CN215637143U - Staged combustion low-nitrogen burner - Google Patents
Staged combustion low-nitrogen burner Download PDFInfo
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- CN215637143U CN215637143U CN202121168499.9U CN202121168499U CN215637143U CN 215637143 U CN215637143 U CN 215637143U CN 202121168499 U CN202121168499 U CN 202121168499U CN 215637143 U CN215637143 U CN 215637143U
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Abstract
The utility model relates to a staged combustion low-nitrogen burner, which comprises a combustion-supporting air duct, a fuel gas cylinder and a combustion-supporting air grading cylinder which are coaxially arranged, wherein the combustion-supporting air duct is sleeved outside the fuel gas cylinder and the combustion-supporting air grading cylinder; the tail end of the combustion-supporting air cylinder is provided with a combustion-supporting air inlet, and the tail end of the gas cylinder is provided with a gas inlet; the multistage air outlets are sequentially formed in the combustion-supporting air classifying cylinder from the tail to the head, the first-stage air outlet is arranged at the tail end of the combustion-supporting air classifying cylinder and is parallel to the gas cylinder, and the second-stage air outlet and the third-stage air outlet are sequentially arranged along the axial direction of the gas cylinder. The burner is provided with multi-stage combustion-supporting air, multi-stage different shade combustion is adopted, the fuel concentration is reduced continuously in a grading manner, the combustion temperature at the burner is reduced, the emission of thermal NOx is reduced, the gas combustion is more sufficient, and the environmental pollution is reduced.
Description
Technical Field
The utility model relates to the technical field of burners, in particular to a staged combustion low-nitrogen burner.
Background
The main flow structure of the existing lithium salt acidification kiln heating process is hot blast stove smoke heating, hot smoke generated by burning fuel in the hot blast stove is mainly sent into a jacket between a heat preservation cover and a cylinder body in the cover, the cylinder body is conducted and heat exchanged by using the smoke, then the material is heated, the material in the cylinder body is heated by the smoke, the material is heated, and the low-temperature smoke is absorbed by the smoke and then is discharged into the atmosphere through a chimney after reaching the standard along with the treatment of system equipment. Application practice shows that the heating process does not achieve expected ideal use effects, such as low thermal efficiency, high energy consumption, uneven temperature distribution, insensitive temperature adjustment and control, limited adjustment range, small yield and quality improvement space and the like.
In order to increase the thermal efficiency of the acidification kiln, burners (also called burners) are used to heat the outer wall of the acidification kiln directly in the jacket. The acidification kiln is uniformly heated in the rotation process, so that the temperature distribution of the acidification kiln is uniform. The temperature of the acidification kiln can be controlled by controlling the flame size of the burner, the temperature regulation is relatively sensitive, and the regulation range is large. In order to comply with increasingly strict environmental requirements and reduce atmospheric pollution and energy waste, it is urgent to design a burner with more sufficient combustion.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems in the prior art, the utility model provides the staged combustion low-nitrogen burner, so that the gas can be combusted more sufficiently, the environmental pollution is reduced, and the energy is fully utilized.
The technical scheme for solving the technical problems is as follows:
the classified combustion low-nitrogen burner comprises a combustion-supporting air duct, a gas cylinder and a combustion-supporting air classifying cylinder which are coaxially arranged, wherein the combustion-supporting air duct is sleeved outside the gas cylinder and the combustion-supporting air classifying cylinder; the tail end of the combustion-supporting air barrel is provided with a combustion-supporting air inlet, and the tail end of the fuel gas barrel is provided with a fuel gas inlet; the combustion-supporting air classifying cylinder is sequentially provided with multistage air outlets from the tail part to the head part, wherein the first-stage air outlet is arranged at the tail end of the combustion-supporting air classifying cylinder and is parallel to the gas cylinder, and the second-stage air outlet and the third-stage air outlet are sequentially arranged along the axial direction of the gas cylinder.
The utility model has the beneficial effects that: gas fuel, such as natural gas, is introduced into a gas inlet of the gas cylinder, and combustion-supporting air is introduced into a combustion-supporting air inlet of the combustion-supporting air cylinder. A primary mixing cavity is formed at the primary air outlet, and after the fuel gas is mixed with the combustion-supporting air at the primary air outlet in the primary mixing cavity and ignited, stable combustion is started; the initial stage flame of igniteing is less, along with the constantly increasing of nozzle load, and the gas volume increase, fuel flow to second level air outlet and third level air outlet department in proper order, and fuel constantly mixes and carries out the staged combustion with combustion-supporting wind in the second grade mixing chamber that second level air outlet department formed and the tertiary mixing chamber that third level air outlet department formed, finally forms the head end of reliable and stable flame blowout nozzle to the outer wall to the acidizing kiln heats. The burner provided by the utility model has the advantages that on the basis of stable combustion, reasonable multi-stage combustion-supporting air is allocated, the burner burns gas in multi-stage different concentration, the fuel concentration is reduced continuously in stages, the combustion temperature at the burner is reduced, the thermal NOx emission is reduced, the gas is combusted more fully, and the environmental pollution is reduced.
On the basis of the technical scheme, the utility model can be further improved as follows.
Preferably, the combustion-supporting air classifying cylinder is further provided with a fourth-stage air outlet, the fourth-stage air outlet is arranged at the head end of the combustion-supporting air classifying cylinder, and the fourth-stage air outlet comprises a plurality of spiral grooves which are uniformly distributed on the periphery of the combustion-supporting air classifying cylinder.
The beneficial effect of adopting the above preferred scheme is: the helicla flute sets up in the tip periphery of the hierarchical section of thick bamboo of combustion-supporting wind, and as the fourth level air outlet of combustion-supporting wind, combustion-supporting wind passes through helicla flute blowout back and the flame in not burning complete gas mixture, firstly continue to provide oxygen for flame, make the gas combustion more abundant, secondly make the periphery of flame be the spiral, make flame more stable, concentrate, prevent to cause the interference to make flame slope to the direction of flame at the rotatory in-process of acidizing kiln, the influence is to the heating effect of acidizing kiln.
Preferably, annular steps which are gradually arranged are arranged along the circumferential direction of the combustion-supporting air classifying cylinder from the tail end to the head end of the combustion-supporting air classifying cylinder, and the second-stage air outlet and the third-stage air outlet are respectively arranged on different annular steps.
The beneficial effect of adopting the above preferred scheme is: the second level air outlet and the third level air outlet set up respectively on the annular ladder of difference, and the annular ladder is for gradually putting the setting, and the annular ladder at third level air outlet place is bigger than the annular ladder radial dimension at second level air outlet place promptly. The arrangement is that the air quantity is larger and larger along with the staged ejection of the combustion-supporting air, and the space of the mixing cavity of the next stage is larger than that of the mixing cavity of the previous stage, so that the gas and the combustion-supporting air are more fully mixed and more stably combusted. The second-stage air outlet and the third-stage air outlet are respectively arranged on different steps, so that the fuel gas is combusted in a grading manner, the combustion temperature at the burner is favorably reduced, the thermal NOx emission is reduced, and the environmental pollution is reduced; meanwhile, the fuel gas is mixed with the combustion-supporting air in a grading manner and is combusted, so that the fuel gas can be combusted more fully.
Preferably, the second-stage air outlet comprises a plurality of air outlet holes, and the air outlet holes are uniformly distributed in the radial direction of the combustion air classifying cylinder in an annular mode.
The beneficial effect of adopting the above preferred scheme is: the plurality of air outlet holes are uniformly distributed in an annular shape, so that combustion-supporting air can be uniformly sprayed out in the circumferential direction of the combustion-supporting air classifying cylinder, and flame is stable and not inclined.
Preferably, the third-stage air outlet comprises a plurality of air outlet holes, and the air outlet holes are uniformly distributed in the radial direction of the combustion air classifying cylinder in an annular manner.
The beneficial effect of adopting the above preferred scheme is: the plurality of air outlet holes are uniformly distributed in an annular shape, so that combustion-supporting air can be uniformly sprayed out in the circumferential direction of the combustion-supporting air classifying cylinder, and flame is stable and not inclined.
Preferably, the air outlet is obliquely arranged towards the axis of the combustion-supporting air classifying cylinder, and the air outlet direction of the air outlet faces the head end of the combustion-supporting air classifying cylinder.
The beneficial effect of adopting the above preferred scheme is: the combustion-supporting air direction is obliquely arranged and gathered towards the axis of the combustion-supporting air classifying cylinder, so that the combustion-supporting air direction can be better mixed with fuel gas, and thrust is generated to enable flame to be smoothly sprayed out of the combustion-supporting air cylinder.
Preferably, the head end of the gas cylinder extends into the tail end of the combustion-supporting air classifying cylinder, the head end of the gas cylinder is provided with a convex gas spray head, the gas spray head is provided with a plurality of gas spray holes which are arranged in an array manner, and the gas is sprayed out in a divergent manner through the gas spray holes.
The beneficial effect of adopting the above preferred scheme is: the gas nozzle sprays the gas in a divergent mode, so that the gas can be better mixed with the first-stage combustion-supporting air at the tail end of the combustion-supporting air classifying cylinder, and the ignition success rate is favorably improved.
Preferably, an ignition electrode is arranged between the combustion-supporting air cylinder and the gas cylinder, and the ignition end of the ignition electrode extends to the tail end of the combustion-supporting air grading cylinder.
The beneficial effect of adopting the above preferred scheme is: after the fuel gas and the combustion-supporting air are premixed in the primary mixing cavity, the ignition electrode ignites the fuel gas to form flame. The ignition end of the ignition electrode is arranged in the tail end of the combustion-supporting air classifying barrel, and the rest part of the ignition electrode is hidden in the combustion-supporting air barrel, so that the ignition electrode is protected, and the space is saved. Because the combustion-supporting air at normal temperature continuously flows through the combustion-supporting air duct, the temperature of the combustion-supporting air duct, the fuel gas duct and the ignition electrode can be continuously reduced, and the temperature protection effect is achieved.
Preferably, a flame detector is arranged between the combustion-supporting air duct and the gas cylinder, and the detection end of the flame detector detects the ignition condition through an air outlet at the tail end of the combustion-supporting air classifying cylinder.
The beneficial effect of adopting the above preferred scheme is: the flame detector is used for detecting whether the ignition is successful or not and sending the ignition condition to the ignition control system. And the flame detector is arranged between the combustion-supporting air cylinder and the gas cylinder so as to protect the flame detector.
Preferably, the head end of the combustion-supporting air duct is provided with a flame gathering cover, and the flame gathering cover is gradually reduced towards the flame spraying direction.
The beneficial effect of adopting the above preferred scheme is: the opening of the flame gathering cover is set to be in a gradually-reduced shape, and the flame is still kept concentrated after being sprayed out of the flame gathering cover, so that the flame is prevented from being interfered by the rotation process of the acidification kiln and deviating from the outer wall of the acidification kiln, and the heating efficiency is influenced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a partial cross-sectional view of the present invention;
fig. 3 is a partial sectional view of the combustion-supporting air classifying cylinder of the present invention in cooperation with a gas burner.
In the drawings, the components represented by the respective reference numerals are listed below:
1. combustion-supporting dryer, 101, combustion-supporting air inlet, 2, a gas cylinder, 201, gas inlet, 202, gas shower nozzle, 3, the hierarchical section of thick bamboo of combustion-supporting air, 301, first level air outlet, 302, second level air outlet, 303, third level air outlet, 304, fourth level air outlet, 4, ignition electrode, 5, UV flame detector, 6, hold up the flame cover.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
The embodiment provides a low nitrogen nozzle of fractional combustion, including the hierarchical section of thick bamboo 3 of the combustion-supporting dryer 1, the gas section of thick bamboo 2 and the combustion-supporting wind of coaxial setting, the fixed chucking mechanism that is provided with on the outer wall of combustion-supporting dryer 1 for with this nozzle fixed mounting in the jacket of acidizing kiln. The combustion-supporting air duct 1 is sleeved outside the gas cylinder 2 and the combustion-supporting air classifying cylinder 3, the head end of the gas cylinder 2 is communicated with the tail end of the combustion-supporting air classifying cylinder 3, the head end of the combustion-supporting air duct 1 is fixedly connected with the head end of the combustion-supporting air classifying cylinder 3, and the tail end of the combustion-supporting air duct 1 is hermetically connected with the tail end of the gas cylinder 2. The tail end of the combustion-supporting air duct 1 is provided with a combustion-supporting air inlet 101, and the tail end of the gas duct 2 is provided with a gas inlet 201. The combustion-supporting air classifying cylinder 3 is sequentially provided with multistage air outlets from the tail part to the head part, wherein the first-stage air outlet 301 is arranged at the tail end of the combustion-supporting air classifying cylinder 3 and is parallel to the gas cylinder 2 in the air outlet direction, and the second-stage air outlet 302 and the third-stage air outlet 303 are sequentially arranged along the axial direction of the gas cylinder 2.
When the combustion-supporting air duct is used, gas fuel, such as natural gas, is introduced into the gas inlet 201 of the gas cylinder 2, and combustion-supporting air is introduced into the combustion-supporting air inlet 101 of the combustion-supporting air duct 1. A primary mixing cavity is formed at the primary air outlet 301, and after the fuel gas is mixed with the combustion-supporting air at the primary air outlet 301 in the primary mixing cavity and ignited, stable combustion is started; the initial stage flame of igniteing is less, along with the constantly increasing of nozzle load, the gas volume increase, fuel flows to second level air outlet 302 and tertiary air outlet 303 department in proper order, and fuel constantly mixes with combustion-supporting wind and carries out the staged combustion in the second grade mixing chamber that second level air outlet 302 department formed and the tertiary mixing chamber that tertiary air outlet 303 department formed, finally forms the head end of reliable and stable flame blowout nozzle to heat the outer wall of acidizing kiln. The burner provided by the utility model has the advantages that on the basis of stable combustion, reasonable multi-stage combustion-supporting air is allocated, the burner burns gas in multi-stage different concentration, the fuel concentration is reduced in a continuous grading manner, the combustion temperature at the burner is reduced, the generation and emission of thermal NOx are reduced, the gas is combusted more fully, and the environmental pollution is reduced.
On the basis of the technical scheme, the utility model can be further improved as follows.
In this embodiment, a fourth air outlet 304 is further disposed on the combustion air classifying cylinder 3, the fourth air outlet 304 is disposed at the head end of the combustion air classifying cylinder 3, and the fourth air outlet 304 includes a plurality of spiral grooves uniformly distributed on the periphery of the combustion air classifying cylinder 3.
The helicla flute sets up in the tip periphery of hierarchical section of thick bamboo 3 of combustion-supporting wind, and as the fourth level air outlet 304 of combustion-supporting wind, combustion-supporting wind passes through helicla flute blowout back and the complete gas mixture of unburnt in the flame, firstly continues to provide oxygen for flame, makes the gas combustion more abundant, secondly makes the periphery of flame be the spiral, makes flame more stable, concentrate, prevents to cause the interference to make flame slope in the orientation of acidizing kiln rotation process to flame, influences the heating effect to the acidizing kiln.
In this embodiment, annular steps that are gradually arranged are arranged in the circumferential direction of the combustion air classifying cylinder 3 from the tail end to the head end of the combustion air classifying cylinder 3, and the second-stage air outlet 302 and the third-stage air outlet 303 are respectively arranged on different annular steps.
The second-stage air outlet 302 and the third-stage air outlet 303 are respectively arranged on different annular steps, the annular steps are gradually arranged, and the radial size of the annular step where the third-stage air outlet 303 is located is larger than that of the annular step where the second-stage air outlet 302 is located. The arrangement is that the air quantity is larger and larger along with the staged ejection of the combustion-supporting air, and the space of the mixing cavity of the next stage is larger than that of the mixing cavity of the previous stage, so that the gas and the combustion-supporting air are more fully mixed and more stably combusted. The second-stage air outlet 302 and the third-stage air outlet 303 are respectively arranged on different steps, so that the fuel gas is combusted in a grading manner, the combustion temperature at a burner is favorably reduced, the thermal NOx emission is reduced, and the environmental pollution is reduced; meanwhile, the fuel gas is mixed with the combustion-supporting air in a grading manner and is combusted, so that the fuel gas can be combusted more fully.
In this embodiment, the second-stage air outlet 302 includes a plurality of air outlets, and the plurality of air outlets are uniformly arranged in the radial direction of the combustion air classifying cylinder 3 in an annular shape.
The plurality of air outlets are uniformly distributed in an annular shape, so that combustion-supporting air can be uniformly sprayed out in the circumferential direction of the combustion-supporting air classifying cylinder 3, and flame is stable and does not incline.
In this embodiment, the third-stage air outlet 303 includes a plurality of air outlets, and the plurality of air outlets are uniformly arranged in the radial direction of the combustion air classifying cylinder 3 in an annular shape.
The plurality of air outlets are uniformly distributed in an annular shape, so that combustion-supporting air can be uniformly sprayed out in the circumferential direction of the combustion-supporting air classifying cylinder 3, and flame is stable and does not incline.
In this embodiment, the air outlet is obliquely arranged toward the axis of the combustion-supporting air classifying cylinder 3, and the air outlet direction of the air outlet is toward the head end of the combustion-supporting air classifying cylinder 3.
The combustion-supporting air direction is obliquely arranged and gathered towards the axis of the combustion-supporting air classifying cylinder 3, so that the combustion-supporting air direction can be better mixed with fuel gas, and thrust is generated to enable flame to be smoothly sprayed out of the combustion-supporting air cylinder 1.
In this embodiment, the head end of the gas cylinder 2 extends into the tail end of the combustion air classifying cylinder 3, the head end of the gas cylinder 2 is provided with a convex gas nozzle 202, the gas nozzle 202 is provided with a plurality of gas jet holes arranged in an array manner, and the gas is jetted out through the gas jet holes in a divergent manner.
The gas nozzle 202 sprays the gas in a divergent mode, so that the gas can be better mixed with the first-stage combustion-supporting air at the tail end of the combustion-supporting air classifying cylinder 3, and the ignition success rate is favorably improved.
In this embodiment, an ignition electrode 4 is arranged between the combustion-supporting air duct 1 and the gas duct 2, and an ignition end of the ignition electrode 4 extends to a tail end of the combustion-supporting air classifying duct 3.
After the fuel gas and the combustion-supporting air are premixed in the primary mixing cavity, the ignition electrode 4 ignites the fuel gas to form flame. The ignition end of the ignition electrode 4 is arranged in the tail end of the combustion-supporting air classifying barrel 3, and the rest part of the ignition electrode 4 is hidden in the combustion-supporting air barrel 1, so that the ignition electrode 4 is protected, and the space is saved. Because the combustion-supporting air at normal temperature continuously flows through the combustion-supporting air duct 1, the temperature of the combustion-supporting air duct 1, the gas cylinder 2 and the ignition electrode 4 can be continuously reduced, and the temperature protection effect is achieved.
In this embodiment, a flame detector 5 is arranged between the combustion-supporting air duct 1 and the gas duct 2, and a detection end of the flame detector 5 detects an ignition condition through an air outlet at the tail end of the combustion-supporting air classifying duct 3. Specifically, the flame detector 5 may use an ionization probe or a UV flame detector. When the ionization probe is used, the detection end of the ionization probe extends into the air outlet at the tail end of the combustion-supporting air classifying cylinder 3, so that the ionization probe is contacted with the combusted gas, and whether the ignition is successful or not is confirmed by detecting ions generated by the combusted gas. When the UV flame detector is used for detecting the ignition condition, the detection end of the UV flame detector can be arranged between the combustion-supporting air duct 1 and the gas cylinder 2, the detection end of the UV flame detector does not need to extend into the air outlet at the tail end of the combustion-supporting air classifying cylinder 3, after ignition is successful, light rays emitted by flame irradiate the detection end of the UV flame detector through the air outlet at the tail end of the combustion-supporting air classifying cylinder 3, and the ignition condition can be detected by the UV flame detector.
The flame detector 5 is used for detecting whether the ignition is successful or not and sending the ignition condition to the ignition control system. The flame detector 5 is arranged between the combustion-supporting air cylinder 1 and the fuel gas cylinder 2 so as to protect the flame detector 5.
In this embodiment, the head end of the combustion-supporting air duct 1 is provided with a flame gathering cover 6, and the flame gathering cover 6 is gradually reduced towards the flame spraying direction.
The opening of the flame gathering cover 6 is set to be in a tapered shape, and the flame is still kept concentrated after the flame is sprayed out of the flame gathering cover 6, so that the flame is prevented from being interfered by the rotation process of the acidification kiln and deviating from the outer wall of the acidification kiln, and the heating efficiency is influenced.
The working principle is as follows:
a gas fuel, for example, natural gas is introduced into the gas inlet 201 of the gas cylinder 2, and combustion air is introduced into the combustion air inlet 101 of the combustion air cylinder 1. The first-stage air outlet 301 forms a first-stage mixing cavity, and the fuel gas is mixed with the combustion-supporting air of the first-stage air outlet 301 in the first-stage mixing cavity and is ignited by the ignition electrode 4 to start stable combustion. Initial stage flame of igniteing is less, along with the constantly increasing of nozzle load, the gas volume increase, the fuel of not burning completely is in proper order to second level air outlet 302, third level air outlet 303 and the flow of fourth level air outlet 304 department, the fuel constantly mixes and carries out the staged combustion with combustion-supporting wind in the second grade mixing chamber that second level air outlet 302 department formed and the tertiary mixing chamber that third level air outlet 303 department formed, if there is the fuel of not burning completely still, under the spiral groove effect of fourth level air outlet 304, combustion-supporting wind forms the spiral and carries out abundant mixing with the fuel, finally form the head end of reliable and stable flame blowout nozzle, heat with the outer wall to the acidizing kiln. At fourth level air outlet 304 department, hold together flame cover 6 towards flame outlet convergent, form the level four hybrid chamber, make the periphery of flame be convergent spiral, make flame more stable, concentrate, prevent to cause the interference to make flame slope to the direction of flame in the rotatory in-process of acidizing kiln, the influence is to the heating effect of acidizing kiln. The flame detector 5 detects the flame condition in the working process of the burner and transmits the flame condition back to the ignition control system so as to feed back whether the ignition is successful or not. The burner provided by the utility model has the advantages that on the basis of stable combustion, reasonable multi-stage combustion-supporting air is allocated, the burner burns gas in multi-stage different concentration, the fuel concentration is reduced in a continuous grading manner, the combustion temperature at the burner is reduced, the generation and emission of thermal NOx are reduced, the gas is combusted more fully, and the environmental pollution is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The staged combustion low-nitrogen burner is characterized by comprising a combustion-supporting air cylinder (1), a fuel gas cylinder (2) and a combustion-supporting air staging cylinder (3) which are coaxially arranged, wherein the combustion-supporting air cylinder (1) is sleeved outside the fuel gas cylinder (2) and the combustion-supporting air staging cylinder (3), the head end of the fuel gas cylinder (2) is communicated with the tail end of the combustion-supporting air staging cylinder (3), the head end of the combustion-supporting air cylinder (1) is fixedly connected with the head end of the combustion-supporting air staging cylinder (3), and the tail end of the combustion-supporting air cylinder (1) is hermetically connected with the tail end of the fuel gas cylinder (2); the tail end of the combustion-supporting air duct (1) is provided with a combustion-supporting air inlet (101), and the tail end of the gas duct (2) is provided with a gas inlet (201); the combustion-supporting air classifying cylinder (3) is sequentially provided with a plurality of stages of air outlets from the tail part to the head part, wherein the first stage air outlet (301) is arranged at the tail end of the combustion-supporting air classifying cylinder (3) and is parallel to the gas cylinder (2), and the second stage air outlet (302) and the third stage air outlet (303) are sequentially arranged along the axial direction of the gas cylinder (2).
2. The staged combustion low-nitrogen burner as claimed in claim 1, wherein a fourth air outlet (304) is further disposed on the combustion air staging cylinder (3), the fourth air outlet (304) is disposed at a head end of the combustion air staging cylinder (3), and the fourth air outlet (304) comprises a plurality of spiral grooves uniformly distributed on the periphery of the combustion air staging cylinder (3).
3. The staged combustion low-nitrogen burner as claimed in claim 1, wherein, from the tail end to the head end of the combustion-supporting air staging cylinder (3), annular steps are gradually arranged along the circumferential direction of the combustion-supporting air staging cylinder (3), and the second-stage air outlet (302) and the third-stage air outlet (303) are respectively arranged on different annular steps.
4. The staged combustion low-nitrogen burner as claimed in claim 3, wherein the second-stage air outlet (302) comprises a plurality of air outlets, and the plurality of air outlets are uniformly arranged in a ring shape in a radial direction of the combustion air staging cylinder (3).
5. The staged combustion low-nitrogen burner as claimed in claim 3, wherein the third air outlet (303) comprises a plurality of air outlets, and the plurality of air outlets are uniformly arranged in a ring shape in a radial direction of the combustion air staging cylinder (3).
6. The staged combustion low-nitrogen burner as claimed in claim 4 or 5, wherein the outlet holes are arranged obliquely toward the axis of the combustion air staging cylinder (3), and the outlet direction of the outlet holes is toward the head end of the combustion air staging cylinder (3).
7. The staged combustion low-nitrogen burner as claimed in claim 1, wherein the head end of the gas cylinder (2) extends into the tail end of the combustion air staging cylinder (3), the head end of the gas cylinder (2) is provided with a convex gas nozzle (202), the gas nozzle (202) is provided with a plurality of gas injection holes arranged in an array, and the gas is emitted through the gas injection holes in a divergent manner.
8. The staged combustion low-nitrogen burner as claimed in claim 1, wherein an ignition electrode (4) is disposed between the combustion-supporting air duct (1) and the gas cylinder (2), and an ignition end of the ignition electrode (4) extends to a tail end of the combustion-supporting air staging cylinder (3).
9. The burner with the graded combustion and the low nitrogen content according to claim 1, characterized in that a flame detector (5) is arranged between the combustion-supporting air duct (1) and the gas cylinder (2), and the detection end of the flame detector (5) detects the ignition condition through an air outlet at the tail end of the combustion-supporting air grading cylinder (3).
10. The staged combustion low-nitrogen burner as claimed in claim 1, wherein a flame gathering cover (6) is arranged at the head end of the combustion-supporting air duct (1), and the flame gathering cover (6) is tapered towards the flame ejection direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121168499.9U CN215637143U (en) | 2021-05-27 | 2021-05-27 | Staged combustion low-nitrogen burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121168499.9U CN215637143U (en) | 2021-05-27 | 2021-05-27 | Staged combustion low-nitrogen burner |
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| CN215637143U true CN215637143U (en) | 2022-01-25 |
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| CN202121168499.9U Active CN215637143U (en) | 2021-05-27 | 2021-05-27 | Staged combustion low-nitrogen burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117490064A (en) * | 2023-12-05 | 2024-02-02 | 瓦兰热能设备(无锡)有限公司 | Low-nitrogen environment-friendly burner combustion head |
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2021
- 2021-05-27 CN CN202121168499.9U patent/CN215637143U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117490064A (en) * | 2023-12-05 | 2024-02-02 | 瓦兰热能设备(无锡)有限公司 | Low-nitrogen environment-friendly burner combustion head |
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