CN215294905U - Asymmetric low NOx nozzle - Google Patents
Asymmetric low NOx nozzle Download PDFInfo
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- CN215294905U CN215294905U CN202121528125.3U CN202121528125U CN215294905U CN 215294905 U CN215294905 U CN 215294905U CN 202121528125 U CN202121528125 U CN 202121528125U CN 215294905 U CN215294905 U CN 215294905U
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Abstract
The utility model relates to an asymmetric low NOx nozzle. The utility model discloses a nozzle head, air gas collecting channel, gas pipe and central tuber pipe, air gas collecting channel are connected with the nozzle head, and the gas pipe is installed overhead at the nozzle, and central tuber pipe is installed on the gas pipe. The burner head is installed on the furnace body through the burner head installation flange, the gas pipe is installed on the burner head through the gas pipe fixing flange, and the air gas collecting hood is connected with the burner head through the burner head connection flange. The gas pipe is directly arranged on the burner head without passing through a high-temperature air circulation cavity, so that the protection of a refractory material is not needed, the improved gas pipe is reliable and stable in use, and the service life is prolonged; in addition, the improved structure can be provided with a plurality of gas pipes and gas nozzles, especially when the gas amount is large, the air and the gas can be dispersed and mixed for combustion, the combustion is sufficient, a wider flame radiation surface can be formed, the high temperature area of the flame is reduced, and the NOx is reduced.
Description
Technical Field
The utility model relates to an asymmetric low NOx nozzle belongs to gas nozzle technical field, is applicable to the industrial furnace kiln of trades such as iron and steel, coloured, machinery.
Background
At present, most of direct flame burners are of a symmetrical structure, namely a gas outlet is positioned in the center of an air outlet, the air outlet is uniformly distributed around the gas pipe serving as the center, the flame temperature of the structure is high, the content of NOx in combustion products is high, the environment is greatly polluted, and the application of the burner with low NOx emission in an industrial furnace is a future development trend. However, most of the existing burners with low NOx emission have complicated structures, and the popularization and the application of the burners in industrial kilns are influenced.
The application is an improvement of an original asymmetric burner (patent application No. CN201922046640.7, publication No. CN211424387U), wherein a cooling pipe of a cooling and gas pipe is wrapped with a layer of refractory protection lining through an air circulation cavity.
In the practical application process, the cooling pipe and the refractory material protection lining wrapped on the cooling pipe are heated to expand, the expansion coefficients of the cooling pipe and the refractory material are different, the refractory material lining is cracked and falls off easily, and after the lining is cracked and falls off, the cooling pipe is deformed and burnt by high temperature and corrosion, so that the service life is influenced. And when the burner power is higher, the gas pipe adopts single pipe setting, and the gas should not mix with the air, causes incomplete combustion, extravagant energy consumption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a reasonable in structural design's asymmetric low NOx nozzle to improve life, reduce the burning flame temperature, reduce NOx and discharge, improve heating quality.
The utility model provides a technical scheme that above-mentioned problem adopted is: the asymmetric low NOx burner is structurally characterized in that: the burner comprises a burner head, an air gas collecting hood, a gas pipe and a central air pipe, wherein the air gas collecting hood is connected with the burner head, the gas pipe is arranged on the burner head, and the central air pipe is arranged on the gas pipe.
The burner is characterized by further comprising a gas pipe fixing flange, a burner head mounting flange and a burner head connecting flange, wherein the burner head is mounted on the furnace body through the burner head mounting flange, the gas pipe is mounted on the burner head through the gas pipe fixing flange, and the air gas collecting hood is connected with the burner head through the burner head connecting flange.
Furthermore, the burner head comprises a burner head shell, a burner core, an air channel and a gas channel, wherein the burner core is arranged in the burner head shell, and the air channel and the gas channel are both arranged on the burner core.
Furthermore, an ignition gun mounting seat and a flame monitoring head mounting seat are further arranged on the burner head shell.
Further, the gas passageway includes this section of gas passageway and gas passageway expansion section, this section of gas passageway and gas passageway expansion section intercommunication, the gas pipe is installed in this section of gas passageway.
Furthermore, the air gas-collecting hood comprises a gas-collecting hood shell, a gas-collecting hood cavity and a gas-collecting hood lining, wherein the gas-collecting hood lining is arranged in the gas-collecting hood shell, the gas-collecting hood cavity is arranged on the gas-collecting hood lining, and the gas-collecting hood cavity is communicated with the air channel.
Further, the gas pipe comprises a gas pipe body and a gas pipe inlet, and the gas pipe inlet is formed in the gas pipe body.
Furthermore, the number of the air channels is n, n is within the range of 1-4, the cross section of each air channel is circular, key groove-shaped, half moon-shaped, oval or fan-ring-shaped, the two ends of each air channel are respectively provided with an air channel inlet and an air channel outlet, the air channel inlets are communicated with the air collecting hood, and the air channel outlets are communicated with the furnace body.
Further, the number of the gas channels is m, the range of m is not less than 1 and not more than 3, the two ends of the gas channels are respectively a gas channel inlet and a gas channel outlet, the gas pipe is arranged at the gas channel inlet, and the gas channel outlet is communicated with the furnace body.
Furthermore, the included angle between the central axis of the gas channel and the burner head is theta, the theta is in the range of 0-20 degrees, the included angle between the expanding section of the gas channel is alpha, the alpha is in the range of 12-40 degrees, the length of the expanding section of the gas channel is l, the diameter of one end of the expanding section of the gas channel is d, and the l is in the range of d-3 d.
Compared with the prior art, the utility model has the advantages of it is following: in the improved structure, the gas pipe is directly arranged on the burner head without passing through a high-temperature air circulation cavity, so that the protection of a refractory material is not needed, the improved structure is reliable and stable in use, and the service life is prolonged; in addition, the improved structure can be provided with a plurality of gas pipes and gas nozzles, especially when the gas amount is large, the air and the gas can be dispersed and mixed for combustion, the combustion is sufficient, a wider flame radiation surface can be formed, the high temperature area of the flame is reduced, and the NOx is further reduced.
Drawings
Fig. 1 is a schematic sectional view of a burner head according to an embodiment of the present invention.
Fig. 2 is a schematic sectional view of a burner head according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structure diagram of an asymmetric low NOx burner according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a front view of an asymmetric low NOx burner according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is circular and n =1 and m = 1.
Fig. 6 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is circular and n =1 and m = 2.
Fig. 7 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is a key groove shape and n =1 and m = 1.
Fig. 8 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is a key groove shape and n =1 and m = 2.
Fig. 9 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air channel is half-moon-shaped, and n =1 and m = 1.
Fig. 10 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air channel is half-moon-shaped, and n =1 and m = 2.
Fig. 11 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is circular and n =2 and m = 1.
Fig. 12 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is circular and n =2 and m = 2.
Fig. 13 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is elliptical and n =2 and m = 1.
Fig. 14 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is elliptical and n =2 and m = 2.
Fig. 15 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is a fan ring shape, and n =2 and m = 1.
Fig. 16 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is a sector ring shape, and n =2 and m = 2.
Fig. 17 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is circular and n =3 and m = 1.
Fig. 18 is a schematic structural view of a burner head according to an embodiment of the present invention, in which the cross section of the air passage is circular and n =3 and m = 2.
In the figure: a burner head 1, an air gas-collecting hood 2, a gas pipe 3, a central air pipe 4, a gas pipe fixing flange 5, a burner head mounting flange 6, a burner head connecting flange 7,
A burner head shell 11, a burner core 12, an air channel 13, a gas channel 14, an ignition gun mounting seat 15, a flame monitoring head mounting seat 16,
A gas-collecting hood shell 21, a gas-collecting hood cavity 22, a gas-collecting hood lining 23,
A gas pipe body 31, a gas pipe inlet 32,
A gas channel body section 141, a gas channel expanding section 142,
An air passage inlet 13a, an air passage outlet 13b,
A gas channel inlet 14a, a gas channel outlet 14 b.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 18, it should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essence, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, in the present specification, if there are terms such as "upper", "lower", "left", "right", "middle" and "one", they are used for clarity of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.
The asymmetric low NOx burner in this embodiment, including burner head 1, air gas collecting channel 2, gas pipe 3, central tuber pipe 4, gas pipe mounting flange 5, burner head mounting flange 6 and burner head flange 7, air gas collecting channel 2 is connected with burner head 1, gas pipe 3 is installed on burner head 1, central tuber pipe 4 is installed on gas pipe 3, burner head 1 is installed on the furnace body through burner head mounting flange 6 under the normal conditions, one side lower part at burner head 1 is installed through burner head flange 7 to air gas collecting channel 2, gas pipe 3 is installed on one side upper portion at burner head 1 through gas pipe mounting flange 5.
The burner head 1 in the embodiment comprises a burner head shell 11, a burner core 12, an air channel 13 and a gas channel 14, wherein the burner core 12 is arranged in the burner head shell 11, the air channel 13 and the gas channel 14 are both arranged on the burner core 12, and the burner head shell 11 is further provided with an ignition gun mounting seat 15 and a flame monitoring head mounting seat 16.
In the embodiment, the number of the air channels 13 is n, the range of n is 1-4, the cross section of the air channel 13 is circular, key groove-shaped, half moon-shaped, oval or fan-ring-shaped, the two ends of the air channel 13 are respectively an air channel inlet 13a and an air channel outlet 13b, the air channel inlet 13a is communicated with the air collecting hood 2, and the air channel outlet 13b is communicated with the furnace body.
In the embodiment, the number of the gas channels 14 is m, the range of m is more than or equal to 1 and less than or equal to 3, two ends of the gas channel 14 are respectively a gas channel inlet 14a and a gas channel outlet 14b, the gas pipe 3 is arranged at the gas channel inlet 14a, and the gas channel outlet 14b is communicated with the furnace body.
The gas duct 14 in this embodiment includes a gas duct body section 141 and a gas duct expanded section 142, the gas duct body section 141 communicates with the gas duct expanded section 142, and the gas pipe 3 is installed in the gas duct body section 141.
In this embodiment, an included angle between the gas channel 14 and the central axis of the burner head 1 is θ, θ is in a range of 0 ° to 20 °, α is an included angle of the gas channel expansion section 142, α is in a range of 12 ° to 40 °, length of the gas channel expansion section 142 is l, diameter of one end of the gas channel expansion section 142 is d, l is in a range of d to 3d, and d is the minimum diameter of the gas channel expansion section 142.
The air gas-collecting channel 2 in this embodiment includes a gas-collecting channel casing 21, a gas-collecting channel cavity 22 and a gas-collecting channel liner 23, the gas-collecting channel liner 23 is disposed in the gas-collecting channel casing 21, the gas-collecting channel cavity 22 is disposed on the gas-collecting channel liner 23, and the gas-collecting channel cavity 22 is communicated with the air channel 13.
The gas pipe 3 in this embodiment includes a gas pipe body 31 and a gas pipe inlet 32, the gas pipe inlet 32 is provided on the gas pipe body 31, and the gas pipe body 31 is installed in the air passage 13.
In the improved structure, the gas pipe 3 is directly arranged on the burner head 1 without passing through a high-temperature air circulation cavity, so that the protection of a refractory material is not needed, the improved structure is reliable and stable in use, and the service life is prolonged; in addition, the improved structure can be provided with a plurality of gas pipes 3 and gas nozzles, especially when the gas amount is large, the air and the gas can be dispersed and mixed for combustion, the combustion is sufficient, a wider flame radiation surface can be formed, the high temperature area of the flame is reduced, and the NOx is further reduced.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. An asymmetric low NOx nozzle is characterized in that: the burner is characterized by comprising a burner head (1), an air gas collecting hood (2), a gas pipe (3) and a central air pipe (4), wherein the air gas collecting hood (2) is connected with the burner head (1), the gas pipe (3) is installed on the burner head (1), and the central air pipe (4) is installed on the gas pipe (3).
2. The asymmetric low NOx burner of claim 1, wherein: still include gas pipe mounting flange (5), nozzle head mounting flange (6) and nozzle head flange (7), install on the furnace body through nozzle head mounting flange (6) burner head (1), gas pipe (3) are installed on nozzle head (1) through gas pipe mounting flange (5), air gas collecting channel (2) are connected with nozzle head (1) through nozzle head flange (7).
3. The asymmetric low NOx burner of claim 1, wherein: the burner head (1) comprises a burner head shell (11), a burner core (12), an air channel (13) and a gas channel (14), the burner core (12) is arranged in the burner head shell (11), and the air channel (13) and the gas channel (14) are both arranged on the burner core (12).
4. The asymmetric low NOx burner of claim 3, wherein: an ignition gun mounting seat (15) and a flame monitoring head mounting seat (16) are further arranged on the burner head shell (11).
5. The asymmetric low NOx burner of claim 3, wherein: the gas channel (14) comprises a gas channel body section (141) and a gas channel expansion section (142), the gas channel body section (141) is communicated with the gas channel expansion section (142), and the gas pipe (3) is installed in the gas channel body section (141).
6. The asymmetric low NOx burner of claim 1, wherein: the air gas-collecting hood (2) comprises a gas-collecting hood shell (21), a gas-collecting hood cavity (22) and a gas-collecting hood lining (23), wherein the gas-collecting hood lining (23) is arranged in the gas-collecting hood shell (21), the gas-collecting hood cavity (22) is arranged on the gas-collecting hood lining (23), and the gas-collecting hood cavity (22) is communicated with the air channel (13).
7. The asymmetric low NOx burner of claim 1, wherein: the gas pipe (3) comprises a gas pipe body (31) and a gas pipe inlet (32), and the gas pipe inlet (32) is formed in the gas pipe body (31).
8. The asymmetric low NOx burner of claim 3, wherein: the number of the air channels (13) is n, n is within the range of 1-4, the cross section of each air channel (13) is circular, key groove-shaped, half moon-shaped, oval or fan-ring-shaped, the two ends of each air channel (13) are respectively provided with an air channel inlet (13 a) and an air channel outlet (13 b), the air channel inlets (13 a) are communicated with the air collecting hood (2), and the air channel outlets (13 b) are communicated with the furnace body.
9. The asymmetric low NOx burner of claim 3, wherein: the number of the gas channels (14) is m, the range of m is more than or equal to 1 and less than or equal to 3, two ends of each gas channel (14) are respectively provided with a gas channel inlet (14 a) and a gas channel outlet (14 b), the gas pipe (3) is arranged at the gas channel inlet (14 a), and the gas channel outlet (14 b) is communicated with the furnace body.
10. The asymmetric low NOx burner of claim 5, wherein: the included angle between the central axis of the gas channel (14) and the burner head (1) is theta, the theta is in the range of 0-20 degrees, the included angle between the gas channel expansion section (142) is alpha, the alpha is in the range of 12-40 degrees, the length of the gas channel expansion section (142) is l, the diameter of one end of the gas channel expansion section (142) is d, and the l is in the range of d-3 d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121528125.3U CN215294905U (en) | 2021-07-05 | 2021-07-05 | Asymmetric low NOx nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121528125.3U CN215294905U (en) | 2021-07-05 | 2021-07-05 | Asymmetric low NOx nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215294905U true CN215294905U (en) | 2021-12-24 |
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ID=79520975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121528125.3U Active CN215294905U (en) | 2021-07-05 | 2021-07-05 | Asymmetric low NOx nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215294905U (en) |
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2021
- 2021-07-05 CN CN202121528125.3U patent/CN215294905U/en active Active
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