CN108302536B - Low NO - Google Patents
Low NO Download PDFInfo
- Publication number
- CN108302536B CN108302536B CN201810012329.8A CN201810012329A CN108302536B CN 108302536 B CN108302536 B CN 108302536B CN 201810012329 A CN201810012329 A CN 201810012329A CN 108302536 B CN108302536 B CN 108302536B
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- CN
- China
- Prior art keywords
- runner
- air
- combustion gas
- compression
- mixed flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
-
- 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
- F23D14/66—Preheating the combustion air or gas
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
-
- 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 present invention relates to technical field of burner, and in particular to a kind of low NO, comprising: shell, shell end are provided with air baffle, and enclosure interior is provided with the airtight cavity for air circulation, and the air intake of airtight cavity is set on air baffle；Mixed flow cylinder, mixed flow cylinder are set in airtight cavity, are internally provided with combustion gas runner, and several compression runners flowed into combustion gas stream road for air in airtight cavity are provided on mixed flow cylinder lateral wall；Wherein, several compression runners circumferentially circularize distribution around mixed flow cylinder, and gas circulation direction is provided at least two circles, and compression flow channel length extends along gas circulation direction.Technical solution in the present invention, by being preheated by the indoor heat that burns to air in air with before combustion gas mixing, to increase the intracorporal temperature distribution evenness of mixed flow cylinder after combustion gas is ignited while reducing and burning room temperature, to inhibit the generation of nitrogen oxides.
Description
Technical field
The present invention relates to technical field of burner, and in particular to a kind of low NO.
Background technique
Burner is to provide the device of thermal energy to heating furnace, and fuel gas is ejected into furnace by burner nozzle to be made in furnace
Temperature reaches technique requirement.The fuel element air supply line nozzle of existing burner is arranged in parallel or is being fired with gas pipeline nozzle
Burn head in communicate, combustion gas from spray head spray, while air pass through rotation structure formation cyclone, combustion gas nozzle spray after with cyclone
Use is lighted after mixing, major defect existing for this hybrid mode is the combustion gas due to mixing air in cylinder by point
Combustion is uniformly mixed insufficient for combustion gas and air, exists so as to cause combustion gas so that combustion gas is shorter from the time lighted is ejected into
After being ignited in cylinder, temperature distribution is non-uniform in cylinder, the part nitrogen when local temperature is higher than 800 DEG C, in air
It can be converted into nitrogen oxides, to pollute the environment.
In view of current the problems of burner, the designer is based on being engaged in such product engineering using abundant for many years
Practical experience and professional knowledge, and cooperate the utilization of scientific principle, be subject to research and innovation, actively to found a kind of low nitrogen burning
Device makes it with more practicability.
Summary of the invention
The present invention proposes a kind of low NO, before air and combustion gas mixing by burn indoor heat to air into
Row preheating, to increase the intracorporal uniformity of temperature profile of mixed flow cylinder after combustion gas is ignited while reducing and burning room temperature
Property, to inhibit the generation of nitrogen oxides.
The present invention the technical solution to solve the technical problem is that:
Low NO, comprising:
Shell, the shell end are provided with air baffle, and the enclosure interior is provided with the closed chamber for air circulation
Body, the air intake of the airtight cavity are set on the air baffle；
Mixed flow cylinder, the mixed flow cylinder are set in the airtight cavity, are internally provided with combustion gas runner, and described
Several compression runners flowed into the combustion gas runner for air in the airtight cavity are provided on mixed flow cylinder lateral wall；
Wherein, several compression runners circumferentially circularize distribution around the mixed flow cylinder, and along the gas circulation
Direction is provided at least two circles, and the compression flow channel length extends along gas circulation direction.
Further, the side wall of the mixed flow cylinder is solid construction.
Further, the mixed flow cylinder is provided with several, and circlewise uniform along the Internal and external cycle of the air baffle
Distribution.
Further, development length of the compression runner on gas circulation direction is straight not less than the combustion gas runner
Diameter.
Further, in compression runner described in two adjacent rings, on gas circulation direction, the outlet position of stream compression runner
In the downstream of downstream compressor flow channel entry point.
Further, the compression runner is in the direction upper section extended from the airtight cavity into the combustion gas runner
Area is gradually reduced.
Further, on gas circulation direction, the cross-sectional constriction of the combustion gas runner of different height is than different.
Further, on gas circulation direction, it is greater than positioned at the cross-sectional constriction ratio of the combustion gas runner in downstream and is located at
The cross-sectional constriction ratio of the combustion gas runner of upstream.
Further, the mixed flow barrel end is provided with flange arrangement, for connecting with the air baffle.
Further, sealing structure is provided between the flange arrangement and the air baffle.
Further, the compression runner occurs relative to the axis direction of the combustion gas runner inclined in their extension direction
It moves to form turbulent structure.
Further, it is located in the combustion gas runner inner wall on the downstream position of any one circle compression runner exit
It is provided with protruding portion.
Further, the limit prominent position of the protruding portion is connect by two arc surfaces with the combustion gas runner inner wall.
Further, valve is provided on the air baffle, the valve is used to adjust the maximum of the airtight cavity
Pressure value.
Further, the air intake is provided with several, and circlewise uniform along the Internal and external cycle of the air baffle
Distribution, and several air intakes pass through cyclic annular compression ring connection, are provided with air main entrance on the ring-type compression ring.
Further, agitating device is provided in the airtight cavity.
Technical solution in through the invention can reach following technical effect:
Low NO in the present invention is by the setting of airtight cavity, so that air is not direct and combustion gas mixing, but
Enter airtight cavity before mixing and gas progress heat exchange is burnt by mixed flow cylinder and combustion gas runner internal combustion, above-mentioned way is first is that drop
Temperature in low cylinder inner combustion chamber, second is that the intracorporal Temperature Distribution of cylinder can be made more uniform, to effectively avoid part in cylinder
Or the appearance of whole high temperature, wherein compression runner accelerates the progress of above-mentioned heat exchange along the setting that gas circulation direction extends,
So that the reaction temperature that nitrogen is converted into nitrogen oxides is unable to reach in cylinder, to inhibit the generation of nitrogen oxides, effectively
Reduce the pollution to environment.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the partial sectional view of low NO in the present invention；
Fig. 2 is the structural schematic diagram of mixed flow cylinder；
Fig. 3 is the cross-sectional view of mixed flow cylinder；
Fig. 4 is the top view of low NO in the present invention；
Fig. 5 is the structural schematic diagram of cyclic annular compression ring；
Appended drawing reference: shell 1, air baffle 2, airtight cavity 3, air intake 4, mixed flow cylinder 5, combustion gas runner 6, compression
Runner 7, flange arrangement 8, protruding portion 9, cyclic annular compression ring 10, air main entrance 11.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
Embodiment in the present invention is write using progressive mode.
As shown in Fig. 1 ~ 4, a kind of low NO is shown, comprising: shell 1,1 end of shell are provided with air baffle 2,
Shell 1 is internally provided with the airtight cavity 3 for air circulation, and the air intake 4 of airtight cavity 3 is set on air baffle 2；It is mixed
Flow cartridge body 5, mixed flow cylinder 5 are set in airtight cavity 3, are internally provided with combustion gas runner 6, and set on 5 side wall of mixed flow cylinder
It is equipped with several compression runners 7 flowed into combustion gas stream road 6 for air in airtight cavity 3；Wherein, several compression runners 7 are around mixed
Flow cartridge body 5 is circumferential to circularize distribution, and gas circulation direction is provided at least two circles, compresses 7 length of runner along gas circulation
Direction extends.
The working principle of low NO is as follows in above-described embodiment: entering the air in airtight cavity 3 from air intake 4
It stops, is exchanged by 5 outer wall of mixed flow cylinder with progress heat in combustion chamber, so that burning Indoor Temperature in airtight cavity 3
Degree reduces, while air is preheated, preferably to realize burning, as air capacity increases in seal cavity 3, together
When generate negative pressure with the indoor burning of burning, air enters in combustion gas runner 6 through compression runner 7 and combustion gas mixing, and compression is flowed
All directions on 6 side wall of air spontaneous combustion flow channel are sent into combustion chamber by road 7, in all directions when entering combustion gas runner 6
It is mixed with combustion gas, when can effectively control air by the gas pressure in control airtight cavity 3 and enter in combustion gas runner 6
Flow velocity, to control mixed effect, it is emphasized that, along gas circulation direction be provided at least two circle, can be by firing
Air is sent into batches on gas circulating direction and realizes repeated combustion, and every exit by a circle pressure channel 7, then plays one
Secondary combustion-supporting effect so that burning it is more abundant, when avoiding because of lack of air surplus combustion gas be broken down into free carbon, nitrogen,
Carbon monoxide reduces combustion gas utilization rate, avoids generating a large amount of carbon monoxide pernicious gas and free carbon emission；And compression is flowed
7 length of road extends along gas circulation direction, pre-heat effect of the air before entering combustion gas runner 6 can be further increased, so that hot
Amount is uniform, to reach better combustion efficiency；In order to guarantee the effect of heat exchange, the side wall of mixed flow cylinder 5 is preferably selected reality
Mixed flow cylinder 5 can also be divided and be processed for outer barrel and inner cylinder by core structure, but in order to reduce by 5 processing cost of mixed flow cylinder, and
The both ends for compressing runner 7 are respectively welded in the connection of outer barrel and inner cylinder above-mentioned realization seal cavity 3 and combustion gas runner 6；
In order to guarantee the using effect of low NO, mixed flow cylinder 8 is provided with several, and along the Internal and external cycle of air baffle 2 cyclization
Shape is uniformly distributed.
As the preferred of above-described embodiment, compress development length of the runner 7 on gas circulation direction and be not less than combustion gas stream
The diameter in road 6, theoretically for, compress runner 7 length it is longer, preheating of air effect is better, however, to ensure that burning
The overall dimensions of device, the length for compressing runner 7 is unsuitable too long, and 2 times no more than 6 diameter of combustion gas runner are preferred.
The preferred embodiment of air preheat effect can be increased under the premise of guaranteeing burner overall dimensions as another,
Two adjacent rings compress runner 7 in, on gas circulation direction, upstream compression runner 7 outlet be located at downstream compressor runner 7
The downstream of entrance, i.e. two adjacent rings compress runner 7 and there is the part being overlapped on gas circulation direction, this mode can improve one
Increase the effect of heat exchange, while reducing burner volume.
As the preferred of above-described embodiment, in order to increase speed when air is flowed out from compression runner 7, compression runner 7 exists
The direction upper section area extended from airtight cavity 3 into combustion gas runner 6 is gradually reduced, and in the case where flow is certain, passes through
The mode for reducing circulation area can effectively increase the speed of circulation, flame flow velocity can be improved in this way, to reduce nitrogen
Molecule residence time in the combustion chamber, to reduce the production quantity of oxynitrides.
As the preferred of above-described embodiment, on gas circulation direction, the cross-sectional constriction ratio of the combustion gas runner 6 of different height
Difference, because burning degree can gradually change on gas circulation direction, it is therefore desirable to pass through the change of cross-sectional constriction ratio
Change to adapt to the variation of above-mentioned burning degree, wherein the cross-sectional constriction positioned at the combustion gas runner 6 in downstream is located at upstream than being greater than
The cross-sectional constriction ratio of combustion gas runner 6.
As the preferred of above-described embodiment, 5 end of mixed flow cylinder is provided with flange arrangement 8, for connecting with air baffle 2
It connects, the setting of flange arrangement 8, so that the installation and removal of mixed flow cylinder 5 are more easier；Wherein, flange arrangement 8 and air baffle
It is provided with sealing structure between 2, avoids the leakage of gas.
As the preferred of above-described embodiment, the axis direction relative to combustion gas runner 7 in their extension direction of runner 7 is compressed
It shifts to form turbulent structure, by the compression offset setting of runner 7, may make that the gas flowed out from compression runner 7 can phase
It shifting for the direction of gas circulation, multiply air can then form circinate air after deviating in the same direction, thus
So that air and combustion gas preferably mix.
It is located at the downstream bits that any one circle compression runner 7 exports as the preferred of above-described embodiment, on 6 inner wall of combustion gas runner
It sets and is provided with protruding portion 9, the setting of protruding portion 9 can increase the mixing of air and combustion gas by way of spreading and shrinking
Effect, wherein the limit prominent position of protruding portion 9 is connect by two arc surfaces with 6 inner wall of combustion gas runner, and gentle transition makes
The circulation of gas keeps clear.
As the preferred of above-described embodiment, valve is provided on air baffle 2, valve is for adjusting airtight cavity 3 most
Big pressure value can be led to by the way that the pressure release value of valve is adjusted to specified value when the air pressure in airtight cavity 3 reaches the limit values
The mode for crossing pressure release guarantees safety；Also pressure sensor can be set in airtight cavity 3, by the feedback of pressure sensor come
Pressure value in airtight cavity 3 is adjusted, can control the proportion of air and combustion gas in this way, so that combustion gas and air
Optimum proportioning between 1 ~ 1.1, so both can avoid because of lack of air when surplus combustion gas be broken down into free carbon, nitrogen, one
Carbonoxide, but avoidable additional air can take away heat and generate excessive oxynitride discharge, cause heat waste
It loses.
As the preferred of above-described embodiment, as shown in figure 5, air intake 4 is provided with several, and along air baffle 2
Internal and external cycle is circlewise uniformly distributed, and several air intakes 4 pass through 10 connection of cyclic annular compression ring, are provided with air on cyclic annular compression ring 10
Main entrance 10 may make the air of room temperature to enter by all directions of mixed flow cylinder 5 in this way, guarantee the equal of heat exchange
Even property, because temperature throughout the room of burning has difference, after heat exchange, the temperature in airtight cavity 3 everywhere is also had
Difference, therefore agitating device can be provided in airtight cavity 3, realize the agitation to air on gas circulating direction.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (6)
1. low NO characterized by comprising
Shell (1), shell (1) end are provided with air baffle (2), and the shell (1) is internally provided with for air circulation
Airtight cavity (3), the air intake (4) of the airtight cavity (3) is set on the air baffle (2)；
Mixed flow cylinder (5), the mixed flow cylinder (5) are set in the airtight cavity (3), are internally provided with combustion gas runner
(6), it and on the mixed flow cylinder (5) side wall is provided with and is flowed into the combustion gas runner (6) for the airtight cavity (3) interior air
Several compression runners (7)；
Wherein, several compression runners (7) circumferentially circularize distribution around the mixed flow cylinder (5), and along the combustion gas stream
Logical direction is provided at least two circles, and compression runner (7) length extends along gas circulation direction；
In compression runner (7) described in two adjacent rings, on gas circulation direction, the outlet of stream compression runner (7) is located at downstream
Compress the downstream of runner (7) entrance；
The direction upper section area that compression runner (7) extends in from the airtight cavity (3) to the combustion gas runner (6)
It is gradually reduced；
On gas circulation direction, the cross-sectional constriction of the combustion gas runner (6) of different height is than different；
The air intake (4) is provided with several, and is circlewise uniformly distributed along the Internal and external cycle of the air baffle (2), and
Several air intakes (4) pass through cyclic annular compression ring (10) connection, are provided with air main entrance on the ring-type compression ring (10)
(11).
2. low NO according to claim 1, which is characterized in that the compression runner (7) is in gas circulation direction
On development length be not less than the combustion gas runner (6) diameter.
3. low NO according to claim 1, which is characterized in that mixed flow cylinder (5) end is provided with flange
Structure (8), for being connect with the air baffle (2).
4. low NO according to claim 1, which is characterized in that the compression runner (7) is in their extension direction
Axis direction relative to the combustion gas runner (6) shifts to form turbulent structure.
5. low NO according to claim 1, which is characterized in that be located on combustion gas runner (6) inner wall any
Protruding portion (9) are provided on the downstream position of one circle compression runner (7) outlet.
6. low NO according to claim 1, which is characterized in that be provided with agitation dress in the airtight cavity (3)
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810012329.8A CN108302536B (en) | 2018-01-05 | 2018-01-05 | Low NO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810012329.8A CN108302536B (en) | 2018-01-05 | 2018-01-05 | Low NO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108302536A CN108302536A (en) | 2018-07-20 |
| CN108302536B true CN108302536B (en) | 2018-12-28 |
Family
ID=62868638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810012329.8A Active CN108302536B (en) | 2018-01-05 | 2018-01-05 | Low NO |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108302536B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682792A (en) * | 2019-10-17 | 2021-04-20 | 芜湖美的厨卫电器制造有限公司 | Combustor and gas water heater |
| CN116447522B (en) * | 2023-06-12 | 2023-09-19 | 河北燕山钢铁集团有限公司 | Wet-type oxyhydrogen mixing adjusting device and working method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101118A (en) * | 2007-07-26 | 2008-01-09 | 中南大学 | Low oxygen dispersion burner |
| CN201662079U (en) * | 2010-02-04 | 2010-12-01 | 杨成 | Combustor in firewood-saving and coal-saving stove |
| CN203068521U (en) * | 2013-01-18 | 2013-07-17 | 福建三能节能科技有限责任公司 | Inductive air drafting type burner |
| CN203703971U (en) * | 2014-02-11 | 2014-07-09 | 广州市东霸节能科技有限公司 | Air preheat burner installed rapidly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4239903C1 (en) * | 1992-11-27 | 1994-06-30 | Franz Kuenzli Ag Wangen | Injector mouthpiece for burner units |
-
2018
- 2018-01-05 CN CN201810012329.8A patent/CN108302536B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101118A (en) * | 2007-07-26 | 2008-01-09 | 中南大学 | Low oxygen dispersion burner |
| CN201662079U (en) * | 2010-02-04 | 2010-12-01 | 杨成 | Combustor in firewood-saving and coal-saving stove |
| CN203068521U (en) * | 2013-01-18 | 2013-07-17 | 福建三能节能科技有限责任公司 | Inductive air drafting type burner |
| CN203703971U (en) * | 2014-02-11 | 2014-07-09 | 广州市东霸节能科技有限公司 | Air preheat burner installed rapidly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108302536A (en) | 2018-07-20 |
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