CN112361335B - Combustor based on multizone burning - Google Patents
Combustor based on multizone burning Download PDFInfo
- Publication number
- CN112361335B CN112361335B CN202011357377.4A CN202011357377A CN112361335B CN 112361335 B CN112361335 B CN 112361335B CN 202011357377 A CN202011357377 A CN 202011357377A CN 112361335 B CN112361335 B CN 112361335B
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- gas
- pipe
- combustion
- annular
- burner
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- 239000007789 gas Substances 0.000 claims abstract description 128
- 238000002485 combustion reaction Methods 0.000 claims abstract description 62
- 239000002737 fuel gas Substances 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 239000007921 spray Substances 0.000 claims abstract description 24
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 23
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 238000007373 indentation Methods 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- 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
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
The invention provides a combustor based on multi-zone combustion, which comprises a combustor barrel, a fuel gas injection system and a flame stabilizing disc, wherein the combustor barrel is provided with a fuel gas injection system; the fuel gas injection system and the flame stabilizing disc are arranged in the combustor cylinder; the gas injection system comprises a central gas pipe and a plurality of annular gas injection pipes which are rotationally symmetrically arranged by taking the central gas pipe as a center; the tail end of the central gas spray pipe is provided with a plurality of central gas through holes; the gas injection system further comprises a plurality of gas branch pipes which are rotationally symmetrically arranged by taking the central gas pipe as a center, and one end of each gas branch pipe is communicated with the annular gas spray pipe; a first diversion through hole is formed in the gas branch pipe along the radial direction of the burner cylinder body, and a second diversion through hole is formed in the tail end of the gas branch pipe, which is far away from the annular gas spray pipe; the tail end of the annular gas spray pipe is provided with an annular gas through hole; by the aid of the technical scheme, combustion efficiency can be improved, and the burner is heated uniformly.
Description
Technical Field
The invention relates to the field of combustors, in particular to a combustor based on multi-zone combustion.
Background
Conventional burners have not reached the temperature requirements of today's industry level at all. The burner has the defect of incomplete combustion, which causes great damage to the environment, harm to the body of a user, and the residual of fuel gas causes danger rise; and because the low combustion efficiency in the combustion process of the burner is a main factor for generating NOx, the discharged NOx causes pollution to the atmosphere.
Today, conventional burners suffer from a number of drawbacks: the gas and air contact time is short, the mixing is uneven, the combustion is insufficient, the energy is wasted, the environment is polluted, the flame temperature during the combustion is low, and the gas and air burner is not suitable for being applied to high-temperature production places.
Disclosure of Invention
The invention aims to provide a combustor based on multi-zone combustion, which can improve combustion efficiency and enable the combustor to be heated uniformly.
In order to solve the technical problems, the invention provides a combustor based on multi-zone combustion, which comprises a combustor cylinder, a fuel gas injection system and a flame stabilizing disc; the fuel gas injection system and the flame stabilizing disc are arranged in the combustor cylinder; the gas injection system comprises a central gas pipe and a plurality of annular gas injection pipes which are rotationally symmetrically arranged by taking the central gas pipe as a center; the tail end of the central gas spray pipe is provided with a plurality of central gas through holes; the gas injection system further comprises a plurality of gas branch pipes which are rotationally symmetrically arranged by taking the central gas pipe as a center, and one end of each gas branch pipe is communicated with the annular gas spray pipe; a first diversion through hole is formed in the gas branch pipe along the radial direction of the burner cylinder body, and a second diversion through hole is formed in the tail end of the gas branch pipe, which is far away from the annular gas spray pipe; the tail end of the annular gas spray pipe is provided with an annular gas through hole;
The flame stabilizing disc comprises a rotational flow inner ring, a closed spacer ring and a rotational flow outer ring which are concentrically arranged from inside to outside; a plurality of first-stage swirl blades are uniformly arranged between the swirl inner ring and the closed spacer ring; a plurality of second-stage swirl blades are uniformly arranged between the swirl outer circular ring and the closed spacing ring; the second-stage swirl vanes are provided with vane grooves; the inner part of the cyclone inner ring is also provided with a slotting blunt body, and the slotting blunt body is provided with a plurality of slotting small holes;
The burner cylinder is sequentially provided with a hood, a throat and a cylinder body from one end to the other end; an annular gas inlet ring is arranged at one end of the cylinder body connected with the throat, and the annular gas spray pipe is communicated with the annular gas inlet ring; the annular gas inlet ring is also communicated with an annular gas inlet; the cylinder body is also communicated with a central gas inlet which is communicated with the central gas pipe;
the central gas pipe and the slotted blunt body form a first combustion zone; the first-stage swirl vanes and the gas branch pipes form a second combustion zone; the second-stage swirl vanes and the annular gas spray pipe form a third combustion zone.
In a preferred embodiment, the heights of the inner swirl ring, the closed spacer ring and the outer swirl ring are sequentially increased, so that the flame stabilizing disc is in middle low-periphery high distribution.
In a preferred embodiment, the first stage swirl vanes are oriented at an angle radially spaced from the burner cylinder.
In a preferred embodiment, the second stage swirl vanes are disposed at 45 ° from the radial direction of the burner cylinder.
In a preferred embodiment, a plurality of notches are symmetrically arranged on the outer side of the rotational flow outer ring in a rotational mode, and the notches are used for fixing the annular gas spray pipe.
In a preferred embodiment, the throat is tapered in diameter in the direction from the barrel to the hood, the throat and hood forming a combustion chamber; the flame stabilizing disc and the gas injection system are positioned in the combustion chamber.
In a preferred embodiment, the fuel gas branch pipes are four and uniformly distributed in the combustion chamber, and are arranged at intervals of 90 degrees.
In a preferred embodiment, the annular gas nozzles are provided in 12.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
The invention provides a combustor based on multi-zone combustion, wherein a gas injection system and a flame stabilizing disc are combined to form an optimized structure of multi-zone combustion, so that the combustor with good gas mixing quality and high combustion efficiency is formed. The sufficient fuel gas of the air inlet system is ensured, and the local high temperature in the combustion process is avoided, so that the mixing quality of the fuel gas and air is improved, stable flame is formed, and the combustion efficiency is improved; the arrangement of the multistage swirl vanes is favorable for forming strong rotation disturbance, so that an air dynamic field more suitable for combustion is formed in the furnace, the disturbance of combustion air flow is greatly enhanced, the air flow loss is reduced, and the combustion efficiency is further improved. Through this high-efficient combustor, the gas ignition speed is fast, and stable in flame and gas are abundant, the combustion state is stable, and the probability of taking place tempering and take off the fire reduces, has the advantage that combustion efficiency is high and the burning is comparatively even.
Drawings
FIG. 1 is a schematic view of a burner based on multi-zone combustion in a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the structure of a burner cylinder in a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram showing the structural arrangement of a fuel gas injection system according to a preferred embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a partial structural arrangement of a fuel gas injection system in accordance with a preferred embodiment of the present invention;
FIG. 5 is a schematic view showing the structure of a flame stabilizing tray according to a preferred embodiment of the present invention;
Fig. 6 is a schematic view showing the bottom structure of the flame stabilizing tray in the preferred embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
A burner based on multi-zone combustion, referring to fig. 1 to 5, comprises a burner cylinder 1, a gas injection system 2 and a flame stabilizing plate 3; the gas injection system 2 and the flame stabilizing disc 3 are arranged in the burner cylinder 1; the gas injection system 2 comprises a central gas pipe 206 and a plurality of annular gas injection pipes 201 which are rotationally symmetrically arranged with the central gas pipe 206 as a center; the tail end of the central gas spray pipe is provided with a plurality of central gas through holes 207; the gas injection system 2 further comprises a plurality of gas branch pipes 203 which are rotationally symmetrically arranged with the central gas pipe 206 as a center, and one end of each gas branch pipe 203 is communicated with the annular gas spray pipe 201; a first diversion through hole 204 is formed in the gas branch pipe 203 along the radial direction of the burner cylinder 1, and a second diversion hole 205 is formed in the end, away from the annular gas spray pipe 201, of the gas branch pipe 203; the tail end of the annular gas spray pipe 201 is provided with an annular gas through hole 202; in this embodiment, the fuel gas branch pipes 203 are four and uniformly distributed in the combustion chamber, and are disposed at intervals of 90 ° between every two. The number of the annular gas nozzles 201 is 12.
The flame stabilizing disc 3 comprises a rotational flow inner circular ring 307, a closed spacing ring 304 and a rotational flow outer circular ring 301 which are concentrically arranged from inside to outside; specifically, the heights of the inner swirl ring 307, the closed spacer ring 304 and the outer swirl ring 301 are sequentially increased, so that the flame stabilizing disc 3 is in low middle and high peripheral distribution, forms multi-stage swirl, forms strong rotation disturbance, enables fuel gas and air to be mixed more fully, is also beneficial to forming a negative pressure backflow area at the slotted blunt body 306, ensures timely backflow of high-temperature flue gas, and enables combustion to be more sufficient. The outer side of the swirl outer ring 301 is provided with a plurality of notches 309 in rotational symmetry, said notches 309 being used for fixing the annular gas lance 201.
A plurality of first-stage swirl blades 305 are uniformly arranged between the swirl inner ring 307 and the closed spacer 304; a plurality of second-stage swirl blades 302 are uniformly arranged between the swirl outer circular ring 301 and the closed spacing ring 304; the second stage swirl vanes 302 are provided with vane grooves 303; the inner circular ring 307 of the cyclone is further provided with a slit blunt body 306, and the slit blunt body 306 is provided with a plurality of slit small holes 308.
The burner cylinder 1 is provided with a hood 101, a throat 102 and a cylinder body 106 from one end to the other end in sequence; the diameter of the throat 102 gradually decreases along the direction from the barrel 106 to the hood 101, and the throat 102 and the hood 101 form a combustion chamber; the flame stabilizing disc 3 and the gas injection system 2 are positioned in the combustion chamber. The fuel gas and the air are fully mixed in the combustion chamber, and in the process, good vortex motion can be formed, so that the mixing quality is improved, and the generation of NOx is inhibited.
An annular gas inlet ring 103 is arranged at one end of the barrel 106 connected with the throat 102, and the annular gas spray pipe 201 is communicated with the annular gas inlet ring 103; the annular gas inlet ring 103 is also communicated with an annular gas inlet 104; the barrel 106 is also communicated with a central gas inlet 105, and the central gas inlet 105 is communicated with the central gas pipe 206.
Specifically, the first stage swirl vanes 305 are disposed at an angle radially spaced from the burner cylinder 1. In the present embodiment, the second stage swirl vanes 302 are disposed in a direction spaced 45 ° from the radial direction of the combustor basket 1.
The central gas pipe 206 and the slotted bluff body 306 form a first combustion zone; the swirl inner ring 307 is provided with a slit blunt body 306, fuel gas is introduced from the central fuel gas pipe 206, is sprayed out through the central fuel gas through hole 207 and is mixed with air flowing in through the slit small hole 308, swirl is generated near the center, and the fuel gas is fully mixed and combusted, and because the number of the fuel gas through holes is more and the positions are distributed, the generated flames are not accumulated together in a concentrated way, the flame propagation speed is improved, and the combustion efficiency is improved.
The first stage swirl vanes 305 and the gas manifold 203 form a second combustion zone; the gas branch pipe 203 is uniformly provided with 3 first diversion through holes 204 along the radial direction of the burner cylinder 1, and the end face of the tail end of the gas branch pipe 203 is provided with 1 second diversion through hole 205; the fuel gas is sprayed through the fuel gas branch pipe 203, so that a large amount of fuel gas and air enter the first-stage cyclone blade 305 to be fully mixed, and the introduced fuel gas can be ignited quickly and timely; and other gases can form a good air dynamic field with the fuel gas in the burner, so that the combustion condition of the fuel gas is stabilized, a small flame of rotary air flow is formed, the temperature of the sprayed flame is lower, the condition of backfire or fire release in the furnace can be effectively avoided, and the generation of NOx is inhibited.
The second stage swirl vanes 302 form a third combustion zone with the annular gas lance 201. The annular gas spray pipes 201 are uniformly arranged in 12 along the circumferential direction of the flame stabilizing disc 3 and are combined with the rotational flow outer circular ring 301, and 2 annular gas through holes 202 facing the center of the flame stabilizing disc 3 are formed in the end face of each annular gas spray pipe 201; the second-stage swirl blades 302 and the first-stage swirl blades 305 form a multi-stage blade through the closed separating ring 304, and blade grooves 303 are formed in the surfaces of the second-stage swirl blades 302, so that a negative pressure backflow area is formed in the center of swirl, the timely backflow of high-temperature flue gas is ensured, and the combustion is more sufficient. The gas is jointly introduced through the annular gas through hole 202 of the annular gas nozzle 201 and the first diversion through hole 204 of the gas branch pipe 203, and forms vortex motion on the second stage of the cyclone blades 302, so that the mixing quality of the gas and the air is increased, and the combustion efficiency is improved.
The invention provides a combustor based on multi-zone combustion, wherein a gas injection system 2 and a flame stabilizing disc 3 are combined to form an optimized structure of multi-zone combustion, so that the combustor with good gas mixing quality and high combustion efficiency is formed. The sufficient fuel gas of the air inlet system is ensured, and the local high temperature in the combustion process is avoided, so that the mixing quality of the fuel gas and air is improved, stable flame is formed, and the combustion efficiency is improved; the arrangement of the multistage swirl vanes is favorable for forming strong rotation disturbance, so that an air dynamic field more suitable for combustion is formed in the furnace, the disturbance of combustion air flow is greatly enhanced, the air flow loss is reduced, and the combustion efficiency is further improved. Through this high-efficient combustor, the gas ignition speed is fast, and stable in flame and gas are abundant, the combustion state is stable, and the probability of taking place tempering and take off the fire reduces, has the advantage that combustion efficiency is high and the burning is comparatively even.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.
Claims (6)
1. A burner based on multi-zone combustion, characterized in that: comprises a burner cylinder, a fuel gas injection system and a flame stabilizing disc; the fuel gas injection system and the flame stabilizing disc are arranged in the combustor cylinder; the gas injection system comprises a central gas pipe and a plurality of annular gas injection pipes which are rotationally symmetrically arranged by taking the central gas pipe as a center; the tail end of the central gas spray pipe is provided with a plurality of central gas through holes; the gas injection system further comprises a plurality of gas branch pipes which are rotationally symmetrically arranged by taking the central gas pipe as a center, and one end of each gas branch pipe is communicated with the annular gas spray pipe; a first diversion through hole is formed in the gas branch pipe along the radial direction of the burner cylinder body, and a second diversion through hole is formed in the tail end of the gas branch pipe, which is far away from the annular gas spray pipe; the tail end of the annular gas spray pipe is provided with an annular gas through hole;
The flame stabilizing disc comprises a rotational flow inner ring, a closed spacer ring and a rotational flow outer ring which are concentrically arranged from inside to outside, and the heights of the rotational flow inner ring, the closed spacer ring and the rotational flow outer ring are sequentially increased, so that the flame stabilizing disc is in middle low-circumference high distribution; a plurality of first-stage swirl blades are uniformly arranged between the swirl inner ring and the closed spacer ring; a plurality of second-stage swirl blades are uniformly arranged between the swirl outer ring and the closed spacing ring; the second-stage swirl vanes are provided with vane grooves; the inner part of the cyclone inner ring is also provided with a slotting blunt body, and the slotting blunt body is provided with a plurality of slotting small holes;
The burner cylinder is sequentially provided with a hood, a throat and a cylinder body from one end to the other end; an annular gas inlet ring is arranged at one end of the cylinder body connected with the throat, and the annular gas spray pipe is communicated with the annular gas inlet ring; the annular gas inlet ring is also communicated with an annular gas inlet; the cylinder body is also communicated with a central gas inlet which is communicated with the central gas pipe;
the central gas pipe and the slotted blunt body form a first combustion zone; the first-stage swirl vanes and the gas branch pipes form a second combustion zone; the second-stage swirl vanes and the annular gas spray pipe form a third combustion zone.
2. The multi-zone combustion based burner of claim 1 wherein the second stage swirl vanes are disposed at 45 ° radial spacing from the burner barrel.
3. The burner based on multi-zone combustion according to claim 1, characterized in that the outer side of the swirl outer ring is rotationally symmetrically provided with a plurality of indentations for fixing the annular gas lance.
4. The burner of claim 1, wherein the throat tapers in diameter in the barrel-to-hood direction, the throat and hood forming a combustion chamber; the flame stabilizing disc and the gas injection system are positioned in the combustion chamber.
5. The burner based on multi-zone combustion according to claim 1, wherein the number of gas branches is four, evenly distributed in the combustion chamber, and arranged at a 90 ° interval between two.
6. The burner based on multi-zone combustion according to claim 1, wherein the annular gas nozzles are provided with 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357377.4A CN112361335B (en) | 2020-11-27 | 2020-11-27 | Combustor based on multizone burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357377.4A CN112361335B (en) | 2020-11-27 | 2020-11-27 | Combustor based on multizone burning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112361335A CN112361335A (en) | 2021-02-12 |
| CN112361335B true CN112361335B (en) | 2024-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011357377.4A Active CN112361335B (en) | 2020-11-27 | 2020-11-27 | Combustor based on multizone burning |
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| Country | Link |
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| CN (1) | CN112361335B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984508B (en) * | 2021-02-24 | 2021-12-28 | 西安交通大学 | Hydrogen injection type ammonia low-nitrogen cyclone burner |
| CN113566194A (en) * | 2021-07-08 | 2021-10-29 | 华侨大学 | Cyclone burner based on multi-nozzle structure |
| EP4400766A1 (en) * | 2021-09-09 | 2024-07-17 | FCT Holdings Pty Ltd | Low nox emission burner and operating method for reducing nox formation applied to an iron ore pellet sintering and/or hardening method |
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| CN109297018A (en) * | 2017-07-24 | 2019-02-01 | 福州华夏蓝天信息科技有限公司 | A kind of low nitrogen burner |
| CN111520717A (en) * | 2020-04-09 | 2020-08-11 | 华侨大学 | Hierarchical low-nitrogen gas burner based on rotational flow |
| CN214581074U (en) * | 2020-11-27 | 2021-11-02 | 华侨大学 | Combustor based on multi-zone combustion |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101504451B1 (en) * | 2014-02-10 | 2015-03-19 | 최영환 | Gas burner for low NOx |
| CN106247338B (en) * | 2016-08-29 | 2018-05-25 | 煤科院节能技术有限公司 | A kind of multi fuel burner of rapid interchangeable |
| CN208139271U (en) * | 2017-12-30 | 2018-11-23 | 福建华夏蓝天科技有限公司 | A kind of low nitrogen burner |
| CN109539251B (en) * | 2018-12-14 | 2024-07-09 | 罗诺克兹（北京）能源设备技术有限公司 | Ultralow nitrogen combustor |
| CN211902870U (en) * | 2019-12-23 | 2020-11-10 | 清华大学 | High-temperature flue gas multi-stage backflow low-nitrogen combustor |
| CN111457371B (en) * | 2020-05-12 | 2024-06-07 | 华侨大学 | Low nitrogen burner |
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2020
- 2020-11-27 CN CN202011357377.4A patent/CN112361335B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297018A (en) * | 2017-07-24 | 2019-02-01 | 福州华夏蓝天信息科技有限公司 | A kind of low nitrogen burner |
| CN111520717A (en) * | 2020-04-09 | 2020-08-11 | 华侨大学 | Hierarchical low-nitrogen gas burner based on rotational flow |
| CN214581074U (en) * | 2020-11-27 | 2021-11-02 | 华侨大学 | Combustor based on multi-zone combustion |
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| CN112361335A (en) | 2021-02-12 |
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