CN108730978B - Self-circulation low-nitrogen gas burner with adjustable flue gas in furnace - Google Patents
Self-circulation low-nitrogen gas burner with adjustable flue gas in furnace Download PDFInfo
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- CN108730978B CN108730978B CN201810476969.4A CN201810476969A CN108730978B CN 108730978 B CN108730978 B CN 108730978B CN 201810476969 A CN201810476969 A CN 201810476969A CN 108730978 B CN108730978 B CN 108730978B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000003546 flue gas Substances 0.000 title claims abstract description 53
- 229910001873 dinitrogen Inorganic materials 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims abstract description 71
- 239000007789 gas Substances 0.000 claims abstract description 56
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000779 smoke Substances 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000010992 reflux Methods 0.000 claims description 21
- 230000001502 supplementing effect Effects 0.000 claims description 12
- 230000004323 axial length Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 10
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 239000002737 fuel gas Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002918 waste heat Substances 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
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to a self-circulation low-nitrogen gas burner with adjustable flue gas in a furnace, which comprises a combustion cylinder with an axial air inlet, a radial gas inlet and an axial outlet, wherein a gas pipe connected with the radial gas inlet is coaxially arranged in the combustion cylinder, and an ignition device and a flame stabilizing plate are arranged at the axial outlet. The combustion cylinder comprises a first cylinder body and a second cylinder body which are sequentially connected along the axial conveying direction of the gas, a plurality of reflow holes are formed in the second cylinder body, and a flue gas reflow amount adjusting structure for adjusting the size of the reflow holes is correspondingly arranged in the combustion cylinder; the gas pipe is coaxially sleeved with a wind guide disc at a position close to the reflow hole, the wind guide disc extends out of the hollow round platform peripheral wall with an opening gradually increased towards the axial output direction of the gas, a wind guide channel is formed between the wind guide disc and the second cylinder, and the cross section size of the wind guide channel is gradually reduced along the axial conveying direction of the gas. The structure achieves the purpose of self-circulation and secondary combustion of the smoke through negative pressure difference, and low nitrogen emission is achieved.
Description
Technical Field
The invention relates to the technical field of burner manufacturing, in particular to a self-circulation low-nitrogen gas burner with adjustable flue gas in a furnace.
Background
The NOx emission of the existing burner is generally low in nitrogen level (below 80mg/m W), and the existing technology can reach very low in nitrogen level (below 30mg/m W). Even if FGR technology is applied, the mixture is unstable in daily operation, and the main reason is that the three-gas ratio is difficult to control.
Common low nitrogen combustion technologies mainly comprise staged combustion, premixed combustion technology, flue gas recirculation and the like. Wherein, the staged combustion technology requires uniform temperature in the furnace, avoids local high temperature, thereby reducing NOx generation, but how to realize good air/gas staging is a difficult point. The premixed combustion technology is difficult to control the mixing effect of two gases in practical application, has poor effect, is easy to generate the potential safety hazard of channeling caused by deflagration, and is less adopted. The flue gas recirculation technology extracts a part of the flue gas of the boiler and mixes the part of the flue gas with fresh air, and then the mixed flue gas is sent into a combustion furnace to be mixed with fuel gas for combustion, so that the oxygen concentration in the air is reduced, the probability of combining nitrogen and oxygen in the air is reduced, and the flue gas recirculation technology is widely applied in practice. However, the traditional flue gas recirculation needs to draw the flue gas back to the burner by means of a reflux fan, namely, the circulating flue gas pipeline and the control system need to be rearranged, the occupied space is large, the investment is high, and the power loss is 20-30%.
Disclosure of Invention
The invention aims to solve the technical problems, and provides the self-circulation low-nitrogen gas burner with adjustable flue gas in the boiler, wherein an automatic flue gas circulation channel is formed between a boiler hearth and a combustion cylinder, and the secondary decomposition combustion of the flue gas is realized in the combustion process, so that the emission of nitrogen oxides is effectively reduced.
The technical scheme of the invention is as follows:
the invention relates to a self-circulation low-nitrogen gas burner with adjustable flue gas in a furnace, which comprises a combustion cylinder, wherein the combustion cylinder is provided with an axial air inlet, a radial gas inlet and an axial outlet, a gas pipe connected with the radial gas inlet is coaxially arranged in the combustion cylinder, and an ignition device and a flame stabilizing plate are arranged at the axial outlet, and the self-circulation low-nitrogen gas burner is characterized in that: the combustion cylinder comprises a first cylinder body and a second cylinder body which are sequentially connected along the axial conveying direction of gas, a plurality of internal and external through backflow holes are formed in the circumferential wall of the second cylinder body, and a smoke backflow amount adjusting structure for adjusting the size of the backflow holes is correspondingly arranged in the combustion cylinder; the gas pipe is provided with a gas guide disc coaxially sleeved at a position close to the reflow hole, the gas guide disc extends towards the gas axial output direction to form a hollow round platform peripheral wall with an opening gradually increased, a gas guide channel is formed between the round platform peripheral wall and the inner wall of the second cylinder, and the cross section size of the gas guide channel is gradually reduced along the gas axial output direction.
By means of the structure, the invention uses aerodynamic principle, through the design of the hollow round platform peripheral wall of the air guide disc, the air guide channel is gradually contracted, the pressure intensity is improved, the smoke formed by burning at the axial outlet of the burning cylinder is automatically sucked into the reflow hole under the action of the internal and external pressure difference, and the smoke and the combustion air enter the air guide channel for secondary burning.
In the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the flue gas reflux quantity adjusting structure comprises an axially-through shielding cylinder, a plurality of axially-extending adjusting rods are arranged on the circumferential edge of one end ring of the shielding cylinder, the first cylinder is correspondingly provided with axially-extending sliding grooves, the adjusting rods are matched with the sliding grooves to be connected in a sliding manner and can be fixed through screws, and the other end of the shielding cylinder is in an inwards-retracted shape, so that the shielding cylinder can axially slidably shield reflux holes. The structure can axially slide and push the adjusting rod according to the actual combustion flame condition to realize variable adjustment of the size of the backflow hole, so that the smoke backflow amount is optimized, and the secondary combustion effect is ensured. And the shielding cylinder is retracted inwards, so that the gap between the backflow hole and the shielding cylinder is gradually expanded on the basis of the gradual contraction of the air guide channel, the flow speed is further accelerated, the formation of a negative pressure region between the shielding cylinder and the backflow hole is facilitated, and the backflow effect is effectively ensured.
Furthermore, in the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the reflux holes are uniformly distributed on the same dividing circle of the circumferential wall of the second cylinder body, so that the flue gas can be uniformly refluxed in all directions.
Further, in the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the backflow hole is in a long strip shape with semicircular two ends.
In the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the axial distance between the reflux hole and the ignition device is 20-80mm, so that the reflux distance is ensured to be long enough, and the reflux quantity is ensured to be large enough.
In the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the inclination angle of the generatrix of the circumferential wall of the round table relative to the central axis of the air guide disc is 22-25 degrees.
Further, in the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the axial length of the circumferential wall of the round table is 60mm. In the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, a plurality of air supplementing holes for air to pass through are formed in the air guide disc, so that sufficient air is supplemented for the central flame part, and the full combustion of the air guide disc is further promoted.
Further, in the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, the air supplementing holes are round, the aperture is 28-38mm, and the number of the air supplementing holes is 6-12.
In the self-circulation low-nitrogen gas burner with adjustable flue gas in the furnace, a plurality of transverse L-shaped shunt pipes uniformly extend around the circumferential wall of the gas pipe, and each shunt pipe is provided with a radially inward gas inner outlet and a radially outward gas outer outlet, so that the gas can be radially diffused and sprayed, the combustion range is further enlarged, and NOx generated by flame concentration is reduced.
The beneficial effects of the invention are as follows:
1. the invention forms internal and external pressure difference by the cooperation design of the round platform peripheral wall of the air guide disc and the reflow holes, achieves the purpose of automatic recycling of flue gas, does not need to purchase circulating flue gas equipment and arrange circulating pipelines, effectively reduces equipment investment under the effect of ensuring full combustion, has no power loss and has simple and compact volume.
2. According to the invention, the high-temperature combustion flue gas is circularly introduced into the combustion air, so that secondary combustion is performed on the combustible gas which is not fully combusted in the flue gas, the utilization rate of the fuel gas is improved, the waste heat of the flue gas is fully utilized, the temperature of the combustion air is obviously improved, the oxygen concentration of a flame high-temperature region is reduced, the temperature peak value of a combustion region is effectively reduced, the temperature is uniform, the generation amount of thermal NOx is obviously inhibited, and the combustion is stable and the combustion completeness is high. The secondary flue gas combustion in the hearth does not need FGR external circulation to consume motor power, thereby achieving the purpose of energy conservation.
3. The invention designs the smoke reflux quantity adjusting structure to realize the variable adjustment of the reflux holes, thereby changing the smoke reflux quantity, ensuring that the smoke reflux quantity reaches the optimal combustion state under different working conditions as much as possible, and having wider suitability. The adjusting mode is simple and flexible, and can be realized only by pushing the adjusting rod to axially slide.
4. The structure is additionally provided with the air supplementing holes of the air guide disc, and a large amount of air can be supplemented for the central area during gas combustion, so that the gas combustion is more complete, the flame combustion is ensured to be more stable, the combustion efficiency is improved, and the low-nitrogen combustion is realized. And the processing is simple, and the whole structure is not complicated because of the arrangement of the air supplementing holes.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic cross-sectional view of the present invention.
Fig. 3 is a schematic structural view of the shielding cylinder according to the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings:
referring to fig. 1 and 2, the self-circulation low-nitrogen gas burner with adjustable flue gas in a furnace according to the embodiment comprises a combustion cylinder 1, wherein the combustion cylinder 1 is provided with an axial air inlet, a radial gas inlet and an axial outlet, a gas pipe 2 connected with the radial gas inlet is coaxially arranged in the combustion cylinder 1, and an ignition device (not shown in the figure) and a flame stabilizing plate 3 are arranged at the axial outlet. The gas pipe 2 evenly extends a plurality of horizontal L-shaped shunt tubes 13 around the circumference wall, and each shunt tube 13 is provided with a radially inward gas inner outlet and a radially outward gas outer outlet. The fuel gas is axially conveyed in the fuel gas pipe 2, is radially and outwards guided into each shunt pipe 13 in the middle section area and is uniformly dispersed into a plurality of fuel gas flows, and then is continuously conveyed along the axial direction, and is inwards and outwards diffused through the fuel gas inner outlet and the fuel gas outer outlet to form a larger diffusion area, so that the combustion area is enlarged, the aim of uniformly distributing the temperature is fulfilled, and the emission of NOx is reduced.
The combustion cylinder 1 comprises a first cylinder body 4 and a second cylinder body 5 which are sequentially connected along the axial conveying direction of gas, and the first cylinder body 4 and the second cylinder body are detachably connected through screws. A plurality of internally and externally through reflux holes 6 are formed in the circumferential wall of the second cylinder 5, and the reflux holes 6 are uniformly distributed on the same dividing circle of the circumferential wall of the second cylinder 5. Specifically, the backflow hole 6 is in a long strip shape with semicircular two ends, and the axial distance from the backflow hole to the ignition device is 20-80mm, so that a long enough backflow distance is provided, and the backflow amount is further ensured.
And a smoke reflux quantity adjusting structure for adjusting the size of the reflux hole 6 is correspondingly arranged in the combustion cylinder 1. Specifically, as shown in fig. 3, the flue gas reflux amount adjusting structure comprises an axially penetrating shielding cylinder 9, a plurality of axially extending adjusting rods 10 are arranged on the circumferential edge of one end ring of the shielding cylinder 9, axially extending sliding grooves 11 are correspondingly arranged on the first cylinder 4, the adjusting rods 10 are matched with the sliding grooves 11 to be connected in a sliding manner and can be fixed through screws, the other end of the shielding cylinder 9 is in an inward retracted shape, and therefore the shielding cylinder 9 can axially slidably shield the reflux holes 6.
The gas pipe 2 is coaxially sleeved with a wind guide disc 7 at a position close to the reflow hole 6, the wind guide disc 7 extends to form a hollow round platform peripheral wall 8 with an opening gradually increased towards the axial output direction of the gas, a wind guide channel is formed between the round platform peripheral wall 8 and the inner wall of the second cylinder 5, and the cross section size of the wind guide channel is gradually reduced along the axial delivery direction of the gas. The air guide disc 7 and the second cylinder 5 are coaxially arranged, so that the consistency of upward pressure intensity can be ensured, and the smoke can enter uniformly and stably along all directions. It should be noted that, in this embodiment, the inclination angle of the generatrix of the circular truncated cone peripheral wall 8 relative to the central axis of the air guide disc 7 is 22-25 degrees, the axial length is 60mm, and the inclination angle and the axial distance are the optimal numerical ranges obtained after the test, so as to effectively ensure that the smoke reflux amount is sufficiently large. The air guiding disc 7 is also provided with a plurality of air supplementing holes 12 for air to pass through. The air supplementing holes 12 are round, the aperture is 28-38mm according to the power setting, and the number is 6-12.
After the burner is connected with the hearth of the boiler, the fuel gas forms a direct-current fuel gas flow in the fuel gas pipe 2 and is radially outwards diffused and sprayed to an axial outlet through the split pipes 13 which are annularly arranged; the air forms a direct-current air flow between the combustion cylinder 1 and the gas pipe 2 to be sprayed forwards, the pressure is increased through the air guide channel with a tapered section, the air flow forms a negative pressure area in the vicinity of one end of the backflow hole 6 and the inward retraction of the shielding cylinder 9, so that under the action of the pressure difference between the inside and the outside, high-temperature flue gas formed by the combustion at the front axial outlet is reversely sucked, automatically circulated into the combustion cylinder 1 through the backflow hole 6 and mixed with the air, and continuously conveyed to the combustion area along the air guide channel for secondary combustion. Meanwhile, air is axially injected to the axial outlet from the air supplementing holes 12 on the air guide disc 7, so that air required by combustion is better supplemented for the combustion center area, the air-fuel ratio is optimized, the combustion is promoted to be more sufficient, the combustion efficiency is improved, the power of the combustion-supporting fan is not lost, and the purpose of saving energy is achieved.
The structure is based on the internal recycle of the gas furnace, achieves the aim of fully low-nitrogen combustion by mixing a proper amount of high-temperature smoke in combustion air, and the action mechanism of the structure is mainly divided into the following aspects.
Firstly, residual underburned fuel gas and combustible gas (CO and NOx) in the flue gas generated in the combustion process are sent into a combustion zone again for secondary combustion, so that the full utilization of the combustible gas is realized, the energy is saved, the production cost of equipment is reduced, and the practicability of the equipment is improved.
Secondly, the air is preheated by means of the heat of the high-temperature flue gas, so that the subsequent combustion reaction is more sufficient, the heat utilization rate is fully exerted, the heat is further utilized, the heat loss is reduced, and the energy is saved and the consumption is reduced.
Thirdly, the flue gas is flushed into combustion air to dilute the nitrogen and oxygen concentration in the combustion air, so that the temperature peak value of a flame area is effectively reduced, the formation of thermal NOx is controlled, and the aim of low-nitrogen combustion is fulfilled. Compared with the traditional structure, the structure does not need to purchase circulating flue gas equipment and arrange circulating pipelines in addition, and the equipment cost is effectively reduced under the effect of ensuring full combustion.
Through combustion test, the embodiment burns under 1480kW condition, the flames are blue and uniformly distributed, the combustion state is very stable under the working conditions of 2.1% of oxygen content and 30-100% of load, CO in discharged flue gas is 0ppm, NOx is 13ppm, and the low-nitrogen standard is achieved.
The specific embodiments described herein are merely illustrative of the principles and functions of the present invention, and are not meant to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.
Claims (10)
1. The utility model provides an adjustable self-loopa low nitrogen gas burner of flue gas in stove, includes the combustion cylinder, the combustion cylinder has axial air inlet, radial gas inlet and axial export, coaxial gas pipe that links to each other with radial gas inlet that is equipped with in the combustion cylinder, axial exit is equipped with ignition and steady flame board, its characterized in that: the combustion cylinder comprises a first cylinder body and a second cylinder body which are sequentially connected along the axial conveying direction of gas, a plurality of internal and external through backflow holes are formed in the circumferential wall of the second cylinder body, and a smoke backflow amount adjusting structure for adjusting the size of the backflow holes is correspondingly arranged in the combustion cylinder; the gas pipe is provided with a gas guide disc coaxially sleeved at a position close to the reflow hole, the gas guide disc extends towards the gas axial output direction to form a hollow round platform peripheral wall with an opening gradually increased, a gas guide channel is formed between the round platform peripheral wall and the inner wall of the second cylinder, and the cross section size of the gas guide channel is gradually reduced along the gas axial output direction.
2. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1, wherein: the smoke reflux quantity adjusting structure comprises an axially-through shielding cylinder, a plurality of axially-extending adjusting rods are arranged on the circumferential edge of one end ring of the shielding cylinder, axially-extending sliding grooves are correspondingly formed in the first cylinder, the adjusting rods are matched with the sliding grooves to be connected in a sliding mode and can be fixed through screws, the other end of the shielding cylinder is inwards retracted, and therefore the shielding cylinder can axially slidably shield the reflux holes.
3. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1, wherein: the backflow holes are uniformly distributed on the same dividing circle of the circumferential wall of the second cylinder body.
4. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1, wherein: the backflow hole is in a long strip shape with semicircular two ends.
5. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1 or 2 or 3 or 4, wherein: the axial distance between the reflux hole and the ignition device is 20-80mm.
6. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1, wherein: the inclination angle of the generatrix of the circumferential wall of the circular truncated cone relative to the central axis of the air guide disc is 22-25 degrees.
7. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1 or 6, wherein: the axial length of the round platform peripheral wall is 60mm.
8. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1, wherein: the air guide disc is provided with a plurality of air supplementing holes for air to pass through.
9. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 8, wherein: the air supplementing holes are round, the aperture of the air supplementing holes is 28-38mm, and the number of the air supplementing holes is 6-12.
10. The furnace flue gas adjustable self-circulating low nitrogen gas burner of claim 1, wherein: the gas pipe evenly extends a plurality of horizontal L shunt tubes around the circumference wall, all is equipped with radial inward gas internal outlet and radial outward gas external outlet on every shunt tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476969.4A CN108730978B (en) | 2018-05-18 | 2018-05-18 | Self-circulation low-nitrogen gas burner with adjustable flue gas in furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810476969.4A CN108730978B (en) | 2018-05-18 | 2018-05-18 | Self-circulation low-nitrogen gas burner with adjustable flue gas in furnace |
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| CN108730978A CN108730978A (en) | 2018-11-02 |
| CN108730978B true CN108730978B (en) | 2023-11-17 |
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| CN109882841B (en) * | 2019-03-04 | 2020-07-17 | 中国科学院过程工程研究所 | Decoupling gas burner |
| CN110848684A (en) * | 2019-12-09 | 2020-02-28 | 重庆炅启热能科技有限公司 | Ultralow-nitrogen gas burner for rotary dynamic heating kiln and heating method |
| CN111442267A (en) * | 2020-05-13 | 2020-07-24 | 广东省特种设备检测研究院顺德检测院 | Low-nitrogen energy-saving gas boiler |
| CN111895410B (en) * | 2020-06-29 | 2022-02-01 | 欧保(中国)环境工程股份有限公司 | Vector control gas low-nitrogen burner |
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| CN106969380A (en) * | 2017-03-22 | 2017-07-21 | 同济大学 | A kind of low-nitrogen discharged combustion chamber and the gas turbine containing the combustion chamber |
| CN107606613A (en) * | 2017-09-27 | 2018-01-19 | 西安交通大学 | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification |
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