CN203286563U - Coal power burner nozzle capable of improving ignition and burning stabilization capacities - Google Patents
Coal power burner nozzle capable of improving ignition and burning stabilization capacities Download PDFInfo
- Publication number
- CN203286563U CN203286563U CN2013203035677U CN201320303567U CN203286563U CN 203286563 U CN203286563 U CN 203286563U CN 2013203035677 U CN2013203035677 U CN 2013203035677U CN 201320303567 U CN201320303567 U CN 201320303567U CN 203286563 U CN203286563 U CN 203286563U
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- bluff body
- steady combustion
- burner nozzle
- burning
- coal burner
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Abstract
The utility model relates to a coal power burner nozzle capable of improving ignition and burning stabilization capacities, which comprises a nozzle outlet (4); a burning stabilization bluff body (2) is arranged in the middle of the nozzle outlet (4) and is in a shape of a vertical cone body; the sectional area of the bluff body is gradually increased from the inside to the outside by taking the nozzle outlet (4) as the reference; the section of the nozzle outlet (4) is in the shape of an isosceles triangle. Coal powder air flows are sprayed out from two sides of the burning stabilization bluff body (2); the air flows form negative pressure in back of the burning stabilization bluff body (2) so as to enable high temperature smoke in a hearth to be subjected to entrainment, so that a relatively high temperature area is formed near the burning stabilization bluff body (2) of the nozzle outlet (4), and the high temperature can be provided for the ignition and the burning stabilization of the coal powder; in addition, the middles of the two sides of the burning stabilization bluff body (2) are provided with burning stabilization teeth (1), part of the coal powder is blocked by the burning stabilization teeth (1) to form turbulent flows at the burning stabilization teeth (1), so that the staying time of the coal powder at accessories of the burning stabilization teeth (1) is prolonged; the ignition and the burning stabilization of the coal powder can be facilitated.
Description
Technical field
The utility model relates to a kind of parts of coal burner, improves the coal burner nozzle that catches fire with steady combustion ability in particular to a kind of microphone.
Background technology
Generation current factory pulverized-coal fired boiler unit ignition trigger need to consume light diesel fuel, if the catching fire and steady combustion ability of burner throws the oil time will extend in start-up course.It is the load down service ability that the power plant boiler of grid company requirement simultaneously unit possesses certain peaking operation, the requirement of regulating to meet network load.If catching fire and steady combustion ability of burner, continue safe and stable operation in order to ensure unit, power plant will be forced to throw the steady combustion of oil.The fire coal in present domestic power plant source is generally more assorted in addition, and the ature of coal excursion is large, if catching fire and steady combustion ability of burner easily causes unstable combustion, boiler extinguishment, cause " non-stopping " work safety accident.Consider the environmental protection aspect, the boiler unit is also all carrying out the low nitrogen burning transformation at present, and the low nitrogen burning transformation easily causes the reduction of boiler combustion efficiency.
for example application number is 200880127844.5 Chinese invention patent, it discloses a kind of coal burner of oxygen combustion boiler, have following structure: the mode that faces throat to run through bellows configures burner inner core and burner urceolus, form coal dust and supply with stream between burner inner core and burner urceolus, outer circumferential side at the burner urceolus arranges to a plurality of oxygen spray devices of the direct oxygen gas-supplying in the place ahead of burner urceolus, this invention can make the burning from coal burner realize homogenising, and the high temperature that can suppress oxygen jet, but the nozzle exit of the burner that should invent is without any stop member, make the combustion-supporting effect of this burner not good, and structure is comparatively complicated.
The utility model content
The technological deficiency that exists in order to solve prior art, the object of the present invention is to provide catch fire coal burner nozzle with steady combustion ability of a kind of raising, this raising is caught fire and is solved with the coal burner nozzle of steady combustion ability the defect that has now in technology, can make the steady combustion ability of burner strong, the flameholding of coal dust, can not pollute environment.
Stable combustion chamber burner be grow up on the basis of bluff body burner mainly by the stable burning cavity cavity, bluff body separates corner block and forms with coal powder light-dark.It is a stable burning cavity on the outer mask of ordinary burner, utilize the chamber wall to eliminate two ends, bluff body up and down air-flow in bluff body burner and also entrainmented possibility to recirculating zone, the circulating flow strength of bluff body rear high-temperature flue gas is improved, increased the quality reflux ratio, bluff body is difficult for being burned, and has also reduced the possibility of slagging scorification and wearing and tearing simultaneously.Simultaneously, the effect that forces due to cavity left and right two walls, breeze airflow flows through the recirculating zone sealing that produces after bluff body, after namely guaranteeing the airflow passes bluff body, a segment distance still can converge into one air-flow, can not change original aerodynamic force field in stove, and the effect that the recirculating zone of bluff body increases Pulverized Coal Concentration and exchange heat exists still.Use coal, the test of meager coal shows, coal dust is at stable burning cavity once exporting the burning of catching fire, and flame stabilization, can de-oiling stable operation under the boiler load of 40-60%.
The raising of the present utility model coal burner nozzle with steady combustion ability that catches fire, it comprises jet expansion and nozzle chamber, the centre position of described jet expansion arranges a steady combustion bluff body.
Catching fire of coal dust generally needs three key elements with steady combustion: the first, the residing environment temperature of coal dust reaches the ignition temperature IT(℃ of coal dust); The second, the required oxygen amount of coal powder ignition burning be arranged; The 3rd, the time that have coal powder ignition to burn.The utility model solves the problems of the technologies described above the technical scheme that adopts: the coal burner nozzle following measures of taking measures, in the situation that breeze airflow itself possesses the second key element, make its first and three elements of also possessing coal powder ignition, thereby can reach, improve breeze airflow ignition and steady combustion purpose.Concrete measure is as follows: arrange steady combustion bluff body in the nozzle exit end centre position, sectional area becomes greatly gradually from inside to outside, and section is isosceles triangle.After breeze airflow is sprayed by steady combustion bluff body both sides, air-flow forms negative pressure and the burner hearth high-temperature flue gas is formed to entrainment be that high temperature entrainments the backflow flue gas district after bluff body, thereby form the relatively-high temperature zone near the vertical bluff body of jet expansion, for catching fire of coal dust provides high temperature with steady combustion.
Preferably, described steady combustion bluff body is vertical taper.
In such scheme, preferably, described steady combustion bluff body comprises major part and microcephaly.
In such scheme, preferably, the major part of described steady combustion bluff body is placed in nozzle chamber.
In such scheme, preferably, the microcephaly of described steady combustion bluff body is placed in nozzle exit.
In such scheme, preferably, the vertical cross section of described steady combustion bluff body is isosceles triangle.
In addition, at the middle part of the both sides of steady combustion bluff body, steady combustion tooth is set, the part breeze airflow is subjected to surely to fire stopping of tooth, and the tooth place forms flow-disturbing in steady combustion, has increased near the time of staying of coal dust steady combustion tooth, all is conducive to catching fire and steady combustion of coal dust.
In such scheme, preferably, the middle part of the both sides of described steady combustion bluff body is equipped with steady combustion tooth.
In such scheme, preferably, described steady combustion tooth is the horizontal stand stepwise.
Steady combustion tooth is the horizontal stand stepwise, under the perturbation action of steady combustion tooth, makes coal dust firing more fiercely, fully, has improved flame temperature and efficiency of combustion, has reached the purpose of energy savings.
In such scheme preferably, described steady combustion bluff body aluminium Alloys Casting.
In such scheme, preferably, described steady combustion bluff body is selected the steel panel beating.
In such scheme, preferably, the port of described jet expansion is that high temperature entrainments the backflow flue gas district.
In sum, the raising of the present utility model coal burner nozzle with steady combustion ability that catches fire: arrange steady combustion bluff body in the nozzle exit end centre position, sectional area becomes greatly gradually from inside to outside, and section is isosceles triangle.After breeze airflow was sprayed by steady combustion bluff body both sides, air-flow formed negative pressure the burner hearth high-temperature flue gas is formed and entrainments after bluff body, thereby formed the relatively-high temperature zone near the vertical bluff body of jet expansion, for catching fire of coal dust provides high temperature with steady combustion; Middle part in the both sides of steady combustion bluff body arranges steady combustion tooth, and the part breeze airflow is subjected to surely to fire stopping of tooth, and the tooth place forms flow-disturbing in steady combustion, has increased near the time of staying of coal dust steady combustion tooth, all is conducive to catching fire and steady combustion of coal dust.
Description of drawings
The structural representation of Fig. 1 for catching fire according to raising of the present utility model with a preferred embodiment of the coal burner nozzle of steady combustion ability.
The embodiment illustrated in fig. 1 cutaway view of Fig. 2 for catching fire according to raising of the present utility model with the coal burner nozzle of steady combustion ability.
Attached number in the figure:
The specific embodiment
The following description is only exemplary and be not in order to limit the disclosure, application or purposes in essence.Below in conjunction with Figure of description, the utility model being improved the specific embodiment catch fire with the coal burner nozzle of steady combustion ability is further described.
As shown in Figure 2, the raising of the present utility model coal burner nozzle with steady combustion ability that catches fire, it comprises jet expansion 4 and nozzle chamber, the centre position of described jet expansion 4 arranges a steady combustion bluff body 2.
Stable combustion chamber burner be grow up on the basis of bluff body burner mainly by the stable burning cavity cavity, bluff body separates corner block and forms with coal powder light-dark.It is a stable burning cavity on the outer mask of ordinary burner, utilize the chamber wall to eliminate two ends, bluff body up and down air-flow in bluff body burner and also entrainmented possibility to recirculating zone, the circulating flow strength of bluff body rear high-temperature flue gas is improved, increased the quality reflux ratio, bluff body is difficult for being burned, and has also reduced the possibility of slagging scorification and wearing and tearing simultaneously.Simultaneously, the effect that forces due to cavity left and right two walls, breeze airflow flows through the recirculating zone sealing that produces after bluff body, after namely guaranteeing the airflow passes bluff body, a segment distance still can converge into one air-flow, can not change original aerodynamic force field in stove, and the effect that the recirculating zone of bluff body increases Pulverized Coal Concentration and exchange heat exists still.Use coal, the test of meager coal shows, coal dust is at stable burning cavity once exporting the burning of catching fire, and flame stabilization, can de-oiling stable operation under the boiler load of 40-60%.
Catching fire of coal dust generally needs three key elements with steady combustion: the first, the residing environment temperature of coal dust reaches the ignition temperature IT(℃ of coal dust); The second, the required oxygen amount of coal powder ignition burning be arranged; The 3rd, the time that have coal powder ignition to burn.The utility model solves the problems of the technologies described above the technical scheme that adopts: the coal burner nozzle following measures of taking measures, in the situation that breeze airflow itself possesses the second key element, make its first and three elements of also possessing coal powder ignition, thereby can reach, improve breeze airflow ignition and steady combustion purpose.
Concrete measure is as follows: bluff body 2 is surely fired in the centre position, end at jet expansion 4, this surely fire bluff body 2 from inside to outside sectional area become gradually greatly, section is isosceles triangle.After the both sides ejection of breeze airflow by steady combustion bluff body 2, air-flow forms to the burner hearth high-temperature flue gas in the rear formation negative pressure of steady combustion bluff body 2 that to entrainment be that high temperature entrainments backflow flue gas district 3, thereby form the relatively-high temperature zone near the steady combustion bluff body 2 of jet expansion 4, for catching fire of coal dust provides high temperature with steady combustion.
Steady combustion bluff body 2 is vertical taper, and it comprises major part and microcephaly.The major part of described steady combustion bluff body 2 is placed in nozzle chamber; The microcephaly of steady combustion bluff body 2 is placed in jet expansion 4 places.The vertical cross section of steady combustion bluff body 2 is isosceles triangle.
As shown in Figure 1, at the middle part of the both sides of steady combustion bluff body 2, steady combustion tooth 1 is set, the part breeze airflow is subjected to surely to fire stopping of tooth 1, and 1 place forms flow-disturbing at steady combustion tooth, has increased near the time of staying of coal dust steady combustion tooth 1, all is conducive to catching fire and steady combustion of coal dust.
Described steady combustion tooth 1 is the horizontal stand stepwise, under the perturbation action of steady combustion tooth, makes coal dust firing more fierce, complete, has improved flame temperature and efficiency of combustion, has reached the purpose of energy savings.
The middle part of the both sides of steady combustion bluff body 2 is equipped with steady combustion tooth 1.Described steady combustion bluff body 2 aluminium Alloys Castings or steel panel beating, because aluminium alloy casting or steel panel beating all have good high-temperature stability, and can be not damaged easily, therefore surely fire the material of bluff body 2 aluminium Alloys Castings or steel panel beating.
The port of jet expansion 4 is that high temperature entrainments backflow flue gas district 3.After the both sides ejection of breeze airflow by steady combustion bluff body 2, air-flow forms to the burner hearth high-temperature flue gas in the rear formation negative pressure of steady combustion bluff body 2 that to entrainment be that high temperature entrainments backflow flue gas district 3, thereby form the relatively-high temperature zone near the steady combustion bluff body 2 of jet expansion 4, for catching fire of coal dust provides high temperature with steady combustion.
In sum, the raising of the present utility model coal burner nozzle with steady combustion ability that catches fire: be provided with steady combustion bluff body 2 in the centre position, end of jet expansion 4, sectional area becomes greatly gradually from inside to outside, and section is isosceles triangle.After the both sides ejection of breeze airflow by steady combustion bluff body 2, air-flow forms and entrainments the burner hearth high-temperature flue gas in the rear formation negative pressure of steady combustion bluff body 2, thereby forms the relatively-high temperature zone near the steady combustion bluff body 2 of jet expansion 4, for catching fire of coal dust provides high temperature with steady combustion; Middle part in the both sides of steady combustion bluff body 2 arranges steady combustion tooth 1, and the part breeze airflow is subjected to surely to fire stopping of tooth 1, and 1 place forms flow-disturbing at steady combustion tooth, has increased near the time of staying of coal dust steady combustion tooth 1, all is conducive to catching fire and steady combustion of coal dust.
It will be apparent to those skilled in the art that raising of the present utility model is caught fire comprises any combination of each several part in this specification with the coal burner nozzle of steady combustion ability.As space is limited and in order to make specification simple and clear, these combinations not to be introduced one by one in detail at this, but after having seen this specification, the scope of the present utility model that any combination of the each several part that consists of this specification forms is self-evident.
Claims (14)
1. coal burner nozzle, it comprises jet expansion (4) and nozzle chamber, it is characterized in that: the centre position of described jet expansion (4) arranges a steady combustion bluff body (2).
2. coal burner nozzle as claimed in claim 1 is characterized in that: described steady combustion bluff body (2) is vertical taper.
3. coal burner nozzle as claimed in claim 1 or 2, it is characterized in that: described steady combustion bluff body (2) comprises major part and microcephaly.
4. coal burner nozzle as claimed in claim 3, it is characterized in that: the major part of described steady combustion bluff body (2) is placed in nozzle chamber.
5. coal burner nozzle as claimed in claim 3, it is characterized in that: the microcephaly of described steady combustion bluff body (2) is placed in jet expansion (4) and locates.
6. coal burner nozzle as claimed in claim 1 or 2, it is characterized in that: the vertical cross section of described steady combustion bluff body (2) is isosceles triangle.
7. coal burner nozzle as claimed in claim 3, it is characterized in that: the vertical cross section of described steady combustion bluff body (2) is isosceles triangle.
8. coal burner nozzle as claimed in claim 1 or 2, it is characterized in that: the middle part of the both sides of described steady combustion bluff body (2) is equipped with steady combustion tooth (1).
9. coal burner nozzle as claimed in claim 3, it is characterized in that: the middle part of the both sides of described steady combustion bluff body (2) is equipped with steady combustion tooth (1).
10. coal burner nozzle as claimed in claim 1 or 2, is characterized in that: described steady combustion bluff body (2) aluminium Alloys Casting.
11. coal burner nozzle as claimed in claim 1 or 2 is characterized in that: described steady combustion bluff body (2) is selected the steel panel beating.
12. coal burner nozzle as claimed in claim 8 is characterized in that: described steady combustion tooth (1) is the horizontal stand stepwise.
13. coal burner nozzle as claimed in claim 9 is characterized in that: described steady combustion tooth (1) is the horizontal stand stepwise.
14. coal burner nozzle as claimed in claim 1 is characterized in that: the port of described jet expansion (4) is that high temperature entrainments backflow flue gas district (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203035677U CN203286563U (en) | 2013-05-30 | 2013-05-30 | Coal power burner nozzle capable of improving ignition and burning stabilization capacities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203035677U CN203286563U (en) | 2013-05-30 | 2013-05-30 | Coal power burner nozzle capable of improving ignition and burning stabilization capacities |
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| Publication Number | Publication Date |
|---|---|
| CN203286563U true CN203286563U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203035677U Expired - Lifetime CN203286563U (en) | 2013-05-30 | 2013-05-30 | Coal power burner nozzle capable of improving ignition and burning stabilization capacities |
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| CN (1) | CN203286563U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339788A (en) * | 2021-06-10 | 2021-09-03 | 国家电网有限公司 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
-
2013
- 2013-05-30 CN CN2013203035677U patent/CN203286563U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339788A (en) * | 2021-06-10 | 2021-09-03 | 国家电网有限公司 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |