EP0213492A1 - Procédé pour brûler des combustibles avec réduction de la charge en oxyde d'azote et foyer pour la mise en oeuvre du procédé - Google Patents

Procédé pour brûler des combustibles avec réduction de la charge en oxyde d'azote et foyer pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0213492A1
EP0213492A1 EP86111206A EP86111206A EP0213492A1 EP 0213492 A1 EP0213492 A1 EP 0213492A1 EP 86111206 A EP86111206 A EP 86111206A EP 86111206 A EP86111206 A EP 86111206A EP 0213492 A1 EP0213492 A1 EP 0213492A1
Authority
EP
European Patent Office
Prior art keywords
main
fuel
reduction
burners
burner
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.)
Granted
Application number
EP86111206A
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German (de)
English (en)
Other versions
EP0213492B1 (fr
Inventor
Klaus-Dieter Dipl.-Ing. Rennert
Wolfgang Dipl.-Ing. Schreier
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.)
Hitachi Zosen Inova Steinmueller GmbH
Original Assignee
L&C Steinmueller GmbH
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 L&C Steinmueller GmbH filed Critical L&C Steinmueller GmbH
Publication of EP0213492A1 publication Critical patent/EP0213492A1/fr
Application granted granted Critical
Publication of EP0213492B1 publication Critical patent/EP0213492B1/fr
Expired legal-status Critical Current

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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 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • 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 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones

Definitions

  • the invention relates to a method for firing solid, liquid or gaseous fuels, in particular coal dust, in which main fuel is introduced and burned tangentially into a combustion chamber via main burners, and reduction fuel is introduced into the combustion chamber via reduction burners to reduce the nitrogen oxides formed during the combustion of the main fuel and is burned substoichiometrically and in which burnout air is supplied above the supply of main and reduction fuel to ensure the burnout of the fuel introduced into the combustion chamber, a screw-like, rising flow being built up in the combustion chamber.
  • main fuel is introduced and burned tangentially into a combustion chamber via main burners
  • reduction fuel is introduced into the combustion chamber via reduction burners to reduce the nitrogen oxides formed during the combustion of the main fuel and is burned substoichiometrically and in which burnout air is supplied above the supply of main and reduction fuel to ensure the burnout of the fuel introduced into the combustion chamber, a screw-like, rising flow being built up in the combustion chamber.
  • a main burner combustion zone In the known procedure, a main burner combustion zone, a nitrogen oxide reduction zone, in which the Reconstruction fuel is burned substoichiometrically and a burnout zone above the burnout air supply.
  • the main burner, reduction burner and burnout air nozzle are arranged in a burner mirror, ie one above the other in a vertical plane (cf. in particular FIG. 20, the pressure pin). It has been found that the large-scale application of such a fuel rating encounters difficulties.
  • the gaseous and solid substances move upwards along a helical path, so that if the reduction burners are arranged in the same vertical plane as the main burner (s), it is not ensured that the reduction fuel can no longer reduce the NO formed below, since the fuel no longer comes into contact with him.
  • the reduction fuel is thus introduced largely without taking into account the position of the primary flames in the lower part of the combustion chamber in which the NO x is formed. This local independence is particularly disadvantageous when some burners are switched off during part-load operation, because good mixing between the flue gases from the primary combustion zone and the reduction fuel can then no longer be achieved.
  • This task is aaaurcn that aer reduction fuel of a reduction burner of the curved main flow leaving the assigned main burner to the screw-like flow around the center of the combustion chamber is mixed in at a predetermined distance from the mouth of the main burner.
  • the reduction fuel is supplied in direct association with the individual main burner.
  • the flow vector of the curved and possibly already rising inflow is taken into account, i.e. the supply of the reduction fuel is aligned with the inflow from the main burner in such a way that the mixing with the reduction fuel takes place after the gas reactions in the primary flame have been completed in order to reduce the nitrogen oxides formed in the gas reactions.
  • the reduction fuel is injected in close association with the main burner, which means that the overall height of the combustion chamber can be reduced.
  • the air ratio at the primary burner is preferably between 0.8 and 1.2 and should be between 0.6 and 1.0 after the reduction fuel has been mixed in.
  • the ratio of primary fuel to secondary fuel is between 50:50 and 90:10.
  • the reduction fuel is preferably introduced in advance of the main fuel in relation to the direction of rotation of the helical flow. However, it may also be possible that the supply is lagging in relation to the direction of rotation. These relative relationships between the fuels can be achieved by changing the injection angle and / or the injection location.
  • burnout air must be added for the complete burnout after completion of the reduction processes.
  • the invention is also directed to tangential firing with a large number of main burners aligned with a combustion circuit, a large number of reduction burners and a large number of burnout air nozzles arranged above the reduction burners, in particular for carrying out the method described above.
  • each reduction burner is arranged at least at a lateral distance near the main burner assigned to it and is aligned such that the reduction fuel injected via the reduction burner is mixed into the primary flame to be assigned to the main burner at a predetermined point during operation of the tangential combustion.
  • the reduction burners assigned to the two main burners are arranged between the two main burners.
  • the reduction burners assigned to the two main burners are each arranged on the same side of the main burner.
  • the main burner consists of an under air supply, a first fuel supply, an intermediate air supply with high air pulse, a second fuel supply and an upper air supply in a manner known per se, it is expedient to relate the lateral distance and the orientation of the reduction burner to the intermediate air supply.
  • the number and arrangement of the burnout air nozzles can correspond to the number and arrangement of the main burners. However, it is also possible to distribute a larger number of burnout air nozzles evenly around the combustion chamber.
  • the method according to the invention can be used not only advantageously in the case of tangential firing in the form of wall firing, but also in the case of tangential firing in the form of corner firing.
  • main burners 2, 3 and 4 are arranged one above the other in a burner mirror in the rear wall and are aligned with the combustion circuit 5 shown schematically in the figure.
  • the combustion products leaving the main burner 2 essentially describe the dash-dotted path, the combustion products leaving the main burner 3 the dashed path and the products leaving the main burner 4 the continuous path.
  • Reduction burner 6 shown in the same burner level are injected, the reduction fuel cannot reduce the NO formed in the primary flames of the burner 3 and 4 below, since it essentially does not come into contact with this NO x .
  • two adjacent main burners 2 and 2 1 and two adjacent main burners 3 and 3 1 are provided on each wall of the furnace, the burners 2 and 3 or 2 'and 3 1 in lie in the same vertical plane.
  • the burners each consist of an under air supply UL, a first fuel supply B 1 , an intermediate air supply ZL, a second fuel supply B 2 and an upper air supply OL.
  • a reduction burner 6 or 6 1 is assigned to each of the four main burners 2, 2 1 , 3 and 3 ', namely this burner is offset by a certain amount to the left and a certain amount in relation to the center of the intermediate air supply ZL.
  • the combustion products of the main burners 2 and 2 1 flow inwards and upwards on curved ascending paths B2 and B2 ′, ie upwards from the plane of the drawing in FIG.
  • the arrangement and orientation of the reduction burners 6 and 6 ' is now such that the additional fuel is mixed into the primary flame at predetermined mixing points M 2 and M 2 , the mixing points M essentially indicating the completion of the gas reactions in the primary flames.

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)
EP86111206A 1985-09-04 1986-08-13 Procédé pour brûler des combustibles avec réduction de la charge en oxyde d'azote et foyer pour la mise en oeuvre du procédé Expired EP0213492B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853531571 DE3531571A1 (de) 1985-09-04 1985-09-04 Verfahren zum verfeuern von brennstoffen unter reduzierung der stickoxidbelastung und feuerung zur durchfuehrung des verfahrens
DE3531571 1985-09-04

Publications (2)

Publication Number Publication Date
EP0213492A1 true EP0213492A1 (fr) 1987-03-11
EP0213492B1 EP0213492B1 (fr) 1989-11-29

Family

ID=6280110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111206A Expired EP0213492B1 (fr) 1985-09-04 1986-08-13 Procédé pour brûler des combustibles avec réduction de la charge en oxyde d'azote et foyer pour la mise en oeuvre du procédé

Country Status (6)

Country Link
US (1) US4810186A (fr)
EP (1) EP0213492B1 (fr)
JP (1) JPS6284211A (fr)
AU (1) AU593575B2 (fr)
DE (2) DE3531571A1 (fr)
GR (1) GR862166B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU583717B2 (en) * 1986-03-24 1989-05-04 Combustion Engineering Inc. Low excess air tangential firing system
EP0562816A2 (fr) * 1992-03-26 1993-09-29 The Boc Group, Inc. Procédé pour la combustion d'un combustible

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920798A1 (de) * 1989-06-24 1991-01-10 Balcke Duerr Ag Vorrichtung zur verbrennung von brennstoffen in einer brennkammer
US5199357A (en) * 1991-03-25 1993-04-06 Foster Wheeler Energy Corporation Furnace firing apparatus and method for burning low volatile fuel
US5263849A (en) * 1991-12-20 1993-11-23 Hauck Manufacturing Company High velocity burner, system and method
US5439373A (en) * 1993-09-13 1995-08-08 Praxair Technology, Inc. Luminous combustion system
US5915310A (en) * 1995-07-27 1999-06-29 Consolidated Natural Gas Service Company Apparatus and method for NOx reduction by selective injection of natural gas jets in flue gas
US5746143A (en) * 1996-02-06 1998-05-05 Vatsky; Joel Combustion system for a coal-fired furnace having an air nozzle for discharging air along the inner surface of a furnace wall
US5746144A (en) * 1996-06-03 1998-05-05 Duquesne Light Company Method and apparatus for nox reduction by upper furnace injection of coal water slurry
US6237513B1 (en) * 1998-12-21 2001-05-29 ABB ALSTROM POWER Inc. Fuel and air compartment arrangement NOx tangential firing system
GB2348695A (en) * 1999-04-06 2000-10-11 James Engineering Gas turbines
US6302039B1 (en) * 1999-08-25 2001-10-16 Boiler Island Air Systems Inc. Method and apparatus for further improving fluid flow and gas mixing in boilers
CH694305A5 (de) * 1999-08-30 2004-11-15 Von Roll Umwelttechnik Ag Vorrichtung zur Erzeugung einer rotierenden Stroemung.
DE10019114A1 (de) * 2000-04-18 2001-10-25 Bbp Energy Gmbh Feuerung und Verfahren zur Verbrennung von Kohlenstaub
US6790031B2 (en) * 2003-01-16 2004-09-14 Rjm Corporation Fuel staging methods for low NOx tangential fired boiler operation
FR2880410B1 (fr) * 2005-01-03 2007-03-16 Air Liquide Procede de combustion etagee produisant des flammes asymetriques
RU2597346C1 (ru) * 2015-05-28 2016-09-10 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Пылегазомазутная топка
PL3228935T3 (pl) 2016-04-08 2020-05-18 Steinmüller Engineering GmbH Sposób spalania z niską emisję tlenków azotu paliw stałych, ciekłych lub gazowych, zwłaszcza pyłu węglowego, palnik oraz instalacja paleniskowa do przeprowadzania sposobu
RU2620614C1 (ru) * 2016-06-16 2017-05-29 федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" Способ комбинированного сжигания угольной пыли, природного газа и жидкотопливной смеси

Citations (3)

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DE938326C (de) * 1949-10-29 1956-01-26 Duerrwerke Ag Kohlenstaubfeuerung mit mehreren tangential an verschieden grosse Kreise um die Mittelachse der Brennkammer gerichteten Brennstoffeinblaseduesen
DE2837156A1 (de) * 1977-09-16 1979-03-22 Combustion Eng Verfahren zum verfeuern von festen, fluessigen oder gasfoermigen brennstoffen
GB2146113A (en) * 1983-09-05 1985-04-11 Steinmueller Gmbh L & C Combustion of nitrogenous fuels

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US1776841A (en) * 1925-12-01 1930-09-30 Metropolitan Eng Co Burner
GB698939A (en) * 1951-08-09 1953-10-28 Babcock & Willcox Ltd Improvements in or relating to tubulous vapour generators
US3224419A (en) * 1961-12-13 1965-12-21 Combustion Eng Vapor generator with tangential firing arrangement
JPS55165405A (en) * 1979-06-07 1980-12-23 Mitsubishi Heavy Ind Ltd Combustion method with reduced amount of nitrogen oxide
US4294178A (en) * 1979-07-12 1981-10-13 Combustion Engineering, Inc. Tangential firing system
JPS5623615A (en) * 1979-08-06 1981-03-06 Babcock Hitachi Kk Burning method for low nox
JPS5649803A (en) * 1979-08-24 1981-05-06 Babcock Hitachi Kk Combustion method with low nitroxide
JPS5646905A (en) * 1979-09-26 1981-04-28 Mitsubishi Heavy Ind Ltd Combustor
JPS5691108A (en) * 1979-12-21 1981-07-23 Babcock Hitachi Kk Combustion method capable of reducing nox and uncombusted substance
GB2076135B (en) * 1980-04-22 1984-04-18 Mitsubishi Heavy Ind Ltd Pulverized fuel firing apparatus
JPS5824706A (ja) * 1981-08-06 1983-02-14 Kobe Steel Ltd ＮＯｘ低減混焼法
JPS599413A (ja) * 1982-07-08 1984-01-18 Babcock Hitachi Kk 燃焼装置
US4438709A (en) * 1982-09-27 1984-03-27 Combustion Engineering, Inc. System and method for firing coal having a significant mineral content
JPS59208304A (ja) * 1983-05-13 1984-11-26 Babcock Hitachi Kk 低ＮＯｘ燃焼装置

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
DE938326C (de) * 1949-10-29 1956-01-26 Duerrwerke Ag Kohlenstaubfeuerung mit mehreren tangential an verschieden grosse Kreise um die Mittelachse der Brennkammer gerichteten Brennstoffeinblaseduesen
DE2837156A1 (de) * 1977-09-16 1979-03-22 Combustion Eng Verfahren zum verfeuern von festen, fluessigen oder gasfoermigen brennstoffen
GB2146113A (en) * 1983-09-05 1985-04-11 Steinmueller Gmbh L & C Combustion of nitrogenous fuels

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 102 (M-211)[1247], 30. April 1983; & JP-A-58 024 706 (KOBE SEIKOSHO K.K.) 14.02.1983 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 94 (M-293)[1581], 28. April 1984; & JP-A-59 009 413 (BABCOCK HITACHI K.K.) 18.01.1984 *
PATENTS ABSTRACTS OF JAPAN, Band 8, Nr. 22 (M-272)[1459], 31. Januar 1984; & JP-A-58 182 005 (BABCOCK HITACHI K.K.) 24.10.1983 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU583717B2 (en) * 1986-03-24 1989-05-04 Combustion Engineering Inc. Low excess air tangential firing system
EP0562816A2 (fr) * 1992-03-26 1993-09-29 The Boc Group, Inc. Procédé pour la combustion d'un combustible
EP0562816A3 (fr) * 1992-03-26 1994-02-02 Boc Group Inc

Also Published As

Publication number Publication date
AU593575B2 (en) 1990-02-15
DE3667198D1 (de) 1990-01-04
AU6231286A (en) 1987-03-05
JPS6284211A (ja) 1987-04-17
DE3531571C2 (fr) 1988-12-08
EP0213492B1 (fr) 1989-11-29
DE3531571A1 (de) 1987-03-05
GR862166B (en) 1986-12-23
US4810186A (en) 1989-03-07

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