CN214581053U - Burner and boiler - Google Patents
Burner and boiler Download PDFInfo
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- CN214581053U CN214581053U CN202120145398.3U CN202120145398U CN214581053U CN 214581053 U CN214581053 U CN 214581053U CN 202120145398 U CN202120145398 U CN 202120145398U CN 214581053 U CN214581053 U CN 214581053U
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Abstract
The utility model relates to the technical field of energy-saving and environment-friendly equipment, and provides a burner and a boiler, wherein the burner comprises a mounting plate, an outer barrel is vertically arranged on the mounting plate, and an inner barrel which longitudinally and convexly extends out of the outer barrel is embedded in the outer barrel; the central spray pipe sequentially and longitudinally penetrates through the inner cylinder and the outer cylinder, a first drainage part transversely extending towards the direction of the opening edge of the inner cylinder is formed at the free end of the central spray pipe, and a gas circulation gap for the gas in the inner cylinder to circulate through the opening of the inner cylinder is formed in the first drainage part; and the second drainage part is transversely arranged at the opening of the inner cylinder and is parallel to the first drainage part at intervals. The utility model provides a material such as the metal that the furnace chamber regional temperature that current combustor spun flame made to be close to the combustor shower nozzle is low, kept away from the combustor shower nozzle leads to the inboard insulation material of furnace wall and the furnace wall outside high receives expend with heat and contract with cold and produce crack, the tired problem of metal to help reducing the nitrogen oxide content in the waste gas that the boiler burning produced, have energy-concerving and environment-protective effect.
Description
Technical Field
The utility model relates to an energy-concerving and environment-protective equipment technical field especially relates to a combustor and boiler.
Background
Industrial boilers, tunnel kilns, and large industrial heaters are generally provided with a burner using natural gas (mainly containing methane) or oil or other fossil fuel as fuel, and generate heat by combustion. The prior art burners basically adopt the diffusion combustion technology, and a main spray gun and a cyclone disk are usually arranged in the burners. The natural gas is preheated in the first half section of the main spray gun, and then the natural gas and the air are mixed and combusted. However, the gas burner with the structure still has higher NO in tail gasXThe problem (2) does not meet the national requirements of energy conservation, emission reduction and environmental protection. The low-nitrogen burner is one kind of burner with the aim of reducing the generation of NO harmful to environment during combustionX(i.e., oxynitride).
As shown in fig. 1, the flame a emitted from the conventional burner head 10 is a jet flame, so that the temperature of the region a1 in the furnace chamber 110 close to the burner head 10 is low, and the temperature of the region a2 in the furnace chamber 110 far from the burner head 10 is high, which causes problems such as cracking and metal fatigue of materials such as heat insulating materials on the inner side of the boiler wall of the boiler 11 and metals on the outer side of the boiler wall due to thermal expansion and contraction.
In view of the above, there is a need for an improved low-nitrogen burner in the prior art to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a combustor and boiler to solve combustor spun flame among the prior art and make the furnace chamber regional temperature who is close to the combustor shower nozzle low, keep away from the combustor shower nozzle high furnace chamber regional temperature that leads to materials such as the inboard insulation material of brickwork and the metal in the brickwork outside receive expend with heat and contract with cold and produce crack, the tired problem of metal.
In order to achieve the above object, the present invention provides a burner, including:
the mounting plate is vertically provided with an outer cylinder, and an inner cylinder longitudinally protruding out of the outer cylinder is embedded in the outer cylinder;
the central spray pipe sequentially and longitudinally penetrates through the inner cylinder and the outer cylinder, a first drainage part transversely extending towards the direction of the opening edge of the inner cylinder is formed at the free end of the central spray pipe, and a gas circulation gap for the gas in the inner cylinder to circulate through the opening of the inner cylinder is formed in the first drainage part; and the number of the first and second groups,
and the second drainage part is transversely arranged at the opening of the inner barrel and is parallel to and spaced from the first drainage part.
As a further improvement of the present invention, the gas flow gap is configured as a longitudinal through hole formed by the first flow guiding part near the open inner wall of the inner tube, wherein the first flow guiding part extends to the inner wall of the inner tube; or the like, or, alternatively,
the gas circulation gap is configured to be a preset gap formed between the first drainage part and the inner wall of the opening of the inner barrel.
As a further improvement of the present invention, the second drainage portion is less than or equal to the predetermined gap from the inner wall longitudinal extension line of the inner tube.
As a further improvement of the utility model, the second drainage part is close to the position in gas circulation space is formed with vertical gas pocket.
As a further improvement of the present invention, the first drainage portion is oriented toward one side of the second drainage portion and the opening of the inner tube is flush, and the first drainage portion is perpendicular to the central axis of the central nozzle.
As a further improvement of the utility model, the inner cylinder is sleeved inside the outer cylinder and penetrates through the bottom of the outer cylinder; or the inner cylinder part is sleeved in the outer cylinder.
As a further improvement, the outer cylinder is kept away from the one end of the mounting plate forms a radial shrinkage ring part which shrinks radially inwards, and the opening edge of the radial shrinkage ring part is greater than the transverse distance of the outer wall of the inner cylinder.
As a further improvement of the present invention, the first drainage portion is configured as an annular drainage plate, the second drainage portion is configured as a circular drainage plate, and the first drainage portion and the second drainage portion are connected through a connecting member.
As a further improvement of the present invention, the outer cylinder is provided with a plurality of radially disposed connecting plates between the inner cylinders, and the connecting plates are extended to the inner wall surface of the radially contracted ring portion along the longitudinal extending direction of the outer cylinder.
The utility model also provides a boiler, boiler configuration at least one the combustor.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a free end spun gas of combustor through lighting central spray tube, and make the flame that lights the gas and form with central spray tube free end form to the horizontal effect of the second drainage portion of extending of the uncovered border direction of inner tube parallel interval arrangement down to the periphery along the direction burning of second drainage portion, thereby form the annular side direction flame that is close to and burns to the brickwork inboard, make the inboard temperature of brickwork more even, prevent that combustor spun flame from making the regional temperature of furnace chamber that is close to the combustor shower nozzle low, the regional temperature of furnace chamber of keeping away from the combustor shower nozzle height leads to the insulating material of brickwork inboard and the metal such as the metal in the brickwork outside to receive expend with heat and contract with cold and produce the crack, metal fatigue scheduling problem takes place.
Drawings
FIG. 1 is a schematic diagram of a flame emitted by a burner of the prior art;
FIG. 2 is a schematic block diagram of a burner according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of one embodiment in the direction of PP in FIG. 2;
FIG. 4 is a schematic cross-sectional view of another embodiment in the direction of PP in FIG. 2, without showing the structure of the ignition electrode and the ignition needle;
FIG. 5 is an enlarged schematic block diagram at B in FIG. 3, in which some of the reference numerals are shown;
FIG. 6 is an enlarged schematic block diagram at B in FIG. 3, in which further reference numerals are indicated;
FIG. 7 is a schematic cross-sectional view taken in the direction E-E of FIG. 3, in which only the structures of the inner and outer barrels are shown;
fig. 8 is a schematic structural view of an air inducing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The first embodiment is as follows:
an embodiment of a burner according to the present invention is disclosed with reference to fig. 2 to 8.
Before describing a burner of the present invention in detail, it is necessary to explain the related technical concept. The burner disclosed in this embodiment is horizontally butted by components corresponding to the view angles shown in fig. 3 and fig. 8 (or fig. 4 and fig. 8), and is embedded and installed in the furnace wall 100 of fig. 3 or fig. 4, wherein the outer cylinder 21 of fig. 3 or fig. 4 is spliced and communicated with the burner body 30 of fig. 8. The furnace wall 100 may be part of a boiler. In the present embodiment, the term "low nitrogen" has the technical meaning equivalent to the term "low nitrogen oxide" (low NOx). The term "gas" refers to a flowable and combustible gas, and in this embodiment, the applicant selects natural gas (the main component of which is methane, CH)4) For exemplary purposes, the terms "gas" and "natural gas" are used in this embodiment to refer to equivalent technical features.
In the present embodiment, the burner disclosed in the present embodiment includes, as described with reference to fig. 2 to 7: the mounting plate 20, the outer cylinder 21 of vertical arrangement of the mounting plate 20, and the outer cylinder 21 inlays and has inner cylinders 22 projecting out of the outer cylinder 21 longitudinally; a central nozzle 23 sequentially and longitudinally penetrating the inner cylinder 22 and the outer cylinder 21, wherein a first flow guide part 231 transversely extending towards the edge direction of the opening 221 of the inner cylinder 22 is formed at the free end of the central nozzle 23, and a gas flowing gap 232 for the gas (the gas is air) in the inner cylinder 22 to flow through the opening 221 of the inner cylinder 22 is formed at the first flow guide part 231; and a second flow guiding part 24 which is transversely arranged at the opening of the inner cylinder 22 and is arranged in parallel with the first flow guiding part 231 at an interval. Specifically, the mounting plate 20 has a circular shape, and a plurality of mounting holes 201 are formed in the mounting plate 20 to be attached to the inner wall surface of the furnace wall 100 through the mounting holes 201 by bolts (not shown) for reliable connection, thereby mounting the entire burner on the inner wall surface of the furnace wall 100. Meanwhile, the outer cylinder 21, the inner cylinder 22, the central nozzle 23, the first flow guiding part 231, the second flow guiding part 24 and other solid components are all made of heat-resistant stainless steel alloy which can bear the temperature of more than 1200 ℃. As shown in fig. 3 or 4, a heat insulating material partially wrapping the outer tube 21 may be provided outside the outer tube 21. Specifically, the heat-insulating material is prepared by mixing asbestos ropes, refractory clay and the like. Also, the free end of the outer cylinder 21 and the inner cylinder 22 longitudinally protruding from the outer cylinder 21 both extend into the cavity 220.
Wherein, one end of the outer cylinder 21 far away from the mounting plate 20 forms a radial shrinkage ring part 211 which shrinks radially inwards, and the transverse distance between the opening edge of the radial shrinkage ring part 211 and the outer wall of the inner cylinder 22 is greater than the gas circulation gap 232. The first drainage portion 231 is configured as an annular drainage plate, the second drainage portion 24 is configured as a circular drainage plate, and the first drainage portion 231 and the second drainage portion 24 are connected by a connecting member 25. The connecting member 25 may be configured as a connecting column or other members that can connect the first drainage portion 231 and the second drainage portion 24 at a distance. A plurality of radially disposed connecting plates 27 are disposed between the outer cylinder 21 and the inner cylinder 22, and the connecting plates 27 extend along the longitudinal extension direction of the outer cylinder 21 to the inner wall surface of the radially constricted ring portion 211. Further, the connecting plate 27 extends to the open edge of the collar portion 211 in the longitudinal extension direction of the outer cylinder 21. One side of the first flow guiding part 231 facing the second flow guiding part 24 is flush with the opening 221 of the inner cylinder 22, and the first flow guiding part 231 is perpendicular to the central axis DD of the central nozzle 23.
The burner of this embodiment further comprises an ignition electrode 26 arranged close to and parallel to the central lance 23, the ignition electrode 26 extending over the flame-stabilizing disc first tapping 231 and forming an ignition needle 261 bent radially inwards so as to ignite the natural gas flowing horizontally in the central lance 23 along arrow 230 through the ignition needle 261 to ignite the region between the first tapping 231 and the second tapping 24.
The burner of this embodiment ignites by firing gas which is injected towards the free end of the central nozzle 23 in the direction indicated by the arrow 230 in figure 5, and the flame formed by igniting the gas is burnt towards the periphery of the second flow guiding part 24 under the action of the second flow guiding part 24 which is arranged in parallel with the first flow guiding part 231 formed by the free end of the central spray pipe 23 and transversely extends towards the direction of the opening edge of the inner cylinder 22 at intervals, thereby form to the inboard annular side direction flame C that is close to and burns of brickwork for the temperature in the furnace chamber 220 is more even, prevents that combustor spun flame from making the regional temperature of flame that is close to the combustor shower nozzle low, the regional temperature of flame that keeps away from the combustor shower nozzle high lead to the insulating material of brickwork inboard and the material such as metal in the brickwork outside receive expend with heat and contract with cold and produce the problem emergence of crack, metal fatigue, thereby reach energy-concerving and environment-protective purpose. The fuel gas in the present embodiment is natural gas.
Moreover, because the first drainage part 231 and the second drainage part 24 are arranged in parallel at intervals, the flame ignited in the area between the first drainage part 231 and the second drainage part 24 forms the annular lateral flame C which is not only close to the inner side of the furnace wall for combustion, but also close to the area near the opening 221 of the inner cylinder 22 in the furnace chamber 220 for combustion, therefore, the annular lateral flame C can fully combust the gas in the area near the opening 221 of the inner cylinder 22 in the furnace chamber 220, the phenomenon that a large amount of nitrogen oxides are generated due to insufficient combustion caused by low temperature of the area near the opening 221 of the inner cylinder 22 in the furnace chamber is prevented, the purpose of reducing the nitrogen oxides in the waste gas in the area near the opening 221 of the inner cylinder 22 is effectively achieved, the content of the nitrogen oxides in the waste gas generated by combustion of the boiler is reduced, and the effects of energy conservation and environmental protection are achieved. Therefore, the burner of the embodiment can solve the problem that in the prior art, due to the fact that the temperature of the furnace chamber area close to the burner nozzle is low, combustion is insufficient, and a large amount of nitrogen oxides are generated, caused by the fact that jet flow flame sprayed by the burner, so that the purpose of environmental protection is achieved.
The burner is connected to an air induction device 40 shown in fig. 8. The function of the air inducing device 40 is to suck air containing oxygen (oxygen content is about 21%) from the outside. The air inducing device 40 includes a burner body 30, a motor 32, a controller 31, and a hood 33 communicating with the motor 32. A valve (not shown) for controlling the air flow is provided in the hood 33. The controller 31 can be a single chip or a PLC controlled control hardware to control the rotation speed and the operation time of the motor 32. The controller 31 and the motor 32 are both connected to the mains supply. Specifically, in this embodiment, the controller 31 is a siemens LMV intelligent controller or a C51 series single chip microcomputer, and the controller 31 may also be configured as a PLC controller or the like.
An output shaft (not shown) of the motor 32 is provided with blades at a portion of the hood 33 to form an air flow 300 by rotation of the blades. The air flow 300 may penetrate the burner body 30, and forms an air flow shown by an arrow 300a and an air flow shown by an arrow 300b under the action of the outer cylinder 21 and the inner cylinder 22, respectively. An air inlet 34 is formed at the bottom of the fan housing 33, and air in the outside enters the fan housing 33 along an arrow 303. The air flow 300 simultaneously passes into the annular cavity 200a formed by the outer cylinder 21 and the inner cylinder 22 and the annular cavity 200b formed by the central nozzle 23 and the inner cylinder 22. The air plays a combustion supporting role in the combustion process of the natural gas.
The mounting plate 20 connects the burner body 30 and the gas delivery manifold 301. The interior of the burner body 30 is a hollow structure and is connected with a gas delivery main pipe 301, and a gas pipeline 302 is arranged in the burner body 30. Gas line 302 communicates with central nozzle 23 to deliver natural gas into central nozzle 23. Wherein natural gas is passed in the direction indicated by arrow g into gas delivery manifold 301 for passage into central nozzle 23. A valve (not shown) for controlling the flow of gas is provided in the gas delivery manifold 301.
In the above-mentioned embodiments, referring to fig. 3, 5 and 6, the gas flow gap 232 is configured as a preset gap 232a formed by the first flow guide 231 and the inner wall of the opening 221 of the inner cylinder 22. Wherein, the transverse distance L2 between the second drainage part 24 and the longitudinal extension line of the inner wall of the inner cylinder 22 is less than or equal to the transverse distance L1 of the preset gap 232 a. So set up, make the annular side direction flame C that the region between first drainage portion 231 and second drainage portion 24 was ignited and was formed further be close to the furnace wall inner wall, with further make the temperature in the furnace chamber 220 more even, thereby further prevent that combustor spun flame makes the flame zone temperature that is close to the combustor shower nozzle low, keep away from the flame zone temperature of combustor shower nozzle high and lead to materials such as the insulating material of furnace wall inboard and the metal of furnace wall outside to receive expend with heat and contract with cold and produce the crack, metal fatigue scheduling problem takes place. In addition, the gas in the area of the furnace chamber 220 close to the opening 221 of the inner tube 22 can be fully combusted, and the generation of a large amount of nitrogen oxides due to insufficient combustion caused by low temperature of the area of the furnace chamber close to the opening 221 of the inner tube 22 can be prevented.
In another embodiment, as shown in fig. 4, the gas flow gap 232 is configured as a longitudinal through hole 232b formed by the first flow guide 231 near the inner wall of the opening 221 of the inner tube 22, wherein the first flow guide 231 extends to the inner wall of the inner tube 22. That is, the first flow guiding part 231 covers the opening 221 of the inner cylinder 22, and the air in the annular cavity 200b is supplied to flow to the area between the first flow guiding part 231 and the second flow guiding part 24 through the longitudinal through hole 232b formed by the first flow guiding part 231, so as to support the annular lateral flame C. Wherein, a longitudinal air hole 241 can be formed at a position of the second flow guiding part 24 close to the air flowing gap 232. With this arrangement, the flame ignited in the area between the first flow guiding portion 231 and the second flow guiding portion 24 can be partially dissipated into the cavity 220 through the longitudinal air holes 241, so as to heat the cavity 220 from different angles by matching with the annular lateral flame C which is close to the combustion inside the furnace wall, thereby further making the temperature in the cavity 220 uniform.
In any of the above embodiments, the inner cylinder 22 is sleeved inside the outer cylinder 21 and extends to the mounting plate 20 (or the inner cylinder 22 extends to the bottom of the outer cylinder 21, not shown in the figure) to communicate with the air inducing device 40. The air flow 300 simultaneously enters an annular cavity 200a formed by the outer cylinder 21 and the inner cylinder 22 and an annular cavity 200b formed by the central nozzle 23 and the inner cylinder 22, so that the air flow shown by an arrow 300a and the air flow shown by an arrow 300b respectively flow into the furnace chamber 220 to assist the combustion of the natural gas in the combustion process. As shown in fig. 3 or fig. 4, part of the inner cylinder 22 can be sleeved in the outer cylinder 21, and the inner cylinder 22 is communicated with the outer cylinder 21, so that the structure of the burner is simplified, and the purposes of energy conservation and environmental protection are achieved.
In the present embodiment, the "longitudinal direction" refers to the x-axis direction in fig. 3, and the "lateral direction" refers to the y-axis direction in fig. 3.
Example two:
based on a burner as disclosed in the first embodiment, a boiler is also disclosed in this embodiment, which is provided with at least one burner as disclosed in the first embodiment.
The boiler according to the present embodiment generally refers to a device that can generate heat by burning natural gas or other combustible gas as fuel gas in the burner according to the first embodiment. The device can be an industrial steam boiler, and also can be a tunnel kiln and a large-scale industrial heater.
Please refer to the description of the first embodiment, and details thereof are not repeated herein.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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. Any reference sign in a claim should not 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 (10)
1. A burner, comprising:
the mounting plate is vertically provided with an outer cylinder, and an inner cylinder longitudinally protruding out of the outer cylinder is embedded in the outer cylinder;
the central spray pipe sequentially and longitudinally penetrates through the inner cylinder and the outer cylinder, a first drainage part transversely extending towards the direction of the opening edge of the inner cylinder is formed at the free end of the central spray pipe, and a gas circulation gap for the gas in the inner cylinder to circulate through the opening of the inner cylinder is formed in the first drainage part; and the number of the first and second groups,
and the second drainage part is transversely arranged at the opening of the inner barrel and is parallel to and spaced from the first drainage part.
2. The burner of claim 1,
the gas circulation gap is configured as a longitudinal through hole formed by the first flow guiding part close to the inner wall of the opening of the inner cylinder, wherein the first flow guiding part extends to the inner wall of the inner cylinder; or the like, or, alternatively,
the gas circulation gap is configured to be a preset gap formed between the first drainage part and the inner wall of the opening of the inner barrel.
3. The burner of claim 2,
the transverse distance between the second drainage part and the longitudinal extension line of the inner wall of the inner barrel is smaller than or equal to the preset gap.
4. The burner of claim 2,
and a longitudinal air hole is formed at the position of the second drainage part, which is close to the air circulation gap.
5. The burner of claim 1,
one side of the first drainage part, which faces the second drainage part, is flush with the opening of the inner barrel, and the first drainage part is perpendicular to the central axis of the central spray pipe.
6. The burner of claim 1,
the inner cylinder is sleeved in the outer cylinder and extends to the mounting plate; or the like, or, alternatively,
the inner cylinder part is sleeved in the outer cylinder.
7. The burner according to any one of claims 1 to 6,
the urceolus is kept away from the one end of mounting panel forms the radial ring portion that contracts inwards, just the opening border of the ring portion that contracts of footpath with the lateral distance of inner tube outer wall is greater than the gas circulation space.
8. The burner of claim 7,
the first drainage part is configured into an annular drainage plate, the second drainage part is configured into a circular drainage plate, and the first drainage part is connected with the second drainage part through a connecting piece.
9. The burner of claim 7,
and a plurality of radially arranged connecting plates are arranged between the outer cylinder and the inner cylinder, and the connecting plates extend to the inner wall surface of the reduced diameter ring part along the longitudinal extension direction of the outer cylinder.
10. A boiler, characterized in that it is provided with at least one burner according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120145398.3U CN214581053U (en) | 2021-01-20 | 2021-01-20 | Burner and boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120145398.3U CN214581053U (en) | 2021-01-20 | 2021-01-20 | Burner and boiler |
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| Publication Number | Publication Date |
|---|---|
| CN214581053U true CN214581053U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120145398.3U Active CN214581053U (en) | 2021-01-20 | 2021-01-20 | Burner and boiler |
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| CN (1) | CN214581053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728532A (en) * | 2021-01-20 | 2021-04-30 | 瓦兰热能设备(无锡)有限公司 | Burner and boiler |
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2021
- 2021-01-20 CN CN202120145398.3U patent/CN214581053U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728532A (en) * | 2021-01-20 | 2021-04-30 | 瓦兰热能设备(无锡)有限公司 | Burner and boiler |
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