WO2006005577A1 - Fuel-oxygen burner and method for the operation thereof - Google Patents

Fuel-oxygen burner and method for the operation thereof Download PDF

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Publication number
WO2006005577A1
WO2006005577A1 PCT/EP2005/007549 EP2005007549W WO2006005577A1 WO 2006005577 A1 WO2006005577 A1 WO 2006005577A1 EP 2005007549 W EP2005007549 W EP 2005007549W WO 2006005577 A1 WO2006005577 A1 WO 2006005577A1
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WO
Grant status
Application
Patent type
Prior art keywords
burner
fuel
oxygen
oxy
block
Prior art date
Application number
PCT/EP2005/007549
Other languages
German (de)
French (fr)
Inventor
Martin William Adendorff
Heinz Franke
Horst KÖDER
Original Assignee
Messer Group Gmbh
Air Liquide Deutschland Gmbh
L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation
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

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22Non-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/32Burners 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, 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
    • F23M5/00Casings; Linings; Walls
    • F23M5/02Casings; Linings; Walls characterised by the shape of the bricks or blocks used
    • F23M5/025Casings; Linings; Walls characterised by the shape of the bricks or blocks used specially adapted for burner openings

Abstract

Disclosed is a fuel-oxygen burner that is used for combustion processes producing low amounts of harmful substances (NOx) in the high temperature range. Said fuel-oxygen burner comprises a burner body (3) that is disposed in a main burner block (1) encompassing an additional burner block (2) and is provided with at least one fuel conduit (4) extending into a mixing chamber (10) of the additional burner block (2) as well as oxygen conduits (5) which are guided through the additional burner block (2) and extend into a combustion chamber (11) of the main burner block (1). The inventive fuel-oxygen burner is characterized in that the central axis of the fuel conduit (4) is located on the central axis of the main burner block (1) while the oxygen nozzles (8) are disposed in a partial circle around the central fuel conduit (4). Said fuel-oxygen burner is particularly suitable for the economical and ecologically friendly operation of industrial furnaces, above all melting furnaces, and most advantageously ash furnaces.

Description

Oxy-fuel burner and method of operating the burner

The invention relates to an oxy-fuel burner for a low-pollutant combustion in a high temperature range according to the preamble of claim 1 and a method for operating the burner according to the preamble of claim 11,

In combustion processes at high temperatures, such as in furnaces, particularly in glass melting furnaces, conventional oxy-fuel burners are used currently. In US 4,378,205, such a burner is described in which a central fuel supply, a primary, as an arranged around the fuel feed around ring main oxygen supply line running and a plurality of secondary oxygen supply lines are axially parallel passed through a burner block and open out on the end face. The in these, with technical oxygen

Oxidant performed combustion processes occurring high flame temperatures often the TA-Luft limits result in excess nitrogen oxide (NO x) -Schadstoffbelastungen. An improved burner is described in EP 0898687 B1. In this burner open a fuel supply, and four, with respect to the axis of the central

Fuel supply angled primary and secondary oxygen lines a to the end face of a burner block having a square cross-section. However, this burner also shows insufficient levels of pollutants during operation. To the damaging environmental NO x -Schadstoffemissionen in combustion processes at high temperatures, for. Example, in glass melting processes with Prozess¬ temperatures greater than 1400 ° C, to reduce, therefore be used cost-intensive de- NO x systems.

Object of the present invention is therefore to provide a fuel-oxygen burners are available with which an economic and low-pollution (low NOx) combustion at high temperatures is possible. This object is achieved by a fuel-oxygen burner with the features of claim 1 and by a method for operating the burner with the features of claim. 11

Advantageous developments of the invention are specified in the subclaims.

According to the invention a fuel oxygen burner is used, the recirculating with tonnage oxygen as an oxidizing agent or with a predominantly oxygen-containing oxidizing agent in the presence of

Combustion gases is operated. Of the low-pollutant combustion in a high temperature range, preferably in melting furnaces, particularly advantageous in glass melting furnaces, usable burner with a arranged in a main burner block with additional burner block burner body having at least one opening into a mixing chamber of the auxiliary burner tile fuel-supplying passage and guided by the auxiliary burner block and into a combustion chamber of the main burner block opening out oxygen feed channels is characterized in that the central axis of the fuel delivery channel on the central axis of the main burner tile and the oxygen nozzles are arranged around the central fuel supply passage on a pitch circle.

The burner includes a plurality, preferably two to twelve, particularly advantageously eight oxygen nozzles. The pitch circle formed by the oxygen nozzles has a minimum distance A of the central fuel supply channel, which is a

Several times the nozzle diameter is preferably 2.5 to 32 times the nozzle diameter.

Preferably, the mixing chamber of the auxiliary burner tile opens out through an outlet in the combustion chamber of the main burner tile. both the

Mixing chamber of the auxiliary burner tile and the combustion chamber are cylindrical in shape at least over part of their longitudinal extent substantially, preferably circular cylindrical shape is formed. This burner design according to the invention enables the oxygen with a 2.5- to 3.3-fold speed higher than the fuel flows into the combustion chamber of the burner, whereby in respect of at the burner power total pulse current of 15 to 25 N / MW and a ratio of ensures pulse current densities of oxygen and fuel of 5 to 15 and characterized a power density is reached 0.05 to 2 KW / mm 2 at the outlet of the main burner stone.

Advantageously, the length of the formed in the auxiliary burner stone circular cylindrical mixing chamber, the 1, 2 to 2.5 times of the chamber diameter and the length of the formed in the main burner block circular-cylindrical combustion chamber is 0.05 to 0.6 times the diameter of the exit from the main burner stone.

The fuel-supplying passage is advantageously equipped with a connected to an evaluation unit sensor, for example, a suitably arranged for flame monitoring UV-light receiver.

The main and auxiliary burner block are expediently each consist of a heat- and corrosion-resistant material, preferably of ceramic. It is also possible to produce main and auxiliary burner block in one piece. The burner body and the fuel-oxygen feed channels as well as the oxygen nozzles consist of a heat- and corrosion-resistant material, preferably from an NiCr or ODS alloy.

The burner body is preferably fixedly connected to the main burner block so that it is ensured at the main burner block a seal between the main burner block and said burner body, and thus a secure attachment of the burner body, preferably by means of a screw connection.

The for a low-emission (low NOx) high-temperature combustion, in particular in furnaces, particularly beneficial in glass melting furnaces, which can be used oxy-fuel burner is structurally simple and therefore cost to the different operating conditions easily adaptable and can with technical oxygen as the oxidant as well be operated with an oxygen-containing oxidizing agent. As fuel, all conventional gaseous or liquid fuels, particularly advantageously natural gas, can be used.

The invention with reference to an embodiment shown in the drawing will be further explained.

In the schematic views show:

FIG. 1 is disposed in a section through a main burner block inventive oxy-fuel burner;

Fig. 2 is the view X of the fuel outlet of the fuel-oxygen burner of FIG. 1.

The burner shown in Fig. 1 shows a arranged in a main burner block 1 with additional burner block 2 metallic burner body 3. The Zusatz¬ burner block 2 is received in a recess or bore of the main burner tile 1. The burner body 3 contains a with its central axis disposed on the central axis of the main burner stone 1 supplying passage 4 for fuel, which leads into a cylindrically-shaped in the auxiliary burner block 2 mixing chamber 10, the at least one trained auxiliary burner block 2 outlet 6 with a likewise cylindrical, in the main burner block 1 is connected to outlet 7 formed combustion chamber. 11 Around the central fuel supply duct 4 around a plurality of through the addition burner block 2 guided and each having an opening out substantially axially parallel to the central supply duct 4 into the combustion chamber 11 nozzle 8 provided supply channels 5 are arranged for the used as an oxidizing agent is oxygen. FIG. 1 is further seen that the length e of the mixing chamber 10, the 1, 2 to 2.5 times the diameter d and the length L of the combustion chamber 1 1 0.05 to 0.6 times the f is the diameter.

In FIG. 2, an eight oxygen nozzles 8 and a central supply duct 4 equipped for fuel oxy-fuel burner is illustrated. The arranged on a pitch circle oxygen nozzles 8 have a minimum distance A of the central fuel supply duct 4, the fold 32 is 2.5 to the nozzle diameter b. The arranged with its burner body 3 in a main burner block 1 with additional burner block 2 oxy-fuel burner is supplied as fuel and oxygen as the oxidant gas.

The said central feed channel 4 fed natural gas flowing at a rate of 60 to 90 m / s in the formed in the auxiliary burner block 2 mixing chamber 10 and through the outlet 6 in the formed in the main burner block 1 combustion chamber. 11

Of each feed channel 5 of the burner supplied oxygen flows at a rate of 70 to 100 m / s followed by an oxygen flow constricting nozzle 8 into the combustion chamber 11 a.

According to the invention the oxygen with a 2.5- to 3.3-times faster than the gas flowing into the combustion chamber. 11

The flowed into the combustion chamber 11 of the main burner tile 1, fuel is partially combusted with the flowed into the combustion chamber 11 oxygen It forms a stable flame which emits a sufficient signal for an intended in the exemplary embodiment sensor 12, preferably a UV light receiver, the monitoring the flame of the burner is arranged in the fuel supply duct 4 and is connected to an evaluation unit not shown here.

Due to the inventive burner design is an oriented on the burner power total pulse current of 15 to 25 N / MW, with a ratio of the momentum flux densities of oxygen and fuel of 5 to 15 and thus a power density of 0.05 to 2 KW / mm2 at the outlet 7 of the main burner tile 1 reaches the fuel-oxygen burner.

The main and auxiliary burner block 1 and 2 are in the exemplary embodiment are each made of a ceramic material, the burner body 3, the feed channels 4, 5 and the oxygen nozzles 8 from 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 the burner body 3 and a secure attachment of the burner body 3 is ensured to the main burner block. 1 In the exemplary embodiment is provided as a fastening a 4-fold

Screw connection consisting provided of a threaded bolt 14, a nut 16, a backstop 15 and a gasket. 13

With the present invention, a power range from 10 to 9000 kW, preferably 100 to 3000 kW, and having "G-burner" referred to as Brenner were obtained experimental results as listed below:

Test results:

"NOx concentrations from the furnace off-gas in ppm as a function of P rozesste m pe ratu r":

Conventional G-average burner

Furnace wall temperature burner

1200 0 C 337-767 38

1400 0 C 390-1044 63

1550 0 C 430-1180 95

The indicated in the above table NOx values ​​refer to 3 vol .-% residual oxygen in the exhaust gas, a N2 concentration of 1 vol .-% in the natural gas H, a furnace pressure of 0.3 mbar and a burner capacity of 700 KW , The concentrations of the furnace exhaust gas relating to dry analytical gas. Bezuqszeichenaufstellunq

1 Haυptbrennerstein

2 additional burner block

3 burner body

4 supply channel (natural gas)

5 supply passage (oxygen)

6 outlet (2)

7 the outlet (1)

8 oxygen nozzle

9 pitch

10 mixing chamber (2)

11 combustion chamber (1)

12 sensor

13 sealing

14 threaded bolts

15 counter-holder

16 mother

Claims

claims
1. oxy-fuel burner disposed for low-pollutant combustion in the high-temperature region, with a in a main burner block (1) with additional burner block (2) burner body (3) opening out at least one in a mixing chamber (10) of the additional burner tile (2) fuel supply channel opening out (4) and with the addition burner block (2) guided and in a combustion chamber (11) of the main burner tile (1) oxygen-feed channels (5) with oxygen nozzles (8), wherein the central axis of the fuel delivery channel (4) on the central axis of the main burner tile (1) and the oxygen nozzles (8) around the central fuel supply channel (4) on a pitch circle (9) are arranged.
2. oxy-fuel burner according to claim 1, characterized in that the fuel-oxygen burner is equipped with two to twelve, preferably eight oxygen nozzles (8).
3. oxy-fuel burner according to one of the preceding claims, characterized in that the oxygen nozzles (8) form part of a circle (9), wherein the minimum radial distance (A) between the central
Fuel supply duct (4) and the oxygen nozzles (8) a 2.5 to 32 - times the value of the diameter (b) of the oxygen nozzle (8).
4. oxy-fuel burner according to one of the preceding claims, characterized in that the mixing chamber (10) is formed by a in the auxiliary burner block (2), outlet (6) with the main burner block (1) formed combustion chamber (11).
5. oxy-fuel burner according to claim 4, characterized in that the length (e) (2 of the mixing chamber (10) the 1, 2 to 2.5 times the mixing chamber diameter (d) of the outlet (6) of the additional burner block ) is.
6. oxy-fuel burner according to claim 4, characterized in that the length (L) of the combustion chamber (11) is 0.05 to 0.6 times the diameter (f) of the combustion chamber (11) of the is main burner block (1) formed outlet (7).
7. oxy-fuel burner according to one of the preceding claims, characterized in that the fuel-feed duct (4) with a connected evaluation unit for flame monitoring with a sensor (12), preferably a UV light receiver, is provided.
8. oxy-fuel burner according to one of the preceding claims, characterized in that the main and auxiliary burner brick (1, 2) consist of a heat- and corrosion-resistant material, preferably of ceramic.
9. oxy-fuel burner according to one of the preceding claims, characterized in that the fuel channel (4) and the
Oxygen supply channels (5) and the oxygen nozzles (8) made of a heat- and corrosion-resistant material, preferably, consist of an NiCr or ODS alloy.
10. oxy-fuel burner according to the previous
Characterized claims in that the burner body (3) to the main burner block (1) fixed, preferably connected by a threaded connection.
11. A method of operating an oxy-fuel burner according to one of the preceding claims, wherein the fuel with an oxygen-containing oxidant in the presence of recirculating combustion gases is oxidiβrt, characterized in that a) the oxidizing agent with a 2.5 to 3.3 -fold higher speed than the fuel through the outlet (6) of
Additional burner block (2) into the combustion chamber (11) flows, b) a related to the oxy-fuel burner power total pulse current of 15 to 25 N / MW is established, c) the ratio of the momentum flux densities of oxygen and fuel between 5 to 15 and d) a power density (at the outlet 7) of the
Main burner block (1) is adjusted between 0.05 to 2 KW / mm2.
12. Use of a fuel-oxygen burner to the preceding claims in a melting furnace, preferably in a glass melting furnace.
PCT/EP2005/007549 2004-07-14 2005-07-12 Fuel-oxygen burner and method for the operation thereof WO2006005577A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200410034212 DE102004034212A1 (en) 2004-07-14 2004-07-14 Oxy-fuel burner and method of operating the burner
DE102004034212.1 2004-07-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20050761664 EP1789726A1 (en) 2004-07-14 2005-07-12 Fuel-oxygen burner and method for the operation thereof

Publications (1)

Publication Number Publication Date
WO2006005577A1 true true WO2006005577A1 (en) 2006-01-19

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ID=34981213

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/007549 WO2006005577A1 (en) 2004-07-14 2005-07-12 Fuel-oxygen burner and method for the operation thereof

Country Status (3)

Country Link
EP (1) EP1789726A1 (en)
DE (1) DE102004034212A1 (en)
WO (1) WO2006005577A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062611A1 (en) * 2007-11-13 2009-05-22 Siemens Vai Metals Technologies Gmbh & Co Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155014A (en) * 1981-03-20 1982-09-25 Nippon Sanso Kk Gas fuel burner
US4378205A (en) * 1980-04-10 1983-03-29 Union Carbide Corporation Oxygen aspirator burner and process for firing a furnace
US4475885A (en) * 1983-07-28 1984-10-09 Bloom Engineering Company, Inc. Adjustable flame burner
EP0898687A1 (en) * 1996-05-17 1999-03-03 Xothermic, Inc. Burner apparatus and method

Patent Citations (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
EP0898687A1 (en) * 1996-05-17 1999-03-03 Xothermic, Inc. Burner apparatus and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 260 (M - 180) 18 December 1982 (1982-12-18) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062611A1 (en) * 2007-11-13 2009-05-22 Siemens Vai Metals Technologies Gmbh & Co Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier
US8313552B2 (en) 2007-11-13 2012-11-20 Siemens Vai Metals Technologies Gmbh Method for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier

Also Published As

Publication number Publication date Type
EP1789726A1 (en) 2007-05-30 application
DE102004034212A1 (en) 2006-02-16 application

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