EP1731832A1 - Arrangement d'un brûleur à jet pour la combustion du charbon pulvérisé dans une chambre de combustion à émission réduite de NOx - Google Patents

Arrangement d'un brûleur à jet pour la combustion du charbon pulvérisé dans une chambre de combustion à émission réduite de NOx Download PDF

Info

Publication number
EP1731832A1
EP1731832A1 EP06090099A EP06090099A EP1731832A1 EP 1731832 A1 EP1731832 A1 EP 1731832A1 EP 06090099 A EP06090099 A EP 06090099A EP 06090099 A EP06090099 A EP 06090099A EP 1731832 A1 EP1731832 A1 EP 1731832A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
fuel
air
combustion chamber
combustion
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.)
Withdrawn
Application number
EP06090099A
Other languages
German (de)
English (en)
Inventor
Andreas Mengel
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.)
Vattenfall Europe Generation AG and Co KG
Original Assignee
Vattenfall Europe Generation AG and Co KG
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 Vattenfall Europe Generation AG and Co KG filed Critical Vattenfall Europe Generation AG and Co KG
Publication of EP1731832A1 publication Critical patent/EP1731832A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • 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 
    • 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
    • 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
    • F23C7/02—Disposition of air supply not passing through burner
    • 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 an arrangement on a jet burner for burning pulverized coal in a low nitrogen oxide Brennschakiung, wherein the jet burner consists of one or more main burners and the fuel nozzles are limited by under air nozzles, intermediate air nozzles and top air nozzles.
  • the DE 35 31 571 A1 relates to a method for burning fuels while reducing the nitrogen oxide load and a furnace for carrying out the method.
  • coal dust in particular is introduced tangentially into a rectangular or square combustion chamber via main burners and, in addition, reduction fuel is introduced into the combustion chamber via reduction burners for reducing the nitrogen oxides formed during the combustion of the main fuel and burned in a substoichiometric manner.
  • combustion air is supplied to the conversion of the main fuel above the supply of main and reduction fuel. The supply of all reactants is done in such a way that a helical ascending flow is built up in the furnace.
  • the reduction burner near its associated main burner are arranged at least with a lateral distance and aligned so that when operating the Tangential85ung the injected over the reduction burner reducing fuel is mixed at a predetermined location in the main burner to be assigned primary flame.
  • a device for combustion of fuels in a combustion chamber is known. These are round burners which supply the combustion chamber with fuel and primary air via a fuel nozzle.
  • the secondary air which is necessary for substoichiometric combustion, reaches the combustion chamber via spaced secondary air nozzles at the side of the fuel nozzles.
  • a further secondary air nozzle is arranged next to the secondary air nozzle which is present in the direction of the combustion chamber wall.
  • the air staging is realized with an additional air nozzle above the fuel nozzle.
  • the invention is based on the object at jet burners for burning coal dust while maintaining a stoichiometric burner operation to ensure a minimal nitrogen oxide and minimizing the CO content of improving the dynamics and shortening of the burner flame and creating a sufficient air curtain to avoid fuel contact with the combustion chamber wall to reach.
  • the additional side air nozzles may advantageously have the same vertical extent as the fuel nozzles or extend over the entire vertical length of the main burner.
  • the additional side air nozzles can be designed as individual nozzles with a round or rectangular channel cross section. Rectangular channel cross sections can be subdivided into further smaller channel sections, in order to achieve a trim in the air supply.
  • An essential advantage of the invention results from the fact that with this arrangement, the fuel jet practically also experiences a lateral fixation. That is, oxygen is provided immediately to the side of the fuel nozzle, that is, in the regions prone to recirculation flows. This eliminates the hitherto directly prevailing oxygen deficiency and avoids the contact of unburned gases with the wall of the combustion chamber. Due to the all-round inclusion of the fuel nozzle by the laterally without distance attached to these air nozzles and the upper air, insects- and under air nozzles also shortening and thus stabilization of the entire flame is achieved, resulting in a better positioning of the flame in the middle of the combustion chamber without Touching the wall areas makes noticeable.
  • each beater mill On a fired with raw lignite steam generator with a square combustion chamber cross-section two impact wheel mills are arranged side by side on each combustion chamber wall. Seven of the eight beater mills convey the milled and dried lignite dust during normal operation of the steam generator as well as the flue gas sucked in via flue gas return suckers plus primary air as a mixture with the main burners 1.
  • a beater wheel mill is in reserve position. Each beater mill includes two main burners 1, which are embedded one above the other in the wall of the combustion chamber.
  • the furnace is designed as a tangential firing, that is, the axes of the main burner 1 are directed to a circle of the combustion chamber longitudinal axis.
  • the promotion of coal dust-flue gas mixture of the beater mills to the main burners 1 is carried out directly on coal dust pipes, which can be made rectangular.
  • the division of the coal dust-flue gas mixture of a beater mill on their two main burner 1 is carried out by appropriate separation of the coal dust line, z. B. by means of built-in dividers.
  • To compensate for thermal expansion corresponding joint systems can be provided in the coal dust lines.
  • the main burner 1 is designed in the form of a jet burner consisting of three rectangular fuel nozzles 2 (FIG. 2).
  • the fuel nozzles 2 are bounded below by the lower air nozzle 3 and above by the upper air nozzle 5, between the individual fuel nozzles 2 intermediate air nozzles 4 are arranged.
  • the sub-air nozzles 3, the upper air nozzles 5 and the intermediate air nozzles 4 are arranged over the entire width of the fuel nozzle 2 and may be divided into several sections.
  • the described arrangement of air and fuel nozzles serves the low- NOx combustion.
  • the coal dust-flue gas mixture is entered into the combustion chamber.
  • a further addition of air for complete burnout takes place above the upper main burner 1 via the burn-out air nozzles 8 (FIG. 1).
  • the addition of the air for the burnout can also be done in stages in several levels of the combustion chamber.
  • a side air nozzle 6 is additionally arranged without a lateral distance from the fuel nozzle 2.
  • the side air nozzles 6 have the same vertical extension as the respective fuel nozzle 2.
  • a side air nozzle 6 is like the other nozzles also made of temperature-resistant material.
  • the attachment to the fuel nozzle 2 is analogous to the under air nozzles 3, the top air nozzles 5 and the intermediate air nozzles 4 correspond to the structural conditions in the masonry. 7
  • One possible embodiment of the side air nozzle 6 is its vertical extension over the entire height of the main burner 1. In this case, possible dust strands could be detected at the corner regions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP06090099A 2005-06-11 2006-06-08 Arrangement d'un brûleur à jet pour la combustion du charbon pulvérisé dans une chambre de combustion à émission réduite de NOx Withdrawn EP1731832A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005027022 2005-06-11

Publications (1)

Publication Number Publication Date
EP1731832A1 true EP1731832A1 (fr) 2006-12-13

Family

ID=37025087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06090099A Withdrawn EP1731832A1 (fr) 2005-06-11 2006-06-08 Arrangement d'un brûleur à jet pour la combustion du charbon pulvérisé dans une chambre de combustion à émission réduite de NOx

Country Status (1)

Country Link
EP (1) EP1731832A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3228935A1 (fr) 2016-04-08 2017-10-11 Steinmüller Engineering GmbH Procédé de combustion pauvre en oxyde d'azote de combustibles gazeux, solides ou liquides, en particulier de poussière de charbon, brûleur et installation de combustion destinée à éxecuter le procédé
DE102017101670A1 (de) 2017-01-27 2018-08-02 Babcock Borsig Steinmüller Gmbh Brenner, insbesondere Braunkohle-Strahlbrenner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022454A2 (fr) * 1979-07-12 1981-01-21 Combustion Engineering, Inc. Four avec des jeux d'ajutages pour l'introduction tangentielle de charbon pulvérisé, d'air et de gaz de recyclage
US4511325A (en) * 1982-03-05 1985-04-16 Coen Company, Inc. System for the reduction of NOx emissions
DE3920798A1 (de) * 1989-06-24 1991-01-10 Balcke Duerr Ag Vorrichtung zur verbrennung von brennstoffen in einer brennkammer
US5329866A (en) * 1993-09-03 1994-07-19 The Babcock & Wilcox Company Combined low NOx burner and NOx port
DE4416945C1 (de) * 1994-05-13 1995-06-08 Steinmueller Gmbh L & C Verfahren zur Verbrennung von Braunkohle mittels eines Strahlbrenners, Strahlbrenner und Tangential-Feuerungsanlage
DE19514302A1 (de) * 1995-04-25 1996-10-31 Evt Energie & Verfahrenstech Verfahren und Feuerungssystem zur stickoxidarmen Wärmeerzeugung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022454A2 (fr) * 1979-07-12 1981-01-21 Combustion Engineering, Inc. Four avec des jeux d'ajutages pour l'introduction tangentielle de charbon pulvérisé, d'air et de gaz de recyclage
US4511325A (en) * 1982-03-05 1985-04-16 Coen Company, Inc. System for the reduction of NOx emissions
DE3920798A1 (de) * 1989-06-24 1991-01-10 Balcke Duerr Ag Vorrichtung zur verbrennung von brennstoffen in einer brennkammer
US5329866A (en) * 1993-09-03 1994-07-19 The Babcock & Wilcox Company Combined low NOx burner and NOx port
DE4416945C1 (de) * 1994-05-13 1995-06-08 Steinmueller Gmbh L & C Verfahren zur Verbrennung von Braunkohle mittels eines Strahlbrenners, Strahlbrenner und Tangential-Feuerungsanlage
DE19514302A1 (de) * 1995-04-25 1996-10-31 Evt Energie & Verfahrenstech Verfahren und Feuerungssystem zur stickoxidarmen Wärmeerzeugung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3228935A1 (fr) 2016-04-08 2017-10-11 Steinmüller Engineering GmbH Procédé de combustion pauvre en oxyde d'azote de combustibles gazeux, solides ou liquides, en particulier de poussière de charbon, brûleur et installation de combustion destinée à éxecuter le procédé
DE102017101670A1 (de) 2017-01-27 2018-08-02 Babcock Borsig Steinmüller Gmbh Brenner, insbesondere Braunkohle-Strahlbrenner
WO2018138323A1 (fr) 2017-01-27 2018-08-02 Bilfinger Engineering & Technologies Gmbh Brûleur, notamment brûleur radiant pour lignite

Similar Documents

Publication Publication Date Title
DE69107857T2 (de) Feuerungssystem mit mehrfachbrennern und mit tangentialer luftzufuhr konzentrisch zum zentralteil des feuerraumes.
DE60318380T2 (de) Festbrennstoffkessel und Betriebsverfahren einer Verbrennungsvorrichtung
EP2202460B1 (fr) Brûleur à flamme en nappe et procédé de fonctionnement d'un brûleur à flamme en nappe
DE102009003521A1 (de) Verfahren und Einrichtung für gestufte Verbrennung von Luft und Brennstoff
EP2500640A1 (fr) Procédé de combustion à faible NOx et brûleur correspondant
EP3076076B1 (fr) Procede de commande de combustion pour foyer a grille
EP1754937B1 (fr) Tête de brûleur et procédé pour brûler du combustible
DE3403981C2 (fr)
AU2007237340B2 (en) Combustion System and Process
DE102009003518A1 (de) Verbrennungs-Systeme und-Prozesse zum Verbrennen fossilen Brennstoffes mit verringerten Stickstoffoxid-Emissionen
DE19514302C2 (de) Verfahren und Feuerungssystem zur stickoxidarmen Wärmeerzeugung
EP1731832A1 (fr) Arrangement d'un brûleur à jet pour la combustion du charbon pulvérisé dans une chambre de combustion à émission réduite de NOx
DE102007044043B4 (de) Glasschmelzanlage und Verfahren zum Betrieb
DE102008013891B4 (de) Brennkammer für einen mit Festbrennstoffen beheizbaren Heizkessel
EP1926936A1 (fr) Ensemble de bruleurs pour une chambre de combustion, chambre de combustion correspondante et procede pour bruler un combustible
DE19541178C2 (de) Verfahren zum Verbrennen von staubförmigem Brennstoff, insbesondere Braunkohle, in einem Feuerraum
EP3228935B1 (fr) Procédé de combustion pauvre en oxyde d'azote de combustibles gazeux, solides ou liquides, en particulier de poussière de charbon, brûleur et installation de combustion destinée a exécuter le procédé
DE102008063709B4 (de) Flammrohrkessel mit mechanischer Rostfeuerung
WO2016151048A1 (fr) PROCÉDÉ DE RÉDUCTION D'ÉMISSIONS DE NOx LORS DE LA COMBUSTION DE COMBUSTIBLE PULVÉRULENT
DE102006022657B4 (de) Verfahren und Anordnung zur Luftmengen-Regelung eines mit fossilen, festen Brennstoffen betriebenen Verbrennungssystems
AT397569B (de) Brenner
DE3614177C2 (de) Brennkammer
DE102005001907B4 (de) Verfahren und Anlage zur Verbrennung eines Brennstoffs
WO2002002468A1 (fr) Introduction de combustible gazeux avec reduction de la formation d'azote dans des orifices d'air a combustion de fours a bassin
DE3317507C2 (de) Verfahren zur Verminderung des NO↓X↓-Gehaltes in Rauchgasen einer Schmelzfeuerung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060627

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20070112