EP0919769B1 - Dispositif de protection de l'extrémité d'injection d'un brûleur et dispositif de chauffe le comportant - Google Patents
Dispositif de protection de l'extrémité d'injection d'un brûleur et dispositif de chauffe le comportant Download PDFInfo
- Publication number
- EP0919769B1 EP0919769B1 EP98402658A EP98402658A EP0919769B1 EP 0919769 B1 EP0919769 B1 EP 0919769B1 EP 98402658 A EP98402658 A EP 98402658A EP 98402658 A EP98402658 A EP 98402658A EP 0919769 B1 EP0919769 B1 EP 0919769B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- heat shield
- jacket
- sio
- burner according
- 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
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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
- F23C5/02—Structural details of mounting
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/76—Protecting flame and burner parts
Definitions
- the present invention relates to an output protection device ejection of a burner mounted through a wall of an oven, of the type comprising a peripheral heat shield and mounting means said heat shield around the burner ejection outlet.
- the invention also relates to a heating device comprising a burner and a protection device of the aforementioned type.
- the invention relates more particularly to a burner according to the preamble of claim 1.
- the burners used are subject to strong attacks due on the one hand to thermal radiation and on the other hand to attacks chemicals caused by bodies resulting from the melting of cast iron.
- these cooling means include a tubular protective member through which circulates cooling water. This tubular member is mounted axially at the end from the burner and protrudes inside the oven.
- EP-A-582 521 discloses a burner provided with a thermal screen made of refractory material.
- the object of the invention is to propose a burner comprising a device for protecting the burner ejection outlet and a heating device comprising such a burner, do not not having the disadvantages mentioned above, and which allows get rid of the existence of a bulky water circuit and source of malfunctions.
- the invention relates to a burner according to the preamble of claim 1 , characterized in that the screen thermal includes a consumable structure of refractory material having the shape of a sleeve whose position can be adjusted and which always exceeds the ejection end of the burner by a same distance.
- the invention further relates to a heating device comprising a burner associated with a protection device as defined above.
- FIG. 1 a rotary furnace 10 for melting cast iron provided with a burner according to the invention.
- the oven has an enclosure 12 with axis of horizontal revolution, noted X-X.
- the enclosure 12 is delimited in its part running through a cylindrical wall 14 comprising, at each end 16, frustoconical obturation walls.
- the oven has axially means 20 for introducing the metals to be melted. It comprises, at its other end, an outlet 22 for molten iron.
- a burner 24 adapted to produce a flame 26 along the axis of the oven.
- the burner 24 is carried by a shutter door 28 of the oven articulated around a vertical Y-Y axis.
- the oven is supported in its running part by two crowns of rollers 30. It further comprises rotational drive means not shown.
- the interior wall of the furnace is lined with a siliceous refractory lining 32 comprising approximately 95% by weight of SiO 2 and 4% by weight of Al 2 O 3 , the remainder consisting of impurities.
- the door-mounted burner is shown on a larger scale in Figures 2 and 3.
- the door has an outer metal wall 34 lined internally of a refractory material 36 similar to the coating 32 used for the interior wall of the oven.
- the burner comprises, in a conventional manner, an envelope or body 38, generally of revolution.
- This envelope is separated by a wall transverse 40 delimiting therein a fuel gas inlet chamber 42 arranged behind and an oxidizing gas inlet chamber 44.
- the latter leads to the front end of the body, directly inside of the oven through an opening 46.
- Each chamber 42, 44 is connected to a corresponding gas supply source, by a side connection, noted 42A and 44A respectively.
- the fuel gas inlet chamber 42 communicates with three fuel injection rods 48. These rods pass through the wall 40 and are carried by it. They extend into the following envelope 38 the axis of the burner and protrude beyond the opening 46.
- the burner casing 38 is fixedly connected to the plate 34 of the door by a support frame 50 shown schematically in the figures.
- the burner is associated with a device 52 for protection of the burner injection outlet.
- This device 52 essentially comprises a heat shield 54 carried by mounting means 56 of it on the cylindrical running part denoted 38A of the envelope.
- the heat shield 54 is formed of a tubular member or sleeve. Thus, it has an external cylindrical surface denoted 54A and a passage internal cylindrical 54B. The diameter of the latter is constant and is very slightly greater than the external diameter of the current portion 38A of the burner body.
- the sleeve passes through the lining 36 of the door through an opening cylindrical 36A.
- a skirt 57 for protecting the heat shield formed of a tubular wall, extends the cylindrical opening 36A and projects outside the oven.
- the skirt 57 is integral with the wall 34.
- Sleeve 54 projects inside the oven at one front end at a distance of 7 cm. Its rear end projects outside the oven beyond plate 34 of the door. This rear end is integral mounting means 56.
- the sleeve 54 is formed by an adobe having undergone, before assembly with the mounting means 56, a cooking step prior to a temperature above 1000 ° C.
- the refractory material constituting the sleeve 54 is an aluminosilicate advantageously comprising by mass x% of SiO 2 and y% of Al 2 O 3 , the ratio x / y being between one third and two thirds and advantageously close to one half.
- the sum x + y of the mass percentages of SiO 2 and Al 2 O 3 is greater than 90%.
- the sleeve 54 In order to ensure good resistance of the sleeve 54 to the flame, as well good resistance to thermal shock, especially during phases shutdown and start-up of the oven, the sleeve is made in the manner next.
- the materials in the form of aggregates constituting the structure of the sleeve are arranged in a cylindrical mold defining the shape of the sleeve to make an adobe.
- tamping or clamping the adobe in the mold is made with care, in particular by adding successive layers 2 or 3 cm thick each packed with a pneumatic gland.
- the cooking of the rammed earth is then carried out according to a standard profile of temperature rise specific to adobe to a temperature of 1350 ° C.
- the rammed earth After cooking and demoulding, the rammed earth has the following characteristics: Basic constituent fireclay Average expansion between 0 and 1000 ° C 3.10 6 Physical characteristics Density after heating to 1000 ° C 2.3 T / m 3 Conductivity coefficient in Kcal m 2 h ° C to 600 ° C 0.7 800 ° C 0.7 1200 ° C 1 Resistance to cold compression after heating to 1100 ° C 350 Kg / cm 2 Pyroscopic cone 36 Temperature limit for use 1500 ° C Slump under load of 2 bars 0.5% at 1200 ° C and 5% at 1340 ° C.
- the mounting means 56 are adapted to ensure movement of the heat shield 54 relative to the wall of the oven enters at least two positions spaced along the axis of the burner. They include for this purpose a guide tube 58 with an inside diameter slightly greater than the diameter external of the current part 38A of the envelope.
- the tube 58 comprises, at its front end, a transverse annular plate 60 provided with holes fixing the screen 54.
- the latter comprises inking 62 the threaded ends of which are received through bores and held in place by nuts 64.
- the tube 58 has an annular flange 66 drilled with a set of tapped holes. Against this flange is applied an additional flange 68 retained on the first flange 66 by screws 70 forming means for tightening the two flanges against each other according to the axis of the burner.
- the flange 68 has at its internal diameter, on its face in contact with the first flange 66, a countersink 72 in which is received a clamping O-ring 74 whose diameter corresponds substantially to outside diameter of the current part 38A of the envelope. So the joint O-ring 74 is in contact with the lateral surface of the envelope.
- the clamping means 70 hold the flange 68 against the flange 66, the seal 74 is compressed and exerts a friction force on the main part 38A of the envelope, ensuring that the position of the heat shield 54.
- this length is of the order of 7 cm.
- the sleeve 54 When the sleeve 54 is new, as shown in FIG. 2, it has a great length, for example equal to 40 cm. So, the mounting means 56 are held behind and most of the length of the sleeve 54 extends behind the lining 36.
- the annular end face of the sleeve contained inside the oven gradually degrades, in particular under the chemical action of iron and manganese oxide molecules produced by the slag resulting from molten iron.
- the erosion of the end front of the sleeve is carried out along a plane extending perpendicularly to the axis of it. So in order to keep constant the length of the part of the sleeve projecting from the lining 36, the user of the oven periodically advances the sleeve to compensate for the amount of material eroded at its end.
- the low cost of the sleeve allows it to be replaced several times during the life of the oven without significantly increasing the cost operating it.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Cookers (AREA)
- Blast Furnaces (AREA)
- Gas Burners (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
- les moyens de montage sont disposés entre le brûleur et l'écran thermique, de sorte que l'écran thermique est porté par le brûleur ;
- le brûleur comporte une enveloppe renfermant des conduites d'acheminement du combustible et du comburant, laquelle enveloppe est tubulaire sur au moins une partie de sa longueur, et les moyens de déplacement comportent un organe de guidage emmanché sur la partie tubulaire de l'enveloppe, afin d'assurer le coulissement de l'écran thermique sur l'enveloppe ;
- l'organe de guidage est muni de deux brides accouplées, enserrant un joint torique de serrage appliqué contre la surface extérieure de la partie tubulaire de l'enveloppe, ainsi que de moyens de serrage des deux brides l'une sur l'autre, afin de comprimer le joint torique assurant ainsi un maintien en position de l'écran thermique par rapport à l'enveloppe du brûleur ;
- le matériau réfractaire constituant ladite structure est un aluminosilicate comportant en masse x % de SiO2 et y % de Al2O3 avec un rapport x/y compris entre un tiers et deux tiers et notamment voisin de un demi ;
- la somme x + y des pourcentages en masse de SiO2 et de Al2O3 est supérieure à 90 % ; et
- ladite structure est un pisé ayant subi, avant montage, une étape de cuisson à une température supérieure à 1000°C.
- la figure 1 est une vue schématique en coupe longitudinale d'un four rotatif de fusion de fonte muni d'un brûleur selon l'invention ;
- la figure 2 est une vue en coupe longitudinale d'un brûleur associé à un dispositif neuf de protection selon l'invention ; et
- la figure 3 est une vue en coupe longitudinale du brûleur de la figure 1 associé à un dispositif de protection selon l'invention ayant déjà subi une longue période de fonctionnement.
ELEMENT | RESULTATS EN % | ||
EXTRADOS | INTRADOS | CRASSE | |
SiO2 | 47.20 | 47.38 | 30.43 |
Al2O3 | 45.97 | 46.23 | 37.58 |
Fe2O3 total | 1.49 | 1.47 | 28.33 |
P2O5 | 2.50 | 2.18 | 1.19 |
TiO2 | 1.21 | 1.21 | 0.59 |
CaO | 0.29 | 0.26 | 0.25 |
MgO | 0.21 | 0.20 | 0.19 |
MnO | 0.01 | 0.01 | 0.13 |
K2O | 0.61 | 0.60 | 0.28 |
Na2O | 0.11 | 0.10 | 0.06 |
ZnO | --- | --- | 0.4 |
ZrO2 | --- | --- | 0.10 |
Perte au feu | 0.18 | 0.16 | 0.47 : gain au feu |
TOTAL | 99.78 | 99.80 | 99.53 |
PHASES MINERALOGIQUES | Sillimanite | Sillimanite | |
Al2O3,SiO2 | Al2O3,SiO2 | ||
Cristobalite SiO2 | Cristobalite SiO2 | ||
Andalousite | Andalousite | ||
Al2O3,SiO2 | Al2O3,SiO2 | ||
Quartz SiO2 (traces) | Quartz SiO2 (traces) |
Constituant de base | Chamotte |
Dilatation moyenne entre 0 et 1000°C | 3.106 |
Caractéristiques physiques | |
Densité après chauffage à 1000°C | 2.3 T/m3 |
Coefficient de conductibilité | |
en Kcal m2h°C à 600°C | 0.7 |
800°C | 0.7 |
1200°C | 1 |
Résistance à la compression à froid après chauffe à 1100°C | 350 Kg/cm2 |
Cône pyroscopique | 36 |
Température limite d'emploi | 1500°C |
Affaissement sous charge de 2 bars | 0.5 % à 1200°C et 5 % à 1340°C. |
Claims (9)
- Brûleur comportant une enveloppe (38) renfermant des conduites (38) d'acheminement du combustible et du comburant et munie à sa sortie d'éjection d'un dispositif de protection du type écran thermique, caractérisé en ce que l'écran thermique (54) comporte une structure consommable en matériau réfractaire, ayant la forme d'un manchon (54) dont la position peut être ajustée de manière à dépasser toujours l'extrémité d'éjection du brûleur d'une même distance.
- Brûleur selon la revendication 1, caractérisé en ce qu'il comporte des moyens de déplacement de l'écran thermique (54).
- Brûleur selon la revendication 1 ou 2, caractérisé en ce qu'il comporte des moyens de montage (56) disposés entre le corps du brûleur (24) et l'écran thermique (34), de sorte que l'écran thermique est porté par le brûleur (24).
- Brûleur selon l'une des revendications 2 ou 3, caractérisé en ce que l'enveloppe (38) est tubulaire sur au moins une partie de sa longueur, et en ce que les moyens de déplacement comportent un organe de guidage (58) emmanché sur la partie tubulaire (38A) de l'enveloppe, afin d'assurer le coulissement de l'écran thermique (54) sur l'enveloppe (38).
- Brûleur selon la revendication 4, caractérisé en ce que l'organe de guidage (58) est muni de deux brides (66, 68) accouplées, enserrant un joint torique (74) de serrage appliqué contre la surface extérieure de la partie tubulaire (38A) de l'enveloppe (38), ainsi que de moyens (70) de serrage des deux brides l'une sur l'autre, afin de comprimer le joint torique (74) assurant ainsi un maintien en position de l'écran thermique (54) par rapport à l'enveloppe (38) du brûleur.
- Brûleur selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau réfractaire constituant ladite structure est un alumino-silicate comportant en masse x % de SiO2 et y % de Al2O3 avec un rapport x/y compris entre un tiers et deux tiers et notamment voisin de un demi.
- Brûleur selon la revendication 6, caractérisé en ce que la somme x + y des pourcentages en masse de SiO2 et de Al2O3 est supérieure à 90 %.
- Brûleur selon la revendication 6 ou 7, caractérisé en ce que ladite structure est un pisé ayant subi, avant montage, une étape de cuisson à une température supérieure à 1000°C.
- Dispositif de chauffe comportant un brûleur (24) selon l'une des revendications précédentes, adapté pour être monté au travers de la paroi (28) d'un four.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9715089 | 1997-12-01 | ||
FR9715089A FR2771799B1 (fr) | 1997-12-01 | 1997-12-01 | Dispositif de protection de l'extremite d'injection d'un bruleur et dispositif de chauffe le comportant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0919769A1 EP0919769A1 (fr) | 1999-06-02 |
EP0919769B1 true EP0919769B1 (fr) | 2003-07-02 |
Family
ID=9514002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402658A Expired - Lifetime EP0919769B1 (fr) | 1997-12-01 | 1998-10-26 | Dispositif de protection de l'extrémité d'injection d'un brûleur et dispositif de chauffe le comportant |
Country Status (12)
Country | Link |
---|---|
US (1) | US6089858A (fr) |
EP (1) | EP0919769B1 (fr) |
JP (1) | JPH11229009A (fr) |
KR (1) | KR19990062680A (fr) |
AR (1) | AR017774A1 (fr) |
BR (1) | BR9805317A (fr) |
DE (1) | DE69816000T2 (fr) |
ES (1) | ES2203908T3 (fr) |
FR (1) | FR2771799B1 (fr) |
PL (1) | PL330003A1 (fr) |
PT (1) | PT919769E (fr) |
WO (1) | WO1999028676A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6688881B1 (en) * | 2002-08-09 | 2004-02-10 | Fitel Usa Corp. | Torch mount for high deposition glass torches |
US6884064B1 (en) | 2003-11-12 | 2005-04-26 | Khd Humboldt Wedag Ag | Burner mechanism for a rotary kiln |
CN104846162A (zh) * | 2015-05-11 | 2015-08-19 | 夏云美 | 一种淬火用火焰喷射管 |
CN109595547A (zh) * | 2017-09-30 | 2019-04-09 | 山东博研粉体技术装备有限公司 | 一种双膛窑喷枪 |
RU2755239C1 (ru) | 2021-03-02 | 2021-09-14 | Общество с ограниченной ответственностью "ЭР ЛИКИД" | Топливно-кислородная горелка для плавильной печи, система и способ управления розжигом и контролем пламени такой горелки |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1930812A (en) * | 1931-11-13 | 1933-10-17 | Gilbert & Barker Mfg Co | Oil burner |
US4726763A (en) * | 1982-09-24 | 1988-02-23 | Gte Products Corporation | Dual insulated ceramic burner |
US4952218A (en) * | 1988-08-26 | 1990-08-28 | The Dow Chemical Company | Two-fluid nozzle for atomizing a liquid solid slurry and protecting nozzle tip |
US4986748A (en) * | 1989-12-15 | 1991-01-22 | Corning Incorporated | Wide range oxy-fuel burner and furnace operation |
US5267850A (en) * | 1992-06-04 | 1993-12-07 | Praxair Technology, Inc. | Fuel jet burner |
FR2694623B1 (fr) * | 1992-08-06 | 1994-09-16 | Air Liquide | Brûleurs oxycombustibles. |
GB2280501B (en) * | 1993-07-30 | 1996-10-23 | Co Steel Sheerness Plc | Burner mounting device |
US5785721A (en) * | 1997-01-31 | 1998-07-28 | Texaco Inc. | Fuel injector nozzle with preheat sheath for reducing thermal shock damage |
-
1997
- 1997-12-01 FR FR9715089A patent/FR2771799B1/fr not_active Expired - Fee Related
-
1998
- 1998-10-26 PT PT98402658T patent/PT919769E/pt unknown
- 1998-10-26 ES ES98402658T patent/ES2203908T3/es not_active Expired - Lifetime
- 1998-10-26 EP EP98402658A patent/EP0919769B1/fr not_active Expired - Lifetime
- 1998-10-26 DE DE69816000T patent/DE69816000T2/de not_active Expired - Lifetime
- 1998-11-27 JP JP10337906A patent/JPH11229009A/ja active Pending
- 1998-11-30 AR ARP980106059A patent/AR017774A1/es unknown
- 1998-11-30 BR BR9805317-5A patent/BR9805317A/pt not_active Application Discontinuation
- 1998-12-01 KR KR1019980052161A patent/KR19990062680A/ko not_active Application Discontinuation
- 1998-12-01 PL PL98330003A patent/PL330003A1/xx unknown
- 1998-12-02 WO PCT/PT1998/000006 patent/WO1999028676A1/fr active Application Filing
- 1998-12-02 US US09/319,248 patent/US6089858A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69816000D1 (de) | 2003-08-07 |
PL330003A1 (en) | 1999-06-07 |
EP0919769A1 (fr) | 1999-06-02 |
KR19990062680A (ko) | 1999-07-26 |
FR2771799A1 (fr) | 1999-06-04 |
DE69816000T2 (de) | 2004-05-27 |
US6089858A (en) | 2000-07-18 |
WO1999028676A1 (fr) | 1999-06-10 |
JPH11229009A (ja) | 1999-08-24 |
PT919769E (pt) | 2003-11-28 |
FR2771799B1 (fr) | 1999-12-31 |
ES2203908T3 (es) | 2004-04-16 |
AR017774A1 (es) | 2001-10-24 |
BR9805317A (pt) | 1999-11-09 |
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