US3788796A - Fuel burner - Google Patents

Fuel burner Download PDF

Info

Publication number
US3788796A
US3788796A US00358779A US3788796DA US3788796A US 3788796 A US3788796 A US 3788796A US 00358779 A US00358779 A US 00358779A US 3788796D A US3788796D A US 3788796DA US 3788796 A US3788796 A US 3788796A
Authority
US
United States
Prior art keywords
air
nozzle
fuel
combustion air
passageway
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00358779A
Other languages
English (en)
Inventor
B Krippene
M Peterson
D Marshall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Application granted granted Critical
Publication of US3788796A publication Critical patent/US3788796A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices

Definitions

  • ABSTRACT An improved pulverized fuel burning method and apparatus having means for enhancing the fuel-air mixture passing therethrough and including three separately controlled passageways delivering the air necessary for combustion of the fuel.
  • the present invention relates to fuel burners and more particularly to an improved pulverized fuel burner for reducing the formation of nitric oxides by lowering the combustion zone temperature and providing a reducing atmosphere in the ignition zone.
  • Nitric oxide is an invisible, relatively harmless gas.
  • nitrogen dioxide N or other oxides of nitrogen collectively referred to as nitric oxides.
  • Nitrogen dioxide is a yellow-brown gas which, in sufficient concentrations is toxic to animal and plant life. It is this gas which may create the visible haze at the stack discharge of a vapor generator.
  • Nitric oxide is formed as a result of the reaction of nitrogen and oxygen and may be thermal nitric oxide and/or fuel-nitric oxide.
  • the former occurs from the re action of the nitrogen and oxygen contained in the air supplied for the combustion of a fossil fuel whereas the latter results from the reaction of the nitrogen contained in the fuel with the oxygen in the combustion air.
  • the rate at which thermal nitric oxide is formed is dependent upon any or a combination of the following variables; l flame temperature, (2) residence time of the combustion gases in the high temperature zone and (3) excess oxygen supply.
  • the rate of formation of nitric oxide increases as flame temperature increases. However, the reaction takes time and a mixture of nitrogen and oxygen at a given temperature for a very short time may produce less nitric oxide than the same mixture at a lower temperature, but for a longer period of time.
  • the rate at which fuel nitric oxide is formed is principally dependent on the oxygen supply in the ignition zone and no appreciable nitric oxide is produced under a reducing atmosphere; that is, a condition where the level of oxygen in the ignition zone is below that required for a complete burning of the fuel.
  • thermal nitric oxide can be reduced by reducing flame temperatures in any degree and will be minimized with a flame temperature at or below 2,900F and that the formation of fuel nitric oxide will be inhibited by providing a reducing atmosphere in the ignition zone.
  • the present invention provides an improved method and apparatus for reducing the formation of nitric oxide while achieving a more complete burning of pulverized fuel than has heretofore been possible.
  • an improvement is made on pulverized fuel burners of the type disclosed in U. S. Pat. No. 3,049,085 by providing an arrangement whrein at least a part of the fuel burning apparatus is disposed within a windbox to which a portion of the necessary combustion air is supplied and which is formed between the adjacently disposed burner and furnace walls of a vapor generating unit.
  • the burner wall is formed with an access opening for admitting that portion of the fuel burning apparatus which normally resides in the windbox whereas the furnace wall is formed with a burner port which accommodates the combining of fuel and air into a combustible mixture and the ignition thereof.
  • the fuel burning apparatus includes a tubular nozzle which is concentrically disposed about the central axis of the burner and has its outlet end opening adjacent the burner port and its inlet end extending through the burner wall and terminating outside of the windbox.
  • the nozzle defines a central passageway and serves to convey a mixture of pulverized fuel and combustion air for discharge through the burner port into the combustion chamber of the vapor generating unit.
  • a first and second sleeve member are disposed within the windbox to direct combustion air therefrom to the burner port.
  • the first sleeve member has a portion thereof concentrically spaced about the nozzle to form an inner annular passageway therebetween and the second sleeve member has a portion thereof concentrically spaced about the first sleeve member to form an outer annular passageway therebetween.
  • Separate damper or register means are provided for apportioning the flow of windbox air between the inner and outer passageways.
  • a venturi is located in the inlet section of the nozzle and is operatively associated with the conical end portion of an adjustable rod to improve fuel air distribution and provide a fuel discharge pattern which maximizes the effectiveness of the tripartite introduction of combustio'n air to the burner port.
  • An object of the invention is to provide a pulverized fuel burning apparatus wherein the initial burning of the fuel is conducted under a reducing atmosphere thereby inhibiting the formation of fuel nitric oxide and providing the lower peak flame temperatures required to minimize the formation of thermal nitric oxide.
  • Another object of the invention is to limit the initial mixing of the fuel and air to cause a recirculating zone which creates a flame stabilizing effect.
  • a further object of the invention is to admit the remaining air required for complete combustion along a flow pattern which surrounds the fuel-rich mixture and eventually mixes with the fuel for complete combustion.
  • FIG. 1 is a schematic sectional elevation view of a vapor generator using fuel burning apparatus embodying the invention.
  • FIG. 2 is a sectional elevation view of the pulverized fuel burner embodying the invention.
  • FIG. 3 is a transverse cross-sectional view taken along line 33 of FIG. 2.
  • FIG. 1 there is shown a vapor generator including water cooled walls 12 which define a furnace chamber or combustion space 14 to which a coal and air mixture is supplied by a pulverized coal burner 16.
  • a pulverized coal burner 16 After combustion has been completed in the furnace chamber 14, the heated gases flow upwardly around-the nose portion 18, over the tubular secondary superheater 20, and thence downwardly through the convection pass 22 containing the tubular primary superheater 24 and the economizer 26.
  • the gases leaving the convection pass 22 flow through tubes of an air heater 28 and are thereafter discharged through a stack 30.
  • a forced draft fan 32 supplies combustion air to the vapor generator and causes it to flow over the air heater tubes and around a plurality of baffles 34 and thence through a duct 36 for apportionment between branch ducts 38 and 40 respectively.
  • the air passing through duct 38 is delivered into a windbox 42 and represents a major portion of the air necessary for combustion of the coal being discharged from the nozzle 44 associated with the fuel burner 16.
  • the windbox air is apportioned between an inner annular passageway 95 and an outer annular passageway 96 for discharge through a burner port 50 and into the furnace 14.
  • the air passing through duct 40 is the remaining portion of air necessary for combustion and is delivered into a primary air fan 52 wherein it is further pressurized and thereafter conveyed through a duct 54 into an air-swept type pulverizing apparatus 56.
  • the coal to be burned in the vapor generator 10 is delivered in raw form via pipe 58 from the raw coal storage bunker 60 to a feeder 62 in response to the load demand on the vapor generator 10 in a manner well known in the art.
  • the pulverizer 56 grinds the raw coal to the desired particle size.
  • the pressurized air from primary air fan 52 sweeps through the pulverizer 56 carrying therewith the ground coal particles for flow through a pipe 64 and thence to the burner nozzle 44 for discharge through the port 50 into furnace 14.
  • a damper 66 is associated with the forced draft fan 32 to regulate the total quantity of air being admitted to the vapor generating unit 10 in response to the load demand.
  • a damper 68 is associated with the primary air fan 52 to regulate the quantity of air being introduced through the burner nozzle 44.
  • FIG. 2 there is shown the pulverized coal burner 16 arranged to fire through the burner port 50, the latter being lined by refractory and formed as a frusto-conical throat diverging toward the furnace side of the wall 12 and being fluid cooled by the tubes 70.
  • An outer burner wall 72 having an access opening 74 is spaced from the furnace wall 12. The space between the burner and furnace walls forms the windbox 42.
  • the pulverized coal burner 16 includes the cylindrical nozzle 44 having an inlet and outlet portion 44A and 448 respectively.
  • the nozzle 44 defines a central passageway 45 and extends through the access opening cover plate 76, across the windbox 42 to a point adjacent the burner opening 50.
  • An open-ended elbow member 78 is flow connected at one end to the nozzle inlet portion 44A and at the other end to the coal burner pipe 64..
  • venturi section 80 disposed within the central passageway 45 and having an inlet and outlet portion 80A and 80B respectively.
  • the trailing edge of the inlet portion 80A lies in the same transverse plane as the trailing edge of the nozzle inlet portion 44A.
  • the outlet portion 808 of venturi 80 has its leading edge terminating at a point intermediate of the ends of nozzle 44, preferably within the inlet half of the central passageway 45.
  • a guide tube 82 extends through an end plate 84 of elbow 78 along a longitudinal axis co-axial with that of the venturi section 80.
  • the guide tube is supportedly fixed to the plate 84 and in turn provides support for rod member 86 which extends therethrough in slidable co-axial relationship therewith.
  • the rod member 86 has both ends thereof protruding past the ends of the guide tube 82, one end being located outside of the burner nozzle 45 and including a stop 88 and the other end projecting into the inlet portion 80A of venturi section 80, the latter end being formed with a conical end piece 90 whose side surface is spaced from and parallel to the inner peripheral surface of the venturi inlet portion 80A.
  • the rod member 86 is sized so that its conical end piece 90 may be positioned at any desired location along the longitudinal axis of the venturi inlet portion 80A.
  • the rod 86 is held fixed in the selected position by a lock-bolt 92 which extends through the wall of guide tube 82.
  • a first and second sleeve member 94 and 96 are disposed within the windbox 42 to direct combustion air to the throat section formed within burner port 50.
  • the first sleeve member 94 has a portion 94A concentrically spaced about the outlet portion 44B of nozzle 44 to form an inner annular passageway 95 therebetween.
  • the remaining portion of sleeve 94 is in the form of a flange plate 948 extending laterally outward from the inlet end of portion 94A.
  • An annular wall plate 98 encircles the nozzle portion 448 and is connected thereto.
  • the plates 94B and 98 are spaced from one another to form the inlet 95A to passageway 95 which extends normal thereto.
  • annular plate 98 is also connected to a sleeve-like section 100 extending along a segment of the outlet portion 44B in contiguous surrounding relationship thereto.
  • the second sleeve member 96 has a portion 96A concentrically spaced about the outlet end of sleeve portion 94A to form an outer annular passageway 97 therebetween.
  • the remaining portion of sleeve 96 is in the form of a flange plate 96B extending laterally outward from the inlet end of portion 96A.
  • An annular wall plate 102 encircles the sleeve portion 94A and is connected thereto.
  • the plates 96B and 102 are spaced from one another to form the inlet 97A to passageway 97 which extends normal thereto.
  • a plurality of dampers or registers 104 are located within the inlet 95A to passageway 95 and are circumferentially and equidistantly spaced and pivotally connected between and adjacent the outer periphery of the plates 94B and 98.
  • the dampers 104 are adapted to pivot between open, closed and intermediate positions and are preferably interconnected through a linkage train 105 so as to be collectively and simultaneously adjustable through a shaft member 106 operatively connected thereto and terminating outside of the windbox 42 and connected to a manually operated handle 108.
  • a plurality of dampers or registers 110 are located within the inlet 97A to passageway 97 and are circumferentialiy and equidistantly spaced and pivotally connected between and adjacent the outer periphery of the plates 96B and 102.
  • the dampers 110 are adapted to pivot between open, closed and intermediate positions and are preferably interconnected through a linkage train 107 so as to be collectively and simultaneously adjustable through a shaft member 112 operatively connected thereto and terminating outside of the windbox 42 and connected to a manually operated handle 115.
  • a plurality of vanes 114 are arranged in surrounding relationship to the sleeve-like section 100 and are located within the inner annular passageway 95, the vanes 114 are equidistantly spaced and preferably linked to one another so as to be collectively and simultaneously adjustable through a shaft member 1 l6 operatively connected thereto and terminating outside of the windbox 42 and connected to a manually operated handle 118'.
  • shaft members 106, 112 and 116 may be suitably geared or otherwise connected to an operating means (not shown) which would be responsive to an automatic control.
  • An ignitor assembly 120 of known type extends through cover plate 76 and through the back plate 98 and terminates at the discharge end of annular space 95.
  • An observation tube 122 extends through the cover plate 76 and through the back plate 98 and terminates adjacent to the inside of back plate 98.
  • FIG. 3 shows a fragmented portion of the windbox side of cover plate 76 and includes the flange plate 968 with the pivots 110A of the dampers 110 extending therethrough.
  • the sleeve portions 96A and 94A cooperate with one another to form the outer annular passageway 97 therebetween and the nozzle portion 448 and sleeve portion 94A'cooperate to form the inner annular passageway 95 therebetween.
  • the passageway 95 houses the vanes 114 and the discharge end of ignitor 120.
  • the nozzle portion 44B defines the outlet portion of central passageway 45.
  • the coal to be burned in the furnace 14 is delivered in raw form via pipe 58 from the raw coal storage bunker 60 to the pulverizer feeder 62, which regulates the quantity of coal supplied to the pulverizer 56 in response to the load demand on the vapor generator in a manner well known in the art.
  • the pulverizer 56 being of the air-swept type, is supplied with pressurized combustion air from a primary air fan 52, the quantity of air supplied being regulated by a damper device 68 to provide sufficient air to initiate ignition at the burner discharge and provide adequate flow velocity to insure a thorough sweeping of the pulverizer 56, coal burner pipe 64 and nozzle 16.
  • the conical end-shaped rod member 86 is axially adjustable to vary the net' effective area across a section of the venturi 80, thus varying the velocity of the coal-air mixture passing therethrough and providing the means for enhancing fuel-air distribution and the pattern of fuel discharge from nozzle 44.
  • the total air required for combustion is delivered to the vapor generator by a forced draft fan 32 including a damper device 66 which regulates the quantity of air in response to the load demand on the vapor generator 10 in a manner well known in the art.
  • the combustion air is heated as it comes into indirect contact with the flue gases flowing through the tubes of an air heater 28 and is thereafter conveyed through a duct 36 to be apportioned between branch ducts 40 and 38, the former leads to the pulverizer 56 as afore-described and the latter leads to the windbox whence the air is apportioned between the inner and outer passageways and 96 respectively.
  • an improved pulverized fuel burner comprising a tubular nozzle having an inlet and an outlet end, said nozzle having at least a portion thereof disposed within the windbox and having the outlet end opening adjacent said port, means for supplying a mixture of pulverized fuel and the remaining portion of the necessary combustion air to the nozzle for discharge into said port, a first and second sleeve member disposed within the windbox to direct the air therefrom to said port, the first sleeve member having a portion thereof concentrically spaced about the nozzle to form an inner annular passageway therebetween, the second sleeve member having a portion thereof concentrically spaced about the first sleeve member to form an outer annular passageway therebetween, and separate damper means associated with each of said passageways for apportioning the
  • damper means for regulating the quantity of air flowing through said nozzle.
  • a method of inhibiting the formation of nitric oxide from the combustion of fuel including at least one burner port, means for supplying pulverized fuel and combustion air to said port, a pulverized fuel burner having a nozzle defining a central passageway, means forming an inner annular passageway about said nozzle, means forming an outer annular passageway about said inner passageway and means apportioning the flow of combustion air between said passageways and comprising the steps of:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
US00358779A 1973-05-09 1973-05-09 Fuel burner Expired - Lifetime US3788796A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35877973A 1973-05-09 1973-05-09

Publications (1)

Publication Number Publication Date
US3788796A true US3788796A (en) 1974-01-29

Family

ID=23411009

Family Applications (1)

Application Number Title Priority Date Filing Date
US00358779A Expired - Lifetime US3788796A (en) 1973-05-09 1973-05-09 Fuel burner

Country Status (10)

Country Link
US (1) US3788796A (it)
JP (2) JPS5236609B2 (it)
AR (1) AR200443A1 (it)
AU (1) AU473125B2 (it)
CA (1) CA1004920A (it)
DE (1) DE2421452B2 (it)
ES (1) ES425827A1 (it)
GB (1) GB1465173A (it)
IT (1) IT1036513B (it)
ZA (1) ZA742939B (it)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370923A1 (fr) * 1976-11-15 1978-06-09 Babcock & Wilcox Co Moyens pour empecher la formation de bioxydes d'azote par brulage de combustible
DE2816733A1 (de) * 1978-04-18 1979-10-25 Combustion Eng Kohlegefeuerte ofenanlage und verfahren zum betreiben hiervon
US4173189A (en) * 1977-01-21 1979-11-06 Combustion Engineering, Inc. Boiler cold start using pulverized coal in ignitor burners
FR2434335A1 (fr) * 1978-08-25 1980-03-21 Ver Kesselwerke Ag Procede et appareil pour bruler des combustibles pauvres en gaz et peu inflammables, avec depart de cendres a sec
EP0056709A2 (en) * 1981-01-14 1982-07-28 The Babcock & Wilcox Company Fuel burners
DE3049517A1 (de) * 1980-12-30 1982-07-29 Chang-Long Taipei Hsien Taiwan Lee Verfahren und vorrichtung zur erzeugung einer suspension von feinkoerniger kohle in luft als brennstoff fuer einen brenner
EP0062228A1 (de) * 1981-04-08 1982-10-13 Deutsche Babcock Werke Aktiengesellschaft Brenner für die Verbrennung mehrerer Brennstoffe
US4381718A (en) * 1980-11-17 1983-05-03 Carver George P Low emissions process and burner
US4457289A (en) * 1982-04-20 1984-07-03 York-Shipley, Inc. Fast fluidized bed reactor and method of operating the reactor
US4517904A (en) * 1984-02-28 1985-05-21 Riley Stoker Corporation Furnace, burner and method for burning pulverized coal
US4545307A (en) * 1984-04-23 1985-10-08 Babcock-Hitachi Kabushiki Kaisha Apparatus for coal combustion
US4693680A (en) * 1986-08-14 1987-09-15 Union Carbide Corporation Flame stabilized post-mixed burner
US4748919A (en) * 1983-07-28 1988-06-07 The Babcock & Wilcox Company Low nox multi-fuel burner
US4836772A (en) * 1988-05-05 1989-06-06 The Babcock & Wilcox Company Burner for coal, oil or gas firing
US5131334A (en) * 1991-10-31 1992-07-21 Monro Richard J Flame stabilizer for solid fuel burner
US5199355A (en) * 1991-08-23 1993-04-06 The Babcock & Wilcox Company Low nox short flame burner
US5365865A (en) * 1991-10-31 1994-11-22 Monro Richard J Flame stabilizer for solid fuel burner
US5415114A (en) * 1993-10-27 1995-05-16 Rjc Corporation Internal air and/or fuel staged controller
US5525053A (en) * 1994-12-01 1996-06-11 Wartsila Diesel, Inc. Method of operating a combined cycle power plant
US5526758A (en) * 1994-11-02 1996-06-18 The Babcock & Wilcox Company Distribution cone for pulverized coal burners
US5697306A (en) * 1997-01-28 1997-12-16 The Babcock & Wilcox Company Low NOx short flame burner with control of primary air/fuel ratio for NOx reduction
US5727480A (en) * 1996-04-17 1998-03-17 Foster Wheeler International, Inc. Over-fire air control system for a pulverized solid fuel furnace
US5771823A (en) * 1996-01-31 1998-06-30 Aep Resources Service Company Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner
US6244200B1 (en) * 2000-06-12 2001-06-12 Institute Of Gas Technology Low NOx pulverized solid fuel combustion process and apparatus
US6837702B1 (en) 1994-12-01 2005-01-04 Wartsila Diesel, Inc. Method of operating a combined cycle power plant
US6938561B1 (en) * 1999-08-30 2005-09-06 Von Roll Umwelttechnik Ag Device for producing a rotating flow
US20070095259A1 (en) * 2005-11-02 2007-05-03 Velke William H Method for oxygen enriched low NOx, low CO2 and low CO combustion of pulverized solid fuel suspended in a preheated secondary fluid hydrocarbon fuel
US20070272132A1 (en) * 2006-05-26 2007-11-29 Marx Peter D Ultra low NOx burner replacement system
US20090214989A1 (en) * 2008-02-25 2009-08-27 Larry William Swanson Method and apparatus for staged combustion of air and fuel
US20160153657A1 (en) * 2014-11-28 2016-06-02 Alstom Technology Ltd Combustion system for a boiler

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5644504A (en) * 1979-09-20 1981-04-23 Kawasaki Heavy Ind Ltd Method of combusting pulverized coal in pluverized coal combusting furnace
JPS6026922B2 (ja) * 1980-02-25 1985-06-26 川崎重工業株式会社 微粉炭バ−ナ
JPS5843313A (ja) * 1981-09-10 1983-03-14 Mitsubishi Heavy Ind Ltd 微粉炭燃焼バ−ナ
JPS58224207A (ja) * 1982-06-19 1983-12-26 Babcock Hitachi Kk 微粉炭燃焼装置
GB2136554B (en) * 1983-03-15 1986-06-11 Volcano Company Limited Oil burner and a method of effecting combustion therein
GB2159266B (en) * 1984-05-11 1988-08-10 Tauranca Ltd Fluid fuel fired burner
US5044327A (en) * 1990-09-14 1991-09-03 The Babcock & Wilcox Company Air/burner port
JP5487917B2 (ja) * 2009-11-30 2014-05-14 株式会社Ｉｈｉ 多燃料用バーナ装置
JP6188658B2 (ja) * 2014-09-24 2017-08-30 三菱重工業株式会社 燃焼バーナ及びボイラ
CN108700549B (zh) * 2016-03-04 2021-08-10 默克有限公司 样品分离器具及样品分析装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2244821A (en) * 1940-05-13 1941-06-10 Frederick S Bloom Combustion apparatus
US2458541A (en) * 1944-11-16 1949-01-11 Comb Processes Company Low velocity oil burner
US2690795A (en) * 1949-12-05 1954-10-05 Webb Howard William Barrett Fuel oil burner and controlling apparatus
US3672812A (en) * 1969-12-09 1972-06-27 Burmeister & Wains Mot Mask Fuel burner unit for mounting in a common air box

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1817470A (en) * 1923-09-28 1931-08-04 Adams Henry Fuel burning apparatus and method
US3049085A (en) * 1959-06-30 1962-08-14 Babcock & Wilcox Co Method and apparatus for burning pulverized coal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2244821A (en) * 1940-05-13 1941-06-10 Frederick S Bloom Combustion apparatus
US2458541A (en) * 1944-11-16 1949-01-11 Comb Processes Company Low velocity oil burner
US2690795A (en) * 1949-12-05 1954-10-05 Webb Howard William Barrett Fuel oil burner and controlling apparatus
US3672812A (en) * 1969-12-09 1972-06-27 Burmeister & Wains Mot Mask Fuel burner unit for mounting in a common air box

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370923A1 (fr) * 1976-11-15 1978-06-09 Babcock & Wilcox Co Moyens pour empecher la formation de bioxydes d'azote par brulage de combustible
US4173189A (en) * 1977-01-21 1979-11-06 Combustion Engineering, Inc. Boiler cold start using pulverized coal in ignitor burners
DE2816733A1 (de) * 1978-04-18 1979-10-25 Combustion Eng Kohlegefeuerte ofenanlage und verfahren zum betreiben hiervon
FR2434335A1 (fr) * 1978-08-25 1980-03-21 Ver Kesselwerke Ag Procede et appareil pour bruler des combustibles pauvres en gaz et peu inflammables, avec depart de cendres a sec
US4381718A (en) * 1980-11-17 1983-05-03 Carver George P Low emissions process and burner
DE3049517A1 (de) * 1980-12-30 1982-07-29 Chang-Long Taipei Hsien Taiwan Lee Verfahren und vorrichtung zur erzeugung einer suspension von feinkoerniger kohle in luft als brennstoff fuer einen brenner
US4380202A (en) * 1981-01-14 1983-04-19 The Babcock & Wilcox Company Mixer for dual register burner
EP0056709A2 (en) * 1981-01-14 1982-07-28 The Babcock & Wilcox Company Fuel burners
EP0056709A3 (en) * 1981-01-14 1983-07-06 The Babcock & Wilcox Company Fuel burners
DE3205640A1 (de) * 1981-04-08 1983-02-24 Deutsche Babcock Werke AG, 4200 Oberhausen Brenner und verfahren fuer die verbrennung mehrerer brennstoffe
EP0062228A1 (de) * 1981-04-08 1982-10-13 Deutsche Babcock Werke Aktiengesellschaft Brenner für die Verbrennung mehrerer Brennstoffe
US4457289A (en) * 1982-04-20 1984-07-03 York-Shipley, Inc. Fast fluidized bed reactor and method of operating the reactor
US4748919A (en) * 1983-07-28 1988-06-07 The Babcock & Wilcox Company Low nox multi-fuel burner
US4517904A (en) * 1984-02-28 1985-05-21 Riley Stoker Corporation Furnace, burner and method for burning pulverized coal
US4545307A (en) * 1984-04-23 1985-10-08 Babcock-Hitachi Kabushiki Kaisha Apparatus for coal combustion
US4693680A (en) * 1986-08-14 1987-09-15 Union Carbide Corporation Flame stabilized post-mixed burner
US4836772A (en) * 1988-05-05 1989-06-06 The Babcock & Wilcox Company Burner for coal, oil or gas firing
US5199355A (en) * 1991-08-23 1993-04-06 The Babcock & Wilcox Company Low nox short flame burner
US5365865A (en) * 1991-10-31 1994-11-22 Monro Richard J Flame stabilizer for solid fuel burner
US5131334A (en) * 1991-10-31 1992-07-21 Monro Richard J Flame stabilizer for solid fuel burner
US5415114A (en) * 1993-10-27 1995-05-16 Rjc Corporation Internal air and/or fuel staged controller
US5526758A (en) * 1994-11-02 1996-06-18 The Babcock & Wilcox Company Distribution cone for pulverized coal burners
US6837702B1 (en) 1994-12-01 2005-01-04 Wartsila Diesel, Inc. Method of operating a combined cycle power plant
US5525053A (en) * 1994-12-01 1996-06-11 Wartsila Diesel, Inc. Method of operating a combined cycle power plant
US5823760A (en) * 1994-12-01 1998-10-20 Wartsila Diesel, Inc. Method of operating a combined cycle power plant
US5771823A (en) * 1996-01-31 1998-06-30 Aep Resources Service Company Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner
US5960723A (en) * 1996-01-31 1999-10-05 Aep Resources Service Company Method and apparatus for reducing NOX emmissions from a multiple-intertube pulverized-coal burner
US6155183A (en) * 1996-01-31 2000-12-05 A E P Resources Service Company Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner
US5727480A (en) * 1996-04-17 1998-03-17 Foster Wheeler International, Inc. Over-fire air control system for a pulverized solid fuel furnace
US5697306A (en) * 1997-01-28 1997-12-16 The Babcock & Wilcox Company Low NOx short flame burner with control of primary air/fuel ratio for NOx reduction
US6938561B1 (en) * 1999-08-30 2005-09-06 Von Roll Umwelttechnik Ag Device for producing a rotating flow
US6244200B1 (en) * 2000-06-12 2001-06-12 Institute Of Gas Technology Low NOx pulverized solid fuel combustion process and apparatus
US20070095259A1 (en) * 2005-11-02 2007-05-03 Velke William H Method for oxygen enriched low NOx, low CO2 and low CO combustion of pulverized solid fuel suspended in a preheated secondary fluid hydrocarbon fuel
US20070272132A1 (en) * 2006-05-26 2007-11-29 Marx Peter D Ultra low NOx burner replacement system
US8689707B2 (en) * 2006-05-26 2014-04-08 Fuel Tech, Inc. Ultra low NOx burner replacement system
US20090214989A1 (en) * 2008-02-25 2009-08-27 Larry William Swanson Method and apparatus for staged combustion of air and fuel
US7775791B2 (en) * 2008-02-25 2010-08-17 General Electric Company Method and apparatus for staged combustion of air and fuel
US20160153657A1 (en) * 2014-11-28 2016-06-02 Alstom Technology Ltd Combustion system for a boiler
US10948182B2 (en) * 2014-11-28 2021-03-16 General Electric Technology Gmbh Combustion system for a boiler

Also Published As

Publication number Publication date
ZA742939B (en) 1975-12-31
AU6872374A (en) 1975-11-13
GB1465173A (it) 1977-02-23
CA1004920A (en) 1977-02-08
DE2421452B2 (de) 1979-07-26
ES425827A1 (es) 1976-06-16
JPS5069633A (it) 1975-06-10
JPS6039923B2 (ja) 1985-09-09
JPS58173304A (ja) 1983-10-12
DE2421452A1 (de) 1974-11-28
JPS5236609B2 (it) 1977-09-17
IT1036513B (it) 1979-10-30
AU473125B2 (en) 1976-06-10
AR200443A1 (es) 1974-11-08

Similar Documents

Publication Publication Date Title
US3788796A (en) Fuel burner
US4748919A (en) Low nox multi-fuel burner
US4380202A (en) Mixer for dual register burner
US3880570A (en) Method and apparatus for reducing nitric in combustion furnaces
US4565137A (en) Bio-mass suspension burner
US3904349A (en) Fuel burner
US3868211A (en) Pollutant reduction with selective gas stack recirculation
CA1135172A (en) Low nox burner
US3604824A (en) Thermal incineration unit
JPS61217607A (ja) 化石燃料を用いて燃やす大規模燃焼装置のＮＯｘ含有量を減らすための方法及び装置
KR100236131B1 (ko) 작은 방출량 및 작은 초과공기량을 이용하는 증기 발전 시스템
US5044935A (en) Method and apparatus for operating a firing plant using fossil fuels
US4144017A (en) Pulverized coal combustor
EP0193601A1 (en) Method and apparatus for conducting a substantially isothermal combustion process in a combustor
CA1065701A (en) Steam boilers
CN101629718A (zh) 低氮氧化物多管轴向涡流粉煤燃烧器
CN105605560B (zh) 微排放煤粉燃烧系统
CA1172924A (en) Steam temperature control with overfire air firing
US5899172A (en) Separated overfire air injection for dual-chambered furnaces
CZ417098A3 (cs) Způsob řízení provozu jádrového hořáku pro vytváření radiálně vrstevnatého plamene
CN110375300A (zh) 一种低氮氧化物排放的燃烧器
CN214840783U (zh) 设置有中心风的浓缩型双调风旋流低氮燃烧器
CA1204999A (en) Low nox multifuel burner
US4423689A (en) Method of producing pulverized coal as fuel for pulverized-coal pilot burners
JPH0262769B2 (it)