EP0533515A1 - Sealing means between the coke oven door and the door frame - Google Patents

Sealing means between the coke oven door and the door frame Download PDF

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Publication number
EP0533515A1
EP0533515A1 EP92402289A EP92402289A EP0533515A1 EP 0533515 A1 EP0533515 A1 EP 0533515A1 EP 92402289 A EP92402289 A EP 92402289A EP 92402289 A EP92402289 A EP 92402289A EP 0533515 A1 EP0533515 A1 EP 0533515A1
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EP
European Patent Office
Prior art keywords
door
sealing
oven
channel
sealing member
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
Application number
EP92402289A
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German (de)
French (fr)
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EP0533515B1 (en
Inventor
Lucien Mazzini
Jean-Marc Leroy
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Lorfonte
Sollac SA
Original Assignee
Lorfonte
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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Publication of EP0533515A1 publication Critical patent/EP0533515A1/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B25/00—Doors or closures for coke ovens
    • C10B25/02—Doors; Door frames
    • C10B25/16—Sealing; Means for sealing

Definitions

  • the present invention relates to a sealing device between a door of a coke oven and a door frame. More specifically, the device according to the invention makes it possible to maintain a good seal despite the deformations which the door undergoes due to temperature variations and despite the tar deposits resulting from the carbonization of the coal.
  • temperatures of the door and the door frame which can vary from 80 to 200 ° C. are noted.
  • sealing devices comprising a sealing member forming a blade, fixed to the door and having a junction edge with the door frame, and a sealing gasket at the end of this blade, sealing between the blade and the adjacent edges of the door frame.
  • the object of the present invention is to produce a sealing device for a coke oven door making it possible to maintain the seal despite the deformations of the door due to the temperature, without using elastic, spring or other means.
  • the subject of the invention is a sealing device between a door of a coke oven and a door frame, comprising a sealing member, fixed to the door, having a junction edge with the frame. , comprising a channel integral with the door, adjacent to the sealing member, supplied with a sealing gas having a pressure greater than that existing inside the oven, characterized in that the channel extends over all the periphery of the door and comprises several compartments respectively supplied with sealing gas by separate supply conduits, each supply duct comprising means for adjusting the flow rate of sealing gas.
  • the sealing member is delimited by blades, a first end edge of the member forming the junction edge with the door frame, the second end edge of the 'organ comprising cutouts.
  • the invention also relates to a coke oven comprising at least one door frame delimiting an opening and at least one door mounted movable relative to this frame in a direction substantially parallel to the axis of said opening, characterized in that the frame and the door comprise a sealing device as defined above.
  • FIG. 1 shows a coke oven 10 having an opening 12, of axis X-X, necessary to empty the oven at the end of the coking process.
  • a door 14 makes it possible to seal the opening 12 in a leaktight manner during the coking process.
  • the opening-closing movement of the door 14 takes place along the axis XX.
  • the door 14 is connected to an operating and guiding device, not shown in the figures, carried by a door frame 16.
  • This door frame fixed to an outside face of the coke oven 10, around the opening 12, has a wall 18, substantially parallel to the axis XX of the opening 12, and a wall 20, perpendicular to the wall 18, allowing the fixing of the frame 16 on the oven.
  • the door 14 is provided with a wall 22, substantially parallel to the axis X-X, projecting towards the outside of the oven, disposed at the periphery of the door and integrally formed therewith.
  • the opening 12 of the oven 10, the door 14 and the frame 16 are of generally rectangular shape, their width being small relative to their height.
  • door 14 has a width of 30 cm and a height of 15 m.
  • FIG. 1 Also seen in Figure 1 a sealing member 24, adjacent to the peripheral wall 22 of the door 14.
  • This sealing member 24 is shown in more detail in Figure 2.
  • the sealing member consists of a rectangular frame 24, delimited by four blades 24A, 24B, 24C, 24D fixed to the door by clamping members 26, only one of which is shown in FIG. 1.
  • a first end edge 28 of the sealing member 24 forms a junction edge with the wall 20 of the door frame 16, in the closed position of the door 14.
  • the second end edge 30 of the member d 'seal 24 comprises cutouts 32 formed on the walls 24A, 24B which extend along the height of the seal member 24. These cutouts 32 reduce the deformations of the seal member 24 due to temperature variations during operation of the oven. The cutouts 32 are distributed over the sealing member 24 at locations having significant expansion.
  • Each clamping member 26 comprises a body 34, passing through the peripheral wall 22 of the door, perpendicular to this wall.
  • a first end threaded body 34, on the right considering figure 1, comprises a tightening nut 36.
  • a second end of body 34, on the left considering figure 1, comprises a finger 38 extending roughly parallel to the peripheral wall 22 of the door 14.
  • the sealing member 24 is clamped between the peripheral wall 22 of the door 14 and a protuberance 40 of the free end of the finger 38 of the clamping member 26.
  • the sealing member 24 carries a channel 44 in U.
  • This channel is integral with the door 14 by being fixed, by known means not shown, on the sealing member 24.
  • the open side of the channel 44 is adjacent at the junction edge 28 of the sealing member and facing the wall 20 of the door frame 16, when the door 14 is in the closed position.
  • the bottom 46 of the channel 44 is connected to a supply duct 48 for a pressurized sealing gas.
  • the channel 44 as a whole is shown diagrammatically in FIG. 3. It extends around the periphery of the sealing member 24 and has a generally rectangular shape, similar to the shape of the sealing member 24. It can be seen in FIG. 3 that the channel 44 has eight compartments 44A-44H, supplied with sealing gas respectively by eight separate conduits 48A-48H.
  • the two parallel parts of the channel 44 which extend along the height of the oven door each have three compartments.
  • the two parallel parts of channel 44 which extend along the width of the oven door each have a single compartment.
  • Each conduit 48A-48H is connected to means for adjusting the gas flow rate comprising valves 50A-50H. These valves are connected to a general supply conduit 52. The direction of gas flow in the conduits shown in Figure 3 is indicated by the arrows f.
  • the gaseous medium contained in the oven 10 is at a pressure higher than atmospheric pressure existing outside the oven.
  • the pressurized sealing gas circulating in the compartments of the channel 44 is a neutral gas with respect to the gaseous medium contained in the furnace 10.
  • the sealing gas is nitrogen.
  • the pressure of nitrogen inside the compartments of channel 44 is higher than that of the gaseous medium of the oven, for example about 20 millibars (2000 Pa) above atmospheric pressure.
  • the channel 44 delimits a buffer zone in which the nitrogen circulates at a pressure higher than that of the gaseous medium contained in the furnace 10.
  • the buffer zone being adjacent to the junction edge of the sealing member 24 with the door frame 16, the coke oven gases do not leak to the outside of the oven despite the appearance of leaks when the seal member 24 is deformed under the effect of temperature variations.
  • the supply lines 48A-48H separate for each compartment 44A-44H and the control valves 50A-50H arranged on each of these conduits make it possible to adapt the pressure in each compartment of channel 44 according to the extent of the faults sealing.
  • the operator controls the tightness of the oven door over its entire height by adjusting different pressures in each compartment of channel 44, these pressures being greater than atmospheric pressure by approximately 15 to 30 millibars (1500 to 3000 Pa ).
  • the recesses 32 formed in the sealing member 24 make it possible to optimize the consumption of nitrogen by reducing the deformations of the sealing member 24 so as to minimize leaks between the door 14 and the door frame 16.
  • the invention makes it possible to avoid emissions into the atmosphere of fumes from the coke oven by using a sealing gas, circulating in a buffer zone, not causing the ignition of the exhaust gases from the oven, and consequently avoiding deterioration of the oven inlets which are in particular made of silica.
  • the channel in which the sealing gas flows can have various shapes. It can be constituted in particular by an angle iron, disposed at the periphery of the sealing member, so as to be delimited by the walls of this angle iron and the blades of the sealing member.
  • the invention makes it possible to avoid air inlets detrimental to the life of the oven openings.
  • the invention makes it possible to protect the metal structure composing the coke oven by preventing the ignition of the gases which it contains.
  • the invention also makes it possible to protect the environment by controlling the tightness of the coke oven doors and by avoiding polluting gas emissions.
  • the invention contributes to strengthening safety conditions in the workplace, by preventing the leakage of hot and harmful gases.
  • the invention also contributes to ensuring better cleanliness of these workplaces.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
  • Special Wing (AREA)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Sealing Devices (AREA)

Abstract

This device comprises a sealing member (24) attached to the door (14) of the coke oven (10), which has an edge for connection (28) with the frame (16) of this door, and a channel (44) arranged at the periphery of the sealing member (24), in which a sealing gas travels at a pressure which is higher in relation to the gaseous mixture inside the oven (10). The open side of the channel (44) faces the door frame (16) so as to form a buffer zone of sealing gas shutting off the leakages produced when the sealing member expands. The channel (44) also comprises a number of compartments provided with separate means for feeding sealing gas making it possible to adapt the pressure of the sealing gas as a function of the locations where the leakages are greatest. <IMAGE>

Description

La présente invention concerne un dispositif d'étanchéité entre une porte d'un four à coke et un cadre de porte. Plus précisément, le dispositif selon l'invention permet de conserver une bonne étanchéité malgré les déformations que subit la porte du fait des variations de température et malgré les dépôts de goudron issus de la carbonisation du charbon.The present invention relates to a sealing device between a door of a coke oven and a door frame. More specifically, the device according to the invention makes it possible to maintain a good seal despite the deformations which the door undergoes due to temperature variations and despite the tar deposits resulting from the carbonization of the coal.

Le problème que l'on rencontre au niveau des portes de four à coke est celui de l'étanchéité aux poussières du four et aux gaz entre les portes du four et les parois latérales du four ou le cadre de porte fixé aux parois du four.The problem encountered with coke oven doors is that of the oven dust and gas tightness between the oven doors and the side walls of the oven or the door frame attached to the walls of the oven.

Il est très important, pour assurer une bonne cokéfaction et éviter des émissions à l'atmosphère, de réaliser une parfaite étanchéité entre les portes du four et ses parois latérales ou les parois du cadre du four.It is very important, to ensure good coking and avoid emissions to the atmosphere, to achieve a perfect seal between the oven doors and its side walls or the walls of the oven frame.

En effet, en cas d'obturation non étanche du four, durant le processus de cokéfaction, des gaz bruts chargés de goudron s'échappent, entraînant avec eux une certaine quantité de goudron. Une fois à l'extérieur du four, ces gaz en se refroidissant se condensent et le goudron se dépose à l'extérieur des portes, ce qui provoque des salissures.In fact, if the oven is not sealed off tightly, during the coking process, raw gases charged with tar escape, carrying with them a certain amount of tar. Once outside the oven, these gases on cooling condense and the tar is deposited outside the doors, which causes soiling.

Lorsque la fuite est plus importante et que le débit de gaz qui s'échappe devient conséquent, ce gaz qui s'échappe risque de s'auto-enflammer créant ainsi, du fait de la pression, un véritable chalumeau au niveau de la fuite, entraînant un chauffage intense du cadre de porte et des organes de manoeuvre de ladite porte et une déformation de ceux-ci voire même leur détérioration.When the leak is greater and the flow of escaping gas becomes consequent, this escaping gas risks self-igniting thus creating, due to the pressure, a real torch at the level of the leak, resulting in intense heating of the door frame and the operating members of said door and deformation thereof or even their deterioration.

Compte tenu de la température pouvant régner dans un four à coke, on relève au cours du processus de cokéfaction des températures de la porte et du cadre de porte pouvant varier de 80 à 200°C.Taking into account the temperature which can prevail in a coke oven, during the coking process, temperatures of the door and the door frame which can vary from 80 to 200 ° C. are noted.

Cette variation de température entraîne une dilatation importante de la porte et du cadre de porte, les déformations relevées pouvant aller jusqu'à 50 mm.This variation in temperature results in significant expansion of the door and the door frame, the deformations noted being able to go up to 50 mm.

Il est connu d'utiliser des dispositifs d'étanchéité comprenant un organe d'étanchéité formant lame, fixé sur la porte et présentant un bord de jonction avec le cadre de porte, et une garniture d'étanchéité à l'extrémité de cette lame, assurant l'étanchéité entre la lame et les bords adjacents du cadre de porte.It is known to use sealing devices comprising a sealing member forming a blade, fixed to the door and having a junction edge with the door frame, and a sealing gasket at the end of this blade, sealing between the blade and the adjacent edges of the door frame.

Compte tenu des déformations importantes que subissent la lame et le cadre de porte durant le processus de cokéfaction, il est connu de monter la garniture d'étanchéité sur un dispositif à ressort permettant ainsi de la conserver appliquée contre la paroi du cadre de porte même lorsque le couteau de la porte n'est plus en contact avec ladite paroi. Un tel dispositif, décrit dans le brevet français n° 2 362 911, nécessite des moyens élastiques compliqués, coûteux et peu propices à l'environnement des portes de four à coke.Given the significant deformations that the blade and the door frame undergo during the coking process, it is known to mount the seal on a spring device, thus making it possible to keep it applied against the wall of the door frame even when the door knife is no longer in contact with said wall. Such a device, described in French Patent No. 2,362,911, requires complicated elastic means, costly and not very conducive to the environment of coke oven doors.

La présente invention a pour but de réaliser un dispositif d'étanchéité de porte de four à coke permettant de conserver l'étanchéité malgré les déformations de la porte dues à la température, sans utiliser de moyens élastiques, à ressort ou autre.The object of the present invention is to produce a sealing device for a coke oven door making it possible to maintain the seal despite the deformations of the door due to the temperature, without using elastic, spring or other means.

A cet effet, l'invention a pour objet un dispositif d'étanchéité entre une porte d'un four à coke et un cadre de porte, comportant un organe d'étanchéité, fixé sur la porte, présentant un bord de jonction avec le cadre, comportant un canal solidaire de la porte, adjacent à l'organe d'étanchéité, alimenté par un gaz d'étanchéité ayant une pression supérieure à celle existant à l'intérieur du four, caractérisé en ce que le canal s'étend sur toute la périphérie de la porte et comprend plusieurs compartiments respectivement alimentés en gaz d'étanchéité par des conduits d'alimentation distincts, chaque conduit d'alimentation comportant des moyens de réglage du débit de gaz d'étanchéité.To this end, the subject of the invention is a sealing device between a door of a coke oven and a door frame, comprising a sealing member, fixed to the door, having a junction edge with the frame. , comprising a channel integral with the door, adjacent to the sealing member, supplied with a sealing gas having a pressure greater than that existing inside the oven, characterized in that the channel extends over all the periphery of the door and comprises several compartments respectively supplied with sealing gas by separate supply conduits, each supply duct comprising means for adjusting the flow rate of sealing gas.

Suivant une autre caractéristique de l'invention, l'organe d'étanchéité est délimité par des lames, un premier bord d'extrémité de l'organe formant le bord de jonction avec le cadre de porte, le second bord d'extrémité de l'organe comportant des découpes.According to another characteristic of the invention, the sealing member is delimited by blades, a first end edge of the member forming the junction edge with the door frame, the second end edge of the 'organ comprising cutouts.

L'invention a également pour objet un four à coke comprenant au moins un cadre de porte délimitant une ouverture et au moins une porte montée mobile par rapport à ce cadre suivant une direction sensiblement parallèle à l'axe de ladite ouverture, caractérisé en ce que le cadre et la porte comportent un dispositif d'étanchéité tel que défini ci-dessus.The invention also relates to a coke oven comprising at least one door frame delimiting an opening and at least one door mounted movable relative to this frame in a direction substantially parallel to the axis of said opening, characterized in that the frame and the door comprise a sealing device as defined above.

Un exemple de réalisation de l'invention va être décrit ci-dessous en faisant référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue partielle en coupe d'une porte d'un four à coke, en position fermée, munie d'un dispositif d'étanchéité selon l'invention ;
  • la figure 2 est une vue en perspective de l'organe d'étanchéité ;
  • la figure 3 est une vue schématique en élévation du canal, dans lequel circule le gaz d'étanchéité, entourant l'organe d'étanchéité.
An exemplary embodiment of the invention will be described below with reference to the accompanying drawings in which:
  • Figure 1 is a partial sectional view of a door of a coke oven, in the closed position, provided with a sealing device according to the invention;
  • Figure 2 is a perspective view of the sealing member;
  • Figure 3 is a schematic elevational view of the channel, in which the sealing gas flows, surrounding the sealing member.

On voit à la figure 1 un four à coke 10 présentant une ouverture 12, d'axe X-X, nécessaire pour vider le four à la fin du processus de cokéfaction.FIG. 1 shows a coke oven 10 having an opening 12, of axis X-X, necessary to empty the oven at the end of the coking process.

Une porte 14 permet d'obturer de manière étanche l'ouverture 12 pendant le processus de cokéfaction. Le mouvement d'ouverture-fermeture de la porte 14 s'effectue suivant l'axe X-X. La porte 14 est reliée à un dispositif de manoeuvre et de guidage, non représenté sur les figures, porté par un cadre de porte 16. Ce cadre de porte, fixé sur une face extérieure du four à coke 10, autour de l'ouverture 12, comporte une paroi 18, sensiblement parallèle à l'axe X-X de l'ouverture 12, et une paroi 20, perpendiculaire à la paroi 18, permettant la fixation du cadre 16 sur le four.A door 14 makes it possible to seal the opening 12 in a leaktight manner during the coking process. The opening-closing movement of the door 14 takes place along the axis XX. The door 14 is connected to an operating and guiding device, not shown in the figures, carried by a door frame 16. This door frame, fixed to an outside face of the coke oven 10, around the opening 12, has a wall 18, substantially parallel to the axis XX of the opening 12, and a wall 20, perpendicular to the wall 18, allowing the fixing of the frame 16 on the oven.

La porte 14 est munie d'une paroi 22, sensiblement parallèle à l'axe X-X, faisant saillie vers l'extérieur du four, disposée à la périphérie de la porte et venue de matière avec celle-ci.The door 14 is provided with a wall 22, substantially parallel to the axis X-X, projecting towards the outside of the oven, disposed at the periphery of the door and integrally formed therewith.

L'ouverture 12 du four 10, la porte 14 et le cadre 16 sont de forme générale rectangulaire, leur largeur étant faible par rapport à leur hauteur. Par exemple, la porte 14 a une largeur de 30 cm et une hauteur de 15 m.The opening 12 of the oven 10, the door 14 and the frame 16 are of generally rectangular shape, their width being small relative to their height. For example, door 14 has a width of 30 cm and a height of 15 m.

On voit également sur la figure 1 un organe d'étanchéité 24, adjacent à la paroi périphérique 22 de la porte 14. Cet organe d'étanchéité 24 est montré plus en détail à la figure 2. L'organe d'étanchéité est constitué d'un cadre 24 rectangulaire, délimité par quatre lames 24A,24B,24C,24D fixées sur la porte par des organes de serrage 26, dont un seul est représenté à la figure 1.Also seen in Figure 1 a sealing member 24, adjacent to the peripheral wall 22 of the door 14. This sealing member 24 is shown in more detail in Figure 2. The sealing member consists of a rectangular frame 24, delimited by four blades 24A, 24B, 24C, 24D fixed to the door by clamping members 26, only one of which is shown in FIG. 1.

Un premier bord d'extrémité 28 de l'organe d'étanchéité 24 forme un bord de jonction avec la paroi 20 du cadre de porte 16, en position fermée de la porte 14. Le second bord d'extrémité 30 de l'organe d'étanchéité 24 comporte des découpes 32 ménagées sur les parois 24A,24B qui s'étendent suivant la hauteur de l'organe d'étanchéité 24. Ces découpes 32 réduisent les déformations de l'organe d'étanchéité 24 dues aux variations de température lors du fonctionnement du four. Les découpes 32 sont réparties sur l'organe d'étanchéité 24 en des emplacements présentant une dilatation importante.A first end edge 28 of the sealing member 24 forms a junction edge with the wall 20 of the door frame 16, in the closed position of the door 14. The second end edge 30 of the member d 'seal 24 comprises cutouts 32 formed on the walls 24A, 24B which extend along the height of the seal member 24. These cutouts 32 reduce the deformations of the seal member 24 due to temperature variations during operation of the oven. The cutouts 32 are distributed over the sealing member 24 at locations having significant expansion.

Chaque organe de serrage 26 comprend un corps 34, traversant la paroi périphérique 22 de la porte, perpendiculairement à cette paroi. Une première extrémité filetée du corps 34, à droite en considérant la figure 1, comporte un écrou de serrage 36. Une seconde extrémité du corps 34, à gauche en considérant la figure 1, comporte un doigt 38 s'étendant à peu près parallèlement à la paroi périphérique 22 de la porte 14. L'organe d'étanchéité 24 est serré entre la paroi périphérique 22 de la porte 14 et une protubérance 40 de l'extrémité libre du doigt 38 de l'organe de serrage 26.Each clamping member 26 comprises a body 34, passing through the peripheral wall 22 of the door, perpendicular to this wall. A first end threaded body 34, on the right considering figure 1, comprises a tightening nut 36. A second end of body 34, on the left considering figure 1, comprises a finger 38 extending roughly parallel to the peripheral wall 22 of the door 14. The sealing member 24 is clamped between the peripheral wall 22 of the door 14 and a protuberance 40 of the free end of the finger 38 of the clamping member 26.

L'organe d'étanchéité 24 porte un canal 44 en U. Ce canal est solidaire de la porte 14 en étant fixé, par des moyens connus non représentés, sur l'organe d'étanchéité 24. Le côté ouvert du canal 44 est adjacent au bord de jonction 28 de l'organe d'étanchéité et en regard de la paroi 20 du cadre de porte 16, lorsque la porte 14 est en position fermée. Le fond 46 du canal 44 est raccordé à un conduit d'alimentation 48 d'un gaz d'étanchéité sous pression.The sealing member 24 carries a channel 44 in U. This channel is integral with the door 14 by being fixed, by known means not shown, on the sealing member 24. The open side of the channel 44 is adjacent at the junction edge 28 of the sealing member and facing the wall 20 of the door frame 16, when the door 14 is in the closed position. The bottom 46 of the channel 44 is connected to a supply duct 48 for a pressurized sealing gas.

On a représenté schématiquement à la figure 3 le canal 44 dans son ensemble. Celui-ci s'étend à la périphérie de l'organe d'étanchéité 24 et a une forme générale rectangulaire, similaire à la forme de l'organe d'étanchéité 24. On voit sur la figure 3 que le canal 44 comporte huit compartiments 44A-44H, alimentés en gaz d'étanchéité respectivement par huit conduits distincts 48A-48H.The channel 44 as a whole is shown diagrammatically in FIG. 3. It extends around the periphery of the sealing member 24 and has a generally rectangular shape, similar to the shape of the sealing member 24. It can be seen in FIG. 3 that the channel 44 has eight compartments 44A-44H, supplied with sealing gas respectively by eight separate conduits 48A-48H.

Les deux parties parallèles du canal 44 qui s'étendent suivant la hauteur de la porte du four comportent chacune trois compartiments. Les deux parties parallèles du canal 44 qui s'étendent suivant la largeur de la porte du four comportent chacune un seul compartiment.The two parallel parts of the channel 44 which extend along the height of the oven door each have three compartments. The two parallel parts of channel 44 which extend along the width of the oven door each have a single compartment.

Chaque conduit 48A-48H est raccordé à des moyens de réglage du débit du gaz comportant des vannes 50A-50H. Ces vannes sont raccordées à un conduit général d'alimentation 52. Le sens de circulation du gaz dans les conduits représentés à la figure 3 est indiqué par les flèches f.Each conduit 48A-48H is connected to means for adjusting the gas flow rate comprising valves 50A-50H. These valves are connected to a general supply conduit 52. The direction of gas flow in the conduits shown in Figure 3 is indicated by the arrows f.

Le milieu gazeux contenu dans le four 10 est à une pression supérieure à la pression atmosphérique existant à l'extérieur du four. Au cours de la cokéfaction, notamment quelques minutes après l'enfournement du coke, l'écart de pression entre le milieu gazeux contenu dans le four et l'atmosphère peut atteindre, voire dépasser, 16 millibars (1600 Pa). Le gaz d'étanchéité sous pression circulant dans les compartiments du canal 44 est un gaz neutre à l'égard du milieu gazeux contenu dans le four 10. Dans l'exemple décrit, le gaz d'étanchéité est de l'azote. Au cours de la cokéfaction, la pression de l'azote à l'intérieur des compartiments du canal 44 est supérieure à celle du milieu gazeux du four, par exemple d'environ 20 millibars (2000 Pa) au-dessus de la pression atmosphérique.The gaseous medium contained in the oven 10 is at a pressure higher than atmospheric pressure existing outside the oven. During coking, especially a few minutes after the coke has been placed in the oven, the pressure difference between the gaseous medium contained in the oven and the atmosphere can reach, or even exceed, 16 millibars (1600 Pa). The pressurized sealing gas circulating in the compartments of the channel 44 is a neutral gas with respect to the gaseous medium contained in the furnace 10. In the example described, the sealing gas is nitrogen. During coking, the pressure of nitrogen inside the compartments of channel 44 is higher than that of the gaseous medium of the oven, for example about 20 millibars (2000 Pa) above atmospheric pressure.

De cette façon, le canal 44 délimite une zone tampon dans laquelle circule l'azote à une pression supérieure à celle du milieu gazeux contenu dans le four 10. La zone tampon étant adjacente au bord de jonction de l'organe d'étanchéité 24 avec le cadre de porte 16, les gaz du four à coke ne fuient pas vers l'extérieur du four malgré l'apparition de défauts d'étanchéité lorsque l'organe d'étanchéité 24 se déforme sous l'effet des variations de température.In this way, the channel 44 delimits a buffer zone in which the nitrogen circulates at a pressure higher than that of the gaseous medium contained in the furnace 10. The buffer zone being adjacent to the junction edge of the sealing member 24 with the door frame 16, the coke oven gases do not leak to the outside of the oven despite the appearance of leaks when the seal member 24 is deformed under the effect of temperature variations.

Les défauts d'étanchéité entre la porte 14 et le cadre de porte 16 étant plus importants dans le haut et dans le bas de la porte, il est possible d'adapter la pression de l'azote dans les compartiments correspondant du canal 44. Les conduits d'alimentation 48A-48H distincts pour chaque compartiments 44A-44H et les vannes de réglage 50A-50H disposées sur chacun de ces conduits permettent d'adapter la pression dans chaque compartiment du canal 44 en fonction de l'importance des défauts d'étanchéité. Ainsi, l'opérateur maîtrise l'étanchéité de la porte de four sur toute sa hauteur en réglant des pressions différentes dans chaque compartiment du canal 44, ces pressions étant supérieures à la pression atmosphérique d'environ 15 à 30 millibars (1500 à 3000 Pa).As the leaks between the door 14 and the door frame 16 are greater at the top and at the bottom of the door, it is possible to adapt the nitrogen pressure in the corresponding compartments of channel 44. The supply lines 48A-48H separate for each compartment 44A-44H and the control valves 50A-50H arranged on each of these conduits make it possible to adapt the pressure in each compartment of channel 44 according to the extent of the faults sealing. Thus, the operator controls the tightness of the oven door over its entire height by adjusting different pressures in each compartment of channel 44, these pressures being greater than atmospheric pressure by approximately 15 to 30 millibars (1500 to 3000 Pa ).

Les évidements 32 ménagés dans l'organe d'étanchéité 24 permettent d'optimiser la consommation d'azote en réduisant les déformations de l'organe d'étanchéité 24 de façon à minimiser les fuites entre la porte 14 et le cadre de porte 16.The recesses 32 formed in the sealing member 24 make it possible to optimize the consumption of nitrogen by reducing the deformations of the sealing member 24 so as to minimize leaks between the door 14 and the door frame 16.

L'invention permet d'éviter les émissions dans l'atmosphère de fumées provenant du four à coke en utilisant un gaz d'étanchéité, circulant dans une zone tampon, ne provoquant pas l'inflammation des gaz de fuite du four, et par conséquent en évitant la détérioration des entrées du four qui sont notamment en silice.The invention makes it possible to avoid emissions into the atmosphere of fumes from the coke oven by using a sealing gas, circulating in a buffer zone, not causing the ignition of the exhaust gases from the oven, and consequently avoiding deterioration of the oven inlets which are in particular made of silica.

Le canal dans lequel circule le gaz d'étanchéité peut avoir des formes diverses. Il peut être constitué notamment par une cornière, disposée à la périphérie de l'organe d'étanchéité, de manière à être délimité par les parois de cette cornière et les lames de l'organe d'étanchéité.The channel in which the sealing gas flows can have various shapes. It can be constituted in particular by an angle iron, disposed at the periphery of the sealing member, so as to be delimited by the walls of this angle iron and the blades of the sealing member.

Par ailleurs, l'invention permet d'éviter les entrées d'air préjudiciables à la durée de vie des ouvertures du four. L'invention permet de protéger la structure métallique composant le four à coke en évitant l'inflammation des gaz qu'il contient.Furthermore, the invention makes it possible to avoid air inlets detrimental to the life of the oven openings. The invention makes it possible to protect the metal structure composing the coke oven by preventing the ignition of the gases which it contains.

L'invention permet également de protéger l'environnement en maîtrisant l'étanchéité des portes de four à coke et en évitant des émissions de gaz polluant. L'invention contribue à renforcer les conditions de sécurité sur le lieu de travail, en évitant les fuites de gaz chauds et nocifs. L'invention contribue également à assurer une meilleure propreté de ces lieux de travail.The invention also makes it possible to protect the environment by controlling the tightness of the coke oven doors and by avoiding polluting gas emissions. The invention contributes to strengthening safety conditions in the workplace, by preventing the leakage of hot and harmful gases. The invention also contributes to ensuring better cleanliness of these workplaces.

Claims (3)

Dispositif d'étanchéité entre une porte (14) d'un four à coke (10) et un cadre de porte (16), comportant un organe d'étanchéité (24) fixé sur la porte, présentant un bord de jonction (28) avec le cadre (16), comportant un canal (44) solidaire de la porte, adjacent à l'organe d'étanchéité (24), alimenté par un gaz d'étanchéité ayant une pression supérieure à celle existant à l'intérieur du four, caractérisé en ce que le canal (44) s'étend sur toute la périphérie de la porte (14) et comprend plusieurs compartiments (44A-44H) respectivement alimentés en gaz d'étanchéité par des conduits d'alimentation (48A-48H) distincts, chaque conduit d'alimentation (48A-48H) comportant des moyens de réglage (50A-50H) du débit de gaz d'étanchéité.Sealing device between a door (14) of a coke oven (10) and a door frame (16), comprising a sealing member (24) fixed on the door, having a joining edge (28) with the frame (16), comprising a channel (44) integral with the door, adjacent to the sealing member (24), supplied with a sealing gas having a pressure higher than that existing inside the oven , characterized in that the channel (44) extends over the entire periphery of the door (14) and comprises several compartments (44A-44H) respectively supplied with sealing gas by supply conduits (48A-48H) separate, each supply conduit (48A-48H) comprising means (50A-50H) for adjusting the flow rate of sealing gas. Dispositif selon la revendication 1, caractérisé en ce que l'organe d'étanchéité (24) est délimité par des lames (24A, 24B, 24C, 24D), un premier bord d'extrémité (28) de l'organe (24) formant le bord de jonction (28) avec le cadre de porte (16), le second bord d'extrémité (30) de l'organe (24) comportant des découpes (32).Device according to claim 1, characterized in that the sealing member (24) is delimited by blades (24A, 24B, 24C, 24D), a first end edge (28) of the member (24) forming the joining edge (28) with the door frame (16), the second end edge (30) of the member (24) having cutouts (32). Four à coke comprenant au moins un cadre de porte (16) délimitant une ouverture (12) et au moins une porte (14) montée mobile par rapport à ce cadre (16) suivant une direction sensiblement parallèle à l'axe (X-X) de ladite ouverture (12), caractérisé en ce qu'il comprend un dispositif d'étanchéité tel que défini dans l'une quelconque des revendications précédentes.Coke oven comprising at least one door frame (16) delimiting an opening (12) and at least one door (14) mounted movable relative to this frame (16) in a direction substantially parallel to the axis (XX) of said opening (12), characterized in that it comprises a sealing device as defined in any one of the preceding claims.
EP92402289A 1991-08-21 1992-08-13 Sealing means between the coke oven door and the door frame Expired - Lifetime EP0533515B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110497A FR2680561A1 (en) 1991-08-21 1991-08-21 SEALING DEVICE BETWEEN A DOOR OF A COKE OVEN AND A DOOR FRAME.
FR9110497 1991-08-21

Publications (2)

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EP0533515A1 true EP0533515A1 (en) 1993-03-24
EP0533515B1 EP0533515B1 (en) 1994-06-22

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EP92402289A Expired - Lifetime EP0533515B1 (en) 1991-08-21 1992-08-13 Sealing means between the coke oven door and the door frame

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US (1) US5254222A (en)
EP (1) EP0533515B1 (en)
JP (1) JPH05230465A (en)
KR (1) KR930004440A (en)
AT (1) ATE107687T1 (en)
BR (1) BR9203250A (en)
DE (1) DE69200208T2 (en)
DK (1) DK0533515T3 (en)
ES (1) ES2059198T3 (en)
FR (1) FR2680561A1 (en)
PL (1) PL295677A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5783046A (en) * 1994-11-28 1998-07-21 Gentech, Inc. Process and apparatus for the destructive distillation of rubber
ATE175989T1 (en) * 1994-12-17 1999-02-15 Krupp Uhde Gmbh COKE OVEN DOOR UNIT WITH SEALING MEMBRANE
AU764489B2 (en) * 1999-10-26 2003-08-21 Deutsche Montan Technologie Gmbh Coke oven door with gas channel and door sealing strip
DE10331658B3 (en) * 2003-01-31 2004-05-06 Deutsche Montan Technologie Gmbh Seal for coke oven door is fastened to body of door and comprises sealing edge and slots in comb-like configuration
BRPI0406530A (en) 2003-01-31 2005-12-13 Montan Tech Gmbh Coke oven door seals and their use

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156762B (en) * 1961-11-21 1963-11-07 Didier Werke Ag Coke oven door with sealing gas seal
US4016045A (en) * 1976-02-18 1977-04-05 Koppers Company, Inc. Coke oven door sealing system
US4172769A (en) * 1978-09-27 1979-10-30 Koppers Company, Inc. Coke oven door seal and jamb
FR2495631A1 (en) * 1980-12-05 1982-06-11 Chaudouet Jacques Seals for doors on coke ovens - where two seals form chamber fed with steam at higher pressure than that inside oven so no leakage of fumes from oven occurs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156762B (en) * 1961-11-21 1963-11-07 Didier Werke Ag Coke oven door with sealing gas seal
US4016045A (en) * 1976-02-18 1977-04-05 Koppers Company, Inc. Coke oven door sealing system
US4172769A (en) * 1978-09-27 1979-10-30 Koppers Company, Inc. Coke oven door seal and jamb
FR2495631A1 (en) * 1980-12-05 1982-06-11 Chaudouet Jacques Seals for doors on coke ovens - where two seals form chamber fed with steam at higher pressure than that inside oven so no leakage of fumes from oven occurs

Also Published As

Publication number Publication date
BR9203250A (en) 1993-04-06
FR2680561A1 (en) 1993-02-26
KR930004440A (en) 1993-03-22
JPH05230465A (en) 1993-09-07
ES2059198T3 (en) 1994-11-01
EP0533515B1 (en) 1994-06-22
US5254222A (en) 1993-10-19
DK0533515T3 (en) 1994-08-22
PL295677A1 (en) 1993-05-04
ATE107687T1 (en) 1994-07-15
DE69200208T2 (en) 1994-12-08
DE69200208D1 (en) 1994-07-28

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