EP1056904A2 - Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier - Google Patents

Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier

Info

Publication number
EP1056904A2
EP1056904A2 EP99927569A EP99927569A EP1056904A2 EP 1056904 A2 EP1056904 A2 EP 1056904A2 EP 99927569 A EP99927569 A EP 99927569A EP 99927569 A EP99927569 A EP 99927569A EP 1056904 A2 EP1056904 A2 EP 1056904A2
Authority
EP
European Patent Office
Prior art keywords
bowl centrifuge
solid bowl
rotor
centrifuge according
separation space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP99927569A
Other languages
German (de)
English (en)
Inventor
Albert M. Huber
Joachim Ch. Huber
Wolfgang A. Huber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1056904A2 publication Critical patent/EP1056904A2/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/22—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in apparatus with a vertical axis

Definitions

  • Solid bowl centrifuge for mixtures, especially for fiber suspensions in the paper industry
  • the invention relates to a solid bowl centrifuge for multiphase mixtures, in particular three-phase mixtures, and to a solid bowl centrifuge for multiphase mixtures in general, which is intended in particular for fiber suspensions in the paper industry.
  • a solid bowl centrifuge is intended for example for three-phase mixtures, in particular for fiber suspensions in the paper industry, which has a housing, a rotor for separating the three-phase mixture into a light, medium and heavy fraction and at least one opening in the rotor shell for the heavy fraction.
  • a solid-bowl centrifuge for mixtures, in particular for fiber suspensions in the paper industry has a housing and a rotor, the outer body, like the housing, usually executing a rotary movement.
  • Such a solid jacket centrifuge which is used, for example, as a cleaner for material suspensions, is known from EP-A-0 501 134.
  • This device can separate both a light fraction and a heavy fraction.
  • a pump-like inlet blading is provided, which is followed by a multiple-stage diffuser.
  • depressions are provided on the outlet-side end of the inner cylinder, which open into discharge channels in the inner cylinder.
  • a collecting groove is provided at least before the outlet blading, from which openings lead to the outside. The stream of cleaned suspensions sion as the middle fraction is led out via the turbine-like outlet blading.
  • WO92 / 00810 describes a rotating separation device and a method for rotating separation of a mixture.
  • This device comprises an axially arranged tube and a container which surrounds the axial tube to form a separation chamber, the tube and the container rotating.
  • the mixture to be separated is directed over the circumference of the separation chamber with the aid of flow guide elements.
  • the denser components remain on the circumference and the less dense components migrate towards the central axis plane.
  • the less dense components are discharged through one or more openings in the tube.
  • Mixing between the inlet and the outlet is prevented with the help of a plug in the pipe.
  • the denser components are output via a circumferential channel.
  • the invention aims to provide a structurally simplified and less prone to failure full-shell centrifuge.
  • a solid jacket centrifuge for multi-phase mixtures for example three-phase mixtures, in particular for fiber suspensions in the paper industry, with a housing and a rotor for separating the multi-phase mixture into a light, a medium and a heavy fraction with at least one opening in the rotor jacket for the heavy fraction
  • a conveyor is arranged in the space between the outer rotor wall and the housing, which conveys a barrier medium in the space in the direction of at least one opening for the heavy fraction with at least the pressure prevailing there.
  • a solid-bowl centrifuge for multi-phase mixtures in particular for fiber suspensions in the paper industry with a housing and a rotor according to the invention, is characterized in that gas or a gas-saturated liquid in the mixture to be separated for flotation in the direction of separating the light Fraction is introduced.
  • the gas or the gas-saturated liquid can be introduced via the inlet or via the housing and / or assigned openings in the rotor or in the outer boundary wall of the separation space.
  • Such a solid bowl centrifuge generally provides for flotation with the help of gas or a gas - saturated liquid, whereby flotation means that contaminants such as paint particles etc. , can be conveyed from the area in the vicinity of the outer boundary wall of the separation space in the direction of the area of the separation space near the axis.
  • flotation means that contaminants such as paint particles etc.
  • contaminants can be conveyed in a targeted manner to the area for separating off the light fraction in order to effectively improve the separation efficiency of such a centrifuge.
  • a solid-bowl centrifuge according to the invention is designed such that a substantially rotationally symmetrical separation space is formed between an outer boundary wall near the housing and an inner boundary wall near the axis, in which the mixture to be separated enters near an axial end, and that a light material Separating element projects axially spaced from the mixture inlet end approximately radially into the separation space.
  • a light material Separating element projects axially spaced from the mixture inlet end approximately radially into the separation space.
  • a zone of higher pressure is formed in the separation space to support the separation of the light fraction, which zone starts from the outer boundary wall of the separation space and extends in the radial direction.
  • a further defined zone of lower pressure preferably atmospheric pressure, at the region of the separation space near the axis, in which the light fraction is reliably separated in the region near the axis by means of the light-material separating element and can then be derived from there in a suitable manner.
  • the essentially radial overlap area of the material-separating element and the accumulation / overflow element provides a delivery pressure for the fraction to be separated in each case, so that in the solid jacket centrifuge according to the invention, regardless of the number of phases of the mixture to be separated, in the area of the separation space as a whole Working area of the solid bowl centrifuge, a sufficient discharge pressure is available without additional measures to provide continuous operation of the solid bowl centrifuge in such a way that sufficient discharge pressures are available for the discharge of the phases to be separated.
  • the rotor has at least one conveying channel in which the mixture to be separated is given a rotational movement during the conveying movement to the separation space, so that as soon as the mixture enters the Separation space this has a rotational movement to support the separation of the fractions.
  • the feed channel can be formed in the rotor, or they are formed on the rotor, and a separate part can optionally be provided for this purpose, which surrounds the rotor of the full-shell centrifuge according to the invention. This possibly forms the inner boundary wall of the separation space
  • the end can preferably be firmly connected to the housing.
  • the space between the outer rotor wall and the housing is sealed by means of hydrodynamic seals.
  • the gap-like space is kept clear by the middle and heavy fraction.
  • the middle fraction is retained in the separation space by a slight counterflow in the separation space and this fraction is prevented from escaping to the outside.
  • the inner boundary wall of the separation space is preferably conical and preferably tapers in the direction of the axis of rotation.
  • an outlet for the light fraction is provided closest to the axis of rotation. Due to the centrifugal force which acts on the mixture to be separated in the separation space, the light fraction collects in the vicinity of the axis of rotation of the full-shell centrifuge according to the invention, so that direct discharge in the vicinity of the axis of rotation is possible in a simple and constructively advantageous manner.
  • an outlet can be provided for the middle fraction or a second fraction, which can be the accepted material, for example, when used on fiber suspensions in the paper industry.
  • the invention according to the solid bowl centrifuge is designed in such a way that the housing or the outer housing of the centrifuge is stationary and in the interior of which the centrifugal force-assisted separation of the corresponding phases of the mixture to be separated takes place.
  • the outer boundary wall of the separator can be tion space be firmly connected to the rotor.
  • the outer boundary wall of the separation space can be formed separately from the rotor and, if necessary, can also be driven separately for this purpose, so that different rotational speeds can be given to the respective inner and outer boundary walls and thereby effectively influence the phase separation and also the amount of flow (pumping effect) of the mixture.
  • the conveying device for the barrier medium is preferably designed in the form of grooves or blades.
  • the separation space can widen in the direction of the opening for the heavy fraction in the solid jacket centrifuge according to the invention.
  • the derivation of the heavy fraction in the direction of the opening is designed to be streamlined.
  • a discharge device with at least one lock can be provided in the discharge area.
  • the housing is designed as a pressure vessel.
  • At least one flushing device is preferably provided for cleaning work, which can be designed in the form of a cleaning lance and can be provided on the housing.
  • the rotor on its inlet side is connected upstream of a ballast element for reducing the impact losses caused by the mixture to be separated.
  • At least one entraining element for the mixture can be provided on the outer boundary wall of the separation space. be seen in order to intensify the circulation of the mixture in the separation space.
  • all walls and parts which come into contact with the abrasive heavy fraction during operation of the centrifuge can be made of wear-resistant material or can be provided with a wear-resistant coating. As a result, the durability of the solid bowl centrifuge according to the invention is significantly improved.
  • FIG. 1 is a schematic longitudinal sectional view of a solid bowl centrifuge according to the invention
  • FIG. 2 shows a schematic longitudinal sectional view of a preferred embodiment of a solid-bowl centrifuge according to the invention, in which the outer boundary wall of the separation space is driven separately by the rotor, and a light-weight separating element is firmly connected to the rotor,
  • FIG. 3 shows a schematic longitudinal sectional view of a further preferred embodiment of a full-shell centrifuge according to the invention, in which the rotor is firmly connected to the outer boundary wall of the separation space and the light-weight separating element,
  • FIG. 4 shows a schematic longitudinal sectional view of a further development of a solid bowl centrifuge according to FIG. 3, in which the light fraction is derived in the rotor itself, O 99/35331
  • Fig. 5 is a schematic longitudinal sectional view of a further embodiment of a solid bowl centrifuge, in which the rotor is firmly connected to the outer boundary wall of the separation space and the inner boundary wall of the separation space is formed by a separate part in the form of an annular shell body which is fixed to the housing connected is,
  • FIG. 6 is a schematic sectional view taken along the line A-A in FIG. 4,
  • FIG. 7 is a schematic sectional view taken along line B-B in FIG. 4,
  • FIG. 9 shows a schematic partial sectional view of a further embodiment of a full-shell centrifuge according to the invention, in which flotation is carried out by means of a gas or a gas-saturated liquid, and
  • Fig. 10 is a schematic partial sectional view of a further embodiment of a solid bowl centrifuge according to the invention, in which a damming / overflow element is formed by an end face of the housing.
  • a fixed or stationary housing 2 is provided, a multiphase mixture to be separated being separated in a stationary manner, for example via a pipe elbow 3. is directed.
  • the mixture to be separated or separated is then passed to a rotor 7, which can also be referred to as a conveyor rotor, via a rotary leadthrough 4 and a movable part, for example designed as a hollow shaft 5, which is arranged about an axis of rotation 6.
  • a ballast element 8 is connected upstream in the feed rotor 7 on the inlet side for the mixture to be separated, which is formed, for example, by the hollow shaft 5, in order to reduce shock losses in the rotor 7.
  • this ballast element 8 is designed in the form of a guide plate 8 which tapers from the rotor 7 in the direction of the wall of the housing 2.
  • the mixture to be separated is introduced via a rotor inlet 9 or a conveyor rotor inlet 9.
  • This mixture to be separated is conveyed via channels 10 or delivery channels 10 with the rotor 7 rotating into a separation space 12, in which the mixture to be separated opens into the separation space 12 via outlets 11.
  • the separation space 12 is essentially rotationally symmetrical and is formed between an outer boundary wall 24 near the housing and an inner boundary wall 13 near the axis.
  • the channels 10 preferably run approximately parallel to the inner boundary surface 13 of the separation space 12.
  • the inner boundary wall 13 of the separation space 12 is conical in the direction of the discharge point for the light fraction and preferably tapers conically.
  • the inner boundary surface 13 of the separation space 12 is formed by the outer surface of the rotor 7, which runs conically in the direction of the discharge point for the light fraction (discharge openings 14 and 21 for the light fraction) , so that the outer surface of the rotor 7 at the same time the re boundary wall or the inner boundary surface 13 of the separation space 12 forms.
  • a separate part 15 surrounding the rotor 7 and forming the inner boundary wall 13 of the separation space 12 is provided, which is preferably firmly connected to the housing 2.
  • This part 15 is formed, for example, by an annular jacket body, which at the same time forms the inner boundary wall 13 of the separation space 12.
  • This part 15, designed in the form of a jacket body is arranged in a closely fitting manner around the conically shaped rotor 7 and around a part of the hollow shaft 5 as a rotationally symmetrical body while maintaining a narrow gap 16.
  • This part 15, which is designed as an annular jacket body is firmly connected to the stationary housing 2 by means not shown in detail.
  • the embodiments of the solid-wall centrifuge according to the invention shown in the drawings have a light-weight separating element 17 which projects axially spaced from the mixture inlet end approximately radially into the separation space 12.
  • a disk-shaped light-weight separating element 17 is provided, which is arranged in a rotationally symmetrical manner on the part 15 designed as an annular jacket body in the direction of flow through the solid jacket centrifuge 1 at the end of the inner boundary surface 13.
  • This light-weight separating element 17 is firmly connected to that part 15 designed as an annular jacket body in the region of the discharge points for the light fraction (discharge openings 14).
  • a tube 18 is connected to the light-weight separating element 17, which is arranged in a rotationally symmetrical manner around the hollow shaft 5, the axis of rotation 6 of the rotor 7 and around the separate part 15 in the form of an annular jacket body and the light-weight discharge openings 14 and enclosing them.
  • the separated light fraction is passed into a fixed light material collecting container 19 (collecting container for the light fraction), which has an outlet connection 20.
  • a light-weight separating element 17 is provided, which is rotationally symmetrical and disk-shaped.
  • This light material separating element 17 is arranged at the end of the inner boundary surface 13 of the separation space 12 and projects approximately radially into the separation space 12.
  • the disk-shaped light material separating element 17 is between the discharge openings 14 for the light fraction with the inner boundary surface 13 of the Separation room 12 firmly connected.
  • a tube 18 is provided to discharge the light fraction, which is arranged rotationally symmetrically about the hollow shaft 5 and the axis of rotation 6 of the rotor 7.
  • the separated light fraction is collected via the pipe 18 in a collecting container 19 for the light fraction (light material collecting container 19), which has an outlet connection 20.
  • the light-weight separating element 17 which is designed to be rotationally symmetrical, is arranged at the end of the inner boundary surface 13 of the separation space 12 and is tightly and firmly connected to the rotor 7.
  • This light material separating element 17 converges in the direction of the discharge openings 14 for the light fraction.
  • the discharge openings 14 are formed by radial bores 21 which point in the rotor 7 in the direction of the axis of rotation 6. There they open into a collecting tube 22.
  • FIG. 7 shows the arrangement of the radial bores 21 in the rotor 7, which open into a collecting tube 22 and run between the channels or delivery channels 10.
  • the separated light fraction is fed via the radial bores 21 to the collecting tube 22 running on the axis of rotation 6. leads and led out in a manner not shown via the drive shaft 23 of the rotor 7.
  • the outer boundary wall 24 of the separation space 12 is firmly connected to the rotor 7 via the end wall of the separation space 12. Furthermore, a jam / overflow element 25 is provided downstream of the light material separating element 17 in the direction of flow, which is provided axially spaced from the light material separating element 17 such that at least the free edge of the light material separating element 17 partially overlaps in the radial direction through the jam / overflow element 25 becomes.
  • the end wall of the separation space 12 opposite the light-substance separating element 17 is designed as a disk-shaped, rotationally symmetrical accumulation / overflow element 25.
  • the outer boundary wall 24 of the separation space 12 is firmly connected to a rotationally symmetrical rotary part 27 which is separated from the rotor 7 via a gap 26 and which also forms the end wall of the separation space.
  • the opposite end wall is designed as a disk-shaped, rotationally symmetrical accumulation / overflow element 25.
  • the rotating part 27, which is firmly connected to the outer boundary wall 24 of the separation space 12, is driven by a drive shaft 23.
  • the drive shaft 23 is supported on the stationary housing 2 by means of floating bearings 28, 29 and a connection is made to a rotary drive (not shown) via a feather key 30, so that the rotary part 27 is rotated about the axis of rotation 6.
  • the rotor 7 is supported via its shaft journal 31 and by means of a bearing 32 at the top of the rotating part 27.
  • a counter bearing 33 and a pulley 34 for separately driving the rotor 7 are arranged on the hollow shaft 5.
  • the counter bearing 33 is supported via the housing 2.
  • Corresponding camps are also located 28, 29, 32 and 33 are provided, which are sealed in a manner known per se.
  • the core of the rotor 7 is designed as a cavity 35, which contributes to material and weight savings with regard to the design of the rotor 7.
  • the rotor 7 is firmly connected to the drive shaft 23.
  • the rotor 7 is mounted in the housing 2 together with the drive shaft 23 by means of floating bearings 28, 29.
  • a drive connection with a drive device is established via a feather key 30 with the drive shaft 23 of the conveyor rotor 7, so that the rotor 7 rotates about the axis of rotation 6.
  • the bearings 28, 29 described above are sealed in a conventional manner.
  • the rotor 7 is also firmly connected to the drive shaft 23, and this arrangement is mounted on the one hand in a bearing 36 and on the other hand via the hollow shaft 5 and a bearing 37 on the housing 2.
  • This drive shaft 23 is connected via a feather key 30 to a rotary drive device, not shown, so that the rotor 7 performs a rotary movement about the axis of rotation 6.
  • the bearings 36, 37 are sealed in a manner known per se.
  • the accumulation / overflow element 25 is followed by a collection container for the middle fraction, for example an accept material collection container 38, which has an outlet connection 39.
  • Zone I extends from the outer boundary wall 24 in the direction of the axis of rotation 6 of the separation space 12. The course is preferably parallel to the rotation, and zone I extends at least approximately to the radius of the clear width of the accumulation / overflow element 25. Zone I is concerned it is a zone of higher pressure which acts as a separation zone for the light fraction to aid in the separation of the light fraction.
  • a second zone II is entered in FIG. 8, which is a zone of lower pressure, preferably atmospheric pressure, on the area of the separation space 12 near the axis, the discharge area for the light fraction.
  • This second zone II of lower pressure is delimited by the zone I of higher pressure, the light material separating element 17 and the inner boundary surface 13 of the separation space 12.
  • the light fraction separated from zone I collects in this second zone II and is discharged via the openings 14 (light material discharge openings 14) and the pipe 18 connected to it.
  • the light-weight separating element 17 and the accumulation / overflow element 25 and the external resistance (pipe friction, geodetic height, etc.) result in an overlap area D which brings about a delivery pressure for the fraction to be separated in each case.
  • the pressure generated in this way allows the accept to be passed on to the accept container 38, which is a container for the middle fraction.
  • the good The material collection container 38 is connected to an accept material outlet connector 39.
  • the radial difference D lies between zone I and zone II, the radial difference D not being shown to scale.
  • the radial difference D viewed in the direction of flow, lies in front of the light-weight separating element 17 and is formed in cooperation with the clear width of the accumulation / overflow element 25. This radial difference D, in cooperation with the centrifugal force of this mass, builds up a corresponding delivery pressure for forwarding the middle fraction or the accept.
  • the pipe 18 for discharging the light fraction, which goes through the lower housing wall, is sealed at the passage point in a corresponding manner, for example by means of a stuffing box 40.
  • the hollow shaft 5, which passes through the lower housing wall can also be sealed in a correspondingly suitable manner, for example with the aid of a stuffing box 40.
  • openings 41 are provided in the outer boundary wall 24 of the separation space 12 for the continuous separation of the heavy fraction.
  • the inner surface 42 of the outer boundary wall 24 is partially funnel-shaped in such a way that the separation space 12 widens in the direction of the opening (s) 41 for the heavy fraction. Separated by a gap 43, these openings 41 are followed by a separation space 44 for the heavy fraction in the housing 2, which is arranged in a ring around the axis of rotation 6.
  • the separation space 44 completely covers the openings 41 during the rotational movement of the outer boundary wall 24 of the separation space 12, so that there is no shearing of the heavy fraction (which may contain metal parts or the like) when passing through the openings 41 into the separation space 64.
  • a discharge device 45 with at least one lock 46, 47 is connected to the separation space 44.
  • a conveying device 51 is arranged, which conveys a barrier medium in the space 43 in the direction of the at least one opening 41 for the heavy fraction with at least the pressure prevailing there.
  • the conveying device 51 can be arranged in the region of that part of the rotor outer wall 24 which is referred to as the accumulation / overflow element 25 and extends in the radial direction. This radial extension of the rotor outer wall 24 can then form the accumulation / overflow element 25 at the same time.
  • the hydraulic sealing of the gap-shaped space 43 takes place via rotationally symmetrical self-contained ring elements which are formed on the one hand by the radially elongated end wall and on the other hand by the radially elongated accumulation / overflow element 25.
  • the rotationally symmetrical, annular grooves 48, 49 in the housing 2 extend over the radially elongated accumulation / overflow element 25.
  • the ring elements formed in this way have shapes at the radial ends, for example in the form of cutouts 50, which can be seen, for example, from FIG.
  • grooves 51 are arranged in the radial direction on the sides facing the housing 2 and serve as a conveying device 51 for the barrier medium in the space 43. This conveyor or the grooves 51 are also shown in FIG. 6.
  • the barrier medium is supplied via one or more supply line (s) 52 in the housing 2.
  • the barrier medium which can be, for example, barrier water or another liquid, is supplied to the grooves 48 and 49 radially outward via the feed line 52 and the grooves 51 by means of the centrifugal force.
  • the barrier medium is rotated by means of the cutouts 50 in such a way that a high barrier medium pressure prevails at these grooves 48 and 49, so that the mixture in the gap-shaped space 43 and also the heavy fraction do not pass through the grooves 48 and 49 in the housing 2 can escape.
  • the conveying device 51 thus conveys the barrier medium in the space 43 in the direction of at least one opening 41 for the heavy fraction with a pressure which corresponds at least to the pressure prevailing there.
  • the radial grooves 51 provided in the accumulation / overflow element 25 are shown for the supply of the blocking medium into the groove 49, which is located in the housing 2.
  • This figure 6 also shows the cutouts 50 and the hollow shaft 5 with the ballast element 8 located therein, which is designed in the form of a guide plate.
  • a flushing device in the form of a flushing lance 53 is provided for the discontinuous discharge of the separated heavy fraction from the area of the outer boundary wall 24 of the separation chamber 12.
  • This rinsing device rinses out the heavy fraction, for example, via the accumulation / overflow element 25, the collecting container 38 and the outlet connection 39 by means of rinsing water to form a collecting trough (not shown).
  • the hydraulic sealing of the gap-shaped space 43 takes place via a rotationally symmetrically closed ring element which projects through the radially elongated accumulation / overflow element 25 into the rotationally symmetrical, annular groove 49 in the housing 2.
  • This ring element has cutouts 50 at the radial end.
  • the blocking medium is supplied via supply lines 54.
  • the accumulation / overflow element 25 is formed by the corresponding end wall of the stationary housing 2.
  • FIGS. 9 and 10 in which zones I and II are entered in accordance with the explanation of FIG. 8, serve to describe in more detail an alternative embodiment of a solid-bowl centrifuge according to the invention, in which a gas or a gas-saturated liquid flows into the to be separated Mixture is introduced into the separation space 12 in the direction of separating the light fraction.
  • the gas or the gas-saturated liquid can be introduced via the inlet 3, for example.
  • An alternative embodiment is explained with reference to FIGS. 9 and 10, in which a feed line 56 for gas or a gas-saturated liquid is provided on the housing 2.
  • the gas introduced via the supply line 56 on the housing 2 or the gas-saturated liquid introduced via it is fed via openings 55 of the rotor or the outer boundary wall 24 to the separation space 12 in such a way that flotation is obtained in the separation space 12 through the contaminants, such as paint particles and The like, are conveyed from the area of the outer boundary wall 24 of the separation space 12 in the direction of the area of the separation space 12 close to the axis, that is to say in the direction of the axis of rotation 6, in such a way that they can reach the area for separating the light fraction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)

Abstract

L'invention concerne une centrifugeuse à enveloppe pleine (1) pour mélanges à plusieurs phases, de préférence pour mélange à trois phases, qui est destinée en particulier à des suspensions de matières fibreuses utilisées dans l'industrie du papier. La centrifugeuse à enveloppe pleine (1) comporte un carter, un rotor (7) servant à la séparation du mélange à plusieurs phases en une fraction légère, une fraction moyenne et une fraction lourde. Dans l'enveloppe du rotor (7) se trouve au moins une ouverture (41) servant à l'expulsion de la fraction lourde. Dans un espace (43) compris entre la paroi extérieure (24) du rotor (7) et le carter (2) se trouve un dispositif d'alimentation (51) qui amène un milieu de barrage dans l'espace (43), en direction d'au moins une ouverture (41) destinée à la fraction lourde, à la pression régnant dans cet espace.
EP99927569A 1998-01-09 1999-01-11 Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier Ceased EP1056904A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1998100653 DE19800653A1 (de) 1998-01-09 1998-01-09 Vorrichtung zum Abtrennen von Partikeln, oder von Partikeln und Gasen, oder von Fluiden anderer Dichte aus Flüssigkeiten, oder Suspensionen, oder Emulsionen, die ein feststehendes Gehäuse besitzt und mit Hilfe der Zentrifugalkraft separiert und auch diese obengenannten Medien durch diese Vorrichtung und eventuell nachgeschaltete Mittel fördert
DE19800653 1998-01-09
PCT/EP1999/000114 WO1999035331A2 (fr) 1998-01-09 1999-01-11 Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier

Publications (1)

Publication Number Publication Date
EP1056904A2 true EP1056904A2 (fr) 2000-12-06

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Application Number Title Priority Date Filing Date
EP99927569A Ceased EP1056904A2 (fr) 1998-01-09 1999-01-11 Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier

Country Status (4)

Country Link
EP (1) EP1056904A2 (fr)
CA (1) CA2317528A1 (fr)
DE (1) DE19800653A1 (fr)
WO (1) WO1999035331A2 (fr)

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WO1999035331A3 (fr) 1999-09-10
WO1999035331A2 (fr) 1999-07-15
CA2317528A1 (fr) 1999-07-15

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