CN216953055U - Blowing type sub-low nitrogen burner - Google Patents
Blowing type sub-low nitrogen burner Download PDFInfo
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- CN216953055U CN216953055U CN202122920744.3U CN202122920744U CN216953055U CN 216953055 U CN216953055 U CN 216953055U CN 202122920744 U CN202122920744 U CN 202122920744U CN 216953055 U CN216953055 U CN 216953055U
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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 relates to a blowing type burner, in particular to a blowing type sub-low nitrogen burner which comprises a plurality of fire rows and a gas distribution pipe, wherein the fire rows and the gas distribution pipe are arranged in parallel, the gas distribution pipe is communicated with the fire rows, a plurality of main fire hole groups and flame stabilizing fire holes are arranged on the fire rows, the main fire hole groups and the flame stabilizing fire holes are alternately arranged, and two ends of the fire rows are respectively provided with the main fire hole groups. Compared with the prior art, the utility model reduces the rated heat load of the fire grate and adjusts the required air quantity, so that the burner can carry out low-flame-height and high-air-quantity combustion under the non-maximum heat load, thereby reducing the high-temperature contact time of the flame and the air, cooling the flame by the high-air-quantity oxygen-enriched combustion, reducing the combustion temperature and realizing the emission of sub-low nitrogen.
Description
Technical Field
The utility model relates to a blast type burner, in particular to a blast type sub-low nitrogen burner.
Background
Haze weather is an atmospheric pollution state, and haze is a general expression of exceeding the standard of various suspended particulate matters in the atmosphere. Mainly comprises sulfur dioxide, nitrogen oxide and inhalable particles, wherein the first two are gaseous pollutants, and the second two are solid particles. Under the action of various human factors and climate factors, the air quality is continuously deteriorated, so that the haze weather phenomenon is increased, and the harm is aggravated. After the winter, haze can occur in most areas of the middle east of China, and along with the understanding of people on haze, the haze treatment is also concerned widely.
Burners, such as water heaters and wall-mounted boilers, generate nitrogen oxides during combustion, and are also one of the factors causing haze, and therefore, low-nitrogen burners have come into play. At present, the latest standard of water heaters and wall-mounted furnaces in China is proposed in 2020, wherein 5-grade standard is definitely established for the emission of nitrogen oxides, and the highest grade 5-grade standard requires that the emission of the nitrogen oxides is less than 62 mg/kW.h; the 4-level standard requires that the emission of nitrogen oxides is less than 100 mg/kW.h. Because the files which are not released temporarily in China forcibly specify the nitrogen oxide grades of the water heaters and the wall-mounted furnaces sold in the market, the emission of the nitrogen oxide by each manufacturing enterprise is set according to the requirements of market users.
Currently, low-nitrogen burners on the market mainly use water cooling, rich and lean combustion and full premix combustion, although they can meet the level 5 standard, because they are expensive, manufacturers usually do not manufacture and sell such high-end machines unless they are required by customers, and the kyujin Ji area, which is an area with severe haze pollution, usually requires emissions meeting the level 4 standard, and the mandatory level 5 standard makes the cost of the customers too high to implement. Therefore, research on developing a sub-low nitrogen burner satisfying class 4 emission, particularly a blast burner having a large market demand, is required.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve at least one of the above problems, and an object of the present invention is to provide a blower-type sub-low nitrogen burner which reduces the rated thermal load of a fire grate and adjusts the required air amount to perform low flame height and high air amount combustion at a non-maximum thermal load, thereby reducing the high temperature contact time between the flame and the air, and which achieves sub-low nitrogen emission by cooling the flame by high air amount oxygen-rich combustion and reducing the combustion temperature.
The purpose of the utility model is realized by the following technical scheme:
the utility model provides a sub-low NOx burner of blast type, includes a plurality of parallel arrangement's fire row and gas distributing pipe, each fire row of gas distributing pipe intercommunication, the fire arrange and be equipped with a plurality of main burner groups and steady flame burner, main burner group and steady flame burner alternate arrangement to the both ends of fire arranging all set up to main burner group.
Preferably, the main fire hole group comprises 4 main fire holes which are arranged in a mode of 2 main fire holes in the upper part and the lower part respectively and are symmetrical with the fire row symmetry axis. The arrangement mode ensures that one flame stabilizing fire hole can be arranged beside each main fire hole for flame stabilization, thereby ensuring the stable combustion of each main fire hole; meanwhile, the main fire ports are symmetrically arranged on the two sides of the flame stabilizing fire port, so that the phenomenon that the mixed gas is deflected due to the small resistance of one side of the flame stabilizing fire port (when the main fire port is not arranged) to influence the flame stabilizing effect of the main fire port can be prevented.
Preferably, the flame stabilizing fire hole has a flame cross flame stabilizing function, is a high-efficiency flame stabilizing fire hole, and can reduce the contact time of flame and oxygen, weaken and eliminate the generation condition of nitrogen oxide and further play a role in reducing the emission of nitrogen oxide under the action of the high-efficiency flame stabilizing fire hole, wherein the flame height is reduced, stable and free from jumping.
Preferably, gaps with the width of 1.8-2.5mm are arranged between the fire rows. The arrangement of the slits with proper width can cool the outer flame of the burner, lower the combustion temperature and further reduce the emission of nitrogen oxides. However, when the gap width is too small, it is difficult to achieve the effect; when the width of the gap is too large, the flame transfer and the flue gas temperature of the burner can be influenced, and the realization of the sub-low nitrogen is not facilitated.
Preferably, the blast-type sub-low nitrogen burner further comprises a front fixing frame, a rear fixing frame and side baffles, wherein the front fixing frame and the rear fixing frame are respectively arranged at the front side and the rear side of each fire row, and the front fixing frame and the rear fixing frame are perpendicular to each fire row; the side baffles are respectively arranged at the left end and the right end of the fire grate and fixedly connected with the front fixing frame and the rear fixing frame, and the side baffles are parallel to the fire grates. The front fixing frame and the rear fixing frame are used for fixing the fire rows and enabling the fire rows to be in a parallel state, so that the resistance of a fuel gas channel is ensured to be minimum; the side dams serve two functions: the fire grate fixing device is used for fixedly connecting the front fixing frame and the rear fixing frame to prevent the fire grate from loosening; and secondly, air circulation at the left side and the right side of the combustor can be blocked, so that the phenomenon that the combustion temperature is too low due to too much air entering, incomplete combustion is caused, carbon monoxide is generated, and personal safety is harmed is prevented.
Preferably, the rear fixing frame is provided with a cooling air inlet along the length direction. The cooling air inlet is an auxiliary air inlet which is increased for solving the problem of insufficient secondary air in the rear fire grate, and the cooling air inlet penetrates through the rear part of the burner in a rectangular shape and is unfolded in the direction of extension.
Preferably, the blast-type sub-low nitrogen burner further comprises a secondary air distribution plate, and the secondary air distribution plate is fixed below the fire grate through a front fixing frame and a rear fixing frame. Secondary air is provided to the burner and distributed as required.
Preferably, the secondary air distribution plate is provided with a plurality of secondary air holes, and the hole positions, the hole numbers and the hole diameters of the holes are obtained through computer analysis and experimental adjustment. Specifically, in order to increase the primary air coefficient and ensure that the combustor has enough primary air supply quantity, the primary air entering the injection port reaches the maximum injection capacity, and therefore the number of secondary air holes on the secondary air distribution plate is reduced; in order to avoid the problems that the air pressure at the bottom of the combustor generated by the air inlet position of the fan is not uniform, the secondary air flow rate and the flow of the combustor are not uniform, and further the partial incomplete combustion is caused, the generation of carbon monoxide, the temperature of flue gas, the heat exchanger are heated unevenly and the like, and the normal operation of the machine is seriously affected, so that the hole position and the hole diameter of the secondary air are determined through computer analysis and experimental adjustment.
Preferably, the aperture is controlled within the range of 2-4mm, and the sum of the areas of the holes, depending on the flame height and the smoke emission requirements, is not more than 1/3-1/2 of the area of the secondary air bottom plate.
Preferably, the fire grate further comprises an injection port, a mixing chamber, an air adjusting belt, a static pressure cavity and a fire hole which are communicated in sequence, and the fire hole comprises a main fire hole and a flame stabilizing fire hole. The gas and the air enter the fire grate from the injection port, and then the air and the gas are fully mixed in the mixing chamber, flow into the gas regulating belt, flow into the static pressure cavity in an isobaric manner, and then flow out of the fire grate uniformly from the static pressure cavity.
Preferably, a plurality of nozzles are fixed on the fuel gas distribution pipe, and the nozzles are aligned with the injection ports of the fire row. The gas enters the gas distribution pipe and is uniformly distributed to each nozzle, and the gas is ejected out of the nozzles and flows into the fire row ejection port together with the airflow generated by forced air blowing.
Preferably, the fire row injection port and the gas distribution pipe are both fixed on the front fixing frame, so that the alignment of the nozzle of the gas distribution pipe and the injection port is ensured.
Preferably, the distance between the injection port and the nozzle of the fuel gas distribution pipe is 3.2-4.2 mm. The resistance when the primary air enters the injection port can be effectively reduced by controlling the distance.
The fire grate (combustion unit of the burner) of the traditional atmospheric combustion mainly focuses on rated maximum power, and the maximum output power of the burner is achieved under the condition of the maximum power of the fire grate, so that the minimum cost of the burner is achieved, and the burner is suitable for the output power of the whole machine. The focus of the sub-low NOx burner is two factors, the first being on maximum heat load output and the second being on NOx emissions. In order to meet the two points, the primary air coefficient is required to be corrected when the combustor is designed, the primary air coefficient is increased, and each fire row is reduced to 1.6kw from the original 2kw by increasing the number of fire rows (the specific number of fire rows is determined according to the requirement of power adjustment), so that the primary air coefficient reaches 75-80%, and the function of reducing the flame height is achieved; more importantly, the structure of the fire hole is improved, the flame stabilizing fire hole with the flame cross flame stabilizing function and the main fire hole group are alternately arranged, so that the generation condition of nitrogen oxides is effectively weakened and eliminated, and the effect of reducing the emission of the nitrogen oxides is further achieved. Wherein flame holding burner with flame cross flame holding function set up along main burner length direction, the mist is by flame holding burner slant blowout for flame (flame holding) that the burning generated and flame (main flame) of main burner form alternately, the root of flame can the direct heating main flame of flame holding like this, and then can make the propagation velocity of main flame burning accelerate, make the flame that the burning generated can press close to the burner plane, effectively reduce the flame height, realize the stable burning of flame.
In summary, the blowing-type sub-low nitrogen burner of the present invention adopts an atmospheric combustion mode, and reduces the rated thermal load of each fire bank and adjusts the required air amount, so that the burner obtains a combustion mode of low flame height and high air amount when the burner is not at the maximum thermal load (the improvement mainly comes from the improvement of the fire hole), thereby reducing the high temperature contact time of the flame and the air, realizing the oxygen-enriched combustion by the high air amount to cool the flame, and reducing the combustion temperature to realize the sub-low nitrogen emission.
The working principle of the utility model is as follows:
gas and air enter the fire grate through the gas distribution pipe and then are combusted at the main fire hole and the flame stabilizing fire hole. Wherein, steady flame of steady flame burner is different from ordinary steady flame burner, and this kind of burner has the function of the alternately steady flame of flame, is a high-efficient steady flame burner, and the flame height of this steady flame burner is lower, stable, do not have and beats, can reduce the contact time of flame and oxygen, weakens and eliminates nitrogen oxide's production condition, and then can play the effect that reduces nitrogen oxide and discharge. The main fire hole group and the flame stabilizing fire holes are alternately arranged on the fire grate, so that the generation of nitrogen oxides can be effectively improved.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the flame stabilizing fire hole and the main fire hole group with the flame cross flame stabilizing function are alternately arranged, so that the flame height is reduced, stabilized and does not jump under the action of the high-efficiency flame stabilizing fire hole, the contact time of the flame and oxygen can be reduced, the generation condition of nitrogen oxide is weakened and eliminated, and the effect of reducing the emission of the nitrogen oxide can be further achieved; meanwhile, the primary air coefficient is corrected when the combustor is designed, the primary air coefficient is increased, and each row of fire rows is reduced to 1.6kW from the original 2kW by increasing the number of the fire rows, so that the primary air coefficient reaches 75-80%, and the effect of reducing the flame height is further achieved.
2. The hole position, the hole number and the hole diameter of the holes on the secondary air distribution plate are obtained by computer analysis and experimental adjustment and are in an optimal state, so that the combustion effect of the combustor is improved. Specifically, in order to increase the primary air coefficient and ensure that the combustor has enough primary air supply quantity, the primary air entering the injection port reaches the maximum injection capacity, and therefore the number of secondary air holes on the secondary air distribution plate is reduced; in order to avoid the problems that the air pressure at the bottom of the combustor generated by the air inlet position of the fan is not uniform, the secondary air flow rate and the flow of the combustor are not uniform, and further the partial incomplete combustion is caused, the generation of carbon monoxide, the temperature of flue gas, the heat exchanger are heated unevenly and the like, and the normal operation of the machine is seriously affected, so that the hole position and the hole diameter of the secondary air are determined through computer analysis and experimental adjustment.
3. In order to reduce the outer flame temperature of the flame of the burner and reduce the emission of nitrogen oxides, a gap with a certain width is reserved between fire rows so as to provide surplus air except the air required by normal combustion. The utility model controls the gap between 1.8 mm and 2.5mm, so as to avoid influencing the fire transmission and the smoke temperature.
4. The nitrogen oxide emission of the traditional blast-type burner is 165-185 mg/kWh, which is higher than the 4-level standard specified by the state, the carbon monoxide emission of the blast-type sub-low nitrogen burner is below 100ppm under the maximum heat load, the oxygen content is below 9 percent, and the blast-type sub-low nitrogen burner meets the national standard; the flue gas temperature is above 120 ℃, the efficiency can reach 94 percent, and the national standard is met; the emission of the nitrogen oxides after being weighted according to the national standard is 65-90 mg/kW.h, meets the national level 4 standard and approaches the level 5 standard, and the device has a simple structure and is suitable for use.
Drawings
FIG. 1 is a schematic view of an angle structure of a blower type sub-low nitrogen burner of the present invention;
FIG. 2 is a schematic view of another angle of the blower-type sub-low nitrogen burner of the present invention;
FIG. 3 is a schematic top view of a fire grate of the blower-type sub-low nitrogen burner of the present invention;
FIG. 4 is a schematic cross-sectional view of a fire grate of the blower type sub-low nitrogen burner of the present invention;
in the figure: 1-fire grate; 2-side baffle; 3-gas distribution pipe; 4-front fixing frame; 5-cooling air inlet; 6-rear fixing frame; 7-a secondary air distribution plate; 8-an injection port; 9-a mixing chamber; 10-a gas regulating zone; 11-a hydrostatic chamber; 12-fire hole; 13-main fire hole; 14-flame stabilizing fire hole.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments.
Example 1
A blowing-type sub-low nitrogen burner is shown in figures 1-4 and comprises a plurality of fire rows 1 and gas distribution pipes 3 which are arranged in parallel, wherein the gas distribution pipes 3 are communicated with the fire rows 1, a plurality of main fire hole groups and flame stabilizing fire holes 14 are arranged on the fire rows 1, the main fire hole groups and the flame stabilizing fire holes 14 are arranged alternately, and the two ends of the fire rows 1 are respectively provided with the main fire hole groups.
More specifically, in the present embodiment:
the main fire hole groups and the flame stabilizing fire holes 14 are arranged in a mode shown in fig. 3, and two ends of the fire grate 1 are both the main fire hole groups, each main fire hole group comprises 4 main fire holes 13 which are arranged in a mode of 2 main fire holes respectively at the upper part and the lower part and are symmetrical by a fire grate symmetry axis, so that one flame stabilizing fire hole 14 can be arranged beside each main fire hole 13 for flame stabilization, and the combustion stability of each main fire hole 13 is ensured; meanwhile, the main fire holes 13 are symmetrically arranged on two sides of the flame stabilizing fire hole 14, so that the phenomenon that the mixed gas generates bias flow due to small resistance (when no main fire hole exists) on one side of the flame stabilizing fire hole 14 and the flame stabilizing effect of the main fire hole 13 is influenced can be prevented. The flame stabilizing fire hole 14 has a flame cross flame stabilizing function, is a high-efficiency flame stabilizing fire hole 14, has the advantages of reducing the height of flame, stabilizing the flame and no jumping under the action of the high-efficiency flame stabilizing fire hole 14, can reduce the contact time of the flame and oxygen, weakens and eliminates the production conditions of nitrogen oxides, and further can play a role in reducing the emission of the nitrogen oxides. A gap with the width of 1.8-2.5mm needs to be arranged between the adjacent fire rows 1, so that the outer flame of the burner can be cooled, the combustion temperature is reduced, and the emission of nitrogen oxides is further reduced. However, if the gap width is too small, it is difficult to achieve this effect; and if the gap width is too large, the flame transfer and the flue gas temperature of the combustor can be influenced, and the realization of the sub-low nitrogen is not facilitated. In this embodiment, a gap of 2mm width is used to obtain a superior effect.
Each fire hole 12 of the fire grate 1 (including the main fire hole 13 and the flame stabilizing fire hole 14) is an injection hole 8, a mixing chamber 9, an air adjusting belt 10, a static pressure cavity 11 and a fire hole 12 which are sequentially communicated, as shown in fig. 4, fuel gas and air enter the fire grate 1 from the injection hole 8, and then the air and the fuel gas are fully mixed in the mixing chamber 9, flow into the air adjusting belt 10, flow into the static pressure cavity 11 in an isobaric manner, and then flow out of the fire holes 12 uniformly from the static pressure cavity 11.
The blast type sub-low nitrogen burner also comprises a front fixing frame 4, a rear fixing frame 6, a side baffle 2 and a secondary air distribution plate 7, wherein the front fixing frame 4 and the rear fixing frame 6 are respectively arranged at the front side and the rear side of each fire row 1, and the front fixing frame 4 and the rear fixing frame 6 are vertical to each fire row 1; the side baffles 2 are respectively arranged at the left end and the right end of the fire grate 1 and are fixedly connected with a front fixing frame 4 and a rear fixing frame 6, and the side baffles 2 are parallel to the fire grates 1; the secondary air distribution plate 7 is fixed below the fire grate 1 through the front fixing frame 4 and the rear fixing frame 6, and the four together form an enclosing structure, as shown in fig. 1. The front fixing frame 4 and the rear fixing frame 6 are used for fixing the fire rows 1 and enabling the fire rows 1 to be in a parallel state so as to ensure that the resistance of a gas channel is minimum; the front fixing frame 4 is also a key part for fixing the injection port 8 of the fire row 1 and fixing the fuel gas distribution pipe 3, and is used for ensuring that the nozzles of the fuel gas distribution pipe are aligned with the injection port 8, a plurality of nozzles fixed on the fuel gas distribution pipe 3 are aligned with the injection ports 8 of the fire row 1 one by one, fuel gas is uniformly distributed to each nozzle after entering the fuel gas distribution pipe 3 and flows into the injection port 8 of the fire row 1 together with airflow generated by forced air blasting after being ejected out of the nozzles, and particularly, the distance between the injection ports 8 and the nozzles of the fuel gas distribution pipe 3 is controlled to be 3.2-4.2mm, so that the resistance when primary air enters the injection ports 8 is effectively reduced, and in the embodiment, the distance is controlled to be 3.8 mm; in order to solve the problem that secondary air of the rear fire grate 1 is insufficient, a cooling air inlet 5 is formed in the rear fixing frame 6 along the length direction, belongs to an auxiliary air inlet, penetrates through the rear part of the combustor in a rectangular shape, and is unfolded in the extension direction. The side dams 2 have two functions: the fire grate is used for fixedly connecting a front fixing frame 4 and a rear fixing frame 6 to prevent the fire grate 1 from loosening; and secondly, air circulation at the left side and the right side of the combustor can be blocked, so that the phenomenon that the combustion temperature is too low due to too much air entering, incomplete combustion is caused, carbon monoxide is generated, and personal safety is harmed is prevented. The secondary air distribution plate 7 provides secondary air for the burner and distributes the secondary air according to requirements; the secondary air distribution plate 7 is provided with secondary air holes, and the hole positions, the hole numbers and the hole diameters of the holes are obtained through computer analysis and experimental adjustment, specifically, in order to increase the primary air coefficient and ensure that the combustor has enough primary air supply quantity, the primary air entering the injection port 8 reaches the maximum injection capacity, and therefore, the number of the secondary air holes on the secondary air distribution plate 7 is reduced; in order to avoid the problems that the air pressure at the bottom of the combustor generated by the air inlet position of the fan is not uniform, the secondary air flow rate and the flow of the combustor are not uniform, and further the partial incomplete combustion is caused, the generation of carbon monoxide, the temperature of flue gas, the heat exchanger are heated unevenly and the like, and the normal operation of the machine is seriously affected, so that the hole position and the hole diameter of the secondary air are determined through computer analysis and experimental adjustment. In this embodiment, the distribution and number of holes of the secondary air distribution plate 7 are as shown in FIG. 2, and the distribution and number obtained by the optimization in this embodiment are about 2-4mm in diameter.
The fire grate 1 (combustion unit of the burner) of the traditional atmospheric combustion mainly focuses on rated maximum power, and the maximum output power of the burner is achieved under the condition of the maximum power of the fire grate 1, so that the minimum cost of the burner is achieved, and the burner is suitable for the output power of the whole machine. The focus of the sub-low NOx burner is two factors, the first being on maximum heat load output and the second being on NOx emissions. In order to meet the two points, the primary air coefficient is required to be corrected when the combustor is designed, the primary air coefficient is increased, and the number of the fire rows 1 is increased, so that each fire row 1 is reduced from the original 2kW to 1.6kW, and the primary air coefficient reaches 75-80% to achieve the effect of reducing the flame height; more importantly, the structure of the fire hole 12 is improved, and the flame holding fire holes 14 with the flame crossing flame holding function and the main fire hole group are alternately arranged, so that the generation condition of nitrogen oxides is effectively weakened and eliminated, and the effect of reducing the emission of the nitrogen oxides is further achieved. Wherein the steady flame burner 14 who has flame cross steady flame function mentioned sets up along main burner 13 length direction, the mist is by steady flame burner 14 slant blowout, make flame (steady flame) that the burning generated form alternately with flame (main flame) of main burner 13, the root of steady flame can the direct heating main flame like this, and then can make the propagation velocity of main flame burning accelerate, make the flame that the burning generated can press close to the burner plane, effectively reduce the flame height, realize the steady burning of flame.
In summary, the blowing-type sub-low nitrogen burner in this embodiment adopts an atmospheric combustion mode, and reduces the rated thermal load of each fire bank 1 and adjusts the required air amount, so that the burner obtains a combustion mode of low flame height and high air amount at non-maximum thermal load (the improvement is mainly due to the improvement on the fire hole 12), thereby reducing the high temperature contact time of the flame and the air, realizing oxygen-enriched combustion at high air amount to cool the flame, and reducing the combustion temperature to realize sub-low nitrogen emission.
The working principle of the utility model is as follows:
gas and air enter the fire row 1 from the gas distribution pipe 3 and then are combusted at the main fire hole 13 and the flame stabilizing fire hole 14. The flame stabilizing fire hole 14 is different from the common flame stabilizing fire hole 14, the fire hole 12 has the function of flame cross flame stabilization and is a high-efficiency flame stabilizing fire hole 14, the flame height of the flame stabilizing fire hole 14 is low, stable and free of jumping, the contact time of flame and oxygen can be reduced, the generation condition of nitrogen oxide is weakened and eliminated, and the effect of reducing the emission of the nitrogen oxide can be further achieved. The main burner groups and the flame stabilizing burner 14 are alternately arranged on the fire grate 1, so that the generation of nitrogen oxides can be effectively improved.
The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a sub-low NOx burner of blast type, includes a plurality of parallel arrangement's fire row (1) and gas distributing pipe (3), gas distributing pipe (3) each fire row (1) of intercommunication, its characterized in that, fire row (1) on be equipped with a plurality of main burner groups and steady flame burner (14), main burner group and steady flame burner (14) alternate arrangement to the both ends of fire row (1) all set up to main burner group.
2. A blast-type sub-low-nitrogen burner as set forth in claim 1, wherein said main burner group comprises 4 main burners (13) arranged in a manner of 2 main burners (13) on the upper and lower sides, respectively, and being axisymmetric with respect to the fire row (1).
3. A blast-type sub-low nitrogen burner as claimed in claim 1, wherein said fire rows (1) are provided with a gap of 1.8-2.5mm width.
4. A blowing-type sub-low-nitrogen burner according to claim 1, characterized in that the blowing-type sub-low-nitrogen burner further comprises a front fixing frame (4), a rear fixing frame (6) and side baffles (2), the front fixing frame (4) and the rear fixing frame (6) are respectively arranged at the front side and the rear side of each fire row (1), and the front fixing frame (4) and the rear fixing frame (6) are perpendicular to each fire row (1); the side baffles (2) are respectively arranged at the left end and the right end of the fire grate (1) and are fixedly connected with the front fixing frame (4) and the rear fixing frame (6), and the side baffles (2) are parallel to the fire grates (1).
5. A blower-type sub-low NOx burner in accordance with claim 4, wherein said rear mount (6) is formed with a cooling air inlet (5) along the length direction.
6. A forced draft sub-low NOx burner according to claim 4, further comprising a secondary air distribution plate (7), wherein said secondary air distribution plate (7) is fixed under the fire grate (1) by means of a front fixing frame (4) and a rear fixing frame (6).
7. A blowing-type sub-low nitrogen burner according to claim 6, characterized in that said secondary air distribution plate (7) is provided with a plurality of secondary air holes.
8. The blast-type sub-low nitrogen burner according to claim 1, wherein the fire grate (1) further comprises an injection port (8), a mixing chamber (9), an air adjusting zone (10), a static pressure cavity (11) and a fire port (12) which are sequentially communicated, and the fire port (12) comprises a main fire port (13) and a flame stabilizing fire port (14).
9. A blast-type sub-low-nitrogen burner according to claim 8, wherein said gas distribution pipe (3) is fixed with a plurality of nozzles, said nozzles being aligned with the injection ports (8) of the fire row (1).
10. A blast-type sub-low-nitrogen burner according to claim 9, wherein the distance between the injection port (8) and the nozzle of the gas distribution pipe (3) is 3.2-4.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122920744.3U CN216953055U (en) | 2021-11-26 | 2021-11-26 | Blowing type sub-low nitrogen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122920744.3U CN216953055U (en) | 2021-11-26 | 2021-11-26 | Blowing type sub-low nitrogen burner |
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| Publication Number | Publication Date |
|---|---|
| CN216953055U true CN216953055U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122920744.3U Active CN216953055U (en) | 2021-11-26 | 2021-11-26 | Blowing type sub-low nitrogen burner |
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| CN (1) | CN216953055U (en) |
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2021
- 2021-11-26 CN CN202122920744.3U patent/CN216953055U/en active Active
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