CN2039386U - Coal burner with sidewind and deflected secondary wind - Google Patents
Coal burner with sidewind and deflected secondary wind Download PDFInfo
- Publication number
- CN2039386U CN2039386U CN 88207390 CN88207390U CN2039386U CN 2039386 U CN2039386 U CN 2039386U CN 88207390 CN88207390 CN 88207390 CN 88207390 U CN88207390 U CN 88207390U CN 2039386 U CN2039386 U CN 2039386U
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- China
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- wind
- deviation
- air port
- burner
- overfire air
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Abstract
The utility model adopts a secondary wind structure that primary wind is slantwise arranged on a primary wind injection fire facing side; a primary wind injection fire back side is abutted with side edge wind and simultaneously deviates to the direction of the primary wind injection fire facing side, on the basis of a straight-flow combustor which is singly provided with the side edge wind or singly provided with the secondary wind deviating to the primary wind injection fire back side. The combustor adopting the structure has good function on preventing from the combustion of bitumite with a low ash fusing point and strong slagging propensity and the slagging of the pulverized coal boiler with larger volume heat load and cross-section heat load, has stable combustion, and reduces the content of the NO-[x] in fume exhaust.
Description
The utility model relates to the improvement of the straight-through pulverized coal burner that is installed in four jiaos of boiler furnaces, IPC:F23D1/00.
The furnace wall cooling slagging scorification often takes place, thereby boiler can not normally be moved owing to chamber structure, burner structure, the reasons such as coal that use in pulverized-coal fired boiler.The existing coal powder direct supplying burner of four jiaos in burner hearth that is installed in is for preventing slagging scorification on the water-cooling wall in the stove, add a side wind apart from wind snout limit portion certain distance position or separately secondary wind and wind are being had a horizontal sextant angle fiery lateral deviation that supports or opposes to roll over, thereby improve the temperature levels in the contiguous water-cooling wall zone of primary air jet rigidity and reduction and burner, its purpose all be for prevent on the water-cooling wall slagging scorification and reduce discharge fume in NO
XContent.But adopt a kind of in these two kinds of structures separately; for using bituminous coal and the volume heat load pulverized-coal fired boiler bigger than normal that the ash fusion point spy is low, ash deposition propensity is strong; because the protection zone is limit and thereby the swirl strength that improved primary air in the stove has aggravated gas powder separation and adherent; therefore still slagging scorification easily; and cause that easily burner region flame elongates unstable combustion.
The purpose of this utility model provides a kind of follow-on coal burner, the flame jet two side areas of burner ejection is coated by two strands of air streams, can improve the rigidity of a wind and the oxidizing atmosphere degree of flame jet two side areas, the interior primary air swirl strength of stove is slightly weakened, help alleviating the gas powder and separate and adherent trend, thereby reach the purpose that prevents slagging scorification on the water-cooling wall.Because wind of biasing adds side wind and deviation secondary wind Application of composite, make contiguous on the same group mutual injection of wind facies, make wind powder mixture concentrated relatively, improve coal powder density, add upper side edge wind and be close to a timely oxygenating of wind, help catching fire and smooth combustion.Since temperature burning on the low side around oxygen supply and the furnace wall by stages, therefore, to reducing NO in the smoke evacuation
XContent has certain effect.
The purpose of this utility model realizes as follows:
This burner places side one side of waring oneself in front of a fire of a wind snout with a windage yaw, adds a side wind snout of being close to a wind snout at the spout back-fire side, simultaneously, and with the compound installation of deviation secondary wind.Side wind is by in wind passage of an independent pipeline introducing.Adding one in middle two secondary air channels becomes 15 °～25 ° of levels to warm oneself in front of a fire deflector that lateral deviation rolls over or be center line with secondary air channel road central axis of primary air jet with secondary air channel road central axis up and down, can horizontal left-right rotation 25 ° movable deflector, as long as with side wind and deviation secondary wind wind-warm syndrome, air quantity, wind speed, and deviation secondary windage yaw knuckle degree is controlled in the suitable scope and just can reaches the purpose of this utility model.
Concrete structure of the present utility model and working condition are described as follows with two embodiment in conjunction with the accompanying drawings:
Accompanying drawing 2 is to have the fixedly front view of deviation secondary wind one whole group burner.With reference to Fig. 2, (18) are fixed deviation overfire air ports, and other parts are identical with accompanying drawing 1 among this figure.
Accompanying drawing 4 is views that accompanying drawing 1A-A dissects direction.Wherein (8) are the pipelines that is contained in side wind in the airduct road (10), and (9) are the spouts of side wind.
Accompanying drawing 5 is views that accompanying drawing 2C-C dissects direction.Wherein (11) are fixed deflectors, and (12) are the connecting plates of deflector (11), and (13) are secondary air channel roads, middle part.
Accompanying drawing 6 is that accompanying drawing 1B-B dissects the direction view.Wherein (14) are connecting rods, and (15) are liner plates, and (16) are bent axles.
The utility model embodiment one, mainly by the biasing wind snout (1), the side wind snout (2) of being close to a wind snout, fixed deviation overfire air port (18), overfire air port (4) is formed up and down.Burner is installed in four jiaos of Pulverized Coal fired Boiler Furnace, and with reference to figure (3), one time airduct road central axis is (5), and side wind snout central axis is (6), becomes the deviation overfire air port central axis of a horizontal sextant angle to be (7) with an airduct road central axis.Side wind airduct is that a rectangular tube (8) and rectangular jet (9) are integrally welded, is fixed among the airduct road (10).Fixed deviation overfire air port (18) is made up of deflector (11), connecting plate (12).
Embodiment two, the burner remainder is identical with embodiment one, deviation secondary wind is made adjustable deviation overfire air port (3), motion by connecting rod (14) drives bent axle (16) rotation that is contained on the liner plate (15), makes the deflector (17) that is connected with bent axle 25 ° of horizontal left-right rotation.Embodiment two makes the angle of deviation secondary wind jet that certain adjustable range be arranged, thereby constitutes different flow field structures owing to adopted the structure of the adjustable deviation secondary of level wind.According to different bituminous coal coal, the type of furnaces, can select the deviation secondary wind flow angle that suits, it has the bigger scope of application to coal, the type of furnace than embodiment one.
In design, should guarantee that a wind outlet wind speed is 20～25 meter per seconds, overfire air port outlet wind speed is 35～45 meter per seconds up and down, wind-warm syndrome is 280 ℃～320 ℃, deviation overfire air port outlet wind speed 30～40 meter per seconds, wind-warm syndrome is 280 ℃～320 ℃, air quantity is 15～25% of a total blast volume.Side wind snout outlet wind speed is 40～70 meter per seconds, and wind-warm syndrome is 130 ℃～180 ℃, and air quantity is 10～20% of a total blast volume.
All spout all adopts common heat resisting steel by the furnace interior branch, and remainder all adopts common straightcarbon steel.
When burner that adopts said structure and following condition, draw comparatively ideal result.
Using coal is bituminous coal (V
r＞20%, ash deposition propensity is strong, ash fusion point t
1～t
3Be 1059 ℃～1168 ℃), volume heat load Q/V=68 * 10
3Kilojoule/rice
3The time rated capacity be 200 tons/time, high-temperature high-pressure boiler is used this type burner, a wind snout (1) outlet wind speed 25 meter per seconds, overfire air port (4) exports wind speed 45 meter per seconds up and down, deviation overfire air port (18) outlet wind speed 35 meter per seconds, side wind snout (2) outlet wind speed 50 meter per seconds, used 4200 hours continuously, water-cooling wall never has obvious slagging scorification in the stove, solved the long-standing serious slagging scorification overtemperature problem of this stove, make this stove rate of load condensate improve 35%, the stove internal combustion is stable, NO in the smoke evacuation
XContent has descended 25%.Adding the structure that side wind or an independent wind adds deviation secondary wind with an existing or independent wind compares, since the utility model adopted wind add side wind and with the compound version of deviation secondary wind, for solution uses the strong bituminous coal of ash deposition propensity, and volume heat load boiler scaling problem bigger than normal provides new technological means.Because this burner structure is very simple, the boiler improvement that is specially adapted to move.
Claims (4)
1, pulverized bituminous coal DC burner, it is characterized in that this burner is by a wind snout [1], side wind snout [2], deviation overfire air port [3] or [18], overfire air port [4] compound composition up and down, and a wind snout [1] is offset to the primary air jet side of waring oneself in front of a fire, side wind snout [2] is loaded on a wind snout [1] back-fire side, and the center line of deviation overfire air port [3] or [18] has a horizontal sextant angle with overfire air port [4] central axis up and down.
2, burner according to claim 1 is characterized in that deviation overfire air port (18) is made up of the fixed deflector (11) of 15 °～25 ° of the side direction deviations of waring oneself in front of a fire to primary air jet and the connecting plate (12) of deflector.
3, burner according to claim 1 is characterized in that deviation overfire air port (3) can level be rotated 25 ° adjusting parts with overfire air port central axis up and down to the left and right by center line and formed by what connecting rod (14), liner plate (15), bent axle (16), adjustable deflector (17) were formed.
4, burner according to claim 1 is characterized in that side wind snout (2), and independently a pipeline (8) and integrally welded with it spout (9) are formed by being installed in the air channel (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88207390 CN2039386U (en) | 1988-06-17 | 1988-06-17 | Coal burner with sidewind and deflected secondary wind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88207390 CN2039386U (en) | 1988-06-17 | 1988-06-17 | Coal burner with sidewind and deflected secondary wind |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2039386U true CN2039386U (en) | 1989-06-14 |
Family
ID=4841421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88207390 Withdrawn CN2039386U (en) | 1988-06-17 | 1988-06-17 | Coal burner with sidewind and deflected secondary wind |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2039386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427824C (en) * | 2005-12-23 | 2008-10-22 | 浙江大学 | Adjacent angle displacement direct burner system |
| CN103672864A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Upper-lower concentrated-diluted pulverized-coal burning device |
-
1988
- 1988-06-17 CN CN 88207390 patent/CN2039386U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427824C (en) * | 2005-12-23 | 2008-10-22 | 浙江大学 | Adjacent angle displacement direct burner system |
| CN103672864A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Upper-lower concentrated-diluted pulverized-coal burning device |
| CN103672864B (en) * | 2013-12-31 | 2016-05-11 | 北京国电龙高科环境工程技术有限公司 | A kind of upper and lower gradation coal burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |