US20080131827A1 - Gas Injector - Google Patents
Gas Injector Download PDFInfo
- Publication number
- US20080131827A1 US20080131827A1 US10/593,946 US59394605A US2008131827A1 US 20080131827 A1 US20080131827 A1 US 20080131827A1 US 59394605 A US59394605 A US 59394605A US 2008131827 A1 US2008131827 A1 US 2008131827A1
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- US
- United States
- Prior art keywords
- gas
- mouth
- central nozzle
- gas injector
- supply pipe
- 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.)
- Abandoned
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Classifications
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- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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- 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
- F23C5/02—Structural details of mounting
- F23C5/06—Provision for adjustment of burner position during operation
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- 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
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- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
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- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
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- 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
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/07021—Details of lances
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- the invention relates to a gas burner or gas injector having a diffuser, which by control actuations can be modified within wide limits as a free jet burner and is suitable in particular for industrial furnaces with regenerative air preheating, in particular those which have an air supply arranged separately from the fuel gas.
- DE 195 20 650 A1 discloses burner-nozzle block combinations while DE 102 24 769 discloses free jet burners with an opening angle around 200 and a minimum mouth diameter of 70 mm in a cylindrical burner insert bore without subsequently arranged nozzle block, which, by virtue of low-turbulence introduction of fuel gas, produce delayed mixing of fuel gas and combustion air and have achieved acceptable NOx-reduction effects, with reduced flame root temperatures in individual applications, with respect to the starting level.
- Structures as in DE 102 24 769 do not have any possible ways of reacting to fluctuations in throughput in the typical output range but are equipped with turbulence-generating central nozzles which, bearing against the gas supply pipe internally, are operative only in the forward position and there cause rapid distancing from the NOx-reducing mode of operation. Solely reducing the cross-section of the diffuser root is not sufficient to adapt the technologically required flame shape in direction and length to changed fuel throughputs.
- the problem which arises is that the gas discharge speed falls drastically, whereby the separately supplied combustion air, by virtue of its markedly higher impulsion and momentum, can interfere with the gas jet in such a way that the free jet characteristic is lost and the desired positioning of the flame in relation to the material to be heated, which is determined by direction and length, can no longer be actively influenced.
- the combustion air sucks the fuel gas out of the injector mouth and the originally intended delayed mixing and starting reaction already starts directly at the breakaway edge of the combustion air supply.
- EP 0 513 414 B1 discloses apparatuses which provide for different flow conditions by means of axially displaceable conical nozzles directly at the main discharge nozzle.
- the object of the invention is to avoid the disadvantages of the known procedures but at the same time maintain the advantages of the undisturbed free jet with a simultaneous enlargement in the working range.
- the concept of the invention in terms of the design configuration of the injector is based on the diameter ratio of the diffuser and the introduction of a double free jet procedure.
- the novel concept of closely restricting the diameter ratio of the mouth and the feed pipe it is possible in virtually every situation of use to impart a low-turbulence free jet characteristic to the flow of gas in a very short time, without having to tolerate the above-mentioned disadvantages.
- the characteristics of the long diffuser are not determined and limited by absolute dimensions of the mouth but represent conditions in respect of the fuel gas supply, which are optimum in terms of flow technology, in wide ranges. Time-consuming trial-and-error processes for determining the optimum operating point are eliminated and the parameters can be easily transposed to other installations.
- FIG. 1 shows a lateral view in section of the front part of a gas injector according to the invention which is fitted into a burner insert opening
- FIG. 2 shows a view in section through the entire gas injector according to the invention with a first embodiment of a closure and regulating device
- FIG. 3 shows a view in section through the entire gas injector according to the invention with a second embodiment of a closure and regulating device.
- FIG. 1 shows the position of a gas injector according to the invention which is determined by the position of the mouth of a long diffuser 3 at the end of a burner insert opening 6 .
- the gas injector according to the invention is provided with a gas supply pipe 1 and a mouth 2 , wherein the communication between the gas supply pipe 1 and the mouth 2 forms the long diffuser 3 with a free jet opening angle.
- the configuration according to the invention of the long diffuser 3 determined by the diameter ratio of the gas supply pipe 1 and the mouth 2 which is less than three, ensures low-turbulence introduction of fuel in a wide range of uses.
- the stability and flexibility of the low-turbulence fuel supply is enhanced to a high degree by the introduction of a second free jet in the root of the diffuser 3 . That is implemented by a central nozzle pipe 4 , the mouth of which is also in the form of a free jet opening angle, preferably of about 20°.
- the notional prolongation 7 of the generatrix of the mouth 8 of the central nozzle pipe 4 goes directly into the generatrix of the long diffuser 3 .
- the central nozzle pipe 4 is preferably arranged in the gas supply pipe 1 , providing an annular gap 9 between the central nozzle pipe 4 and the inside periphery of the gas supply pipe 1 .
- a closure and regulating device 11 or 16 for regulating the partial flows through the central nozzle pipe 4 and the annular gap 9 . That permits an additional modification in the ratio of the partial flows through the central nozzle pipe 4 and the annular gap 9 and permits the setting of a low-turbulence free jet at the most widely varying fuel throughput rates as division of the partial flows occurs at such a distance relative to the mouth 8 that both pass in a low-turbulence condition into the long diffuser 3 and thus, in spite of differing input parameters, deploy the full heat transfer efficiency and NOx-reduction effect.
- the arrangement of a water-cooled ring 5 which protects the mouth 2 which is mostly made entirely of metal and air-cooled from thermal wear also has a stabilising and flexibility-enhancing effect.
- Cooling water connections 14 lead the coolant to the mouth region of the injector.
- the water-cooled ring 5 is closed by a partition between the feed and return of the cooling water connection 14 , whereby the cooling water flows once through the hollow body of the ring and issues again.
- the mouth cooling ring 5 forms an admittedly contact-free but close closure relative to the burner insert opening 6 and thus prevents unwanted ingress of infiltration air.
- the burner insert opening 6 is preferably of a conically tapered configuration in the flow direction so that vertical and horizontal angular deflection of the entire injector in the free space 10 disposed therebehind becomes possible so that the direction and position of the fuel free jet can be determined relative to the incoming combustion air and relative to the material being heated.
- the provision of a burner insert opening 6 which conically tapers in the flow direction ensures and expands the specific use of the free space 10 as an optimisation parameter without interfering with the outflowing free jet, as is known from previous burner-nozzle block combinations.
- the water-cooled ring 5 is preferably rotatable about the axis of the injector, whereby the cooling water connection 14 can be respectively mounted in the part of the free space 10 , which is not involved in the angular deflection.
- Division of the partial flows which is provided in accordance with a preferred embodiment in the central nozzle pipe 4 and the annular gap 9 between the gas supply pipe 10 and the central nozzle pipe 4 can be effected within or outside the gas supply pipe 1 , with suitable closure and regulating devices being provided for that purpose.
- FIG. 2 shows regulation within the gas supply pipe 1 .
- an axially displaceable cone 11 Arranged between the gas pipe 1 and the central nozzle pipe 4 is an axially displaceable cone 11 which co-operates with an inclined surface of the inside wall of the gas supply pipe 1 and which can regulate the annular gap 9 between the two and in the extreme setting completely close it.
- Axial displacement of the cone 11 can be effected by way of a spindle 12 or other suitable devices which are set in movement by a spindle drive 13 .
- Complete closure of the annular gap 9 represents the lower working point of the injector, that is to say 100% of the gas flow flows through the central nozzle pipe 4 .
- Complete opening of the annular gap 9 by retraction of the cone 11 in opposite relation to the flow direction represents the upper working point with full fuel throughput.
- the intermediate positions can be steplessly set by displacement of the cone 11 .
- a secondary gas supply pipe 15 branches off an overall gas supply 17 which opens into the gas supply pipe 1 , and directly charges the central nozzle pipe 4 .
- a valve 16 Disposed in each of the two supply conduits is a valve 16 for adjusting the respective partial gas flow. Both partial flows, both that through the annular gap 9 and also that through the central nozzle pipe 4 , can be 100% shut off by the separately arranged valves 16 and can be steplessly adjusted therebetween. Other closure and regulating devices are possible.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention relates to a gas burner or gas injector having a diffuser, which by control actuations can be modified within wide limits as a free jet burner and is suitable in particular for industrial furnaces with regenerative air preheating, in particular those which have an air supply arranged separately from the fuel gas. The gas injector according to the invention has a gas supply pipe 1 and a mouth 2, wherein the connection thereof forms a long diffuser 3 with a free jet opening angle, and is characterised in that the ratio of the diameter of the mouth 2 and the diameter of the gas supply pipe 1 is smaller than three. Preferably a central nozzle pipe 4 with a mouth 8 forming a free jet opening angle is arranged within the gas supply pipe 1, forming an annular gap 9 for guiding a partial gas flow between the gas supply pipe 1 and the central nozzle pipe 4, in such a way that the notional prolongation of the generatrix 7 of the central nozzle pipe mouth 8 goes into the generatrix of the long diffuser 3. A closure and regulating device is provided for regulating the partial flows.
Description
- The invention relates to a gas burner or gas injector having a diffuser, which by control actuations can be modified within wide limits as a free jet burner and is suitable in particular for industrial furnaces with regenerative air preheating, in particular those which have an air supply arranged separately from the fuel gas.
- It is known that primary NOx-reducing measures in relation to conventionally heated high temperature tank furnaces, in particular in relation to glass melting tank furnaces, are particularly effective in relation to the technology of introducing fuel. Admittedly major efforts have been undertaken in order to optimise furnace geometry and the design of the combustion air supply in terms of pollutant emissions, but not least by virtue of the long installation service lives of more than 10 years in which structural conditions are fixed, those measures are only very late in taking effect, they are greatly limited in terms of their number and misguided developments can only be reversed after the end of the furnace campaign. It is also known that primary NOx-reducing measures, if technologically correctly applied, are linked to an energy saving, an increase in output, a prolongation of service life and quality assurance, but also require a degree of sensor system and intelligent automation as well as attentiveness on the part of the operating personnel in order to maintain the high level attained in respect of effectiveness and pollution reduction.
- In accordance with the basic idea of NOx-reduction in relation to high temperature processes like glass melting, DE 195 20 650 A1 discloses burner-nozzle block combinations while DE 102 24 769 discloses free jet burners with an opening angle around 200 and a minimum mouth diameter of 70 mm in a cylindrical burner insert bore without subsequently arranged nozzle block, which, by virtue of low-turbulence introduction of fuel gas, produce delayed mixing of fuel gas and combustion air and have achieved acceptable NOx-reduction effects, with reduced flame root temperatures in individual applications, with respect to the starting level.
- Structures as in DE 102 24 769 do not have any possible ways of reacting to fluctuations in throughput in the typical output range but are equipped with turbulence-generating central nozzles which, bearing against the gas supply pipe internally, are operative only in the forward position and there cause rapid distancing from the NOx-reducing mode of operation. Solely reducing the cross-section of the diffuser root is not sufficient to adapt the technologically required flame shape in direction and length to changed fuel throughputs.
- With a low throughput the problem which arises is that the gas discharge speed falls drastically, whereby the separately supplied combustion air, by virtue of its markedly higher impulsion and momentum, can interfere with the gas jet in such a way that the free jet characteristic is lost and the desired positioning of the flame in relation to the material to be heated, which is determined by direction and length, can no longer be actively influenced. In an extreme case the combustion air sucks the fuel gas out of the injector mouth and the originally intended delayed mixing and starting reaction already starts directly at the breakaway edge of the combustion air supply. The advantage of the previously known solution, namely arranging the injector mouth without subsequently arranged burner nozzle block in the combustion chamber in order to avoid contact of the intermittently supplied fuel gas with the refractory material, as occurs in the construction of DE 195 20 650 A1, is thus nullified.
- EP 0 513 414 B1 discloses apparatuses which provide for different flow conditions by means of axially displaceable conical nozzles directly at the main discharge nozzle.
- Solutions as in EP 0 513 414 B1 suffer from the disadvantage that the gas jet which is to be set with complicated and expensive conical nozzles does not have the discharge paths which are required for optimum delayed mixing, and the downstream-disposed nozzle block additionally causes turbulence.
- The technology of introducing fuel gas, relative to the air supply which has long been structurally fixed, suffers in the case of the known solutions from in part considerable disadvantages which give rise to risks in regard to the refractory material and thus the product quality and the installation service life or which allow an NOx-reducing mode of operation in an only narrow range.
- Thus the known solutions can no longer meet the increased demands in terms of quality of heat transmission of the flame to the material to be heated, the degree of NOx reduction and the flexibility of firing of a modern production installation. With an increasing approach to the thermodynamic optimum of heat transfer and pollution reduction, there is an increasing need for simple, manageable and reproducible instruments, keeping that optimum stable and fully transforming the advantages into economic and ecological benefits.
- Therefore the object of the invention is to avoid the disadvantages of the known procedures but at the same time maintain the advantages of the undisturbed free jet with a simultaneous enlargement in the working range.
- In accordance with the invention that object is attained by a gas injector having the features of claim 1. Advantageous configurations of the invention are set forth in the appendant claims.
- In that respect the concept of the invention in terms of the design configuration of the injector is based on the diameter ratio of the diffuser and the introduction of a double free jet procedure. With the novel concept of closely restricting the diameter ratio of the mouth and the feed pipe, it is possible in virtually every situation of use to impart a low-turbulence free jet characteristic to the flow of gas in a very short time, without having to tolerate the above-mentioned disadvantages. The characteristics of the long diffuser are not determined and limited by absolute dimensions of the mouth but represent conditions in respect of the fuel gas supply, which are optimum in terms of flow technology, in wide ranges. Time-consuming trial-and-error processes for determining the optimum operating point are eliminated and the parameters can be easily transposed to other installations. In tests which were conducted the running-in phases of several months could be reduced to a few weeks. In particular the risks to the refractory material which can occur due to improved heat transfer and the accompanying reduction in fuel throughput and reduction in the gas impulsion and momentum are excluded. Adverse effects such as washing-out phenomena and surface spalling effects which only become apparent after between 1 and 2 years can thus be avoided.
- The invention is described in greater detail hereinafter by means of an embodiment with reference to the drawings in which:
-
FIG. 1 shows a lateral view in section of the front part of a gas injector according to the invention which is fitted into a burner insert opening, -
FIG. 2 shows a view in section through the entire gas injector according to the invention with a first embodiment of a closure and regulating device, and -
FIG. 3 shows a view in section through the entire gas injector according to the invention with a second embodiment of a closure and regulating device. -
FIG. 1 shows the position of a gas injector according to the invention which is determined by the position of the mouth of along diffuser 3 at the end of a burner insert opening 6. The gas injector according to the invention is provided with a gas supply pipe 1 and amouth 2, wherein the communication between the gas supply pipe 1 and themouth 2 forms thelong diffuser 3 with a free jet opening angle. The configuration according to the invention of thelong diffuser 3, determined by the diameter ratio of the gas supply pipe 1 and themouth 2 which is less than three, ensures low-turbulence introduction of fuel in a wide range of uses. - The stability and flexibility of the low-turbulence fuel supply is enhanced to a high degree by the introduction of a second free jet in the root of the
diffuser 3. That is implemented by a central nozzle pipe 4, the mouth of which is also in the form of a free jet opening angle, preferably of about 20°. The notional prolongation 7 of the generatrix of themouth 8 of the central nozzle pipe 4 goes directly into the generatrix of thelong diffuser 3. In that case the central nozzle pipe 4 is preferably arranged in the gas supply pipe 1, providing anannular gap 9 between the central nozzle pipe 4 and the inside periphery of the gas supply pipe 1. Preferably there is also a closure and regulatingdevice annular gap 9. That permits an additional modification in the ratio of the partial flows through the central nozzle pipe 4 and theannular gap 9 and permits the setting of a low-turbulence free jet at the most widely varying fuel throughput rates as division of the partial flows occurs at such a distance relative to themouth 8 that both pass in a low-turbulence condition into thelong diffuser 3 and thus, in spite of differing input parameters, deploy the full heat transfer efficiency and NOx-reduction effect. - The arrangement of a water-cooled
ring 5 which protects themouth 2 which is mostly made entirely of metal and air-cooled from thermal wear also has a stabilising and flexibility-enhancing effect.Cooling water connections 14 lead the coolant to the mouth region of the injector. The water-cooledring 5 is closed by a partition between the feed and return of thecooling water connection 14, whereby the cooling water flows once through the hollow body of the ring and issues again. At the same time themouth cooling ring 5 forms an admittedly contact-free but close closure relative to the burner insert opening 6 and thus prevents unwanted ingress of infiltration air. Theburner insert opening 6 is preferably of a conically tapered configuration in the flow direction so that vertical and horizontal angular deflection of the entire injector in thefree space 10 disposed therebehind becomes possible so that the direction and position of the fuel free jet can be determined relative to the incoming combustion air and relative to the material being heated. The provision of a burner insert opening 6 which conically tapers in the flow direction ensures and expands the specific use of thefree space 10 as an optimisation parameter without interfering with the outflowing free jet, as is known from previous burner-nozzle block combinations. In order to ensure full availability of thefree space 10 for angular deflection of the injector, the water-cooledring 5 is preferably rotatable about the axis of the injector, whereby thecooling water connection 14 can be respectively mounted in the part of thefree space 10, which is not involved in the angular deflection. - Division of the partial flows which is provided in accordance with a preferred embodiment in the central nozzle pipe 4 and the
annular gap 9 between thegas supply pipe 10 and the central nozzle pipe 4 can be effected within or outside the gas supply pipe 1, with suitable closure and regulating devices being provided for that purpose. -
FIG. 2 shows regulation within the gas supply pipe 1. Arranged between the gas pipe 1 and the central nozzle pipe 4 is an axiallydisplaceable cone 11 which co-operates with an inclined surface of the inside wall of the gas supply pipe 1 and which can regulate theannular gap 9 between the two and in the extreme setting completely close it. Axial displacement of thecone 11 can be effected by way of aspindle 12 or other suitable devices which are set in movement by aspindle drive 13. Complete closure of theannular gap 9 represents the lower working point of the injector, that is to say 100% of the gas flow flows through the central nozzle pipe 4. Complete opening of theannular gap 9 by retraction of thecone 11 in opposite relation to the flow direction represents the upper working point with full fuel throughput. The intermediate positions can be steplessly set by displacement of thecone 11. - In the second case which is shown in
FIG. 3 the overall gas flow is divided by conduit means before passing into the gas supply pipe 1. A secondary gas supply pipe 15 branches off anoverall gas supply 17 which opens into the gas supply pipe 1, and directly charges the central nozzle pipe 4. Disposed in each of the two supply conduits is avalve 16 for adjusting the respective partial gas flow. Both partial flows, both that through theannular gap 9 and also that through the central nozzle pipe 4, can be 100% shut off by the separately arrangedvalves 16 and can be steplessly adjusted therebetween. Other closure and regulating devices are possible. -
- 1 gas supply pipe
- 2 mouth long diffuser
- 3 long diffuser
- 4 central nozzle pipe
- 5 water-cooled ring
- 6 burner insert opening
- 7 notional prolongation of the generatrix of the central nozzle pipe
- 8 mouth central nozzle pipe
- 9 annular gap
- 10 free space
- 11 cone
- 12 spindle
- 13 spindle drive
- 14 cooling water connection
- 15 secondary gas supply pipe
- 16 valve
- 17 overall gas supply
Claims (12)
1. A gas injector for nitrogen oxide-reducing firing of regeneratively heated industrial furnaces comprising a gas supply pipe and a mouth, wherein the connection thereof forms a long diffusers with a free jet opening angle, characterised in that the ratio of the diameter of the mouth and the diameter of the gas supply pipe is smaller than three.
2.-10. (canceled)
11. A gas injector as set forth in claim 1 characterised in that a central nozzle pipe with a mouth forming a free jet opening angle is arranged within the gas supply pipe, forming an annular gap for guiding a partial gas flow between the gas supply pipe and the central nozzle pipe, in such a way that the notional prolongation of the generatrix of the central nozzle pipe mouth goes into the generatrix of the long diffuser.
12. A gas injector as set forth in claim 11 characterised in that a closure and regulating device for partial gas flow adjustment is arranged downstream of the central nozzle pipe.
13. A gas injector as set forth in claim 12 characterised in that the closure device comprises two separate valves which are arranged in an overall gas supply pipe and a secondary gas supply pipe which is branched therefrom and which directly charges the central nozzle pipe.
14. A gas injector as set forth in claim 11 characterised in that the closure device is in the form of a cone which is axially displaceable on the outer periphery of the central nozzle pipe and which co-operates with a conical surface of the inside wall of the gas supply pipe.
15. A gas injector as set forth in claim 12 characterised in that the closure device is arranged set back in opposite relationship to the flow direction from the mouth of the central nozzle pipe by more than five times the inside diameter of the central nozzle pipe.
16. A gas injector as set forth in claim 14 characterised in that the closure device is arranged set back in opposite relationship to the flow direction from the mouth of the central nozzle pipe by more than five times the inside diameter of the central nozzle pipe.
17. A gas injector as set forth in claim 1 characterised in that the mouth of the long diffuser is provided with a water-cooled ring at its outside periphery.
18. A gas injector as set forth in claim 17 characterised in that the water-cooled ring is arranged separately.
19. A gas injector as set forth in claim 17 characterised in that the water-cooled ring is rotatable about the axis of the gas injector.
20. A gas injector as set forth in one or more of the preceding claims characterised in that the long diffuser and the ring are arranged together in a burner insert opening enlarging in opposite relationship to the gas flow direction, in such a way that the spacing between the water-cooled ring and the burner insert opening is at a minimum and the axis of the gas injector is rotatable about the center point of the mouth.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102004014896.1 | 2004-03-23 | ||
DE102004014896 | 2004-03-23 | ||
PCT/EP2005/003210 WO2005095857A1 (en) | 2004-03-23 | 2005-03-21 | Gas injector |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080131827A1 true US20080131827A1 (en) | 2008-06-05 |
Family
ID=34962423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/593,946 Abandoned US20080131827A1 (en) | 2004-03-23 | 2005-03-21 | Gas Injector |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080131827A1 (en) |
EP (1) | EP1730442B1 (en) |
JP (1) | JP2007530901A (en) |
WO (1) | WO2005095857A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2143999A1 (en) * | 2008-07-08 | 2010-01-13 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Burner assembly and method of combustion |
CN102537955A (en) * | 2010-12-20 | 2012-07-04 | 西安航天远征流体控制股份有限公司 | Multi-nozzle double-row burner for heating furnace |
US20140041559A1 (en) * | 2011-01-28 | 2014-02-13 | Osaka Gas Co., Ltd. | Furnace-Heating Combustion Apparatus |
CN107076417A (en) * | 2014-08-15 | 2017-08-18 | 日蚀公司 | Double outlet burners and method |
CN110513680A (en) * | 2018-05-21 | 2019-11-29 | 安德森热能科技(苏州)有限责任公司 | A kind of low NOx gas burner and its flame adjusting method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018125872A1 (en) | 2018-10-18 | 2020-04-23 | Flammatec, Spol. S R.O. | Fuel gas injector, system made of ceramic wall element with a ceramic injector insert opening for the use of a fuel gas injector and industrial furnace |
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US5515794A (en) * | 1995-01-23 | 1996-05-14 | Texaco Inc. | Partial oxidation process burner with recessed tip and gas blasting |
US5620316A (en) * | 1994-09-22 | 1997-04-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Working hole for oxyburner, oxyburner assembly comprising such a working hole and process for using such an assembly |
US5681162A (en) * | 1996-09-23 | 1997-10-28 | Nabors, Jr.; James K. | Low pressure atomizer |
US6190158B1 (en) * | 1998-12-30 | 2001-02-20 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Combustion process and its uses for the production of glass and metal |
US6199367B1 (en) * | 1996-04-26 | 2001-03-13 | General Electric Company | Air modulated carburetor with axially moveable fuel injector tip and swirler assembly responsive to fuel pressure |
US6755355B2 (en) * | 2002-04-18 | 2004-06-29 | Eastman Chemical Company | Coal gasification feed injector shield with integral corrosion barrier |
US7175423B1 (en) * | 2000-10-26 | 2007-02-13 | Bloom Engineering Company, Inc. | Air staged low-NOx burner |
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- 2005-03-21 US US10/593,946 patent/US20080131827A1/en not_active Abandoned
- 2005-03-21 EP EP05716389.1A patent/EP1730442B1/en not_active Not-in-force
- 2005-03-21 WO PCT/EP2005/003210 patent/WO2005095857A1/en active Application Filing
- 2005-03-21 JP JP2007504373A patent/JP2007530901A/en active Pending
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2143999A1 (en) * | 2008-07-08 | 2010-01-13 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Burner assembly and method of combustion |
WO2010003866A1 (en) * | 2008-07-08 | 2010-01-14 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Burner assembly and method of combustion |
US9568194B2 (en) | 2008-07-08 | 2017-02-14 | L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude | Burner assembly and method of combustion |
CN102537955A (en) * | 2010-12-20 | 2012-07-04 | 西安航天远征流体控制股份有限公司 | Multi-nozzle double-row burner for heating furnace |
US20140041559A1 (en) * | 2011-01-28 | 2014-02-13 | Osaka Gas Co., Ltd. | Furnace-Heating Combustion Apparatus |
US9677760B2 (en) * | 2011-01-28 | 2017-06-13 | Osaka Gas Co., Ltd. | Furnace heating combustion apparatus |
CN107076417A (en) * | 2014-08-15 | 2017-08-18 | 日蚀公司 | Double outlet burners and method |
EP3180567A4 (en) * | 2014-08-15 | 2018-07-04 | Eclipse Inc. | Dual outlet burner and method |
CN110513680A (en) * | 2018-05-21 | 2019-11-29 | 安德森热能科技(苏州)有限责任公司 | A kind of low NOx gas burner and its flame adjusting method |
Also Published As
Publication number | Publication date |
---|---|
EP1730442B1 (en) | 2014-08-20 |
WO2005095857A1 (en) | 2005-10-13 |
JP2007530901A (en) | 2007-11-01 |
EP1730442A1 (en) | 2006-12-13 |
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