CN208025506U - A kind of coal burner - Google Patents
A kind of coal burner Download PDFInfo
- Publication number
- CN208025506U CN208025506U CN201820140352.0U CN201820140352U CN208025506U CN 208025506 U CN208025506 U CN 208025506U CN 201820140352 U CN201820140352 U CN 201820140352U CN 208025506 U CN208025506 U CN 208025506U
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- China
- Prior art keywords
- air
- precombustion chamber
- main pipe
- wall
- coal
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Abstract
The utility model is related to a kind of coal burners,It is internally provided with precombustion chamber,It further include First air component,Secondary Air component and bluff body component,The First air component includes First air main pipe,Back-blowing cap and dense primary air piping,The input end of the First air main pipe is free end and is internally provided with pulverized coal concentrator,Its outlet end is arranged with dense primary air piping,There are light First air channels between the pipe outer wall and the inside pipe wall of First air main pipe of the dense primary air piping,The end of the dense primary air piping is arranged with back-blowing cap and extends to the center of precombustion chamber,The utility model carries out air-coal separating by First air component to First air,Enhance the formation of ignition and reducing atmosphere,Advantageously reduce NO_x formation,By bluff body component,Adapt to load variations and coal varitation,It is adaptable,Simultaneously,By Secondary Air component,Air cooling is carried out to the wall surface of precombustion chamber,To protect precombustion chamber,It effectively prevent coking.
Description
Technical field
The utility model belongs to coal-dust combustion device technical field, relates in particular to a kind of coal burner.
Background technology
Relative to the station boiler of large capacity, coal-burned industrial boiler has the characteristics that coal-fired flow is small, combustion space is small, leads
It causes steady condition of lighting the passion, furnace heat flowing and the combustion case of its burner all more difficult to control, it is comprehensive to restrict coal-burned industrial boiler
It promotes and applies.
In recent years, occurs the burner of several coal-burned industrial boilers in the market.Wherein, Beijing Coal science and technology is ground
The burning tissues principle that Jiu Yuan Co., Ltds use for reference Dr.schoppe burners devises the inverse spray bipyramid burner in center, compared to
Other vortex burners, the burner individually set up biconial return passage (precombustion chamber), and the secondary wind flow field by rotation is formed
Recirculating zone, by First air (coal air mixture) center, high temperature gases recirculating is strengthened in inverse spray, advantageously enhances breeze airflow
Flowing back, indoor gasification catches fire and burns, and is conducive to catch fire and burn, meanwhile, there is also return passage wall surfaces (especially to export
Near) coking, discharge tube overheating deforming, the problems such as discharged nitrous oxides concentration is high.Shanghai City special equipment supervision and inspection technology
Research institute designs low discharge coal-powder steady flame burner, the effect using inner second air cyclone and a mixture of powder and dust channel
Export setting bluff body, formed a stable recirculating zone, in recirculating zone full of by burner hearth central backflow Lai high-temperature flue gas,
Region on the outside of recirculating zone between main flow area forms incendivity primary mixture and hot backflow flue gas turbulent mixing zone.By
In there is larger radial velocity gradient on boundary, occur between flammable mixture and high-temperature flue gas strong quality, momentum and
Energy exchange, flammable mixture are constantly heated up, and reach ignition temperature initial burning, meanwhile, flame is propagated from inside to outside,
Heat is transmitted to the flue gas of reflux, makes flue gas that thermal energy is taken to upstream, then imparts heat to new flammable mixture, in precombustion chamber
Burning is stablized in interior formation.Although the design degree of filling is preferable, also forms and be easy to the ablaze flow field of breeze airflow and temperature
Environment, still, high-temperature flue gas are mixed with Secondary Air too early, and flame is burnt out too close to precombustion chamber wall surface there are wall surface slagging
Problem.
Utility model content
For various deficiencies of the prior art, to solve the above-mentioned problems, it is proposed that a kind of coal burner.
To achieve the above object, the utility model provides the following technical solutions：
A kind of coal burner, is internally provided with precombustion chamber, further includes First air component, Secondary Air component and bluff body group
Part, the First air component include First air main pipe, back-blowing cap and dense primary air piping, and the input end of the First air main pipe is
Free end and be internally provided with pulverized coal concentrator, outlet end is arranged with dense primary air piping, the inner cylinder of the pulverized coal concentrator with it is dense
Primary air piping is connected to, and outer barrel is connect with the inside pipe wall of First air main pipe, and the pipe outer wall and First air of the dense primary air piping are female
There are light First air channels, the end of the dense primary air piping to be arranged with back-blowing cap and extend to pre-burning between the inside pipe wall of pipe
The center of room, the end of the First air main pipe are located at the entrance of precombustion chamber, and the periphery of the First air main pipe is by interior
It is arranged with bluff body component and Secondary Air component successively outward.
Further, the end of the First air main pipe is equipped with the expansion for spraying light First air to the center of precombustion chamber
Mouthful, it is located at flow direction of the dense First air in dense primary air piping after back-blowing cap water conservancy diversion and is located in light First air channel
The flow direction of light First air is opposite.
Further, the precombustion chamber is cylinder-like structure, and input end has bullet, outlet end embedding by flanged joint
Enter inside boiler furnace, there are direct current side wall wind channels between the inner wall of the precombustion chamber and the outer wall of bullet.
Further, the Secondary Air component includes secondary air inlet and cyclone, and the secondary air inlet is located at burner
Outer wall on, and it is located at the outlet end of burner, and the cyclone is located at the input end of burner and it connect with bullet
And it communicates.
Further, the cyclone and bullet are respectively positioned on burner internal, and the outer wall and burner outer wall of precombustion chamber
Between there are secondary air channels.
Further, the bullet is internally provided with the cavity being connected to precombustion chamber, inside the cyclone and bullet
Cavity composition swirl secondary air channel.
Further, the bluff body component includes bluff body, sleeve and adjusting yoke, and the sleeve is set in First air main pipe
Periphery, one end are connect with bluff body, and the other end is connect with adjusting yoke.
Further, the adjusting yoke is arranged in parallel with First air main pipe.
Further, the bluff body is located between the input end and flaring of burner.
The utility model has the beneficial effects that：
Air-coal separating is carried out to First air by First air component, enhances the formation of ignition and reducing atmosphere,
NO_x formation is advantageously reduced, the First air main pipe by socket setting and dense primary air piping alleviate First air component
Weight adjusts bluff body position by adjusting yoke, not only improves recirculating zone and formed, and improves the controllability of bluff body, to adapt to
Load variations and coal varitation, it is adaptable, meanwhile, by secondary air channel and direct current side wall wind channel, to the wall of precombustion chamber
Face carries out air cooling and effectively prevent coking to protect precombustion chamber.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the combination schematic diagram of First air component and bluff body component.
In attached drawing：1- precombustion chambers, 2- burner outer walls, the input end of 3- burners, 4- First airs main pipe, 5- Pulverized Coal Concentrations
The dense primary air piping of device, 6-, 7- back-blowing caps, 8- flarings, 9- First airs, the light First airs of 10-, the dense First airs of 11-, 12- Secondary Airs
Import, 13- cyclones, 14- secondary air channels, 15- swirl secondary airs, 16- direct current side walls wind, 17- bullets, 18- Secondary Airs,
19- adjusting yokes, 20- sleeves, 21- bluff bodies.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, with reference to the utility model
Attached drawing carries out clear, complete description to the technical solution of the utility model, and based on the embodiment in the application, this field is general
Other similar embodiments that logical technical staff is obtained without making creative work, should all belong to the application
The range of protection.In addition, the direction word mentioned in following embodiment, such as "upper" "lower" " left side " " right side " etc. are only refer to the attached drawing
Direction, therefore, the direction word used is for illustrative and not limiting the invention.
The utility model is described in further detail with preferred embodiment below in conjunction with the accompanying drawings.
Embodiment one：
As shown in Figs. 1-2, a kind of coal burner comprising precombustion chamber 1, First air component, Secondary Air component and bluff body
Component, wherein precombustion chamber 1, First air component, Secondary Air component and bluff body component are respectively positioned on burner internal.
The First air component includes First air main pipe 4, back-blowing cap 7 and dense primary air piping 6, the First air main pipe 4
Input end be free end and to be internally provided with pulverized coal concentrator 5, outlet end is arranged with dense primary air piping 6, the Pulverized Coal Concentration
The inner cylinder of device 5 is connected to dense primary air piping 6, and outer barrel is connect with the inside pipe wall of First air main pipe 4, that is to say, that First air 9 into
After entering First air main pipe 4, First air 9 is separated into light First air 10 and dense First air 11 by pulverized coal concentrator 5, wherein dense primary
Inner cylinder of the wind 11 through pulverized coal concentrator 5 enters dense primary air piping 6, pipe outer wall and the First air main pipe 4 of the dense primary air piping 6
There are light First air channels, outer barrel of the light First air 10 through pulverized coal concentrator 5 to enter light First air channel between inside pipe wall.
The end of the dense primary air piping 6 is arranged with back-blowing cap 7 and extends to the center of precombustion chamber 1, is located at dense
Flow direction of the dense First air 11 after 7 water conservancy diversion of back-blowing cap in primary air piping 6 and light one in light First air channel
The flow direction of secondary wind 10 is opposite, that is to say, that the reverse flow after 7 water conservancy diversion of back-blowing cap of dense First air 11, and guide high temperature
Smoke backflow.Meanwhile the end of the First air main pipe 4 is located at the entrance of precombustion chamber 1, is equipped with for precombustion chamber 1
The flaring 8 of light First air 10 is sprayed in center, and light First air 10 is sprayed through flaring 8 is positive, and the effect for being flared 8 is to reduce light one
10 speed of secondary wind reduces the adverse effect to 11 blowback injection of dense First air.Air-coal separating is carried out to First air 9, is made dense primary
For wind 11 closer to 1 center of precombustion chamber, air quantity is small, and required ignition heat is few, is conducive to coal dust and catches fire in time, reduces amount of oxygen, pre-burning
Room 1 is centrally formed strong reducing property atmosphere, can inhibit the generation of nitrogen oxides, and flame front is controlled as far as possible in precombustion chamber 1
Center, flame are not easy to wash away wall surface and avoid the formation of slagging.
The periphery of the First air main pipe 4 is arranged with bluff body component and Secondary Air component successively from inside to outside, described secondary
Wind component includes secondary air inlet 12 and cyclone 13, and the secondary air inlet 12 is located on the outer wall 2 of burner, and it is located at
The outlet end of burner, the cyclone 13 is located at the input end 3 of burner and it connect and communicate with bullet 17.Namely
It says, the cyclone 13 and bullet 17 are respectively positioned on burner internal, meanwhile, between the outer wall and burner outer wall 2 of precombustion chamber 1
There are secondary air channels 14.The bullet 17 is internally provided with the cavity being connected to precombustion chamber 1, the cyclone 13 and taper
Cavity composition swirl secondary air channel inside body 17.In addition, the precombustion chamber 1 is cylinder-like structure, input end passes through method
Orchid is connected with bullet 17, and outlet end is embedded in inside boiler furnace, the inner wall of the precombustion chamber 1 and the outer wall of bullet 17 it
Between there are direct current side wall wind channels.That is, after Secondary Air 18 enters, it is most of to 3 reverse flow of input end of burner
Secondary Air 18 enter swirl secondary air channel through cyclone 13, that is, form swirl secondary air 15, small part Secondary Air 18 enters
Direct current side wall wind channel forms the direct current side wall wind 16 flowed along 1 internal face of precombustion chamber, carried out to the wall surface of precombustion chamber 1 empty
Air cooling effectively prevent coking to protect precombustion chamber 1.
The bluff body component includes bluff body 21, sleeve 20 and adjusting yoke 19, and the sleeve 20 is set in First air main pipe 4
Periphery, one end connect with bluff body 21, and the other end is connect with adjusting yoke 19.Wherein, the adjusting yoke 19 with it is primary
Wind main pipe 4 is arranged in parallel, and the bluff body 21 is located between the input end 3 of burner and flaring 8.It can make set by adjusting yoke 19
Cylinder 20 moves horizontally, and to adjust the position of bluff body 21, not only improves recirculating zone and is formed, and improves the controllability of bluff body 21,
It is adaptable to adapt to load variations and coal varitation.Meanwhile coordinating adjustment 13 blade angle of cyclone, flame position can be changed
It sets and shape, controls combustion state, effectively prevent slagging, reduce nitrogen oxides and create conditions.In the present embodiment, nitrogen oxides row
It puts concentration and is less than 200mg/m3, realize efficient, the low nitrogen of coal dust, stablize burning.
The utility model is described in detail above, it is described above, only the preferred embodiment of the utility model and
, when the utility model practical range cannot be limited, i.e., all according to the made equivalent changes and modifications of the application range, it all should still belong to this
In utility model covering scope.
Claims (9)
1. a kind of coal burner, is internally provided with precombustion chamber, which is characterized in that further include First air component, Secondary Air component
With bluff body component, the First air component includes First air main pipe, back-blowing cap and dense primary air piping, the First air main pipe
Input end is free end and is internally provided with pulverized coal concentrator, and outlet end is arranged with dense primary air piping, the pulverized coal concentrator
Inner cylinder is connected to dense primary air piping, and outer barrel is connect with the inside pipe wall of First air main pipe, the pipe outer wall of the dense primary air piping with
There are light First air channels, the end of the dense primary air piping to be arranged with back-blowing cap and prolong between the inside pipe wall of First air main pipe
The center of precombustion chamber is extended to, the end of the First air main pipe is located at the entrance of precombustion chamber, the First air main pipe
Periphery is arranged with bluff body component and Secondary Air component successively from inside to outside.
2. coal burner according to claim 1, which is characterized in that the end of the First air main pipe be equipped with for
The flaring of light First air is sprayed in the center of precombustion chamber, is located at the dense First air in dense primary air piping after back-blowing cap water conservancy diversion
Flow direction it is opposite with the flow direction of light First air in the light First air channel.
3. coal burner according to claim 2, which is characterized in that the precombustion chamber is cylinder-like structure, import
There is a bullet at end by flanged joint, and outlet end is embedded in inside boiler furnace, the inner wall of the precombustion chamber and bullet outside
There are direct current side wall wind channels between wall.
4. coal burner according to claim 3, which is characterized in that the Secondary Air component include secondary air inlet and
Cyclone, the secondary air inlet are located on the outer wall of burner, and it is located at the outlet end of burner, and the cyclone is located at
The input end of burner and its connect and communicate with bullet.
5. coal burner according to claim 4, which is characterized in that the cyclone and bullet are respectively positioned on burner
Inside, and there are secondary air channels between the outer wall and burner outer wall of precombustion chamber.
6. coal burner according to claim 4, which is characterized in that the bullet is internally provided with to be connected to precombustion chamber
Cavity, the cavity composition swirl secondary air channel inside the cyclone and bullet.
7. according to any coal burners of claim 3-6, which is characterized in that the bluff body component includes bluff body, set
Cylinder and adjusting yoke, the sleeve are set in the periphery of First air main pipe, and one end is connect with bluff body, and the other end is drawn with adjusting
Bar connects.
8. coal burner according to claim 7, which is characterized in that the adjusting yoke is parallel with First air main pipe to be set
It sets.
9. coal burner according to claim 7, which is characterized in that the bluff body is located at input end and the expansion of burner
Between mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820140352.0U CN208025506U (en) | 2018-01-26 | 2018-01-26 | A kind of coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820140352.0U CN208025506U (en) | 2018-01-26 | 2018-01-26 | A kind of coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208025506U true CN208025506U (en) | 2018-10-30 |
Family
ID=63903306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820140352.0U Expired - Fee Related CN208025506U (en) | 2018-01-26 | 2018-01-26 | A kind of coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208025506U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043898A (en) * | 2019-04-10 | 2019-07-23 | 清华大学 | Multistage reflux reverse spray type vortex burner |
| WO2022042732A1 (en) * | 2020-08-31 | 2022-03-03 | 煤科院节能技术有限公司 | Two-channel burner and method of use therefor, and multi-channel single-cone burner and method of use therefor |
| CN114877322A (en) * | 2022-04-20 | 2022-08-09 | 东方电气集团东方锅炉股份有限公司 | Flame regulation formula cyclone burner |
-
2018
- 2018-01-26 CN CN201820140352.0U patent/CN208025506U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043898A (en) * | 2019-04-10 | 2019-07-23 | 清华大学 | Multistage reflux reverse spray type vortex burner |
| CN110043898B (en) * | 2019-04-10 | 2020-02-21 | 清华大学 | Multi-stage backflow reverse-spraying type cyclone pulverized coal burner |
| WO2020207318A1 (en) * | 2019-04-10 | 2020-10-15 | 清华大学 | Multistage backflow reverse injection type swirl pulverized coal burner |
| WO2022042732A1 (en) * | 2020-08-31 | 2022-03-03 | 煤科院节能技术有限公司 | Two-channel burner and method of use therefor, and multi-channel single-cone burner and method of use therefor |
| CN114877322A (en) * | 2022-04-20 | 2022-08-09 | 东方电气集团东方锅炉股份有限公司 | Flame regulation formula cyclone burner |
| CN114877322B (en) * | 2022-04-20 | 2023-11-03 | 东方电气集团东方锅炉股份有限公司 | Flame regulation type cyclone burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181030 Termination date: 20200126 |