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EP2045543A1 - Boiler with smoke pipes - Google Patents

Boiler with smoke pipes Download PDF

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Publication number
EP2045543A1
EP2045543A1 EP08164888A EP08164888A EP2045543A1 EP 2045543 A1 EP2045543 A1 EP 2045543A1 EP 08164888 A EP08164888 A EP 08164888A EP 08164888 A EP08164888 A EP 08164888A EP 2045543 A1 EP2045543 A1 EP 2045543A1
Authority
EP
European Patent Office
Prior art keywords
boiler
nozzle
fluid
plate
combustion chamber
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
EP08164888A
Other languages
German (de)
French (fr)
Other versions
EP2045543B1 (en
Inventor
Jérôme Renard
Aymeric Dutrop
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.)
Guillot Industrie SAS
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Guillot Industrie SAS
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Publication date
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Publication of EP2045543A1 publication Critical patent/EP2045543A1/en
Application granted granted Critical
Publication of EP2045543B1 publication Critical patent/EP2045543B1/en
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Classifications

    • 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
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/287—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber
    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/10—Safety or protection arrangements; Arrangements for preventing malfunction for preventing overheating, e.g. heat shields

Definitions

  • the invention relates to a flue gas boiler.
  • Such a boiler is used in particular to achieve collective heating or produce hot water.
  • a flue gas boiler comprises a combustion chamber and a tank containing heat transfer fluid, the combustion chamber being equipped with a tubular plate forming a support for the flue tubes, the tube plate being disposed substantially horizontally.
  • the boiler is generally connected to a network, either heating or hot water, the fluid stored in the reservoir being renewed by a fluid flow through the aforementioned network.
  • thermostat to regulate, as needed, the operation of the boiler.
  • the use of a thermostat is not very effective for collective installations for which the needs vary greatly, and generally ensure both the production of high temperature water, intended for hot water, and the production of water. water at low temperature, for heating.
  • the tubular plate being essentially horizontal, the fluid circulation velocities, generated by natural convection, are very low. It follows a low efficiency cooling this part in the combustion chamber, and therefore overheating thereof.
  • the overheating phenomenon In addition to the risk of boiling, the overheating phenomenon generates an excessive and harmful local thermal expansion for the life of the boiler, as well as a risk of scaling of the tube plate.
  • the layer of limestone thus formed being also insulating, the aforementioned phenomenon amplifies and accelerates the degradation of the boiler.
  • Such a solution has a significant cost and can cause a decrease in the performance of the boiler, because the permanent circulation of water at high temperature prevents, for example, the recovery of the latent heat of condensation of the combustion gases.
  • the invention aims to remedy these drawbacks, by proposing a boiler with flue tubes to avoid the aforementioned overheating phenomena, while maintaining an optimal performance of the boiler.
  • the invention relates to a boiler of the aforementioned type, characterized in that the boiler comprises a recycling line equipped with a pump, comprising an inlet for withdrawing fluid contained in the tank and an outlet forming a nozzle allowing to inject the collected fluid under the tube plate.
  • the recycling line makes it possible to limit the occurrence of an overheating phenomenon, without the need to heat an additional volume of fluid.
  • the boiler comprises a stirring element which, traversed by the fluid coming from the nozzle and disposed between the nozzle and the tubular plate, is intended to stir the injected fluid.
  • the stirring element makes it possible to increase the exchanges between the tube plate and the fluid coming from the nozzle, so as to reduce the temperature of the tube plate as effectively as possible.
  • the stirring element comprises, in the direction of flow of the fluid injected by the nozzle, a convergent portion and a divergent portion.
  • the stirring element therefore also makes it possible to increase the speed of the fluid flowing through it, which further promotes the cooling of the tube plate.
  • the brewing element is of tubular general shape.
  • the nozzle is disposed near the tube plate, preferably at a distance of between 5 and 15 times the nozzle passage diameter, preferably between 80 and 150 mm.
  • the tubular plate has the general shape of a disc, the central zone of the plate not being connected to a smoke tube, the nozzle being disposed under the central zone of the tube plate.
  • the boiler has a generally elongated shape, the boiler being arranged vertically, the combustion chamber being formed in the upper part of the boiler, the tank having an upper part surrounding the combustion chamber and a lower part disposed below it, the tubular plate forming a bottom wall of the combustion chamber, the tubes extending vertically downwardly from the tubular plate.
  • Figure 1 is schematically in longitudinal section, the boiler being connected to a heating network.
  • the boiler 1 has a generally cylindrical shape of axis A.
  • the boiler 1 is oriented vertically, the latter comprising, in the upper part, a combustion chamber 2 surrounded by a reservoir 3.
  • the reservoir 3 is generally cylindrical in shape and has an upper annular portion 4 surrounding the combustion chamber 2 and a lower portion 5, disposed under the combustion chamber 2.
  • the tank 3 stores water as heat transfer fluid.
  • the combustion chamber 2 comprises a cylindrical side wall 6 and a bottom wall formed by a tubular plate 7.
  • the combustion chamber 2 is closed by a door 8 provided with a refractory insulator and equipped with a burner 9.
  • Flue tubes 10 are mounted on the tube plate 7 and welded thereto at one end, the tubes 10 extending vertically downward, as is known per se.
  • the flue gases from the combustion chamber 2 are fed into the flue tubes 10 and exchange heat with the fluid contained in the tank 3, via the side walls of the flues. 10.
  • the fumes are thus gradually cooled and condense at the bottom of the tubes 10.
  • the tubular plate 7 has a general disk shape, the central zone 11 of the tubular plate 7 being devoid of tube 10.
  • the reservoir 3 further comprises an inlet and a fluid outlet 12, 13, connected to a heating network. More specifically, the fluid outlet 13 is disposed in the upper part 4 and is connected to an inlet of a three-way valve 14, an outlet of the three-way valve being connected to a branch line 15 connected to the fluid inlet 12 disposed in the lower part 5 of the tank 3, another outlet of the three-way valve 14 being connected to the heating network itself, via a pump 16.
  • the heating network is composed of a plurality of receivers , such as radiators 17. The fluid passing through the heating network is returned to the tank 3 via the fluid inlet 12.
  • the boiler 1 is equipped with a recycling line 18 equipped with a pump 19, comprising an inlet 20 disposed in the upper part 4 of the tank 3 and for sampling fluid at high temperature (of the order of 80 ° C) contained in the upper part 4, and an outlet forming a nozzle 21 for injecting under the tubular plate 7 fluid taken.
  • the nozzle 21 is oriented along the axis A, under the central zone 11 of the tube plate 7, close to the latter, preferably at a distance between 5 and 15 times the diameter of the passage of the nozzle.
  • the passage diameter that is to say the inside diameter of the nozzle, is of the order of 13 mm, the nozzle being located at a distance of between 80 and 150 mm from the tube plate.
  • the boiler according to the invention further comprises a stirring element 22 traversed by the fluid coming from the nozzle 21 and disposed between the nozzle 21 and the tubular plate 7.
  • the stirring element 22 is generally tubular in shape and has in the fluid flow direction injected by the nozzle, a convergent portion 23 and then a diverging portion 24.
  • Such a boiler 1 makes it possible to maintain good stratification of the water temperature layers, which increases the condensation performance of the fumes at the bottom of the tubes 10, despite the fact that the water injected under the tube plate 7 is of the order of 80 ° C.
  • the narrowing section at the nozzle 21 increases the water injection speeds. Associated with the element of brewing 22, this speed makes it possible to drive the volume of surrounding water by an induction effect, and to increase by about 150% the flow rate of water reaching the tube plate, so as to avoid the aforementioned overheating phenomenon .
  • the invention is not limited to the sole embodiment of this boiler, described above as an example, but it embraces all variants.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

L'invention concerne une chaudière (1) à tubes de fumées (10) comportant une chambre de combustion (2) ainsi qu'un réservoir (3) contenant du fluide caloporteur, la chambre de combustion (2) étant équipée d'une plaque tubulaire (7) formant support pour les tubes de fumées (10), la plaque tubulaire (7) étant disposée sensiblement horizontalement. La chaudière (1) comporte une conduite de recyclage (18) équipée d'une pompe (19), comprenant une entrée (20) permettant de prélever du fluide contenu dans le réservoir (3) et une sortie formant une buse (21) permettant d'injecter sous la plaque tubulaire (7) le fluide prélevé.The invention relates to a boiler (1) with flue tubes (10) comprising a combustion chamber (2) and a tank (3) containing heat transfer fluid, the combustion chamber (2) being equipped with a plate tubular (7) forming a support for the flue tubes (10), the tubular plate (7) being arranged substantially horizontally. The boiler (1) comprises a recycle line (18) equipped with a pump (19), comprising an inlet (20) for withdrawing fluid contained in the reservoir (3) and an outlet forming a nozzle (21) allowing to inject under the tubular plate (7) the fluid taken.

Description

L'invention concerne une chaudière à tubes de fumées.The invention relates to a flue gas boiler.

Une telle chaudière est notamment utilisée afin de réaliser un chauffage collectif ou de produire de l'eau chaude sanitaire.Such a boiler is used in particular to achieve collective heating or produce hot water.

De manière classique, une chaudière à tubes de fumées comporte une chambre de combustion ainsi qu'un réservoir contenant du fluide caloporteur, la chambre de combustion étant équipée d'une plaque tubulaire formant support pour les tubes de fumées, la plaque tubulaire étant disposée sensiblement horizontalement.In a conventional manner, a flue gas boiler comprises a combustion chamber and a tank containing heat transfer fluid, the combustion chamber being equipped with a tubular plate forming a support for the flue tubes, the tube plate being disposed substantially horizontally.

La chaudière est généralement reliée à un réseau, soit de chauffage, soit d'eau chaude sanitaire, le fluide stocké dans le réservoir étant renouvelé par une circulation de fluide au travers du réseau précité.The boiler is generally connected to a network, either heating or hot water, the fluid stored in the reservoir being renewed by a fluid flow through the aforementioned network.

Une telle circulation de fluide est donc dépendante des besoins et ajustée classiquement par une vanne trois voies.Such fluid flow is therefore dependent on the needs and conventionally adjusted by a three-way valve.

Lorsque les besoins sont réduits, la circulation de fluide à l'intérieur du réservoir est alors faible, ce qui peut engendrer des phénomènes de surchauffe.When the needs are reduced, the circulation of fluid inside the tank is then low, which can cause overheating phenomena.

Afin de limiter un tel phénomène, il est connu d'utiliser un thermostat permettant de réguler, en fonction des besoins, le fonctionnement de la chaudière. Toutefois, l'utilisation d'un thermostat est peu efficace pour des installations collectives pour lesquelles les besoins varient fortement, et assurent généralement à la fois la production d'eau à haute température, destinée à l'eau chaude sanitaire, et la production d'eau à basse température, destinée au chauffage.To limit such a phenomenon, it is known to use a thermostat to regulate, as needed, the operation of the boiler. However, the use of a thermostat is not very effective for collective installations for which the needs vary greatly, and generally ensure both the production of high temperature water, intended for hot water, and the production of water. water at low temperature, for heating.

La plaque tubulaire étant essentiellement horizontale, les vitesses de circulation du fluide, générées par convection naturelle, sont très faibles. Il s'en suit une faible efficacité du refroidissement de cette partie dans la chambre de combustion, et donc une surchauffe de celle-ci.The tubular plate being essentially horizontal, the fluid circulation velocities, generated by natural convection, are very low. It follows a low efficiency cooling this part in the combustion chamber, and therefore overheating thereof.

Outre un risque d'ébullition, le phénomène de surchauffe engendre une dilatation thermique locale excessive et néfaste pour la durée de vie de la chaudière, ainsi qu'un risque d'entartrage de la plaque tubulaire. La couche de calcaire ainsi formée étant également isolante, le phénomène précité s'amplifie et accélère la dégradation de la chaudière.In addition to the risk of boiling, the overheating phenomenon generates an excessive and harmful local thermal expansion for the life of the boiler, as well as a risk of scaling of the tube plate. The layer of limestone thus formed being also insulating, the aforementioned phenomenon amplifies and accelerates the degradation of the boiler.

Afin de pallier à ces inconvénients, il est connu de relier le réservoir à un volume de fluide additionnel, plus précisément à une bouteille de découplage hydraulique, par l'intermédiaire d'une pompe supplémentaire.In order to overcome these drawbacks, it is known to connect the reservoir to an additional fluid volume, more specifically to a hydraulic decoupling bottle, via an additional pump.

Une telle solution présente un coût important et peut engendrer une diminution des performances de la chaudière, car la circulation permanente d'eau à température élevée empêche, par exemple, la récupération de la chaleur latente de condensation des gaz de combustion.Such a solution has a significant cost and can cause a decrease in the performance of the boiler, because the permanent circulation of water at high temperature prevents, for example, the recovery of the latent heat of condensation of the combustion gases.

L'invention vise à remédier à ces inconvénients, en proposant une chaudière à tubes de fumées permettant d'éviter les phénomènes de surchauffe précités, tout en conservant un rendement optimal de la chaudière.The invention aims to remedy these drawbacks, by proposing a boiler with flue tubes to avoid the aforementioned overheating phenomena, while maintaining an optimal performance of the boiler.

A cet effet, l'invention concerne une chaudière du type précité, caractérisée en ce que la chaudière comporte une conduite de recyclage équipée d'une pompe, comprenant une entrée permettant de prélever du fluide contenu dans le réservoir et une sortie formant une buse permettant d'injecter sous la plaque tubulaire le fluide prélevé.For this purpose, the invention relates to a boiler of the aforementioned type, characterized in that the boiler comprises a recycling line equipped with a pump, comprising an inlet for withdrawing fluid contained in the tank and an outlet forming a nozzle allowing to inject the collected fluid under the tube plate.

De cette manière, la conduite de recyclage permet de limiter l'apparition d'un phénomène de surchauffe, sans nécessiter de chauffer un volume de fluide additionnel.In this way, the recycling line makes it possible to limit the occurrence of an overheating phenomenon, without the need to heat an additional volume of fluid.

En outre, dans le cas où le fluide en contact avec la plaque tubulaire est tout de même porté à ébullition, le gaz stocké sous cette plaque tubulaire est éjecté par le flux de fluide provenant de la buse, empêchant ainsi la formation d'une couche isolante.In addition, in the case where the fluid in contact with the tubular plate is still brought to a boil, the gas stored under this tube plate is ejected by the fluid flow from the nozzle, thus preventing the formation of a layer insulating.

Selon une caractéristique de l'invention, la chaudière comporte un élément de brassage qui, traversé par le fluide issu de la buse et disposé entre la buse et la plaque tubulaire, est destiné à brasser le fluide injecté.According to a characteristic of the invention, the boiler comprises a stirring element which, traversed by the fluid coming from the nozzle and disposed between the nozzle and the tubular plate, is intended to stir the injected fluid.

L'élément de brassage permet d'augmenter les échanges entre la plaque tubulaire et le fluide issu de la buse, de manière à réduire le plus efficacement possible la température de la plaque tubulaire.The stirring element makes it possible to increase the exchanges between the tube plate and the fluid coming from the nozzle, so as to reduce the temperature of the tube plate as effectively as possible.

Avantageusement, l'élément de brassage comporte, dans le sens d'écoulement du fluide injecté par la buse, une portion convergente puis une portion divergente.Advantageously, the stirring element comprises, in the direction of flow of the fluid injected by the nozzle, a convergent portion and a divergent portion.

L'élément de brassage permet donc également d'augmenter la vitesse du fluide qui le traverse, ce qui favorise d'autant le refroidissement de la plaque tubulaire.The stirring element therefore also makes it possible to increase the speed of the fluid flowing through it, which further promotes the cooling of the tube plate.

Selon une possibilité de l'invention, l'élément de brassage est de forme générale tubulaire.According to a possibility of the invention, the brewing element is of tubular general shape.

Préférentiellement, la buse est disposée à proximité de la plaque tubulaire, préférentiellement à une distance comprise entre 5 et 15 fois le diamètre de passage de la buse, préférentiellement, entre 80 et 150 mm.Preferably, the nozzle is disposed near the tube plate, preferably at a distance of between 5 and 15 times the nozzle passage diameter, preferably between 80 and 150 mm.

Selon une caractéristique de l'invention, la plaque tubulaire présente la forme générale d'un disque, la zone centrale de la plaque n'étant pas raccordée à un tube de fumée, la buse étant disposée sous la zone centrale de la plaque tubulaire.According to a characteristic of the invention, the tubular plate has the general shape of a disc, the central zone of the plate not being connected to a smoke tube, the nozzle being disposed under the central zone of the tube plate.

Avantageusement, la chaudière présente une forme générale allongée, la chaudière étant disposée verticalement, la chambre de combustion étant ménagée en partie supérieure de la chaudière, le réservoir comportant une partie supérieure entourant la chambre de combustion et une partie inférieure disposée sous celle-ci, la plaque tubulaire formant une paroi de fond de la chambre de combustion, les tubes s'étendant verticalement vers le bas à partir de la plaque tubulaire.Advantageously, the boiler has a generally elongated shape, the boiler being arranged vertically, the combustion chamber being formed in the upper part of the boiler, the tank having an upper part surrounding the combustion chamber and a lower part disposed below it, the tubular plate forming a bottom wall of the combustion chamber, the tubes extending vertically downwardly from the tubular plate.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme de réalisation de cette chaudière.In any case, the invention will be better understood from the description which follows, with reference to the attached schematic drawing showing, by way of example, an embodiment of this boiler.

Figure 1 en est vue schématique en coupe longitudinale, la chaudière étant raccordée à un réseau de chauffage. Figure 1 is schematically in longitudinal section, the boiler being connected to a heating network.

Comme cela est représenté à la figure 1, la chaudière 1 présente une forme générale cylindrique d'axe A. La chaudière 1 est orientée verticalement, celle-ci comportant, en partie supérieure, une chambre de combustion 2 entourée par un réservoir 3.As shown in figure 1 , the boiler 1 has a generally cylindrical shape of axis A. The boiler 1 is oriented vertically, the latter comprising, in the upper part, a combustion chamber 2 surrounded by a reservoir 3.

Plus précisément, le réservoir 3 est de forme générale cylindrique et comporte une partie annulaire supérieure 4 entourant la chambre de combustion 2 et une partie inférieure 5, disposée sous la chambre de combustion 2.More specifically, the reservoir 3 is generally cylindrical in shape and has an upper annular portion 4 surrounding the combustion chamber 2 and a lower portion 5, disposed under the combustion chamber 2.

Le réservoir 3 permet de stocker de l'eau en tant que fluide caloporteur.The tank 3 stores water as heat transfer fluid.

La chambre de combustion 2 comporte une paroi latérale cylindrique 6 et une paroi de fond formée par une plaque tubulaire 7. La chambre de combustion 2 est refermée par une porte 8 munie d'un isolant réfractaire et équipée d'un brûleur 9.The combustion chamber 2 comprises a cylindrical side wall 6 and a bottom wall formed by a tubular plate 7. The combustion chamber 2 is closed by a door 8 provided with a refractory insulator and equipped with a burner 9.

Des tubes de fumées 10 sont montés sur la plaque tubulaire 7 et soudés à celle-ci au niveau d'une extrémité, les tubes 10 s'étendant verticalement vers le bas, comme cela est connu en soi. Ainsi, en fonctionnement, les fumées issues de la chambre de combustion 2 sont amenés dans les tubes de fumées 10 et échange de la chaleur avec le fluide contenu dans le réservoir 3, par l'intermédiaire des parois latérales des tubes 10. Les fumées se refroidissent ainsi progressivement et se condensent en partie basses des tubes 10.Flue tubes 10 are mounted on the tube plate 7 and welded thereto at one end, the tubes 10 extending vertically downward, as is known per se. Thus, in operation, the flue gases from the combustion chamber 2 are fed into the flue tubes 10 and exchange heat with the fluid contained in the tank 3, via the side walls of the flues. 10. The fumes are thus gradually cooled and condense at the bottom of the tubes 10.

La plaque tubulaire 7 présente une forme générale de disque, la zone centrale 11 de la plaque tubulaire 7 étant dépourvue de tube 10.The tubular plate 7 has a general disk shape, the central zone 11 of the tubular plate 7 being devoid of tube 10.

Le réservoir 3 comporte en outre une entrée et une sortie de fluide 12, 13, raccordées à un réseau de chauffage. Plus précisément, la sortie de fluide 13 est disposée en partie supérieure 4 et est raccordée à une entrée d'une vanne trois voies 14, une sortie de la vanne trois voies étant raccordée à une conduite de dérivation 15 reliée à l'entrée de fluide 12 disposée en partie basse 5 du réservoir 3, une autre sortie de la vanne trois voies 14 étant raccordée au réseau de chauffage proprement dit, par l'intermédiaire d'une pompe 16. Le réseau de chauffage est composé d'une pluralité de récepteurs, tels que des radiateurs 17. Le fluide traversant le réseau de chauffage est retourné au réservoir 3 par l'intermédiaire de l'entrée de fluide 12.The reservoir 3 further comprises an inlet and a fluid outlet 12, 13, connected to a heating network. More specifically, the fluid outlet 13 is disposed in the upper part 4 and is connected to an inlet of a three-way valve 14, an outlet of the three-way valve being connected to a branch line 15 connected to the fluid inlet 12 disposed in the lower part 5 of the tank 3, another outlet of the three-way valve 14 being connected to the heating network itself, via a pump 16. The heating network is composed of a plurality of receivers , such as radiators 17. The fluid passing through the heating network is returned to the tank 3 via the fluid inlet 12.

De plus, la chaudière 1 est équipée d'une conduite de recyclage 18 équipée d'une pompe 19, comprenant une entrée 20 disposée en partie supérieure 4 du réservoir 3 et permettant de prélever du fluide à haute température (de l'ordre de 80°C) contenu dans la partie supérieure 4, et une sortie formant une buse 21 permettant d'injecter sous la plaque tubulaire 7 le fluide prélevé. Plus précisément, la buse 21 est orientée selon l'axe A, sous la zone centrale 11 de la plaque tubulaire 7, à proximité de celle-ci, préférentiellement à une distance entre 5 et 15 fois le diamètre de passage de la buse. Préférentiellement, le diamètre de passage, c'est-à-dire le diamètre intérieur de la buse, est de l'ordre de 13 mm, la buse étant située à une distance comprise entre 80 et 150 mm de la plaque tubulaire.In addition, the boiler 1 is equipped with a recycling line 18 equipped with a pump 19, comprising an inlet 20 disposed in the upper part 4 of the tank 3 and for sampling fluid at high temperature (of the order of 80 ° C) contained in the upper part 4, and an outlet forming a nozzle 21 for injecting under the tubular plate 7 fluid taken. More specifically, the nozzle 21 is oriented along the axis A, under the central zone 11 of the tube plate 7, close to the latter, preferably at a distance between 5 and 15 times the diameter of the passage of the nozzle. Preferably, the passage diameter, that is to say the inside diameter of the nozzle, is of the order of 13 mm, the nozzle being located at a distance of between 80 and 150 mm from the tube plate.

La chaudière selon l'invention comporte en outre un élément de brassage 22, traversé par le fluide issu de la buse 21 et disposé entre la buse 21 et la plaque tubulaire 7. L'élément de brassage 22 est de forme générale tubulaire et présente, dans le sens d'écoulement du fluide injecté par la buse, une portion convergente 23 puis une portion divergente 24.The boiler according to the invention further comprises a stirring element 22 traversed by the fluid coming from the nozzle 21 and disposed between the nozzle 21 and the tubular plate 7. The stirring element 22 is generally tubular in shape and has in the fluid flow direction injected by the nozzle, a convergent portion 23 and then a diverging portion 24.

Une telle chaudière 1 permet de conserver une bonne stratification des couches de température de l'eau, ce qui augmente les performances à la condensation des fumées en partie basse des tubes 10, malgré le fait que l'eau injectée sous la plaque tubulaire 7 soit de l'ordre de 80°C.Such a boiler 1 makes it possible to maintain good stratification of the water temperature layers, which increases the condensation performance of the fumes at the bottom of the tubes 10, despite the fact that the water injected under the tube plate 7 is of the order of 80 ° C.

De plus, le rétrécissement de section au niveau de la buse 21 permet d'augmenter les vitesses d'injection de l'eau. Associé à l'élément de brassage 22, cette vitesse permet d'entraîner le volume d'eau environnant par un effet d'induction, et d'augmenter d'environ 150% le débit d'eau atteignant la plaque tubulaire, de manière à éviter le phénomène de surchauffe précité.In addition, the narrowing section at the nozzle 21 increases the water injection speeds. Associated with the element of brewing 22, this speed makes it possible to drive the volume of surrounding water by an induction effect, and to increase by about 150% the flow rate of water reaching the tube plate, so as to avoid the aforementioned overheating phenomenon .

Comme il va de soi, l'invention ne se limite pas à la seule forme de réalisation de cette chaudière, décrite ci-dessus à titre d'exemple, mais elle embrasse au contraire toutes les variantes.As goes without saying, the invention is not limited to the sole embodiment of this boiler, described above as an example, but it embraces all variants.

Claims (7)

Chaudière (1) à tubes de fumées (10) comportant une chambre de combustion (2) ainsi qu'un réservoir (3) contenant du fluide caloporteur, la chambre de combustion (2) étant équipée d'une plaque tubulaire (7) formant support pour les tubes de fumées (10), la plaque tubulaire (7) étant disposée sensiblement horizontalement, caractérisée en ce que la chaudière (1) comporte une conduite de recyclage (18) équipée d'une pompe (19), comprenant une entrée (20) permettant de prélever du fluide contenu dans le réservoir (3) et une sortie formant une buse (21) permettant d'injecter sous la plaque tubulaire (7) le fluide prélevé.Boiler (1) with flue tubes (10) having a combustion chamber (2) and a reservoir (3) containing heat transfer fluid, the combustion chamber (2) being equipped with a tubular plate (7) forming support for the flue tubes (10), the tube plate (7) being arranged substantially horizontally, characterized in that the boiler (1) comprises a recycle line (18) equipped with a pump (19), comprising an inlet (20) for withdrawing fluid contained in the reservoir (3) and an outlet forming a nozzle (21) for injecting under the tubular plate (7) the sampled fluid. Chaudière (1) selon la revendication 1, caractérisée en ce qu'elle comporte un élément de brassage (22) qui, traversé par le fluide issu de la buse (21) et disposé entre la buse (21) et la plaque tubulaire (7), est destiné à brasser le fluide injecté.Boiler (1) according to claim 1, characterized in that it comprises a stirring element (22) through which the fluid coming from the nozzle (21) passes between the nozzle (21) and the tube plate (7). ), is intended to stir the injected fluid. Chaudière (1) selon la revendication 1, caractérisée en ce que l'élément de brassage (22) comporte, dans le sens d'écoulement du fluide injecté par la buse (21), une portion convergente (23) puis une portion divergente (24).Boiler (1) according to claim 1, characterized in that the stirring element (22) comprises, in the direction of flow of the fluid injected by the nozzle (21), a convergent portion (23) and then a divergent portion ( 24). Chaudière (1) selon la revendication 1, caractérisée en ce que l'élément de brassage (22) est de forme générale tubulaire.Boiler (1) according to claim 1, characterized in that the stirring element (22) is of generally tubular shape. Chaudière (1) selon l'une des revendications 1 à 4, caractérisée en ce que la buse (21) est disposée à proximité de la plaque tubulaire (7), préférentiellement à une distance comprise entre 5 et 15 fois le diamètre de passage de la buse, préférentiellement, entre 80 et 150 mm.Boiler (1) according to one of claims 1 to 4, characterized in that the nozzle (21) is arranged near the tube plate (7), preferably at a distance of between 5 and 15 times the diameter of the passage of the nozzle, preferably between 80 and 150 mm. Chaudière (1) selon l'un des revendications 1 à 5, caractérisé en ce que la plaque tubulaire (7) présente la forme générale d'un disque, la zone centrale (11) de la plaque (7) n'étant pas raccordée à un tube de fumée (10), la buse (21) étant disposée sous la zone centrale (11) de la plaque tubulaire (7).Boiler (1) according to one of claims 1 to 5, characterized in that the tubular plate (7) has the general shape of a disk, the central zone (11) of the plate (7) not being connected a tube of smoke (10), the nozzle (21) being disposed under the central zone (11) of the tube plate (7). Chaudière (1) selon l'une des revendication 1 à 6, caractérisée en ce qu'elle présente une forme générale allongée, la chaudière (1) étant disposée verticalement, la chambre de combustion (2) étant ménagée en partie supérieure de la chaudière (1), le réservoir (3) comportant une partie supérieure (4) entourant la chambre de combustion (2) et une partie inférieure (5) disposée sous celle-ci, la plaque tubulaire (7) formant une paroi de fond de la chambre de combustion (2), les tubes (10) s'étendant verticalement vers le bas à partir de la plaque tubulaire (7).Boiler (1) according to one of claims 1 to 6, characterized in that it has a generally elongate shape, the boiler (1) being arranged vertically, the combustion chamber (2) being formed in the upper part of the boiler (1), the tank (3) having an upper part (4) surrounding the combustion chamber (2) and a lower part (5) disposed below it, the tubular plate (7) forming a bottom wall of the combustion chamber (2), the tubes (10) extending vertically downwards from the tube plate (7).
EP08164888.3A 2007-10-05 2008-09-23 Boiler with smoke pipes Active EP2045543B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0707001A FR2922002B1 (en) 2007-10-05 2007-10-05 BOILER WITH TUBES OF SMOKE

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EP2045543A1 true EP2045543A1 (en) 2009-04-08
EP2045543B1 EP2045543B1 (en) 2017-07-19

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ES (1) ES2638120T3 (en)
FR (1) FR2922002B1 (en)

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CN114294834A (en) * 2021-11-23 2022-04-08 北京华远意通热力科技股份有限公司 Regulating system for supplying domestic hot water at constant temperature

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN116294751B (en) * 2023-03-27 2023-10-03 华能国际电力股份有限公司德州电厂 Boiler with waste heat recovery mechanism

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Publication number Priority date Publication date Assignee Title
WO2006111317A1 (en) 2005-04-18 2006-10-26 Unical Ag S.P.A. Heat exchange apparatus, particularly fire tube condensing boiler
WO2006135145A1 (en) * 2005-06-14 2006-12-21 Kiturami Boiler Co., Ltd. Discrete double heat exchange type hot water boiler

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Publication number Priority date Publication date Assignee Title
WO2006111317A1 (en) 2005-04-18 2006-10-26 Unical Ag S.P.A. Heat exchange apparatus, particularly fire tube condensing boiler
WO2006135145A1 (en) * 2005-06-14 2006-12-21 Kiturami Boiler Co., Ltd. Discrete double heat exchange type hot water boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114294834A (en) * 2021-11-23 2022-04-08 北京华远意通热力科技股份有限公司 Regulating system for supplying domestic hot water at constant temperature

Also Published As

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ES2638120T3 (en) 2017-10-18
EP2045543B1 (en) 2017-07-19
FR2922002A1 (en) 2009-04-10
FR2922002B1 (en) 2011-03-18

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