CN211260793U - Secondary air low-nitrogen combustor - Google Patents
Secondary air low-nitrogen combustor Download PDFInfo
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- CN211260793U CN211260793U CN201921159113.0U CN201921159113U CN211260793U CN 211260793 U CN211260793 U CN 211260793U CN 201921159113 U CN201921159113 U CN 201921159113U CN 211260793 U CN211260793 U CN 211260793U
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Abstract
The utility model relates to a low nitrogen burner technical field, in particular to overgrate air low nitrogen burner, including an air supply section of thick bamboo, a premix section of thick bamboo, mounting flange, gas pipeline, support flange, combustion head, a premix section of thick bamboo be fixed in on an air supply section of thick bamboo wall through supporting the flange, the tip of a premix section of thick bamboo of combustion head fixed connection, gas pipeline one end stretches into the premix passageway in the premix section of thick bamboo, the gas pipeline other end is connected on the interface of an air supply section of thick bamboo, mounting flange fixed mounting is on the outer wall of an air supply section of thick bamboo, gas pipeline's front end fixed mounting horn mouth, an air supply section of thick bamboo and premix section of thick bamboo between the cavity form the overgrate air passageway, combustion head outer wall and air supply section of thick. The utility model has the advantages that: potential safety hazards caused by metal fiber blockage, coking and the like on the surface of the combustor are avoided; because the requirement on the cleanness of combustion air is not high, an air filter is omitted, the air inlet efficiency is increased, and the motor power of the fan is reduced.
Description
Technical Field
The utility model relates to a low NOx burner technical field, in particular to overgrate air low NOx burner.
Background
NOx is an important atmospheric pollutant and an important factor for acid rain, and is one of the pioneers of forming PM2.5 because it can form a colloid with the moisture in the air, thereby forming haze. With the increasing of environmental protection treatment strength and the deepening of energy-saving and emission-reducing policies in China, the requirement on NOx emission indexes is gradually improved, the requirement of national standard 100PPM can not be clearly executed, the mandatory requirement that the NOx emission is less than 50PPM is provided for a gas boiler, and the target requirement that the NOx emission of the gas boiler is reduced to below 15PPM before 2017 is also provided. Therefore, the industry is actively exploring the implementation method. At present, although the existing burners with NOx emission less than 30ppm are on the market internationally and are mostly realized by adopting a flue gas recirculation post-treatment measure, the method is difficult to popularize because the method has high energy consumption during implementation and is easy to cause vibration to bring potential safety hazards.
Disclosure of Invention
In order to solve the problem of the prior art, the utility model provides a multiplicable efficiency of admitting air reduces the low nitrogen burner of overgrate air of the motor power of fan.
The technical scheme of the utility model as follows:
the utility model provides a overgrate air low NOx burner, includes a supply air section of thick bamboo, mixes a section of thick bamboo, mounting flange, gas pipeline, support flange, combustion head in advance, mix a section of thick bamboo be fixed in on the supply air section of thick bamboo wall through supporting the flange, combustion head fixed connection mix the tip of a section of thick bamboo in advance, gas pipeline one end stretch into the pre-mixing passageway in the section of thick bamboo in advance, the gas pipeline other end is connected on the interface of supply air section of thick bamboo, mounting flange fixed mounting on the outer wall of supply air section of thick bamboo, the front end fixed mounting horn mouth of gas pipeline, supply air section of thick bamboo and mix a cavity formation overgrate air passageway between the section of thick bamboo, combustion head outer wall and supply air section of thick bamboo.
The gas pipeline is closed at one end face extending into the premixing barrel, and a plurality of gas spray holes which are uniformly distributed are formed in the outer wall, close to the closed end face, of the gas pipeline.
The utility model provides a beneficial effect that technical scheme brought is:
the utility model discloses have concurrently and mix burning and diffusion burning's advantage in advance, make and mix flame staged combustion in advance. Compared with a premixing burner with surface combustion, the potential safety hazard caused by metal fiber blockage, coking and the like on the surface of the burner is avoided; because the requirement on the cleanness of combustion air is not high, an air filter is omitted, the air inlet efficiency is increased, and the motor power of the fan is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the secondary air low-nitrogen combustor comprises an air supply cylinder 1, a premixing cylinder 2, a mounting flange 3, a gas pipeline 4, a supporting flange 5 and a combustion head 6, wherein the premixing cylinder 2 is fixed on the wall of the air supply cylinder 1 through the supporting flange 5, the combustion head 6 is fixedly connected with the end part of the premixing cylinder 2, one end of the gas pipeline 4 extends into a premixing channel 22 in the premixing cylinder 2, the other end of the gas pipeline 4 is connected to a connector of the air supply cylinder 1, the mounting flange 3 is fixedly installed on the outer wall of the air supply cylinder 1, a horn mouth 21 is fixedly installed at the front end of the gas pipeline 4, a secondary air channel 11 is formed in a cavity between the air supply cylinder 1 and the premixing cylinder 2, and a cooling air channel 12 is formed in a cavity between the outer wall of the combustion head 6 and the inner wall of the air supply cylinder 1.
The end face of one end of the gas pipeline 4 extending into the premixing barrel 2 is closed, and a plurality of gas spray holes which are uniformly distributed are formed in the outer wall, close to the closed end face, of the gas pipeline 4.
Combustion air provided by the fan enters from the front end of the air supply barrel 1; a part of air in the air supply barrel 1 enters the premixing barrel 2 through the bell mouth 21 to be mixed with the fuel gas; another part of the air enters the secondary air passage 11 to participate in combustion as secondary air. One end of a gas pipeline 4 extends into the premixing barrel 2, and the other end of the gas pipeline is connected with the air supply barrel 1 through a connector; one end of the premixing cylinder 2 is extended, the end surface is closed, and the outer wall close to the end surface is provided with a plurality of evenly distributed gas jet holes 41. The gas sprayed from the gas spray holes 41 is mixed with the air in the premixing cylinder 2 and then is fed into the combustion head 6 through the premixing passage 22, the mixed gas of the gas and the air is sprayed from the front end of the combustion head 6 to form flame, and part of the secondary air fed through the secondary air passage 11 is uniformly fed into the flame center through the combustion head 6 and is fed into the secondary air in the flame, so that the temperature in the flame can be reduced, and the generation amount of NOx is reduced. The other part flows to the outer edge of the flame through the cooling air channel 12, the cooling air channel 12 is formed between the outer wall of the combustion head 6 and the inner wall of the air supply cylinder 1, the air in the cooling air channel 12 can reduce the temperature of the combustion head 6 on the one hand, the cooling effect is achieved, the service life of the combustion head 6 is prolonged, and on the other hand, the air participates in the combustion of the outer edge of the flame, so that the combustion is more sufficient, and the generation of CO is avoided.
The front end of the premixing barrel 2 is provided with a bell mouth 21, and under the action of the bell mouth 21, the flow velocity of mixed gas in the premixing channel 22 is increased, so that the tempering phenomenon is prevented. The gas spray holes 41 arranged on the pipe wall of the gas pipeline 4 are vertical to the flow direction of combustion-supporting air, so that the air and the gas collide violently, and the mixing effect is enhanced.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (2)
1. The utility model provides a overgrate air low NOx burner, its characterized in that, includes a supply air section of thick bamboo, mixes a section of thick bamboo, mounting flange, gas pipeline, support flange, combustion head in advance, mix a section of thick bamboo in advance and be fixed in on the supply air section of thick bamboo wall through supporting the flange, combustion head fixed connection mix the tip of a section of thick bamboo in advance, gas pipeline one end stretch into the passageway in advance of mixing in advance, the gas pipeline other end is connected on the interface of supply air section of thick bamboo, mounting flange fixed mounting on the outer wall of supply air section of thick bamboo, the front end fixed mounting horn mouth of gas pipeline, supply air section of thick bamboo and mix a cavity formation overgrate air passageway between the section of thick bamboo in advance, combustion head outer wall and supply air section of thick.
2. The overfire air low-nitrogen burner as claimed in claim 1, wherein said gas duct has a closed end surface at one end thereof extending into said premixing cylinder, and a plurality of uniformly distributed gas injection holes are formed in an outer wall of said gas duct adjacent to said closed end surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921159113.0U CN211260793U (en) | 2019-07-18 | 2019-07-18 | Secondary air low-nitrogen combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921159113.0U CN211260793U (en) | 2019-07-18 | 2019-07-18 | Secondary air low-nitrogen combustor |
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| Publication Number | Publication Date |
|---|---|
| CN211260793U true CN211260793U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921159113.0U Active CN211260793U (en) | 2019-07-18 | 2019-07-18 | Secondary air low-nitrogen combustor |
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| CN (1) | CN211260793U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797406A (en) * | 2021-02-25 | 2021-05-14 | 佛山市金之鑫环保科技有限公司 | High-speed energy-saving environment-friendly gas burner and combustion method |
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2019
- 2019-07-18 CN CN201921159113.0U patent/CN211260793U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797406A (en) * | 2021-02-25 | 2021-05-14 | 佛山市金之鑫环保科技有限公司 | High-speed energy-saving environment-friendly gas burner and combustion method |
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