Having Rotary Flow Means Patents (Class 110/264)
  • Patent number: 10359193
    Abstract: In accordance with the flow distribution of combustion gas including an unburned portion, an after-air port (AAP) arranged downstream of the two-stage combustion burner can effectively reduce the unburned portion by dividing as appropriate so as to avoid interaction, and by mixing together, two types of after-air having functions of linearity and spreading. As the configuration of this AAP, a primary nozzle for supplying primary after-air and having a vertical height greater than the horizontal width is provided in the center in the opening of the AAP, a secondary nozzle for supplying secondary after-air is provided in the opening outside of the primary nozzle, and one or more secondary after-air guide vanes having a fixed or variable tilt angle relative to the after-air port center axis are provided at the outlet of the said secondary nozzle to deflect and supply the secondary after-air horizontally to the left or right.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: July 23, 2019
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Kenji Kiyama, Miki Shimogori, Toshihiko Mine, Satoshi Tadakuma, Kenichi Ochi, Koji Kuramashi, Yusuke Ochi, Akira Baba, Yuki Kondo
  • Patent number: 10267241
    Abstract: A Volatile Organic Compound (VOC) mitigation system employs a combination of technologies coupling VOC laden exhaust with a reciprocating engine and generator system (Combined Heat & Power (CHP) System) with heat recovery to destroy the VOC emissions and generate electric power and useful thermal energy.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: April 23, 2019
    Assignee: Leidos, Inc.
    Inventors: William Ronald Steen, Scott Francis Coon
  • Patent number: 9945555
    Abstract: A burner is disclosed for generating flame and heat. The burner includes a first stage, a second stage downstream of the first stage, a third stage downstream of the first and second stages, and a fourth stage downstream of the first, second, and third stages. The first stage comprises a first innermost air chamber and a first mixing chamber for air and fuel, wherein the first stage includes separate conduits for air and fuel, and wherein the air and fuel begin to mix in the first mixing chamber during use to form an air/fuel mixture. The second stage comprises a second mixing chamber which comprises a deflection plate to force the air/fuel mixture outward from the centerline. The third stage comprises a combustion zone. The combustion zone includes a swirl generator. The swirl generator has an inner diameter greater than an outer diameter of the deflection plate. The swirl generator produces a swirl, whirl, vortex, or the like in the flame during operation.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: April 17, 2018
    Inventor: Pedro Hernandez Cruz
  • Patent number: 9784192
    Abstract: A Volatile Organic Compound (VOC) mitigation system employs a combination of technologies coupling VOC laden exhaust with a reciprocating engine and generator system (Combined Heat & Power (CHP) System) with heat recovery to destroy the VOC emissions and generate electric power and useful thermal energy.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: October 10, 2017
    Assignee: Leidos, Inc.
    Inventors: William Ronald Steen, Scott Francis Coon
  • Patent number: 9719677
    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: Grant
    Filed: January 15, 2013
    Date of Patent: August 1, 2017
    Assignee: 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
  • Patent number: 9644540
    Abstract: A collector 3 that collects particles P contained in a fluid includes: a bent pipe 31 that guides the fluid flowing from a first direction X in a second direction Z; a branch pipe 32 that causes the fluid guided in the second direction Z to branch into the second direction Z and a third direction Y; a collection pipe 34 in which the particles P in the fluid guided in the second direction Z by the branch pipe 32 are collected; and a reduction-expansion pipe 33 which is arranged between the bent pipe 31 and the branch pipe 32 and of which the flow path is narrowed while being biased to an inlet side of the bent pipe 31.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: May 9, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Akinori Yamaguchi, Kazuya Higashi, Kiyonori Kushioka
  • Patent number: 9545590
    Abstract: A method of separating solid particles from gaseous matter comprises rotating a spinner about a spinner axis in a rotational direction. The spinner has fluid passageways that operatively connect a gaseous inlet environment to a gaseous outlet environment. The fluid passageways circumferentially extending in a direction opposite the rotational direction as the fluid passageways extend radially inward. The method further comprises forcing gaseous matter radially inward through the rotating spinner by creating pressure differential that is such that the pressure of the gaseous inlet environment exceeds the pressure of the gaseous fluid outlet. An assembly comprises a spinner configured to rotate in a rotational direction. The spinner has fluid passageways that operatively connect a gaseous inlet environment to a gaseous outlet environment. A heating element is positioned adjacent to the spinner in a manner such that particles flung from the spinner can strike the heating element.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: January 17, 2017
    Assignee: INNERPOINT ENERGY CORPORATION
    Inventors: Scott Garrett, Andrew Schlote
  • Patent number: 9500144
    Abstract: A Volatile Organic Compound (VOC) mitigation system employs a combination of technologies coupling VOC laden exhaust with a reciprocating engine and generator system (Combined Heat & Power (CHP) System) with heat recovery to destroy the VOC emissions and generate electric power and useful thermal energy.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: November 22, 2016
    Assignee: Leidos, Inc.
    Inventors: William Ronald Steen, Scott Francis Coon
  • Patent number: 9359241
    Abstract: The present invention concerns a method of making a mineral melt by burning combustible material in the presence of inorganic particulate material and thereby forming a melt, comprising injecting fuel, particulate mineral material and combustion gas into a circulating combustion chamber (1) through an inlet conduit (4) and combusting the fuel in the circulating combustion chamber (1) thereby melting the mineral material to form a mineral melt and generating exhaust gases; separating the exhaust gases from the mineral melt, collecting the mineral melt (9) and passing the exhaust gases upwards through an exhaust pipe (10) to a conduit (11) of a heat exchange system; and supplying particulate mineral material and a first portion of waste mineral wool into the conduit (11) and pre-heating the supplied material in the heat exchange system, and supplying a second portion of waste mineral wool with a water content between 5 and 25% by weight directly to the inlet conduit (4).
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: June 7, 2016
    Assignee: Rockwool International A/S
    Inventor: Lars Elmekilde Hansen
  • Publication number: 20150128833
    Abstract: A description is given of a cyclone burner for converting solid fuel comprising a substantially rotationally-symmetric whirling chamber (1), means for introducing gas and fuel into the whirling chamber (1), means for bringing the gas and fuel into rotation in the whirling chamber (1) and an outlet (4) for the gas and the converted fuel where the outlet (4) is centrally positioned in the outlet end (3) of the whirling chamber (1). The cyclone burner is characterized in that the whirling chamber (1) comprises a conical shaped portion (2) having the smaller diameter furthest from the outlet end (3) and in that the means (5) for introducing gas are connected to the whirling chamber (1) along the length of the conical shaped portion (2).
    Type: Application
    Filed: November 25, 2011
    Publication date: May 14, 2015
    Applicant: FLSMIDTH A/S
    Inventors: Mads Nielsen, Mads Peter Rasmussen, Karl Emil Andreas Strömberg, Mads Kristian Ullitz, Jagannath Pandian Manohar
  • 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
  • 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: 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: 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: 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: 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
  • 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: 8544499
    Abstract: A simplified variable orifice for a conduit furnishing a stream of particulate coal to a burner for a turbine in an electrical utility plant. Two plates are installed across the conduit, one of them being fixed and the other being variable in angular position relative to the first. A lockable mechanism is provided externally of the conduit to manually adjust the degree of blocking and to indicate the position of the movable plate.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: October 1, 2013
    Inventor: Wark E. Rickey
  • 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: 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: 8443740
    Abstract: A cyclonic incinerator includes a cylindrical outer burn chamber having a defining wall, a central axis, a first end, a second end, and a forced air opening extending through the wall between the first end and the second end. A forced air manifold is provided which is adapted to direct forced air into the forced air opening of the outer burn chamber to create a cyclonic air flow about the central axis of the outer burn chamber. A cylindrical inner burn chamber is concentrically disposed within the outer burn chamber. The inner burn chamber has a defining wall, a first end and a second end. The first end of the inner burn chamber has an exhaust gas opening. The second end of the inner burn chamber is in communication with the outer burn chamber. A gas inlet is positioned at the first end of the outer burn chamber.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: May 21, 2013
    Assignee: Maralto Environmental Technologies Ltd.
    Inventor: Marlin Romeo
  • 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: 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: 20120325128
    Abstract: An apparatus for constantly supplying pulverized fuel at ambient or increased pressure includes a restrictable pulverized fuel control valve in the pulverized fuel feed line connecting the swirl layer of a dispensing vessel with a pulverized fuel collector is provided. This pulverized fuel control valve effects a compensation for and also attenuation of the pressure fluctuations, as occur in the pulverized fuel feed line, particularly during refill processes of the dispensing vessel. Special embodiments relate to a further homogenization by a fixed throttle facility and also auxiliary gas feeds into the pulverized fuel feed line.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 27, 2012
    Inventors: Frank Frisch, Frank Hannemann, Thomas Metz, Manfred Schingnitz
  • Patent number: 8308477
    Abstract: An apparatus and process is provided for combining fuel and combustion air to produce a mixture. The mixture is burned in a combustion chamber to produce a flame.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: November 13, 2012
    Assignee: Honeywell International Inc.
    Inventors: Douglas M. Perry, Jeffrey T. Rafter
  • 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
  • Patent number: 8251088
    Abstract: A simplified variable orifice for a conduit furnishing a stream of particulate coal to a burner for a turbine in an electrical utility plant. Two plates are installed across the conduit, one of them being fixed and the other being variable in angular position relative to the first. A lockable mechanism is provided externally of the conduit to manually adjust the degree of blocking and to indicate the position of the movable plate.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: August 28, 2012
    Inventor: Rickey E. Wark
  • Publication number: 20120174838
    Abstract: A burner for a combustion apparatus, a combustion apparatus comprising such burners, and a method of operation of the same are described. The burner comprises: a fuel input conduit for supplying fuel to the burner; a combustion gas input conduit for supplying combustion gas to a first stage combustion site; an overfire gas input conduit for supplying overfire gas to a second stage combustion site; and gas supply means; wherein the gas supply means is adapted to supply gas switchably between a first mode of operation wherein air is supplied in suitable proportion to both the combustion gas input conduit and the overfire gas input conduit; and a second mode of operation wherein an oxygen containing gas other than air is supplied to the combustion gas input conduit and substantially no gas is supplied to the overfire gas input conduit.
    Type: Application
    Filed: July 23, 2010
    Publication date: July 12, 2012
    Applicant: DOOSAN POWER SYSTEMS LIMITED
    Inventors: Stuart D. Cameron, Euan D Cameron
  • 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: 8113824
    Abstract: A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: February 14, 2012
    Inventors: Hamid Sarv, Albert D. LaRue, William J. Kahle, Alan N. Sayre, Daniel R. Rowley
  • Publication number: 20110203498
    Abstract: A process that uses targeted in-furnace Injection to feed a fluxing agent of the chemical family of compositions containing boron and/or alkali hydrates to either decrease heat transfer on waterwalls of utility furnaces burning solid fuels to improve steam generation, maintain steam temperature, and/or allow a protective layer of slag to form inside the barrels of cyclones on cyclone boilers burning fuels high in calcium so that the boiler can operate at a wider variety of power settings while allowing proper flow and drainage of slag from the cyclone barrels.
    Type: Application
    Filed: February 23, 2011
    Publication date: August 25, 2011
    Applicant: Fuel Tech Inc.
    Inventors: Christopher R. Smyrniotis, Kent W. Schulz
  • Publication number: 20110117507
    Abstract: Disclosed herein is a novel nozzle tip assembly 250 for rapid replacement of nozzle tips 200 in a solid fuel furnace. The nozzle tip assembly 250 employs a pivot pin assembly 410, 420 430 that is recessed and protected from corrosion/abrasion. It pivotally attaches the nozzle tip 200 to the stationary nozzle 110. It employs a fastener 411 that is accessible from through the central opening of the nozzle tip 200. This allows removal of the nozzle tip from inside the furnace greatly simplifying nozzle tip 200 replacement.
    Type: Application
    Filed: November 13, 2009
    Publication date: May 19, 2011
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: Oliver G. Briggs, JR., Thomas J. Campanelli, Kevin T. Grzebien
  • Patent number: 7926432
    Abstract: A low NOx Cyclone furnace steam generator including redesigned or modified Cyclone furnaces, air flow distribution, and new or relocated air ports maintains and/or minimizes NOx emission levels from the Cyclone furnace steam generator while minimizing Cyclone furnace and steam generator furnace tube wastage.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: April 19, 2011
    Inventors: Gerald J. Maringo, George H. Harth, III, Manvil O. Dahl, Linda P. Dahl, legal representative, Steven W. Burge, Rosemary Burge, legal representative, Mitchell W. Hopkins
  • Publication number: 20110048293
    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: Application
    Filed: August 26, 2009
    Publication date: March 3, 2011
    Applicant: R-V INDUSTRIES, INC.
    Inventor: John Grusha
  • Patent number: 7770528
    Abstract: A solid fuel burner and its combustion method suited for encouraging fuel ignition and avoiding slugging caused by combustion ash, wherein a gas of low oxygen concentration (exhaust combustion gas) is used as a carrier gas of such a low grade solid fuel as brown coal. An additional air nozzle for jetting additional air having a velocity component in the circumferential direction of a fuel nozzle is provided in the fuel nozzle, thereby encouraging mixing between the fuel and air in the fuel nozzle. Further, the amount of air supplied from the additional air nozzle is adjusted in response to the difference in combustion loads. Under light load, the amount of air supplied from the additional air nozzle is increased so as to increase the oxygen concentration of the circulating flow formed downstream of the outside of the outlet of the fuel nozzle, whereby stable combustion is ensured.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: August 10, 2010
    Assignee: Babcock- Hitachi K.K.
    Inventors: Hirofumi Okazaki, Kenji Yamamoto, Kenji Kiyama, Kouji Kuramashi
  • Patent number: 7717701
    Abstract: A burner includes a first oxidant conduit to transmit a first stream of an oxidant; a solid fuel conduit having an outtake and surrounding the first oxidant conduit, thereby forming a first annulus to transmit a mixture of a transport gas and particles of a solid fuel; a second oxidant conduit surrounding the solid fuel conduit, thereby forming a second annulus to transmit a second stream of the oxidant or an other oxidant; and means for segregating the mixture proximate the outtake into a lean fraction stream and a dense fraction stream. The first stream of the oxidant exiting the first oxidant conduit combines during combustion with the lean fraction stream, thereby forming an inner combustion zone adjacent the outtake, and the second stream of the oxidant, or the other oxidant, exiting the second oxidant conduit combines during combustion with the dense fraction stream, thereby forming an outer combustion zone.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: May 18, 2010
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Francis Anthony Milcetich
  • Publication number: 20100050912
    Abstract: In order, for operating the lance burner of a rotary tubular furnace for the production of cement clinker from calcined raw cement meal, to provide an automated regulation method which is optimized in terms of the configuration of the burner flame for all types and quantities of fuels used, according to the invention a regulation method is proposed in which the characteristics of the burner flame are used as measurement variables, and the measurement variables are delivered to a controller which can vary at least three different manipulated variables of the burner, such as the spatial outflow angle and the swirl momentum of the swirled primary-airstream and/or the angle of divergence of the primary-air/jet-air jets emerging from individual nozzles and/or the velocity of emergence and/or swirl component of a stream of fragmentary alternative fuels or secondary fuels which is blown through the burner.
    Type: Application
    Filed: December 20, 2007
    Publication date: March 4, 2010
    Applicant: KHD HUMBOLDT WEDAG GMBH
    Inventors: Matthias Mersmann, Gernot Jäger, Alexander Knoch
  • Publication number: 20100018445
    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: Application
    Filed: July 18, 2007
    Publication date: January 28, 2010
    Applicant: HARBIN INSTITUTE OF TECHNOLOGY
    Inventors: Zhenggi Li, Zhichao Chen, Rui Sun, Shaozeng Sun, Shaohua Wu, Ming Qin, Yunkun Qin
  • Publication number: 20100012005
    Abstract: A stud and stud arrangement protects the water-cooled tubes of a slag tap outlet from corrosion and erosion by flowing slag and flue gas. The stud is a generally annular or ring-like segment. The stud has a projection terminating in an edge adapted to contact a tube at stud contact area, and has a weld surface for receiving a weld. The weld contacts a tube at a weld contact area and thermally and physically connects the stud to a tube. The weld surface area is greater than the stud contact area, thereby improving heat transfer between the tube and stud. The studs are disposed in an arrangement that is staggered in a direction perpendicular to the flow slag and flue gas.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 21, 2010
    Inventors: Bruce E. Beckle, Timothy P. Kors, Barry J. DeBois, Roger W. Sunderland, Christopher T. Marshall, Eugene R. Opryszko, Gerland J. Maringo
  • Publication number: 20100006012
    Abstract: To achieve an improvement in concentration distribution in a vertical direction at an inlet of a pulverized coal distributor and uniformly distribute pulverized coal to respective pulverized coal burners.
    Type: Application
    Filed: March 19, 2008
    Publication date: January 14, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shinji Matsumoto, Tsugio Yamamoto, Masahiko Taniguchi, Kazuhiro Takeuchi
  • Patent number: 7621154
    Abstract: A method for supplying heat to a melting furnace for forming a molten product using ash-containing fuels. A fuel having an ash component is introduced into a slagging chamber of a slagging combustor and at least partially combusted with a first oxidant mixture and a second oxidant mixture within the slagging chamber. Ash component is collected as a layer of molten slag in the slagging chamber. Slagging combustor gas effluent is passed from the slagging chamber of the slagging combustor into the combustion space of the melting furnace at high temperature to supply heat to form the molten product. Molten slag is withdrawn from the slagging chamber of the slagging combustor and may be selectively introduced into the melting furnace or not introduced into the melting furnace.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: November 24, 2009
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Mark Daniel D'Agostini
  • Patent number: 7575613
    Abstract: A method for producing methane (69) from a carbonaceous (22) material includes conveying pulverized carbonaceous material (28) entrained in an inert carrier fluid, such as carbon dioxide (36), into a reactor (34). The reactor (34) includes a vortex region (72) for receiving hydrogen gas (38) and imparting a swirling motion to the hydrogen gas (38). The pulverized carbonaceous material (28) is exposed to the swirling stream of hydrogen gas (38) in a first reaction zone (114) within the reactor (34) to form an exit gas (40) that includes methane (69). Remaining unreacted carbonaceous material (28) is further exposed to the hydrogen gas (38) in a second, low velocity, reaction zone (120). The methane rich exit gas (40) is subsequently extracted from the reactor (34) for further processing.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: August 18, 2009
    Assignee: Arizona Public Service Company
    Inventor: Raymond S. Hobbs
  • Publication number: 20090000532
    Abstract: With a burner, especially pulverized coal burner, with a fuel conveying tube and a primary air tube which is concentrically arranged within it, wherein the primary air tube on the mouth discharge side terminates at a distance to the mouth opening of the fuel conveying tube, and the burner is connected, or can be connected, to a feed line which conveys pulverous fuel in dense phase, a solution is to be created which enables a low-NOX burner, which is suitable for firing the furnace of a steam generator, to be equipped with a dense phase conveyance of the fuel, without the low-NOX combustion characteristic being disadvantageously affected. This is achieved by the inside space of the primary air tube being able to be connected, or being connected, to a primary air feed line, and by the fuel conveying space, which is formed between the primary air tube and the fuel conveying tube, being able to be connected, or being connected, to the feed line which feeds pulverous fuel to the burner in dense phase.
    Type: Application
    Filed: June 23, 2008
    Publication date: January 1, 2009
    Inventor: Martin EHMANN
  • Publication number: 20080149471
    Abstract: A pyrolyzer and method is provided for devolatizing coal and other volatile materials. The pyrolyzer has a pyrolyzer furnace housing having at least two screws laterally positioned adjacent and overlapping rotatably mounted within the furnace for moving volatile material through the pyrolyzer furnace housing. The screws have hollow drive shafts with a diverter inside for converging heated fluid to heat the volatile material moving through the pyrolyzer furnace housing. A combustion chamber combusts fuel to create heated exhaust gas for directing through the hollow drive shafts to heat the volatile material. The pyrolyzer furnace housing may have a double wall with a cavity between, capable of receiving heated fluid for further heating of volatile material moving through the pyrolyzer furnace housing.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 26, 2008
    Applicant: NUCOR CORPORATION
    Inventor: Richard A. Wolfe
  • Patent number: 7213522
    Abstract: A solid fuel burner and its combustion method suited for encouraging fuel ignition and avoiding slugging caused by combustion ash, wherein a gas of low oxygen concentration (exhaust combustion gas) is used as a carrier gas of such a low grade solid fuel as brown coal. Means for Solving the Subject An additional air nozzle 12 for jetting additional air having a velocity component in the circumferential direction of a fuel nozzle 11 is provided in the fuel nozzle 11, thereby encouraging mixing between the fuel and air in the fuel nozzle 11. Further, the amount of air supplied from the additional air nozzle 12 is adjusted in response to the difference in combustion loads. Under light load, the amount of air supplied from the additional air nozzle 12 is increased so as to increase the oxygen concentration of the circulating flow 19 formed downstream of the outside of the outlet of the fuel nozzle 11, whereby stable combustion is ensured.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: May 8, 2007
    Assignee: Babcock-Hitachi K.K.
    Inventors: Hirofumi Okazaki, Kenji Yamamoto, Kenji Kiyama, Kouji Kuramashi
  • Patent number: 6968791
    Abstract: A method for operating a cyclone combustor having first and second burners in communication with a barrel includes: feeding a stream of a primary fuel and a primary oxidant having a first oxygen concentration into the first burner; feeding a stream of a secondary fuel and a secondary oxidant having a second oxygen concentration greater than or equal to the first oxygen concentration into the second burner; combusting at least a portion of the primary fuel with at least a portion of the primary oxidant in the barrel of the cyclone combustor, thereby forming a plurality of primary products of combustion in the barrel; and combusting at least a portion of the secondary fuel with at least a portion of the secondary oxidant, thereby forming a plurality of secondary products of combustion and a secondary flame, the secondary flame generating a supplemental radiant heat in the barrel.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: November 29, 2005
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, Kevin Boyle Fogash, Francis Anthony Milcetich
  • Patent number: 6910432
    Abstract: A method for combusting a fuel in a cyclone combustor having a burner and a barrel includes: feeding a stream of the fuel into the barrel at the burner end of the barrel; feeding a stream(s) of a first oxidant (e.g., air) having a first oxygen concentration into the barrel at a first flowrate, the stream(s) of the first oxidant including a predominant stream; feeding a stream(s) of a second oxidant (e.g., oxygen) having a second oxygen concentration into the barrel at a second flowrate and in a selective manner, whereby a portion of the first oxidant combines with a portion of the second oxidant, thereby forming a combined oxidant having a combined oxygen concentration, and a portion of the first oxidant from the predominant stream continues having the first oxygen concentration; and combusting a portion of the fuel with a portion of the combined oxidant in the barrel.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: June 28, 2005
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Daniel D'Agostini, William Russell Welliver, Craig J. Cain-Borgman, Kevin Boyle Fogash, Kevin M. Duffy, Francis Anthony Milcetich
  • Patent number: 6862877
    Abstract: A biomass fuel combustor for use in the pressurized combustion comprising of biomass fule particles to produce a pressurized exhaust gas, the combustor comprising: a cyclonic combustion chamber having a combustion region and first and second fuel inlets, the first inlet being for the entry into the chamber of gas and/or liquid secondary fuel for combustion in said combustion region and the second inlet being for the entry into the chamber of biomass fuel particles also for combustion in said combustion region, the chamber being so constructed and arranged that the heat generated by the secondary fuel combustion will, in use and at least during stan-up of the combustor, promote fragmentation of the incoming biomass fuel particles.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: March 8, 2005
    Assignee: James Engineering (Turbines) Limited
    Inventor: David W James
  • Publication number: 20040185408
    Abstract: A cooling grate for a bulk-material cooler, in particular for combustion material (8) such as cement clinker, of which the top side forms a carrying surface which supports the combustion material (8) which is to be cooled, the cooling grate (1) being made up of a plurality of fixed shaped profiles (4) which partially engage one over the other and between which gas-throughflow channels (5) are formed, it being the case that the shaped profiles (4) are of the same shape and have a central part (41) and outer parts (42, 43) which are angled in opposite directions to the central part (41), the shaped profiles (4) being arranged such that in each case one of the gas-throughflow channels (5) is formed between in each case one of the outer parts (42′, 43) of two directly adjacent shaped profiles (4, 4′). There is preferably provided a support (3) which has position-defining mounts (36) for the shaped profiles (4).
    Type: Application
    Filed: April 12, 2004
    Publication date: September 23, 2004
    Inventors: Thomas Staak, Ulrich Suer, Archibald Wallace