CN214840822U - Direct-fired ultralow nitrogen gas shower nozzle device - Google Patents
Direct-fired ultralow nitrogen gas shower nozzle device Download PDFInfo
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- CN214840822U CN214840822U CN202121114089.6U CN202121114089U CN214840822U CN 214840822 U CN214840822 U CN 214840822U CN 202121114089 U CN202121114089 U CN 202121114089U CN 214840822 U CN214840822 U CN 214840822U
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Abstract
The utility model relates to a direct-fired ultralow nitrogen gas shower nozzle device, including gas distribution section, awl section of thick bamboo, center section of thick bamboo, the stable spray gun and ignition needle of firing in center, the gas distribution section is connected in the rear end of awl section of thick bamboo, and center section of thick bamboo is connected in the front end of awl section of thick bamboo, and the stable spray gun that fires in center runs through in gas distribution section, awl section of thick bamboo and center section of thick bamboo to be located the three central line, be fixed with the whirl dish on the front end radial outside of the stable spray gun that fires in center is fixed with on the outside, ignition needle fixed mounting is in the upper portion outside the whirl dish; a plurality of external gas spray pipes are distributed on the gas distribution section at equal intervals to form external gas distribution rings which are arranged on the outer side of the conical cylinder; a plurality of middle gas spray pipes are arranged at equal intervals to form a middle gas distribution ring which is arranged on the inner side of the conical cylinder; the plurality of internal gas spray pipes are arranged at equal intervals to form an external gas distribution ring, and the external gas distribution ring is arranged on the inner side of the central cylinder and the outer side of the rotational flow disk. Has the advantages that: by adopting the mode of layering and sectional arrangement, the gas and the combustion air are reasonably configured, and the generation of nitrogen oxides is reduced.
Description
Technical Field
The utility model relates to a combustor technical field, in particular to direct combustion ultralow nitrogen gas shower nozzle device.
Background
Under the strong promotion of the national environmental protection policy, the low-nitrogen modification of the boiler is carried out as well as fiercely, and most of the modification adopts the current mainstream smoke external circulation technology. With the increase of the use amount of the ultra-low nitrogen combustor in the flue gas external circulation technology, a plurality of problems and disadvantages are reflected.
The smoke external circulation technology is characterized in that 15-20% of smoke is taken from a smoke outlet at the tail part of a boiler, enters an air inlet box, is mixed with fresh air and then is mixed with fuel to enter a hearth for combustion; the temperature of the hearth is reduced, and the generation of thermal NOx is reduced.
The flue gas external circulation technology generally has the defects of boiler efficiency loss, condensate water corrosion on pipelines to damage electronic components, high installation cost, complex control and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an above-mentioned technical problem who solves provides a direct combustion ultralow nitrogen gas shower nozzle device, and fuel passes through subregion, layering, draws and penetrates the technique, and combustion-supporting air is through high, low pressure and negative pressure distribution, makes the combustor satisfy ultralow nitrogen emission under the supplementary of the outer circulating device of flue gas that need not, and the operation is stable.
The technical scheme is that the direct-combustion ultralow-nitrogen gas nozzle device is characterized by comprising a gas distribution section, a conical cylinder, a central stable-combustion spray gun and an ignition needle, wherein the gas distribution section is connected to the rear end of the conical cylinder, the central cylinder is connected to the front end of the conical cylinder, the central stable-combustion spray gun penetrates through the gas distribution section, the conical cylinder and the central cylinder and is positioned on central lines of the gas distribution section, the conical cylinder and the central cylinder, a cyclone disc is fixed on the radially outer side of the front end of the central stable-combustion spray gun, and the ignition needle is fixedly installed on the upper part of the outer side of the cyclone disc; a plurality of external gas spray pipes, a plurality of middle gas spray pipes and a plurality of internal gas spray pipes are distributed from the gas distribution section, the external gas spray pipes are arranged at equal intervals to form an external gas distribution ring, the external gas distribution ring is arranged on the outer side of the conical barrel, and the nozzles of the external gas spray pipes extend forwards to exceed the front end of the central barrel; the plurality of middle gas spray pipes are arranged at equal intervals to form middle gas distribution rings, are arranged on the inner side of the conical cylinder, penetrate through a conical opening of the conical cylinder and extend to the front end of the central cylinder; the plurality of internal gas spray pipes are arranged at equal intervals to form external gas distribution rings, and the external gas distribution rings are arranged on the inner side of the central cylinder and on the outer side of the cyclone disc.
As a further improvement, the external gas jet pipe is composed of a gas jet pipe front section, a gas jet pipe middle section and a gas jet pipe rear section, the tail end of the gas jet pipe front section is connected with the gas jet pipe middle section after diameter reduction, the tail end of the gas jet pipe middle section is connected with the gas jet pipe rear section through 4 supporting plates, the tail end of the gas jet pipe middle section does not completely enter the gas jet pipe rear section, and a nozzle of the gas jet pipe rear section is an inclined nozzle to provide outer layer gas.
As a further improvement, the cone cylinder is installed in the gas distribution section through a cone cylinder installation flange, the cone cylinder is composed of a cone cylinder straight section, a cone cylinder large cone mouth and a cone cylinder small cone mouth, the cone cylinder straight section is connected with the cone cylinder large cone mouth, the cone cylinder small cone mouth can be movably adjusted forwards and backwards and connected onto the cone cylinder large cone mouth, and through holes for the middle gas spray pipe to pass through are formed in the cone cylinder large cone mouth and the cone cylinder small cone mouth.
As a further improvement, the front end port of the central cylinder is in a reduced caliber shape.
As a further improvement, the number of the external gas spray pipes, the number of the middle gas spray pipes and the number of the internal gas spray pipes are all 6.
Advantageous effects
The beneficial effects are that: the utility model discloses the center of device surely fires spray gun and combustion air is through adopting layering, segmentation to arrange the mode, and gas and combustion air configuration are reasonable, and the burning is stable, has solved flue gas extrinsic cycle technique boiler efficiency loss, comdenstion water corruption pipeline, has damaged defects such as electronic components and parts and installation cost height, control complicacy. Meanwhile, the temperature distribution of the hearth in the radial direction is uniform, and the temperature distribution of the hearth in the axial direction is uniform, so that the local high temperature of the hearth is effectively reduced, the generation of nitrogen oxides is reduced, and the requirement of low nitrogen emission is met.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic side view of the present invention;
fig. 2 is a schematic front view of the structure of the present invention;
FIG. 3 is a schematic structural view of an external gas nozzle of the present invention;
fig. 4 is a schematic structural view of the cone of the present invention;
fig. 5 is a schematic structural view of the front end of the central stable combustion spray gun of the present invention.
Reference numbers in the figures:
1. gas distribution section 2, cone
201. Straight section 202 of cone cylinder and large cone mouth of cone cylinder
203. Small cone mouth 3 of cone cylinder, central cylinder
4. Central stable combustion spray gun 401 and gas big jet hole
402. Gas small spray hole 5 and ignition needle
6. Swirl disk 7, external gas nozzle
701. Front end 702 of gas nozzle and middle section of gas nozzle
703. Gas nozzle back section 704, backup pad
705. Inclined nozzle 8 and middle gas spray pipe
9. Internal gas nozzle 10, main gas inlet
11. Fan flange 12 and boiler mounting plate
13. Conical cylinder mounting flange
Detailed Description
In order to further understand and appreciate the structural features and advantages of the present invention, preferred embodiments and the accompanying drawings are described in detail as follows:
as shown in fig. 1-2, a direct-fired ultra-low nitrogen gas nozzle device comprises a gas distribution section 1, a conical cylinder 2, a central cylinder 3, a central stable-combustion spray gun 4 and an ignition needle 5, wherein the gas distribution section 1 is connected to the rear end of the conical cylinder 2, the central cylinder 3 is connected to the front end of the conical cylinder 2, the central stable-combustion spray gun 4 penetrates through the gas distribution section 1, the conical cylinder 2 and the central cylinder 3 and is positioned on the central line of the three, a swirl disc 6 is fixed on the radial outer side of the front end of the central stable-combustion spray gun 4, and the ignition needle 5 is fixedly installed on the upper part of the outer side of the swirl disc 6; a plurality of external gas spray pipes 7, a plurality of middle gas spray pipes 8 and a plurality of internal gas spray pipes 9 are distributed from the gas distribution section 1, the plurality of external gas spray pipes 7 are arranged at equal intervals to form an external gas distribution ring, the external gas distribution ring is arranged on the outer side of the conical barrel 2, and the nozzle of the external gas spray pipe extends forwards to exceed the front end of the central barrel 3; a plurality of middle gas spray pipes 8 are arranged at equal intervals to form a middle gas distribution ring, are arranged on the inner side of the conical cylinder 2, penetrate through the conical opening of the conical cylinder 2 and extend to the front end of the central cylinder 3; the plurality of internal gas nozzles 9 are arranged at equal intervals to form an external gas distribution ring, and are arranged on the inner side of the central cylinder 3 and the outer side of the cyclone disk 6. When the combustion-supporting air-assisted fuel gas distributor is used, the combustion-supporting air is boosted and mixed by the fan, then sequentially enters the interior of the fuel gas distribution section 1, the conical opening of the conical barrel 2, the gap between the conical barrel 2 and the central barrel 3 and the central barrel 2, and is sprayed out from the gap between the central barrel 3 and the spinning disk 6 and the gap of the guiding spinning disk on the spinning disk 6; the gas is sprayed out through an external gas spray pipe 7, a middle gas spray pipe 8, an internal gas spray pipe 9 and a central stable combustion spray gun 4; when the fuel gas and the combustion-supporting air are reasonably proportioned, the fuel gas and the combustion-supporting air are delivered to a boiler furnace under the action of air pressure, and different smooth low-nitrogen combustion is formed in different areas of the furnace.
Specifically, as shown in fig. 1 and 3, the number of the outer gas nozzles 7, the number of the middle gas nozzles 8, and the number of the inner gas nozzles 9 are all 6. The lower portion of the gas distribution section 1 is communicated with a main gas inlet 10, two ends of the gas distribution section 1 are provided with fan connecting flanges 11 used for connecting a fan, the other end of the gas distribution section is provided with fan connecting flanges 12, an inner cavity of the gas distribution section 1 is internally provided with an annular interlayer, the annular interlayer is a gas distribution ring, 6 external gas spray pipes 7 extend out of a boiler mounting plate 12, and 6 middle gas spray pipes 8 and 6 internal gas spray pipes 9 are uniformly distributed on the gas distribution ring in a crossed mode.
Outside gas spray tube 7 provides outer gas, mainly by gas spray tube anterior segment 701, gas spray tube middle section 702 and gas spray tube back end 703 are constituteed, the end of gas spray tube anterior segment 701 is connected with gas spray tube middle section 702 after the undergauge, its purpose is in order to slow down the gas velocity of flow, avoid too much gas blowout to burn out the device, the end of gas spray tube middle section 702 is connected with gas spray tube back end 703 through 4 backup pads 704, and the end of gas spray tube middle section 702 is in getting into gas spray tube back end 703 completely, the spout of gas spray tube back end 703 is oblique jet 705, guide gas outwards spout as far as possible.
As shown in fig. 1 and 4, the cone cylinder 2 is installed in the gas distribution section 1 through the cone cylinder installation flange 13, the cone cylinder 2 is composed of a cone cylinder straight section 201, a cone cylinder large cone mouth 202 and a cone cylinder small cone mouth 203, the cone cylinder straight section 201 is connected with the cone cylinder large cone mouth 202, the cone cylinder small cone mouth 203 can be movably adjusted back and forth on the cone cylinder large cone mouth 201, the cone cylinder large cone mouth 202 and the cone cylinder small cone mouth 203 are respectively provided with a through hole for the middle gas spray pipe 8 to pass through, and 6 middle gas pipes 8 provide middle layer gas.
The front end port of the central cylinder 3 is in a reduced caliber shape, the airflow speed at the reduced port is accelerated, and the smoke backflow is increased; 6 internal gas nozzles 9 closely attached to the inner side of the central cylinder 3 for providing inner layer gas.
As shown in fig. 1 and 5, the central stable combustion spray gun 4 is arranged in the central cylinder 3, and 6 large fuel gas spray holes 401 and 12 small fuel gas spray holes 402 are radially and uniformly distributed at the front end of the central stable combustion spray gun 4 from inside to outside respectively to provide central stable combustion fuel gas.
The ignition needle 5 is provided with two symmetrically arranged on the rotational flow disk 6 and provides high-energy electric sparks and an ignition source.
The cyclone disk 6 is hollow and fixed on the central stable combustion spray gun 4, and the middle part is provided with 8 inclined blades; forming middle swirl combustion-supporting mixed air; and combustion-supporting mixed air is provided for the central stable-combustion spray gun 4 to stabilize central flame.
The utility model discloses a work flow:
the high-energy electric spark of the ignition needle 5 ignites the gas sprayed from the gas big nozzle 401 and the gas small nozzle 402 of the central stable combustion spray gun 4, and the gas is mixed with the combustion-supporting air provided by 8 oblique blades in the middle of the cyclone disk 6 to form an internal rotating combustible gas mixture, so that the central stable combustion flame is formed to be stably combusted at the front section of the hearth.
The central stable combustion flame formed by the central stable combustion spray gun 4 ignites the gas sprayed by 6 internal gas spray pipes 9 which are uniformly attached to the inner side of the central cylinder 3; the gap between the central cylinder 3 and the cyclone disk 6 is used for improving the combustion-supporting air speed; the formed internal flame is guided by a reduced opening at the front end of the central cylinder 3 to form inner layer flame which is stably combusted at the front section of the hearth.
The gap between the central cylinder 3 and the conical cylinder 2 is a high-speed combustion-supporting air outlet, and the combustion-supporting air wraps the inner flame at the front section of the hearth, so that the local high temperature generated by combustion at the front section of the hearth is effectively reduced. However, the radiant heat is enough to ignite the gas sprayed by 6 middle gas pipes 8 penetrating through the small cone opening of the cone cylinder, and the through holes on the cone cylinder 2 provide a small amount of combustion-supporting air for the gas, so that the gas forms middle-layer flame to stably burn in the middle section of the hearth.
The external gas nozzles 7 are uniformly distributed on the boiler mounting plate 12, gas enters the middle section 702 of the gas nozzle through the front section 701 of the nozzle at a low speed, and is sprayed into the rear section 703 of the gas nozzle at a high speed at the tail end of the middle section 702 of the gas nozzle, and under the injection principle, a large amount of smoke in a hearth is sucked into a gap between the middle section 702 of the gas nozzle and the rear section 703 of the gas nozzle to form a combustible gas mixture which is sprayed out from an inclined nozzle 705 of the rear section 703 of the gas nozzle with an outward radial angle; the flame of the middle layer is ignited by the radiant heat to form outer layer flame which is stably burnt at the rear section in the hearth.
The utility model discloses a spray gun and combustion air are surely fired at center is through adopting layering, segmentation to arrange the mode, and gas and combustion air configuration are reasonable, and the burning is stable, has solved flue gas extrinsic cycle technique boiler efficiency loss, comdenstion water corruption pipeline, has damaged defects such as electronic components and parts and installation cost height, control complicacy. Meanwhile, the temperature distribution of the hearth in the radial direction is uniform, and the temperature distribution of the hearth in the axial direction is uniform, so that the local high temperature of the hearth is effectively reduced, the generation of nitrogen oxides is reduced, and the requirement of low nitrogen emission is met.
In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications of the shapes, structures, features and spirit described in the claims of the present invention should be included in the scope of the present invention.
Claims (5)
1. A direct-combustion ultralow-nitrogen gas nozzle device is characterized by comprising a gas distribution section, a conical barrel, a central stable-combustion spray gun and an ignition needle, wherein the gas distribution section is connected to the rear end of the conical barrel, the central barrel is connected to the front end of the conical barrel, the central stable-combustion spray gun penetrates through the gas distribution section, the conical barrel and the central barrel and is positioned on the central lines of the gas distribution section, the conical barrel and the central barrel, a swirl disc is fixed on the radially outer side of the front end of the central stable-combustion spray gun, and the ignition needle is fixedly installed on the upper part of the outer side of the swirl disc; a plurality of external gas spray pipes, a plurality of middle gas spray pipes and a plurality of internal gas spray pipes are distributed from the gas distribution section, the external gas spray pipes are arranged at equal intervals to form an external gas distribution ring, the external gas distribution ring is arranged on the outer side of the conical barrel, and the nozzles of the external gas spray pipes extend forwards to exceed the front end of the central barrel; the plurality of middle gas spray pipes are arranged at equal intervals to form middle gas distribution rings, are arranged on the inner side of the conical cylinder, penetrate through a conical opening of the conical cylinder and extend to the front end of the central cylinder; the plurality of internal gas spray pipes are arranged at equal intervals to form external gas distribution rings, and the external gas distribution rings are arranged on the inner side of the central cylinder and on the outer side of the cyclone disc.
2. The direct-combustion ultralow-nitrogen gas nozzle device according to claim 1, wherein the external gas nozzle pipe is composed of a gas nozzle pipe front section, a gas nozzle pipe middle section and a gas nozzle pipe rear section, the tail end of the gas nozzle pipe front section is connected with the gas nozzle pipe middle section after diameter reduction, the tail end of the gas nozzle pipe middle section is connected with the gas nozzle pipe rear section through 4 support plates, the tail end of the gas nozzle pipe middle section does not completely enter the gas nozzle pipe rear section, and a nozzle of the gas nozzle pipe rear section is an inclined nozzle to provide outer layer gas.
3. The direct-fired ultralow-nitrogen gas nozzle device according to claim 1, wherein the cone is mounted in the gas distribution section through a cone mounting flange, the cone is composed of a cone straight section, a cone large cone mouth and a cone small cone mouth, the cone straight section is connected with the cone large cone mouth, the cone small cone mouth is movably connected with the cone large cone mouth in a front-back adjustable manner, and through holes for the middle gas nozzle to pass through are formed in the cone large cone mouth and the cone small cone mouth.
4. The direct-fired ultra-low nitrogen gas showerhead device according to claim 1, wherein the front end port of the central cylinder is of reduced caliber.
5. The direct-fired ultra-low nitrogen gas nozzle device according to claim 1, wherein the number of the outer gas nozzles, the number of the middle gas nozzles and the number of the inner gas nozzles are all 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121114089.6U CN214840822U (en) | 2021-05-21 | 2021-05-21 | Direct-fired ultralow nitrogen gas shower nozzle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121114089.6U CN214840822U (en) | 2021-05-21 | 2021-05-21 | Direct-fired ultralow nitrogen gas shower nozzle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214840822U true CN214840822U (en) | 2021-11-23 |
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ID=78776164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121114089.6U Active CN214840822U (en) | 2021-05-21 | 2021-05-21 | Direct-fired ultralow nitrogen gas shower nozzle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214840822U (en) |
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2021
- 2021-05-21 CN CN202121114089.6U patent/CN214840822U/en active Active
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