CN104676585B - A kind of coal-powder boiler C-shaped DC burner - Google Patents
A kind of coal-powder boiler C-shaped DC burner Download PDFInfo
- Publication number
- CN104676585B CN104676585B CN201510119857.XA CN201510119857A CN104676585B CN 104676585 B CN104676585 B CN 104676585B CN 201510119857 A CN201510119857 A CN 201510119857A CN 104676585 B CN104676585 B CN 104676585B
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- Prior art keywords
- coal
- spout
- shaped
- burner
- powder boiler
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/10—Nozzle tips
Abstract
The present invention provides a kind of coal-powder boiler C-shaped DC burner, the burner is installed on coal-powder boiler, the burner includes sequentially connected first direct current pipeline, arc pipe, the second direct current pipeline and spout, the outer wall of the spout is recessed inwardly, the end cross-sectional of spout forms the shape of at least one C-shaped groove, coal dust forms the C-shaped jet stream in cross section after burner hearth is sprayed into, caught fire and coal dust, and then its power stream part of igniting of successively igniting by way of two-sided catch fire flammule respectively in the point of C-shaped jet stream and its neighbouring both sides.Burner of the present invention has the comprehensive advantage that combustion stability is strong, after-flame degree is high, NOx emission is low.The difficult problem that catches fire of anthracite, meager coal, lignite and soft coal can be solved, significantly improving improves coal-powder boiler combustibility.
Description
Technical field
The present invention relates to a kind of coal-powder boiler C-shaped DC burner.
Background technology
In the coal-powder boiler using DC burner, catching fire for coal dust is the important step of coal dust firing.Coal dust catches fire
Be coal dust jet stream rely on environment flue gas (flame) convective mass transfer, realized when breeze airflow is brought up to ignition temperature.In order to
Reinforcing is caught fire, and the technology of generally use mainly has the convection current for reducing ignition heat and the exterior flue gas of increase, wherein reducing ignition heat again
It is divided to two kinds of monoblock type and partial style；Monoblock type is so that First air integrally reduces ignition heat, such as reduces the wind speed of First air, allows coal
Powder air-coal separating, so as to improve wind-warm syndrome etc.；A part for coal dust reduces its ignition heat by partial style, allows it first
Fire, mostly using various smoke backflow measures, such as sets various bluff bodies in burner nozzle, or in burner nozzle surrounding
Special-shaped boss etc. is set.Convection current by increasing exterior flue gas mainly includes arranging opposing tangential circle or expansion burner hearth circle of contact etc.
Apply.These measures and technology have certain steady combustion effect, but also still have some deficits under actual working state, in practical operation
Acquire a certain degree of difficulty.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of coal-powder boiler C-shaped direct current simple in structure, work efficiency is high
Burner, to overcome the drawbacks described above of the prior art.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：A kind of coal-powder boiler C-shaped DC burner,
The burner is installed on coal-powder boiler, and the burner includes sequentially connected first direct current pipeline, arc pipe, second straight
Flow tube road and spout, the outer wall of the spout is recessed inwardly, and the end cross-sectional of spout forms the shape of at least one C-shaped groove
Shape, the part that the C-shaped groove is connected with spout outer wall form the C-shaped sharp portion of protrusion.
Preferably, the main body of the end cross-sectional of the spout is rectangular configuration, and a middle side part of the rectangular configuration is inside
It is recessed, the outwardly two C-shaped points of periphery formation for forming a C-shaped groove, C-shaped groove both ends and rectangular configuration in both ends
Sharp portion.
Preferably, the main body of the end cross-sectional of the spout is circle, and the circle is equipped with two connected C-shapeds
Groove.
Preferably, the C-shaped sharp portion of the protrusion is equipped with the sharp end of fork.
Preferably, the spout is connect with the second direct current pipeline by being weldingly connected.
Preferably, surrounding air passage is equipped with along the outer wall of the spout, the surrounding air passage is connected with air supply device
Connect.
Preferably, deflector is equipped with the arc pipe.
As described above, a kind of coal-powder boiler C-shaped DC burner of the present invention, has the advantages that：
C-shaped groove at the burner nozzle of the present invention is the direction of flow met to burner hearth swirling eddy, in the C-shaped of spout
Groove location can form reducing zone, therefore NOx effectively can be reduced to N2, promote coal-powder boiler low-nitrogen discharged.The present invention
Flammule fire area is mainly formed by C-shaped sharp portion, this region relative surface area is larger, and coal dust relative concentration is higher,
The required ignition heat that catches fire is relatively low, coal dust easily fight and can stablize burning, therefore small fire point big fire and double-sided ignition can be passed through
Principle ahead of time catch fire and promote the raising of Combustion Efficiency for Pulverized Fired Boiler.It is of the invention to be fired with existing rectangular spout or circular spout
Burner is compared, and can also increase considerably catch fire surface area of the coal dust jet stream in burner hearth.In summary, the present invention can improve combustion
The combustion stability energy of burner, solves the difficult problem that catches fire of anthracite, meager coal, lignite and soft coal, so as to improve coal dust
Stove combustion characteristics, effectively improves peak modulation capacity and efficiency of combustion, promotes coal-powder boiler low NOx drainage.
Brief description of the drawings
Fig. 1 is structure chart of the present invention.
Fig. 2 is the nozzle exit schematic diagram of the present invention.
Fig. 3 is position view of the present invention on coal-powder boiler.
Fig. 4 is the working effect figure of the present invention.
Fig. 5 is the nozzle exit schematic diagram of the present invention.
Fig. 6 is the nozzle exit schematic diagram of the present invention.
Fig. 7 is the nozzle exit schematic diagram of the present invention.
Fig. 8 is a kind of preferred embodiment schematic cross-section of spout of the present invention.
In figure：1 burner, 11 first direct current pipeline
12 arc pipe, 13 second direct current pipeline
14 spout, 121 deflector
141 C-shaped groove, 142 C-shaped sharp portion
143 sharp end, 2 coal-powder boiler
3 surrounding air passages
Embodiment
Structure, ratio, size depicted in Figure of description etc., only to coordinate the revealed content of specification, with
Understand for those skilled in the art and read, be not limited to the enforceable qualifications of the present invention, therefore do not have technically
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, can be generated not influencing the present invention
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents can be covered.Meanwhile
Cited such as " on ", " under ", "front", "rear", " centre " term, are merely convenient to the clear of narration in this specification, and
It is not used to limit the enforceable scope of the present invention, its relativeness is altered or modified, in the case where changing technology contents without essence, when
Also it is considered as the enforceable category of the present invention.
As Figure 1-Figure 4, a kind of coal-powder boiler C-shaped DC burner of the present invention, the burner 1 are installed on coal-powder boiler 2
On, coal-powder boiler DC burner is divided into a wind combustor for carrying coal dust and takes aeriferous secondary wind combustor, the present invention
Described in burner 1 be for carrying coal dust wind combustor, burner 1 of the invention replaces cloth with secondary wind combustor
Put, secondary wind combustor is arranged as in the bottom of coal-powder boiler 2.The burner 1 of the present invention includes sequentially connected first direct current
Pipeline 11, arc pipe 12, the second direct current pipeline 13 and spout 14, the outer wall of the spout 14 is recessed inwardly, spout 14
End cross-sectional forms the shape of at least one C-shaped groove 141, and the C-shaped groove 141 is formed with the part that spout outer wall is connected
The C-shaped sharp portion 142 of protrusion.The first direct current pipeline 11 is connected with blowing device, and the spout 14 is equipped with igniter.
In the present embodiment, deflector 121 is equipped with the arc pipe 12, the deflector 121 is conveyed along coal dust
Direction is set.The effect of the deflector 121 is to prevent that coal powder density is distributed when coal dust from entering spout 14 by arc pipe 12
It is uneven.
In the present invention, the end cross-sectional of the spout 14 can have diversified forms, such as shown in Fig. 2, the spout 14
End cross-sectional for C-shaped groove 141 shape；Such as shown in Fig. 5, the main body of the end cross-sectional of the spout 14 is rectangle
Structure, a middle side part of the rectangular configuration are inwardly recessed, and both ends are outwardly to form a C-shaped groove 141, and C-shaped is recessed
141 both ends of groove and the periphery of rectangular configuration form two C-shaped sharp portions 142；Such as in Fig. 6 shown in a, the end of the spout 14
The main body in section is circle, and the circle is equipped with two connected C-shaped grooves 141.In addition, as shown in b in Fig. 6, the C-shaped
Groove 141 is also provided with three.The end cross-sectional of the spout 14 can also be as shown in fig. 7, the end of the spout 14
The main body in portion section is two diamond shapes, and the both sides of diamond shape form the C-shaped groove 141.
In the present embodiment, as shown in figure 8, in order to further improve burn rate, the C-shaped in the above embodiment
The sharp end 143 of fork can be equipped with sharp portion 142, more ignition points are formed by sharp end 143, and then formed multiple
Flammule burning things which may cause a fire disaster, so as to make coal dust firing rapider.
Spout 14 described in the present embodiment is connect with the second direct current pipeline 13 by being weldingly connected.
In the present embodiment, surrounding air passage 3 is equipped with along the outer wall of the spout 14, the surrounding air passage 3 is with supplying
Wind apparatus is connected.The main function of the surrounding air passage 3 is when coal varitation, rises and plays a protective role to spout 14；
Air quantity can be supplemented into burner hearth by surrounding air passage 3 at the same time, further promote coal dust firing.
With reference to the above, structural principle of the invention is：When coal-powder boiler 2 works, coal-powder boiler 2 is by burner 1 to burner hearth
Coal dust is sprayed, coal dust can form C-shaped coal dust jet stream by spout 14, that is, it is in C to allow First air to form cross section after burner hearth is sprayed into
The coal dust jet stream of shape.Coal dust on the C-shaped coal dust jet stream cross section is near C-shaped sharp portion 142 is by C-shaped sharp portion 142
Because the flat thin shape of fluidic vectoring thrust has the advantage heated rapidly by high ambient temperatures flue gas (flame), First air coal dust is allowed to penetrate
Sub-fraction coal dust (5%-15%) ignition first in stream, forms stable flammule, and flammule can be to C-shaped sharp portion
142 both sides sprawling ignite coal dust formed it is two-sided catch fire, and then its power stream that ignites, so as to fulfill carrying for First air coal dust jet stream
Morning catches fire and stable ignition.In addition, coal dust jet stream has the function that coal dust localized concentrations in each flammule region in burner hearth, because
The coal powder density in flammule area improves, and is more conducive to catch fire.The reason for coal dust being allowed to be easy to catch fire in the present invention, also resides in the C
The relative surface area of 142 area unit volume of shape sharp portion is larger, and the convection current heat that ignites that the external world provides is larger, therefore is easy to
Fire.
With reference to Fig. 2-Fig. 4, in actual use, its C-shaped groove 141 is the incoming side met to burner hearth swirling eddy to the present invention
To further to utilize the convection current to fiery side to catch fire advantage.
The design of burner nozzle of the present invention is applicable not only to coal-powder boiler C-shaped DC burner, is also applied for using injection
The burner of other fuel such as the gas that mode is burnt.
In conclusion a kind of coal-powder boiler C-shaped DC burner of the present invention, can improve coal-powder boiler combustion characteristics, effectively improve
Peak modulation capacity and efficiency of combustion, promote coal-powder boiler low NOx drainage.So the present invention effectively overcome it is more of the prior art
Practical problem is so as to have very high utility value and using meaning.
The principle of the present invention and its effect is only illustrated in the above embodiment, not for the limitation present invention.This hair
It is bright to also have many aspects to be improved on the premise of without prejudice to overall thought, all can be for those skilled in the art
Without prejudice under the spirit and scope of the present invention, modifications and changes can be carried out to above-described embodiment.Therefore, technical field such as
Middle tool usually intellectual without departing from disclosed spirit and all equivalent modifications for being completed under technological thought or
Change, should be covered by the claim of the present invention.
Claims (3)
1. a kind of coal-powder boiler, it includes coal-powder boiler C-shaped DC burner, the burner（1）Installed in coal-powder boiler（2）On, its
It is characterized in that：The burner（1）Including sequentially connected first direct current pipeline（11）, arc pipe（12）, the second DC tube
Road（13）And spout（14）, the arc pipe（12）In be equipped with deflector（121）；The spout（14）Outer wall it is recessed inwardly
Into spout（14）End cross-sectional formed a C-shaped groove（141）Shape, the C-shaped groove（141）With spout outer wall phase
The part of connection forms the C-shaped sharp portion of protrusion（142）, and the jet shape of a C-shaped is formed, on coal dust jet stream cross section
Coal dust in C-shaped sharp portion（142）Pass through C-shaped sharp portion（142）Nearby because of the flat thin shape of fluidic vectoring thrust；Along the spout
（14）Outer wall be equipped with surrounding air passage（3）, the surrounding air passage（3）It is connected with air supply device；The spout（14）Place
C-shaped groove（141）It is the direction of flow met to burner hearth swirling eddy, in the spout（14）C-shaped groove location formed also
Former area.
A kind of 2. coal-powder boiler according to claim 1, it is characterised in that：The spout（14）The main body of end cross-sectional be
Rectangular configuration, a middle side part of the rectangular configuration are inwardly recessed, and both ends are outwardly to form a C-shaped groove（141）,
C-shaped groove（141）Both ends and the periphery of rectangular configuration form two C-shaped sharp portions（142）.
A kind of 3. coal-powder boiler according to claim 1, it is characterised in that：The spout（14）With the second direct current pipeline（13）
Connect by being weldingly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119857.XA CN104676585B (en) | 2015-03-18 | 2015-03-18 | A kind of coal-powder boiler C-shaped DC burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119857.XA CN104676585B (en) | 2015-03-18 | 2015-03-18 | A kind of coal-powder boiler C-shaped DC burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104676585A CN104676585A (en) | 2015-06-03 |
| CN104676585B true CN104676585B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510119857.XA Active CN104676585B (en) | 2015-03-18 | 2015-03-18 | A kind of coal-powder boiler C-shaped DC burner |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069071U (en) * | 1989-11-30 | 1991-01-09 | 张寿珍 | Burners for combustion of pulverulent coal |
| CN2747468Y (en) * | 2003-09-18 | 2005-12-21 | 郑平安 | Stable combustion type normal concentration dc coal powder burner |
| CN101124433A (en) * | 2004-03-08 | 2008-02-13 | 乔尔·瓦茨基 | Fuel injector for low NOx and enhanced flame stabilization |
| CN101965482A (en) * | 2008-03-07 | 2011-02-02 | 阿尔斯托姆科技有限公司 | Low nox nozzle tip for a pulverized solid fuel furnace |
| CN204513377U (en) * | 2015-03-18 | 2015-07-29 | 上海交通大学 | A kind of coal-powder boiler C shape DC burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120103237A1 (en) * | 2010-11-03 | 2012-05-03 | Ronny Jones | Tiltable multiple-staged coal burner in a horizontal arrangement |
-
2015
- 2015-03-18 CN CN201510119857.XA patent/CN104676585B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069071U (en) * | 1989-11-30 | 1991-01-09 | 张寿珍 | Burners for combustion of pulverulent coal |
| CN2747468Y (en) * | 2003-09-18 | 2005-12-21 | 郑平安 | Stable combustion type normal concentration dc coal powder burner |
| CN101124433A (en) * | 2004-03-08 | 2008-02-13 | 乔尔·瓦茨基 | Fuel injector for low NOx and enhanced flame stabilization |
| CN101965482A (en) * | 2008-03-07 | 2011-02-02 | 阿尔斯托姆科技有限公司 | Low nox nozzle tip for a pulverized solid fuel furnace |
| CN204513377U (en) * | 2015-03-18 | 2015-07-29 | 上海交通大学 | A kind of coal-powder boiler C shape DC burner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104676585A (en) | 2015-06-03 |
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