CN104595900B - Low-nitrogen-oxide gas combustor and combustion method of combustor - Google Patents

Low-nitrogen-oxide gas combustor and combustion method of combustor Download PDF

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Publication number
CN104595900B
CN104595900B CN201510026013.0A CN201510026013A CN104595900B CN 104595900 B CN104595900 B CN 104595900B CN 201510026013 A CN201510026013 A CN 201510026013A CN 104595900 B CN104595900 B CN 104595900B
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combustion
gas
layer
burner
stage
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CN104595900A (en
Inventor
刘上光
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SHANGHAI HANZHUO ENERGY TECHNOLOGY Co Ltd
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SHANGHAI HANZHUO ENERGY TECHNOLOGY Co Ltd
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    • 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
    • F23D14/24Non-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 at least one of the fluids being submitted to a swirling motion
    • 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
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • F23D14/58Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration

Abstract

The invention discloses a low-nitrogen-oxide gas combustor and a combustion method of the combustor. The combustor comprises a primary combustor and a secondary combustor, wherein the primary combustor is arranged at the center; the secondary gas combustor is arranged at the periphery of the primary combustor; the primary combustor comprises a central gas jetting pipe annularly and symmetrically arranged and a primary whirlcone arranged in front of the central gas jetting pipe; the secondary combustor comprises an outer gas pipe, an outer gas jetting opening, a Venturi channel and a secondary whirlcone; each of the outer gas jetting opening and the outer gas pipe is annularly and symmetrically arranged; the outer gas jetting opening is communicated with the outer gas pipe through an outer gas cavity; the Venturi channel is arranged between the outer gas jetting opening and the central gas jetting pipe; the secondary whirlcone is arranged at the outlet of the Venturi channel. The low-nitrogen-oxide gas combustor has the advantages that the combustion area flame temperature is uniform, no obvious high-temperature area is generated, and the emission of nitrogen oxide is inhibited.

Description

Low nitrogen oxide gas burner and its combustion method
Technical field
The invention belongs to technical field of burner, more particularly to a kind of low nitrogen oxide gas burner and its burning side Method.
Background technology
With the raising and the popularization of natural gas motorcar of environmental requirement, low stain fuel gas buring technology increasingly obtains enterprise Attention.The features such as fuel gas buring has safe and efficient, easy to operate, ought to be widely applied.
There is the shortcomings of extensive, design is unreasonable in the application of China's gas burner at present, cause its pollutant emission big It is unsatisfactory for existing environmental protection standard more.
The NOx that gas burner is produced when running is mainly NO, therefore, the constructive ways master of NOx in research of combustion If the constructive ways of research NO.The NO of combustion process generates pattern mainly three kinds:The first is heating power type (Thermal NO), it is Quick-type (Prompt NO) that second is, the third is fuel type (Fuel NO).Because actual combustion gas is special in engineering Property limited, the more difficult control of generation of fuel type NO and Quick-type NO, typically by controlling the generation of thermal NO reaching suppression The purpose of NOx emission.
In existing some low-NO_x combustion technologies, mainly based on burn classification technique, dense-dilute burner combustion technology etc., but Combustion gas and the distribution of air, and accordingly the channel design form of distribution governor motion and air does not carry out grinding for system Study carefully, cause gas burner to there are problems that temperature field is uneven in actual use, burn, pollutant also cannot be obtained To control well.
The content of the invention
The technical problem to be solved is to provide a kind of low low nitrogen oxide gas burning of discharged nitrous oxides Device, to overcome the shortcomings of that prior art is present.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that:
A kind of low nitrogen oxide burner, it is characterised in that:Including single-stage combustion device and two stage burner;The one-level combustion Burner is located at center, and the second gas burning burner is located at the periphery of the single-stage combustion device;The single-stage combustion device is by ring The center exhaust gas nozzle being arranged symmetrically and the one-level cyclone in front of the exhaust gas nozzle of center are constituted;The two stage burner by Outer layer Gas Pipe, outer layer combustion gas spout, venturi passage and second cyclone are constituted, and the outer layer combustion gas spout and outer layer fire The equal ring of tracheae is arranged symmetrically, and the outer layer combustion gas spout is connected by outer layer combustion gas cavity with outer layer Gas Pipe, the literary mound In passage be located between outer layer combustion gas spout and center exhaust gas nozzle, the second cyclone goes out located at the venturi passage At mouthful.
Gas header pipe is also included, the outer layer Gas Pipe connects the gas header pipe with the center exhaust gas nozzle.
The gas header pipe and center exhaust gas nozzle are located in a cylindrical central sleeve, and the center sleeve is internally formed centre wind Passage, forms internal layer wind passage between the cylindrical central sleeve and the outer layer Gas Pipe, outer layer combustion gas cavity, the venturi leads to Road is located at the exit of the internal layer wind passage.
Outer layer wind passage is formed between the outer layer combustion gas cavity and furnace wall.
The rear portion of the outer layer combustion gas cavity is provided with the air intake dividing plate for being connected on center sleeve and being vertically arranged, it is described enter Damper is provided between wind dividing plate and the outer layer combustion gas cavity.
There is the air intake gap for being communicated to center wind duct between the air intake dividing plate and installing port.
In addition, the present invention also provides the combustion method of said burner, the combustion method is:
By controlling combustion gas and air stoichiometry, being generated by single-stage combustion device carries out the single-stage combustion region of combustion with meagre oxygen, by Two stage burner generates the secondary firing region positioned at the single-stage combustion areas outside for carrying out oxygen-excess combustion.
The matching method of wherein combustion gas and air is:The air capacity that single-stage combustion device sprays at center is less than fuel gas buring institute Theoretical air requirement is needed, so as to combustion with meagre oxygen reaction occur, single-stage combustion region is formed;Meanwhile, outside two stage burner sprays empty Tolerance is higher than theoretical air requirement needed for fuel gas buring, so as to oxygen-excess combustion reaction occur, forms secondary firing region.Such combustion Burning mode ensure that combustion zone mean temperature is relatively low and uniform temperature fields.
In addition, air produces High-speed DC wind by the acceleration of the venturi passage, by single-stage combustion region The flue gas volume that combustion flame is produced sucks back single-stage combustion region, reduces this zonal combustion mean temperature.Also, it is logical by outer layer wind A small amount of direct current wind is arranged in road in the outermost of combustion flame, blow-through to flame afterbody and part unburned completely high-temperature fuel gas Combustion reaction is carried out again, it is ensured that burning is complete.
Using above-mentioned technical proposal, the present invention has combustion zone homogeneous flame temperature, produces without obvious high-temperature area, enters And inhibit the advantage of discharged nitrous oxides.
Description of the drawings
With reference to the accompanying drawings and detailed description the present invention is described in detail:
Fig. 1 is the structural representation of the present invention.
Specific embodiment
As shown in figure 1, the low nitrogen oxide burner of the present invention, is tubular structure, it includes shell 201, center Cylinder 202, outer layer combustion gas cavity 203, damper 4, gas header pipe 6, burning torch 7, installing port 8, the combustion of outer layer Gas Pipe 5, center Gas blowout pipe 9, one-level cyclone 10, second cyclone 11.
Wherein, installing port 8 is made up of vertical oral area baffle plate 81 with the ring-type coaming plate 82 for being connected to the edge of oral area baffle plate 81.
Gas header pipe 6 is located at the center of burner, through the oral area baffle plate 81 of installing port 8, extends to burner hearth;Outer layer combustion gas Pipe 5 and center exhaust gas nozzle 9 are several, and ring is arranged symmetrically in the surrounding of gas header pipe 6, and connects with gas header pipe 6, Wherein, center exhaust gas nozzle 9 is arranged in center, and outer layer Gas Pipe 5 is arranged in periphery.
Center sleeve 202 is enclosed between center exhaust gas nozzle 9 and outer layer Gas Pipe 5.The one end of outer layer combustion gas cavity 203 with it is outer The ejiction opening connection of layer Gas Pipe 5, the end face top of the other end is distributed with the outer layer combustion gas spout 12 that ring is arranged symmetrically.
Vertical air intake dividing plate 21 is provided with the rear portion of outer layer combustion gas cavity 203, the air intake dividing plate 21 is welded on center On pipe 202, damper 4 is arranged between the air intake dividing plate 21 and outer layer combustion gas cavity 203.In outer layer combustion gas cavity 203 Venturi passage 2 is also formed between inside panel 213 and center sleeve 202.The position of outlet 22 of venturi passage 2 is than center combustion gas The nozzle exit area of jet pipe 9 is slightly advanced.
The termination of gas header pipe 6 is also distributed circumferentially disposed combustion gas spout.One-level cyclone 10 is arranged on gas header pipe 6 Termination simultaneously can carry out axial location slidable adjustment on the termination of gas header pipe 6, for rotational flow air and direct current air by conjunction Suitable pro rate.The combustion gas spout of center exhaust gas nozzle 9 is located exactly at the rear of one-level cyclone 10, and is closely located to.
Second cyclone 11 is arranged on the termination of center sleeve 202, i.e. the position of outlet 22 of venturi passage 2, and this two Level cyclone 11 can carry out axial location slidable adjustment on the termination of center sleeve 202, for rotational flow air and direct current air By proper ratio distribute.
Burning torch 7 is fixed on by gas header pipe 6, the combustion gas spout of the close center exhaust gas nozzle 9 of its igniter head.
In addition, having air intake gap 23, Jing air intakes gap between the ring coaming plate 82 and air intake dividing plate 21 of installing port 8 23rd, between oral area baffle plate 81 and air intake dividing plate 21 passage, cylindrical central sleeve 202 are internally formed center wind duct 101.Outer layer fires Outer layer wind passage 1 is formed between the exterior panel 223 of gas cavity 203 and furnace wall 100.Adjusted air door 4 and venturi passage 2 are formed Internal layer wind passage 102.
In the low nitrogen oxide burner, one-level cyclone 10, center exhaust gas nozzle 9 define single-stage combustion device.In Heart exhaust gas nozzle 9 supplies combustion gas dispersion, it is to avoid combustion gas mixing is insufficient in mixed airflow;Venturi passage 2, second cyclone 11st, outer layer combustion gas spout 12 defines two stage burner, is arranged in the periphery of single-stage combustion device.Into in inner-layer channel 102 Wind accelerates to flow out by venturi passage 2, partly sprays through second cyclone eddy flow, and Partial DC sprays.Combustion gas spout leads to Cross possible angle dispersion to spray.
Burning torch 7 produces stable flame using a small amount of combustion gas and air, for the main burner effect of igniting.
The system composition of the low nitrogen oxide gas burner of the present invention, it is different from other low nitrogen oxide burners, this The method that invention adopts fuel staging and air classification, by combustion gas and air stoichiometry, in single-stage combustion device combustion zone, it is ensured that Generation combustion with meagre oxygen, and in two stage burner combustion zone, there is oxygen-excess combustion, while on the outside of two stage burner, air leads to The acceleration for crossing Venturi tube produces High-speed DC wind, and the flue gas volume that can be produced combustion flame sucks back combustion zone, reduces The average flame temperature of combustion zone.In the outermost of combustion flame, a small amount of direct current wind is arranged, blow-through is to flame afterbody and part Completely high-temperature fuel gas carry out again combustion reaction to unburned.This design ensures that combustion flame is full of burner hearth, and combustion zone Homogeneous flame temperature, produces without obvious high-temperature area, and then inhibits discharged nitrous oxides.
Therefore, the present invention has combustion zone homogeneous flame temperature, produces without obvious high-temperature area, and then inhibits nitrogen oxygen The advantage of compound discharge.
The above, is only presently preferred embodiments of the present invention, and any pro forma restriction, Ren Hesuo are not made to the present invention Has usually intellectual in category technical field, if in without departing from scope of the claims proposed by the invention, utilizing The Equivalent embodiments that local done by disclosed technology contents is changed or modified, and without departing from the skill of the present invention Art feature, still belongs in the range of the technology of the present invention feature.

Claims (7)

1. a kind of low nitrogen oxide burner, including single-stage combustion device and two stage burner;The single-stage combustion device is located at center, The second gas burning burner is located at the periphery of the single-stage combustion device;The single-stage combustion Qi You centers exhaust gas nozzle and one-level Cyclone is constituted, and the center exhaust gas nozzle ring is arranged symmetrically, and the two stage burner is by outer layer Gas Pipe, outer layer gas injection Mouth is constituted, and the outer layer combustion gas spout and the equal ring of outer layer Gas Pipe are arranged symmetrically, it is characterised in that:The one-level cyclone sets In center exhaust gas nozzle front, the outer layer combustion gas spout is connected by outer layer combustion gas cavity with outer layer Gas Pipe, described two grades Burner is also included located at the venturi passage between the outer layer combustion gas spout and center exhaust gas nozzle and located at the text The second cyclone in the exit of passage in mound;The center exhaust gas nozzle is located in a cylindrical central sleeve, in the center sleeve Portion forms center wind duct, and internal layer wind passage is formed between the cylindrical central sleeve and the outer layer Gas Pipe, outer layer combustion gas cavity, The venturi passage is located at the exit of the internal layer wind passage.
2. low nitrogen oxide burner according to claim 1, it is characterised in that:Gas header pipe is also included, it is described outer Layer Gas Pipe connects the gas header pipe with the center exhaust gas nozzle.
3. low nitrogen oxide burner according to claim 1, it is characterised in that:The outer layer combustion gas cavity and furnace wall it Between formed outer layer wind passage.
4. low nitrogen oxide burner according to claim 3, it is characterised in that:The rear portion of the outer layer combustion gas cavity sets There is the air intake dividing plate for being connected on center sleeve and being vertically arranged, be provided between the air intake dividing plate and the outer layer combustion gas cavity Damper.
5. low nitrogen oxide burner according to claim 4, it is characterised in that:Between the air intake dividing plate and installing port With the air intake gap for being communicated to center wind duct.
6. according to claim 1-5 any claim low nitrogen oxide burner combustion method, it is characterised in that:It is logical Control combustion gas and air stoichiometry are crossed, being generated by single-stage combustion device carries out the single-stage combustion region of combustion with meagre oxygen, by two stage burner Generation carries out the secondary firing region positioned at the single-stage combustion areas outside of oxygen-excess combustion.
7. the combustion method of low nitrogen oxide burner according to claim 6, it is characterised in that:Air passes through the literary mound In the acceleration of passage produce High-speed DC wind, the flue gas volume that the combustion flame in single-stage combustion region is produced sucks back one-level combustion Burn region.
CN201510026013.0A 2015-01-19 2015-01-19 Low-nitrogen-oxide gas combustor and combustion method of combustor Active CN104595900B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106568083B (en) * 2016-11-07 2018-11-30 北京航天石化技术装备工程有限公司 A kind of pyrolysis furnace side wall low nitrogen oxide gas burner
JP6551375B2 (en) * 2016-12-07 2019-07-31 トヨタ自動車株式会社 Hydrogen gas burner structure and hydrogen gas burner apparatus equipped with the same
CN109654539B (en) * 2018-12-07 2020-09-18 中国航发沈阳发动机研究所 Dry low-emission gas turbine engine combustion chamber
WO2021027094A1 (en) * 2019-08-14 2021-02-18 江苏中圣园科技股份有限公司 Combustion apparatus for upper combustion chamber of sleeve kiln

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN201069161Y (en) * 2007-07-19 2008-06-04 中国石油化工股份有限公司 Long flame low nitrous oxides discharge gas burner
CN202048572U (en) * 2011-01-19 2011-11-23 兰州泰得燃烧设备工程有限公司 Industrial gas burner
CN102721058A (en) * 2012-06-26 2012-10-10 上海华之邦能源科技有限公司 Gas burner with low NOX
CN204704817U (en) * 2015-01-19 2015-10-14 上海汉卓能源科技有限公司 A kind of low nitrogen oxide gas burner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230912B1 (en) * 2010-10-29 2013-02-06 주식회사 수국 Low nitrogen oxide burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201069161Y (en) * 2007-07-19 2008-06-04 中国石油化工股份有限公司 Long flame low nitrous oxides discharge gas burner
CN202048572U (en) * 2011-01-19 2011-11-23 兰州泰得燃烧设备工程有限公司 Industrial gas burner
CN102721058A (en) * 2012-06-26 2012-10-10 上海华之邦能源科技有限公司 Gas burner with low NOX
CN204704817U (en) * 2015-01-19 2015-10-14 上海汉卓能源科技有限公司 A kind of low nitrogen oxide gas burner

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