CN202546752U - Central diffusion type micro oil ignition burner - Google Patents
Central diffusion type micro oil ignition burner Download PDFInfo
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- CN202546752U CN202546752U CN2012200650699U CN201220065069U CN202546752U CN 202546752 U CN202546752 U CN 202546752U CN 2012200650699 U CN2012200650699 U CN 2012200650699U CN 201220065069 U CN201220065069 U CN 201220065069U CN 202546752 U CN202546752 U CN 202546752U
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- airduct
- pulverized coal
- bluff body
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- flame
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Abstract
The utility model discloses a central diffusion type micro oil ignition burner, wherein an inner primary air pipe is installed in a main primary air pipe; one section of the main primary air pipe extends into a three-stage coal dust combustion chamber; a coal dust concentration cone and a controllable vortex expansion flame blunt body are coaxially arranged in sequence along the flowing direction of fluid in the inner primary air pipe assembled in the other section of the main primary air pipe; the small section of an L-shaped ignition oil gun in an anti-abrasion sleeve is aligned to the conical part of the controllable vortex expansion flame blunt body; the small section of an L-shaped air inlet pipe is aligned to the bottom end of the controllable vortex expansion flame blunt body which is hollow; air outlets are uniformly distributed at the bottom end of the small section of the L-shaped air inlet pipe along the circumferential direction; and a plurality of equal circular secondary air inlets are formed at the non-open end face of the three-stage coal dust combustion chamber. According to the utility model, because high-temperature flame sprayed by the ignition oil gun is sprayed on the expansion flame blunt body and diffused to the wall surface of a circular pipe along the outer edge of the blunt body in an inclined manner, and thus the annular surface type ignition is realized; the ignition efficiency is greatly increased; in addition, the controllable vortex expansion flame blunt body is capable of controlling the size of a high-temperature backflow area formed at the outlet of a first-stage combustion chamber, the fuel adaptability can be increased.
Description
Technical field
The utility model relates to a kind of coal burner, especially relates to a kind of center diffusion type little oil burner.
Background technology
The conventional method of heat power station boiler startup and low-load combustion-stabilizing is to adopt big oil gun to throw oily radiator, combustion-supporting mode.Different according to the type of furnace, the boiler cold-state startup needs to drop into fuel oil 50～200T throw the coal dust on-load from lighting a fire to during.And adopt the tiny-oil ignition combustion supporting technology, according to the principle that energy amplifies step by step, available high energy oil gun is directly lighted a small amount of coal dust, lights more coal dust then step by step; Thereby realize using when the boiler black furnace starts the oil of trace can realize ignition of the boiler, and when blowing out, underload and ultra-low load steady combustion, stablize boiler combustion with the oil of trace, according to the difference of coal, oil-saving effect generally can reach 60～98%.At present, China has obtained considerable achievement in the tiny-oil ignition technical field, has accumulated rich experience.Chinese patent ZL03255982.8, ZL200520145352.2, ZL200710156019.5 etc. have announced several kinds of multi-form little oil burners, and these burners are realizing aspect tiny-oil ignition and the low-load combustion-stabilizing strong point separately being arranged all; But the oil gun arrangement that such burner adopted makes thermal-flame heat the heating or the single-point of coal dust, or the multiple spot heating, and this just causes heat time heating time long, requires the longer dimension of whole coal burner.This is difficult to accomplish for considerable power plant, thereby can cause the reduction of burner outlet coal dust burn-off rate; This just greatly reduces the stability of igniting, even cause can't normal ignition.The little oil burner of the utility model adopts the strategy of " blooming in the center ", has changed igniting theory in the past, makes burner become the igniting of anchor ring formula, has improved ignition effectiveness greatly, has shortened the duration of ignition.
Summary of the invention
The purpose of the utility model is to provide a kind of center diffusion type little oil burner, and it can significantly improve combustion stability, and has good fuel tolerance.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
The utility model comprises a main airduct, an interior airduct, Pulverized Coal Concentration awl, L type torch oil gun, controlled whirlpool expansion flame bluff body and three grades of pulverized coal combustors; An interior airduct is installed in the main airduct; One section of a main airduct is stretched at three grades of coal dust firings indoor; In the interior airduct of installing in another section of a main airduct; Longshore current body flow direction is equipped with the Pulverized Coal Concentration awl successively and the flame bluff body is expanded in controlled whirlpool, and flame bluff body and three grades of coaxial installations of pulverized coal combustor are expanded in a main airduct, an interior airduct, Pulverized Coal Concentration awl, controlled whirlpool; Antiwear casing vertically stretches in a main airduct, the interior airduct; The tapering of flame bluff body is expanded in the controlled whirlpool of the segment coaxial alignment of the L type torch oil gun in the Antiwear casing; The L type blast pipe blast pipe that adds Antiwear casing vertically stretches in a main airduct, the interior airduct; The bottom of flame bluff body is expanded in the controlled whirlpool of the segment coaxial alignment hollow-core construction of L type blast pipe; The bottom that the flame bluff body is expanded in controlled whirlpool along the circumferential direction is being uniformly distributed with exhaust vent, and three grades of pulverized coal combustors are at the end face that is connected with a main airduct, and along the circumferential direction five equilibrium has a plurality of circular secondary wind fresh air inlets.
Described Pulverized Coal Concentration awl radial section is circular, and axial cross section is a half elliptic.
The beneficial effect that the utlity model has is:
The utility model can make at the Pulverized Coal Concentration awl that interior airduct import department is provided with and get into the coal air mixture of managing in wind and concentrate, along on the anchor ring at pipe wall place, enrichment thick coal culm; And the thermal-flame of torch oil gun ejection is sprayed onto the expansion oblique pipe wall place that diffuses to of bluff body outer rim, flame bluff body upper edge; In the whole circumference direction; Carry out strong turbulent matter, heat exchange with the thick coal culm air-flow in the incoming flow, heat coal dust rapidly, and can to a certain degree prolong the time of staying of coal dust; Thereby realized the igniting of anchor ring formula, improved ignition effectiveness greatly; Though flame bluff body size is expanded necessarily in controlled whirlpool, can be through getting into the inner air quantity of bluff body, the circular cone build air curtain size that bluff body is outwards sprayed changes; Objectively be equivalent to be provided with the bluff body of adjustable size, therefore, can control the high temperature recirculation zone size that the one-level combustor exit forms; Like this; Just can be according to coal-fired volatile matter size, the air quantity in the adjustment central air hose reaches the effect that adapts to coal dust firing.In addition, the existence of flame bluff body is expanded in controlled whirlpool, has further prolonged the time of staying of coal dust in burner, improves combustion stability, and high velocity stream has good cooling effect through the air of bluff body to bluff body simultaneously, to guarantee the security of bluff body work.The center diffusion type micro-oil ignition coal powder combusting device that the utility model provides not only can be used as start-up burner, but also can be used as the burner of main burner and low-load combustion-stabilizing.
Description of drawings
Fig. 1 is the structural front view of the center diffusion type little oil burner of the utility model.
Fig. 2 is the structure side view of the center diffusion type little oil burner of the utility model.
Among the figure: airduct in airduct of 1-master, 2-, 3-Pulverized Coal Concentration awl, 3.1-fixing ribs; 3.1-fixing ribs, 4-L type torch oil gun, the 4.1-Antiwear casing, 5-expands the flame bluff body in controlled whirlpool; 5.1-exhaust vent, 5.2-blast pipe, 5.3-fixing ribs, 6-one-level combustion chamber; 7-secondary combustion chamber, 7.1-fixing ribs, three grades of combustion chambers of 8-, 8.1-secondary wind fresh air inlet.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Like Fig. 1, shown in Figure 2, the utility model comprises a main airduct 1, an interior airduct 2, Pulverized Coal Concentration awl 3, L type torch oil gun 4, controlled whirlpool expansion flame bluff body 5 and three grades of pulverized coal combustors 8; An interior airduct 2 is installed in the main airduct 1; One section of a main airduct 1 is stretched in three grades of pulverized coal combustors 8; In the interior airduct of installing in another section of a main airduct 1; Longshore current body flow direction is equipped with Pulverized Coal Concentration awl 3 successively and expands flame bluff body 5 with controlled whirlpool, and flame bluff body 5 and three grades of pulverized coal combustor 8 coaxial installations are expanded in a main airduct 1, an interior airduct 2, Pulverized Coal Concentration awl 3, controlled whirlpool; Antiwear casing 4.1 vertically stretches in a main airduct 1, the interior airduct 2; The tapering of flame bluff body 5 is expanded in the controlled whirlpool of the segment coaxial alignment of the L type torch oil gun 4 in the Antiwear casing 4.1; L type blast pipe 5.2 blast pipes that add Antiwear casing vertically stretch in a main airduct 1, the interior airduct 2; The bottom of flame bluff body 5 is expanded in the controlled whirlpool of the segment coaxial alignment hollow-core construction of L type blast pipe 5.2; The bottom that flame bluff body 5 is expanded in controlled whirlpool along the circumferential direction is being uniformly distributed with exhaust vent 5.1, and angle is greater than angle between bluff body conical surface cycloid and burner main shaft between exhaust vent axis and burner main shaft.Three grades of pulverized coal combustors 8 are at the end face that is connected with a main airduct 1, and along the circumferential direction five equilibrium has a plurality of circular secondary wind fresh air inlets 8.1.
Described Pulverized Coal Concentration is bored 3 radial sections for circular, and axial cross section is a half elliptic, is connected through the three road fixing ribs 3.1 that are distributed in circumferencial direction between Pulverized Coal Concentration awl and the interior airduct; Described controlled whirlpool is expanded between flame bluff body 5 and the interior airduct and is connected through the three road fixing ribs 5.3 that are distributed in circumferencial direction.
An interior airduct 2 is same segment pipe with one-level pulverized coal combustor 6; Be installed in the main airduct 1, connect through the three road fixing ribs 7.1 that are distributed in circumferencial direction therebetween, an interior airduct 2 near the incoming flow end; Pulverized Coal Concentration awl 3 is housed; Its with an interior airduct 2 between be connected through the three road fixing ribs 3.1 that are distributed in circumferencial direction, near being L type torch oil gun 4 after the Pulverized Coal Concentration awl 3, be thereafter that flame bluff body 5 is expanded in controlled whirlpool.A main airduct 1 is same segment pipe with secondary pulverized coal combustor 7, can be regarded as secondary combustion chamber 7 from 6 exits, one-level combustion chamber, and its rear end is stretched in three grades of pulverized coal combustors 8.
Situation is following during the center diffusion type micro-oil ignition coal powder combusting device real work of the utility model:
A wind carries coal dust and gets into main wind passage 1, and wherein a part will get into an interior airduct 2, when boring 3 through Pulverized Coal Concentration; Breeze airflow is radially concentrated to make along on the anchor ring at pipe wall place; Enrichment thick coal culm, according to principle of inertia, when the flow area sudden enlargement of breeze airflow; The thick coal culm air-flow will keep inertia and concentrate entering one-level pulverized coal combustor 6; And the thermal-flame of L type torch oil gun 4 ejection is sprayed onto controlled whirlpool and expands the oblique pipe wall place that diffuses to of flame bluff body 5 upper edge bluff body outer rims, in the whole circumference direction, carries out strong turbulent matter, heat exchange with thick coal culm air-flow in the incoming flow; The heating coal dust makes the rapid fire burns that heating up also of coal dust rapidly; When high-temperature product left the one-level pulverized coal combustor, because the effect of bluff body will make high-temperature flue gas and the deflection of unburned breeze airflow generation umbrella, its effect had three: one, the contact heat transfer process of enhancing and peripheral breeze airflow, and reinforcement is caught fire; The 2nd, prolong the time of staying of coal dust in one-level pulverized coal combustor 6, promote the process of catching fire; The 3rd, form a stable high temperature recirculation zone at the bluff body rear portion, thereby improve the combustion stability of breeze airflow.The angle of the umbrella deflection that air-flow produces can be adjusted through the gas flow in the increase and decrease central air hose; As to the less anthracite that is difficult to catch fire of volatile matter; Can strengthen the gas flow in the central air hose; Thereby entrainment more high-temperature flue gas to form bigger vortex, thereby and make stronger hybrid perturbation and strengthen ignition process.Because the content of a general mood stream air only accounts for 20% ~ 40% of total blast volume; And in the thick coal culm; AIR Proportional is littler, so the indoor further burning that might hinder fuel owing to anoxic of one-level coal dust firing, and this part eddy current wind then can partly remedy this deficiency.The high temperature that gets into secondary pulverized coal combustor 7 will heat and light the residue breeze airflow in the secondary pulverized coal combustor 7; The breeze airflow of being lighted then together gets into three grades of pulverized coal combustors 8; Under the secondary wind action that replenishes, burn away and the afterburnt sprays into burner hearth to a certain extent.The sparking mode of this form has prolonged the time of staying of coal dust to a certain extent, and has realized the igniting of anchor ring formula, has improved ignition effectiveness greatly; Though flame bluff body size is expanded necessarily in controlled whirlpool, can be through getting into the inner air quantity of bluff body, the circular cone build air curtain size that bluff body is outwards sprayed changes; Objectively be equivalent to be provided with the bluff body of adjustable size, therefore, can control the high temperature recirculation zone size that the one-level combustor exit forms; Like this; Just can be according to coal-fired volatile matter size, the air quantity in the adjustment central air hose reaches the effect that adapts to coal dust firing.In addition, the existence of flame bluff body is expanded in controlled whirlpool, has further prolonged the time of staying of coal dust in burner, improves combustion stability, and high velocity stream has good cooling effect through the air of bluff body to bluff body simultaneously.
What more than enumerate only is a specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought the protection domain of the utility model.
Claims (2)
1. a center diffusion type little oil burner is characterized in that: comprise a main airduct (1), an interior airduct (2), Pulverized Coal Concentration awl (3), L type torch oil gun (4), controlled whirlpool expansion flame bluff body (5) and three grades of pulverized coal combustors (8); An interior airduct (2) is installed in the main airduct (1); One section of a main airduct (1) is stretched in three grades of pulverized coal combustors (8); In the interior airduct of installing in another section of a main airduct (1); Pulverized Coal Concentration awl (3) is housed longshore current body flow direction successively and flame bluff body (5) is expanded in controlled whirlpool, and flame bluff body (5) and the coaxial installation of three grades of pulverized coal combustors (8) are expanded in a main airduct (1), an interior airduct (2), Pulverized Coal Concentration awl (3), controlled whirlpool; Antiwear casing (4.1) vertically stretches in a main airduct (1), the interior airduct (2); The tapering of flame bluff body (5) is expanded in the controlled whirlpool of the segment coaxial alignment of the L type torch oil gun (4) in the Antiwear casing (4.1); L type blast pipe (5.2) blast pipe that adds Antiwear casing vertically stretches in a main airduct (1), the interior airduct (2); The bottom of flame bluff body (5) is expanded in the controlled whirlpool of the segment coaxial alignment hollow-core construction of L type blast pipe (5.2); The bottom that flame bluff body (5) is expanded in controlled whirlpool along the circumferential direction is being uniformly distributed with exhaust vent (5.1); Three grades of pulverized coal combustors (8) are at the end face that is connected with a main airduct (1), and along the circumferential direction five equilibrium has a plurality of circular secondary wind fresh air inlets (8.1).
2. a kind of center according to claim 1 diffusion type little oil burner is characterized in that: described Pulverized Coal Concentration awl (3) radial section is for circular, and axial cross section is a half elliptic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200650699U CN202546752U (en) | 2012-02-27 | 2012-02-27 | Central diffusion type micro oil ignition burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200650699U CN202546752U (en) | 2012-02-27 | 2012-02-27 | Central diffusion type micro oil ignition burner |
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| Publication Number | Publication Date |
|---|---|
| CN202546752U true CN202546752U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200650699U Withdrawn - After Issue CN202546752U (en) | 2012-02-27 | 2012-02-27 | Central diffusion type micro oil ignition burner |
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| CN (1) | CN202546752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537951A (en) * | 2012-02-27 | 2012-07-04 | 中国计量学院 | Central diffusion type tiny-oil ignition combustor |
-
2012
- 2012-02-27 CN CN2012200650699U patent/CN202546752U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537951A (en) * | 2012-02-27 | 2012-07-04 | 中国计量学院 | Central diffusion type tiny-oil ignition combustor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121121 Effective date of abandoning: 20131023 |
|
| RGAV | Abandon patent right to avoid regrant |