CN101460781A - Gas burner nozzle - Google Patents

Gas burner nozzle Download PDF

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Publication number
CN101460781A
CN101460781A CNA2007800205086A CN200780020508A CN101460781A CN 101460781 A CN101460781 A CN 101460781A CN A2007800205086 A CNA2007800205086 A CN A2007800205086A CN 200780020508 A CN200780020508 A CN 200780020508A CN 101460781 A CN101460781 A CN 101460781A
Authority
CN
China
Prior art keywords
gas burner
pipe
oxygen
group
pipes
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.)
Pending
Application number
CNA2007800205086A
Other languages
Chinese (zh)
Inventor
E·埃弗兹
R·埃弗兹
S·埃弗兹
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.)
Egon Evertz KG GmbH and Co
Original Assignee
Egon Evertz KG GmbH and Co
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 Egon Evertz KG GmbH and Co filed Critical Egon Evertz KG GmbH and Co
Publication of CN101460781A publication Critical patent/CN101460781A/en
Pending legal-status Critical Current

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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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/56—Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14642—Special features of gas burners with jet mixers with more than one gas injection nozzles or orifices for a single mixing tube
    • 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

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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)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Air Supply (AREA)

Abstract

The invention relates to a gas burner nozzle for flame work, with a central oxygen supply consisting of several pipes (13) and with several pipes (11, 12) arranged around the aforementioned oxygen supply for the supply of fuel gas. According to the invention, the pipes for the oxygen supply are arranged in groups, with the individual groups arranged coaxially and at a distance from each other, and with each group consisting of at least two rows of pipes arranged in the form of concentric rings.

Description

Gas burner
Technical field
The present invention relates to a kind of gas burner that is used for the flame operation, comprise oxygen input part and a plurality of pipe that is used to import combustion gas of central authorities that constitute by a plurality of pipes around the setting of described oxygen input part.
Background technology
In the flame utensil, adopt gas burner, described flame utensil or constitute automatics or constitute manual flame utensil.The flame operation is essential for the combustion cleaning on the bad surface of plate for example.In plate bad time of making by casting in cooling like this, often produce the crackle of not expecting in its surface, and they are removed by surface treatment.Corresponding description also is applicable at bad burr or the overlap that for example produces by cutting of processing plate.The flame burner that adopts guides along relevant surface in order to get rid of blemish.
Have following danger in the gas burner of above-mentioned form, flame is kept off back when burner operation.For fear of this point, to have advised in the back of outlet a punctulate element being set out and away in burner body inside, it should constitute safety curtain (seeing CH-A-472 632 or FR-A-1448 292).
Suggestion in EP 0 043 822 in addition, burning during operation by means of can regulate power and orientation, by the oxygen jet that thermal-flame surrounds, in the burning operation process, irrespectively change the shape of cross section and the area of jet with jet power.Therefore the burner that constitutes has an oxygen jet, and it is divided into a plurality of that be adjacent to each other and be combined into the nozzle of compact spray nozzle.Spray nozzle is surrounded by other nozzle of the burner that is configured for respectively heating, and these nozzles and burner are provided with some devices, is used for dividually feed-in gas or oxygen or adds hot mixt.But each feedthrough separate regulation.As seen by embodiment, adopt 65 equally spaced oxygen input tubes that are provided with one heart, they are again by 12 larger-diameter pipe encirclements that are used to import heated air.Control device by regulation should produce circle, rectangle or oval-shaped effective burner cross section.
More known in addition gas burners, they have a plurality of pipes that are used to import oxygen that are provided with concentrically with respect to one another, and these pipes are by a plurality of pipe encirclements that are used to import combustion gas around setting.
In the gas burner of above-mentioned form, according to prior art, cross section typically has a diameter from 200 to 250mm for circular burner.Its defective is that the bad narrow limit of plate must repeatedly move past with such burner.The simple expansion of burner diameter, it is absolute not enough for example expanding 300mm to, because owing to the higher heat in center at burner jet or burner jet awl, temperature is the highest and therefore than melting workpiece more strongly in edge, this causes cross section when the burner longitudinal guide be the surface of spill.Another technical problem is high relatively oxygen expenditure.
Summary of the invention
Therefore the objective of the invention is to, realize a kind of gas burner, it need to allow the surface quality of optimization of the workpiece of processing under the situation of as far as possible little oxygen expenditure and less process time.
Above-mentioned purpose reaches by the gas burner of claim 1.
By the present invention, the pipe that is used to import oxygen be not be arranged to equidistant or be arranged on the center equally away from ring, but be provided with in groups, each group constitutes with the liftoff setting of spacer and every group of pipes row that are provided with by at least two annulars concentrically with respect to one another.Three groups of pipes especially are set are used to import oxygen.In other words, three ring districts are set preferably, their each intervals distance and pipe separately is set respectively within them, the spacing of pipe is less than the spacing in ring district.Each group can have 2 or 3 pipe ring row that are used to import oxygen.On described Guan Zaiyi the outer shroud that is used to import oxygen, one group of nozzle opening that has respectively than minor diameter is set, imports combustion gas by them.
If with such diameter is that 280 to 400mm burner moves past bad longitudinal edge of plate, they can be processed in a unique work step so, and obtain the bad surface of plate on plane basically.By to longitudinal edge save move past conserve oxygen significantly once more.In addition, unexpectedly obtain the oxygen saving amount of time per unit about 25%, this only is only possible by novel nozzle structure.
Preferred each pipe that is used to import oxygen has 6 to 12mm, the outlet internal diameter of 8mm especially.As known by prior art in principle, gas burner has a plurality of oxygen input tubes separately, and they can be controlled dividually.At this, each gas input part that separates promptly is connected in a ring district with one group of input pipe.
By another form of implementation of the present invention, a plurality of pipes that separate of a group, preferred 2 to 3 pipes are combined into a grouping, and they constitute a single piece body respectively, and it is arranged in the gas burner replaceably.Can upgrade the surf zone of the damage on the end face by changing relevant grouping partly in this way.
By further scheme of the present invention, described pipe group is arranged in the unique end block, preceding piece and then on this end block, this preceding piece have three cups that are used to import oxygen that are provided with concentrically with respect to one another, and each cup is connected with the pipe of a group (ring group) respectively.Can obviously reduce gas burner weight by this measure.Owing to the life-span reason, gas inlet pipe is made of copper.
The length of each pipe is by being to avoid the turbulent needed highway section on the pipe end of far-end to determine, described turbulent flow may cause volatile burning and corresponding burner to damage.Particularly constitute Laval nozzle and during towards the assembly of the directed cylindrical tube of outlet, obtain the structure (preferred 8mm is wide in the exit) of the optimization of each pipe when each pipe that is used to import oxygen.Have two conical zones by the known Laval nozzle of prior art in principle, streamwise sees that first circular cone formation is that attenuate and circular cone formation subsequently expansion.End at extended area is provided with a cylindrical tube, and its diameter keeps identical until the pipe outlet.
Known by rheology, when being applied in the laminar flow in pipe of constant pressure, flow resistance and diameter reduce to improve reciprocally.Because this tubular construction, Yin Dao air-flow is by exciting, because the interaction of air-flow produces the pulse train of high frequency therein.Accessible pulse frequency and amplitude depend on input pressure, the shrinkage degree and the degree of expansion of pipe diameter and the length with the 3rd zone of constant diameter particularly.The pulse of leaving the impact type of nozzle exit end causes when the flame operation, and liquid that produces owing to the fusing of the surface of the work of need handling and the solid particle that may comprise blow away from the surface.This not only causes for example raising of the surface quality on the bad surface of plate of the workpiece handled, and causes the further reduction of oxygen expenditure.Within the scope of the invention, the zone of and then dispersing under the situation of the segmentation that a diameter remains unchanged can connected on first constriction zone of interior cross section directly or in the centre.If the segmentation that has diameter to remain unchanged keeps flowing velocity so in this zone, stack can not appear, and described being superimposed upon in zone of dispersing and the prolongation pipe of following expected.The segmented general of the weak point that preferred diameter remains unchanged is the respective length less than the zone of converging He disperse.
Description of drawings
By means of accompanying drawing other explanatory content of the present invention and advantage are described.Wherein:
Fig. 1 shows the vertical view of gas burner;
Fig. 2 shows the partial cross sectional view of gas burner;
Fig. 3 a to 3d shows the cross-sectional view of pipe that is used to import oxygen with different air flow structures respectively.
The specific embodiment
The gas burner of describing in Fig. 1 that is used for the flame operation has the oxygen input area of central authorities, and it comprises a plurality of pipes that are provided with in groups.At this, the ring district 11 of outside is made of the pipe that separates, and pipe 111 wherein is set on the ring outside, pipe 113 is set being provided with on the back to back ring on pipe 112 and inside the ring.Pipe 112 is arranged on " space " with pipe 111,113 with staggering each other respectively.The pipe diameter is 8mm, pipe 111,112 and 113 and the tube pitch of adjacent tubes be respectively about 4mm.
Two row pipe separately is set on different-diameter in the ring district 12 of centre, and they stagger equally each other, and feasible spacing with next pipe is 4mm.
4 pipes are set on innermost ring in the ring district of central authorities, and on back to back each ring, 12 pipes are set respectively.Obtain 148 pipes that are used to import oxygen altogether at this.Have the pipe that is used to import combustion gas around ground in two row 14 and 15 that are provided with one heart, they have obviously less diameter.Whole burner head 10 is made of copper, and wherein gas burner can constitute solid, the hole of processing respective numbers in solid.
Fig. 2 shows a kind of deformation program, wherein only outside region in front constitutes solid, preceding piece and then on this zone, the gas input part 17 of each pipe that leads to ring group 12 that the oxygen input part 16, that the central authorities of each pipe that leads to ring group 13 are set in this preceding piece and this oxygen input part are concentric and the concentric gas input part 18 that leads to pipe group 11 of an outside.In three gas input parts 16,17,18 each can be regulated separately, makes that the gas velocity in each pipe can correspondingly be controlled.
Preferred each pipe 111,112,113 constitutes like this, makes that in length be L cLaval nozzle 100 on and then a length be L kCylindrical tube 101.It is L that Laval nozzle has a length 2First converge the zone 121 and length be L 3The zone of dispersing 122.The subregion that between them length can be set be L4, it has constant minimum diameter d MinThe diameter of cylindrical tube 101 is labeled as d kAnd yardstick with maximum gauge of conical extension 122.Length L kOr L 5Can change, for example between length dimension 72mm, 65mm and 25mm.Length L 2For example may be selected to 10mm, length L 4For example may be selected to 2mm, and length L 3For example may be selected to 25mm.Gas in the inflow pipe for example has 1.3 * 10 6The pressure P of Pa 0And temperature T 0(for example room temperature).By changing pressure P 0The spray cone of the Oxygen Flow of discharging can be changed over that converge, that disperse or substantially parallel shape with the relation of external pressure (environmental pressure).In addition by input pressure P 0Change the vibration frequency and the vibration amplitude that differently produce.

Claims (13)

1. the gas burner that is used for the flame operation, the oxygen input part and a plurality of pipe that is used to import combustion gas that comprise central authorities that constitute by a plurality of pipes around the setting of described oxygen input part, it is characterized in that: be used to import that the pipe of oxygen is corresponding is provided with in groups, each group (11,12,13) is made of the pipes row that at least two annulars are provided with the liftoff setting of spacer and every group (11,12,12) concentrically with respect to one another.
2. gas burner according to claim 1 is characterized in that: be provided with three pipe groups (11,12,13) that are used to import oxygen.
3. gas burner according to claim 1 and 2 is characterized in that: each pipe that is used to import oxygen has 6 to 12mm, the outlet internal diameter of 8mm especially.
4. according to the described gas burner of one of claim 1 to 3, it is characterized in that: every group of input pipe has independent gas input control device.
5. according to the described gas burner of one of claim 1 to 4, it is characterized in that: a plurality of pipes that separate of a group, preferred 2 to 3 pipes are combined into a grouping, described grouping constitutes a single piece body respectively, and this single piece body preferably can be arranged in the gas burner with changing.
6. according to the described gas burner of one of claim 1 to 5, it is characterized in that: described pipe group is arranged in the end block, preceding piece and then on this end block, should have three cups that are used to import oxygen (16,17,18) that are provided with concentrically with respect to one another by preceding piece, each cup is connected with the pipe of a group (11,12,13) respectively.
7. according to the described gas burner of one of claim 1 to 6, it is characterized in that: gas inlet pipe is made of copper.
8. according to the described gas burner of one of claim 1 to 7, it is characterized in that: external diameter is 250 to 400mm, preferred 300mm.
9. according to the described gas burner of one of claim 1 to 8, it is characterized in that: each pipe that is used to import oxygen constitutes the assembly of Laval nozzle (100) and cylindrical tube (101).
10. gas burner according to claim 9 is characterized in that: the length (L of first area (121) 2) less than the length (L of second area (122) and/or the 3rd zone (123) 3).
11. according to the described gas burner of one of claim 1 to 10, it is characterized in that: described trizonal diameter and length are coordinated with each other, make gas flow out on nozzle exit end pulsed ground.
12. gas burner according to claim 11 is characterized in that: the pulse frequency on nozzle exit end is 100 to 650Hz, and preferred 150 to 250Hz.
13. according to the described gas burner of one of claim 1 to 12, it is characterized in that: the maximum gas flow rate in each pipe is 2 Mach, promptly equals double velocity of sound.
CNA2007800205086A 2006-06-02 2007-05-18 Gas burner nozzle Pending CN101460781A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006008760.5 2006-06-02
DE202006008760U DE202006008760U1 (en) 2006-06-02 2006-06-02 gas burner nozzle

Publications (1)

Publication Number Publication Date
CN101460781A true CN101460781A (en) 2009-06-17

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ID=38529390

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007800205086A Pending CN101460781A (en) 2006-06-02 2007-05-18 Gas burner nozzle

Country Status (11)

Country Link
US (1) US20090186310A1 (en)
EP (1) EP2024681A1 (en)
JP (1) JP2009539055A (en)
KR (1) KR20090023593A (en)
CN (1) CN101460781A (en)
AU (1) AU2007256799A1 (en)
BR (1) BRPI0711720A2 (en)
DE (1) DE202006008760U1 (en)
EA (1) EA200802264A1 (en)
MX (1) MX2008015030A (en)
WO (1) WO2007140740A1 (en)

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Publication number Priority date Publication date Assignee Title
JP2010230257A (en) * 2009-03-27 2010-10-14 Dainichi Co Ltd Combustion apparatus
WO2011154043A1 (en) * 2010-06-11 2011-12-15 Gesellschaft Für Autogenmaschinen Und -Geräte Mbh Flame scarfing head for the scarfing of slabs
DE102015105144A1 (en) 2015-04-02 2016-10-06 Gefam Gmbh Flämmkopf
AU2016304144B2 (en) * 2015-07-31 2022-03-17 Nuvera Fuel Cells, LLC Burner assembly with low NOx
CN110397921B (en) * 2019-07-23 2024-09-20 华帝股份有限公司 Outer fire cover, manufacturing method of outer fire cover and burner applying outer fire cover

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JPS5714106A (en) * 1980-06-27 1982-01-25 Kawasaki Steel Corp Method and apparatus for combustion with low nox in radiant tube burner
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Also Published As

Publication number Publication date
DE202006008760U1 (en) 2007-10-04
BRPI0711720A2 (en) 2011-11-29
US20090186310A1 (en) 2009-07-23
EP2024681A1 (en) 2009-02-18
MX2008015030A (en) 2009-02-10
WO2007140740A1 (en) 2007-12-13
EA200802264A1 (en) 2009-06-30
KR20090023593A (en) 2009-03-05
AU2007256799A1 (en) 2007-12-13
JP2009539055A (en) 2009-11-12

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Open date: 20090617