CN116989331A - Low-nitrogen combustor with internal smoke circulation - Google Patents
Low-nitrogen combustor with internal smoke circulation Download PDFInfo
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- CN116989331A CN116989331A CN202310849564.1A CN202310849564A CN116989331A CN 116989331 A CN116989331 A CN 116989331A CN 202310849564 A CN202310849564 A CN 202310849564A CN 116989331 A CN116989331 A CN 116989331A
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- Prior art keywords
- air
- air pipe
- port
- smoke
- thick bamboo
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000779 smoke Substances 0.000 title claims abstract description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 21
- 230000002093 peripheral effect Effects 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 238000010992 reflux Methods 0.000 claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 28
- 239000003546 flue gas Substances 0.000 claims description 28
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 20
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 20
- 241001330002 Bambuseae Species 0.000 claims description 20
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 20
- 239000011425 bamboo Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 10
- 229920001875 Ebonite Polymers 0.000 claims description 9
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 15
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 239000000446 fuel Substances 0.000 abstract description 5
- 239000002737 fuel gas Substances 0.000 description 18
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000007921 spray Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
-
- 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
-
- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a smoke internal circulation low-nitrogen burner which comprises an internal connection barrel, an air injection barrel and a main gas pipeline, wherein one end of the internal connection barrel is in threaded connection with a peripheral air pipe arranged between the internal connection barrel and the air injection barrel; according to the invention, the smoke inlet adjusting component and the fine adjusting component are used for adjusting the size of the injection port formed between the air pipe shrinkage port and the air injection cylinder, so that the reflux amount of smoke in unit time can be conveniently and accurately adjusted, the smoke reflux amount can be controlled to participate in mixed combustion in an optimal proportion, and the problem that the air-fuel ratio is reduced due to excessive or insufficient smoke reflux amount is avoided.
Description
Technical Field
The invention relates to the technical field of low-nitrogen combustors, in particular to a smoke internal circulation low-nitrogen combustor.
Background
In the operation process of the heating furnace, a great amount of flue gas emission is generated, wherein NOx, CO and the like bring about atmospheric pollution, bad influence is generated on environment and personal health, social sustainable development is influenced, emission limitation on pollutants in the flue gas is increasingly strict at home and abroad, strict limitation on national policies is met, and harm caused by atmospheric pollution is met, a more energy-saving and environment-friendly combustor is required to be designed, the contradiction between development and environmental protection is solved, and the combustor has the characteristics of high combustion efficiency, small emission pollution and the like, and particularly, attention is paid to reducing emission of nitrogen oxides to realize low-nitrogen clean combustion.
As in chinese patent publication No. CN115143463a, a classified flue gas internal circulation low-nitrogen burner is disclosed, comprising a peripheral air pipe and a main gas pipe; the peripheral air pipe is sleeved on the outer side of the main gas pipeline and is coaxially arranged with the main gas pipeline; the peripheral air pipe comprises an air pipe contraction opening arranged at the end part; an air injection section is sleeved at the downstream of the peripheral air pipe. According to the invention, through the arrangement of the peripheral branch pipe gas side spray holes, the inclined gas branch pipe body and the swirl vanes, the mixing of air and gas is enhanced, so that the mixing is more uniform, the combustion efficiency is improved, the thermal efficiency of a boiler is increased, and the safety of the burner in the use process is improved.
However, the device cannot adjust the smoke quantity of the internal reflux circulation in unit time during working, so that the smoke reflux quantity is inconvenient to control to participate in mixed combustion in an optimal proportion, the problem of air-fuel ratio reduction caused by excessive or insufficient smoke reflux quantity is solved, and certain use limitations exist.
Therefore, it is necessary to provide a low nitrogen burner with internal circulation of flue gas to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a low-nitrogen combustor capable of internally circulating smoke, which solves the problems that in the prior art, the amount of the internally circulating smoke in unit time cannot be adjusted, so that the smoke reflux amount cannot be conveniently controlled to participate in mixed combustion in an optimal proportion, and the air-fuel ratio is easily reduced due to excessive or insufficient smoke reflux amount.
In order to achieve the above object, the present invention solves the above technical problems as follows: the utility model provides a low nitrogen combustor of flue gas inner loop, includes inscription section of thick bamboo, air injection section of thick bamboo and coaxial arrangement in the inside air reposition of redundant personnel section of thick bamboo of air injection section of thick bamboo, inscription section of thick bamboo's one end threaded connection has the peripheral air pipe that sets up between inscription section of thick bamboo and air injection section of thick bamboo, the one end that peripheral air pipe is close to the air injection section of thick bamboo is fixed with the air pipe shrink mouth with air injection section of thick bamboo port complex, inscription section of thick bamboo's outside is provided with the income cigarette adjusting part that adjusts flue gas reflux.
As a further scheme of the invention, the smoke inlet adjusting component comprises a rotating seat fixed with the outer side wall of the inner connecting cylinder, a threaded sleeve is rotatably connected in the rotating seat through a bearing, the inner side surface of the threaded sleeve is in threaded connection with the outer side surface of the port of the peripheral air pipe, and threads on the inner side and the outer side of one end of the peripheral air pipe, which is close to the rotating seat, are identical.
As a further scheme of the invention, the outer side surface of the thread sleeve is fixedly provided with a plurality of meshing teeth which are distributed in an equidistant annular manner, and the meshing teeth are connected with a transmission gear in a meshing manner.
As a further scheme of the invention, the threads on the inner and outer surfaces of one end of the peripheral air pipe, which is close to the rotating seat, are respectively adhered and covered with a thin sealing rubber pad.
As a further scheme of the invention, one end of the air pipe shrinkage port far away from the peripheral air pipe is in transmission connection with a fine adjustment assembly arranged between the air injection cylinder and the air diversion cylinder, the fine adjustment assembly comprises a connecting sleeve which is in rotary connection with one end of the air pipe shrinkage port far away from the peripheral air pipe, one end of the connecting sleeve far away from the air pipe shrinkage port is fixedly provided with a movable plate, a sealing plate positioned on one side of the movable plate is fixedly arranged between the air injection cylinder and the air diversion cylinder, a first circulation port and a second circulation port which are arranged in a staggered manner are respectively arranged on the side surfaces of the sealing plate and the movable plate, and a conical column which is properly matched with the first circulation port in an inserting manner is fixedly arranged on the side surface of the movable plate close to the sealing plate.
As a further scheme of the invention, a hard rubber sleeve is arranged between the inner side surface of the connecting sleeve and the outer side surface of the air diversion cylinder, and the hard rubber sleeve is adhered and fixed with the inner side surface of the connecting sleeve.
As a further scheme of the invention, the whole tapered column is arranged at a taper angle of 45-60 degrees.
As a further scheme of the invention, a plurality of first flow ports and second flow ports are arranged, and the first flow ports and the second flow ports are distributed in an equidistant annular mode.
As a further aspect of the present invention, the tapered column is provided in plural and corresponding to the first flow port.
Compared with the prior art, the invention has the beneficial effects that: the peripheral air pipe is adjusted to move through the smoke inlet adjusting component, so that the position of the air pipe shrinkage opening is adjusted through the smoke inlet adjusting component, the size of an injection opening formed between the air pipe shrinkage opening and the air injection cylinder is adjusted, the reflux amount of smoke in unit time can be conveniently adjusted, the smoke reflux amount can be controlled to participate in mixed combustion in an optimal proportion, and the problem that the air-fuel ratio is reduced due to excessive or insufficient smoke reflux amount is avoided; when the air pipe shrinkage port moves, the air pipe shrinkage port drives the movable plate to move towards the direction close to the sealing plate through the connecting sleeve, the conical column is always inserted into the first flow port to guide and limit the movement of the movable plate, and the movable plate drives the conical column to be inserted into the first flow port to different degrees, so that the flow area of the first flow port can be adjusted, higher-precision adjustment of the flow quantity of the smoke in unit time is realized, and the precision of smoke backflow adjustment is effectively improved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a schematic overall sectional view of the present invention;
FIG. 3 is an enlarged view of the structure of FIG. 2 at A;
FIG. 4 is a schematic view of the overall exploded structure of the present invention;
FIG. 5 is an exploded view of the smoke regulating assembly of the present invention;
FIG. 6 is a schematic view of a portion of a trimming assembly according to the present invention;
FIG. 7 is a schematic cross-sectional view of the peripheral air tube and air splitter box of the present invention;
FIG. 8 is a schematic view of a partial structure of a tapered column according to the present invention;
FIG. 9 is a schematic view of a partial structure of a closure plate and a first flow opening of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a smoke inlet adjusting component; 101. a thread sleeve; 102. meshing teeth; 103. a rotating seat; 104. a bearing; 2. a fine tuning assembly; 201. a moving plate; 202. a tapered column; 203. a closing plate; 204. a first flow port; 205. connecting sleeves; 206. a second flow port; 3. a peripheral air tube; 4. an inner connecting cylinder; 5. an air injection cylinder; 6. a main gas pipeline; 7. an air expansion port; 8. a peripheral gas branch pipe; 9. a servo motor; 10. a transmission gear; 11. a flame stabilizing disc; 12. an injection hole; 13. an air pipe shrinkage port; 14. an air diversion cylinder; 15. flame injection holes; 16. a hard rubber sleeve; 17. an igniter.
Detailed Description
The invention is further described below with reference to examples.
Referring to fig. 1-9, the invention provides a smoke internal circulation low-nitrogen combustor, which comprises an internal cylinder 4, an air injection cylinder 5 and a main gas pipeline 6, wherein one end of the internal cylinder 4 is in threaded connection with a peripheral air pipe 3 arranged between the internal cylinder 4 and the air injection cylinder 5, one end of the peripheral air pipe 3, which is close to the air injection cylinder 5, is fixedly provided with an air pipe shrinkage opening 13 matched with a port of the air injection cylinder 5, a smoke inlet adjusting component 1 for adjusting smoke reflux amount is arranged outside the internal cylinder 4, the internal cylinder 4 is sleeved outside the main gas pipeline 6 and is coaxially arranged with the internal cylinder 4, an air diversion cylinder 14 is coaxially arranged in the air injection cylinder 5, one end, which is far away from the internal cylinder 4, of the air diversion cylinder 14 is fixedly provided with a flame stabilizing disc 11, the outer side surface of the flame stabilizing disc 11 is fixedly provided with an igniter 17, the side surface of the flame stabilizing disc 11 is provided with a plurality of flame injection holes 15, one end, which is far from the internal cylinder 4, of the air injection cylinder 5 is fixedly provided with an air expansion opening 7, the main gas pipeline 6 is internally communicated with a plurality of peripheral gas branch pipes 8 which are distributed in a ring shape, one end, which is far from the main gas pipeline 6, is far from the air injection pipe 6, one end, is far from the side wall of the main gas pipe 6 is connected with the air injection hole 12, which is far from the air injection port is connected with one end of the air injection port 3, which is far from the air pipe 13, which is far from one end of the side of the air pipe 13, which is far from the flame injection port is connected with the side, which is far from the flame pipe; when the internal combustion tube 4 and the air diversion tube 14 are used for a passage through which air flows, the air is guided to a boiler furnace, the fuel gas is conveyed through the main fuel gas pipeline 6, part of the fuel gas in the main fuel gas pipeline 6 is conveyed into the air expansion port 7 through the plurality of peripheral fuel gas branch pipes 8 and is sprayed out from the ports of the peripheral fuel gas branch pipes 8 to be ignited, the other part of the fuel gas is sprayed out into the air diversion tube 14 through the plurality of spray holes 12 and is sprayed out through the plurality of flame spray holes 15, the flame spray holes 15 and the fuel gas at the ports of the peripheral fuel gas branch pipes 8 are sprayed out through the igniter 17, so that the flame is uniformly dispersed, the temperature of the flame is effectively reduced, the generation of nitrogen oxide is reduced, the peripheral air flows through the air expansion port 7 to form a entrainment effect, the downstream flue gas is mixed and combusted in the combustor again through the injection port formed between the air pipe shrinkage port 13 and the air injection tube 5, the flue gas is circulated back to participate in the combustion, the air flow is increased due to the shrinkage effect of the air pipe shrinkage port 13, the negative pressure effect is formed, the back flow effect is more obvious, the flue gas is further reduced due to the cooling and the inhibiting effect, the formation of nitrogen oxide is further reduced, the formation of the flue gas is further reduced, the flue gas is conveniently flows through the air pipe shrinkage assembly 1 and the air flow ratio is conveniently adjusted through the air pipe shrinkage assembly 1, the injection hole 1, the air flow is conveniently and the air flow ratio is conveniently adjusted through the air pipe 1, the air pipe has the high ratio, and the flue gas is conveniently and the flue gas, and the flue gas is more has the flue, and the flue gas.
As further shown in fig. 1, 3, 5 and 6, it is worth specifically explaining that the smoke inlet adjusting assembly 1 comprises a rotating seat 103 fixed with the outer side wall of the inner cylinder 4, a threaded sleeve 101 is rotatably connected in the rotating seat 103 through a bearing 104, the inner side surface of the threaded sleeve 101 is in threaded connection with the outer side surface of the port of the peripheral air pipe 3, and the threads on the inner surface and the outer surface of one end of the peripheral air pipe 3, which is close to the rotating seat 103, are the same; when the reflux amount of the smoke in unit time is regulated, the threaded sleeve 101 rotates in the rotating seat 103, the threaded sleeve 101 drives the peripheral air pipe 3 to rotate through threads when rotating, so that the distance between the air pipe shrinkage opening 13 and the air injection cylinder 5 port is regulated through the rotation of the peripheral air pipe 3, the reflux amount of the smoke in unit time is regulated, and the smoke reflux amount can be controlled to participate in mixed combustion in an optimal proportion.
As further shown in fig. 1, 3 and 6, it is worth specifically explaining that the outer side surface of the threaded sleeve 101 is fixed with a plurality of meshing teeth 102, the meshing teeth 102 are distributed in an equidistant annular shape, the outer side wall of the inner connecting barrel 4 is fixed with a servo motor 9, the output end of the servo motor 9 is fixed with a transmission gear 10 in meshed connection with the meshing teeth 102, and the threads on the inner and outer surfaces of one end of the peripheral air pipe 3, which is close to the rotating seat 103, are respectively covered with a thin sealing rubber pad; the output end of the servo motor 9 drives the transmission gear 10 to rotate, the transmission gear 10 and the meshing teeth 102 cooperate to drive the threaded sleeve 101 to rotate, so that the distance between the air pipe shrinkage opening 13 and the port of the air injection cylinder 5 is adjusted, the high-precision adjustment of the air pipe shrinkage opening 13 is realized, and the arranged thin sealing rubber pad ensures that the peripheral air pipe 3 and the inner cylinder 4 always have good sealing performance when the peripheral air pipe 3 rotates.
As further shown in fig. 4, 5, 6, 7 and 8, it should be specifically explained that the fine adjustment assembly 2 includes a connecting sleeve 205 rotatably connected to one end of the air tube shrinkage port 13 away from the peripheral air tube 3, one end of the connecting sleeve 205 away from the air tube shrinkage port 13 is fixed with a moving plate 201, a sealing plate 203 located at one side of the moving plate 201 is fixed between the air injection cylinder 5 and the air diversion cylinder 14, a first circulation port 204 and a second circulation port 206 which are arranged in a staggered manner are respectively formed on the sides of the sealing plate 203 and the moving plate 201, and a tapered column 202 which is suitably matched with the first circulation port 204 in a plugging manner is fixed on the side of the moving plate 201 close to the sealing plate 203; when the air pipe shrinkage port 13 moves, the air pipe shrinkage port 13 drives the moving plate 201 to move towards the direction close to the sealing plate 203 through the connecting sleeve 205, the tapered column 202 is always inserted into the first flow port 204 to guide and limit the movement of the moving plate 201, and the moving plate 201 drives the tapered column 202 to be inserted into the first flow port 204 to different degrees, so that the flow area of the first flow port 204 can be adjusted, higher-precision adjustment of the flow quantity of the flue gas in unit time can be realized, and the precision of flue gas backflow adjustment can be effectively improved.
Further, as shown in fig. 7, it is worth specifically explaining that a hard rubber sleeve 16 is arranged between the inner side surface of the connecting sleeve 205 and the outer side surface of the air diversion cylinder 14, the hard rubber sleeve 16 is attached and fixed with the inner side surface of the connecting sleeve 205, and the whole tapered column 202 is arranged at a taper angle of 45-60 degrees; in particular operation, the hard rubber sleeve 16 is provided to ensure that a good seal is always provided between the connecting sleeve 205 and the air splitter cylinder 14 when the connecting sleeve 205 slides on the outer side of the air splitter cylinder 14.
As further shown in fig. 6, 8 and 9, it should be specifically noted that the first flow openings 204 and the second flow openings 206 are provided in plural, and the plural first flow openings 204 and the plural second flow openings 206 are distributed in an equidistant annular shape; in particular operation, the plurality of first and second flow ports 204, 206 facilitate the flow of the flue gas between the inner barrel 4 and the air splitter barrel 14 for internal circulation to participate in combustion.
As further shown in fig. 6, it is worth specifically describing that the tapered column 202 is provided with a plurality of tapered columns and is disposed corresponding to the first flow ports 204; in specific operation, the plurality of first flow ports 204 are synchronously inserted through the tapered columns 202, so that the adjustment precision of the reflux quantity in the unit time of the flue gas is further improved.
The scheme comprises the following working processes: the inner cylinder 4 and the air dividing cylinder 14 are used for the passage through which air flows to guide the air to the boiler furnace, the fuel gas is conveyed through the main fuel gas pipeline 6, part of the fuel gas in the main fuel gas pipeline 6 is conveyed into the air expansion port 7 through a plurality of peripheral fuel gas branch pipes 8 and is sprayed and ignited from the ports of the peripheral fuel gas branch pipes 8, the other part of the fuel gas is sprayed into the air dividing cylinder 14 through a plurality of spray holes 12 and is sprayed through a plurality of flame spray holes 15, the fuel gas in the flame spray holes 15 and at the ports of the peripheral fuel gas branch pipes 8 is ignited through a plurality of flame spray holes 15, so that the flame is uniformly dispersed, the temperature of the flame is effectively reduced, the generation of nitrogen and oxygen compounds is reduced, the peripheral air forms entrainment effect after flowing through the air expansion port 7, so that the downstream flue gas enters the burner again from the injection port formed between the air pipe shrinkage port 13 and the air injection cylinder 5 to participate in mixing and burning, the smoke is subject to internal circulation backflow to participate in combustion, the air flow velocity is increased to form negative pressure injection effect due to the shrinkage effect of the air pipe shrinkage opening 13, the backflow effect of the smoke is more obvious, the formation of nitrogen oxides is further reduced due to the cooling and inhibiting effects of the smoke, when the backflow amount of the smoke in unit time is regulated, the output end of the servo motor 9 drives the transmission gear 10 to rotate, the transmission gear 10 and the meshing teeth 102 cooperate to drive the thread bush 101 to rotate in the rotating seat 103, the thread bush 101 drives the peripheral air pipe 3 to rotate through threads when rotating, thereby regulating the distance between the air pipe shrinkage opening 13 and the air injection cylinder 5 through the rotation of the peripheral air pipe 3, regulating the backflow amount of the smoke in unit time, when the air pipe shrinkage opening 13 moves, the air pipe shrinkage port 13 drives the movable plate 201 to move towards the direction close to the sealing plate 203 through the connecting sleeve 205, the tapered column 202 is always inserted into the first flow port 204 to guide and limit the movement of the movable plate 201, and the movable plate 201 drives the tapered column 202 to be inserted into the first flow port 204 to different degrees, so that the flow area of the first flow port 204 can be adjusted, and further higher-precision adjustment of the flow rate of the flue gas in unit time is realized.
To sum up: the smoke return amount in unit time of smoke can be conveniently and accurately adjusted through the smoke inlet adjusting component 1 and the fine adjusting component 2, so that the smoke return amount can be controlled to participate in mixed combustion in an optimal proportion, the problem that the air-fuel ratio is reduced due to excessive or excessively small smoke return amount is avoided, the arranged thin sealing rubber pad ensures that the peripheral air pipe 3 and the inner connecting cylinder 4 always have good sealing performance when the peripheral air pipe 3 rotates, the arranged hard rubber sleeve 16 enables the connecting sleeve 205 to always have good sealing performance between the connecting sleeve 205 and the air distributing cylinder 14 when the outer side surface of the air distributing cylinder 14 slides, the smoke circulation between the inner connecting cylinder 4 and the air distributing cylinder 14 is facilitated through the first circulation ports 204 and the second circulation ports 206 which are arranged to perform internal circulation to participate in combustion, and the smoke return amount adjusting precision in unit time is further improved through the synchronous insertion of the conical columns 202 which are arranged to the plurality of the first circulation ports 204.
The servo motor 9 and the igniter 17 can be purchased from the market, and the servo motor 9 and the igniter 17 are provided with a power supply, which is fully disclosed in the art, and therefore, the description is not repeated in the specification.
Claims (9)
1. The utility model provides a low nitrogen combustor of inner loop of flue gas, includes inscription section of thick bamboo, air injection section of thick bamboo and coaxial arrangement in the inside air reposition of redundant personnel section of thick bamboo of air injection section of thick bamboo, its characterized in that, inscription section of thick bamboo's one end threaded connection has the peripheral air pipe that sets up between inscription section of thick bamboo and air injection section of thick bamboo, the one end that the peripheral air pipe is close to the air injection section of thick bamboo is fixed with the air pipe shrinkage mouth with air injection section of thick bamboo port complex, inscription section of thick bamboo's outside is provided with the income cigarette adjusting part that adjusts flue gas reflux.
2. The smoke internal circulation low-nitrogen burner according to claim 1, wherein the smoke inlet adjusting component comprises a rotating seat fixed with the outer side wall of the inner connecting cylinder, a threaded sleeve is rotatably connected in the rotating seat through a bearing, the inner side surface of the threaded sleeve is in threaded connection with the outer side surface of the port of the peripheral air pipe, and threads on the inner side surface and the outer side surface of one end, close to the rotating seat, of the peripheral air pipe are arranged identically.
3. The smoke internal circulation low-nitrogen burner according to claim 2, wherein a plurality of meshing teeth are fixed on the outer side face of the threaded sleeve, the meshing teeth are distributed in an equidistant annular mode, and a transmission gear is connected to the meshing teeth in a meshing mode.
4. The smoke internal circulation low-nitrogen burner according to claim 2, wherein the threads on the inner and outer surfaces of one end of the peripheral air pipe, which is close to the rotating seat, are respectively covered with a thin sealing rubber pad.
5. The flue gas internal circulation low-nitrogen burner according to claim 2, wherein one end of the air pipe shrinkage port far away from the peripheral air pipe is in transmission connection with a fine adjustment assembly arranged between the air injection cylinder and the air diversion cylinder, the fine adjustment assembly comprises a connecting sleeve rotationally connected with one end of the air pipe shrinkage port far away from the peripheral air pipe, one end of the connecting sleeve far away from the air pipe shrinkage port is fixedly provided with a movable plate, a sealing plate positioned on one side of the movable plate is fixed between the air injection cylinder and the air diversion cylinder, a first circulation port and a second circulation port which are arranged in a staggered manner are respectively arranged on the side surfaces of the sealing plate and the movable plate, and a conical column which is suitable for being inserted with the first circulation port is fixed on the side surface of the movable plate close to the sealing plate.
6. The flue gas internal circulation low-nitrogen burner of claim 5, wherein a hard rubber sleeve is arranged between the inner side surface of the connecting sleeve and the outer side surface of the air diversion cylinder, and the hard rubber sleeve is fixedly attached to the inner side surface of the connecting sleeve.
7. The flue gas recirculation low nitrogen burner of claim 5, wherein said tapered column is integrally arranged at a-degree taper angle.
8. The flue gas internal circulation low nitrogen burner of claim 6, wherein a plurality of first and second flow openings are provided, and wherein a plurality of first and second flow openings are equally annularly distributed.
9. The flue gas recirculation low nitrogen burner of claim 7, wherein said tapered column is provided in plurality and corresponds to the first flow port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310849564.1A CN116989331A (en) | 2023-07-12 | 2023-07-12 | Low-nitrogen combustor with internal smoke circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310849564.1A CN116989331A (en) | 2023-07-12 | 2023-07-12 | Low-nitrogen combustor with internal smoke circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116989331A true CN116989331A (en) | 2023-11-03 |
Family
ID=88533088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310849564.1A Pending CN116989331A (en) | 2023-07-12 | 2023-07-12 | Low-nitrogen combustor with internal smoke circulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116989331A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118564919A (en) * | 2024-08-01 | 2024-08-30 | 杭州老板电器股份有限公司 | Blast burner and control method and device thereof |
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