EP0656507A2 - Brûleur à prémélange opérant au gaz - Google Patents

Brûleur à prémélange opérant au gaz Download PDF

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Publication number
EP0656507A2
EP0656507A2 EP94118537A EP94118537A EP0656507A2 EP 0656507 A2 EP0656507 A2 EP 0656507A2 EP 94118537 A EP94118537 A EP 94118537A EP 94118537 A EP94118537 A EP 94118537A EP 0656507 A2 EP0656507 A2 EP 0656507A2
Authority
EP
European Patent Office
Prior art keywords
gas
hollow body
fan
burner
premix burner
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Withdrawn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
EP94118537A
Other languages
German (de)
English (en)
Other versions
EP0656507A3 (fr
Inventor
Peter Prof. Dr. Hofbauer
Heribert Schmitz
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.)
Viessmann Werke GmbH and Co KG
Original Assignee
Viessmann Werke GmbH and Co KG
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 Viessmann Werke GmbH and Co KG filed Critical Viessmann Werke GmbH and Co KG
Publication of EP0656507A2 publication Critical patent/EP0656507A2/fr
Publication of EP0656507A3 publication Critical patent/EP0656507A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • the invention relates to a gas premix burner, in particular for gas combustion in boilers, preferably a radiant burner, with a hollow body provided with openings for the gas-air mixture, preferably made of stainless steel mesh, the premixed gas-air mixture being blown through by a fan the hollow body formed space is supplied, in which at least one gas distributor is arranged, and with a blower drive motor and with control and shut-off devices for the gas and with an air supply for the combustion air.
  • a gas premix burner in particular for gas combustion in boilers, preferably a radiant burner, with a hollow body provided with openings for the gas-air mixture, preferably made of stainless steel mesh, the premixed gas-air mixture being blown through by a fan the hollow body formed space is supplied, in which at least one gas distributor is arranged, and with a blower drive motor and with control and shut-off devices for the gas and with an air supply for the combustion air.
  • gas premix burners in particular radiation burners of the type described above, have been developed which couple a large part of the radiation directly from the combustion surface.
  • relatively large radiation combustion surfaces are required, since a specific heat load of 400 kW / m2 should not be exceeded. Since it is not possible to accommodate such large radiation burners in one plane in order to achieve compact radiation burners, the known radiation burners are designed with radiation burners designed as hollow bodies.
  • the invention has for its object to develop a gas premix burner of the type described in such a way that not only the disadvantages described above are avoided, but also a considerably more compact design is made possible.
  • the solution to this problem by the invention is characterized in that the fan is arranged in the hollow body.
  • blower in the space of the hollow body which also serves as the gas inflow chamber not only results in a considerably more compact design for the burner, but also a small volume for the gas inflow chamber formed by the hollow body, so that at the same time the disadvantages described above are avoided when starting up and when switching off the burner.
  • the gas supply is arranged directly in the suction area of the blower, so that the gas-air mixture is already produced on the suction side of the blower, but only short distances for the mixture due to the arrangement of the blower within the hollow body must be covered up to the focal surface. Since the gas-air mixture flows through the blower in this development according to the invention, a particularly uniform mixture results.
  • the drive motor and / or the regulating and shut-off devices for the gas can also be arranged in the hollow body in addition to the blower. This results in an even more compact design, so that the burner according to the invention can easily be used on different boilers.
  • the blower is provided with a cover having outlet openings and gas guides, which is either arranged at a constant distance within the gas distributor or whose distance decreases from the edge to the center of the hollow body.
  • a displacement body can be arranged, the surface of which either runs at a constant distance from the gas distributor, or whose distance from the edge to the center of the hollow body decreases. In both cases, the free volume of the gas inflow chamber is reduced to the desired level.
  • the radiation burner shown on the basis of three exemplary embodiments comprises a support ring 1 to which a base part 2 is fastened.
  • This base part 2 is formed in one piece in the exemplary embodiment according to FIG. 1 and serves as a carrier for the different parts of the burner.
  • the base part 2 is made in several parts. It consists of a base plate 2a and a base ring 2b, between which a molded body 2c made of thermal insulation or composite material is arranged.
  • an insulating ring 3 is fastened, which is made in one piece in the exemplary embodiment according to FIG. 1 and in two parts in the exemplary embodiments according to FIGS. 2 and 3 and in turn carries an intermediate ring 4.
  • This intermediate ring 4 is in turn a hollow body 5 acting as a radiation burning surface and in each case two gas distributors 6a and 6b are fastened in all exemplary embodiments.
  • the gas distributor 6b serves as a kind of metering plate, the gas distributor 6a as a distributor plate.
  • the hollow body 5 which is preferably made of a stainless steel mesh, serves as the radiation combustion surface, so that a very high proportion of the heat generated by the gas combustion is removed directly from the reaction zone by heat radiation from the hollow body 5, which on the other hand allows the combustion gas temperature to be kept low.
  • the gas to be burned is fed through a gas line 7, which ends in an intake 8 for combustion air.
  • the resulting gas-air mixture is sucked in by a fan 9, the fan wheel 9a of which is arranged inside the hollow body 5.
  • the impeller 9a thus lies within a gas inflow chamber 10 which is delimited to the hollow body 5 by the gas distributors 6a or 6b.
  • This gas inflow chamber 10 is supplied with a completely premixed gas-air mixture by the impeller 9a, which is evenly supplied to the inner surface of the hollow body 5 with the aid of the gas distributors 6a and 6b and burns on the entire outer surface of the hollow body 5.
  • an ignition electrode 11 is provided, which is only shown in FIG. 1 as an exemplary embodiment and is also used in a corresponding manner in the embodiments according to FIGS. 2 and 3.
  • the impeller 9a of the fan 9 is provided with a gas-permeable cover 9b, which is fastened in a suitable manner either to the support ring 1 or to the intermediate ring 4. 1, this cover 9b is just like the hollow body 5 and the gas distributors 6a and 6b are hemispherical and run at a constant distance within the gas distributor 6b.
  • the impeller 9a of the first exemplary embodiment also has an approximately hemispherical surface and fills almost the entire space formed by the cover 9b.
  • the impeller 9a is supported with its fan shaft 9c in two bearings 9d, one of which is supported on the base part 2 via a bearing housing and the other is supported on the cover 9b via a bearing housing 9e.
  • the impeller 9a is driven via a drive wheel 12 fastened to the fan shaft 9c, a toothed belt 13 and a drive pinion 14a by a drive motor 14 which is arranged on the side of the base part 2 facing away from the impeller 9a.
  • the embodiment according to FIG. 2 shows a similar construction.
  • the base part 2 is made in several parts from the base plate 2a, base ring 2b and molded body 2c; a modified impeller 9a is also used.
  • the impeller 9a does not fill the entire space formed by the cover 9b. Instead, a displacement body 15 is used, which together with the impeller 9a fills the gas inflow chamber 10 in a hemispherical manner.
  • FIG. 3 shows one Embodiment in which the drive motor 14 of the fan 9 is arranged inside the fan wheel 9a and thus also within the gas inflow chamber 10.
  • the impeller 9a is designed to be relatively narrow and is also provided with a cover 9b on which a displacement body 15 is arranged, through which the volume of the gas inflow chamber 10 available for the gas-air mixture is reduced so that only a small volume of an unburned gas-air mixture is obtained after the radiation burner has been switched off.
  • the hollow body 5 can also have a shape other than the hemispherical one shown; it can be designed as a rotationally symmetrical body in the manner of a cylinder, cone or paraboloid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP94118537A 1993-12-03 1994-11-25 Brûleur à prémélange opérant au gaz. Withdrawn EP0656507A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934341126 DE4341126C2 (de) 1993-12-03 1993-12-03 Gas-Vormischbrenner, insbesondere Strahlungsbrenner für Heizkessel
DE4341126 1993-12-03

Publications (2)

Publication Number Publication Date
EP0656507A2 true EP0656507A2 (fr) 1995-06-07
EP0656507A3 EP0656507A3 (fr) 1996-01-24

Family

ID=6504035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118537A Withdrawn EP0656507A3 (fr) 1993-12-03 1994-11-25 Brûleur à prémélange opérant au gaz.

Country Status (2)

Country Link
EP (1) EP0656507A3 (fr)
DE (1) DE4341126C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20090215A1 (it) * 2009-07-22 2011-01-23 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas, particolarmente per apparecchi bruciatori a pre-miscelazione.
US20150300689A1 (en) * 2012-10-18 2015-10-22 Thermolift, Inc. Combination Solar and Combustion Heater

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT404295B (de) * 1994-12-21 1998-10-27 Vaillant Gmbh Strahlungsbrenner
DE29708377U1 (de) * 1997-05-09 1997-07-17 Viessmann Werke Gmbh & Co, 35108 Allendorf Gasflächenbrenner
DE29816864U1 (de) * 1998-09-19 2000-01-27 Viessmann Werke GmbH & Co., 35108 Allendorf Heizkesselgebläsebrenner
FR2800444B1 (fr) 1999-10-29 2002-03-08 Ct D Etude Et De Realisation D Emetteur sureleve de chauffage a rayonnement infrarouge et lumineux au gaz en particulier pour alimentation en tres basse pression
US6449947B1 (en) * 2001-10-17 2002-09-17 Fleetguard, Inc. Low pressure injection and turbulent mixing in selective catalytic reduction system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63251710A (ja) * 1987-04-07 1988-10-19 Osaka Gas Co Ltd 燃焼装置
DE4118861A1 (de) * 1991-06-07 1992-12-10 Buderus Heiztechnik Gmbh Vormischender gasbrenner
DE9304247U1 (de) * 1993-03-23 1993-06-03 Viessmann Werke GmbH & Co, 3559 Allendorf Strahlungsbrenner für Heizkessel
DE4218754A1 (de) * 1992-06-06 1993-12-09 Froeling Kessel App Verfahren zur schadstoffarmen Verbrennung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321663A1 (fr) * 1975-08-20 1977-03-18 Vidalenq Maurice Bruleur a gaz a air souffle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63251710A (ja) * 1987-04-07 1988-10-19 Osaka Gas Co Ltd 燃焼装置
DE4118861A1 (de) * 1991-06-07 1992-12-10 Buderus Heiztechnik Gmbh Vormischender gasbrenner
DE4218754A1 (de) * 1992-06-06 1993-12-09 Froeling Kessel App Verfahren zur schadstoffarmen Verbrennung
DE9304247U1 (de) * 1993-03-23 1993-06-03 Viessmann Werke GmbH & Co, 3559 Allendorf Strahlungsbrenner für Heizkessel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13 no. 45 (M-792) ,2.Februar 1989 & JP-A-63 251710 (OSAKA GAS ) 19.Oktober 1988, *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20090215A1 (it) * 2009-07-22 2011-01-23 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas, particolarmente per apparecchi bruciatori a pre-miscelazione.
EP2278224A3 (fr) * 2009-07-22 2013-02-27 LN 2 S.R.L. a socio unico Mélangeur air/gaz, en particulier pour brûleur à prémélange
US20150300689A1 (en) * 2012-10-18 2015-10-22 Thermolift, Inc. Combination Solar and Combustion Heater

Also Published As

Publication number Publication date
DE4341126C2 (de) 1998-01-22
EP0656507A3 (fr) 1996-01-24
DE4341126A1 (de) 1995-06-08

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