CN102809151A - Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace - Google Patents
Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace Download PDFInfo
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- CN102809151A CN102809151A CN2012103026235A CN201210302623A CN102809151A CN 102809151 A CN102809151 A CN 102809151A CN 2012103026235 A CN2012103026235 A CN 2012103026235A CN 201210302623 A CN201210302623 A CN 201210302623A CN 102809151 A CN102809151 A CN 102809151A
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Abstract
The invention discloses an oxygen-deficient combustion denitration combustor arranged in a cement decomposing furnace. The combustor consists of three channels which refer to two internal coal air channels and a vortex air channel on the outmost layer respectively, wherein uniformly-distributed adjustable vortex blades are arranged in the vortex air channel. By adjusting the angles and the vortex air volume of the adjustable vortex blades and changing the proportion of coal air in the two coal air channels, the condition of mixing the coal air entering the cement decomposing furnace can be changed, the mixing force can be enhanced, and fuels can be promoted to be subjected to a combustion reaction in the absence of oxygen. The process of heating and decomposing raw materials cannot be influenced in the absence of the oxygen due to relatively high combustion temperatures in the cement decomposing furnace, so that the generation amount of fuel type nitrogen oxides is reduced, the quality of air around a cement plant is improved, and the pollution discharge cost and the operating cost of the whole cement plant are reduced; and simultaneously, the washing and abrading force of dust to the wall of the decomposing furnace and the combustor is reduced, and the service life of the combustor is prolonged.
Description
Technical field
The present invention relates to field of environmental engineering, be specifically related to remove in a kind of coal dust firing the burner of nitrogen oxide, relate 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 the 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) under greater than 1 situation in the dore furnace of cement plant; And the combustion reference temperature in the dore furnace is generally 900～980 ℃; Can produce more fuel NO at excess air coefficient under greater than 1 situation; Make that the discharged nitrous oxides in cement plant is not up to standard, increased 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 big, thereby reduce the service life of equipment the washing away of furnace wall with wearing and tearing and to the wearing and tearing of burner.
Used burner comprises igniter in domestic some cement plant dore furnace at present, promptly at the place, air channel, center (being coal wind duct 2 inside among Fig. 1) of burner torch oil gun is set, and its effect is for the coal dust that sprays in the dore furnace a combustion-supporting condition to be provided.The existence of igniter makes device structure complicated, and manufacturing cost is also higher.The 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 combustion-supporting smooth combustion that could guarantee kiln of main oil gun during the kiln underrun.Compare with the burner that does not have igniter, the burner structure that has igniter is compact, and the center caliber is bigger, and will consume the used oil of igniting; In addition, also can bring a series of problems that torch oil gun when igniting occur, such as igniting whether surely combustion, oil firing not exclusively, phenomenons such as furnace puff, oil dripping and burner hearth coking.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of burner that is used 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; Make the cement plant discharged nitrous oxides not up to standard, the 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 of furnace wall, thereby reduced the problems such as service life of equipment with wearing and tearing and to the wearing and tearing of burner.
For solving the problems of the technologies described above; The present invention 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 made up of three passages, is respectively two coal wind ducts and an eddy flow wind passage, and wherein eddy flow wind passage is at the outermost layer of burner; Adjustable swirl vane is set in this air channel, and two coal wind ducts are two-layer in the inside of burner respectively.
Said two media that coal wind duct sprayed into all are coal dust and AIR MIXTURES, and what take is the direct current spray regime; And the medium that eddy flow wind passage is fed is an air, and what take is the swirl injection mode.
Be provided with several adjustable swirl vanes in the said eddy flow wind passage, these several adjustable swirl vane is uniformly distributed in the eddy flow wind passage, and its quantity depends on required coal dust and Air mixing requirement in eddy flow air quantity that eddy flow wind passage sprays into and the dore furnace thereof.Preferably, the quantity of said adjustable swirl vane is 4.
Angle and eddy flow air quantity through regulating adjustable swirl vane and change two coal dust and AIR Proportional in the coal wind duct and change coal dust and the Air mixing situation in the cement decomposing furnace that get into; Strengthen the mixing dynamics, impel combustion reaction under the oxygen deprivation condition, to take place.Said eddy flow air quantity is lower than the half the of whole burner total blast volume; The ratio of coal dust and air is at 1.5kg coal dust/1m in said two coal wind ducts
3Air～3kg coal dust/1m
3Regulate in the air scope; The angle of said adjustable swirl vane is regulated in 7 °～100 ° scopes.
Compared with prior art, beneficial effect of the present invention is:
1, burner of the present invention, when guaranteeing normal combustion and the raw material decomposable process of coal dust in the cement decomposing furnace, combustion reaction takes place under oxygen-lean atmosphere, has reduced operating cost;
2, the fuel NO that behind combustion with meagre oxygen, generates of the coal dust of burner ejection has had tangible 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 automatic combustion when the coal dust spirt goes, so burner of the present invention need not igniter, device structure is simple, has reduced manufacturing cost.In addition; Do not have the burner of igniter for the present invention, when coal dust sprayed 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 saved greatly igniter the oil mass that will consume, a series of problems of bringing in the time of also can not occurring the torch oil gun igniting in addition, such as igniting whether surely combustion, oil firing not exclusively, phenomenons such as furnace puff, oil dripping and burner hearth coking.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 is the vertical section structural map of burner of the present invention;
Fig. 2 is the left view of Fig. 1.
Description of reference numerals is following among the figure:
1 is coal wind duct, and 2 is coal wind duct, and 3 is eddy flow wind passage, and 4 is adjustable swirl vane.
The specific embodiment
As shown in Figure 1, whole burner of the present invention does not have igniter, and equipment is simple; Burner of the present invention is made up of three passages, and wherein, coal wind duct 1 is two-layer with the inside that coal wind duct 2 is positioned at burner; And 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 automatic combustion when the coal dust spirt goes, so this burner need not igniter, device structure is simple, has reduced manufacturing cost.The medium that coal wind duct 1 and coal wind duct 2 are sprayed into comprises two kinds of coal dust and air; All be coal dust and AIR MIXTURES; What take is the direct current spray regime; And the medium that eddy flow wind passage 3 is fed is an air, and what take is the swirl injection mode, in this passage, is provided with adjustable swirl vane 4.Under the certain prerequisite of the total blast volume that three passages feed; The excursion of the eddy flow air quantity that eddy flow wind passage 3 sprays into will be lower than the half the of whole burner total blast volume, and the coal wind ratio (ratio of coal dust and air) of coal wind duct 1 and 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 swirl vane 4 can be selected in 7 °～100 ° scopes, in general the angle of blade is finely tuned.Be eddy flow air quantity when big, then the used air capacity of coal wind duct 1 and coal wind duct 2 is also with regard to corresponding minimizing, thereby makes coal wind ratio increase to some extent; The swirl strength that gets into eddy flow wind in the dore furnace be can change through the angle of regulating adjustable swirl vane 4, thereby coal dust and Air mixing situation influenced.So change the coal wind mix that gets in the cement decomposing furnace through angle and eddy flow air quantity that changes adjustable swirl vane 4 and coal wind (coal dust and the air) ratio that changes in coal wind duct 1 and the coal wind duct 2; 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, makes the coal dust of this burner ejection that combustion with meagre oxygen (impelling combustion reaction under the oxygen deprivation condition, to take place) take place in the dore furnace of high temperature.Because the ignition temperature in the cement decomposing furnace is higher; Can reach 900～980 ℃ of these scopes; When combustion reaction is carried out, do not influence the heating and the decomposable process of raw material yet under oxygen-lean atmosphere, not only reduced the growing amount of the fuel NO of coal dust firing generation; Improve the ambient air quality in cement plant, reduce the 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 influence the heating and the decomposition of raw material in the cement decomposing furnace.
In embodiment illustrated in fig. 2; Adjustable swirl vane 4 in the eddy flow wind passage 3 is equally distributed (showing 4 adjustable swirl vanes 4 among Fig. 2), and coal dust and Air mixing required in eddy flow air quantity that the quantity of adjustable swirl vane 4 can spray into according to eddy flow wind passage 3 and the dore furnace thereof require to increase and decrease.
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 made up of following three passages from inside to outside: coal wind duct (2), coal wind duct (1) and eddy flow wind passage (3) are provided with adjustable swirl vane (4) in eddy flow wind passage (3).
2. burner according to claim 1 is characterized in that: the medium that said coal wind duct (2), coal wind duct (1) are sprayed into all is coal dust and AIR MIXTURES, and what take is the direct current spray regime; And the medium that eddy flow wind passage (3) is fed is an 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 swirl vanes (4) in the said eddy flow wind passage (3); Said several adjustable swirl vanes (4) are uniformly distributed in the eddy flow wind passage (3), and its quantity depends on required coal dust and Air mixing requirement 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: change coal dust and the Air mixing situation in the cement decomposing furnace that get into through angle and the eddy flow air quantity of regulating adjustable swirl vane (4) and coal dust and the AIR Proportional that changes in coal wind duct (2), the coal wind duct (1); Strengthen the mixing dynamics, impel combustion reaction under the oxygen deprivation condition, to take place.
5. burner according to claim 3 is characterized in that: the quantity of said adjustable swirl vane (4) is 4.
6. burner according to claim 4 is characterized in that: said eddy flow air quantity is lower than the half the of whole burner total blast volume; The ratio of coal dust and air is at 1.5kg coal dust/1m in said coal wind duct (1) and the coal wind duct (2)
3Air～3kg coal dust/1m
3Regulate in the air scope; The angle of said adjustable swirl vane (4) is regulated in 7 °～100 ° scopes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302623.5A CN102809151B (en) | 2012-08-23 | 2012-08-23 | Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210302623.5A CN102809151B (en) | 2012-08-23 | 2012-08-23 | Oxygen-deficient combustion denitration combustor arranged in cement decomposing furnace |
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| CN102809151A true CN102809151A (en) | 2012-12-05 |
| CN102809151B CN102809151B (en) | 2015-06-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953224A (en) * | 2016-06-20 | 2016-09-21 | 上海三融环保工程有限公司 | Saturated steam catalytic burner used for cement decomposition furnace |
| CN111578270A (en) * | 2020-05-26 | 2020-08-25 | 中材海外工程有限公司 | Low-nitrogen combustion device for cement kiln tail |
| CN113277760A (en) * | 2021-06-30 | 2021-08-20 | 崇左南方水泥有限公司 | Method and system for cooperatively treating electrolytic manganese slag in cement kiln |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201215311Y (en) * | 2008-04-30 | 2009-04-01 | 山东电力研究院 | Adjustable bias jet DC coal burner |
| CN202284791U (en) * | 2011-10-22 | 2012-06-27 | 淄博科邦热工科技有限公司 | Burner of decomposition furnace with variable air flow fields |
| CN202835346U (en) * | 2012-08-23 | 2013-03-27 | 上海三融环保工程有限公司 | Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere |
-
2012
- 2012-08-23 CN CN201210302623.5A patent/CN102809151B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201215311Y (en) * | 2008-04-30 | 2009-04-01 | 山东电力研究院 | Adjustable bias jet DC coal burner |
| CN202284791U (en) * | 2011-10-22 | 2012-06-27 | 淄博科邦热工科技有限公司 | Burner of decomposition furnace with variable air flow fields |
| CN202835346U (en) * | 2012-08-23 | 2013-03-27 | 上海三融环保工程有限公司 | Burning denitration burner installed in cement decomposing furnace under lean oxygen atmosphere |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953224A (en) * | 2016-06-20 | 2016-09-21 | 上海三融环保工程有限公司 | Saturated steam catalytic burner used for cement decomposition furnace |
| CN111578270A (en) * | 2020-05-26 | 2020-08-25 | 中材海外工程有限公司 | Low-nitrogen combustion device for cement kiln tail |
| CN111578270B (en) * | 2020-05-26 | 2022-08-23 | 中国中材海外科技发展有限公司 | Low-nitrogen combustion device for cement kiln tail |
| CN113277760A (en) * | 2021-06-30 | 2021-08-20 | 崇左南方水泥有限公司 | Method and system for cooperatively treating electrolytic manganese slag in cement kiln |
| CN113277760B (en) * | 2021-06-30 | 2023-08-15 | 崇左南方水泥有限公司 | Method and system for cooperatively disposing electrolytic manganese slag by cement kiln |
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| CN102809151B (en) | 2015-06-10 |
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