CN107062226A - A kind of big backflow low NO of high-temperature flue gas - Google Patents
A kind of big backflow low NO of high-temperature flue gas Download PDFInfo
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- CN107062226A CN107062226A CN201710369010.6A CN201710369010A CN107062226A CN 107062226 A CN107062226 A CN 107062226A CN 201710369010 A CN201710369010 A CN 201710369010A CN 107062226 A CN107062226 A CN 107062226A
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- China
- Prior art keywords
- flue gas
- fuel nozzle
- flow channel
- temperature flue
- air flow
- Prior art date
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000003546 flue gas Substances 0.000 title claims abstract description 45
- 239000000446 fuel Substances 0.000 claims abstract description 87
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000001727 in vivo Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 230000003134 recirculating effect Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- -1 burner shell 2 Chemical compound 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing 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
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
-
- 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
A kind of big backflow low NO of high-temperature flue gas, it can be applicable to civilian and industrial furnace field, including burner shell, central cylinder is provided with the burner casing body, third level fuel nozzle ports, several fins radially distributed, second level fuel nozzle ports are distributed in the middle of several described fins, there are swirl vane and central cylinder air inlet in the rear portion of the central cylinder, there is inner sleeve the central cylinder front end, inner ring air flow channel is formed between the inner sleeve and the central cylinder, annular air cleft air flow channel is formed between outer sleeve and the inner sleeve, the front end of the annular air cleft air flow channel is provided with porous disc, the rear end of the annular air cleft air flow channel is the annular air cleft formed between the outer sleeve and the inner sleeve, outer shroud air flow channel is formed between the outer sleeve and the burner shell, there is first order fuel nozzle in the outer shroud air flow channel, first order fuel nozzle ports are towards the inwall of the burner shell.
Description
Technical field
The present invention relates to industrial gasses burner technology, such as low NO, more particularly to a kind of high-temperature flue gas
Big backflow low NO, the big backflow of high-temperature flue gas refers to that the combustion product gases i.e. high-temperature flue gas in burner hearth can circulate inflow
The recirculating zone in the stove that burner nozzle is formed, the low nitrogen is to refer to reduction nitrogen oxides i.e. NOX generation and discharge.
Background technology
With Chinese society and economic fast development, energy resource consumption also quickly increases, and DS NOx Est amount is also constantly increasing
Long, environmental problem is increasingly serious, it has also become threaten one of principal element of human kind sustainable development.In recent years, country is to discharge
The requirement of index is more and more stricter, thus further control nitrogen oxides (NOX) discharge to national economy and environmental protection can
Sustainable development is most important.NOX generation is divided into three classes, respectively thermal NO X, Quick-type NOX, fuel type NOX.Natural gas
In nitrogen content it is relatively low, therefore NOx main sources be thermal NO x and Quick-type NOx.When thermal NO X is burning in air
N2 and O2 generate at high temperature, when concentration when its major influence factors has reaction temperature, N2 and an O2 reactions and stop
Between, wherein the most key influence factor is reaction temperature.Quick-type NOx is that hydrocarbon group occurs in N2 and fuel in air
What series reaction was produced.
Low-NO_x combustion technology main at present has：The burning of low excess air coefficient, Researched of Air Staging Combustion Burning Pulverized Coal, fuel staging combustion
Burning, flue gas recirculation, flameless combustion, premixed combustion etc..Natural gas low-NO_x combustion technology mainly around reduction ignition temperature so that
Reduce thermal NO X generation development.The reduction of ignition temperature can by control combustion zone excess air coefficient come
Regulation, basic ideas are all burning is occurred under conditions of equivalent proportion is deviateed for 1, make burning in lean combustion or fuel-rich situation
It is lower to carry out, so as to avoid the occurrence of area of localized hyperthermia, reduce thermal NO X generation.The reduction of ignition temperature can also pass through cigarette
Gas is recycled for realization, and flue gas recirculation includes flue gas interior circulation and flue gas outer circulation.Flue gas interior circulation be by burner with
The special structure design of burner hearth, makes flue gas produce backflow inside burner hearth；Flue gas outer circulation is from a certain position of boiler by flue gas
It is re-introduced into by external pipe in burner hearth, participates in combustion reaction.The purpose for adding flue gas recirculation is for flue gas
Combustion product be added in combustion zone, reduce ignition temperature, while add flue gas can reduce combustion zone oxygen point
Pressure, so that weaken the thermal NO X processes that oxygen is generated with nitrogen, final reduction NOX discharge.
The inventors discovered that, current several low NO technologies all differ from one another, but each some problems.Example
Such as, the combustible loss that the burning of low excess air coefficient is caused is big, and boiler thermal output is low；Premixed combustion technology combustion instability, can
It can cause to be tempered or stop working；Flue gas recirculation can make decrease in oxygen partial pressure, and air velocity increase makes combustion instability, put out
The phenomenons such as fire, vibration.
The content of the invention
The present invention is for defect present in prior art or not enough there is provided a kind of big backflow low nitrogen burning of high-temperature flue gas
Device, the big backflow of high-temperature flue gas refers to that the combustion product gases i.e. high-temperature flue gas in burner hearth can circulate inflow by burner nozzle shape
Into stove in recirculating zone, the low nitrogen is to refer to reduction nitrogen oxides i.e. NOX generation and discharge.The present invention, which has, has burnt
Entirely, combustion stability is good, and the thermal efficiency is high, and the characteristics of discharge is few can be applicable to civilian and industrial furnace field.
Technical scheme is as follows：
A kind of big backflow low NO of high-temperature flue gas, it is characterised in that including burner shell, the burner shell
Rear end there is the connecting interface of connection air intake section, be provided with central cylinder, centered cylinder in the burner casing body
The centre of body front end is provided with third level fuel nozzle ports, and several that radially distribute are provided with along the centre
Fin, second level fuel nozzle ports are distributed in the middle of several described fins, by preceding on the rear portion outer peripheral face of the central cylinder
It is disposed with backward on swirl vane and central cylinder air inlet, the outer peripheral face of the central cylinder front end in being provided with
Sleeve, is formed between the inner sleeve and the central cylinder outside being provided with the outside of inner ring air flow channel, the inner sleeve
Sleeve, is formed between the outer sleeve and the inner sleeve before annular air cleft air flow channel, the annular air cleft air flow channel
End is provided with porous disc, and the rear end of the annular air cleft air flow channel is the ring formed between the outer sleeve and the inner sleeve
Shape air cleft, forms in outer shroud air flow channel, the outer shroud air flow channel between the outer sleeve and the burner shell and sets
There is a first order fuel nozzle, the first order fuel nozzle ports of the first order fuel nozzle are towards in the burner shell
Wall.
The first order fuel nozzle ports are located on the front end outer peripheral face of the first order fuel nozzle.
Housing forward end inwall blade is provided with the burner casing body.
The outer sleeve is tubaeform with the inner sleeve；Or, the outer sleeve to be tubaeform, the inner sleeve
Inwall is straight barrel type and outer wall is taper；The slit width of the annular air cleft passes through the axle between the outer sleeve and the inner sleeve
Adjusted to displacement, when the outer sleeve is moved along, the slit width narrows.
The number of several fins is 10~20.
The number of the swirl vane is 10~30, and swirl vane setting angle is 10~30 °.
The number of the first order fuel nozzle is 5~10.
The number of the second level fuel nozzle ports is 4~8.
The number of the third level fuel nozzle ports is 6~12.
The percent opening of the porous disc is 1~5%.
The setting angle of the housing forward end inwall blade is 10~30 °.
The fuel quantity that the first order fuel nozzle ports spray accounts for the 80~90% of total fuel quantity.
The fuel quantity that the second level fuel nozzle ports spray accounts for the 5~10% of total fuel quantity.
The fuel quantity that the third level fuel nozzle ports spray accounts for the 1~5% of total fuel quantity.
The technology of the present invention effect is as follows：The present invention is the low high-temperature flue gas of a kind of thermal efficiency height, flameholding, DS NOx Est
Big backflow low NO, can be while NOX generations be effectively reduced, surely using the big backflow of high-temperature flue gas and flue gas recirculation
Fixed to burn and burn completely, complete with burning, stability is good, efficiency high, the characteristics of discharging less, can be applicable to civilian and work
Industry stove field.
Compared with prior art, the big backflow low NO of high-temperature flue gas of the present invention is by three-level fuel and by adjusting
Section outer sleeve controls burner nozzle flow velocity in the position of axial direction, so that recirculating zone and high temperature gases recirculating amount in stove are controlled,
The purpose that combustion flame is layered is reached by air classification ratio simultaneously, the superposition of flame is effectively reduced, reduces flame temperature
Degree, so as to reach the purpose of control DS NOx Est.
The big backflow low NO of high-temperature flue gas of the present invention can be in freeze profile into special backflow vortex structure：From interior annular space
The air-flow of flow channel outflow is formed about two small backflows in the center close to burner nozzle to whirlpool, and this backflow whirlpool is not only
Play a part of stable burning, and smoke backflow reduces the temperature of recirculating zone to this recirculating zone interior energy, so as to reduce NOX lifes
Into；The air-flow flowed out from outer shroud air flow channel in freeze profile into big recirculating zone, the smoke backflow produced in burner hearth to this area
The formation in domain, effectively reduction thermal NO X.The present invention can coordinate with flue gas recirculating technique, in higher flue gas recirculation
It can stablize under rate and burn, and burning is complete, so that NOX generations are reduced into 30mg/Nm3, (Nm3 refers at 0 degree Celsius 1
The gas volume of normal atmosphere pressure；N represents standard conditions Nominal Condition, i.e. the condition of air is：One standard
Atmospheric pressure, temperature is 0 DEG C, and relative humidity is 0%) below, to reach the level of minimum discharge.
Brief description of the drawings
Fig. 1 is the structural representation for implementing a kind of big backflow low NO of high-temperature flue gas of the invention.
Fig. 2 is the central unit construction schematic diagram in Fig. 1.
Reference lists as follows：1- air intakes section；2- burner shells；3- central cylinders front end；4- fins；5-
First order fuel nozzle；6- porous discs；7- housing forward end inwall blades；8- inner sleeves；9- outer sleeves；10- third level fuel sprays
Mouthful；11- second level fuel nozzle ports；12- swirl vanes, 13- central cylinders；14- outer shroud air flow channels；15- inner ring air streams
Road；16- annular air clefts；17- annular air cleft air flow channels；50- first order fuel nozzle ports；130- central cylinder air inlets.
Embodiment
Below in conjunction with the accompanying drawings (Fig. 1-Fig. 2) the present invention will be described.
Fig. 1 is the structural representation for implementing a kind of big backflow low NO of high-temperature flue gas of the invention.During Fig. 2 is Fig. 1
Central unit construction schematic diagram.As shown in Figure 1 to Figure 2, a kind of big backflow low NO of high-temperature flue gas, including burner shell
2, the rear end of the burner shell 2, which has in the connecting interface of connection air intake section 1, the burner shell 2, to be provided with
Central cylinder 13, the centre of central cylinder front end 3 is provided with third level fuel nozzle ports 10, is set along the centre
Several fins 4 radially distributed are equipped with, second level fuel nozzle ports 11 are distributed in the middle of several described fins 4, described
Swirl vane 12 and central cylinder air inlet 130 are disposed with from the front to the back on the rear portion outer peripheral face of central cylinder 13,
Inner sleeve 8 is provided with the front end outer peripheral face of the central cylinder 13, between the inner sleeve 8 and the central cylinder 13
Form inner ring air flow channel 15, the outside of the inner sleeve 8 is provided with outer sleeve 9, the outer sleeve 9 and the inner sleeve 8 it
Between form annular air cleft air flow channel 17, the front end of the annular air cleft air flow channel 17 is provided with porous disc 6, the annular gas
The rear end of seam air flow channel 17 is the annular air cleft 16 formed between the outer sleeve 9 and the inner sleeve 8, the outer sleeve 9
Formed between the burner shell 2 in outer shroud air flow channel 14, the outer shroud air flow channel 14 and be provided with first order fuel
Jet pipe 5, the first order fuel nozzle ports 50 of the first order fuel nozzle 5 are towards the inwall of the burner shell 2.
The first order fuel nozzle ports 50 are located on the front end outer peripheral face of the first order fuel nozzle 5.The burner
Housing forward end inwall blade 7 (also known as small air blade) is provided with housing 2.The outer sleeve 9 and the inner sleeve 8 are loudspeaker
Shape；Or, the outer sleeve is tubaeform, and the inwall of the inner sleeve is straight barrel type and outer wall is taper；The annular air cleft
16 slit width is adjusted by the axial displacement between the outer sleeve 9 and the inner sleeve 8, when the outer sleeve 9 is moved along
When, the slit width narrows.The number of several fins 4 is 10~20.The number of the swirl vane 12 is 10~30
Individual, the setting angle of swirl vane 12 is 10~30 °.The number of the first order fuel nozzle 5 is 5~10.The second level
The number of fuel nozzle ports 11 is 4~8.The number of the third level fuel nozzle ports 10 is 6~12.The porous disc 6 is opened
Porosity is 1~5%.The setting angle of the housing forward end inwall blade 7 is 10~30 °.The first order fuel nozzle ports 50 are sprayed
The fuel quantity gone out accounts for the 80~90% of total fuel quantity.The fuel quantity that the second level fuel nozzle ports 11 spray accounts for the 5 of total fuel quantity
~10%.The fuel quantity that the third level fuel nozzle ports 10 spray accounts for the 1~5% of total fuel quantity.
Refering to Fig. 1-Fig. 2, combustion air (also known as fires from air intake section 1 into burner shell 2 in the present embodiment
Burner sleeve) in, have sub-fraction air-flow by central cylinder air inlet 130 be split enter central cylinder 13 in after from
The side of fin 4 outflow of central cylinder front end 3, most of airflow passes swirl vane 12, and eddy flow circumferential passages.In rotation
Flow in the presence of blade, air stream carries certain curl.Air stream is divided into three strands of air-flows, three strands of air-flows in burner front end
Flow separately through inner ring air flow channel 15, annular air cleft 16 (also known as annular enters air cleft) and outer shroud air flow channel 14.Outer shroud air
Big return-flow structure is formed in burner hearth middle and lower part, the formation of the environment of flue gas interior circulation, effectively reduction thermal NO X is formed.It is interior
Annular space gas forms the small plot structure that flowed back to whirlpool, when being carried out when burning, the flue gas meeting that flame front is produced before burner nozzle
It is back in this recirculating zone, the flue gas recirculation inside formation, not only acts as the purpose of stable burning, and also reduces NOx
Generation.The uninterrupted of three strands of described air-flows can be controlled by adjusting outer sleeve 9 in the position of axial direction.
Refering to Fig. 1, the side of fin 4 can form the weak eddy flow in center as air outlet, the air-flow of outflow, and this weak eddy flow is not
Only there is facilitation to fuel blending, and have certain effect to stablizing burning.The number of fin 4 10-20, the length of fin 4
About the 1/3 of the diameter of central cylinder front end 3.Number, length and the width of the fin 4 can enter according to natural fuel situation
Row adjustment.Refering to Fig. 2, the major function of the swirl vane 12 is to provide certain gas cyclone number, spinning disk number 10
~30.In the present embodiment, the number of swirl vane 12 is 16,30 ° of setting angle.The big I of the eddy flow of swirl vane 12
With by the number for adjusting swirl vane 12, swirl vane 1) setting angle optimize.Refering to Fig. 1, the porous disc 6 it is big
The small influence to overall flow field is very big, and the size of porous disc 6 influences the flow velocity of combustion-supporting air flow, so as to influence combustion stability
And combustion flame form.In the present embodiment, the size of porous disc 6 is adjusted to reach inner and outer rings air velocity
60m/s or so size range.
Fuel quantity point three-level ratio is allocated in the present embodiment, and wherein primary fuel jet pipe is located at burner cylinder
Periphery, primary fuel spout 50 is opened in the side wall of primary fuel jet pipe 5, and fuel strikes burning after the ejection of primary fuel spout 50
Body cylinder wall, as outer shroud air stream flows to burner hearth after having preliminary mix with outer shroud air stream.Secondary fuel spout 11 is opened
In the outer circumferential side region of central cylinder front end 3.Three-level fuel nozzle ports 10 are opened in the inner ring circumferential area in central cylinder front end 3.
Fuel with the side outlet of fin 4 flow after tentatively premixing after secondary fuel spout 11 and three-level fuel nozzle ports 10 spray
Enter burner hearth to be burnt.Number, fuel injection speed, the fuel nozzle ports shape of fuel nozzle can be adopted to control fuel and air
Incorporation time.The number of primary fuel jet pipe 5 is 5~10.In the present embodiment, jet pipe number is 5, nozzle configuration
To be square.The number of secondary fuel spout 11 4~8, in the present embodiment, spout number are 4, and nozzle configuration is circle
Shape.The number of three-level fuel nozzle ports 10 is 6~12, in the present embodiment, and spout number is 8, and nozzle configuration is circle.
It is hereby stated that, it is described above to contribute to skilled artisan understands that the invention, but not limit the present invention
The protection domain of creation.It is any that equivalent substitution described above, modification are improved without departing from the invention substantive content
And/or the implementation deleted numerous conform to the principle of simplicity and carried out, each fall within the protection domain of the invention.
Claims (10)
1. a kind of big backflow low NO of high-temperature flue gas, it is characterised in that including burner shell, the burner shell
Rear end, which has in the connecting interface of connection air intake section, the burner casing body, is provided with central cylinder, central cylinder
The centre of front end is provided with third level fuel nozzle ports, and several ribs radially distributed are provided with along the centre
Piece, second level fuel nozzle ports are distributed in the middle of several described fins, by forward direction on the rear portion outer peripheral face of the central cylinder
After be disposed with swirl vane and central cylinder air inlet, the outer peripheral face of the central cylinder front end and be provided with inner sleeve
Cylinder, forms on the outside of inner ring air flow channel, the inner sleeve between the inner sleeve and the central cylinder and is provided with overcoat
Cylinder, forms annular air cleft air flow channel, the front end of the annular air cleft air flow channel between the outer sleeve and the inner sleeve
Porous disc is provided with, the rear end of the annular air cleft air flow channel is the annular formed between the outer sleeve and the inner sleeve
Air cleft, forms between the outer sleeve and the burner shell and is provided with outer shroud air flow channel, the outer shroud air flow channel
First order fuel nozzle, the first order fuel nozzle ports of the first order fuel nozzle are towards the inwall of the burner shell.
2. a kind of big backflow low NO of high-temperature flue gas according to claim 1, it is characterised in that the first order combustion
Expect that spout is located on the front end outer peripheral face of the first order fuel nozzle.
3. a kind of big backflow low NO of high-temperature flue gas according to claim 1, it is characterised in that the burner casing
It is provided with housing forward end inwall blade in vivo.
4. the big backflow low NO of a kind of high-temperature flue gas according to claim 1, it is characterised in that the outer sleeve with
The inner sleeve is tubaeform；Or, the outer sleeve is tubaeform, and the inwall of the inner sleeve is straight barrel type and outer wall is
Taper；The slit width of the annular air cleft is adjusted by the axial displacement between the outer sleeve and the inner sleeve, when described outer
When sleeve is moved along, the slit width narrows.
5. a kind of big backflow low NO of high-temperature flue gas according to claim 1, it is characterised in that several described ribs
The number of piece is 10~20.
6. a kind of big backflow low NO of high-temperature flue gas according to claim 1, it is characterised in that the swirl vane
Number be 10~30, swirl vane setting angle be 10~30 °.
7. a kind of big backflow low NO of high-temperature flue gas according to claim 1, it is characterised in that the first order combustion
The number for expecting jet pipe is 5~10, and the number of the second level fuel nozzle ports is 4~8, of the third level fuel nozzle ports
Number is 6~12.
8. the big backflow low NO of a kind of high-temperature flue gas according to claim 1, it is characterised in that the porous disc
Percent opening is 1~5%.
9. a kind of big backflow low NO of high-temperature flue gas according to claim 3, it is characterised in that the housing forward end
The setting angle of inwall blade is 10~30 °.
10. a kind of big backflow low NO of high-temperature flue gas according to claim 1, it is characterised in that the first order
The fuel quantity that fuel nozzle ports spray accounts for the 80~90% of total fuel quantity, and the fuel quantity that the second level fuel nozzle ports spray accounts for total combustion
The 5~10% of doses, the fuel quantity that the third level fuel nozzle ports spray accounts for the 1~5% of total fuel quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369010.6A CN107062226B (en) | 2017-05-23 | 2017-05-23 | High-temperature flue gas large-backflow low-nitrogen combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369010.6A CN107062226B (en) | 2017-05-23 | 2017-05-23 | High-temperature flue gas large-backflow low-nitrogen combustor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107062226A true CN107062226A (en) | 2017-08-18 |
| CN107062226B CN107062226B (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710369010.6A Active CN107062226B (en) | 2017-05-23 | 2017-05-23 | High-temperature flue gas large-backflow low-nitrogen combustor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477580A (en) * | 2017-09-07 | 2017-12-15 | 温岭威索燃烧器有限公司 | Low NO |
| CN110822430A (en) * | 2019-11-22 | 2020-02-21 | 华侨大学 | Low-nitrogen combustor based on multistage swirler |
| CN111023091A (en) * | 2019-12-23 | 2020-04-17 | 清华大学 | High-temperature flue gas multi-stage backflow low-nitrogen combustor and combustion method thereof |
| CN111121023A (en) * | 2020-01-10 | 2020-05-08 | 清华大学 | Fuel side flue gas recirculation nitrogen combustor and combustion method thereof |
| WO2020259577A1 (en) * | 2019-06-28 | 2020-12-30 | 浙江先创能源科技股份有限公司 | Combustor with low nitrogen oxide emission |
| WO2021051635A1 (en) * | 2019-09-18 | 2021-03-25 | 安德森热能科技（苏州）有限责任公司 | Low-nitrogen air heating turbulent burner |
| CN115406100A (en) * | 2022-09-05 | 2022-11-29 | 南京宜热纵联节能科技有限公司 | Indirect heat exchange type hot blast stove |
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| CN107477580A (en) * | 2017-09-07 | 2017-12-15 | 温岭威索燃烧器有限公司 | Low NO |
| WO2020259577A1 (en) * | 2019-06-28 | 2020-12-30 | 浙江先创能源科技股份有限公司 | Combustor with low nitrogen oxide emission |
| WO2021051635A1 (en) * | 2019-09-18 | 2021-03-25 | 安德森热能科技（苏州）有限责任公司 | Low-nitrogen air heating turbulent burner |
| US12066184B2 (en) | 2019-09-18 | 2024-08-20 | Anderson Thermal Solutions (Suzhou) Co., Ltd. | Low-NOx air heating swirl burner |
| CN110822430A (en) * | 2019-11-22 | 2020-02-21 | 华侨大学 | Low-nitrogen combustor based on multistage swirler |
| CN110822430B (en) * | 2019-11-22 | 2024-05-10 | 华侨大学 | Low-nitrogen combustor based on multistage cyclone |
| CN111023091A (en) * | 2019-12-23 | 2020-04-17 | 清华大学 | High-temperature flue gas multi-stage backflow low-nitrogen combustor and combustion method thereof |
| CN111023091B (en) * | 2019-12-23 | 2024-06-07 | 清华大学 | High-temperature flue gas multistage reflux low-nitrogen combustor and combustion method thereof |
| CN111121023A (en) * | 2020-01-10 | 2020-05-08 | 清华大学 | Fuel side flue gas recirculation nitrogen combustor and combustion method thereof |
| CN111121023B (en) * | 2020-01-10 | 2024-06-04 | 清华大学 | Fuel side flue gas recirculation nitrogen burner and combustion method thereof |
| CN115406100A (en) * | 2022-09-05 | 2022-11-29 | 南京宜热纵联节能科技有限公司 | Indirect heat exchange type hot blast stove |
| CN115406100B (en) * | 2022-09-05 | 2024-01-12 | 南京宜热纵联节能科技有限公司 | Indirect heat exchange type hot blast stove |
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