Powdered Solid Fuel Patents (Class 110/261)
  • Patent number: 10571121
    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: February 25, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Anup Vasant Sane, Avishek Guha
  • Patent number: 10473400
    Abstract: There is provided a dispersion apparatus for use with a solid fuel burner. The dispersion apparatus comprises a passage through which particulate material may flow toward an outlet region for dispersal therefrom, the flow being at least in part rotational about the longitudinal axis of the passage. The dispersion apparatus also comprises a downstream guide means arranged within the passage at or near the outlet region, the downstream guide means configured to at least reduce the rotational motion so that the flow progresses toward the outlet region in a substantially uniform manner in a direction aligned with a longitudinal axis of the passage.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: November 12, 2019
    Assignee: Hatch Pty Ltd.
    Inventors: Wesley Adam Taylor, Matthew George White
  • Patent number: 10281434
    Abstract: A flame ionization detector has a combustion chamber with an electrode arrangement for measuring an electric current from a gas flame to an electrode of the electrode arrangement, a burner nozzle having at least one output-side outlet for ejecting a gas mixture to be ignited between the electrode arrangement and having at least one input-side inlet for feeding a hydrogen-containing combustible gas and a carbon-containing gaseous analyte through a transport channel to the outlet, and a feeder for feeding oxygen-containing combustion air into the combustion chamber, wherein at least one cut-out is provided in the burner nozzle, through which cut-out combustion air can pass from the combustion chamber into the gas mixture flowing out of the outlet.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: May 7, 2019
    Assignee: ABB SCHWEIZ AG
    Inventors: Julius Lippert-Gellissen, Matthias Graudenz, Paul Capek, Peter Schastok, Stefan Filip
  • Patent number: 10247702
    Abstract: In an embodiment, the present invention provides a burner nozzle for a flame ionization detector, the nozzle including: an output-side outlet for ejecting a gas mixture to be ignited into a combustion chamber; an input-side inlet for feeding a combustible gas and a gaseous analyte through a transport channel to the outlet; and a cut-out, provided in the burner nozzle, through which cut-out combustion air can pass from the combustion chamber into the gas mixture flowing out of the outlet.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: April 2, 2019
    Assignee: ABB SCHWEIZ AG
    Inventors: Julius Lippert-Gellissen, Matthias Graudenz, Paul Capek, Peter Schastok, Stefan Filip
  • Patent number: 10012382
    Abstract: A combustion system having a furnace defining a combustion chamber includes a first burner disposed at an upper elevation of the combustion chamber and a second burner and a third burner disposed at a lower elevation of the combustion chamber. A first duct extends vertically to convey therein a fuel flow of gas and pulverized fuel. A second duct branches from the first duct to the first burner to convey a first portion of the fuel flow, which is fuel lean, to define a fuel lean flow, wherein a second portion of the fuel flow passes through the first duct as a fuel rich flow. A third duct includes one end disposed longitudinally within the first duct. An impeller is disposed within the first duct upstream of the branching of the second duct and downstream of the one end of the third duct disposed in the first duct.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: July 3, 2018
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: Thomas Hilber, Bernd Greiner, Hans-Peter Schommer, Noel Francon, Helmut Jaiser
  • Patent number: 9848525
    Abstract: A particulate material delivery system for an agricultural implement including, an inductor box configured to receive particulate material from a tank, the inductor box including, an inductor segment comprising an air bypass channel extending through a particulate material supply chamber, wherein the particulate material supply chamber is configured to receive the particulate material for distribution to at least one row unit, and the air bypass channel is configured to guide airflow through the particulate material supply chamber without interacting with a flow of the particulate material through the particulate material supply chamber, and an airflow control device in communication with the inductor segment and configured to control the airflow through the air bypass channel.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 26, 2017
    Assignee: CNH Industrial America LLC
    Inventors: Chad M. Johnson, Frank C. Legner, III, Marvin A. Prickel, Michael J. Connors
  • Patent number: 9822967
    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: Grant
    Filed: May 3, 2016
    Date of Patent: November 21, 2017
    Assignee: Honeywell International Inc.
    Inventor: Curtis L. Taylor
  • Patent number: 9765967
    Abstract: A gas pipe ignitor for igniting a non-premixed air and fuel mixture includes a housing having an axially interior space along its length, a supply end segment, a flame end segment axially spaced from the supply end segment, and a flexible segment spaced between the supply end segment and the flame end segment. A fuel supply conduit extends axially within the housing, and the fuel supply conduit is operatively flexible with the flexible segment. An ignition conduit extends axially within the housing, and the ignition conduit is operatively flexible with the flexible segment. A detector conduit extends axially within the housing, and the detector conduit is operatively flexible with the flexible segment. An air supply conduit is operatively connected to the housing at the supply end segment and provides combustion air within the interior space.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: September 19, 2017
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: David C. Saunders, James P. Sutton, Rebecca Lynn Tobiasz, Gerard Chase
  • Patent number: 9702545
    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: Grant
    Filed: October 31, 2012
    Date of Patent: July 11, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
  • Patent number: 9562868
    Abstract: In a combustion experimental apparatus to obtain the positions of flames formed inside a tube (1), it is possible to adjust a temperature gradient in a longitudinal direction applied to the tube, by including a temperature-adjusting fluid supply device (2) to cause a temperature-adjusting fluid to flow along the tube.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: February 7, 2017
    Assignees: TOHOKU UNIVERSITY, IHI CORPORATION
    Inventors: Kaoru Maruta, Hisashi Nakamura, Soichiro Kato, Naoki Oikawa
  • Patent number: 9303221
    Abstract: A method of assembling an injection device for use in a reactor injector feed assembly includes extending the injection device at least partially into a cavity. The injection device includes a plurality of substantially concentric conduits coupled to a modular tip that includes a plurality of cooling channels and a plurality of substantially annular nozzles defined therein. The method also includes coupling at least one coolant distribution device in flow communication with the plurality of cooling channels to facilitate removing heat from an outer surface of the injection device.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: April 5, 2016
    Assignee: General Electric Company
    Inventors: Kenneth M. Sprouse, Shahram Farhangi, Robert M. Saxelby, David R. Matthews
  • Patent number: 9187335
    Abstract: A pulse jet system and method is disclosed. In an example, the pulse jet system includes a combustion chamber, intake ports to deliver combustion agents to the combustion chamber, an expansion chamber to cool a combustion product following combustion of the combustion agents in the combustion chamber, and an exhaust to exit the cooled gas from the expansion chamber. In another example, the pulse jet system includes a combustion chamber with intake ports to deliver combustion agents to the combustion chamber, wherein the combustion chamber is part of a four cycle engine. The pulse jet system also includes an expansion chamber to cool a combustion product following combustion of the combustion agents in the combustion chamber.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: November 17, 2015
    Assignee: Altmerge, LLC
    Inventor: Bruce H. Peters
  • Patent number: 9139788
    Abstract: A gasification system including a first feed line, a second feed line, a stabilization fuel line, and a fuel feed system controller including a processor. The processor is programmed to enable the stabilization fuel line to inject a stabilization fuel into a gasifier to initiate a stabilizer flame inside the gasifier, enable the first feed line to inject a dry fuel into the gasifier at a start-up dry fuel flow rate, increase the flow rate of the dry fuel from the start-up dry fuel flow rate to a normal operating condition (NOC) dry fuel flow rate, decrease a flow rate of the stabilization fuel as the flow rate of the dry fuel increases to the NOC dry fuel flow rate, and prevent the stabilization fuel line from injecting the stabilization fuel into the gasifier once the flow rate of the dry fuel is at the NOC dry fuel flow rate.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: September 22, 2015
    Assignee: General Electric Company
    Inventors: Steven Craig Russell, Ali Ergut, Jamal Abdul Ferguson
  • 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: 9016216
    Abstract: Methods of combustion include metering a substantially explosible powder into an oxidizing gas using a positive displacement powder dispersion device to suspend the powder in the gas and directing the powder in the gas to form a controlled stream of a moving explosible powder dispersion. In some embodiments, the method further includes igniting the dispersion with an ignition source to produce a stationary deflagrating combustion wave and sustaining combustion by continuing to meter the powder into the gas. In other embodiments, the method further includes adjusting a nozzle velocity of the dispersion to reflect properties of the dispersion to create a sustainable flame and igniting the dispersion to produce a stationary deflagrating wave of the dispersion. In other embodiments, the method further includes igniting the dispersion in a combustion area to produce a stationary deflagrating wave such that a conductive heat transfer from combustion brings the powder to combustion temperature.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 28, 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: 8955776
    Abstract: Disclosed herein is an apparatus and method of constructing a stationary wear-resistant stationary nozzle 200 and/or nozzle liner 230 for solid fueled furnaces. A transition section 210 is constructed from several flat pieces 211-218 several that may have identical starting shapes. This reduces manufacturing complexity and costs. All pieces 211-218 have a high-wear weld overlay on their inner surface 316, 416. Corner pieces 215-218 are folded into a corner shape at an outlet edge 412 and rolled into a curved shape at an inlet edge 411. Horizontal 211, 212 and vertical pieces 213, 214 are only rolled at an inlet edge 311. The pieces have seam tab 240 along longitudinal edges that are welded together to construct a transition section 210. The transition section 210 may be used as a liner to reduce wear in an existing stationary nozzle or may be constructed to be connected to an inlet piece 220 to form a strong, wear-resistant coal nozzle 200.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: February 17, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Daniel J. Adam, Paul M. Bovat, Jr., Thomas J. Campanelli, Kevin J. Grzebien, James P. Sutton
  • 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
  • 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
  • Publication number: 20140144353
    Abstract: The invention relates to a solid fired hot gas generator which comprises a plurality of solid burners for extending the regulating range, which form a multiple solid burner with an enlarged regulating range. A solid feed and a combustion air feed are assigned to each solid burner and with the aid of a dosing means a separate, dosed solid feed to each solid burner is guaranteed. The firing power of the multiple solid burner which is in particular a multiple impulse burner extends from the minimum power of one of the solid burners to the maximum power of all solid burners so that a regulation of all necessary load regions of a plant unit to be supplied is covered.
    Type: Application
    Filed: September 16, 2010
    Publication date: May 29, 2014
    Applicant: LOESCHE GMBH
    Inventors: Klaus Kasseck, Holger Wulfert, Andre Baetz
  • 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
  • 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: 8689710
    Abstract: A precombustor having a chamber having a first end and a second end, and an inlet configured to deliver a substantially parallel flow of solid fuel surrounded by oxygen at the first end. The first end further includes a recirculation step and the second end fluidly communicates with a furnace. The inlet and the recirculation step are arranged to form a recirculation zone of at least a portion of the solid fuel and the oxygen. A combustion system and method for operating a combustion system are also disclosed.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: April 8, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Aleksandar Georgi Slavejkov, Xiaoyi He, Mark Daniel D'Agostini, Reed Jacob Hendershot
  • 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
  • Patent number: 8689708
    Abstract: Method and device 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), where the burner device (10) includes 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 arranged in the form of a first opening arranged by the inlet opening, through which the oxidant is caused to flow out, 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 and out through the burner orifice (17), and water vapour is added to the oxidant before the oxidant reacts with the fuel.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: April 8, 2014
    Assignee: AGA AB
    Inventors: Tomas Ekman, Anders Lugnet
  • Patent number: 8682499
    Abstract: Embodiments of the present disclosure include devices and methods for controlling combustion air. For example, in one embodiment, a method for controlling combustion air includes determining an amount of leaking air in a boiler, determining a constant that depends on a heating value of a fuel in the boiler, and adjusting an amount of controlled air supplied to the boiler.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: March 25, 2014
    Assignee: Honeywell International Inc.
    Inventors: Daniel Pachner, Ondrej Basus
  • Patent number: 8667912
    Abstract: In a burner for highly caking coal in which a solid fuel channel that is attached penetrating through a surrounding wall of a gasifier for gasifying a highly caking solid fuel that has been pulverized into particles and that supplies the solid fuel into the gasifier by gas flow transportation, and a gasifying agent channel that supplies a gasifying agent into the gasifier are provided, a blockage detection unit that detects a blockage situation of the solid fuel channel is provided, and a process for reducing the temperature of the solid fuel is performed when the blockage detection unit detects a predetermined blockage situation.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: March 11, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshinori Koyama, Takeshi Aruga, Hiromi Ishii
  • Patent number: 8661992
    Abstract: An outer shroud for a solid fuel nozzle tip includes: an top shell portion and a bottom shell portion, each portion fabricated from a preform produced from a single sheet of flat stock and each shell portion including a forward area and a backward area and outlet sidewalls, wherein a right outlet sidewall and a left outlet sidewall are each separated from the forward area by a rounded corner; and a left inlet sidewall and a right inlet sidewall coupled to the top shell portion and the bottom shell portion.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: March 4, 2014
    Assignee: ALSTOM Technology Ltd
    Inventor: Jeffrey S. Mann
  • 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
  • Patent number: 8607716
    Abstract: In a burner for highly caking coal in which a solid fuel channel and a gasifying agent channel are provided in a double pipe structure, the temperature increase of the particles of a highly caking solid fuel and the resulting fusion and expansion of the particles are prevented or suppressed, thereby enabling a stable operation of the gasifier. In a burner for highly caking coal in which a solid fuel channel that is attached for gasifying a highly caking solid fuel that has been pulverized into particles and that supplies the solid fuel into the gasifier, and a gasifying agent channel that supplies a gasifying agent into the gasifier are provided in a double pipe structure, the burner has a triple pipe structure including a cooling water channel that circulates cooling water between the solid fuel channel and the gasifying agent channel, and the cooling water is recovered after use.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshinori Koyama, Takeshi Aruga, Hiromi Ishii, Kazuyuki Myoyo
  • Publication number: 20130319301
    Abstract: A spray nozzle is provided with upper and lower channels and from respective surfaces, the two channels form a cross shape, and become a fuel spray hole by communication of an intersecting part. A guide member is provided, in contact with the upstream-side channel, in a position overlapped with the intersecting part with respect to the spray direction of the spray nozzle. Spray fluid is branched with the guide member from the fuel fluid duct connected to the spray nozzle, passes through the upstream-side channel, to the intersecting part, and is sprayed. The spray fluid forms opposed flows toward the intersecting part in the upstream-side channel to collide with each other at an obtuse angle of 90° or greater, then is sprayed from the intersecting part, to form a thin fan-shaped liquid film. The liquid film is divided by a shearing force from the peripheral gas, atomized into spray particles.
    Type: Application
    Filed: January 12, 2012
    Publication date: December 5, 2013
    Applicant: Babcock-Hitachi K.K.
    Inventors: Hirofumi Okazaki, Koji Kuramashi, Hideo Okimoto, Akihito Orii, Kenichi Ochi
  • Patent number: 8584605
    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: Grant
    Filed: December 2, 2004
    Date of Patent: November 19, 2013
    Assignee: Maxon Corporation
    Inventor: Curtis L. Taylor
  • Publication number: 20130291770
    Abstract: A solid fuel burner and a combustion device using the solid fuel burner includes: a throat provided to the outer periphery of a fuel nozzle and injecting combustion gas into a furnace; a duct for delivering the combustion gas to the throat, the duct being provided with an inlet opening into which the gas is introduced from a direction perpendicular to the central axis of the nozzle and having a flow path formed so as to be bent at a right angle in the direction of the central axis of the nozzle; a damper provided in the duct; and a differential pressure detection device for detecting the difference between the pressure of the combustion gas flowing through the upstream portion of the duct and the pressure of the combustion gas flowing through the downstream portion of the duct. The damper is provided near and downstream of the inlet opening of the duct.
    Type: Application
    Filed: January 16, 2012
    Publication date: November 7, 2013
    Applicant: BABCOCK-HITACHI KABUSHIKI KAISHA
    Inventors: Jun Kashima, Hitoshi Okimura, Noriyuki Ohyatsu, Yusuke Ochi
  • 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
  • Patent number: 8555795
    Abstract: A pulverized coal concentrator for a pulverized coal burner, the concentrator is fixedly arranged inside the pulverized coal burner and comprises a front part (102) and a rear part (101), wherein the front part (1020 is designed as a bowl-shaped structure, for guiding and concentrating an air-pulverized coal flow, and the rear part (101) is designed as a cylinder-shaped structure, for maintaining a proper extension of the dense phase zone of the air pulverized coal flow. Also a pulverization coal burner is provided comprising the pulverized coal concentrator, in particular an internal combustion-type pulverized coal burner. The pulverized coal concentrator increases the adaptability of burner to coal quality, air velocity and pulverized coal density.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: October 15, 2013
    Assignee: Yantai Longyuan Power Technology Co., Ltd.
    Inventors: Changye Cheng, Jiaju Yang, Yi Li, Xingyuan Cui, Chaoqun Zhang, Zeru Gong, Guangquan Zhang, Yubin Zhang, Peng Liu
  • Publication number: 20130233212
    Abstract: A burner for a reaction furnace (12) including a fuel tube (2), an oxidizer tube (3) covering an outer periphery of the fuel tube, and a displacement absorbing member (7) provided on at least a part of the oxidizer tube. The fuel tube and the oxidizer tube have a proximal end fixed to a side wall of the reaction furnace and penetrating an outer vessel (11). The oxidizer tube is positioned with respect to the side wall of the inner vessel to suppress a length of a distal end of each of the oxidizer tube and the fuel tube projecting to an inside of the gasification furnace (10). Thermal stretching in an axial direction of the oxidizer tube is absorbed by the displacement absorbing member attached to the oxidizer tube.
    Type: Application
    Filed: March 30, 2012
    Publication date: September 12, 2013
    Inventors: Shinya Hamasaki, Jun Kasai, Satoshi Shimonokado, Keisuke Matsuo
  • Patent number: 8505496
    Abstract: A method of introducing oxygen into a boiler system for combustion with a prepared fuel in a furnace combustion chamber comprises providing a plurality of swirl-inducing elements to the air stream delivery lines, and a plurality of oxygen delivery jets adjacent the intake region and substantially surrounding the air stream delivery lines; igniting the fuel gas to create a flame; and delivering a stream of oxygen through the jets tangentially to the flame envelope to substantially shape and stabilize a swirling flow field for the flame, the oxygen concentration in the flame envelope gradually increasing towards an outer periphery of the flame envelope. A boiler system for using the method can be a new system or a retrofit to an existing system. The method and system provide advantages in reduced environmental impact and increased efficiency while addressing the safety factors involved in introducing oxygen to boiler systems.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: August 13, 2013
    Assignee: Her Majesty the Queen in Right of Canada as Represented by the Minister of Natural Resources
    Inventors: Mark Austin Douglas, Yewen Tan, Thomas Sellers, Eddy Chui, Adrian Majeski
  • Patent number: 8479668
    Abstract: A burner includes a primary air-coal mixture duct coaxially extended through a secondary air wind box, a pulverized coal separator supported within the primary air-coal mixture duct, a secondary air duct including an inner secondary air duct and an outer secondary air duct coaxially formed around the primary air-coal mixture duct, a primary air-coal mixture conical outlet coupled with the outlet of the primary air-coal mixture duct, and inner secondary air and outer conical outlets coupled with the outlets of the inner secondary air and outer secondary air ducts respectively. The conical outlets are arranged to delay the mixing time of the primary air-coal mixture and secondary air flows through the primary air-coal mixture and secondary air ducts and to prolong the residence time in the center recirculation zone under the reduction ability so as to effectively reduce the formation of NOx.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: July 9, 2013
    Assignee: Harbin Institute of Technology
    Inventors: Zhengqi Li, Zhichao Chen, Rui Sun, Shaozeng Sun, Shaohua Wu, Ming Qin, Hui Liu, Yunkun Qin
  • 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: 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: 8393065
    Abstract: A method for retrofitting a pulverized coal boiler in an air combustion boiler system is disclosed, which has a plurality of burners over a plurality of stages along the vertical direction on a wall surface of a furnace of the pulverized coal boiler and an after-air port for introducing air for two-stage combustion located above the burners to retrofit into a two-stage combustion pulverized coal boiler in an oxyfuel combustion boiler system.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: March 12, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuma Tatsumi, Masayuki Taniguchi, Tsuyoshi Shibata, Yoshiharu Hayashi
  • 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: 8302545
    Abstract: A combustion system for combusting air and fuel includes a primary combustion zone configured to produce combustion gases from the air and the fuel and an intermediate air zone downstream from the primary combustion zone. The intermediate air zone is configured to inject an intermediate air stream into the combustion gases. The combustion system further includes a burnout zone downstream from the intermediate air zone, wherein the burnout zone is configured to inject an overfire air stream into the combustion gases, and at least one hybrid-boosted air injector within at least one of the intermediate air zone and the burnout zone. The at least one hybrid-boosted air injector is configured to substantially simultaneously inject a boosted air stream and a windbox air stream into the combustion gases.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: November 6, 2012
    Assignee: General Electric Company
    Inventors: Larry William Swanson, Roy Payne, Quang H. Nguyen
  • Patent number: 8267020
    Abstract: An outer shroud for a solid fuel nozzle tip includes: an top shell portion and a bottom shell portion, each portion fabricated from a preform produced from a single sheet of flat stock and each shell portion including a forward area and a backward area and outlet sidewalls, wherein a right outlet sidewall and a left outlet sidewall are each separated from the forward area by a rounded corner; and a left inlet sidewall and a right inlet sidewall coupled to the top shell portion and the bottom shell portion.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: September 18, 2012
    Assignee: Alstom Technology Ltd
    Inventor: Jeffrey S. Mann
  • Patent number: 8220400
    Abstract: A method for extracting energy from biomass depleted of at least some carbohydrate, at least some oil, or both by a) introducing the biomass into a vertically elongated combustion chamber having i) at least one suspension burner at the top of the combustion chamber which is capable of projecting a flame down the axis of the combustion chamber, ii) a heat transfer apparatus having at least a portion of a heat collection surface located radially from the flame and below the burner, and iii) an exhaust opening located below the flame and below at least a portion of the heat collection surface; b) combusting the biomass to yield a mixture containing hot flue gas and molten ash above the exhaust opening; c) transferring heat from the hot flue gas to at least a portion of the heat collection surface substantially by radiation prior to any substantial contact of ash to a surface of the combustion chamber, to yield a mixture containing warm flue gas and non-molten ash and having a lower molten ash content than the mi
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: July 17, 2012
    Assignee: European Sugar Holdings S.A.R.L.
    Inventors: Raymond C. Ganga, Greg Imig, Blake McBurney, Robert Jansen, John Kerr, Steven J. Reust
  • Patent number: 8196531
    Abstract: Disclosed is a burner for oxidant gasification of pulverized fuels under high pressures, e.g. 80 bar, and temperatures, e.g. 1200 to 1900° C., in reactors with liquid slag removal for oxygen gasification. The individual pulverized coal supply tubes in the burner are inclined toward the burner axis in the direction of the burner mouth, are implemented equiareally from the burner inlet up to the burner outlet, and end at the burner mouth adjacent to the oxidant outlet. Owing to the pulverized fuel feeding elements being implemented right up to the burner mouth and the instantaneous entry of the pulverized coal into the rotating oxygen stream there is no longer any areal discontinuity at the dust outlet, since here the pulverized coal stream is immediately sucked into the oxidant stream. At the outlet of the media the individual pulverized coal streams merge into a single rotating pulverized coal/oxygen stream, thereby achieving an even flame spread and stabilization.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: June 12, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dietmar Degenkolb, Christian Reuther, Manfred Schingnitz
  • Patent number: 8176911
    Abstract: A method to regulate overfire air passing through an overfire air duct and entering a flue gas stream in a combustion system including: directing overfire air into an inlet of the overfire air duct, passing the overfire air through the duct and discharging the overfire air into the flue gas stream in the combustion system; adjusting a flow rate of overfire air entering the inlet using a damper adjacent the inlet, and moving the damper parallel along an axis of the overfire air duct to increase and decrease the overfire air entering the inlet, wherein the damper has an open position at which the damper is extended out of the inlet and a closed position in which the damper is substantially in the inlet and blocking air entering the inlet.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: May 15, 2012
    Assignee: General Electric Company
    Inventors: Robert W. Waltz, Quang H. Nguyen
  • Patent number: 8117974
    Abstract: An apparatus for extracting energy from fiber introduced as a fuel into a vertically elongated combustion chamber having a suspension burner capable of projecting a flame down the axis of the combustion chamber with a heat collection surface located radially from the flame and below the burner, and an exhaust opening located below the flame and below at least a portion of the heat collection surface, in which the combusted fiber yields a mixture containing hot flue gas and molten ash above the exhaust opening and heat transfers therefrom to the heat collection surface prior to any substantial contact of ash to a surface of the combustion chamber, to yield a mixture containing warm flue gas and non-molten ash, that is thereafter cooled to yield a mixture containing cool flue gas and non-molten ash.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: February 21, 2012
    Assignee: The McBurney Corporation
    Inventors: Raymond C Ganga, Greg Imig, Blake McBurney, Robert Jensen, John Kerr, Steve J Reust
  • 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