EP1055084B1 - Procede de chauffage de produits dans une enceinte et bruleur pour la mise en oeuvre de ce procede - Google Patents

Procede de chauffage de produits dans une enceinte et bruleur pour la mise en oeuvre de ce procede Download PDF

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Publication number
EP1055084B1
EP1055084B1 EP99900951A EP99900951A EP1055084B1 EP 1055084 B1 EP1055084 B1 EP 1055084B1 EP 99900951 A EP99900951 A EP 99900951A EP 99900951 A EP99900951 A EP 99900951A EP 1055084 B1 EP1055084 B1 EP 1055084B1
Authority
EP
European Patent Office
Prior art keywords
burner
region
chamber
oxidizer
outlet
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 - Lifetime
Application number
EP99900951A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1055084A1 (fr
Inventor
Celso Zerbinatti
Dominique 8 résidence des Pépinières ROBILLARD
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Filing date
Publication date
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Publication of EP1055084A1 publication Critical patent/EP1055084A1/fr
Application granted granted Critical
Publication of EP1055084B1 publication Critical patent/EP1055084B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/006—Combustion apparatus characterised by the shape of the combustion chamber the chamber being arranged for cyclonic combustion
    • 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other

Definitions

  • the invention relates to a method of heating products in an enclosure itself heated by burner (s) and more particularly a process for heating products including glassmakers to work, and a burner for setting work of this process.
  • glass products must be taken in a broad sense including in particular the glassware and glassware products crystal.
  • the enclosures internally have a general shape approximately cylindrical of revolution and their wall is crossed outlet (x) or is housed an end portion of a burner.
  • the ports are distributed along the length of the enclosure along one or more generators of the cylinder, and they go right through the wall not radially but in a direction allowing a connection almost tangent from an inner side wall of the quill to the inner wall of the enclosure approximately cylindrical.
  • Burners with the end part housed in such openers are generally of a type known as “tube in tube”, that is to say that they have a structure coaxial bitubes of generally cylindrical shape (see eg US-A-5,199,866); these burners heat the enclosure locally, the distribution of the enclosure in the refractory lining of the wall being very inhomogeneous, the hottest region being the one that is in alignment with the longitudinal axis of the workman and immediately around.
  • the implementation of so-called "multi-hole” burners do not seem to have led so far reliably to better heating homogeneity of the inner wall of the enclosure.
  • the invention therefore aims to create a process and a burner thanks to which the internal wall of the enclosure is homogeneously heated and offering good safety of implementation.
  • the object of the invention is to design a burner providing a flame likely to adapt to the shape of the inner wall of the enclosure.
  • the method and the burner according to the invention can also be used for a lot of other applications, and one can in particular consider maintaining the glass temperature at the distributors, known in the technique under the name of "feeders”, glass ovens, as well as the areas of rolling, re-burning, and cutting of the glass, without the presence of "darts”.
  • the invention relates to a method of heating of products in an enclosure by means of at least a flame produced by a burner housed at least partially in a housing in a wall of the enclosure possibly through an added workman, process in which an entry region is introduced from the burner separate streams of combustible gas under pressure and oxidizing gas under pressure, it is transmitted in the burner separately these two gas streams at separate chambers by means of which the respective pressures of the two gas streams, we evacuate towards a burner outlet region the gases from the chambers balancing into two separate currents, and we project the two pressurized gas streams out of the burner in pairs respective separate and adjacent outlet slots provided in the exit region, in the form of two streams adjacent laminaria, in a flame, to mix the two gas only partially in the flame so that this presents a flame profile having a region where the oxidizer is in excess and which in turn determines a oxidative enclosure region and at least one region where the oxidizer is in default and which in turn determines a reducing enclosure region.
  • the invention also relates to a burner for production of a flame in a heating chamber of produced from two gas streams from a region burner outlet, comprising two separate inlet channels for combustible gas respectively under pressure and for an oxidizing gas under pressure, at least two separate balancing chambers respectively for the fuel and oxidizer and one connected to the channel inlet for fuel and the other to the inlet channel for the oxidizer, and two separate outlet channels respectively for fuel and for oxidizer and connected one to the room for the fuel and the other to the room for the oxidizer, opening out of the burner into the outlet region of it by two adjacent slots, at least the two outlet channels being separated by a partition having opposite walls delimiting respectively the outlet channel for fuel and outlet channel for fuel the oxidizer with a respective burner wall opposite the partition.
  • the position of the burners can be turned upside down so that the relative position of the flame region where the oxidizer is in excess and the flame region where the oxidizer is in default is reversed.
  • balancing chambers are made up of cascading compartments connected by conduits facilitate pressure balancing and avoid formation of a so-called "pointed" flame.
  • the burner shown in Figure 1 in section longitudinal by a plane which is generally vertical when the burner equips a cylindrical enclosure whose axis central extends horizontally as shown schematically in Figure 4, externally approximately the shape of a parallelepiped, two of which parallel edges are replaced by bevels.
  • This burner is intended to be traversed by a stream of pressurized combustible gas and a stream of oxidizing gas under pressure brought into its inlet region by separate supply lines, and out of suitably by separate orifices arranged in its exit region, according to the invention, without having been previously mixed.
  • the burner has two channels input 1, 2 separate for fuel and for the oxidizer, opening into one of the burner faces (entrance face), to which two rooms are connected respective 3, 4 pressure balancing also separate, or two separate groups of balancing chambers.
  • the inlet channels open into their respective balancing chamber, they have a section narrowed to determine an abutment shoulder for the end of their supply line.
  • Two separate output channels 5, 6 respectively for the fuel and for the oxidizer are connected the first to chamber 3 for fuel and the second to room 4 for the oxidizer. These channels lead out of the burner, in the outlet region thereof, in pairs orifices in the form of two adjacent slots 7, 8 made in the opposite side of the burner and parallel to the entry face (exit face).
  • the burner is preferably made up of several pieces assembled and then includes two half-burners arranged one for the passage of fuel and the other for the passage of the oxidizer.
  • an intermediate piece 9 is inserted between the two half-burners to serve as a partition between them, which allows at least the channels of outlet 5, 6 in the form of recesses in the faces in look of the two burners, and as in the figures, also compartments 3A, 3B, 4A, 4B of chambers 3, 4 pressure balancing.
  • the two half-burners being placed opposite with their corresponding recesses opposite, the channels of exit 5, 6 and possibly the compartments of the rooms 3, 4 are delimited on one side by a wall of the partition 9 and on the opposite side by a wall of the half-burner, which extend to the exit face, in the exit region of the burner.
  • the balancing chambers 3, 4 have several compartments, here two compartments 3A, 3B, 4A, 4B, are succeeding upstream downstream of the housing and connected by conduits 3C, 3D.
  • the walls of the partition 9 are approximately planar and parallel, and the same is true the wall of each chamber 3, 4 and each channel of outlet 5, 6 which is opposite the partition.
  • this facing wall may be inclined, and especially that of the outlet channel can converge in the partition 9 in the direction of the outlet face; in these conditions, the general directions of the two output channels are very slightly convergent.
  • the height of the slots 7, 8 is of the order of a tenth from millimeter to a few millimeters and in general in the range from 0.2 to 5.0 mm; it is preferably in the range from 0.4 to 3.0 mm, for example 0.4 to 1.5 mm for a fuel consisting of natural gas and 1 mm to 3.0 mm for a oxidizer consisting of oxygen.
  • the slits extend a few centimeters, and generally over most of the length of the exit face, for example 160 mm for a long face of 170 mm.
  • Obtaining a suitable flame is also related to the ratio between the length of each output channel and the height of the corresponding slot.
  • a "length of report channel / slot height" "equal to at least approximately 20 seems necessary to properly evacuate each of the two gas streams in the flame.
  • Compartments 3A, 3B, 4A, 4B of the two chambers of each half-burner are here of general shape parallelepipedic and of approximately equal dimensions, namely fifteen millimeters upstream downstream and one ten millimeters high; compartments extend approximately the same distance as the canals of exit 5, 6.
  • the conduits 3C, 4C connecting the compartments have a length of a few millimeters, for example 2 to 3 mm, and a section of a few square millimeters, for example 3 to 10 mm 2 ; they are distributed approximately regularly over the width of the compartments, and here there are 8 conduits 3C, 4C at a pitch of about twenty millimeters.
  • these dimensions correspond to an example application and can be modified in such a way so that the pressure balancing chambers 3, 4 fulfill their role of avoiding the passage preferential fluids below the inlet, and at provide a uniform "knife" flame whose profile is straight.
  • conduits 3C, 4C are away from the corresponding output channel 5, 6, and particular of the partition 9; preferably they extend in a region between two compartments so as to make communicate these near their wall belonging to the half-burner; advantageously, they are constituted by cylindrical drilling approximately tangent to this wall.
  • the bevels 10 connect the outlet face of the burner respectively to the faces parallel to the partition.
  • the angle ⁇ of each beveled face 10 relative to the face parallel to the partition to which it ends is approximately 30 °.
  • the presence of the bevels 10 makes it possible to insert the burner at least partially in a housing provided in a wall of the enclosure or in an added opener housed in the enclosure, itself presenting interior faces 11 inclined going converging towards the interior of the enclosure by determining between the bevels 10 of the burner and the interior surfaces 11 of the housing of the enclosure or the outlet, at least one channel and preferably two channels 12 respective where we introduce by induction one or two outside air flow (s) towards the interior of the enclosure. If the dimensions and angles are suitably chosen, the air flow induced by effect Venturi between burner bevel and housing, both streams of pressurized gas projected out of the burner allows noticeable cooling of it in its region of exit.
  • each bevel 10 of the outer surface of the burner and the face interior 11 of the housing opposite is about ten degrees, and the burner outlet face is set back at the interior of the accommodation, from a distance of approximately the range from a few tenths of a millimeter to ten millimeters.
  • the burner can be housed directly in the refractory wall of the enclosure or in an attached piece serving as a workman; this second solution allows the control of the wear of this part, which is consumable.
  • this burner structure allows, thanks to the shape of the slots 7, 8, to obtain a flat flame; moreover, an appropriate dimensioning such as those which have been given by way of example allows this flame to be obtained either soft and asymmetrical.
  • the flame 14 follows the shape inner circular of the enclosure by defining therein on one side an oxidizing zone 15 and on the other a zone reducing 16.
  • the oxidizer is introduced from the side from the center of the enclosure 13, and the fuel from the side of the wall, we obtain in the enclosure an oxidizing central region allowing optimal treatment of glass or crystal articles.
  • the fuel is trapped between the oxygen slide and the wall, which allows its complete combustion. This reduces oxide emissions of carbon to the room where the enclosure is located.
  • the flame asymmetry reduces production nitrogen oxides.
  • the externally symmetrical structure of the burner allows you to turn it face to face in its housing therefore to reverse the oxidizing region and the region reducing in the enclosure, which offers great flexibility of use since it allows to create at will above glass a reducing or oxidizing atmosphere.
  • the invention can be implemented for maintaining the temperature of the so-called dispensers "feeders" for glass ovens, which are currently heated generally by air-fuel burners which have a high consumption (they work with cold air), which generate a great volatilization of the glass and in particular borosilicates, which have a corrosive action, which have a operation can be dangerous because it is premix burners, which emit large amounts of harmful gases in the room.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
EP99900951A 1998-02-10 1999-01-19 Procede de chauffage de produits dans une enceinte et bruleur pour la mise en oeuvre de ce procede Expired - Lifetime EP1055084B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9801556 1998-02-10
FR9801556A FR2774745B1 (fr) 1998-02-10 1998-02-10 Procede de chauffage de produits dans une enceinte et bruleur pour la mise en oeuvre de ce procede
PCT/FR1999/000092 WO1999041548A1 (fr) 1998-02-10 1999-01-19 Procede de chauffage de produits dans une enceinte et bruleur pour la mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP1055084A1 EP1055084A1 (fr) 2000-11-29
EP1055084B1 true EP1055084B1 (fr) 2001-12-12

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Application Number Title Priority Date Filing Date
EP99900951A Expired - Lifetime EP1055084B1 (fr) 1998-02-10 1999-01-19 Procede de chauffage de produits dans une enceinte et bruleur pour la mise en oeuvre de ce procede

Country Status (9)

Country Link
EP (1) EP1055084B1 (cs)
CN (1) CN1290333A (cs)
BR (1) BR9907802A (cs)
CZ (1) CZ297869B6 (cs)
DE (1) DE69900591T2 (cs)
ES (1) ES2169941T3 (cs)
FR (1) FR2774745B1 (cs)
PT (1) PT1055084E (cs)
WO (1) WO1999041548A1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9930562D0 (en) * 1999-12-23 2000-02-16 Boc Group Plc Partial oxidation of hydrogen sulphide
GB2449267A (en) * 2007-05-15 2008-11-19 Alstom Technology Ltd Cool diffusion flame combustion
EP3715713A1 (en) * 2019-03-26 2020-09-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Compact flame-curtain burner, method for operating the burner and use of the method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE413283C (de) * 1925-05-05 Faconeisen Walzwerk L Mannstae Gasfeuerung fuer Dampfkessel und Drehtrommeln
DE8528265U1 (de) * 1985-10-04 1985-12-19 Messer Griesheim Gmbh, 6000 Frankfurt Außenmischender Brenngas-Sauerstoff-Brenner
US5302112A (en) * 1993-04-09 1994-04-12 Xothermic, Inc. Burner apparatus and method of operation thereof
DE19704802A1 (de) * 1997-02-08 1998-08-13 Ruhrgas Ag Vorrichtung und Verfahren zum Verbrennen von Brennstoff

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments

Also Published As

Publication number Publication date
WO1999041548A1 (fr) 1999-08-19
CZ297869B6 (cs) 2007-04-18
PT1055084E (pt) 2002-05-31
CZ20002795A3 (cs) 2001-08-15
FR2774745A1 (fr) 1999-08-13
ES2169941T3 (es) 2002-07-16
DE69900591D1 (de) 2002-01-24
FR2774745B1 (fr) 2000-03-17
CN1290333A (zh) 2001-04-04
EP1055084A1 (fr) 2000-11-29
BR9907802A (pt) 2000-10-17
DE69900591T2 (de) 2002-07-18

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