CN110748884A - Quasi-full premixing type ultralow nitrogen gas burner - Google Patents
Quasi-full premixing type ultralow nitrogen gas burner Download PDFInfo
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- CN110748884A CN110748884A CN201911283425.7A CN201911283425A CN110748884A CN 110748884 A CN110748884 A CN 110748884A CN 201911283425 A CN201911283425 A CN 201911283425A CN 110748884 A CN110748884 A CN 110748884A
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- gas
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- central gas
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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
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
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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
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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
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a quasi-full-premixing type ultralow-nitrogen gas burner which comprises a burner body, wherein a central gas channel and a plurality of air-fuel premixing channels arranged on the outer side of the central gas channel are arranged in the burner body, air inlets communicated with the central gas channel and the air-fuel premixing channels are formed in the burner body, a gas spray pipe communicated with the gas inlets is arranged at the rear end of each air-fuel premixing channel, a plurality of fine holes are formed in the gas spray pipe, a central gas pipeline communicated with the gas inlets is arranged in the central gas channel, a plurality of central gas holes are formed in one end of the central gas pipeline, and a swirler is arranged on the outer side of the end part of the central gas pipeline and positioned in the central gas channel. The invention adopts a quasi-full premix combustion technology, does not need air filtration, and greatly reduces the maintenance cost and the blowing-out cost.
Description
Technical Field
The invention belongs to the technical field of gas burners, and particularly relates to a quasi-fully-premixed ultralow-nitrogen gas burner.
Background
The existing fully-premixed gas burners of other brands in China all use a surface combustion technology, after gas and air are completely mixed, the gas is ignited after passing through a sintered or woven surface wire mesh, and the tempering is prevented by utilizing the principle that the diameter of a gap of the wire mesh is smaller than the flameout distance of the gas.
The full premix surface combustor need set up air cleaner and filter combustion air, air cleaner needs regularly to clear up, otherwise can be more and more serious along with the lapse of time because the jam of filter, thereby cause combustion air volume to lack, combustion air lacks and can lead to the serious imbalance of air-fuel ratio, the gas burning influences the combustor to exert oneself from the beginning, in addition, air or gas filter can make some tiny dusts bond on the wire net of combustion head not completely, cause partial gap to block up, the flame field is inhomogeneous, local wire net temperature is concentrated, thereby cause the production of ablation phenomenon, in case burn and lose the big hole of formation, can produce the accident of backfire explosion.
In order to solve the problems that the proposed burner has the risk of backfire explosion, needs air filtration and is limited in power range, the proposed burner adopts a quasi-full premixing combustion technology, does not need air filtration, and greatly reduces the maintenance cost and the blowing-out cost.
Disclosure of Invention
The invention aims to provide a quasi-fully-premixed ultralow-nitrogen gas burner to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a quasi-mix formula ultralow nitrogen gas burner entirely, includes the combustor body, this internal central gas passageway that is equipped with of combustor and a plurality of air-fuel gas of locating the central gas passageway outside mix the passageway in advance, be equipped with on the combustor body with central gas passageway and air-fuel gas mix the air inlet that the passageway was put through mutually, every the rear end that the passageway was mixed in advance to air-fuel gas is equipped with the gas spray tube of putting through mutually with the gas inlet, be equipped with a plurality of pores on the gas spray tube, be equipped with the central gas pipeline of putting through mutually with the gas inlet in the central gas passageway, the one end of central gas pipeline is equipped with a plurality of central gas holes, the outside of central gas pipeline tip just is located and is equipped with the swirler.
Preferably, the central gas hole is positioned at the right end part of the central gas pipeline.
Preferably, the gas nozzle extends into the left end of the air-gas premixing channel.
The invention has the technical effects and advantages that: the quasi-fully premixed ultra-low nitrogen gas burner uses a small amount of gas in the center of the burner, adopts a diffusion combustion mode, has the characteristics of stable flame and no backfire risk in the diffusion combustion mode, is used as stable on-duty flame, most of the gas is completely mixed with air in a plurality of premixing channels, is ignited by the central on-duty flame and is stably combusted, the premixing channels have no relatively closed space, are open and have no explosion risk, and the flow speed of the mixture in the premixing channels is also higher than the flame propagation speed under the lowest load of the burner, so that the backfire phenomenon is avoided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a burner body; 2. a central gas channel; 3. an air-fuel gas premixing passage; 4. an air inlet; 5. a gas inlet; 6. a gas nozzle; 7. fine pores; 8. a central gas pipeline; 9. a central gas hole; 10. a cyclone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a quasi-fully-premixed ultralow-nitrogen gas burner as shown in figure 1, which comprises a burner body 1, wherein a central gas channel 2 and a plurality of air-gas premixing channels 3 arranged on the outer side of the central gas channel 2 are arranged in the burner body 1, an air inlet 4 communicated with the central gas channel 2 and the air-gas premixing channels 3 is arranged on the burner body 1, a gas spray pipe 6 communicated with a gas inlet 5 is arranged at the rear end of each air-gas premixing channel 3, a plurality of fine holes 7 are arranged on the gas spray pipe 6, a central gas pipeline 8 communicated with the gas inlet 5 is arranged in the central gas channel 2, a plurality of central gas holes 9 are arranged at one end of the central gas pipeline 8, and a swirler 10 is arranged on the outer side of the end part of the central gas pipeline 8 and positioned in the central gas channel 2.
Specifically, the central gas hole 9 is located at the right end of the central gas pipeline 8.
Specifically, the gas nozzle 6 extends into the left end of the air-gas premixing channel 3.
The quasi-full premixing type ultra-low nitrogen gas burner has the advantages that a small amount of gas is used as on-duty flame in the central gas channel 2, a diffusion type combustion mode is used, the risk of backfire does not exist, combustion-supporting air strongly rotates through the swirler 10, the on-duty flame is stabilized on the tube plate at the front part of the combustion head, the temperature of the tube plate cannot be too high due to the fact that a large amount of cold air is arranged on the rear side of the tube plate, a plurality of air-fuel gas premixing channels 3 are arranged on the outer side of the central gas channel 2, a gas spray pipe 6 is arranged at the rear end of each air-fuel gas premixing channel 3, a plurality of pores 7 are arranged on the gas spray pipe 6, gas flow is refined, high-speed sprayed gas and air on the rear side are strongly mixed in the air-fuel gas premixing channels 3, the completely mixed air-fuel gas mixture is ignited and rapidly combusted by the on-duty flame at the outlet of the air-fuel gas, the air-fuel premixing channel 3 is made of stainless steel straight pipes, relatively closed space is avoided, explosion risks are avoided even though instantaneous backfire occurs, the quasi-full premixing type ultra-low nitrogen gas burner does not need a surface combustion technology, air filtration is not needed, maintenance cost and furnace shutdown cost are greatly reduced, the duty ratio of central on-duty flame load is very low, NOx discharge amount formed by diffusion combustion is diluted into overall discharge and has little influence on the overall discharge, more than 90% of full premixing combustion is achieved, NOx discharge is very low, CO is basically zero, the discharge is infinitely close to that of the full premixing burner, backfire explosion risks are avoided, and large-tonnage full premixing combustion becomes possible.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides a quasi-mixes formula ultralow nitrogen gas combustor entirely, includes combustor body (1), its characterized in that: a central gas channel (2) and a plurality of air-gas premixing channels (3) arranged outside the central gas channel (2) are arranged in the burner body (1), the combustor body (1) is provided with air inlets (4) communicated with the central gas channel (2) and the air-fuel gas premixing channels (3), the rear end of each air-fuel gas premixing channel (3) is provided with a gas nozzle (6) communicated with a gas inlet (5), a plurality of pores (7) are arranged on the gas jet pipe (6), a central gas pipeline (8) communicated with the gas inlet (5) is arranged in the central gas channel (2), one end of the central gas pipeline (8) is provided with a plurality of central gas holes (9), and a swirler (10) is arranged outside the end part of the central gas pipeline (8) and in the central gas channel (2).
2. The quasi-fully premixed ultra-low nitrogen gas burner as claimed in claim 1, wherein: the central gas hole (9) is positioned at the right end part of the central gas pipeline (8).
3. The quasi-fully premixed ultra-low nitrogen gas burner as claimed in claim 1, wherein: and the gas spray pipe (6) extends into the left end of the air-gas premixing channel (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844863 | 2019-09-07 | ||
| CN201910844863X | 2019-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110748884A true CN110748884A (en) | 2020-02-04 |
Family
ID=69285944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911283425.7A Pending CN110748884A (en) | 2019-09-07 | 2019-12-13 | Quasi-full premixing type ultralow nitrogen gas burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110748884A (en) |
-
2019
- 2019-12-13 CN CN201911283425.7A patent/CN110748884A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200204 |
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| WD01 | Invention patent application deemed withdrawn after publication |