EP1020229A1 - Smoke inlet conduct for a cyclone - Google Patents

Smoke inlet conduct for a cyclone Download PDF

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Publication number
EP1020229A1
EP1020229A1 EP00400087A EP00400087A EP1020229A1 EP 1020229 A1 EP1020229 A1 EP 1020229A1 EP 00400087 A EP00400087 A EP 00400087A EP 00400087 A EP00400087 A EP 00400087A EP 1020229 A1 EP1020229 A1 EP 1020229A1
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EP
European Patent Office
Prior art keywords
cyclone
face
point
sheath
nose
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Granted
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EP00400087A
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German (de)
French (fr)
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EP1020229B1 (en
Inventor
Jean-Claude Semedard
Eugène Guilleux
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Alstom Power Boiler SA
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ABB Alstom Power Combustion
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
    • 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
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets
    • 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

Definitions

  • the present invention relates to a flue inlet duct in a separator cyclone.
  • the invention applies in particular, although not limited to, large installations, for example from 250 to 600 MW, which include several cyclone separators placed side by side at the exit of the fireplace.
  • large installations for example from 250 to 600 MW, which include several cyclone separators placed side by side at the exit of the fireplace.
  • the arrangement of the inlet sheath of a cyclone separator at the outlet of a hearth is that shown in fig. 1 where we see schematically in top view the cyclone separator 1 with its inlet sheath 2 at the outlet from the hearth 3.
  • This inlet sheath has two lateral faces 4 and 5, one face of floor and ceiling face not visible in this view.
  • Face 4 is called the lower face and face 5 the upper face. For reasons size, it is very common for the lower surface to make an acute angle ⁇ with respect to the exit face of the room.
  • Document us 5,771,844 shows a cyclone separator in which the sheath inlet 12 extends inside the hearth and in which the lower face 13 of the duct entry is curved in its first part, internal to the foyer.
  • the present invention proposes to improve the efficiency of such cyclone separators by special provisions of the inlet sheath.
  • the subject of the invention is therefore a flue inlet duct in a separator cyclone, said sheath comprising two lateral faces, one of which is called the upper surface and the other underside, the latter leading to the nose of cyclone D, a ceiling face and a floor face, said underside face which connects the point S of duct start to point D of the nose of the cyclone having a profile such that it comprises at least two distinct tangents such that one T intersects the upper surface at a point A located upstream of the foot B of the perpendicular to the upper surface conducted from the nose D of the cyclone, characterized in that said lower surface begins from said point S by a first part having a rectilinear profile R, followed by a second part with a curvilinear profile V with inflection point or of a second rectilinear part joining the nose D of the cyclone, said point S being located at the start of the focus.
  • the lower surface has inclined grooves down from the fireplace outlet to the cyclone separator. This provision that we can also be applied on the upper surface to promote the transfer of solid particles in the inlet sheath towards the bottom of the cyclone.
  • the ceiling face of the inlet duct forms a hump constituting a profile comprising, in the direction of the length of the sheath from the exit from the hearth towards the entry of the cyclone, a first descending part followed by a part rising.
  • said bump is such that the narrowing of height in each section of the duct is greater on the lower side than on the upper side.
  • FIG. 2 we see a cyclone separator 1 connected to the outlet smoke from a hearth 3 through an inlet duct 2.
  • This figure shows the two lateral faces of the sheath 2: the face 4A, called the lower face and the face 5, called the upper face.
  • the lower surface 4A begins, at point S of departure from focus 3, by a rectilinear part R followed by a curvilinear part V comprising a point inflection point 6.
  • the tangent to the inflection point 6 intersects the upper surface 5 at point A located upstream from point B, foot of the perpendicular ⁇ to the upper surface conducted from the nose D of the cyclone.
  • This arrangement makes it possible to have a first zone 7 for handling particles. solids, followed by a solid direction change zone 8.
  • Fig. 3 shows a variant of the invention in which the lower face 4B starts from said point S, as in fig. 2, by a first part having a rectilinear profile R followed by a second part 4B1 also rectilinear and joining the nose D cyclone 1.
  • the extension of the first part with the straight profile R cuts the upper surface 5 in one point A located upstream of point B, foot of the perpendicular to the upper surface 5 conducted from the nose D of the cyclone.
  • Fig. 5 is simply a simplified sketch showing the entry section of the fumes in the duct 2 in the direction of the arrow F in FIG. 4 and making it possible to identify the four faces of the duct 2: lower face 4A, 4B, upper face 5, ceiling face 10 and face 11.
  • the inclined grooves 9, shown diagrammatically in FIG. 4, are performed on the face upper surface 5 but can also be on the lower surface 4A, 4B.
  • These grooves 9 are inclined at an angle between 5 and 25 ° relative to the horizontal.
  • Fig. 6 is a diagram showing the section of the grooves. They have advantageously a height h of between 200 and 400 mm and a lower depth at 50 mm, and they are separated by solid parts 12 with a height h1 between 100 and 300 mm.
  • figs. 7 and 8 show an arrangement taken on the ceiling face 10 of so that the solid particles, on the one hand, come off the ceiling 13 of the cyclone and, on the other hand, migrate, from the ceiling, from the lower surface 4A, 4B towards the upper surface 5 like the shows arrow 14 (fig. 8), thus favoring, on the one hand the gravity separation and on the other hand lengthening the centrifugation radius of solid particles.
  • This arrangement consists, as can be seen in the two figs. 7 and 8 in a bump ceiling 15.
  • This bump 15 constitutes a three-dimensional left profile causing in the direction of the length of the sheath 2, as shown in fig. 7, first, at the outlet of the hearth 3, a contraction of the sheath section then an expansion of the section before entry in cyclone 1.
  • the bump 15, asymmetrical reduces the height of passage in the duct from the upper surface 5 towards the lower surface 4A, 4B.
  • the hump 15 has a longitudinal slope (fig. 7) less than 20% over a length of 5 m, i.e. 1 m of bump height. In the sense transverse, fig. 8, the transition is gradual between the reduced height ceiling side lower surface 4 and upper surface side 5 at non-reducing height.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Cyclones (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Abstract

The cyclonic separator (1) comprises an entry collar (2) that is inclined away from the cyclonic rotation. The collar has a flat rear lateral face (5) and an inclined front lateral face (4A). The frontal face includes an indented section (8) that has a curved sidewall structure (V). The indent forms a constriction at the opening to the cyclonic separator.

Description

La présente invention concerne une gaine d'entrée de fumées dans un séparateur cyclone.The present invention relates to a flue inlet duct in a separator cyclone.

L'invention s'applique en particulier, bien que non limitativement, aux grosses installations, par exemple de 250 à 600 MW, qui comportent plusieurs séparateurs cyclones placés côte à côte à la sortie du foyer. Dans de telles installations, la place manque pour placer correctement la gaine d'entrée des séparateurs à cause de l'encombrement dû au passage de diverses poutres. Ainsi, classiquement, la disposition de la gaine d'entrée d'un séparateur cyclone à la sortie d'un foyer est celle représentée fig. 1 où l'on voit schématiquement en vue de dessus le séparateur cyclone 1 avec sa gaine d'entrée 2 à la sortie du foyer 3. Cette gaine d'entrée comporte deux faces latérales 4 et 5, une face de plancher et une face de plafond non visibles sur cette vue.The invention applies in particular, although not limited to, large installations, for example from 250 to 600 MW, which include several cyclone separators placed side by side at the exit of the fireplace. In such installations, there is insufficient space for correctly place the separator inlet sheath because of the space due to passage of various beams. Thus, conventionally, the arrangement of the inlet sheath of a cyclone separator at the outlet of a hearth is that shown in fig. 1 where we see schematically in top view the cyclone separator 1 with its inlet sheath 2 at the outlet from the hearth 3. This inlet sheath has two lateral faces 4 and 5, one face of floor and ceiling face not visible in this view.

La face 4 est appelée face intrados et la face 5 face extrados. Pour des raisons d'encombrement, il est très fréquent que la face intrados fasse un angle α aigu par rapport à la face de sortie de la chambre.Face 4 is called the lower face and face 5 the upper face. For reasons size, it is very common for the lower surface to make an acute angle α with respect to the exit face of the room.

Cette disposition de gaine qui résulte, comme il a été dit de l'encombrement, n'est pas favorable à une bonne efficacité du séparateur.This sheath arrangement which results, as has been said from the bulk, is not not favorable to good efficiency of the separator.

En effet, compte tenu de l'inclinaison selon un angle aigu α de la face intrados 4, les particules solides des fumées en sortie du foyer 3 sont en grande partie récoltées par cette face, ce qui les concentre et les envoie en grande partie sur le nez D du cyclone où leur centrifugation insuffisante les laisse s'échapper vers l'orifice de la jupe de captation du vortex.Indeed, taking into account the inclination at an acute angle α of the lower surface 4, the solid particles of the fumes leaving the hearth 3 are largely collected by this face, which concentrates them and sends them largely on the nose D of the cyclone where their insufficient centrifugation lets them escape towards the orifice of the capture skirt of the vortex.

Le document us 5 771 844 montre un séparateur cyclone dans lequel la gaine d'entrée 12 se prolonge à l'intérieur du foyer et dans lequel la face intrados 13 de la gaine d'entrée est incurvée dans sa première partie, interne au foyer.Document us 5,771,844 shows a cyclone separator in which the sheath inlet 12 extends inside the hearth and in which the lower face 13 of the duct entry is curved in its first part, internal to the foyer.

La présente invention propose d'améliorer l'efficacité de tels séparateurs cyclones par des dispositions particulières de la gaine d'entrée.The present invention proposes to improve the efficiency of such cyclone separators by special provisions of the inlet sheath.

L'invention a ainsi pour objet une gaine d'entrée de fumées dans un séparateur cyclone, ladite gaine comportant deux faces latérales dont l'une est appelée face extrados et l'autre face intrados, cette dernière aboutissant au nez du cyclone D, une face de plafond et une face de plancher, ladite face intrados qui relie le point S de début de gaine au point D du nez du cyclone ayant un profil tel qu'il comporte au moins deux tangentes distinctes telles que l'une T coupe l'extrados en un point A situé en amont du pied B de la perpendiculaire à l'extrados menée du nez D du cyclone, caractérisé en ce que ladite face intrados commence à partir dudit point S par une première partie ayant un profil rectiligne R, suivi d'une seconde partie ayant un profil curviligne V à point d'inflexion ou bien d'une seconde partie rectiligne rejoignant le nez D du cyclone, ledit point S étant situé au départ du foyer.The subject of the invention is therefore a flue inlet duct in a separator cyclone, said sheath comprising two lateral faces, one of which is called the upper surface and the other underside, the latter leading to the nose of cyclone D, a ceiling face and a floor face, said underside face which connects the point S of duct start to point D of the nose of the cyclone having a profile such that it comprises at least two distinct tangents such that one T intersects the upper surface at a point A located upstream of the foot B of the perpendicular to the upper surface conducted from the nose D of the cyclone, characterized in that said lower surface begins from said point S by a first part having a rectilinear profile R, followed by a second part with a curvilinear profile V with inflection point or of a second rectilinear part joining the nose D of the cyclone, said point S being located at the start of the focus.

Selon une autre caractéristique, la face intrados comporte des rainures inclinées vers le bas depuis la sortie du foyer vers le séparateur cyclone. Cette disposition que l'on peut appliquer également sur la face extrados a pour but de favoriser le transfert des particules solides dans la gaine d'entrée vers le bas du cyclone.According to another characteristic, the lower surface has inclined grooves down from the fireplace outlet to the cyclone separator. This provision that we can also be applied on the upper surface to promote the transfer of solid particles in the inlet sheath towards the bottom of the cyclone.

Selon une autre caractéristique, la face de plafond de la gaine d'entrée forme une bosse constituant un profil comportant, dans le sens de la longueur de la gaine depuis la sortie du foyer vers l'entrée du cyclone, une première partie descendante suivie d'une partie montante.According to another characteristic, the ceiling face of the inlet duct forms a hump constituting a profile comprising, in the direction of the length of the sheath from the exit from the hearth towards the entry of the cyclone, a first descending part followed by a part rising.

Selon une autre caractéristique, ladite bosse est telle que le rétrécissement de hauteur dans chaque section de la gaine est plus important côté intrados que côté extrados.According to another characteristic, said bump is such that the narrowing of height in each section of the duct is greater on the lower side than on the upper side.

L'invention va maintenant être décrite en se reportant au dessin annexé dans lequel :

  • La fig. 1, déjà commentée, représente schématiquement la disposition de l'art antérieur.
  • La fig. 2 est une vue schématique d'un séparateur cyclone comportant une gaine d'entrée selon l'invention et montrant en particulier le profil de la face intrados.
  • La fig. 3 montre isolément la gaine d'entrée selon une variante.
  • Les fig. 4, 5 et 6 sont trois vues schématiques permettant de voir une disposition complémentaire prise sur la face intrados et éventuellement sur la face extrados, de la gaine, en complément de la disposition prise sur la face intrados montrée fig. 2 ou 3.
  • Les fig. 7 et 8 sont deux vues schématiques permettant de voir une disposition complémentaire prise sur la face de plafond de la gaine d'entrée, la fig. 7 montrant la gaine d'entrée longitudinalement et la fig. 8 montrant une section transversale.
    • The invention will now be described with reference to the accompanying drawing in which:
  • Fig. 1, already commented on, schematically represents the arrangement of the prior art.
  • Fig. 2 is a schematic view of a cyclone separator comprising an inlet sheath according to the invention and showing in particular the profile of the lower surface.
  • Fig. 3 shows the inlet sheath in isolation according to a variant.
  • Figs. 4, 5 and 6 are three schematic views making it possible to see a complementary arrangement taken on the lower surface and possibly on the upper surface of the sheath, in addition to the arrangement taken on the lower surface shown in FIG. 2 or 3.
  • Figs. 7 and 8 are two schematic views showing a complementary arrangement taken on the ceiling face of the inlet sheath, FIG. 7 showing the inlet sheath longitudinally and FIG. 8 showing a cross section.

    • Ainsi, en se reportant à la fig. 2, on voit un séparateur cyclone 1 relié à la sortie fumées d'un foyer 3 par une gaine d'entrée 2. Cette figure montre les deux faces latérales de la gaine 2: la face 4A, dite face intrados et la face 5, dite face extrados.Thus, referring to FIG. 2, we see a cyclone separator 1 connected to the outlet smoke from a hearth 3 through an inlet duct 2. This figure shows the two lateral faces of the sheath 2: the face 4A, called the lower face and the face 5, called the upper face.

    Conformément à l'invention, la face intrados 4A débute, au point S de départ du foyer 3, par une partie rectiligne R suivie d'une partie curviligne V comportant un point d'inflexion 6. La tangente au point d'inflexion 6 coupe l'extrados 5 au point A situé en amont du point B, pied de la perpendiculaire Δ à l'extrados menée à partir du nez D du cyclone. Cette disposition permet d'avoir une première zone 7 de prise en charge des particules solides, suivie d'une zone 8 de changement de direction des solides. In accordance with the invention, the lower surface 4A begins, at point S of departure from focus 3, by a rectilinear part R followed by a curvilinear part V comprising a point inflection point 6. The tangent to the inflection point 6 intersects the upper surface 5 at point A located upstream from point B, foot of the perpendicular Δ to the upper surface conducted from the nose D of the cyclone. This arrangement makes it possible to have a first zone 7 for handling particles. solids, followed by a solid direction change zone 8.

    La fig. 3 montre une variante de l'invention dans laquelle la face intrados 4B commence à partir dudit point S, comme dans la fig. 2, par une première partie ayant un profil rectiligne R suivie d'une seconde partie 4B1 également rectiligne et rejoignant le nez D du cyclone 1.Fig. 3 shows a variant of the invention in which the lower face 4B starts from said point S, as in fig. 2, by a first part having a rectilinear profile R followed by a second part 4B1 also rectilinear and joining the nose D cyclone 1.

    La prolongation de la première partie au profil rectiligne R coupe l'extrados 5 en un point A situé en amont du point B, pied de la perpendiculaire à l'extrados 5 menée à partir du nez D du cyclone.The extension of the first part with the straight profile R cuts the upper surface 5 in one point A located upstream of point B, foot of the perpendicular to the upper surface 5 conducted from the nose D of the cyclone.

    Ainsi, grâce au profil de la face intrados 4A fig. 2 ou 4B fig. 3, les particules solides des fumées sortant du foyer 3 sont renvoyées sur la face extrados 5 à l'entrée du cyclone, on bénéficie ainsi du rayon maximal de centrifugation.Thus, thanks to the profile of the lower surface 4A FIG. 2 or 4B fig. 3, solid particles smoke leaving the hearth 3 is returned to the upper surface 5 at the entrance to the cyclone, thus benefits from the maximum centrifugation radius.

    Outre cette disposition, conforme aux fig. 2 et 3, il est avantageux de prévoir, particulièrement sur la face intrados 4A, 4B, mais aussi sur la face extrados 5, des rainures 9, comme le montre la fig. 4 qui représente schématiquement le séparateur cyclone 1 avec se gaine d'entrée 2 en élévation. Ces rainures 9 sont inclinées vers le bas depuis la sortie du foyer vers le séparateur cyclone 1. Cette disposition a pour but de favoriser la séparation gravitaire à l'entrée du cyclone.In addition to this arrangement, in accordance with figs. 2 and 3, it is advantageous to provide, particularly on the lower surface 4A, 4B, but also on the upper surface 5, grooves 9, as shown in fig. 4 which schematically represents the cyclone separator 1 with input sheath 2 in elevation. These grooves 9 are inclined downwards from the outlet of the focus towards the cyclone separator 1. The purpose of this arrangement is to promote separation gravity at the entrance of the cyclone.

    La fig. 5 est simplement un croquis simplifié montrant la section d'entrée des fumées dans la gaine 2 dans le sens de la flèche F de la fig. 4 et permettant de repérer les quatre faces de la gaine 2 : face intrados 4A, 4B, face extrados 5, face de plafond 10 et face de plancher 11.Fig. 5 is simply a simplified sketch showing the entry section of the fumes in the duct 2 in the direction of the arrow F in FIG. 4 and making it possible to identify the four faces of the duct 2: lower face 4A, 4B, upper face 5, ceiling face 10 and face 11.

    Les rainures inclinées 9, schématisées sur la fig. 4, sont effectuées sur la face extrados 5 mais peuvent l'être également sur la face intrados 4A, 4B.The inclined grooves 9, shown diagrammatically in FIG. 4, are performed on the face upper surface 5 but can also be on the lower surface 4A, 4B.

    Ces rainures 9 sont inclinées d'un angle compris entre 5 et 25° par rapport à l'horizontale.These grooves 9 are inclined at an angle between 5 and 25 ° relative to the horizontal.

    La fig. 6 est un schéma montrant la section des rainures. Elles ont avantageusement une hauteur h comprise entre 200 et 400 mm et une profondeur inférieure à 50 mm, et elles sont séparées par des parties pleines 12 d'une hauteur h1 comprise entre 100 et 300 mm.Fig. 6 is a diagram showing the section of the grooves. They have advantageously a height h of between 200 and 400 mm and a lower depth at 50 mm, and they are separated by solid parts 12 with a height h1 between 100 and 300 mm.

    Enfin, les fig. 7 et 8 montrent une disposition prise sur la face de plafond 10 de manière à ce que les particules solides, d'une part, se décollent du plafond 13 du cyclone et, d'autre part, migrent, en plafond, de la face intrados 4A, 4B vers la face extrados 5 comme le montre la flèche 14 (fig. 8), favorisant ainsi, d'une part la séparation gravitaire et d'autre part allongeant le rayon de centrifugation des particules solides.Finally, figs. 7 and 8 show an arrangement taken on the ceiling face 10 of so that the solid particles, on the one hand, come off the ceiling 13 of the cyclone and, on the other hand, migrate, from the ceiling, from the lower surface 4A, 4B towards the upper surface 5 like the shows arrow 14 (fig. 8), thus favoring, on the one hand the gravity separation and on the other hand lengthening the centrifugation radius of solid particles.

    Cette disposition consiste, comme on le voit sur les deux fig. 7 et 8 dans une bosse de plafond 15. This arrangement consists, as can be seen in the two figs. 7 and 8 in a bump ceiling 15.

    Cette bosse 15 constitue un profil gauche en trois dimensions provoquant dans le sens de la longueur de la gaine 2, comme le montre la fig. 7, d'abord, en sortie du foyer 3, une contraction de la section de la gaine puis une expansion de la section avant l'entrée dans le cyclone 1.This bump 15 constitutes a three-dimensional left profile causing in the direction of the length of the sheath 2, as shown in fig. 7, first, at the outlet of the hearth 3, a contraction of the sheath section then an expansion of the section before entry in cyclone 1.

    Par ailleurs, dans le sens transversal, comme le montre la fig. 8 correspondant par exemple à la section VIII - VIII de la fig. 7, la bosse 15, dissymétrique, réduit la hauteur de passage dans la gaine depuis la face extrados 5 vers la face intrados 4A, 4B.Furthermore, in the transverse direction, as shown in fig. 8 correspondent by example in section VIII - VIII of fig. 7, the bump 15, asymmetrical, reduces the height of passage in the duct from the upper surface 5 towards the lower surface 4A, 4B.

    Par exemple, pour un séparateur cyclone ayant un diamètre de 10 m, une hauteur de 25 m et une hauteur de gaine de 4 m, la bosse 15 a longitudinalement (fig. 7) une pente inférieure à 20 % sur une longueur de 5 m, soit 1 m de hauteur de bosse. Dans le sens transversal, fig. 8, la transition est progressive entre le plafond à hauteur réduite côté intrados 4 et côté extrados 5 à hauteur non réduire.For example, for a cyclone separator with a diameter of 10 m, a height 25 m and a sheath height of 4 m, the hump 15 has a longitudinal slope (fig. 7) less than 20% over a length of 5 m, i.e. 1 m of bump height. In the sense transverse, fig. 8, the transition is gradual between the reduced height ceiling side lower surface 4 and upper surface side 5 at non-reducing height.

    Claims (5)

    Gaine d'entrée (2) de fumées dans un séparateur cyclone (1), ladite gaine comportant deux faces latérales (4A, 4B, 5) dont l'une est appelée face extrados (5) et l'autre face intrados (4A, 4B), cette dernière aboutissant au nez du cyclone D, une face de plafond (10) et une face de plancher (11), ladite face intrados (4A, 4B) qui relie le point S de début de gaine au point D du nez du cyclone ayant un profil tel qu'il comporte au moins deux tangentes distinctes telles que l'une T coupe l'extrados (5) en un point A situé en amont du pied B de la perpendiculaire à l'extrados menées du nez D du cyclone, caractérisée en ce que ladite face intrados (4A, 4B) commence à partir dudit point S par une première partie ayant un profil rectiligne R, suivi d'une seconde partie ayant un profil curviligne V à point d'inflexion (6) ou bien d'une seconde partie rectiligne (4B1) rejoignant le nez D du cyclone, ledit point S étant situé au départ du foyer.Inlet duct (2) for smoke in a cyclone separator (1), said duct comprising two lateral faces (4A, 4B, 5) one of which is called the upper surface (5) and the other lower surface (4A, 4B), the latter leading to the nose of cyclone D, a ceiling face (10) and a floor face (11), said underside face (4A, 4B) which connects the point S at the start of sheath at point D of the nose of the cyclone having a profile such that it comprises at least two distinct tangents such that one T intersects the upper surface (5) at a point A located upstream of the foot B of the perpendicular to the extrados carried from the nose D of the cyclone, characterized in that that said lower surface (4A, 4B) begins from said point S with a first part having a rectilinear profile R, followed by a second part having a curvilinear profile V at point inflection (6) or else a second rectilinear part (4B1) joining the nose D of the cyclone, said point S being located at the start of the foyer. Gaine selon la revendication 1, caractérisée en ce que la face intrados (4A, 4B) comporte des rainures (9) inclinées vers le bas depuis la sortie du foyer vers le séparateur cyclone (1).Sheath according to claim 1, characterized in that the lower surface (4A, 4B) has grooves (9) inclined downwards from the outlet of the hearth towards the separator cyclone (1). Gaine selon l'une des revendications 1 ou 2, caractérisée en ce que la face extrados (5) comporte des rainures (9) inclinées vers le bas depuis la sortie du foyer vers le séparateur cyclone (1).Sheath according to one of claims 1 or 2, characterized in that the face upper surface (5) has grooves (9) inclined downwards from the outlet of the hearth towards the cyclone separator (1). Gaine selon l'une des revendications précédentes, caractérisée par le fait que ladite face de plafond forme une bosse constituant un profil comportant, dans le sens de la longueur de la gaine (fig. 7) depuis la sortie du foyer vers l'entrée du cyclone, une première partie descendante suivie d'une partie montante.Sheath according to one of the preceding claims, characterized in that said ceiling face forms a bump constituting a profile comprising, in the direction of the length of the sheath (fig. 7) from the outlet of the hearth towards the inlet of the cyclone, a first descending part followed by a rising part. Gaine selon la revendication 4, caractérisée en ce que ladite bosse est telle que le rétrécissement de hauteur dans chaque section de la gaine est plus important côté intrados (4A, 4B) que côté extrados (5).Sheath according to claim 4, characterized in that said hump is such that the height narrowing in each section of the duct is more important on the lower side (4A, 4B) than on the upper side (5).
    EP00400087A 1999-01-18 2000-01-13 Smoke inlet conduct for a cyclone Expired - Lifetime EP1020229B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9900464 1999-01-18
    FR9900464A FR2788453B1 (en) 1999-01-18 1999-01-18 SMOKE INLET SHEATH IN A CYCLONE SEPARATOR

    Publications (2)

    Publication Number Publication Date
    EP1020229A1 true EP1020229A1 (en) 2000-07-19
    EP1020229B1 EP1020229B1 (en) 2008-10-01

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    ID=9540955

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00400087A Expired - Lifetime EP1020229B1 (en) 1999-01-18 2000-01-13 Smoke inlet conduct for a cyclone

    Country Status (7)

    Country Link
    US (1) US6322601B1 (en)
    EP (1) EP1020229B1 (en)
    CN (1) CN1140315C (en)
    AT (1) ATE409524T1 (en)
    DE (1) DE60040355D1 (en)
    ES (1) ES2313874T3 (en)
    FR (1) FR2788453B1 (en)

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    WO2002067756A1 (en) * 2001-02-24 2002-09-06 Dyson Ltd Cyclonic separating apparatus
    EP2431096A1 (en) 2010-09-17 2012-03-21 Alstom Technology Ltd Cyclone separator
    EP2213377A4 (en) * 2007-11-30 2015-11-18 Mitsubishi Heavy Ind Ltd Powder separation device and solid-fuel burner

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    KR100619785B1 (en) * 2005-05-16 2006-09-06 엘지전자 주식회사 Oil seperator
    DE102009050165A1 (en) 2009-10-21 2011-04-28 Outotec Oyj Device for the treatment of solids and / or gases
    GB2499620B (en) * 2012-02-21 2019-05-22 Caltec Production Solutions Ltd Fluid separator
    CN103398375B (en) * 2013-07-01 2016-01-13 中国华能集团清洁能源技术研究院有限公司 With the cyclone separator of circulating fluidized bed boiler of wear-resisting target area and guider
    DE102013112977B4 (en) * 2013-11-25 2015-08-06 Pfannenberg Gmbh Air passage device for supplying purified air into an interior of a control cabinet and control cabinet with such an air passage device
    CN104100968B (en) * 2014-07-25 2016-03-30 中国华能集团清洁能源技术研究院有限公司 A kind of cyclone separator of circulating fluidized bed boiler with integral inclined central tube
    US10219672B2 (en) 2015-12-15 2019-03-05 The Clorox Company Multilayer cleaning article with gripping layer and dry surface contact layer
    DE202016102924U1 (en) 2016-06-01 2017-09-04 Outotec (Finland) Oy Cyclone for separating particles from a fluid
    CN108499750B (en) * 2017-02-27 2019-12-20 松下知识产权经营株式会社 Separating device
    CA3174436A1 (en) * 2020-03-06 2021-09-10 Metso Outotec Finland Oy Cyclone separator arrangement

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    EP0284184A1 (en) * 1987-03-25 1988-09-28 F.L. Smidth & Co. A/S Cyclone
    EP0494650A2 (en) * 1991-01-11 1992-07-15 Emtrol Corporation Method and apparatus for separating particulate material from hot gas
    EP0763384A1 (en) * 1995-09-15 1997-03-19 GEC ALSTHOM Stein Industrie Centrifugal separator, in particular for a circulating fluidized bed boiler
    US5771844A (en) * 1996-04-04 1998-06-30 Foster Wheeler Development Corp. Cyclone separator having increased gas flow capacity

    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2002067756A1 (en) * 2001-02-24 2002-09-06 Dyson Ltd Cyclonic separating apparatus
    EP2213377A4 (en) * 2007-11-30 2015-11-18 Mitsubishi Heavy Ind Ltd Powder separation device and solid-fuel burner
    EP2431096A1 (en) 2010-09-17 2012-03-21 Alstom Technology Ltd Cyclone separator
    US9486727B2 (en) 2010-09-17 2016-11-08 General Electric Technology Gmbh Cyclone separator

    Also Published As

    Publication number Publication date
    FR2788453B1 (en) 2001-02-23
    DE60040355D1 (en) 2008-11-13
    ATE409524T1 (en) 2008-10-15
    EP1020229B1 (en) 2008-10-01
    CN1264609A (en) 2000-08-30
    US6322601B1 (en) 2001-11-27
    FR2788453A1 (en) 2000-07-21
    ES2313874T3 (en) 2009-03-16
    CN1140315C (en) 2004-03-03

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