EP1055084A1 - 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 procedeInfo
- Publication number
- EP1055084A1 EP1055084A1 EP99900951A EP99900951A EP1055084A1 EP 1055084 A1 EP1055084 A1 EP 1055084A1 EP 99900951 A EP99900951 A EP 99900951A EP 99900951 A EP99900951 A EP 99900951A EP 1055084 A1 EP1055084 A1 EP 1055084A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- enclosure
- region
- outlet
- wall
- 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
Links
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 process for heating products in an enclosure which is itself heated by burner (s) and more particularly to a process for heating products, in particular glassware to be worked, and a burner for implementing this process.
- glass products must be taken in a broad sense including in particular the products of the glassware sector and those of the crystal industry.
- the enclosures have internally an approximately cylindrical general shape of revolution and their wall is crossed by a workpiece (x) or is housed an end part of a burner.
- the ports are distributed over the length of the enclosure along one or more generatrices of the cylinder, and they pass right through the wall not radially but in a direction allowing an almost tangent connection of an internal lateral wall of the opening to the internal wall of the approximately cylindrical enclosure.
- the burners are generally of a type known as "tube in tube”, that is to say that they have a coaxial twin-tube structure of generally cylindrical shape; these burners heat the enclosure in a localized manner, the distribution of the enclosure in the refractory lining of the wall being very inhomogeneous, the hottest region being that which is in alignment with the longitudinal axis of 1 and immediately around.
- the use of so-called "multi-hole” burners does not seem to have led hitherto reliably to a better homogeneity of heating of the interior wall of the enclosure.
- the object of the invention is therefore to create a method and a burner by which the internal wall of the enclosure is homogeneously heated and having good processing safety.
- the object of the invention is to design a burner providing a flame capable of adapting to the shape of the internal wall of the enclosure.
- the method and the burner according to the invention can also be used for a large number of other applications, and it is in particular possible to envisage keeping the glass at temperature at the level of the distributors, known in the art under the name of "feeders", glass furnaces, as well as the fields of rolling, re-burning, and cutting of glass, without the presence of "darts”.
- the invention relates to a method of heating products in an enclosure by means of at least one flame produced by a burner housed at least partially in a housing formed in a wall of the enclosure possibly via '' an attached burner, characterized in that one introduces into a burner inlet region separate streams of pressurized combustible gas and pressurized oxidant gas, these two streams of gas are transmitted separately to the burner separate chambers by means of which the respective pressures of the two gas streams are balanced, the gases from the balancing chambers are discharged to two burner streams to a burner outlet region, and the two streams of pressurized gas are projected out of the burner by two respective separate and adjacent outlet slots formed in the outlet region, in the form of two adjacent laminar streams, in a flame, to mix the two gases only partially in the flame so that it has a flame profile having a region where the oxidant is in excess and which in turn determines a region of oxidizing enclosure and at least one region where the oxidizer is at fault and which in turn determines a region
- the method according to the invention can also have one or more of the following characteristics:
- the two streams of pressurized gas are projected out of the burner into an enclosure internally of generally approximately cylindrical shape, transversely and approximately tangentially so that the flame matches the interior circular shape of the enclosure by defining therein on one side an oxidizing region and the other a reducing region; - Also introduced into the enclosure, by at least one determined channel between an outer face of the burner and an inner face of the housing of the enclosure or of a workpiece, a current of air induced by the two streams of pressurized gas thrown out of the burner; - One also introduces into the enclosure, by two determined channels each between an outer face of the burner and an inner face of the housing of the enclosure or of the workpiece, two induced air currents on either side of the two currents respectively adjacent combustible and oxidizing gas.
- the invention also relates to a burner for producing a flame in a chamber for heating products from two gas streams coming from an outlet region of the burner, characterized in that it comprises two inlet channels separated respectively for a pressurized combustible gas and for a pressurized oxidizing gas, at least two balancing chambers separated respectively for the fuel and for the oxidant and connected one to the inlet channel for the fuel and the other to the inlet channel for the oxidant, and two separate outlet channels respectively for the fuel and for the oxidant and connected one to the chamber for the fuel and the other to the chamber for the oxidant, opening out of the burner into the outlet region thereof by two adjacent slots, and in that at least the two outlet channels are separated by a partition having opposite walls delimiting respectively the outlet channel tie for the fuel and the outlet channel for the oxidant with a respective burner wall opposite the partition. Thanks to this structure, the position of the burners can be turned upside down so that the relative position of the region of the flame where the oxidant is in excess and of the region of the flame
- Each balancing chamber has at least two compartments which follow one another upstream downstream of the burner and are connected by conduits; the conduits extend in a region between two compartments by communicating these near a wall of the burner opposite a partition between the chambers respectively for the fuel and for the oxidant; - the walls of the partition are approximately flat and parallel;
- each outlet channel which is opposite a wall of the partition is approximately flat and parallel to this wall of the partition; - The wall of each outlet channel which is opposite to a wall of the partition extends in the direction of the outlet region by converging very slightly with this wall of the partition; the outlet channels extend towards the outlet region in very slightly convergent directions;
- the slots have a height of one order of a tenth of a millimeter to a few millimeters; the slots have a length of several centimeters; - the rooms include approximately parallelepiped compartments;
- balancing chambers consist of cascade compartments connected by conduits facilitates pressure balancing and prevents the formation of a so-called "pointed" flame.
- FIG. 1 is a schematic longitudinal section of a burner according to the invention, showing the positioning of the latter in the wall of the heating enclosure,
- FIG. 2 is a schematic front view of the burner of FIG. 1,
- - Figure 3 is a schematic top view of the burner of Figure 1
- - Figure 4 is a schematic cross section of a heating enclosure showing the operation according to the method according to the invention, of the burner of Figures 1 to 3.
- This burner is intended to be traversed by a stream of pressurized combustible gas and by a stream of pressurized oxidizing gas brought into its inlet region by separate supply lines, and to evacuate them in an appropriate manner through separate orifices. arranged in its outlet region, according to the invention, without having been previously mixed.
- the burner has two separate inlet channels 1, 2, respectively for the fuel and for the oxidant, opening into one of the burner faces (inlet face), to which are connected two respective chambers 3, 4 for balancing the pressures also separate, or two separate groups of balancing chambers.
- the inlet channels In the region where the inlet channels open into their respective balancing chambers, they have a narrowed section in order to determine an abutment shoulder for the end of their supply line.
- Two separate outlet channels 5, 6 respectively for the fuel and for the oxidant are connected the first to the chamber 3 for the fuel and the second for the chamber 4 for the oxidant.
- These channels open out of the burner, in the outlet region thereof, through two orifices in the form of two adjacent slots 7, 8 formed in the face of the burner opposite and parallel to the inlet face (outlet face) .
- the burner is preferably made up of several assembled parts and then comprises two half-burners arranged one for the passage of fuel and the other for the passage of oxidant.
- an intermediate piece 9 is inserted between the two half-burners to serve as a partition between them, which makes it possible to produce at least the outlet channels 5, 6 in the form of recesses in the facing faces of the two burners, and as in the figures, also compartments 3A, 3B, 4A, 4B of the pressure balancing chambers 3, 4.
- the two half-burners being placed opposite with their corresponding recesses opposite, the outlet channels 5, 6 and possibly the compartments of the chambers 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 outlet face, in the outlet region of the burner.
- the balancing chambers 3, 4 comprise several compartments, here two compartments 3A, 3B, 4A, 4B, succeeding each other from upstream to downstream of the housing and connected by conduits 3C, 3D.
- the walls of the partition 9 are approximately flat and parallel, and the same is true of the wall of each chamber 3, 4 and of each outlet channel 5, 6 which is opposite the partition .
- this facing wall can be inclined, and in particular that of the outlet channel can converge in the partition 9 in the direction of the outlet face; under 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 of a millimeter to a few millimeters and generally in the range of 0.2 to 5.0 mm; it is preferably in the range of 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 an oxidizer consisting of l 'oxygen.
- the slots extend over a few centimeters, and generally over the greater part of the length of the outlet face, for example 160 mm for a face 170 mm long.
- the height of the slots is chosen according to:
- Obtaining a suitable flame is also linked to the ratio between the length of each outlet channel and the height of the corresponding slot.
- a "channel length / slit height" ratio of approximately at least 20 seems to be necessary to correctly evacuate each of the two gas streams in the flame.
- the compartments 3A, 3B, 4A, 4B of the two chambers of each half-burner are here of generally parallelepipedal shape and of approximately equal dimensions, namely fifteen millimeters upstream downstream and ten millimeters high; the compartments extend approximately the same distance as the outlet channels 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
- conduits 3C, 4C 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 a particular application example and can be modified so that the pressure balancing chambers 3, 4 fulfill their role consisting in avoiding the preferential passage of the fluids below the inlet, and to make it possible to obtain a homogeneous "knife" flame with a straight profile.
- the conduits 3C, 4C are distant from the corresponding outlet channel 5, 6, and in particular from the partition 9; preferably, they extend in a region between two compartments so as to communicate these near their wall belonging to the half-burner; advantageously, they are constituted by cylindrical drillings 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 with respect 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 formed in a wall of the enclosure or in an attached fitting housed in the enclosure, itself having inclined internal faces 11 which converge in the direction of 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 of the workpiece, at least one channel and preferably two respective channels 12 through which one introduces by induction one or two streams of outside air towards the inside of the enclosure. If the dimensions and angles are suitably chosen, the air flow induced by the Venturi effect between the burner bevel and the housing, by the two streams of pressurized gas projected out of the burner allows significant cooling of the latter in its outlet region.
- the angle ⁇ 'between each bevel 10 of the external surface of the burner and the internal face 11 of the housing opposite is about ten degrees, and the exit face of the burner is set back at l interior of the housing, from a distance of approximately in the range of 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 part serving as a workpiece; this second solution makes it possible to control 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 makes it possible to obtain that this flame is soft and asymmetrical.
- the process implemented using this structure is as follows: separate streams of pressurized combustible gas and pressurized oxidizing gas are introduced into the burner inlet region, and these two streams are transmitted separately to the burner gas to separate chambers 3, 4 by means of which the respective pressures of the two gas streams are balanced; then the gases from the balancing chambers are discharged to a burner outlet region in two separate streams, and the two streams of pressurized gas are projected out of the burner by two respective separate and adjacent outlet slots 7, 8 provided in the exit region, in the form of two adjacent laminar streams, in the flame; thus, the two gases are only partially mixed in the flame, and the latter has a profile having a region where the oxidant is in excess and which in turn determines an oxidizing region in the enclosure, and a region where the oxid
- the flame 14 follows the interior circular shape of the enclosure in defining therein on one side an oxidizing zone 15 and on the other a reducing zone 16.
- the oxidizer is introduced on the side of the center of the enclosure 13, and the fuel on the side of the wall, there is obtained in the enclosure a central oxidizing region making it possible to treat the glass or glass articles under optimal conditions. crystal.
- the fuel is trapped between the oxygen slide and the wall, which allows its complete combustion. This reduces carbon monoxide emissions to the room where the enclosure is located.
- the asymmetry of the flame ensures a reduction in the production of nitrogen oxides.
- the externally symmetrical structure of the burner makes it possible to turn the latter face to face in its housing therefore to reverse the oxidizing region and the reducing region in the enclosure, which offers great flexibility of use since it allows create at will over the glass a reducing or oxidizing atmosphere.
- the invention is not limited to the forms and to the embodiments described above and represented, and other forms and other modes can be provided for without departing from its scope, in particular to adapt it to specific applications.
Landscapes
- 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)
Abstract
Description
Claims
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 true EP1055084A1 (fr) | 2000-11-29 |
EP1055084B1 EP1055084B1 (fr) | 2001-12-12 |
Family
ID=9522797
Family Applications (1)
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 (fr) |
CN (1) | CN1290333A (fr) |
BR (1) | BR9907802A (fr) |
CZ (1) | CZ297869B6 (fr) |
DE (1) | DE69900591T2 (fr) |
ES (1) | ES2169941T3 (fr) |
FR (1) | FR2774745B1 (fr) |
PT (1) | PT1055084E (fr) |
WO (1) | WO1999041548A1 (fr) |
Families Citing this family (3)
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 (fr) * | 2019-03-26 | 2020-09-30 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Brûleur à rideau de flamme compact, procédé de fonctionnement du brûleur et utilisation du procédé |
Family Cites Families (5)
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 |
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 |
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 |
-
1998
- 1998-02-10 FR FR9801556A patent/FR2774745B1/fr not_active Expired - Fee Related
-
1999
- 1999-01-19 ES ES99900951T patent/ES2169941T3/es not_active Expired - Lifetime
- 1999-01-19 WO PCT/FR1999/000092 patent/WO1999041548A1/fr active IP Right Grant
- 1999-01-19 PT PT99900951T patent/PT1055084E/pt unknown
- 1999-01-19 CZ CZ20002795A patent/CZ297869B6/cs not_active IP Right Cessation
- 1999-01-19 CN CN 99802789 patent/CN1290333A/zh active Pending
- 1999-01-19 BR BR9907802-3A patent/BR9907802A/pt not_active Application Discontinuation
- 1999-01-19 DE DE69900591T patent/DE69900591T2/de not_active Expired - Fee Related
- 1999-01-19 EP EP99900951A patent/EP1055084B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9941548A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE69900591D1 (de) | 2002-01-24 |
PT1055084E (pt) | 2002-05-31 |
FR2774745A1 (fr) | 1999-08-13 |
ES2169941T3 (es) | 2002-07-16 |
BR9907802A (pt) | 2000-10-17 |
CZ20002795A3 (cs) | 2001-08-15 |
CN1290333A (zh) | 2001-04-04 |
DE69900591T2 (de) | 2002-07-18 |
WO1999041548A1 (fr) | 1999-08-19 |
EP1055084B1 (fr) | 2001-12-12 |
CZ297869B6 (cs) | 2007-04-18 |
FR2774745B1 (fr) | 2000-03-17 |
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