CN206274163U - Coal burner - Google Patents
Coal burner Download PDFInfo
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- CN206274163U CN206274163U CN201621383201.5U CN201621383201U CN206274163U CN 206274163 U CN206274163 U CN 206274163U CN 201621383201 U CN201621383201 U CN 201621383201U CN 206274163 U CN206274163 U CN 206274163U
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- air
- pipe
- coal burner
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Abstract
The utility model is related to energy field, disclose a kind of coal burner, the coal burner includes primary air piping (10) and the secondary air channel (20) being socketed on the primary air piping (10), it is characterized in that, the nozzle of the primary air piping (10) forms oriented axially projecting multiple flange parts (30), the flange part (30) is with rectangular top (31) and the bottom (32) being arranged on the spout side face, the width of the bottom (32) is more than the rectangular top (31), and the top surface of the rectangular top (31) is transitted to arcs of recesses, so that coal dust is difficult to be flowed back to burner nozzle area, protect burner, avoid the generation of the problems such as burner overtemperature and coking.
Description
Technical field
The utility model is related to energy field, in particular it relates to a kind of coal burner.
Background technology
Thermal power generation heat energy produced when being using combustible combustions such as coals is converted into the generation mode of electric energy.And China
Rich coal resources, thermal power generation accounts for more than the 80% of China's power industry generated energy, therefore to the dirt of coal-fired power station boiler
Dye thing discharge is controlled, and becomes problem demanding prompt solution.
As a rule, for making coal fully burn, the purpose of pollutant emission is reduced as far as possible, coal-fired power station boiler can basis
The difference of design coal, and type of furnace, structure and burner to boiler etc. is selected.But, with domestic electricity coal supply
The reasons such as the marketization, the change of coal-fired manufacturing process so that most power plant are difficult to use design coal always.
And along with the use of a large amount of non dippers, coal-fired power station boiler easily produces following problems：
(1) when the non dipper that boiler is used is low volatile coal, it is susceptible to coal dust after-flame degree and is deteriorated and fires
Burn unstable；
(2) when the non dipper that boiler is used is low ash smelting point coal, the heating surface in burner region and screen area is easy
Occur Serious Slagging, and then cause overtemperature of tube wall, exhaust gas temperature raise, cause boiler have to drop parameter run and cause boiler
Efficiency reduction etc.；
(3) when the non dipper that boiler is used has different combustion characteristics and pollutant emission characteristic difference, hold
Easily cause NOx control effects undesirable.
If uncontrollable be effectively controlled to above-mentioned these phenomenons, the safety of generating set can severely impacted just
Normal operation.
Coal burner is to ensure that coal burning air can be sufficiently mixed into burner hearth and with coal dust with certain speed,
One of crucial combustion apparatus of burning is caught fire and stablized in time, therefore, even if when using non dipper, how to make coal dust
Burner meets low NOx environmental requirements while ensure that noncoking safe operation, becomes urgently to be resolved hurrily in this area
Technical problem.
Although prior art has by increasing air classification to reduce the growing amount of NOx, burner cannot be still solved
The problems such as spout coking.And coal burner produces coke heavy when actually used, it is likely that change Combustion Flow Field, shadow in stove
Ring the normal operation of the safety of combustion efficiency or even generating set.
Utility model content
The purpose of this utility model is to provide a kind of coal burner, and the coal burner can solve the problem that burner nozzle knot
Burnt the problems such as, it is ensured that Combustion Flow Field in stove.
To achieve these goals, the utility model provides a kind of coal burner, including primary air piping and is socketed in institute
State the secondary air channel on primary air piping, it is characterised in that the nozzle of the primary air piping forms oriented axially projecting multiple
Flange part, the flange part has rectangular top and the bottom being arranged on the spout side face, and the width of the bottom is more than
The rectangular top, and the top surface of the rectangular top is transitted to arcs of recesses.
Preferably, the multiple flange part is 8-10 for being evenly distributed.
Preferably, the flange part has the first surface concordant with the spout-top face of the primary air piping, and this first
The surface area sum on surface is the 10-20% of the primary air piping circulation area.
Preferably, the thickness of the flange part is gradually reduced from the spout side face to the top surface of the rectangular top.
Preferably, the shape of the flange part meets：Curve 1：(X-2a)2+(Y-1a)2=1 { X ∈ (1a, 2a)；Y∈
(0a, 1a) }；Curve 2：Y=1 { Y ∈ (- 1a, 1a) }；Curve 3：(X+2a)2+(Y-1a)2=1 { X ∈ (- 1a, -2a)；Y ∈ (0a,
1a) }, wherein, constant a be arithmetic number.
Preferably, the secondary air channel is included in the non-swirl secondary air that the primary air piping periphery is sequentially arranged from inside to outside
Pipe, inner second air pipe and outer second air pipe.
Preferably, the nozzle of the direct-current secondary airduct is formed with water conservancy diversion governor motion.
Preferably, the air inlet of the direct-current secondary airduct, inner second air pipe and outer second air pipe is provided with wind rotation
Stream governor motion, the wind eddy flow governor motion adjusts the swirl strength and/or air quantity of corresponding each secondary air channel respectively.
Preferably, the inner second air pipe has the air inlet of inner second air pipe first and the air inlet of inner second air pipe second,
The air inlet of inner second air pipe first and the air inlet of inner second air pipe second are respectively arranged with inner second air door adjusting rod and interior
Secondary Air swirl vane adjusting rod.
Preferably, the air inlet of inner second air pipe first and the air inlet of inner second air pipe second pass through platform shape Guan Lian
The spout of the inner second air pipe is passed to, cyclone is provided with described shape pipe.
By above-mentioned technical proposal, because the nozzle of primary air piping forms oriented axially projecting multiple flange parts, should
Flange part has disturbs small, big to the disturbance of First air root shape to First air center flow resistance, and the rectangular top is by recessed
, to spout side face, so as to only produce microvariations to wind when First air sprays spout, and this disturbance is in First air for arc-shaped transition
After spraying spout certain distance, become large disturbances.So as to strengthen the mixing intensity of the Secondary Air of late combustion one, promote
The after-flame degree of coal dust.Simultaneously because the effect of damming of flange part, improves primary air velocity to a certain extent so that coal dust is not
Easily flowed back to burner nozzle area, protect burner, it is to avoid generation the problems such as burner overtemperature and coking.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is further understood to of the present utility model for providing, and constitutes a part for specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the top view of coal burner described in the utility model.
Fig. 2 is the structural representation of coal burner described in the utility model.
Fig. 3 is the spout structure schematic diagram of coal burner described in the utility model.
Description of reference numerals
10 primary air pipings
The direct-current secondary airduct of 20 secondary air channel 21
The outer second air pipe of 22 inner second air pipe 23
The outer second air pipe air inlet of 24 water conservancy diversion governor motion 25
The second air inlet of inner second air pipe of 26 the first air inlet of inner second air pipe 27
The 28 shape pipes of direct current air inlet 29
The rectangular top of 30 flange part 31
The first surface of 32 bottom 33
The inner second air of 41 outer second air swirl vane adjusting rod 42 door adjusting rod
The cyclone of 43 inner second air swirl vane adjusting rod 44
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
In the utility model, in the case where opposite explanation is not made, the noun of locality for using such as " upper and lower, left and right " is generally
Refer to the upper and lower, left and right shown in refer to the attached drawing；" inside and outside " refers to the inside and outside of the profile relative to each part in itself.
As shown in figure 1, the utility model provides a kind of coal burner, including primary air piping 10 and it is socketed in primary air piping
Secondary air channel 20 on 10, the nozzle of the primary air piping 10 forms oriented axially projecting multiple flange parts 30, described convex
The width that edge 30 has rectangular top 31 and the bottom 32 being arranged on spout side face, bottom 32 is more than rectangular top 31, and
The top surface of rectangular top 31 is transitted to arcs of recesses.Because the area of the rectangular top 31 of flange part 30 is small, bottom area is big, because
And it is smaller to the disturbance of First air center flow, it is larger to the disturbance of First air root, when First air carries coal dust blows over, because convex
The effect of damming of edge 30, can to a certain extent improve primary air velocity so that coal dust is difficult to be flowed back in burner nozzle area.
Further, the multiple flange part 30 is the 8-10 that is evenly distributed, and with primary air piping 10
The concordant first surface 33 in spout-top face, the surface area sum of the first surface 33 of multiple flange parts 30 is the primary air piping
The 10-20% of 10 circulation areas.The flange part 30 for so setting, at the burning initial stage, microvariations do not interfere with the steady of flame not only
Surely recirculating zone high-temperature flue gas can also be promoted preferably to mix with coal dust, the large disturbances in later stage can strengthen late combustion one or two times
The mixing intensity of wind, promotes the after-flame degree of coal dust.Simultaneously because the effect of damming of flange part, improves to a certain extent
Primary air velocity so that coal dust is difficult to be flowed back to burner nozzle area, protects burner, it is to avoid burner overtemperature and coking
The problems such as generation.Specifically, the flange part is formed as the shape of a hoof, and is made by by wear-resisting, exotic material.
Further, since the flange part 30 is arranged on the spout of primary air piping, therefore only needs to simple transformation and can just throw
Enter to use.For example, each flange part 30 can be formed respectively, nozzle is welded on.
In order to preferably be guided to wind, the thickness in preferred flange portion 30 is from the spout side face to the rectangular top
31 top surface is gradually reduced.Specifically, the height of flange part 30 is D, and the width of bottom 32 is L1, and the top surface of rectangular top 31 is wide
Spend for L2 can be adjusted corresponding to coal, to reach steady combustion, the purpose of anti-coking.The shape in preferred flange portion 30 meets：
Curve 1：(X-2a)2+(Y-1a)2=1 { X ∈ (1a, 2a)；Y ∈ (0a, 1a) }；Curve 2：Y=1 { Y ∈ (- 1a, 1a) }；Curve 3：
(X+2a)2+(Y-1a)2=1 { X ∈ (- 1a, -2a)；Y ∈ (0a, 1a) }, wherein, constant a is arithmetic number.The curve 1,2,3 is
Defined in cartesian coordinate system, curve 1 is circular arc of the center of circle at (1a, 2a), and curve 2 is the straight line for 1a apart from y-axis, bent
Line 3 is circular arc of the center of circle at (- 1a, -2a).Wherein, constant a can be according to the geomery of primary air piping 10, set flange
The number in portion 30 etc. is appropriately arranged with.For example, a can be any arithmetic number, such as a=1.Such as Fig. 1 shows meaning in arrow.
On the basis of above-mentioned technical proposal, secondary air channel 20 is included in the periphery of the primary air piping 10 from inside to outside successively
The direct-current secondary airduct 21 of arrangement, inner second air pipe 22 and outer second air pipe 23.Due to coal dust firing described in the utility model
Device increased one non-swirl secondary air compared to the coal burner of prior art, and the non-swirl secondary air is situated between near First air
Between First air and inner second air, and its air quantity is smaller, accounts for the 15% of total secondary air flow.In such manner, it is possible to by with solid
The direct current wind of the flow direction before orientation, certain package action is played when First air sprays spout to First air, strengthens First air
Rigidity so that First air will not dissipate too early, makes early stage First air coal dust concentrate near Central backflow area, thus on the one hand rises
To steady combustion effect, the export-oriented diverging of pulverized coal particle is on the other hand also avoided, mitigate burner nozzle coking.And can be by straight
Stream wind can solve the problem that the First air that carries coal dust mix brought ignition issues with Secondary Air, reduce the centre such as NOx product
Thing and the probability of oxygen premature contact, preferably suppress the growing amount at coal dust firing initial stage NOx.
Further, the nozzle of direct-current secondary airduct 21 is formed with water conservancy diversion governor motion 24 such that it is able to institute's shape
Intensity into direct current wind is controlled to tackle the coal of different size.
On the basis of above-mentioned technical proposal, direct-current secondary airduct 21, inner second air pipe 22 and outer second air pipe 23 enter
Wind eddy flow governor motion is provided with air port, the wind eddy flow governor motion adjusts the eddy flow of corresponding each secondary air channel 20 respectively
Intensity and/or air quantity.Using above-mentioned wind eddy flow governor motion, can realize to the independent of the swirl strength of each passage and air quantity
High-temperature flue gas volume in burner hearth can be drawn onto coal powder ignition area by control, swirling eddy, and firing coal-dust simultaneously makes it stable burning.Together
When, thus it is possible to vary swirl strength, so as to adjust the undershoot ability of breeze airflow, the space of sufficiently effective utilization lower hearth makes
Coal dust is effectively burnt.In addition, burner is by the way of this air stage feeding, not only contribute to coal dust catch fire with surely
Combustion, is also beneficial to control the generation of nitrogen oxides in flame.
Further, inner second air pipe 22 has the first air inlet of inner second air pipe 26 and the air intake of inner second air pipe second
Mouth 27, the first air inlet of inner second air pipe 26 and the second air inlet of inner second air pipe 27 are respectively arranged with inner second air door adjusting rod
42 and inner second air swirl vane adjusting rod 43.
On the basis of above-mentioned technical proposal, the first air inlet of inner second air pipe 26 and the second air inlet of inner second air pipe 27
The spout of inner second air pipe 22 is communicated to by platform shape pipe 29, cyclone 44 is provided with platform shape pipe 29, so can be by adjusting
Section cyclone 44 more reliably controls mixing point, to adapt to the coal of different specifications, it is ensured that coal dust after-flame, and effectively prevents
Only spout localized hyperthermia, slagging prevention.In addition it is possible to further control reducing zone and zoneofoxidation, the growing amount of NOx is reduced.
Specifically, by foregoing description, a kind of coal burner provided by the utility model is due to flange
Portion 30, it is thus possible to being disturbed to wind as shown in Figure 3.Wherein, A is microvariations ignition zone, and B is interior recirculating zone, and C is to disturb greatly
Dynamic burning-out zone, D is outer second air, and E is inner second air, and F is non-swirl secondary air, and G is First air.It can be seen that, due to coal burner
Can form above-mentioned four strands of wind, i.e. outer second air D, inner second air E, non-swirl secondary air F, First air G, and by the shape of flange part 30
Into can make flame stabilization microvariations ignition zone A, can strengthen air and coal dust mixing interior recirculating zone and strengthen one or two
Secondary wind mixing, promotes the large disturbances burning-out zone C of the after-flame degree of coal dust, so as to effectively prevent burner nozzle coking.Change
Combustion Flow Field in stove is become, has enable generating set to keep safely and steadily running so as to improve combustion efficiency.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, but, the utility model is not limited
Detail in above-mentioned implementation method, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out various simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
Possible combination is planted no longer separately to illustrate.
Additionally, can also be combined between a variety of implementation methods of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (10)
1. a kind of coal burner, including primary air piping (10) and the secondary air channel being socketed on the primary air piping (10)
(20), it is characterised in that the nozzle of the primary air piping (10) forms oriented axially projecting multiple flange parts (30), described
Flange part (30) is with rectangular top (31) and the bottom (32) being arranged on the spout side face, the width of the bottom (32)
More than the rectangular top (31), and the top surface of the rectangular top (31) is transitted to arcs of recesses.
2. coal burner according to claim 1, it is characterised in that the multiple flange part (30) is to be evenly distributed
8-10.
3. coal burner according to claim 1, it is characterised in that the flange part (30) with the First air
The concordant first surface (33) in the spout-top face of (10) is managed, the surface area sum of the first surface (33) is the primary air piping
(10) 10-20% of circulation area.
4. coal burner according to claim 3, it is characterised in that the thickness of the flange part (30) is from the spout
Side face is gradually reduced to the top surface of the rectangular top (31).
5. coal burner according to claim 1, it is characterised in that the shape of the flange part (30) meets：Curve
1：(X-2a)2+(Y-1a)2=1 { X ∈ (1a, 2a)；Y ∈ (0a, 1a) }；Curve 2：Y=1 { Y ∈ (- 1a, 1a) }；Curve 3：(X+
2a)2+(Y-1a)2=1 { X ∈ (- 1a, -2a)；Y ∈ (0a, 1a) }, wherein, constant a is arithmetic number.
6. the coal burner according to any one in claim 1-5, it is characterised in that secondary air channel (20) bag
Include direct-current secondary airduct (21), the inner second air pipe (22) and outer being sequentially arranged from inside to outside in the primary air piping (10) periphery
Secondary air channel (23).
7. coal burner according to claim 6, it is characterised in that the nozzle shape of the direct-current secondary airduct (21)
Into there is water conservancy diversion governor motion (24).
8. coal burner according to claim 6, it is characterised in that the direct-current secondary airduct (21), inner second air
The air inlet of pipe (22) and outer second air pipe (23) is provided with wind eddy flow governor motion, and the wind eddy flow governor motion is adjusted respectively
The swirl strength and/or air quantity of corresponding each secondary air channel (20) of section.
9. coal burner according to claim 6, it is characterised in that the inner second air pipe (22) is with inner second air
The air inlet of pipe first (26) and the air inlet of inner second air pipe second (27), the air inlet of inner second air pipe first (26) and interior two
The air inlet of secondary airduct second (27) is respectively arranged with inner second air door adjusting rod (42) and inner second air swirl vane adjusting rod
(43)。
10. coal burner according to claim 9, it is characterised in that the air inlet of inner second air pipe first (26)
With the spout that the air inlet of inner second air pipe second (27) is communicated to the inner second air pipe (22) by platform shape pipe (29), institute
State and be provided with cyclone (44) in platform shape pipe (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621383201.5U CN206274163U (en) | 2016-12-16 | 2016-12-16 | Coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621383201.5U CN206274163U (en) | 2016-12-16 | 2016-12-16 | Coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206274163U true CN206274163U (en) | 2017-06-23 |
Family
ID=59063078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621383201.5U Active CN206274163U (en) | 2016-12-16 | 2016-12-16 | Coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206274163U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339789A (en) * | 2021-06-11 | 2021-09-03 | 华北电力大学（保定） | Coking-prevention pulverized coal burner with horseshoe-shaped turbulence teeth |
| WO2022042732A1 (en) * | 2020-08-31 | 2022-03-03 | 煤科院节能技术有限公司 | Two-channel burner and method of use therefor, and multi-channel single-cone burner and method of use therefor |
-
2016
- 2016-12-16 CN CN201621383201.5U patent/CN206274163U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022042732A1 (en) * | 2020-08-31 | 2022-03-03 | 煤科院节能技术有限公司 | Two-channel burner and method of use therefor, and multi-channel single-cone burner and method of use therefor |
| CN113339789A (en) * | 2021-06-11 | 2021-09-03 | 华北电力大学（保定） | Coking-prevention pulverized coal burner with horseshoe-shaped turbulence teeth |
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