CN105114951B - The low nitrogen oxygen gas burner of the double classifications of trailing edge reflux - Google Patents
The low nitrogen oxygen gas burner of the double classifications of trailing edge reflux Download PDFInfo
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- CN105114951B CN105114951B CN201510520158.6A CN201510520158A CN105114951B CN 105114951 B CN105114951 B CN 105114951B CN 201510520158 A CN201510520158 A CN 201510520158A CN 105114951 B CN105114951 B CN 105114951B
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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
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- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
A kind of low nitrogen oxygen gas burner of double classifications of trailing edge reflux of present invention offer, it includes bellow assemblies, and smoke backflow fin circle is housed in bellow assemblies upper end；Center fuel burner nozzle is equipped in center wind duct in bellow assemblies, fuel burner nozzle is mounted with rotational-flow stable-flame device at center；It is mounted with coaxial tune air duct on bellow assemblies top, there is coaxial cold wind cylinder in center gas nozzle lower end；Bellow assemblies lower part is equipped with combustion air distribution drum；It is equipped with fuel gas inlet at bellow assemblies bottom centre, the combustion-supporting wind inlet of room temperature is equipped in fuel gas inlet both sides, high temperature combustion supporting air import is equipped in side.At the same conditions, using structure of the invention in CO emission compliances, NOx reduces by 65% or more than normal burner.In 270 DEG C of combustion-supporting air temperature, NOx emission can be by 400mg/Nm3Drop to average out to 138mg/Nm3。
Description
Technical field
The invention belongs to technical field of burner more particularly to combustion air to be classified low nitrogen for a kind of trailing edge reflux pair of high temperature
Oxygen gas burner.
Background technology
Low nitrogen oxygen gas burner is a kind of burner occurred to reduce discharged nitrous oxides in combustion product, often
The burner of rule heating furnace improve the thermal efficiency transformation after often with combustion air temperature improve and discharged nitrous oxides be more than state
Family's environment protection emission requirement.
Conventional gas burner uniformly divides to ensure that abundant after-flame mostly uses greatly combustion air with fuel gas in the design
The design method of cloth conflagration, and low nitrogen oxygen gas burner is then to be avoided while flame temperature to be reduced in the design
There is local high temperature zone, be burning that combustion process is delayed as possible while ensureing after-flame, low nitrogen oxygen burner occurs point
Multiple low nitrogen oxygen combustion technologies such as grade burning, smoke backflow, bias combustion.
Current common low nitrogen oxygen burner is under relatively low combustion-supporting air temperature (≤180 DEG C) operating mode and fire box temperature is relatively low
It is easier to realize low-nitrogen oxide discharging under the operating mode of (≤800 DEG C), but in high temperature combustion supporting air (>=250 DEG C) and blast furnace hearth
In the case of temperature (>=800 DEG C), even if discharged nitrous oxides significantly improve, it is difficult to reach national environmental protection emission request.
Invention content
The purpose of the present invention is to provide one kind under high temperature combustion supporting air, realizes that the trailing edge reflux of nitrogen oxides low emission is double
It is classified low nitrogen oxygen gas burner.
Realize the technical solution of the object of the invention：A kind of trailing edge reflux is double to be classified low nitrogen oxygen gas burner, it includes wind
Box assembly is equipped with smoke backflow fin circle in bellow assemblies upper end；Center is equipped in center wind duct in bellow assemblies to fire
Gas burner, at center, fuel burner nozzle is mounted with rotational-flow stable-flame device；Coaxial tune air duct is mounted on bellow assemblies top, at center
There is coaxial cold wind cylinder in gas nozzle lower end；Bellow assemblies lower part is equipped with combustion air distribution drum；At bellow assemblies bottom centre
Equipped with fuel gas inlet, it is equipped with the combustion-supporting wind inlet of room temperature in fuel gas inlet both sides, high temperature combustion supporting air import is equipped in side.
A kind of low nitrogen oxygen gas burner of as described above double classifications of trailing edge reflux, described in smoke backflow fin circle exist
A circle uniformly opens multiple smoke backflow circle fins on its steel cylinder；The smoke backflow circle fin shape be triangle, it is rectangular, half
Round, parabola or half elliptic；Smoke backflow circle fin and combustion air angle are 20-50 °, and form return port.
A kind of low nitrogen oxygen gas burner of as described above double classifications of trailing edge reflux, described in smoke backflow circle fin and
Return port is higher than furnace bottom upper surface.
A kind of trailing edge reflux as described above is double to be classified low nitrogen oxygen gas burner, and part of it combustion air is in the form of room temperature
Enter cold wind cylinder from the combustion-supporting wind inlet of room temperature；Remaining combustion air is entered with 150-350 DEG C of high temperature form from high temperature combustion supporting air import；
Whole fuel gas enter from fuel gas inlet.
A kind of trailing edge reflux as described above is double to be classified low nitrogen oxygen gas burner, and grid are designed in combustion air distribution drum
Plate is porous to ensure the uniform of centre wind.
Effect of the invention is that：
Combustion air is divided into high temperature and often by the low nitrogen oxygen gas burner of the double classifications of trailing edge of the present invention reflux, burner
Warm two-stage is sent into, and is being adjusted in air duct, and part high temperature combustion supporting air and the mixing of room temperature combustion air form eddy flow by rotational-flow stable-flame device
Afterwards, burning is mutually blended with the combustion gas of center gas nozzle.It is relatively low due to mixing combustion-supporting air temperature, while deficiency in draught so that
Flame of centre temperature is substantially reduced.To which temperature classification reduces the generation of heating power NOx.
Remaining combustion air is formed blunt after toning air duct high speed flows through smoke backflow fin circle after smoke backflow circle fin
Body negative pressuren zone sucks burner hearth flue gas from return port, and peripheral wind facies mutually blends, and reduces the oxygen amount of combustion air.Pass through one in this way
The fuel of secondary wind remaining after combustion continues to be mixed and burned with the combustion air for having blended flue gas, and flame temperature is significantly lower than theoretical fire
Flame temperature.Burning velocity obviously slows down simultaneously, and flame combustion process is suitably spun out, can be under the action of Calculating Radiation Heat Transfer In Furnaces
One step reduces flame temperature, achievees the purpose that reduce NOx productions by reducing flame peak temperature.Due to burner hearth smoke backflow amount
It is directly proportional to wind velocity, therefore burner hearth smoke backflow amount adjusts the conically shaped angle of air duct lower end to adjust by adjusting.
It is uniform after 90 degree of combustion-supporting shift of wind in order to ensure, it is more to be designed with combustion air distribution drum screen in combustion air distribution drum
Hole ensure centre wind it is uniform, burn subsequently into burner hearth, it is ensured that combustion air it is uniform, so as to avoid common in burning
Flame drifting unsteady phenomena.
At the same conditions, using the burner of this structure in CO emission compliances, NOx is reduced than normal burner
65% or more.It is monitored according to Shanghai Environmental monitoring center, in 270 DEG C of combustion-supporting air temperature, NOx emission can be by 400mg/Nm3Drop
To average out to 138mg/Nm3。
Description of the drawings
Fig. 1 is a kind of low nitrogen oxygen gas burner structure figure of double classifications of trailing edge reflux of the present invention；
Fig. 2 is smoke backflow fin coil structures schematic diagram；
Fig. 3 is combustion air distribution drum structural schematic diagram；
In figure：1. smoke backflow fin circle；2. adjusting air duct；3. center gas nozzle；4. rotational-flow stable-flame device；5. furnace bottom upper end
Face；6. cold wind cylinder；7. bellow assemblies；8. combustion air distribution drum；9. the combustion-supporting wind inlet of room temperature；10. blanking cover；11. fuel gas inlet；
12. high temperature combustion supporting air import；13. smoke backflow circle fin；14. return port；15. screen is porous.
Specific implementation mode
It is double to a kind of trailing edge reflux of the present invention in the following with reference to the drawings and specific embodiments to be classified low nitrogen oxygen gas combustion
Burner is further described.
As shown in Figure 1, a kind of trailing edge reflux of the present invention is double to be classified low nitrogen oxygen gas burner comprising bellows group
Part 7 is equipped with smoke backflow fin circle 1 in 7 upper end of bellow assemblies；Center is equipped in center wind duct in bellow assemblies 7 to fire
Gas burner 3, at center, fuel burner nozzle 3 is mounted with rotational-flow stable-flame device 4；Coaxial tune air duct 2 is mounted on 7 top of bellow assemblies,
At center, there is coaxial cold wind cylinder 6 in 3 lower end of gas nozzle；7 lower part of bellow assemblies is equipped with combustion air distribution drum 8；In bellow assemblies 7
It is equipped with fuel gas inlet 11 at bottom centre, is equipped with the combustion-supporting wind inlet 9 of room temperature in 11 both sides of fuel gas inlet, is helped equipped with high temperature in side
Fire wind inlet 12.A part of combustion air enters cold wind cylinder 6 in the form of room temperature from the combustion-supporting wind inlet 9 of room temperature；Remaining combustion air with
150-350 DEG C of high temperature form enters from high temperature combustion supporting air import 12；Whole fuel gas enter from fuel gas inlet 11.
As shown in Fig. 2, the circle on its steel cylinder of smoke backflow fin circle 1 uniformly opens multiple smoke backflow circle fins 13；Institute
13 shape of smoke backflow circle fin stated is triangle, rectangular, semicircle, parabola or half elliptic；Smoke backflow circle fin
13 and combustion air angle are 20-50 °, and form return port 14.Wherein, smoke backflow circle fin 13 and return port 14 are higher than stove
Bottom upper surface 5.
As shown in figure 3, being designed with screen porous 15 in combustion air distribution drum 8 ensures the uniform of centre wind.
A small amount of room temperature combustion air enters from the combustion-supporting wind inlet 9 of room temperature in the present invention；Whole fuel gas from fuel gas inlet 10 into
Enter.It is adjusting in air duct 2, a small amount of high temperature combustion supporting air and the mixing of room temperature combustion air are after rotational-flow stable-flame device 4 forms eddy flow, with center
The combustion gas that gas nozzle 3 sprays mutually blends burning.Since combustion air deficiency fuel gas is superfluous, combustion flame is incomplete at this time
Burning, flame temperature can be significantly lower than theoretical flame temperature.To mix combustion-supporting air temperature relatively low simultaneously so that flame of centre temperature into
One step reduces.To which temperature classification reduces the generation of heating power NOx.Remaining combustion air flows through smoke backflow wing through toning air duct high speed
After piece circle 1, bluff body negative pressuren zone is formed after smoke backflow circle fin 13, burner hearth flue gas is sucked from return port, and peripheral wind facies
Mutually blending, reduces the oxygen amount of combustion air.The fuel for passing through First air remaining after combustion in this way, with blended the combustion air of flue gas after
Continuous to be mixed and burned, flame temperature is significantly lower than theoretical flame temperature.Burning velocity obviously slows down simultaneously, and flame combustion process is appropriate
It spins out, flame temperature can be further decreased under the action of Calculating Radiation Heat Transfer In Furnaces, reach drop by reducing flame peak temperature
The purpose of low NOx productions.Since burner hearth smoke backflow amount is directly proportional to wind velocity, burner hearth smoke backflow amount is adjusted by adjusting
The conically shaped angle of 6 lower end of air duct adjusts.
Burner is uniform after 90 degree of combustion-supporting shift of wind in order to ensure, combustion air distribution is designed in combustion air distribution drum 8
Cylinder screen it is porous 15 ensure centre wind it is uniform, it is ensured that combustion air it is uniform.
Claims (3)
1. a kind of trailing edge reflux is double to be classified low nitrogen oxygen gas burner, it is characterised in that：It includes bellow assemblies (7), in bellows
Component (7) upper end is equipped with smoke backflow fin circle (1)；Center combustion gas is equipped in center wind duct in bellow assemblies (7) to burn
Mouth (3), at center, fuel burner nozzle (3) is mounted with rotational-flow stable-flame device (4)；It is mounted with coaxial tune wind on bellow assemblies (7) top
Cylinder (2), at center, there is coaxial cold wind cylinder (6) in gas nozzle (3) lower end；Bellow assemblies (7) lower part is equipped with combustion air distribution drum
(8)；It is equipped with fuel gas inlet (11) at bellow assemblies (7) bottom centre, room temperature combustion air is equipped in fuel gas inlet (11) both sides
Import (9) is equipped with high temperature combustion supporting air import (12) in side；
The smoke backflow fin circle (1) circle on its steel cylinder uniformly opens multiple smoke backflow circle fins (13)；Described
Smoke backflow circle fin (13) shape is triangle, rectangular, semicircle, parabola or half elliptic；Smoke backflow circle fin
(13) it is 20-50 ° with combustion air angle, and forms return port (14)；
The smoke backflow circle fin (13) and return port (14) is higher than furnace bottom upper surface (5).
2. a kind of trailing edge reflux according to claim 1 is double to be classified low nitrogen oxygen gas burner, it is characterised in that：A part
Combustion air enters cold wind cylinder (6) in the form of room temperature from the combustion-supporting wind inlet of room temperature (9)；Remaining combustion air is with 150-350 DEG C of high temperature shape
Formula enters from high temperature combustion supporting air import (12)；Whole fuel gas enter from fuel gas inlet (11).
3. a kind of trailing edge reflux according to claim 1 is double to be classified low nitrogen oxygen gas burner, it is characterised in that：Combustion-supporting
Wind distribution drum (8) is designed with screen porous (15) and ensures the uniform of centre wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520158.6A CN105114951B (en) | 2015-08-21 | 2015-08-21 | The low nitrogen oxygen gas burner of the double classifications of trailing edge reflux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520158.6A CN105114951B (en) | 2015-08-21 | 2015-08-21 | The low nitrogen oxygen gas burner of the double classifications of trailing edge reflux |
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| CN105114951A CN105114951A (en) | 2015-12-02 |
| CN105114951B true CN105114951B (en) | 2018-07-27 |
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| CN201510520158.6A Active CN105114951B (en) | 2015-08-21 | 2015-08-21 | The low nitrogen oxygen gas burner of the double classifications of trailing edge reflux |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546532A (en) * | 2016-01-11 | 2016-05-04 | 安德森热能科技（苏州）有限责任公司 | Ultra-low-emission burner |
| CN105698174B (en) * | 2016-04-11 | 2018-07-17 | 徐州科融环境资源股份有限公司 | A kind of combustion gas low NO |
| US10584051B2 (en) * | 2017-02-22 | 2020-03-10 | Air Products And Chemicals, Inc. | Double-staged oxy-fuel burner |
| CN110360553B (en) * | 2018-04-09 | 2024-06-25 | 江苏弗雷姆环境科技有限公司 | Industrial gas and smoke self-circulation ultralow nitrogen burner |
| CN108730978B (en) * | 2018-05-18 | 2023-11-17 | 浙江炬烁热能设备制造有限公司 | Self-circulation low-nitrogen gas burner with adjustable flue gas in furnace |
| CN113357931A (en) * | 2021-05-17 | 2021-09-07 | 北京科技大学 | Low NOx combustion device of gas flame furnace with smoke self-suck back function |
| CN114151790B (en) * | 2021-12-01 | 2023-06-30 | 北京航天石化技术装备工程有限公司 | Distributed type flue gas internal and external double-circulation coupling staged combustion device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476726B (en) * | 2009-01-14 | 2011-02-16 | 河北工业大学 | High-temperature low-oxygen combustor |
| CN201680364U (en) * | 2010-04-06 | 2010-12-22 | 山西蓝天环保设备有限公司 | Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers |
| CN202012913U (en) * | 2010-12-20 | 2011-10-19 | 洛阳瑞昌石油化工设备有限公司 | Novel flue gas self-reflux low-oxygen combustor |
| CN103277795B (en) * | 2013-05-27 | 2015-05-20 | 中国科学院广州能源研究所 | Gas burner capable of adjusting gas to be self-recycling |
| CN205002113U (en) * | 2015-08-21 | 2016-01-27 | 北京航天动力研究所 | Two low nitrogen oxygen gas combustion wares in grades of trailing edge backward flow |
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Effective date of registration: 20161201 Address after: 100076 Beijing, Fengtai District, South Road, No. 1, Applicant after: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corporation Address before: 100076 Beijing, Fengtai District, South Road, No. 1, Applicant before: Beijing Inst. of Aerospace Dynamics |
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