EP1789726B1 - Procédé pour faire fonctionner un brûleur oxycombustible - Google Patents

Procédé pour faire fonctionner un brûleur oxycombustible Download PDF

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Publication number
EP1789726B1
EP1789726B1 EP05761664.1A EP05761664A EP1789726B1 EP 1789726 B1 EP1789726 B1 EP 1789726B1 EP 05761664 A EP05761664 A EP 05761664A EP 1789726 B1 EP1789726 B1 EP 1789726B1
Authority
EP
European Patent Office
Prior art keywords
oxygen
fuel
burner block
burner
block
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.)
Active
Application number
EP05761664.1A
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German (de)
English (en)
Other versions
EP1789726A1 (fr
Inventor
Martin William Adendorff
Heinz Franke
Horst KÖDER
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.)
Air Liquide Deutschland GmbH
Messer Group GmbH
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide Deutschland GmbH
Messer Group GmbH
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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.)
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Publication date
Application filed by Air Liquide Deutschland GmbH, Messer Group GmbH, Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide Deutschland GmbH
Publication of EP1789726A1 publication Critical patent/EP1789726A1/fr
Application granted granted Critical
Publication of EP1789726B1 publication Critical patent/EP1789726B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/32—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/02—Casings; Linings; Walls characterised by the shape of the bricks or blocks used
    • F23M5/025—Casings; Linings; Walls characterised by the shape of the bricks or blocks used specially adapted for burner openings

Definitions

  • the invention relates to a method for operating a fuel-oxygen burner for a low-emission combustion in the high-temperature region according to the preamble of claim 1.
  • the object of the present invention is to provide a method of operating an oxy-fuel burner provided with which an economic and low-pollution (low NOx) combustion at high temperatures is possible.
  • a fuel-oxygen burner is used, which is operated with technical oxygen as the oxidant or with a predominantly oxygen-containing oxidant in the presence of recirculating combustion gases.
  • the burner for low-emission combustion in the high-temperature range advantageously in melting furnaces, particularly advantageous in glass melting, usable burner with a arranged in a main burner brick with additional burner burner burner body with at least one in a mixing chamber of the additional burner brick opening fuel supply channel and with, guided by the additional burner block and into a combustion chamber the main burner brick opening oxygen supply ducts is characterized in that the center axis of the fuel supply duct on the central axis of the main burner block and the oxygen nozzles are arranged around the central fuel supply duct on a pitch circle.
  • the burner contains a plurality, preferably two to twelve, particularly advantageously eight oxygen nozzles.
  • the pitch circle formed by the oxygen nozzles has a minimum distance A from the central fuel supply passage, which is a multiple of the nozzle diameter, preferably 2.5 to 32 times the nozzle diameter.
  • the mixing chamber of the auxiliary burner block opens by an exit into the combustion chamber of the main burner block.
  • Both the mixing chamber of the auxiliary burner block and the combustion chamber are at least over a part of their longitudinal extent substantially cylindrical, preferably circular cylindrical, formed.
  • This burner design according to the invention allows the oxygen at a speed 2.5 to 3.3 times higher than the fuel in the Burner combustion chamber flows in, thereby ensuring a burner power total pulse current of 15 to 25 N / MW and a ratio of pulse current densities of oxygen and fuel of 5 to 15 and thereby at the outlet of the main burner brick a power density 0.05 to 2 KW / mm 2 is reached.
  • the length of the circular cylindrical mixing chamber formed in the auxiliary burner block is 1.2 to 2.5 times the chamber diameter and the length of the circular cylindrical combustion chamber formed in the main burner block is 0.05 to 0.6 times the diameter of the outlet at the main burner block.
  • the fuel supply duct is advantageously equipped with a sensor connected to an evaluation unit, for example with a UV light receiver arranged expediently for flame monitoring.
  • the main and auxiliary burner block expediently each consist of a heat and corrosion resistant material, preferably of ceramic. It is also possible to make main and auxiliary burner stones in one piece.
  • the burner body and the fuel-oxygen supply passages and the oxygen nozzles are made of a heat and corrosion resistant material, preferably of a NiCr or ODS alloy.
  • the burner body is preferably firmly connected to the main burner block so that a seal between the main burner block and the burner body and thus a secure attachment of the burner body is ensured on the main burner block, preferably by means of a screw connection.
  • the for a low-emission (NO x -arme) high-temperature combustion, especially in melting furnaces, particularly advantageous in glass furnaces, usable fuel-oxygen burner is structurally simple and therefore cost-effectively adaptable to the different conditions of use and can with technical oxygen as the oxidant but also be operated with an oxygen-containing oxidant.
  • the in Fig. 1 shown burner shows a arranged in a main burner block 1 with additional burner block 2 metallic burner body 3.
  • the auxiliary burner block 2 is received in a recess or bore of the main burner block 1.
  • the burner body 3 includes a arranged with its central axis on the central axis of the main burner block 1 feed channel 4 for fuel, which opens into a cylindrical in the additional burner block 2 mixing chamber 10, which has a formed in the additional burner block 2 outlet 6 with a likewise cylindrical, in the main burner block. 1 connected to exit 7 trained combustion chamber 11 is connected.
  • the central fuel supply duct 4 around a plurality of guided through the auxiliary burner block 2 and each provided with a substantially axially parallel to the central supply duct 4 into the combustion chamber 11 opening nozzle 8 supply channels 5 are arranged for the oxygen used as the oxidant.
  • the Fig. 1 It can also be seen that the length e of the mixing chamber 10 is 1.2 to 2.5 times the diameter d and the length L of the combustion chamber 11 is 0.05 to 0.6 times the diameter f .
  • a fuel-oxygen burner equipped with eight oxygen nozzles 8 and a central supply duct 4 for fuel is shown.
  • the arranged on a pitch oxygen nozzles 8 have a minimum distance A from the central fuel supply passage 4, which is 2.5 to 32 times the nozzle diameter b .
  • the natural gas fed to the central supply duct 4 flows into the mixing chamber 10 formed in the auxiliary burner brick 2 at a speed of 60 to 90 m / s and into the combustion chamber 11 formed in the main burner brick 1 through the outlet 6.
  • the oxygen supplied to each supply passage 5 of the burner then flows into the combustion chamber 11 through a nozzle 8 constricting the flow of oxygen at a speed of 70 to 100 m / s.
  • the oxygen flows at a speed 2.5 to 3.3 times higher than the natural gas into the combustion chamber 11.
  • the fuel that has flowed into the combustion chamber 11 of the main burner block 1 is partially combusted with the oxygen flowed into the combustion chamber 11.
  • a stable flame is formed which delivers a sufficient signal for a sensor 12 provided in the exemplary embodiment, preferably a UV light receiver, which is arranged to monitor the flame of the burner in the fuel supply duct 4 and is connected to an evaluation unit, not shown here.
  • Due to the burner design according to the invention is based on the burner power total pulse current of 15 to 25 N / MW with a ratio of the pulse current densities of oxygen and fuel from 5 to 15 and thus a power density of 0.05 to 2 KW / mm 2 at the outlet 7 of the main burner block. 1 achieved the fuel-oxygen burner.
  • the main and auxiliary burner block 1 and 2 in the exemplary embodiment each consist of a ceramic material, the burner body 3, the supply channels 4, 5 and the oxygen nozzles 8 made of a NiCr or ODS alloy.
  • the burner body 3 is connected to the main burner block 1 such that a seal between the main burner block 1 and burner body 3 and a secure attachment of the burner body 3 is ensured on the main burner block 1.
  • a fastening a 4-fold screw consisting of a threaded bolt 14, a nut 16, a counter-holder 15 and a seal 13.
  • the NOx values given in the above overview refer to 3% by volume of residual oxygen in the exhaust gas, an N 2 concentration of 1% by volume in natural gas H, a furnace overpressure of 0.3 mbar and a burner output of 700 kW ,
  • the concentration data of the kiln exhaust gas refer to dry analysis gas.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Claims (10)

  1. Procédé pour faire fonctionner un brûleur oxy-combustible pour une combustion à faible pollution dans le domaine des hautes températures, qui est équipé d'un corps de brûleur (3) disposé dans une brique de brûleur principale (1) avec une brique de brûleur supplémentaire (2) avec au moins un canal d'arrivée de combustible (4) débouchant dans une chambre de mélange (10) de la brique de brûleur supplémentaire (2) et avec des canaux d'arrivée d'oxygène (5) avec des buses à oxygène (8) conduits à travers la brique de brûleur supplémentaire (2) et débouchant dans une chambre de combustion (11) de la brique de brûleur principale (1), dans lequel l'axe central du canal d'arrivée de combustible (4) est disposé sur l'axe central de la brique de brûleur principale (1) et les buses à oxygène (8) sont disposées sur un cercle de référence (9) autour du canal central d'arrivée de combustible (4), et dans lequel le combustible est oxydé avec un agent d'oxydation contenant de l'oxygène en présence de gaz de combustion en recirculation, caractérisé en ce que
    a) l'agent d'oxydation pénètre dans la chambre de combustion (11) avec une vitesse 2,5 à 3,3 fois plus élevée que la vitesse du combustible à travers la sortie (6) de la brique de brûleur supplémentaire (2),
    b) il s'établit un courant pulsé total de 15 à 25 N/MW rapporté à la puissance du brûleur oxy-combustible,
    c) le rapport des densités de courant pulsé d'oxygène et de combustible vaut entre 5 et 15, et
    d) il s'établit à la sortie (7) de la brique de brûleur principal (1) une densité de puissance comprise entre 0,05 et 2 kW/mm2.
  2. Procédé selon la revendication 1, caractérisé en ce que le brûleur oxy-combustible est équipé de deux à douze, de préférence de huit buses à oxygène (8).
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les buses à oxygène (8) forment un cercle de référence (9), dans lequel la distance radiale minimale (A) entre le canal central d'arrivée de combustible (4) et les buses à oxygène (8) présente une valeur de 2,5 à 32 fois la valeur du diamètre (b) de la buse à oxygène (8).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la chambre de mélange (10) est raccordée à la chambre de combustion (11) formée dans la brique de brûleur principale (1) par une sortie (6) formée dans la brique de brûleur supplémentaire (2).
  5. Procédé selon la revendication 4, caractérisé en ce que la longueur (e) de la chambre de mélange (10) vaut 1,2 à 2,5 fois le diamètre de chambre de mélange (d) de la sortie (6) de la brique de brûleur supplémentaire (2).
  6. Procédé selon la revendication 4, caractérisé en ce que la longueur (L) de la chambre de combustion (11) vaut 0,05 à 0,6 fois le diamètre (f) de la chambre de combustion (11) de la sortie (7) formée dans la brique de brûleur principale (1).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le canal central d'arrivée de combustible (4) est équipé d'un capteur (12), de préférence d'un récepteur de lumière UV, pour surveiller la flamme, relié à une unité d'évaluation.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la brique de brûleur principale et la brique de brûleur supplémentaire (1, 2) sont constituées d'un matériau résistant à la chaleur et à la corrosion, de préférence de céramique.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le canal de combustible (4) et les canaux d'arrivée d'oxygène (5) ainsi que les buses à oxygène (8) sont constitués d'un matériau résistant à la chaleur et à la corrosion, de préférence d'un alliage NiCr ou ODS.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps de brûleur (3) est assemblé solidairement à la brique de brûleur principale (1), de préférence par un assemblage vissé.
EP05761664.1A 2004-07-14 2005-07-12 Procédé pour faire fonctionner un brûleur oxycombustible Active EP1789726B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034212A DE102004034212A1 (de) 2004-07-14 2004-07-14 Brennstoff-Sauerstoff-Brenner und Verfahren zum Betreiben des Brenners
PCT/EP2005/007549 WO2006005577A1 (fr) 2004-07-14 2005-07-12 Bruleur oxycombustible et procede pour faire fonctionner ce dernier

Publications (2)

Publication Number Publication Date
EP1789726A1 EP1789726A1 (fr) 2007-05-30
EP1789726B1 true EP1789726B1 (fr) 2019-04-10

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ID=34981213

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Application Number Title Priority Date Filing Date
EP05761664.1A Active EP1789726B1 (fr) 2004-07-14 2005-07-12 Procédé pour faire fonctionner un brûleur oxycombustible

Country Status (5)

Country Link
EP (1) EP1789726B1 (fr)
DE (1) DE102004034212A1 (fr)
ES (1) ES2728598T3 (fr)
HU (1) HUE043692T2 (fr)
WO (1) WO2006005577A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT506042A1 (de) 2007-11-13 2009-05-15 Siemens Vai Metals Tech Gmbh Verfahren zum schmelzen von roheisen und stahlvorprodukten in einem schmelzvergaser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51109527A (ja) * 1975-12-24 1976-09-28 Nippon Musical Instruments Mfg Gasubaana
DE10160325A1 (de) * 2001-12-07 2003-06-26 Messer Griesheim Gmbh Mit flüssigem Brennstoff betriebener Flachflammenbrenner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4378205A (en) * 1980-04-10 1983-03-29 Union Carbide Corporation Oxygen aspirator burner and process for firing a furnace
JPS57155014A (en) * 1981-03-20 1982-09-25 Nippon Sanso Kk Gas fuel burner
US4475885A (en) * 1983-07-28 1984-10-09 Bloom Engineering Company, Inc. Adjustable flame burner
CA2254978C (fr) * 1996-05-17 2008-09-09 Xothermic, Inc. Bruleur et procede

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51109527A (ja) * 1975-12-24 1976-09-28 Nippon Musical Instruments Mfg Gasubaana
DE10160325A1 (de) * 2001-12-07 2003-06-26 Messer Griesheim Gmbh Mit flüssigem Brennstoff betriebener Flachflammenbrenner

Also Published As

Publication number Publication date
WO2006005577A1 (fr) 2006-01-19
ES2728598T3 (es) 2019-10-25
HUE043692T2 (hu) 2019-09-30
DE102004034212A1 (de) 2006-02-16
EP1789726A1 (fr) 2007-05-30

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