EP0180497A1 - Fluidized-bed apparatus with heat exchanger and with a complementary-air aspiration network - Google Patents

Fluidized-bed apparatus with heat exchanger and with a complementary-air aspiration network Download PDF

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Publication number
EP0180497A1
EP0180497A1 EP85401905A EP85401905A EP0180497A1 EP 0180497 A1 EP0180497 A1 EP 0180497A1 EP 85401905 A EP85401905 A EP 85401905A EP 85401905 A EP85401905 A EP 85401905A EP 0180497 A1 EP0180497 A1 EP 0180497A1
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EP
European Patent Office
Prior art keywords
pipe
tubes
heat exchanger
external pipe
fluidized bed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85401905A
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German (de)
French (fr)
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EP0180497B1 (en
Inventor
Roger Marcel Puff
Jacques Dreuilhe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Charbonnages de France CDF
IFP Energies Nouvelles IFPEN
Areva NP SAS
Original Assignee
Charbonnages de France CDF
IFP Energies Nouvelles IFPEN
Framatome SA
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Application filed by Charbonnages de France CDF, IFP Energies Nouvelles IFPEN, Framatome SA filed Critical Charbonnages de France CDF
Priority to AT85401905T priority Critical patent/ATE36055T1/en
Publication of EP0180497A1 publication Critical patent/EP0180497A1/en
Application granted granted Critical
Publication of EP0180497B1 publication Critical patent/EP0180497B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/06—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air into the fire bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
    • F22B31/0023—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type with tubes in the bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D13/00—Heat-exchange apparatus using a fluidised bed

Definitions

  • Fluidized beds with heat exchangers are already known, particularly in the boiler sector.
  • An exchanger comprises at least two collectors, one at the inlet and one at the outlet of the fluid, between which extend heat exchange tubes.
  • Various arrangements have been proposed for these exchange tubes between the collectors.
  • Horizontal tubes have a larger contact surface with the fluidized bed than vertical tubes, but they are highly prone to erosion and corrosion.
  • Vertical tubes support erosion better than horizontal tubes and inclined tubes; they require a greater density of tubes but they also have the advantage of giving flexibility to the operation since the variation of the height of the fluidized bed makes it possible to significantly modify the height of immersion of these tubes in the fluidized bed.
  • a particularly convenient means for varying the height of the fluidized bed consists in acting on its expansion by means of the change of the fluidization speed by means of a complementary air blowing network independent of the main fluidizing air network. .
  • the outer pipe extends outside the device walls fluidized bed and is connected at its Extremists - Mite highest to the arrival of additional air, preferably at the lowest point of its section, while its lowest end is provided with a purge valve intended to allow the evacuation, when it is deemed desirable, of the ashes which have possibly penetrated into the intermediate volume.
  • the lower manifold 4 comprises an internal pipe 4A which is connected to the circuit 6 and an external pipe 4B which concentrically envelops the internal pipe 4A (FIG. 2) over the entire width of the hearth 3 and preferably up to beyond the walls of this last.
  • the external pipe 4B is provided in its lower part with nozzles 8, spaced apart by a suitable pitch, directed downwards, preferably located on two generators spaced 45 ° from the vertical, as shown Figure 2.
  • the external pipe 4B is connected, at its lowest point in cross section, outside the boiler 1, to an inlet of complementary air 10 comprising a valve for adjusting flow 10A.
  • This extreme part 9 of the external pipe 4B freely crosses, through a larger opening 9A, the wall 5 of the boiler 1 and it is joined to this wall by a flexible expansion joint 9B which provides sealing.
  • the interior pipe 4A ends with a bottom 4C inside the exterior pipe 4B.
  • This external pipe 4B allows the vertical tubes 7 to pass through an opening 11 larger than the external diameter of the latter, which allows them to expand; a conical cap 12, welded to the tube 7 covers the opening 11 to prevent the entry of the ashes by the latter.
  • FIG. 3 shows a variant according to which the external pipe 4B 'is off-center with respect to the interior pipe 4A '; in cross section, the profiles are intersecting and the intermediate volume 14 'has the profile of a crescent.
  • the latter has its largest thickness below the lower generatrix of the inner pipe 4A '; it is therefore further protected downwards whereas in the example illustrated in FIG. 2, it is also protected in all directions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

A fluidized-bed apparatus with a heat exchanger and an additional-air blowing network. The heat exchanger comprises upright tubes extending from a lower header which is slightly inclined to the horizontal, to an upper header. The lower header consists of an internal duct which is connected to the tubes and an external duct which has blowing nozzles and is connected to an additional-air supply line in order to alter the height of the bed in which the upright tubes are immersed.

Description

Appareil à lit fluidisé à échangeur de chaleur et à réseau de soufflage d'air complémentaire.Fluidized bed apparatus with heat exchanger and complementary air supply network.

L'invention a pour objet un appareil à lit fluidisé, par exemple une chaudière pour la combustion en lit fluidisé de charbons en particules fluidisables, dans lequel se trouvent un circuit de tubes faisant partie d'un échangeur de chaleur avec le lit fluidisé et un réseau de soufflage d'air ou de gaz complémentaire indépendant du réseau d'air ou de gaz de fluidisation.The invention relates to a fluidized bed apparatus, for example a boiler for the combustion in a fluidized bed of coals in fluidizable particles, in which there is a circuit of tubes forming part of a heat exchanger with the fluidized bed and a complementary air or gas supply network independent of the air or fluidizing gas network.

On connaît déjà, notamment dans le domaine des chaudières, des lits fluidisés à échangeur de chaleur. Un échangeur comprend au moins deux collecteurs, un à l'arrivée et un à la sortie du fluide, entre lesquels s'étendent des tubes d'échange de chaleur. On a proposé diverses dispositions de ces tubes d'échange entre les collecteurs. Les tubes horizontaux ont une plus grande surface de contact avec le lit fluidisé que les tubes verticaux, mais ils sont fortement sujets à l'érosion et à la corrosion. Les tubes verticaux supportent mieux l'érosion que les tubes horizontaux et que les tubes inclinés ; ils nécessitent une densité plus grande de tubes mais ils ont aussi l'avantage de donner de la souplesse au fonctionnement puisque la variation de la hauteur du lit fluidisé permet de modifier de manière importante la hauteur d'immersion de ces tubes dans le lit fluidisé. Un moyen particulièrement commode pour faire varier la hauteur du lit fluidisé consiste à agir sur son expansion au moyen du changement de la vitesse de fluidisation à l'aide d'un réseau de soufflage d'air complémentaire indépendant du réseau principal d'air de fluidisation.Fluidized beds with heat exchangers are already known, particularly in the boiler sector. An exchanger comprises at least two collectors, one at the inlet and one at the outlet of the fluid, between which extend heat exchange tubes. Various arrangements have been proposed for these exchange tubes between the collectors. Horizontal tubes have a larger contact surface with the fluidized bed than vertical tubes, but they are highly prone to erosion and corrosion. Vertical tubes support erosion better than horizontal tubes and inclined tubes; they require a greater density of tubes but they also have the advantage of giving flexibility to the operation since the variation of the height of the fluidized bed makes it possible to significantly modify the height of immersion of these tubes in the fluidized bed. A particularly convenient means for varying the height of the fluidized bed consists in acting on its expansion by means of the change of the fluidization speed by means of a complementary air blowing network independent of the main fluidizing air network. .

L'invention a pour but principal de parvenir, de manière simple, à un appareil à lit fluidisé, à échangeur de chaleur à tubes verticaux, à réseau de soufflage d'air complémentaire, avec lequel on peut obtenir l'ensemble des avantages rappelés ci-dessus, notamment la souplesse de fonctionnement et la faible érosion ou corrosion des tubes.The main object of the invention is to achieve, in a simple manner, an apparatus with a fluidized bed, with a heat exchanger with vertical tubes, with a complementary air blowing network, with which it is possible to obtain all of the advantages mentioned above. above, in particular the flexibility of operation and the low erosion or corrosion of the tubes.

On parvient à ce résultat, avec un appareil à lit fluidisé à échangeur de chaleur à tubes dressés s'étendant entre un collecteur inférieur et un collecteur supérieur faiblement inclinés sur l'horizontale, à réseau de soufflage d'air complémentaire, grâce au fait que le collecteur inférieur de l'échangeur de chaleur est du type à*double enveloppe composé d'une canalisation intérieure d'où partent les tubes dressés pour la circulation du fluide de l'échangeur et d'une canalisation extérieure, limitant ensemble un volume Intermédiaire qui est raccordé à un réseau de soufflage d'air complémentaire, la canalisation extérieure étant pourvue de buses de sortie d'air convenablement disposées.This is achieved with a fluidized bed apparatus with heat exchanger with upright tubes extending between a lower collector and an upper collector slightly inclined on the horizontal, with complementary air supply network, thanks to the fact that the lower collector of the heat exchanger is of the type with double jacket composed of an internal pipe from which the tubes drawn up for the circulation of the exchanger fluid and an external pipe leave, together limiting an intermediate volume which is connected to a complementary air supply network, the external pipe being provided with outlet nozzles air suitably arranged.

La canalisation extérieure peut être disposée concentriquement à la canalisation intérieure, ce qui procure entre elles un volume annulaire cylindrique ; la canalisation extérieure peut aussi être excentrée par rapport à la canalisation intérieure et peut se raccorder avec elle de manière tangente ou sécante, de sorte que le volume intermédiaire a, en section droite, le profil d'un croissant.The external pipe can be arranged concentrically with the internal pipe, which provides between them an annular cylindrical volume; the external pipe can also be off-center with respect to the internal pipe and can be connected with it tangentially or intersecting, so that the intermediate volume has, in cross section, the profile of a crescent.

Selon un mode de réalisation préféré de l'invention, la canalisation extérieure s'étend en dehors des parois de l'appareil à lit fluidisé et elle est raccordée à son extré- mité la plus élevée à l'arrivée d'air complémentaire, de préférence au point le plus bas de sa section, tandis que son extrémité la moins élevée est munie d'une vanne de purge destinée à permettre l'évacuation, quand on le juge souhaitable, des cendres qui ont pénétré éventuellement dans le volume intermédiaire.According to a preferred embodiment of the invention, the outer pipe extends outside the device walls fluidized bed and is connected at its Extremists - Mite highest to the arrival of additional air, preferably at the lowest point of its section, while its lowest end is provided with a purge valve intended to allow the evacuation, when it is deemed desirable, of the ashes which have possibly penetrated into the intermediate volume.

On donnera maintenant, sans intention limitative-et sans exclure aucune variante, une description d'un exemple de réalisation. On se reportera au dessin annexé dans lequel :

  • - la figure 1 est une représentation schématique en coupe par un plan longitudinal d'un collecteur inférieur à double enveloppe d'une chaudière à lit fluidisé conforme à l'invention,
  • - la figure 2 est une vue en coupe, en section droite selon II-II de la figuré 1,
  • - la figure 3 est une vue en coupe analogue à la figure 2, montrant une variante de réalisation,
  • - la figure 4 est une vue en couoe par un plan vertical de la chambre de fluidisation d'une chaudière équipée de deux échangeurs de chaleur conformes à l'invention.
We will now give, without limiting intention-and without excluding any variant, a description of an exemplary embodiment. Reference is made to the appended drawing in which:
  • FIG. 1 is a diagrammatic representation in section through a longitudinal plane of a lower collector with a double jacket of a fluidized bed boiler according to the invention,
  • FIG. 2 is a sectional view, in cross section along II-II of FIG. 1,
  • FIG. 3 is a sectional view similar to FIG. 2, showing an alternative embodiment,
  • - Figure 4 is a couoe view through a vertical plane of the fluidization chamber of a boiler equipped with two heat exchangers according to the invention.

La figure 1 ne montre qu'une partie de la zone inférieure d'une chaudière 1 à charbon que l'on fait brûler en lit fluidisé au-dessus d'une grille 2 de soufflage d'air principal de fluidisation. Cette grille 2 peut être d'un type quelconque, l'invention étant indépendante de cette grille. A l'intérieur du foyer 3 est installé un échangeur de chaleur qui comprend au moins un collecteur inférieur 4 disposé dans le lit fluidisé à faible distance de la grille 2 avec une légère inclinaison (de 7° par exemple) par rapport à l'horizontale. A son extrémité inférieure qui se trouve en dehors de la paroi 5 du foyer 3, le collecteur 4 est relié à un circuit 6 d'arrivée d'eau. Des tubes verticaux 7 d'échange de chaleur s'étendent à partir du collecteur inférieur 4 jusqu'à au moins un collecteur supérieur (non représenté sur cette figure 1) de départ de vapeur d'eau.FIG. 1 shows only part of the lower zone of a coal-fired boiler 1 which is burned in a fluidized bed above a grid 2 for blowing the main fluidizing air. This grid 2 can be of any type, the invention being independent of this grid. Inside the hearth 3 is installed a heat exchanger which comprises at least one lower collector 4 disposed in the fluidized bed at a short distance from the grid 2 with a slight inclination (of 7 ° for example) relative to the horizontal . At its lower end which is outside the wall 5 of the hearth 3, the collector 4 is connected to a circuit 6 for the water supply. Vertical heat exchange tubes 7 extend from the lower manifold 4 to at least one upper manifold (not shown in this figure 1) for the start of water vapor.

Le collecteur inférieur 4 comprend une canalisation intérieure 4A qui est raccordée au circuit 6 et une canalisation extérieure 4B qui enveloppe concentriquement la canalisation intérieure 4A (figure 2) dans la totalité de la largeur du foyer 3 et de préférence jusqu'au delà des parois de ce dernier. Dans le sens de la longueur, la canalisation extérieure 4B est pourvue dans sa partie inférieure de buses 8, espacées d'un pas convenable, dirigées vers le bas, de préférence situées sur deux génératrices écartées de 45° de la verticale, comme le montre la figure 2.The lower manifold 4 comprises an internal pipe 4A which is connected to the circuit 6 and an external pipe 4B which concentrically envelops the internal pipe 4A (FIG. 2) over the entire width of the hearth 3 and preferably up to beyond the walls of this last. In the lengthwise direction, the external pipe 4B is provided in its lower part with nozzles 8, spaced apart by a suitable pitch, directed downwards, preferably located on two generators spaced 45 ° from the vertical, as shown Figure 2.

A son extrémité 9 la plus élevée qui se trouve aussi en dehors de la paroi 5 de la chaudière 1, la canalisation extérieure 4B est raccordée, à son point le plus bas en section droite, en dehors de la chaudière 1, à une arrivée d'air complémentaire 10 comprenant une vanne de réglage de débit 10A. Cette partie extrême 9 de la canalisation extérieure 4B traverse librement, par une ouverture plus grande 9A, la paroi 5 de la çhaudière 1 et elle est réunie à cette paroi par un joint souple de dilatation 9B qui assure l'étanchéité. La canalisation intérieure 4A se termine par un fond 4C à l'intérieur de la canalisation extérieure 4B.At its highest end 9 which is also outside the wall 5 of the boiler 1, the external pipe 4B is connected, at its lowest point in cross section, outside the boiler 1, to an inlet of complementary air 10 comprising a valve for adjusting flow 10A. This extreme part 9 of the external pipe 4B freely crosses, through a larger opening 9A, the wall 5 of the boiler 1 and it is joined to this wall by a flexible expansion joint 9B which provides sealing. The interior pipe 4A ends with a bottom 4C inside the exterior pipe 4B.

La canalisation extérieure 4B avec ses buses 8 fait partie du réseau de soufflage d'air complémentaire servant à modifier la hauteur d'immersion des tubes 7 ; en même temps, elle permet de protéger la canalisation intérieure 4A du réseau eau/vapeur. En outre, comme elle ne joue aucun rôle pour le transfert thermique, elle peut être protégée contre l'érosion par un traitement ou un revêtement appropriés.The external pipe 4B with its nozzles 8 is part of the complementary air blowing network used to modify the immersion height of the tubes 7; at the same time, it protects the interior pipe 4A of the water / steam network. In addition, since it plays no role for heat transfer, it can be protected against erosion by an appropriate treatment or coating.

Cette canalisation extérieure 4B laisse passer les tubes verticaux 7 par une ouverture 11 plus grande que le diamètre extérieur de ces derniers, ce qui autorise leur dilatation ; un chapeau conique 12,soudé au tube 7 couvre l'ouverture 11 pour empêcher l'entrée des cendres par cette dernière.This external pipe 4B allows the vertical tubes 7 to pass through an opening 11 larger than the external diameter of the latter, which allows them to expand; a conical cap 12, welded to the tube 7 covers the opening 11 to prevent the entry of the ashes by the latter.

Par précaution supplémentaire, l'extrémité inférieure de la canalisation extérieure 4B est munie, à son point le plus bas en section droite, à l'extérieur de la paroi de la chaudière 1, d'une vanne de purge 13A. On peut ainsi évacuer, quand on le juge nécessaire, les cendres qui ont pénétré accidentellement dans le volume intermédiaire 14 inclus entre les canalisations 4A et 4B, en se servant de l'air complémentaire qui vient par l'arrivée 10, sans qu'il soit nécessaire de disposer d'un autre circuit d'air sous pression.As an additional precaution, the lower end of the external pipe 4B is provided, at its lowest point in cross section, outside the wall of the boiler 1, with a purge valve 13A. One can thus evacuate, when it is deemed necessary, the ashes which accidentally entered the intermediate volume 14 included between the pipes 4A and 4B, by using the complementary air which comes through the inlet 10, without it it is necessary to have another pressurized air circuit.

On peut voir sur la figure 2 que lorsque ces canalisations 4A et 4B sont coaxiales, le volume intermédiaire 14 est annulaire et cylindrique. La figure 3 montre une variante selon laquelle la canalisation extérieure 4B' est excentrée par rapport à la canalisation intérieure 4A' ; en section droite, les profils sont sécants et le volume intermédiaire 14' a le profil d'un croissant. Ce dernier a son épaisseur la plus grande en-dessous de la génératrice inférieure de la canalisation intérieure 4A' ; celle-ci est donc protégée davantage vers le bas alors que dans l'exemple illustré par la figure 2, elle est protégée également dans toutes les directions.It can be seen in Figure 2 that when these pipes 4A and 4B are coaxial, the intermediate volume 14 is annular and cylindrical. FIG. 3 shows a variant according to which the external pipe 4B 'is off-center with respect to the interior pipe 4A '; in cross section, the profiles are intersecting and the intermediate volume 14 'has the profile of a crescent. The latter has its largest thickness below the lower generatrix of the inner pipe 4A '; it is therefore further protected downwards whereas in the example illustrated in FIG. 2, it is also protected in all directions.

L'invention est utilisable aussi dans les appareils où les tubes 7 ne sont pas verticaux, mais sont dressés et plus ou moins inclinés.The invention can also be used in devices where the tubes 7 are not vertical, but are raised and more or less inclined.

La figure 4 montre mieux l'intérieur du foyer 3 d'une chaudière 1 dans laquelle sont montés deux échangeurs de chaleur conformes à l'invention, disposés en sens relatifs opposés ; il existe à partir de chaque collecteur inférieur incliné 4 de nombreux tubes verticaux 7 qui aboutissent à un collecteur supérieur 15 incliné parallèlement au collecteur inférieur 4 auquel il est réuni. Chaque collecteur supérieur 15 s'étend en dehors de la chaudière 1 où il est raccordé à une conduite 16 de sortie de vapeur; il est de construction classique connue.Figure 4 better shows the interior of the hearth 3 of a boiler 1 in which are mounted two heat exchangers according to the invention, arranged in opposite relative directions; there are numerous vertical tubes 7 from each inclined lower collector 4 which lead to an upper collector 15 inclined parallel to the lower collector 4 with which it is joined. Each upper manifold 15 extends outside of the boiler 1 where it is connected to a pipe 16 for steam outlet; it is of known conventional construction.

Claims (8)

1. Appareil à lit fluidisé, à échangeur de chaleur ayant au moins un collecteur inférieur (4) légèrement incliné sur l'horizontale, situé dans le lit fluidisé pendant le fonctionnement, à partir duquel s'élèvent des tubes (7) dressés jusqu'à un collecteur supérieur, caractérisé en ce que chaque collecteur inférieur (4) est composé d'une canalisation intérieure (4A) qui est raccordée au circuit de fluide d'échange de chaleur et d'où partent les tubes dressés (7) et d'une canalisation extérieure (4B) raccordée à une arrivée de gaz complémentaire de soufflage et munie de buses de soufflage (8).1. Fluidized bed apparatus, with heat exchanger having at least one lower collector (4) slightly inclined on the horizontal, located in the fluidized bed during operation, from which rise tubes (7) drawn up to an upper manifold, characterized in that each lower manifold (4) is composed of an inner pipe (4A) which is connected to the heat exchange fluid circuit and from which the upright tubes (7) and d '' an external pipe (4B) connected to an additional blowing gas inlet and provided with blowing nozzles (8). 2. Appareil selon la revendication 1, caractérisé en ce que la canalisation extérieure (4B) est disposée co- axialement à la canalisation intérieure (4A).2. Apparatus according to claim 1, characterized in that the external pipe (4B) is arranged coaxially with the internal pipe (4A). 3. Appareil selon la revendication 1, caractérisé en ce que la canalisation extérieure .(4B) est excentrée par rapport à la canalisation intérieure (4A) et se raccorde avec elle de manière tangente ou sécante,.le volume intermédiaire (14') ayant en section droite le profil d'un croissant.3. Apparatus according to claim 1, characterized in that the external pipe (4B) is eccentric with respect to the internal pipe (4A) and is connected with it tangentially or intersecting, the intermediate volume (14 ') having in cross section the profile of a crescent. 4. Appareil selon la revendication 3., caractérisé en ce que le volume intermédiaire (14') a son épaisseur le plus forte en-dessous de la génératrice inférieure de la canalisation intérieure (4A).4. Apparatus according to claim 3., characterized in that the intermediate volume (14 ') has its greatest thickness below the lower generatrix of the inner pipe (4A). 5. Appareil selon la revendication 1, caractérisé en ce que la canalisation extérieure (4B) de chaque collecteur (4) s'étend en dehors des parois de l'appareil et elle est raccordée à son extrémité la plus élevée (9) à l'arrivée de gaz complémentaire (10), de préférence à son point le plus bas dans un plan de coupe en section droite.5. Apparatus according to claim 1, characterized in that the external pipe (4B) of each collector (4) extends outside the walls of the apparatus and it is connected at its highest end (9) to the additional gas inlet (10), preferably at its lowest point in a cross-section plane. 6. Appareil selon la revendication 1, caractérisé en ce que la canalisation extérieure (4B) de chaque collecteur (4) s'étend en dehors des parois de l'appareil et elle est munie à son extrémité la plus basse d'une vanne de purge (13A), de préférence à son point le plus bas dans un plan de coupe en section droite.6. Apparatus according to claim 1, characterized in that the external pipe (4B) of each collector (4) extends outside the walls of the apparatus and is provided at its lowest end with a valve purge (13A), preferably at its lowest point in a cross-section plane. 7. Appareil selon la revendication 1, caractérisé en ce que les buses de soufflage (8) sont situées dans la partie inférieure de la canalisation extérieure (4B).7. Apparatus according to claim 1, characterized in that the blowing nozzles (8) are located in the lower part of the outer pipe (4B). 8. Appareil selon la revendication 7, caractérisé en ce que les buses de soufflage (8) sont situées sur deux génératrices écartées chacune de 45° environ de la verticale.8. Apparatus according to claim 7, characterized in that the blowing nozzles (8) are located on two generators each spaced about 45 ° from the vertical.
EP85401905A 1984-10-02 1985-10-01 Fluidized-bed apparatus with heat exchanger and with a complementary-air aspiration network Expired EP0180497B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401905T ATE36055T1 (en) 1984-10-02 1985-10-01 TEMPLATE SHEET APPARATUS WITH HEAT EXCHANGER AND WITH AN INJECTION NETWORK FOR SECONDARY AIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8415105A FR2571123B1 (en) 1984-10-02 1984-10-02 FLUIDIZED BED APPARATUS WITH HEAT EXCHANGER AND SUPPLEMENTARY AIR SUPPLY NETWORK
FR8415105 1984-10-02

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EP0180497A1 true EP0180497A1 (en) 1986-05-07
EP0180497B1 EP0180497B1 (en) 1988-07-27

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EP85401905A Expired EP0180497B1 (en) 1984-10-02 1985-10-01 Fluidized-bed apparatus with heat exchanger and with a complementary-air aspiration network

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630159A1 (en) * 1986-09-04 1988-03-17 Steinmueller Gmbh L & C Fluidised-bed (vortex) furnace having at least one platen heating surface

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8968431B2 (en) * 2008-06-05 2015-03-03 Synthesis Energy Systems, Inc. Method and apparatus for cooling solid particles under high temperature and pressure

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DE2819996A1 (en) * 1977-05-09 1978-11-23 Chambert Lars Axel Andreas M S METHOD AND REACTOR FOR CARRYING OUT EXOTHERMAL REACTIONS, E.G. COMBUSTION TO GENERATE STEAM, IN A CIRCULATING FLUID
GB2034868A (en) * 1978-10-27 1980-06-11 Smidth & Co As F L Boiler combustion chamber
DE2952091A1 (en) * 1979-12-22 1981-07-02 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Pulverised coal feed for fluidised-bed furnace - distributes coal and air through hollow beams above bed
EP0032798A2 (en) * 1980-01-16 1981-07-29 Devanney, John W. III Fluid bed combustor and process of producing a non-agglomerating vanadium coated particle
DE3027517A1 (en) * 1980-07-19 1982-02-25 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Heat exchanger fluidised-bed firing system - has inflow-permitting grate comprising two sets of vertically relatively movable overlapping strips

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US4335785A (en) * 1980-11-19 1982-06-22 Hodges James L Apparatus and method for controlling heat transfer between a fluidized bed and tubes immersed therein
US4492184A (en) * 1983-10-13 1985-01-08 Exxon Research And Engineering Co. Solids cooling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819996A1 (en) * 1977-05-09 1978-11-23 Chambert Lars Axel Andreas M S METHOD AND REACTOR FOR CARRYING OUT EXOTHERMAL REACTIONS, E.G. COMBUSTION TO GENERATE STEAM, IN A CIRCULATING FLUID
GB2034868A (en) * 1978-10-27 1980-06-11 Smidth & Co As F L Boiler combustion chamber
DE2952091A1 (en) * 1979-12-22 1981-07-02 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Pulverised coal feed for fluidised-bed furnace - distributes coal and air through hollow beams above bed
EP0032798A2 (en) * 1980-01-16 1981-07-29 Devanney, John W. III Fluid bed combustor and process of producing a non-agglomerating vanadium coated particle
DE3027517A1 (en) * 1980-07-19 1982-02-25 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Heat exchanger fluidised-bed firing system - has inflow-permitting grate comprising two sets of vertically relatively movable overlapping strips

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630159A1 (en) * 1986-09-04 1988-03-17 Steinmueller Gmbh L & C Fluidised-bed (vortex) furnace having at least one platen heating surface

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FI853822L (en) 1986-04-03
US4627387A (en) 1986-12-09
FI853822A0 (en) 1985-10-02
DE3564022D1 (en) 1988-09-01
FR2571123B1 (en) 1986-11-28
ATE36055T1 (en) 1988-08-15
FR2571123A1 (en) 1986-04-04
EP0180497B1 (en) 1988-07-27

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