EP0078876A1 - Procédé et appareil pour chauffer de l'air de combustion et de combustibles dans des installations de chauffage - Google Patents

Procédé et appareil pour chauffer de l'air de combustion et de combustibles dans des installations de chauffage Download PDF

Info

Publication number
EP0078876A1
EP0078876A1 EP82103501A EP82103501A EP0078876A1 EP 0078876 A1 EP0078876 A1 EP 0078876A1 EP 82103501 A EP82103501 A EP 82103501A EP 82103501 A EP82103501 A EP 82103501A EP 0078876 A1 EP0078876 A1 EP 0078876A1
Authority
EP
European Patent Office
Prior art keywords
air
chamber
nozzle
combustion
fuel
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Withdrawn
Application number
EP82103501A
Other languages
German (de)
English (en)
Inventor
Herbert Dr. Jovy
Wilhelm Schuster
Jürgen Wittekind
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.)
Feraton Anstalt
Original Assignee
Feraton Anstalt
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 Feraton Anstalt filed Critical Feraton Anstalt
Publication of EP0078876A1 publication Critical patent/EP0078876A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F23C7/02—Disposition of air supply not passing through burner
    • F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
    • 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 invention relates to a method for heating combustion air and fuel for the combustion of liquid, gaseous or dusty fuels or mixtures thereof in a burner for heating systems, in which an air stream flowing in with a first flow direction is initially supplied with a quantity of heat originating from the boiler room of the heating system. then the direction of flow is reversed and a quantity of heat from a burner device is supplied to the air flow, then the direction of flow is reversed again and the heated combustion air is mixed with the fuel in the combustion chamber of the boiler.
  • the fuel for example the heating oil
  • additional energy usually electrical energy.
  • This heating is caused either by conventional heating resistors with temperature sensors for regulating the temperature or by heating resistors with a positive temperature coefficient at which a temperature-dependent heating current occurs.
  • DE-OS 2 358 187 discloses a device on oil burners, in particular for hot water heating systems, which is designed such that the method steps described at the outset can be carried out with it. Apart from the fact that the fuel is not preheated in this device, neither sufficient air heating nor satisfactory mixing of the combustion air with the fuel can be achieved with it.
  • the air heater has the shape of a pot which is flared upwards.
  • the air preheating increases the flow velocity of the air by about 2.5 times, which means that there is a risk that the flame will tear off.
  • the conical expansion of the pot reduces the flame diameter and has practically no contact with the wall of the combustion chamber. As a result, the air flowing through the inner annular space surrounding the combustion chamber is no longer heated sufficiently.
  • the funnel-shaped opening of the pot slows down the required rotation of the flame and thus reduces the mixing effect.
  • the area in which the air is diverted from the inner annular space and directed against the nozzle and swirl disk is relatively large. The result is that a correspondingly large cold air quantity is sucked in and mixed with the preheated air and a large part of the preheating is destroyed.
  • DE-OS 2 643 293 describes an oil burner in which the combustion air is supplied under pressure and is likewise passed in opposite directions through two concentric annular spaces.
  • the slightly preheated air flows through an annular slot nozzle essentially axially into the combustion chamber and surrounds the burner flame with an air jacket.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, achieves the object of providing a method for heating combustion air and fuel for the combustion of liquid, gaseous or dusty fuels or mixtures thereof, in which the incoming combustion air is heated and then electrically preheated fuel is brought together, which is further heated.
  • a suitable for performing the procedure device consists of a burner, in which a nozzle array with nozzles, nozzle and ignition electrodes and in a K essel space two adjacent, the outer annular space axially extending, concentric annular chambers are provided for the air guide, wherein the inner annular space surrounding a combustion chamber, on which the End facing the nozzle assembly has an air inlet and is connected at the opposite end to the inner annulus, which in turn opens near the nozzle assembly into the combustion chamber and which is characterized in that a portion of the electrically heated nozzle assembly carrying the nozzle into a high temperature chamber The area of the combustion chamber protrudes, while the section of the nozzle assembly facing away from the nozzle is surrounded by a low-temperature chamber which is arranged in an air pre-chamber downstream of an air blower.
  • the combustion air and the fuel already have correspondingly high temperatures when they are brought together in the combustion chamber, so that the complex processes in the flame are accelerated.
  • the fuel can burn completely in the flame in the time available. Since the heated combustion air flows into the preheated fuel emerging from the nozzle, swirling takes place and thus thorough mixing, which promotes combustion.
  • a retaining ring provided in the combustion chamber also brings about a compression of the combustion-air mixture, which increases the residence time and also contributes to more complete combustion.
  • the viscosity of liquid fuels is reduced and thus better atomization at the nozzle is achieved. This causes difficulties in the burning operation, which result from fluctuations in the fuel quality, especially when loading drifted with heating oil, can result, avoided. In this way, even higher viscosity heating oils can be burned without additional devices or without the use of special special burners.
  • the single figure shows a schematic longitudinal section through a burner.
  • the boiler room 21 of the system is only indicated and its boiler wall 5 is partially shown in section.
  • Other main parts are the nozzle assembly 15 with the nozzle 10 and two ignition electrodes 16, which together are referred to as the nozzle arrangement.
  • An air blower 1 is arranged outside the boiler and is connected to an air pre-chamber 2, which is also arranged outside the boiler and directly adjoins the boiler wall 5.
  • Three sheet metal cylinders protrude into the boiler space 21, namely an outer cylinder 6, a middle cylinder 7 and an inner cylinder 8.
  • the outer cylinder 6 projects from a connecting flange 4 which is connected to the boiler wall 5.
  • the end of the outer cylinder 6 facing away from the connecting flange 4 merges into a curvature 22 which connects the outer wall of the outer cylinder 6 to the outer wall of the inner cylinder 8.
  • the middle cylinder 7 protrudes from the connecting flange 4 and ends at a distance below the curvature 22, so that a passage exists between the annular space 23 enclosed by the outer and middle cylinders 6 and 7 and the annular space 24 enclosed by the middle and inner cylinders 7 and 8 is formed for the combustion air flowing through.
  • the inner cylinder 8 forms the flame tube, which surrounds the combustion chamber 9. It extends from the curvature 22 against the connecting flange 4 and ends at a distance therefrom, so that a for the combustion air D urch passage remains free from the inner annular space 24 into the combustion chamber 9.
  • This arrangement transforms the combustion air in a manner known per se.
  • An air baffle plate 12 is arranged directly above the nozzle 10 and is held by a support and centering ring 11 for the nozzle assembly 15.
  • Pressure ring 25 exerts a pressure on the air-fuel mixture in combustion chamber 9, which compresses this mixture and promotes its combustion.
  • the nozzle arrangement is inserted through the connecting flange 4 such that a section of the nozzle assembly 15 with the nozzle 10 and a part of the ignition electrodes 16 protrude into the combustion chamber 9.
  • Fuel is drawn in by a fuel pump 20 via a suction line 26 and conveyed via a pressure line 27 through a spiral groove 29 in the nozzle assembly 15, where it is electrically preheated.
  • a power line 18 is provided, which is connected to an electronic control unit 19, from which a high-voltage line 17 leads to the two ignition electrodes 16.
  • the air blower 1 opens into an air pre-chamber 2 which is arranged between the air blower 1 and the connecting flange 4 and which communicates with the outer annular space 23 of the concentric cylinders via an air inlet 3 in the connecting flange 4.
  • a protective hood 13 is arranged in the air pre-chamber 2 and surrounds the section of the nozzle assembly 15 projecting into the air pre-chamber 2 and the corresponding part of the ignition electrodes 13.
  • the protective hood 13 is fastened to the connecting flange 4 and has air inlet openings 14 on its bottom, through which a part of the in the Air pre-chamber 2 conveyed combustion air can enter the interior of the protective hood 13.
  • the space enclosed by the protective hood 13 is a low-temperature chamber 2a, which acts as a temperature chamber.
  • the area of the connecting flange 4 covering the low-temperature chamber 2a is provided, in each case adjacent to the ignition electrodes 16 and the nozzle assembly 15, with air outlet openings 28, through which the air from the low-temperature chamber 2a enters the space which reaches the parts of the nozzle assembly 15 and which project into the combustion chamber 9 the ignition electrodes 16 surrounds.
  • This space forms a high-temperature chamber 9a, in which the temperature-regulating air from the low-temperature chamber 2a is mixed with the strongly heated air from the inner annular space 24.
  • the portion of the cold combustion air conveyed by the air blower 1 that flows into the low-temperature chamber 2a flows through the nozzle assembly 15 and the ignition electrodes 16 and prevents an inadmissibly high heating of the components and the fuel. This prevents the fuel flowing in under pressure from being heated too high and already exiting the nozzle 10 in vapor or gaseous form.
  • the outer cylinder 6 acts as a heat exchange surface.
  • the air flow is reversed, so that the combustion air now flows in the opposite direction through the inner annular space 24, where the heat originating from the flame in the combustion chamber 9 absorbs.
  • the inner cylinder 8 acts as a heat exchange surface.
  • the combustion air which has a very high temperature, is passed over the surface of the nozzle 10 and over the section of the nozzle assembly 15 protruding into the combustion chamber, and reverses with the flow direction and reaches the same heated fuel emerging from the nozzle 10 into the combustion chamber 9.
  • the combustion air impacts the air baffle plate 12, which promotes swirling and thus the mixing of air and fuel.
  • the constriction ring 25 narrowing the cross section of the combustion chamber 9 reinforces this effect.
  • the nozzle assembly 15 and the nozzle 10 can be adapted to the fuel used in each case by a corresponding design.
  • the final temperature of the fuel can also be set to the optimum value specific to the respective fuel by varying the dimension of the surface of the nozzle assembly 15 around which the combustion air flows.
  • an additional electrical nozzle block heater is provided.
  • the burner according to the invention allows a very compact construction of the air and fuel preheater, so that its dimensions do not differ significantly from the dimensions of conventional burners. This means that it can be retrofitted into conventional and existing combustion chambers.
  • the flame noise was significantly lower than with the cold burner or with comparable burners that work without preheating.
  • the flame Since a photocell working in the visible range of light, which is known to serve to interrupt the oil supply when the flame goes out, does not respond to the blue flame, the flame is either switched on with a photocell that responds to the infrared oscillating at a frequency of 12-15 Hz -Radiation of the flame responds or monitored with an ionization sensor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Control Of Combustion (AREA)
EP82103501A 1981-11-06 1982-04-24 Procédé et appareil pour chauffer de l'air de combustion et de combustibles dans des installations de chauffage Withdrawn EP0078876A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH713381 1981-11-06
CH7133/81 1981-11-06

Publications (1)

Publication Number Publication Date
EP0078876A1 true EP0078876A1 (fr) 1983-05-18

Family

ID=4320474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103501A Withdrawn EP0078876A1 (fr) 1981-11-06 1982-04-24 Procédé et appareil pour chauffer de l'air de combustion et de combustibles dans des installations de chauffage

Country Status (4)

Country Link
EP (1) EP0078876A1 (fr)
JP (1) JPS5879657A (fr)
DE (2) DE3202938A1 (fr)
NO (1) NO823567L (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500874A3 (fr) * 2003-07-21 2008-11-12 J. Eberspächer GmbH & Co. KG Brûleur pour dispositif de chauffage pour véhicule
DE102010050058A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Luftwärmetauscher
CN103119364A (zh) * 2010-09-28 2013-05-22 罗伯特·博世有限公司 油预混燃烧器
AT515221A1 (de) * 2013-12-16 2015-07-15 Vaillant Group Austria Gmbh Brennersystem für ein Kraft-Wärme-Kopplungssystem mit externer Verbrennung
US11052729B2 (en) * 2016-07-18 2021-07-06 Webasto SE Burner and vehicle heater

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH059487Y2 (fr) * 1985-06-04 1993-03-09
JPS62657A (ja) * 1985-06-27 1987-01-06 Isuzu Motors Ltd 燃焼器
DE19900025A1 (de) * 1999-01-02 2000-07-06 Abb Research Ltd Brennerhaube
DE102010028736B4 (de) * 2010-05-07 2020-12-03 Eberspächer Climate Control Systems GmbH Brennstoffversorgungssystem, insbesondere für ein Fahrzeugheizgerät und Verfahren zum Betreiben eines Brennstoffversorgungssystems

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH114844A (de) * 1924-10-23 1926-07-01 Sulzer Ag Olbrenner mit umlaufendem Zerstäuber.
US2120387A (en) * 1933-03-14 1938-06-14 Bargeboer Adolf Device for burning atomized liquid fuel
FR1148255A (fr) * 1955-04-29 1957-12-05 Bataafsche Petroleum Dispositif de combustion
GB992369A (en) * 1962-09-26 1965-05-19 Robert Volkert Atomizing oil burner
DE2056450A1 (de) * 1970-11-17 1972-05-18 Hoffmann K Kontaktlose Umgebungs-Einflüsse erfassende Allölaufheizungs-Vorrichtung
DE2358187A1 (de) * 1973-11-22 1975-05-28 Ernst Schweppe Vorrichtung an oelbrennern, insbesondere fuer warmwasserheizungen
GB1425122A (en) * 1973-04-10 1976-02-18 Zink Co John Comubstion apparatus
DE2643293A1 (de) * 1976-09-25 1978-03-30 Herbert Ahlgrimm Oelbrenner
GB2053447A (en) * 1979-07-09 1981-02-04 Blueray Systems Inc Blue flame burner
DE2943289A1 (de) * 1979-10-26 1981-05-14 Peter 7300 Esslingen Witkowski Brenner fuer fluessige und/oder gasfoermige brennstoffe, insbesondere fuer industrielle oefen

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH114844A (de) * 1924-10-23 1926-07-01 Sulzer Ag Olbrenner mit umlaufendem Zerstäuber.
US2120387A (en) * 1933-03-14 1938-06-14 Bargeboer Adolf Device for burning atomized liquid fuel
FR1148255A (fr) * 1955-04-29 1957-12-05 Bataafsche Petroleum Dispositif de combustion
GB992369A (en) * 1962-09-26 1965-05-19 Robert Volkert Atomizing oil burner
DE2056450A1 (de) * 1970-11-17 1972-05-18 Hoffmann K Kontaktlose Umgebungs-Einflüsse erfassende Allölaufheizungs-Vorrichtung
GB1425122A (en) * 1973-04-10 1976-02-18 Zink Co John Comubstion apparatus
DE2358187A1 (de) * 1973-11-22 1975-05-28 Ernst Schweppe Vorrichtung an oelbrennern, insbesondere fuer warmwasserheizungen
DE2643293A1 (de) * 1976-09-25 1978-03-30 Herbert Ahlgrimm Oelbrenner
GB2053447A (en) * 1979-07-09 1981-02-04 Blueray Systems Inc Blue flame burner
DE2943289A1 (de) * 1979-10-26 1981-05-14 Peter 7300 Esslingen Witkowski Brenner fuer fluessige und/oder gasfoermige brennstoffe, insbesondere fuer industrielle oefen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500874A3 (fr) * 2003-07-21 2008-11-12 J. Eberspächer GmbH & Co. KG Brûleur pour dispositif de chauffage pour véhicule
CN103119364A (zh) * 2010-09-28 2013-05-22 罗伯特·博世有限公司 油预混燃烧器
DE102010050058A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Luftwärmetauscher
DE102010050058B4 (de) * 2010-10-29 2012-05-24 Robert Bosch Gmbh Luftwärmetauscher
EP2447608A3 (fr) * 2010-10-29 2017-10-25 Robert Bosch GmbH Echangeur de chaleur à air
AT515221A1 (de) * 2013-12-16 2015-07-15 Vaillant Group Austria Gmbh Brennersystem für ein Kraft-Wärme-Kopplungssystem mit externer Verbrennung
US11052729B2 (en) * 2016-07-18 2021-07-06 Webasto SE Burner and vehicle heater

Also Published As

Publication number Publication date
NO823567L (no) 1983-05-09
DE8203062U1 (de) 1982-08-12
JPS5879657A (ja) 1983-05-13
DE3202938A1 (de) 1983-05-19

Similar Documents

Publication Publication Date Title
DE2700671C2 (de) Blaubrennender Ölbrenner
DE3010078C2 (de) Mit flüssigem Brennstoff betriebener Brenner für Heizvorrichtungen
DE2742070A1 (de) Industriebrenner zur beheizung von ofenraeumen in industrieoefen
EP0307538A2 (fr) Foyer de chaudière
DE2836433A1 (de) Rekuperatorbrenner fuer industrieoefen
DE19724861C1 (de) Gasbrenner für einen Heizkessel
DE2352204B2 (de) Verbrennungseinrichtung zur verbrennung von stoerstoffen in abgasen
EP0078876A1 (fr) Procédé et appareil pour chauffer de l'air de combustion et de combustibles dans des installations de chauffage
DE3343617C2 (fr)
DE4319213A1 (de) Brenner zur schnellen und motorunabhängigen Aufheizung eines Abgaskatalysators
DE3930569A1 (de) Mischeinrichtung fuer brenner
DE3905762C2 (fr)
EP0578131A1 (fr) Chauffe-eau avec brûleur catalytiques
DE2821932C2 (fr)
DE3732491A1 (de) Zuendbrenner fuer eine vorrichtung zum verbrennen von festkoerperpartikeln im abgas von brennkraftmaschinen
DE1476475B2 (de) Vorrichtung zum nachbrennen von abgasen
EP0227637B1 (fr) Brûleur à mazout
DE2447151C3 (de) Brenner zur Verbrennung von flüssigem Brennstoff
DE4308017C1 (de) Wassererwärmer mit katalytischem Brenner und Verfahren zu seinem Betreiben
CH662640A5 (de) Vergasungsbrenner fuer fluessigen brennstoff.
EP0445413B1 (fr) Brûleur avec recirculation des gaz d'échappement, notamment brûleur à air soufflé
DE4222711A1 (de) Warmwasserbereiter mit einem katalytischen Brenner
DE1962839C3 (de) Vorrichtung zur Verbrennung von Abgas
EP0445393B1 (fr) Brûleur avec récirculation des gaz d'échappement, notamment brûleur à air soufflé
DE2142018B2 (de) Durchlauferhitzer mit einem heizschacht

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH FR GB LI SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840119

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JOVY, HERBERT, DR.

Inventor name: SCHUSTER, WILHELM

Inventor name: WITTEKIND, JUERGEN