EP0391858A1 - Dispositif pour la recirculation du gaz de fumée dans des brûleurs à huile et à gaz - Google Patents

Dispositif pour la recirculation du gaz de fumée dans des brûleurs à huile et à gaz Download PDF

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Publication number
EP0391858A1
EP0391858A1 EP90810274A EP90810274A EP0391858A1 EP 0391858 A1 EP0391858 A1 EP 0391858A1 EP 90810274 A EP90810274 A EP 90810274A EP 90810274 A EP90810274 A EP 90810274A EP 0391858 A1 EP0391858 A1 EP 0391858A1
Authority
EP
European Patent Office
Prior art keywords
flame
tube
pipe
adapter
combustion air
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.)
Granted
Application number
EP90810274A
Other languages
German (de)
English (en)
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EP0391858B1 (fr
Inventor
Benno Balsiger
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0391858A1 publication Critical patent/EP0391858A1/fr
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Publication of EP0391858B1 publication Critical patent/EP0391858B1/fr
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
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads

Definitions

  • the present invention relates to a method according to the preamble of claim 1 and a related device.
  • nitrogen oxides NO x contribute to the formation of acid rain and ozone.
  • nitrogen monoxide NO is primarily responsible for the formation of ozone.
  • the emission of nitrogen oxides correlates directly with the level of the flame temperature.
  • the air components nitrogen and oxygen combine according to the so-called Zeldovich mechanism at temperatures above 1200 ° C to NO x .
  • exhaust gas recirculation is used to reduce pollutants.
  • the fuel is injected into the flame space through a central opening of a disk-shaped stabilizer which also acts as a baffle plate and is also referred to as a baffle plate.
  • Combustion air is supplied through a combustion air pipe around the fuel supply in front of the stabilizer. This passes into a flame tube in the area of the stabilizer.
  • the flue gas is added from the fuel supply behind the stabilizer with an adapter that encloses the combustion air supply in the form of a sleeve.
  • the flame space is often divided into complicated chambered combustion zones provided with microprocessor-controlled flap mechanisms.
  • the existing burners must be installed when installing exhaust gas recirculation be replaced by complicated, more expensive burners. In this way, not only retrofitting, but also maintenance is complicated and costly.
  • the slidable adapter tube in connection with the inlet openings in the flame tube enables the flue gas flows in and around the flame tube to be changed in the simplest way.
  • FIG. 1 shows a schematic representation of a burner for solid, liquid and gaseous fuels with an exhaust gas recirculation system according to the invention.
  • Fuel is passed through a fuel pipe 1 via a fuel nozzle 1a injected into the flame space 6 and thus generates a flame F.
  • a mostly circular disk is arranged on the fuel nozzle 1 a by means of flanges 4 a, which acts as a stabilizer for the flame and is referred to below as stabilizer 4.
  • the combustion air tube 2 merges into the flame tube 3, which has a conically shaped shoulder 3a in front of the stabilizer 4.
  • the exhaust gases are discharged through an exhaust pipe 7 into a chimney, not shown in the figure.
  • An exhaust gas recirculation duct 8 leads from the exhaust pipe 7 into an adapter housing 10.
  • An exhaust gas blower 9 is provided in the exhaust gas recirculation duct 8 for better recirculation of the exhaust gas. Furthermore, the exhaust gas flow can be regulated with a valve 16. From the adapter housing 10 leads an adapter tube part 12a which surrounds the combustion air tube 2 and which, via a conically increasing adapter tube shoulder 11, transfers into an adapter tube part 12b which is provided with a larger diameter and surrounds the flame tube 3.
  • the adapter tube 12a, 12b is mounted so as to be longitudinally displaceable in the adapter housing 10 and at the entry point into the flame space 6.
  • the shoulder 3a of the flame tube 3 is provided with openings 3b arranged in a ring, the function of which is explained below.
  • the openings could also optionally be provided in the combustion air tube 2 in the area of the adapter housing 10 or adapter tube part 12a.
  • the shoulders can also be arranged in the adapter tube 12a, 12b and in the flame tube (3,3a) or in the combustion air tube 2 in front of the stabilizer or, if no stabilizer is used, in front of the mouth of the fuel nozzle 1a.
  • the fuel is injected into the flame chamber 6 through the fuel pipe 1.
  • combustion air can flow into the flame chamber 6 through the combustion air pipe 2, which surrounds the fuel pipe.
  • the exhaust gases resulting from the combustion process are discharged into the chimney via the exhaust pipe 7.
  • a part of the exhaust gases - usually about 20% at full load - are conducted into the adapter housing 10 via the exhaust gas recirculation channel 8.
  • the return of the exhaust gases is supported by the exhaust fan 9.
  • Part of the exhaust gases 15 flows through the annular space formed between the flame tube 3 and adapter tube 12a, 12b and the other part passes through the openings 3b of the shoulder 3a of the flame tube 3.
  • the openings are in arranged in such a way that the exhaust gas component flowing in here passes around the stabilizer 4 into the flame chamber 6.
  • the ratio of the exhaust gas component 14 flowing into the flame tube 3 to the exhaust gas component 15 flowing around the flame tube 3 must be varied in order to achieve an optimal result.
  • movable or rotatable (e.g. ring-shaped) regulating diaphragms can also be provided, if necessary as additional regulating devices, with which the opening 3b of the flame tube shoulder 3a can be changed.
  • an activator In such an activator, a small part of the combustion air is passed through an aqueous electrolyte solution in the form of an aerosol to the combustion air and / or exhaust gases with a metering pump.
  • the electrolyte solution contains alkali and / or alkaline earth metal salts and optionally 2 to 12%, preferably about 5%, methyl alcohol.
  • the air or exhaust gas activated in this way is mixed with aerosol particles which evaporate in the flame space and dissociate into ions.
  • the ions are involved in the oxidation process, accelerate the ignition and significantly reduce the formation of soot, CO and other pollutants. At this point it should be pointed out that such an activator contains no heavy metals.
  • a recirculation ring 13 can be attached to the stabilizer 4 in front of the fuel nozzle 1a, as shown in FIG. This can be fastened to the stabilizer 4 by means of a holder 13a and has a diameter which is smaller than half the diameter of the stabilizer 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP90810274A 1989-04-07 1990-04-05 Dispositif pour la recirculation du gaz de fumée dans des brûleurs à huile et à gaz Expired - Lifetime EP0391858B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH133489 1989-04-07
CH1334/89 1989-04-07

Publications (2)

Publication Number Publication Date
EP0391858A1 true EP0391858A1 (fr) 1990-10-10
EP0391858B1 EP0391858B1 (fr) 1995-01-04

Family

ID=4208045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810274A Expired - Lifetime EP0391858B1 (fr) 1989-04-07 1990-04-05 Dispositif pour la recirculation du gaz de fumée dans des brûleurs à huile et à gaz

Country Status (5)

Country Link
EP (1) EP0391858B1 (fr)
AT (1) ATE116732T1 (fr)
DE (1) DE59008164D1 (fr)
DK (1) DK0391858T3 (fr)
ES (2) ES2028504A6 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110469848A (zh) * 2019-09-11 2019-11-19 江阴德尔热能机械有限公司 一种烟气循环超低氮燃烧装置
WO2020259576A1 (fr) * 2019-06-28 2020-12-30 浙江先创能源科技股份有限公司 Four à circulation forcée interne de gaz de combustion

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
DE2511500A1 (de) * 1975-03-15 1976-09-23 Smit Nijmegen Bv Brenner fuer die stoechiometrische verbrennung von fluessigen brennstoffen
DE2751524A1 (de) * 1977-11-18 1979-05-23 Deutsche Forsch Luft Raumfahrt Blaubrennender oelbrenner
EP0139085A1 (fr) * 1983-07-30 1985-05-02 Deutsche Babcock Werke Aktiengesellschaft Procédé et brûleur pour la combustion des combustibles liquides ou gazeux avec diminution de la formation de NOx
WO1986002987A1 (fr) * 1984-11-16 1986-05-22 Balsiger, Benno Dispositif pour activer le processus de combustion
DE3509896A1 (de) * 1985-03-19 1986-09-25 Klamke-Record Öl- und Gasbrenner GmbH, 5200 Siegburg Oelbrenner
DE3618987A1 (de) * 1986-06-05 1987-12-10 Walter Swoboda Verbrennungsverfahren
EP0275842A1 (fr) * 1986-12-19 1988-07-27 Angelo Nicola Di Liddo Procédé d'optimisation de la combustion par mélange d'un aérosol eau/sel et d'air de combustion et dispositif pour le réglage automatique de ce mélange
EP0288031A2 (fr) * 1987-04-21 1988-10-26 Max Weishaupt GmbH Procédé et installation de combustion pour réduire le contenu en oxyde d'azote dans des installations de combustion au mazout ou au gaz

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
DE2511500A1 (de) * 1975-03-15 1976-09-23 Smit Nijmegen Bv Brenner fuer die stoechiometrische verbrennung von fluessigen brennstoffen
DE2751524A1 (de) * 1977-11-18 1979-05-23 Deutsche Forsch Luft Raumfahrt Blaubrennender oelbrenner
EP0139085A1 (fr) * 1983-07-30 1985-05-02 Deutsche Babcock Werke Aktiengesellschaft Procédé et brûleur pour la combustion des combustibles liquides ou gazeux avec diminution de la formation de NOx
WO1986002987A1 (fr) * 1984-11-16 1986-05-22 Balsiger, Benno Dispositif pour activer le processus de combustion
DE3509896A1 (de) * 1985-03-19 1986-09-25 Klamke-Record Öl- und Gasbrenner GmbH, 5200 Siegburg Oelbrenner
DE3618987A1 (de) * 1986-06-05 1987-12-10 Walter Swoboda Verbrennungsverfahren
EP0275842A1 (fr) * 1986-12-19 1988-07-27 Angelo Nicola Di Liddo Procédé d'optimisation de la combustion par mélange d'un aérosol eau/sel et d'air de combustion et dispositif pour le réglage automatique de ce mélange
EP0288031A2 (fr) * 1987-04-21 1988-10-26 Max Weishaupt GmbH Procédé et installation de combustion pour réduire le contenu en oxyde d'azote dans des installations de combustion au mazout ou au gaz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020259576A1 (fr) * 2019-06-28 2020-12-30 浙江先创能源科技股份有限公司 Four à circulation forcée interne de gaz de combustion
CN110469848A (zh) * 2019-09-11 2019-11-19 江阴德尔热能机械有限公司 一种烟气循环超低氮燃烧装置

Also Published As

Publication number Publication date
ATE116732T1 (de) 1995-01-15
DK0391858T3 (da) 1995-05-15
ES2069053T3 (es) 1995-05-01
EP0391858B1 (fr) 1995-01-04
DE59008164D1 (de) 1995-02-16
ES2028504A6 (es) 1992-07-01

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