CN109253630A - A kind of two-stage exchanges heat low NOx self preheating burner - Google Patents
A kind of two-stage exchanges heat low NOx self preheating burner Download PDFInfo
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- CN109253630A CN109253630A CN201811304912.2A CN201811304912A CN109253630A CN 109253630 A CN109253630 A CN 109253630A CN 201811304912 A CN201811304912 A CN 201811304912A CN 109253630 A CN109253630 A CN 109253630A
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- pipe
- burner
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- combustion
- combustion chamber
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- 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
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- 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
- F23D14/48—Nozzles
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The present invention discloses a kind of two-stage and exchanges heat low NOx self preheating burner, combustion air at air inlet, with exchange heat respectively with flue gas at combustion gas mixing burning, fume afterheat can efficiently be utilized, improve efficiency of combustion, it achieves energy-saving and emission reduction purposes, reduces NOx emission, while classification fuel gas supply structure is set, different combustion systems is set as needed, improves efficiency of combustion；And blast tube surface is socketed spring and is fixed in burner pipe by spring, can guarantee safety and the stability of gas burning system structure, and then the safety for improving the physical life of integral device and using when burner interior arrangement has thermal expansivity displacement.
Description
Technical field
The present invention relates to self preheating burner field, espespecially a kind of two-stage exchanges heat low NOx self preheating burner.
Background technique
Industrial class production activity is the main inducing of energy and environment problem, and the equipment such as industrial furnace are that atmosphere pollution is main
Source, while being also high energy-consuming industry equipment.Burner directly determines industrial furnace as one of main device of industrial furnace
Energy consumption and pollutant discharge amount.
Self preheating burner is a kind of typical industrial furnace burner, and burner both serves as burner, also functions as smoke evacuation
Device, and at the same time carrying out, but the combustion system of conventional burner is single, heat exchange efficiency is lower always, and the heat exchanger service life is shorter, right
Material requirements is higher, while traditional structure is when for there is the conventional combustion modes of air preheat, the fluff pulps such as NOx compared with
Greatly, it is difficult to meet environmental protection standard.
Summary of the invention
It exchanges heat low NOx self preheating burner to solve the above problems, the present invention provides a kind of two-stage, it being capable of efficient land productivity
NOx emission is reduced with fume afterheat, various combustion system is realized, improves efficiency of combustion, achieve energy-saving and emission reduction purposes, mention simultaneously
The safety that high equipment life and raising use.
To achieve the above object, one of the technical solution adopted by the present invention: a kind of two-stage is provided and is exchanged heat low NOx self-preheating
Formula burner, including burner pipe, combustion chamber, air hose, blast tube, smoke exhaust pipe, igniter, the surface socket of burner pipe rear end
There is gas-guide tube and be socketed with smoke guide pipe with air line, air guide pipe surface and be connected to smoke exhaust pipe, one end of combustion chamber is equipped with
Ejiction opening, combustion chamber is arranged in burner pipe and ejiction opening extends to outside burner pipe front end, and blast tube is arranged in burner pipe
And one end and combustion chamber, the firing tip of igniter are arranged in the combustion chamber, smoke exhaust pipe is socketed in air pipe surface,
It is characterized in that, the front end of burner pipe is socketed with heat exchanger tube, and the surfaces externally and internally of heat exchanger tube is equipped with heat exchange fin, one end of heat exchanger tube
It is docked and connected with gas-guide tube, the other end of heat exchanger tube extends to forms circumferential weld gap between ejiction opening at ejiction opening, blast tube
The other end is socketed with spring and is fixed in burner pipe by spring, is equipped with fuel gas conduit in blast tube, one end of fuel gas conduit with
Connection outside burner pipe, the fuel gas conduit other end are connected with current divider and are arranged in the combustion chamber, and current divider one end is connected with main combustion
Tracheae simultaneously extends at ejiction opening, and current divider surface is equipped with the tap hole of connection combustion chamber and fuel gas conduit, and air tube outer surface is set
It is equipped with heat exchange fin.
Preferably, further including wind disk, the wind disk is socketed in current divider surface, and wind panel surface is peripherally disposed
There is air duct, air duct is connected to combustion chamber and burner pipe.
Preferably, the air duct includes circular air channel and bar shaped air duct, and circular air channel and bar shaped air duct are alternately divided
Cloth.
Preferably, being additionally provided with limiter in the air hose, limiter is arranged along air hose extending direction.
Preferably, the surface of the limiter is provided with heat exchange fin.
Preferably, the surface of the spring is socketed with insulating lining.
Preferably, the surface of burner pipe rear end is equipped with the cooling air holes in connection gas-guide tube and burner pipe.
Preferably, the tap hole is distributed centered on blast tube central spindle along current divider circumferencial direction.
To achieve the above object, the two of the technical solution adopted by the present invention: a kind of two-stage is provided and is exchanged heat low NOx self-preheating
Formula burner, including burner pipe, combustion chamber, air hose, blast tube, smoke exhaust pipe, igniter, the surface socket of burner pipe rear end
There is gas-guide tube and be socketed with smoke guide pipe with air line, air guide pipe surface and be connected to smoke exhaust pipe, one end of combustion chamber is equipped with
Ejiction opening, combustion chamber is arranged in burner pipe and ejiction opening extends to outside burner pipe front end, and blast tube is arranged in burner pipe
And one end and combustion chamber, the firing tip of igniter are arranged in the combustion chamber, smoke exhaust pipe is socketed in air pipe surface, burns
The front end of mouth pipe is socketed with heat exchanger tube, and the surfaces externally and internally of heat exchanger tube is equipped with heat exchange fin, one end of heat exchanger tube and gas-guide tube pair
Lead in succession, the other end of heat exchanger tube extends to and forms circumferential weld gap at ejiction opening between ejiction opening, the other end socket of blast tube
There is spring and be fixed in burner pipe by spring, main combustible pipe and auxiliary fuel gas conduit, main combustible pipe setting are equipped in blast tube
In auxiliary fuel gas conduit, it is connected to outside one end of auxiliary fuel gas conduit and burner pipe, the other end of auxiliary fuel gas conduit is connected with current divider and sets
It sets in the combustion chamber, current divider surface is equipped with the tap hole of connection combustion chamber and auxiliary fuel gas conduit, one end of main combustible pipe and burner
Connection outside pipe, the main combustible pipe other end is through current divider and extends at ejiction opening, and air tube outer surface is provided with heat exchange wing
Piece.
The beneficial effects of the present invention are:
1. by the way that heat exchange fin heat exchanger tube is arranged in the front end of burner pipe, while heat exchange fin is arranged in air tube outer surface, burn
High-temperature fuel gas after mouth burning exchanges heat to the combustion air in burner pipe by heat exchange fin heat exchanger tube when being back to burner,
The heat exchange fin being arranged when smoke exhaust pipe discharge by air tube outer surface is then passed through to the combustion air entered from air nozzle
It exchanges heat, i.e., carries out the heat exchange of two-stage to combustion air, effectively increase the efficiency of heat exchange, maximumlly improve preheated air
Temperature is fully warmed-up combustion air using the waste heat of flue gas, improves efficiency of combustion, reduces the generation of NOx；
2. be provided with tap hole on current divider by being provided with current divider in the combustion chamber, can according to the needs of combustion system, if
It sets single main combustible pipe and main combustible pipe and auxiliary fuel gas conduit is connect or be arranged simultaneously with current divider, wherein auxiliary fuel gas conduit and tap hole
The independent air inlet in auxiliary fuel gas conduit is arranged in connection, main combustible pipe, and different combustion systems is set as needed, and improves burning effect
Rate reduces the generation of NOx, achieves energy-saving and emission reduction purposes；
3. in conjunction with air classification technology under the premise of combustion gas classification, most of combustion air from air hose enter burner pipe to
Up to combustion chamber, and the indoor combustion gas mixing of burning is entered, part combustion air enters heating space from ring wind gap, with ejiction opening
Second-time burning is carried out after partial reflux flue gas mixing in neighbouring combustion gas, single-stage combustion product and heating space, at high speed fire
Flame, high-speed flame can roll up the flue gas around inhaling and participate in burning, flame combustion temperature can be effectively reduced, to reduce the production of NOx
It is raw；
4. can have in burner interior arrangement by being socketed spring on blast tube surface and being fixed in burner pipe by spring
Guarantee safety and the stability of gas burning system structure when thermal expansivity shifts, and then improves the physical life of integral device and make
Safety.
Detailed description of the invention
Fig. 1 is the internal structure sectional view of embodiment one；
Fig. 2 is the enlarged diagram in Fig. 1 at A；
Fig. 3 is the structural schematic diagram of wind disk；
Fig. 4 is the scheme of installation that direct open firing is used in embodiment one；
Fig. 5 is the scheme of installation that radiant tube indirect heating is used in embodiment one；
Fig. 6 is the structural schematic diagram of embodiment two.
Specific embodiment
Embodiment one
Refering to Figure 1, the present embodiment is about a kind of low NOx self preheating burner of two-stage heat exchange, including burner pipe 1, combustion
Room 21, air hose 14, blast tube 11, smoke exhaust pipe 3, igniter 23 are burnt, the surface of 1 rear end of burner pipe is socketed with gas-guide tube
16, air hose 14 is arranged on 16 surface of gas-guide tube and communicates therewith, and air scoop 4, gas-guide tube 16 are equipped at the nozzle of air hose 14
Surface is socketed with smoke guide pipe 25, and the setting of smoke exhaust pipe 3 on 25 surface of smoke guide pipe and communicates therewith, and the side wall of smoke exhaust pipe 3 is equipped with row
Mouth 5, one end of combustion chamber 21 are equipped with ejiction opening 30, and one end of combustion chamber 21 is fixed at burner pipe 1 by supporting element 20
It is interior, and ejiction opening 30 extends to outside 1 front end of burner pipe, blast tube 11 is arranged in burner pipe 1 and one end of which is fixed on supports
On part 20, the firing tip of igniter 23 is extended in combustion chamber 21, and smoke exhaust pipe 3 is socketed in 14 surface of air hose.
Wherein the front end of burner pipe 1 is socketed with heat exchanger tube 17, and the surfaces externally and internally of heat exchanger tube 17 is equipped with heat exchange fin, heat exchange
One end of pipe 17 is docked and connected with gas-guide tube 16, and the other end of heat exchanger tube 17 is extended at ejiction opening 30 and formed between ejiction opening 30
Circumferential weld gap 32, the other end of blast tube 11 is socketed with spring 10 and is fixed in burner pipe 1 by spring 10, outside burner pipe 1
It is provided with combustion gas shell 7, gas port 6 is offered on combustion gas shell 7, external connect for gas combustion apparatus with gas port 6 provides combustion
Gas, blast tube 11 is interior to be equipped with fuel gas conduit 35, and one end of fuel gas conduit 35 is connected to gas port 6, and 35 other end of fuel gas conduit is connected with
Current divider 34 is simultaneously arranged in combustion chamber 21, and 34 one end of current divider is connected with main combustible pipe 12 and extends at ejiction opening 30, point
The tap hole 13 that 34 surface of device is equipped with connection combustion chamber 21 and fuel gas conduit 35 is flowed, 14 outer surface of air hose is provided with heat exchange fin
36。
Burner in the specific application process, can be directly fixed on the side of heating space by the present embodiment by mounting flange 9
It on wall, extends to burner inside heating space, i.e., (as shown in Figure 4) is realized using the mounting means of direct open firing, together
When can also the surface of burner be socketed radiant tube, i.e., using indirect heating mounting means realize (as shown in Figure 5).
The specific working principle of the present embodiment is as follows:
A. combustion gas enters fuel gas conduit 35 from gas port 6, is main combustion gas by 34 main combustible pipe 12 of current divider, passes through current divider 35
Combustion gas supplemented by after the shunting of tap hole 13, main combustion gas, which is sprayed by main combustible pipe 12 from ejiction opening 30, enters heating space, auxiliary combustion gas
Into combustion chamber 21；
B. combustion air enters air hose 14 by air scoop 4, passes through in combustion air traveling process and exchanges heat on the outside of air hose 14
Fin 36 and the flue gas of smoke exhaust pipe 3 are once exchanged heat, and then enter heat exchanger tube 17 by gas-guide tube 16, by heat exchanger tube 17
The flue gas to flow back in the heat exchange fin and heating space of outer surface carries out secondary heat exchange, and subsequent combustion air is punished in combustion chamber 21
Stream, one is First air, flows back into behind 1 inner space of burner pipe and enters combustion chamber 21 and auxiliary combustion gas mixing through supporting element 20；Separately
One is Secondary Air, enters heating space and main combustion gas mixing (as shown in Figure 2) by circumferential weld gap 32；
C. after First air and auxiliary combustion gas are mixed in combustion chamber 21, by 23 ignition of igniter, single-stage combustion product is formed
Spray ejiction opening 30；Secondary Air and heating space of the main combustion gas near ejiction opening 30 and in single-stage combustion product, circumferential weld gap 32
Second-time burning is carried out after interior partial reflux flue gas mixing, overall process is a kind of double fractional combustion modes.
D. flue gas flows back from heating space, after the heat exchange fin of 17 outer surface of heat exchanger tube and combustion air heat exchange, enters
Smoke guide pipe 25 is discharged using after smoke exhaust pipe 3 from smoke outlet 5, the heat exchange wing during flowing through smoke exhaust pipe 3, with 14 surface of air hose
Piece 36 exchanges heat to combustion air.
It please refers to shown in Fig. 1 and 3, the present embodiment further includes wind disk 22, and the wind disk 22 is socketed in 34 surface of current divider, wind
22 surface of disk is peripherally disposed air duct, and air duct is connected to combustion chamber 21 and burner pipe 1.Combustion air is changed by heat exchanger tube 17
After heat, a part is flowed back into inside burner pipe 1, so that combustion air is equably entered back into combustion chamber 21 by the air duct of wind disk 22,
The mixing of auxiliary combustion gas in combustion air and combustion chamber 21 can effectively be reinforced, improve burning condition, to further increase combustion gas and helping
The mixture homogeneity of air is fired, air duct rounded air duct B and bar shaped air duct A are alternately distributed.
Further, in this embodiment being additionally provided with limiter 15 in air hose 14, limiter 15 is along 14 side of extension of air hose
To setting, the top of limiter 15 passes through fixed bracket 27 and is connected at air scoop 4, and air hose 14 passes through bellows 28 and air
Mouth 4 connects, and the purpose of setting limiter 15 is, after combustion air enters air hose 14 from air scoop 4, due to limiter 15
Effect make enter combustion air branch to 15 surrounding of limiter to close to 14 wall surface of air hose circulate, to improve combustion air
Heat exchange efficiency, limiter 15 can be set to solid core or hollow；It furthermore is the heat exchange efficiency for further increasing combustion air, it can
On the surface of limiter 15, heat exchange fin 36 is set.
In the present embodiment, the surface of spring 10 is socketed with insulating lining 26, after have passed through secondary heat exchange due to combustion air
Temperature is very high, and a part can enter in burner pipe 1, therefore being socketed with insulating lining 26 on the surface of spring 10 can be to spring 10
High temperature protection was carried out, its damage is prevented.
Further, the surface of 1 rear end of burner pipe is equipped with the cooling air holes 19 in connection gas-guide tube 16 and burner pipe 1, helps
It fires air and enters gas-guide tube 16 after air hose 14 once heat exchange, small part only passes through the relatively lower temp once to exchange heat
Combustion air passes through cooling air holes 19 and enters burner pipe 1, can be to spring 10, insulating lining 26, the blast tube 11 in burner pipe 1
It cools down, prevents temperature excessively high and damage, furthermore this part combustion air subsequently enters combustion chamber 21 and combustion chamber 21
Interior auxiliary combustion gas mixing.
As preferably embodiment, the tap hole 13 in current divider 34 is centered on 11 central spindle of blast tube along current divider
The distribution of 34 circumferencial directions, enables the auxiliary combustion gas entered in combustion chamber 21 to be uniformly distributed, preferably mixes with combustion air, to mention
High burning efficiency.
Embodiment two
The present embodiment and embodiment one the difference is that, main gas port 61 and auxiliary combustion gas are offered on combustion gas shell 7 respectively
Mouth 6, external connect for gas combustion apparatus with main gas port 61 and auxiliary gas port 6 provide combustion gas.
Main combustible pipe 12, auxiliary fuel gas conduit 121 are equipped in blast tube 11, wherein main combustible pipe 12 is arranged in auxiliary fuel gas conduit
In 121, one end of auxiliary fuel gas conduit 121 is connected to auxiliary gas port 6, and the other end of auxiliary fuel gas conduit 121 is connected with current divider 34 and sets
It sets in combustion chamber 21,34 surface of current divider is equipped with the tap hole 13 of connection combustion chamber 21 and auxiliary fuel gas conduit 121；Main combustible pipe 12
One end be connected to main gas port 61,12 other end of main combustible pipe is through current divider 34 and extending at ejiction opening 30.
The present embodiment is correspondingly arranged auxiliary combustion by the way that auxiliary fuel gas conduit 121 and main combustible pipe 12 is respectively set, and in combustion gas shell 7
Port 6 and main gas port 61, the structure energy flexible combination control gas supply mode, and control forms different combustion modes,
To adapt to different combustion needs.
Principle explanation is carried out below by specific combustion mode.
Three kinds of combustion modes can be formed according to control mode: only into auxiliary combustion gas, only into main combustion gas and major-minor combustion gas simultaneously into,
Three kinds of heating modes: low temperature mode, quickly heating, high temperature mode can be corresponded to respectively.
Low temperature mode
Igniter 23 is opened, and auxiliary gas port 6 opens air inlet, and main gas port 61 is closed, and combustion air does not preheat also, and cold conditions starts
Igniting is heated, and burning is abundant, no high-temperature region, and NOx generation amount is few；It should be noted that low temperature mode burner initialization
To this period of time of normal combustion is carried out, furnace temperature is gradually increasing since room temperature；NOx is always divided into three classes: heating power type, Quick-type and
Fuel type has thermal NO x only and occupies an leading position in the NOx that gaseous fuel combustion generates, accounting 90%, thermal NO x only with
High-temperature region is related, i.e., ignition temperature is greater than 850 degree.
Quick heating mode: igniter 23 is opened, and main gas port 61 and auxiliary gas port 6 open air inlet, combustion air
It has been be preheated that, when need to quickly heat, belong to double fractional combustions at this time, sufficiently, NOx generation amount is few for burning；Wherein double fractional combustions
As air classification and combustion gas classification, it is consistent with principle in embodiment one, the difference is that, the present embodiment be two combustion gas into
Mouth controls major-minor combustion gas respectively.
High temperature mode: igniter 23 is closed, and auxiliary gas port 6 is closed, and main gas port 61 is opened, when temperature in heating space
When higher than 850 degree, air-fuel mixture is directly sprayed into heating space, it is whole to carry out nonflame oxidation, into smouldering state, temperature
Degree is uniform, no local high temperature zone, and NOx generation amount is few.
In the present embodiment, main gas port 61 and auxiliary gas port 6 are opened or closed, can be by solenoid valve control, by outside
Control system controls solenoid valve, and the igniting of igniter whether is equally controlled by external control system.
Embodiment of above be only preferred embodiments of the present invention will be described, not to the scope of the present invention into
Row limits, and without departing from the spirit of the design of the present invention, this field ordinary engineering and technical personnel is to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (9)
- The low NOx self preheating burner 1. a kind of two-stage exchanges heat, including burner pipe, combustion chamber, air hose, blast tube, smoke evacuation Pipe, igniter, the surface of burner pipe rear end is socketed with gas-guide tube simultaneously and air line, air guide pipe surface are socketed with smoke guide pipe And be connected to smoke exhaust pipe, one end of combustion chamber is equipped with ejiction opening, and combustion chamber is arranged in burner pipe and ejiction opening extends to burner Outside pipe front end, blast tube is arranged in burner pipe and one end and combustion chamber, the firing tip setting of igniter are being fired To burn indoor, smoke exhaust pipe is socketed in air pipe surface, which is characterized in that the front end of burner pipe is socketed with heat exchanger tube, and the one of heat exchanger tube End is docked and connected with gas-guide tube, and the other end of heat exchanger tube extends to forms circumferential weld gap, blast tube between ejiction opening at ejiction opening The other end be socketed with spring and be fixed in burner pipe by spring, fuel gas conduit, one end of fuel gas conduit are equipped in blast tube It is connected to outside burner pipe, the fuel gas conduit other end is connected with current divider and is arranged in the combustion chamber, and current divider one end is connected with master Fuel gas conduit simultaneously extends at ejiction opening, and current divider surface is equipped with the tap hole of connection combustion chamber and fuel gas conduit, air tube outer surface It is provided with heat exchange fin.
- The low NOx self preheating burner 2. two-stage according to claim 1 exchanges heat, which is characterized in that further include wind disk, institute It states wind disk and is socketed in current divider surface, wind panel surface is peripherally disposed air duct, and air duct is connected to combustion chamber and burner pipe.
- The low NOx self preheating burner 3. two-stage according to claim 2 exchanges heat, which is characterized in that the air duct includes Circular air channel and bar shaped air duct, and circular air channel and bar shaped air duct are alternately distributed.
- The low NOx self preheating burner 4. two-stage according to claim 1-3 exchanges heat, which is characterized in that described Limiter is additionally provided in air hose, limiter is arranged along air hose extending direction.
- The low NOx self preheating burner 5. two-stage according to claim 4 exchanges heat, which is characterized in that the limiter Surface is provided with heat exchange fin.
- The low NOx self preheating burner 6. two-stage according to claim 4 exchanges heat, which is characterized in that the table of the spring Surface cover is connected to insulating lining.
- The low NOx self preheating burner 7. two-stage according to claim 6 exchanges heat, which is characterized in that burner pipe rear end Surface is equipped with the cooling air holes in connection gas-guide tube and burner pipe.
- The low NOx self preheating burner 8. two-stage according to claim 1 exchanges heat, which is characterized in that the tap hole with It is distributed centered on blast tube central spindle along current divider circumferencial direction.
- The low NOx self preheating burner 9. a kind of two-stage exchanges heat, including burner pipe, combustion chamber, air hose, blast tube, smoke evacuation Pipe, igniter, the surface of burner pipe rear end is socketed with gas-guide tube simultaneously and air line, air guide pipe surface are socketed with smoke guide pipe And be connected to smoke exhaust pipe, one end of combustion chamber is equipped with ejiction opening, and combustion chamber is arranged in burner pipe and ejiction opening extends to burner Outside pipe front end, blast tube is arranged in burner pipe and one end and combustion chamber, the firing tip setting of igniter are being fired Burn indoor, smoke exhaust pipe is socketed in air pipe surface, which is characterized in that the front end of burner pipe is socketed with heat exchanger tube, heat exchanger tube it is interior Outer surface is equipped with heat exchange fin, and one end and the gas-guide tube of heat exchanger tube are docked and connected, and the other end of heat exchanger tube extends to ejiction opening Circumferential weld gap is formed between place and ejiction opening, the other end of blast tube is socketed with spring and is fixed in burner pipe by spring, fires Main combustible pipe and auxiliary fuel gas conduit are equipped in gas channel, main combustible pipe is arranged in auxiliary fuel gas conduit, one end of auxiliary fuel gas conduit and burner Connection outside pipe, the other end of auxiliary fuel gas conduit are connected with current divider and are arranged in the combustion chamber, and current divider surface is equipped with connection combustion The tap hole of room and auxiliary fuel gas conduit is burnt, is connected to outside one end of main combustible pipe and burner pipe, the main combustible pipe other end is through shunting Device simultaneously extends at ejiction opening, and air tube outer surface is provided with heat exchange fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811304912.2A CN109253630B (en) | 2018-11-04 | 2018-11-04 | Two-stage heat exchange low NOx self-preheating burner |
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| CN201811304912.2A CN109253630B (en) | 2018-11-04 | 2018-11-04 | Two-stage heat exchange low NOx self-preheating burner |
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| Publication Number | Publication Date |
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| CN109253630A true CN109253630A (en) | 2019-01-22 |
| CN109253630B CN109253630B (en) | 2023-09-12 |
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Cited By (2)
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| CN110440256A (en) * | 2019-07-26 | 2019-11-12 | 佛山市科皓燃烧设备制造有限公司 | A kind of high efficency low NOx second level self preheating burner |
| CN110976767A (en) * | 2019-12-18 | 2020-04-10 | 贵溪骏达特种铜材有限公司 | Bronze handicraft shell baking device |
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| CN110440256A (en) * | 2019-07-26 | 2019-11-12 | 佛山市科皓燃烧设备制造有限公司 | A kind of high efficency low NOx second level self preheating burner |
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| CN110976767A (en) * | 2019-12-18 | 2020-04-10 | 贵溪骏达特种铜材有限公司 | Bronze handicraft shell baking device |
| CN110976767B (en) * | 2019-12-18 | 2021-12-17 | 贵溪骏达特种铜材有限公司 | Bronze handicraft shell baking device |
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