CN110360553B - Industrial gas and smoke self-circulation ultralow nitrogen burner - Google Patents
Industrial gas and smoke self-circulation ultralow nitrogen burner Download PDFInfo
- Publication number
- CN110360553B CN110360553B CN201810308794.6A CN201810308794A CN110360553B CN 110360553 B CN110360553 B CN 110360553B CN 201810308794 A CN201810308794 A CN 201810308794A CN 110360553 B CN110360553 B CN 110360553B
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- China
- Prior art keywords
- main body
- burner
- combustion
- smoke
- flame spraying
- Prior art date
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000000779 smoke Substances 0.000 title claims abstract description 32
- 239000007789 gas Substances 0.000 title claims abstract description 25
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 34
- 238000004062 sedimentation Methods 0.000 claims abstract description 19
- 238000010285 flame spraying Methods 0.000 claims abstract description 18
- 238000010992 reflux Methods 0.000 claims abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003546 flue gas Substances 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 abstract description 12
- 239000002737 fuel gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses an industrial gas and smoke self-circulation ultralow nitrogen burner, which belongs to the technical field of gas combustion devices and comprises a burner main body, wherein a combustion cover is arranged above the burner main body, and a circle of smoke reflux holes are arranged at the joint of the burner main body and the combustion cover at intervals; the upper part of the burner main body is a combustion tube main body, and the lower part of the burner main body is an air chamber; the circumference of the combustion tube main body is provided with a circle of unit flame spraying holes, the bottoms of the unit flame spraying holes are respectively communicated with the air chamber, and the middle part of the combustion tube main body is provided with a sedimentation zone. According to the industrial gas and smoke self-circulation ultralow-nitrogen burner, the flame temperature is reduced, the nitrogen reduction effect is obvious, and the energy-saving effect is better by arranging the unit flame spraying holes and arranging the sedimentation area in the middle of the combustion tube main body.
Description
Technical Field
The invention belongs to the technical field of gas combustion devices, and particularly relates to an industrial gas and smoke self-circulation ultralow-nitrogen burner.
Background
Currently, in industrial production, in order to reduce the content of nitrogen oxides in flue gas, secondary combustion of air and fuel gas is generally used to reduce flame temperature, so as to achieve the effect of reducing nitrogen, and the manner of reducing nitrogen is at the cost of consuming more heat energy, namely wasting fuel gas. Meanwhile, the nitrogen reduction mode cannot be realized for high-temperature furnaces (such as cracking furnaces and glass kilns).
In recent years, a flue gas is externally connected with a pipeline, and a fan is used for pumping a part of flue gas back into combustion air so as to reduce the oxygen content in the air and achieve the purpose of reducing nitrogen. In practical application, the mode causes unstable combustion (frequently detonating sound) of flame due to the reduction of oxygen content, and potential safety hazard is increased. Meanwhile, water generated by cooling a large amount of water vapor in the flue gas has serious corrosion effect on the pipeline, and the investment and use cost are increased.
Disclosure of Invention
The invention aims to: the invention aims to provide an industrial gas and smoke self-circulation ultralow-nitrogen burner, which realizes self-circulation of smoke in combustion by adopting Bernoulli principle, thereby achieving the effect of reducing nitrogen.
The technical scheme is as follows: in order to achieve the above purpose, the present invention adopts the following technical scheme:
The industrial gas and smoke self-circulation ultralow-nitrogen burner comprises a burner main body, wherein a combustion cover is arranged above the burner main body, and a circle of smoke reflux holes are arranged at the joint of the burner main body and the combustion cover at intervals; the upper part of the burner main body is a burner pipe main body, and the lower part of the burner main body is an air chamber; the circumference of the combustion tube main body is provided with a circle of unit flame spraying holes, the bottoms of the unit flame spraying holes are respectively communicated with the air chamber, and the middle part of the combustion tube main body is provided with a sedimentation zone.
The sedimentation zone comprises a middle sedimentation opening and a middle sedimentation space.
The middle sedimentation space is respectively communicated with the unit flaming holes arranged circumferentially.
The flue gas reflow holes are horn-shaped openings, and the horn-shaped openings are arranged in one-to-one correspondence with the unit flaming holes.
The smoke reflux hole is aligned with the flame spraying opening of the flame spraying hole of the unit.
The beneficial effects are that: compared with the prior art, the industrial gas and smoke self-circulation ultralow-nitrogen burner has the advantages that through the arrangement of the unit flame spraying holes, the smoke with relatively high temperature in the combustion cover and the smoke with relatively low temperature outside the combustion cover are mutually mixed at the flame spraying ports of the unit flame spraying holes, so that the uniformity of mixed gas is improved, the reflowed smoke is subjected to secondary combustion, the burnout rate of the gas is higher, and the oxygen content of the smoke is reduced; by arranging a sedimentation area in the middle of the combustion tube main body, when the uniformly distributed circumferential distribution unit flame spraying holes are burnt, strong negative pressure is formed in the middle, the smoke is sucked into the smoke reflux holes, and the smoke completely enters the combustion tube under the action of the negative pressure and is merged with mixed gas (fuel gas and air); the flame temperature is reduced, the nitrogen reduction effect is obvious, the emission of nitrogen oxides is lower than 15ppm at the furnace temperature of about 1000 ℃, and the mode can not only reduce a large amount of nitrogen, but also enable combustion to be more stable and have better energy-saving effect.
Drawings
FIG. 1 is a cross-sectional view of an industrial gas flue gas self-circulating ultra-low nitrogen burner;
fig. 2 is a top view of an industrial gas flue gas self-circulating ultra-low nitrogen burner.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-2, the reference numerals are as follows: the burner comprises a burner main body 1, an air chamber 2, a gas inlet 3, a unit flame tube 4, a middle sedimentation space 5, a flue gas reflux hole 6, a combustion cover 7, a middle sedimentation opening 8 and a combustion tube main body 9. The direction indicated by the arrow in fig. 1 is the gas flow direction.
The industrial gas and smoke self-circulation ultralow nitrogen burner is integrally manufactured and formed by a die and comprises a burner main body 1, a combustion cover 7 is arranged above the burner main body 1, and a circle of smoke reflux holes 6 are arranged at the joint of the burner main body 1 and the combustion cover 7 at intervals.
The upper part of the burner body 1 is a burner tube body 9, the lower part of the burner body 1 is an air chamber 2, a gas inlet 3 is provided on one side of the air chamber 2, and gas enters the air chamber 2 from the gas inlet 3.
The circumference at combustion tube main part 9 sets up round unit fire tube 4, and unit fire tube 4's bottom all is linked together with air chamber 2 respectively, is equipped with the subsidence area at the middle part of combustion tube main part 9, and the subsidence area includes middle part subsidence mouth 8 and middle part subsidence space 5. The middle sedimentation space 5 is respectively communicated with the unit fire-spraying pipes 4 arranged circumferentially. Wherein the sinking depth of the middle sedimentation space 5 is 20-40% of the length of the unit flaming tube 4.
The smoke reflow holes 6 are horn-shaped openings, the smaller caliber ends of the horn-shaped openings are aligned with the unit fire-spraying pipes 4 and are arranged in one-to-one correspondence with the unit fire-spraying pipes 4, and the smoke reflow holes 6 are aligned with the fire-spraying openings of the unit fire-spraying pipes 4. The position of the back flow smoke in the flame directly influences the utilization effect of the back flow smoke, which is also lacking in the current research. Experiments prove that the returned smoke is positioned at the flaming port of the unit flaming pipe 4, and a good effect is obtained.
The working process comprises the following steps: the unit fire-spraying pipes 4 are circumferentially and uniformly distributed, when the fuel gas and the air are sprayed at a higher speed and burnt, negative pressure is circumferentially formed at the fire-spraying opening of each unit fire-spraying pipe 4 according to Bernoulli theory, and the surrounding flue gas is rolled and sucked into the fire-spraying opening of the unit fire-spraying pipe 4 to achieve the effect of backflow of the flue gas and nitrogen reduction.
The unit fire-spraying pipes 4 are circumferentially and uniformly distributed to form a middle sedimentation space 5, and the middle sedimentation space 5 is communicated with each unit fire-spraying pipe 4; when the uniformly distributed circumferential distribution unit fire-spraying pipes 4 are burnt, a strong negative pressure is formed in the middle of the uniformly distributed circumferential distribution unit fire-spraying pipes, the smoke is sucked into the smoke reflux holes 6, and the smoke completely enters the unit fire-spraying pipes 4 under the action of the negative pressure and is merged with mixed gas (fuel gas and air).
The flue gas with relatively higher temperature in the combustion cover 7 and the flue gas with relatively lower temperature outside the combustion cover 7 are mutually mixed at the flame spraying port of the unit flame spraying pipe 4, so that the uniformity of mixed gas is increased, and meanwhile, the reflowed flue gas is subjected to secondary combustion, so that the burnout rate of the fuel gas is higher, the oxygen content of the flue gas is reduced, the flame temperature is reduced, and the nitrogen reduction effect is obvious; the size of the smoke reflux hole 6 is set according to the requirement, so that the ultralow nitrogen effect lower than 15ppm can be obtained.
Claims (2)
1. Industrial gas flue gas self-circulation ultralow nitrogen combustor, its characterized in that: the burner comprises a burner main body (1), wherein a combustion cover (7) is arranged above the burner main body (1), a circle of smoke reflux holes (6) are formed in the joint of the burner main body (1) and the combustion cover (7) at intervals, the upper part of the burner main body (1) is a burner pipe main body (9), the lower part of the burner main body (1) is an air chamber (2), a circle of unit flame spraying holes (4) are formed in the circumferential direction of the burner pipe main body (9), and the bottoms of the unit flame spraying holes (4) are respectively communicated with the air chamber (2); a sedimentation zone is arranged in the middle of the combustion tube main body (9); the sedimentation zone comprises a middle sedimentation opening (8) and a middle sedimentation space (5); the middle sedimentation space (5) is respectively communicated with the unit fire spraying holes (4) which are circumferentially arranged; the flue gas reflux holes (6) are horn-shaped openings, and the horn-shaped openings are arranged in one-to-one correspondence with the unit flame spraying holes (4).
2. The industrial gas flue gas self-circulating ultra-low nitrogen burner of claim 1, wherein: the smoke reflux hole (6) is aligned with the flame spraying opening of the unit flame spraying hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810308794.6A CN110360553B (en) | 2018-04-09 | 2018-04-09 | Industrial gas and smoke self-circulation ultralow nitrogen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810308794.6A CN110360553B (en) | 2018-04-09 | 2018-04-09 | Industrial gas and smoke self-circulation ultralow nitrogen burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110360553A CN110360553A (en) | 2019-10-22 |
| CN110360553B true CN110360553B (en) | 2024-06-25 |
Family
ID=68213502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810308794.6A Active CN110360553B (en) | 2018-04-09 | 2018-04-09 | Industrial gas and smoke self-circulation ultralow nitrogen burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110360553B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208349292U (en) * | 2018-04-09 | 2019-01-08 | 南京冉星环保科技有限公司 | The super low NO of industrial combustion gas flue gas self-loopa |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0558455B1 (en) * | 1992-02-28 | 1996-09-04 | Füllemann Patent Ag | Burner, particularly oil burner or combined oil/gas-burner |
| DE4238529C2 (en) * | 1992-11-14 | 1999-02-04 | Deutsch Zentr Luft & Raumfahrt | Burners for hot gas generation |
| JP4019572B2 (en) * | 1999-09-17 | 2007-12-12 | 有限会社藤村製作所 | Gas burner |
| JP4323686B2 (en) * | 2000-06-16 | 2009-09-02 | 大陽日酸株式会社 | Low NOx burner and its operation method |
| JP2002213711A (en) * | 2001-01-15 | 2002-07-31 | Ishikawajima Harima Heavy Ind Co Ltd | COMBUSTION METHOD FOR EFFECTING COMBUSTION AT LOW NOx AND ITS COMBUSTION DEVICE |
| US6884062B2 (en) * | 2002-03-16 | 2005-04-26 | Exxonmobil Chemical Patents Inc. | Burner design for achieving higher rates of flue gas recirculation |
| KR101278280B1 (en) * | 2010-12-28 | 2013-06-24 | 주식회사 수국 | Low nitrogen oxide burner |
| CN202132958U (en) * | 2011-06-03 | 2012-02-01 | 王兴文 | Burner brick at burner part of exhaust burning hot air furnace |
| CN105114951B (en) * | 2015-08-21 | 2018-07-27 | 北京航天石化技术装备工程有限公司 | The low nitrogen oxygen gas burner of the double classifications of trailing edge reflux |
| CN106402861B (en) * | 2016-11-11 | 2018-03-06 | 江苏弗雷姆环境科技有限公司 | The ultralow indole energy spiral combustion head of industrial combustion gas and burner |
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2018
- 2018-04-09 CN CN201810308794.6A patent/CN110360553B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208349292U (en) * | 2018-04-09 | 2019-01-08 | 南京冉星环保科技有限公司 | The super low NO of industrial combustion gas flue gas self-loopa |
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| CN110360553A (en) | 2019-10-22 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240124 Address after: 210000, Building 1-1, West Street, Qiaolin Street, Pukou District, Nanjing City, Jiangsu Province Applicant after: JIANGSU FULEIMU ENVIRONMENT TECHNOLOGY CO.,LTD. Country or region after: China Address before: Room 508, Building 04, No.1 Kechuang Road, Yaohua Street, Qixia District, Nanjing City, Jiangsu Province, 210046 Applicant before: NANJING RANXING ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Country or region before: China |
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