Having Secondary Air Mixing Means Patents (Class 110/265)
  • Patent number: 9921092
    Abstract: A method for determining one or more fluid flow parameters for a fluid flowing within a pipe is provided. The fluid is a mixture of solid particles and gas. The method includes the steps of: a) providing a meter operable to determine the velocity of the fluid flow through the pipe, which meter is substantially insensitive to the particulate/gas mass ratio of the fluid flow; b) determining the velocity of the fluid flow within the pipe using the meter; and c) determining a particulate/gas mass ratio using a density value for the gas within the flow and the determined fluid flow velocity.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: March 20, 2018
    Assignee: CIDRA CORPORATE SERVICES, INC.
    Inventors: Daniel L. Gysling, Douglas H. Loose
  • Publication number: 20150068437
    Abstract: A burner has a fuel/oxidant nozzles and a pair of dynamical lances spaced on either side thereof that inject a jet of fuel and primary oxidant along a fuel injection axis, and jets of secondary oxidant, respectively. Jets of actuating fluid impinge against the jets of secondary oxidant to fluidically angle the jets of secondary oxidant away from the fuel injection axis. The action of the angling away together with staging of the oxidant between primary and secondary oxidant injections allows achievement of distributed combustion conditions.
    Type: Application
    Filed: November 6, 2014
    Publication date: March 12, 2015
    Inventors: Taekyu KANG, Vivek GAUTAM, Rajeev S. PRABHAKAR, Benoit GRAND, Bertrand LEROUX, Magnus MORTBERG, Nicolas DOCQUIER
  • Publication number: 20150068438
    Abstract: A biomass-mixed, pulverized coal-fired burner is provided. The biomass-mixed, pulverized coal-fired burner is 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 pulverized coal fuel jet nozzle that surrounds the biomass fuel jet nozzle; a secondary air nozzle that surrounds the pulverized coal fuel jet nozzle; and a tertiary air nozzle that surrounds the secondary air nozzle. A biomass fuel stream is jetted into an inside of a pulverized coal fuel flame formed in a furnace, the flame offering favorable ignition and flame holding performance.
    Type: Application
    Filed: March 21, 2013
    Publication date: March 12, 2015
    Inventors: Koji Taniguchi, Atsunori Kato, Suguru Yabara, Yutaka Tanabe
  • Publication number: 20150053124
    Abstract: 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: Application
    Filed: March 21, 2013
    Publication date: February 26, 2015
    Inventors: Koji Taniguchi, Atsunori Kato, Suguru Yabara, Yutaka Tanabe
  • Publication number: 20150041718
    Abstract: The invention is directed to a burner for the gasification of a solid fuel, comprising a burner front having an opening for discharging a solid fuel, wherein the opening for discharging the solid fuel is fluidly connected to a central passage way and wherein the central passage way has a downstream part wherein the diameter of the passage way increases over a first length and subsequently decreases over a second length terminating at the burner front and wherein inside the downstream part of the central passage way a hollow member is positioned, and wherein the hollow member has an internal increasing diameter and inner decreasing diameter aligned with the increasing and decreasing diameter of the hollow member and wherein the connecting conduits have a discharge opening positioned in the diverging part of the hollow member.
    Type: Application
    Filed: September 26, 2011
    Publication date: February 12, 2015
    Applicant: SHELL OIL COMPANY
    Inventors: Johannes Hermanus Maria Disselhorst, Franciscus Gerardus Van Dongen
  • Patent number: 8950345
    Abstract: A pulverized coal burner and a pulverized coal boiler. The coal burner comprises a primary air cylinder (111) and a pulverized coal concentration device (112). The coal concentration device (112) makes the concentration of the coal flow gradually decrease from inside to outside along the radial direction, with respect to an axis (100) of the primary air cylinder (111). The coal burner further comprises a coal separating cylinder (113) and a coal guiding cylinder (114) located downstream of the device (112), the rear end of the cylinder (113) is connected with the front end of the coal guiding cylinder (114). The outlet of the cylinder (114) has a conical expansion portion (1141). The coal burner further comprises a divergent nozzle (115) connected with the rear end of the primary air cylinder (111) and whose cross-sectional area gradually increases along the flow direction of the coal flow.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: February 10, 2015
    Assignee: Yantai Longyuan Power Technology Co., Ltd.
    Inventors: Yupeng Wang, Hong Tang, Yuwang Miao, Wucheng Liu, Jingwu Zhang, Yubin Zhang, Shuweng Sun, Xingyuan Cui, Xixin Yang, Xinguang Wang, Zeru Gong, Lei Yi, Yingtao Wang
  • Publication number: 20140373763
    Abstract: The present disclosure relates to a center air jet burner for burning low quality fuel including an annular pipe having a fuel inlet and a fuel outlet. A core pipe that includes a first opening and an opposite second opening that defines an inner zone, the core pipe extends within the annular pipe defining a first annular zone. A burner elbow is configured to supply a fuel airflow mixture including pulverized coal and primary air to the fuel inlet and the first opening. The first opening of the core pipe is eccentrically aligned relative to the fuel inlet of the annular pipe such that the fuel airflow mixture passing through the burner elbow is divided into an outer fuel rich stream having an increased amount of pulverized coal within the first annular zone and an inner fuel-lean stream having an increased amount of primary air within the inner zone.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Albert D. LaRUE, Zumao CHEN, Keir D. McQUISTAN
  • Publication number: 20140356793
    Abstract: A regenerative oxidant preheater internal arrangement, including a system and method for use thereof, utilizing a unique recycle oxy-combustion methodology which includes at least two primary combustion oxidant sectors placed adjacent to both the flue gas side as well as a secondary oxidant sector positioned between the two primary sectors. A tri-sector regenerative oxidant preheater apparatus, method and arrangement for utilization with oxy-fired pulverized coal combustion power plants.
    Type: Application
    Filed: August 18, 2014
    Publication date: December 4, 2014
    Inventors: Dennis K. McDonald, Kiplin C. Alexander, David L. Kraft
  • Publication number: 20140356795
    Abstract: An oil-fired burner (30A) for warming, disposed adjacent to the outer periphery of a pulverized coal burner which inputs pulverized coal and air into a furnace, includes: an oil gun (32) for inputting an oil fuel disposed at the center of an outlet opening of a nozzle main body (31) substantially rectangular in cross-section; and a secondary air input port (40) disposed so as to surround the outer periphery of the oil gun (32), wherein the secondary air input port (40) is constituted of: a central arc section (41) substantially similar in shape to a circular diffuser (34) mounted on the leading end side of the oil gun (32); and rectangular sections (42L, 42R) provided continuously from both sides of the central arc section (41) and narrowed in face-to-face dimension in the direction of the adjacent pulverized coal burners so as to increase the distance from them.
    Type: Application
    Filed: October 31, 2012
    Publication date: December 4, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
  • Publication number: 20140305356
    Abstract: A wide-flame solid fuel/oxygen burner including a fuel nozzle having an aspect ratio of at least about 2 defined by the ratio of a fuel nozzle width, W, measured along a major axis centerline, to a fuel nozzle height, H, measured along a minor axis centerline, and long walls spaced substantially symmetrically from the major axis centerline, the fuel nozzle having an inlet width, WN; and a pair of guide vanes positioned on either side of the major axis centerline between that centerline and an adjacent long wall, the guide vanes diverging from the major axis centerline in the flow direction by an angle such that the guide vanes are closer together at an upstream end and farther apart at a downstream end, thereby forming a central diffuser between the guide vanes and an outer converging nozzle between each guide vane and one of the long walls.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 16, 2014
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Stephane Bernard Poussou
  • Publication number: 20140305355
    Abstract: A solid fuel/oxygen burner including a central oxygen conduit extending toward a tip end of the burner, an outer fuel conduit surrounding the oxygen conduit, an inner fuel conduit positioned between the oxygen conduit and the outer fuel conduit to form an inner annulus in conjunction with the oxygen conduit and an outer annulus in conjunction with the outer fuel conduit, the inner fuel conduit having an outlet end upstream of the tip end, a truncated conical divider within the outer fuel conduit surrounding the oxygen conduit downstream of the inner fuel conduit for dividing a fuel stream in the outer fuel conduit into an inner annular conical diffuser and an outer annular converging nozzle, and at least three radial guide vanes within the diffuser, wherein the outlet end of the inner fuel conduit is spaced apart from an inlet end of the divider by a distance, X.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 16, 2014
    Applicant: Air Products And Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Francis Anthony Milcetich
  • Publication number: 20140308620
    Abstract: The present invention relates to a pulverized coal fired boiler with wall-attachment secondary air and grid overfire air. Primary burners including primary air spouts, secondary air spouts and close coupled overfire air spouts arranged at intervals along the height direction of a hearth are arranged on four corners of the hearth. Two-way wall-attachment secondary air spouts and one-way wall-attachment secondary air spouts are arranged from bottom to top in a primary combustion zone where the primary burners are located. One-way wall-attachment secondary air spouts are arranged in a reduction zone between the primary burners and the top overfire air spouts, and grid overfire air spouts are arranged in a burnout zone where the overfire air is supplied.
    Type: Application
    Filed: January 15, 2013
    Publication date: October 16, 2014
    Applicant: YANTAI LONGYUAN POWER TECHNOLOGY CO., LTD.
    Inventors: Yuankai Deng, Yonghe Zhang, Ming Li, Bo Hou, Jinlei Cui, Tanrong Wei, Weiguo Rong, Lei Li, Guofeng Xu
  • Publication number: 20140290544
    Abstract: The invention relates to a pulverized coal burner for a steam generator. The pulverized coal burner has a fuel duct, through which pulverized coal is conveyed with the aid of a carrier gas. The pulverized coal emerges together with the carrier gas at a fuel duct outlet. The pulverized coal burner furthermore has at least one core duct and at least one secondary duct. Air or oxygen flows through the core duct and the secondary duct, emerging at the core duct outlet and at the secondary duct outlet. The core duct outlet, the secondary duct outlet and the fuel duct outlet together form a burner outlet. The pulverized coal burner has at least one plasma ignition torch embodied integrally with the pulverized coal burner. The outlet of the at least one plasma ignition torch is arranged in the plane of the burner outlet or offset downstream in relation to the direction of flow of the pulverized coal. The plasma flame produced by the plasma ignition torch is thus located outside the fuel duct.
    Type: Application
    Filed: June 17, 2014
    Publication date: October 2, 2014
    Inventors: Thomas WILD, Hellmuth BRUEGGEMANN
  • Publication number: 20140294695
    Abstract: An injector mixer for a gasification reactor system that utilizes reactants includes an injector body that extends between a first face and a second face. The injector body includes a first passage that extends between the first face and the second face and has a first central axis. At least one second, impinging passage extends between the first face and second face and has an associated second central axis that has an angle with the first axis. The angle satisfies mixing efficiency Equation (I) disclosed herein.
    Type: Application
    Filed: May 31, 2011
    Publication date: October 2, 2014
    Applicant: Aerojet Rocketdyne of DE, Inc.
    Inventors: Chandrashekhar Sonwane, Kenneth M. Sprouse
  • Patent number: 8820249
    Abstract: A burner having a secondary air regulator is provided. The secondary air regulator has an end plate having a bored hole penetrating in an axial direction and for forming a cylindrical space with peripheral surface opened in a space with the furnace core side surface of the wind box, a rotary damper having a bored hole penetrating in an axial direction and being capable to open or close the hole on the end plate by rotating in a peripheral direction, a sliding damper for surrounding the cylindrical space and being slidable in an axial direction, air vanes installed at a predetermined distance along circumference of the cylindrical space and for giving swirling to the secondary air, first driving means for rotating the rotary sliding damper, and second driving means for sliding the sliding damper.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: September 2, 2014
    Assignee: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8795602
    Abstract: In certain embodiments, a feed injector system includes an inner channel configured to convey at least one of a solid fuel feed or a liquid reactant or moderator to a reaction zone. A first oxidizer channel extends around the inner channel, wherein the first oxidizer channel is configured to convey a first oxidizer stream to the reaction zone. A second oxidizer channel extends around the first oxidizer channel, wherein the second oxidizer channel is configured to convey a second oxidizer stream to the reaction zone. Additionally, a third channel extends around the inner channel and the first and second oxidizer channels, wherein the third channel is configured to convey at least one of the solid fuel feed or the liquid reactant or moderator to the reaction zone.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: August 5, 2014
    Assignee: General Electric Company
    Inventor: Ali Ergut
  • Publication number: 20140202365
    Abstract: The invention relates to a combustion apparatus, in particular to a burner for the combustion of carbonaceous fuel.
    Type: Application
    Filed: August 17, 2012
    Publication date: July 24, 2014
    Applicant: DOOSAN BABCOCK LIMITED
    Inventors: David William Sturgeon, Gerard John Hesselmann
  • Patent number: 8726819
    Abstract: A burner is arranged axially of a burner throat on a furnace wall and includes a nozzle body housed in a wind box and with a secondary air adjuster on a leading end of the nozzle body. The adjuster includes an end plate for defining together with a near-furnace side surface of the wind box a cylindrical space opened in an outer circumference thereof, a slide damper axially slidable for surrounding the cylindrical space, air vanes arranged at predetermined intervals and circumferentially of the cylindrical space for swirling a secondary air and drive means and for slide movement of the slide damper.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: May 20, 2014
    Assignee: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8714096
    Abstract: A pulverized coal boiler of the present invention is structured so as to form, among upper and lower after-air nozzles, an opening serving as an outlet of the lower after-air nozzle positioned on the upstream side is formed in a rectangular shape, a cylindrical section for defining a minimum flow path area of combustion air flowing through a flow path of the after-air nozzle is installed inside of the lower after-air nozzles along the flow path of the lower after-air nozzle, and a swirl blade for giving a swirl force to the combustion air flowing through the flow path of the after-air nozzles is installed inside of the cylindrical section, and the flow path of the lower after-air nozzles is formed so that a flow path area of the flow path of the after-air nozzles through which the combustion air flows from a position where the cylindrical section is installed toward the opening of each of the lower after-air nozzles is expanded.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: May 6, 2014
    Assignee: Babcock-Hitachi K.K.
    Inventors: Akihito Orii, Hirofumi Okazaki, Yusuke Ochi
  • Publication number: 20140116359
    Abstract: A burner including a fuel-containing fluid supply nozzle which supplies a fuel-containing fluid, from a connecting part in a fluid transfer flow passage for transferring a fuel-containing fluid including a fuel and a medium for transfer of the fuel, toward an outlet part provided on a furnace wall surface. The nozzle in its cross section perpendicular to the direction of flow of the fluid has a rectangular, elliptical, or substantially elliptical form having major and minor axis parts from a connecting part in the fluid transfer flow passage toward the outlet part provided on the furnace wall surface. Further, the area of a cross section perpendicular to the direction of flow of the fluid is gradually increased from the connecting part in the fluid transfer flow passage toward the outlet part. Air supply nozzle(s) for supplying combustion air are provided on the outer peripheral part of the nozzle.
    Type: Application
    Filed: December 24, 2013
    Publication date: May 1, 2014
    Applicant: BABCOCK-HITACHI KABUSHIKI KAISHA
    Inventors: Kenji KIYAMA, Akira BABA, Takanori YANO, Osamu OKADA, Hirofumi OKAZAKI, Kouji KURAMASHI
  • Patent number: 8707877
    Abstract: Solid particulate fuels are combusted with a primary oxidant stream of industrially pure oxygen and a secondary oxidant stream of industrially pure oxygen optionally mixed with a portion of recycled flue gas. The fuel is conveyed with a carrier gas of air or recycled flue gas. An oxygen concentration out of the total amount of the fuel stream and the primary and secondary oxidant streams is 40-63% by mass or 47-70% by volume.
    Type: Grant
    Filed: June 5, 2011
    Date of Patent: April 29, 2014
    Assignees: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc.
    Inventors: Chendhil Periasamy, Yuan Xue, Taekyu Kang, Remi Pierre Tsiava
  • Patent number: 8701572
    Abstract: A nozzle tip [100] for a pulverized solid fuel pipe nozzle [200] of a pulverized solid fuel-fired furnace includes: a primary air shroud [120] having an inlet [102] and an outlet [104], wherein the inlet [102] receives a fuel flow [230]; and a flow splitter [180] disposed within the primary air shroud [120], wherein the flow splitter disperses particles in the fuel flow [230] to the outlet [104] to provide a fuel flow jet which reduces NOx in the pulverized solid fuel-fired furnace. In alternative embodiments, the flow splitter [180] may be wedge shaped and extend partially or entirely across the outlet [104]. In another alternative embodiment, flow splitter [180] may be moved forward toward the inlet [102] to create a recessed design.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: April 22, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: Richard E. Donais, Todd D. Hellewell, Robert D. Lewis, Galen H. Richards, David P. Towle
  • Patent number: 8689707
    Abstract: A replacement burner system which facilitates reduction of nitrous oxide produced during combustion of a fuel. The replacement burner system comprising a fuel supply duct having an inlet and an outlet with a fuel deflector located within the fuel supply duct to facilitate redistribution of a flow of the fuel. An adjustable coal nozzle is located within the fuel supply duct between the fuel deflector and the outlet. An exterior surface of the fuel supply duct supports an air swirling device, and the air swirling device obstructs between 65% and 75% of the transverse flow area, located between an exterior surface of the fuel supply duct and the inwardly facing surface of the venturi register, after the replacement burner system is accommodated within the windbox of a combustion boiler.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: April 8, 2014
    Assignee: Fuel Tech, Inc.
    Inventors: Peter D. Marx, Robert W. Pickering, Charles E. Trippel
  • Publication number: 20140076211
    Abstract: A burner is provided for gasifying powdered fuel with a free oxygen-containing oxidant at temperatures up to 1900° C. and pressures up to 10 MPa. The burner includes a powder burner part having an oxidant channel and a powdered fuel channel, and a central pilot burner part. An annular channel for the outflow of an inert medium is arranged at the burner mouth between the pilot burner part and the powder burner part.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Inventors: Dietmar Adler, Norbert Fischer, Manfred Jänig, Jürgen Noack, Manfred Schingnitz
  • Publication number: 20140065561
    Abstract: A tangentially-fired furnace for the burning of anthracite is disclosed. The furnace may contain a boiler with a chamber having four corners. Four burner groups located at the four corners may be configured to eject pulverized coal flow into the chamber for combustion, in order to form a single fireball substantially at the center of the chamber during combustion. Each burner group may contain a first burner which includes primary-air/rich-portion nozzles for ejecting rich-portion coal flow into a lower section of the chamber, and a second burner which includes primary-air/thin-portion nozzles for ejecting thin-portion coal flow into a higher section of the chamber.
    Type: Application
    Filed: March 17, 2013
    Publication date: March 6, 2014
    Inventors: Jianwen Zhang, Fei Chen, Gongquan Liu, Xiang Zhang
  • Patent number: 8661993
    Abstract: In an exhaust gas treatment system including a denitration device that removes nitrogen oxide in exhaust gas from a heavy fuel-fired boiler, an air preheater that recovers heat in the gas after the nitrogen oxide is removed, an electric precipitator that removes dust while adding ammonia into the gas after heat recovery, a desulfurization device that removes sulfur oxide in the gas after dust removal, and a stack that exhausts the gas after desulfurization to the outside, an ash-shear-force measuring instrument is provided to measure an ash shear force, which is ash flowability, on the downstream side of the electric precipitator, so that a feed rate of an air supply unit that supplies air to the boiler is reduced according to ash shear-force information.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: March 4, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Naoyuki Kamiyama, Tomoo Akiyama, Toshihiko Setoguchi, Koutaro Fujimura, Yoshihisa Yamamoto, Koichi Tagami, Yasutoshi Ueda
  • Publication number: 20140057217
    Abstract: A burner having a secondary air regulator is provided. The secondary air regulator has an end plate having a bored hole penetrating in an axial direction and for forming a cylindrical space with peripheral surface opened in a space with the furnace core side surface of the wind box, a rotary damper having a bored hole penetrating in an axial direction and being capable to open or close the hole on the end plate by rotating in a peripheral direction, a sliding damper for surrounding the cylindrical space and being slidable in an axial direction, air vanes installed at a predetermined distance along circumference of the cylindrical space and for giving swirling to the secondary air, first driving means for rotating the rotary sliding damper, and second driving means for sliding the sliding damper.
    Type: Application
    Filed: September 23, 2013
    Publication date: February 27, 2014
    Applicant: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8646394
    Abstract: A burner 15 where a secondary air regulator 36 is provided on a forward end of a nozzle main unit 16 to be installed along the central axis of a burner throat 13 being installed on a furnace wall 12 and to be accommodated in a wind box 14, wherein the secondary air regulator has an end plate 37 having a bored hole 38 penetrating in an axial direction and for forming a cylindrical space 48 with peripheral surface opened in a space with the furnace core side surface of the wind box, a rotary damper 42 having a bored hole 45 penetrating in an axial direction and being capable to open or close the hole on the end plate by rotating in a peripheral direction, a sliding damper 52 for surrounding the cylindrical space and being slidable in an axial direction, air vanes 46 and 47 installed at a predetermined distance along circumference of the cylindrical space and for giving swirling to the secondary air 34, first driving means 54, 56 and 44 for rotating the rotary sliding damper, and second driving means 53 and 55 f
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: February 11, 2014
    Assignee: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Publication number: 20140038115
    Abstract: The invention discloses a dense/dilute pulverized coal separator structure of a single-fireball octagonal direct-flow burner, of which a boiler body is provided with eight burner groups, each water cooled wall is provided with two burner groups respectively, each of the burner groups comprises multiple nozzles toward the same burner, and center lines of all nozzles on the eight burner groups form an imaginary tangent circle in a furnace along the same tangential direction.
    Type: Application
    Filed: February 16, 2012
    Publication date: February 6, 2014
    Inventors: Fei Chen, Jianwen Zhang, Kun Xiao, Jiangtao Li
  • Publication number: 20140011141
    Abstract: Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.
    Type: Application
    Filed: March 7, 2012
    Publication date: January 9, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
  • Publication number: 20130319299
    Abstract: In a boiler, a heat exchanger provided in one of two flow paths formed by partitioning a downstream portion of a flow path for exhaust gas discharged from a furnace has a smaller total heat transfer area than a heat exchanger provided in the other of the two flow paths; the exhaust gases discharged from the flow paths to outside the boiler are introduced, without being mixed, into an air heater downstream of the boiler; and, in the air heater, the heat of the exhaust gases is transferred to the primary air and the secondary air so as to heat combustion air.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 5, 2013
    Applicant: Hitachi, Ltd.
    Inventors: Masato HANDA, Yoshiharu HAYASHI, Tsuyoshi SHIBATA
  • Publication number: 20130305971
    Abstract: A burner for powdered and/or particulate fuels having a flow channel for transporting at least one gas stream into a combustion chamber, wherein the flow channel has an annular cross section and a swirl device imparting a swirl to the gas stream in a circumferential direction. The swirl device has at least a first and a second group of deflection means to generate the swirl, that at least the second group of deflection means is attached in a fixed manner to supporting structure that is axially displaceable along the flow channel and/or can be rotated about the longitudinal axis of the flow channel in order to alter the swirl.
    Type: Application
    Filed: April 23, 2013
    Publication date: November 21, 2013
    Applicant: Babcock Borsig Steinmueller GmbH
    Inventor: Babcock Borsig Steinmueller GmbH
  • Publication number: 20130305968
    Abstract: The burner device for high-temperature air combustion according to the present invention is equipped with a thermal insulation portion (5) that is provided facing a furnace (1) and has a throat (6); a burner nozzle (9) that is provided at the axial center of this throat and that injects a pulverized coal mixed flow (38) into the furnace through the throat; a windbox (8) that is provided so as to house this burner nozzle; an air register (16) that is provided at the distal end of the burner nozzle and that injects low-temperature secondary air from the windbox to the throat; a high-temperature air nozzle (23), one end of which opens into the furnace through the heat insulation portion; and a combustion air switching means (16, 24) that switches between injecting low-temperature secondary air to the throat through the air register and injecting high-temperature secondary air to the furnace interior through the high-temperature air nozzle, in which in steady combustion, low-temperature secondary air is injected
    Type: Application
    Filed: January 27, 2012
    Publication date: November 21, 2013
    Inventors: Masato Tamura, Takahiro Kozaki
  • Publication number: 20130298465
    Abstract: To provide a pulverized-coal supply system for a coal gasification furnace in which the consumption of inert gas (the amount used) can be reduced. The pulverized-coal supply system is equipped with a pulverized-coal supply hopper (3) that receives pulverized coal pulverized by a coal pulverizer (1); a first pressure tank (31) that, when the pulverized-coal supply hopper (3) receives the pulverized coal, temporarily recovers part of inert gas filled in the pulverized-coal supply hopper (3) and supplies the recovered inert gas into the pulverized-coal supply hopper (3), whose interior is in an atmospheric pressure state; and a second pressure tank (32) filled with inert gas having a pressure necessary for increasing the inner pressure of the pulverized-coal supply hopper (3) to a predetermined pressure.
    Type: Application
    Filed: February 20, 2012
    Publication date: November 14, 2013
    Inventors: Tetsuya Kizu, Naoshige Yoshida
  • Publication number: 20130291772
    Abstract: An oxygen combustion system includes a boiler to burn fuel using combustion gas composed of oxygen-rich gas and circulating flue gas, a dust remover disposed in a flue through which flue gas discharged from the boiler flows, a second flue leading the combustion gas to the boiler, the combustion gas being made by mixing the circulating flue gas extracted downstream of the dust remover with the oxygen-rich gas, a combustion gas heater exchanging heat between the flue gas flowing between the boiler and dust remover and the combustion gas flowing through the second flue, and a flue gas cooler disposed between the heater and the dust remover to cool the flue gas. A control unit controls at least one of a flow rate and cooling medium temperature of the flue gas cooler such that temperature of the flue gas introduced into the dust remover will be between 90° C. and 140° C.
    Type: Application
    Filed: September 30, 2011
    Publication date: November 7, 2013
    Applicant: BABCOCK-HITACHI KABUSHIKI KAISHA
    Inventors: Toshihiko Mine, Kenji Kiyama, Koji Kuramashi, Kenichi Ochi, Hirofumi Okazaki
  • Patent number: 8561554
    Abstract: To provide a burner structure in which a burner is capable of highly precisely controlling the flow rate of the air for combustion within itself. An air flow passage (11) in a wind box (12) for injecting the air for combustion into a furnace (1) has a bent portion (13) just before joining with the furnace, and one or a plurality of guide vanes (14) are provided in the air flow passage (11) in the bent portion (13), and also in the bent portion (13), a drift control damper (16) is provided for varying the ratio of flow passage resistances of each of the air flow passages (11) divided by the guide vanes (14).
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 22, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Ryuhei Takashima, Takuichiro Daimaru, Shinya Hamasaki
  • Patent number: 8561553
    Abstract: A solid fuel nozzle tip for issuing a flow of mixed solid fuel and air into a boiler or furnace includes an outer nozzle body having an outer flow channel extending therethrough from an inlet to an outlet of the outer nozzle body. An inner nozzle body has an inner flow channel extending therethrough from an inlet to an outlet of the inner nozzle body. The inner nozzle body is mounted within the outer nozzle body with the inner flow channel inboard of and substantially aligned with the outer flow channel. The inner and outer nozzle bodies are joined together so as to accommodate movement relative to one another due to thermal expansion and contraction of the outer and inner nozzle bodies.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: October 22, 2013
    Assignee: Babcock Power Services, Inc.
    Inventors: Gregory L. Morse, Ivo Slezak, Paulo Cavalcanti
  • Publication number: 20130269577
    Abstract: 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 fuel supply tube 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 through oxygen-injection holes formed in the fuel supply tube and then mixes with fluidized, pulverized, solid fuel passing through the fuel supply tube to create an oxygen-fuel mixture in a downstream portion of the fuel supply tube. This mixture is discharged into the flame chamber and ignited in a flame chamber to produce a flame.
    Type: Application
    Filed: June 11, 2013
    Publication date: October 17, 2013
    Inventor: Curtis L. TAYLOR
  • Publication number: 20130255547
    Abstract: A pulverized coal-fired boiler efficiently supplies air to a central part of a furnace and the neighborhood of a furnace wall, thereby promoting mixture with combustion gas, and reducing both NOx and CO. The main after air ports are structured so as to jet air having a large momentum for enabling arrival at the central part of the furnace, and the sub-after air ports are structured so as to jet air having a small momentum to the neighborhood of the wall face of the furnace, and a sectional center of each of the sub-after air ports is within a range from 1 to 5 times of a caliber of the main after air ports from a sectional center of each of the main after air ports.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 3, 2013
    Applicant: BABCOCK-HITACHI K.K
    Inventors: Yuki KAMIKAWA, Masayuki TANIGUCHI, Hisayuki ORITA, Hironobu KOBAYASHI, Akira BABA, Toshihiko MINE, Shinichirou NOMURA, Noriyuki OOYATSU, Satoshi TADAKUMA, Hidehisa YOSHIZAKO, Hiroaki KANEMOTO, Kouji KURAMASHI, Akihito ORII, Shinji TSUDA, Hirofumi OKAZAKI, Takanori YANO, Katsumi SHIMOHIRA
  • Patent number: 8480769
    Abstract: Disclosed is a cyclonic gasifier and cyclonic gasification method. The cyclonic gasifier and cyclonic gasification method involve a chamber having a first portion proximal to a first end and a second portion proximal to a second end, introducing a first fuel to the first portion of the chamber, introducing a second fuel to the chamber; and introducing a first oxidant to accelerate the velocity of the first fuel and swirl the first fuel from the first portion toward the second portion.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 9, 2013
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Mark Daniel D'Agostini
  • Patent number: 8470290
    Abstract: This application concerns methods and apparatus for use in industrial waste recovery operations such as recovery of non-consumed chemicals in industrial processes, with recovery of quick lime in a wood pulp process being an example. In some embodiments, methods comprise baking lime sludge in a kiln and controlling a temperature in a calcining zone of the kiln to be above about 2250° F. to vaporize sodium contained in the lime sludge. Interaction of the vaporized sodium with SOx can deter accumulation of one or both of CaCO3 and CaSO4 on one or more inner surfaces of the kiln. In some embodiments, lime sludge can be rinsed to generate a filtrate comprising dissolved NaOH, and the filtrate can charge a scrubber for removing SOx from an exhaust from the kiln. Embodiments of co-fired burners for heating such kilns by burning petroleum coke and natural gas are also disclosed.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: June 25, 2013
    Assignee: Boise Packaging & Newsprint, L.L.C.
    Inventor: Stacy Miller
  • Patent number: 8454349
    Abstract: An improved burner and a method for combusting fuel used in furnaces such as those found in steam cracking. The burner includes a burner tube having a downstream end and an upstream end, a burner tip adjacent a first opening in the furnace, so that combustion of the fuel takes place at the burner tip, a lighting chamber adjacent to the first opening in the furnace, and a removable lighting chamber plug having a shape effective to substantially fill the lighting chamber when positioned within the lighting chamber.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: June 4, 2013
    Assignee: ExxonMobile Chemical Patents Inc.
    Inventors: George Stephens, David B. Spicer
  • Publication number: 20130112120
    Abstract: A dense phase swirl pulverized coal burner comprises a primary air channel, a direct flow secondary air channel and a outermost swirl secondary air channel; and multiple levels of pulverized coal concentration rings are arranged axially at intervals along the oil gun casing in a straight tube section of the primary air channel, so that pulverized coal air flow is distributed thickly outside and thinly inside the primary air nozzle. In the invention, dense phase pulverized coal outside the primary air nozzle passes through guide vanes, forms disturbed flow, is ejected into a furnace and mixes with high temperature backflow flue gas rapidly and sufficiently at an outlet. Meanwhile, dilute pulverized coal air flow at the center is ejected into the furnace by direct flow, ensuring subsequent mixing and combustion of pulverized coal flow.
    Type: Application
    Filed: February 16, 2012
    Publication date: May 9, 2013
    Inventor: Yuehua Li
  • Publication number: 20130098278
    Abstract: A pulverized coal burner and a pulverized coal boiler. The coal burner comprises a primary air cylinder (111) and a pulverized coal concentration device (112). The coal concentration device (112) makes the concentration of the coal flow gradually decrease from inside to outside along the radial direction, with respect to an axis (100) of the primary air cylinder (111). The coal burner further comprises a coal separating cylinder (113) and a coal guiding cylinder (114) located downstream of the device (112), the rear end of the cylinder (113) is connected with the front end of the coal guiding cylinder (114). The outlet of the cylinder (114) has a conical expansion portion (1141). The coal burner further comprises a divergent nozzle (115) connected with the rear end of the primary air cylinder (111) and whose cross-sectional area gradually increases along the flow direction of the coal flow.
    Type: Application
    Filed: April 26, 2011
    Publication date: April 25, 2013
    Applicant: YANTAI LONGYUAN POWER TECHNOLOGY CO., LTD
    Inventors: Yupeng Wang, Hong Tang, Yuwang Miao, Wucheng Liu, Jingwu Zhang, Yubin Zhang, Shuweng Sun, Xingyuan Cui, Xixin Yang, Xinguang Wang, Zeru Gong, Lei Yi, Yingtao Wang
  • Patent number: 8413595
    Abstract: In a boiler furnace having nozzles for introducing combustion media such as air and coal, nozzle tip walls that have the greatest exposure to radiant heat and hot gases are provided with arrays of air holes that allow air to flow to the exposed sides of the walls from the opposite sides in order to reduce the temperature difference between the two sides and thereby reduce thermal distortion and damage resulting from oxidation.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: April 9, 2013
    Assignee: R-V Industries, Inc.
    Inventor: John Grusha
  • Patent number: 8382468
    Abstract: Method for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (11), to be fed to an inlet opening (11a) in a burner device (10) having a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13). The first inlet (13a) for oxidant is caused to be arranged in the form of an opening surrounding the inlet opening (11a), in that the oxidant is caused to flow out through the opening (13a) with a velocity of at least 100 m/s, through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe (16) and out through the burner orifice (17).
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: February 26, 2013
    Assignee: AGA AB
    Inventor: Tomas Ekman
  • Publication number: 20130036955
    Abstract: A combustor for low quality fuels has a devolatilization chamber receiving the fuel and separating the fuel into char and gases. Char from the devolatilization chamber exits through a first port connected to a char chamber. The char chamber reduced the char to gases and ash. Gases generated in both the devolatilization chamber and char chamber are sent to gas and particulate combustion chamber, such as a fluidized bed. The various stages are operated at the optimum temperatures for the contituents provided to that stage. The resulting process has reduced emissions.
    Type: Application
    Filed: August 9, 2012
    Publication date: February 14, 2013
    Inventors: Howard E. Purdum, Williams L. Downs, Lawton V. Downs, Edward R. Sechrest, William J. Kadri
  • Publication number: 20120272875
    Abstract: Disclosed is a burner for particulate fuel, in particular made of biomass, with a primary tube and a core tube arranged in the primary tube. The primary tube and the core tube form a primary tube gap and the primary tube gap is configured to guide a flow of particulate fuel and gaseous combustion means from an inlet-side end to an outlet-side opening of the primary tube. In order to prevent the drawbacks occurring when using coarse-grain particles, preferably biomass, as a fuel for dust firing, or at least to reduce them without having to accept an increased outlay for equipment and/or additional energy losses, at least one device is provided for centring the flow within the primary tube in the region of the outlet-side end of the primary tube.
    Type: Application
    Filed: April 25, 2012
    Publication date: November 1, 2012
    Applicant: BABCOCK BORSIG STEINMULLER GMBH
    Inventors: Stefan Hamel, Christian Storm
  • Publication number: 20120255471
    Abstract: It is an object of the present invention to provide a solar boiler system that can suppress the installation cost for a solar heat collector and significantly improve gross thermal efficiency while minimizing a rise in air temperature resulting from the collected solar heat. The solar boiler system of the present invention includes a boiler for burning fossil fuel; a primary air system for pneumatically transporting pulverized fossil fuel to a burner attached to the boiler; a secondary air system for supplying preheated air for combustion to the boiler; and a secondary air superheater provided at the secondary air system, the secondary air superheater further superheating the preheated air for combustion with solar thermal energy.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 11, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Nobuyoshi MISHIMA, Takashi Sugiura, Toshihiko Sakakura
  • Publication number: 20120251959
    Abstract: A method of feeding at least one of light, fine and moist fuel into a furnace of a circulating fluidized bed boiler. Fuel is fed into the furnace through a fuel feed and the fuel is combusted in a turbulent, circulating fluidized bed. A fuel feed area is isolated from the turbulent circulating bed by arranging the fuel feed along at least one channel arranged in a wall of the furnace. Solids of the circulating bed material are introduced onto a first grid section at the bottom of the fuel feed area. The fuel and the solids are mixed and fluidized above the grid section to form a fuel-solids mixture that flows laterally onto a second grid section and a third grid section where the mixture is fluidized. The fluidized bed material is circulated both inside and outside of the furnace. The bed material is separated from the flue gases and returned to the furnace.
    Type: Application
    Filed: October 29, 2010
    Publication date: October 4, 2012
    Applicant: FOSTER WHEELER ENERGIA OY
    Inventors: Marcin Klajny, Pertti Kinnunen