CN102454988B - Pulverized coal burner and boiler - Google Patents
Pulverized coal burner and boiler Download PDFInfo
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- CN102454988B CN102454988B CN201010528178.5A CN201010528178A CN102454988B CN 102454988 B CN102454988 B CN 102454988B CN 201010528178 A CN201010528178 A CN 201010528178A CN 102454988 B CN102454988 B CN 102454988B
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- 239000003245 coal Substances 0.000 title claims abstract description 81
- 238000002485 combustion reaction Methods 0.000 claims abstract description 98
- 239000002817 coal dust Substances 0.000 claims description 34
- 239000000411 inducer Substances 0.000 claims description 31
- 239000000843 powder Substances 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 9
- 230000001464 adherent effect Effects 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims 1
- 238000004939 coking Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Abstract
The invention discloses a pulverized coal burner, comprising a heat source and an internal combustion chamber, the heat source is arranged in the internal combustion chamber, the internal combustion chamber is provided with an inlet, a main long cylindrical combustion chamber and an outlet, the heat source can ignite pulverized coal passing through the internal combustion chamber, and enables the pulverized coal to perform incomplete combustion in the internal combustion chamber; a swirl vane is arranged in the internal combustion chamber. In the invention, the pulverized coal burner and a boiler are provided to avoid the coking phenomenon in the internal combustion chamber or on the inner wall of the main combustion chamber and solve the problem of uneven distribution of pulverized coal concentration in the circumferential direction of the internal combustion chamber or the main combustion chamber.
Description
Technical field
The present invention relates to a kind of pulverized coal combustion, relate in particular to a kind of internal combustion type pulverized coal burner and boiler.
Background technology
For a long time, start and stop and the low-load combustion-stabilizing of thermal power generation unit boiler, consumed a large amount of fuel oil.Show according to middle Electricity Federation statistics, between 2009 to 2015, China's electric power installed capacity approximately increases by 0.67 ten thousand kW every year on average.The rapid growth of supercritical parameter Construction of Unit, debugging, start and stop and stable combustion oil also will increase suddenly.For response " State Council is about the notice of further reinforcement fuel-economizing power saving operation ", at present, most thermal power generation unit boilers have all adopted plasma without tiny-oil ignition technology such as oil, small oil guns, have saved great amount of fuel oil.But adopt fuel bituminous coal or the meager coal that normally volatile matter content is higher of these technology and operational excellence boiler unit, even the boiler unit of these operational excellences, also there is the burn-off rate problem on the low side of coal dust in black furnace ignition trigger process, not only reduce the economy of boiler operatiopn, brought potential safety hazard also to the operation of boiler simultaneously.And for the lower ature of coal of volatile matter content, plasma or small oil gun often cannot available point burning coal powders, cause oil-saving effect not obvious, even cause some plasma on the shelf without tiny-oil ignition devices such as oil, small oil guns.
The application number of the applicant's first to file is 200910175071.4, in the patent application that denomination of invention is " a kind of coal burner and have the boiler of this coal burner ", provides a kind of coal burner.Please refer to Fig. 1, this figure is the structure chart of the coal burner that provides of this patent application.This coal burner comprises thermal source 200 and internal combustion chamber 100, and internal combustion chamber 100 has import 101 and outlet 102.The abundant burning of coal dust in this burner, can make the temperature in burner high, easily causes slagging scorification in burner.Particularly when velocity field deflection in burner, circumferentially when coal powder density skewness, the result that is almost inevitable of the slagging scorification in burner.
Summary of the invention
The object of the present invention is to provide a kind of internal combustion type pulverized coal burner and the boiler that can effectively avoid the slagging scorification of burner internal combustion chamber.
To achieve these goals, the invention provides a kind of coal burner, comprise thermal source and internal combustion chamber, described thermal source is positioned at internal combustion chamber, and described internal combustion chamber has import, long tubular main chamber and outlet; Described thermal source can be lighted the coal dust by internal combustion chamber, and makes coal dust in internal combustion Indoor Combustion;
In described internal combustion chamber, swirl vane is installed.
Preferably, described internal combustion chamber comprises the deceleration inducer joining with described main chamber front end, and the sectional area of described deceleration inducer is less than the sectional area of main chamber.
Preferably, described swirl vane is arranged on deceleration inducer, and has 2 blades at least.
Preferably, all swirl vanes are distributed in the same section of described internal combustion chamber, and phase difference between adjacent two swirl vanes equates.
Preferably, the windward side of described swirl vane is that ceramic material is made.
Preferably, described swirl vane comprises first plane parallel with airflow direction, is the second plane of the first predetermined angular with the first plane, between described the first plane and the second plane, connects by curved surface;
Described curved surface and described the first plane and the second plane are all tangent.
Preferably, the length 10 of described the first plane is to 50mm.
Preferably, the first predetermined angular is specially 10 ° to 80 °.
Preferably, described swirl vane is the 3rd plane that is the second predetermined angular with airflow direction.
Preferably, described internal combustion chamber also comprises the acceleration outlet section joining with described main chamber rear end; The sectional area of described acceleration outlet section is less than the sectional area of main chamber.
Preferably, described internal combustion chamber also comprises the outlet adjustment section of joining with acceleration outlet section rear end, and the sectional area that section front-end and back-end are adjusted in outlet is equal.
The present invention also provides a kind of boiler, comprises burner hearth, also comprises described any coal burner above; The outlet of described coal burner internal combustion chamber communicates with described burner hearth, and the coal dust that makes to catch fire enters in burner hearth and burns away.
Coal burner described in the embodiment of the present invention, due to swirl vane being installed in internal combustion chamber, can make the wind powder mixture in burner rotate in internal combustion chamber, thereby produce three kinds of phenomenons: the one, the centrifugal force that rotation produces makes coal dust radially produce particle diameter segregation along internal combustion chamber, internal combustion chamber is thicker the closer near coal dust wall, concentration is larger, thinner the closer to the coal dust at internal combustion chamber center; The 2nd, under the effect of centrifugal force, higher the closer to internal combustion chamber wall wind speed, lower the closer to the wind speed at internal combustion chamber center.; Three is that the rotation of a wind can promote the velocity field redistribution in internal combustion chamber, and effectively release rate field deflection, improves the phenomenon of coal powder density along the circumferential skewness of internal combustion chamber.
The resultant effect that first two phenomenon produces is: the coal particle size at internal combustion chamber center is little, and wind speed is low, and coal dust is more easily lighted, and has further improved the combustion stability of coal burner.Particularly, in the time that primary air velocity is higher, described effect will be very obvious, thereby improve the adaptability of burner for wind speed; And coal particle size is thick near wall, wind speed is high, be difficult for catching fire, thereby internally combustion chamber wall face forms protection, therefore can effectively prevent slagging scorification in burner.
The effect that the third phenomenon obtains is: eliminate the deflection of velocity field in internal combustion chamber, can further eliminate the hidden danger of slagging scorification in burner; Coal powder density can make the flow field characteristic in stove more reasonable along the improvement of the circumferential skewness phenomenon of internal combustion chamber, thereby further improves the burnout rate of coal dust.
Therefore, concrete following some beneficial effect of the relative prior art of coal burner described in the embodiment of the present invention:
One, described in the embodiment of the present invention, coal burner can effectively be avoided the inwall slagging scorification of burner internal combustion chamber;
Two, described in the embodiment of the present invention, coal burner can solve velocity field deflection in internal combustion chamber, circumferentially the inhomogeneous problem of coal powder density distributed pole;
Three, described in the embodiment of the present invention, coal burner can improve coal dust firing stability effectively;
Four, described in the embodiment of the present invention, coal burner can improve the burnout rate of coal dust in black furnace start-up course;
Five, described in the embodiment of the present invention, coal burner can reduce the constraints to operational factor.
Brief description of the drawings
The structure chart of the coal burner that Fig. 1 provides for the patent application of the applicant's earlier application;
The structural representation of the coal burner that Fig. 2 provides for embodiment mono-;
The structural representation of the coal burner that Fig. 3 provides for embodiment bis-;
Fig. 4 shows the structural representation of the coal burner of the another kind of structure of embodiment bis-;
Fig. 5 is the swirl vane first example structure figure of coal burner of the present invention;
Fig. 6 is the swirl vane second example structure figure of coal burner of the present invention.
Detailed description of the invention
For the ease of those skilled in the art's the understanding of the present invention; below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail; this part is described and is only used to describe in detail technical scheme provided by the invention, and concrete description order and term should not form any restriction to protection domain of the present invention.
The said section of the present invention refers to the section perpendicular with coal dust flow direction; And taking coal dust flow direction as reference, be front near the position of internal combustion chamber import, after being away from the position of internal combustion chamber import.
Please refer to Fig. 2, this figure is the structural representation of the coal burner that provides of embodiment mono-.
Coal burner described in the embodiment of the present invention one comprises burning things which may cause a fire disaster 200 and internal combustion chamber 100, and internal combustion chamber 100 has import 101 and outlet 102, forms the main chamber of long tubular in it, forms an applicable space.In the present embodiment, internal combustion chamber 100 also comprises the intake stack 300 communicating with main chamber front end.Burning things which may cause a fire disaster 200 stretches into internal combustion chamber 100 from intake stack 300; Intake stack 300 communicates with a wind pulverized coal channel.
In described internal combustion chamber 100, swirl vane 5 is installed.
Coal burner described in the embodiment of the present invention one, owing in described internal combustion chamber 100, swirl vane 5 being installed, (can be also the swirl vane 5 of installing mutually with intake stack 300 inwalls), make to be got to through the coal dust of swirl vane 5 inwall of internal combustion chamber 100, produce the adherent phenomenon of obvious high concentration pulverized coal air-flow.Owing to having high concentration pulverized coal air-flow at the inwall of internal combustion chamber 100, like this, the fire that burning things which may cause a fire disaster 200 is lighted can directly not burn the inwall of described internal combustion chamber 100, therefore has great benefit to controlling described internal combustion chamber 100 internal face temperature, can effectively avoid the inwall of internal combustion chamber 100 to occur coking phenomenon.
Swirl vane 5 can also improve the phenomenon of the circumferential distributed pole inequality of coal powder density in air-flow, and breeze airflow is realized to guiding, and coal dust is uniformly distributed circumferentially in internal combustion chamber 100.
Embodiment bis-:
Please refer to Fig. 3, this figure is the structural representation of the coal burner that provides of embodiment bis-.
On the basis of the embodiment of the present invention one, the deceleration inducer 110 that the internal combustion chamber 100 of the coal burner that embodiment bis-provides comprises main chamber 120 and joins with main chamber 120 front ends, import 101 is positioned at the confluce of deceleration inducer 110 and intake stack 300.
On deceleration inducer 110 inwalls, swirl vane 5 can be installed.
As shown in Figure 3, the sectional area of deceleration inducer 110 is less than the sectional area of main chamber 120.In the time that breeze airflow enters the larger main chamber 120 of sectional area from the less deceleration inducer 110 of sectional area, the flow velocity of breeze airflow can correspondingly reduce.Like this, in the situation that internal combustion chamber 100 length do not change, the breeze airflow that flow velocity is low needs the longer time to arrive outlet 102, thereby has extended the time of staying of coal dust in internal combustion chamber 100, and then realizes the object that extends the internal combustion time.
Coal dust is stopped the longer time in the internal combustion chamber with predetermined length, can make coal dust from thermal source and the coal dust liberated heat that caught fire absorb more heat, more easily catch fire, burn, increase the intensity of high temperature pulverized coal flame; And then, on the one hand can the abundant burning of intensity coal dust in burner hearth; On the other hand, because high temperature pulverized coal flame has higher intensity, can under lower fire box temperature, keep hearth combustion continue carry out, thereby can reduce further the minimum operation load of boiler.
Be appreciated that, in the coal burner that the embodiment of the present invention two provides, extend the time of breeze airflow in internal combustion chamber 100 interior stops although can reach, but between deceleration inducer 110 and main chamber 120 owing to there being right-angle structure, this structure easily makes breeze airflow be subject to the impact in eddy current and dead band, produces the problem of accumulated powder.For this reason, deceleration inducer 110 can also be set to the structure of sectional area gradual change.
As shown in Figure 4, the figure shows the structural representation of the coal burner of the another kind of structure of embodiment bis-.
The coal burner of the another kind of structure of embodiment bis-comprises the deceleration inducer 110 ' joining with main chamber 120 front ends.The longitudinal profile of this deceleration inducer 110 ' is pyramidal structure.
On breeze airflow flow direction, the sectional area of described deceleration inducer 110 ' increases gradually, and like this, in breeze airflow flow process, the flow velocity of breeze airflow reduces gradually.The longitudinal profile that is appreciated that deceleration inducer 110 ' is also not limited to pyramidal structure, can be also other structures of sectional area gradual change.
Coal burner described in the embodiment of the present invention two, due to swirl vane 5 being installed on the inwall at deceleration inducer 110 ', the coal dust of process swirl vane 5 is got to the inwall of deceleration inducer 110 ' or the inwall (inner tube wall) of main chamber 120 is upper, produces the adherent phenomenon of obvious high concentration pulverized coal air-flow.Because the inwall of the inwall at deceleration inducer 110 ' or main chamber 120 exists high concentration pulverized coal air-flow, like this, the fire that burning things which may cause a fire disaster 200 is lighted can directly not burn described main chamber 120 inner tube walls, therefore there is great benefit to controlling described main chamber 120 inner tube wall surface temperatures, can effectively avoid the inwall of main chamber 120 to occur coking phenomenon.
Because coal dust is constantly in internal combustion chamber 100 or the interior burning of main chamber 120, lasting high temperature may make shorten the service life of coal burner.In order to improve internal combustion chamber 100 or 120 service lifes of main chamber, can also be at internal combustion chamber 100 or the interior pottery refractory masses that arranges of main chamber 120.
Swirl vane 5 can also improve coal dust in wind powder stream and, by the phenomenon of deceleration inducer 110,110 ' the circumferential distributed pole inequality of breeze airflow concentration causing, breeze airflow be realized to guiding, and coal dust is uniformly distributed circumferentially in main chamber 120.
Swirl vane 5 is specifically as follows 2, and all swirl vanes 5 can be distributed in described deceleration inducer 110,110 ' same section.
Like this, producing under identical eddy flow effect, all swirl vanes 5 are distributed in relatively all swirl vanes 5 of resistance in the same section of described deceleration inducer 110 ', and to be arranged in resistance on different section little.
All swirl vanes 5 can be symmetrically distributed on described deceleration inducer 110,110 ' same section centered by described deceleration inducer 110,110 ' center line.
Phase difference between adjacent two swirl vanes 5 can equate, all swirl vanes 5 are preferably evenly distributed in described deceleration inducer 110,110 ' same section.Like this, swirl vane 5 can make breeze airflow be uniformly distributed circumferentially in main chamber 120.
In deceleration inducer 110, be furnished with some swirl vanes 5, first the breeze airflow that enters internal combustion chamber 100 or main chamber 120 center is lighted fast and is formed central flame core by burning things which may cause a fire disaster 200.Because the concentration of coal dust in an air-flow (wind) is higher, the flame flow after catching fire need to fill into certain air-breathing, further consolidates fiery core.In an outer field air-flow (wind), coal dust intermixture rotates adherent phenomenon after swirl vane 5, because swirl vane 5 is preferably circumferentially distributed on same circumference (section), therefore it is also equally distributed, rotating adherent coal dust on circumference.Like this; internal combustion chamber 100 or the whole inwall of main chamber 120 have been played to protective effect; produce one thinner breeze airflow at internal combustion chamber 100 or main chamber 120 centers simultaneously; for the fiery core being formed centrally in internal combustion chamber 100 or main chamber 120 provides good tonifying Qi condition, can further consolidate flame kernel intensity.Meanwhile, after coal powder ignition, liberated heat can refire internal combustion chamber 100 or the interior remaining coal dust of main chamber 120, and is injected into hearth combustion simultaneously.
Certainly, the interval between adjacent two swirl vanes 5 also can be also unequal.
Swirl vane 5 is specifically as follows and is at least 2, and all swirl vanes 5 also can be distributed in described deceleration inducer 110,110 ' different section.Each swirl vane 5 is in the projection perpendicular to described deceleration inducer 110,110 ' center line, symmetrical with respect to the projected centre point of described center line.
Equally, in all swirl vanes 5 are distributed in described deceleration inducer 110,110 ' different section time, the phase difference between adjacent two swirl vanes 5 can equate, also can be unequal.
The windward side of described swirl vane 5 can be made up of ceramic material.This is owing to using ceramic material can improve the abrasionproof performance of swirl vane 5, improving service life.
Described in the embodiment of the present invention, swirl vane 5 can comprise camber blades, prismatic blade and three kinds of forms of surface of revolution blade.
The coal burner that embodiment bis-provides, also has the acceleration spout member 130 joining with main chamber 120 rear ends, has suitable momentum, to meet boiler combustion organization need while making breeze airflow combustion flame spray into burner hearth by spout member 130.Acceleration spout member 130 sectional areas should be less than the sectional area of main chamber 120, to increase breeze airflow combustion flame momentum.Preferably, the sectional area that accelerates spout member 130 reduces gradually, and the flow velocity of breeze airflow is increased gradually, improves the rigidity of burning jet.
Internal combustion chamber 100 can also arrange outlet adjustment component 140, and the front end that exports adjustment component 140 is joined with acceleration spout member 130 rear ends, with for further adjustments to breeze airflow flame and combustion product, meets the needs of boiler furnace burning tissue.Outlet adjustment component 140 can be the tubular construction that front-end and back-end sectional area is equal, also can be set to according to actual needs other concrete structures.
For the ease of those skilled in the art's understanding, illustrate the concrete structure of the described swirl vane 5 that adopts camber blades and two kinds of forms of prismatic blade below in conjunction with Fig. 5 and Fig. 6.
Referring to Fig. 5, swirl vane the first example structure figure that this figure is coal burner of the present invention.
Described in first embodiment of the invention, swirl vane 5 is camber blades form.The direction of arrow shown in Fig. 5 is the direction of wind powder air-flow.
Described in first embodiment of the invention, swirl vane 5 specifically can comprise: the first plane 501 of paralleling with wind powder airflow direction, be second plane 502 at the first predetermined angular β (angle of β shown in Fig. 6) with the first plane 501, between described the first plane 501 and the second plane 502, connect by curved surface 503.
The first predetermined angular β, can be poor according to the diameter at deceleration inducer 110 two ends, and the diameter at two ends is set.The first predetermined angular β is specifically as follows arbitrarily angled between 10 ° to 80 °.
Described the first plane 501 is closed on the import of air-flow, and the second plane 502 is closed on the outlet of air-flow.The length (being parallel to the length of the first plane 501 of airflow direction shown in Fig. 5) of described the first plane 501 can be between 0 to 20mm certain length.
The length of described the first plane 501 can be 0, and described in first embodiment of the invention, swirl vane can not have the first plane 501.
The length of described the second plane 502 is between 10-50mm.The second plane 502 Main Functions are the outlet rigidity that keep through the vortex gas-flow of curved surface 503.
Described curved surface 503 is all tangent with described the first plane 501 and the second plane 502.Described curved surface 503 can be arc surface.Described curved surface 503 is preferably to the arc surface of described air-flow side projection.
Swirl vane 5 can have any shape along the cross section of length (comprising the length of the first plane 501, curved surface 503 and the second plane 502) direction.The cross section along its length of swirl vane 5 shown in Fig. 5 is specially rectangle.
The length (comprising whole length of the first plane 501, curved surface 503 and the second plane 502) of swirl vane 5 is relevant with breeze airflow amount, and the breeze airflow inlet more length of maelstrom blade 51 is just larger.The length of the less swirl vane 5 of breeze airflow inlet is just less.
Referring to Fig. 6, swirl vane the second example structure figure that this figure is coal burner of the present invention.
Described in second embodiment of the invention, swirl vane 5 is prismatic blade form.The direction of arrow shown in Fig. 6 is the direction of breeze airflow (wind).
Described in second embodiment of the invention, swirl vane 5 is specifically as follows the 3rd plane 5a that is the second predetermined angular (angle of γ shown in Fig. 6) with airflow direction.
Swirl vane 5 can have any shape along the cross section of the 3rd plane 5a length direction.The cross section along its length of swirl vane 51 shown in Fig. 6 is specially rectangle.
The swirl vane 5 i.e. length of the 3rd plane 5a is relevant with breeze airflow amount, and the breeze airflow inlet more length of maelstrom blade 5 is just larger.The length of the less swirl vane 5 of breeze airflow inlet is just less.
Described in third embodiment of the invention, swirl vane 5 can also be rotating curved surface structure (not shown).
Described in third embodiment of the invention, swirl vane 5 specifically can change the curved surface of the first embodiment 503 into surface of revolution.And surface of revolution can be tangent with the first plane 501, the second plane 502.
Certainly, swirl vane 5 also can not comprise the first plane 501 described in third embodiment of the invention, only closes on the surface of revolution of the import of air-flow, and with tangent the second adjacent plane 502 of described surface of revolution.Equally, the second plane 502 Main Function leaves are in order to keep the outlet rigidity through the vortex gas-flow of surface of revolution.
Described in same third embodiment of the invention, the length of swirl vane 5 is relevant with breeze airflow amount, and the breeze airflow inlet more length of maelstrom blade 5 is just larger.The length of the less swirl vane 51 of breeze airflow inlet is just less.
The present invention also provides a kind of boiler, comprises burner hearth and described any coal burner above; The outlet of described coal burner internal combustion chamber communicates with described burner hearth, and the coal dust that makes to catch fire enters in burner hearth and burns away.
The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention; can also make some improvements and modifications; also can above-mentioned detailed description of the invention combine, these technical schemes of improving, retouching and be combined to form also should be considered as protection scope of the present invention.
Claims (12)
1. a coal burner, is characterized in that, comprises thermal source and internal combustion chamber, and described thermal source is positioned at internal combustion chamber, and described internal combustion chamber has import, long tubular main chamber and outlet; Described main chamber communicates with intake stack by described import, and described intake stack communicates with a wind pulverized coal channel; Described thermal source can be lighted the coal dust by internal combustion chamber, and makes coal dust in internal combustion Indoor Combustion;
On the inwall of described internal combustion chamber, swirl vane is installed; Described swirl vane, for the coal dust through described swirl vane is got to the inwall of internal combustion chamber and is produced the adherent phenomenon of high concentration pulverized coal air-flow, and, improve the phenomenon of coal powder density along internal combustion chamber circumferential asymmetry for promoting the velocity field redistribution in internal combustion chamber.
2. coal burner according to claim 1, is characterized in that, described internal combustion chamber comprises the deceleration inducer joining with described main chamber front end, and the sectional area of described deceleration inducer is less than the sectional area of main chamber.
3. coal burner according to claim 2, is characterized in that, described swirl vane is arranged on deceleration inducer, and has 2 blades at least.
4. coal burner according to claim 3, is characterized in that, all swirl vanes are distributed in the same section of described internal combustion chamber, and phase difference between adjacent two swirl vanes equates.
5. according to the arbitrary described coal burner of claim 1 to 4, it is characterized in that, the windward side of described swirl vane is that ceramic material is made.
6. according to the arbitrary described coal burner of claim 1 to 5, it is characterized in that, described swirl vane comprises first plane parallel with airflow direction, is the second plane of the first predetermined angular with the first plane, between described the first plane and the second plane, connects by curved surface;
Described curved surface and described the first plane and the second plane are all tangent.
7. coal burner according to claim 6, is characterized in that, the length 10 of described the first plane is to 50mm.
8. coal burner according to claim 6, is characterized in that, the first predetermined angular is specially 10 ° to 80 °.
9. according to the arbitrary described coal burner of claim 1 to 5, it is characterized in that, described swirl vane is the 3rd plane that is the second predetermined angular with airflow direction.
10. according to the coal burner described in claim 7 to 9 any one, it is characterized in that, described internal combustion chamber also comprises the acceleration outlet section joining with described main chamber rear end; The sectional area of described acceleration outlet section is less than the sectional area of main chamber.
11. coal burners according to claim 10, is characterized in that, described internal combustion chamber also comprises the outlet adjustment section of joining with acceleration outlet section rear end, and the sectional area that section front-end and back-end are adjusted in outlet is equal.
12. 1 kinds of boilers, comprise burner hearth, it is characterized in that, also comprise the coal burner described in any one in claim 1 to 11; The outlet of described coal burner internal combustion chamber communicates with described burner hearth, and the coal dust that makes to catch fire enters in burner hearth and burns away.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010528178.5A CN102454988B (en) | 2010-11-01 | 2010-11-01 | Pulverized coal burner and boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010528178.5A CN102454988B (en) | 2010-11-01 | 2010-11-01 | Pulverized coal burner and boiler |
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| Publication Number | Publication Date |
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| CN102454988A CN102454988A (en) | 2012-05-16 |
| CN102454988B true CN102454988B (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010528178.5A Active CN102454988B (en) | 2010-11-01 | 2010-11-01 | Pulverized coal burner and boiler |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103851620A (en) * | 2013-06-19 | 2014-06-11 | 山东润银生物化工股份有限公司 | Flame stabilizing cover |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4991520A (en) * | 1986-10-01 | 1991-02-12 | Babcock-Hitachi Kabushiki Kaisha | Ignition burner apparatus for pulverized coal |
| CN201073640Y (en) * | 2007-07-27 | 2008-06-18 | 绵阳西金科技发展有限公司 | Special-shaped blade separator |
| CN101725969A (en) * | 2010-01-19 | 2010-06-09 | 中国计量学院 | Low-NOx pulverized coal burner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7908259A (en) * | 1979-11-12 | 1981-06-01 | Bakker A | BURNER FOR POWDER-FUEL. |
| CN201412841Y (en) * | 2009-05-22 | 2010-02-24 | 胡旭辉 | Industrial boiler cyclone multistage type coal dust burner |
| CN201875705U (en) * | 2010-11-01 | 2011-06-22 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
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2010
- 2010-11-01 CN CN201010528178.5A patent/CN102454988B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4991520A (en) * | 1986-10-01 | 1991-02-12 | Babcock-Hitachi Kabushiki Kaisha | Ignition burner apparatus for pulverized coal |
| CN201073640Y (en) * | 2007-07-27 | 2008-06-18 | 绵阳西金科技发展有限公司 | Special-shaped blade separator |
| CN101725969A (en) * | 2010-01-19 | 2010-06-09 | 中国计量学院 | Low-NOx pulverized coal burner |
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