CN216346263U - Novel marsh gas low-nitrogen burner - Google Patents
Novel marsh gas low-nitrogen burner Download PDFInfo
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- CN216346263U CN216346263U CN202123005557.9U CN202123005557U CN216346263U CN 216346263 U CN216346263 U CN 216346263U CN 202123005557 U CN202123005557 U CN 202123005557U CN 216346263 U CN216346263 U CN 216346263U
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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
Abstract
The utility model discloses a novel methane low-nitrogen burner which is assembled on a boiler body and comprises an ignition gun; a central spray gun is sequentially coaxially sleeved on the outer side of the ignition gun from inside to outside in a sleeved mode, the central spray gun is in clearance fit with the ignition gun, and a first methane inlet is formed in the side wall of the central spray gun; the central air pipe is in clearance fit with the central spray gun, and a first air inlet is formed in the side wall of the central air pipe; the main spray gun is in clearance fit with the central air pipe, and a second methane inlet is formed in the side wall of the main spray gun; a first swirler is further arranged inside the main spray gun and sleeved outside the central air pipe; the secondary air pipe is in clearance fit with the main spray gun, and a second air inlet is formed in the side wall of the secondary air pipe; a second swirler is further arranged inside the secondary air pipe and sleeved outside the main spray gun; adopts a staged combustion mode of sectional air supply for supplying advection methane, advection air, rotational flow methane and rotational flow air from the center to the periphery in turn.
Description
Technical Field
The utility model relates to the technical field of biogas combustion equipment, in particular to a novel biogas low-nitrogen burner.
Background
In the water treatment of stations such as kitchen waste treatment stations, waste incineration power plants, pharmaceutical plants, food plants, farms, paper mills and the like, more and more enterprises select a water treatment process of anaerobic fermentation, biogas is produced as a byproduct of the water treatment, the main component of the biogas is 50-70% of methane, and the biogas has a high calorific value. In order to recover the heat energy of the biogas, the biogas needs to be reasonably utilized, wherein the biogas is sent to a boiler for incineration, which is a simpler and more convenient utilization mode. However, in the process of burning the biogas, if the burner is poorly selected and controlled, a large amount of nitrogen oxides can be generated, and the environment is polluted.
The utility model discloses a chinese utility model patent, announcement date are 2015.05.20, and announcement number is CN 204345636U's a spiral-flow type biogas burner adopts swirl vane to form interior backward flow district and outer backward flow district, with marsh gas and the intensive mixing of helping the oxygen wind, has improved combustion efficiency, has practiced thrift the energy. The ignition gun in the utility model adopts the traditional assembly mode, and has low ignition reliability; secondly, biogas enters along a biogas pipeline, the oxygen-assisting air enters under the driving of an oxygen-assisting fan, and the flow rate, the consumption, the flow direction and the like of the biogas and the oxygen-assisting air are not well selected and controlled, so that insufficient combustion can be caused, and a large amount of thermal nitrogen oxides can be generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel biogas low-nitrogen burner, a biogas spray gun simultaneously has the function of an ignition gun sleeve, and the ignition reliability of the burner is improved; the burner has the center positioned in a methane-rich area through a staged combustion mode of sectional air supply for supplying advection methane, advection air, rotational flow methane and rotational flow air from the center to the periphery in sequence, so as to solve the problems in the background technology.
In order to achieve the above purpose, the utility model provides the following technical scheme: a novel methane low-nitrogen burner is assembled on a boiler body and comprises an ignition gun;
the outer side of the ignition gun is sequentially coaxially sleeved with:
the central spray gun is in clearance fit with the ignition gun, and a first methane inlet is formed in the side wall of the central spray gun;
the central air pipe is in clearance fit with the central spray gun, and a first air inlet is formed in the side wall of the central air pipe;
the main spray gun is in clearance fit with the central air pipe, and a second methane inlet is formed in the side wall of the main spray gun;
the main spray gun is internally provided with a first swirler, and the first swirler is sleeved outside the nozzle end of the central air pipe;
the secondary air pipe is in clearance fit with the main spray gun, and a second air inlet is formed in the side wall of the secondary air pipe;
a second swirler is further arranged inside the secondary air pipe and sleeved outside the nozzle end of the main spray gun;
the burner is sequentially supplied with advection biogas from a central spray gun, advection air from a central air pipe, rotational flow biogas from a main spray gun and rotational flow air from a secondary air pipe from the center to the periphery, mixed gas surrounds the outer side of an electric spark and generates flame after being ignited, a backflow area can be formed around the flame, and the mixed gas is preheated by heat of entrainment high-temperature smoke gas so as to ensure continuous combustion of the mixed gas.
Furthermore, the secondary air pipe comprises a Venturi pipe, and the Venturi pipe is fixedly assembled at the nozzle end of the secondary air pipe.
Furthermore, the flame detector is inserted and fixed on the secondary air pipe, and the detection end of the flame detector is positioned on the inner side of the Venturi pipe.
Furthermore, a plurality of through holes are formed in the side wall of the central spray gun in a circumferential mode and are close to the outlet end.
Furthermore, the diameters of the first methane inlet, the first air inlet, the second methane inlet and the second air inlet are sequentially increased.
Furthermore, a flange used for being assembled with the boiler body is arranged on the outer side of the secondary air pipe.
Compared with the prior art, the utility model has the following beneficial effects: the utility model relates to a novel methane low-nitrogen burner,
1. the central spray gun provides support for the ignition gun, replaces a sleeve of the ignition gun, and is easy to ignite as methane and air are mixed to surround electric sparks, so that the ignition reliability of the burner is improved, and the ignition with high success rate is ensured;
2. the resistance loss is reduced under the same rotational flow strength by adopting a mode of supplying methane and combustion-supporting air in a layered and graded manner and simultaneously performing rotational flow;
the inner and outer backflow regions are formed while the swirl is used for enhancing mixing, so that flame can be stabilized, the biogas combustion efficiency is improved, and the formation of pollutants is reduced;
3. the arrangement mode of the ignition gun and the flame detector does not need to open an ignition fire probing hole on the blade of the first swirler, keeps the integrity of the first swirler and avoids influencing the biogas swirling flow.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of a novel biogas low-nitrogen burner of the utility model;
FIG. 2 is a schematic structural diagram of a central lance of the novel biogas low-nitrogen burner of the utility model;
FIG. 3 is a structural side view of a first swirler of the novel methane low-nitrogen burner;
FIG. 4 is a front view of the first cyclone of the novel biogas low-nitrogen burner of the utility model;
in the figure: 1. an ignition gun; 2. a central spray gun; 3. a central air duct; 4. a main spray gun; 5. a secondary air duct; 6. a flame detector; 7. a first swirler; 8. a second swirler; 9. a venturi tube.
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.
Referring to fig. 1-4, the present invention provides the following technical solutions:
example 1:
a novel biogas low-nitrogen burner is assembled on a boiler body and comprises an ignition gun 1;
the outer side of the ignition gun 1 is sequentially coaxially sleeved with:
the central spray gun 2 is in clearance fit with the ignition gun 1, and a first methane inlet is formed in the side wall of the central spray gun;
the central air pipe 3 is in clearance fit with the central spray gun 2, and a first air inlet is formed in the side wall of the central air pipe;
the main spray gun 4 is in clearance fit with the central air pipe 3, and a second methane inlet is formed in the side wall of the main spray gun;
a first swirler 7 is further arranged inside the main spray gun 4, and the first swirler 7 is sleeved outside the nozzle end of the central air pipe 3;
the secondary air pipe 5 is in clearance fit with the main spray gun 4, and a second air inlet is formed in the side wall of the secondary air pipe;
a second swirler 8 is further arranged inside the secondary air pipe 5, and the second swirler 8 is sleeved outside the nozzle end of the main spray gun 4;
the burner is sequentially supplied with advection biogas from a central spray gun 2, advection air from a central air pipe 3, rotational flow biogas from a main spray gun 4 and rotational flow air from a secondary air pipe 5 from the center to the periphery, mixed gas surrounds the outer side of an electric spark and generates flame after being ignited, a backflow zone can be formed around the flame, and the mixed gas is preheated by absorbing heat of high-temperature flue gas so as to ensure continuous combustion of the mixed gas.
Referring to the attached drawings of the specification, fig. 1-4, in the embodiment, a central spray gun 2 is used for replacing a sleeve of an ignition gun 1 to provide support for the ignition gun 1, biogas and air are mixed to surround electric sparks, ignition reliability of a combustor is achieved, and ignition with high success rate is guaranteed; the burner adopts a staged combustion mode of sectional air supply, so that the center is positioned in a biogas-rich area, and the combustion temperature is reduced due to insufficient oxygen in the center area, thereby reducing the generation of thermal nitrogen oxides; in addition, because the combustion center is in a reducing atmosphere, the generation of nitrogen oxides is also inhibited;
in addition, in the embodiment, the first cyclone 7 and the second cyclone 8 have the same rotating direction, the resistance loss is reduced under the same rotating flow strength, and the proper rotating flow strength can promote the mixing of the marsh gas and the air and stabilize the combustion, so the burn-out rate of the marsh gas can be improved, and the formation of pollutants is reduced.
Example 2:
the secondary air pipe is characterized by further comprising a Venturi tube 9, wherein the Venturi tube 9 is fixedly assembled at the nozzle end of the secondary air pipe 5.
Referring to the attached figure 1 of the specification, the embodiment is realized on the basis of the above embodiment, the characteristics of the burner are further defined, the venturi tube 9 is used for accelerating the smoke and fire injection speed of the secondary air pipe 5, and a backflow zone is formed under the combined action of the second swirler 8 to stabilize the flame, so that the biogas combustion efficiency is improved.
Example 3:
the flame detector 6 is inserted and fixed on the secondary air pipe 5, and the detection end of the flame detector 6 is positioned on the inner side of the Venturi tube 9.
Referring to the attached figure 1 of the specification, the embodiment is realized on the basis of the embodiment, the characteristics of the combustor are further limited, and the ignition condition of the biogas is monitored in real time through the flame detector 6, so that unnecessary resource waste is avoided, and potential safety hazards are avoided.
Example 4:
the side wall of the central spray gun 2 is provided with a plurality of through holes with the circumference and is close to the outlet end.
Referring to the attached figure 2 of the specification, the embodiment is realized on the basis of the above embodiment, the characteristics of the central spray gun 2 are further limited, the central spray gun 2 can also utilize a plurality of radial methane jet flows ejected from the through holes besides the axial methane jet flow, and the radial methane jet flows vertically eject into the transverse air flow, so that methane is diffused and mixed, the flame temperature at the center is uniform, the occurrence of local high temperature phenomenon is reduced, and the generation of nitrogen oxide is reduced.
Example 5:
the diameters of the first methane inlet, the first air inlet, the second methane inlet and the second air inlet are sequentially increased.
Referring to the attached figure 1 of the specification, the embodiment is realized on the basis of the embodiment, the characteristics of the combustor are further defined, and good staged combustion can be realized by setting and adjusting the flow of methane and air in each layer, so that the flame center is in a methane-rich area.
Example 6:
and a flange used for being assembled with the boiler body is arranged on the outer side of the secondary air pipe.
Referring to the attached figure 1 of the specification, the embodiment is realized on the basis of the embodiment, the characteristics of the combustor are further defined, and the secondary air pipe is fixedly assembled with the boiler body through a flange.
The working principle of the utility model is as follows:
1. the power supply is communicated, the ignition gun 1 is ignited, and the fuel valve and the air valve are opened;
2. flat flow biogas is supplied from a central spray gun 2, flat flow air is supplied from a central air pipe 3, rotational flow biogas is supplied from a main spray gun 4, rotational flow air is supplied from a secondary air pipe 5 in sequence from the center to the periphery, mixed gas surrounds the outer side of electric spark and generates flame after being ignited, a backflow area can be formed around the flame, and the mixed gas is preheated by absorbing the heat of high-temperature flue gas to ensure the continuous combustion of the mixed gas;
3. flame is sprayed outwards through the Venturi tube 9, a backflow area is formed outside the nozzle end of the secondary air pipe 5, the heat of high-temperature flue gas is sucked in an entrainment mode to maintain the temperature of air flow, and the stability of flame combustion is guaranteed;
4. by the method for realizing the staged combustion, the center is positioned in the biogas-rich area, and the combustion temperature is reduced due to insufficient oxygen in the center area, so that the generation of thermal nitrogen oxides is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A novel methane low-nitrogen burner is assembled on a boiler body and comprises an ignition gun;
the ignition gun is characterized in that the outer side of the ignition gun is sequentially and coaxially sleeved with:
the central spray gun is in clearance fit with the ignition gun, and a first methane inlet is formed in the side wall of the central spray gun;
the central air pipe is in clearance fit with the central spray gun, and a first air inlet is formed in the side wall of the central air pipe;
the main spray gun is in clearance fit with the central air pipe, and a second methane inlet is formed in the side wall of the main spray gun;
the main spray gun is internally provided with a first swirler, and the first swirler is sleeved outside the nozzle end of the central air pipe;
the secondary air pipe is in clearance fit with the main spray gun, and a second air inlet is formed in the side wall of the secondary air pipe;
a second swirler is further arranged inside the secondary air pipe and sleeved outside the nozzle end of the main spray gun;
the burner is sequentially supplied with advection biogas from a central spray gun, advection air from a central air pipe, rotational flow biogas from a main spray gun and rotational flow air from a secondary air pipe from the center to the periphery, mixed gas surrounds the outer side of an electric spark and generates flame after being ignited, a backflow area can be formed around the flame, and the mixed gas is preheated by heat of entrainment high-temperature smoke gas so as to ensure continuous combustion of the mixed gas.
2. The novel biogas low-nitrogen burner as claimed in claim 1, characterized in that: still include venturi, venturi fixed assembly in the spout end of secondary air pipe.
3. The novel biogas low-nitrogen burner as claimed in claim 2, characterized in that: the flame detector is inserted and fixed on the secondary air pipe, and the detection end of the flame detector is positioned on the inner side of the Venturi tube.
4. The novel biogas low-nitrogen burner as claimed in claim 1, characterized in that: the side wall of the central spray gun is provided with a plurality of through holes in a circumferential manner and is close to the nozzle end of the central spray gun.
5. The novel biogas low-nitrogen burner as claimed in claim 1, characterized in that: the diameters of the first methane inlet, the first air inlet, the second methane inlet and the second air inlet are sequentially increased.
6. The novel biogas low-nitrogen burner as claimed in claim 1, characterized in that: and a flange used for being assembled with the boiler body is arranged on the outer side of the secondary air pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005557.9U CN216346263U (en) | 2021-12-02 | 2021-12-02 | Novel marsh gas low-nitrogen burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005557.9U CN216346263U (en) | 2021-12-02 | 2021-12-02 | Novel marsh gas low-nitrogen burner |
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| CN216346263U true CN216346263U (en) | 2022-04-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117028986A (en) * | 2023-08-31 | 2023-11-10 | 南京正本环境工程有限公司 | Mixed fuel methane burner igniting gun and control system |
| CN117072962A (en) * | 2023-08-30 | 2023-11-17 | 南京正本环境工程有限公司 | Mixed fuel methane burner |
| CN117028986B (en) * | 2023-08-31 | 2024-04-26 | 南京正本环境工程有限公司 | Mixed fuel methane burner igniting gun and control system |
-
2021
- 2021-12-02 CN CN202123005557.9U patent/CN216346263U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072962A (en) * | 2023-08-30 | 2023-11-17 | 南京正本环境工程有限公司 | Mixed fuel methane burner |
| CN117072962B (en) * | 2023-08-30 | 2024-04-05 | 南京正本环境工程有限公司 | Mixed fuel methane burner |
| CN117028986A (en) * | 2023-08-31 | 2023-11-10 | 南京正本环境工程有限公司 | Mixed fuel methane burner igniting gun and control system |
| CN117028986B (en) * | 2023-08-31 | 2024-04-26 | 南京正本环境工程有限公司 | Mixed fuel methane burner igniting gun and control system |
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