EP1020229B1 - Smoke inlet conduct for a cyclone - Google Patents

Smoke inlet conduct for a cyclone Download PDF

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Publication number
EP1020229B1
EP1020229B1 EP00400087A EP00400087A EP1020229B1 EP 1020229 B1 EP1020229 B1 EP 1020229B1 EP 00400087 A EP00400087 A EP 00400087A EP 00400087 A EP00400087 A EP 00400087A EP 1020229 B1 EP1020229 B1 EP 1020229B1
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EP
European Patent Office
Prior art keywords
face
cyclone
extrados
intrados
duct
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EP00400087A
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German (de)
French (fr)
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EP1020229A1 (en
Inventor
Jean-Claude Semedard
Eugène Guilleux
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Alstom Power Boiler SA
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Alstom Power Boiler SA
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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 fume inlet duct in a cyclone separator.
  • the invention applies in particular, although not exclusively, to large installations, for example from 250 to 600 MW, which comprise several cyclone separators placed side by side at the exit of the hearth.
  • large installations for example from 250 to 600 MW, which comprise several cyclone separators placed side by side at the exit of the hearth.
  • space is lacking to correctly position the inlet duct of the separators because of the space requirement due to the passage of various beams.
  • the provision of the inlet duct of a cyclone separator at the outlet of a furnace is that shown Fig. 1 where schematically seen in view from above the cyclone separator 1 with its inlet sheath 2 at the outlet of the hearth 3.
  • This inlet sheath has two side faces 4 and 5, a floor face and a ceiling face not visible on this view.
  • the face 4 is called the intrados face and the face 5 face extrados. For reasons of space, it is very common for the intrados face to make an acute angle ⁇ with respect to the outlet face of the chamber.
  • US 5,771,844 discloses a cyclone separator in which the inlet sheath 12 extends into the interior of the furnace and wherein the intrados face 13 of the inlet sheath is curved in its first part, internal to the furnace.
  • the present invention proposes to improve the efficiency of such cyclone separators by particular provisions of the inlet sheath.
  • the subject of the invention is thus a fume inlet sheath in a cyclone separator, said sheath comprising two lateral faces, one of which is called the extrados face and the other intrados face, the latter leading to the nose of the cyclone D, a ceiling face and a floor face, said intrados face which connects the starting point of sheath S to the point D of the nose of the cyclone having a profile such that it comprises at least two distinct tangents such as one T cut the extrados at a point A located upstream of the foot B of the perpendicular to the extrados led nose of the cyclone, characterized in that said intrados face begins from said point S by a first portion having a rectilinear profile R, followed by 'a second part having a curvilinear profile V inflection point or a second straight portion joining the nose D cyclone, said point S being located at the start of the outbreak.
  • the intrados face comprises grooves inclined downwards from the outlet of the hearth to the cyclone separator. This provision that can also be applied to the extrados face is intended to promote the transfer of solid particles in the inlet duct down the cyclone.
  • the ceiling face of the inlet duct forms a hump constituting a profile comprising, in the direction of the length of the duct from the outlet of the hearth to the inlet of the cyclone, a first descending portion followed by a rising party.
  • said hump is such that the height shrinkage in each section of the sheath is greater on the lower side than the extrados side.
  • a cyclone separator 1 connected to the smoke outlet of a furnace 3 by an inlet duct 2.
  • This figure shows the two lateral faces of the sheath 2: the face 4A, called the intrados face and the face 5, so-called extrados face.
  • the intrados face 4A starts at the starting point S of the hearth 3 by a rectilinear portion R followed by a curvilinear portion V having a point of inflection 6.
  • the tangent to the point of inflection 6 section the extrados 5 at point A located upstream of point B, foot of the perpendicular ⁇ to the extrados conducted from the nose D of the cyclone.
  • the Fig. 3 shows a variant of the invention in which the intrados face 4B starts from said point S, as in the Fig. 2 by a first portion having a rectilinear profile R followed by a second portion 4B1 also rectilinear and joining the nose D of cyclone 1.
  • the extension of the first portion to the rectilinear profile R intersects the upper surface 5 at a point A upstream of the point B, the foot of the perpendicular to the extrados 5 conducted from the nose D of the cyclone.
  • FIG. Fig. 4 which schematically represents the cyclone separator 1 with inlet duct 2 in elevation. These grooves 9 are inclined downwards from the outlet of the hearth to cyclone separator 1. This provision is intended to promote gravity separation at the entrance of the cyclone.
  • the Fig. 5 is simply a simplified sketch showing the fumes inlet section in sheath 2 in the direction of arrow F of the Fig. 4 and making it possible to locate the four faces of the sheath 2: intrados face 4A, 4B, extrados face 5, ceiling face 10 and floor face 11.
  • the inclined grooves 9, schematized on the Fig. 4 are performed on the extrados face 5 but can also be on the intrados face 4A, 4B.
  • These grooves 9 are inclined at an angle of between 5 and 25 ° relative to the horizontal.
  • the Fig. 6 is a diagram showing the section of the grooves. They advantageously have a height h of between 200 and 400 mm and a depth of less than 50 mm, and they are separated by solid portions 12 with a height h1 of between 100 and 300 mm.
  • Fig. 7 and 8 show a disposition taken on the ceiling face 10 so that the solid particles, on the one hand, are detached from the roof 13 of the cyclone and, on the other hand, migrate, on the ceiling, from the intrados face 4A, 4B towards the upper surface 5 as shown by the arrow 14 ( Fig. 8 ), thus favoring, on the one hand, the gravitational separation and, on the other hand, lengthening the centrifugation radius of the solid particles.
  • This hump 15 constitutes a three-dimensional left profile causing in the direction of the length of the sheath 2, as shown in FIG. Fig. 7 first, at the outlet of the hearth 3, a contraction of the section of the sheath and then an expansion of the section before entering the cyclone 1.
  • the bump 15, asymmetrical reduces the passage height in the sheath from the extrados face 5 to the intrados face 4A, 4B.
  • the boss 15 has longitudinally ( Fig. 7 ) a slope of less than 20% over a length of 5 m, or 1 m of bump height.
  • Fig. 8 the transition is progressive between the ceiling reduced height side intrados 4 and extrados side 5 to height not reduce.

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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 fume inlet duct in a cyclone separator.

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 exclusively, to large installations, for example from 250 to 600 MW, which comprise several cyclone separators placed side by side at the exit of the hearth. In such installations, space is lacking to correctly position the inlet duct of the separators because of the space requirement due to the passage of various beams. Thus, conventionally, the provision of the inlet duct of a cyclone separator at the outlet of a furnace is that shown Fig. 1 where schematically seen in view from above the cyclone separator 1 with its inlet sheath 2 at the outlet of the hearth 3. This inlet sheath has two side faces 4 and 5, a floor face and a ceiling face not visible on 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.The face 4 is called the intrados face and the face 5 face extrados. For reasons of space, it is very common for the intrados face to make an acute angle α with respect to the outlet face of the chamber.

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 cladding arrangement which results, as has been said of the size, is not favorable to a 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, given the inclination at an acute angle α of the intrados face 4, the solid particles of the fumes at the outlet of the hearth 3 are largely harvested by this face, which concentrates them and sends them largely on nose D cyclone where their insufficient centrifugation allows them to escape to the orifice of the vortex capture skirt.

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.US 5,771,844 discloses a cyclone separator in which the inlet sheath 12 extends into the interior of the furnace and wherein the intrados face 13 of the inlet sheath is curved in its first part, internal to the furnace.

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 particular 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 thus a fume inlet sheath in a cyclone separator, said sheath comprising two lateral faces, one of which is called the extrados face and the other intrados face, the latter leading to the nose of the cyclone D, a ceiling face and a floor face, said intrados face which connects the starting point of sheath S to the point D of the nose of the cyclone having a profile such that it comprises at least two distinct tangents such as one T cut the extrados at a point A located upstream of the foot B of the perpendicular to the extrados led nose of the cyclone, characterized in that said intrados face begins from said point S by a first portion having a rectilinear profile R, followed by 'a second part having a curvilinear profile V inflection point or a second straight portion joining the nose D cyclone, said point S being located at the start of the outbreak.

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 intrados face comprises grooves inclined downwards from the outlet of the hearth to the cyclone separator. This provision that can also be applied to the extrados face is intended to promote the transfer of solid particles in the inlet duct down 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 duct from the outlet of the hearth to the inlet of the cyclone, a first descending portion followed by a rising party.

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 hump is such that the height shrinkage in each section of the sheath is greater on the lower side than the extrados 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:
  • The Fig. 1 , already commented, schematically represents the arrangement of the prior art.
  • The Fig. 2 is a schematic view of a cyclone separator comprising an inlet duct according to the invention and showing in particular the profile of the intrados face.
  • The Fig. 3 shows separately the inlet sheath according to a variant.
  • The Fig. 4, 5 and 6 are three schematic views to see a complementary arrangement taken on the intrados face and possibly on the extrados face of the sheath, in addition to the arrangement taken on the intrados face shown Fig. 2 or 3 .
  • The Fig. 7 and 8 are two schematic views to see a complementary arrangement taken on the ceiling face of the inlet duct, the Fig. 7 showing the inlet duct longitudinally and the 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.So, referring to the Fig. 2 , we see a cyclone separator 1 connected to the smoke outlet of a furnace 3 by an inlet duct 2. This figure shows the two lateral faces of the sheath 2: the face 4A, called the intrados face and the face 5, so-called extrados 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.According to the invention, the intrados face 4A starts at the starting point S of the hearth 3 by a rectilinear portion R followed by a curvilinear portion V having a point of inflection 6. The tangent to the point of inflection 6 section the extrados 5 at point A located upstream of point B, foot of the perpendicular Δ to the extrados conducted from the nose D of the cyclone. This arrangement makes it possible to have a first zone 7 for handling solid particles, followed by a zone 8 for changing direction of the solids.

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.The Fig. 3 shows a variant of the invention in which the intrados face 4B starts from said point S, as in the Fig. 2 by a first portion having a rectilinear profile R followed by a second portion 4B1 also rectilinear and joining the nose D of 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 portion to the rectilinear profile R intersects the upper surface 5 at a point A upstream of the point B, the foot of the perpendicular to the extrados 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 intrados face 4A Fig. 2 or 4B Fig. 3 the solid particles of the fumes leaving the furnace 3 are returned to the extrados face 5 at the inlet of the cyclone, thus benefiting from the maximum radius of centrifugation.

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 provision, in accordance with Fig. 2 and 3 , it is advantageous to provide, particularly on the intrados face 4A, 4B, but also on the extrados face 5, grooves 9, as shown in FIG. Fig. 4 which schematically represents the cyclone separator 1 with inlet duct 2 in elevation. These grooves 9 are inclined downwards from the outlet of the hearth to cyclone separator 1. This provision is intended to promote gravity separation 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.The Fig. 5 is simply a simplified sketch showing the fumes inlet section in sheath 2 in the direction of arrow F of the Fig. 4 and making it possible to locate the four faces of the sheath 2: intrados face 4A, 4B, extrados face 5, ceiling face 10 and floor 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, schematized on the Fig. 4 , are performed on the extrados face 5 but can also be on the intrados face 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 of 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.The Fig. 6 is a diagram showing the section of the grooves. They advantageously have a height h of between 200 and 400 mm and a depth of less than 50 mm, and they are separated by solid portions 12 with a height h1 of 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, Fig. 7 and 8 show a disposition taken on the ceiling face 10 so that the solid particles, on the one hand, are detached from the roof 13 of the cyclone and, on the other hand, migrate, on the ceiling, from the intrados face 4A, 4B towards the upper surface 5 as shown by the arrow 14 ( Fig. 8 ), thus favoring, on the one hand, the gravitational separation and, on the other hand, lengthening the centrifugation radius of the solid particles.

Cette disposition consiste, comme on le voit sur les deux fig. 7 et 8 dans une bosse de plafond 15.This provision consists, as we see on both Fig. 7 and 8 in a ceiling bump 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 hump 15 constitutes a three-dimensional left profile causing in the direction of the length of the sheath 2, as shown in FIG. Fig. 7 first, at the outlet of the hearth 3, a contraction of the section of the sheath and then an expansion of the section before entering the 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.Moreover, in the transverse direction, as shown in Fig. 8 corresponding, for example, to section VIII - VIII of the Fig. 7 , the bump 15, asymmetrical, reduces the passage height in the sheath from the extrados face 5 to the intrados face 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 having a diameter of 10 m, a height of 25 m and a height of sheath 4 m, the boss 15 has longitudinally ( Fig. 7 ) a slope of less than 20% over a length of 5 m, or 1 m of bump height. In the transverse direction, Fig. 8 , the transition is progressive between the ceiling reduced height side intrados 4 and extrados side 5 to height not reduce.

Claims (5)

  1. Flue gas inlet duct (2) in a cyclone separator (1), said duct comprising two side faces (4A, 4B, 5), of which one is referred to as the extrados face (5) and the other is referred to as the intrados face (4A, 4B), the latter ending at the tip of the cyclone D, a top face (10) and a bottom face (11), said intrados face (4A, 4B) which connects the starting point S of the duct to the point D at the tip of the cyclone having a profile such that it comprises at least two distinct tangents so that one T intersects the extrados (5) at a point A located upstream of the foot B of the perpendicular to the extrados taken from the tip D of the cyclone, characterised in that said intrados face (4A, 4B) starts from said point S by a first part having a rectilinear profile R, followed by a second part having a curved profile V with a point of inflection (6) or else by a second rectilinear part (4B1) which meets the tip D of the cyclone, said point S being located at the exit from the furnace.
  2. Duct according to claim 1, characterised in that the intrados face (4A, 4B) has grooves (9) inclined downwards from the outlet of the furnace towards the cyclone separator (1).
  3. Duct according to one of claims 1 or 2, characterised in that the extrados face (5) has grooves (9) inclined downwards from the outlet of the furnace towards the cyclone separator (1).
  4. Duct according to one of the preceding claims, characterised in that said top face forms a boss constituting a profile which comprises, in the length direction of the duct (Fig. 7) from the outlet of the furnace towards the inlet of the cyclone, a descending first part followed by an ascending part.
  5. Duct according to claim 4, characterised in that said boss is such that the reduction in height in each section of the duct is greater on the intrados side (4A, 4B) than on the extrados 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 EP1020229A1 (en) 2000-07-19
EP1020229B1 true EP1020229B1 (en) 2008-10-01

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

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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
KR100619785B1 (en) * 2005-05-16 2006-09-06 엘지전자 주식회사 Oil seperator
JP5260034B2 (en) * 2007-11-30 2013-08-14 三菱重工業株式会社 Powder separator and solid fuel burner
DE102009050165A1 (en) 2009-10-21 2011-04-28 Outotec Oyj Device for the treatment of solids and / or gases
EP2431096B1 (en) 2010-09-17 2013-12-25 Alstom Technology Ltd Cyclone separator
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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AT334475B (en) * 1972-12-06 1976-01-25 Hejlek Ing Franz DEVICE FOR CONTINUOUS ENRICHMENT OF GASEOUS ISOTOPES OF HEAVY ELEMENTS
IT1212056B (en) * 1985-01-22 1989-11-08 Carrol Noel CYCLONE SEPARATOR
GB2202468A (en) * 1987-03-25 1988-09-28 Smidth & Co As F L Cyclone
JPH0538408A (en) * 1991-08-06 1993-02-19 Mitsubishi Heavy Ind Ltd Gas-liquid separation apparatus
US5122171A (en) * 1991-01-11 1992-06-16 Emtrol Corporation Apparatus for separating particulate material from hot gas
FR2738758B1 (en) * 1995-09-15 1998-03-13 Gec Alsthom Stein Ind 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

Also Published As

Publication number Publication date
FR2788453B1 (en) 2001-02-23
DE60040355D1 (en) 2008-11-13
ATE409524T1 (en) 2008-10-15
CN1264609A (en) 2000-08-30
EP1020229A1 (en) 2000-07-19
US6322601B1 (en) 2001-11-27
FR2788453A1 (en) 2000-07-21
ES2313874T3 (en) 2009-03-16
CN1140315C (en) 2004-03-03

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