CN207455577U - Return flow burner - Google Patents
Return flow burner Download PDFInfo
- Publication number
- CN207455577U CN207455577U CN201721530452.6U CN201721530452U CN207455577U CN 207455577 U CN207455577 U CN 207455577U CN 201721530452 U CN201721530452 U CN 201721530452U CN 207455577 U CN207455577 U CN 207455577U
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- CN
- China
- Prior art keywords
- spout
- ring baffle
- secondary air
- return flow
- air channel
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Abstract
The utility model discloses a kind of return flow burners, belong to coal burner field, and key is：Including primary air piping, secondary air channel, fuel gun and burning torch, the spout of the primary air piping is located in secondary air channel, it is characterised in that：The fuel gun is located in primary air piping, and is extend out to from the spout of primary air piping in secondary air channel, and the spout of the fuel gun is located in secondary air channel；The burning torch spout also is located in secondary air channel, and close to fuel gun spout；The return flow burner further includes ring baffle, and the ring baffle is solidly set on fuel gun outer wall, and the outer diameter of ring baffle is more than the internal diameter of primary air piping, less than the internal diameter of secondary air channel.The utility model can directly reduce First air coal dust flow velocity, and the phenomenon that coal dust will not be caused to block, and reach the control length of flame and coal dust is made to burn in burner more fully effect.
Description
Technical field
The utility model belongs to boiler-burner field, specifically, is related to a kind of return flow burner.
Background technology
With the gradual application of the interior combustion system of present burner, more and more boilers start that internal combustion is selected to combust
Device.The characteristics of burner is that fuel energy is made to be lighted in advance in burner, is entered back into inside burner hearth, smaller for furnace cavity
Boiler for, due to conveying fuel (such as coal dust) First air flow velocity be very fast, the fuel lighted (such as coal dust) flame can be made
Boiler inner structure directly is washed away, if reducing the conveying speed of First air, then the fuel (such as coal dust) in First air is easily heavy
Product, blocking primary air pipeline.
Therefore now need one kind that can convey fuel, and can effectively control the burner of combustion flame length.
Utility model content
It, can be straight the purpose of this utility model is to provide a kind of return flow burner for solution more than technical problem
The phenomenon that connecing reduction First air coal dust flow velocity, and will not causing coal dust blockage reaches the control length of flame and is firing coal dust
Burning more fully effect in burner.
What the utility model aim was realized in：A kind of return flow burner, including primary air piping, secondary air channel, fuel
Rifle and burning torch, the spout of the primary air piping are located in secondary air channel, it is characterised in that：The fuel gun is located at primary air piping
In, and extend out to from the spout of primary air piping in secondary air channel, the spout of the fuel gun is located in secondary air channel；The burning torch
Spout also is located in secondary air channel, and close to fuel gun spout；The return flow burner further includes ring baffle, the annular
Baffle is solidly set on fuel gun outer wall, and the outer diameter of ring baffle is more than the internal diameter of primary air piping, less than the internal diameter of secondary air channel.
Using the above structure, an outer diameter is set with outside fuel gun and is more than primary air piping internal diameter less than secondary air channel internal diameter
Ring baffle, can effectively stop the whole First air coal dusts sprayed from primary air piping, be dropped rapidly by ring baffle
The speed of low First air coal dust.Secondary Air mixing in First air coal dust and secondary air channel after deceleration, is re-fed into burner
Combustion zone since the coal dust flow velocity in combustion zone is slower, can make coal dust more fully burn with prolonging burning time.
Further scheme is：Oxygen channel is further included, the ring baffle is hollow；The spray of the oxygen channel
It in mouthful insertion ring baffle, and is communicated with hollow inside ring baffle, the ring baffle is towards the one side of secondary air channel spout
It is provided with paranasal sinuses.
Using the above structure, using ring baffle hollow core point conveying oxygen, oxygen is sprayed near fuel gun spout,
The burner coking phenomenon that oily coal multifuel combustion is avoided to bring can be reduced, and oxygen can accelerate the burning velocity of coal dust, reduce coal dust
Ignition temperature, make coal dust firing more abundant.
Further scheme is：The ring baffle is flushed towards the one side of secondary air channel spout and fuel gun spout.
Further scheme is：There is gap between the described ring baffle and primary air piping spout.
Further scheme is：The spout one side of ring baffle towards primary air piping is provided with paranasal sinuses.
Further scheme is：The paranasal sinuses are distributed in a ring around ring baffle center.
Using the above structure, it can be distributed oxygen more uniform, coal dust and oxygen premix evenly, combustion even, fire
Flame direction is less likely to occur to deviate.
Further scheme is：The primary air piping, secondary air channel and fuel gun are located on same axial line.
Further scheme is：Circumference air hose is additionally provided with outside the secondary air channel.
Using the above structure, increase circumference air hose, the temperature of burner combustion section can be reduced, ensure the peace of burner
Entirely, and last be sent into burner hearth can be used as supplement air distribution.
Further scheme is：The ring baffle towards the one side of primary air piping spout be plane.
Further scheme is：The one side of the ring baffle towards primary air piping spout is inclined-plane or curved surface,
It is high by paracentral part, it is low by the part of proximal edge.
Using the above structure, the blowout that First air coal dust can be made more smooth, reduce because ring baffle and fuel gun it
Between angle generate coal dust packing phenomenon.
Advantageous effect：
A kind of return flow burner of the utility model does not change the powder feed rate of First air coal dust, but utilizes primary air piping
Ring baffle outside spout reduces First air coal dust flow velocity, and this mode will not cause coal dust in primary air piping transportational process to block up
Phenomenon is filled in, while First air coal dust flow velocity makes coal dust residence time in burner longer, burning is more by being refired after deceleration
Fully, combustion flame length can be effectively controlled, and oxygen is added near burner fuel rifle spout, also makes coal dust firing
More fully.
Description of the drawings
Fig. 1 is the structure diagram of the utility model embodiment one.
Fig. 2 is the ring baffle of the utility model embodiment one and the structure diagram of oxygen channel.
Fig. 3 is the ring baffle of the utility model embodiment two and the structure diagram of oxygen channel
Specific embodiment
With reference to embodiment and attached drawing, the utility model is described in further detail.
Embodiment one：As shown in Figure 1, 2：A kind of return flow burner, including primary air piping 2, secondary air channel 3,1 and of fuel gun
Burning torch 7, the spout of the primary air piping 2 are located in secondary air channel 3, and the fuel gun 1 is located in primary air piping 2, and from one
The spout of secondary air hose 2 is extend out in secondary air channel, and the spout of the fuel gun 1 is located in secondary air channel 3；7 spout of burning torch
It also is located in secondary air channel 3, and close to 1 spout of fuel gun；The return flow burner further includes ring baffle 5, the annular
Baffle 5 is sleeved on 1 outer wall of fuel gun, and the outer diameter of ring baffle 5 is more than the internal diameter of primary air piping 2, less than in secondary air channel 3
Footpath.
Wherein fuel gun can be the gun body that oil gun or air gun etc. provide fuel.Combustion gun is used as firing coal-dust, igniting
Rifle is used as lighting the fuel in combustion gun.What is conveyed in primary air piping is the mixture of First air coal dust, i.e. wind and coal dust.It is secondary
What is conveyed in air hose is wind.The outer diameter of ring baffle 5 needs the internal diameter more than primary air piping 2, less than the internal diameter of secondary air channel 3,
It just can effectively stop all First air coal dusts sprayed in primary air piping.The internal diameter of ring baffle 5 is close or equal to fuel
The outer diameter of rifle 1, ring baffle 5 can be hollow or solid in the present embodiment, and hollow structure diagram is shown in the figure.
Oxygen channel 6 is also shown in figure, the spout of the oxygen channel 6 is inserted into ring baffle 5, and and ring baffle
Hollow inside 5 communicates, and the spout one side of the ring baffle 5 towards secondary air channel 3 is provided with paranasal sinuses 5a.Therefore ring baffle tool
There are two effect, first, being to stop the First air coal dust sent out in primary air piping, reduce First air pulverized coal flow speed, second, being
Oxygen is provided, oxygen is made to mix more uniform with coal dust or fuel.
In the present embodiment attached drawing 1, the ring baffle 5 shown is flushed towards 3 spout one side of secondary air channel and fuel gun spout,
Except structure shown in figure, ring baffle 5 can also be longer than fuel gun spout towards 3 spout one side of secondary air channel or shorter than fire
Spray gun spout.The primary air piping 2, secondary air channel 3 and fuel gun 1 are located on same axial line, can so reduce coal dust pair
Pipe wear.Show that ring baffle 5 is fixed on 1 outer wall of a fuel gun in figure, it is close between ring baffle 5 and fuel gun 1
It is connected, is also shown in figure and be additionally provided with circumference air hose 4 outside the secondary air channel 3.1 spout of fuel gun is mounted with nozzle 1a.
As shown in Fig. 2, being provided with through hole 5b among ring baffle 5, when in use, fuel gun 1 can be passed through from by 5b.Go out
Oxygen hole 5a is distributed in a ring around the through hole 5b centers of ring baffle 5.Paranasal sinuses 5a can be arranged adjacent to 1 spout one of fuel gun
A bit.
Embodiment two：As shown in Figure 3：The structure of embodiment two is basic and embodiment one is identical, the difference is that annular
The structure of baffle, this will not be repeated here for other structures.
The spout one side of ring baffle 5 towards primary air piping 2 is inclined-plane, high by paracentral part, by proximal edge
Part it is low.This can also side be arranged to curved surface.
The ring baffle 5 is provided with paranasal sinuses towards the spout one side of primary air piping 2 and towards 3 spout one side of secondary air channel
5a.The paranasal sinuses 5a of the same side is to be distributed in a ring.
Finally it should be noted that foregoing description is only the preferred embodiment of the utility model, the common skill of this field
Art personnel on the premise of without prejudice to the utility model aims and claim, can make under the enlightenment of the utility model
Expression, such conversion are each fallen within the scope of protection of the utility model as multiple types.
Claims (10)
1. a kind of return flow burner, including primary air piping (2), secondary air channel (3), fuel gun (1) and burning torch (7), described one
The spout of secondary air hose (2) is located in secondary air channel (3), it is characterised in that：The fuel gun (1) is located in primary air piping (2), and
It is extend out to from the spout of primary air piping (2) in secondary air channel, the spout of the fuel gun (1) is located in secondary air channel (3)；The point
Firelock (7) spout also is located in secondary air channel (3), and close to fuel gun (1) spout；The return flow burner further includes annular
Baffle (5), the ring baffle (5) are solidly set on fuel gun (1) outer wall, and the outer diameter of ring baffle (5) is more than primary air piping (2)
Internal diameter, less than secondary air channel (3) internal diameter.
2. return flow burner is characterized in that according to claim 1：Further include oxygen channel (6), the ring baffle (5)
It is hollow；In the spout insertion ring baffle (5) of the oxygen channel (6), and the hollow phase internal with ring baffle (5)
Logical, the one side of the ring baffle (5) towards secondary air channel (3) spout is provided with paranasal sinuses (5a).
3. return flow burner is characterized in that according to claim 2：The ring baffle (5) is sprayed towards secondary air channel (3)
The one side and fuel gun (1) spout of mouth flush.
4. return flow burner is characterized in that according to Claims 2 or 3：The described ring baffle (5) and primary air piping (2)
There is gap between spout.
5. return flow burner is characterized in that according to claim 2：Ring baffle (5) is towards the spout of primary air piping (2)
One side is provided with paranasal sinuses (5a).
6. return flow burner is characterized in that according to claim 5：The paranasal sinuses (5a) surround ring baffle (5) center
It is distributed in a ring.
7. return flow burner is characterized in that according to claim 1：The primary air piping (2), secondary air channel (3) and fuel
Rifle (1) is located on same axial line.
8. return flow burner is characterized in that according to claim 1：Circumference air hose is additionally provided with outside the secondary air channel (3)
(4)。
9. return flow burner is characterized in that according to claim 1：The ring baffle (5) is sprayed towards primary air piping (2)
The one side of mouth is plane.
10. return flow burner is characterized in that according to claim 1：The ring baffle (5) is sprayed towards primary air piping (2)
The one side of mouth is inclined-plane or curved surface, leans on paracentral part high, low by the part of proximal edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721530452.6U CN207455577U (en) | 2017-11-16 | 2017-11-16 | Return flow burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721530452.6U CN207455577U (en) | 2017-11-16 | 2017-11-16 | Return flow burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207455577U true CN207455577U (en) | 2018-06-05 |
Family
ID=62279981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721530452.6U Active CN207455577U (en) | 2017-11-16 | 2017-11-16 | Return flow burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207455577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050199A (en) * | 2020-08-21 | 2020-12-08 | 北京巴布科克·威尔科克斯有限公司 | Burner and W flame boiler |
-
2017
- 2017-11-16 CN CN201721530452.6U patent/CN207455577U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050199A (en) * | 2020-08-21 | 2020-12-08 | 北京巴布科克·威尔科克斯有限公司 | Burner and W flame boiler |
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