DE3726483A1 - Process and device for reducing the formation of CO in the combustion process of fossil fuels, preferably coals - Google Patents

Process and device for reducing the formation of CO in the combustion process of fossil fuels, preferably coals

Info

Publication number
DE3726483A1
DE3726483A1 DE19873726483 DE3726483A DE3726483A1 DE 3726483 A1 DE3726483 A1 DE 3726483A1 DE 19873726483 DE19873726483 DE 19873726483 DE 3726483 A DE3726483 A DE 3726483A DE 3726483 A1 DE3726483 A1 DE 3726483A1
Authority
DE
Germany
Prior art keywords
reducing
formation
coals
fossil fuels
combustion process
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.)
Ceased
Application number
DE19873726483
Other languages
German (de)
Inventor
Heinz Dipl Ing Hoelter
Heinrich Dipl Ing Igelbuescher
Heinrich Ing Grad Gresch
Heribert Dipl Ing Dewert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWG STEINKOHLEN-WIRBELSCHICHTFEUERUNGSTECHNIK GMBH
Original Assignee
Hoelter Heinz
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoelter Heinz filed Critical Hoelter Heinz
Priority to DE19873726483 priority Critical patent/DE3726483A1/en
Publication of DE3726483A1 publication Critical patent/DE3726483A1/en
Ceased legal-status Critical Current

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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories

Abstract

In the patent application it is described how, through a selective air supply in the intake area of the coal in a fluidised bed firing installation, preferably through several nozzles, the resulting CO value can be reduced by more than 90%, it being advantageous to place a surface with holes above the nozzle arrangement, and at the same time a low stoichiometric air supply changes the combustion process to a sensible, low NOx combustion.

Description

Es ist bekannt, daß der CO-Wert bei unterstöchiome­ trischer Verbrennung teilweise stark ansteigt und den vorgegebenen Grenzwert nach der technischen An­ leitung "Luft" überschreitet.It is known that the CO value in substoichioma tric combustion increases sharply and the specified limit according to the technical an line "air" exceeds.

Insbesondere bei NO x -reduzierenden Maßnahmen, ins­ besondere bei der Rauchgasrückführung oder bei der allgemeinen Luftreduzierung im Verbrennungsraum ist die CO-Bildung sehr stark.The CO formation is very strong, in particular in the case of measures which reduce NO x , in particular in the case of flue gas recirculation or in the general reduction of air in the combustion chamber.

Bei der Wirbelschichtfeuerung wurde gefunden, daß im Bereich des Kohleeinlasses in Strömungsrichtung oberhalb des Kohleeintrages Luft zugeführt wird. Eine bevorzugte Ausbildungsform ist eine Lanze in Form mehrerer kleiner Düsen. Um eine weitere noch bessere Verteilung zu erlangen, wird weiterhin er­ findungsgemäß vorgeschlagen, oberhalb dieser Düsen ein Lochblech anzubringen, so daß eine gute Ver­ mischung der dort im Eintragungsbereich der Kohle sich bildenden Gase gewährleistet ist. In the case of fluidized bed firing, it was found that in the area of the coal inlet in the direction of flow air is supplied above the coal entry. A preferred form of training is a lance in Shape of several small nozzles. Another one he will continue to gain better distribution proposed according to the invention, above these nozzles to attach a perforated plate so that a good Ver mix the coal there in the entry area forming gases is guaranteed.  

Messungen haben gezeigt, daß durch diese Vorgehens­ weise der CO-Gehalt über 90% reduziert werden kann, wobei gleichzeitig naturgemäß der NO x -Wert aufgrund der unterstöchiometrischen Luftzufuhr an­ nähernd konstant im niedrigen Bereich gehalten wer­ den kann.Measurements have shown that this procedure can reduce the CO content by over 90%, while at the same time, of course, the NO x value can be kept approximately constant in the low range due to the substoichiometric air supply.

Claims (1)

Verfahren und Vorrichtung zur Reduzierung des CO- Wertes bei Wirbelbettfeuerungsanlagen, dadurch ge­ kennzeichnet, daß im Bereich des Kohleeintrages in das Wirbelbett oberhalb Düsen angeordnet sind, die Luft zublasen und vorzugsweise oberhalb dieser Dü­ sen zur Verbesserung der Vermischung der entstehen­ den Gase und der zugeführten Luft eine Lochflächen­ körperanordnung, vorzugsweise Lochblech in feuer­ fester Ausführung angebracht ist.Method and device for reducing the CO value in fluidized bed combustion systems, characterized in that in the region of the coal entry into the fluidized bed above nozzles are arranged to blow in the air and preferably above these nozzles to improve the mixing of the gases and the supplied air a perforated surface body arrangement, preferably perforated sheet in a refractory version is attached.
DE19873726483 1987-08-08 1987-08-08 Process and device for reducing the formation of CO in the combustion process of fossil fuels, preferably coals Ceased DE3726483A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873726483 DE3726483A1 (en) 1987-08-08 1987-08-08 Process and device for reducing the formation of CO in the combustion process of fossil fuels, preferably coals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873726483 DE3726483A1 (en) 1987-08-08 1987-08-08 Process and device for reducing the formation of CO in the combustion process of fossil fuels, preferably coals

Publications (1)

Publication Number Publication Date
DE3726483A1 true DE3726483A1 (en) 1989-02-16

Family

ID=6333391

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873726483 Ceased DE3726483A1 (en) 1987-08-08 1987-08-08 Process and device for reducing the formation of CO in the combustion process of fossil fuels, preferably coals

Country Status (1)

Country Link
DE (1) DE3726483A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713082A1 (en) * 1976-03-26 1977-10-06 Rolls Royce 1971 Ltd FLUID BED COMBUSTION DEVICE
DE2952091A1 (en) * 1979-12-22 1981-07-02 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Pulverised coal feed for fluidised-bed furnace - distributes coal and air through hollow beams above bed
EP0152529A2 (en) * 1984-02-21 1985-08-28 Deutsche Babcock Werke Aktiengesellschaft Steam generator with a stationary fluidized bed combuster
EP0157901A2 (en) * 1984-04-11 1985-10-16 GebràœDer Sulzer Aktiengesellschaft Fluidized-bed furnace
DE3115843C2 (en) * 1981-04-21 1986-12-04 Deutsche Babcock Anlagen Ag, 4200 Oberhausen Fluidized bed combustion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713082A1 (en) * 1976-03-26 1977-10-06 Rolls Royce 1971 Ltd FLUID BED COMBUSTION DEVICE
DE2952091A1 (en) * 1979-12-22 1981-07-02 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Pulverised coal feed for fluidised-bed furnace - distributes coal and air through hollow beams above bed
DE3115843C2 (en) * 1981-04-21 1986-12-04 Deutsche Babcock Anlagen Ag, 4200 Oberhausen Fluidized bed combustion
EP0152529A2 (en) * 1984-02-21 1985-08-28 Deutsche Babcock Werke Aktiengesellschaft Steam generator with a stationary fluidized bed combuster
EP0157901A2 (en) * 1984-04-11 1985-10-16 GebràœDer Sulzer Aktiengesellschaft Fluidized-bed furnace

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: SWG STEINKOHLEN-WIRBELSCHICHTFEUERUNGSTECHNIK GMBH

8131 Rejection