EP0207433B1 - Verfahren zur Verbrennung von Brennstoff unter Zuführung von Luft mit einem Brenner - Google Patents

Verfahren zur Verbrennung von Brennstoff unter Zuführung von Luft mit einem Brenner Download PDF

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Publication number
EP0207433B1
EP0207433B1 EP86108638A EP86108638A EP0207433B1 EP 0207433 B1 EP0207433 B1 EP 0207433B1 EP 86108638 A EP86108638 A EP 86108638A EP 86108638 A EP86108638 A EP 86108638A EP 0207433 B1 EP0207433 B1 EP 0207433B1
Authority
EP
European Patent Office
Prior art keywords
burner
jet
reaction zone
process according
combustion
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.)
Expired - Lifetime
Application number
EP86108638A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0207433A3 (en
EP0207433A2 (de
Inventor
Karl Heinz Dipl.-Phys. Krieb
Hans-Harald Dr.-Ing. Halling
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.)
DR.-ING. HANS-HARALD HALLING TE VELBERT-LANGENBERG
Original Assignee
Steag GmbH
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 Steag GmbH filed Critical Steag GmbH
Publication of EP0207433A2 publication Critical patent/EP0207433A2/de
Publication of EP0207433A3 publication Critical patent/EP0207433A3/de
Application granted granted Critical
Publication of EP0207433B1 publication Critical patent/EP0207433B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F23C99/003—Combustion process using sound or vibrations
    • 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • 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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass

Definitions

  • the invention relates to a method of the type mentioned in the preamble of claim 1 above.
  • Such a method is known from DE-OS 3 110 186, in which coal dust is mixed with a predetermined amount of exhaust gas while supplying combustion air, and air in a predetermined amount for combustion in a reaction zone which is formed in the first combustion stage necessary air is supplied.
  • the admixture of exhaust gas ensures that the coal dust burns slowly at a low temperature with a small amount of 0 2 and the unburned components NH 3 , HCN and CO and hydrocarbons formed during the combustion activate the intermediates which are suitable for the denitration reaction , are formed in large quantities, remain unburned for a longer period of time and are effectively involved in the breakdown of the NO formed.
  • Coal which is present in large quantities as an unburned component in the first low temperature reaction zone, is burned in the second reaction zone.
  • the first reaction zone is a flame zone.
  • the pulse field is built up by a gas jet of higher speed, this can e.g. be formed by an air jet, flue gas jet or another flame that burns essentially perpendicular to the flame.
  • the initiation of an ignition by means of a pulse field can advantageously also be used in the combustion of liquid or gaseous fuels.
  • the temperature that enables pyrolysis can be up to 800 ° C and is preferably 600-700 ° C.
  • flue gas recirculation in particular without internal flue gas recirculation, i.e. in the case of essentially laminar carrier air flow and secondary air flow in the first reaction zone, when the jet burner is operating at power in the first reaction zone, the coal dust escaping from the burner mouth is purely pyrolysed by the incoming dust from the combustion chamber Radiation (IR radiation). It is assumed that the concentration of OH radicals required for ignition in the first reaction zone is too low.
  • the oxygen content in the first reaction zone is preferably in the range of 3-6%, preferably 5%.
  • the flame is irradiated at the end of the first reaction zone with a pulse field of a predetermined width which is essentially transverse to the flame.
  • the OH field from the combustion in the second reaction zone (actual flame zone) caused by the pulse field from the combustion chamber is introduced in the ignition area at least into the outer jacket of the reaction zone and there leads to ignition of the coal dust, ie, the flue gas is mixed into the reaction zone by the pulse field.
  • the combustion in the second zone is preferably carried out with excess air. Due to the temporal and spatial separation of pre-combustion or pyrolysis and combustion with excess air, fuel nitrogen is primarily converted to molecular H 2 or the formation of “prompt” NO X via the detour via CN and NH Connections are largely avoided.
  • the pulse field can be moved along the flame axis.
  • the preceding claim 1 requires that the pulse field is directed essentially across the flame.
  • the invention includes both the displacement of a pulse field extending perpendicular to the flame axis along the flame axis and a pivoting of the pulse field with respect to the flame axis, insofar as an essential field component is oriented perpendicular to the flame axis.
  • the width of the pulse field is sufficient in the direction of the flame axis to ensure reliable ignition under different load conditions.
  • the invention is also directed to a furnace for carrying out the method with at least one jet burner and a combustion chamber.
  • at least one ultrasound transmitter is assigned to the jet burner, the ultrasound field of which is essentially perpendicular to the flame axis of the burner
  • at least one gas jet source is assigned to the jet burner, the gas jet of which is essentially perpendicular to the flame of the burner .
  • a coal dust jet burner 1 is arranged in the wall of a combustion chamber 2 and, as shown at 3, is supplied with a stream 13 of coal dust and carrier air.
  • a flame F is formed with two zones Z1 and Z2 lying one behind the other in the beam direction.
  • Secondary air 4 is supplied to the combustion chamber essentially parallel to the coal dust flow and at essentially the same speed. It continues in the firebox Tertiary air 5 is introduced, which is aligned with the second zone Z2.
  • a temperature of 600-700 ° C. prevails in the first zone Z1 in such a way that pyrolysis takes place in the flame zone Z1 under the influence of the schematically represented radiation IR of the combustion chamber.
  • an ultrasonic transmitter 6 is arranged in the combustion chamber wall in such a way that its ultrasonic field is oriented essentially perpendicular to the axis of the flame.
  • the ultrasonic field causes the coal dust to ignite at the end of the first zone Z1 and the coal dust burns in the zone Z2 when there is an excess of air which is set by the quantity of secondary air 4 supplied and, if appropriate, the quantity of tertiary air 5.
  • the ultrasonic transmitter 6 is either moved in the direction of the arrow shown at 7 or pivoted at 8 shown.
  • a plurality of ultrasound transmitters can be assigned to a burner 1. Due to the spatial and temporal separation of pyrolysis and combustion, the combustion being triggered by the ultrasound field, minimal NO formation is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP86108638A 1985-06-29 1986-06-25 Verfahren zur Verbrennung von Brennstoff unter Zuführung von Luft mit einem Brenner Expired - Lifetime EP0207433B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3523436 1985-06-29
DE19853523436 DE3523436A1 (de) 1985-06-29 1985-06-29 Verfahren zur verbrennung von kohlenstaub unter zufuehrung von luft mit einem kohlenstaubbrenner

Publications (3)

Publication Number Publication Date
EP0207433A2 EP0207433A2 (de) 1987-01-07
EP0207433A3 EP0207433A3 (en) 1988-06-08
EP0207433B1 true EP0207433B1 (de) 1990-01-10

Family

ID=6274637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108638A Expired - Lifetime EP0207433B1 (de) 1985-06-29 1986-06-25 Verfahren zur Verbrennung von Brennstoff unter Zuführung von Luft mit einem Brenner

Country Status (2)

Country Link
EP (1) EP0207433B1 (enrdf_load_stackoverflow)
DE (2) DE3523436A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD261289A3 (de) * 1986-11-11 1988-10-26 Freiberg Brennstoffinst Einrichtung zur kombinierten zuendung und ueberwachung von brennern
DD261290A3 (de) * 1986-11-11 1988-10-26 Freiberg Brennstoffinst Kombinierte zuend- und ueberwachungseinrichtung fuer brenner
DE4212334C1 (en) * 1992-04-13 1993-06-09 Henry 6830 Schwetzingen De Tischmacher Burning fuel oil or natural gas - with pure oxygen@ to obtain heat with high efficiency without harmful emissions, with photo:synthetic conversion using bio:reactor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE472812C (de) * 1923-04-16 1929-03-06 Jules Jean Deschamps Verfahren zur Foerderung der Verbrennung fester oder fluessiger Brennstoffe, bei demder Feuerung ein Gemisch aus Verbrennungsluft und darin in Schwebe gehaltener Brennstoffteilchen zugefuehrt wird
DE3110186A1 (de) * 1981-03-17 1982-10-07 Kawasaki Jukogyo K.K., Kobe, Hyogo Verfahren zur verbrennung von kohlenstaub mit einem kohlenstaubbrenner
SE458799B (sv) * 1983-12-02 1989-05-08 Insako Ab Saett och anordning foer foerbraenning av fluida braenslen

Also Published As

Publication number Publication date
EP0207433A3 (en) 1988-06-08
EP0207433A2 (de) 1987-01-07
DE3668233D1 (de) 1990-02-15
DE3523436A1 (de) 1987-01-08
DE3523436C2 (enrdf_load_stackoverflow) 1987-10-29

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