EP0135639A1 - Apparatus for improving the operational characteristics of a heating appliance with submerged combustion - Google Patents

Apparatus for improving the operational characteristics of a heating appliance with submerged combustion Download PDF

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Publication number
EP0135639A1
EP0135639A1 EP83401863A EP83401863A EP0135639A1 EP 0135639 A1 EP0135639 A1 EP 0135639A1 EP 83401863 A EP83401863 A EP 83401863A EP 83401863 A EP83401863 A EP 83401863A EP 0135639 A1 EP0135639 A1 EP 0135639A1
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EP
European Patent Office
Prior art keywords
installation
air
plant
programmer
ignition
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Granted
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EP83401863A
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German (de)
French (fr)
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EP0135639B1 (en
Inventor
Francois Laurent
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Individual
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Individual
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Priority to DE8383401863T priority Critical patent/DE3379592D1/en
Priority to EP19830401863 priority patent/EP0135639B1/en
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Publication of EP0135639B1 publication Critical patent/EP0135639B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/004—Combustion apparatus characterised by the shape of the combustion chamber the chamber being arranged for submerged combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel

Definitions

  • the present invention relates to a method and an installation making it possible to improve the operating characteristics of a heating installation of the submerged combustion type.
  • the combustion chamber having a relatively high thermal inertia, and being able to be brought during combustion to temperatures close to 1000 ° C., difficulties appear between each operating cycle as a result of rising water in the combustion chamber still hot after post-sweeping, leading to significant thermal constraints of the chamber, which can cause cracks and rising steam and humid air throughout the installation, which can disturb the proper functioning of the electrical components, in particular the ignition .
  • the object of the invention is to avoid the abovementioned drawbacks.
  • the process according to the invention is characterized in that, after controlled burner shutdown, the air ventilation of the installation is maintained at least for a sufficiently long time, for example of the order several minutes, to cool down to a temperature close to or below 100 ° C of the walls of the combustion chamber.
  • the method is simply implemented by controlling the supply of pressurized combustion air independently of the programmer, as soon as the installation is energized, by means of a timed opening relay supplied by the system energizing circuit and which closes as soon as the system is started up.
  • a timed opening relay supplied by the system energizing circuit and which closes as soon as the system is started up.
  • the installation further comprises, on the air blowing circuit for combustion, a bypass circuit which blows air on the spark plugs or the like and which is controlled by a solenoid valve. from a time-delayed relay energized by the programmer at the start of each ignition cycle. In this way, at the start of each ignition cycle, and before ignition is controlled by switching on the spark plugs, dry combustion air is blown on the spark plug electrodes, eliminating of these electrodes any trace of humidity, thus ensuring a trouble-free start of the cycle.
  • the installation comprises a burner 1, of the jet or other type which develops a vertical flame 2 directed downwards in a hearth 3 constituting the combustion chamber whose wall is usually metallic made up of one or more layers.
  • the products or gases of combustion escape in the form of bubbles 4 through holes 5 formed at the bottom of the chamber 3 directly in the bath to be heated 30, usually consisting of water contained in a suitable container or enclosure 31 and below level 15 of the bath.
  • the operating cycle (ignition and extinction) of the burner is controlled by an approved programmer 6 which must meet precise specifications defined by the Public authorities.
  • This programmer 6 gives orders to the motor 7 of a combustion air fan, checks the presence of the suitable air pressure measured in 8 and the suitable gas pressure measured in 9 and sends an ignition order by l 'through a high voltage transformer 10 to a spark plug 11; the programmer also gives orders to the air 12 and gas 13 solenoid valves and checks the presence of the flame by a detection member 14.
  • the programmer pre-scans the installation, i.e. scans the entire combustion chamber 3 with air only, with the air pressure in front be greater than the hydrostatic pressure of the liquid contained in the bath 30. This pre-sweep time is of the order of a minute. Then, if the air and gas pressures are suitable, the programmer 6 controls the supply of the ignition transformer 10 and the burner ignites.
  • the programmer 6 closes the solenoid valve 13 of the fuel and performs a post-scan, that is to say a post ventilation of the equipment while continuing to send air through the fan 7 throughout the installation for a time of the order of 30 seconds.
  • FIG. 2 showing the modified installation in accordance with the invention and in which the same references have been used to identify identical parts.
  • the starting of the fan motor 7 is no longer controlled by the junction 27 coming from the programmer 6, but directly by a junction 21 connected to the current supply line of the installation, it even controlled by a relay 19, the contact 18 of which is timed on opening, the relay 19 being itself supplied through the on / off button 20 of the installation.
  • the motor 7 will remain supplied by the line 21 for the time of the time delay of the contact 18 and will ensure the necessary cooling of the wall of the combustion chamber 3.
  • the time delay will be sufficient to ensure that the temperature of the internal wall of the chamber 3 will not be substantially greater than 100 ° C; with conventional power installations, this time delay may be of the order of approximately 8 to 10 minutes.
  • the electrodes 17 of the spark plug 11 will be blown into the air through a tube 22 supplied by means of a bypass solenoid valve 23 on the main air supply circuit 29 of the fan.
  • the solenoid valve 23 is supplied from the programmer junction 27 which was initially used to control the start-up of the fan in pre and post-sweeps.
  • the supply of the solenoid valve 23 is also done through the contact 24 of a relay 25 supplied by the junction 27 and delayed on closing.
  • the time delay may be approximately 30 seconds, corresponding to the pre-sweep time.

Abstract

1. Plant of the type comprising at least one burner (1) having a submerged combustion chamber (3), a fuel intake, an intake for combustion air pressurized by a blower (7) or the like and operated as soon as the plant is switched on by means of a start/stop button (20), an automatic lighting device comprising sparking means (11) or the like, a programmer (6) which successively and at the appropriate moments commands an airscavening of the plant, the arrival of fuel, ignition of the burner and stoppage of the fuel supply, the said plant being characterized in that - the blower (7) is directly supplied by the circuit (21) for switching on the plant and is controlled by means of a delayed action relay (19) which is itself energized by the said circuit (21) via the start/stop button for operating the plant ; - and in that it comprises in parallel with the intake of combustion air (29) to the burner (1) a branching circuit (22) which blows air over the spark plugs (11) or the like and which is operated by an electrically operated valve (23) via a delayed action relay (25) energized by the programmer (6), the time lag corresponding substantially to the time required for air-scavenging of the plant prior to the arrival of fuel and ignition of the burner.

Description

La présente invention concerne un procédé et une installation permettant d'améliorer les caractéristiques de fonctionnement d'une installation de chauffage du type à combustion submergée.The present invention relates to a method and an installation making it possible to improve the operating characteristics of a heating installation of the submerged combustion type.

Pour diverses applications, notamment de chauffage industriel, de chauffage de piscines et autres, on utilise parfois des installations utilisant des brûleurs à combustion submergée.For various applications, in particular industrial heating, swimming pool heating and others, installations using submerged combustion burners are sometimes used.

L'intérêt de telles installations est que l'on récupère, du fait du barbotage des gaz de combustion dans l'eau à chauffer, la plus grande partie de la chaleur latente de condensation des fumées. Ceci permet d'obtenir des rendements calculés sur le pouvoir calorifique inférieur (PCI) supérieur à 100% et fréquemment de l'ordre de 105%.The advantage of such installations is that, due to the bubbling of the combustion gases in the water to be heated, most of the latent heat of condensation of the fumes is recovered. This makes it possible to obtain yields calculated on the lower calorific value (PCI) greater than 100% and frequently of the order of 105%.

Cette technique séduisante présente cependant un certain nombre de difficultés inhérentes au principe même de la combustion qui s'effectue en milieu submergé. L'installation doit utiliser une arrivée de combustible (gaz ou fuel par exemple), une arrivée d'air comburant pressurisé par un ventilateur ou analogue, un dispositif d'allumage automatique à bougie ou analogue et un programmateur qui commandera successivement et automatiquement aux moments opportuns l'arrivée de combustible, l'allumage des brûleurs et l'arrêt d'alimentation de combustible lorsque la température de fonctionnement désirée aura été atteinte. Les brûleurs fonctionnant dans une chambre de combustion close, submergée,il est nécessaire pour des questions de sécurité et afin d'éviter tout risque d'explosion de réaliser avant allumage et après extinction des brûleurs respectivement un pré-balayage et un post-balayage à l'air de la chambre. Ces cycles sont pris en charge par le programmateur.This attractive technique however presents a certain number of difficulties inherent in the very principle of combustion which takes place in a submerged environment. The installation must use a fuel supply (gas or fuel for example), a supply of combustion air pressurized by a fan or the like, an automatic spark-ignition device or the like and a programmer which will control successively and automatically at times the fuel supply, the ignition of the burners and the fuel supply stop when the desired operating temperature has been reached. The burners operating in a closed, submerged combustion chamber, it is necessary for safety reasons and in order to avoid any risk of explosion to carry out before ignition and after extinction of the burners respectively a pre-sweep and a post-sweep with the air of the room. These cycles are taken care of by the programmer.

Cependant, la chambre de combustion ayant une inertie thermique relativement importante, et pouvant être portée lors de la combustion à des températures voisines de 1000°C, il apparaît des difficultés entre chaque cycle de fonctionnement par suite de remontées de l'eau dans la chambre de combustion encore chaude après post-balayage, conduisant a aes contraintes thermiques importantes de la chambre pouvant engendrer des fissures et des remontées de vapeur et d'air humide dans toute l'installation pouvant perturber le bon fonctionnement des organes électriques notamment d'allumage.However, the combustion chamber having a relatively high thermal inertia, and being able to be brought during combustion to temperatures close to 1000 ° C., difficulties appear between each operating cycle as a result of rising water in the combustion chamber still hot after post-sweeping, leading to significant thermal constraints of the chamber, which can cause cracks and rising steam and humid air throughout the installation, which can disturb the proper functioning of the electrical components, in particular the ignition .

L'invention a pour objet d'éviter les inconvénients susmentionnés.The object of the invention is to avoid the abovementioned drawbacks.

A cet effet le procédé conforme à l'invention se carac- caractérise en ce qu'on maintient après arrêt commandé des brûleurs, la ventilation à l'air de l'installation au moins pendant un temps suffisamment long,par exemple de l'ordre de plusieurs minutes, pour assurer le refroidissement jusqu'à une température voisine ou inférieure à 100°.C des parois de la chambre de combustion. Ainsi, on évite radicalement le problème des contraintes dues à un refroidissement brutal par remontée d'eau dans la chambre de combustion et la production simultanée de vapeur d'eau néfaste au bon fonctionnement.To this end, the process according to the invention is characterized in that, after controlled burner shutdown, the air ventilation of the installation is maintained at least for a sufficiently long time, for example of the order several minutes, to cool down to a temperature close to or below 100 ° C of the walls of the combustion chamber. Thus, the problem of stresses due to sudden cooling by rising water in the combustion chamber and the simultaneous production of water vapor detrimental to proper operation is radically avoided.

Selon un mode de réalisation préféré, le procédé est simplement mis en oeuvre en commandant l'arrivée d'air comburant pressurisé indépendamment du programmateur, dès que l'installation est mise sous tension, par l'intermédiaire d'un relais à ouverture temporisée alimenté par le circuit de mise sous tension de l'installation et qui se ferme dès la mise en route de l'installation. Ainsi,la circulation d'air comburant sera maintenu en permanence dans l'installation, et lorsqu'on arrêtera l'installation, par exemple en fin de journée si le cycle d'utilisation est diurne, le relais à ouverture temporisé maintiendra dans l'installation la circulation d'air comburant suffisamment longtemps pour assurer le bon refroidissement de la chambre.According to a preferred embodiment, the method is simply implemented by controlling the supply of pressurized combustion air independently of the programmer, as soon as the installation is energized, by means of a timed opening relay supplied by the system energizing circuit and which closes as soon as the system is started up. Thus, the combustion air circulation will be maintained permanently in the installation, and when the installation is stopped, for example at the end of the day if the duty cycle is daytime, the time-delayed relay will maintain in the installation the combustion air circulation long enough to ensure proper cooling of the chamber.

Selon une autre caractéristique avantageuse de l'invention, l'installation comprend en outre sur le circuit de soufflage d'air comburant un circuit de dérivation qui souffle de l'air sur les bougies d'allumage ou analogues et qui est commandé par une électrovanne à partir d'un relais à fermeture temporisée mis sous tension par le programmateur à chaque début d'un cycle d'allumage. De cette façon, à la mise en route de chaque cycle d'allumage, et avant que l'allumage soit commandé par mise sous tension des bougies, de l'air sec comburant est soufflé sur les électrodes de la bougie, éliminant de ces électrodes toute trace d'humidité, assurant ainsi un démarrage sans problème du cycle.According to another advantageous characteristic of the invention, the installation further comprises, on the air blowing circuit for combustion, a bypass circuit which blows air on the spark plugs or the like and which is controlled by a solenoid valve. from a time-delayed relay energized by the programmer at the start of each ignition cycle. In this way, at the start of each ignition cycle, and before ignition is controlled by switching on the spark plugs, dry combustion air is blown on the spark plug electrodes, eliminating of these electrodes any trace of humidity, thus ensuring a trouble-free start of the cycle.

L'invention apparaîtra plus clairement à l'aide de description qui va suivre faite en référence aux dessins annexés dans lesquels :

  • - la figure 1 montre un schéma d'une installation classique à combustion submergée;
  • - la figure 2 montre un schéma de la même installation mais comportant les modifications objets de perfectionnements de l'invention.
The invention will appear more clearly with the aid of the description which follows, made with reference to the appended drawings in which:
  • - Figure 1 shows a diagram of a conventional submerged combustion installation;
  • - Figure 2 shows a diagram of the same installation but comprising the modifications subject to improvements of the invention.

On décrira tout d'abord une installation classique telle qu'elle se présente comme illustrée à la figure 1.Firstly, a conventional installation will be described as it appears as illustrated in FIG. 1.

L'installation comprend un brûleur 1, du type jet ou autre qui développe une flamme 2 verticale dirigée vers le bas dans un foyer 3 constituant la chambre de combustion dont la paroi est habituellement métallique constituée d'une ou plusieurs couches. Les produits ou gaz de la combustion s'échappent sous forme de bulles 4 par des trous 5 formés en bas de la chambre 3 directement dans le bain à chauffer 30, habituellement constitué par de l'eau contenue dans un récipient ou une enceinte convenable 31 et en dessous du niveau 15 du bain.The installation comprises a burner 1, of the jet or other type which develops a vertical flame 2 directed downwards in a hearth 3 constituting the combustion chamber whose wall is usually metallic made up of one or more layers. The products or gases of combustion escape in the form of bubbles 4 through holes 5 formed at the bottom of the chamber 3 directly in the bath to be heated 30, usually consisting of water contained in a suitable container or enclosure 31 and below level 15 of the bath.

Le cycle de fonctionnement (allumage et extinction) du brûleur est commandé par un programmateur 6 agréé devant répondre à des spécifications précises définies par les Pouvoirs Publics. Ce programmateur 6 donne des ordres au moteur 7 d'un ventilateur d'air comburant, vérifie la présence de la pression d'air convenable mesurée en 8 et de la pression de gaz convenable mesurée en 9 et envoie un ordre d'allumage par l'intermédiaire d'un transformateur haute tension 10 à une bougie d'allumage 11; le programmateur donne également des ordres aux électrovannes d'air 12 et de gaz 13 et vérifie la présence de la flamme par un organe de détection 14.The operating cycle (ignition and extinction) of the burner is controlled by an approved programmer 6 which must meet precise specifications defined by the Public Authorities. This programmer 6 gives orders to the motor 7 of a combustion air fan, checks the presence of the suitable air pressure measured in 8 and the suitable gas pressure measured in 9 and sends an ignition order by l 'through a high voltage transformer 10 to a spark plug 11; the programmer also gives orders to the air 12 and gas 13 solenoid valves and checks the presence of the flame by a detection member 14.

Au début du cycle, le programmateur procède à un pré-balayage de l'installation, c'est-à-dire au balayage par l'air uniquement de l'ensemble de la chambre de combustion 3, la pression de l'air devant être supérieure à la pression hydrostatique du liquide contenu dans le bain 30. Ce temps de pré-balayage est de l'ordre de la minute. Ensuite, si les pressions d'air et de gaz sont convenables, le programmateur 6 commande l'alimentation du transformateur d'allumage 10 et le brûleur s'allume.At the start of the cycle, the programmer pre-scans the installation, i.e. scans the entire combustion chamber 3 with air only, with the air pressure in front be greater than the hydrostatic pressure of the liquid contained in the bath 30. This pre-sweep time is of the order of a minute. Then, if the air and gas pressures are suitable, the programmer 6 controls the supply of the ignition transformer 10 and the burner ignites.

En fin de cycle, c'est-à-dire lorsque le bain 30 a atteint la température désirée, le programmateur 6 ferme l'électrovanne 13 du combustible et procède à un post-balayage, c'est-à-dire à une post-ventilation de l'équipement en continuant à envoyer de l'air par le ventilateur 7 dans l'ensemble de l'installation pendant un temps de l'ordre de 30 secondes.At the end of the cycle, that is to say when the bath 30 has reached the desired temperature, the programmer 6 closes the solenoid valve 13 of the fuel and performs a post-scan, that is to say a post ventilation of the equipment while continuing to send air through the fan 7 throughout the installation for a time of the order of 30 seconds.

Cette façon de faire, si elle est conforme aux spécifications en vigueur dans la plupart des pays et valable pour des chaudières, présente pour l'utilisation spécifique du chauffage en direct par des produits de combustion les inconvénients suivants :

  • - lors de l'arrêt de l'installation, le liquide du bain 30 remonte trop rapidement à l'intérieur de la chambre 3. Le métal porté sur sa face interne à une température de l'ordre de 1000°C est brutalement refroidi, ce qui crée des contraintes thermiques importantes et détériore ses qualités pouvant entraîner des fissures.De plus, cela provoque une vaporisation du liquide créant une tension de vapeur qui chemine jusqu'aux électrovannes d'air 12 et de gaz 13 et aux membranes de prise de pression 8 et 9. Cette pression de vapeur risque également d'atteindre le ventilateur 7. La vapeur qui est à une température supérieure à 100°C détériore ainsi les organes précédemment cités qui sont la plupart du temps conçus pour des températures de fonctionnement ne dépassant pas 50°C et qui s'accommodent mal d'une humidité importante.
  • - lors de la régulation de l'installation, c'est-à-dire lors de l'arrêt momentané entre deux cycles de fonctionnement de l'installation lorsque le bain n'a pas besoin de chaleur (l'installation fonctionnant par tout ou rien) les problèmes sont identiques, puisque le programmateur procède au post-balayage comme indiqué ci-dessus et attend un ordre deIa sonde de température pour commander un autre démarrage. Autrement dit, entre deux cycles de fonctionnement successifs, on retrouve les inconvénients susmentionnés existant à la suite de la mise à l'arrêt de l'installation.
  • - l'allumage est incertain, car l'installation étant à l'arrêt définitif en fin de travail, une atmosphère humide règne dans l'enceinte 16 de la partie supérieure de la chambre 3, et les électrodes 17 de la bougie 11 sont humides. L'installation risque de ne pas s'allumer, créant ainsi une gêne auprès de l'utilisateur. Cet inconvénient existe également lors du fonctionnement normal entre deux cycles.
This procedure, if it complies with the specifications in force in most countries and valid for boilers, has the following drawbacks for the specific use of direct heating by combustion products:
  • when the installation is stopped, the liquid from the bath 30 rises too quickly inside the chamber 3. The metal brought to its internal face at a temperature of the order of 1000 ° C. is suddenly cooled, This creates significant thermal stresses and deteriorates its qualities which can cause cracks. In addition, this causes vaporization of the liquid creating a vapor pressure which travels to the air 12 and gas 13 solenoid valves and the intake membranes. pressure 8 and 9. This vapor pressure also risks reaching fan 7. The vapor which is at a temperature above 100 ° C. thus deteriorates the above-mentioned members which are most of the time designed for operating temperatures not exceeding not 50 ° C and which do not adapt well to high humidity.
  • - during the regulation of the installation, that is to say during the temporary stop between two operating cycles of the installation when the bath does not need heat (the installation functioning by all or nothing) the problems are identical, since the programmer carries out the post-scan as indicated above and waits for an order from the temperature probe to order another start. In other words, between two successive operating cycles, there are the aforementioned drawbacks existing at the following the shutdown of the installation.
  • - the ignition is uncertain, because the installation being at the final stop at the end of work, a humid atmosphere prevails in the enclosure 16 of the upper part of the chamber 3, and the electrodes 17 of the spark plug 11 are wet . The installation may not light up, creating discomfort for the user. This drawback also exists during normal operation between two cycles.

On se reportera maintenant à la figure 2 montrant l'installation modifiée conforme à l'invention et dans laquelle les mêmes repères ont été utilisés pour repérer les pièces identiques.Reference will now be made to FIG. 2 showing the modified installation in accordance with the invention and in which the same references have been used to identify identical parts.

Conformément à l'invention, la mise en route du moteur 7 du ventilateur n'est plus commandée par la jonction 27 provenant du programmateur 6, mais directement par une jonction 21 reliée à la ligne d'alimentation en courant de l'installation, elle-même commandée par un relais 19 dont le contact 18 est temporisé à l'ouverture, le relais 19 étant lui-même alimenté à travers le bouton marche/arrêt 20 de l'installation.According to the invention, the starting of the fan motor 7 is no longer controlled by the junction 27 coming from the programmer 6, but directly by a junction 21 connected to the current supply line of the installation, it even controlled by a relay 19, the contact 18 of which is timed on opening, the relay 19 being itself supplied through the on / off button 20 of the installation.

Il apparaît ainsi que tant que le bouton marche/ arrêt 20 sera fermé, le moteur 7 du ventilateur sera alimenté assurant la mise sous pression d'air de l'installation, et évitant par conséquent radicalement toute remontée de liquide du bain 30 dans la chambre de combustion 3.It thus appears that as long as the on / off button 20 is closed, the fan motor 7 will be supplied ensuring the air pressure of the installation, and consequently radically avoiding any rise of liquid from the bath 30 into the chamber combustion 3.

En outre, lors de l'arrêt de l'installation, par exemple en fin de journée, c'est-à-dire à l'ouverture du bouton marche/arrêt 20, le moteur 7 restera alimenté par la ligne 21 le temps de la temporisation du contact 18 et assurera le refroidissement nécessaire de la paroi de la chambre de combustion 3. La durée de temporisation sera suffisante pour assurer que la température de la paroi interne de la chambre 3 ne sera pas sensiblement supérieure à 100°C; avec des installations de puissance classique, cette durée de temporisation pourra être de l'ordre de 8 à 10 mn environ. Ainsi, on assure la marche permanente du ventilateur 7 lorsque l'installation est sous tension, et le post-balayage en fin de travail pendant un temps suffisant, tout en utilisant un programmateur agréé assurant des temps de sécurité imposés par les spécifications et ne nécessitant aucune modification importante de l'installation..In addition, when the installation is stopped, for example at the end of the day, that is to say when the on / off button 20 is opened, the motor 7 will remain supplied by the line 21 for the time of the time delay of the contact 18 and will ensure the necessary cooling of the wall of the combustion chamber 3. The time delay will be sufficient to ensure that the temperature of the internal wall of the chamber 3 will not be substantially greater than 100 ° C; with conventional power installations, this time delay may be of the order of approximately 8 to 10 minutes. Thus, permanent operation of the fan 7 is ensured when the installation is energized, and post-scanning at the end of work for a sufficient time, while using a approved programmer ensuring safety times imposed by the specifications and requiring no significant modification of the installation.

En ce qui concerne la sûreté de l'allumage, et selon une autre caractéristique de l'invention, on soufflera les électrodes 17 de la bougie 11 à l'air à travers un tube 22alimenté par l'intermédiaire d'une électrovanne 23 en dérivation sur le circuit de soufflage d'air principal 29 du ventilateur.With regard to ignition safety, and according to another characteristic of the invention, the electrodes 17 of the spark plug 11 will be blown into the air through a tube 22 supplied by means of a bypass solenoid valve 23 on the main air supply circuit 29 of the fan.

Dans l'exemple illustré de commande, l'électrovanne 23 est alimentée à partir de la jonction 27 di programmateur qui servait initialement à commander la mise en route du ventilateur en pré et post-balayages. L'alimentation de l'électrovanne 23 se fait en outre à travers le contact 24 d'un relais 25 alimenté par la jonction 27 et temporisé à la fermeture. La temporisation pourra être de 30 secondes environ, correspondant au temps de pré-balayage. Par cette disposition, les électrodes 17 de la bougie 11 sont soufflées et débarrassées de leur humidité avant l'alimentation du transformateur 10, et ce à chaque cycle d'allumage. De cette manière, on évite non seulement à l'origine la production de vapeur d'eau dans la partie supérieure 16 de la chambre de combustion, mais on débarrasse également efficacement les électrodes 17 de toute trace d'humidité au début de chaque cycle d'allumage.In the illustrated control example, the solenoid valve 23 is supplied from the programmer junction 27 which was initially used to control the start-up of the fan in pre and post-sweeps. The supply of the solenoid valve 23 is also done through the contact 24 of a relay 25 supplied by the junction 27 and delayed on closing. The time delay may be approximately 30 seconds, corresponding to the pre-sweep time. By this arrangement, the electrodes 17 of the spark plug 11 are blown and rid of their moisture before the transformer 10 is supplied, and this at each ignition cycle. In this way, not only is the origin of the production of water vapor in the upper part 16 of the combustion chamber avoided, but the electrodes 17 are also effectively rid of all traces of moisture at the start of each cycle d 'ignition.

Claims (5)

1. Procédé améliorant les caractéristiques de fonctionnement d'une intallation de chauffage du type utilisant des brûleurs (1) à combustion submergée, caractérisé en ce qu'en vue d'éviter des contraintes thermiques néfastes de la chambre de combustion (3) et des retours de vapeur vers différents organes de l'installation, on maintient, après arrêt commandé des brûleurs (1), la ventilation (7) à l'air de l'installation, au moins pendant un temps suffisamment long, par exemple de l'ordre de plusieurs minutes, pour assurer le refroidissement jusqu'à une température voisine ou inférieure à 100°C des parois de la chambre de combustion (3).1. A method improving the operating characteristics of a heating installation of the type using burners (1) with submerged combustion, characterized in that in order to avoid harmful thermal stresses of the combustion chamber (3) and returns of steam to different parts of the installation, ventilation (7) is maintained, after controlled shutdown of the burners (1), with air from the installation, at least for a sufficiently long time, for example from the order of several minutes, to cool the walls of the combustion chamber (3) to a temperature close to or below 100 ° C. 2. Procédé selon la revendication 1, caractérisé en ce qu'on maintient en permanence l'installation sous ventilation (7) d'air tant que l'arrêt général de l'installation,par exemple en fin de journée, n'est pas commandé.2. Method according to claim 1, characterized in that the installation is permanently maintained under ventilation (7) of air as long as the general shutdown of the installation, for example at the end of the day, is not ordered. 3. Installation pour la mise en oeuvre du procédé selon la revendication 1 ou la revendication 2, du type comportant au moins un brûleur (1) à chambre de combustion (3) submergée, une arrivée de combustible, une arrivée d'air comburant pressurisé par un ventilateur (7) ou analogue, un dispositif d'allumage automatique à boùgies (11) ou analogue, un programmateur (6) commandant successivement aux moments opportuns l'arrivée de combustible, l'allumage et l'arrêt d'alimentation de combustible, ladite installation étant caractérisée en ce que l'arrivée d'air comburant pressurisé par le ventilateur (7) est commandée indépendamment du programmateur (6)dès que l'installation est mise sous tension par l'intermédiaire d'un relais (19) à ouverture temporisée alimenté par le circuit de mise sous tension (21) de l'installation et qui se ferme dès la mise en route de l'installation.3. Installation for implementing the method according to claim 1 or claim 2, of the type comprising at least one burner (1) with submerged combustion chamber (3), a fuel inlet, a pressurized combustion air inlet by a fan (7) or the like, an automatic ignition device with cylinders (11) or the like, a programmer (6) controlling successively at the appropriate times the arrival of fuel, the ignition and the supply stop of fuel, said installation being characterized in that the supply of combustion air pressurized by the fan (7) is controlled independently of the programmer (6) as soon as the installation is energized by means of a relay (19 ) with timed opening supplied by the system's power-up circuit (21) and which closes when the system is started. 4. Installation selon la revendication 3, caractérisée en ce que la temporisation dudit relais (19) à l'ouverture est de plusieurs minutes, par exemple une dizaine de minutes.4. Installation according to claim 3, characterized in that the time delay of said relay (19) upon opening is several minutes, for example ten minutes. 5. Installation selon la revèndication 3 ou la revendication 4, caractérisée en ce qu'elle comprend sur le soufflage d'air comburant (29) un circuit de dérivation (22) qui souffle de l'air sur les bougies (11) d'allumage ou analogues et qui est commandé par une électrovanne (23) à partir d'un relais (25) à fermeture temporisée mis sous tension par le programmateur (6) à chaque début d'un cycle d'allumage.5. Installation according to claim 3 or claim 4, characterized in that it comprises on the combustion air blowing (29) a bypass circuit (22) which blows air on the spark plugs (11) ignition or ana logues and which is controlled by a solenoid valve (23) from a time-closed relay (25) energized by the programmer (6) at each start of an ignition cycle.
EP19830401863 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion Expired EP0135639B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8383401863T DE3379592D1 (en) 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion
EP19830401863 EP0135639B1 (en) 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19830401863 EP0135639B1 (en) 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion

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EP0135639A1 true EP0135639A1 (en) 1985-04-03
EP0135639B1 EP0135639B1 (en) 1989-04-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109990273A (en) * 2019-04-30 2019-07-09 无锡特莱姆气体设备有限公司 Submerged combustion gasifier burner and its combustion control system
CN111189230A (en) * 2018-11-15 2020-05-22 青岛经济技术开发区海尔热水器有限公司 Automatic control method of gas water heater and gas water heater

Citations (7)

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Publication number Priority date Publication date Assignee Title
US2118479A (en) * 1938-03-24 1938-05-24 Submerged Comb Company Of Amer Submerged combustion burner
US2375840A (en) * 1941-12-23 1945-05-15 Elematic Corp Liquid heating apparatus
US2767784A (en) * 1951-03-22 1956-10-23 Ind Systems Inc Fuel burner
FR1439336A (en) * 1965-05-03 1966-05-20 Mere Ind Heating or combustion devices
FR1503119A (en) * 1965-12-02 1967-11-24 Hanrez Sa J Atel Submerged combustion heater
FR2195326A5 (en) * 1972-08-04 1974-03-01 Aquitaine Petrole
US4122557A (en) * 1977-07-29 1978-10-31 Harris Frank N Incinerator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2118479A (en) * 1938-03-24 1938-05-24 Submerged Comb Company Of Amer Submerged combustion burner
US2375840A (en) * 1941-12-23 1945-05-15 Elematic Corp Liquid heating apparatus
US2767784A (en) * 1951-03-22 1956-10-23 Ind Systems Inc Fuel burner
FR1439336A (en) * 1965-05-03 1966-05-20 Mere Ind Heating or combustion devices
FR1503119A (en) * 1965-12-02 1967-11-24 Hanrez Sa J Atel Submerged combustion heater
FR2195326A5 (en) * 1972-08-04 1974-03-01 Aquitaine Petrole
US4122557A (en) * 1977-07-29 1978-10-31 Harris Frank N Incinerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111189230A (en) * 2018-11-15 2020-05-22 青岛经济技术开发区海尔热水器有限公司 Automatic control method of gas water heater and gas water heater
CN109990273A (en) * 2019-04-30 2019-07-09 无锡特莱姆气体设备有限公司 Submerged combustion gasifier burner and its combustion control system

Also Published As

Publication number Publication date
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EP0135639B1 (en) 1989-04-12

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