CN110864293A - Steady burner and low-heat-value gas burner - Google Patents
Steady burner and low-heat-value gas burner Download PDFInfo
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- CN110864293A CN110864293A CN201911340149.3A CN201911340149A CN110864293A CN 110864293 A CN110864293 A CN 110864293A CN 201911340149 A CN201911340149 A CN 201911340149A CN 110864293 A CN110864293 A CN 110864293A
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 65
- 239000003381 stabilizer Substances 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 129
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 27
- 239000002737 fuel gas Substances 0.000 abstract description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 230000003111 delayed effect Effects 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to the field of combustors and discloses a combustion stabilizer and a low-calorific-value combustor. The fuel gas is fed in by stages through the fuel gas outer channel and the fuel gas inner channel, the combustion-supporting air is fed in by stages through the air outer channel and the air inner channel, and oxygen required by the initial ignition of the low-calorific-value fuel gas is provided through the air inner channel, so that the ignition and the ignition are facilitated; the plurality of gas outer channels and the plurality of air inner channels are alternately distributed in the circumferential direction, so that the contact area of gas provided by the gas outer channels and combustion air provided by the air inner channels is increased, and the combustion air and the gas are favorably mixed to ignite; the air outer channel is used for providing oxygen required by the low-calorific-value fuel gas to burn out, and the mixing of combustion air and fuel gas provided by the air outer channel is delayed, so that a local lacking area is created in the central area of the combustor, and the generation of nitrogen oxides is favorably reduced.
Description
Technical Field
The invention relates to the field of combustors, in particular to a combustion stabilizer and a low-calorific-value gas combustor.
Background
The low-calorific-value gas is widely applied to gas boilers, and energy conversion application is realized. However, the low calorific value gas has the defects of high content of inert gas, low calorific value, difficult ignition, poor combustion stability and the like, and meanwhile, an unreasonable combustion organization can form local high temperature and the retention time of excessive combustion air in a high temperature area is long, so that the generation amount of nitrogen oxides (NOx) exceeds the standard.
At present, a double-swirl gas burner is widely used, combustion air required by gas combustion is fed once, and the purposes of combustion enhancement and flame stabilization are realized through axial or tangential guide vanes. However, the adoption of the double-cyclone gas burner can increase the ignition heat required at the initial stage of gas combustion, influence the ignition of gas, and enable the gas to be always in an oxygen-enriched environment in the combustion process of the gas, thereby causing high NOx generation concentration. Therefore, the double swirl gas burner cannot solve the problem of high NOx concentration.
Disclosure of Invention
The invention aims to provide a combustion stabilizer and a low-calorific-value gas burner, which can stabilize combustion and reduce the generation amount of nitrogen oxides.
In order to achieve the purpose, the invention adopts the following technical scheme:
a flame stabilizer comprising a plurality of outer air passages for conveying air, and:
the air outer channels are sleeved outside a cylindrical space defined by the air inner channels;
the gas outer channels are used for conveying gas, and the gas outer channels and the air inner channels are alternately distributed in the circumferential direction.
As a preferable technical scheme of the above combustion stabilizer, the combustion stabilizer further comprises a gas inner channel, and a plurality of gas outer channels are circumferentially arranged along the outer peripheral wall of the gas inner channel;
the end surface of the gas inner channel positioned at the downstream of the gas flowing direction is an inner gas downstream end surface, the end surface of the air inner channel positioned at the downstream of the combustion air flowing direction is an inner air downstream end surface, the end surface of the gas outer channel positioned at the downstream of the gas flowing direction is an outer gas downstream end surface, and the end surface of the air outer channel positioned at the downstream of the combustion air flowing direction is an outer air downstream end surface;
the inner gas downstream end face, the inner gas downstream end face and the outer gas downstream end face are all located in the same plane.
As a preferable technical solution of the above combustion stabilizer, the inner air downstream end surface and the outer air downstream end surface are located on the same plane, or located upstream of the outer air downstream end surface.
As a preferred technical solution of the above combustion stabilizer, the air inner channel is a spiral channel extending along an air flowing direction and rotating circumferentially along the gas inner channel, and/or the gas outer channel is a spiral channel extending along a gas flowing direction and rotating circumferentially along the gas inner channel, and/or the air outer channel is a spiral channel extending along an air flowing direction and rotating circumferentially along the gas inner channel.
As a preferable technical solution of the above combustion stabilizer, along the air flow direction, the area of a radial cross section of the air outer channel perpendicular to the central axis thereof gradually increases;
and/or, in the air flow direction, the area of the radial section of the air inner channel perpendicular to the central axis thereof is gradually reduced;
and/or the area of the radial section of the gas outer channel perpendicular to the central axis of the gas outer channel is gradually increased along the flowing direction of the gas.
As a preferable technical solution of the above-mentioned flame stabilizer, at least one of the gas inner channel, the gas outer channel, the air outer channel, and the air inner channel is provided with swirl vanes therein.
As a preferred technical scheme of the above combustion stabilizer, the combustion stabilizer further comprises a gas pipeline, a plurality of second outer bulges which extend axially along the gas pipeline and are circumferentially distributed at intervals are convexly arranged on the outer peripheral wall of the gas pipeline, each second outer bulge is provided with a gas outer channel which is axially communicated along the second outer bulge, and an inner cavity of the gas pipeline forms the gas inner channel.
As a preferred technical scheme of the above combustion stabilizer, the combustion stabilizer further comprises a combustion air duct, wherein a plurality of first outer protrusions which extend axially along the outer peripheral wall of the combustion air duct and are distributed circumferentially at intervals are convexly arranged on the outer peripheral wall of the combustion air duct, and each first outer protrusion is provided with a combustion air outer channel which penetrates axially along the first outer protrusion;
the combustion-supporting air pipeline is characterized in that a plurality of first inner bulges which extend along the axial direction of the combustion-supporting air pipeline and are distributed at intervals along the circumferential direction of the combustion-supporting air pipeline are arranged on the inner peripheral wall of the combustion-supporting air pipeline in a protruding mode, and each first inner bulge is provided with a combustion-supporting air inner channel which is communicated along the axial direction of the first inner bulge.
The invention also provides a low-heating-value gas burner which comprises the flame stabilizer.
As a preferred technical scheme of the low-calorific-value gas burner, the low-calorific-value gas burner further comprises a premixing channel and a flow guide channel which are sequentially arranged at the downstream of the flame stabilizer;
the premixing channel is arranged in a gradually reducing mode along the air flowing direction, and the flow guide channel is arranged in a gradually expanding mode along the air flowing direction.
The invention has the beneficial effects that: the fuel gas is fed in by stages through the fuel gas outer channel and the fuel gas inner channel, and simultaneously the combustion-supporting air is fed in by stages through the air outer channel and the air inner channel, so that oxygen required by the initial ignition of the low-calorific-value fuel gas is provided through the air inner channel, and the ignition are facilitated; meanwhile, the plurality of gas outer channels and the plurality of air inner channels are alternately distributed in the circumferential direction, so that the contact area of the gas provided by the gas outer channels and the combustion air provided by the air inner channels is increased, and the combustion air and the gas are favorably mixed and ignited; the air outer channel is used for providing oxygen required by complete burnout of the low-calorific-value fuel gas, and mixing of the low-calorific-value fuel gas and the fuel gas through the air outer channel is delayed, so that a local lacking area is created in the central area of the combustor, and generation of nitrogen oxides is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low heating value gas burner provided in an embodiment of the present invention;
fig. 2 is a front view of a low heating value gas burner provided in accordance with an embodiment of the present invention;
fig. 3 is a sectional view of a flame stabilizer provided in accordance with an embodiment of the present invention, taken along a radial section perpendicular to a central axis thereof.
In the figure:
11. an air outer channel; 12. an air inner passage; 13. a first outer protrusion;
21. a gas outer channel; 22. a gas inner channel;
3. a flow guide channel; 4. a gas channel; 5. a combustion air passage; 6. a premix passage.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
As shown in fig. 1 to 3, the present embodiment provides a combustion stabilizer, which includes a combustion air conduit and a gas conduit that penetrates through the combustion air conduit and is coaxially arranged with the combustion air conduit, wherein a plurality of first outer protrusions 13 that extend axially along the outer peripheral wall of the combustion air conduit and are circumferentially distributed at intervals are convexly arranged on the outer peripheral wall of the combustion air conduit, and each first outer protrusion 13 is provided with a combustion air outer channel 11 that penetrates axially along the outer peripheral wall; the inner peripheral wall of the combustion-supporting air pipeline is convexly provided with a plurality of first inner bulges which extend along the axial direction of the combustion-supporting air pipeline and are distributed along the circumferential direction at intervals, and each first inner bulge is provided with a combustion-supporting air inner channel 12 which is communicated along the axial direction of the first inner bulge.
The periphery wall epirelief of gas pipeline is equipped with along its axial extension and along its circumference interval distribution's a plurality of second outer archs, all is equipped with along its axial through's gas outer passageway 21 on every second outer arch, and the inner chamber of gas pipeline forms the interior passageway 22 of gas. In this embodiment, the number of the gas outer passages 21, the air outer passages 11 and the air inner passages 12 is equal.
In other embodiments, the inner peripheral wall of the gas pipeline may be recessed outward to form a plurality of circumferentially distributed gas outer channels 21, the inner cavity of the gas pipeline forms a gas inner channel 22, and at this time, the gas outer channel 21 and the gas inner channel 22 are communicated; meanwhile, the peripheral wall of the gas pipeline is inwards sunken to form a plurality of circumferentially distributed air inner channels 12, and the arrangement also realizes circumferential alternate arrangement of the gas outer pipeline and the air inner channels 12.
In the embodiment, the fuel gas is fed in by stages through the fuel gas outer channel 21 and the fuel gas inner channel 22, meanwhile, the combustion-supporting air is fed in by stages through the air outer channel 11 and the air inner channel 12, and oxygen required by the initial ignition of the low-calorific-value fuel gas is provided through the air inner channel 12, so that the ignition and the ignition are facilitated; meanwhile, the plurality of gas outer channels 21 and the plurality of air inner channels 12 are alternately arranged in the circumferential direction, so that the contact area of the gas provided by the gas outer channels 21 and the combustion air provided by the air inner channels 12 is increased, and the combustion air and the gas are mixed and ignited; the air outer channel 11 is used for providing oxygen required by complete burnout of the low-calorific-value fuel gas, and mixing of the low-calorific-value fuel gas and the fuel gas through the air outer channel 11 is delayed, so that a local lacking area is created in the central area of the combustor, and generation of nitrogen oxides is reduced.
Preferably, the air outer channels 11 and the air inner channels 12 are alternately arranged along the circumferential direction of the gas pipeline, that is, the air outer channels 11 and the gas outer channels 21 are arranged opposite to each other.
Further, in the present embodiment, an end surface of the gas inner passage 22 located downstream in the gas flow direction is referred to as an inner gas downstream end surface, an end surface of the air inner passage 12 located downstream in the gas flow direction is referred to as an inner air downstream end surface, an end surface of the gas outer passage 21 located downstream in the gas flow direction is referred to as an outer gas downstream end surface, and an end surface of the air outer passage 11 located downstream in the combustion air flow direction is referred to as an outer air downstream end surface.
The inner gas downstream end face, the inner air downstream end face, the outer gas downstream end face and the outer air downstream end face are located on the same plane. In other embodiments, the inner air downstream end surface and the outer air downstream end surface can be positioned on the same plane and are positioned at the upstream of the outer air downstream end surface, so that combustion air provided by the air outer channel is delayed in the axial direction to be mixed with fuel gas, the oxygen amount in the central area of the combustor is further reduced, and the generation amount of nitrogen oxides is reduced.
Further, in the present embodiment, the air inner channel 12 is a spiral channel extending along the air flowing direction and rotating along the circumferential direction of the gas inner channel 22, the gas outer channel 21 is a spiral channel rotating along the circumferential direction of the gas inner channel 22, and the air outer channel 11 is a spiral channel extending along the air flowing direction and rotating along the circumferential direction of the gas inner channel 22. By adopting the arrangement, the fluid flowing out through the downstream outlet of the air outer channel 11, the downstream outlet of the air inner channel 12, the downstream outlet of the fuel gas inner channel 22 and the downstream outlet of the fuel gas outer channel 21 flows out in the form of rotary jet flow, so that the formation of a central backflow area is enhanced, the high-temperature flue gas in a furnace cavity is sucked in an enhanced manner, and the combustion of the low-calorific-value fuel gas is further stabilized.
Further, in the present embodiment, the gas duct and the combustion air duct form a gas outer channel 21, an air inner channel 12 and an air outer channel 11 which are distributed in a tooth shape. In the air flow direction, the area of the radial section of the air outer passage 11 perpendicular to the central axis thereof gradually increases, and the area of the radial section of the air inner passage 12 perpendicular to the central axis thereof gradually decreases; the area of the radial cross section of the gas outer passage 21 perpendicular to the central axis thereof gradually increases in the gas flow direction. By adopting the combustion stabilizer provided by the embodiment, when the low-heat-value gas combustor works, a plurality of radial, axial and radial backflow regions are formed on the back flow surface of each channel, and due to the special flow field distribution, the entrainment capacity of the central backflow region is strong, a large amount of high-temperature flue gas can be entrained, the low-heat-value gas and the backflow high-temperature flue gas are mixed strongly, and the heating of the low-heat-value gas by the high-temperature flue gas is strengthened; and the multiple backflow areas provide stable heat sources for ignition and combustion of the low-heat-value fuel gas, and are favorable for ignition and stable combustion. The gas pipeline and the combustion air pipeline form a gas outer channel 21, an air inner channel 12 and an air outer channel 11 which are distributed in a tooth shape.
In this embodiment, when each of the air outer passage 11, the air inner passage 12, and the gas outer passage 21 rotates in the circumferential direction of the gas inner passage 22, the angle between the tangential direction of the rotation direction of each passage and the central axis of the gas inner passage 22 is 0 ° to 45 °.
As shown in fig. 1 and fig. 2, the present embodiment further provides a low-calorific-value gas burner, which includes the above-mentioned flame stabilizer, and a premixing channel 6 and a diversion channel 3 sequentially disposed downstream of the flame stabilizer; the premixing channel 6 is arranged in a gradually reducing mode along the air flowing direction, and the flow guide channel 3 is arranged in a gradually expanding mode along the air flowing direction.
The low-calorific-value gas burner further comprises a combustion air channel 5 and a gas channel 4 penetrating through the combustion air channel 5, wherein the combustion air channel 5 is located at the upstream of the combustion air pipeline and is simultaneously communicated with the air outer channel 11 and the air inner channel 12, and the gas channel 4 is located at the upstream of the gas pipeline and is simultaneously communicated with the gas inner channel 22 and the gas outer channel 21.
The low-calorific-value gas burner further comprises an ignition tube, one end of the ignition tube extends into the gas inner channel 22 and is coaxially arranged with the gas inner channel 22, and an igniter is arranged in the ignition tube.
Example two
The difference of other embodiments of this embodiment lies in that all being equipped with swirl blade in gas inner channel 22, gas outer channel 21, the outer passageway of air 11 and the interior passageway of air 12, increased the whirl intensity of air and gas, strengthened central backward flow district, strengthened inhaling interior high temperature flue gas of furnace, further stabilized the burning of low calorific value gas.
The rotating directions of any two of the cyclone blades can be the same or different, and are not particularly limited, and the rotating angle of the cyclone blades is approximately 10-50 degrees. Preferably, the rotation angle of the swirl vane is greater than or equal to the included angle between the tangential direction of the rotation direction of each channel and the central axis of the gas inner channel 22, so as to further improve the swirl strength of the fluid ejected from each channel.
The fuel gas in this embodiment may be low calorific value gas such as blast furnace gas and converter gas, or may be a mixed gas of a plurality of kinds including high calorific value gas. In this embodiment, the optimal settings of the internal and external combustion air classification ratio, the number of the external air channels 11, the number of the external gas channels 21, the number of the internal air channels 12, the included angle between the tangential direction of the rotation direction of each channel and the central axis of the internal gas channel 22, and the rotation angle and the number of the swirl vanes need to be calculated and determined by numerical simulation according to low-calorific-value gas with different qualities, so as to form a proper mixing process and a proper recirculation zone shape, thereby ensuring that the burner has the functions of strong stable combustion and low-content nitrogen oxide generation.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 in specific cases to those skilled in the art.
Claims (10)
1. A burner, characterized by comprising a plurality of outer air channels (11) for conveying air, and:
the air-conveying device comprises a plurality of air inner channels (12) and an air outer channel (11), wherein the air inner channels (12) are used for conveying air, and the air outer channel (11) is sleeved outside a cylindrical space surrounded by the air inner channels (12);
the gas outer channels (21) are used for conveying gas, and the gas outer channels (21) and the air inner channels (12) are alternately arranged in the circumferential direction.
2. The burner according to claim 1, further comprising a gas inner channel (22), a plurality of said gas outer channels (21) being circumferentially arranged along an outer peripheral wall of said gas inner channel (22);
the end face of the gas inner channel (22) located at the downstream of the gas flowing direction is an inner gas downstream end face, the end face of the air inner channel (12) located at the downstream of the combustion air flowing direction is an inner air downstream end face, the end face of the gas outer channel (21) located at the downstream of the gas flowing direction is an outer gas downstream end face, and the end face of the air outer channel (11) located at the downstream of the combustion air flowing direction is an outer air downstream end face;
the inner gas downstream end face, the inner gas downstream end face and the outer gas downstream end face are all located in the same plane.
3. The burner of claim 2, wherein the inner air downstream end face is in the same plane as the outer air downstream end face or upstream of the outer air downstream end face.
4. The burner according to claim 2, characterized in that the inner air channel (12) is a helical channel extending in the air flow direction and rotating circumferentially along the inner gas channel (22), and/or in that the outer gas channel (21) is a helical channel extending in the gas flow direction and rotating circumferentially along the inner gas channel (22), and/or in that the outer air channel (11) is a helical channel extending in the air flow direction and rotating circumferentially along the inner gas channel (22).
5. The burner according to claim 2, characterized in that the area of the radial section of the air outer channel (11) perpendicular to its central axis increases progressively in the direction of air flow;
and/or, in the air flow direction, the area of a radial section of said air inner channel (12) perpendicular to its central axis is gradually reduced;
and/or the area of the radial section of the gas outer channel (21) perpendicular to the central axis thereof is gradually increased along the gas flow direction.
6. The burner according to claim 2, characterized in that swirl vanes are provided in at least one of the gas inner channel (22), the gas outer channel (21), the air outer channel (11) and the air inner channel (12).
7. The combustion stabilizer according to any one of claims 2 to 6, further comprising a gas conduit, wherein a plurality of second outer protrusions extending axially along the gas conduit and distributed circumferentially at intervals are convexly arranged on the outer peripheral wall of the gas conduit, each second outer protrusion is provided with the gas outer channel (21) penetrating axially along the second outer protrusion, and an inner cavity of the gas conduit forms the gas inner channel (22).
8. The combustion stabilizer according to any one of claims 2 to 6, further comprising a combustion air duct, wherein a plurality of first outer protrusions (13) extending axially along the outer peripheral wall of the combustion air duct and distributed at intervals circumferentially along the outer peripheral wall of the combustion air duct are convexly arranged on the outer peripheral wall of the combustion air duct, and each first outer protrusion (13) is provided with the combustion air outer channel (11) penetrating axially along the outer peripheral wall;
the combustion-supporting air pipeline is characterized in that a plurality of first inner bulges which extend along the axial direction of the combustion-supporting air pipeline and are distributed along the circumferential direction of the combustion-supporting air pipeline at intervals are arranged on the inner peripheral wall of the combustion-supporting air pipeline in a protruding mode, and each first inner bulge is provided with a combustion-supporting air inner channel (12) which penetrates through along the axial direction of the first inner bulge.
9. A low heating value gas burner comprising a flame stabilizer according to any one of claims 1 to 8.
10. The low heating value gas burner of claim 9, further comprising a premixing passage (6) and a flow guide passage (3) which are sequentially arranged at the downstream of the flame stabilizer;
the premixing channel (6) is arranged in a gradually-reducing mode along the air flowing direction, and the flow guide channel (3) is arranged in a gradually-expanding mode along the air flowing direction.
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| CN201911340149.3A CN110864293A (en) | 2019-12-23 | 2019-12-23 | Steady burner and low-heat-value gas burner |
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| CN201911340149.3A CN110864293A (en) | 2019-12-23 | 2019-12-23 | Steady burner and low-heat-value gas burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339795A (en) * | 2021-05-31 | 2021-09-03 | 武汉理工大学 | Circumferential cyclone multistage premixing low-nitrogen combustor |
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| CN103672967A (en) * | 2012-09-05 | 2014-03-26 | 株式会社日立制作所 | Gas turbine combustor |
| WO2016046074A1 (en) * | 2014-09-26 | 2016-03-31 | Innecs B.V. | Burner |
| CN106439808A (en) * | 2016-09-27 | 2017-02-22 | 上海华之邦科技股份有限公司 | Flame stable-burning device for gas burner |
| CN206347546U (en) * | 2016-11-29 | 2017-07-21 | 武汉都市环保工程技术股份有限公司 | Low-heat value gas combustion device and low calorific value coal gas boiler |
| CN108954309A (en) * | 2018-08-15 | 2018-12-07 | 山东中科天健环保科技有限公司 | A kind of novel low nitrogen oxide burner structure |
| CN211232870U (en) * | 2019-12-23 | 2020-08-11 | 烟台龙源电力技术股份有限公司 | Steady burner and low-heat-value gas burner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339795A (en) * | 2021-05-31 | 2021-09-03 | 武汉理工大学 | Circumferential cyclone multistage premixing low-nitrogen combustor |
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