EP0223634B1 - Brûleur à gaz du type à prémélange gaz/air - Google Patents

Brûleur à gaz du type à prémélange gaz/air Download PDF

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Publication number
EP0223634B1
EP0223634B1 EP86402130A EP86402130A EP0223634B1 EP 0223634 B1 EP0223634 B1 EP 0223634B1 EP 86402130 A EP86402130 A EP 86402130A EP 86402130 A EP86402130 A EP 86402130A EP 0223634 B1 EP0223634 B1 EP 0223634B1
Authority
EP
European Patent Office
Prior art keywords
grille
burner
box
orifices
depressions
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
EP86402130A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0223634A1 (fr
Inventor
Yves Bilcik
Pascal Mignot
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.)
Engie SA
Original Assignee
Gaz de France SA
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 Gaz de France SA filed Critical Gaz de France SA
Priority to AT86402130T priority Critical patent/ATE44814T1/de
Publication of EP0223634A1 publication Critical patent/EP0223634A1/fr
Application granted granted Critical
Publication of EP0223634B1 publication Critical patent/EP0223634B1/fr
Expired 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
    • F23D14/46—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
    • 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

Definitions

  • the present invention relates to a burner of the gas / air premix type.
  • premixed and atmospheric induction burners with partitioned outlet section are known, the relatively simple manufacture of which allows the multiplication of heating points in a hearth.
  • Such burners are commonly used for domestic use, for example water heaters or restaurant hobs, and are often arranged in the form of a ramp.
  • it has the drawbacks of having a low specific power in relation to their size, and of giving rise to flames which can sometimes be unstable.
  • their adjustments are delicate and they can, in practice, operate with satisfactory yields only for a determined feeding regime, which most often requires regulation everywhere or nothing.
  • burner of patent GB-A 1 222 354 is of the stacked structure type comprising a distribution box supplied with a gas / air premix, as well as a flame grid. which may be in the form of a series of superimposed corrugated plates.
  • the gas / air premix burner in accordance with the present invention makes it possible to solve the difficulties mentioned by proposing a burner of simple, robust construction, of small size, and making it possible to modulate the heat flow, thanks to its great flexibility of operation, by delivering significant specific power.
  • the gas burner according to the invention which is of the gas / air premix type supplying a distribution box and consists of a stacked structure comprising said distribution box which has an elongated, flattened shape and which receives, above it, a grid of flames in the form of a thin plate with an upper face and a lower face, said grid comprising at least one series of orifices in the form of slots formed in the lower face of the grid, said orifices which are regularly distributed towards the periphery of this grid, at least along its length, communicating with the interior volume of the distribution box, is characterized in that the slots formed in the underside of this grid have a substantially rectangular section which goes by flaring in the direction of flow of the gas mixture, orifices also in the form of notches, but of substantially rectangular and constant section being formed in the upper face of the same grid, which receives above it a plate of reduced thickness forming a cap from the cap, and in that the upper and lower faces of the grid communicate with each other by a slot made through the
  • a burner according to the invention, identified as a whole 1 and which is constituted by a box 2 forming distribution box in which is disposed a supply tube 3 in a combustible gas mixture, which tube is pierced with orifices 33, 43 through which said combustible mixture flows towards a grid 4 on which slots 5, 6 are formed; said grid being capped with a plate 7 forming a cap.
  • the tube 3 can in particular be screwed, towards the inlet end 23, and substantially in the axis 63 of the box, on the inner wall of the tubular part 53 projecting from said box.
  • the combustible gas mixture (gas / air) which feeds the burner 1 comes from a premix chamber (not shown) connected to the feed tube 3, towards the end 23, via a distribution sheath (not shown).
  • the distribution box 2 has an elongated shape, relatively flattened and of section substantially in "U" shape. It can in particular be manufactured in a foundry or by stamping, thus offering an embodiment which is both simple and inexpensive.
  • the free interior volume forming chamber 12 of the box communicates, through a passage or an elongated slot 22 with the grid 4 and the cap 7.
  • the cohesion of the stacked structure formed by the burner 1 can be ensured by screws which successively link the constituent elements of the burner.
  • This type of assembly being known, only the locations 11 of the screws are advantageously located towards the ends of the burner.
  • the grid 4 is in the form of a plate, preferably metallic substantially rectangular and thin (of the order of a centimeter).
  • this grid are formed series of orifices 5, 6 advantageously formed in slots and which communicate with the interior volume 12 of the box 2.
  • this communication is ensured by an opening 34 formed towards the central part of the grid and which thus forms a passage between the interior volume 12 and the plate 7 forming a cap; said opening being disposed opposite passage 22 formed in box 2.
  • the slots 5, 6 are provided, respectively, on each of the opposite faces 14, 24 of the grid.
  • the slots 5 have a substantially rectangular and constant section, while the slots 6 have a section which is initially rectangular but widens in the direction of flow of the gas mixture, forming expansion chamber 16; said slots 6 having a depth less than that of slots 5, and all being substantially of the same section.
  • the slots 5 and 6 are distributed substantially regularly at the periphery and along the length of the grid 4 opposite the passage 34. L orientation of the slots 5 and 6 is such that they are formed substantially perpendicularly on either side of the longitudinal axis 44 of the support grid 4. In addition, the slots 5 and 6 are preferably of the same number .
  • the burner 1 When the burner 1 is placed in its optimal operating position, that is to say substantially horizontally so that the constituent elements of the burner form a stacked structure based on the box 2 which receives, above it, the grid 4 capped with its cap 7, the slots 5 are arranged on the upper face 14 of the grid; the slots 6 then being formed symmetrically on the underside 24 thereof.
  • the diffuser tube 3 the end opposite to the inlet is closed by a wall, is supplied with a gaseous mixture (gas / air) and is provided with orifices 33 , 43.
  • gaseous mixture gas / air
  • orifices 33 , 43 are substantially regularly distributed in two series 33, and 43 along the major part of said tube. More specifically and advantageously, the orifices of each of the series are distributed linearly and substantially parallel to the longitudinal axis 13 of the tube 3; each series of orifices being further apart angularly about 90 ° .
  • the orifices are directed towards the bottom 42 of the box (2).
  • the orifices 33, 43 of the distributor tube are arranged so that the first orifice is disposed, relative to the wall of the box towards its end d admission 23, at a distance of the order of twice the distance separating two successive orifices, the last orifice being disposed, with respect to the opposite wall 23 ′ of the box, at a distance of the order of four times this gap.
  • the cap 7 which covers the slots 5 of the grid 4 can be in the form of a rectangular metal plate of small thickness and whose dimensions are substantially those of the covered grid.
  • the cap plate 7 can, for example, be made of copper.
  • the burner of the invention delivers its optimal nominal power and offers its best operating flexibility
  • This hat is in the form of substantially a thin rectangular plate whose dimensions are substantially equal to those of the grid which it covers.
  • the wall 28 of the cap 17 is formed back from its face 18 directed towards the grid. This wall extends over the entire width of the plate 17 forming a cap and over most of its length.
  • the intermediate piece 27 comprises, towards its central part, an oblong longitudinal slot 38, which extends over most of the length of the intermediate plate and passes through it over its entire thickness.
  • the slot 38 is arranged opposite the passage 22 of the box 2 and the communication slot 34 of the grid 4.
  • This intermediate piece 27 can optionally be omitted; the grid 4 is no longer then capped only by the cap 17 or else, as shown in FIG. 1, by the cap in the form of a flat plate 7 whose thickness is substantially constant.
  • the combined use of the cap 17 and the intermediate plate 27 leads to an improvement in the calorific power delivered of the order of 10%.
  • the burner which has just been described operates in the following manner: - the distributor tube 3 of the burner 1 is supplied with premix.
  • This air / gas premix can be carried out using a mixer of any known type.
  • the air necessary for combustion is induced by the gas pressure, thus achieving stoichiometric mixing.
  • This mixture is then distributed inside the box 2 in the internal volume 12, forming a distribution chamber, via the tube 3 in which the orifices 33, 43 are pierced.
  • the gas mixture then flows towards the grid 4, the communication passage 22 ensuring its flow from the interior volume 12 to the slots 5, 6 of the grid 4.
  • the flow rate of the gaseous mixture which ignites thanks to the igniter (not shown) provided for this purpose is distributes substantially uniformly over the length of the grid, in the upper 5 and lower 6 slots, the flames catching on the outside of the burner, near said slots.
  • the slots 6 can in particular play the role, thanks to their expansion chamber 16, of piloting the flames; the main flames of the burner then being attached to the outside of the slots 5.
  • a burner according to the invention may, in particular, include a box 2 whose internal volume 12 of distribution of the mixture is of the order of 150 to 250 cm 3 and preferably equal to about 200 cm 3 .
  • the distributor tube 3 is advantageously provided with 26 orifices 33, 43, distributed in two series of 13 and pierced at an apex angle of about 90 ° ; said holes having a diameter of the order of 3 mm and being substantially regularly separated by a distance of approximately 15 mm.
  • a good distribution of the gaseous mixture, over the length of the burner, is ensured when the first hole in each series is housed about 30 mm from the internal wall limiting the interior volume of said box, towards its inlet 23; the last hole being made about 60 mm from the opposite internal wall, towards the end 23 '.
  • the upper slots 5 may be 2 ⁇ 55, and with a rectangular section of the order of 2 ⁇ 3 mm; the lower slots 6, of the same number, first having a rectangular section of approximately 2 x 1.2 mm and then, at the outlet of the expansion chamber 16, a section of approximately 4 x 1.2 mm.
  • the burner that has just been presented can deliver a nominal power of the order of 40 kW / PCS by being supplied with atmospheric induction with natural gas at a pressure of approximately 0.1 to 1.2 bar, or in liquefied petroleum gas at a pressure ranging from about 0.1 to 0.7 bar.
  • the power delivered is important.
  • the flexibility of operation of such a burner allows a modification of the specific power delivered in a ratio of the order of 1 to 20. This makes it possible to design devices for producing heat at low temperature, in particular boilers with distill spirits. At the same time, the good distribution of the heat flow allows the application of such burners, in particular for the heating of molds used in foundries or for the manufacture of ceramics.
  • a particularly advantageous use of the burner of the invention in the industrial field can result from the association of several groups of burners. It is possible in particular to provide groups of two or three burners arranged in parallel, each group having its admission in gaseous mixture and its premix chamber. The groups thus formed will then be distributed over the surfaces to be heated, thus providing a uniform distribution of the heat flow.
  • an installation of this type comprising twenty four burners per series of three, can deliver a power of the order of 800 kW distributed substantially over the entire surface to be heated of a alcohol distillation tank.
  • the burner is arranged and operates in the inverted position, that is to say, upside down, the stack then having the cap as a base; this configuration can further improve the efficiency of the burner by recovering the heat of condensation of the water vapor delivered by combustion.
  • the interignition of these provision may be made for the grid 4 to include slots 15 for passage of said combustible gas mixture.
  • slots are preferably arranged on the face 14 of the grate, towards the end 23 ′ of the burner opposite the inlet 23, and between the two rows of slots 5 formed on either side of the axis 44, said slots forming a corolla.
  • the end part of the supply tube 3, opposite the inlet 23, can extend inside a tubular cavity 53 ' projecting from the box 2; said tube being able to be hollow at its two ends, a plug (not shown) closing its opposite end to the inlet, for example, by screwing on a thread provided for this purpose on the external wall of the cavity 53 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP86402130A 1985-10-16 1986-09-30 Brûleur à gaz du type à prémélange gaz/air Expired EP0223634B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402130T ATE44814T1 (de) 1985-10-16 1986-09-30 Gasbrenner der gas/luftvormischungsbauart.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8515337 1985-10-16
FR8515337A FR2588638B1 (fr) 1985-10-16 1985-10-16 Bruleur a gaz du type a premelange gaz/air

Publications (2)

Publication Number Publication Date
EP0223634A1 EP0223634A1 (fr) 1987-05-27
EP0223634B1 true EP0223634B1 (fr) 1989-07-19

Family

ID=9323877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402130A Expired EP0223634B1 (fr) 1985-10-16 1986-09-30 Brûleur à gaz du type à prémélange gaz/air

Country Status (5)

Country Link
EP (1) EP0223634B1 (es)
AT (1) ATE44814T1 (es)
DE (1) DE3664528D1 (es)
ES (1) ES2003142A6 (es)
FR (1) FR2588638B1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8719655D0 (en) * 1987-08-20 1987-09-30 Gas Logs Brailsford Ltd Gas burner
TWI692382B (zh) * 2016-01-27 2020-05-01 史達克公司 高熵合金絲及多主元合金絲，及其預形成物、製造方法和應用

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137098A1 (en) * 1983-07-28 1985-04-17 Bloom Engineering Company, Inc., Adjustable flame burner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494243A (en) * 1944-07-31 1950-01-10 Louis D Houlis Pressure ribbon-type gas burner
GB1222354A (en) * 1967-03-13 1971-02-10 Barter And Sons Ltd Improvements in or relating to aerated gas burners

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137098A1 (en) * 1983-07-28 1985-04-17 Bloom Engineering Company, Inc., Adjustable flame burner

Also Published As

Publication number Publication date
DE3664528D1 (en) 1989-08-24
EP0223634A1 (fr) 1987-05-27
FR2588638B1 (fr) 1989-03-03
ATE44814T1 (de) 1989-08-15
ES2003142A6 (es) 1988-10-16
FR2588638A1 (fr) 1987-04-17

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