EP0359682A1 - Vorrichtung zur selektiven Abscheidung von Partikeln in einem Fluidum, insbesondere zur Reinigung von Suspensionen in der Papierindustrie - Google Patents

Vorrichtung zur selektiven Abscheidung von Partikeln in einem Fluidum, insbesondere zur Reinigung von Suspensionen in der Papierindustrie Download PDF

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Publication number
EP0359682A1
EP0359682A1 EP89420338A EP89420338A EP0359682A1 EP 0359682 A1 EP0359682 A1 EP 0359682A1 EP 89420338 A EP89420338 A EP 89420338A EP 89420338 A EP89420338 A EP 89420338A EP 0359682 A1 EP0359682 A1 EP 0359682A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
suspension
central body
outlet
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89420338A
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English (en)
French (fr)
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EP0359682B1 (de
Inventor
Alain Serres
François Julien Saint Amand
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.)
CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSE
Kadant Lamort SAS
Original Assignee
CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSE
E&M Lamort Fils SA
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 CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSE, E&M Lamort Fils SA filed Critical CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSE
Priority to AT89420338T priority Critical patent/ATE78533T1/de
Publication of EP0359682A1 publication Critical patent/EP0359682A1/de
Application granted granted Critical
Publication of EP0359682B1 publication Critical patent/EP0359682B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • 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

  • the invention relates to a device for the selective separation of particles in a liquid, in particular in a suspension.
  • the invention is particularly suitable for the paper industry, in particular for the purification of particulate suspensions, such as for example fibrous suspensions.
  • the invention may however find other applications in classification or fractionation techniques by centrifugation, in the recovery of immiscible liquids of different densities, etc.
  • This device gives excellent results in terms of efficiency, rejection rate and energy consumption, in particular for productions of less than about three hundred cubic meters per hour in diluted paste (concentration of the order from 1 %).
  • concentration of the order from 1 %) concentration of the order from 1 %.
  • the present invention overcomes these drawbacks.
  • the invention also relates to an improved device of the type in question making it possible to purify high quantities of pasta of the order of five hundred cubic meters per hour (500 m3 / h) and more.
  • This improved device for the separation of particles in a liquid, in which the suspension to be purified is brought into a chamber of revolution rotating around a longitudinal axis of the type comprising: - Fixed suspension supply means, arranged along the longitudinal axis of the enclosure of revolution, extended by mobile means for deflecting the suspension current towards the periphery of the enclosure; - Means for driving said enclosure in rotation about its longitudinal axis; - Fixed means for leaving the purified suspension and the various separate fractions, arranged along the longitudinal axis of said enclosure, preceded by mobile deflection means and in which the means for leaving the lightest components is placed on the longitudinal axis of rotation, either on the inlet side of the suspension to be purified or on the outlet side of the purified suspension, and in which: the mobile deflection means preceding the fixed outlet means capture the greatest part of the flow rate of the suspension at the periphery of the enclosure, then divert it towards the longitudinal axis of rotation, so as to recover the major part kinetic energy of rotation; -
  • the invention consists in providing in the device described in document EP-B-0037 347 of the Applicant, a single rigid central body of generally tapered and convergent shape inside the enclosure, which occupies degressive part of the interval between the supply and exit means, associated with a scooping means arranged in the vicinity of its smallest section and intended to extract the light fraction from the suspension.
  • the scoop system arranged in the central body of revolution of the device converts the residual energy of the vortex (dynamic and static pressure) into static pressure. This avoids back pressure on the outlet side and therefore allows the inlet pressure to be reduced by the same amount, thus resulting in appreciable energy savings.
  • the interval between the internal wall of the enclosure and the wall of the central body gradually increases from the entrance to the exit;
  • the enclosure has a generally internal cylindrical shape and the characteristic central body has a diabolo shape;
  • the central body in the shape of a diabolo comprises three distinct portions, respectively: . a first frustoconical portion, tapered towards the exit; . a second cylindrical portion connected to the first portion, comprising at the periphery orifices associated with the scooping means; .
  • a third portion also frustoconical, but of opposite taper to the first portion, connected to the second cylindrical portion and comprising an axial duct associated with the scooping means, intended to extract the light fraction;
  • the scooping means are constituted by radial fins associated with the peripheral orifices of the second cylindrical portion;
  • the inlet and outlet ends of the central body are integral with the enclosure of revolution, and are driven in rotation by a single motor at the same speed as the speed of rotation of said enclosure;
  • the central body is rotated at a speed different from that of the enclosure, but is integral with the inlet and / or outlet heads of the enclosure; in this case, advantageously the central body has, at the periphery, fins arranged along a generator.
  • This central body generally comprises scraping or scooping elements of the heavy particles decanted against the internal wall of the rotor, in order to bring them close to the axis and to extract them from the device (see for example FR-A- 1,450,895 (US correspondent US-A-3,467,304); US-A-4,332,350 or GB-A-1,366,170).
  • the central body is necessarily of different shape from the internal wall of the enclosure, in particular at the level of the scooping devices, so as to bring it back to the vicinity of the central body and to extract the axis no longer the heavy particles, but the light fraction of the suspension.
  • the invention consists, for this new application and in order to achieve the objective of extracting the light fraction, to define a particular and specific shape of central body with respect to the internal wall of the enclosure, namely converging and positioning the scooping point on this central body at the point of smallest section.
  • the apparatus is in this case particularly suitable for the field of fine purification in diluted paste, because the presence of the central body makes it possible to better channel the flow, in particular at the outlet of the injection channels of the inlet head.
  • the parasitic recirculation flows, as well as the radial variations in the angular speed of the dough, are reduced, which makes the flow more uniform, with in particular a more homogeneous state of agitation.
  • the central body is driven in rotation separately from the rotary body of the device, but jointly with the inlet and / or outlet heads of the suspension, the device is then perfectly suited for purifying suspensions more concentrated.
  • the improvement of the control of the flow in the external peripheral zone is ensured not only by the presence of the central body, but also by the choice of its differential speed of rotation, which makes it possible to re-train the dough in rotation, in order to keep the suspension at the optimum degree of agitation.
  • the differential in speed of rotation of the central body is chosen in accordance with the difference in speed of the suspension relative to the wall at the level of the injection zone, according to the characteristics of the supply head.
  • the enclosure, the supply means, the mobile deflection means, the output means, the rotation drive means are produced in a known manner, in particular according to the teachings of document EP-B-0037 347 referred to in the preamble , for example stainless steel.
  • the converging central body has the following characteristics: - a conical shape converging from the heads of the inlet and outlet of the suspension (diabolo) allows a good evacuation of the light rejects, by favoring the displacement of the light components towards the extraction zone which can be located at all levels between the heads, and in particular towards the outlet head, when the latter comprises the axial tube for evacuating light rejects; - the diameter of the scoop, arranged at the point of smallest section of the diabolo, must be large enough to avoid the formation of the air core and to recover the residual pressure necessary for the extraction of the light fraction, but it must also be substantially less than the internal diameter of the enclosure, to avoid the simultaneous extraction of heavy particles; - the diameter of the central body at the level of the intake and outlet heads must be large enough, in order to properly control the flow in the peripheral purification zone, and more particularly at the level of the intake head, in order to better channel parasitic flows; in the case where the central body is rotated separately from the body of the device, this central body can advantageous
  • the internal wall of the enclosure is cylindrical.
  • the purification device consists of: - a hollow enclosure (1) cylindrical internally and externally driven in rotation about its longitudinal axis (2), by known means, not shown (motor); - bearings (3) and (4), associated with conventional seals (20-24), allowing the enclosure (1) to rotate on its axis (2); - a tube (5) forming a fixed means for supplying the suspension to be purified and opening out via a rotary connection at the head of the enclosure (1), in a supply conduit (6) forming mobile deflection means; - opposite the inlet means (5,6) and opposite the enclosure (1), outlet means also formed by two fixed conduits (9,10) forming fixed outlet means, connected, by means of rotary couplings, respectively at the duct (7) closest to the outlet periphery, for the extraction of the heaviest particles, and at the concentric outlet duct (8), for the extraction of the intermediate fraction; - a central body (11) rigid characteristic of revolution in the form of a diabolo aligned on the longitudinal axis (2), fixed
  • the central body (11) and the inlet (6) and outlet (7) means constitute an integral assembly driven in rotation separately from the enclosure.
  • the fixed means (5) and (8) are respectively connected to the mobile means (6) and (10) by tight connections (20-24) and (22-23), and the central body has a form of diabolo.
  • This diabolo (11) is also equipped at the periphery with fins (14,15) for driving the suspension to be purified, arranged along generators and equidistant from each other.
  • Bearings (16,17) associated with conventional seals (23,24) allow the central diabolo (11) to rotate around the longitudinal axis (2) at an appropriate speed.
  • the scoop (12) formed in the central body forms a movable means for leaving the light fraction and is extended downstream by a discharge duct (13) disposed along the axis (2).
  • a scoop (18) formed in the outlet head (19) allows the heaviest fraction to be extracted in the peripheral zone (7) by forming the movable means for leaving this heavy fraction.
  • This scoop (18) is extended downstream by an outlet duct (25) arranged along the longitudinal axis (2).
  • Movable means (26) for supplying an auxiliary dilution fluid are provided along the outlet head (19) secured to the central diabolo (11) and are connected, by means of sealed connections (21-22), to fixed means (27) for supplying the auxiliary dilution fluid. It is important that the characteristic scoop (12) is placed in the vicinity of the weakest section of the converging central body (11) and preferably on this point, to properly recover the entire light fraction.
  • washing water minimizes, in the case of paper pulps, the fiber losses which tend to concentrate towards the wall, with heavy contaminants.
  • the continuous evacuation assembly (18,25) of heavy rejects is associated with devices (26,27) for continuous injection of washing water which put take advantage of the space (26) located between the outlet head (19) linked to the central body (11) in diabolo and the outlet flange of the enclosure (1) of the device.
  • the same devices (18,25) can be used alternately for the discontinuous injection of washing water from the heavy fraction and for the discontinuous extraction of the heavy contaminants, the extraction phase being advantageously very short. relative to the washing phase, in order to minimize the heavy refusal losses.
  • FIG. 3 shows schematically in longitudinal section a device particularly suitable for the purification of paper suspensions.
  • the internal washing wall of the enclosure (1) is cylindrical.
  • the characteristic converging central body (11) in the shape of a diabolo includes: - A first frustoconical portion (30), tapered towards the outlet (7), occupying more than half the distance between the inlet (6) and the outlet (7); for manufacturing and mounting convenience, this frustoconical portion (30) is fixed at its wide part (31) to the supply head (32) of cylindrical shape and comprising oblique channels for injecting paper pulp; thus, the distance D between the internal wall (50) of the enclosure (1) and the wall (51) of the central body (30) increases regularly from the inlet (6) towards the outlet (7); - A second cylindrical portion (33) fitted (34) at the tapered end of the first portion (30), to define an area of smaller section, having orifices (35,36,37) at the periphery and whose internal wall (38) (see FIG.
  • 4) comprises radial fins (40,41,42); the set of orifices (35-37), fins (40-42) form a scooping assembly similar to (12); in this way, as before (12), the scooping is carried out at the low point of the central body (30); - A third frustoconical portion (45), but of opposite taper to (30), integral at (46) with the cylindrical portion (33) and which comprises an axial duct (47) similar to (13), associated with the assembly scooping (35-37, 40-42), intended to extract the light fraction from the suspension.
  • the cylindrical enclosure (1) has an internal diameter of 0.75 m for a length of 2.5 m.
  • the inlet cylindrical portion (32) has a diameter of 0.62 m for a length of 0.2 m.
  • the first frustoconical inlet portion (30) has a length of 1.7 m for a diameter which gradually decreases from 0.6 to 0.36 m.
  • the cylindrical scooping section (33) has a length of 0.2 m for a diameter of 0.36 m.
  • the third frustoconical outlet portion (45) has a length of 0.4 m with a diameter which increases from 0.45 to 0.55 m.
  • the orifices (35,36) have a diameter of 0.05 m and the axial duct (47) a diameter of 0.05 m.
  • Such a purifying device can treat flow rates of the order of five hundred cubic meters per hour (500 m3 / h) and more.
  • the fiber concentration of which is of the order of 0 to 3%, preferably of the order of 1.5%
  • the effectiveness of this scrubber is between 90 and 99%, with a fiber loss rate of less than 0.5%.
  • the energy consumption is considerably reduced compared to that of an installation comprising two usual purifiers in parallel (21 kw against 2 x 17 kw), a saving to which must be added a saving of pumping energy of 12 kw, for a total of 21 kw against 46 kw for a nominal flow of 450 m3 / hour.
  • This considerable reduction is due to the increase in capacity of the device and the fact that it is no longer necessary to provide back pressure at the outlet of the device.
  • the separator device of the invention has many advantages over those known to date, in particular that described in document EP-B-0037347 of the Applicant referred to in the preamble.
  • this device can be successfully used for the treatment and purification of various suspensions, such as for example suspensions of various paper pulps, waste water or polluted water, water-petroleum suspensions, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Centrifugal Separators (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP89420338A 1988-09-13 1989-09-12 Vorrichtung zur selektiven Abscheidung von Partikeln in einem Fluidum, insbesondere zur Reinigung von Suspensionen in der Papierindustrie Expired - Lifetime EP0359682B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420338T ATE78533T1 (de) 1988-09-13 1989-09-12 Vorrichtung zur selektiven abscheidung von partikeln in einem fluidum, insbesondere zur reinigung von suspensionen in der papierindustrie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812156 1988-09-13
FR8812156A FR2636251B1 (fr) 1988-09-13 1988-09-13 Dispositif pour la separation de particules dans un liquide, notamment pour l'epuration de suspensions papetieres

Publications (2)

Publication Number Publication Date
EP0359682A1 true EP0359682A1 (de) 1990-03-21
EP0359682B1 EP0359682B1 (de) 1992-07-22

Family

ID=9370102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420338A Expired - Lifetime EP0359682B1 (de) 1988-09-13 1989-09-12 Vorrichtung zur selektiven Abscheidung von Partikeln in einem Fluidum, insbesondere zur Reinigung von Suspensionen in der Papierindustrie

Country Status (11)

Country Link
US (1) US5131544A (de)
EP (1) EP0359682B1 (de)
JP (1) JP2661757B2 (de)
AT (1) ATE78533T1 (de)
BR (1) BR8907082A (de)
CA (1) CA1331956C (de)
DE (1) DE68902205T2 (de)
ES (1) ES2034729T3 (de)
FI (1) FI95056C (de)
FR (1) FR2636251B1 (de)
WO (1) WO1990002839A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000810A1 (en) * 1990-07-10 1992-01-23 Bardyne, Inc. Orbital separator and method of orbitally separating a mixture
EP0501134A1 (de) * 1991-02-26 1992-09-02 Voith Sulzer Stoffaufbereitung GmbH Reiniger für Stoffsuspensionen
WO1997023688A1 (de) * 1995-12-21 1997-07-03 Hermann Finckh Maschinenfabrik Gmbh & Co. Gerät zum aufbereiten von für die papier- bzw. pappeproduktion vorgesehenen fasersuspensionen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90358C (fi) * 1992-05-19 1994-01-25 Pom Technology Oy Ab Menetelmä ja laite kuitususpension lajittelemiseksi
US5368735A (en) * 1993-03-08 1994-11-29 Claude Laval Corporation Liquid/solid separator with a conduit between a vortex and a quiescent collector zone
US5468396A (en) * 1994-03-16 1995-11-21 Pulp And Paper Research Institute Of Canada Centrifugal cleaning of pulp and paper process liquids
US5578209A (en) * 1994-09-21 1996-11-26 Weiss Enterprises, Inc. Centrifugal fluid separation device
PT102320A (pt) * 1999-06-09 2000-12-29 Finidro Financiamento Energeti Processo e aparelho para a preparacao de pasta de papel a partir de aparas de papel
AUPR080100A0 (en) * 2000-10-17 2000-11-09 Filtra Limited A solids separator
SE517532C2 (sv) * 2000-10-25 2002-06-18 Rolf Ekholm Metod och apparat för tvättning av en fibersuspension
CN1291796C (zh) * 2001-10-17 2006-12-27 费尔特拉有限公司 固体分离器
FR2954187B1 (fr) 2009-12-18 2014-08-01 Total Sa Separateur a ecoulement cyclonique.
FR2991593B1 (fr) * 2012-06-11 2017-09-15 Commissariat Energie Atomique Dispositif de fractionnement d'un fluide comportant des particules et d'extraction d'un volume d'interet
US10596580B2 (en) 2016-04-15 2020-03-24 Layne Christensen Company Fluid separator device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748668A (en) * 1952-07-11 1956-06-05 Beloit Iron Works Separator-pumping operation for paper stock
FR1450895A (fr) * 1964-10-06 1966-06-24 Werkspoor Nv Centrifugeuse pour la séparation d'un mélange de deux phases liquides en fonctionnement continu
GB1366170A (en) * 1971-10-15 1974-09-11 Ec Corp Processes and apparatus for effecting exchange crystallisation and co mponent separation
EP0037347A1 (de) * 1980-03-21 1981-10-07 Centre Technique Industriel dit "CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES" Verfahren und Vorrichtung zur Abscheidung von Partikeln in einem Fluidum, insbesondere zur Reinigung von Suspensionen in der Papierindustrie
US4332350A (en) * 1980-07-30 1982-06-01 Mcclellan Jack A Centrifuge apparatus for separating entrained solids from industrial waste water

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1115888A (fr) * 1954-12-17 1956-04-30 Séparateur centrifuge à traversée de liquide présentant un grand écartement entre le plan d'entrée du liquide à clarifier et le plan de sortie des matières décantées
SU417167A1 (de) * 1972-02-15 1974-02-28
SU952350A1 (ru) * 1981-01-21 1982-08-23 Московский Ордена Трудового Красного Знамени Институт Химического Машиностроения Гидроциклон-классификатор
ZA839064B (en) * 1982-12-06 1985-07-31 Broken Hill Pty Co Ltd Centrifugal separation method and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748668A (en) * 1952-07-11 1956-06-05 Beloit Iron Works Separator-pumping operation for paper stock
FR1450895A (fr) * 1964-10-06 1966-06-24 Werkspoor Nv Centrifugeuse pour la séparation d'un mélange de deux phases liquides en fonctionnement continu
GB1366170A (en) * 1971-10-15 1974-09-11 Ec Corp Processes and apparatus for effecting exchange crystallisation and co mponent separation
EP0037347A1 (de) * 1980-03-21 1981-10-07 Centre Technique Industriel dit "CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES" Verfahren und Vorrichtung zur Abscheidung von Partikeln in einem Fluidum, insbesondere zur Reinigung von Suspensionen in der Papierindustrie
US4332350A (en) * 1980-07-30 1982-06-01 Mcclellan Jack A Centrifuge apparatus for separating entrained solids from industrial waste water

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000810A1 (en) * 1990-07-10 1992-01-23 Bardyne, Inc. Orbital separator and method of orbitally separating a mixture
EP0501134A1 (de) * 1991-02-26 1992-09-02 Voith Sulzer Stoffaufbereitung GmbH Reiniger für Stoffsuspensionen
US5257698A (en) * 1991-02-26 1993-11-02 Sulzer Escher Wyss Gmbh Cleaner for stock suspensions
WO1997023688A1 (de) * 1995-12-21 1997-07-03 Hermann Finckh Maschinenfabrik Gmbh & Co. Gerät zum aufbereiten von für die papier- bzw. pappeproduktion vorgesehenen fasersuspensionen
US6068772A (en) * 1995-12-21 2000-05-30 Hermann Finckh Maschinenfabrik Gmbh & Co. Apparatus for processing fiber suspensions intended for the production of paper or cardboard

Also Published As

Publication number Publication date
FR2636251B1 (fr) 1992-01-17
FI95056C (fi) 1995-12-11
ATE78533T1 (de) 1992-08-15
FI95056B (fi) 1995-08-31
FR2636251A1 (fr) 1990-03-16
WO1990002839A1 (fr) 1990-03-22
JPH03501279A (ja) 1991-03-22
DE68902205D1 (de) 1992-08-27
JP2661757B2 (ja) 1997-10-08
EP0359682B1 (de) 1992-07-22
CA1331956C (fr) 1994-09-13
FI902374A0 (fi) 1990-05-11
US5131544A (en) 1992-07-21
BR8907082A (pt) 1991-01-08
ES2034729T3 (es) 1993-04-01
DE68902205T2 (de) 1992-12-10

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