EP0213492B1 - Verfahren zum Verfeuern von Brennstoffen unter Reduzierung der Stickoxidbelastung und Feuerung zur Durchführung des Verfahrens - Google Patents

Verfahren zum Verfeuern von Brennstoffen unter Reduzierung der Stickoxidbelastung und Feuerung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0213492B1
EP0213492B1 EP86111206A EP86111206A EP0213492B1 EP 0213492 B1 EP0213492 B1 EP 0213492B1 EP 86111206 A EP86111206 A EP 86111206A EP 86111206 A EP86111206 A EP 86111206A EP 0213492 B1 EP0213492 B1 EP 0213492B1
Authority
EP
European Patent Office
Prior art keywords
main
reduction
burners
fuel
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.)
Expired
Application number
EP86111206A
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German (de)
English (en)
French (fr)
Other versions
EP0213492A1 (de
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
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Filing date
Publication date
Application filed by L&C Steinmueller GmbH filed Critical L&C Steinmueller GmbH
Publication of EP0213492A1 publication Critical patent/EP0213492A1/de
Application granted granted Critical
Publication of EP0213492B1 publication Critical patent/EP0213492B1/de
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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 the main fuel is introduced tangentially into a combustion chamber and burned via a main burner, and reduction fuel is introduced into the combustion chamber via a reduction burner 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.
  • the individual openings are not assigned to specific main burners.
  • One of the two burners arranged one above the other is arranged obliquely in the combustion chamber wall, so that the longitudinal axes intersect at a predetermined distance from the burner orifices.
  • One burner is operated with pulverized coal and the other burner with heavy oil.
  • the two flames are coincident, on the one hand to suppress the formation of fuel NOx during the combustion of the coal and on the other hand to reduce the formation of thermal NO x during the hot combustion of heavy oil. There is no indication of how NOX already formed is to be reduced with the help of a reduction fuel.
  • This object is achieved in that a reduction burner is assigned directly to each main burner and the reduction fuel of the assigned reduction burner is mixed with the curved inflow leaving the main burner for screw-like flow in the center of the combustion chamber at a predetermined distance from the mouth of the main burner at a point where the formation of nitrogen oxides in gas reactions in the flame of the main burner is complete.
  • the reduction fuel is thus supplied in a direct assignment to 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 mixture is mixed with the reduction fuel 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 and laterally offset assignment to the main burner, as a result of which the overall height of the combustion chamber can be reduced.
  • the air ratio on the main 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 nis from main fuel to reduction 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.
  • the reducing fuel it is also possible for the reducing fuel to be introduced in a lagging manner with respect to the main fuel in relation to the direction of rotation of the helical flow.
  • the same fuel preferably lignite
  • the reduction fuel is used as the main fuel and the reduction fuel. It may be appropriate for the reducing fuel to be introduced with air and / or flue gas. Mixtures are possible.
  • the invention is also directed to tangential firing with a multiplicity of main burners aligned with a combustion circuit, a multiplicity of reduction burners and a multiplicity of burnout air nozzles arranged above the reduction burners.
  • a reduction burner is directly assigned to each main burner and that each reduction burner is arranged near the main burner at least at a lateral distance and is aligned such that the reduction fuel injected via the reduction burner is operated at a predetermined point in the operation of the tangential burner primary flame to be assigned to the main burner is admixed at a point at which the formation of nitrogen oxides in gas reactions in the flame of the main burner is completed.
  • the two reduction burners assigned to the two main burners are arranged between the two main burners.
  • the two reduction burners assigned to the two main burners are each arranged on the same side of the main burner and in the same combustion chamber wall as the main burner.
  • the particular advantages of the method come into play when at least two main burners are arranged one below the other and the two associated reduction burners are arranged in a vertical plane parallel to them.
  • the number and arrangement of the burnout air nozzles correspond to the number and arrangement of the main burners, or that a larger number of burnout air nozzles are arranged evenly distributed 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. If the reduction fuel were now injected, for example, via a reduction burner 6 shown in FIG. 1 and located in the same burner level, the reduction fuel cannot reduce the NO x formed in the primary flames of the burner 3 and 4 below, since it essentially does not with this NO x comes into contact more.
  • two adjacent main burners 2 and 2 'and two adjacent main burners 3 and 3' are provided on each wall of the furnace, the burners 2 and 3 or 2 'and 3' in the same vertical plane lie.
  • the burners each consist of an under air supply UL, a first fuel supply Bi, an intermediate air supply ZL, a second fuel supply B 2 and an upper air supply OL.
  • a reduction burner 6 or 6 ' is assigned to each of the four main burners 2, 2', 3 and 3 ', and 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 3 flow 2 'on curved ascending paths B2 or B2' inwards and upwards, ie upwards from the plane of the drawing in FIG. 3.
  • 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 z , the mixing points M essentially indicating the completion of the gas reactions in the primary flames.
  • burnout air nozzle 8 and 8 ' there is a burnout air nozzle 8 and 8 'in the mirror of the burners 2 and 3 or 2' and 3 'arranged one above the other, while in the embodiment according to FIGS. 4 and 5 a large number of the burners are not special associated burnout air nozzles 9 are provided.
  • the burnout air nozzle configurations can also be replaced.

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 Verfahren zum Verfeuern von Brennstoffen unter Reduzierung der Stickoxidbelastung und Feuerung zur Durchführung des Verfahrens Expired EP0213492B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6280110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111206A Expired EP0213492B1 (de) 1985-09-04 1986-08-13 Verfahren zum Verfeuern von Brennstoffen unter Reduzierung der Stickoxidbelastung und Feuerung zur Durchführung des Verfahrens

Country Status (6)

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

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IN168173B (ja) * 1986-03-24 1991-02-16 Combustion Eng
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
AU3535593A (en) * 1992-03-26 1993-09-30 Boc Group, Inc., The Method for combusting a fuel-oxidant mixture
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
EP3228935B1 (de) 2016-04-08 2019-10-16 Steinmüller Engineering GmbH Verfahren zur stickoxid-armen verbrennung von festen, flüssigen oder gasförmigen brennstoffen, insbesondere kohlenstaub, ein brenner und eine feuerungsanlage zur durchführung des verfahrens
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

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Also Published As

Publication number Publication date
EP0213492A1 (de) 1987-03-11
AU6231286A (en) 1987-03-05
AU593575B2 (en) 1990-02-15
DE3667198D1 (de) 1990-01-04
DE3531571C2 (ja) 1988-12-08
US4810186A (en) 1989-03-07
GR862166B (en) 1986-12-23
JPS6284211A (ja) 1987-04-17
DE3531571A1 (de) 1987-03-05

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