    Assignee: General Electric Company
    Inventors: Roy Payne, Larry William Swanson, David Kelly Moyeda, Antonio Marquez
  • Patent number: 8419420
    Abstract: A burner includes a first fuel feed and a first oxidant feed surrounding the first fuel feed in the shape of a ring. The burner includes a second fuel feed arranged about the first oxidant feed in the shape of a ring, and a second oxidant feed arranged about the second fuel feed in the shape of a ring. In addition, a plurality of oxygen lances are provided, which have a smaller radial distance from the burner centre than the second fuel feed.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 16, 2013
    Assignee: Linde Aktiengesellschaft
    Inventor: Thomas Niehoff
  • Patent number: 8419421
    Abstract: An injection flame burner in which temperature of the generated flame itself can be sustained around the flame. A plurality of double structure injection nozzles each consisting of an outer tube and an inner tube provided coaxially with the outer tube, are arranged such that hydrogen gas is ejected from one of the outer tubes and the inner tubes and oxygen gas is ejected from the other tubes, and the injection port of each injection nozzle is located on the injection surface. Each injection nozzle includes at least one main injection nozzle having an inner tube formed to spread toward the injection surface side, and another sub-injection nozzle arranged around the main injection nozzle, wherein gas is injected from the inner tube of the main injection nozzle under a higher pressure state as compared with gas injected from the sub-injection nozzle.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: April 16, 2013
    Inventors: Osamu Hirota, Yoshinari Kato, Toshihiko Ando
  • Patent number: 8408197
    Abstract: A burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: April 2, 2013
    Assignee: Corning Incorporated
    Inventor: Curtis Richard Cowles
  • Publication number: 20130071796
    Abstract: An oxy-fuel burner arrangement having a first conduit having a nozzle aperture with an aspect ratio, D1/D2, of greater than or equal to about 2.0. The first conduit is arranged and disposed to provide a first fluid stream, where the first fluid stream is a combustible fuel. The burner arrangement further includes at least one second conduit arranged and disposed to provide a second gas stream circumferentially around the first fluid stream, where the second gas stream includes oxygen. A precombustor is arranged and disposed to receive the first fluid stream and second gas stream where an oxy-fuel flame is produced. The geometry of the nozzle aperture and the cross-sectional geometry of the first conduit are dissimilar.
    Type: Application
    Filed: March 9, 2012
    Publication date: March 21, 2013
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Jeffrey D. Cole, Leighta Maureen Johnson, Louis Walter Monroig, Aleksandar Georgi Slavejkov
  • Patent number: 8393893
    Abstract: In order to provide a rotary-furnace burner in which the quantity fraction of cost-effective particulate secondary fuels to be used as energy carriers can be increased and the configuration of the burner flame can be influenced, even during the operation of the burner, it is proposed, according to the invention, to arrange an expansion chamber open towards the burner mouth and having a widened cross section, as compared with the tube or individual tubes in the burner in front of the issue of the tube or tubes for blowing out the secondary fuels, and to make the axial length and the volume of the expansion chamber variable, during the operation of the burner, by means of the axial displacement of the secondary-fuel tubes, so that the particulate secondary fuel particles blown out at the burner mouth with a considerably reduced velocity do not fly past the burner flame, but, instead, burn out in the flame.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: March 12, 2013
    Assignee: KHD Humboldt Wedag GmbH
    Inventors: Ernst Schröder, Alexander Knoch
  • Patent number: 8353698
    Abstract: A coaxial injection device for injecting and dispersing reagents into a reactor, including an exterior duct for high-velocity gas injection; an outer-middle injector with at least one nozzle for liquid injection; an inner-middle duct for low-velocity gas injection; and an interior injector with nozzle for liquid injection; wherein, the exterior duct is formed by the internal wall of an insert and the external wall of the outer-middle injector; and is located externally to and circumferentially surrounds all other injectors and ducts; the outer-middle injector is formed by two concentric cylinders with end plate and injector nozzles; the inner-middle duct is formed by interior wall of the outer-middle injector and the exterior wall of the interior injector; the interior injector is formed by a cylinder with an endplate, the endplate having a nozzle; thereby ensuring the mixing and dispersion of the liquids and gases into the reactor to increase reaction homogeneity, reaction efficiency, reactor efficiency and
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: January 15, 2013
    Assignee: Nalco Mobotec, Inc.
    Inventor: Goran Moberg
  • Patent number: 8292615
    Abstract: A method for burning gas in a burner, including leading the gas through an inner fuel tube and introduction of combustion air through an annular space surrounding the inner fuel tube. This space forms of an outer tube terminated by a conically converging section, wherein the end of the inner fuel tube forms a burner head. The major part of the primary gas is introduced into the upstream end of the burner head, to go into the combustion air that flows past the burner head, whereas a smaller part of a secondary gas is introduced into the free end of the burner head and into the constricted part of the annular channel that surrounds the burner head. The gas flow is accelerated past the burner head due to the reducing cross section and is burned downstream in relation to the burning head.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: October 23, 2012
    Assignee: Norwegian University of Science and Technology (NTNU)
    Inventors: Øystein Spangelo, Otto Kristian Sonju, Torbjorn Slungaard, Mario Ditaranto
  • Publication number: 20120192773
    Abstract: A burner and method for oxidizing solid fuels wherein the burner has a lance having one or more nozzle feeds and one or more nozzle outlets concentrically surrounded by a primary oxidant passage which is concentrically surrounded by a secondary oxidant passage wherein the primary and secondary oxidant passages communicate at their proximal ends with a gas supply, the lance having a distal and proximal end and the one or more nozzle feeds is in communication with a gas supply.
    Type: Application
    Filed: August 1, 2011
    Publication date: August 2, 2012
    Inventors: Donald P. Satchell, JR., Andrew P. Richardson, Ian Hibbitt
  • Patent number: 8215950
    Abstract: A burner tube to provide combustible materials to a combustor is provided and includes an annular shroud and a center body, having a cavity defined therein, disposed within the annular shroud to form an annular passage, the annular passage being communicable with a combustion zone of the combustor at an aft portion thereof and including a fore portion in which fuel is injected into the annular passage. The center body includes a surface having a passage defined therein through which air is to be supplied to the annular passage from the cavity at a position, which is downstream from the fuel injection and upstream from the combustion zone. Also provided is a contouring of the centerbody.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: July 10, 2012
    Assignee: Genral Electric Company
    Inventors: Ramanand Singh, Atul Kumar Vij, Chetan Babu Velkur
  • Patent number: 8206149
    Abstract: A description is given of a burner for introducing solid, liquid or gaseous fuel into the burning zone of a kiln, such as rotary kiln for manufacturing cement clinker or “similar materials, said burner comprising a burner pipe (1) which encircles a number of ducts for conveying fuel and combustion air through the burner. The burner is characterized in that the burner pipe (1) is made up of modules (1a, 1b) which are fixed to another by fixing means (9) which will allow non-destructive assembly and disassembly of the modules. Hereby is obtained a burner in which it will be possible in a simple and non-destructive manner to disassembly the burner pipe (1) in modules (1a, 1b) in direction from the free end of the burner (7) or the burner tip.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: June 26, 2012
    Assignee: Flsmidth A/S
    Inventors: Ib Ohlsen, Lars Skaarup Jensen, Erik Jepsen, Ejvind Rödtnes Jörgensen
  • Patent number: 8186423
    Abstract: An apparatus for cooling a hot gaseous medium includes a vessel, wherein a bundle of pipes is disposed in a coolant compartment, and wherein a liquid coolant flows around the bundle. The pipes are mounted near upstream ends in a thermal shield and extend through openings in a support plate mounted at a distance from the thermal shield defining a front space between the thermal shield and the support plate in the vessel separated from the coolant compartment. The apparatus permits addition of liquid coolant to the front space. The openings in the support plate are larger than the pipes, defining an annular space. Liquid coolant flows co-current with the hot gaseous medium in the pipes from the front space to the coolant compartment. A skirt type extension surrounds the pipe in the front space to the support plate and having an opening at the thermal shield.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: May 29, 2012
    Assignee: Shell Oil Company
    Inventors: TeckSoon Lau, Tycho Agien Van Der Plas, Edwin Bernardus Wilhelmus Gerardus Voeten
  • Patent number: 8172566
    Abstract: An apparatus for combustion of a liquid fuel, such as an atomizer or burner, and an associated method using the apparatus for combusting an atomized liquid fuel. The apparatus for combustion has an outer conduit, an inner conduit and a spray tip. The spray tip has a mixing chamber for receiving a liquid fuel and an atomizing gas, and an orifice for discharging the liquid fuel and atomizing gas mixture as an atomized liquid fuel. The inner conduit has external fins where at least some of the external fins contact the inner surface of the spray tip.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: May 8, 2012
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Matthew James Watson, Xiaoyi He
  • Publication number: 20120070788
    Abstract: Disclosed is an eccentric jet type low NOX oxyfuel burner for gaseous fuel, which freely controls the shape of a flame and a combustion characteristic by using an eccentric injection nozzle. The disclosed oxyfuel burner reduces an optimum mixture rate forming area in comparison with a conventional coaxial-injection, and enlarges a thin fuel area and an excessive fuel area so that partial generation of a flame with a high temperature is restricted. Therefore, an amount of generated nitrogen oxide can be minimized and the stability of a flame can be significantly improved. Particularly, the oxyfuel burner combines a fuel nozzle and an oxygen combustion nozzle having different diameters so as to use them so that it is very simple and practical to design and manufacture the oxyfuel burner.
    Type: Application
    Filed: September 20, 2010
    Publication date: March 22, 2012
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Dong-Soon Noh, Eun-Kyung Lee, Chang-Bok Ko
  • Publication number: 20120037054
    Abstract: A burner for introducing solid particulate fuel to a burning zone of a kiln such as a rotary kiln for manufacturing cement clinker or similar material includes a centrally located duct for conducting solid fuel to an inlet opening and at least one duct for conducting primary air to one or more annular nozzles surrounding the inlet opening of the centrally located duct. The centrally located duct for conducting solid fuel is arranged so that the direction of introduction of the fuel relative to the longitudinal axis of the burner and consequently the direction of introduction of the primary air may be adjusted continuously during operation of the burner.
    Type: Application
    Filed: April 23, 2010
    Publication date: February 16, 2012
    Applicant: FL SMITH A/S
    Inventor: Ib Ohlsen
  • Patent number: 8113824
    Abstract: A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: February 14, 2012
    Inventors: Hamid Sarv, Albert D. LaRue, William J. Kahle, Alan N. Sayre, Daniel R. Rowley
  • Patent number: 8113821
    Abstract: A burner assembly for lean, low NOx combustion may include a gaseous fuel manifold, counter-swirl vanes, and a converging nozzle with bluff body flame anchors. A cooling air tube optionally extends from the air inlet to the nozzle.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: February 14, 2012
    Assignee: Hauck Manufacturing Company
    Inventors: James J. Feese, Bruce A. Wartluft, Jacob W. Mattern
  • Publication number: 20120009532
    Abstract: 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: Application
    Filed: July 31, 2010
    Publication date: January 12, 2012
    Inventors: Rajeev S. Prabhakar, Remi Pierre Tsiava, Magnus Mortberg, Benoit Grand, Bertrand Leroux, Vivek Gautam
  • Publication number: 20120009531
    Abstract: 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: Application
    Filed: July 31, 2010
    Publication date: January 12, 2012
    Applicants: 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, Vivek GAUTAM, Benoit GRAND, Bertrand LEROUX
  • Patent number: 8092213
    Abstract: In a flame arrester insert comprising two metal strips (1, 2) wound together, of which a first metal strip (1) is a smooth strip and the second metal strip (2) is a grooved strip having defined grooving, so that they rest on each other at defined contact points (3) and, between the contact points (3), form defined gaps (4) for the passage of a fluid, the stability can be increased and corrosion prevention can be implemented even with inexpensive materials by the metal strips (1, 2) resting directly on each other at the contact points (3) and, outside the contact points (3), having a surface coating (5) which, close to the contact points, is a uniform joint coating of the surfaces of the metal strips (1, 2) that point toward each other.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: January 10, 2012
    Assignee: Leinemann GmbH & Co. KG
    Inventor: Christoph Leinemann