EP3728947A1 - Burner maintenance tool - Google Patents

Burner maintenance tool

Info

Publication number
EP3728947A1
EP3728947A1 EP18833934.5A EP18833934A EP3728947A1 EP 3728947 A1 EP3728947 A1 EP 3728947A1 EP 18833934 A EP18833934 A EP 18833934A EP 3728947 A1 EP3728947 A1 EP 3728947A1
Authority
EP
European Patent Office
Prior art keywords
scraper
support tube
burner
axis
cleaning
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
EP18833934.5A
Other languages
German (de)
French (fr)
Other versions
EP3728947B1 (en
Inventor
Antoine LARIGNON
Guan SENMU
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.)
Fives Pillard SA
Original Assignee
Fives Pillard SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fives Pillard SA filed Critical Fives Pillard SA
Publication of EP3728947A1 publication Critical patent/EP3728947A1/en
Application granted granted Critical
Publication of EP3728947B1 publication Critical patent/EP3728947B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/50—Cleaning devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
    • B08B1/165—Scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B08B1/36—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members rotating about an axis orthogonal to the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/04—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by a combination of operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F23D11/386—Nozzle cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2209/00—Details of machines or methods for cleaning hollow articles
    • B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
    • B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
    • B08B2209/04—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces using cleaning devices introduced into and moved along the pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00002—Cleaning burner parts, e.g. burner tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/31018—Nozzles and cleaning devices therefor

Definitions

  • the present invention relates to rotary kilns and more particularly to the burners of these furnaces.
  • the burners present in rotary kilns (in particular cement mills, lime producers, etc.) generate high air flows at very high speeds (200-300 m / s). . These levels of speed can, depending on the conditions prevailing in the furnace (temperature, quantity of dust, percentage of liquid phase in the chemical compounds) create concretions fixing on the tips of the burner. Their accumulations end up reducing the performance of the burner, by deflection of the flame, which has consequences on the process (quality of production, lifetime of refractory lining of the furnace ...), which can oblige the user to stop his oven to clean the burner tips.
  • the object of the invention is to set up a nozzle cleaning system for performing a safe maintenance operation, with the burner in operation, and without risking a costly oven stop.
  • the object of the invention consists of a device for cleaning the tips of a burner present on the rotary furnaces, said device consists of an X-axis support tube intended to pass through said burner and is characterized in that the support tube comprises a metal cable connected at one of its ends to a scraper and at the other end to a setting and holding system in position of the scraper, the scraper is articulated on the support tube between a first position aligned with the X axis in the extension of the support tube and a second position perpendicular to the X axis, that the scraper has a beveled portion on its profile and that the support tube is connected to a rotation system of the entire device.
  • the device may for example be made of refractory stainless steel.
  • the support tube is connected to a means of hammering along the axis X. It is thus possible to translate the scraper back and forth along the axis X in a periodic longitudinal movement or not, which creates repeated blows on said tip by the scraper.
  • the cleaning of the tips can be done by scouring action by a rotational movement or by hammering action by a translational movement or by the combination of the two actions.
  • the metal cable is disposed outside the support tube.
  • a set of guide tubes attached to the support tube holds the cable in the correct position to prevent any pinching between the tool and the tube in which it is inserted.
  • the cable may be disposed inside the support tube to benefit from the mechanical protection thereof. So nothing protrudes from the support tube in the burner
  • the support tube and the scraper have a diameter F ⁇ 73mm.
  • the diameter of the support tube and the scraper are small in size so that they can be inserted into a standard tube. The device is thus compact and able to be inserted in most burners without expensive modification, by an opening of reduced section.
  • the scraper is removable and interchangeable. It is thus possible to adapt to different burner diameters by choosing longer or shorter scrapers and choose different types of scrapers, more or less sharpened to improve the scouring of the tip, and whether or not to inject the scraper. pressurized air or powdery materials.
  • the support tube is removable and interchangeable. It is thus possible to adapt to the different lengths of burners by choosing longer or shorter tubes, or even by welding an additional tube on the support tube.
  • the cable is sufficiently long or it is replaced according to the new length of the burner.
  • the support tube and the scraper are hollow and communicating, the support tube is open on both sides, the scraper comprises holes communicating with the inside of said scraper and arranged on one side and the support tube and the scraper are intended to be traveled by compressed air.
  • the compressed air flows from the support tube to the scraper.
  • the compressed air is injected into the support tube up to the inside of the wiper from which it leaves through the holes, and it allows a cleaning mode adapted to certain conditions of fouling of the burner, it also allows to maintain more long the scraper in the flame, without risking its degradation due to high temperatures inside the oven.
  • the support tube and the scraper are hollow and communicating, the support tube is open on both sides, the scraper comprises holes communicating with the inside of said scraper and arranged on one side and the support tube and the scraper are traversed a fluid loaded with a material.
  • the powdery material circulates from the powder circulates from the support tube to the scraper.
  • the fluid loaded with a powdery material such as sand allows a cleaning mode adapted to severe burner fouling conditions.
  • the fluid used may be compressed air.
  • the holes may be of a larger diameter.
  • the system for rotating the entire device is a motorized steering wheel.
  • the cleaning can thus be automated.
  • the invention also relates to a method of cleaning a rotary kiln burner, it is characterized in that it comprises the following steps: - insertion and placement of the device according to one of the preceding claims in the burner,
  • the device allows a simple and effective mechanical cleaning process.
  • the insertion and placement of the device is made using a jack. It is thus possible to automate the process.
  • the device is moved in translation along the X axis manually or with the aid of a motorized jack, which in addition to the scraping force, to make a hammering effort on too large collages.
  • the cleaning of the end pieces is done by scouring action by a rotational movement or by hammering action by a translational movement or by the combination of the two actions
  • the wire rope is connected to the other of its ends to a motorized winch. It is thus possible to automate the process.
  • Other advantages may still appear to those skilled in the art on reading the examples below, illustrated by the appended figures given by way of example:
  • FIG. 1 is a perspective view of the device according to the invention
  • FIG. 2 is a section of the device along the X axis
  • FIG. 2A is a section of the device according to AA
  • FIG. 3 is a section of the scraper aligned with the tube
  • FIG. 4 is a section of the scraper according to IV-IV,
  • FIG. 5 is a schematic view of a burner equipped with the device according to the invention.
  • Figures 6 and 7 are front views of the tip of different burners with the device according to the invention.
  • the device 1 comprises a support tube 2 of X axis, a metal cable 3, a scraper 4 of elongated shape attached to the support tube 2, a system 5 for placing and holding in position the scraper 4, a means 6 for setting rotation of the device 1.
  • the metal cable 3 is placed along the support tube 2 (FIG. 2A) in guide tubes 21 fixed to the support tube 2, but it can also be placed inside the support tube 2 (FIG. 5). .
  • the wire rope 3 is connected at one of its ends to the scraper 4 and at the other end to a system 5 for placing and holding the scraper 4 in position.
  • the scraper 4 is articulated on the support tube 2 about a Y axis perpendicular to the X axis at the end of said support tube 2. It has two positions: a position aligned on the X axis in the extension of the tube 2 and a second position perpendicular to the X axis corresponding to the position of use of the scraper 4.
  • the system 5 allows the tilting of the wiper from one position to the other and its holding in position.
  • the system 5 consists of a lever arm 50 driving a pulley 51 on which the wire rope 3 is wound.
  • the lever arm 50 can be locked in order to immobilize the scraper 4.
  • the support tube 2 is connected to a wheel 60 which is the rotating means 6. It can be motorized.
  • the scraper 4 is hollow and has holes 40 connecting the hollow 41 to the outside. These holes 40 are distributed over the length of the scraper 4. They may be evenly distributed or not.
  • the scraper 4 has a beveled portion 42 on its profile.
  • the bevelled portion 42 has two faces 420 and 421. One face is pierced with holes 40, or both. When both sides 420 and 421 are both drilled, the holes 40 may be staggered or staggered from one face to the other or not.
  • the scraper 4 has a bore 43 near its hinge 44, this bore is aligned with the inside 20 of the support tube 2 when the scraper is perpendicular to the support tube in the use position.
  • the device 1 is placed in the extended position where the support tube 2 and the scraper 4 are in the extension of one another as illustrated in FIG. 3.
  • the device 1 is introduced into the burner 7 from the rear of said burner 7 until the scraper 4 comes out completely from the burner on the oven side.
  • the introduction can be done in the center or not.
  • the system 5 is actuated which tilts the scraper 4 from its extended position to its position perpendicular to the support tube 2 and holds it in position against the nozzle 70 of the burner.
  • the positioning and holding system in position is achieved by means of a ratchet winch applied to a toothed wheel which allows the scraper to remain in abutment on the endpiece 70.
  • the device 1 is rotated by the steering wheel 60 manually or by a motor, driving the scraper 4 which will rub over the entire periphery of the nozzle 70 of the burner 7 and remove the concretions that are accumulated therein.
  • the device 1 can also be moved in translation along the X axis manually or by a motorized jack, driving the scraper 4 which will hammering the surface of the tip 70 of the burner 7 and detach the concretions that are accumulated therein.
  • the device offers several possibilities.
  • the scraper 4 being removable and interchangeable, one can choose different types of scraper 4.
  • the system is set in motion by means 6 of rotation 6, this means can be manual or automated by a mechanism type cylinder and motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)

Abstract

The present invention relates to a device (1) for cleaning the tips (70) of a burner (7) present on rotary kilns, said device (1) consists of a support tube (2) of axis X designed to pass through said burner, and it is characterized in that the support tube (2) comprises a metal cable (3) connected at one of its ends to a scraper (4) and at the other end to a system (5) for positioning the scraper and holding it in position, in that the scraper (4) is articulated on the support tube (2) between a first position aligned on the axis X extending from the support tube and a second position perpendicular to the axis X, and in that the support tube (2) is connected to a system (6) for rotating the whole device. It can be put in place and manipulated from the rear of the burner, which ensures safety for interventions. Its rotation and/or translation about the tip of the burner makes it possible to effectively clean off concretions of any kind (shape, hardness, etc.) or position.

Description

OUTIL DE MAINTENANCE POUR BRÛLEUR  MAINTENANCE TOOL FOR BURNER
La présente invention se rapporte aux fours rotatifs et plus particulièrement aux brûleurs de ces fours. The present invention relates to rotary kilns and more particularly to the burners of these furnaces.
Pour obtenir une combustion correcte et une forme de flamme maîtrisée, les brûleurs présents dans les fours rotatifs (notamment cimentier, producteur de chaux...) génèrent des écoulements d’air à hautes voir très hautes vitesses (200-300 m/s). Ces niveaux de vitesses peuvent en fonction des conditions régnant dans le four (température, quantité de poussière, pourcentage de phase liquide dans les composés chimiques) créer des concrétions se fixant sur les embouts du brûleur. Leurs accumulations finissent par réduire les performances du brûleur, par déviation de la flamme, ce qui entraîne des conséquences sur le process (qualité de production, durée de vie du revêtement réfractaire du four ...), pouvant obliger l'utilisateur à arrêter son four pour nettoyer les embouts du brûleur.  In order to obtain a correct combustion and a controlled flame shape, the burners present in rotary kilns (in particular cement mills, lime producers, etc.) generate high air flows at very high speeds (200-300 m / s). . These levels of speed can, depending on the conditions prevailing in the furnace (temperature, quantity of dust, percentage of liquid phase in the chemical compounds) create concretions fixing on the tips of the burner. Their accumulations end up reducing the performance of the burner, by deflection of the flame, which has consequences on the process (quality of production, lifetime of refractory lining of the furnace ...), which can oblige the user to stop his oven to clean the burner tips.
Pour nettoyer les concrétions, les cimentiers utilisent en fonctionnement une barre métallique, une lance à eau ... Ces dispositifs sont sommaires et très peu efficaces, mais surtout dangereux pour les personnels et l’imprécision des nettoyages provoque un endommagement du réfractaire protégeant le brûleur.  To clean the concretions, the cement manufacturers use in operation a metal bar, a water lance ... These devices are summary and very inefficient, but especially dangerous for the personnel and the imprecision of the cleanings causes a damage of the refractory protecting the burner .
Il existe un besoin d’empêcher l’accumulation de concrétions sur les embouts du brûleur qui peuvent générer des bouchages de l’air entraînant des déviations de flamme, tout en évitant d'arrêter la production liés aux dommages sur les briques réfractaires induites par une déviation de flamme, ou la dégradation de la qualité de la production et proposer une solution sûre et fiable pour cette opération de maintenance indispensable.  There is a need to prevent the accumulation of concretions on the burner tips which can generate air blockages resulting in flame deviations, while avoiding stopping the production related to the damage on the refractory bricks induced by a fire. flame deviation, or the degradation of the quality of production and offer a safe and reliable solution for this essential maintenance operation.
L'objet de l'invention est de mettre en place un système de nettoyage des embouts permettant d’effectuer une opération de maintenance sans danger, avec le brûleur en fonctionnement, et sans risquer un arrêt four qui est coûteux. L’objet de l’invention consiste en un dispositif de nettoyage des embouts d’un brûleur présent sur les fours rotatifs, ledit dispositif est constitué d’un tube support d'axe X destiné à traverser ledit brûleur et il est caractérisé en ce que le tube support comprend un câble métallique relié à l’une de ses extrémités à un racleur et à l’autre extrémité à un système de mise et de maintien en position du racleur, que le racleur est articulé sur le tube support entre une première position alignée sur l'axe X dans le prolongement du tube support et un deuxième position perpendiculaire à l'axe X, que le racleur a une partie biseauté sur son profil et que le tube support est relié à un système de mise en rotation de l’ensemble du dispositif. Il peut être mis en place et manipulé par l’arrière du brûleur ce qui garantit une bonne sécurité pour les interventions. Sa rotation autour de l'embout du brûleur permet de nettoyer efficacement les concrétions quel que soit leur nature (forme, dureté...). Il est suffisamment robuste pour pouvoir être utilisé sans arrêter le brûleur lors de son fonctionnement (tenue en température, maintien en position, répétabilité de l’utilisation). Le dispositif pourra par exemple être en inox réfractaire. The object of the invention is to set up a nozzle cleaning system for performing a safe maintenance operation, with the burner in operation, and without risking a costly oven stop. The object of the invention consists of a device for cleaning the tips of a burner present on the rotary furnaces, said device consists of an X-axis support tube intended to pass through said burner and is characterized in that the support tube comprises a metal cable connected at one of its ends to a scraper and at the other end to a setting and holding system in position of the scraper, the scraper is articulated on the support tube between a first position aligned with the X axis in the extension of the support tube and a second position perpendicular to the X axis, that the scraper has a beveled portion on its profile and that the support tube is connected to a rotation system of the entire device. It can be put in place and manipulated by the back of the burner which guarantees a good safety for the interventions. Its rotation around the nozzle of the burner makes it possible to effectively clean the concretions whatever their nature (shape, hardness ...). It is robust enough to be used without stopping the burner during its operation (temperature resistance, holding in position, repeatability of use). The device may for example be made of refractory stainless steel.
Avantageusement, le tube support est relié à un moyen de martèlement selon l'axe X. Il est ainsi possible de translater le racleur d’avant en arrière suivant l’axe X selon un mouvement longitudinal périodique ou non, ce qui crée des coups répétés sur ledit embout par le racleur. Ainsi, le nettoyage des embouts peut se faire par action de récurage par un mouvement de rotation ou par action de martèlement par un mouvement de translation ou par la combinaison des deux actions.  Advantageously, the support tube is connected to a means of hammering along the axis X. It is thus possible to translate the scraper back and forth along the axis X in a periodic longitudinal movement or not, which creates repeated blows on said tip by the scraper. Thus, the cleaning of the tips can be done by scouring action by a rotational movement or by hammering action by a translational movement or by the combination of the two actions.
Avantageusement, le câble métallique est disposé à l’extérieur du tube support. Un ensemble de tubes guide fixés au tube support, maintient le câble à la bonne position pour éviter tout pincement entre l’outil et le tube dans lequel il est inséré.  Advantageously, the metal cable is disposed outside the support tube. A set of guide tubes attached to the support tube holds the cable in the correct position to prevent any pinching between the tool and the tube in which it is inserted.
En variante, le câble peut être disposé à l’intérieur du tube support pour bénéficier de la protection mécanique de celui-ci. Ainsi rien ne dépasse du tube support dans le brûleur Avantageusement, le tube support et le racleur ont un diamètre F < 73mm. Le diamètre du tube support et du racleur sont de taille restreinte de manière à pouvoir être inséré dans un tube standard. Le dispositif est ainsi compact et apte à être inséré dans la plupart des brûleurs sans modification coûteuse, par une ouverture de section réduite. Alternatively, the cable may be disposed inside the support tube to benefit from the mechanical protection thereof. So nothing protrudes from the support tube in the burner Advantageously, the support tube and the scraper have a diameter F <73mm. The diameter of the support tube and the scraper are small in size so that they can be inserted into a standard tube. The device is thus compact and able to be inserted in most burners without expensive modification, by an opening of reduced section.
Avantageusement, le racleur est démontable et interchangeable. Il est ainsi possible de s’adapter aux différents diamètres de brûleurs en choisissant des racleurs plus ou moins longs et choisir différents types de racleurs, plus ou moins affûté pour améliorer le récurage de l’embout, et permettant ou non d'injecter de l'air sous pression ou des matériaux pulvérulents.  Advantageously, the scraper is removable and interchangeable. It is thus possible to adapt to different burner diameters by choosing longer or shorter scrapers and choose different types of scrapers, more or less sharpened to improve the scouring of the tip, and whether or not to inject the scraper. pressurized air or powdery materials.
Avantageusement, le tube support est démontable et interchangeable. Il est ainsi possible de s’adapter aux différentes longueurs de brûleurs en choisissant des tubes plus ou moins longs, voire en soudant un tube supplémentaire sur le tube support. Le câble est prévu suffisamment long ou il est remplacé en fonction de la nouvelle longueur du brûleur.  Advantageously, the support tube is removable and interchangeable. It is thus possible to adapt to the different lengths of burners by choosing longer or shorter tubes, or even by welding an additional tube on the support tube. The cable is sufficiently long or it is replaced according to the new length of the burner.
Avantageusement, le tube support et le racleur sont creux et communiquant, le tube support est ouvert des deux côtés, le racleur comprend des trous communiquant avec l'intérieur dudit racleur et disposés sur un côté et le tube support et le racleur sont destinés à être parcourrus par de l'air comprimé. L'air comprimé circule du tube support vers le racleur. L'air comprimé est injecté dans le tube support jusqu'à l'intérieur du racleur d'où il sort par les trous, et il permet un mode de nettoyage adapté à certaines conditions d’encrassement du brûleur, il permet également de maintenir plus longtemps le racleur dans la flamme, sans risquer sa dégradation liée aux températures élevées à l’intérieur du four.  Advantageously, the support tube and the scraper are hollow and communicating, the support tube is open on both sides, the scraper comprises holes communicating with the inside of said scraper and arranged on one side and the support tube and the scraper are intended to be traveled by compressed air. The compressed air flows from the support tube to the scraper. The compressed air is injected into the support tube up to the inside of the wiper from which it leaves through the holes, and it allows a cleaning mode adapted to certain conditions of fouling of the burner, it also allows to maintain more long the scraper in the flame, without risking its degradation due to high temperatures inside the oven.
Avantageusement, le tube support et le racleur sont creux et communiquant, le tube support est ouvert des deux côtés, le racleur comprend des trous communiquant avec l'intérieur dudit racleur et disposés sur un côté et le tube support et le racleur sont parcourus un fluide chargé d’un matériau. Le matériau pulvérulent circule du pulvérulent circule du du tube support vers le racleur. De la même façon que pour l'air comprimé, le fluide chargé d’un matériau pulvérulent comme par exemple du sable permet un mode de nettoyage adapté à des conditions d’encrassement du brûleur importante. Le fluide utilisé pourra être de l'air comprimé. Dans ce cas les trous pourront être d'un diamètre plus important. Advantageously, the support tube and the scraper are hollow and communicating, the support tube is open on both sides, the scraper comprises holes communicating with the inside of said scraper and arranged on one side and the support tube and the scraper are traversed a fluid loaded with a material. The powdery material circulates from the powder circulates from the support tube to the scraper. In the same way as for compressed air, the fluid loaded with a powdery material such as sand allows a cleaning mode adapted to severe burner fouling conditions. The fluid used may be compressed air. In this case the holes may be of a larger diameter.
Avantageusement, le système de mise en rotation de l’ensemble du dispositif est un volant motorisé. Le nettoyage peut ainsi être automatisé.  Advantageously, the system for rotating the entire device is a motorized steering wheel. The cleaning can thus be automated.
L'invention concerne également un procédé de nettoyage d'un brûleur de four rotatif, il est caractérisé en ce qu'il comprend les étapes suivantes: - insertion et placement du dispositif selon une des revendications précédentes dans le brûleur,  The invention also relates to a method of cleaning a rotary kiln burner, it is characterized in that it comprises the following steps: - insertion and placement of the device according to one of the preceding claims in the burner,
- mise en position du racleur de la première position alignée à la deuxième position perpendiculaire par le système de mise et de maintien en position,  placing the scraper of the first position aligned at the second perpendicular position by the position-keeping and holding system,
- maintien en position du racleur à l’aide du système de mise et de maintien en position et - Keeping the scraper in position by means of the setting and holding system in position and
- mise en rotation du dispositif à l’aide du système de mise en rotation. - Rotating the device using the rotation system.
Le dispositif permet un procédé de nettoyage mécanique simple et efficace. The device allows a simple and effective mechanical cleaning process.
Avantageusement, l'insertion et le placement du dispositif est faite à l'aide d'un vérin. Il est ainsi possible d'automatiser le procédé.  Advantageously, the insertion and placement of the device is made using a jack. It is thus possible to automate the process.
Avantageusement, le dispositif est mis en translation selon l'axe X manuellement ou à l’aide d’un vérin motorisé, ce qui permet en plus de l’effort de raclement, d’effectuer un effort de martèlement sur les collages trop importants.  Advantageously, the device is moved in translation along the X axis manually or with the aid of a motorized jack, which in addition to the scraping force, to make a hammering effort on too large collages.
Ainsi, le nettoyage des embouts se fait par action de récurage par un mouvement de rotation ou par action de martèlement par un mouvement de translation ou par la combinaison des deux actions  Thus, the cleaning of the end pieces is done by scouring action by a rotational movement or by hammering action by a translational movement or by the combination of the two actions
Avantageusement, le câble métallique est relié à l'autre de ses extrémités à un treuil motorisé. Il est ainsi possible d'automatiser le procédé. D’autres avantages pourront encore apparaître à l’homme du métier à la lecture des exemples ci-dessous, illustrés par les figures annexées, donnés à titre d’exemple : Advantageously, the wire rope is connected to the other of its ends to a motorized winch. It is thus possible to automate the process. Other advantages may still appear to those skilled in the art on reading the examples below, illustrated by the appended figures given by way of example:
La figure 1 est une perspective du dispositif selon l'invention, - La figure 2 est une coupe du dispositif selon l'axe X,  FIG. 1 is a perspective view of the device according to the invention; FIG. 2 is a section of the device along the X axis;
La figure 2A est une coupe du dispositif selon AA,  FIG. 2A is a section of the device according to AA,
La figure 3 est une coupe du racleur aligné avec le tube,  FIG. 3 is a section of the scraper aligned with the tube,
La figure 4 est une coupe du racleur selon IV-IV,  FIG. 4 is a section of the scraper according to IV-IV,
La figure 5 est une vue schématique d'un brûleur équipé du dispositif selon l'invention,  FIG. 5 is a schematic view of a burner equipped with the device according to the invention,
Les figures 6 et 7 sont des vues de face de l'embout de différents brûleurs avec le dispositif selon l'invention.  Figures 6 and 7 are front views of the tip of different burners with the device according to the invention.
Le dispositif 1 comprend un tube support 2 d'axe X, un câble métallique 3, un racleur 4 de forme allongée fixé au tube support 2, un système 5 de mise et de maintien en position du racleur 4, un moyen 6 de mise en rotation du dispositif 1.  The device 1 comprises a support tube 2 of X axis, a metal cable 3, a scraper 4 of elongated shape attached to the support tube 2, a system 5 for placing and holding in position the scraper 4, a means 6 for setting rotation of the device 1.
A la figure 1 , le câble métallique 3 est placé le long du tube support 2 (figure 2A) dans des tubes guides 21 fixés au tube support 2, mais il pourra aussi être disposé à l'intérieur du tube support 2 (figure 5).  In FIG. 1, the metal cable 3 is placed along the support tube 2 (FIG. 2A) in guide tubes 21 fixed to the support tube 2, but it can also be placed inside the support tube 2 (FIG. 5). .
Le câble métallique 3 est relié à l’une de ses extrémités au racleur 4 et à l’autre extrémité à un système 5 de mise et de maintien en position du racleur 4.  The wire rope 3 is connected at one of its ends to the scraper 4 and at the other end to a system 5 for placing and holding the scraper 4 in position.
Le racleur 4 est articulé sur le tube support 2 autour d'un axe Y perpendiculaire à l'axe X à l'extrémité dudit tube support 2. Il a deux positions: une position alignée sur l'axe X dans le prolongement du tube 2 et une deuxième position perpendiculaire à l'axe X correspondant à la position d'utilisation du racleur 4. Le système 5 permet le basculement du racleur d'une position à l'autre et son maintien en position. Le système 5 est constitué d'un bras de levier 50 entraînant une poulie 51 sur laquelle est enroulé le câble métallique 3. Le bras de levier 50 peut être bloqué pour immobiliser le racleur 4. Sur les figures 1 et 2, le tube support 2 est relié à un volant 60 qui constitue le moyen de mise en rotation 6. Il pourra être motorisé. The scraper 4 is articulated on the support tube 2 about a Y axis perpendicular to the X axis at the end of said support tube 2. It has two positions: a position aligned on the X axis in the extension of the tube 2 and a second position perpendicular to the X axis corresponding to the position of use of the scraper 4. The system 5 allows the tilting of the wiper from one position to the other and its holding in position. The system 5 consists of a lever arm 50 driving a pulley 51 on which the wire rope 3 is wound. The lever arm 50 can be locked in order to immobilize the scraper 4. In Figures 1 and 2, the support tube 2 is connected to a wheel 60 which is the rotating means 6. It can be motorized.
Dans une variante, le racleur 4 est creux et présente des trous 40 reliant le creux 41 à l'extérieur. Ces trous 40 sont répartis sur la longueur du racleur 4. Ils pourront être répartis régulièrement ou non.  In a variant, the scraper 4 is hollow and has holes 40 connecting the hollow 41 to the outside. These holes 40 are distributed over the length of the scraper 4. They may be evenly distributed or not.
Comme visible figure 4, le racleur 4 a une partie biseauté 42 sur son profil. La partie biseauté 42 présente deux faces 420 et 421. Une face est percée de trous 40, ou les deux. Lorsque les deux faces 420 et 421 sont toutes les deux percées, les trous 40 peuvent être décalés ou en quinconce d'une face à l'autre ou non.  As can be seen in FIG. 4, the scraper 4 has a beveled portion 42 on its profile. The bevelled portion 42 has two faces 420 and 421. One face is pierced with holes 40, or both. When both sides 420 and 421 are both drilled, the holes 40 may be staggered or staggered from one face to the other or not.
Le racleur 4 présente un perçage 43 près de son articulation 44, ce perçage est aligné avec l'intérieur 20 du tube support 2 lorsque le racleur est perpendiculaire au tube support en position d'utilisation.  The scraper 4 has a bore 43 near its hinge 44, this bore is aligned with the inside 20 of the support tube 2 when the scraper is perpendicular to the support tube in the use position.
Nous allons maintenant décrire le procédé de nettoyage d'un brûleur 7 par le dispositif 1.  We will now describe the method of cleaning a burner 7 by the device 1.
Le dispositif 1 est mis en position allongée où le tube support 2 et le racleur 4 sont dans le prolongement l'un de l'autre comme illustré figure 3. Le dispositif 1 est introduit dans le brûleur 7 depuis l'arrière dudit brûleur 7 jusqu'à ce que le racleur 4 sorte totalement du brûleur coté four. L'introduction peut être réalisée au centre ou non.  The device 1 is placed in the extended position where the support tube 2 and the scraper 4 are in the extension of one another as illustrated in FIG. 3. The device 1 is introduced into the burner 7 from the rear of said burner 7 until the scraper 4 comes out completely from the burner on the oven side. The introduction can be done in the center or not.
On actionne le système 5 qui fait basculer le racleur 4 de sa position allongée à sa position perpendiculaire au tube support 2 et le maintien en position en appui sur l'embout 70 du brûleur. Le système de mise et de maintien en position est réalisé par l’intermédiaire d’un treuil à cliquet appliqué à une roue dentée qui permet au racleur de rester en appui sur l’embout 70.  The system 5 is actuated which tilts the scraper 4 from its extended position to its position perpendicular to the support tube 2 and holds it in position against the nozzle 70 of the burner. The positioning and holding system in position is achieved by means of a ratchet winch applied to a toothed wheel which allows the scraper to remain in abutment on the endpiece 70.
Le dispositif 1 est mis en rotation par le volant 60 manuellement ou par un moteur, entraînant le racleur 4 qui va frotter sur toute la périphérie de l'embout 70 du brûleur 7 et retirer les concrétions qui y sont accumulées.  The device 1 is rotated by the steering wheel 60 manually or by a motor, driving the scraper 4 which will rub over the entire periphery of the nozzle 70 of the burner 7 and remove the concretions that are accumulated therein.
Le dispositif 1 peut également être mû en translation suivant l’axe X manuellement ou par un vérin motorisé, entraînant le racleur 4 qui va marteler la surface de l'embout 70 du brûleur 7 et détacher les concrétions qui y sont accumulées. The device 1 can also be moved in translation along the X axis manually or by a motorized jack, driving the scraper 4 which will hammering the surface of the tip 70 of the burner 7 and detach the concretions that are accumulated therein.
En fonction de la nature des différents collages (forme, dureté...), le dispositif offre plusieurs possibilités. Le racleur 4 étant démontable et interchangeable, on peut choisir différent types de racleur 4.  Depending on the nature of the different collages (shape, hardness ...), the device offers several possibilities. The scraper 4 being removable and interchangeable, one can choose different types of scraper 4.
Si le concrétions sont collées de façon peu dure et sont de taille peu importante cela nécessite qu'une courte durée d’utilisation de l’outil (<5min), on équipera le dispositif 1 d’un racleur 4 permettant un nettoyage mécanique simple, par exemple sans trous 40.  If the concretions are glued in a little hard way and are of small size it requires that a short duration of use of the tool (<5min), we will equip the device 1 with a scraper 4 for a simple mechanical cleaning, for example without holes 40.
Si les concrétions sont collées de façon dure mais sont de taille peu importante, cela nécessite une durée d’utilisation de l’outil plus importante (>5min), on équipera le dispositif 1 d’un racleur 4 avec des trous 40 permettant un nettoyage mécanique assisté d’un nettoyage pneumatique sous pression, réalisé par ajout d’air comprimé permettant :  If the concretions are stuck hard but are of small size, it requires a longer tool life (> 5min), we will equip the device 1 with a scraper 4 with holes 40 for cleaning mechanical assisted by pneumatic cleaning under pressure, achieved by adding compressed air allowing:
■ d’augmenter l’efficacité de nettoyage  ■ increase cleaning efficiency
■ de bénéficier d’un refroidissement de l’outil ■ to benefit from a cooling of the tool
Si les concrétions sont collées de façon dure et sont de taille importante, la durée d’utilisation sera plus importante (>5min) et le dispositif 1 sera équipé par un racleur 4 troué permettant un nettoyage mécanique assisté d’un nettoyage par sablage sous pression, réalisé par ajout d’air comprimé chargé d’un matériau pulvérulent (sable, abrasifs, poussière...) permettant :  If the concretions are stuck hard and are large, the duration of use will be greater (> 5min) and the device 1 will be equipped with a 4-hole scraper allowing mechanical cleaning assisted by cleaning by pressure blasting. , made by adding compressed air loaded with a powdery material (sand, abrasives, dust ...) allowing:
■ d’augmenter l’efficacité de nettoyage ■ increase cleaning efficiency
■ de bénéficier d’un refroidissement de l’outil ■ to benefit from a cooling of the tool
La mise en mouvement du système s’effectue par le moyen 6 de mise en rotation 6, ce moyen peut être manuel ou automatisé par un mécanisme de type vérin et moteur.  The system is set in motion by means 6 of rotation 6, this means can be manual or automated by a mechanism type cylinder and motor.

Claims

REVENDICATIONS
1 . Dispositif de nettoyage d'un embout d’un brûleur de four constitué d’un tube support (2) d'axe X destiné à traverser ledit brûleur et caractérisé en ce que le tube support (2) comprend un câble métallique (3) relié à l’une de ses extrémités à un racleur (4) et à l’autre extrémité à un système (5) de mise et de maintien en position du racleur (4), que le racleur (4) est articulé sur le tube support (2) entre une première position alignée sur l'axe X dans le prolongement du tube support (2) et un deuxième position perpendiculaire à l'axe X, que le racleur a une partie biseauté (42) sur son profil et que le tube support (2) est relié à un moyen de mise en rotation (6) de l’ensemble du dispositif. 1. Device for cleaning an end of a furnace burner consisting of an X-axis support tube (2) intended to pass through said burner and characterized in that the support tube (2) comprises a connected wire rope (3) at one of its ends to a scraper (4) and at the other end to a system (5) for setting and holding in position the scraper (4), that the scraper (4) is articulated on the support tube (2) between a first position aligned on the X axis in the extension of the support tube (2) and a second position perpendicular to the X axis, that the scraper has a beveled portion (42) on its profile and that the tube support (2) is connected to a means for rotating (6) the entire device.
2. Dispositif selon la revendication 1 , caractérisé en ce que le tube support (2) est relié à un moyen de martèlement selon l'axe X. 2. Device according to claim 1, characterized in that the support tube (2) is connected to a hammer means along the X axis.
3. Dispositif selon une des revendications précédentes, caractérisé en ce que le tube support (2) et le racleur (4) ont un diamètre F < 73mm. 3. Device according to one of the preceding claims, characterized in that the support tube (2) and the scraper (4) have a diameter F <73mm.
4. Dispositif selon une des revendications précédentes, caractérisé en ce que le racleur (4) est démontable et interchangeable. 4. Device according to one of the preceding claims, characterized in that the scraper (4) is removable and interchangeable.
5. Dispositif selon une des revendications précédentes, caractérisé en ce que le tube support (2) est démontable et interchangeable. 5. Device according to one of the preceding claims, characterized in that the support tube (2) is removable and interchangeable.
6. Dispositif selon une des revendications précédentes, caractérisé en ce que le tube support (2) et le racleur (4) sont creux et communiquant, que le tube support est ouvert des deux côtés, que le racleur (4) comprend des trous (40) communiquant avec l'intérieur dudit racleur et disposés sur un côté et que le tube support (2) et le racleur (4) sont destinés à être parcourrus par de l'air comprimé. 6. Device according to one of the preceding claims, characterized in that the support tube (2) and the scraper (4) are hollow and communicating, that the support tube is open on both sides, the scraper (4) comprises holes ( 40) communicating with the interior of said scraper and arranged on a side and that the support tube (2) and the scraper (4) are intended to be traversed by compressed air.
7. Dispositif selon une des revendications précédentes, caractérisé en ce que le tube support (2) et le racleur (4) sont creux et communiquant, que le tube support est ouvert des deux côtés, que le racleur (4) comprend des trous (40) communiquant avec l'intérieur dudit racleur et disposés sur un côté et le tube support (2) et le racleur (4) sont destinés à être parcourrus par un fluide chargé d’un matériau pulvérulent. 7. Device according to one of the preceding claims, characterized in that the support tube (2) and the scraper (4) are hollow and communicating, that the support tube is open on both sides, the scraper (4) comprises holes ( 40) communicating with the interior of said scraper and arranged on one side and the support tube (2) and the scraper (4) are intended to be traversed by a fluid laden with a powder material.
8. Dispositif selon une des revendications précédentes, caractérisé en ce que le moyen de mise en rotation (6) de l’ensemble du dispositif est un volant motorisé. 8. Device according to one of the preceding claims, characterized in that the means for rotating (6) of the entire device is a motorized flywheel.
9. Procédé de nettoyage d'un brûleur de four rotatif caractérisé en ce qu"il comprend les étapes suivantes: 9. A method of cleaning a rotary kiln burner characterized in that it comprises the following steps:
Insertion et placement du dispositif selon une des revendications précédentes dans le brûleur,  Inserting and placing the device according to one of the preceding claims in the burner,
mise en position du racleur de la première position alignée à la deuxième position perpendiculaire par le système (5) de mise et de maintien en position,  positioning the scraper of the first position aligned at the second perpendicular position by the system (5) for setting and holding in position,
maintien du racleur à l’aide du système (5) de mise et de maintien en position  maintaining the scraper using the system (5) for setting and holding in position
mise en rotation du dispositif à l’aide du moyen de mise en rotation (6).  rotating the device using the rotating means (6).
10. Procédé de nettoyage selon la revendication précédente, caractérisé en ce que l'insertion et le placement du dispositif est faite à l'aide d'un vérin. 10. Cleaning method according to the preceding claim, characterized in that the insertion and placement of the device is made using a jack.
1 1. Procédé de nettoyage selon une des revendications 9 ou 10, caractérisé en ce que le dispositif est mis en translation selon l'axe X manuellement ou à l’aide d’un vérin motorisé. 1 1. The cleaning method according to one of claims 9 or 10, characterized in that the device is moved in translation along the X axis manually or with the aid of a motorized cylinder.
12. Procédé de nettoyage selon une des revendications 9 à 1 1 , caractérisé en ce que le câble métallique (3) est relié à l'autre de ses extrémités à un treuil motorisé. 12. Cleaning process according to one of claims 9 to 11, characterized in that the wire rope (3) is connected at the other end thereof to a motorized winch.
EP18833934.5A 2017-12-21 2018-12-13 Burner maintenance tool and method of use thereof Active EP3728947B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1762884A FR3075930B1 (en) 2017-12-21 2017-12-21 MAINTENANCE TOOL FOR BURNER
PCT/FR2018/053274 WO2019122622A1 (en) 2017-12-21 2018-12-13 Burner maintenance tool

Publications (2)

Publication Number Publication Date
EP3728947A1 true EP3728947A1 (en) 2020-10-28
EP3728947B1 EP3728947B1 (en) 2023-03-29

Family

ID=61655933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18833934.5A Active EP3728947B1 (en) 2017-12-21 2018-12-13 Burner maintenance tool and method of use thereof

Country Status (4)

Country Link
US (1) US11885491B2 (en)
EP (1) EP3728947B1 (en)
FR (1) FR3075930B1 (en)
WO (1) WO2019122622A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117847525B (en) * 2024-03-07 2024-05-28 西安重装铜川煤矿机械有限公司 Gas stove

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR367133A (en) * 1906-06-14 1906-10-20 Albert Ganstere Scaler device
US2126838A (en) * 1937-01-13 1938-08-16 John J Stoner Cleaning device for burner tips
DE684726C (en) * 1938-01-04 1939-12-04 Heinrich Stoetzel Adjustable jackhammer
US2342228A (en) * 1942-01-30 1944-02-22 Riley Stoker Corp Gas burner
US2429299A (en) * 1945-02-28 1947-10-21 Serafinovitch Chris Method and means of cleaning burners
US2755850A (en) * 1952-07-24 1956-07-24 W M Cissell Mfg Co Inc Gas burner
US3175239A (en) * 1963-08-06 1965-03-30 Koppers Co Inc Lance carriage mounted pneumatic jack hammer
DE2157841C2 (en) * 1971-11-22 1974-01-17 Alje Renger Groningen Nanninga (Niederlande) Device for piercing the nozzle opening of a torch
US4058870A (en) * 1976-07-09 1977-11-22 C. H. Heist Corporation Lance tip construction
US8495783B2 (en) * 2006-10-06 2013-07-30 Haldor Topsoe A/S Method and apparatus for cleaning of a burner
CN205939187U (en) * 2016-08-19 2017-02-08 河南汇金智能装备有限公司 Coke cutter
CN206683425U (en) * 2017-02-28 2017-11-28 上海万澄环保科技有限公司 A kind of coke cleaning apparatus of cement rotary kiln burner
CN208860148U (en) * 2018-09-12 2019-05-14 唐山冀东水泥三友有限公司 Cement combustor carbon distribution cleaning plant
CN216174999U (en) * 2021-09-11 2022-04-05 冀东水泥黑龙江有限公司 Burner coking cleaner
CN217635690U (en) * 2022-05-30 2022-10-21 上海法孚自动化成套设备有限公司 Device for cleaning coking at head of kiln burner

Also Published As

Publication number Publication date
FR3075930B1 (en) 2020-05-22
WO2019122622A1 (en) 2019-06-27
FR3075930A1 (en) 2019-06-28
US11885491B2 (en) 2024-01-30
US20210172598A1 (en) 2021-06-10
EP3728947B1 (en) 2023-03-29

Similar Documents

Publication Publication Date Title
EP3728947B1 (en) Burner maintenance tool and method of use thereof
CA2608050A1 (en) Flow nozzle assembly
EP2456567A1 (en) Device for dispensing fluid jets without a rotating joint
EP1934546A1 (en) Device for reducing fouling in a tubular heat exchanger
EP1776299B1 (en) Conveyor belt cleaning device
BE1001124A3 (en) Pump jet a nozzle booster.
EP2741861B1 (en) Device for the cryogenic descaling of non-planar surfaces, particularly the inside of a tube
EP0174254B1 (en) mechanical device to improve the transfer of heat and to prevent clogging of heat exchangers
KR101323158B1 (en) Scraper apparatus for scailing superannuated pipes and
FR3084134A1 (en) METHOD AND APPARATUS FOR TAKING A SAMPLE OF PIPE WALL AND RE-CLOSING SPACE THUS FREE
LU81647A1 (en) METHOD AND APPARATUS FOR UNCOUPLING CLOSED DUCTS
CA2081788A1 (en) Blast furnace tap hole drilling machine
FR2685653A1 (en) Device for repairing the inner lining of a taphole, particularly for a steel works convertor
FR2776305A1 (en) Lance carrier incorporating a multifunctional securing head
FR2842580A1 (en) Rockfill dam drain manual cleaning/unblocking procedure and apparatus uses high-pressure hose attached to cannula
WO1997014010A1 (en) Rotary furnace
EP0744499B1 (en) Scraper blade for bucket chain
BE897077A (en) SPRAY GUN
FR2812463A1 (en) DEVICE FOR LAYING IN A COMPRESSED AIR DUCT OF A ROPE PROVIDED WITH A FERRET
BE1005788A6 (en) Trench-digging machine
EP3024762B1 (en) Device for scraping a conveyor belt
FR2522129A1 (en) Fixing for scraper blades on heat exchanger - has blades on drive shaft including springs to give necessary pressure
EP0495689A2 (en) Method for repairing a travelling crane drum or the like
EP2820234A2 (en) Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit
US751708A (en) Flue-scraper

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200504

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210803

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: F23D 14/50 20060101AFI20221108BHEP

INTG Intention to grant announced

Effective date: 20221207

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602018047858

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1556922

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230415

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230629

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20230329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230630

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230731

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230729

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602018047858

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231122

Year of fee payment: 6

Ref country code: DE

Payment date: 20231121

Year of fee payment: 6

Ref country code: AT

Payment date: 20231123

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20240103

REG Reference to a national code

Ref country code: AT

Ref legal event code: UEP

Ref document number: 1556922

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20231213

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20231231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230329

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231213

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231231