阅读说明：本技术 一种具有定向富氧助燃的多通道回转窑燃烧器 (Multichannel rotary kiln combustor with directional oxygen enrichment combustion supporting function ) 是由 沈忠东 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种具有定向富氧助燃的多通道回转窑燃烧器,包括多通道燃烧器本体,所述多通道燃烧器本体的外轴流风套管外侧通过两块围板焊接有外挂富氧通道套管,所述外挂富氧通道套管靠近外轴流风套管一侧设有弧形导流组件,所述弧形导流组件与外轴流风套管之间形成外挂富氧空气通道,外挂富氧空气通道弧度为10～180°,设置在所述多通道燃烧器本体的外轴流风套管的下部,所述多通道燃烧器本体与所述富氧空气通道为同心设置。本发明可以在燃烧器形成的火焰下腹部底部形成弧形、扁平、适合角度和适合范围的均匀富氧气流,定向、精准地喷射入指定的区域,实现定向富氧空气助燃,达到更好的助燃效果。(The invention discloses a multi-channel rotary kiln burner with directional oxygen enrichment combustion supporting function, which comprises a multi-channel burner body, wherein an externally-hung oxygen enrichment channel sleeve is welded on the outer side of an outer axial flow air sleeve of the multi-channel burner body through two surrounding plates, an arc-shaped flow guide assembly is arranged on one side, close to the outer axial flow air sleeve, of the externally-hung oxygen enrichment channel sleeve, an externally-hung oxygen enrichment air channel is formed between the arc-shaped flow guide assembly and the outer axial flow air sleeve, the radian of the externally-hung oxygen enrichment air channel is 10-180 degrees, the externally-hung oxygen enrichment air channel is arranged on the lower portion of the outer axial flow air sleeve of the multi-channel burner body, and the multi-channel burner body and the oxygen enrichment air channel are arranged concentrically. The invention 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.)

1. The utility model provides a multichannel rotary kiln combustor with it is combustion-supporting to orient oxygen boosting, its characterized in that, includes the multichannel combustor body, external oxygen boosting passageway sleeve pipe (10) have through two bounding walls welding in the outer axial flow wind sleeve pipe (9) outside of multichannel combustor body, outer axial flow wind sleeve pipe (9) are close to external oxygen boosting passageway sleeve pipe (10) one side and are equipped with arc water conservancy diversion subassembly (7), form external oxygen boosting air passageway (8) between arc water conservancy diversion subassembly (7) and oxygen boosting passageway sleeve pipe (10), the radian of external oxygen boosting air passageway (8) is 10 ~ 180, sets up the lower part of external axial flow wind sleeve pipe (9), the multichannel combustor body with external oxygen boosting air passageway (8) are for setting up with one heart.

2. The multi-channel rotary kiln burner with directional oxygen-enriched combustion supporting function as claimed in claim 1, wherein: the radian of the externally-hung oxygen-enriched air channel (8) is 10-170 degrees, and the externally-hung oxygen-enriched air channel is not arranged right below the outer axial flow air casing pipe (9).

3. The multi-channel rotary kiln burner with directional oxygen-enriched combustion supporting function as claimed in claim 1, wherein: the arc-shaped flow guide assembly (7) can move back and forth along the axial direction.

4. The multi-channel rotary kiln burner with directional oxygen-enriched combustion supporting function as claimed in claim 3, wherein: the arc-shaped flow guide assembly (7) is an arc-shaped flow guide sheet, the thickness of the flow guide sheet is gradually reduced from the end to the tail, and the flow guide sheet is used for changing the spraying angle of the oxygen-enriched air.

5. The multi-channel rotary kiln burner with directional oxygen-enriched combustion supporting function as claimed in claim 3, wherein: the arc-shaped flow guide assembly (7) is connected with the external oxygen-enriched channel sleeve (10) through two supporting blocks (6), one end of each supporting block (6) is welded with the arc-shaped flow guide assembly (7), and the other end of each supporting block is connected with the inner wall of the external oxygen-enriched channel sleeve (10).

6. The multi-channel rotary kiln burner with directional oxygen-enriched combustion supporting function 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 rotary kiln burner with directional oxygen-enriched combustion supporting function as claimed in claim 1, wherein: the tail part of the oxygen-enriched air sleeve (10) is communicated with an oxygen-enriched air inlet pipe (13).

8. The multi-channel rotary kiln burner with directional oxygen-enriched combustion supporting function 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 rotary kiln burner with directional oxygen-enriched combustion supporting function 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 flow guide assembly (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 rotary kiln burner with directional oxygen-enriched combustion supporting function 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.

Technical Field

The invention relates to the technical field of combustion equipment, in particular to a multi-channel rotary kiln combustor with directional oxygen enrichment combustion supporting.

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 NO_xThe amount of the produced (C) is remarkably increased.

Disclosure of Invention

The invention aims to provide a multi-channel rotary kiln combustor with directional oxygen enrichment combustion supporting function, and aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a multichannel rotary kiln combustor with it is combustion-supporting to orient oxygen boosting, includes the multichannel combustor body, the outer axial flow wind sleeve pipe outside of multichannel combustor body has external oxygen boosting passageway sleeve pipe through two bounding walls welding, external oxygen boosting passageway sleeve pipe is close to outer axial flow wind sleeve pipe one side and is equipped with arc guiding subassembly, form external oxygen boosting air duct between arc guiding subassembly and the outer axial flow wind sleeve pipe, external oxygen boosting air duct radian is 10 ~ 180, sets up the outer axial flow wind sleeve pipe's of multichannel combustor body lower part, the multichannel combustor body with the oxygen boosting air duct is for setting up with one heart. 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 radian of the externally-hung oxygen-enriched air channel is 10-170 degrees, and the externally-hung oxygen-enriched air channel is not arranged right below an external axial flow air sleeve of the multi-channel combustor body.

Preferably, the arc-shaped flow guide assembly can move back and forth along the axial direction.

Preferably, one side of the external oxygen-enriched air channel, which is close to the external axial flow air casing, is provided with an arc-shaped flow guide assembly capable of moving back and forth along the axial direction, and the arc-shaped flow guide assembly is used for changing the injection angle of the oxygen-enriched air.

Preferably, the arc-shaped flow guide assembly is an arc-shaped flow guide sheet, the thickness of the arc-shaped flow guide sheet is gradually reduced from the end to the tail, and the arc-shaped flow guide assembly is used for changing the spraying angle of the oxygen-enriched air.

Preferably, the arc-shaped flow guide assembly is connected with the external oxygen-enriched channel sleeve through two supporting blocks, one end of each supporting block is welded with the arc-shaped flow guide assembly, and the other end of each supporting block is connected with the inner wall of the external oxygen-enriched 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 flow guide assembly, 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 guide assembly is driven to slightly move forwards and backwards along the axial direction, the head of the arc-shaped flow guide assembly is further slightly moved forwards and backwards along the axial direction, and finally the relative position of the head of the arc-shaped flow guide assembly and the externally-hung oxygen-enriched channel sleeve is changed, so that the angle of the oxygen-enriched air sprayed out 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 invention has the beneficial effects that:

firstly, oxygen-enriched air is conveyed into a combustor through an outer channel which is completely isolated from primary air (inner and outer rotational flow air and outer axial flow air) and is sprayed out of the combustor, can form arc-shaped, flat, uniform oxygen-enriched airflow with a proper angle and a proper range at the bottom of the lower abdomen (namely the flame lower abdomen) of the outer axial flow air sleeve, and directionally and accurately jet the uniform oxygen-enriched airflow into a specified area, thereby realizing the combustion supporting of the directional oxygen-enriched air and achieving better combustion supporting effect, thereby being beneficial to better improving the combustion effect and the fuel burnout rate, increasing the combustion temperature of a designated area, improving the calcination effect, thereby reducing coal consumption, improving clinker quality, improving the common firing process problems of skinning, ring formation, yellow core materials and the like because the coal powder is fully combusted, because the 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 facilitated._xIn addition, because of the oxygen-enriched air for supporting combustion, the air of secondary and tertiary combustion-supporting air can be reduced on the premise of full combustion of coal powderThe power consumption of the 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 guide assembly; 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:

the utility model provides a multichannel rotary kiln combustor with it is combustion-supporting to orient oxygen boosting, includes the multichannel combustor body, the welding of the outer axial flow wind sleeve pipe 9 outside of multichannel combustor body has external oxygen boosting passageway sleeve pipe 10 through two bounding walls, external oxygen boosting passageway sleeve pipe 10 is close to outer axial flow wind sleeve pipe 9 one side and is equipped with arc guiding subassembly 7, form oxygen boosting air passageway 8 between arc guiding subassembly 7 and the outer axial flow wind sleeve pipe 9, the arc width scope of external oxygen boosting air passageway 8 is 10 ~ 180, sets up outer axial flow wind sleeve pipe 9's lower part, and original each sleeve pipe and oxygen boosting air passageway 8 are the concentric setting in the multichannel combustor body, and stagger the range in afterbody end axial.

Wherein, the arc width range of the external oxygen-enriched air channel 8 is 10-170 degrees and is not arranged right below the external axial flow air sleeve 9.

Wherein, the arc-shaped flow guide assembly 7 can move back and forth along the axial direction.

The external oxygen-enriched air channel 8 is provided with an arc-shaped flow guide assembly 7 which can move back and forth along the axial direction on one side close to the external axial flow air casing 9, the arc-shaped flow guide assembly 7 is an arc-shaped flow guide sheet, the thickness of the arc-shaped flow guide assembly is gradually reduced from the end to the tail, and the arc-shaped flow guide assembly is used for changing the injection angle of the oxygen-enriched air.

The arc-shaped flow guide assembly 7 is connected with the external oxygen-enriched channel sleeve 10 through two supporting blocks 6, one end of each supporting block 6 is welded with the arc-shaped flow guide assembly 7, and the other end of each supporting block is connected with the inner wall of the external oxygen-enriched 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 flow guide component, 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 flow guide component 7 to slightly move forwards and backwards along the axial direction, and further to slightly move the head part of the arc-shaped flow guide component 7 along the axial direction, finally, the relative position of the head of the arc-shaped flow guide assembly 7 and the external oxygen enrichment channel sleeve 10 is changed to change the spraying angle of the oxygen enrichment air.

The multi-channel rotary kiln combustor with the directional oxygen enrichment combustion supporting function comprises a multi-channel combustor body, wherein the multi-channel combustor body is internally provided with 5 annular channels, a central air channel 1, an inner cyclone air channel 2, an outer cyclone air channel 3, a coal air channel 4 and an outer axial flow air channel 5 are sequentially arranged from inside to outside, and the multi-channel rotary kiln combustor with the directional oxygen enrichment combustion supporting function further comprises an outer axial flow air adjustable expansion joint 18, an outer cyclone air adjustable expansion joint 19, an inner cyclone air adjustable expansion joint 20, a coal powder air inlet pipe 21, a central air inlet pipe 22 and a primary air inlet pipe 23.