CN114135867A - Novel multi-channel combustor with outer axial flow air partition adjustment - Google Patents
Novel multi-channel combustor with outer axial flow air partition adjustment Download PDFInfo
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- CN114135867A CN114135867A CN202110951342.1A CN202110951342A CN114135867A CN 114135867 A CN114135867 A CN 114135867A CN 202110951342 A CN202110951342 A CN 202110951342A CN 114135867 A CN114135867 A CN 114135867A
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- 238000005192 partition Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000000638 solvent extraction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 230000008093 supporting effect Effects 0.000 abstract description 6
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000011162 core material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007363 ring formation reaction Methods 0.000 description 3
- 210000001015 abdomen Anatomy 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction 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
- F23D1/00—Burners for combustion of pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
The invention discloses a novel multi-channel combustor with outer axial flow air partition regulation, which comprises 5 annular channels, wherein a central air channel, an inner rotational flow air channel, an outer rotational flow air channel, a coal air channel and an outer axial flow air channel are sequentially arranged from inside to outside, the outer axial flow air channel comprises a first outer axial flow air arc-shaped channel and a second outer axial flow air arc-shaped channel which are vertically distributed, the sum of the radians of the two outer axial flow air arc-shaped channels is 360 degrees and is respectively connected with air inlet pipes, and an adjusting valve, an oxygen concentration sensor, an air flow sensor and a pressure sensor are respectively arranged on the two air inlet pipes. The two independent arc-shaped channels can independently adjust the pressure and the flow, so that the partitioned air supply of the outer axial flow air channel is realized, secondary air sucked from the lower part of the kiln opening of the rotary kiln can be better involved in flame to participate in combustion supporting, coal air can be more fully combusted, and a better combustion supporting effect is finally achieved, so that the combustion effect and the fuel burnout rate can be better improved.
Description
Technical Field
The invention relates to the technical field of combustion equipment, in particular to a novel multi-channel combustor with outer axial flow air partition regulation.
Background
The multi-channel combustor is a core combustion device widely applied to industrial kilns such as boilers, decomposing furnaces, heating furnaces, rotary kilns and the like, and has the functions of primarily combusting pulverized coal under the conveying and combustion supporting of primary air and then fully combusting and releasing heat under the combustion supporting of secondary air.
Since the multi-channel combustor is applied to a plurality of industrial fields such as steel, cement, chemical industry and the like, the multi-channel combustor has defects in working principle and structure, so that pulverized coal is not completely combusted, the flame shape is not good, and particularly in the cement industry, the coal consumption is high, the clinker quality is not stable, and the process quality problems such as skinning, ring formation, egg formation, yellow core materials and the like also occur.
The basic structure of the prior multi-channel combustor is sequentially provided with a central air channel, swirl air (inside and outside), coal air and external axial flow air from inside to outside, and the shape of flame is adjusted mainly by adjusting the flow and angle of the swirl air and the external axial flow air and forming a pair of acting forces for expansion and contraction limitation in the circumferential direction of the flame to adjust the proper shape of the flame. The problem with this adjustment is that: the shape of the flame in the circumferential direction (namely the flame diameter of each length position) is basically consistent, while the material of the rotary kiln is mainly concentrated in the lower area of the burning zone, the shape of the flame which is basically concentric and same in diameter at one length position cannot form a good burning effect, so that the kiln is difficult to operate, and therefore, the novel multi-channel combustor with the outer axial flow air partition regulation is provided.
Disclosure of Invention
The invention aims to provide a novel multi-channel combustor with outer axial flow air zone regulation, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel multichannel combustor with outer axial fan subregion is adjusted, includes 5 annular channel, is central wind passageway, interior whirl wind passageway, outer whirl wind passageway, coal wind passageway and outer axial fan passageway from inside to outside in proper order, outer axial fan passageway includes the outer axial fan arc passageway of first outer axial fan arc passageway and second that distributes from top to bottom, and the radian sum of two outer axial fan arc passageways is 360, the afterbody of the outer axial fan arc passageway of first outer axial fan arc passageway and second communicates respectively has the outer axial fan air-supply line of first outer axial fan air-supply line and second, installs governing valve, oxygen concentration sensor, air flow sensor, pressure sensor on two air-supply lines respectively. Through adopting above-mentioned technical scheme, through various sensors and governing valve independent installation separately among the first outer axial fan arc passageway and the second outer axial fan arc passageway pressure and flow are adjusted alone to the while, through different arc passageways, insert ordinary air and oxygen-enriched air respectively as required, form better combustion-supporting effect.
Preferably, the outer axial flow air main air inlet pipe is a two-way connecting pipe and is divided into a first outer axial flow air inlet pipe and a second outer axial flow air inlet pipe.
Preferably, the first outer axial flow air arc-shaped channel and the second outer axial flow air arc-shaped channel are divided by two outer axial flow air channel partition plates.
Preferably, a coal air channel sleeve is arranged outside the coal air channel, one side of the outer axial flow air channel partition plate is welded and fixed on the inner wall of the outer axial flow air channel sleeve, and the other side of the outer axial flow air channel partition plate is placed in a groove in the outer wall of the coal air channel sleeve.
Preferably, the outer axial flow air channel partition plate is in a strip shape and is made of stainless steel.
Preferably, the first outer axial flow air channel arc-shaped sealing component and the second outer axial flow air channel arc-shaped sealing component are fixedly provided with outer axial flow air nozzles. By adopting the technical scheme, different outer axial flow air jet flows are formed by arranging the outer axial flow air nozzles.
Preferably, the first outer axial flow air duct arc-shaped channel and the second outer axial flow air duct arc-shaped channel are independent arc-shaped channels. By adopting the technical scheme, the independent arc-shaped channel is convenient for independently accessing combustion-supporting air and adjusting the pressure flow.
Preferably, combustion air with different oxygen concentrations is fed into the first outer axial flow air arc-shaped channel and the second outer axial flow air arc-shaped channel. By adopting the technical scheme, the shape of the flame can be adjusted, and the combustion effect and the fuel burnout rate are improved.
Compared with the prior art, the invention has the beneficial effects that:
after the outer axial flow air channel is partitioned, combustion-supporting air with different oxygen concentrations can be fed into the two channels, so that the shape of the flame can be adjusted in a differentiation way in the circumferential direction, the flame is optimized from the original directly equal shape to the directly unequal shape in the circumferential direction, in particular, the shape of the flame which is flat at the top and protruded at the bottom can be formed, so that the lower belly of the flame can be better approached to the calcined material, and in addition, because the flow and the pressure of the lower area of the external axial flow air channel are smaller than those of the upper area, the secondary air sucked from the lower part of the kiln opening of the rotary kiln can be better involved in the flame to participate in combustion supporting, which is beneficial to more sufficient combustion of coal air and finally achieves better combustion supporting effect, thereby being beneficial to better improving the combustion effect and the fuel burnout rate, increasing the combustion temperature of a specified area and improving the calcination effect, thereby reducing the coal consumption and improving the clinker quality. Meanwhile, as the pulverized coal is fully combusted, the common problems of sintering process such as crusting, ring formation, yellow core material and the like are solved.
Drawings
FIG. 1 is a schematic structural diagram of the novel multi-channel combustor with external axial flow air zonal adjustment of the present invention;
fig. 2 is a schematic sectional structure diagram of the novel multi-channel combustor with outer axial flow air zone adjustment.
In the figure: 1. a central air duct; 2. an inner swirling air passage; 3. an outer swirling air passage; 4. a coal air channel; 5. an outer axial flow air nozzle; 6. an outer axial flow air passage sleeve; 7. a first outer axial wind channel; 8. a second outer axial wind channel; 9. an outer axial flow air channel baffle; 10. a first outer axial flow air inlet pipe; 11 a second external axial air inlet pipe; 12. adjusting a valve; 13. an oxygen concentration sensor; 14. an air flow sensor; 15. a pressure sensor; 16. the outer axial wind adjusting expansion joint; 17. the outer cyclone air adjusting expansion joint; 18. the inner cyclone air adjusting expansion joint; 19. a central air inlet pipe; 20. a coal air inlet pipe; 21. a primary air inlet main pipe; 22. coal air channel sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-2, the present invention provides a technical solution:
the utility model provides a novel multichannel combustor with outer axial fan subregion is adjusted, includes 5 annular channel, is central wind passageway 1, interior whirl wind passageway 2, outer whirl wind passageway 3, coal wind passageway 4 and outer axial fan passageway from inside to outside in proper order, outer axial fan passageway includes the outer axial fan arc passageway 8 of first outer axial fan arc passageway 7 and second that distributes from top to bottom, and the radian sum of two outer axial fan arc passageways is 360, first outer axial fan arc passageway 7 with the afterbody of the outer axial fan arc passageway 8 of second communicates respectively has outer axial fan air-supply line 10 of first outer axial fan and second 11, installs governing valve 12, oxygen concentration sensor 13, air mass flow sensor 14, pressure sensor 15 on two air-supply lines respectively. Through adopting above-mentioned technical scheme, through various sensors and governing valve regulation pressure and flow separately installed respectively in the outer axial fan arc passageway 7 of independent first outer axial fan arc passageway and the outer axial fan arc passageway 8 of second, through different arc passageways simultaneously, insert ordinary air and oxygen-enriched air respectively as required, form better combustion-supporting effect.
In order to ensure that the first outer axial flow air channel 7 and the second outer axial flow air channel 8 are completely divided, an outer axial flow air channel partition plate 9 is used for dividing the space between the first outer axial flow air arc-shaped channel 7 and the second outer axial flow air arc-shaped channel 8, one side of the outer axial flow air channel partition plate 9 is welded and fixed on the inner wall of the outer axial flow air channel sleeve 6, and the other side of the outer axial flow air channel partition plate is placed in a groove in the outer wall of the coal air channel sleeve 22.
The end parts of the first outer axial flow wind arc-shaped channel 7 and the second outer axial flow wind arc-shaped channel 8 are respectively and fixedly provided with an outer axial flow wind nozzle 5. Through the arrangement of the outer axial flow air nozzles 5, different outer axial flow air jet flows are formed.
According to the technical scheme, the working steps of the scheme are summarized and carded: the outer axial flow air channel of the multi-channel combustor is divided into a first outer axial flow air channel arc-shaped channel 7 and a second outer axial flow air channel arc-shaped channel 8 which are independent up and down, the arc-shaped channel of each region of the outer axial flow air is respectively connected into a first outer axial flow air inlet pipe 10 and a second outer axial flow air inlet pipe 11 which are independent according to the independent arc-shaped channels at the air inlet pipe connecting pipe at the tail part of the combustor, and the air inlet of the first outer axial flow air channel arc-shaped channel 7 and the air inlet of the second outer axial flow air channel arc-shaped channel 8 can be independently adjusted in pressure and flow through an adjusting valve 12. During operation and adjustment, the pressure and the flow of the lower area of the outer axial flow air are reduced, the strength of the ejected axial flow air is weaker than that of other areas, the swirl air can influence the flame to expand more in the lower area, so that the flame is closer to materials, and meanwhile, because the outer axial flow air at the lower part is weaker, secondary air sucked in a kiln opening of the rotary kiln can enter the flame to assist combustion faster and better in the lower part, so that coal air is combusted more quickly and fully, the condition of incomplete combustion of the coal air is obviously reduced, the clinker quality is finally improved, and the clinker coal consumption is reduced.
After the outer axial flow air channel is adjusted in a partition mode, the shape of flames can be adjusted in a differentiation mode in the circumferential direction, the original directly equal shape of the flames in the circumferential direction is optimized to be a directly unequal shape, particularly, the flames which are flat at the upper part and protrude at the lower part can be formed, so that the lower abdomen parts of the flames can be better close to calcined materials, in addition, the flow and the pressure of the lower area of the outer axial flow air are smaller than those of the upper area, secondary air sucked in the lower part of a kiln opening of the rotary kiln can be better involved in the flames to assist combustion, coal air can be combusted more fully, and a better combustion-supporting effect is achieved finally, so that the combustion effect and the fuel burn-out rate can be better improved, the combustion temperature of a specified area is improved, the calcination effect is improved, the coal consumption is reduced, and the clinker quality is improved. Meanwhile, as the pulverized coal is fully combusted, the common problems of sintering process such as crusting, ring formation, yellow core material and the like are solved.
Combustion air with different oxygen concentrations is fed into the first outer axial flow air arc-shaped channel 7 and the second outer axial flow air arc-shaped channel 8.
The partition plate 9 of the external axial air channel is in a strip shape and is made of stainless steel
The invention also comprises an outer axial flow air adjusting expansion joint 16, an outer rotational flow air adjusting expansion joint 17, an inner rotational flow air adjusting expansion joint 18, a central air inlet pipe 19, a coal air inlet pipe 20, a primary air inlet main pipe 21 and a coal air channel sleeve 22.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A novel multi-channel combustor with outer axial flow air partition regulation is characterized by comprising 5 annular channels which are a central air channel (1), an inner rotational flow air channel (2), an outer rotational flow air channel (3), a coal air channel (4) and an outer axial flow air channel from inside to outside in sequence, the outer axial flow wind channel comprises a first outer axial flow wind arc channel (7) and a second outer axial flow wind arc channel (8) which are distributed up and down, the sum of the radians of the two outer axial flow wind arc channels is 360 degrees, the tail parts of the first outer axial flow air arc-shaped channel (7) and the second outer axial flow air arc-shaped channel (8) are respectively communicated with a first outer axial flow air inlet pipe (10) and a second outer axial flow air inlet pipe (11), and the two air inlet pipes are respectively provided with a regulating valve (12), an oxygen concentration sensor (13), an air flow sensor (14) and a pressure sensor (15).
2. The new multichannel burner with external axial flow air zonal adjustment of claim 1, characterized in that: two outer axial flow air channel partition plates (9) are used for partitioning the space between the first outer axial flow air arc-shaped channel (7) and the second outer axial flow air arc-shaped channel (8).
3. The new multichannel burner with external axial flow air zonal adjustment as claimed in claim 2, characterized in that: the coal air channel (4) is externally provided with a coal air channel sleeve (22), one side of the outer axial flow air channel partition plate (9) is welded and fixed on the inner wall of the outer axial flow air channel sleeve (6), and the other side of the outer axial flow air channel partition plate is placed in a groove in the outer wall of the coal air channel sleeve (22).
4. The new multichannel burner with external axial flow air zonal adjustment of claim 1, characterized in that: the outer axial flow air channel partition plate (9) is in a strip shape.
5. The new multichannel burner with external axial flow air zonal adjustment of claim 1, characterized in that: and the end parts of the first outer axial flow wind arc-shaped channel (7) and the second outer axial flow wind arc-shaped channel (8) are respectively and fixedly provided with an outer axial flow wind nozzle (5).
6. The new multichannel burner with external axial flow air zonal adjustment of claim 1, characterized in that: the first outer axial flow wind arc-shaped channel (7) and the second outer axial flow wind arc-shaped channel (8) are independent arc-shaped channels.
7. The new multichannel burner with external axial flow air zonal adjustment of claim 1, characterized in that: and combustion air with different oxygen concentrations is fed into the first outer axial flow air arc-shaped channel (7) and the second outer axial flow air arc-shaped channel (8).
8. The new multichannel burner with external axial flow air zonal adjustment of claim 1, characterized in that: and combustion air with the same oxygen concentration is fed into the first outer axial flow air arc-shaped channel (7) and the second outer axial flow air arc-shaped channel (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951342.1A CN114135867A (en) | 2021-08-19 | 2021-08-19 | Novel multi-channel combustor with outer axial flow air partition adjustment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951342.1A CN114135867A (en) | 2021-08-19 | 2021-08-19 | Novel multi-channel combustor with outer axial flow air partition adjustment |
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| CN114135867A true CN114135867A (en) | 2022-03-04 |
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| CN202110951342.1A Pending CN114135867A (en) | 2021-08-19 | 2021-08-19 | Novel multi-channel combustor with outer axial flow air partition adjustment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000111011A (en) * | 1998-10-09 | 2000-04-18 | Mitsubishi Heavy Ind Ltd | Liquid fuel burner and furnace |
| CN103672886A (en) * | 2014-01-06 | 2014-03-26 | 南京凯盛国际工程有限公司 | Local oxygen-enriched combustor for cement kiln furnace |
| CN103791495A (en) * | 2014-02-25 | 2014-05-14 | 中国建筑材料科学研究总院 | Oxygen-rich and low-NOx pulverized coal burner and application thereof |
| CN206944143U (en) * | 2017-07-03 | 2018-01-30 | 郑州奥力旋窑热工机械制造有限公司 | Three rotation Five-channel burners |
-
2021
- 2021-08-19 CN CN202110951342.1A patent/CN114135867A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000111011A (en) * | 1998-10-09 | 2000-04-18 | Mitsubishi Heavy Ind Ltd | Liquid fuel burner and furnace |
| CN103672886A (en) * | 2014-01-06 | 2014-03-26 | 南京凯盛国际工程有限公司 | Local oxygen-enriched combustor for cement kiln furnace |
| CN103791495A (en) * | 2014-02-25 | 2014-05-14 | 中国建筑材料科学研究总院 | Oxygen-rich and low-NOx pulverized coal burner and application thereof |
| CN206944143U (en) * | 2017-07-03 | 2018-01-30 | 郑州奥力旋窑热工机械制造有限公司 | Three rotation Five-channel burners |
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Application publication date: 20220304 |