EP0068958A1 - Steam generator with a dynamic discharge system - Google Patents

Steam generator with a dynamic discharge system Download PDF

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Publication number
EP0068958A1
EP0068958A1 EP82401064A EP82401064A EP0068958A1 EP 0068958 A1 EP0068958 A1 EP 0068958A1 EP 82401064 A EP82401064 A EP 82401064A EP 82401064 A EP82401064 A EP 82401064A EP 0068958 A1 EP0068958 A1 EP 0068958A1
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EP
European Patent Office
Prior art keywords
steam
water
enclosure
steam generator
drying structure
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Granted
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EP82401064A
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German (de)
French (fr)
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EP0068958B1 (en
Inventor
Jean Edmond Chaix
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements
    • F22B37/268—Steam-separating arrangements specially adapted for steam generators of nuclear power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements

Definitions

  • the present invention relates to a steam generator more particularly intended for use in pressurized water nuclear reactors and provided with a dynamic purge device facilitating the evacuation of the water separated from the steam in the dryer of the generator.
  • FIG. 1 represents a steam generator of the type currently used in pressurized water reactors.
  • the generator bearing the general reference 1, is constituted by a sealed cylindrical enclosure 2 surrounding a set of U-shaped tubes referenced 4 in which the primary liquid circulates.
  • the tubes 4 are fixed by their lower part to a tube plate 6 and communicate on the one hand with an intake chamber 8 through which the primary fluid arrives. hot and an evacuation chamber 10 allowing the cooled primary liquid to return to the reactor.
  • a cylindrical envelope 12 surrounds all of the tubes 4 and defines with the internal wall of the enclosure 2 an annular passage 14 for the circulation of the secondary liquid.
  • the cylindrical envelope 12 has at its upper part a cover 18 in which are formed several passages such as 20, each being provided with a device for separation by centrifugation of the water entrained with the steam. This, leaving the device 22 still contains a certain amount of water which must be removed before the steam reaches the turbine of the alternator.
  • the upper part of the generator is provided with a drying structure such as 24 and generally comprising passages provided with baffles on which the drops of water are deposited and fall back into the generator through discharge conduits such as 26.
  • the generator represented in FIG. 1 comprises two superimposed drying structures 24 and 25 communicating with the lower part of the generator by discharge conduits 26 and 27 respectively. It is also possible to provide a central manifold 28 whose action completes that of the discharge conduits 26 and 27. It can also be seen in FIG. 1 that the free surface of the secondary liquid outside the envelope 12 reaches the level of the centrifuge device 22 and that the free ends of the conduits 26 and 27 and of the manifold 28 are below this surface. Since the drying structures 24 and 25 cause a pressure drop in the steam circuit, there is established in the evacuation conduits a height of water called “guard height" such that the level difference between the free surface of the liquid in the evacuation conduits and inside the enclosure 2 corresponds approximately to the pressure drop across the structures 24 and 25.
  • guard height a height of water
  • the object of the present invention is precisely a steam generator in which this drawback is eliminated by a device which makes it unnecessary to maintain a headroom in the evacuation pipes.
  • the steam generator object of the invention comprising inside a sealed enclosure of vertical axis a plurality of U-shaped tubes in which circulates a primary liquid and on the wall external of which a secondary liquid flows, a cylindrical envelope surrounding said tubes and delimiting with the internal wall of said enclosure an annular passage in communication at its lower part with the internal space of said envelope, the latter being closed at its part upper by a cover itself surmounted by at least one device for separating steam by centrifugation, a steam drying assembly at the upper part of said enclosure, this assembly comprising at least one steam drying structure surrounding the axis of said enclosure, each drying structure communicating at its lower part with at least one discharge conduit for the evacuation of water separated from the vapor, is c characterized in that each discharge conduit is in communication with a dynamic purge device capable of creating a vacuum in order to suck up the water collected in said drying structure.
  • the device capable of creating a vacuum comprises a pipe, one end of which is connected to the secondary liquid supply circuit and the other end of which is in the form of a injector similar to that of a water pump, is located inside a conduit used to evacuate the water collected in the discharge structure.
  • each discharge conduit opens into an annular conduit surrounding the axis of the enclosure, this annular conduit communicating with at least one evacuation conduit itself provided with a device dynamic purge capable of creating a depression.
  • FIG. 2 shows the upper part of a steam generator similar to that of Figure 1 where we recognize the secondary water inlet 16 and the cylindrical envelope 12 closed at its upper part by a cover 18. On the latter are arranged several cylindrical passages such as 20 provided with a device 22 for separating by centrifugation the water entrained by steam. The water is discharged through a passage formed between the cylinder 20 and a sleeve 23 surrounding the latter while the vapor, which still contains a few water droplets, enters the upper part of the enclosure and passes through drying structures. In the example shown here there are two superimposed drying structures 24 and 25 having a shape of revolution around the axis of the enclosure 2.
  • the structures 24 and 25 comprise a plurality of vertical passages provided with numerous baffles on which '' deposit water droplets entrained by steam. The latter is then discharged through an orifice 30 formed in the upper part of the generator while the water droplets fall to the lower part of the dryers 24 and 25 and pass through the discharge conduits 26 and 27.
  • the discharge conduits such as 26 and 27 all open into an annular conduit 32 surrounding the axis of the enclosure. Under the annular pipe 32, and in communication therewith, there is a discharge pipe 34 which is provided with a device 36 capable of creating a vacuum inside the pipe 34 and therefore of the others. conduits 26, 27 and 32.
  • the device 36 firstly comprises a conduit 38 connected to the secondary water supply circuit and emerging inside the conduit 34 by an injector or nozzle 39 similar to that of a water pump.
  • the part of the pipe 34 surrounding the injector 39 has a convergent shape, so that the water injected by the nozzle 39 creates a vacuum and sucks the water droplets contained both in the pipe 34 and in the annular conduit 32 or the discharge conduits 26 and 27.
  • the suction in the evacuation conduits it is no longer necessary to maintain a guard height in these and one can reduce the total height of the generator.
  • the device according to the invention has numerous advantages, the main one of which is being able to reduce the height of the generator by eliminating the guard height to be maintained in the discharge piping.
  • the possible reduction of the total height can be of the order of a meter, which results in an appreciable saving in mate rials and therefore a lowering of the cost of installation.
  • the fact of having a permanent suction ensures faster and more efficient evacuation of the water droplets separated from the vapor in the dryers 24 and 25.

Abstract

La présente invention a pour objet un générateur de vapeur muni d'un dispositif de purge dynamique. Ce générateur comporte à sa partie supérieure au moins une structure de séchage (24) servant à retenir l'eau entraînée avec la vapeur et communiquant à sa partie inférieure avec au moins un conduit de décharge (26) pour l'évacuation de l'eau, chaque conduit (26) étant en communication avec un dispositif de purge dynamique (36) capable de créer une dépression afin d'aspirer l'eau contenue dans la structure de séchage (24). Application aux réacteurs nucléaires à eau pressurisée.The present invention relates to a steam generator provided with a dynamic purge device. This generator has at its upper part at least one drying structure (24) serving to retain the water entrained with the steam and communicating at its lower part with at least one discharge conduit (26) for the evacuation of the water. , each conduit (26) being in communication with a dynamic purge device (36) capable of creating a vacuum in order to suck up the water contained in the drying structure (24). Application to nuclear pressurized water reactors.

Description

La présente invention est relative à un générateur de vapeur plus particulièrement destiné à être utilisé dans les réacteurs nucléaires à eau pressurisée et muni d'un dispositif de purge dynamique facilitant l'évacuation de l'eau séparée de la vapeur dans le sécheur du générateur.The present invention relates to a steam generator more particularly intended for use in pressurized water nuclear reactors and provided with a dynamic purge device facilitating the evacuation of the water separated from the steam in the dryer of the generator.

La figure 1 représente un générateur de vapeur du type utilisé actuellement dans les réacteurs à eau pressurisée. Le générateur, portant la référence générale 1, est constitué par une enceinte étanche cylindrique 2 entourant un ensemble de tubes en U référencés 4 dans lesquels circule le liquide primaire. Les tubes 4 sont fixés par leur partie inférieure à une plaque à tubes 6 et communiquent d'une part avec une chambre d'admission 8 par laquelle arrive le fluide primaire. chaud et une chambre d'évacuation 10 permettant au liquide primaire refroidi de retourner dans le réacteur. Une enveloppe cylindrique 12 entoure l'ensemble des tubes 4 et délimite avec la paroi interne de l'enceinte 2 un passage annulaire 14 pour la circulation du liquide secondaire. Celui-ci arrive l" dans le générateur par une canalisation 16 puis descend dans le passage annulaire 14 jusqu'à la plaque à tubes 6, pénètre à travers un passage ménagé entre la plaque 6 et le bord inférieur de l'enveloppe 12, et remonte le long des tubes 4 où il se vaporise au contact du fluide primaire chaud. L'enveloppe cylindrique 12 comporte à sa partie supérieure un couvercle 18 dans lequel sont ménagés plusieurs passages tels que 20, chacun étant muni d'un dispositif de séparation par centrifugation de l'eau entraînée avec la vapeur. Celle-ci, au sortir du dispositif 22 contient encore une certaine quantité d'eau qu'il faut éliminer avant que la vapeur n'arrive sur la turbine de l'alternateur. Pour cela, la partie supérieure du générateur est munie d'une structure de séchage telle que 24 et comportant généralement des passages munis de chicanes sur lesquelles les gouttes d'eau se déposent et retombent dans le générateur à travers des conduits de décharge tels que 26. Le générateur représenté sur la figure 1 comporte deux structures de séchage superposées 24 et 25 communiquant avec la partie basse du générateur par des conduits de décharge 26 et 27 respectivement. On peut encore prévoir un collecteur central 28 dont l'action complète celle des conduits de décharge 26-et 27. On voit encore sur la figure 1 que la surface libre du liquide secondaire à l'extérieur de l'enveloppe 12 atteint le niveau du dispositif de centrifugation 22 et que les extrémités libres des conduits 26 et 27 et du collecteur 28 se trouvent en-dessous de cette surface. Etant donné que les structures de séchage 24 et 25 provoquent une perte de charge dans le circuit de la vapeur, il s'établit dans les conduits d'évacuation une hauteur d'eau dite "hauteur de garde" telle que la différence de niveau entre la surface libre du liquide dans les conduits d'évacuation et à l'intérieur de l'enceinte 2 corresponde approximativement à la perte de charge à travers les structures 24 et 25. D'autre part, pour un bon fonctionnement du système, il est indispensable que le niveau d'eau dans les conduits de décharge soit inférieur au niveau de la partie inférieure des structures de séchage 24 et 25. La nécessité de maintenir une hauteur de garde minimale dans les conduits d'évacuation entraîne donc un encombrement important en hauteur des générateurs de vapeur.FIG. 1 represents a steam generator of the type currently used in pressurized water reactors. The generator, bearing the general reference 1, is constituted by a sealed cylindrical enclosure 2 surrounding a set of U-shaped tubes referenced 4 in which the primary liquid circulates. The tubes 4 are fixed by their lower part to a tube plate 6 and communicate on the one hand with an intake chamber 8 through which the primary fluid arrives. hot and an evacuation chamber 10 allowing the cooled primary liquid to return to the reactor. A cylindrical envelope 12 surrounds all of the tubes 4 and defines with the internal wall of the enclosure 2 an annular passage 14 for the circulation of the secondary liquid. This arrives there in the generator by a pipe 16 then descends in the annular passage 14 to the tube plate 6, enters through a passage formed between the plate 6 and the lower edge of the envelope 12, and goes up along the tubes 4 where it vaporizes on contact with the hot primary fluid The cylindrical envelope 12 has at its upper part a cover 18 in which are formed several passages such as 20, each being provided with a device for separation by centrifugation of the water entrained with the steam. This, leaving the device 22 still contains a certain amount of water which must be removed before the steam reaches the turbine of the alternator. the upper part of the generator is provided with a drying structure such as 24 and generally comprising passages provided with baffles on which the drops of water are deposited and fall back into the generator through discharge conduits such as 26. The generator represented in FIG. 1 comprises two superimposed drying structures 24 and 25 communicating with the lower part of the generator by discharge conduits 26 and 27 respectively. It is also possible to provide a central manifold 28 whose action completes that of the discharge conduits 26 and 27. It can also be seen in FIG. 1 that the free surface of the secondary liquid outside the envelope 12 reaches the level of the centrifuge device 22 and that the free ends of the conduits 26 and 27 and of the manifold 28 are below this surface. Since the drying structures 24 and 25 cause a pressure drop in the steam circuit, there is established in the evacuation conduits a height of water called "guard height" such that the level difference between the free surface of the liquid in the evacuation conduits and inside the enclosure 2 corresponds approximately to the pressure drop across the structures 24 and 25. On the other hand, for a good functioning of the system, it is essential that the water level in the discharge conduits is lower than the level of the lower part of the drying structures 24 and 25. The need to maintain a minimum guard height in the evacuation conduits therefore results in a significant bulk in height steam generators.

La présente invention a justement pour objet un générateur de vapeur dans lequel cet inconvénient est éliminé grâce à un dispositif qui rend inutile le maintien d'une hauteur de garde dans les tuyaux d'évacuation.The object of the present invention is precisely a steam generator in which this drawback is eliminated by a device which makes it unnecessary to maintain a headroom in the evacuation pipes.

Selon la principale caractéristique du générateur de vapeur objet de l'invention, celui-ci, du type comportant à l'intérieur d'une enceinte étanche d'axe vertical une pluralité de tubes en U dans lesquels circule un liquide primaire et sur la paroi externe desquels s'écoule un liquide secondaire, une enveloppe cylindrique entourant lesdits tubes et délimitant avec la paroi interne de ladite enceinte un passage annulaire en communication à sa partie inférieure avec l'espace interne de ladite enveloppe, celle-ci étant obturée à sa partie supérieure par un couvercle lui-même surmonté d'au moins un dispositif de séparation de la vapeur par centrifugation, un ensemble de séchage de la vapeur à la partie supérieure de ladite enceinte, cet ensemble comportant au moins une structure de séchage de la vapeur entourant l'axe de ladite enceinte, chaque structure de séchage communiquant à sa partie inférieure avec au moins un conduit de décharge pour l'évacuation de l'eau séparée de la vapeur, se caractérise en ce que chaque conduit de décharge est en communication avec un dispositif de purge dynamique capable de créer une dépression afin d'aspirer l'eau recueillie dans ladite structure de séchage.According to the main characteristic of the steam generator object of the invention, it, of the type comprising inside a sealed enclosure of vertical axis a plurality of U-shaped tubes in which circulates a primary liquid and on the wall external of which a secondary liquid flows, a cylindrical envelope surrounding said tubes and delimiting with the internal wall of said enclosure an annular passage in communication at its lower part with the internal space of said envelope, the latter being closed at its part upper by a cover itself surmounted by at least one device for separating steam by centrifugation, a steam drying assembly at the upper part of said enclosure, this assembly comprising at least one steam drying structure surrounding the axis of said enclosure, each drying structure communicating at its lower part with at least one discharge conduit for the evacuation of water separated from the vapor, is c characterized in that each discharge conduit is in communication with a dynamic purge device capable of creating a vacuum in order to suck up the water collected in said drying structure.

Selon une autre caractéristique du générateur de vapeur selon l'invention, le dispositif capable de créer une dépression comporte une conduite dont une extrémité est branchée sur le circuit d'alimentation en liquide secondaire et dont l'autre extrémité, ayant la forme d'un injecteur semblable à celui d'une trompe à eau, est située à l'intérieur d'un conduit servant à l'évacuation de l'eau recueillie dans la structure de décharge.According to another characteristic of the steam generator according to the invention, the device capable of creating a vacuum comprises a pipe, one end of which is connected to the secondary liquid supply circuit and the other end of which is in the form of a injector similar to that of a water pump, is located inside a conduit used to evacuate the water collected in the discharge structure.

Selon un mode de réalisation préféré de l'invention, chaque conduit de décharge débouche dans un conduit annulaire entourant l'axe de l'enceinte, ce conduit annulaire communiquant avec au moins un conduit d'évacuation lui-même muni d'un dispositif de purge dynamique capable de créer une dépression.According to a preferred embodiment of the invention, each discharge conduit opens into an annular conduit surrounding the axis of the enclosure, this annular conduit communicating with at least one evacuation conduit itself provided with a device dynamic purge capable of creating a depression.

L'invention apparaîtra mieux à la lecture de la description qui va suivre donnée à titre d'exemple purement illustratif et nullement limitatif en référence aux dessins annexés dans lesquels :

  • -'la figure 1, déjà décrite, est une vue schématique en coupe verticale d'un générateur de vapeur conforme à l'art antérieur, et
  • - la figure 2 est une vue agrandie, en coupe verticale, de la partie supérieure d'un générateur de vapeur selon l'invention comportant un dispositif de purge dynamique.
The invention will appear better on reading the description which follows given by way of purely illustrative and in no way limitative example with reference to the appended drawings in which:
  • FIG. 1, already described, is a schematic view in vertical section of a steam generator according to the prior art, and
  • - Figure 2 is an enlarged view, in vertical section, of the upper part of a steam generator according to the invention comprising a dynamic purge device.

La figure 2 représente la partie supérieure d'un générateur de vapeur semblable à celui de la figure 1 où l'on reconnaît l'arrivée d'eau secondaire 16 et l'enveloppe cylindrique 12 fermée à sa partie supérieure par un couvercle 18. Sur ce dernier sont disposés plusieurs passages cylindriques tels que 20 munis d'un dispositif 22 servant à séparer par centrifugation l'eau.entraînée par la vapeur. L'eau est évacuée à travers un passage ménagé entre le cylindre 20 et un manchon 23 entourant celui-ci tandis que la vapeur, qui contient encore quelques gouttelettes d'eau, pénètre dans la partie supérieure de l'enceinte et passe à travers des structures de séchage. Dans l'exemple représenté ici il y a deux structures de séchage superposées 24 et 25 ayant une forme de révolution autour de l'axe de l'enceinte 2. Les structures 24 et 25 comportent une pluralité de passages verticaux munis de nombreuses chicanes sur lesquelles' se déposent les gouttelettes d'eau entraînées par la vapeur. Cette dernière est ensuite évacuée par un orifice 30 ménagé à la partie supérieure du générateur tandis que les gouttelettes d'eau retombent à la partie inférieure des sécheurs 24 et 25 et passent dans les conduits de décharge 26 et 27. Dans l'exemple représenté sur la figure 2, les conduits de décharge tels que 26 et 27 débouchent tous dans une conduite annulaire 32 entourant l'axe de l'enceinte. Sous la conduite annulaire 32, et en communication avec celle-ci, se trouve un conduit d'évacuation 34 lequel est muni d'un dispo-si- tif 36 capable de créer une dépression à l'intérieur du conduit 34 et donc des autres conduits 26, 27 et 32. Dans l'exemple représenté ici, le dispositif 36 comporte tout d'abord une conduite 38 reliée au circuit d'alimentation en eau secondaire et débouchant à l'intérieur de la conduite 34 par un injecteur ou buse 39 semblable à celui d'une trompe à eau. A cet endroit, la partie de la conduite 34 entourant l'injecteur 39 présente une forme convergente, de sorte que l'eau injectée par la buse 39 crée une dépression et aspire les gouttelettes d'eau contenues aussi bien dans la conduite 34 que dans la conduite annulaire 32 ou les conduits de décharge 26 et 27. Ainsi, du fait de l'aspiration dans les conduits d'évacuation, il n'est plus nécessaire de maintenir une hauteur de garde dans ceux-ci et l'on peut diminuer la hauteur totale du générateur.2 shows the upper part of a steam generator similar to that of Figure 1 where we recognize the secondary water inlet 16 and the cylindrical envelope 12 closed at its upper part by a cover 18. On the latter are arranged several cylindrical passages such as 20 provided with a device 22 for separating by centrifugation the water entrained by steam. The water is discharged through a passage formed between the cylinder 20 and a sleeve 23 surrounding the latter while the vapor, which still contains a few water droplets, enters the upper part of the enclosure and passes through drying structures. In the example shown here there are two superimposed drying structures 24 and 25 having a shape of revolution around the axis of the enclosure 2. The structures 24 and 25 comprise a plurality of vertical passages provided with numerous baffles on which '' deposit water droplets entrained by steam. The latter is then discharged through an orifice 30 formed in the upper part of the generator while the water droplets fall to the lower part of the dryers 24 and 25 and pass through the discharge conduits 26 and 27. In the example shown on Figure 2, the discharge conduits such as 26 and 27 all open into an annular conduit 32 surrounding the axis of the enclosure. Under the annular pipe 32, and in communication therewith, there is a discharge pipe 34 which is provided with a device 36 capable of creating a vacuum inside the pipe 34 and therefore of the others. conduits 26, 27 and 32. In the example shown here, the device 36 firstly comprises a conduit 38 connected to the secondary water supply circuit and emerging inside the conduit 34 by an injector or nozzle 39 similar to that of a water pump. At this point, the part of the pipe 34 surrounding the injector 39 has a convergent shape, so that the water injected by the nozzle 39 creates a vacuum and sucks the water droplets contained both in the pipe 34 and in the annular conduit 32 or the discharge conduits 26 and 27. Thus, due to the suction in the evacuation conduits, it is no longer necessary to maintain a guard height in these and one can reduce the total height of the generator.

On voit donc que le dispositif selon l'invention présente de nombreux avantages dont le principal est de pouvoir réduire la hauteur du générateur par suppression de la hauteur de garde à maintenir dans la tuyauterie d'évacuation. La diminution possible de la hauteur totale peut être de l'ordre du mètre, ce qui entraîne une appréciable économie de matériaux et donc un abaissement du coût de l'installation. D'autre part, le fait d'avoir une aspiration permanente assure une évacuation plus rapide et plus efficace des gouttelettes d'eau séparées de la vapeur dans les sécheurs 24 et 25.It can therefore be seen that the device according to the invention has numerous advantages, the main one of which is being able to reduce the height of the generator by eliminating the guard height to be maintained in the discharge piping. The possible reduction of the total height can be of the order of a meter, which results in an appreciable saving in mate rials and therefore a lowering of the cost of installation. On the other hand, the fact of having a permanent suction ensures faster and more efficient evacuation of the water droplets separated from the vapor in the dryers 24 and 25.

Il est bien entendu que l'invention ne se limite pas au seul exemple de réalisation qui vient d'être décrit mais qu'on peut envisager des variantes sans sortir pour autant du cadre de l'invention. C'est ainsi qu'on peut envisager d'installer plusieurs conduits de décharge tels que 26 munis chacun d'un dispositif de purge ou bien, comme dans l'exemple représenté.ici, de relier plusieurs conduits de décharge à un seul dispositif de purge.It is understood that the invention is not limited to the single embodiment which has just been described, but that variants can be envisaged without thereby departing from the scope of the invention. Thus it is possible to envisage installing several discharge conduits such as 26 each provided with a purge device or else, as in the example shown here, connecting several discharge conduits to a single device purge.

Claims (3)

1. Générateur de vapeur du type comportant à l'intérieur d'une enceinte étanche (2) d'axe vertical une pluralité de tubes en U (4) dans lesquels circule un liquide primaire et sur la paroi externe desquels s'écoule un liquide secondaire, une enveloppe cylindrique (12) entourant lesdits tubes (4) et délimitant avec la paroi interne de ladite enceinte (2) un passage annulaire (14) en communication à sa partie inférieure avec l'espace interne de ladite enveloppe (12), celle-ci étant obturée à sa partie supérieure par un couvercle (18) lui-même surmonté par au moins un dispositif (22) de séparation de la vapeur par centrifugation, au moins un ensemble de séchage de la vapeur à la partie supérieure de ladite enceinte (2), cet ensemble comportant au moins une structure de séchage de la vapeur (24) entourant l'axe de ladite enceinte, chaque structure de séchage (24) communiquant à sa partie inférieure avec au moins un conduit de décharge (26) pour l'évacuation de l'eau séparée de la vapeur, caractérisé en ce que chaque conduit de décharge (26) est en communication avec un dispositif de purge dynamique (36) capable de créer une dépression afin d'aspirer l'eau recueillie dans ladite structure de séchage (24).1. Steam generator of the type comprising inside a sealed enclosure (2) with a vertical axis a plurality of U-shaped tubes (4) in which a primary liquid circulates and on the external wall of which a liquid flows secondary, a cylindrical envelope (12) surrounding said tubes (4) and delimiting with the internal wall of said enclosure (2) an annular passage (14) in communication at its lower part with the internal space of said envelope (12), the latter being closed at its upper part by a cover (18) itself surmounted by at least one device (22) for separating the steam by centrifugation, at least one steam drying assembly at the upper part of the said enclosure (2), this assembly comprising at least one vapor drying structure (24) surrounding the axis of said enclosure, each drying structure (24) communicating at its lower part with at least one discharge duct (26) for the removal of water separated from the steam, c characterized in that each discharge conduit (26) is in communication with a dynamic purge device (36) capable of creating a vacuum in order to suck up the water collected in said drying structure (24). 2. Générateur de vapeur selon la revendication 1, caractérisé en ce que le dispositif de purge dynamique (36) capable de créer une dépression comprend une conduite (38) dont une extrémité est branchée sur le circuit d'alimentation en liquide secondaire et dont l'autre extrémité, ayant la forme d'un injecteur (39) semblable à celui d'une trompe d'eau, est situé à l'intérieur d'un conduit (34) servant à évacuer l'eau recueillie dans la structure de séchage (24).2. Steam generator according to claim 1, characterized in that the dynamic purge device (36) capable of creating a vacuum comprises a pipe (38) one end of which is connected to the secondary liquid supply circuit and of which l 'other end, having the shape of an injector (39) similar to that of a water pump, is located inside a conduit (34) for discharging the water collected in the drying structure (24). 3. Générateur de vapeur selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que chaque conduit de décharge (26, 27) débouche dans un collecteur annulaire (32) communiquant avec au moins un conduit d'évacuation (34) muni d'un dispositif de purge dynamique (36) capable de créer une dépression.3. Steam generator according to any one of claims 1 or 2, characterized in that each discharge conduit (26, 27) opens into an annular collector (32) communicating with at least one discharge conduit (34) provided a dynamic purge device (36) capable of creating a vacuum.
EP82401064A 1981-06-16 1982-06-11 Steam generator with a dynamic discharge system Expired EP0068958B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111833 1981-06-16
FR8111833A FR2507742A1 (en) 1981-06-16 1981-06-16 STEAM GENERATOR HAVING A DYNAMIC PURGE DEVICE

Publications (2)

Publication Number Publication Date
EP0068958A1 true EP0068958A1 (en) 1983-01-05
EP0068958B1 EP0068958B1 (en) 1984-07-25

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EP82401064A Expired EP0068958B1 (en) 1981-06-16 1982-06-11 Steam generator with a dynamic discharge system

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US (1) US4522156A (en)
EP (1) EP0068958B1 (en)
JP (1) JPS5813901A (en)
KR (1) KR880001502B1 (en)
CA (1) CA1216481A (en)
DE (1) DE3260463D1 (en)
ES (1) ES513113A0 (en)
FR (1) FR2507742A1 (en)
ZA (1) ZA824122B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250319A1 (en) * 1986-06-18 1987-12-23 Commissariat A L'energie Atomique Steam generator with improved drying means

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910002216B1 (en) * 1985-03-29 1991-04-08 가부시끼가이샤 도시바 Combined moisture separator and reheater
FI73063C (en) * 1986-02-05 1987-08-10 Santasalo Sohlberg Ab Oy GENERATOR FOER REN AONGA.
FR2616883B1 (en) * 1987-06-18 1990-03-30 Framatome Sa STEAM GENERATOR WATER PURIFICATION CONTAINER
US5249551A (en) * 1991-04-09 1993-10-05 Kirkpatrick William J Steam generation system mass and feedwater control system
JP2526446B2 (en) * 1991-08-11 1996-08-21 三浦工業株式会社 Clean steam production equipment
FR2705759B1 (en) * 1993-05-27 1995-07-07 Framatome Sa Steam generator equipped with a device for trapping migrant bodies.
CN101495805B (en) * 2006-08-28 2011-09-07 三菱重工业株式会社 Moisture separator
US20090274261A1 (en) * 2008-04-30 2009-11-05 Defilippis Michael S Steam dryer
CN103557512B (en) * 2013-10-17 2015-03-11 中国核动力研究设计院 Steam-water separator and steam generator simulation body
CN110617470A (en) * 2019-10-12 2019-12-27 清华大学 Superheated steam production system and superheated steam production method

Citations (2)

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US3906905A (en) * 1974-08-20 1975-09-23 Commissariat Energie Atomique Steam generator
FR2275731A1 (en) * 1974-06-21 1976-01-16 Westinghouse Electric Corp STEAM GENERATOR INCLUDING A HUMIDITY SEPARATOR

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FR1347938A (en) * 1961-12-11 1964-01-04 Foster Wheeler Ltd advanced heat exchangers
US3437077A (en) * 1966-01-21 1969-04-08 Babcock & Wilcox Co Once-through vapor generator
US3804069A (en) * 1972-02-09 1974-04-16 Westinghouse Electric Corp Steam generator
FR2275240A1 (en) * 1974-06-21 1976-01-16 Stein Industrie DEVICE FOR PRE-SEPARATING WATER DROPS FROM A BIPHASIC FLOW
US4068627A (en) * 1976-01-06 1978-01-17 Westinghouse Electric Corporation Steam generator with vertical tubesheets
FR2394750A1 (en) * 1977-06-15 1979-01-12 Commissariat Energie Atomique STEAM GENERATOR
US4261298A (en) * 1978-06-07 1981-04-14 The Babcock & Wilcox Company Vapor generating technique

Patent Citations (2)

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FR2275731A1 (en) * 1974-06-21 1976-01-16 Westinghouse Electric Corp STEAM GENERATOR INCLUDING A HUMIDITY SEPARATOR
US3906905A (en) * 1974-08-20 1975-09-23 Commissariat Energie Atomique Steam generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250319A1 (en) * 1986-06-18 1987-12-23 Commissariat A L'energie Atomique Steam generator with improved drying means
FR2600403A1 (en) * 1986-06-18 1987-12-24 Commissariat Energie Atomique STEAM GENERATOR WITH IMPROVED DRYING MEANS

Also Published As

Publication number Publication date
DE3260463D1 (en) 1984-08-30
CA1216481A (en) 1987-01-13
FR2507742B1 (en) 1984-12-28
US4522156A (en) 1985-06-11
KR880001502B1 (en) 1988-08-16
ES8401601A1 (en) 1983-12-16
FR2507742A1 (en) 1982-12-17
ES513113A0 (en) 1983-12-16
ZA824122B (en) 1983-05-25
JPS6367081B2 (en) 1988-12-23
KR840000762A (en) 1984-02-27
EP0068958B1 (en) 1984-07-25
JPS5813901A (en) 1983-01-26

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