EP0579315A1 - Brûleur - Google Patents

Brûleur Download PDF

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Publication number
EP0579315A1
EP0579315A1 EP93201990A EP93201990A EP0579315A1 EP 0579315 A1 EP0579315 A1 EP 0579315A1 EP 93201990 A EP93201990 A EP 93201990A EP 93201990 A EP93201990 A EP 93201990A EP 0579315 A1 EP0579315 A1 EP 0579315A1
Authority
EP
European Patent Office
Prior art keywords
burner
primary
outflow opening
outflow openings
outflow
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.)
Ceased
Application number
EP93201990A
Other languages
German (de)
English (en)
Inventor
Wim Meijer
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.)
INGENIEURSBURO P.I. PRODUKT INNOVATIE B.V.
Original Assignee
Ingenieursburo Pi Produkt Innovatie Bv
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 Ingenieursburo Pi Produkt Innovatie Bv filed Critical Ingenieursburo Pi Produkt Innovatie Bv
Priority to EP93201990A priority Critical patent/EP0579315A1/fr
Publication of EP0579315A1 publication Critical patent/EP0579315A1/fr
Ceased 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
    • F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration

Definitions

  • the present invention relates to a burner provided with means for feeding fuel and at least one primary outflow opening connected to the fuel feed means and a number of secondary outflow openings connected to the fuel feed means and arranged close to the primary outflow opening.
  • Such burners are known, for instance from the Auslegeschrift 1429133 and, due to the presence of the secondary outflow openings, can be controlled relatively efficiently. This is because fuel flowing out through the secondary outflow openings has a comparatively small flow speed and will thereby also burn in stable manner in the case of high burner load and associated higher flow speeds. This stably burning fuel as it were ignites the fuel flowing out of the primary outflow opening at a much higher speed, whereby it will also burn stably, even when the outflow speed from the primary opening is higher than the actual combustion rate of the fuel.
  • known burners of this type cannot be controlled sufficiently well. Furthermore, relatively high combustion temperatures often occur in the known burners, whereby a relatively high content of harmful substances may be released.
  • the present invention therefore has for its object to provide a burner of the above described type with an improved control, an increased stability and reduced emission of harmful products when compared with the known burners.
  • This is achieved according to the invention in that on at least one side of the primary outflow opening at least two secondary outflow openings are arranged at different distances therefrom. In this manner the combustion of the fuel flowing out of the primary outflow opening can be stabilized well over a very wide range of burner loads.
  • the secondary outflow openings define a surface which encloses an angle with a longitudinal axis of the primary outflow opening. The area occupied by the burner can thus be reduced.
  • An energy-efficient burner is obtained when the secondary outflow openings define a conical surface, the top of which coincides substantially with the primary outflow opening.
  • the primary outflow opening can also be elongate and the secondary outflow openings can define a surface that is V-shaped in cross section.
  • the burner can then be manufactured in comparatively simple manner.
  • the burner When the burner is manufactured from a ceramic material the combustion temperature is lowered further, whereby the emission of harmful substances is reduced still further. Conversely, the burner can be produced in simple manner and at low cost if it is manufactured from sheet metal.
  • a burner 1 (fig. 1) comprises a primary outflow opening 2 and a number of secondary outflow openings 3 arranged in the vicinity of the primary outflow opening at different distances therefrom.
  • the primary outflow opening 2 and the secondary outflow openings 3 are all connected to fuel feed means in the form of a main pipe 4 and a number of drain pipes 5.
  • Also present between drain pipes 5 and secondary outflow openings 3 are expansion spaces 7.
  • a fuel usually a flammable gas-air mixture, is supplied through the main pipe 4. A portion of this fuel flows out of the primary outflow opening 2 and another portion flows through the drain pipes 5 and the secondary outflow openings 3.
  • the fuel flowing through the secondary outflow openings 3 has a considerably lower speed than the fuel flowing out through the primary outflow opening 2 as a result of the pressure fall occurring in the expansion space 7.
  • the fuel When leaving the outflow openings the fuel will burn in a pattern with a flame front 8 as shown in fig. 1.
  • the outflow rate of the fuel will likewise increase.
  • the outflow rate from the primary outflow opening 2 may locally exceed the combustion rate of the outflowing fuel, whereby this could be "blown out”.
  • This is however prevented due to the presence of the secondary outflow openings 3 with a much lower outflow rate on either side of the primary outflow opening 2.
  • the burn front or flame front 8 is moreover enlarged due to the presence of the secondary outflow openings 3, whereby the combustion heat is distributed over a greater surface area and the combustion temperature thus remains relatively low. This is particularly important in limiting the emission of nitrous oxide NO X .
  • the outflow rate from the primary outflow opening 2 also increases further, whereby the danger of blow-out becomes (still) greater.
  • the flame 8 present at the primary outflow opening 2 is still stabilized with a further enlarging of the combustion surface area.
  • the surface 9 defined by the secondary outflow openings 3 can enclose an acute angle ⁇ with the longitudinal axis 11 of the primary outflow opening 2 (fig. 4). This moreover achieves that, also at high burner loads, the gas leaving the primary outflow opening 2 flows closely over the surface 9 with the secondary outflow openings 3, thereby enabling a very good stability (fig. 5 and 6).
  • the secondary outflow openings 3 are otherwise connected to separate feed pipes 6.
  • a number of primary outflow openings 2 may be present, wherein the secondary outflow openings 3 then define in each case a conical surface 9 (fig. 7).
  • the primary outflow openings may also be of elongate shape in order to increase the burner power (fig. 8).
  • slot-like outflow openings 10 can also be arranged for feeding additional (oxygen-containing) air to the flame 8.
  • the distance between the secondary outflow openings 3 and the primary outflow openings 2 and the mutual distance between successive secondary outflow openings 3 can be determined in simple manner by the skilled person by means of tests or calculations on the basis of requirements set down for a specific burner.
  • the distribution of the outflow openings does not necessarily have to be as regular as shown here.
  • the angle which the plane through the secondary outflow openings 3 optionally has to enclose with the longitudinal axis of primary outflow opening 2 can also be easily determined by tests or calculations. Should this be deemed necessary for a good stability the drain pipes 5 or the secondary fuel feed pipes 6 can also be provided with valves, whereby, as the burner load increases, an increasing number of secondary outflow openings 3 is activated at increasing distance from the primary outflow opening 2.
  • the burner 1 can in principle be manufactured from any suitable, heat-resistant material.
  • the burner 1 can be manufactured very simply from thin sheet metal.
  • the burner 1 can also be manufactured from ceramic material which, due to its inherent insulating properties, results in a lower combustion temperature and therefore less emission.
  • the burner 1 according to the invention is suitable for use in many different appliances. Possible examples are open burners, closed burners and also so-called fan burners.
  • the burner is suitable for industrial application as well as for domestic heating uses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP93201990A 1992-07-07 1993-07-07 Brûleur Ceased EP0579315A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93201990A EP0579315A1 (fr) 1992-07-07 1993-07-07 Brûleur

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP92202074 1992-07-07
EP92202074 1992-07-07
EP93200037 1993-01-07
EP93200037 1993-01-07
EP93201990A EP0579315A1 (fr) 1992-07-07 1993-07-07 Brûleur

Publications (1)

Publication Number Publication Date
EP0579315A1 true EP0579315A1 (fr) 1994-01-19

Family

ID=27234613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93201990A Ceased EP0579315A1 (fr) 1992-07-07 1993-07-07 Brûleur

Country Status (1)

Country Link
EP (1) EP0579315A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0852316A3 (fr) * 1996-11-26 1999-07-21 Schott Glas Brûleur à gaz
EP1111302A1 (fr) * 1999-12-22 2001-06-27 Tokyo Gas Co., Ltd. Brûleur à faible émission de NOx et procédé de combustion avec émissions de NOx réduites
WO2008081271A2 (fr) * 2006-12-22 2008-07-10 Worgas - Bruciatori - S.R.L. Brûleur avec diffuseur résistant à des températures élevées de fonctionnement
ITPD20120282A1 (it) * 2012-09-27 2014-03-28 Systema Polska Sp Zo O Testa di combustione a gas per bruciatori premiscelati
CN103994479A (zh) * 2014-06-09 2014-08-20 宁波市金波金属制品有限公司 气炉
JP2014149109A (ja) * 2013-01-31 2014-08-21 Nippon Electric Glass Co Ltd 気体燃料バーナー

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121948A (en) * 1935-05-11 1938-06-28 Western Electric Co Burner
DE1184713B (de) * 1963-02-04 1965-01-07 Junkers & Co Gasbrenner, insbesondere fuer Gase mit geringer Zuendgeschwindigkeit
EP0303052A1 (fr) * 1987-07-15 1989-02-15 Joh. Vaillant GmbH u. Co. Brûleur à gaz

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121948A (en) * 1935-05-11 1938-06-28 Western Electric Co Burner
DE1184713B (de) * 1963-02-04 1965-01-07 Junkers & Co Gasbrenner, insbesondere fuer Gase mit geringer Zuendgeschwindigkeit
EP0303052A1 (fr) * 1987-07-15 1989-02-15 Joh. Vaillant GmbH u. Co. Brûleur à gaz

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 1 (M-656)6 January 1988 & JP-62 166 213 ( PALOMA IND. ) 22 July 1987 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 45 (M-667)(2892) 10 February 1988 & JP-A-62 196 517 ( OSAKA GAS ) 29 August 1987 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0852316A3 (fr) * 1996-11-26 1999-07-21 Schott Glas Brûleur à gaz
EP1111302A1 (fr) * 1999-12-22 2001-06-27 Tokyo Gas Co., Ltd. Brûleur à faible émission de NOx et procédé de combustion avec émissions de NOx réduites
US6705855B2 (en) 1999-12-22 2004-03-16 Tokyo Gas Co., Ltd. Low-NOx burner and combustion method of low-NOx burner
WO2008081271A2 (fr) * 2006-12-22 2008-07-10 Worgas - Bruciatori - S.R.L. Brûleur avec diffuseur résistant à des températures élevées de fonctionnement
WO2008081271A3 (fr) * 2006-12-22 2008-08-28 Worgas Bruciatori Srl Brûleur avec diffuseur résistant à des températures élevées de fonctionnement
ITPD20120282A1 (it) * 2012-09-27 2014-03-28 Systema Polska Sp Zo O Testa di combustione a gas per bruciatori premiscelati
EP2713105A1 (fr) 2012-09-27 2014-04-02 Systema Polska Sp. zo. o Tête de combustion pour brûleurs à gaz à prémélange et brûleur équipe d'une telle tête de combustion
JP2014149109A (ja) * 2013-01-31 2014-08-21 Nippon Electric Glass Co Ltd 気体燃料バーナー
CN103994479A (zh) * 2014-06-09 2014-08-20 宁波市金波金属制品有限公司 气炉
CN103994479B (zh) * 2014-06-09 2016-02-24 宁波市金波金属制品有限公司 气炉

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