CN201944836U - Stable-combusting environment-friendly direct current pulverized coal burner - Google Patents
Stable-combusting environment-friendly direct current pulverized coal burner Download PDFInfo
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- CN201944836U CN201944836U CN2011200096203U CN201120009620U CN201944836U CN 201944836 U CN201944836 U CN 201944836U CN 2011200096203 U CN2011200096203 U CN 2011200096203U CN 201120009620 U CN201120009620 U CN 201120009620U CN 201944836 U CN201944836 U CN 201944836U
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- coal
- pulverized coal
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- air duct
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Abstract
The utility model discloses a stable-combusting environment-friendly direct current pulverized coal burner relates to the field of combustion technologies. A primary air pipe is connected with a primary air duct of pulverized coal airflow in a boiler, a primary pulverized coal separation block, a secondary pulverized coal separation block and a pulverized coal diversion plate are arranged in the primary air duct, the secondary pulverized coal separation block is connected with the pulverized coal diversion plate, a box body is connected with the primary air duct, a pulverized coal concentration sheet, a first partition plate and a second partition plate are arranged in the box body, the pulverized coal concentration sheet is obliquely arranged on the front sides of the first partition plate and the second partition plate, a concentrated pulverized coal nozzle and a diluted pulverized coal nozzle are arranged at the back end of the box body, a secondary air nozzle is connected with a secondary air duct, a secondary air regulating valve is mounted in the secondary air duct, and an oil gun is arranged between the first partition plate and the second partition plate through an oil gun sleeve. The direct current pulverized coal burner has better coal type adaptability and load adaptability, and can ensure the stable combustion and low-pollution combustion within wider coal type and load ranges.
Description
Technical field:
The utility model relates to field of combustion technology, is specifically related to the straight-through pulverized coal burner of a kind of steady combustion, environmental protection.
Background technology:
Coal is the main energy sources of China, and coal accounts for more than 70 percent of China's energy demand total amount at present.Present coal supply anxiety, the medium of steam coal be difficult to guarantee that coal changes greatly, along with coal is constantly exploited medium and is continuous downward trend.Cause combustion instability when boiler at low load on the one hand, need to throw great amount of fuel oil, ash erosion and high temperature corrosion phenomenon happen occasionally when the boiler high load capacity on the other hand, have a strong impact on the safety and economic operation of boiler.Country is more and more stricter to environmental requirement in addition, requires the NOx discharge capacity of coal burner to reduce.Though present many turbulent burners are all right to bituminous coal, the contour volatility coal of brown coal combustion case, to low volatility coals such as meager coal, anthracite catch fire and low load stable combustion all undesirable, need to drop into great amount of fuel oil.
The utility model content:
The purpose of this utility model provides the straight-through pulverized coal burner of a kind of steady combustion, environmental protection, and it has coal adaptability and load adaptability preferably, can guarantee smooth combustion and combustion with reduced pollutants in the coal of broad, load range.
In order to solve the existing problem of background technology, the utility model is by the following technical solutions: it comprises airduct 1, one-level coal dust explant 2, secondary coal dust explant 3, coal dust deflector 4, casing 5, Pulverized Coal Concentration sheet 6, oil gun sleeve pipe 7, first dividing plate 8, second partition 9, thick coal culm spout 10, thin powdered coal spout 11, overfire air port 12, secondary wind adjustment doors 13, secondary air duct 14, oil gun 15; One time airduct 1 is connected with an air channel of boiler coal-ash air-flow, one-level coal dust explant 2, secondary coal dust explant 3 and coal dust deflector 4 are arranged in airduct 1, and secondary coal dust explant 3 is connected with coal dust deflector 4, casing 5 links to each other with an airduct 1, the Pulverized Coal Concentration sheet 6 and first dividing plate 8, second partition 9 is arranged in the casing 5, and Pulverized Coal Concentration sheet 6 is obliquely installed in first dividing plate 8 and second partition 9 front sides, thick coal culm spout 10 and thin powdered coal spout 11 are provided with the rear end of casing 5, overfire air port 12 is connected with secondary air duct 14, secondary wind adjustment doors 13 is installed in the secondary air duct 14, and oil gun 15 is arranged between first dividing plate 8 and the second partition 9 by oil gun sleeve pipe 7.
Described one-level coal dust explant 2 and secondary coal dust explant 3 can be arranged to move adjustable.
Described Pulverized Coal Concentration sheet 6 is the 1-3 sheet.
Described oil gun 15 can be set as activity, pullable.
Described thick coal culm spout 10 and thin powdered coal spout 11 can form angle, and angle is the 0-20 degree.
Described secondary air duct 14 is the 0-20 degree with the angle of thin powdered coal spout 11.
The utlity model has following beneficial effect: coal adaptability and load adaptability are preferably arranged, can smooth combustion when underload, saving great amount of fuel oil when igniting and underload.The discharging that this burner has lower minimizing NOx can realize combustion with reduced pollutants, reaches environmental requirement.The simultaneously meager coal of this burner incendivity low-volatile and anthracite etc. can and become under the coal situation smooth combustion and prevent the boiler water wall coking and the high temperature corrosion phenomenon at various operating conditions.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
The specific embodiment:
Referring to Fig. 1, this specific embodiment by the following technical solutions: it comprises airduct 1, one-level coal dust explant 2, secondary coal dust explant 3, coal dust deflector 4, casing 5, Pulverized Coal Concentration sheet 6, oil gun sleeve pipe 7, first dividing plate 8, second partition 9, thick coal culm spout 10, thin powdered coal spout 11, overfire air port 12, secondary wind adjustment doors 13, secondary air duct 14, oil gun 15; One time airduct 1 is connected with an air channel of boiler coal-ash air-flow, one-level coal dust explant 2, secondary coal dust explant 3 and coal dust deflector 4 are arranged in airduct 1, and secondary coal dust explant 3 is connected with coal dust deflector 4, casing 5 links to each other with an airduct 1, the Pulverized Coal Concentration sheet 6 and first dividing plate 8, second partition 9 is arranged in the casing 5, and Pulverized Coal Concentration sheet 6 is obliquely installed in first dividing plate 8 and second partition 9 front sides, thick coal culm spout 10 and thin powdered coal spout 11 are provided with the rear end of casing 5, overfire air port 12 is connected with secondary air duct 14, secondary wind adjustment doors 13 is installed in the secondary air duct 14, and oil gun 15 is arranged between first dividing plate 8 and the second partition 9 by oil gun sleeve pipe 7.
Described one-level coal dust explant 2 and secondary coal dust explant 3 can be arranged to move adjustable.
Described Pulverized Coal Concentration sheet 6 is the 1-3 sheet.
Described oil gun 15 can be set as activity, pullable.
Described thick coal culm spout 10 and thin powdered coal spout 11 can form angle, and angle is the 0-20 degree.
Described secondary air duct 14 is the 0-20 degree with the angle of thin powdered coal spout 11.
The course of work: when a general mood stream that carries coal dust passes through burner, at first pass through one-level coal dust explant 2 and secondary coal dust explant 3, be separated into dense, light two strands of air-flows, the thin powdered coal air communication is crossed coal dust deflector 4, enter thin powdered coal spout 11. thick coal culm air communication through casing 5 and cross coal gas deflector 4, enter thick coal culm spout 10 through casing 5.When wherein the thick coal culm air communication is crossed coal gas deflector 4 and is entered casing 5, further concentrate through Pulverized Coal Concentration sheet 6, denseer part enters between first dividing plate 8 and the second partition 9, and oil gun 15 stretches into the thick coal culm district between two dividing plates, can put oil combustion gun when igniting and underload.
Breeze airflow is divided into deep or light two strands of breeze airflows by one-level coal dust explant 2, secondary coal dust explant 3 and coal dust deflector 4, wherein the thick coal culm air-flow is divided into big or small two parts through Pulverized Coal Concentration sheet 6 again, what oil gun 15 was lighted is shallow bid thick coal culm part between two dividing plates, local concentration can increase by 24 times, so be easy to catch fire, when catching fire, can save great amount of fuel oil with underrun.And coal dust burns under the hypoxemia reducing atmosphere and can control the NOx generation, reduces the NOx discharging.
The thick coal culm air-flow sprays into burner hearth from thick coal culm spout 10 in the side of waring oneself in front of a fire, the thin powdered coal air-flow from thick coal culm spout angle be that α (0---20 °) thin powdered coal spout 11 sprays into burner hearth, secondary wind from thin powdered coal spout angle be that the overfire air port 12 of β (0---20 °) sprays into burner hearth.Because thick coal culm spout 10, thin powdered coal spout 11, overfire air port 12 are arranged to back-fire side from the side of waring oneself in front of a fire successively, so the flame in the burner hearth forms thick coal culm flame, thin powdered coal flame, secondary wind surrounding layer from inside to outside.This has just formed blast changeable coal burning method.
Because coal powder density height in the thick coal culm air-flow, coal dust is in the reducing atmosphere of rich fuel hypoxemia, and this has just suppressed the growing amount of NOx greatly, therefore can reduce the discharge capacity of NOx in a large number.
After thick coal culm catches fire, in time sneak into by the thin powdered coal air-flow that thin powdered coal spout 11 sprays into, replenish coal dust firing requisite oxygen amount, secondary wind is sprayed into by overfire air port 12, and further delivery of supplemental oxygen amount is because the secondary wind speed degree is big, good rigidly can be strengthened the later stage and mix, prolong the coal dust time of staying, guarantee the abundant after-flame of coal dust, improve efficiency of combustion.
Most of coal dust sprays into burner hearth by thick coal culm spout 10, concentrate on central burner, thin powdered coal air-flow and secondary wind spray into burner hearth at the back-fire side of thick coal culm air-flow, the thick coal culm air-flow flame of rich fuel is wrapped in inside, can reduce pulverized coal particle, carbon granules, soot particle and drop on the chance on the water-cooling wall, therefore can avoid taking place serious slagging scorification phenomenon.Simultaneously because near the water-cooling wall of burner is an oxidizing atmosphere on every side, even the higher coal of combustion of sulfur amount also can prevent water-cooling wall generation high temperature corrosion phenomenon.
This specific embodiment has coal adaptability and load adaptability preferably, can smooth combustion when underload, and saving great amount of fuel oil when igniting and underload.The discharging that this burner has lower minimizing NOx can realize combustion with reduced pollutants, reaches environmental requirement.The simultaneously meager coal of this burner incendivity low-volatile and anthracite etc. can and become under the coal situation smooth combustion and prevent the boiler water wall coking and the high temperature corrosion phenomenon at various operating conditions.
Claims (6)
1. the straight-through pulverized coal burner of a steady combustion, environmental protection is characterized in that it comprises an airduct (1), one-level coal dust explant (2), secondary coal dust explant (3), coal dust deflector (4), casing (5), Pulverized Coal Concentration sheet (6), oil gun sleeve pipe (7), first dividing plate (8), second partition (9), thick coal culm spout (10), thin powdered coal spout (11), overfire air port (12), secondary wind adjustment doors (13), secondary air duct (14), oil gun (15); An airduct (1) is connected with an air channel of boiler coal-ash air-flow, one-level coal dust explant (2), secondary coal dust explant (3) and coal dust deflector (4) are arranged in the airduct (1), and secondary coal dust explant (3) is connected with coal dust deflector (4), casing (5) links to each other with an airduct (1), Pulverized Coal Concentration sheet (6) and first dividing plate (8), second partition (9) is arranged in the casing (5), and Pulverized Coal Concentration sheet (6) is obliquely installed in first dividing plate (8) and second partition (9) front side, thick coal culm spout (10) and thin powdered coal spout (11) are provided with the rear end of casing (5), overfire air port (12) is connected with secondary air duct (14), secondary wind adjustment doors (13) is installed in the secondary air duct (14), and oil gun (15) is arranged between first dividing plate (8) and the second partition (9) by oil gun sleeve pipe (7).
2. the straight-through pulverized coal burner of a kind of steady combustion according to claim 1, environmental protection is characterized in that described one-level coal dust explant (2) and secondary coal dust explant (3) are removable adjustable explant.
3. the straight-through pulverized coal burner of a kind of steady combustion according to claim 1, environmental protection is characterized in that described Pulverized Coal Concentration sheet (6) is the 1-3 sheet.
4. the straight-through pulverized coal burner of a kind of steady combustion according to claim 1, environmental protection is characterized in that described oil gun (15) is for movable, pullable.
5. the straight-through pulverized coal burner of a kind of steady combustion according to claim 1, environmental protection is characterized in that described thick coal culm spout (10) and thin powdered coal spout (11) form angle, and angle is the 0-20 degree.
6. the straight-through pulverized coal burner of a kind of steady combustion according to claim 1, environmental protection is characterized in that the described secondary air duct (14) and the angle of thin powdered coal spout (11) are the 0-20 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200096203U CN201944836U (en) | 2011-01-13 | 2011-01-13 | Stable-combusting environment-friendly direct current pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200096203U CN201944836U (en) | 2011-01-13 | 2011-01-13 | Stable-combusting environment-friendly direct current pulverized coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944836U true CN201944836U (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200096203U Expired - Fee Related CN201944836U (en) | 2011-01-13 | 2011-01-13 | Stable-combusting environment-friendly direct current pulverized coal burner |
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| CN (1) | CN201944836U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997232A (en) * | 2012-12-26 | 2013-03-27 | 内蒙古科技大学 | Anti-coking type direct current pulverized coal burner |
| CN108413386A (en) * | 2018-02-11 | 2018-08-17 | 中国神华能源股份有限公司 | Burner nozzle and buner system |
| CN112228868A (en) * | 2020-08-20 | 2021-01-15 | 陕西商洛发电有限公司 | Horizontal dense-dilute pulverized coal burner capable of simultaneously adjusting primary air flow velocity and side air flow velocity |
-
2011
- 2011-01-13 CN CN2011200096203U patent/CN201944836U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997232A (en) * | 2012-12-26 | 2013-03-27 | 内蒙古科技大学 | Anti-coking type direct current pulverized coal burner |
| CN108413386A (en) * | 2018-02-11 | 2018-08-17 | 中国神华能源股份有限公司 | Burner nozzle and buner system |
| CN108413386B (en) * | 2018-02-11 | 2019-10-15 | 中国神华能源股份有限公司 | Burner nozzle and buner system |
| CN112228868A (en) * | 2020-08-20 | 2021-01-15 | 陕西商洛发电有限公司 | Horizontal dense-dilute pulverized coal burner capable of simultaneously adjusting primary air flow velocity and side air flow velocity |
| CN112228868B (en) * | 2020-08-20 | 2023-04-28 | 陕西商洛发电有限公司 | Horizontal thick and thin pulverized coal burner capable of simultaneously adjusting flow velocity of primary air and side air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20160113 |