EP1036983A1 - Rohrbrenner - Google Patents

Rohrbrenner Download PDF

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Publication number
EP1036983A1
EP1036983A1 EP99105600A EP99105600A EP1036983A1 EP 1036983 A1 EP1036983 A1 EP 1036983A1 EP 99105600 A EP99105600 A EP 99105600A EP 99105600 A EP99105600 A EP 99105600A EP 1036983 A1 EP1036983 A1 EP 1036983A1
Authority
EP
European Patent Office
Prior art keywords
burner
portions
fact
openings
mixture
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
EP99105600A
Other languages
English (en)
French (fr)
Other versions
EP1036983B1 (de
Inventor
Feliciano Lasagni
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.)
Beckett Thermal Solutions SRL
Original Assignee
Worgas Bruciatori SRL
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 Worgas Bruciatori SRL filed Critical Worgas Bruciatori SRL
Priority to AT99105600T priority Critical patent/ATE246782T1/de
Priority to ES99105600T priority patent/ES2204016T3/es
Priority to EP99105600A priority patent/EP1036983B1/de
Priority to DE69910167T priority patent/DE69910167T2/de
Publication of EP1036983A1 publication Critical patent/EP1036983A1/de
Application granted granted Critical
Publication of EP1036983B1 publication Critical patent/EP1036983B1/de
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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2211/00—Thermal dilatation prevention or compensation

Definitions

  • Tubular burners consist of a tubular shaped body into which a mixture of air and fuel, for example gaseous fuel, is introduced.
  • the body is provided with openings through which said mixture is made to flow out and then burned.
  • the mixture of air and fuel can be introduced into a tubular burner in various ways.
  • the body of the burner is provided internally with a Venturi tube into which the fuel is introduced under pressure by way of an injector nozzle, resulting in the intake of air from outside due to the so-called Venturi effect and formation of the mixture of air and gaseous fuel.
  • pre-mixed burners said mixture is introduced into the body of the burner by means of a fan or a compressor.
  • mixed or fan-assisted burners a mixture of air and fuel is introduced into the burner, by way of a fan or a compressor, under pressure or by suction, supercharging a Venturi tube housed in the body of the burner.
  • the body of the tubular burners can be obtained from a piece of metal sheet folded into the shape of a tube, of which the edges parallel to the axis of the tube are joined together by for example welding or seaming.
  • the entire body of the burner must be made of metal resistant to the high temperatures created by combustion of the mixture of air and gaseous fuel, even though only the portion of the burner body having the openings for outflow of the mixture of air and fuel is subjected to said high temperatures.
  • the thermal expansions to which the body of the burner is subjected during operation differ from zone to zone due to the different temperatures reached by the various zones of the burner body due to the distribution of the openings for outflow of the mixture of fuel and air to be burned.
  • This distribution is not generally uniform, since there are zones of the body of the burner entirely without openings and zones with various densities of said openings.
  • the different thermal expansions to which the various zones of the body of the burner are subjected give rise to mechanical stresses which reduce the lifetime of the burner.
  • Another known technique is to produce the body of a tubular burner with two shells of folded metal sheet, each of semi-tubular shape, joining together said two shells by welding, in such a way as to form a tubular body, along their edges parallel to the axis of said tubular body.
  • the joining of the two shells by welding creates some problems since the different thermal expansions of the two shells, due to the different temperatures to which they are subjected, give rise to deformations in the body of the burner during operation, with consequent mechanical stresses which limit the lifetime of the burner. Furthermore, the joining of the two shells by welding requires a continuous type procedure, in other words it is not possible to produce single or a limited number of burners at low cost. Finally, welding technology requires costly expedients to prevent the occurrence of detrimental effects, such as local strain hardening of the welded parts or welding defects.
  • the purpose of the present invention is to eliminate the aforesaid problems.
  • the present invention envisages a burner which can be fed with a mixture of air and fuel provided with a tubular body, with openings for the outflow of said mixture of air and fuel and having a longitudinal axis, said tubular body comprising at least a first body portion and at least a second body portion, said first portion and said second portion being joined together along respective edges parallel to said longitudinal axis, characterised by the fact that said first portion and said second portion are joined together by seaming of said edges.
  • the present invention permits simple and cheap production of a tubular burner consisting of portions made of different materials, for example a material with high temperature resistance for the portions subjected to higher temperatures and a less temperature resistant, and hence less costly, material for the portions subjected to lower temperatures, with a considerable reduction in costs.
  • the burner body portions can be joined by seaming in such a way as to permit reciprocal sliding movement of each portion relative to adjacent portions in a direction parallel to the axis of the burner in order to compensate for the different thermal expansions to which said portions are subjected, thereby avoiding deformations of the burner body and consequent mechanical stresses and significantly improving the lifetime of the burner.
  • Figure 1 shows a tubular burner according to the invention comprising a tubular body 1 with a longitudinal axis A, consisting of a first semi-tubular shaped body portion 2 and a second body portion 3, also of semi-tubular shape.
  • a tubular body 1 with a longitudinal axis A, consisting of a first semi-tubular shaped body portion 2 and a second body portion 3, also of semi-tubular shape.
  • On one of said semi-tubular portions, for example the first semi-tubular portion 2 there are made openings 4 for the outflow and subsequent combustion of a mixture of air and gaseous fuel which is introduced into the tubular body 1.
  • the first semi-tubular portion 2 and the second semi-tubular portion 3 are joined together by seaming along their respective edges 5 and 6, which are substantially parallel to said longitudinal axis A.
  • the seaming is carried out in such a way that the edges 5 and 6, in the seaming zone, constitute a seal preventing said mixture of air and gaseous fuel from escaping. Furthermore, the seaming may be carried out in such a way that the first semi-tubular portion 2 and the second semi-tubular portion 3 are able to slide relative to each other in a direction parallel to the axis A of the burner body 1. This makes it possible to compensate for the different thermal expansions to which the first semi-tubular portion 2 and the second semi-tubular portion 3 are subjected due to the different temperatures to which they are subjected during operation of the burner.
  • the first semi-tubular portion 2, on which the openings 4 are made is in fact subjected to much higher temperatures than the second semi-tubular portion 3 due to combustion of the mixture of air and gaseous fuel, which occurs in the proximity of the external surface zone of the semi-tubular portion 2 on which the openings 4 are made.
  • Reciprocal sliding movement between the two semi-tubular portions 2 and 3 of the burner body 1 due to different thermal expansions of said portions is marked by S in figure 5.
  • the two semi-tubular portions 2 and 3 may also be made of different materials, using a high quality material with high temperature resistance for the first semi-tubular portion 2, which is subjected to very high temperatures during operation of the burner, and a less high quality material, with lower temperature resistance, for the second semi-tubular portion 3, which is subjected to considerably lower temperatures. This permits a significant reduction in the production costs of the burner.
  • Figures 2, 6 and 7 show a second version of a burner according to the invention comprising a tubular body 1 consisting of four portions, respectively a first body portion 7, a second body portion 8, a third body portion 9 and a fourth body portion 10, all of which are arch-shaped.
  • Each of said body portions is joined to the adjacent portions by seaming along the respective longitudinal edges 12, 13, 14, 15, which are substantially parallel to the longitudinal axis A of the burner body 1.
  • first openings 16 for the outflow and subsequent combustion of a mixture of air and fuel which is introduced into the tubular body 1.
  • second openings 17 for the outflow and subsequent combustion of said mixture of air and fuel.
  • the distribution and/or total area of said second openings 16 is different from the distribution and/or total area of said second openings 17.
  • the seamed joins are made in such a way that the longitudinal edges 12, 13, 14, 15 in the seaming zones constitute a seal preventing said mixture of air and fuel from escaping. Furthermore, the seamed joins can be made in such a way that each burner portion 7, 8, 9, 10 is able to slide relative to the adjacent burner portions, in a direction parallel to the A axis of the burner body 1. The seamed joins of the burner portions make it possible to compensate for the different thermal expansions that said portions undergo due to the different temperatures to which they are subjected during operation of the burner.
  • Said different temperatures depend on whether or not openings 16, 17 for the outflow of said mixture of gaseous fuel and air are present, and on the number, distribution and total area of said openings on burner portions 7, 8, 9, 10.
  • By compensating for the different thermal expansions it is possible to avoid permanent deformations and mechanical stresses in the tubular body 1 of the burner during its operation, thereby significantly increasing the lifetime of the burner. Reciprocal sliding movement between the two adjacent portions 7 and 8 of the burner body 1 due to the different thermal expansions of said portions is marked by S in figure 7.
  • burner body portions 7, 8, 9, 10 from different materials according to their respective operating temperatures, thereby significantly reducing production costs of the burner.
  • At least one flange 18 is made in such a way as to permit reciprocal axial sliding movement of burner body portions 2, 3; 7, 8, 9, 10.
  • the burner portions intended for operation at the highest operating temperatures are fixed with a clearance to said at least one flange 18, with labyrinth seals (not shown) to prevent the mixture of gaseous fuel and air from escaping from said clearances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP99105600A 1999-03-18 1999-03-18 Rohrbrenner Expired - Lifetime EP1036983B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT99105600T ATE246782T1 (de) 1999-03-18 1999-03-18 Rohrbrenner
ES99105600T ES2204016T3 (es) 1999-03-18 1999-03-18 Quemador tubular.
EP99105600A EP1036983B1 (de) 1999-03-18 1999-03-18 Rohrbrenner
DE69910167T DE69910167T2 (de) 1999-03-18 1999-03-18 Rohrbrenner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99105600A EP1036983B1 (de) 1999-03-18 1999-03-18 Rohrbrenner

Publications (2)

Publication Number Publication Date
EP1036983A1 true EP1036983A1 (de) 2000-09-20
EP1036983B1 EP1036983B1 (de) 2003-08-06

Family

ID=8237806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105600A Expired - Lifetime EP1036983B1 (de) 1999-03-18 1999-03-18 Rohrbrenner

Country Status (4)

Country Link
EP (1) EP1036983B1 (de)
AT (1) ATE246782T1 (de)
DE (1) DE69910167T2 (de)
ES (1) ES2204016T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20102001A1 (it) * 2010-10-27 2012-04-28 Worgas Bruciatori Srl Bruciatore cavo a combustione interna
GB2525873A (en) * 2014-05-07 2015-11-11 Worgas Burners Ltd Gas burner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418456A (en) * 1981-11-04 1983-12-06 Robertshaw Controls Company Tubular burner construction and method of making the same
GB2186961A (en) * 1985-12-20 1987-08-26 Bray & Co Ltd Geo Gas burner
WO1992012381A1 (de) * 1991-01-07 1992-07-23 Ruhrgas Aktiengesellschaft Gasbrenner und verfahren zu seinem betreiben
DE29513653U1 (de) * 1995-08-25 1995-11-02 Buderus Heiztechnik Gmbh, 35576 Wetzlar Brennstab für Gasbrenner
DE19547962A1 (de) * 1994-12-21 1996-06-27 Vaillant Joh Gmbh & Co Strahlungsbrenner
DE29707585U1 (de) * 1996-04-18 1997-07-03 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Flächenbrenner
EP0844435A1 (de) * 1996-11-26 1998-05-27 Worgas Bruciatori S.R.L. Gasbrenner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418456A (en) * 1981-11-04 1983-12-06 Robertshaw Controls Company Tubular burner construction and method of making the same
GB2186961A (en) * 1985-12-20 1987-08-26 Bray & Co Ltd Geo Gas burner
WO1992012381A1 (de) * 1991-01-07 1992-07-23 Ruhrgas Aktiengesellschaft Gasbrenner und verfahren zu seinem betreiben
DE19547962A1 (de) * 1994-12-21 1996-06-27 Vaillant Joh Gmbh & Co Strahlungsbrenner
DE29513653U1 (de) * 1995-08-25 1995-11-02 Buderus Heiztechnik Gmbh, 35576 Wetzlar Brennstab für Gasbrenner
DE29707585U1 (de) * 1996-04-18 1997-07-03 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Flächenbrenner
EP0844435A1 (de) * 1996-11-26 1998-05-27 Worgas Bruciatori S.R.L. Gasbrenner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20102001A1 (it) * 2010-10-27 2012-04-28 Worgas Bruciatori Srl Bruciatore cavo a combustione interna
GB2525873A (en) * 2014-05-07 2015-11-11 Worgas Burners Ltd Gas burner

Also Published As

Publication number Publication date
DE69910167T2 (de) 2004-06-09
ES2204016T3 (es) 2004-04-16
EP1036983B1 (de) 2003-08-06
DE69910167D1 (de) 2003-09-11
ATE246782T1 (de) 2003-08-15

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