CN202835346U - Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere - Google Patents
Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere Download PDFInfo
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- CN202835346U CN202835346U CN 201220422167 CN201220422167U CN202835346U CN 202835346 U CN202835346 U CN 202835346U CN 201220422167 CN201220422167 CN 201220422167 CN 201220422167 U CN201220422167 U CN 201220422167U CN 202835346 U CN202835346 U CN 202835346U
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- eddy flow
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Abstract
The utility model discloses a burning denitration burner installed in a cement decomposing furnace under a lean oxygen atmosphere. The burning denitration burner installed in the cement decomposing furnace under the lean oxygen atmosphere is composed of three channels which are respectively two inner coal air tunnels and a swirl air channel arranged on the most outer layer, and adjustable swirl blades distributed evenly are arranged in the swirl air channel. By the adjustment of the angle and the swirl air quantity of each of the adjustable swirl blades and the changing of the coal air ratio in the two coal air tunnels, the coal air mixing condition in the cement decomposing furnace is enabled to be changed, mixing strength is strengthened, and a burning reaction is impelled to occur under the lean oxygen condition. Due to the high burning temperature in the cement decomposing furnace, the heating and decomposing processes of raw material is guaranteed and is not affected under the lean oxygen condition, not only is the production quantity of fuel type nitrous oxides reduced, but also the surrounding air quality of a cement plant is improved, and sewage charge and operation cost of the whole cement plant; and meanwhile, the scouring and abrasion strength from dust to furnace walls and the burner is reduced, and the service life of equipment is prolonged.
Description
Technical field
The utility model relates to field of environmental engineering, is specifically related to remove in a kind of coal dust firing the burner of nitrogen oxide, relates in particular to a kind of burner that is installed on the denitration of burning under the oxygen-lean atmosphere in the cement decomposing furnace.
Background technology
At present, used burner all is to carry out the burning of coal dust and heating and the decomposition of raw material at excess air coefficient (ratio of the air capacity of effective supply and theoretical air requirement when being fuel combustion) in greater than 1 situation in the dore furnace of cement plant, and the combustion reference temperature in the dore furnace is generally 900～980 ℃, in the situation that excess air coefficient can produce more fuel NO greater than 1, so that the discharged nitrous oxides in cement plant is not up to standard, increase the charges for disposing pollutants in cement plant, also increased the operating cost in whole cement plant simultaneously.In addition, also can increase dust in the dore furnace when air quantity is large to the washing away with wearing and tearing and to the wearing and tearing of burner of furnace wall, thereby reduce the service life of equipment.
Used burner comprises igniter in domestic some cement plant dore furnace at present, namely at the place, air channel, center (being the second coal wind duct 2 inside among Fig. 1) of burner torch oil gun is set, its effect is to provide a combustion-supporting condition for the coal dust that sprays in the dore furnace.The existence of igniter makes device structure complicated, and manufacturing cost is also higher.Traditional cement kiln is at first lighted main oil gun and is heated to burner hearth when starting, and treats to drop into when fire box temperature reaches uniform temperature coal dust again and continues increasing temperature and pressure, just can remove main oil gun until the kiln load reaches 60% when above; Also must drop into the smooth combustion of the combustion-supporting guarantee kiln of main oil gun during the kiln underrun.Compare with the burner that does not have igniter, compact with the burner structure of igniter, the center caliber is larger, and will consume the used oil of igniting; In addition, also can bring the series of problems that torch oil gun when igniting occur, such as igniting whether surely combustion, oil firing not exclusively, the phenomenons such as furnace puff, oil dripping and burner hearth coking.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of burner for coal dust firing denitration under the cement decomposing furnace oxygen-lean atmosphere, solve and use excess air coefficient more greater than the fuel NO that the burner that burns under 1 condition produces in cement decomposing furnace, so that the cement plant discharged nitrous oxides is not up to standard, higher cement plant charges for disposing pollutants and the operating cost in whole cement plant; Increase dust in the dore furnace to the washing away with wearing and tearing and to the wearing and tearing of burner of furnace wall, thereby reduced the problems such as service life of equipment.
For solving the problems of the technologies described above, the utility model provides a kind of burner that is installed on the denitration of burning under the oxygen-lean atmosphere in the cement decomposing furnace, this burner is comprised of three passages, respectively two coal wind ducts and an eddy flow wind passage, wherein eddy flow wind passage is at the outermost layer of burner, adjustable eddy flow blade is set in this air channel, and two coal wind ducts are two-layer in the inside of burner respectively.
The medium that described two coal wind ducts spray into all is mixtures of coal dust and air, and what take is the direct current spray regime; And the medium that eddy flow wind passage passes into is air, and what take is the swirl injection mode.
Be provided with several adjustable eddy flow blades in the described eddy flow wind passage, these several adjustable eddy flow blade is uniformly distributed in the eddy flow wind passage, and its quantity depends on the requirement that mixes of coal dust with air required in eddy flow air quantity that eddy flow wind passage sprays into and the dore furnace thereof.Preferably, the quantity of described adjustable eddy flow blade is 4.
Angle and eddy flow air quantity by regulating adjustable eddy flow blade and change two coal dusts in the coal wind duct and AIR Proportional and change the situation of mixing that enters coal dust and air in the cement decomposing furnace, strengthen the mixing dynamics, impel combustion reaction under the oxygen deprivation condition, to occur.Described eddy flow air quantity is lower than half of whole burner total blast volume; The ratio of coal dust and air is at 1.5kg coal dust/1m in described two coal wind ducts
3Air～3kg coal dust/1m
3Regulate in the air scope; The angle of described adjustable eddy flow blade is regulated in 7 °～100 ° scopes.
Compared with prior art, the beneficial effects of the utility model are:
1, burner of the present utility model, when guaranteeing the normal combustion of coal dust in the cement decomposing furnace and raw material decomposable process, combustion reaction occurs under oxygen-lean atmosphere, has reduced operating cost;
2, the fuel NO that generates behind combustion with meagre oxygen of the coal dust of burner ejection has had obvious reduction, thereby reduced the discharge capacity of cement plant fuel NO, not only improve the air quality of cement plant periphery, but also reduced the charges for disposing pollutants in cement plant;
3, reduced dust during combustion with meagre oxygen the furnace wall of cement decomposing furnace and burner washed away and the wearing and tearing dynamics service life of having improved equipment.
4, because the temperature in the cement decomposing furnace is higher, can get up by automatic combustion when pulverized coal injection is entered, therefore burner of the present utility model need not igniter, device structure is simple, has reduced manufacturing cost.In addition, the burner that does not have igniter for the utility model, when coal dust sprays into the cement decomposing furnace of high temperature, coal dust can get up by automatic combustion, so not only saved the manufacturing cost of burner, also greatly saved the oil mass that igniter will consume, the series of problems that torch oil gun when igniting brings also can not occur in addition, such as igniting whether surely combustion, oil firing not exclusively, the phenomenons such as furnace puff, oil dripping and burner hearth coking.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the vertical section structural map of the utility model burner;
Fig. 2 is the left view of Fig. 1.
Description of reference numerals is as follows among the figure:
1 is the first coal wind duct, and 2 is the second coal wind duct, and 3 is eddy flow wind passage, and 4 is adjustable eddy flow blade.
The specific embodiment
As shown in Figure 1, whole burner of the present utility model does not have igniter, equipment is simple, burner of the present utility model is comprised of three passages, wherein, it is two-layer that the first coal wind duct 1 and the second coal wind duct 2 are positioned at the inside of burner, and the second coal wind duct 2 is inner most one decks, and eddy flow wind passage 3 is positioned at outermost layer.Because the temperature in the cement decomposing furnace is higher, can get up by automatic combustion when pulverized coal injection is entered, therefore this burner need not igniter, device structure is simple, has reduced manufacturing cost.The medium that the first coal wind duct 1 and the second coal wind duct 2 spray into comprises two kinds of coal dust and air, all are mixtures of coal dust and air, what take is the direct current spray regime, and the medium that eddy flow wind passage 3 passes into is air, what take is the swirl injection mode, is provided with adjustable eddy flow blade 4 in this passage.Under the certain prerequisite of the total blast volume that three passages pass into, the excursion of the eddy flow air quantity that eddy flow wind passage 3 sprays into will be lower than half of whole burner total blast volume, and the coal wind ratio (ratio of coal dust and air) of the first coal wind duct 1 and the second coal wind duct 2 all can be at 1.5kg coal dust/1m
3Air～3kg coal dust/1m
3Regulate in the air scope, the angle of adjustable eddy flow blade 4 can be selected in 7 °～100 ° scopes, in general the angle of blade is finely tuned.Be eddy flow air quantity when large, then the used air capacity of the first coal wind duct 1 and the second coal wind duct 2 is also with regard to corresponding minimizing, thereby so that coal wind ratio increase to some extent; Can change the swirl strength that enters eddy flow wind in the dore furnace by the angle of regulating adjustable eddy flow blade 4, thereby affect the situation of mixing of coal dust and air.Therefore angle and eddy flow air quantity by changing adjustable eddy flow blade 4 and change the first coal wind duct 1 and the second coal wind duct 2 in coal wind (coal dust and air) ratio change the coal wind that enters in the cement decomposing furnace and mix situation, strengthen the mixing dynamics, the assurance coal dust fully mixes with air, wherein excess air coefficient (ratio of the air capacity of effective supply and theoretical air requirement when being fuel combustion) is lower than 1, so that combustion with meagre oxygen (impelling combustion reaction to occur under the oxygen deprivation condition) occurs in the dore furnace of high temperature the coal dust of this burner ejection.Because the ignition temperature in the cement decomposing furnace is higher, can reach 900～980 ℃ of these scopes, when combustion reaction is carried out under oxygen-lean atmosphere, do not affect heating and the decomposable process of raw material yet, not only reduced the growing amount of the fuel NO of coal dust firing generation, improve the ambient air quality in cement plant, reduce charges for disposing pollutants and the operating cost in whole cement plant; Simultaneously, dust to the furnace wall of dore furnace and burner wash away and the wearing and tearing dynamics has also obtained effectively reducing, thereby improve the service life of equipment.Whole combustion process does not affect heating and the decomposition of raw material in the cement decomposing furnace.
In embodiment illustrated in fig. 2, adjustable eddy flow blade 4 in the eddy flow wind passage 3 is equally distributed (showing 4 adjustable eddy flow blades 4 among Fig. 2), and required coal dust required to increase and decrease with mixing of air in the eddy flow air quantity that the quantity of adjustable eddy flow blade 4 can spray into according to eddy flow wind passage 3 and the dore furnace thereof.
Claims (6)
1. burner that is installed in the cement decomposing furnace burning denitration under the oxygen-lean atmosphere, it is characterized in that: this burner is comprised of following three passages from inside to outside: the second coal wind duct (2), the first coal wind duct (1) and eddy flow wind passage (3) arrange adjustable eddy flow blade (4) in eddy flow wind passage (3).
2. burner according to claim 1, it is characterized in that: the medium that described the second coal wind duct (2), the first coal wind duct (1) spray into all is mixtures of coal dust and air, what take is the direct current spray regime; And the medium that eddy flow wind passage (3) passes into is air, and what take is the swirl injection mode.
3. burner according to claim 1 and 2, it is characterized in that: be provided with several adjustable eddy flow blades (4) in the described eddy flow wind passage (3), described several adjustable eddy flow blades (4) are uniformly distributed in the eddy flow wind passage (3), and its quantity depends on the requirement that mixes of coal dust with air required in eddy flow air quantity that eddy flow wind passage (3) sprays into and the dore furnace thereof.
4. burner according to claim 3, it is characterized in that: angle and the eddy flow air quantity by regulating adjustable eddy flow blade (4) and change coal dust and AIR Proportional in the second coal wind duct (2), the first coal wind duct (1) and change the situation of mixing that enters coal dust and air in the cement decomposing furnace, strengthen the mixing dynamics, impel combustion reaction under the oxygen deprivation condition, to occur.
5. burner according to claim 3, it is characterized in that: the quantity of described adjustable eddy flow blade (4) is 4.
6. burner according to claim 4, it is characterized in that: described eddy flow air quantity is lower than half of whole burner total blast volume; The ratio of coal dust and air is regulated in 1.5kg coal dust/1m3 air～3kg coal dust/1m3 air scope in described the first coal wind duct (1) and the second coal wind duct (2); The angle of described adjustable eddy flow blade (4) is regulated in 7 °～100 ° scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220422167 CN202835346U (en) | 2012-08-23 | 2012-08-23 | Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220422167 CN202835346U (en) | 2012-08-23 | 2012-08-23 | Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202835346U true CN202835346U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220422167 Withdrawn - After Issue CN202835346U (en) | 2012-08-23 | 2012-08-23 | Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere |
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| CN (1) | CN202835346U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809151A (en) * | 2012-08-23 | 2012-12-05 | 上海三融环保工程有限公司 | Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace |
| CN103604122A (en) * | 2013-12-03 | 2014-02-26 | 中建材（合肥）热工装备科技有限公司 | Multichannel pulverized coal burner |
-
2012
- 2012-08-23 CN CN 201220422167 patent/CN202835346U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809151A (en) * | 2012-08-23 | 2012-12-05 | 上海三融环保工程有限公司 | Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace |
| CN102809151B (en) * | 2012-08-23 | 2015-06-10 | 上海三融环保工程有限公司 | Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace |
| CN103604122A (en) * | 2013-12-03 | 2014-02-26 | 中建材（合肥）热工装备科技有限公司 | Multichannel pulverized coal burner |
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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: 20130327 Effective date of abandoning: 20150610 |
|
| RGAV | Abandon patent right to avoid regrant |