DE3413564A1 - Method and device for reducing the discharge of nitrogen oxides - Google Patents
Method and device for reducing the discharge of nitrogen oxidesInfo
- Publication number
- DE3413564A1 DE3413564A1 DE19843413564 DE3413564A DE3413564A1 DE 3413564 A1 DE3413564 A1 DE 3413564A1 DE 19843413564 DE19843413564 DE 19843413564 DE 3413564 A DE3413564 A DE 3413564A DE 3413564 A1 DE3413564 A1 DE 3413564A1
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- gasification
- combustion zone
- main combustion
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
- F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/10—Furnace staging
- F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
- F23C2201/301—Staged fuel supply with different fuels in stages
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
Verfahren und Vorrichtung zur Verminderung Method and device for reduction
des Ausstoßes von Stickoxiden Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Verminderung des Ausstoßes von Stickoxiden bei der Verbrennung von festen Brennstoffen mit den Merkmalen des Oberbegriffes des Anspruches 1 und 6. of the emission of nitrogen oxides The invention relates to a method and a device for reducing the emission of nitrogen oxides during combustion of solid fuels with the features of the preamble of claim 1 and 6th
Bei einer solchen Verbrennung werden die in der Hauptverbrennungszone gebildeten Stickoxide durch den weiteren Brennstoff chemisch reduziert, so daß der Gehalt an Stickoxiden im Rauchgas nach dem Verlassen der Brennkammer erniedrigt wird (DE-PS 30 21 479). Als weiteren Brennstoff kann ein Teil des Hauptbrennstoffs oder ein vom Hauptbrennstoff unterschiedlicher fester, flüssigen oder gasförmigen Brennstoff verwendet werden.In such a combustion, those in the main combustion zone Nitrogen oxides formed chemically reduced by the further fuel, so that the Nitrogen oxide content in the flue gas decreased after leaving the combustion chamber is (DE-PS 30 21 479). A part of the main fuel can be used as additional fuel or a solid, liquid or gaseous one different from the main fuel Fuel can be used.
Bei der Verwendung eines festen Brennstoffes als weiteren Brennstoff ist jedoch nicht immer sicherzustellen, daß dieser feste Brennstoff in der Brennkammer vollständig ausbrennt.When using a solid fuel as an additional fuel however, it is not always necessary to ensure that this solid fuel is in the combustion chamber burns out completely.
Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Verfahren und eine gattungsgemäße Vorrichtung derart weiter zu entwickeln, daß unter Sicherung eines weitgehenden Ausbrandes ein fester Brennstoff zur Reduktion der Stickoxide verwendet werden kann.The invention is based on the object of a generic method and to develop a generic device in such a way that under fuse an extensive burnout, a solid fuel to reduce nitrogen oxides can be used.
Diese Aufgabe wird bei einem gattungsgemäßen Verfahren durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Eine Vorrichtung insbesondere zur Durchführung des Verfahrens ist durch die Merkmale des Anspruches 6 gekennzeichnet. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This task is carried out in a generic method by the characterizing Features of claim 1 solved. A device in particular for implementation of the method is characterized by the features of claim 6. Beneficial Refinements of the invention are given in the subclaims.
Durch die Erfindung wird erreicht, daß der als weiterer Brennstoff verwendete feste Brennstoff vor dem Eintritt in die Brennkammer in den gasförmigen Zustand übergeführt wird. Der so gewonnene gasförmige Brennstoff steht sofort nach dem Eintritt in die Brennkammer für eine Reduktion der in der Hauptverbrennungszone gebildetenStickoxide zur Verfügung. Dieser Brennstoff verbrennt ohne feste unverbrannte Rückstände zu bilden.The invention achieves that as a further fuel used solid fuel before entering the combustion chamber in the gaseous State is transferred. The gaseous fuel obtained in this way is immediately behind the entry into the combustion chamber for a reduction in that in the main combustion zone nitrogen oxides formed are available. This fuel burns without solid unburned To form residues.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is shown in the drawing and is explained in more detail below.
Die Zeichnung stellt ein Verfahrensschema zur Durchführung der Erfindung dar.The drawing represents a process scheme for carrying out the invention represent.
Eine Brennkammer 1 ist als Teil eines Dampferzeugers von aus gekühlten Rohren bestehenden Wänden 2 begrenzt.A combustion chamber 1 is cooled as part of a steam generator Pipes existing walls 2 limited.
In einer Wand 2 oder in zwei einander gegenüberliegenden Wänden 2 sind in mehreren Ebenen übereinander Brenner 3 angeordnet. Die Brenner 3 werden mit Kohlenstaub beaufschlagt, der in Mühlen 4 gemahlen wird, von denen nur eine gezeigt ist. Die Mühle 4 ist über Staubleitungen 5 mit den Brennern 3 verbunden.In a wall 2 or in two opposing walls 2 Burner 3 are arranged one above the other in several levels. The burners 3 are charged with coal dust, which is ground in mills 4, of which only one is shown. The mill 4 is connected to the burners 3 via dust lines 5.
über die Brenner 3 wird die Hauptmenge des Brennstoffes in die Brennkammer 1 eingeführt. Der Bereich der Brennkammer 1 in Höhe der Brenner 3 stellt die Hauptverbrennungszone dar. Der Kohlenstaub wird mit Luft vorzugsweise überstöchiometrisch verbrannt. In der Brennkammer 1 wird eine Temperatur eingehalten, die unterhalb der Schmelztemperatur der in der Kohle enthaltenen Asche liegt.Most of the fuel is fed into the combustion chamber via the burner 3 1 introduced. The area of the combustion chamber 1 at the level of the burners 3 represents the main combustion zone The coal dust is burned with air, preferably over-stoichiometrically. In the combustion chamber 1 is maintained at a temperature which is below the melting temperature the ashes contained in the coal.
Oberhalb der durch die Höhe der Brenner 3 gegebenen Hauptverbrennungszone und damit in Strömungsrichtung der erzeugten Rauchgase gesehen hinter der Hauptver- brennungszone sind Zuführungen 6 für einen weiteren Brennstoff vorgesehen. Dieser weitere Brennstoff, der etwa 10 % des gesamten der Brennkammer 1 zugeführten Brennstoffes ausmacht, dient dazu, das in der Hauptverbrennungszone gebildete Stickoxid chemisch zu reduzieren. Oberhalb der Brennstoff zuführungen 6 sind Luftzuführungen 7 in Form sogenannter over fire air ports vorgesehen. über die Luftzuführungen 7 wird die Restluft zugegeben, um den Ausbrand in der Brennkammer 1 sicher zu stellen.Above the main combustion zone given by the height of the burner 3 and thus, seen in the direction of flow of the smoke gases generated, behind the main combustion zone feeds 6 are provided for a further fuel. This further fuel, which makes up about 10% of the total fuel supplied to the combustion chamber 1, serves to chemically reduce the nitrogen oxide formed in the main combustion zone. Above the fuel feeds 6 are air feeds 7 in the form of so-called over fire air ports provided. The remaining air is added via the air inlets 7, to ensure the burnout in the combustion chamber 1.
Der durch die Zuführungen 6 eingebrachte weitere Brennstoff wird durch Vergasung von festen Brennstoffen gewonnen. Für die Vergasung kann ein Vergasungsreaktor 8 mit einem Festbett, einem Wirbelbett oder einer Flugstaubwolke vorgesehen werden. Bevorzugt kommt ein Staubvergaser zum Einsatz. Werden Kohlen mit einem hohen Gehalt an flüchtigen Bestandteilen verwendet, so kann auch der weitere Brennstoff durch eine Entgasung gegebenenfalls in Verbindung mit einer Teilvergasung gewonnen werden.The additional fuel introduced through the feed lines 6 is carried through Gasification obtained from solid fuels. A gasification reactor can be used for gasification 8 can be provided with a fixed bed, a fluidized bed or a cloud of airborne dust. A dust gasifier is preferably used. Become coals with a high content if volatile constituents are used, the additional fuel can also get through degassing can optionally be obtained in connection with partial gasification.
Der Vergasungsreaktor 8 ist im dargestellten Fall als Staubvergaser ausgebildet. Der Vergasungsreaktor 8 weist einen Brennstoffeintrag auf, der über eine Förderleitung 9 mit der Mühle 4 verbunden ist. In den Vergasungsreaktor werden als Vergasungsmittel Luft, Sauerstoff, Wasser oder Wasserdampf eingebracht. An den Austrag des Vergasungsreaktors 8 ist ein Kühler 10 angeschlossen. Der Kühler 10 ist mit Kühlrohren versehen, die von Wasser durchströmt und in den Wasser-Dampf-Kreislauf des Dampferzeugers eingebunden sind.The gasification reactor 8 is in the illustrated case as a dust gasifier educated. The gasification reactor 8 has a fuel inlet that over a conveying line 9 is connected to the mill 4. Be in the gasification reactor Air, oxygen, water or water vapor are introduced as a gasification agent. To the A cooler 10 is connected to the discharge of the gasification reactor 8. The cooler 10 is provided with cooling pipes through which water flows and enters the water-steam cycle of the steam generator are integrated.
Der in dem Vergasungsreaktor 8 erzeugte gasförmige Brennstoffstrom wird nach dem Verlassen des Kühlers 10 einem Abscheider 11 zugeführt, in welchem der Feststoffanteil abgetrennt wird. Der Abscheider 11 kann ein Zyklon sein. An den Feststoffaustrag des Abscheiders 11 ist eine Feststoffleitung 12 angeschlossen, über die der abgetrennte Feststoff der Brennkammer 1 zugeführt wird. Die Feststoffleitung 12 kann zu eigenen, in der Wand 2 der Brennkammer 1 angeordneten Brennern 13 oder über eine Leitung 14 zu der Mühle 4 geführt werden. Der Gasaustritt des Abscheiders 11 ist mit den Zuführungen 6 für den weiteren Brennstoff verbunden.The gaseous fuel flow generated in the gasification reactor 8 becomes 10 after leaving the cooler fed to a separator 11, in which the solids content is separated off. The separator 11 can be a cyclone be. A solids line 12 is connected to the solids discharge of the separator 11, Via which the separated solid is fed to the combustion chamber 1. The solids line 12 can be attached to its own burners 13 or located in the wall 2 of the combustion chamber 1 be guided to the mill 4 via a line 14. The gas outlet of the separator 11 is connected to the feed lines 6 for the further fuel.
Abweichend von der dargestellten Ausführungsform kann der Vergasungsreaktor auch in der Wand der Brennkammer angeordnet sein, so daß die den Vergasungsreaktor verlassenden Brennstoffströme unmittelbar ohne Kühlung und Feststoffabscheidung in die Brennkammer eintreten.Notwithstanding the embodiment shown, the gasification reactor also be arranged in the wall of the combustion chamber, so that the gasification reactor leaving fuel flows directly without cooling and solids separation enter the combustion chamber.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE19843413564 DE3413564A1 (en) | 1984-04-11 | 1984-04-11 | Method and device for reducing the discharge of nitrogen oxides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843413564 DE3413564A1 (en) | 1984-04-11 | 1984-04-11 | Method and device for reducing the discharge of nitrogen oxides |
Publications (1)
Publication Number | Publication Date |
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DE3413564A1 true DE3413564A1 (en) | 1985-10-24 |
Family
ID=6233222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE19843413564 Withdrawn DE3413564A1 (en) | 1984-04-11 | 1984-04-11 | Method and device for reducing the discharge of nitrogen oxides |
Country Status (1)
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DE (1) | DE3413564A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987006677A1 (en) * | 1986-04-29 | 1987-11-05 | Saarbergwerke Aktiengesellschaft | Process and plant for reducing nitrogen monoxide emissions when burning solid fuels |
EP0248539A1 (en) * | 1986-05-07 | 1987-12-09 | Hitachi, Ltd. | Atomizer and coal-water slurry fired boiler utilizing the same |
DE3825291A1 (en) * | 1988-07-26 | 1990-02-01 | Ver Kesselwerke Ag | METHOD AND COMBUSTION PLANT FOR COMBUSTION OF FOSSILER FUELS WITH REDUCED EMISSIONS OF NITROGEN |
DE3934447A1 (en) * | 1989-02-16 | 1991-04-18 | Saarbergwerke Ag | METHOD AND SYSTEM FOR DEGASSING SOLID FUEL IN A FLUIDIZED BED REACTOR |
DE3943035A1 (en) * | 1989-02-16 | 1991-07-04 | Saarbergwerke Ag | Prepn. of nitric oxide emissions from coal-fired furnace - by degassing coal with hot gas fed to fluidised bed reactor before burning coal |
US5159886A (en) * | 1991-02-01 | 1992-11-03 | Metallgesellschaft Aktiengesellschaft | Process of combusting coal in a circulating fluidized bed |
DE4204787A1 (en) * | 1992-02-18 | 1993-08-19 | Saarbergwerke Ag | Nitrogen oxide(s) redn. during solid fuel combustion - includes injecting crude tar into hot combustion gas |
WO2000008382A1 (en) * | 1998-08-06 | 2000-02-17 | Institute Of Gas Technology | Process and apparatus for emissions reduction using partial oxidation of combustible material |
NL2001797C2 (en) * | 2008-07-14 | 2010-01-18 | Essent En Produktie B V | Method for burning a second solid fuel in combination with a first solid fuel. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2716973B1 (en) * | 1977-04-16 | 1978-01-19 | Steinmueller Gmbh L & C | Reducing pollution when burning coal dust in power stations - where dust is briefly gasified and the gas purified before use |
DE3021479A1 (en) * | 1979-06-07 | 1980-12-11 | Mitsubishi Heavy Ind Ltd | METHOD FOR BURNING FUEL WITH REDUCED EMISSION OF NITROGEN OXIDS |
DE3326100A1 (en) * | 1983-07-20 | 1985-02-07 | Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf | Process and plant for the reduction of nitrogen oxides emission in flue gases and furnace plants |
-
1984
- 1984-04-11 DE DE19843413564 patent/DE3413564A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2716973B1 (en) * | 1977-04-16 | 1978-01-19 | Steinmueller Gmbh L & C | Reducing pollution when burning coal dust in power stations - where dust is briefly gasified and the gas purified before use |
DE3021479A1 (en) * | 1979-06-07 | 1980-12-11 | Mitsubishi Heavy Ind Ltd | METHOD FOR BURNING FUEL WITH REDUCED EMISSION OF NITROGEN OXIDS |
DE3326100A1 (en) * | 1983-07-20 | 1985-02-07 | Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf | Process and plant for the reduction of nitrogen oxides emission in flue gases and furnace plants |
Non-Patent Citations (1)
Title |
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Yasuro Takahashi et al.: Development of "MACT" In-Furnace NO¶X¶ Removal Process for Steam Generators. In: Proc. of the 1982 Joint Symp. on Stationary Combustion NO¶X¶ Control, Vol. 1: Utility Boiler Applications, S. 15-1 bis 15-20, July 1983 * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987006677A1 (en) * | 1986-04-29 | 1987-11-05 | Saarbergwerke Aktiengesellschaft | Process and plant for reducing nitrogen monoxide emissions when burning solid fuels |
EP0248539A1 (en) * | 1986-05-07 | 1987-12-09 | Hitachi, Ltd. | Atomizer and coal-water slurry fired boiler utilizing the same |
US4784043A (en) * | 1986-05-07 | 1988-11-15 | Hitachi, Ltd. | Atomizer and coal-water slurry fired boiler utilizing the same |
DE3825291A1 (en) * | 1988-07-26 | 1990-02-01 | Ver Kesselwerke Ag | METHOD AND COMBUSTION PLANT FOR COMBUSTION OF FOSSILER FUELS WITH REDUCED EMISSIONS OF NITROGEN |
DE3934447C2 (en) * | 1989-02-16 | 1999-02-11 | Saarbergwerke Ag | Process and plant for degassing solid fuel in a fluidized bed reactor |
DE3943035A1 (en) * | 1989-02-16 | 1991-07-04 | Saarbergwerke Ag | Prepn. of nitric oxide emissions from coal-fired furnace - by degassing coal with hot gas fed to fluidised bed reactor before burning coal |
DE3943035C2 (en) * | 1989-02-16 | 1998-10-01 | Saarbergwerke Ag | Process for reducing nitrogen oxide emissions from coal-fired combustion plants |
DE3934447A1 (en) * | 1989-02-16 | 1991-04-18 | Saarbergwerke Ag | METHOD AND SYSTEM FOR DEGASSING SOLID FUEL IN A FLUIDIZED BED REACTOR |
US5159886A (en) * | 1991-02-01 | 1992-11-03 | Metallgesellschaft Aktiengesellschaft | Process of combusting coal in a circulating fluidized bed |
DE4204787A1 (en) * | 1992-02-18 | 1993-08-19 | Saarbergwerke Ag | Nitrogen oxide(s) redn. during solid fuel combustion - includes injecting crude tar into hot combustion gas |
WO2000008382A1 (en) * | 1998-08-06 | 2000-02-17 | Institute Of Gas Technology | Process and apparatus for emissions reduction using partial oxidation of combustible material |
NL2001797C2 (en) * | 2008-07-14 | 2010-01-18 | Essent En Produktie B V | Method for burning a second solid fuel in combination with a first solid fuel. |
WO2010008280A1 (en) * | 2008-07-14 | 2010-01-21 | Essent Energie Productie B.V. | Method for combusting a second solid fuel in combination with a first solid fuel |
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