CA1138323A - Burner designed to produce a wide flame - Google Patents

Burner designed to produce a wide flame

Info

Publication number
CA1138323A
CA1138323A CA000359083A CA359083A CA1138323A CA 1138323 A CA1138323 A CA 1138323A CA 000359083 A CA000359083 A CA 000359083A CA 359083 A CA359083 A CA 359083A CA 1138323 A CA1138323 A CA 1138323A
Authority
CA
Canada
Prior art keywords
burner
passage
opening
ridge
diverging
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
Application number
CA000359083A
Other languages
French (fr)
Inventor
Georges Lorek
Joel Blondet
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij 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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Application granted granted Critical
Publication of CA1138323A publication Critical patent/CA1138323A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • F23D14/56Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/62Mixing devices; Mixing tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D91/00Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

ABSTRACT

The present invention relates to a burner designed to produce a wide flame.
This burner comprises a burner body for imparting rotation to a mixture of fuel gas and air and a burner head integral with the burner body and comprising a generally spherical interior chamber connected to the burner body by means of a passage which converges in the direction of the chamber; and an elongated opening which can generate the flame, which is connected to the chamber by means of a passage which diverges in the direction of the opening, one large side of the opening comprising a first ridge and a curved section and the other large side of the opening comprising a second ridge.
Application mainly in the firing of metal or glass products.

Description

~ ~ ~ K 6366 B~RNER DESIGN13D TO PRODUCE A WID13 FLAME

The present invention relates to a burner designed to produce a wide and adjustable flame and ~hich is par-ticularly suitable for firing metal or glass products.
In order -to carry out the firing wi-th a wide flame of products, in particular glass products, by -the "burning"
technique use has so far been made of oxygen burners the main drawback of which is the high firing cost.
The object of the invention is to obviate this drawback by proposing a novel burner which operates on a mixture of fuel gas and air and which is capable of producing a wide flame of varying thickness.
The burner according to the invention permits complete firing at elevated temperature, even in -the open air, of products having a length-width ratio or which are very thin, while these products pass along or rotate in front of the burner or the local heating of more solid products. This burner may also be used in an enclosed firing space where the temperatures achieved could be higher but where the local heating possibili-ties will be more limited.
A burner of this type will -therefore preferably be used for the "reburning" of glass products, although it can equally well be used as open forging furnace or as burner for a kiln for ceramic produc-ts in which a thin, wide flame is required.
The burner according to the invention is based on the flow of a homogeneous mixture of air and fuel gas introduced through a burner body fixed to a burner head having an opening of a suitable asymmetrical shape which makes it possible to ob-tain a wide flame of more or less rectangular cross-section in the direction of flow and which, under certain conditions, can even be triangular like the tip-like flame of an intensive burner.

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The present invention relates more in particular to a b~rner designed to produce a wide flame, comprising a burner body for imparting rotation -to a mixture of f`uel gas and air and a burner head integral with the burner body, characterized in that -the burner head comprises a generally spherical in-terior chamber connected to -the burner body by means of a passage which converges in the direction of the chamber, and an elonga-ted opening which can generate -the flame, which is connected to the chamber by means of a passage which diverges in -the direction of the opening, one large side o-f the opening com-prising a first ridge and a curved section and the other large side of the opening comprising a second ridge.
The -f`irst ridge and the second ridge of the opening permit limited displacement in relation to each other depending on -the shape which it is desired to give -to the flame.
In a preferred embodimen-t of the invention the diverging passage comprises two opposite parallel walls connected at the two large sides of the opening and -the converging passage has an axis of` rotation normal to the two parallel walls opposite the diverging passage.
According to another characteristic of -this embodiment the interior chamber is spherical and the head of the burner is formed of two parts of which one comprises the converging passage, one of the parallel walls opposi-te the diverging passage and a spherical semi-dome forming one half of` the interior chamber and the other part comprises the o-ther parallel wall opposite the diverging passage, the -two diverging walls of the diverging passage and a spherical semi-dome forming the other half of the interior chamber.
The burner according to -the invention also comprises fixing means which can in-terconnec-t the two parts of -the burner head so -that they can be adjusted by sliding -the two parts along a ma-ting plane parallel to the parallel walls opposite the di-verging passage.

~3i~ 3 The first ridge of the opening preferably comprises a stepped section.
The burner head of -the invention is preferably made of a refractory material~ although it may also be made of a metal which is cooled by fluid circulation.
This burner head can be a separate unit or be in-tegral with a more complex unit, for example a furnace wall.
Other charac-teristics and advantages of the invention will be more clearly understood from the following description with reference to -the at-tached drawings given solely by way of non-limitative example, in which:
Fig. 1 is a perspective view of a burner according to the invention showing a detached part of the head of -the burner;
Fig. 2 is a cross-sec-tion taken on line II-II of Fig. 1 and showing the shape of the converging passage, of the in-terior chamber and pf the diverging passage of -the burner head;
Fig. 3 is a bottom view in perspective of the part of the burner head of Figs. 1 and 2, which supports -the burner body;
and Fig. 4 is a -top plan view in perspective of the o-ther part of the burner head.
In these Figures the same reference numbers designa-te the same elements.
The burner shown in Fig. 1 comprises a burner body 10 which is capable of imparting ro-ta-tion to a mixture of fuel gas and air and a burner head 12 integral with the burner body 10. The burner body 10 is a metal burner body, of a kno~m type, of mechanically assembled and welded construc-tion or of cast metal and comprising a cylindrical tube 1l~ which extends.into a converging tube 16 having the shape of a truncated cone which is in -turn connec-ted to an annular flange 18 which is perfora-ted by securing openings such as 20 and 22by means cf~hich the burner body 10 can be secured on to the burner head 12.

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The upstream par-t of -the burner body 10 comprises a -tangential tube 24 to admi-t air, a plug 26 which supports a fuel gas injec-tion tube 28 and which is secured to a circular locking plate 30 of the burner body 10. This burner body therefore permi-ts the combustion air and the fuel gas, the la-tter directly to be brought into rotation a-t the inlet of the burner head 12.
The burner head 12 comprises two asymme-trical parts 32 and 34 which are interconnected by suitable mechanical securing means along a mating plane 36 which is normal to the axis XX
of the burner body 10. These securing means could, for example, be flanges ensuring that the sections 32 and 34 are so tightened that they can be adjusted by sliding along the mating plane 36.
The -two sections 32 and 34 of the burner head 12 are made of light refractory material of a composition sui-table to with-stand the high temperatures in the order of 1500C to which they will be subjected.
By way of example -these two parts can be obtained by casting a light refractory paste which, after baking, has a voluminal mass between 1.2 and 1.8 kg/drn3 and preferably 1.5 kg/dm3. Such a refractory paste can,for example, be obtained by mixing Chamotte blis-ter alumina and high-temperature cement.
As indicated before, the two parts of the burner head may also be composed of metal sections provided with cooling means.
The upper part 32 comprises stud bolts such as 38 and ~0 which are capable of securing the annular flange 18 of the burner body 10 onto the burner head 12. The par-ts 32 and 31l of the burner head 12 are obtained by casting in such a way that characteristic recesses are formed which, af-ter assembly of the two parts, will form -the converging passage, the interior chamber and the diverging passage sui-table for producing the desired flame.
The part 32 comprises a converging passage 1l2 presenting a revolving symmetry in relation to the axis XX and formed by a ,. . : ~

32~

truncated cone. This converging passage has an inlet 44 designed to be connected -to the outlet of the burner body 10 and ~m out-let 46 which debouches into the inlet of a spherical semi-dome 48 which is a,lso provided in the part 32 and of which the median plane coincides with the above-mentioned m~ting plane 36.
This spherical semi-dome 48 forms half of a spherical interior chamber 50 arranged in the burner head 12. Similarly, the part 32 comprises a wall 52 which forms one of the two parallel walls opposite a diverging passage 54 which communicates lO with the chamber 50 and debouches to the outside. This wall 52 has a flat section which communicates with the interior chamber 50 and ends in a curved section 56 which is ridge-shaped and comprises the long side of an elonga-ted opening 58 which debouches to the ou-tside. The wall 52 is si-tuated in the mating plane 36 15 between the parts 32 and 34.
The part 34 comprises a spherical semi-dome 60 of which the virtual, rnedian plane corresponds with the rtating plane 36 and which -thus forms with the spherical semi-dome 48 the above-mentioned cha,mber 50. The sides of the diverging passage 54 are 20 limited by two diverging planar walls 62 and 64 connec-ting the interior chamber 50 to both short sides 66 of the opening 58. In Figs. 1 and 4, only one o-f the shor-t sides 66 of the opening 58 is visible. These walls 62 and 64 are tangen-tial to the spherical c~mber 50 and widen ou-t as they lead to the small sides of the 25 sli-t 58 (see Fig. 4). The passage 54 is furthermore limited by a parallel wall opposite the wall 62 of -the par-t 32. This wall obtained by casting with the part 3li comprises a flat par-t 68 pa,rallel to the wall 52, which communicates wi-th the interior chamber 50. This waLl also comprises a stepped section 70 com-30 prising two steps, and a curved part 72 connected to -the stepped part 70 along a ridge 74 forming a constriction with the flat part 52. This curved part 72 is opposite the curved, ridge-shaped section 56 of -the part 32.

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The relative position of the parts 32 and 34 may be ad-justed to modif'y the distance between the ridge 74 and the ridge 56 by slig~htly shifting them in order thereby to give the flame -the desired shape. Once this distance has been set, it suf~ices to main-tain the parts 32 and 34 tightly -together by way of the above-mentioned fixing means.
It will be no-ted from Figs. 1 and 2 tha-t at the side of the opening 58 the part 32 has a rounded front 76, whereas the part 34 has a straight front 78. The presence of the rounded front 76 is not indispensable, but forms a preferred embodiment which protects the flame emerging from the opening 58.
The rotating mixture of' air and gas is accelerated in -the converging passage 42 and subsequently enters the chamber 50 where the rotational movement of the mixture is changed into 15 a lateral movement towards the diverging passage 5L~. The firs-t part of this passage 54 which is situa-ted be-tween the wall 52 and the flat part 68 comprises a fla-t mixing chamber. This mixing chamber widens in the direc-tion of -the opening 58 as far as the s-tepped por-tion 20 designed to obtain the desired 20 flows of the fuel mixture as well as homogeniza-tion of the latter. This diverging passage passes the gaseous fuel mixture to the opening 58 while producing a flame adjustable according to the gas flow volumes.This flame is par-tly slowed down by the Coanda effect over the curved par-t 72 and stabilized by 25 the turbulent movement produced by the ridge 56 and adjustable according to the shape of the flame -to be obtained by sliding the parts 32 and 34 along the mating plane 36.
The burner according to -the invention can be used alone or with other similar burners for the firing of produc-ts such as metal and glass products in open forging f'urnaces or in ~ilns for certain products. The burner can be placed in different positions and in different places in a furnace. It will be clear that -the present invention is not limited to the above-described embodiment but that it is quite possible, withou-t departing - ~

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from -the scope of the presen-t invention, to devise various de-tail variants.
Thus i-t will be clear that the axis of -the converging passage can be loca-ted differen-tly in rela-tion to the diverging passage and that the shape of' the i~terior chamber canno-t only be spherical but also ellipsoidal or of any similar rounded shape.

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,. . . .

Claims (9)

The embodiments of the invention in which an exclusive pro-perty or privilege is claimed are defined as follows:-
1. A burner designed to produce a wide flame, comprising a burner body for imparting rotation to a mixture of fuel gas and air and a burner head integral with the burner body, characterized in that the burner head comprises a generally spherical interior chamber connected to the burner body by means of a passage which converges in the direction of the chamber; and an elongated opening which can generage the flame, which is connected to the chamber by means of a passage which diverges in the direction of the opening, one large side of the opening comprising a first ridge and a curved section and the other large side of the opening comprising a second ridge.
2. A burner as claimed in claim 1, characterized in that the first ridge and the second ridge are displaced in relation to each other.
3. A burner as claimed in claim 1, characterized in that the diverging passage comprises two opposite parallel walls connected at the two large sides of the opening and that the converging passage has an axis of rotation normal to the two parallel walls opposite the diverging passage.
4. A burner as claimed in claim 1, characterized in that the interior chamber is spherical.
5. A burner as claimed in claim 3, characterized in that the burner head if formed of two parts of which one comprises the converging passage, one of the parallel walls opposite the diverging passage and a spherical semi-dome forming one half of the interior chamber and the other part comprises the other parallel wall opposite the diverging passage, the two diverging walls of the diverg-ing passage and a spherical semi-dome forming the other half of the interior chamber.
6. A burner as claimed in claim 5, characterized in that it comprises fixing means which can interconnect the two parts of the burner head so that they can he adjusted by sliding the two parts along a mating plane parallel to the parallel walls opposite the diverging passage.
7. A burner as claimed in claim 1, characterized in that the first ridge comprises a stepped section.
8. A burner as claimed in claim 1, 2 or 3, characterized in that the burner head is made of a refractory material.
9. A burner as claimed in claim 1, 2 or 3, characterized in that the burner head is made of a metal cooled by fluid circulation.
CA000359083A 1979-10-03 1980-08-27 Burner designed to produce a wide flame Expired CA1138323A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7924617 1979-10-03
FR7924617A FR2466707A1 (en) 1979-10-03 1979-10-03 BURNER FOR THE PRODUCTION OF A LONGILINE FLAME

Publications (1)

Publication Number Publication Date
CA1138323A true CA1138323A (en) 1982-12-28

Family

ID=9230262

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000359083A Expired CA1138323A (en) 1979-10-03 1980-08-27 Burner designed to produce a wide flame

Country Status (5)

Country Link
JP (1) JPS5661511A (en)
CA (1) CA1138323A (en)
DE (1) DE3037106A1 (en)
FR (1) FR2466707A1 (en)
GB (1) GB2062211B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2065224B1 (en) * 1992-05-05 1997-09-01 Marty Ginesta Pierre MOUNTING DEVICE FOR A GAS BURNER CARBURETOR.
CN101737777B (en) * 2008-11-12 2012-10-17 中国市政工程华北设计研究院 Burner used for fuel gas distribution and exchangeability test

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE559758C (en) * 1932-09-23 Gotthold Schmid Gas burner
US1912730A (en) * 1932-04-11 1933-06-06 Harold D Schrader Gas burner and mixing chamber therefor
FR1226601A (en) * 1959-02-24 1960-07-13 Fuel gas flame stabilization
FR1295509A (en) * 1961-04-24 1962-06-08 Ceramiques Et Tech Soc Et Improvements to gas oven burners
US3477646A (en) * 1967-01-06 1969-11-11 Union Carbide Corp Scarfing unit
DE2033118A1 (en) * 1970-07-03 1972-01-05 Pensenskij Kompressornyj Sawod Gas burner

Also Published As

Publication number Publication date
FR2466707A1 (en) 1981-04-10
FR2466707B1 (en) 1984-12-07
JPS5661511A (en) 1981-05-27
GB2062211A (en) 1981-05-20
GB2062211B (en) 1983-08-24
DE3037106A1 (en) 1981-04-30

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