CN104595900A - 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
CN104595900A
CN104595900A CN201510026013.0A CN201510026013A CN104595900A CN 104595900 A CN104595900 A CN 104595900A CN 201510026013 A CN201510026013 A CN 201510026013A CN 104595900 A CN104595900 A CN 104595900A
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CN
China
Prior art keywords
combustion
gas
stage
burner
center
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Application number
CN201510026013.0A
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Chinese (zh)
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CN104595900B (en
Inventor
刘上光
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上海汉卓能源科技有限公司
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Priority to CN201510026013.0A priority Critical patent/CN104595900B/en
Publication of CN104595900A publication Critical patent/CN104595900A/en
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Publication of CN104595900B publication Critical patent/CN104595900B/en

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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 combustion method thereof
Technical field
The invention belongs to technical field of burner, particularly relate to a kind of low nitrogen oxide gas burner and combustion method thereof.
Background technology
Along with the raising of environmental requirement and the universal of natural gas motorcar, low stain fuel gas buring technology more and more obtains the attention of enterprise.Fuel gas buring has the features such as safe and efficient, easy and simple to handle, ought to be widely applied.
The application of current China gas burner exist extensive, design the shortcomings such as unreasonable, cause its pollutant emission scarcely to meet existing environmental protection standard.
The NOx produced when gas burner runs is mainly NO, and therefore, in research of combustion, the constructive ways of NOx mainly studies the constructive ways of NO.The NO of combustion process generates pattern and mainly contains three kinds: the first is for being heating power type (Thermal NO), and the second is for being Quick-type (Prompt NO), and the third is fuel type (Fuel NO).Because actual combustion gas characteristic limit in engineering, the more difficult control of generation of fuel type NO and Quick-type NO, the generation generally by controlling thermal NO reaches the object suppressing NOx emission.
At more existing low-NO_x combustion technology, main based on burn classification technique, dense-dilute burner combustion technology etc., but the distribution of combustion gas and air, and corresponding channel design form of distributing governor motion and air does not all carry out systematic research, temperature field is uneven, the problem such as insufficient of burning to cause gas burner to exist in actual use, and pollutant also cannot be well controlled.
Summary of the invention
Technical problem to be solved by this invention is to provide the low low nitrogen oxide gas burner of a kind of discharged nitrous oxides, to overcome the deficiency that prior art exists.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of low nitrogen oxide burner, is characterized in that: comprise single-stage combustion device and two stage burner; Center is located at by described single-stage combustion device, and the periphery of described single-stage combustion device is located at by described second gas burning burner; The center exhaust gas nozzle that described single-stage combustion device is arranged symmetrically with by hoop is formed with the one-level cyclone being located at exhaust gas nozzle front, center; Described two stage burner is made up of outer Gas Pipe, outer combustion gas spout, venturi passage and second cyclone, described outer combustion gas spout and the equal hoop of outer Gas Pipe are arranged symmetrically with, described outer combustion gas spout is communicated with outer Gas Pipe by outer combustion gas cavity, described venturi passage is located between outer combustion gas spout and center exhaust gas nozzle, and described second cyclone is located at the exit of described venturi passage.
Also include gas header pipe, described outer Gas Pipe is all communicated with described gas header pipe with described center exhaust gas nozzle.
Described gas header pipe and center exhaust gas nozzle are positioned at a cylindrical central sleeve, described center sleeve inside forms center wind duct, form internal layer wind passage between described cylindrical central sleeve and described outer Gas Pipe, outer combustion gas cavity, described venturi passage is positioned at the exit of described internal layer wind passage.
Outer wind passage is formed between described outer combustion gas cavity and furnace wall.
The rear portion of described outer combustion gas cavity is provided with and is connected on center sleeve and the vertical air intake dividing plate arranged, is provided with damper between described air intake dividing plate and described outer combustion gas cavity.
There is between described air intake dividing plate and installing port the air intake gap being communicated to center wind duct.
In addition, the present invention also provides the combustion method of said burner, and this combustion method is:
By controlling combustion gas and air stoichiometry, being generated the single-stage combustion region of carrying out combustion with meagre oxygen by single-stage combustion device, being generated the secondary firing region being positioned at described single-stage combustion areas outside of carrying out oxygen-excess combustion by two stage burner.
Wherein combustion gas and air matching method for: in the air capacity of center single-stage combustion device ejection lower than theoretical air requirement needed for fuel gas buring, thus there is combustion with meagre oxygen reaction, form single-stage combustion region; Meanwhile, higher than theoretical air requirement needed for fuel gas buring, thus there is oxygen-excess combustion reaction in outside two stage burner ejection air capacity, forms secondary firing region.Such combustion system can ensure the lower and uniform temperature fields of combustion zone mean temperature.
In addition, air produces High-speed DC wind by the acceleration of described venturi passage, the flue gas that the combustion flame in single-stage combustion region produces is entrainmented go back to single-stage combustion region, reduces this zonal combustion mean temperature.Further, by the outermost of outer wind passage at combustion flame, arrange a small amount of direct current wind, directly blow to flame afterbody and part unburned completely high-temperature fuel gas again carry out combustion reaction, ensure that burning is completely.
Adopt technique scheme, the present invention has combustion zone homogeneous flame temperature, produces without obvious high-temperature area, and then inhibits the advantage of discharged nitrous oxides.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, low nitrogen oxide burner of the present invention, for tubular structure, it includes shell 201, cylindrical central sleeve 202, outer combustion gas cavity 203, damper 4, gas header pipe 6, burning torch 7, installing port 8, outer Gas Pipe 5, center exhaust gas nozzle 9, one-level cyclone 10, second cyclone 11.
Wherein, installing port 8 is made up of with the ring-type coaming plate 82 being connected to oral area baffle plate 81 edge vertical oral area baffle plate 81.
Gas header pipe 6 is positioned at the center of burner, through the oral area baffle plate 81 of installing port 8, extends to burner hearth; Outer Gas Pipe 5 and center exhaust gas nozzle 9 are several, and hoop is arranged symmetrically in the surrounding of gas header pipe 6, and is all communicated with gas header pipe 6, and wherein, center exhaust gas nozzle 9 is arranged in center, and outer Gas Pipe 5 is arranged in periphery.
Center sleeve 202 is enclosed between center exhaust gas nozzle 9 and outer Gas Pipe 5.Outer combustion gas cavity 203 one end is connected with the ejiction opening of outer Gas Pipe 5, is distributed with the outer combustion gas spout 12 that hoop is arranged symmetrically with above the end face of the other end.
The rear portion of grate firing gas cavity 203 is provided with vertical air intake dividing plate 21 outside, and this air intake dividing plate 21 is welded on center sleeve 202, and damper 4 is arranged between this air intake dividing plate 21 and outer combustion gas cavity 203.Venturi passage 2 is also formed outside between the inside panel 213 of grate firing gas cavity 203 and center sleeve 202.Outlet 22 position of venturi passage 2 is slightly more advanced than the nozzle exit area of center exhaust gas nozzle 9.
The termination of gas header pipe 6 also distribution rings to the combustion gas spout arranged.One-level cyclone 10 is arranged on the termination of gas header pipe 6 and can carries out axial location slidable adjustment on the termination of gas header pipe 6, and the proper ratio of pressing for rotational flow air and direct current air is distributed.The combustion gas spout of center exhaust gas nozzle 9 is positioned at the rear of one-level cyclone 10 just, and position is close.
Second cyclone 11 is arranged on the termination of center sleeve 202, i.e. outlet 22 position of venturi passage 2, and this second cyclone 11 can carry out axial location slidable adjustment on the termination of center sleeve 202, the proper ratio of pressing for rotational flow air and direct current air is distributed.
It is other that burning torch 7 is fixed on gas header pipe 6, and its igniter head is close to the combustion gas spout of center exhaust gas nozzle 9.
In addition, between the hoop coaming plate 82 and air intake dividing plate 21 of installing port 8, have air intake gap 23, the passage through air intake gap 23, between oral area baffle plate 81 and air intake dividing plate 21, the inside of cylindrical central sleeve 202 form center wind duct 101.Outer wind passage 1 is formed between the exterior panel 223 of outer combustion gas cavity 203 and furnace wall 100.Internal layer wind path 10 2 is formed through damper 4 and venturi passage 2.
In this low nitrogen oxide burner, one-level cyclone 10, center exhaust gas nozzle 9 define single-stage combustion device.Center exhaust gas nozzle 9, by combustion gas dispersion supply, avoids combustion gas mixing in mixed airflow insufficient; Venturi passage 2, second cyclone 11, outer combustion gas spout 12 define two stage burner, are arranged in the periphery of single-stage combustion device.The wind entered in inner-layer channel 102 accelerates to flow out by venturi passage 2, and part is through the ejection of second cyclone eddy flow, and Partial DC sprays.Combustion gas spout is by possible angle dispersion ejection.
Burning torch 7 utilizes a small amount of combustion gas and air to produce and stabilizes the flame, for the main burner effect of igniting.
The system composition of low nitrogen oxide gas burner of the present invention, different from other low nitrogen oxide burner, the present invention adopts the method for fuel staging and air classification, by combustion gas and air stoichiometry, in single-stage combustion device combustion zone, ensure combustion with meagre oxygen occurs, and in two stage burner combustion zone, there is oxygen-excess combustion, simultaneously outside two stage burner, air produces High-speed DC wind by the acceleration of Venturi tube, the flue gas that combustion flame produces can be entrainmented go back to combustion zone, reduce the average flame temperature of combustion zone.In the outermost of combustion flame, arrange a small amount of direct current wind, directly blow to flame afterbody and part unburned completely high-temperature fuel gas again carry out combustion reaction.This design ensures that combustion flame is full of burner hearth, and combustion zone homogeneous flame temperature, produce without obvious high-temperature area, and then inhibit discharged nitrous oxides.
Therefore, the present invention has combustion zone homogeneous flame temperature, produces without obvious high-temperature area, and then inhibits the advantage of discharged nitrous oxides.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention; have in any art and usually know the knowledgeable; if in the protection domain not departing from claim proposed by the invention; utilize the Equivalent embodiments that the local done by disclosed technology contents is changed or modified, and do not depart from technical characteristic content of the present invention, all still belong in the scope of the technology of the present invention feature.

Claims (8)

1. a low nitrogen oxide burner, is characterized in that: comprise single-stage combustion device and two stage burner; Center is located at by described single-stage combustion device, and the periphery of described single-stage combustion device is located at by described second gas burning burner; The center exhaust gas nozzle that described single-stage combustion device is arranged symmetrically with by hoop is formed with the one-level cyclone being located at exhaust gas nozzle front, center; Described two stage burner is made up of outer Gas Pipe, outer combustion gas spout, venturi passage and second cyclone, described outer combustion gas spout and the equal hoop of outer Gas Pipe are arranged symmetrically with, described outer combustion gas spout is communicated with outer Gas Pipe by outer combustion gas cavity, described venturi passage is located between outer combustion gas spout and center exhaust gas nozzle, and described second cyclone is located at the exit of described venturi passage.
2. low nitrogen oxide burner according to claim 1, is characterized in that: also include gas header pipe, and described outer Gas Pipe is all communicated with described gas header pipe with described center exhaust gas nozzle.
3. low nitrogen oxide burner according to claim 1, it is characterized in that: described gas header pipe and center exhaust gas nozzle are positioned at a cylindrical central sleeve, described center sleeve inside forms center wind duct, form internal layer wind passage between described cylindrical central sleeve and described outer Gas Pipe, outer combustion gas cavity, described venturi passage is positioned at the exit of described internal layer wind passage.
4. low nitrogen oxide burner according to claim 3, is characterized in that: form outer wind passage between described outer combustion gas cavity and furnace wall.
5. low nitrogen oxide burner according to claim 4, it is characterized in that: the rear portion of described outer combustion gas cavity is provided with and is connected on center sleeve and the vertical air intake dividing plate arranged, is provided with damper between described air intake dividing plate and described outer combustion gas cavity.
6. low nitrogen oxide burner according to claim 5, is characterized in that: have the air intake gap being communicated to center wind duct between described air intake dividing plate and installing port.
7. the combustion method of low nitrogen oxide burner according to the arbitrary claim of claim 1-6, it is characterized in that: by controlling combustion gas and air stoichiometry, generated the single-stage combustion region of carrying out combustion with meagre oxygen by single-stage combustion device, generated the secondary firing region being positioned at described single-stage combustion areas outside of carrying out oxygen-excess combustion by two stage burner.
8. the combustion method of low nitrogen oxide burner according to claim 7, is characterized in that: air produces High-speed DC wind by the acceleration of described venturi passage, and the flue gas that the combustion flame in single-stage combustion region produces is entrainmented go back to single-stage combustion region.
CN201510026013.0A 2015-01-19 2015-01-19 Low-nitrogen-oxide gas combustor and combustion method of combustor CN104595900B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106568083A (en) * 2016-11-07 2017-04-19 北京航天石化技术装备工程有限公司 Side wall low-nitric-oxide gas burner of cracking furnace
CN108224425A (en) * 2016-12-07 2018-06-29 丰田自动车株式会社 Hydrogen gas combustor structure and the hydrogen gas combustor device including hydrogen gas combustor structure
CN109654539A (en) * 2018-12-07 2019-04-19 中国航发沈阳发动机研究所 A kind of dry low emission gas turbine combustors
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 (5)

* 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
KR20120046881A (en) * 2010-10-29 2012-05-11 주식회사 수국 Low nitrogen oxide 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

Patent Citations (5)

* 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
KR20120046881A (en) * 2010-10-29 2012-05-11 주식회사 수국 Low nitrogen oxide 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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106568083A (en) * 2016-11-07 2017-04-19 北京航天石化技术装备工程有限公司 Side wall low-nitric-oxide gas burner of cracking furnace
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
CN108224425A (en) * 2016-12-07 2018-06-29 丰田自动车株式会社 Hydrogen gas combustor structure and the hydrogen gas combustor device including hydrogen gas combustor structure
CN109654539A (en) * 2018-12-07 2019-04-19 中国航发沈阳发动机研究所 A kind of dry low emission gas turbine combustors
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

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