CN106287690A - A kind of turbulent burner - Google Patents
A kind of turbulent burner Download PDFInfo
- Publication number
- CN106287690A CN106287690A CN201610645015.2A CN201610645015A CN106287690A CN 106287690 A CN106287690 A CN 106287690A CN 201610645015 A CN201610645015 A CN 201610645015A CN 106287690 A CN106287690 A CN 106287690A
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- China
- Prior art keywords
- blade
- turbulent burner
- air
- circulation road
- bent blades
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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
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
Abstract
The invention discloses a kind of turbulent burner, including First air passage and the secondary air channel that is positioned at First air channels peripheral, it is characterized in that: the air outlet at described First air passage is provided with a flame holder, this flame holder includes cyclone, expands circulation road and adjust the Pulverized Coal Concentration ring of swirl strength, described expansion circulation road is outer expanding shape, described expansion circulation road heavy in section end is connected with described Pulverized Coal Concentration ring, and described expansion circulation road small bore end is connected with described cyclone.Secondary wind swirl intensity of the present invention is bigger, and rigidity is higher, and volume smoking gas ability is higher；Recirculating zone size can be controlled by adjusting the length of blade on Pulverized Coal Concentration ring；Secondary wind is later with First air to be mixed, and local is improved coal powder density and can be reduced NOx emission.
Description
Technical field
The invention belongs to the boiler-burner field of coal dust burning, be specifically related to a kind of turbulent burner.
Background technology
Turbulent burner is that outlet secondary wind rotates around burner axis, and outlet First air can be direct jet or rotation
A kind of circular burner of jet, it is owing to rotating the low pressure causing jet-core region with the main distinction of DC burner,
Thus reflux movement in opposite direction with main steam flow near the burner outlet caused, this makes turbulent burner have easily
Fire, the feature that combustion intensity is big.But turbulent burner there is also some problems, owing to the burning of turbulent burner is mainly determined simultaneously
Due to the structure and parameter of burner itself, unlike arranging of DC burner is particular about overall effect, therefore to single only burning
The power of device needs strict assurance, it is possible to create and the slagging scorification that cause and NOx too high due to local heat load generate many etc. asking
Topic.At present, novel turbulent burner is put forth effort on to be made to catch fire in time, flameholding, reduces its NOx amount produced simultaneously.
Denomination of invention: New-type Swirl Flow concentration coal burner (publication number: CN 104832918 A, publication date:
2015.8.12) combustion-supporting anthracitic igniting and burning by the way of filling into high-quality bituminous coal, played in a disguised form at the coal dust firing initial stage
Increase the effect of coal dust volatile matter, it is ensured that low volatile pulverized coal can catch fire in time, stablize burning and efficient after-flame, the most maximum
Limit reduces NOx discharge, preferably solves the problem that turbulent burner exists.
According to stable burning and the principle of low NOx, improving in turbulent burner structure, design one uses fuel
Hierarchical approaches, volume suction intensity is bigger, the turbulent burner that secondary air stiffness is higher.
Summary of the invention
Goal of the invention: it is an object of the invention to provide a kind of turbulent burner, make secondary wind in addition to overall rotation from
Body can also organize whirlpool to strengthen the intensity of volume smoking gas.And by the high coal powder density of relatively low excess air coefficient and local
To reduce NOx emission.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of turbulent burner, including First air passage and the secondary air channel that is positioned at First air channels peripheral, its feature exists
In: the air outlet at described First air passage is provided with a flame holder, and this flame holder includes cyclone, expands circulation road and adjustment
The Pulverized Coal Concentration ring of swirl strength, described expansion circulation road is outer expanding shape, described expansion circulation road heavy in section end and described Pulverized Coal Concentration
Ring connects, and described expansion circulation road small bore end is connected with described cyclone.
Described cyclone include sleeve, retainer ring and be arranged between sleeve and retainer ring for producing the of eddy flow
One blade, described sleeve is disposed coaxially on the outside of retainer ring；Described Pulverized Coal Concentration ring includes rotating wheel, abutment sleeve and second
Blade, described abutment sleeve is connected with expanding circulation road, and described rotation wheel diameter is more than abutment sleeve, is coaxially mounted to abutment sleeve
Outside, described second blade is bent blades, and the curved end of bent blades is positioned at described abutment sleeve, one end of described bent blades
Being connected to described rotation on wheel, the eddy flow that the bending direction of described bent blades produces with described cyclone is in opposite direction, described curved
Blade gos deep into the length of described abutment sleeve automatic telescopic under the cyclonic action that described cyclone produces.
Described bent blades leaf top is arranged on rotation wheel inwall；Described first blade is prismatic blade, prismatic blade from blade root to
Leaf top gradually broadens, and the plane that each prismatic blade is vertical with flame holder axis becomes 30 ° of angles.
Described bent blades is divided into straight section and curved segment, described straight section blade place plane to be parallel to runner.
Arranging slideway in described straight section side, described abutment sleeve is provided with width and is more than bent blades thickness, and length is with curved
The blade groove that width of blade is equal, is provided with gliding mass in described blade groove, described gliding mass engages with described slideway.
Described slideway is shaped as rectangle.
The leaf top of described bent blades is connected to by a fixing axle rotate on the inwall of wheel, and described fixing axle can phase with blade
To rotary motion.
Being provided with volute inside described secondary air channel, described volute is provided with 90 ° of Y type entrances, and volute is internal is Pacific herring
Bone formula passage, this herringbone passage is formed by the herringbone grooves arrangement that deflection angle is 90 °.
Described chevron shape is identical, and spacing is equal, and Y type entrance, described Y type entrance two-way direction are pointed in herringbone top
Parallel with herringbone both sides respectively.
Beneficial effect: advantages of the present invention: first, the present invention by the secondary wind of the herringbone passage of spiral be self with
The rotation steam flow of double whirlpools, the intensity of its volume smoking gas is bigger；Secondly, secondary air stiffness is bigger, can make secondary wind and First air
Later mixing, Pulverized Coal Concentration ring can improve the coal powder density of interior First air simultaneously, it is possible to decrease NOx emission；Finally, in flame holder one
The swirl strength of secondary wind is adjustable, can control the size of recirculating zone.
Accompanying drawing explanation
Fig. 1 is the front view of the present invention；
Fig. 2 is the structural representation of flame holder of the present invention；
Fig. 3 is the cross section view of Pulverized Coal Concentration ring of the present invention；
Fig. 4 is the A portion partial enlarged drawing of Fig. 3；
Fig. 5 is the herringbone access diagram of spiral of the present invention；
Fig. 6 is the most of the same race herringbone passage and the outlet steam flow schematic shapes thereof of the present invention, and wherein a, c and e are three kinds and do not tie
The herringbone passage of structure, b, c and f are double whirlpool schematic diagrams that the herringbone passage of three kinds of not structures is corresponding.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
With reference to the accompanying drawings 1, a kind of turbulent burner, including with the First air passage of flame holder 3 and be positioned at First air and lead to
The spiral secondary air channel that road is peripheral.Flame holder 3 is arranged on First air channel outlet, is arranged on the periphery of atomizer 7, occupies
The half region of First air channel outlet.By flame holder 3 and will not be called interior First air by the First air of flame holder 3
With outer First air.The flame holder 3 of the present invention has two effects: first, can produce the adjustable interior First air of swirl strength, control
The size of recirculating zone, increases disturbance, stable burning；Second, interior First air is carried out Pulverized Coal Concentration, forms the high coal dust in local dense
Degree.Spiral secondary air channel is provided with in referring to secondary air channel for producing self rotation secondary wind with double whirlpools
The herringbone passage of spiral 2.
Illustrate in detail below and introduce the main composition parts of flame holder 3, flame holder 3 include cyclone 4, expand circulation road 6 with
And for adjusting the Pulverized Coal Concentration ring 5 of swirl strength, cyclone 4 is cylinder type, exports and expand the small bore end of circulation road 6 even
Connecing, expansion circulation road 6 is in outer expanding shape, and its effect is for offer space, jet recirculating zone, the heavy in section port of export and Pulverized Coal Concentration ring 5 phase
Even, Pulverized Coal Concentration ring 5 is cylinder type, and its effect is that in regulation, the eddy flow of First air is strong while concentrating coal dust
Degree.
Cyclone 4 include sleeve 8, retainer ring 10 and be arranged between sleeve and retainer ring for producing the ten of eddy flow
Organizing the first blade 9, retainer ring 10 is arranged on the outside of atomizer 7, and sleeve 8 is disposed coaxially on the outside of retainer ring 10, in sleeve 8
Circumferentially being evenly arranged ten groups of prismatic blades 9, due to different along leaf height direction coal powder density, required blade strength is different, because of
This blade shape is set to gradually broaden to leaf top from blade root, and the blade root of blade 9 is welded with retainer ring 10, and leaf top is welded with sleeve 8
Connecing, the plane that during welding, each blade 9 is vertical with flame holder 3 axis becomes 30 ° of angles.Make interior First air steam flow with fixing big rotation
Intensity of flow rotational flow.
Pulverized Coal Concentration ring 5 includes rotating wheel 14, abutment sleeve 16 and eight group of second blade 12, and abutment sleeve 16 circulates with expanding
Road 6 connects, and rotates wheel 14 diameters and is more than abutment sleeve 16, is coaxially mounted to the outside of abutment sleeve 16, is used for changing blade and exists
The length of interior First air passage.Blade 12 leaf top is arranged on rotation wheel 14 inwalls, and afterbody stretches into abutment sleeve 16.
Second blade 12 is divided into straight section 17 and curved segment 18, straight section blade 17 place plane to be parallel to runner, and its side is arranged
Rectangle slideway 15, it is a Upper rectangular that rectangle slideway 15 is looked along cross section, and the compound shape that bottom is circular, to engage positioning sleeve
Gliding mass 21 on cylinder 16.Curved segment 18 is arranged in the afterbody of straight section 17, and bending direction and cyclone 4 export steam flow direction of rotation phase
Instead, stop that the interior First air steam flow rotated makes Pulverized Coal Concentration in curved segment 18.The leaf top of blade 12 is fixed by a fixing axle 11
On the inwall rotating wheel 14, fixing axle 11 can relative rotary motion with blade 12.
Abutment sleeve 16 is provided with width more than blade 12 thickness, the blade groove that length is equal with blade 12 width, convenience
Blade stretches into (going out).The minor face center of blade groove is provided with gliding mass 21, and gliding mass 21 is a cylinder and a spheroid combination formation
Complex, engage with the rectangle slideway 16 of blade 12 side, with the fixing blade 12 position on abutment sleeve 16, improve
The stability of structure.
When rotating wheel 14, along the circumferential direction move, on abutment sleeve 16 in the leaf top rotating wheel 14 band moving vanes 12
Gliding mass 21 move downward along the slideway 16 of blade 12, i.e. blade 12 stretches out abutment sleeve 16.Now abutment sleeve 16 and turning
Blade 12 length in the gap of driving wheel 14, and blade 12 length in interior First air runner shortens accordingly, reduce to from
The cyclone obstruction rotating interior First air out, regulates swirl strength with this.And blade 12 makes coal to the stop of coal dust steam flow
Powder is concentrated in blade curved segment 18, improves local coal powder density.
Secondary air channel structure herringbone to spiral is illustrated below, is provided with volute 1, i.e. spiral shell inside secondary air channel
Rotation passage, for producing the secondary wind of overall rotation.Volute 1 is provided with 90 ° of Y type entrances 19, makes two bursts of steam flow contacts of entrance
Area increases, and strengthens disturbance.Inside is herringbone passage, can make the horizontal spiral of steam flow.Herringbone passage 2 is 90 ° by deflection angle
Herringbone grooves 20 arrangement formed, herringbone 20 shape is identical, and spacing is equal, herringbone 20 top point to Y type entrance 19, have
Research shows, herringbone is more notable towards the structure mixing benefit of Y type entrance.Y type entrance 19 two-way direction respectively with herringbone
20 both sides are parallel, and the two strands of steam flows entered along Y type entrance 19 form oppositely oriented double whirlpools by after herringbone passage 2.When
When the both sides of herringbone 20 are unequal, double whirlpools that size, swirl strength are different can be produced, see Fig. 6.
The steam flow ejection process of the herringbone turbulent burner of a kind of spiral is: the First air effect by flame holder, high coal
The interior First air steam flow of powder concentration is gathered in high temperature recirculation zone, defines the high temperature of beneficially flame stabilization, area with high mercury.And
The outer First air of direct current, at the low-temperature space near secondary wind, not only supplements the air needed for the burning of interior First air, and isolates
Interior First air and secondary wind.The ability rolling up smoking gas with the spiral secondary wind of double whirlpools is higher, and rigidity is bigger, make secondary wind with
The later mixing of First air, decreases the generation of NOx.
Claims (9)
1. a turbulent burner, including First air passage and the secondary air channel that is positioned at First air channels peripheral, its feature
Being: the air outlet at described First air passage is provided with a flame holder, this flame holder includes cyclone, expands circulation road and tune
The Pulverized Coal Concentration ring of whole swirl strength, described expansion circulation road is outer expanding shape, and described expansion circulation road heavy in section end is dense with described coal dust
Contracting ring connects, and described expansion circulation road small bore end is connected with described cyclone.
Turbulent burner the most according to claim 1, it is characterised in that: described cyclone include sleeve, retainer ring and
The first blade for producing eddy flow being arranged between sleeve and retainer ring, described sleeve is disposed coaxially on outside retainer ring
Side；Described Pulverized Coal Concentration ring includes rotating wheel, abutment sleeve and the second blade, and described abutment sleeve is connected with expanding circulation road, institute
Stating rotation wheel diameter and be more than abutment sleeve, be coaxially mounted to the outside of abutment sleeve, described second blade is bent blades, bent blades
Curved end be positioned at described abutment sleeve, one end of described bent blades is connected to described rotate on wheel, described bent blades curved
The eddy flow that Qu Fangxiang produces with described cyclone is in opposite direction, and described bent blades gos deep into the length of described abutment sleeve in described rotation
Automatic telescopic under the cyclonic action that stream device produces.
Turbulent burner the most according to claim 2, it is characterised in that: described bent blades leaf top is arranged on rotation wheel inwall
On；Described first blade is prismatic blade, and prismatic blade gradually broadens to leaf top from blade root, and each prismatic blade is vertical with flame holder axis
Plane become 30 ° of angles.
Turbulent burner the most according to claim 3, it is characterised in that: described bent blades is divided into straight section and curved segment, described
Straight section blade place plane is parallel to runner.
Turbulent burner the most according to claim 4, it is characterised in that: in described straight section side, slideway is set, described fixed
Position sleeve is provided with width and is more than bent blades thickness, the blade groove that length is equal with bent blades width, is provided with in described blade groove
Gliding mass, described gliding mass engages with described slideway.
Turbulent burner the most according to claim 5, it is characterised in that: described slideway is shaped as rectangle.
Turbulent burner the most according to claim 6, it is characterised in that: the leaf top of described bent blades is by a fixing axle even
Being connected on the inwall rotating wheel, described fixing axle can relative rotary motion with blade.
8. according to the arbitrary described turbulent burner of claim 1-7, it is characterised in that: it is provided with spiral shell inside described secondary air channel
Rotation room, described volute is provided with 90 ° of Y type entrances, and volute is internal is herringbone passage, and this herringbone passage by deflection angle is
The herringbone grooves arrangement of 90 ° is formed.
Turbulent burner the most according to claim 8, it is characterised in that: described chevron shape is identical, and spacing is equal, people
Y type entrance is pointed at font top, and described Y type entrance two-way direction is parallel with herringbone both sides respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645015.2A CN106287690B (en) | 2016-08-08 | 2016-08-08 | A kind of turbulent burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645015.2A CN106287690B (en) | 2016-08-08 | 2016-08-08 | A kind of turbulent burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106287690A true CN106287690A (en) | 2017-01-04 |
| CN106287690B CN106287690B (en) | 2018-05-25 |
Family
ID=57666938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610645015.2A Active CN106287690B (en) | 2016-08-08 | 2016-08-08 | A kind of turbulent burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106287690B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355781A (en) * | 2017-08-30 | 2017-11-17 | 山西煜能科技开发有限公司 | A kind of methanol burner flame vortex device |
| CN110397911A (en) * | 2019-07-26 | 2019-11-01 | 华能国际电力股份有限公司南通电厂 | Numerical control air-coal ratio low-NOx and low-CO efficient hedging rotational flow combustion control system |
| CN114646076A (en) * | 2022-03-18 | 2022-06-21 | 中国航空发动机研究院 | Adjustable cyclone assembly and multistage cyclone |
| CN115949970A (en) * | 2023-01-05 | 2023-04-11 | 中国航空发动机研究院 | Swirler vane and swirler |
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|---|---|---|---|---|
| US5535686A (en) * | 1992-03-25 | 1996-07-16 | Chung; Landy | Burner for tangentially fired boiler |
| US5762007A (en) * | 1996-12-23 | 1998-06-09 | Vatsky; Joel | Fuel injector for use in a furnace |
| CN2296451Y (en) * | 1997-04-12 | 1998-11-04 | 王永刚 | Mixed coal power combustor |
| CN2699136Y (en) * | 2003-09-18 | 2005-05-11 | 郑平安 | Vortex pulverized coal burner |
| CN102062396A (en) * | 2010-10-13 | 2011-05-18 | 西安交通大学 | Composite concentration triple-wind-regulating low-NOx cyclone pulverized-coal burner |
| CN203586284U (en) * | 2013-11-18 | 2014-05-07 | 华中科技大学 | Axial blade type cyclone with direct flow holes |
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2016
- 2016-08-08 CN CN201610645015.2A patent/CN106287690B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535686A (en) * | 1992-03-25 | 1996-07-16 | Chung; Landy | Burner for tangentially fired boiler |
| US5762007A (en) * | 1996-12-23 | 1998-06-09 | Vatsky; Joel | Fuel injector for use in a furnace |
| CN2296451Y (en) * | 1997-04-12 | 1998-11-04 | 王永刚 | Mixed coal power combustor |
| CN2699136Y (en) * | 2003-09-18 | 2005-05-11 | 郑平安 | Vortex pulverized coal burner |
| CN102062396A (en) * | 2010-10-13 | 2011-05-18 | 西安交通大学 | Composite concentration triple-wind-regulating low-NOx cyclone pulverized-coal burner |
| CN203586284U (en) * | 2013-11-18 | 2014-05-07 | 华中科技大学 | Axial blade type cyclone with direct flow holes |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355781A (en) * | 2017-08-30 | 2017-11-17 | 山西煜能科技开发有限公司 | A kind of methanol burner flame vortex device |
| CN110397911A (en) * | 2019-07-26 | 2019-11-01 | 华能国际电力股份有限公司南通电厂 | Numerical control air-coal ratio low-NOx and low-CO efficient hedging rotational flow combustion control system |
| CN114646076A (en) * | 2022-03-18 | 2022-06-21 | 中国航空发动机研究院 | Adjustable cyclone assembly and multistage cyclone |
| CN115949970A (en) * | 2023-01-05 | 2023-04-11 | 中国航空发动机研究院 | Swirler vane and swirler |
| CN115949970B (en) * | 2023-01-05 | 2023-08-22 | 中国航空发动机研究院 | Cyclone blade and cyclone |
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| Publication number | Publication date |
|---|---|
| CN106287690B (en) | 2018-05-25 |
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