WO1995027863A1 - Fume deflecting damper for combined-cycle power stations - Google Patents

Fume deflecting damper for combined-cycle power stations Download PDF

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Publication number
WO1995027863A1
WO1995027863A1 PCT/BE1995/000035 BE9500035W WO9527863A1 WO 1995027863 A1 WO1995027863 A1 WO 1995027863A1 BE 9500035 W BE9500035 W BE 9500035W WO 9527863 A1 WO9527863 A1 WO 9527863A1
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WO
WIPO (PCT)
Prior art keywords
door
register
smoke
register according
tie rods
Prior art date
Application number
PCT/BE1995/000035
Other languages
French (fr)
Inventor
Alfred Dethier
Original Assignee
Cockerill Mechanical Industries S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cockerill Mechanical Industries S.A. filed Critical Cockerill Mechanical Industries S.A.
Priority to PL95316727A priority Critical patent/PL316727A1/en
Priority to EP95915710A priority patent/EP0755490A1/en
Priority to JP7525985A priority patent/JPH10503253A/en
Priority to AU22504/95A priority patent/AU2250495A/en
Priority to CZ962995A priority patent/CZ299596A3/en
Priority to BR9507453A priority patent/BR9507453A/en
Publication of WO1995027863A1 publication Critical patent/WO1995027863A1/en
Priority to FI964015A priority patent/FI964015A0/en
Priority to NO964322A priority patent/NO964322L/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F16K11/052—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with pivoted closure members, e.g. butterfly valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Definitions

  • the present invention aims to make improvements to the smoke deflection register which is intended for so-called combined cycle power plants.
  • the so-called combined cycle power plants consist of a gas turbine driving an alternator, an energy recovery boiler generating steam and a steam turbine also driving an alternator.
  • a boiler is provided to recover the heat energy contained in the exhaust gases from the gas turbine, the latter being in fact characterized by a large volume and a high temperature.
  • the combined cycle is characterized by very low pollution, very high efficiency, and high starting speed.
  • a smoke bypass duct generally qualified as a "smoke bypass”
  • a smoke bypass duct is generally installed on the exhaust gas circuit of the gas turbine, before the boiler, in order to allow, as necessary, direct the hot gases either directly to the atmosphere or to the boiler.
  • This ensures independence of the gas and steam cycles and allows you to benefit from the advantages inherent in gas turbine, i.e. an extremely fast start-up and a very short installation time, when the steam cycle is not available or is not necessary.
  • the turbine then works in an open cycle, that is to say with direct evacuation of the fumes to the atmosphere.
  • the smoke by-pass must be equipped with a device for diverting the flow of hot gas, namely a smoke deflection register.
  • the gases circulate at speeds of the order of 100 to 150 m / H and have temperatures of the order of 650 ° C.
  • the smoke deflection register which is in fact a sophisticated equipment, must meet many performance criteria. These include, among other things, a very high level of watertightness and rapid and reliable maneuverability in all circumstances. It should also be noted that this operation is subject to very severe conditions: very large dimensions (of the order of 6mx7mx7m), high smoke temperatures, significant thermal shock, high smoke speed and great turbulence thereof.
  • multi-vent devices which include two registers, one on the smoke by-pass, the other on the gas duct in the direction of the boiler.
  • Each of these registers generally consists of several flaps each rotating on their axis. The rotation of the flaps opens or closes the gas duct where it is placed. This technique allows a good capacity for adjusting the smoke flow, but this characteristic is not sought in the combined cycle.
  • Their drawbacks are the poor sealing performance due to the great length of their sealing joint and a non-negligible risk which may arise from the simultaneous closure of the two registers which would cause significant damage to the upstream equipment.
  • This type of equipment offers very good sealing performance, guaranteeing maximum efficiency in the combined cycle and is well suited to machines with power up to 120 MW.
  • a single door is mounted on a support shaft but the control is carried out by a separate tubular shaft connected to the door by connecting rods.
  • the tubular control shaft must be of large diameter and significant thickness because, being located in the smoke by-pass it undergoes significant thermal and mechanical stresses during the operation of the door.
  • Document EP-A-0 533 282 describes the principle of controlling a door by a hinge shaft. As already mentioned, it should be noted that this type of control is reserved for small doors and turbines of limited power. Indeed, for larger sizes, it is observed that the motor torque of the shaft reaches high values leading to oversizing the mechanism.
  • control by the shaft in the case of the use of large doors does not offer any guarantee against vibrations during opening and closing operations.
  • Document US-A-4 354 528 describes a register used in a completely different application (dust collector) in which sealing is in no case required.
  • the shutter control rod is guided in an outlet tube and can in no case be exposed to high temperatures which would be liable to deteriorate it or which would risk jamming it in the guide tube.
  • Document FR-A-2 305 666 describes a register for smoke flues but which probably does not concern gas turbines.
  • the present invention aims to offer an improved device adaptable to the registers of current machines as well as those of future high power in particular, all of this avoiding the aforementioned drawbacks of the solutions of the prior art.
  • the present invention aims to offer a device which makes it possible to combine the following advantages: good sealing, control not exposed to high temperatures, simple door operating parts as well as a design which can be adapted to large dimensions sheaths in the case of powerful turbines.
  • the solution proposed by the invention consists of a register consisting of a single door hinged on a shaft intended solely to support the door in order to benefit from the advantages which are associated with it in the "Toggle" embodiment.
  • the door is maneuvered by tie rods articulated at the bottom of the door by means of spherical ball joints and which pass through the body of the damper in a lateral oblique wall of the duct. smoke.
  • the tie rods are connected to a guided transverse beam, itself maneuvered by appropriate means located on either side of the register body.
  • this maneuver is ensured by two jacks whose rectilinear movement opens or closes the door by imparting to the guided transverse beam an essentially vertical movement along the guides of the beam.
  • the door in its closed position towards the boiler that is to say that of the open cycle operation is arranged at an angle inclined with respect to the horizontal.
  • the upper corner towards the bypass is strongly cut by a side wall, preferably practically parallel to the door in said closed position.
  • the bottom of the register includes a housing that can receive the bottom of the door and forming a stop for the latter.
  • the door consists of a tubular resistance chassis designed to be able to possibly resist torsional forces, thus ensuring great stability for the assembly, and on which are mounted sealing faces each provided with simple sealing joints. or double and thermal insulation.
  • the faces are connected to the chassis by a flexible system, allowing, in a manner known per se, the differential free expansions between the elements.
  • the seals are of the conventional type with flexible metallurgical lamellae, mounted in single or double rows, possibly with injection of airtightness ensuring a total impermeability to the fumes.
  • the tightness of the tie rods when the body passes is achieved by a labyrinth system with or without sealing segments, mounted on a mobile system allowing relative transverse movements of the tie rods relative to the body.
  • a labyrinth system with or without sealing segments mounted on a mobile system allowing relative transverse movements of the tie rods relative to the body.
  • the door shaft only has the function of supporting the door, this shaft is therefore not motor and its ends do not pass through the body of the damper and no complementary motor shaft (which in the case of the Toggle execution form is provided) does not exist in the proposed form, which avoids the sealing problems specific to this level.
  • the bearings of the support shaft according to the embodiment also consist of spherical ball joints.
  • the body of the register is thermally insulated, either internally or externally.
  • Control systems including cylinders can be mechanical or hydraulic.
  • a control system is provided to permanently ensure the perfectly synchronized operation of the two cylinders.
  • the damper can be equipped with an integrated closing plate, installed at the outlet of the damper in the direction of the boiler and which ensures a total seal against smoke and temperature and allows the mounting and / or maintenance of the boiler while keeping the gas turbine in service, in open cycle.
  • an integrated closing plate installed at the outlet of the damper in the direction of the boiler and which ensures a total seal against smoke and temperature and allows the mounting and / or maintenance of the boiler while keeping the gas turbine in service, in open cycle.
  • the tie rods work in pure traction and compression, and are therefore easily loaded: heavy parts which do not withstand thermal stresses well are avoided.
  • the dimensions are adaptable to any gas turbine, whatever its power and its exhaust temperature. -
  • the door is firmly held at 4 points with reduced play and by design the point of instability practically no longer exists.
  • Figure 1 is a schematic representation of a combined cycle power plant.
  • FIG. 2 shows a schematic side view, in partial section, of a through-tie damper according to the invention in the position of opening towards the smoke bypass duct (smoke bypass).
  • Figure 3 is a schematic view similar to Figure 2 illustrating the two positions of the door and the movement of the tie rods.
  • FIG. 4 is a front view, from left to right, that is to say from the gas turbine side to the boiler corresponding to FIG. 2.
  • Figure 5 is a general perspective view of the register from the rear, that is to say that the gases from the gas turbine arrive from the right of the figure.
  • Figure 6 is a detailed view of the hinge of the door on its axis (detail A in Figure 3).
  • Figure 7 is a detail view of the sealing joints for tie rods in the body of the bypass (detail B in Figure 3)
  • a combined cycle power plant as shown in Figure 1, consists essentially of a gas turbine 1 driving an alternator, an energy recovery boiler 3 generating steam used to supply a steam turbine also driving an alternator.
  • a register 2 must allow, as the case may be whether or not to use the boiler, to direct the gases either directly to the atmosphere through the chimney 4, or towards the boiler 3 and then towards the atmosphere through the chimney 5.
  • the essential characteristic is the fact that the register according to the invention is first of all mono-louver therefore consists of a single door 10 hinged to a shaft 11 intended only to support the door.
  • the door is maneuvered by tie rods 13 articulated at the bottom of the door by means of spherical ball joints 15.
  • the articulated tie rods pass through the body of the damper 2 in a lateral oblique wall 22 of the duct smoke bypass 21.
  • the tie rods are connected at their upper part to a transverse beam 31, itself maneuvered by appropriate means, located on either side of the body of the register in this case, hydraulic cylinders 35.
  • the beam 31 is held in a guide device 33.
  • the door can thus carry out a movement from a substantially horizontal position which closes the smoke bypass duct (indicated as 10 ′ in FIG. 3) towards a position (indicated as 10 ′′ in FIG. 3) which is inclined relative to the horizontal, the corner 40 towards the bypass is strongly cut for the reasons mentioned in the characteristic elements.
  • the bottom of the register comprises a housing forming a stop 41 which can receive the door and avoid turbulence which would otherwise be caused by the projecting part of the door projecting from the bottom.
  • the door consists of a tubular resistance frame on which sealing faces are mounted.
  • the seals are of the conventional type.
  • the invention provides that the tie rod is provided with a bellows seal system 43 which allows relative transverse movements tie rods relative to the body 22.
  • a labyrinth system preferably provided with sealing segments also allows the longitudinal movement of the tie relative to the body.
  • an appropriate arrangement of the tie rods allows complete movement (from position 10 ′ to position 10 ′′) of the door with limited transverse movements of the tie rods relative to the body of the damper.
  • no control shaft is arranged in the stream of hot gases (fumes) derived by the bypass.

Abstract

A fume deflecting damper for combined-cycle power stations. The damper consists of a shutter (10) hinged to shaft (11) provided only for supporting said shutter (10). The shutter (10) is moved by means of tie-rods (13) hingedly connected to the lower portion of the shutter (10), preferably via ball joints (15), and extending through a sloping side wall (22) of the fume duct (21) in the damper body (2).

Description

REGISTRE DE DEVIATION DES FUMEES D'INSTALLATION DE CENTRALES ELECTRIQUES DITES A CYCLE COMBINE REGISTER OF DEVIATION OF THE SMOKE OF INSTALLATION OF POWER PLANTS SAID WITH COMBINED CYCLE
Obiet de l'inventionObject of the invention
La présente invention vise à apporter des améliorations au registre de déviation des fumées qui est destiné aux centrales électriques dites à cycle combiné. Arrière-plan technologiqueThe present invention aims to make improvements to the smoke deflection register which is intended for so-called combined cycle power plants. Technological background
Les centrales électriques dites à cycle combiné sont constituées d'une turbine à gaz entraînant un alternateur, d'une chaudière de récupération d'énergie générant de la vapeur et d'une turbine à vapeur entraînant également un alternateur.The so-called combined cycle power plants consist of a gas turbine driving an alternator, an energy recovery boiler generating steam and a steam turbine also driving an alternator.
Une chaudière est prévue pour récupérer l'énergie calorifique contenue dans les gaz d'échappement de la turbine à gaz, les derniers étant en fait caractérisés par un grand volume et une température élevée.A boiler is provided to recover the heat energy contained in the exhaust gases from the gas turbine, the latter being in fact characterized by a large volume and a high temperature.
Le cycle combiné se caractérise par une pollution très réduite, un rendement très élevé, et une grande vitesse de démarrage.The combined cycle is characterized by very low pollution, very high efficiency, and high starting speed.
Dans ce type d'installation, un conduit de dérivation des - fumées, qualifié généralement de "by-pass fumée", est généralement installé sur le circuit des gaz d'échappement de la turbine à gaz, avant la chaudière, afin de permettre, selon les nécessités, de diriger les gaz chauds soit directement vers l'atmosphère, soit vers la chaudière. Ceci assure une indépendance des cycles gaz et vapeur et permet de bénéficier des avantages inhérents à la turbine à gaz, à savoir un démarrage extrêmement rapide et un délai d'installation très court, lorsque le cycle vapeur n'est pas disponible ou n'est pas nécessaire. La turbine travaille alors en cycle ouvert c'est-à-dire avec évacuation directe des fumées à l'atmosphère.In this type of installation, a smoke bypass duct, generally qualified as a "smoke bypass", is generally installed on the exhaust gas circuit of the gas turbine, before the boiler, in order to allow, as necessary, direct the hot gases either directly to the atmosphere or to the boiler. This ensures independence of the gas and steam cycles and allows you to benefit from the advantages inherent in gas turbine, i.e. an extremely fast start-up and a very short installation time, when the steam cycle is not available or is not necessary. The turbine then works in an open cycle, that is to say with direct evacuation of the fumes to the atmosphere.
Bien entendu, le by-pass fumée doit être équipé d'un organe permettant de dévier le débit de gaz chaud, à savoir un registre de déviation des fumées.Of course, the smoke by-pass must be equipped with a device for diverting the flow of hot gas, namely a smoke deflection register.
Il est à noter que le marché actuel des turbines à gaz tend à une augmentation des puissances des machines qui vont actuellement de 100 MW jusqu'à 230 MW, puissances qui risquent d'aller au-delà dans un proche avenir.It should be noted that the current market for gas turbines is tending to increase the power of the machines which currently range from 100 MW to 230 MW, powers which are likely to go beyond in the near future.
Dans ces conditions opératoires, les gaz circulent à des vitesses de l'ordre de 100 à 150 m/H et présentent des températures de l'ordre de 650°C.Under these operating conditions, the gases circulate at speeds of the order of 100 to 150 m / H and have temperatures of the order of 650 ° C.
Le registre de déviation des fumées qui est en fait un équipement sophistiqué, doit répondre à beaucoup de critères de performances. On peut citer entre autre un très haut niveau d'étancheité et une manoeuvrabilité rapide et fiable en toutes circonstances. Il convient de noter également que ce fonctionnement est soumis à des conditions très sévères: très grandes dimensions (de l'ordre de 6mx7mx7m) , températures élevées des fumées, chocs thermiques importants, haute vitesse des fumées et grandes turbulences de celles-ci.The smoke deflection register, which is in fact a sophisticated equipment, must meet many performance criteria. These include, among other things, a very high level of watertightness and rapid and reliable maneuverability in all circumstances. It should also be noted that this operation is subject to very severe conditions: very large dimensions (of the order of 6mx7mx7m), high smoke temperatures, significant thermal shock, high smoke speed and great turbulence thereof.
On connaît déjà plusieurs technologies qui sont appliquées industriellement et qui bénéficient chacune de leurs avantages et inconvénients.Several technologies are already known which are applied industrially and which each benefit from their advantages and disadvantages.
On connaît notamment les dispositifs dits "multi- ventelle" qui comportent deux registres, l'un sur le by-pass fumée, l'autre sur le conduit des gaz en direction de la chaudière.Are known in particular the so-called "multi-vent" devices which include two registers, one on the smoke by-pass, the other on the gas duct in the direction of the boiler.
Chacun de ces registres se compose généralement de plusieurs volets tournant chacun sur leur axe. La rotation des volets ouvre ou ferme le conduit des gaz où il est disposé. Cette technique permet une bonne capacité de réglage du débit des fumées mais cette caractéristique n'est pas recherchée en cycle combiné. Leurs inconvénients sont la faible performance d'étancheité du fait de la grande longueur de leur joint d'étancheité et un risque non négligeable pouvant provenir de la fermeture simultanée des deux registres ce qui entraînerait des dégâts importants au matériel amont.Each of these registers generally consists of several flaps each rotating on their axis. The rotation of the flaps opens or closes the gas duct where it is placed. This technique allows a good capacity for adjusting the smoke flow, but this characteristic is not sought in the combined cycle. Their drawbacks are the poor sealing performance due to the great length of their sealing joint and a non-negligible risk which may arise from the simultaneous closure of the two registers which would cause significant damage to the upstream equipment.
Ces registres, par suite de leurs faibles performances, ne sont pratiquement pas utilisés en cycle combiné mais sont réservés à des applications industrielles où un réglage de débit des fumées vers la chaudière peut s'avérer nécessaire.These registers, owing to their poor performance, are practically not used in the combined cycle but are reserved for industrial applications where adjustment of the smoke flow to the boiler may prove necessary.
Il existe aussi des dispositifs à simple porte articulée sur un arbre moteur. La porte ferme soit le conduit des gaz vers la chaudière, soit le conduit des gaz vers le by-pass.There are also devices with a single door hinged on a motor shaft. The door closes either the gas pipe to the boiler or the gas pipe to the bypass.
Ce type de matériel offre de très bonnes performances d'étancheité, garantissant le rendement maximum au cycle combiné et est bien adapté aux machines de puissance jusqu'à 120 MW.This type of equipment offers very good sealing performance, guaranteeing maximum efficiency in the combined cycle and is well suited to machines with power up to 120 MW.
Néanmoins, du fait de la pression des gaz qui s'oppose au début à l'ouverture de la porte puis ensuite vers le milieu de la course d'ouverture, les gaz d'échappement tour à tour s'opposent ou facilitent l'ouverture ce qui provoque de fortes vibrations puis enfin cette pression tend à augmenter la vitesse d'ouverture, toutes ces variations très importantes de contraintes dans l'arbre support de porte ainsi que dans tout le système de commande nécessitent un ensemble de très forte dimension. Un autre inconvénient résulte de la limite technologique de hauteur de porte, interdisant son utilisation pour les turbines à gaz modernes de grande puissance.However, due to the gas pressure which opposes the opening of the door at the start and then towards the middle of the opening stroke, the exhaust gases in turn oppose or facilitate opening. which causes strong vibrations then finally this pressure tends to increase the opening speed, all these very significant variations in stresses in the door support shaft as well as in the entire control system require a very large assembly. Another disadvantage results from the technological limit of door height, prohibiting its use for modern high-power gas turbines.
Ce type de registre est cependant de loin le plus couramment utilisé de par le monde, pour des turbines à gaz limitées en puissance. On a en conséquence proposé des registres à simple porte mais dont la commande est assurée par un arbre auxiliaire, qualifié généralement de "Toggle".This type of damper is however by far the most commonly used worldwide, for gas turbines limited in power. Consequently, single-door dampers have been proposed, but the control of which is ensured by an auxiliary shaft, generally qualified as "Toggle".
Dans cette forme d'exécution, une simple porte est montée sur un arbre support mais la commande s'effectue par un arbre tubulaire séparé relié à la porte par des bielles.In this embodiment, a single door is mounted on a support shaft but the control is carried out by a separate tubular shaft connected to the door by connecting rods.
Tout en offrant les mêmes avantages que les registres à commande directe précités, elles peuvent être mieux adaptées aux turbines à gaz de grande puissance. Cependant, leurs inconvénients sont que le problème d'instabilité existe toujours quoi que réduit par rapport à la solution précédente.While offering the same advantages as the aforementioned direct control dampers, they can be better adapted to large power gas turbines. However, their drawbacks are that the instability problem still exists, although reduced compared to the previous solution.
De plus, la commande hydraulique est plus difficile à implanter, l'arbre ayant une rotation supérieure à 120°C. L'arbre de commande tubulaire doit être de gros diamètre et d'épaisseur importante car, étant situé dans le by-pass fumée il subit des contraintes thermiques et mécaniques importantes lors de la manoeuvre de la porte.In addition, the hydraulic control is more difficult to install, the shaft having a rotation greater than 120 ° C. The tubular control shaft must be of large diameter and significant thickness because, being located in the smoke by-pass it undergoes significant thermal and mechanical stresses during the operation of the door.
On a également proposé des registres à trois portes qui sont constitués de trois portes indépendantes les unes des autres et qui ferment chacune une partie du passage des fumées. Tout en étant adaptables aux turbines à gaz modernes de grande puissance, ils se caractérisent par de moins bonnes performances d'étancheité (résultant de la surlongueur des joints d'étancheité) par une complexité de commandes importantes puisqu'il faut agir sur trois arbres et par une sécurité intrinsèque douteuse du fait qu'une ouverture accidentelle est possible par simple défaut de la tension électrique. Le document WO88/09458 décrit un mécanisme de commande de porte exposé aux fumées à haute température, de telle sorte que l'arbre et les bielles subissent des contraintes thermiques importantes lors de la manoeuvre de la porte, pouvant conduire à des déformations qui peuvent porter préjudice à l'étanchéité de la porte. En effet, les joints flexibles ne possèdent qu'une capacité d'adaptation limitée et insuffisante pour compenser les déformations subies par une porte "voilée".We have also proposed three-door dampers which consist of three doors independent of each other and which each close part of the smoke passage. While being adaptable to modern high-power gas turbines, they are characterized by poorer sealing performance (resulting from the excess length of sealing joints) by a large complexity of controls since it is necessary to act on three shafts and by an intrinsic safety questionable because an accidental opening is possible by simple fault of the electric voltage. Document WO88 / 09458 describes a door control mechanism exposed to high temperature smoke, so that the shaft and the connecting rods undergo significant thermal stresses during the operation of the door, which can lead to deformations which can carry damage to the watertightness of the door. Indeed, flexible joints only have an adaptability limited and insufficient to compensate for the deformations suffered by a "veiled" door.
Le document US-A-3 605 811 décrit un mécanisme qui peut être assimilé à une vanne ou un distributeur pneumatique de type à tiroir coulissant qui présente comme principal inconvénient une étanchéité insuffisante à hautes températures.The document US Pat. No. 3,605,811 describes a mechanism which can be likened to a pneumatic valve or valve of the sliding drawer type which has as main drawback an insufficient seal at high temperatures.
De par sa conception, les dimensions de la vanne sont forcément réduites. Le fait d'utiliser le principe de coulisse ent du tiroir avec une certaine précision d'usinage, en particulier des glissières, ne permet pas de s'accommoder de températures élevées ni de grands débits gazeux.By design, the dimensions of the valve are necessarily reduced. The fact of using the sliding principle of the drawer with a certain machining precision, in particular of the slides, does not make it possible to accommodate high temperatures or large gas flow rates.
En outre, on observe que le vérin qui commande le tiroir est en attaque directe, de telle sorte que la tige de celui-ci souffrira des contraintes thermiques imposées au système.In addition, it is observed that the jack which controls the drawer is in direct attack, so that the rod of the latter will suffer from the thermal stresses imposed on the system.
Le document EP-A-0 533 282 décrit le principe de commande d'une porte par un arbre charnière. Ainsi que déjà mentionné, il convient de noter que ce type de commande est réservé aux portes de petite dimension et aux turbines de puissance limitée. En effet, pour des tailles supérieures, on observe que le couple moteur de l'arbre atteint des valeurs élevées conduisant à surdimensionner le mécanisme.Document EP-A-0 533 282 describes the principle of controlling a door by a hinge shaft. As already mentioned, it should be noted that this type of control is reserved for small doors and turbines of limited power. Indeed, for larger sizes, it is observed that the motor torque of the shaft reaches high values leading to oversizing the mechanism.
En outre, la commande par l'arbre dans le cas de l'utilisation de portes de grande dimension, n'offre aucune garantie contre les vibrations lors de manoeuvres d'ouverture et de fermeture.In addition, the control by the shaft in the case of the use of large doors, does not offer any guarantee against vibrations during opening and closing operations.
Le document US-A-4 354 528 décrit un registre utilisé dans une application totalement différente (collecteur de poussière) dans laquelle l'étanchéité n'est en aucun cas requise. En outre, on observe que la tige de commande du volet est guidée dans un tube de sortie et ne peut en aucun cas être exposée aux hautes températures qui seraient susceptibles de la détériorer ou qui risqueraient de la coincer dans le tube de guidage. Le document FR-A-2 305 666 décrit un registre pour carneaux de fumée mais qui ne concerne probablement pas les turbines à gaz. On observe que dans ce document, la direction des fumées se présente dans le sens articulation - extrémité en glissant vers la porte, de telle sorte que la manoeuvre par un système à câbles d'une porte placée dans un tel courant gazeux va provoquer le problème suivant : pour une position précise de la porte, les turbulences qui se créent dans une zone située au nez de celle-ci vont engendrer des efforts aérodynamiques variables en intensité et en direction. Ceux-ci vont provoquer des vibrations qui risquent de s'amplifier si la porte se met en résonnance avec son système de commande qui est élastique, éventuellement jusqu'à la ruine de celui-ci. Il convient enfin de noter que le système à câbles, de par son élasticité, n'assure pas un positionnement précis de la porte, car celui-ci dépend essentiellement de la position d'équilibre entre la pression des gaz agissant sur une face et l'élasticité du système de manoeuvre. Buts visés par la présente inventionDocument US-A-4 354 528 describes a register used in a completely different application (dust collector) in which sealing is in no case required. In addition, it is observed that the shutter control rod is guided in an outlet tube and can in no case be exposed to high temperatures which would be liable to deteriorate it or which would risk jamming it in the guide tube. Document FR-A-2 305 666 describes a register for smoke flues but which probably does not concern gas turbines. It is observed that in this document, the direction of the fumes is presented in the articulation direction - end while sliding towards the door, so that the operation by a cable system of a door placed in such a gaseous current will cause the problem next: for a precise position of the door, the turbulence that is created in an area located at the nose of it will generate aerodynamic forces varying in intensity and direction. These will cause vibrations which are likely to amplify if the door starts to resonate with its control system which is elastic, possibly up to the ruin of it. Finally, it should be noted that the cable system, due to its elasticity, does not ensure precise positioning of the door, since this essentially depends on the position of equilibrium between the pressure of the gases acting on one side and the elasticity of the operating system. Aims of the present invention
La présente invention vise à offrir un dispositif amélioré adaptable aux registres des machines actuelles ainsi qu'à celles futures de puissance élevée en particulier, tout cela en évitant les inconvénients précités des solutions de l'état de la technique.The present invention aims to offer an improved device adaptable to the registers of current machines as well as those of future high power in particular, all of this avoiding the aforementioned drawbacks of the solutions of the prior art.
En particulier, la présente invention vise à offrir un dispositif qui permet de combiner les avantages suivants : une bonne étanchéité, une commande non exposée aux hautes températures, des pièces simples de manoeuvre de porte ainsi qu'une conception pouvant s'adapter aux grandes dimensions de gaines dans le cas de turbines puissantes.In particular, the present invention aims to offer a device which makes it possible to combine the following advantages: good sealing, control not exposed to high temperatures, simple door operating parts as well as a design which can be adapted to large dimensions sheaths in the case of powerful turbines.
Divers avantages, caractéristiques techniques et perfectionnements propres à l'invention apparaîtront dans la description qui suit des éléments caractéristiques de l'invention et de formes d'exécution préférées de l'invention Eléments caractéristiques de l'inventionVarious advantages, technical characteristics and improvements specific to the invention will appear in the following description of the characteristic elements of the invention and of preferred embodiments of the invention Character-defining elements of the invention
Pour atteindre les buts précités, il importe de protéger autant que possible les éléments de commande de la porte, de l'effet de chocs thermiques auxquels ils sont exposés dans les formes d'exécution précédemment décrites.To achieve the above-mentioned goals, it is important to protect the door control elements as much as possible from the thermal shock effect to which they are exposed in the embodiments described above.
La solution proposée par l'invention consiste en un registre constitué d'une seule porte articulée sur un arbre destiné uniquement à supporter la porte afin de bénéficier des avantages qui y sont associés dans la forme d'exécution "Toggle".The solution proposed by the invention consists of a register consisting of a single door hinged on a shaft intended solely to support the door in order to benefit from the advantages which are associated with it in the "Toggle" embodiment.
Selon la forme d'exécution de l'invention, la manoeuvre de la porte s'effectue par des tirants articulés dans le bas de la porte par l'intermédiaire de rotules sphériques et qui traversent le corps du registre dans une paroi oblique latérale du conduit de fumée.According to the embodiment of the invention, the door is maneuvered by tie rods articulated at the bottom of the door by means of spherical ball joints and which pass through the body of the damper in a lateral oblique wall of the duct. smoke.
Les tirants sont connectés à une poutre transversale guidée, elle-même manoeuvrée par des moyens appropriés situés de part et d'autre du corps du registre.The tie rods are connected to a guided transverse beam, itself maneuvered by appropriate means located on either side of the register body.
De préférence, cette manoeuvre est assurée par deux vérins dont le mouvement rectiligne ouvre ou ferme la porte en imprimant à la poutre transversale guidée un mouvement essentiellement vertical le long des guides de la poutre.Preferably, this maneuver is ensured by two jacks whose rectilinear movement opens or closes the door by imparting to the guided transverse beam an essentially vertical movement along the guides of the beam.
Afin de réduire nettement les pertes de charge des fumées en cycle ouvert ainsi que la génération de bruits, consécutive au changement brutal de direction des fumées, diverses mesures spécifiques sont prévues selon l'invention.In order to significantly reduce the pressure drop of the smoke in the open cycle as well as the generation of noise, following the sudden change in direction of the smoke, various specific measures are provided according to the invention.
D'une part, la porte dans sa position fermée vers la chaudière, c'est-à-dire celle du fonctionnement en cycle ouvert est disposée selon un angle incliné par rapport à l'horizontale.On the one hand, the door in its closed position towards the boiler, that is to say that of the open cycle operation is arranged at an angle inclined with respect to the horizontal.
Ceci contribue à guider les fumées en cycle ouvert vers la cheminée.This helps guide the smoke in the open cycle to the chimney.
D'autre part, le coin supérieur vers le by-pass est fortement coupé par une paroi latérale, de préférence pratiquement parallèle à la porte dans ladite position fermée. Finalement, le fond du registre comporte un logement pouvant recevoir le bas de la porte et formant butée pour celle-ci.On the other hand, the upper corner towards the bypass is strongly cut by a side wall, preferably practically parallel to the door in said closed position. Finally, the bottom of the register includes a housing that can receive the bottom of the door and forming a stop for the latter.
Toutes ces mesures contribuent à éviter les turbulences pouvant entraîner des pertes de charge et des bruits et de plus, le coin coupé permet aisément de recevoir le point de passage des tirants dans la paroi latérale du registre.All these measures help to avoid turbulence which can cause pressure drops and noise, and moreover, the cut corner makes it easy to receive the point of passage of the tie rods in the side wall of the damper.
La porte est constituée d'un châssis tubulaire de résistance étudié pour pouvoir résister éventuellement à des efforts de torsion, assurant ainsi une grande stabilité de l'ensemble, et sur lequel sont montées des faces d'étancheité munies chacune de joints d'étancheité simples ou doubles et d'isolation thermique. Les faces sont reliées au châssis par un système souple, permettant de manière connue en soi, les libres dilatations différentielles entre les éléments.The door consists of a tubular resistance chassis designed to be able to possibly resist torsional forces, thus ensuring great stability for the assembly, and on which are mounted sealing faces each provided with simple sealing joints. or double and thermal insulation. The faces are connected to the chassis by a flexible system, allowing, in a manner known per se, the differential free expansions between the elements.
Les joints d'étancheité sont du type classique à lamelles métallurgiques souples, montés en simple ou double rangées, éventuellement avec injection d'air d'étancheité assurant une totale étanchéité aux fumées.The seals are of the conventional type with flexible metallurgical lamellae, mounted in single or double rows, possibly with injection of airtightness ensuring a total impermeability to the fumes.
L'échanchéité des tirants au passage du corps, est réalisée par un système de labyrinthe muni ou non de segments d'étancheité, montés sur un système mobile permettant des mouvements transversaux relatifs des tirants par rapport au corps. Par une disposition appropriée des tirants, les mouvements transversaux précités sont cependant généralement de faible ampleur.The tightness of the tie rods when the body passes, is achieved by a labyrinth system with or without sealing segments, mounted on a mobile system allowing relative transverse movements of the tie rods relative to the body. By an appropriate arrangement of the tie rods, the aforementioned transverse movements are however generally small.
Dans cette forme d'exécution, l'arbre de la porte a uniquement pour fonction de soutenir celle-ci, cet arbre n'est donc pas moteur et ses extrémités ne traversent pas le corps du registre et aucun arbre moteur complémentaire (qui dans le cas de la forme d'exécution Toggle est prévu) n'existe dans la forme proposée, ce qui évite les problèmes d'étancheité spécifiques à ce niveau. Les paliers de l'arbre support selon la forme d'exécution sont également constitués de rotules sphériques. De manière classique et connue en soi, le corps du registre est isolé thermiquement, soit intérieurement, soit extérieurement.In this embodiment, the door shaft only has the function of supporting the door, this shaft is therefore not motor and its ends do not pass through the body of the damper and no complementary motor shaft (which in the case of the Toggle execution form is provided) does not exist in the proposed form, which avoids the sealing problems specific to this level. The bearings of the support shaft according to the embodiment also consist of spherical ball joints. Conventionally and known per se, the body of the register is thermally insulated, either internally or externally.
Les systèmes de commande incluant des vérins peuvent être mécaniques ou hydrauliques. Dans le cas d'une commande hydraulique, un système de contrôle est prévu pour assurer en permanence la manoeuvre parfaitement synchronisée des deux vérins.Control systems including cylinders can be mechanical or hydraulic. In the case of hydraulic control, a control system is provided to permanently ensure the perfectly synchronized operation of the two cylinders.
De plus, le registre peut être équipé d'une tôle de fermeture intégrée, installée à la sortie du registre en direction de la chaudière et qui assure une étanchéité totale aux fumées et à la température et permet le montage et/ou l'entretien de la chaudière tout en maintenant la turbine à gaz en service, en cycle ouvert. Par rapport aux systèmes existants, le dispositif de l'invention offre des avantages importants:In addition, the damper can be equipped with an integrated closing plate, installed at the outlet of the damper in the direction of the boiler and which ensures a total seal against smoke and temperature and allows the mounting and / or maintenance of the boiler while keeping the gas turbine in service, in open cycle. Compared to existing systems, the device of the invention offers significant advantages:
Dimensions réduites de l'arbre puisque uniquement support de porte et non moteur.Reduced shaft dimensions since only door support and not motor.
Les tirants travaillent en traction-compression pure, et sont donc facilement chargés: les lourdes pièces résistant mal aux contraintes thermiques sont évitées.The tie rods work in pure traction and compression, and are therefore easily loaded: heavy parts which do not withstand thermal stresses well are avoided.
Les pertes de charge fumée sont réduites en fonctionnement de la turbine à gaz vers le by-pass fumée: le rendement s'en trouve nettement amélioré en cycle ouvert.The smoke pressure drops are reduced in operation from the gas turbine to the smoke bypass: the efficiency is clearly improved in the open cycle.
Les dimensions sont adaptables à toute turbine à gaz, quelque soit sa puissance et sa température d'échappement. - La porte est fermement tenue en 4 points avec jeux réduits et de par sa conception le point d'instabilité n'existe pratiquement plus.The dimensions are adaptable to any gas turbine, whatever its power and its exhaust temperature. - The door is firmly held at 4 points with reduced play and by design the point of instability practically no longer exists.
Pas de fuite aux étanchéités d'arbre puisque l'arbre ne traverse pas le corps: gains en rendement, plus de risques inhérents aux fuites de gaz chauds. De par la forme générale, la génération de bruit est fortement réduite et permet d'éviter un silencieux additionnel éventuel.No leakage at shaft seals since the shaft does not cross the body: efficiency gains, more risks inherent in hot gas leaks. Due to the general shape, the generation of noise is greatly reduced and makes it possible to avoid any additional silencer.
L'invention sera décrite plus en détail sous forme d'un mode d'exécution préféré de l'invention en référence aux dessins annexés, le tout étant destiné à illustrer l'invention, sans aucun caractère limitatif. Brève description des dessinsThe invention will be described in more detail in the form of a preferred embodiment of the invention with reference to the accompanying drawings, the whole being intended to illustrate the invention, without any limiting character. Brief description of the drawings
La figure 1 est une représentation schématique d'une centrale électrique à cycle combiné.Figure 1 is a schematic representation of a combined cycle power plant.
La figure 2 représente une vue de côté, schématique, en coupe partielle, d'un registre à tirants traversants selon l'invention dans la position d'ouverture vers le conduit de dérivation des fumées (by-pass fumée) . La figure 3 est une vue schématique similaire à la figure 2 illustrant les deux positions de la porte et le mouvement des tirants.2 shows a schematic side view, in partial section, of a through-tie damper according to the invention in the position of opening towards the smoke bypass duct (smoke bypass). Figure 3 is a schematic view similar to Figure 2 illustrating the two positions of the door and the movement of the tie rods.
La figure 4 est une vue de face, de la gauche vers la droite, c'est-à-dire du côté turbine à gaz vers chaudière correspondant à la figure 2.FIG. 4 is a front view, from left to right, that is to say from the gas turbine side to the boiler corresponding to FIG. 2.
La figure 5 est une vue générale en perspective du registre depuis l'arrière, c'est-à-dire que les gaz provenant de la turbine à gaz arrivent depuis la droite de la figure.Figure 5 is a general perspective view of the register from the rear, that is to say that the gases from the gas turbine arrive from the right of the figure.
La figure 6 est une vue de détail de l'articulation de la porte sur son axe (détail A sur la figure 3) .Figure 6 is a detailed view of the hinge of the door on its axis (detail A in Figure 3).
La figure 7 est une vue de détail des joints d'étancheité pour des tirants dans le corps du by-pass (détail B sur la figure 3)Figure 7 is a detail view of the sealing joints for tie rods in the body of the bypass (detail B in Figure 3)
Description d'une forme d'exécution préférée de l'invention. Une centrale électrique à cycle combiné, comme l'indique la figure 1, est essentiellement constituée d'une turbine à gaz 1 entraînant un alternateur, d'une chaudière de récupération d'énergie 3 générant de la vapeur servant à alimenter une turbine à vapeur entraînant également un alternateur.Description of a preferred embodiment of the invention. A combined cycle power plant, as shown in Figure 1, consists essentially of a gas turbine 1 driving an alternator, an energy recovery boiler 3 generating steam used to supply a steam turbine also driving an alternator.
Un registre 2 doit permettre selon le cas d'utilisation ou non de la chaudière, de diriger les gaz soit directement vers l'atmosphère par la cheminée 4, soit vers la chaudière 3 et ensuite vers l'atmosphère par la cheminée 5. La caractéristique essentielle est le fait que le registre selon l'invention est tout d'abord mono-ventelle donc est constitué d'une seule porte 10 articulée à un arbre 11 destiné uniquement à supporter la porte.A register 2 must allow, as the case may be whether or not to use the boiler, to direct the gases either directly to the atmosphere through the chimney 4, or towards the boiler 3 and then towards the atmosphere through the chimney 5. The essential characteristic is the fact that the register according to the invention is first of all mono-louver therefore consists of a single door 10 hinged to a shaft 11 intended only to support the door.
Selon l'invention, la manoeuvre de la porte s'effectue par des tirants 13 articulés dans le bas de la porte par l'intermédiaire de rotules sphériques 15. Les tirants articulés traversent le corps du registre 2 dans une paroi oblique latérale 22 du conduit de dérivation de fumée 21. Comme il apparaît le mieux aux figures 4 et 5, les tirants sont connectés à leur partie supérieure à une poutre transversale 31, elle-même manoeuvrée par des moyens appropriés, situés de part et d'autre du corps du registre en l'occurrence, des vérins hydrauliques 35. Avantageusement, la poutre 31 est maintenue dans un dispositif de guidage 33.According to the invention, the door is maneuvered by tie rods 13 articulated at the bottom of the door by means of spherical ball joints 15. The articulated tie rods pass through the body of the damper 2 in a lateral oblique wall 22 of the duct smoke bypass 21. As is best seen in Figures 4 and 5, the tie rods are connected at their upper part to a transverse beam 31, itself maneuvered by appropriate means, located on either side of the body of the register in this case, hydraulic cylinders 35. Advantageously, the beam 31 is held in a guide device 33.
La porte peut ainsi effectuer un mouvement depuis une position sensiblement horizontale qui ferme le conduit de dérivation de fumée (indiqué comme 10' dans la figure 3) vers une position (indiqué comme 10'' dans la figure 3) qui est inclinée par rapport à l'horizontale, le coin 40 vers le by-pass est fortement coupé pour les raisons citées dans les éléments caractéristiques.The door can thus carry out a movement from a substantially horizontal position which closes the smoke bypass duct (indicated as 10 ′ in FIG. 3) towards a position (indicated as 10 ″ in FIG. 3) which is inclined relative to the horizontal, the corner 40 towards the bypass is strongly cut for the reasons mentioned in the characteristic elements.
Avantageusement, le fond du registre comporte un logement formant butée 41 pouvant recevoir la porte et éviter des turbulences qui autrement seraient provoquées par la partie saillante de la porte débordant du fond.Advantageously, the bottom of the register comprises a housing forming a stop 41 which can receive the door and avoid turbulence which would otherwise be caused by the projecting part of the door projecting from the bottom.
La porte est constituée d'un châssis tubulaire de résistance sur lequel sont montées des faces d'étancheité. Les joints d'étancheité sont de type classique. Pour ce qui concerne l'étanchéité des tirants 13 au passage du corps du registre, plus particulièrement sur la partie inclinée 22, l'invention prévoit que le tirant est pourvu d'un système d'étancheité à soufflets 43 qui permet des mouvements transversaux relatifs des tirants par rapport au corps 22.The door consists of a tubular resistance frame on which sealing faces are mounted. The seals are of the conventional type. As regards the tightness of the tie rods 13 when the body of the damper passes, more particularly on the inclined part 22, the invention provides that the tie rod is provided with a bellows seal system 43 which allows relative transverse movements tie rods relative to the body 22.
Un système de labyrinthe de préférence muni de segments d'étancheité permet également le mouvement longitudinal du tirant par rapport au corps. Ainsi qu'on le notera, une disposition appropriée des tirants permet le mouvement complet (depuis la position 10' vers la position 10'') de la porte avec des mouvements transversaux limités des tirants par rapport au corps du registre. On notera également que contrairement aux dispositifs de l'état de la technique, aucun arbre de commande n'est disposé dans le courant de gaz chauds (fumées) dérivé par le by-pass. A labyrinth system preferably provided with sealing segments also allows the longitudinal movement of the tie relative to the body. As will be noted, an appropriate arrangement of the tie rods allows complete movement (from position 10 ′ to position 10 ″) of the door with limited transverse movements of the tie rods relative to the body of the damper. It will also be noted that, unlike the devices of the prior art, no control shaft is arranged in the stream of hot gases (fumes) derived by the bypass.

Claims

Revendications claims
1. Registre de déviation d'installation de fumée destiné à des centrales électriques à cycle combiné constitué d'une porte (10) articulée sur un arbre (11) destiné uniquement à supporter la porte (10) caractérisé en ce que la manoeuvre de la porte (10) s'effectue par des tirants (13) articulés dans le bas de la porte (10) , de préférence par l'intermédiaire de rotules sphériques (15) et qui traverse le corps du registre (2) dans une paroi oblique latérale (22) du conduit de fumée (21) .1. Smoke installation deflection register for combined cycle power plants consisting of a door (10) hinged on a shaft (11) intended only to support the door (10) characterized in that the operation of the door (10) is effected by tie rods (13) articulated in the bottom of the door (10), preferably by means of spherical ball joints (15) and which passes through the body of the damper (2) in an oblique wall side (22) of the smoke duct (21).
2. Registre selon la revendication 1 caractérisé en ce que les tirants (13) sont connectés à une poutre transversale guidée (31) elle-même manoeuvrée par des moyens (35) appropriés situés de part et d'autre du corps du registre (2) .2. Register according to claim 1 characterized in that the tie rods (13) are connected to a guided transverse beam (31) itself operated by suitable means (35) located on either side of the register body (2 ).
3. Registre selon la revendication 2 caractérisé en ce que la manoeuvre de la poutre est assurée par deux vérins (35) dont le mouvement rectiligne ouvre ou ferme la porte (10) en imprimant à la poutre transversale guidée (31) un mouvement essentiellement vertical le long de guides (33) de la poutre (31) .3. Register according to claim 2 characterized in that the operation of the beam is ensured by two jacks (35) whose rectilinear movement opens or closes the door (10) by printing on the guided transverse beam (31) an essentially vertical movement along guides (33) of the beam (31).
4. Registre selon l'une quelconque des revendications 1 à 3 caractérisé en ce que la porte (10) est disposée dans sa position fermée vers la chaudière (3) sous un angle incliné par rapport à l'horizontale et que le coin4. Register according to any one of claims 1 to 3 characterized in that the door (10) is arranged in its closed position towards the boiler (3) at an angle inclined relative to the horizontal and that the corner
(40) vers le by-pass est fortement coupé afin de réduire nettement les pertes de charge des fumées en cycle ouvert ainsi que la génération de bruit, consécutives au changement brutal de direction des fumées.(40) towards the bypass is strongly cut in order to significantly reduce the pressure losses of the smoke in the open cycle as well as the generation of noise, following the abrupt change of direction of the smoke.
5. Registre selon l'une quelconque des revendications 1 à 4 caractérisé en que la porte (10) est constituée d'un châssis tubulaire sur lequel sont montées des faces d'étancheité munies chacune de joints d'étancheité simples ou doubles et d'isolation thermique et que les faces sont reliées au châssis par un système souple permettant, de manière connue en soi, les libres dilatations différentielles entre les éléments.5. Register according to any one of claims 1 to 4 characterized in that the door (10) consists of a tubular frame on which are mounted sealing faces each provided with single or double seals and thermal insulation and that the faces are connected to the chassis by a flexible system allowing, in a manner known per se, the free differential expansions between the elements.
6. Registre selon l'une quelconque des revendications 1 à 5 caractérisé en ce que l'étanchéité des tirants au passage du corps, est réalisée par un système de labyrinthe muni ou non de segments d'étancheité, montés sur un système mobile permettant des mouvements transversaux relatifs des tirants par rapport au corps.6. Register according to any one of claims 1 to 5 characterized in that the tightness of the tie rods to the passage of the body is achieved by a labyrinth system provided or not with sealing segments, mounted on a mobile system allowing relative transverse movements of the tie rods relative to the body.
7. Registre selon l'une quelconque des revendications 1 à 6 caractérisé en ce que les paliers de l'arbre support (11) sont réalisés en rotules sphériques.7. Register according to any one of claims 1 to 6 characterized in that the bearings of the support shaft (11) are made of spherical ball joints.
8. Registre selon l'une quelconque des revendications 1 à 7 caractérisé en ce que, de manière classique, le corps du registre est isolé thermiquement, soit intérieurement, soit extérieurement.8. Register according to any one of claims 1 to 7 characterized in that, conventionally, the body of the register is thermally insulated, either internally or externally.
9. Registre selon l'une quelconque des revendications 1 à 8 caractérisé en ce qu'il comporte un système de commande hydraulique muni d'un système de contrôle permettant d'assurer en permanence la manoeuvre parfaitement synchronisée des deux vérins.9. Register according to any one of claims 1 to 8 characterized in that it comprises a hydraulic control system provided with a control system for ensuring permanently the perfectly synchronized operation of the two cylinders.
10. Registre selon l'une quelconque des revendications 1 à 9 caractérisée en ce qu'il est équipé d'une tôle de fermeture intégrée, installée à la sortie du registre en direction de la chaudière et qui assure une étanchéité adéquate aux fumées et à la température. 10. Register according to any one of claims 1 to 9 characterized in that it is equipped with an integrated closing plate, installed at the outlet of the register in the direction of the boiler and which ensures an adequate seal against the fumes and temperature.
PCT/BE1995/000035 1994-04-11 1995-04-11 Fume deflecting damper for combined-cycle power stations WO1995027863A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
PL95316727A PL316727A1 (en) 1994-04-11 1995-04-11 Smoke deflecting throttle for combined cycle power plants
EP95915710A EP0755490A1 (en) 1994-04-11 1995-04-11 Fume deflecting damper for combined-cycle power stations
JP7525985A JPH10503253A (en) 1994-04-11 1995-04-11 Flue gas deflection damper for combined cycle power plant equipment
AU22504/95A AU2250495A (en) 1994-04-11 1995-04-11 Fume deflecting damper for combined-cycle power stations
CZ962995A CZ299596A3 (en) 1994-04-11 1995-04-11 Means for regulating flow of gaseous combustion products in power plants with combined mode of operation
BR9507453A BR9507453A (en) 1994-04-11 1995-04-11 Smoke installation bypass log
FI964015A FI964015A0 (en) 1994-04-11 1996-10-07 Discharge device for combustion gases in a combined plant
NO964322A NO964322L (en) 1994-04-11 1996-10-10 Damper device for dissipating smoke for electric power plants with combined cycle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9400373A BE1008358A3 (en) 1994-04-11 1994-04-11 Deflection register of installation of smoke power stations tell combined cycle.
BE9400373 1994-04-11

Publications (1)

Publication Number Publication Date
WO1995027863A1 true WO1995027863A1 (en) 1995-10-19

Family

ID=3888091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BE1995/000035 WO1995027863A1 (en) 1994-04-11 1995-04-11 Fume deflecting damper for combined-cycle power stations

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Country Link
EP (1) EP0755490A1 (en)
JP (1) JPH10503253A (en)
CN (1) CN1147850A (en)
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PL71094Y1 (en) * 2016-01-29 2019-11-29 Darco Spolka Z Ograniczona Odpowiedzialnoscia By-pass pipe-tee
CN109458278A (en) * 2018-11-02 2019-03-12 安徽江淮汽车集团股份有限公司 The flow adjusting structure of exhaust piping in a kind of egr system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3605811A (en) * 1968-11-14 1971-09-20 United Aircraft Corp Controlled impedance diverter valve
FR2305666A1 (en) * 1975-03-26 1976-10-22 Steege & Janich Kg Hinged cover-plate for smoke duct selection - is moved between two operating positions by rope and pulleys
US4354528A (en) * 1980-12-10 1982-10-19 Uop Inc. Poppet damper with gas flow turning means
WO1988009458A2 (en) * 1987-05-29 1988-12-01 Bachmann Industries, Inc. Gas flow diverter
EP0533282A1 (en) * 1991-09-18 1993-03-24 Philip Rijk Koudijs A discharge system for combustion gases

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3605811A (en) * 1968-11-14 1971-09-20 United Aircraft Corp Controlled impedance diverter valve
FR2305666A1 (en) * 1975-03-26 1976-10-22 Steege & Janich Kg Hinged cover-plate for smoke duct selection - is moved between two operating positions by rope and pulleys
US4354528A (en) * 1980-12-10 1982-10-19 Uop Inc. Poppet damper with gas flow turning means
WO1988009458A2 (en) * 1987-05-29 1988-12-01 Bachmann Industries, Inc. Gas flow diverter
EP0533282A1 (en) * 1991-09-18 1993-03-24 Philip Rijk Koudijs A discharge system for combustion gases

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JPH10503253A (en) 1998-03-24
BR9507453A (en) 1997-08-05
CZ299596A3 (en) 1997-07-16
CA2186589A1 (en) 1995-10-19
CN1147850A (en) 1997-04-16
FI964015A (en) 1996-10-07
HU9602754D0 (en) 1996-11-28
PL316727A1 (en) 1997-02-03
HUT74894A (en) 1997-02-28
NO964322D0 (en) 1996-10-10
EP0755490A1 (en) 1997-01-29
FI964015A0 (en) 1996-10-07
NO964322L (en) 1996-10-11
BE1008358A3 (en) 1996-04-02
AU2250495A (en) 1995-10-30

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