CN217816730U - Full-premixing bluff body flame-stabilizing low-nitrogen combustor - Google Patents
Full-premixing bluff body flame-stabilizing low-nitrogen combustor Download PDFInfo
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- CN217816730U CN217816730U CN202220805140.6U CN202220805140U CN217816730U CN 217816730 U CN217816730 U CN 217816730U CN 202220805140 U CN202220805140 U CN 202220805140U CN 217816730 U CN217816730 U CN 217816730U
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- bluff body
- air inlet
- inlet section
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 47
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 238000011161 development Methods 0.000 claims description 21
- 239000003381 stabilizer Substances 0.000 claims description 18
- 230000008602 contraction Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000010411 cooking Methods 0.000 claims description 7
- 239000002737 fuel gas Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 9
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009841 combustion method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
Abstract
The utility model discloses a full premix bluff body flame stabilization low-nitrogen burner, which comprises a combustion-supporting air inlet section and a main gas pipeline, wherein the main gas pipeline is inserted in the combustion-supporting air inlet section, and the end part of the combustion-supporting air inlet section is provided with a bluff body flame stabilization structure; the utility model relates to a combustor technical field has formed the formula of mixing burning in advance because complete premixing for can realize complete combustion under the best excess air coefficient, make nitrogen oxide's emission value very low. Each combustion area is subjected to rotational flow to generate mixing effect and shearing effect, intense substance and heat transfer is carried out, and stable and efficient combustion areas are formed together.
Description
Technical Field
The utility model relates to a combustor technical field specifically is a bluff body steady flame low NOx burner is mixed in advance entirely.
Background
The burner is an important component of an industrial boiler, is a main device for releasing fuel energy into heat energy, and can be divided into a gas burner, an oil burner and the like according to different fuel types. The gas burner may be classified into a premix burner and a diffusion burner based on whether or not premixing is performed.
The premix burner is designed according to a complete premix combustion method, in which before combustion, gas and supply air are premixed and ejected through an air nozzle (or a metal fiber burner head) of the burner to be combusted. The premixing burner is premixed uniformly, so that complete combustion can be realized under the optimal excess air coefficient, in addition, the temperature is uniform during combustion, local high temperature is not easy to occur, and the emission of nitrogen oxides is effectively reduced. However, if the surface of the metal fiber is burnt, the tempering phenomenon is easily generated.
The diffusion burner is a burner designed according to the diffusion combustion method, and air required for combustion is supplied during the combustion process. The air and the fuel gas of the burner are difficult to be uniformly mixed, local high temperature is easy to occur, the temperature distribution in a hearth is uneven, and the emission of nitrogen oxides is easy to increase. Therefore, the premixed combustion technology is a more effective method for reducing nitrogen oxides, but the premixed combustion has risks such as backfire and deflagration, so that the premixed combustion is a problem to be solved by designers in order to reduce NOx, ensure sufficient combustion of fuel and ensure stable and safe operation of a combustor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a bluff body steady flame low NOx burner mixes in advance has solved current background technical problem.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a full-premixing bluff body flame-stabilizing low-nitrogen burner comprises a combustion-supporting air inlet section and a main gas pipeline, wherein the main gas pipeline is inserted into the combustion-supporting air inlet section, and the end part of the combustion-supporting air inlet section is provided with a bluff body flame-stabilizing structure;
the bluff body flame stabilizing structure comprises: the device comprises a contraction section, a straight development section, a bluff body flow stabilizer and a plurality of rotational flow air outlet blades;
the end part of the combustion-supporting air inlet section is provided with a contraction section with a conical ring structure, the end part of the contraction section is connected with a straight development section, and the end part of the straight development section is connected with a heating cooking range;
the diameter of the combustion-supporting air inlet section is larger than that of the straight development section;
a blunt body flow stabilizer is arranged in the straight development section, and a plurality of rotational flow air outlet blades are arranged on one side of the blunt body flow stabilizer;
the end part of the main gas pipeline is connected with a rotational flow air inlet heating structure.
Preferably, the swirl intake heating structure includes: a plurality of fuel gas branch pipes, a plurality of fuel gas outlet holes and a plurality of rotational flow mixing blades;
the both sides symmetrical arrangement of main gas pipeline has a plurality ofly to the inner wall that the gas branch pipe is connected in combustion-supporting air inlet section, a plurality of gas ventholes have been seted up on the gas branch pipe, the tip of main gas pipeline sets up the cover and is equipped with a plurality of whirl mixing blade.
Preferably, the kitchen range expansion section provided with the horn-shaped groove in the heating kitchen range is communicated with the end part of the straight development section.
Preferably, the rotational flow angle of the rotational flow mixing blades is 20-60 degrees.
Preferably, the main gas pipeline is axially overlapped with the combustion-supporting air inlet section, the contraction section and the straight development section.
Preferably, the central column of the blunt body flow stabilizer, which is provided with the mounting shaft and the rotational flow air outlet blade at the center, is in axial threaded connection, and the distance can be linearly adjusted.
Advantageous effects
The utility model provides a full premix bluff body flame stabilization low NOx burner. The method has the following beneficial effects:
(1) The burner has simple structure and low production cost;
(2) The premixing type combustion has better nitrogen reduction effect;
(3) The problems that the air and the fuel gas of the diffusion type combustor are difficult to be mixed uniformly, local high temperature is easy to occur, the temperature distribution in a hearth is uneven, and the emission of nitrogen oxides is easy to rise are solved.
(4) The problem of blockage of a mixer and a combustion head of a metal fiber surface type full premix burner is solved, the daily maintenance is simpler, and the maintenance cost is lower;
(5) And a bluff body flame stabilizing technology is adopted, so that the flame is more stable and is not easy to temper.
Drawings
Fig. 1 is a schematic view of a structure of a fully premixed bluff body flame-stabilized low-nitrogen burner according to the present invention.
Fig. 2 is a schematic side view of a fully premixed bluff body flame-stabilized low-nitrogen burner of the present invention.
Fig. 3 is a cutaway axonometric view of a full premix bluff body flame stabilized low-nitrogen burner of the present invention.
In the figure: 1. a combustion-supporting air inlet section; 2. a main gas pipeline; 3. a gas branch pipe; 4. a gas outlet hole; 5. a swirl mixing vane; 6. a contraction section; 7. a straight development section; 8. a rotational flow air outlet blade; 9. a bluff body current stabilizer; 10. installing a shaft; 11. heating a cooking range; 12. a cooking range expansion section; 13. a central column.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
All the electrical components in the present application are connected with the power supply adapted to the electrical components through a wire, and an appropriate controller and an appropriate encoder should be selected according to actual conditions to meet control requirements, and specific connection and control sequences should be obtained.
Example (b): according to the attached figures 1-3 of the specification, the scheme is that the full-premixing bluff body flame-stabilizing low-nitrogen combustor comprises a combustion-supporting air inlet section 1; a main gas pipeline 2, a gas branch pipe 3 and a rotational flow mixing blade 5 are arranged in the combustion-supporting air inlet section 1;
the downstream of the combustion-supporting air inlet section 1 is connected with a contraction section 6, the downstream of the contraction section 6 is connected with a straight development section 7, the downstream of the straight development section 7 is connected with a heating burner 11, and the heating burner 11 comprises a burner expansion section 12; the main gas pipeline 2, the contraction section 6, the straight development section 7 and the combustion-supporting air inlet section 1 are coaxially arranged; the tail end of the straight development section 7 is provided with a cyclone gas outlet blade 8 and a bluff body flow stabilizer 9; the blunt body surface of the blunt body current stabilizer 9 is positioned in the kitchen range expansion section 12, and the mounting shaft 10 of the blunt body current stabilizer 9 is positioned on the central column 13 of the rotational flow air outlet blade 8;
the combustion-supporting air inlet section 1 is used for allowing air to flow into a channel of the combustor, and the main gas pipeline 2 is used for allowing gas to enter the channel of the combustor. The gas flows in from main gas pipeline 2, is spouted by a plurality of gas ventholes 4 that the gas branch pipe 3 both sides distribute, and the combustion-supporting wind who comes from combustion-supporting wind inlet section 1 carries out the primary mixing, and the gas mixture forms the whirl behind the swirl mixing blade 5 of combustion-supporting wind inlet section 1 downstream flow through, has carried out the secondary mixing, strengthens mixing effect. The mixed gas continues to be developed downstream from the contraction section 6, the mixed gas is compressed and accelerated due to the contraction effect of the contraction section 6, the mixed gas continuously enters the straight development section 7 after being mixed in the contraction section 6, the mixed gas is fully mixed in the straight development section 7, the uniform mixed gas is formed, then the swirling gas is formed after the swirling gas outlet blade 8, the swirling gas is jetted and combusted along the outer edge of the blunt body flow stabilizer 9 and the circumferential weld of the cooking range expansion section 12 after impacting the blunt body flow stabilizer 9, and the speed of the mixed gas is continuously reduced due to the expansion effect of the cooking range expansion section 12, so that a stable combustion area is formed in the cooking range expansion section 12; the mixed gas flow can form a backflow area in the downstream central area of the bluff body flow stabilizer 9 after passing through the bluff body flow stabilizer 9, so that the effect of stabilizing flame is achieved, the combustion is more stable, and the tempering is not easy to occur.
Due to the complete premixing, premixed combustion is formed, complete combustion can be realized under the optimal excess air coefficient, and the emission value of nitrogen oxides is low. Each combustion area is subjected to the swirling flow to generate a mixing effect and a shearing effect, intense substance and heat transfer is carried out, and a stable and efficient combustion area is formed together.
As a technical optimization scheme of the utility model, 5 numbers of whirl mixing vanes are 4 ~ 15.
As a technical optimization scheme of the utility model, the rotational flow angle of the rotational flow mixing blade 5 is 20 degrees to 60 degrees.
As a technical optimization scheme of the utility model, the number of the air outlet grooves of the combustion tube is 4-10.
As a technical optimization scheme of the utility model, the number of the air outlet holes of the combustion tube is 6-20.
As a technical optimization scheme of the utility model, 8 numbers of the blades of giving vent to anger of whirl are 4 ~ 15.
As a technical optimization scheme of the utility model, the rotational flow angle of the rotational flow air outlet blade 8 is 20-60 degrees.
As a technical optimization scheme of the utility model, blunt body current stabilizer 9 of blunt body current stabilizer 9 installs axle 10 and the whirl of axle 8 center posts 13 of giving vent to anger and be axial bolted connection, can the fore-and-aft regulation distance.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A full-premixing bluff body flame-stabilizing low-nitrogen burner comprises a combustion-supporting air inlet section (1) and a main gas pipeline (2), wherein the main gas pipeline (2) is inserted into the combustion-supporting air inlet section (1), and is characterized in that a bluff body flame-stabilizing structure is arranged at the end part of the combustion-supporting air inlet section (1);
the bluff body flame stabilizing structure comprises: a contraction section (6), a straight development section (7), a bluff body flow stabilizer (9) and a plurality of rotational flow air outlet blades (8);
the end part of the combustion-supporting air inlet section is provided with a contraction section (6) with a conical ring structure, the end part of the contraction section (6) is connected with a straight development section (7), and the end part of the straight development section is connected with a heating cooking range (11);
the diameter of the combustion-supporting air inlet section is larger than that of the straight development section (7);
a blunt body flow stabilizer (9) is arranged in the straight development section, and a plurality of rotational flow air outlet blades (8) are arranged on one side of the blunt body flow stabilizer (9);
the end part of the main gas pipeline (2) is connected with a rotational flow air inlet heating structure.
2. The full premix bluff body flame-stabilized low-nitrogen burner of claim 1, wherein the swirl inlet heating structure comprises: a plurality of fuel gas branch pipes (3), a plurality of fuel gas outlet holes (4) and a plurality of swirl mixing blades (5);
the both sides symmetrical arrangement of main gas pipeline (2) has a plurality of to gas branch pipe (3) connect in the inner wall of combustion-supporting wind inlet section, a plurality of gas ventholes (4) have been seted up on gas branch pipe (3), the tip of main gas pipeline (2) sets up the cover and is equipped with a plurality of whirl mixing vane (5).
3. The full premix bluff body flame-stabilized low-nitrogen burner according to claim 1, wherein the burner expansion section (12) with the trumpet-shaped groove formed in the heating burner (11) is communicated with the end of the straight development section (7).
4. The full-premix bluff body flame-stabilized low-nitrogen burner according to claim 2, wherein the swirl angle of the plurality of swirl mixing vanes (5) is 20-60 °.
5. A fully premixed bluff body flame-stabilized low-nitrogen burner according to claim 1, wherein the main gas duct (2) axially coincides with the combustion air inlet section (1), the contraction section (6) and the straight development section (7).
6. The full-premix bluff body flame-stabilizing low-nitrogen burner as claimed in claim 1, wherein the center of the bluff body flow stabilizer (9) is provided with a mounting shaft (10) and a central column (13) of the swirl air outlet blade (8) which are in axial threaded connection, and the distance can be linearly adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220805140.6U CN217816730U (en) | 2022-04-08 | 2022-04-08 | Full-premixing bluff body flame-stabilizing low-nitrogen combustor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220805140.6U CN217816730U (en) | 2022-04-08 | 2022-04-08 | Full-premixing bluff body flame-stabilizing low-nitrogen combustor |
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| CN217816730U true CN217816730U (en) | 2022-11-15 |
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| CN202220805140.6U Active CN217816730U (en) | 2022-04-08 | 2022-04-08 | Full-premixing bluff body flame-stabilizing low-nitrogen combustor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789638A (en) * | 2022-11-29 | 2023-03-14 | 岳阳钟鼎热工电磁科技有限公司 | Full premix type flameless combustion system for pure oxygen combustion |
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2022
- 2022-04-08 CN CN202220805140.6U patent/CN217816730U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789638A (en) * | 2022-11-29 | 2023-03-14 | 岳阳钟鼎热工电磁科技有限公司 | Full premix type flameless combustion system for pure oxygen combustion |
| CN115789638B (en) * | 2022-11-29 | 2024-02-13 | 湖南钟鼎热工科技股份有限公司 | Full-premix pure oxygen combustion flameless combustion system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Haocai Digital Technology Co.,Ltd. Assignor: SHENZHEN JIAYUNTONG ELECTRONICS Co.,Ltd. Contract record no.: X2023980052402 Denomination of utility model: A Fully Premixed Bluff Body Stable Flame Low Nitrogen Burner Granted publication date: 20221115 License type: Common License Record date: 20231214 |