CN216047662U - High wind speed low-nitrogen combustor - Google Patents
High wind speed low-nitrogen combustor Download PDFInfo
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- CN216047662U CN216047662U CN202120272138.2U CN202120272138U CN216047662U CN 216047662 U CN216047662 U CN 216047662U CN 202120272138 U CN202120272138 U CN 202120272138U CN 216047662 U CN216047662 U CN 216047662U
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Abstract
The utility model discloses a high-wind-speed low-nitrogen combustor which comprises a primary gas pipeline, wherein a primary gas outlet is formed in the front part of the primary gas pipeline, a main gas pipeline is sleeved and fixed on the rear side of the primary gas pipeline, a secondary gas pipeline is fixed on the periphery of the primary gas pipeline, a secondary gas spray head is fixed at the front end of the secondary gas pipeline in a sleeved mode, a bluff body flame stabilizer is fixed on the front part of the primary gas pipeline in a sleeved mode, a zigzag necking combustion cylinder is fixed on the outer portion of the secondary gas in a sleeved mode, an air supply system is fixed on the right side of the zigzag necking combustion cylinder in a sleeved mode, the zigzag necking combustion cylinder is replaced by a rectangular necking combustion cylinder, the bluff body flame stabilizer is replaced by a rotational flow flame stabilizer, the air supply system comprises a fan, an air door and a smoke inlet, and the primary gas outlet is a radial outlet; the utility model has the advantages of reducing the operation risk, greatly reducing the smoke circulation and reducing the power consumption in the operation process.
Description
Technical Field
The utility model belongs to the technical field of high-wind-speed low-nitrogen combustors, and particularly relates to a high-wind-speed low-nitrogen combustor.
Background
The flue gas recirculation technology has certain disadvantages: namely, the oxygen content of the combustion-supporting air is reduced, and meanwhile, the combustion-supporting air quantity is increased, so that the phenomenon of fire escape exists, the combustion is unstable, and the operation risk is increased; the problems of thermoacoustic excitation, surge and the like occur in the operation process; the increase of air volume also causes the increase of the pressure resistance of the combustion system, and the system has the problem of output reduction; the condition that the heated surface and the heat insulation wall are burnt due to overlarge flame size occurs; because a large amount of smoke is introduced, the combustion-supporting air quantity and the combustion-supporting air temperature are improved to different degrees, the power of a corresponding combustion-supporting fan is forced to be improved, the power consumption is increased in the operation process, the reliability of partial electric devices is reduced due to overhigh temperature, and the low-nitrogen combustor product mainly adopts a smoke recirculation technology at the present stage, namely, a part of smoke is introduced into the combustion-supporting air, the oxygen concentration of the combustion-supporting air is reduced, the combustion reaction is weakened, the flame distribution area is enlarged, the temperature peak value in a combustion chamber is reduced, and the generation of nitrogen oxides is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-wind-speed low-nitrogen combustor which has the advantages of reducing operation risks, greatly reducing flue gas circulation amount and reducing power consumption in the operation process, and solves the problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a low nitrogen burner of high wind speed, includes a gas pipeline, a gas export has been seted up to a gas pipeline front portion, a gas pipeline rear side suit is fixed with the main line pipeline, a gas pipeline periphery is fixed with the secondary gas pipeline, secondary gas pipeline front end is fixed with secondary gas shower nozzle through the suit, a gas pipeline front portion is fixed with bluff body flame stabilizer through the suit, the outside suit of secondary gas pipeline is fixed with a zigzag throat combustion cylinder, zigzag throat combustion cylinder right side is fixed with the air feed system through the suit.
Preferably, the zigzag necking combustion cylinder is replaced by a rectangular necking combustion cylinder.
Preferably, the bluff body flame holder is replaced by a rotational flow flame holder.
Preferably, the air supply system comprises a fan, a damper and a flue gas inlet.
Preferably, the primary gas outlet is a radial outlet.
Preferably, the flame on the left side of the combustion cylinder forms a central flame stabilizing area, a flame overlapping area and a main flame area.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model provides a low nitrogen burner of high wind speed, combustion-supporting wind and gas velocity of flow are different from traditional combustor, and traditional combustor gas velocity of flow is higher, and combustion-supporting wind velocity of flow is lower, and combustion-supporting wind passes through by the annular channel that steady flame ware and a combustion cylinder constitute, and the velocity of flow is promoted, reaches about the twice of gas velocity of flow, and in the exit, combustion-supporting wind's efflux will drive the flue gas circulation in the combustion chamber by a wide margin, dilutes combustion-supporting wind and gas, reduces the intensity of combustion reaction.
2. A high-wind-speed low-nitrogen burner features that the central primary gas pipeline is radially sprayed outward, the flame stabilizer is a porous bluff body structure, and the internal combustion-supporting wind has low wind speed and can form stable hollow flame.
3. The utility model provides a high wind speed low nitrogen combustor, outside secondary gas shower nozzle outwards sprays the gas to one side, and the combustion cylinder shelters from partial shower nozzle area, and the combustion cylinder structure is different from traditional combustion cylinder structure, and the exit is zigzag or rectangle, and combustion-supporting wind forms the vortex here and gas and flue gas intensive mixing, and the vortex of here also has the effect of stabilizing flame simultaneously.
4. A high-wind-speed low-nitrogen combustor is characterized in that a flame-central stable flame area formed by a central primary gas pipeline and a flame-main flame area formed by secondary gas have a superposition area-flame overlapping area, so that the central stable flame area can be used as an ignition source of the peripheral main flame area to form stable flame.
5. The utility model provides a low nitrogen combustor of high wind speed, flame present hollow structure, the regional diffusion of doubly maximize of distribution of flame, the biggest reduction of temperature peak value, heating power type NOx generates by a wide margin and is cut down, only needs the outside flue gas of a small amount can reach thirty milligrams's emission requirement.
6. A flame stabilizer of a high-wind-speed low-nitrogen combustor and a flame stabilizing function of a combustion cylinder make the operation of the combustor more stable and greatly increase the flame stability.
Drawings
FIG. 1 is a schematic cross-sectional view of a combustion can of a high velocity low NOx combustor in accordance with the present invention;
FIG. 2 is a schematic view of the inside of an air supply system of a high wind speed low nitrogen combustor according to the present invention;
FIG. 3 is a schematic view of a zigzag-shaped necking combustion cylinder of a high wind speed low nitrogen combustor according to the present invention;
FIG. 4 is a schematic view of a zigzag necking combustion cylinder and a swirling flame holder of the high-wind-speed low-nitrogen combustor according to the utility model;
FIG. 5 is a schematic view of a rectangular throat combustion cylinder and a bluff body flame stabilization disk of a high wind speed low nitrogen burner according to the present invention;
FIG. 6 is a schematic view of a rectangular throat combustion can and a swirl flame holder of a high wind speed low nitrogen burner according to the present invention;
FIG. 7 is a schematic view of a rectangular combustion can with reduced throat for a high wind speed low NOx burner in accordance with the present invention.
The figures are labeled as follows: 1. a zigzag necking combustion cylinder; 2. a main gas pipeline; 3. a secondary gas pipeline; 4. a primary gas pipeline; 5. a bluff body flame stabilizer; 6. a rectangular necking combustion cylinder; 7. a secondary gas nozzle; 8. a primary gas outlet; 9. a swirling flame stabilizer; 10. an air supply system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
referring to fig. 1, 2 and 3, a high wind speed low nitrogen burner is provided, in which a zigzag necking combustion cylinder 1 is fixed on the left side of an air supply system 10 and connected by a main gas pipeline 2, a flame stabilizer inside the zigzag necking combustion cylinder 1 is a blunt flame stabilizer 5, a central primary gas pipeline 4 is radially and outwardly sprayed, a combustion-supporting wind inside the blunt flame stabilizer 5 has a low wind speed and can form a stable hollow flame, the combustion-supporting wind passes through an annular channel formed by the flame stabilizer and the combustion cylinder, the flow rate is increased to about twice the gas flow rate, the internal flue gas circulation is greatly increased, the hollow flame structure dilutes the combustion-supporting wind and the gas, the combustion reaction intensity is reduced, the combustion-supporting wind forms a zigzag at the outlet of the combustion cylinder, the vortex forms a vortex to be fully mixed with the gas and the flue gas, the vortex also has the function of stabilizing the flame, the flame formed by the central primary pipeline 4 and the flame formed by the central flame-central flame region and the secondary gas-the main flame region In the overlapping area-flame overlapping area, the central flame stabilizing area can be used as a pilot source of the peripheral main flame area to form stable flame, and the flame stabilizing function of the combustion cylinder enables the operation of the combustor to be more stable, so that the flame stability is greatly improved.
Example 2:
referring to fig. 3 and 4, a high wind speed low nitrogen burner, a zigzag necking combustion cylinder 1 is fixed on the left side of an air supply system 10 and connected through a main gas pipeline 2, a flame stabilizer inside the zigzag necking combustion cylinder 1 is a rotational flow flame stabilizer 9, a central primary gas pipeline 4 radially sprays outwards, the flame stabilizer is a blunt body flame stabilizer 5, combustion-supporting air inside forms a stable vortex at the position to form stable hollow flame, the combustion-supporting air passes through an annular channel formed by the flame stabilizer and the combustion cylinder, the flow rate is increased to about twice the flow rate of the gas, the internal flue gas circulation is greatly increased, the hollow flame structure dilutes the combustion-supporting air and the gas to reduce the intensity of combustion reaction, the outlet of the combustion cylinder is zigzag, the combustion-supporting air forms vortex at the position to be fully mixed with the gas and the flue gas, and the vortex at the position also has the function of stabilizing the flame, the flame-central stable flame area formed by the central primary gas pipeline 4 and the flame-main flame area formed by the secondary gas have a superposition area-flame overlapping area, so that the central stable flame area can be used as a fire-leading source of the peripheral main flame area to form stable flame, and the flame stabilizing function of the combustion cylinder per se enables the operation of the combustor to be more stable, and the flame stability to be greatly improved.
Example 3:
referring to fig. 5 and 7, a high wind speed low nitrogen burner is disclosed, wherein a rectangular necking combustion cylinder 6 is fixed on the left side of an air supply system 10 and connected by a main gas pipeline 2, a flame stabilizing disc of the rectangular necking combustion cylinder 6 is a bluff body flame stabilizer 5, a central primary gas pipeline 4 is radially and outwardly sprayed, the speed of combustion-supporting air inside the bluff body flame stabilizer 5 is low and can form stable hollow flame, the combustion-supporting air passes through an annular channel formed by the flame stabilizer and the combustion cylinder, the flow rate is increased to be about twice of the gas flow rate, the internal flue gas circulation is greatly increased, the hollow flame structure dilutes the combustion-supporting air and the gas and reduces the intensity of combustion reaction, the outlet of the combustion cylinder is rectangular, the combustion-supporting air forms a vortex to be fully mixed with the gas and the flue gas, meanwhile, the vortex at the position also has the function of stabilizing flame, and the flame-central flame area formed by the central primary gas pipeline 4 and the flame-main flame area formed by the secondary gas have an overlapping area The flame overlap area, therefore the central stable flame area can be as the ignition source in periphery main flame area, forms stable flame, and the steady flame function of combustion cylinder itself makes the operation of combustor more stable, increases flame stability by a wide margin.
Example 4:
referring to fig. 6 and 7, a high wind speed low nitrogen burner is characterized in that a rectangular necking combustion cylinder 6 is fixed on the left side of an air supply system 10 and is connected with the air supply system through a main gas pipeline 2, a flame stabilizer of the rectangular necking combustion cylinder 6 is a rotational flow flame stabilizer 9, a central primary gas pipeline 4 is radially and outwardly sprayed, combustion-supporting air inside the flame stabilizer forms stable vortex at the position to form stable hollow flame, the combustion-supporting air passes through an annular channel formed by the flame stabilizer and the combustion cylinder, the flow rate is increased to be about twice of the gas flow rate, the internal flue gas circulation is greatly increased, the hollow flame structure dilutes the combustion-supporting air and the gas to reduce the intensity of combustion reaction, the outlet of the combustion cylinder is rectangular, the combustion-supporting air forms vortex to be fully mixed with the gas and the flue gas, meanwhile, the vortex at the position also has the function of stabilizing flame, and the flame-central flame region formed by the central primary gas pipeline 4 and the flame-main flame region formed by the secondary gas have an overlapping region The central flame stabilizing area can be used as an ignition source of the peripheral main flame area to form stable flame, and the flame stabilizing function of the combustion cylinder enables the operation of the combustor to be more stable and greatly improves the flame stability.
The working principle is as follows: a high wind speed low nitrogen burner, combustion-supporting wind and gas velocity of flow are different from the traditional burner, the traditional burner gas velocity of flow is higher, and the combustion-supporting wind velocity of flow is lower, the combustion-supporting wind is passed through the annular channel that flame stabilizer and combustion cylinder constitute, the velocity of flow is promoted, reach about twice of the gas velocity of flow, in the exit, the efflux of combustion-supporting wind will drive the flue gas circulation in the combustion chamber by a wide margin, dilute combustion-supporting wind and gas, reduce the intensity of combustion reaction, the central primary gas pipeline 4 is connected to the main gas pipeline 2 and radially sprays through the primary gas outlet 8, the flame stabilizer is bluff body flame stabilizer 5, the internal combustion-supporting wind speed is lower, and there is stable vortex, can form stable hollow flame, the external secondary gas pipeline 3 sprays gas through the secondary gas shower nozzle 7 obliquely outwards, the combustion cylinder shelters from partial shower nozzle area, the combustion cylinder structure is different from the traditional combustion cylinder structure, zigzag throat combustion cylinder 1, combustion-supporting wind forms the vortex here and gas and flue gas intensive mixing, the vortex here also has flame stabilizing's effect simultaneously, the flame that the gas pipeline 4 formed at the center is as the ignition source of periphery main flame, form stable flame, flame presents for hollow structure, the diffusion of the regional multiple maximize of distribution of flame, the at utmost of temperature peak value reduces, heating power type NOx generates by reducing by a wide margin, only need a little outside flue gas alright reach thirty milligrams's emission requirement, the flame stabilizing function of bluff body flame stabilizer 5 and combustion cylinder itself, make zigzag throat combustion cylinder 1's operation more stable, increase flame stability by a wide margin.
While there have been shown and described the fundamental principles and essential features of the utility model and advantages thereof, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A high wind speed low NOx burner characterized in that: including once gas pipeline (4), once gas pipeline (4) front portion is seted up once gas export (8), once gas pipeline (4) rear side suit is fixed with main gas pipeline (2), once gas pipeline (4) periphery is fixed with secondary gas pipeline (3), secondary gas pipeline (3) front end is fixed with secondary gas shower nozzle (7) through the suit, once gas pipeline (4) front portion is fixed with bluff body flame stabilizer (5) through the suit, secondary gas pipeline (3) outside suit is fixed with zigzag throat combustion cylinder (1), zigzag throat combustion cylinder (1) right side is fixed with air feed system (10) through the suit.
2. A high wind speed low nitrogen burner as claimed in claim 1, wherein: the zigzag necking combustion cylinder (1) is replaced by a rectangular necking combustion cylinder (6).
3. A high wind speed low nitrogen burner as claimed in claim 1, wherein: the bluff body flame stabilizer (5) is replaced by a rotational flow flame stabilizer (9).
4. A high wind speed low nitrogen burner as claimed in claim 2, wherein: the air supply system (10) comprises a fan, an air door and a smoke inlet.
5. A high wind speed low nitrogen burner as claimed in claim 1, wherein: the primary gas outlet (8) is a radial outlet.
6. A high wind speed low nitrogen burner as claimed in claim 1, wherein: the left flame of the zigzag necking combustion cylinder (1) is respectively provided with a central flame stabilizing area, a flame overlapping area and a main flame area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120272138.2U CN216047662U (en) | 2021-01-30 | 2021-01-30 | High wind speed low-nitrogen combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120272138.2U CN216047662U (en) | 2021-01-30 | 2021-01-30 | High wind speed low-nitrogen combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216047662U true CN216047662U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120272138.2U Active CN216047662U (en) | 2021-01-30 | 2021-01-30 | High wind speed low-nitrogen combustor |
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| CN (1) | CN216047662U (en) |
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- 2021-01-30 CN CN202120272138.2U patent/CN216047662U/en active Active
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