CN216079778U - Multi-channel oxygen-enriched combustion-supporting burner for rotary kiln - Google Patents
Multi-channel oxygen-enriched combustion-supporting burner for rotary kiln Download PDFInfo
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- CN216079778U CN216079778U CN202121942090.8U CN202121942090U CN216079778U CN 216079778 U CN216079778 U CN 216079778U CN 202121942090 U CN202121942090 U CN 202121942090U CN 216079778 U CN216079778 U CN 216079778U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a multi-channel oxygen-enriched combustion-supporting burner for a rotary kiln, which comprises a multi-channel burner body, wherein the outermost part of the multi-channel burner body is an outer axial flow air sleeve, the outer side of the lower part of the outer axial flow air sleeve is fixedly connected with an arc-shaped external oxygen-enriched channel sleeve, an arc-shaped flow deflector is arranged between the outer axial flow air sleeve and the external oxygen-enriched channel sleeve, two supporting blocks are arranged between the arc-shaped flow deflector and the external oxygen-enriched channel sleeve, an arc-shaped external oxygen-enriched air channel is formed between the arc-shaped flow deflector and the outer axial flow air sleeve, the thickness of the arc-shaped flow deflector is gradually reduced from the end to the tail, and the radians of the external oxygen-enriched air channel, the arc-shaped flow deflector and the external oxygen-enriched channel sleeve are the same and are all 10-180 degrees. The utility model can form arc-shaped, flat, uniform oxygen-enriched air flow with a proper angle and a proper range at the bottom of the lower abdomen of the flame formed by the burner, and the uniform oxygen-enriched air flow is directionally and accurately sprayed into a specified area, so that the directional oxygen-enriched air is used for supporting combustion, and a better combustion-supporting effect is achieved.
Description
Technical Field
The utility model relates to the technical field of combustion equipment, in particular to a multi-channel oxygen-enriched combustion-supporting combustor for a rotary kiln.
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.
Oxygen-enriched air has the advantages of effectively improving combustion efficiency, combustion temperature, burnout rate and the like, but the oxygen-enriched air also has many problems in the combustion application process, for example, the oxygen-enriched air is directly added from a primary air pipeline system, a secondary air pipeline system and a tertiary air pipeline system, although the combustion efficiency is effectively improved, the addition amount of the oxygen-enriched air is large, the comprehensive economic benefit is not good, and the investment recovery period generally exceeds 15 years.
An oxygen-enriched air channel is added to the multi-channel combustor, so that oxygen-enriched air and primary air (mainly inner cyclone air and outer axial flow air) participate in combustion supporting together, and the technical idea is better, but the oxygen-enriched air channels added to the multi-channel combustor are all arranged between the cyclone air channels (with the inner cyclone air channels and the outer cyclone air channels) and the outer axial flow air channels at present, or the oxygen-enriched air is directly mixed and input into the cyclone air or the outer axial flow air channels. The technical route has two main disadvantages: firstly, a relatively concentrated high-temperature area cannot be formed directly on a material layer to be calcined, which is not beneficial to better improving the calcining efficiency; second combustion process NOxThe amount of the produced (C) is remarkably increased.
Disclosure of Invention
The utility model aims to provide a multi-channel oxygen-enriched combustion-supporting burner for a rotary kiln, which solves the problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a multichannel oxygen-enriched combustion-supporting combustor for rotary kiln, includes the multichannel combustor body, the outside of multichannel combustor body is outer axial flow wind sleeve pipe, and outer axial flow wind sheathed tube lower part outside fixedly connected with curved external oxygen boosting channel sleeve pipe, be equipped with the arc water conservancy diversion piece between outer axial flow wind sleeve pipe and the external oxygen boosting channel sleeve pipe, be equipped with two supporting shoes between arc water conservancy diversion piece and the external oxygen boosting channel sleeve pipe, form curved external oxygen boosting air passageway between arc water conservancy diversion piece and the outer axial flow wind sleeve pipe, the thickness of arc water conservancy diversion piece reduces from end to afterbody gradually, external oxygen boosting air passageway, arc water conservancy diversion piece and external oxygen boosting channel sleeve pipe radian are the same and are 10 ~ 180, the multichannel combustor body with the oxygen boosting air passageway is concentric setting. By adopting the technical scheme, the outside oxygen-enriched air is conveyed into the combustor through an outside channel which is completely isolated from primary air (inner and outer rotational flow air and outer axial flow air), so that the combustion supporting of the directional oxygen-enriched air is realized, and a better combustion supporting effect is achieved.
Preferably, the outer axial flow air sleeve is welded with an arc-shaped external oxygen enrichment channel sleeve through two enclosing plates.
Preferably, the radians of the external oxygen-enriched air channel, the arc-shaped flow deflector and the external oxygen-enriched channel casing are 60-150 degrees, and the external oxygen-enriched air channel is not arranged right below the external axial flow air casing.
Preferably, the arc-shaped guide vane can move back and forth along the axial direction and is used for changing the spraying angle of the oxygen-enriched air.
Preferably, one end of the supporting block is welded with the arc-shaped flow deflector, and the other end of the supporting block is connected with the inner wall of the external oxygen enrichment channel sleeve.
Preferably, the diameter of the external oxygen-enriched air channel sleeve is the same or the external oxygen-enriched air channel sleeve gradually increases from the end part to the tail part and is tapered.
Preferably, the tail part of the external oxygen-enriched air sleeve is communicated with an oxygen-enriched air inlet pipe, and the oxygen-enriched air inlet pipe is provided with a regulating valve, an oxygen concentration detection sensor, an air flow sensor and a pressure sensor which are respectively used for regulating the oxygen-enriched air flow and monitoring the oxygen concentration, flow and pressure of the oxygen-enriched air.
Preferably, the tail part of the external oxygen-enriched air channel is provided with an adjustable telescopic device, a front flange and a rear flange of the adjustable telescopic device are respectively welded with the outer wall of the external oxygen-enriched air channel sleeve and the outer wall of the external axial flow air sleeve, a pair of helical gear transmission mechanisms or turbine worm transmission mechanisms comprising a horizontal screw rod and a vertical screw rod are arranged in a shell of the adjustable telescopic device, the horizontal screw rod is matched with a nut fixed at the tail part of the arc-shaped guide vane, and the vertical screw rod is connected with a manual or electric driving mechanism outside the adjustable telescopic device. Therefore, under the drive of a manual or electric driving mechanism, the horizontal screw rod is driven to rotate through the helical gear transmission mechanism or the worm and gear transmission mechanism, so that the arc-shaped flow deflector is driven to slightly move forwards and backwards along the axial direction, the head of the arc-shaped flow deflector slightly moves forwards and backwards along the axial direction, and finally the relative position of the head of the arc-shaped flow deflector and the external oxygen enrichment channel sleeve is changed, so that the angle of the oxygen enrichment air is changed.
Preferably, the internal part of the externally-hung oxygen-enriched air channel is divided into a plurality of arc-shaped air channels for conveying air with different oxygen concentrations, and by adopting the technical scheme, the shape and the temperature of the flame in different angle areas of the circumference can be conveniently adjusted.
Compared with the prior art, the utility model has the beneficial effects that:
firstly, oxygen-enriched air is conveyed into a burner through an outer channel completely isolated from primary air (inner and outer rotational flow air and outer axial flow air), after the oxygen-enriched air is ejected out of the burner, uniform oxygen-enriched air flow which is arc-shaped, flat, suitable for angles and suitable for ranges can be formed at the bottom of the lower abdomen of an outer axial flow air sleeve (namely the lower abdomen of flame), the uniform oxygen-enriched air flow is directionally and accurately ejected into a specified area, the directional oxygen-enriched air combustion supporting is realized, the better combustion supporting effect is achieved, and the better combustion effect and the fuel burnout rate are favorably improved,the combustion temperature of a designated area is increased, the calcination effect is improved, so that the coal consumption is reduced, the clinker quality is improved, meanwhile, the common firing process problems of crusting, ring formation, yellow core materials and the like are improved because the pulverized coal is fully combusted, and because oxygen-enriched air does not directly enter the central area of the flame to participate in combustion supporting, the reduction of NO in the combustion process is facilitatedxIn addition, because the oxygen-enriched air is used for supporting combustion, the air quantity of secondary and tertiary combustion-supporting air can be reduced on the premise that the pulverized coal is fully combusted, and the power consumption of a tail high-temperature fan can be obviously reduced.
The multi-channel rotary kiln combustor with the directional oxygen enrichment and combustion supporting functions can be suitable for new manufacture or modification of multi-channel combustors taking coal, fuel oil, fuel gas, solid waste, biomass and the like as fuels in various industrial fields, and the oxygen enrichment channel can convey oxygen-enriched air or ordinary air and can achieve positive effects of different degrees.
Drawings
FIG. 1 is a schematic illustration of an embodiment of the present invention;
FIG. 2 is a schematic view of a cross-sectional structure A-A according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line B-B in an embodiment of the present invention;
in the figure: 1. a central wind channel; 2. an inner swirling air passage; 3. an outer swirling air passage; 4. a coal air channel; 5. an outer axial flow air channel; 6. a support block; 7. an arc-shaped flow deflector; 8. an external oxygen-enriched air channel; 9. an outer axial flow air sleeve; 10. externally hanging an oxygen-enriched air channel sleeve; 11. a nut; 12. an adjustable telescopic device; 13. an oxygen-enriched air inlet pipe; 14. adjusting a valve; 15. an oxygen concentration sensor; 16. an air flow sensor; 17. a pressure sensor; 18. an external axial air adjustable expansion joint; 19. an adjustable expansion joint for external cyclone wind; 20. an adjustable expansion joint for internal cyclone wind; 21. a pulverized coal air inlet pipe; 22. a central air inlet pipe; 23. a primary air inlet pipe; 24. a horizontal screw rod; 25. and (5) a vertical screw rod.
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 to 3, the present invention provides a technical solution:
a multi-channel oxygen-enriched combustion-supporting burner for a rotary kiln comprises a multi-channel burner body, wherein the outermost part of the multi-channel burner body is an outer axial flow air sleeve 9, the outer side of the lower part of the outer axial flow air sleeve 9 is fixedly connected with an arc-shaped external oxygen-enriched channel sleeve 10, an arc-shaped flow deflector 7 is arranged between the outer axial flow air sleeve 9 and the external oxygen-enriched channel sleeve 10, two supporting blocks 6 are arranged between the arc-shaped flow deflector 7 and the external oxygen-enriched channel sleeve 10, an arc-shaped external oxygen-enriched air channel 8 is formed between the arc-shaped flow deflector 7 and the outer axial flow air sleeve 9, the thickness of the arc-shaped flow deflector 7 is gradually reduced from the end to the tail, the radians of the external oxygen-enriched air channel 8, the arc-shaped flow deflector 7 and the external oxygen-enriched channel sleeve 10 are the same and are 10-180 degrees, and the thickness of the arc-shaped flow deflector 7 is gradually reduced from the end to the tail, all original sleeves in the multi-channel combustor body and the oxygen-enriched air channel 8 are arranged concentrically and are arranged at the end head of the tail part in an axially staggered mode.
Wherein, the outer axial flow air sleeve 9 is welded with an arc-shaped external oxygen-enriched channel sleeve 10 through two coamings.
The radian of the external oxygen-enriched air channel 8, the arc-shaped flow deflectors 7 and the external oxygen-enriched channel sleeve 10 is 60-150 degrees, and the external oxygen-enriched air channel 8 is not arranged right below the external axial air sleeve.
The arc-shaped guide vane 7 can move back and forth along the axial direction and is used for changing the spraying angle of the oxygen-enriched air.
One end of the supporting block 6 is welded with the arc-shaped flow deflector 7, and the other end is connected with the inner wall of the external oxygen enrichment channel sleeve 10.
Wherein, the diameter of the external oxygen-enriched air channel sleeve 10 is the same or gradually increases from the end part to the tail part to form a taper.
The tail of the external oxygen-enriched air sleeve 10 is communicated with an oxygen-enriched air inlet pipe 13, and the oxygen-enriched air inlet pipe 13 is provided with an adjusting valve 14, an oxygen concentration detection sensor 15, an air flow sensor 16 and a pressure sensor 17 which are respectively used for adjusting the oxygen-enriched air flow and monitoring the oxygen concentration, flow and pressure of the oxygen-enriched air.
Wherein, the tail part of the external oxygen-enriched air channel 8 is provided with an adjustable telescopic device 12, the front flange and the rear flange of the adjustable telescopic device 12 are respectively welded with the outer wall of an external oxygen-enriched air channel sleeve 10 and the outer wall of an external axial flow air sleeve 9 of the multi-channel burner body, a pair of helical gear transmission mechanisms or turbine worm transmission mechanisms comprising a horizontal screw rod 24 and a vertical screw rod 25 are arranged in a casing of the adjustable telescopic device 12, the horizontal screw rod 24 is matched with a nut 11 fixed at the tail part of the arc-shaped deflector, the vertical screw rod 25 is connected with a manual or electric driving mechanism outside the adjustable telescopic device 12, therefore, under the driving of the manual or electric driving mechanism, the horizontal screw rod 24 is driven to rotate by the helical gear transmission mechanism or the turbine worm transmission mechanism, so as to drive the arc-shaped deflector 7 to slightly move forwards and backwards along the axial direction, and further to slightly move the head part of the arc-shaped deflector 7 along the axial direction, finally, the relative position of the head of the arc-shaped guide vane 7 and the external oxygen enrichment channel sleeve 10 is changed to change the spraying angle of the oxygen enrichment air.
The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln further comprises an outer axial flow air adjustable expansion joint 18, an outer rotational flow air adjustable expansion joint 19, an inner rotational flow air adjustable expansion joint 20, a pulverized coal air inlet pipe 21, a central air inlet pipe 22 and a primary air inlet pipe 23.
Claims (10)
1. The multi-channel oxygen-enriched combustion-supporting combustor for the rotary kiln is characterized by comprising a multi-channel combustor body, wherein the outermost part of the multi-channel combustor body is an outer axial flow air sleeve (9), the outer side of the lower part of the outer axial flow air sleeve (9) is fixedly connected with an arc-shaped externally-hung oxygen-enriched channel sleeve (10), an arc-shaped flow deflector (7) is arranged between the outer axial flow air sleeve (9) and the externally-hung oxygen-enriched channel sleeve (10), two supporting blocks (6) are arranged between the arc-shaped flow deflector (7) and the externally-hung oxygen-enriched channel sleeve (10), an arc-shaped externally-hung oxygen-enriched air channel (8) is formed between the arc-shaped flow deflector (7) and the externally-hung oxygen-enriched channel sleeve (9), the thickness of the arc-shaped flow deflector (7) is gradually reduced from the end to the tail part, the radians of the externally-hung air channel (8), the arc-shaped flow deflector (7) and the externally-hung oxygen-enriched channel sleeve (10) are the same and are all 10-180 degrees, the multi-channel burner body and the external oxygen-enriched air channel (8) are concentrically arranged.
2. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the outer axial flow air sleeve (9) is welded with an arc-shaped external oxygen-enriched channel sleeve (10) through two surrounding plates.
3. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the radian of the external oxygen-enriched air channel (8), the arc-shaped flow deflector (7) and the external oxygen-enriched channel sleeve (10) is 60-150 degrees, and the external oxygen-enriched air channel (8) is not arranged right below the external axial flow air sleeve.
4. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the arc-shaped guide vane (7) can move back and forth along the axial direction.
5. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: one end of the supporting block (6) is welded with the arc-shaped flow deflector (7), and the other end is connected with the inner wall of the external oxygen-enriched channel sleeve (10).
6. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the diameter of the external oxygen-enriched air channel sleeve (10) is the same or the external oxygen-enriched air channel sleeve gradually increases from the end part to the tail part and is tapered.
7. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the tail part of the external oxygen-enriched channel sleeve (10) is communicated with an oxygen-enriched air inlet pipe (13).
8. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 7, wherein: an adjusting valve (14), an oxygen concentration detection sensor (15), an air flow sensor (16) and a pressure sensor (17) are arranged on the oxygen-enriched air inlet pipe (13).
9. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the tail of the external oxygen-enriched air channel (8) is provided with an adjustable telescopic device (12), a front flange and a rear flange of the adjustable telescopic device (12) are respectively welded with the outer wall of the external oxygen-enriched air channel sleeve (10) and the outer wall of the external axial flow air sleeve (9), a pair of helical gear transmission mechanisms or turbine worm transmission mechanisms comprising a horizontal screw rod (24) and a vertical screw rod (25) are arranged in a shell of the adjustable telescopic device (12), the horizontal screw rod (24) is matched with a nut (11) fixed at the tail of the arc-shaped deflector (7), and the vertical screw rod (25) is connected with a manual or electric driving mechanism outside the adjustable telescopic device (12).
10. The multi-channel oxygen-enriched combustion-supporting burner for the rotary kiln as claimed in claim 1, wherein: the interior of the external oxygen-enriched air channel (8) is divided into a plurality of arc-shaped air channels for conveying air with different oxygen concentrations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121942090.8U CN216079778U (en) | 2021-08-19 | 2021-08-19 | Multi-channel oxygen-enriched combustion-supporting burner for rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121942090.8U CN216079778U (en) | 2021-08-19 | 2021-08-19 | Multi-channel oxygen-enriched combustion-supporting burner for rotary kiln |
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| Publication Number | Publication Date |
|---|---|
| CN216079778U true CN216079778U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121942090.8U Active CN216079778U (en) | 2021-08-19 | 2021-08-19 | Multi-channel oxygen-enriched combustion-supporting burner for rotary kiln |
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| CN (1) | CN216079778U (en) |
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2021
- 2021-08-19 CN CN202121942090.8U patent/CN216079778U/en active Active
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