EP0272660B2 - Appareil de chauffage à gaz ayant un recyclage des gaz d'échappement externe - Google Patents

Appareil de chauffage à gaz ayant un recyclage des gaz d'échappement externe Download PDF

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Publication number
EP0272660B2
EP0272660B2 EP87118903A EP87118903A EP0272660B2 EP 0272660 B2 EP0272660 B2 EP 0272660B2 EP 87118903 A EP87118903 A EP 87118903A EP 87118903 A EP87118903 A EP 87118903A EP 0272660 B2 EP0272660 B2 EP 0272660B2
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EP
European Patent Office
Prior art keywords
exhaust
fact
gas heating
air
exhaust gas
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
EP87118903A
Other languages
German (de)
English (en)
Other versions
EP0272660B1 (fr
EP0272660A2 (fr
EP0272660A3 (en
Inventor
Walter Dipl.-Ing. Dreizler
Ulrich Dipl.-Ing. Dreizler
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT87118903T priority Critical patent/ATE66527T1/de
Publication of EP0272660A2 publication Critical patent/EP0272660A2/fr
Publication of EP0272660A3 publication Critical patent/EP0272660A3/de
Publication of EP0272660B1 publication Critical patent/EP0272660B1/fr
Application granted granted Critical
Publication of EP0272660B2 publication Critical patent/EP0272660B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/002—Stoves
    • F24C3/004—Stoves of the closed type
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/001—Details arrangements for discharging combustion gases
    • F24C15/002—Details arrangements for discharging combustion gases for stoves of the closed type
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/03007—Sealed combustion chambers with balanced flue
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F23J2211/101—Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement

Definitions

  • the invention serves to reduce NO x in gas heaters that are equipped with atmospheric gas burners and have a central, ie common combustion air supply and exhaust gas discharge line.
  • a new type of exhaust gas recirculation is used which enables the exhaust gas recirculation of a partial exhaust gas quantity back to the atmospheric gas burner without additional conveying devices and thus brings about a sufficient reduction in the NO x content in the exhaust gases under previously unknown economic conditions.
  • Atmospheric gas heating devices are known which, as so-called “outer wall devices”, are connected to the outside atmosphere with their combustion air line and exhaust line through the outer wall.
  • the pipes and combustion chamber are hermetically sealed against the room to be heated.
  • an atmospheric gas heating device of the generic type is known, with a closed combustion chamber, with an exhaust pipe and an air pipe serving for the combustion air supply, with a return of a partial exhaust gas quantity outside the combustion chamber for NOx reduction of the exhaust gas and with at least an overflow connection between the exhaust pipe and the air pipe for the exhaust gas recirculation, a motor-driven fan wheel being arranged in the exhaust pipe.
  • a congestion in the exhaust gas flow in such atmospheric gas heating devices without such an exhaust gas fan can lead to an explosion in the combustion chamber.
  • a throttle is arranged in the exhaust pipe downstream of the overflow connection for the exhaust gas recirculation, which could lead to such a jam if there were no exhaust fan.
  • the inventive solution in the subject matter of the invention enables a return of a partial exhaust gas quantity taking place outside the combustion chamber from the exhaust pipe directly into the adjacent air pipe either lying next to it or centrally outside.
  • the exhaust gas partial quantity in the exhaust pipe is transferred in the simplest way from the exhaust pipe into the air pipe via one or more defined openings at a set and / or adjustable differential pressure, from where it goes directly to the atmospheric gas burner and its combustion chamber and there the NO x -Reduction causes.
  • the partial exhaust gas quantity reaches the same ratio as the combustion air quantity both in the primary air premix and in the secondary air area of the atmospheric gas burner.
  • the exemplary embodiments described differ mainly in that the blower that transports the exhaust gases and at the same time sucks in the air is fitted once in the air duct and once in the exhaust gas path, otherwise the differential pressure is generated by the same throttle devices in the air pipe at the points described so that the desired partial exhaust gas quantity is available Exhaust gas recirculation is available.
  • FIGS. 1-4 show exemplary embodiments of atmospheric gas heating devices with common combustion air / exhaust gas routing, which are designed both as wall devices and as floor devices.
  • the atmospheric gas burner 20 is at the lower, open end of the radiator 1 attached, which is rod-shaped or round.
  • the primary air supply 3 with gas nozzle 4 and mixing tube 5 are located in the area of the air supply, which can be formed on one side as an air duct to the radiator 1 or as an annular duct 6 through the casing to the radiator 1, in any case in the atmospheric burner area a uniform air distribution both in the primary air supply 3 as well as in the secondary air area 7.
  • the exhaust gases are collected by the fan wheel 8 with the motor 9 in the exhaust gas box 19 and conveyed to the outside via the exhaust pipe 10a.
  • the air pipe 11a is arranged centrally to the exhaust pipe 10a to bring the combustion air 21.
  • the length of the exhaust pipe 10a and the air pipe 11a depends on the local conditions, but in practice is also carried out on the outer wall 22 up to the roof, in particular in modern condensing heating devices.
  • the exhaust pipe 10b runs next to the air pipe 11b, so both pipes are arranged side by side .
  • one or more overflow openings 12a are arranged at some point in the described double-pipe system “exhaust pipe” and “air pipe” in FIG.
  • the throttle device can consist of ring diaphragms 14.1 or bead-shaped pipe constrictions 14.2, of partial diaphragms 15 or fixed throttle valves 13.
  • the overflow opening 12b shown in FIG. 2a can also represent a line 23 if the exhaust pipe 10b and the air pipe 11b are arranged somewhat further apart when guided to the outside.
  • Figures 3 and 4 show the same gas heater in a side view and in longitudinal section with a conveying fan arranged in the combustion air path 21, the fan wheel 8 being seated in the air intake box 18 and being driven by the motor 9.
  • the combustion air 21 is drawn in from the outside via the air pipe 11a.
  • the exhaust gases are discharged via the exhaust pipe 10a.
  • the exhaust pipe 10b is arranged centrally to the surrounding air pipe 11a.
  • exhaust pipe 10a and air pipe 11b are arranged side by side.
  • the inventive measures 13 and 14 are located in exactly the same way, which ensure that a partial amount of exhaust gas flows from the exhaust pipe into the air pipe.
  • the above described in Figures 1 and 2a can apply to Figures 3 and 4.
  • the exhaust gas recirculation also works in atmospheric gas heating devices without a conveying fan if a sufficiently high heating element 1 provides positive pressure due to buoyancy.
  • the external exhaust gas recirculation is realized in a structurally simple manner and without economic effort, which enables a decisive reduction in No x below 57 ppm, which is no longer practically pollutant-free in the sense of the environment stressful gas heating can apply to small devices.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)

Claims (7)

  1. Chauffage au gaz atmosphérique comprenant un foyer fermé, un tuyau d'évacuation des gaz d'échappement (10a, 10b) et un tuyau (11a, 11b) servant à l'apport d'air de combustion, avec circuit de récupération partielle des gaz d'échappement, situé hors du foyer, en vue d'en réduire la teneur en NOx et avec au moins une liaison de trop-plein (12, 12a, 12b, 23) installée entre le tuyau à gaz d'échappement (10a, 10b) et le tuyau d'apport d'air (11a, 11b) et permettant le retour des gaz d'échappement, caractérisé en ce que dans le tuyau d'apport d'air (11a, 11b) en amont de la liaison de trop-plein (12, 12a, 12b, 23) est installé au moins un dispositif d'étranglement (13, 14, 14.1, 14.2) servant à générer une pression différentielle suffisante pour évancuer une quantité partielle définie de gaz d'échappement.
  2. Chauffage au gaz atmosphérique selon demande de brevet 1, se distingant par un rotor de ventilateur entraîné par moteur (8) dans le flux d'air de combustion.
  3. Chauffage au gaz atmosphérique selon demande de brevet 1 ou 2, se distingant par l'écartement entre le tuyau d'échappement (10b) et le tuyau d'air (11b) et par l'adaptation d'une conduite de court- circuitage (12, 12b, 23) comme liaison de trop-plein.
  4. Chauffage au gaz atmosphérique selon une des demandes de brevet précitiées, se distingant par la mise en sens opposé de l'entrée (12) de la liaison de trop-plein (23) dans le tuyau d'échappement (10b) et de la direction du flux des gaz d'échappement.
  5. Chauffage au gaz atmosphérique selon une des demandes de brevet précitées, se distingant par l'orientation de l'embouchures de la liaison du trop-plein dans le tuyau d'air (11b) dans la direction du flux d'air.
  6. Chauffage au gaz atmosphérique selon une des demandes de brevet précitées, si distingant par la configuation au moins partielle des installations d'étranglement en forme de diaphragme annulair (14.2) ou d'étranglement en forme de sertissage (14.1) ou de diaphragme partiel (15).
  7. Chauffage au gaz atmosphérique selon une des demandes de brevet précitées, se distingant par la disposition dans l'étranglement d'au moins un clapet (13) susceptible d'être réglé à volonté.
EP87118903A 1986-12-20 1987-12-19 Appareil de chauffage à gaz ayant un recyclage des gaz d'échappement externe Expired - Lifetime EP0272660B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87118903T ATE66527T1 (de) 1986-12-20 1987-12-19 Atmosphaerisches gasheizgeraet mit externer abgasrueckfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863643797 DE3643797A1 (de) 1986-12-20 1986-12-20 Atmosphaerisches gasheizgeraet mit externer abgasrueckfuehrung zur no(pfeil abwaerts)x(pfeil abwaerts)-reduzierung
DE3643797 1986-12-20

Publications (4)

Publication Number Publication Date
EP0272660A2 EP0272660A2 (fr) 1988-06-29
EP0272660A3 EP0272660A3 (en) 1989-10-18
EP0272660B1 EP0272660B1 (fr) 1991-08-21
EP0272660B2 true EP0272660B2 (fr) 1995-11-22

Family

ID=6316800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118903A Expired - Lifetime EP0272660B2 (fr) 1986-12-20 1987-12-19 Appareil de chauffage à gaz ayant un recyclage des gaz d'échappement externe

Country Status (3)

Country Link
EP (1) EP0272660B2 (fr)
AT (1) ATE66527T1 (fr)
DE (2) DE3643797A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1235432B (it) * 1988-11-16 1992-07-10 Sarno Cosimo Manovellismo a quattro punti morti
DE19510426A1 (de) * 1995-03-24 1996-09-26 Bosch Gmbh Robert Heizgerät
US6095792A (en) * 1998-08-21 2000-08-01 Texaco Inc. Flue gas recirculation system and method
FR2814797B1 (fr) * 2000-09-29 2003-10-10 Leblanc Sa E L M Perfectionnements apportes aux appareils de chauffage tels que les chaudieres murales a ventouse
DE10333965B3 (de) * 2003-07-25 2005-05-04 Robert Bosch Gmbh Abgasleitung für Heizgeräte
RU2365622C2 (ru) 2006-12-22 2009-08-27 Закрытое акционерное общество "Научно-исследовательский институт Аджиномото-Генетика" (ЗАО АГРИ) СПОСОБ ПРОДУКЦИИ ПУРИНОВЫХ НУКЛЕОЗИДОВ И НУКЛЕОТИДОВ МЕТОДОМ ФЕРМЕНТАЦИИ С ИСПОЛЬЗОВАНИЕМ БАКТЕРИЙ, ПРИНАДЛЕЖАЩИХ К РОДУ Escherichia ИЛИ Bacillus
TR201008484A2 (tr) 2010-10-15 2012-05-21 Bosch Termotekni̇k Sanayi̇ Ve Ti̇c.A.Ş. Isıtma cihazı ve bir ısıtma cihazının işletilmesi için metot.
EP3285020B1 (fr) * 2016-08-18 2020-07-22 Vaillant GmbH Appareil de chauffage
CN106225014B (zh) * 2016-08-23 2021-07-09 广东工业大学 具有烟气循环的圆底、平底器皿加热装置
CN110848713A (zh) * 2019-11-11 2020-02-28 张家骥 废气处理系统
FR3103881B1 (fr) * 2019-11-29 2021-12-31 Soc Ind De Chauffage Sic Installation de chauffage et/ou de production d’eau chaude sanitaire à maintenance améliorée

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE37773C (de) * H. HERZFELDER in Brünn, Mähren, Theresien-Glacis 1 Neuerung an Regenerativ-Gasöfen
US3765823A (en) * 1970-11-05 1973-10-16 Matsushita Electric Industrial Co Ltd Forced suction and exhaust type gas burner apparatus
US4345897A (en) * 1980-04-21 1982-08-24 Stanton C Robert Recirculating system for gas-fired furnace

Also Published As

Publication number Publication date
EP0272660B1 (fr) 1991-08-21
ATE66527T1 (de) 1991-09-15
EP0272660A2 (fr) 1988-06-29
DE3643797A1 (de) 1988-06-23
EP0272660A3 (en) 1989-10-18
DE3772355D1 (de) 1991-09-26

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