CN106287690B - A kind of turbulent burner - Google Patents
A kind of turbulent burner Download PDFInfo
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- CN106287690B CN106287690B CN201610645015.2A CN201610645015A CN106287690B CN 106287690 B CN106287690 B CN 106287690B CN 201610645015 A CN201610645015 A CN 201610645015A CN 106287690 B CN106287690 B CN 106287690B
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- blade
- air
- circulation road
- bent blades
- cyclone
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of turbulent burner, including First air passage and the secondary air channel positioned at First air channels peripheral, it is characterised in that：The air outlet of the First air passage is provided with a flame holder, the flame holder includes cyclone, expands circulation road and adjusts the Pulverized Coal Concentration ring of swirl strength, the expansion circulation road is in outer expanding shape, the big section end of the expansion circulation road is connected with the Pulverized Coal Concentration ring, and the expansion circulation road small bore end is connected with the cyclone.Secondary wind swirl intensity bigger of the present invention, rigidity is stronger, and volume smoking gas ability is stronger；Recirculating zone size is can control by adjusting the length of blade on Pulverized Coal Concentration ring；Secondary Air with First air is later mixes, and the local coal powder density that improves can reduce NOx emission.
Description
Technical field
The invention belongs to the boiler-burner fields of coal dust burning, and in particular to a kind of turbulent burner.
Background technology
Turbulent burner is that outlet Secondary Air is rotated around burner axis, and outlet First air can be direct jet or rotation
A kind of circular burner of jet stream, its main distinction with DC burner be since rotation causes the low pressure of jet-core region,
So as to cause burner outlet near the reflux movement opposite with main steam flow direction, this causes turbulent burner to have easily
Fire, the characteristics of combustion intensity is big.But turbulent burner is there is also some problems simultaneously, since the burning of turbulent burner is mainly determined
Due to the structure and parameter of burner in itself, only burn unlike the exquisite overall effect of the arrangement of DC burner, therefore to single
The power of device needs stringent assurance, it is possible to create slagging and NOx generate more etc. ask caused by local heat load is excessively high
Topic.At present, new turbulent burner, which is put forth effort on, makes the timely, flameholding that catches fire, while reduces the NOx amount of its generation.
Denomination of invention：New-type Swirl Flow concentration coal burner（Publication number：104832918 A of CN, publication date：
2015.8.12）Combustion-supporting anthracitic igniting and burning, are played in a disguised form at coal dust firing initial stage by way of filling into high-quality bituminous coal
Increase the effect of coal dust volatile matter, ensure that low volatile pulverized coal can catch fire, stablize burning and efficient after-flame in time, at the same it is maximum
Limit reduces NOx discharge, preferably solves the problems, such as that turbulent burner exists.
It according to the principle for stablizing burning and low NOx, is improved in turbulent burner structure, design is a kind of to use fuel
Hierarchical approaches, volume inhale intensity bigger, the stronger turbulent burner of secondary air stiffness.
The content of the invention
Goal of the invention：The object of the present invention is to provide a kind of turbulent burner, make Secondary Air beyond totally rotation oneself
Body can also organize whirlpool to enhance the intensity of volume smoking gas.And pass through relatively low excess air coefficient and local high coal powder density
To reduce NOx emission.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
A kind of turbulent burner, it is special including First air passage and the secondary air channel positioned at First air channels peripheral
Sign is：The air outlet of the First air passage is provided with a flame holder, the flame holder include cyclone, expand circulation road and
The Pulverized Coal Concentration ring of swirl strength is adjusted, the expansion circulation road is in outer expanding shape, the expansion big section end of circulation road and the coal dust
Ring connection is concentrated, the expansion circulation road small bore end is connected with the cyclone.
The cyclone include sleeve, retainer ring and be arranged between sleeve and retainer ring for generating the of eddy flow
One blade, the sleeve are disposed coaxially on the outside of retainer ring；The Pulverized Coal Concentration ring includes rotating wheel, abutment sleeve and second
Blade, the abutment sleeve are connected with expanding circulation road, and the rotation wheel diameter is more than abutment sleeve, is coaxially mounted to abutment sleeve
Outside, second blade is bent blades, and the curved end of bent blades is located in the abutment sleeve, one end of the bent blades
It is connected on the rotating wheel, the eddy flow direction that the bending direction of the bent blades is generated with the cyclone is on the contrary, described curved
Automatic telescopic under the cyclonic action that the length that blade gos deep into the abutment sleeve is generated in the cyclone.
The bent blades leaf top is mounted on rotating wheel inner wall；First blade be prismatic blade, prismatic blade from blade root to
Leaf top gradually broadens, and each prismatic blade plane vertical with flame holder axis is into 30 ° of angles.
The bent blades are divided into straight section and curved segment, and plane is parallel to runner where the straight section blade.
The straight section side set slideway, the abutment sleeve be equipped with width be more than bent blades thickness, length with it is curved
The equal blade groove of width of blade, the blade groove is interior to be equipped with gliding mass, and the gliding mass is engaged with the slideway.
The slideway shape is rectangle.
The leaf top of the bent blades is connected to by a fixing axle on the inner wall of rotating wheel, and the fixing axle can phase with blade
To rotary motion.
The secondary air channel is internally provided with volute, and the volute is equipped with 90 ° of Y type entrances, is Pacific herring inside volute
Bone formula passage, the herringbone passage are 90 ° of herringbone grooves arrangement form by deflection angle.
The chevron shape is identical, and spacing is equal, and Y type entrances, the Y types entrance two-way direction are directed toward at the top of herringbone
It is parallel with herringbone both sides respectively.
Advantageous effect：Advantages of the present invention：First, the present invention is that itself is carried by the Secondary Air of the herringbone passage of spiral
The rotation steam flow of double whirlpools, the intensity bigger of volume smoking gas；Secondly, secondary air stiffness bigger can make Secondary Air and First air
Later mixing, while Pulverized Coal Concentration ring can improve the coal powder density of interior First air, can reduce NOx emission；Finally, one in flame holder
The swirl strength of secondary wind is adjustable, can control the size of recirculating zone.
Description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is the structure diagram 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 portions partial enlarged view of Fig. 3；
Fig. 5 is the herringbone access diagram of spiral of the present invention；
Fig. 6 is the herringbone passage not of the same race of the present invention and its outlet steam flow schematic shapes, and wherein a, c and e is three kinds
The not herringbone passage of structure, b, c and f are the corresponding double whirlpool schematic diagrames of herringbone passage of three kinds of not structures.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
With reference to the accompanying drawings 1, a kind of turbulent burner, including carrying the First air passage of flame holder 3 and leading to positioned at First air
The spiral secondary air channel of road periphery.Flame holder 3 is arranged on First air channel outlet, mounted on the periphery of atomizer 7, occupies
The half region of First air channel outlet.It will be by flame holder 3 and not being referred to as interior First air by the First air of flame holder 3
With outer First air.There are two effects for the flame holder 3 of the present invention：First, the adjustable interior First air of swirl strength can be generated, to control
The size of recirculating zone increases disturbance, stablizes burning；Second, interior First air is subjected to Pulverized Coal Concentration, it is dense to form local high coal dust
Degree.Spiral secondary air channel refers to be equipped with to generate the rotation Secondary Air for itself carrying double whirlpools in secondary air channel
The herringbone passage 2 of spiral.
Be specifically described the main composition part for introducing flame holder 3 below, flame holder 3 include cyclone 4, expand circulation road 6 with
And the Pulverized Coal Concentration ring 5 for adjusting swirl strength, cyclone 4 are cylinder type, outlet connects with expanding the small bore end of circulation road 6
It connects, expands circulation road 6 in outer expanding shape, effect is to provide space, big cross-sectional exit end and 5 phase of Pulverized Coal Concentration ring for jet stream recirculating zone
Even, Pulverized Coal Concentration ring 5 is cylinder type, and effect is that the eddy flow of First air in being adjusted while being concentrated to coal dust is strong
Degree.
Cyclone 4 include sleeve 8, retainer ring 10 and be arranged between sleeve and retainer ring for generating the ten of eddy flow
The first blade 9 of group, retainer ring 10 are mounted on the outside of atomizer 7, and sleeve 8 is disposed coaxially on the outside of retainer ring 10, in sleeve 8
Ten groups of prismatic blades 9 are circumferentially evenly arranged, due to different along the high direction coal powder density of leaf, required blade strength is different, because
This blade shape is arranged to gradually broaden from blade root to leaf top, and blade root and the retainer ring 10 of blade 9 are welded, and leaf top is welded with sleeve 8
It connects, each blade 9 plane vertical with 3 axis of flame holder is into 30 ° of angles during welding.Make interior First air steam flow with fixed 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 14 diameter of rotating wheel is more than abutment sleeve 16, is coaxially mounted to the outside of abutment sleeve 16, exists for changing blade
The length of interior First air passage.12 leaf top of blade is mounted on 14 inner wall of rotating wheel, and afterbody stretches into abutment sleeve 16.
Second blade 12 divides for straight section 17 and curved segment 18, and 17 place plane of straight section blade is set parallel to runner, side
Rectangle slideway 15, it is a Upper rectangular that rectangle slideway 15 is looked along section, the circular compound shape in lower part, 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 exports steam flow direction of rotation phase with cyclone 4
Instead, stopping the interior First air steam flow of rotation makes Pulverized Coal Concentration in curved segment 18.The leaf top of blade 12 is fixed by a fixing axle 11
On the inner wall of rotating wheel 14, fixing axle 11 can relative rotary motion with blade 12.
Abutment sleeve 16 is equipped with width and is more than 12 thickness of blade, and the length blade groove equal with 12 width of blade is convenient
Blade stretches into（Go out）.The short side center of blade groove is equipped with gliding mass 21, and gliding mass 21 is that a cylinder combines to be formed with a sphere
Complex, engaged with the rectangle slideway 16 of 12 side of blade, to fix position of the blade 12 on abutment sleeve 16, improve
The stability of structure.
When rotating rotating wheel 14, leaf top of the rotating wheel 14 with movable vane piece 12 along the circumferential direction moves, on abutment sleeve 16
Gliding mass 21 moved downward along the slideway 16 of blade 12, i.e., blade 12 stretch out abutment sleeve 16.At this time abutment sleeve 16 and turn
12 length of blade in the gap of driving wheel 14, and 12 length of blade in interior First air runner accordingly shortens, reduce to from
The obstruction of First air, swirl strength is adjusted with this in the rotation that cyclone comes out.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.
The herringbone secondary air channel structure of spiral is illustrated below, secondary air channel is internally provided with volute 1, i.e. spiral shell
Passage is revolved, for generating the Secondary Air totally rotated.Volute 1 is equipped with 90 ° of Y types entrances 19, contacts two strands of steam flows of entrance
Area increases, enhancing disturbance.Inside is herringbone passage, can make steam flow transverse direction spiral.Herringbone passage 2 is 90 ° by deflection angle
20 arrangement form of herringbone grooves, 20 shape of herringbone is identical, and spacing is equal, and Y types entrance 19 is directed toward at the top of herringbone 20, is had
Research shows that the structure mixing benefit of herringbone towards Y type entrances is more notable.19 two-way direction of Y types entrance respectively with herringbone
20 both sides are parallel, and the two strands of steam flows entered along Y types entrance 19 after herringbone passage 2 by forming oppositely oriented double whirlpools.When
When the both sides of herringbone 20 are unequal, the different double whirlpools of size, swirl strength can be generated, referring to Fig. 6.
A kind of steam flow of herringbone turbulent burner of spiral sprays process：First air passes through the effect of flame holder, high coal
The interior First air steam flow of powder concentration is gathered in high temperature recirculation zone, forms the high temperature for being conducive to flame stabilization, area with high mercury.And
The outer First air of direct current in the low-temperature space close to Secondary Air, not only supplemented with the burning of interior First air needed for air, but also isolate
Interior First air and Secondary Air.With double whirlpools spiral Secondary Air volume smoking gas ability it is stronger, it is more rigid, make Secondary Air with
The later mixing of First air, reduces the generation of NOx.
Claims (8)
1. a kind of turbulent burner, including First air passage and the secondary air channel positioned at First air channels peripheral, feature
It is：The air outlet of the First air passage is provided with a flame holder, which includes cyclone, expands circulation road and tune
The Pulverized Coal Concentration ring of whole swirl strength, for the expansion circulation road in outer expanding shape, the expansion big section end of circulation road and the coal dust are dense
Contracting ring connects, and the expansion circulation road small bore end is connected with the cyclone；The cyclone includes sleeve, retainer ring and sets
The first blade for being used to generate eddy flow between sleeve and retainer ring is put, the sleeve is disposed coaxially on the outside of retainer ring；
The Pulverized Coal Concentration ring includes rotating wheel, abutment sleeve and the second blade, and the abutment sleeve is connected with expanding circulation road, described turn
Driving wheel diameter is more than abutment sleeve, is coaxially mounted to the outside of abutment sleeve, and second blade is bent blades, bent blades it is curved
Curved end is located in the abutment sleeve, and one end of the bent blades is connected on the rotating wheel, the bending side of the bent blades
To the eddy flow direction generated with the cyclone on the contrary, the bent blades go deep into the length of the abutment sleeve in the cyclone
Automatic telescopic under the cyclonic action of generation.
2. turbulent burner according to claim 1, it is characterised in that：The bent blades leaf top is mounted on rotating wheel inner wall
On；First blade is prismatic blade, and prismatic blade gradually broadens from blade root to leaf top, and each prismatic blade is vertical with flame holder axis
Plane into 30 ° of angles.
3. turbulent burner according to claim 2, it is characterised in that：The bent blades are divided into straight section and curved segment, described
Plane is parallel to runner where straight section blade.
4. turbulent burner according to claim 3, it is characterised in that：Slideway is set in the straight section side, it is described fixed
Position sleeve is equipped with width and is more than bent blades thickness, and the length blade groove equal with bent blades width is equipped in the blade groove
Gliding mass, the gliding mass are engaged with the slideway.
5. turbulent burner according to claim 4, it is characterised in that：The slideway shape is rectangle.
6. turbulent burner according to claim 5, it is characterised in that：The leaf top of the bent blades is connected by a fixing axle
It is connected on the inner wall of rotating wheel, the fixing axle can relative rotary motion with blade.
7. according to any turbulent burners of claim 1-6, it is characterised in that：The secondary air channel is internally provided with spiral shell
Room is revolved, the volute is equipped with 90 ° of Y type entrances, is herringbone passage inside volute, which is by deflection angle
90 ° of herringbone grooves arrangement form.
8. turbulent burner according to claim 7, it is characterised in that：The chevron shape is identical, and spacing is equal, people
Y type entrances are directed toward at the top of font, the Y types 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 |
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| Publication Number | Publication Date |
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| CN106287690A CN106287690A (en) | 2017-01-04 |
| CN106287690B true CN106287690B (en) | 2018-05-25 |
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| CN201610645015.2A Active CN106287690B (en) | 2016-08-08 | 2016-08-08 | A kind of turbulent burner |
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Families Citing this family (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 |
| CN115949970B (en) * | 2023-01-05 | 2023-08-22 | 中国航空发动机研究院 | Cyclone blade and cyclone |
Family Cites Families (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 |
| CN102062396B (en) * | 2010-10-13 | 2013-01-02 | 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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