CN216346243U - Pulverized coal burner nozzle - Google Patents
Pulverized coal burner nozzle Download PDFInfo
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- CN216346243U CN216346243U CN202123157878.0U CN202123157878U CN216346243U CN 216346243 U CN216346243 U CN 216346243U CN 202123157878 U CN202123157878 U CN 202123157878U CN 216346243 U CN216346243 U CN 216346243U
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Abstract
The utility model provides a pulverized coal burner nozzle, and relates to the technical field of pulverized coal burner nozzles. The utility model provides a pulverized coal burner nozzle includes the shower nozzle body, the shower nozzle body is equipped with central wind passageway, buggy strength transfer passage, whirl wind passageway and efflux wind passageway by inside to outside in proper order, efflux wind passageway includes axial efflux import and axial efflux export, the axial symmetry plane of axial efflux import is the curved surface that the Witoshibi curve formed. The nozzle of the pulverized coal burner improves the axial jet air pressure rise to reduce the primary air quantity and save coal resources; the axial jet flow wind and the rotational flow wind are independently controlled, so that the control is quicker and more flexible; the jet flow inlet structure design is optimized, the curved surface formed by the WittonsisBas curve is adopted, so that jet flow wind enters the jet hole more smoothly, the phenomena of small hole inlet eddy current and outflow necking are basically eliminated, the passing rate and efficiency of a jet flow wind nozzle are improved, and the power consumption of a fan is saved.
Description
Technical Field
The utility model relates to the technical field of pulverized coal burner nozzles, in particular to a pulverized coal burner nozzle.
Background
The rotary kiln coal powder burner is a device for providing heat energy into the kiln, and the pulverized coal after being ground is conveyed pneumatically, so that the pulverized coal is mixed with air strongly, the ignition speed is accelerated, and the pulverized coal is completely combusted under a certain controllable flame shape. The reasonable design of the burner nozzle has important significance for the stable, continuous and economic operation of the rotary kiln. The burner mainly uses the jet flow and the rotational flow generated by the nozzle to assist the central wind to wrap and disperse the coal wind to form flame with a reasonable shape, and the burner mainly heats the material in the rotary kiln in a radiation and convection mode. The primary air injected into the kiln by the nozzle is mainly injected into the kiln in a limited jet flow and rotational flow and pulverized coal pneumatic conveying mode, the pulverized coal and combustion air (a large amount of high-temperature air of about 1000 ℃ recovered from a grate cooler at the outlet of the rotary kiln is secondary air) are quickly and fully mixed through the strong entrainment and eddy flow action of the jet flow, and the secondary air with high temperature is sucked into a jet flow field generated by a combustor, so that the pulverized coal and the secondary air are fully contacted and mixed; the swirling flow plays a role in stabilizing flame and further mixing fuel with secondary air; the fan is adjusted to boost pressure to generate different jet flow and rotational flow strengths and form a controllable flame shape, so that the pulverized coal is fully mixed and rapidly combusted.
The prior art has the following defects: jet air and swirl air share one ventilation duct, the boost pressure of the jet air is reduced by 25 kPa-58.8 kPa, the boost pressure of the swirl air is higher by 25 kPa-58.8 kPa, the adjustment range is small, the adjustment reaction is not obvious, and the primary air volume is higher by 10% -12%; the solid-gas ratio of pneumatic conveying of pulverized coal is low, and the amount of compressed air for conveying is large, so that the amount of cold air entering a combustion system is large; the combustion system has large coal powder consumption and high thermal nitrogen oxide generated by combustion.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pulverized coal burner nozzle, which improves the axial jet air pressure rise to reduce the primary air quantity and save coal resources; the axial jet flow wind and the rotational flow wind are independently controlled, so that the control is quicker and more flexible; the jet inlet structural design is optimized, and the curved surface formed by the WittonsisBas curve is adopted, so that jet wind enters the jet hole more smoothly, the phenomena of small-hole inlet eddy and outflow necking are basically eliminated, and the power consumption of the fan is saved.
The embodiment of the utility model is realized by the following steps:
the embodiment of the application provides a pulverized coal burner nozzle, including the shower nozzle body, above-mentioned shower nozzle body is equipped with central wind passageway, buggy pneumatic conveyor channel, whirl wind channel and efflux wind channel by inside to outside in proper order, and above-mentioned efflux wind channel includes axial efflux import and axial efflux export, and the axial symmetry plane of above-mentioned axial efflux import is the curved surface that the victoris sinki curve formed.
In some embodiments of the present invention, an air cooling jacket is disposed outside the nozzle body, and the air cooling jacket and an outer surface of the nozzle body form a cooling air channel.
In some embodiments of the present invention, the air-cooling jacket has a heat dissipation groove.
In some embodiments of the present invention, the heat dissipation groove is circumferentially disposed along an inner sidewall of the air-cooling jacket.
In some embodiments of the present invention, the heat dissipation groove is disposed along a longitudinal extension direction of the air-cooling jacket.
In some embodiments of the present invention, the nozzle body further includes a nozzle plate, a swirling body inner tube, a pulverized coal nozzle inner tube, a central porous plate, and a central sleeve, the swirling air channel is an annular gap formed between an inner surface of the nozzle plate and an outer surface of the swirling body in a circumferential direction, and the swirling body is detachably connected to the swirling body inner tube.
In some embodiments of the utility model, the jet air passage is located at an end face of the nozzle plate.
In some embodiments of the present invention, a supporting plate is disposed outside the inner tube of the pulverized coal nozzle, and the supporting plate abuts against the inner wall of the inner tube of the swirling body.
In some embodiments of the present invention, the central air passage is a circumferential annular gap formed by the pulverized coal nozzle, an inner surface of an inner tube of the pulverized coal nozzle, and an outer surface of the central sleeve, and the central porous plate is fixedly connected to the central sleeve.
In some embodiments of the present invention, the pneumatic pulverized coal conveying channel is formed by annular gaps in the circumferential direction between the pulverized coal nozzle, the outer surface of the inner tube of the pulverized coal nozzle, the swirling body, and the inner surface of the inner tube of the swirling body.
Compared with the prior art, the embodiment of the utility model has at least the following advantages or beneficial effects:
a pulverized coal burner nozzle comprises a nozzle body, wherein the nozzle body is sequentially provided with a central air channel, a pulverized coal pneumatic conveying channel, a rotational flow air channel and a jet flow air channel from inside to outside, wherein rotational flow air is ejected at a speed of 150-180 m/s under 18-20 kPa at an angle of 30-40 degrees through the rotational flow air channel, so that the flame stabilizing effect is achieved, and the uniform mixing effect of high-temperature secondary air and pulverized coal is promoted to a certain extent; the central wind is sprayed out at a speed of 80-100 m/s through the central wind channel, and the effect of stabilizing flame is also achieved; the coal powder to be combusted can flow out through the coal powder pneumatic conveying channel to form coal air.
Meanwhile, the cyclone air channel and the jet air channel are mutually independent and are not communicated with each other, so that the cyclone air channel and the jet air channel can be independently provided with a fan, the spray head of the pulverized coal burner is large in adjustable range, and the adjusting effect is obvious.
The jet flow air channel comprises an axial jet flow inlet and an axial jet flow outlet, an axial symmetry plane of the axial jet flow inlet is a curved surface formed by a Wittonsisky curve, jet flow air is ejected from the jet flow outlet at subsonic speed or sonic speed through the jet flow inlet under the pressure rise of 70-98.8 kPa, the limited jet flow generates strong entrainment and mixing action in a limited space, a large amount of high-temperature secondary air is entrained into incident flow, pulverized coal is fully dispersed and quickly and uniformly mixed with the secondary air and is fully combusted, and meanwhile, the axial symmetry plane of the axial jet flow inlet is the curved surface formed by the Wittonsisky curve, so that the structural design of the jet flow air channel is optimized, the phenomena of inlet vortex and necking outflow are eliminated, the passing rate of the jet flow air nozzle is improved, and the power consumption of a fan is saved. The same effects of low wind pressure, high wind quantity and low wind speed can be achieved by using less wind quantity and higher wind speed in a high wind pressure state.
In conclusion, the nozzle of the pulverized coal burner forms an integral effect through the combined action of jet flow air, swirl flow air, coal air and central air to achieve the effects of coal saving and environmental protection under the condition of meeting production working conditions, axial flow boosting is improved to 70-98.8 kPa, primary air volume is reduced to 6-8%, cold air volume entering a combustion system is reduced, pulverized coal consumption of the combustion system is reduced, and thermal nitrogen oxide generated by combustion is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is an overall axial cross-sectional view of a pulverized coal burner head according to the present invention;
FIG. 2 is an overall radial cross-sectional view of a pulverized coal burner nozzle of the present invention;
FIG. 3 is an axial cross-sectional view of a jet air passage of a pulverized coal burner head of the present invention;
FIG. 4 is a schematic structural view of an air-cooling jacket of a pulverized coal burner nozzle according to the present invention;
FIG. 5 is a schematic view of a swirling flow body of a burner head of a pulverized coal burner according to the present invention.
Icon: 1-central air channel, 2-coal powder pneumatic conveying channel, 21-reduced section of coal powder pneumatic conveying channel, 22-outlet of coal powder pneumatic conveying channel, 3-cyclone air channel, 4-jet air channel, 5-cooling air channel, 100-central perforated plate, 101-central sleeve, 200-coal powder spray head, 201-inner pipe of coal powder spray head, 202-supporting plate, 300-cyclone body, 301-inner pipe of cyclone body, 302-chamfer, 303-cyclone air outlet, 304-spiral air fin, 400-nozzle plate, 401-axial jet inlet, 402-axial jet outlet, 500-air cooling sleeve and 501-radiating groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, or an orientation or a positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, and the indication or the suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, the present invention should not be construed as being limited.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
As shown in fig. 1, 2, 3, 4, and 5, the present embodiment provides a pulverized coal burner nozzle, which includes a nozzle body, where the nozzle body is sequentially provided with a central air channel 1, a pulverized coal pneumatic conveying channel 2, a cyclone air channel 3, and a jet air channel 4 from inside to outside, the jet air channel 4 includes an axial jet inlet 401 and an axial jet outlet 402, and an axial symmetry plane of the axial jet inlet 401 is a curved surface formed by a vittonsisky curve.
In the embodiment, the nozzle of the pulverized coal burner comprises a nozzle body, wherein the nozzle body is sequentially provided with a central air channel 1, a pulverized coal pneumatic conveying channel 2, a cyclone air channel 3 and a jet air channel 4 from inside to outside, wherein cyclone air is ejected at a speed of 150-180 m/s under 18-20 kPa pressure at an angle of 30-40 degrees through the cyclone air channel 3, so that the flame stabilizing effect is achieved, and the uniform mixing effect of high-temperature secondary air and pulverized coal is promoted to a certain extent; the central wind is sprayed out at a speed of 80-100 m/s through the central wind channel 1, and the effect of stabilizing flame is also achieved; the coal powder to be combusted can flow out through the coal powder pneumatic conveying channel 2 to form coal air.
Meanwhile, the cyclone air channel 3 and the jet air channel 4 are mutually independent and are not communicated with each other, so that the cyclone air channel 3 and the jet air channel 4 can be independently provided with a fan, the spray head of the pulverized coal burner is large in adjustable range, and the adjusting effect is obvious.
The jet flow air channel 4 comprises an axial jet flow inlet 401 and an axial jet flow outlet 402, an axial symmetry plane of the axial jet flow inlet 401 is a curved surface formed by a Wittonsisky curve, jet flow air is ejected from the jet flow outlet at subsonic speed or sonic speed through the jet flow inlet at the speed of 300-340 m/s under the pressure rise of 70-98.8 kPa, the limited jet flow generates strong entrainment and mixing action in a limited space, a large amount of high-temperature secondary air is entrained into incident flow, pulverized coal is fully dispersed and quickly and uniformly mixed with the secondary air and is fully combusted, meanwhile, the axial symmetry plane of the axial jet flow inlet 401 is a curved surface formed by the Wittonsisky curve, the structural design of the jet flow air channel 4 is optimized, the phenomena of inlet vortex and outflow necking are eliminated, the passing rate of a jet flow air nozzle is improved, and the power consumption of a fan is saved. The same effects of low wind pressure, high wind quantity and low wind speed can be achieved by using less wind quantity and higher wind speed in a high wind pressure state.
In conclusion, the nozzle of the pulverized coal burner forms an integral effect through the combined action of jet flow air, swirl flow air, coal air and central air to achieve the effects of coal saving and environmental protection under the condition of meeting production working conditions, axial flow boosting is improved to 70-98.8 kPa, primary air volume is reduced to 6-8%, cold air volume entering a combustion system is reduced, pulverized coal consumption of the combustion system is reduced, and thermal nitrogen oxide generated by combustion is reduced.
Example 2
As shown in fig. 1, 2, 3, 4 and 5, in this embodiment, in addition to embodiment 1, an air cooling jacket 500 is provided outside the head body, and the air cooling jacket 500 and the outer surface of the head body form a cooling air passage 5.
In this embodiment, the air cooling jacket 500 is provided outside the nozzle body, the air cooling jacket 500 can protect the nozzle body, so as to ensure the durability of the pulverized coal burner nozzle, the air cooling jacket 500 and the outer surface of the nozzle body form the cooling air channel 5, the cooling air can pass through the cooling air channel and be blown out, the nozzle body is protected and cooled, and the durability of the pulverized coal burner nozzle is ensured.
In some embodiments of the present embodiment, the air-cooling jacket 500 is provided with a heat dissipation groove 501.
In the above embodiment, the air cooling jacket 500 is provided with the heat dissipation grooves 501, the air cooling jacket 500 may be cast by heat-resistant steel, and the heat dissipation grooves 501 increase the heat dissipation area and can protect the nozzle body well.
In some embodiments of the present embodiment, the heat dissipation groove 501 is circumferentially disposed along an inner sidewall of the air-cooling jacket 500.
In the above embodiment, the heat dissipation groove 501 is circumferentially arranged along the inner side wall of the air cooling jacket 500, so that the heat dissipation contact area of the air cooling jacket 500 is further increased, the contact area between the cooling air duct and the cooling air is increased, the heat dissipation effect is enhanced, and the service life of the nozzle body is further ensured.
In some embodiments of the present embodiment, the heat dissipation groove 501 is disposed along a longitudinal extension direction of the air-cooling jacket 500.
In the above embodiment, the heat dissipation grooves 501 are arranged along the longitudinal extending direction of the air cooling sleeve 500, so that the space of the longitudinal extending direction of the air cooling sleeve 500 is fully utilized, the production and the processing are convenient, the heat exchange efficiency of the cooling air channel 5 and the cooling air is further improved, the reliability of the cooling air channel 5 and the cooling air for heat dissipation of the nozzle body is ensured, and the service life of the nozzle body is prolonged compared with that of a traditional combustion nozzle.
Example 3
As shown in fig. 1, 2, 3, 4, and 5, the nozzle body further includes a nozzle plate 400, a swirling body 300, a swirling body inner tube 301, a pulverized coal nozzle 200, a pulverized coal nozzle inner tube 201, a central porous plate 100, and a central casing 101, the swirling air passage 3 is an annular gap formed between an inner surface of the nozzle plate 400 and an outer surface of the swirling body 300 in a circumferential direction, and the swirling body 300 is detachably connected to the swirling body inner tube 301.
In the above embodiment, the nozzle body further includes a nozzle plate 400, a swirling body 300, a swirling body inner tube 301, a pulverized coal nozzle 200, a pulverized coal nozzle inner tube 201, a central porous plate 100, and a central casing 101, the swirling air channel 3 is an annular gap formed between an inner surface of the nozzle plate 400 and an outer surface of the swirling body 300 in a circumferential direction, and the outer surface of the swirling body 300 is provided with a spiral air fin 304, so that swirling air is generated when the air passes through the swirling body 300, an air inlet of the swirling body 300 is provided with a chamfer 302, so that resistance of the swirling body 300 is reduced, throughput is increased, fan capacity is fully utilized, and the swirling body 300 and the swirling body inner tube 301 are detachably connected by a screw thread; the coal powder nozzle 200 and the inner pipe 201 of the coal powder nozzle are connected by a detachable spigot and a fastening screw; the user can replace spare parts of the cyclone body 300 and the pulverized coal nozzle 200 at different angles according to different use conditions, and the device is convenient to replace, simple in structure and convenient to maintain.
Above-mentioned cyclone body 300 is connected for dismantling with above-mentioned cyclone body inner tube 301 for the user can be according to the in service behavior of difference, removable different cyclone body 300, and it is convenient to change, simple structure, pressure loss are low, reduce manufacturing cost and fan power consumption.
In some embodiments of this embodiment, a support plate 202 is disposed outside the inner pipe 201 of the pulverized coal nozzle, and the support plate 202 abuts against the inner wall of the inner cyclone body pipe 301.
In the above embodiment, the outer side of the inner pipe 201 of the pulverized coal nozzle is provided with the supporting plate 202, the supporting plate 202 is abutted against the inner wall of the inner pipe 301 of the swirling body, the number of the supporting plates 202 can be four, and the supporting plate 202 and the inner wall of the inner pipe 301 of the swirling body play a role in supporting the pulverized coal nozzle 200, so that the gap between the outlets 22 of the pulverized coal pneumatic conveying channels is uniform, pulverized coal is uniformly sprayed out, and the stability of combustion is ensured.
In some embodiments of this embodiment, the axial jet inlet is located inside the end face of the nozzle plate 400.
In some embodiments of this embodiment, the jet air passage 4 is located at an end face of the nozzle plate 400.
In the above embodiment, the jet outlet is located outside the end surface of the nozzle plate 400, and the pulverized coal injection nozzle 200 is detachably connected, so that the installation and replacement are convenient, and the maintainability of the burner nozzle is improved.
In some embodiments of the present invention, the central air passage 1 is a circumferential annular gap formed by the pulverized coal nozzle 200, an inner surface of the pulverized coal nozzle inner pipe 201, and an outer surface of the central casing 101, and the central porous plate 100 is fixedly connected to the central casing 101.
In the above embodiment, the central air duct 1 is a circumferential annular gap formed by the inner surface of the pulverized coal burner 200, the inner pipe 201 of the pulverized coal burner, and the outer surface of the central casing 101, the central perforated plate 100 is fixedly connected to the central casing 101, the central air is blown out from the end central perforated plate 100, and the central perforated plate 100 and the central casing 101 are welded and connected to each other so as to be drawn out along the central line during disassembly.
In some embodiments of the present invention, the pneumatic pulverized coal conveying passage 2 is formed by annular gaps in the circumferential direction between the outer surfaces of the pulverized coal injector 200 and the pulverized coal injector inner pipe 201, and the inner surfaces of the swirling body 300 and the swirling body inner pipe 301.
In the above embodiment, the pulverized coal pneumatic conveying channel 2 is formed by annular gaps in the circumferential direction between the pulverized coal nozzle 200, the outer surface of the pulverized coal nozzle inner tube 201, the swirling body 300 and the inner surface of the swirling body inner tube 301, the pulverized coal nozzle 200 and the pulverized coal nozzle inner tube 201 are connected by detachable seam allowance fastening screws, the outer diameter of the pulverized coal nozzle inner tube 201 is increased while the inner diameter of the swirling body inner tube 301 is reduced, the ventilation sectional area of the reduced section 21 of the pulverized coal pneumatic conveying channel is reduced, and the wind speed is increased; the sectional area of the outlet 22 of the pulverized coal pneumatic conveying channel is properly increased so as to properly reduce the wind speed. Under the condition of relatively small conveying air quantity, the expansion and dispersion effects are caused, so that the pulverized coal can be uniformly dispersed after being sprayed.
Example 4
As shown in fig. 1, 2, 3, 4, and 5, each two of the jet wind channels 4 are jet groups, and a plurality of the jet groups are uniformly distributed in the jet wind channels 4.
In the above embodiment, every two jet flow outlets are a jet flow group, a plurality of jet flow groups are uniformly distributed on the outer end surface of the axial flow channel nozzle plate 400, and a swirl air outlet 303 is provided inside each jet flow group, so that the axial jet flow and the swirl flow can be better converged, and the high-temperature secondary air can be effectively ensured to be converged and mixed along the interval between the circumferential jet flow and the swirl flow.
In summary, the embodiment of the utility model provides a pulverized coal burner nozzle, which comprises a nozzle body, wherein the nozzle body is sequentially provided with a central air channel 1, a pulverized coal pneumatic conveying channel 2, a swirling air channel 3 and a jet air channel 4 from inside to outside, wherein swirling air is ejected at a speed of 150-180 m/s under the pressure rise of 18 kPa-20 kPa at an angle of 30-40 degrees through the swirling air channel 3, so that the flame stabilizing effect is achieved, and the uniform mixing effect of high-temperature secondary air and pulverized coal is promoted to a certain extent; the central wind is sprayed out at a speed of 80-100 m/s through the central wind channel 1, and the effect of stabilizing flame is also achieved; the coal powder to be combusted can flow out through the coal powder pneumatic conveying channel 2 to form coal air.
Meanwhile, the cyclone air channel 3 and the jet air channel 4 are mutually independent and are not communicated with each other, so that the cyclone air channel 3 and the jet air channel 4 can be independently provided with a fan, the spray head of the pulverized coal burner is large in adjustable range, and the adjusting effect is obvious.
The jet flow air channel 4 comprises an axial jet flow inlet 401 and an axial jet flow outlet 402, an axial symmetry plane of the axial jet flow inlet 401 is a curved surface formed by a Wittonsisky curve, jet flow air is ejected from the jet flow outlet at subsonic speed or sonic speed through the jet flow inlet at the speed of 300-340 m/s under the pressure rise of 70-98.8 kPa, the limited jet flow generates strong entrainment and mixing action in a limited space, a large amount of high-temperature secondary air is entrained into incident flow, pulverized coal is fully dispersed and quickly and uniformly mixed with the secondary air and is fully combusted, meanwhile, the axial symmetry plane of the axial jet flow inlet 401 is a curved surface formed by the Wittonsisky curve, the structural design of the jet flow air channel 4 is optimized, the phenomena of inlet vortex and outflow necking are eliminated, the passing rate of a jet flow air nozzle is improved, and the power consumption of a fan is saved. The same effects of low wind pressure, high wind quantity and low wind speed can be achieved by using less wind quantity and higher wind speed in a high wind pressure state.
In conclusion, the nozzle of the pulverized coal burner forms an integral effect through the combined action of jet flow air, swirl flow air, coal air and central air to achieve the effects of coal saving and environmental protection under the condition of meeting production working conditions, axial flow boosting is improved to 70-98.8 kPa, primary air volume is reduced to 6-8%, cold air volume entering a combustion system is reduced, pulverized coal consumption of the combustion system is reduced, and thermal nitrogen oxide generated by combustion is reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pulverized coal burner nozzle is characterized in that: comprises a nozzle body;
the nozzle body is sequentially provided with a central air channel, a pulverized coal pneumatic conveying channel, a rotational flow air channel and a jet flow air channel from inside to outside;
the jet flow air channel comprises an axial jet flow inlet and an axial jet flow outlet, and the axial symmetry plane of the axial jet flow inlet is a curved surface formed by a Wittonsisky curve.
2. The pulverized coal burner nozzle as claimed in claim 1, characterized in that: the outer side of the spray head body is provided with an air cooling sleeve, and the air cooling sleeve and the outer surface of the spray head body form a cooling air channel.
3. The pulverized coal burner nozzle as claimed in claim 2, characterized in that: the air cooling sleeve is provided with a heat dissipation groove.
4. A pulverized coal burner injector as claimed in claim 3, characterized in that: the heat dissipation grooves are circumferentially arranged along the inner side wall of the air cooling sleeve.
5. A pulverized coal burner injector as claimed in claim 3, characterized in that: the heat dissipation grooves are arranged along the longitudinal extension direction of the air cooling sleeve.
6. The pulverized coal burner nozzle as claimed in claim 1, characterized in that: the nozzle body further comprises a nozzle plate, a cyclone body inner pipe, a coal powder nozzle inner pipe, a central porous plate and a central sleeve, the cyclone air channel is an annular gap formed between the inner surface of the nozzle plate and the outer surface of the cyclone body in the circumferential direction, and the cyclone body is detachably connected with the cyclone body inner pipe.
7. The pulverized coal burner nozzle as claimed in claim 6, characterized in that: the jet air channel is positioned on the end face of the nozzle plate.
8. The pulverized coal burner nozzle as claimed in claim 6, characterized in that: the outer side of the inner pipe of the pulverized coal nozzle is provided with a supporting plate, and the supporting plate is abutted to the inner wall of the inner pipe of the rotational flow body.
9. The pulverized coal burner nozzle as claimed in claim 6, characterized in that: the central air channel is a circumferential annular gap formed by the pulverized coal nozzle, the inner surface of the inner pipe of the pulverized coal nozzle and the outer surface of the central sleeve, and the central porous plate is fixedly connected with the central sleeve.
10. The pulverized coal burner nozzle as claimed in claim 6, characterized in that: the pulverized coal pneumatic conveying channel is formed by annular gaps of the pulverized coal nozzle, the outer surface of the inner pipe of the pulverized coal nozzle, the swirling flow body and the inner surface of the inner pipe of the swirling flow body in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157878.0U CN216346243U (en) | 2021-12-15 | 2021-12-15 | Pulverized coal burner nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157878.0U CN216346243U (en) | 2021-12-15 | 2021-12-15 | Pulverized coal burner nozzle |
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| CN216346243U true CN216346243U (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117704368A (en) * | 2024-01-19 | 2024-03-15 | 南京巨华工业技术有限公司 | Coal-saving burner |
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2021
- 2021-12-15 CN CN202123157878.0U patent/CN216346243U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117704368A (en) * | 2024-01-19 | 2024-03-15 | 南京巨华工业技术有限公司 | Coal-saving burner |
| CN117704368B (en) * | 2024-01-19 | 2024-06-18 | 南京巨华工业技术有限公司 | Coal-saving burner |
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