CN206504326U - Air channel in combustor nozzle coal dust - Google Patents
Air channel in combustor nozzle coal dust Download PDFInfo
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- CN206504326U CN206504326U CN201720162453.3U CN201720162453U CN206504326U CN 206504326 U CN206504326 U CN 206504326U CN 201720162453 U CN201720162453 U CN 201720162453U CN 206504326 U CN206504326 U CN 206504326U
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- air channel
- coal dust
- spin axis
- air
- swirl
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Abstract
Air channel in a kind of combustor nozzle coal dust, including swirl air duct and vortex air channel, the outer surface of outer spin axis is two cylindrical faces, the diameter of the cylindrical face of outward turning shaft rear end is less than the diameter of the cylindrical face of front end, space between outward turning shaft rear end and coal dust air channel inwall is the multiple helicla flutes of appearance EDS maps of the outer spin axis front end of swirl air duct, when outer spin axis front end and coal dust air channel inwall coordinate, the inner surface of coal dust air channel inwall is covered on helicla flute, now multiple helicla flutes constitute swirl air duct, as the helicla flute extends to nozzle direction.Compared to the prior art, the beneficial effects of the utility model：Air channel, the relative movement of swirl air duct cylinder are vortexed, not only changes the anglec of rotation for spraying air-flow, and changes the size in the exit for spraying air-flow, the shape jetted out flames can be preferably adjusted so that the random powder of coal dust layer can burn more abundant.
Description
Technical field
The utility model is related to air channel in a kind of combustor nozzle coal dust.
Background technology
In traditional cement production process, mostly using simple single air channel, double air-channel coal powder combustors, these kinds
How black burner duration and degree of heating be long, and efficiency of combustion is low；Develop the eighties, the nineties triple channel, four-way coal burner in succession afterwards,
But still have that air channel structure design is not sufficiently stable its air feed, flame profile temperature is difficult to control, it is impossible to real-time basis
The change of production environment and process conditions is adjusted, it is impossible to adapt to the problem of coal quality is uneven.Telescopic joint is mainly used in mending
The dilatation that pipeline is produced by temperature change is repaid, pipeline is also used for because of the length compensation of the needs such as mounting and adjusting, patent
CN101566342A discloses a kind of gas burner of furnace, has used wavy metal to stretch in the connection of burner and blower fan
Section, is in order to avoid nozzle is given a shock.
Utility model content
In order to solve the technical problem that existing burner nozzle is present, the utility model provides a kind of flame profile adjustment essence
Really, air channel in the sufficient burner nozzle coal dust of coal dust firing.
The technical solution of the utility model is：
Air channel in a kind of combustor nozzle coal dust, including swirl air duct and vortex air channel, the outer surface of outer spin axis is two
Cylindrical face, the diameter of the cylindrical face of outward turning shaft rear end is less than in the diameter of the cylindrical face of front end, outward turning shaft rear end and coal dust air channel
Space between wall is the multiple helicla flutes of appearance EDS maps of the outer spin axis front end of swirl air duct, when outer spin axis front end and coal dust air channel
When inwall coordinates, the inner surface of coal dust air channel inwall is covered on helicla flute, and now multiple helicla flutes constitute swirl air duct, with
The helicla flute extends to nozzle direction, and its area of section is gradually reduced；The rear end of spiral vortex device is column, and its side is fixed many
The individual helical raised be arrangeding in parallel, the outer space of spiral vortex device is vortex air channel, and the front end of spiral vortex device is preceding big
Small mesa-shaped, is vortexed air channel and is also classified into two parts afterwards：The helical duct that rear portion is formed for adjacent spirals between raised, it is anterior
For the passage of mesa-shaped.
The wind direction angle in the swirl air duct exit is 30-45 °.
The cross section of the helicla flute is that the deferent of circle where semicircle shape, the cross section of helicla flute is distributed in outer spin axis
On the outer surface of front end.
The front end of spiral vortex device is pre-large post-small round table-like, and vortex air channel front portion is round table-like passage.
The vortex air channel is identical with the direction of rotation of swirl air duct.
Compared to the prior art, the beneficial effects of the utility model：Air channel, the relative movement of swirl air duct cylinder are vortexed, no
Only change the anglec of rotation for spraying air-flow, and change the size in the exit for spraying air-flow, can preferably adjust spray
Go out the shape of flame so that the random powder of coal dust layer can burn more abundant.
Brief description of the drawings
Fig. 1 is the schematic diagram of burner.
Fig. 2 is Fig. 1 schematic top plan view.
Fig. 3 is the schematic diagram of burner.
Fig. 4 is Fig. 3 left view schematic diagram.
Fig. 5 is Fig. 3 diagrammatic cross-section.
Fig. 6 is the schematic diagram on the head of outer spin axis（A is stereogram, and b is front view, and c is top view, and d is profile）.
Fig. 7 is the schematic diagram of outer shaft wind groove（A is stereogram, and b is front view, and c is top view, and d is profile）.
Fig. 8 is the schematic diagram of middle spiral vortex device（A is stereogram, and b is profile, and c is front view）.
Fig. 9 is the enlarged diagram of Fig. 5 nozzle passages.
Embodiment
As shown in Fig. 1-2, a kind of burner includes the air-supply passage 89 and nozzle 80 of connection.
Air-supply passage 89 includes five passages, be followed successively by from the inside to surface fuel injection passage 91, interior air channel I 92, interior air channel II 93,
Coal dust air channel 94 and outer air duct 95.
Nozzle 80 includes five passages, is followed successively by from the inside to surface, jet 11, vortex air channel 12, swirl air duct 13, coal dust
Air channel 14, outer shaft stream air channel 15, five passages according to order from the inside to surface respectively with jet 91, interior air channel I 92, interior wind
Road II 93, coal dust air channel 94, outer air duct 95 are connected.
Nozzle 80 is followed successively by five layers of loop pipe from the inside to surface, is respectively：Spiral vortex device 20, outer spin axis 30, coal dust air channel
Inwall 40, outer shaft 50, outer wall 60.It is jet 11, the space between spiral vortex device 20, outer spin axis 30 in spiral vortex device 20
For vortex air channel 12, space between outer spin axis 30, coal dust air channel inwall 40 is swirl air duct 13, coal dust air channel inwall 40, outer
Space between axle 50 is coal dust air channel 14, and the space between outer shaft 50, outer wall 60 is outer shaft stream air channel 15.
Such as Fig. 8, Fig. 9, the rear end of spiral vortex device 20（Referring to reference 21）For column, its side is fixed multiple parallel
The helical raised 211 of setting, the front end of spiral vortex device 20（Referring to reference 22）To be pre-large post-small round table-like or
Prism-frustum-shaped.Accordingly, vortex air channel 12 is also classified into two parts：Rear portion is the spiral that is formed between adjacent spirals projection 211
Passage（Referring to reference 121）, front portion is circle（Rib）The passage of mesa-shaped.The benefit so designed is：Rear portion can be by advection wind
The mixing ratio of Whirl deposite tank, increase coal stratification of wind and air layer is changed to, increases the combusted proportion of coal stratification of wind；Front portion can pass through spiral vortex
Moved axially between device 20, outer spin axis 30, have adjusted the size of size at vortex ducting outlet（The external diameter inconvenience in exit, it is interior
Footpath can change with axial movement, thus have adjusted the size of size at vortex ducting outlet）, also with regard to air output can be adjusted.
Such as Fig. 6, Fig. 9, the outer surface of outer spin axis 30 is two cylindrical faces, and the diameter of the cylindrical face of rear end is less than the post of front end
The diameter in shape face, the space between the outer rear end of spin axis 30 and coal dust air channel inwall 40 connects interior air channel II 93.The outer front end of spin axis 30
The multiple helicla flutes of appearance EDS maps, when the outer front end of spin axis 30 and coal dust air channel inwall 40 coordinate, coal dust air channel inwall 40
Inner surface is covered on helicla flute, and now multiple helicla flutes constitute swirl air duct 13.The axis of the helicla flute is distributed in outer spin axis
On the outer surface of 30 front ends, as the helicla flute extends to nozzle direction, its area of section is gradually reduced.The section is shaped as
The deferent of circle is distributed on the outer surface of the outer front end of spin axis 30 where semicircle, the cross section of helicla flute.So design
Benefit is：The power that the helicla flute can inwardly be drawn in coal stratification of wind increase, extends the spray penetration of coal stratification of wind, adds coal stratification of wind
With the blending space of air；Meanwhile, when being moved axially between outer spin axis 30 and coal dust air channel inwall 40, the inwall in coal dust air channel
40 ends（It is exactly exit）The area of section of helicla flute follow adjustment, thus have adjusted the exit size of swirl air duct 13
Size and exit wind direction angle（It is exactly the tangential direction and the angle of the outer axial direction of spin axis 30 of the helicla flute）, have adjusted out
Air quantity.
In order to more preferably control flame, the wind direction angle in the exit of swirl air duct 13（Be exactly the helicla flute tangential direction with
The angle of the outer axial direction of spin axis 30）For 30-45 °.
Vortex air channel 12 collectively forms the interior crosswind in coal dust air channel 94 with swirl air duct 13, according to its adjustment, promotes in coal
Stratification of wind increase vortex, extends the mixing ratio of the spray penetration of coal stratification of wind, increase coal stratification of wind and air layer, increases the combustion of coal stratification of wind
Burning ratio.
Vortex air channel 12 is identical with the direction of rotation of swirl air duct 13, and the effect above is more preferable.
It is vortexed air channel 12 opposite with the direction of rotation of outer air duct 95, it is easier to tear up coal stratification of wind, combustion rate is higher.
Such as Fig. 7, Fig. 9, the outer surface of outer shaft 50 is two cylindrical faces, and the diameter of the cylindrical face of rear end is less than the column of front end
The diameter in face, the space between the rear end of outer shaft 50 and outer wall 60 connects outer air duct 95.The appearance EDS maps of the front end of outer shaft 50 are multiple
Taper groove 51, when the front end of outer shaft 50 and the cooperation of outer wall 60, the inner surface of outer wall 60 is covered on taper groove 51, now multiple cones
Shape groove 51 constitutes outer shaft stream air channel 15.As taper groove 51 extends to nozzle direction, its area of section is gradually reduced.Taper groove 51
Cross section be semicircle, the deferent of circle is the outer surface straight line for being distributed in the front end of outer shaft 50 where its cross section.This section
Face is shaped as semicircle.The benefit so designed is：The power that the helicla flute can inwardly be drawn in coal stratification of wind increase, extends coal
The spray penetration of stratification of wind, adds the blending space of coal stratification of wind and air；Meanwhile, moved axially between outer shaft 50 and outer wall 60
When, in the end of outer wall 60（It is exactly exit）The area of section of taper groove 51 follow adjustment, thus have adjusted outer air duct 95
The size of exit size, have adjusted air output.
In order to draw flame in, flame cover 69 is fixed in the end of outer wall 60.
As shown in Figure 1, Figure 2, interior air channel I 92, interior air channel II 93 and outer air duct 95 are respectively communicated with the first winding pipe 82, second entered
Wind branch pipe 83, the 3rd winding pipe 85, the first winding pipe 82, the second winding pipe 83, the 3rd winding pipe 85 all connect into
Wind house steward 87.So design an air inlet fan just.
First winding pipe 82, the second winding pipe 83, the 3rd winding pipe 85 are designed with valve, convenient regulation air intake
Amount.
In order to suspend in midair conveniently, suspension part 88 is fixed on air-supply passage 89.
Air-supply passage 89 and nozzle 80 are connected through a screw thread, and are specially：Air-supply passage 89 is also five-layer structure, and it is right respectively
Spiral vortex device 20, outer spin axis 30, coal dust air channel inwall 40, outer shaft 50, the five-layer structure of outer wall 60 of nozzle 80 are answered, each group
Counter structure junction is fixed for threaded connection.
For convenience between regulation spiral vortex device 20, outer spin axis 30, coal dust air channel inwall 40, outer shaft 50, outer wall 60
Axial distance, between the inside and outside wall in the interior air channel I 92 of air-supply passage 89, between the inside and outside wall in interior air channel II 93, outer air duct 95
Inside and outside wall between be respectively equipped with telescopic joint（Do not drawn in figure）, adjusted by the way that telescopic joint is convenient.
Its work was originally：
As existing five-duct burner operation principle, simply to the outlet chi of the interior outer air duct of coal dust layer at burner
The adjustment that becomes more meticulous has been done in very little and direction, and control flame more facilitates.
Other guide prior art.
Above-described is only preferred embodiment of the present utility model, it is noted that for those skilled in the art
For, under the premise of the utility model general idea is not departed from, some changes and improvements can also be made, these should also be considered as
Protection domain of the present utility model.
Claims (5)
1. air channel in a kind of combustor nozzle coal dust, including swirl air duct（13）With vortex air channel（12）, outer spin axis（31）It is outer
Surface is two cylindrical faces, it is characterised in that：Outer spin axis（31）The diameter of the cylindrical face of rear end is less than the straight of the cylindrical face of front end
Footpath, outer spin axis（31）Rear end and coal dust air channel inwall（40）Between space be swirl air duct（13）Outer spin axis（31）Outside front end
The multiple helicla flutes of surface distributed, when outer spin axis（31）Front end and coal dust air channel inwall（40）During cooperation, coal dust air channel inwall（40）
Inner surface cover on helicla flute, now multiple helicla flutes constitute swirl air ducts（13）, as the helicla flute is to nozzle direction
Extension, its area of section is gradually reduced；
Spiral vortex device（20）Rear end be column, multiple helical raiseds be arrangeding in parallel are fixed in its side（211）, spiral vortex
Flow device（20）Outer space for vortex air channel（12）, spiral vortex device（20）Front end be pre-large post-small mesa-shaped, be vortexed wind
Road（12）It is also classified into two parts：Rear portion is that adjacent spirals are raised（211）Between the helical duct that is formed, front portion is mesa-shaped
Passage.
2. air channel in combustor nozzle coal dust as claimed in claim 1, it is characterised in that：The swirl air duct（13）Exit
Wind direction angle be 30-45 °.
3. air channel in combustor nozzle coal dust as claimed in claim 1, it is characterised in that：The cross section of the helicla flute is half
The deferent of circle is distributed in outer spin axis where round shape, the cross section of helicla flute（31）On the outer surface of front end.
4. air channel in combustor nozzle coal dust as claimed in claim 1, it is characterised in that：Spiral vortex device（20）Front end be
Pre-large post-small is round table-like, is vortexed air channel（12）Front portion is round table-like passage.
5. air channel in combustor nozzle coal dust as claimed in claim 1, it is characterised in that：The vortex air channel（12）With eddy flow
Air channel（13）Direction of rotation it is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720162453.3U CN206504326U (en) | 2017-02-23 | 2017-02-23 | Air channel in combustor nozzle coal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720162453.3U CN206504326U (en) | 2017-02-23 | 2017-02-23 | Air channel in combustor nozzle coal dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206504326U true CN206504326U (en) | 2017-09-19 |
Family
ID=59840288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720162453.3U Active CN206504326U (en) | 2017-02-23 | 2017-02-23 | Air channel in combustor nozzle coal dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206504326U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613184A (en) * | 2018-06-14 | 2018-10-02 | 华能国际电力股份有限公司 | A kind of burner and working method of adjustable load |
| CN112628728A (en) * | 2020-12-22 | 2021-04-09 | 江苏羚羊机械有限公司 | Novel adjustable whirl of rotary kiln combustor device |
| CN113639561A (en) * | 2021-07-29 | 2021-11-12 | 中国恩菲工程技术有限公司 | Vortex nozzle and smelting furnace |
-
2017
- 2017-02-23 CN CN201720162453.3U patent/CN206504326U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613184A (en) * | 2018-06-14 | 2018-10-02 | 华能国际电力股份有限公司 | A kind of burner and working method of adjustable load |
| CN108613184B (en) * | 2018-06-14 | 2023-10-13 | 华能国际电力股份有限公司 | Combustor capable of adjusting load and working method |
| CN112628728A (en) * | 2020-12-22 | 2021-04-09 | 江苏羚羊机械有限公司 | Novel adjustable whirl of rotary kiln combustor device |
| CN113639561A (en) * | 2021-07-29 | 2021-11-12 | 中国恩菲工程技术有限公司 | Vortex nozzle and smelting furnace |
| CN113639561B (en) * | 2021-07-29 | 2022-10-14 | 中国恩菲工程技术有限公司 | Vortex nozzle and smelting furnace |
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