EP0763384A1 - Centrifugal separator, in particular for a circulating fluidized bed boiler - Google Patents

Centrifugal separator, in particular for a circulating fluidized bed boiler Download PDF

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Publication number
EP0763384A1
EP0763384A1 EP96401917A EP96401917A EP0763384A1 EP 0763384 A1 EP0763384 A1 EP 0763384A1 EP 96401917 A EP96401917 A EP 96401917A EP 96401917 A EP96401917 A EP 96401917A EP 0763384 A1 EP0763384 A1 EP 0763384A1
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EP
European Patent Office
Prior art keywords
solid particles
separator according
groove
grooves
separator
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Granted
Application number
EP96401917A
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German (de)
French (fr)
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EP0763384B1 (en
Inventor
Eugène Guilleux
Jean Aubry
Jean-Xavier Morin
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Alstom Power Boiler SA
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GEC Alsthom Stein Industrie
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Publication of EP0763384A1 publication Critical patent/EP0763384A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/081—Shapes or dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations

Definitions

  • the present invention relates to a centrifugal separator for a circulating fluidized bed boiler.
  • the function of the separator is the separation of the phases of the mixture of gases and solid particles suspended in it. A gas vortex is formed creating a centrifugal force in the enclosure of the separator.
  • the efficiency of a separator is linked to the speed of the mixture in the inlet pipe, the internal diameter and the height of the separator which determines the residence time.
  • a high speed can have harmful effects, especially in the case where the mixture has a high concentration of solid particles as in the circulating fluidized beds. Gas at high speed tends, in fact, to re-entrain solid particles already deposited on the wall of the separator and therefore to cause a loss of efficiency.
  • the present invention solves this problem of re-entrainment of solid particles and, to do this, in accordance with the invention, said walls are provided on their internal face with at least one groove for collecting solid particles directed downwards, of depth included. between 1 and 20% of the internal diameter of the upper part and of width between 2 and 10% of the internal perimeter of the upper part.
  • This groove serves on the one hand as a capture groove for solid particles and on the other hand as a guide groove for the collected particles downwards, while protecting them from the gas vortex.
  • the inlet pipe for the mixture of gases and solid particles is tangential to the first wall and, according to the preferred embodiment, the upper end of said groove is disposed opposite this inlet pipe, allowing the direct capture upon entry of a large quantity of solid particles.
  • Said groove can be vertical or inclined at an angle of about 60 ° relative to the vertical.
  • the angle can be variable over the height of the separator.
  • the separator can have several said grooves and these grooves can be distributed around its perimeter or distant from each other by an increasing pitch in the direction of the flow of gas mixture and solid particles.
  • said groove can be partially covered over part of its width by a wall integral with its edge opposite the direction of the flow of gas mixture and solid particles.
  • said groove opens into the outlet pipe for solid particles.
  • said groove can be completely covered by a closure wall in the lower part of the lower part.
  • the invention has the advantage of effecting the separation of solids in two stages, that is to say by gravity drop and centrifugation, which is well suited to CFL boilers where the high loads of solids at the inlet of the separator tend to create a dilute phase overcoming a dense phase on the wall.
  • the dense phase can be immediately separated from the main flow in the inlet of the separator and not disturb the rest of the flow of solids and therefore reduce the retraining.
  • This separation therefore makes it possible to increase the speed field used in the centrifugation and therefore to improve the compactness of the separator.
  • the total width of the grooves is between 5 and 33% of the internal perimeter of the upper part.
  • Figure 1 is a vertical sectional view of a first embodiment of a separator according to the invention.
  • Figure 2 is an elevational view in partial vertical section of a separator of a separator according to the invention according to a second embodiment.
  • Figure 3 is an elevational view in partial vertical section of a separator according to the invention according to a third embodiment.
  • FIG. 4 is a view in horizontal section along III-III of FIG. 1.
  • Figure 5 is a similar sectional view of a fourth embodiment of a separator according to the invention.
  • Figure 6 is a cross-sectional view of a groove.
  • Figure 7 is a sectional view of a fifth embodiment according to the invention.
  • These walls 1A, 2A are provided on their internal face with grooves 6, 7 for collecting solid particles directed downwards, of depth, constant or increasing as they descend, ranging between 1 and 20% of the diameter internal of the upper part 1 and of width, constant or variable, between 2 and 10% of the internal perimeter of the upper part 1.
  • the grooves 6, 7 are vertical.
  • the grooves are inclined at an angle ⁇ less than 60 ° relative to the vertical.
  • the angle may be 45 ° in one area and 0 degrees in another.
  • the grooves 6, 7 start in the first part 1, preferably substantially at the level of the horizontal plane of symmetry of the inlet pipe 3 and open into the outlet pipe 5 solid particles in the lower part of the lower part 2.
  • the grooves 6, 7 are completely covered by a closure wall 14 in the lower part of the lower part 2.
  • a closure wall 14 in the lower part of the lower part 2.
  • they are thus covered over a height substantially equal to half the height of the lower part 2 where the quantity of solid particles in the grooves is large and is therefore completely protected from any re-entrainment and where the small quantity of separated particles can flow along this closure wall 14.
  • the separator may also be provided with outlet orifices 13 for the solid particles arranged along the grooves 6, 7 which constitute intermediate outlets upstream from the conventional outlet pipe 5.
  • the grooves 6 to 9 are spaced from each other by an increasing step in the direction of the flow of gas mixture and solid particles, represented by the arrows. There are four of them here. It is possible to arrange one to eight such grooves, regularly distributed or thus offset, the total width of the grooves being between 5 and 33% of the internal perimeter of the upper part 1.
  • FIG. 5 represents an embodiment of a separator with a single groove 6 ', where the latter has its upper end disposed opposite this inlet pipe 3.
  • the groove 6' n ' is not radial but of transverse axis parallel to the longitudinal axis of the inlet pipe 3.
  • This groove 6 ′ is thus located at the point of impact of the flow of gas mixture and solid particles directly at the outlet of the line 3 where the speed is maximum and the quantity of solid particles separated by centrifugal force also.
  • the groove or grooves 6 are partially covered over part of their width by a wall 10 integral with their edge 6A opposite to the direction of the flow of gas mixture and solid particles.
  • the solid particles are entrained in the groove 6 according to the arrow 11 and are maximum protected there from any re-entrainment by the vortex.
  • the groove or grooves extend over the upper part 1 and over the lower part 2.
  • the cyclone may comprise a number of grooves of one type and a number of grooves of the other type .
  • FIG. 7 represents an embodiment of a separator of octagonal upper section made up only of planar faces 20 connected to each other by grooves 21.
  • the wall consists of cooling tubes 22 internally traversed by a cooling fluid and internally covered with a lining of refractory materials.
  • the separator according to the invention is in particular intended to equip a circulating fluidized bed boiler.

Abstract

The separator consists of an upper section (1) of constant cross-section with an inlet (3) for the mixture of gas and solid particles and an outlet (4) for the gas, and a lower section (2) which tapers towards its lower end, where it has an outlet (5) for the solid particles. The inner surface of the separator walls have at least one groove (6, 7) for trapping the solid particles and guiding them towards the outlet. The depth of each groove is between 1 and 20 per cent of the upper section's inner diameter, and a width of between 2 and 10 per cent of its inner perimeter.

Description

La présente invention se rapporte à un séparateur centrifuge pour chaudière à lit fluidisé circulant.The present invention relates to a centrifugal separator for a circulating fluidized bed boiler.

Elle concerne plus précisément un séparateur de mélange gaz-solides pour chaudière à lit fluidisé circulant comportant

  • une partie supérieure de section sensiblement constante constituée d'une première paroi et comportant en partie haute une conduite d'entrée d'un mélange de gaz et de particules solides et une conduite de sortie du gaz et
  • une partie inférieure de section décroissante vers le bas constituée d'une seconde paroi et comportant en partie basse une conduite de sortie des particules solides.
It relates more precisely to a gas-solid mixture separator for a circulating fluidized bed boiler comprising
  • an upper part of substantially constant section consisting of a first wall and comprising, at the top, an inlet pipe for a mixture of gas and solid particles and an outlet pipe for the gas and
  • a lower part of decreasing section downwards consisting of a second wall and comprising in the lower part an outlet pipe for solid particles.

La fonction du séparateur est la séparation des phases du mélange de gaz et de particules solides en suspension dans celui-ci. Un vortex de gaz est formé créant une force centrifuge dans l'enceinte du séparateur. L'efficacité d'un séparateur est liée à la vitesse du mélange dans la conduite d'entrée, au diamètre interne et à la hauteur du séparateur conditionnant le temps de séjour.The function of the separator is the separation of the phases of the mixture of gases and solid particles suspended in it. A gas vortex is formed creating a centrifugal force in the enclosure of the separator. The efficiency of a separator is linked to the speed of the mixture in the inlet pipe, the internal diameter and the height of the separator which determines the residence time.

Afin de réduire le coût d'un tel séparateur et en particulier d'un séparateur associé à une chaudière à lit fluidisé circulant, l'on peut donc augmenter la vitesse du mélange à l'entrée et dans le corps du séparateur ce qui permet de réduire son diamètre.In order to reduce the cost of such a separator and in particular of a separator associated with a circulating fluidized bed boiler, it is therefore possible to increase the speed of the mixture at the inlet and in the body of the separator, which makes it possible to reduce its diameter.

Cependant, une forte vitesse peut avoir des effets néfastes, surtout dans le cas où le mélange a une forte concentration en particules solides comme dans les lits fluidisés circulants. Le gaz à forte vitesse a tendance, en effet, à réentraîner les particules solides déjà déposés sur la paroi du séparateur et donc à entraîner une perte d'efficacité.However, a high speed can have harmful effects, especially in the case where the mixture has a high concentration of solid particles as in the circulating fluidized beds. Gas at high speed tends, in fact, to re-entrain solid particles already deposited on the wall of the separator and therefore to cause a loss of efficiency.

Une vitesse excessive entraîne de même une augmentation de l'érosion et un accroissement des pertes de charge.Excessive speed likewise leads to an increase in erosion and an increase in pressure losses.

La présente invention résout ce problème de réentraînement des particules solides et, pour ce faire, conformément à l'invention, lesdites parois sont pourvues sur leur face interne d'au moins une rainure de captation des particules solides dirigée vers le bas, de profondeur comprise entre 1 et 20% du diamètre interne de la partie supérieure et de largeur comprise entre 2 et 10 % du périmètre interne de la partie supérieure.The present invention solves this problem of re-entrainment of solid particles and, to do this, in accordance with the invention, said walls are provided on their internal face with at least one groove for collecting solid particles directed downwards, of depth included. between 1 and 20% of the internal diameter of the upper part and of width between 2 and 10% of the internal perimeter of the upper part.

Cette rainure sert d'une part de rainure de captation des particules solides et d'autre part de rainure de guidage des particules captées vers le bas, tout en les protégeant du vortex de gaz.This groove serves on the one hand as a capture groove for solid particles and on the other hand as a guide groove for the collected particles downwards, while protecting them from the gas vortex.

En général la conduite d'entrée du mélange de gaz et de particules solides est tangentielle à la première paroi et, selon le mode de réalisation préféré, l'extrémité supérieure de ladite rainure est disposée en face de cette conduite d'entrée, permettant la captation directe dès l'entrée d'une grande quantité de particules solides.In general, the inlet pipe for the mixture of gases and solid particles is tangential to the first wall and, according to the preferred embodiment, the upper end of said groove is disposed opposite this inlet pipe, allowing the direct capture upon entry of a large quantity of solid particles.

Ladite rainure peut être verticale ou inclinée d'un angle d'environ à 60° par rapport à la verticale.Said groove can be vertical or inclined at an angle of about 60 ° relative to the vertical.

L'angle peut être variable sur la hauteur du séparateur.The angle can be variable over the height of the separator.

Le séparateur peut comporter plusieurs dites rainures et ces rainures peuvent être réparties sur son périmètre ou distantes l'une de l'autre d'un pas croissant dans le sens du flux de mélange de gaz et de particules solides.The separator can have several said grooves and these grooves can be distributed around its perimeter or distant from each other by an increasing pitch in the direction of the flow of gas mixture and solid particles.

Afin d'améliorer cet effet de captation, ladite rainure peut être partiellement recouverte sur une partie de sa largeur par un paroi solidaire de son bord opposé au sens du flux de mélange de gaz et de particules solides.In order to improve this capture effect, said groove can be partially covered over part of its width by a wall integral with its edge opposite the direction of the flow of gas mixture and solid particles.

De préférence, la dite rainure débouche dans la conduite de sortie des particules solides.Preferably, said groove opens into the outlet pipe for solid particles.

Afin de supprimer les réentraînements des particules solides dans la partie inférieure, ladite rainure peut être totalement recouverte par une paroi de fermeture dans la partie basse de la partie inférieure.In order to eliminate the re-entrainments of solid particles in the lower part, said groove can be completely covered by a closure wall in the lower part of the lower part.

L'invention présente l'avantage d'effectuer la séparation des solides en deux étapes, c'est-à-dire par chute gravitaire et centrifugation, ce qui est bien adapté aux chaudières à L.F.C où les charges élevées en solides à l'entrée du séparateur ont tendance à créer une phase diluée surmontant une phase dense en paroi.The invention has the advantage of effecting the separation of solids in two stages, that is to say by gravity drop and centrifugation, which is well suited to CFL boilers where the high loads of solids at the inlet of the separator tend to create a dilute phase overcoming a dense phase on the wall.

La phase dense peut être immédiatement séparée du flux principal dans l'entrée du séparateur et ne pas perturber le reste de l'écoulement des solides et donc diminuer le réentraînement.The dense phase can be immediately separated from the main flow in the inlet of the separator and not disturb the rest of the flow of solids and therefore reduce the retraining.

Cette séparation permet donc d'augmenter le champ de vitesses mis en oeuvre dans la centrifugation et donc d'améliorer la compacité du séparateur.This separation therefore makes it possible to increase the speed field used in the centrifugation and therefore to improve the compactness of the separator.

Ces mode de réalisation peuvent s'appliquer à des séparateurs tubés ou non tubés, de forme circulaire ou polygonale.These embodiments can be applied to cased or uncased separators, of circular or polygonal shape.

La largeur totale des rainures est comprise entre 5 et 33% du périmètre interne de la partie supérieure.The total width of the grooves is between 5 and 33% of the internal perimeter of the upper part.

L'invention est décrite ci-après plus en détail à l'aide de figures ne représentant qu'un mode de réalisation préféré de l'invention.The invention is described below in more detail using figures showing only a preferred embodiment of the invention.

La figure 1 est une vue en coupe verticale d'un premier mode de réalisation d'un séparateur conforme à l'invention.Figure 1 is a vertical sectional view of a first embodiment of a separator according to the invention.

La figure 2 est une vue en élévation en coupe verticale partielle d'un séparateur d'un séparateur conforme à l'invention selon un deuxième mode de réalisation.Figure 2 is an elevational view in partial vertical section of a separator of a separator according to the invention according to a second embodiment.

La figure 3 est une vue en élévation en coupe verticale partielle d'un séparateur conforme à l'invention selon un troisième mode de réalisation.Figure 3 is an elevational view in partial vertical section of a separator according to the invention according to a third embodiment.

La figure 4 est une vue en coupe horizontale selon III-III de la figure 1.FIG. 4 is a view in horizontal section along III-III of FIG. 1.

La figure 5 est une vue en coupe analogue d'un quatrième mode de réalisation d'un séparateur conforme à l'invention.Figure 5 is a similar sectional view of a fourth embodiment of a separator according to the invention.

La figure 6 est une vue en coupe transversale d'une rainure.Figure 6 is a cross-sectional view of a groove.

La figure 7 est une vue en coupe d'un cinquième mode de réalisation conforme à l'invention.Figure 7 is a sectional view of a fifth embodiment according to the invention.

Le séparateur centrifuge représenté dans les figures comporte :

  • une partie supérieure 1 de section sensiblement constante, par exemple cylindrique de section circulaire ou octogonale, constituée d'une première paroi 1A et comportant en partie haute une conduite d'entrée 3 d'un mélange de gaz et de particules solides, en général tangentielle à la première paroi 1A, et une conduite de sortie 4 du gaz constituée en général d'un tube plongeur et
  • une partie inférieure 2 de section décroissante vers le bas, par exemple conique ou prismatique, constituée d'une seconde paroi 2A et comportant en partie basse une conduite de sortie 5 des particules solides, en général verticale.
The centrifugal separator shown in the figures includes:
  • an upper part 1 of substantially constant section, for example cylindrical of circular or octagonal section, consisting of a first wall 1A and comprising in the upper part an inlet pipe 3 of a mixture of gas and solid particles, generally tangential to the first wall 1A, and a gas outlet pipe 4 generally consisting of a dip tube and
  • a lower part 2 of decreasing section downwards, for example conical or prismatic, consisting of a second wall 2A and comprising in the lower part an outlet pipe 5 for solid particles, generally vertical.

Ces parois 1A, 2A sont pourvues sur leur face interne de rainures 6, 7 de captation des particules solides dirigée vers le bas, de profondeur, constante ou croissante au fur et à mesure de leur trajectoire descendante, comprise entre 1 et 20% du diamètre interne de la partie supérieure 1 et de largeur, constante ou variable, comprise entre 2 et 10 % du périmètre interne de la partie supérieure 1.These walls 1A, 2A are provided on their internal face with grooves 6, 7 for collecting solid particles directed downwards, of depth, constant or increasing as they descend, ranging between 1 and 20% of the diameter internal of the upper part 1 and of width, constant or variable, between 2 and 10% of the internal perimeter of the upper part 1.

Selon le mode de réalisation représenté sur la figure 1, les rainures 6, 7 sont verticales.According to the embodiment shown in Figure 1, the grooves 6, 7 are vertical.

Selon le mode de réalisation représenté sur la figure 2 où une seule rainure 6 est représentée dans un but de clarté, les rainures sont inclinées d'un angle α inférieur à 60° par rapport à la verticale. Selon un autre mode de réalisation (figure 3) l'angle peut-être de 45° dans une zone et 0 degrés dans une autre.According to the embodiment shown in Figure 2 where a single groove 6 is shown for clarity, the grooves are inclined at an angle α less than 60 ° relative to the vertical. According to another embodiment (Figure 3) the angle may be 45 ° in one area and 0 degrees in another.

Selon ces modes de réalisation, les rainures 6, 7 commencent dans la première partie 1, de préférence sensiblement au niveau du plan horizontal de symétrie de la conduite d'entrée 3 et débouchent dans la conduite de sortie 5 des particules solides en partie basse de la partie inférieure 2.According to these embodiments, the grooves 6, 7 start in the first part 1, preferably substantially at the level of the horizontal plane of symmetry of the inlet pipe 3 and open into the outlet pipe 5 solid particles in the lower part of the lower part 2.

Les rainures 6, 7 sont totalement recouvertes par une paroi de fermeture 14 dans la partie basse de la partie inférieure 2. Avantageusement, elles sont ainsi recouvertes sur une hauteur sensiblement égale à la moitié de la hauteur de la partie inférieure 2 où la quantité de particules solides dans les rainures est importante et est ainsi totalement protégée de tout réentraînement et où la quantité de particules séparées peu importante peut s'écouler le long de cette paroi de fermeture 14.The grooves 6, 7 are completely covered by a closure wall 14 in the lower part of the lower part 2. Advantageously, they are thus covered over a height substantially equal to half the height of the lower part 2 where the quantity of solid particles in the grooves is large and is therefore completely protected from any re-entrainment and where the small quantity of separated particles can flow along this closure wall 14.

Selon un perfectionnement, le séparateur peut être en plus pourvu d'orifices de sortie 13 des particules solides agencées le long des rainures 6, 7 qui constituent des sorties intermédiaires en amont de la conduite de sortie classique 5.According to an improvement, the separator may also be provided with outlet orifices 13 for the solid particles arranged along the grooves 6, 7 which constitute intermediate outlets upstream from the conventional outlet pipe 5.

Sur la périphérie du séparateur, les rainures 6 à 9, comme représentées sur la figure 4, sont distantes l'une de l'autre d'un pas croissant dans le sens du flux de mélange de gaz et de particules solides, représenté par les flèches. Elles sont ici au nombre de quatre. Il est possible d'aménager une à huit telles rainures, régulièrement réparties ou ainsi décalées, la largeur totale des rainures étant comprise entre 5 et 33% du périmètre interne de la partie supérieure 1.On the periphery of the separator, the grooves 6 to 9, as shown in Figure 4, are spaced from each other by an increasing step in the direction of the flow of gas mixture and solid particles, represented by the arrows. There are four of them here. It is possible to arrange one to eight such grooves, regularly distributed or thus offset, the total width of the grooves being between 5 and 33% of the internal perimeter of the upper part 1.

La figure 5 représente un mode de réalisation d'un séparateur à une seule rainure 6', où celle-ci a son extrémité supérieure disposée en face de cette conduite d'entrée 3. Selon ce mode de réalisation, la rainure 6' n'est pas radiale mais d'axe transversal parallèle à l'axe longitudinal de la conduite d'entrée 3. Cette rainure 6' est ainsi localisée au point d'impact du flux de mélange de gaz et de particules solides directement à la sortie de la conduite 3 là où la vitesse est maximale et la quantité de particules solides séparées par force centrifuge également.FIG. 5 represents an embodiment of a separator with a single groove 6 ', where the latter has its upper end disposed opposite this inlet pipe 3. According to this embodiment, the groove 6' n ' is not radial but of transverse axis parallel to the longitudinal axis of the inlet pipe 3. This groove 6 ′ is thus located at the point of impact of the flow of gas mixture and solid particles directly at the outlet of the line 3 where the speed is maximum and the quantity of solid particles separated by centrifugal force also.

Selon un perfectionnement représenté sur la figure 6, la ou les rainures 6 sont partiellement recouvertes sur une partie de leur largeur par une paroi 10 solidaire de leur bord 6A opposé au sens du flux de mélange de gaz et de particules solides. Lors du vortex du flux de mélange de gaz et de particules solides schématisé par la flèche 12, les particules solides sont entraînées dans la rainure 6 selon la flèche 11 et y sont au maximum protégées de tout réentraînement par le vortex.According to an improvement shown in FIG. 6, the groove or grooves 6 are partially covered over part of their width by a wall 10 integral with their edge 6A opposite to the direction of the flow of gas mixture and solid particles. During the vortex of the flow of gas and solid particles mixture shown diagrammatically by the arrow 12, the solid particles are entrained in the groove 6 according to the arrow 11 and are maximum protected there from any re-entrainment by the vortex.

Selon les modes de réalisation décrits, la ou les rainures s'étendent sur la partie supérieure 1 et sur la partie inférieure 2. Le cyclone peut comprendre un certain nombre de rainures d'un type et un certain nombre de rainures de l'autre type.According to the embodiments described, the groove or grooves extend over the upper part 1 and over the lower part 2. The cyclone may comprise a number of grooves of one type and a number of grooves of the other type .

La figure 7 représente un mode de réalisation d'un séparateur de section supérieure octogonale constitué uniquement de faces planes 20 raccordées entre elles par des rainures 21.FIG. 7 represents an embodiment of a separator of octagonal upper section made up only of planar faces 20 connected to each other by grooves 21.

La paroi est constitué de tubes de refroidissement 22 parcourus intérieurement par un fluide de refroidissement et recouverts intérieurement d'un garnissage de matériaux réfractaires.The wall consists of cooling tubes 22 internally traversed by a cooling fluid and internally covered with a lining of refractory materials.

Le séparateur conforme à l'invention est en particulier destiné à équiper une chaudière à lit fluidisé circulant.The separator according to the invention is in particular intended to equip a circulating fluidized bed boiler.

Claims (12)

Séparateur de mélanges gaz-solides pour chaudière à lit fluidisé circulant comportant - une partie supérieure (1) de section sensiblement constante constituée d'une première paroi (1A) et comportant en partie haute une conduite d'entrée (3) d'un mélange de gaz et de particules solides et une conduite de sortie (4) du gaz et - une partie inférieure (2) de section décroissante vers le bas constituée d'une seconde paroi (2A) et comportant en partie basse une conduite de sortie (5) des particules solides,    caractérisé en ce que lesdites parois (1A, 2A) sont pourvues sur leur face interne d'au moins une rainure (6 à 9) de captation des particules solides dirigée vers le bas, de profondeur comprise entre 1 et 20% du diamètre interne de la partie supérieure (1) et de largeur comprise entre 2 et 10 % du périmètre interne de la partie supérieure (1).Separator for gas-solid mixtures for a circulating fluidized bed boiler comprising - an upper part (1) of substantially constant section consisting of a first wall (1A) and comprising in the upper part an inlet pipe (3) of a mixture of gases and solid particles and an outlet pipe (4 ) gas and a lower part (2) of decreasing downward section consisting of a second wall (2A) and comprising in the lower part an outlet pipe (5) for solid particles, characterized in that said walls (1A, 2A) are provided on their internal face with at least one groove (6 to 9) for collecting solid particles directed downwards, with a depth between 1 and 20% of the internal diameter of the upper part (1) and of width between 2 and 10% of the internal perimeter of the upper part (1). Séparateur selon la revendication 1, dont la conduite d'entrée (3) du mélange de gaz et de particules solides est tangentielle à la première paroi (1A), caractérisé en ce que l'extrémité supérieure de ladite rainure est disposée en face de cette conduite d'entrée (3).Separator according to claim 1, the inlet pipe (3) of the mixture of gases and solid particles is tangential to the first wall (1A), characterized in that the upper end of said groove is arranged opposite this inlet pipe (3). Séparateur selon la revendication 1 ou 2, caractérisé en ce que ladite rainure est verticale.Separator according to claim 1 or 2, characterized in that said groove is vertical. Séparateur selon la revendication 1 ou 2, caractérisé en ce que ladite rainure est inclinée d'un angle (α) inférieur à 60° par rapport à la verticale.Separator according to claim 1 or 2, characterized in that said groove is inclined at an angle (α) less than 60 ° relative to the vertical. Séparateur selon l'une des revendications précédentes, caractérisé en ce que ladite rainure (6') est partiellement recouverte sur une partie de sa largeur par une paroi (10) solidaire de son bord (6A) opposé au sens du flux de mélange de gaz et de particules solides.Separator according to one of the preceding claims, characterized in that said groove (6 ') is partially covered over part of its width by a wall (10) integral with its edge (6A) opposite the direction of the flow of gas mixture and solid particles. Séparateur selon l'une des revendications précédentes, caractérisé en ce que la dite rainure débouche dans la conduite (5) de sortie des particules solides.Separator according to one of the preceding claims, characterized in that said groove opens into the outlet pipe (5) for solid particles. Séparateur selon la revendication 6, caractérisés en ce que ladite rainure est totalement recouverte par une paroi de fermeture (14) dans la partie basse de la partie inférieure (2).Separator according to claim 6, characterized in that said groove is completely covered by a closure wall (14) in the lower part of the lower part (2). Séparateur selon l'une des revendications précédentes, caractérisé en ce qu'il comporte plusieurs dites rainures (6 à 9).Separator according to one of the preceding claims, characterized in that it comprises several said grooves (6 to 9). Séparateur selon la revendication 8, caractérisé en ce que lesdites rainures sont réparties sur son périmètre.Separator according to claim 8, characterized in that said grooves are distributed around its perimeter. Séparateur selon la revendication 8, caractérisé en ce que lesdites rainures sont distantes l'une de l'autre d'un pas croissant dans le sens du flux de mélange de gaz et de particules solides.Separator according to claim 8, characterized in that said grooves are spaced from each other by an increasing pitch in the direction of the flow of gas mixture and solid particles. Séparateur selon l'une des revendications 8 à 10, caractérisé en ce que la largeur totale des rainures est comprise entre 5 et 33% du périmètre interne de la partie supérieure (1).Separator according to one of claims 8 to 10, characterized in that the total width of the grooves is between 5 and 33% of the internal perimeter of the upper part (1). Séparateur selon la revendication 1, caractérisé en ce que la partie supérieure est constituée de faces planes (20) disposées de manière à constituer une section octogonale, lesdites faces étant raccordées entre elles par des rainures (21).Separator according to claim 1, characterized in that the upper part consists of planar faces (20) arranged so as to constitute an octagonal section, said faces being connected together by grooves (21).
EP96401917A 1995-09-15 1996-09-09 Centrifugal separator, in particular for a circulating fluidized bed boiler Expired - Lifetime EP0763384B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9510845A FR2738758B1 (en) 1995-09-15 1995-09-15 CENTRIFUGAL SEPARATOR IN PARTICULAR FOR A CIRCULATING FLUIDIZED BED BOILER
FR9510845 1995-09-15

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EP0763384A1 true EP0763384A1 (en) 1997-03-19
EP0763384B1 EP0763384B1 (en) 2000-05-10

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CN (1) CN1100586C (en)
AT (1) ATE192672T1 (en)
DE (1) DE69608194T2 (en)
DK (1) DK0763384T3 (en)
ES (1) ES2147906T3 (en)
FR (1) FR2738758B1 (en)
RU (1) RU2163514C2 (en)

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EP1020229A1 (en) * 1999-01-18 2000-07-19 ABB Alstom Power Combustion Smoke inlet conduct for a cyclone
EP1020228A1 (en) * 1999-01-18 2000-07-19 ABB Alstom Power Combustion Smoke inlet conduct for a cyclone
EP1308213A1 (en) * 2001-10-30 2003-05-07 Alstom (Switzerland) Ltd A centrifugal separator, in particular for a fluidized bed reactor device
WO2016005655A1 (en) * 2014-07-09 2016-01-14 Amec Foster Wheeler Energia Oy Particle separator assembly connectable to a fluidized bed reactor and a fluidized bed reactor
WO2019064427A1 (en) * 2017-09-28 2019-04-04 三菱電機株式会社 Oil separator and air conditioner with same
CN109894287A (en) * 2019-04-03 2019-06-18 清华大学 A kind of scroll casing type efficient cyclone

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DE102004022311B4 (en) * 2004-05-04 2006-12-28 Daimlerchrysler Ag Moisture exchange module with a bundle of moisture permeable hollow fiber membranes
DE102004022245B4 (en) * 2004-05-04 2012-06-28 Daimler Ag Fuel cell system and method for its operation
DE102004022312B4 (en) * 2004-05-04 2009-04-16 Daimler Ag Moisture exchange module with a bundle of moisture permeable hollow fiber membranes
FR2988307B1 (en) 2012-03-26 2014-03-21 Coutier Moulage Gen Ind CYCLONE SEPARATOR
CN105806668A (en) * 2014-12-30 2016-07-27 杜晨光 Small-flow atmospheric particulate cutting device
CN112691798B (en) * 2019-10-22 2022-11-15 中国石油化工股份有限公司 Cyclone separator, application method thereof and fluidized bed reactor

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1020229A1 (en) * 1999-01-18 2000-07-19 ABB Alstom Power Combustion Smoke inlet conduct for a cyclone
EP1020228A1 (en) * 1999-01-18 2000-07-19 ABB Alstom Power Combustion Smoke inlet conduct for a cyclone
FR2788454A1 (en) * 1999-01-18 2000-07-21 Alstom SMOKE INLET SHEATH IN A CYCLONE SEPARATOR
FR2788453A1 (en) * 1999-01-18 2000-07-21 Alstom SMOKE INLET SHEATH IN A CYCLONE SEPARATOR
US6258146B1 (en) 1999-01-18 2001-07-10 Abb Alstom Power Combustion Inlet duct for admitting flue gases into a cyclone separator
US6322601B1 (en) 1999-01-18 2001-11-27 Abb Alstom Power Combustion Cyclone separator smoke inlet trunking
US6938780B2 (en) 2001-10-30 2005-09-06 Alstom (Switzerland) Ltd. Centrifugal separator in particular for fluidized bed reactor device
WO2003037524A1 (en) * 2001-10-30 2003-05-08 Alstom (Switzerland) Ltd A centrifugal separator, in particular for a fluidized bed reactor device
EP1308213A1 (en) * 2001-10-30 2003-05-07 Alstom (Switzerland) Ltd A centrifugal separator, in particular for a fluidized bed reactor device
WO2016005655A1 (en) * 2014-07-09 2016-01-14 Amec Foster Wheeler Energia Oy Particle separator assembly connectable to a fluidized bed reactor and a fluidized bed reactor
KR20160027229A (en) * 2014-07-09 2016-03-09 아멕 포스터 휠러 에너지아 오와이 Particle separator assembly connectable to a fluidized bed reactor and a fluidized bed reactor
JP2016531726A (en) * 2014-07-09 2016-10-13 エイメック フォスター ウィーラー エナージア オサケ ユキチュア Particle separator assembly connectable to fluidized bed reactor and fluidized bed reactor
KR101700074B1 (en) 2014-07-09 2017-01-26 아멕 포스터 휠러 에너지아 오와이 Particle separator assembly connectable to a fluidized bed reactor and a fluidized bed reactor
US9604229B2 (en) 2014-07-09 2017-03-28 Amec Foster Wheeler Energia Oy Particle separator assembly connectable to a fluidized bed reactor and a fluidized bed reactor
WO2019064427A1 (en) * 2017-09-28 2019-04-04 三菱電機株式会社 Oil separator and air conditioner with same
JPWO2019064427A1 (en) * 2017-09-28 2020-10-22 三菱電機株式会社 Oil separator and air conditioner equipped with it
CN109894287A (en) * 2019-04-03 2019-06-18 清华大学 A kind of scroll casing type efficient cyclone

Also Published As

Publication number Publication date
ATE192672T1 (en) 2000-05-15
CN1151000A (en) 1997-06-04
CN1100586C (en) 2003-02-05
ES2147906T3 (en) 2000-10-01
FR2738758A1 (en) 1997-03-21
DK0763384T3 (en) 2000-10-09
FR2738758B1 (en) 1998-03-13
DE69608194D1 (en) 2000-06-15
RU2163514C2 (en) 2001-02-27
DE69608194T2 (en) 2000-12-14
EP0763384B1 (en) 2000-05-10

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