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WO2011110285A1 - Dispositif et procédé pour la séparation de fractions de particules - Google Patents

Dispositif et procédé pour la séparation de fractions de particules Download PDF

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Publication number
WO2011110285A1
WO2011110285A1 PCT/EP2011/000891 EP2011000891W WO2011110285A1 WO 2011110285 A1 WO2011110285 A1 WO 2011110285A1 EP 2011000891 W EP2011000891 W EP 2011000891W WO 2011110285 A1 WO2011110285 A1 WO 2011110285A1
Authority
WO
WIPO (PCT)
Prior art keywords
permeate
axis
rotation
filter element
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
PCT/EP2011/000891
Other languages
German (de)
English (en)
Inventor
Lars Steinke
Siegfried Ripperger
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.)
TU KAISERSLAUTERN
Original Assignee
TU KAISERSLAUTERN
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 TU KAISERSLAUTERN filed Critical TU KAISERSLAUTERN
Publication of WO2011110285A1 publication Critical patent/WO2011110285A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/16—Rotary, reciprocated or vibrated modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2676—Centrifugal separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2315/00—Details relating to the membrane module operation
    • B01D2315/02—Rotation or turning

Definitions

  • the present invention relates to a device for separating particle fractions from a suspension comprising a
  • the invention further comprises a method for sorting
  • Particle fractions one containing the particle fractions
  • Filtered element is passed and wherein the guided into the permeate filtrate in the region of the axis of rotation of the filter element from the
  • Suspensions are of great importance in a number of process engineering processes. For example, it is of great interest to separate particulate valuable substances, in particular noble metals such as gold and silver as well as valuable minerals, from suspensions. With the filter devices of the type mentioned above and with the method mentioned above, the solid phase can be completely separated or classified, if at the inlet surface of the permeate space
  • Classifying agent in particular a sieve with suitably chosen
  • Mesh size is arranged on which particle with a
  • Object of the present invention is therefore to provide a generic device for separating particle fractions from a suspension and a corresponding method, which allow a rapid and cost-effective separation of very small particle fractions from suspensions.
  • the object of the invention is based on a
  • Removal means are provided for collecting and / or removal of permeate from the permeate space.
  • the removal means are utilized at a radial distance from the axis of rotation, that within the
  • Disc element rotates, with the result that a centrifugal force acts on the particles.
  • Due to the likewise provided in the inventive device drain opening in the region of the axis of rotation creates a radially inward so-called drag force, which accelerates the particles radially inward.
  • drag force which accelerates the particles radially inward.
  • size and / or density of the particles outwardly directed centrifugal force or the inward drag force outweighs.
  • the removal means comprise a drain opening (8) for the passage of permeate from the permeate space (6).
  • the particle fraction which can not be attributed to the desired product, is advantageously removed continuously via the discharge opening with the permeate.
  • the sorting by suitable choice of the parameters of the device equally be carried out such that the desired product is discharged and collected through the drain opening, whereas the not attributed to the desired product particle fraction is collected radially outward.
  • the diameter of the permeate space which may in particular have a substantially cylindrical shape, can be varied.
  • the pressure difference between the permeate space and the space outside the entrance surface can be varied to affect the volume flow through the entrance surface into the permeate space.
  • the sorting result can be influenced in this way.
  • permeate channels extending essentially in the radial direction in the direction of the drain opening can be formed within the permeate space.
  • the removal means are configured as a drain opening for the flow of permeate from the permeate space. In this embodiment of the invention, therefore, the removal or collection of the accumulating in the radial inner region particles.
  • the removal means are arranged to surround the filter means substantially radially and preferably as of the filter element
  • sampling means as arranged on the outer edge collecting container with a
  • Hollow cylinder shape can be configured.
  • the inner circumferential surface of the hollow cylinder is designed according to this embodiment open to the radially adjoining permeate.
  • constructed means for emptying the same may be present.
  • a start-up flow can be generated in the direction of the drain opening within the permeate space, which generates the force ratio between the drag force generated by the permeate flow and the influence the centrifugal force acting on the particles due to the rotation.
  • a permeate flow to generate a state are formed, in which in the region of the drain opening and / or within a communicating with this drain line, a lower pressure than in the permeate space.
  • a pump can be arranged within the scope of the invention, for example within the hollow shaft and / or with this communicating.
  • the means for generating a Permeatströmung at least one arranged at a radial distance from the axis of rotation in the permeate inlet space for supplying a substantially particle-free
  • Inflow opening has filter means and the permeate space is arranged to connect via the filter means with the suspension to be processed.
  • this measure to generate the
  • Permeate flow in the radial direction required liquid to be sorted suspension to be taken.
  • a filter means are in particular metal mesh, ceramic membrane and / or
  • Teflon membranes suitable, through which virtually no particles are transmitted.
  • the inflow opening is formed as, in particular annular, recess in the inlet surface.
  • a filter medium such as Metallallsiebgewebe and / or Teflon membrane
  • Entry surfaces of the filter element are fed.
  • Device comprise the means for rotating the filter element a hollow shaft, wherein the drain opening is designed to connect the permeate space with the interior of the hollow shaft.
  • Value product attributed particle fraction are spatially combined by means of the permeate on the hollow shaft.
  • the hollow shaft preferably has corresponding openings or recesses in the region of the permeate space.
  • the entry surface may be covered with a classification screen.
  • this measure provides a
  • Permeate space Permeate space, radial extent of the permeate space, and so on.
  • Section of the invention be configured neither for suspension still for particle-free liquid permeable or permeable.
  • Measure according to the invention advantageously allows a targeted choice of the radial distance interval to the axis of rotation and arranged there drain opening of entering the permeate permeate bwz. in these over the entrance surface entering particle-free
  • Liquid flow for generating the radial permeate flow It is particularly favorable if in the context of the invention
  • Inlet opening is arranged radially on the outside of the classifying means adjacent to the inlet surface. This arrangement ensures within the scope of the invention that the radial permeate flow which is generated by the inflow opening exerts the drag force with respect to all permeate entering the permeate space via the inlet surfaces.
  • a targeted control of the sorting is within the scope of the invention advantageously possible if the drive means are designed variable speed.
  • the critical density is understood as the density which denotes the point of separation between particle fractions which accumulate in the radial outer region of the permeate space and those which are discharged via the discharge opening with the permeate.
  • the force of gravity will least affect the sorting, so that substantially the same sorting of the particle freezing takes place in all radial directions regardless of the angle.
  • a bottom surface of the filter element delimiting the permeate space downwards is configured sloping downwards in the radial direction from the outside in the direction of the discharge opening, a further influencing of the critical density is obtained. Because the component of gravity, which acts radially inward due to the constraint effect of the bottom surface, counteracts the centrifugal force in addition to the drag force.
  • the object underlying the invention is likewise achieved by a method for sorting particle freezing, wherein a suspension containing the particle fractions is passed through a, preferably with classifying agents covered, inlet surface into a permeate space of an axis aligned perpendicular to the entry surface rotating at a speed filter element and wherein the permeate directed into the permeate space is removed from the permeate space in the region of the axis of rotation of the filter element.
  • a method for sorting particle freezing wherein a suspension containing the particle fractions is passed through a, preferably with classifying agents covered, inlet surface into a permeate space of an axis aligned perpendicular to the entry surface rotating at a speed filter element and wherein the permeate directed into the permeate space is removed from the permeate space in the region of the axis of rotation of the filter element.
  • Embodiment of the method according to the invention available when the speed is varied.
  • a suspension containing the particle fractions is prepared in a liquid which exhibits a viscosity selected as a function of the particle fractions to be sorted. Since the viscosity of the liquid influences the flow behavior of the particles within the liquid of the suspension and in this way the drag force counteracting the centrifugal force, it can be controlled by these
  • a plurality of devices according to the invention can be connected in series such that the permeate discharged via the outlet opening of a first device according to the invention is fed to a further device according to the invention.
  • the filter element of the further device according to the invention and the parameters which determine the sorting in the permeate space of the further device are in accordance with this embodiment of the invention the particle fractions of the sequence of the first invention
  • Figure 1 Schematic representation in a lateral
  • FIG. 1 shows a plate filter 1 according to the invention.
  • the plate filter 1 consists of a cylindrical
  • Filter element 2 which at the top and bottom one each
  • the entrance surface 3 is substantially circular. Both entry surfaces 3 are aligned horizontally. Both inlet surfaces 3 are covered over the entire extent with a sieve 5, which causes a classification of the suspension 4.
  • the filter element 2 consists of a support fabric, which is not visible in the schematic FIG. 1, which forms a permeate space 6 between the entry surfaces 3 covered by the screens 5.
  • Filter element 2 centrally rigidly connected to a hollow shaft 7.
  • Hollow shaft 7 is interrupted in the region of the permeate space 6 in order to form a drain opening 8 from the permeate space. Due to the horizontal orientation of the inlet surfaces 3 of the filter element 2, the hollow shaft 7 is oriented in the vertical direction, so that a transport of permeate in the interior of the hollow shaft 7 by the arrow 9
  • the drag force in addition to or alternatively to gravity can also be caused by the fact that in the region of the drain opening 8 and / or within the hollow shaft 7, a lower pressure prevails than in the permeate 6.
  • a lower pressure prevails than in the permeate 6.
  • the arrow 9 is not only interpreted as gravity but can in particular indicate a pressure gradient in the direction of lower pressure.
  • the pressure difference can alternatively by means of a within the
  • the pump can generate an increase in pressure inside the container 10, so that the pressure inside the container 10 is greater than the pressure inside the hollow shaft 7.
  • the pressure gradient produced then leads to a permeate flow through the sieve discs 5, which in turn leads to a drag force, in particular on the particles contained in the Suspension works.
  • an extraction by means of, for example, a vacuum pump on the side of the outlet opening 21 done to produce a pressure gradient.
  • the hollow shaft 7 is led out of the container 4 containing the suspension 4. In principle, however, can be provided in the context of the invention, a return of the permeate in the suspension 4.
  • the container 10 has an inlet opening 20, shown only schematically, and also an outlet opening 21, which is also shown only schematically.
  • the permeate space 6 is made permeable on the outer jacket surfaces 11 thereof for permeate. Adjacent to the outer circumferential surfaces 11, an annular collecting container 12 is attached. A direction of rotation of the hollow shaft 7 and thus the entire
  • Filter element 2 is indicated by the directional arrow 13.
  • FIG. 1 to illustrate the mode of operation of the device, a valuable particle 14 is shown, which due to the effect of the centrifugal force, due to the rotation of the hollow shaft 7 and thus of the entire plate filter 1 due to the density of the valuable particles 14 radially outwardly in the direction of the collecting container 12th is moved.
  • a non-valuable particle 15 is shown, which, as indicated by the arrow, is accelerated radially into the hollow shaft 7 in the direction of the discharge opening 8 due to its lower density relative to the valuable particle 14.
  • the acceleration of the non-valuable particles 15 takes place by a drag force, which of a radial permeate flow 16 in the direction of the inside
  • Rotary axis arranged drain opening 8 is caused.
  • this drag force due to the permeate flow 16 outweighs the centrifugal force caused by the rotation, which acts in the opposite direction in the direction of the collecting container 12.
  • These conditions are in the case of the valuable particles 14 exactly the opposite, since there the centrifugal force outweighs in the direction of the collecting container 12.
  • FIG. 2 shows another preferred embodiment of a plate filter 17 according to the invention.
  • each entrance face 3 of the cylindrical filter element 2 is only partially covered by a sieve 5.
  • the screen 5 is not designed essentially as a disk, as in the case of FIG. 1, but as a ring.
  • the inner radius n of the annular screen 5 is preferably 1 mm, whereas the outer radius r a is 65 per cent of the radius r F of the filter element 2.
  • a circular inner region 18 on the entrance surface 3, whose radius is preferably 1 mm, is designed so that it is not permeable to both the continuous and the disperse phase.
  • Plate filter 17 according to Figure 2 is followed on the inlet surface 3 a pure filter ring 13 made of fine metal mesh fabric or designed as a Teflon membrane and / or ceramic membrane and leaves substantially no particles.
  • the annular clean filter ring 19 preferably has an inner radius which corresponds to the outer radius r a of the screen 5 and an outer radius which is 99 per cent of the radius r F of the filter element. Through the pure filter ring 19 enters a substantially particle-free
  • Permeate stream 16 which forms in the direction of the drain opening 8 in the radial direction.
  • the cover of the entry surface 3 in succession radially from inside to outside with a non-permeable inner region 18, a ring surrounding the inner region 18 sieve filter 5 and an annular sieve 5 enclosing clean filter ring 19 allows compared to the plate filter 1 shown in Figure 1 a targeted and stronger expression the permeate flow 16 to a better
  • a further sorting takes place according to the invention by the interaction of a centrifugal force and a drag force caused by the permeate flow 16 and acting in the opposite direction to the centrifugal force.
  • the collecting container 12 allows the collection and discharge of valuable particles 14th LIST OF REFERENCE NUMBERS

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)

Abstract

L'invention concerne un dispositif (1, 17) destiné à la séparation de fractions de particules (14, 15) d'une suspension (4), comprenant un élément de filtre (2) délimitant une chambre à perméat (6), doté d'au moins une surface d'entrée (3) pour les suspensions (4), d'éléments d'entraînement (7) pour la rotation de l'élément de filtre (2) à une vitesse de rotation autour d'un axe de rotation ainsi que d'une ouverture d'évacuation (8) disposée dans la zone de l'axe de rotation pour l'évacuation du perméat de la chambre à perméat (6). Ledit dispositif permet une séparation rapide et peu onéreuse de fractions de particules particulièrement fines de suspensions grâce à la présence de moyens de prélèvement (12), servant à récupérer et/ou à prélever du perméat de la chambre de perméat (6), qui sont prévus dans un volume partiel externe de la chambre de perméat (6) se trouvant à une certaine distance radiale de l'axe de rotation.
PCT/EP2011/000891 2010-03-08 2011-02-24 Dispositif et procédé pour la séparation de fractions de particules Ceased WO2011110285A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010709.3 2010-03-08
DE201010010709 DE102010010709B3 (de) 2010-03-08 2010-03-08 Vorrichtung und Verfahren zum Abtrennen von Partikelfraktionen

Publications (1)

Publication Number Publication Date
WO2011110285A1 true WO2011110285A1 (fr) 2011-09-15

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ID=43928864

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/000891 Ceased WO2011110285A1 (fr) 2010-03-08 2011-02-24 Dispositif et procédé pour la séparation de fractions de particules

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DE (1) DE102010010709B3 (fr)
WO (1) WO2011110285A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739914A (en) * 1970-08-27 1973-06-19 S Moatti Self-cleaning filter elements
US4717485A (en) * 1985-01-08 1988-01-05 Brunsell Zahra K Multi-phase separator with porous filter disks
EP1433511A1 (fr) * 2002-12-19 2004-06-30 Utisol Technologies AG Dispositif de filtration
WO2008009019A1 (fr) * 2006-07-14 2008-01-17 University Of Florida Research Foundation, Inc. Classificateur de cônes de rotation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH396774A (de) * 1962-03-01 1965-07-31 Cham Ag Maschf Filterzentrifuge
SE316147B (fr) * 1968-10-07 1969-10-20 Nordstjernan Rederi Ab
SE469599B (sv) * 1992-01-28 1993-08-02 Celleco Hedemora Ab Foerfarande och anordning foer separering av fibersuspensioner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739914A (en) * 1970-08-27 1973-06-19 S Moatti Self-cleaning filter elements
US4717485A (en) * 1985-01-08 1988-01-05 Brunsell Zahra K Multi-phase separator with porous filter disks
EP1433511A1 (fr) * 2002-12-19 2004-06-30 Utisol Technologies AG Dispositif de filtration
WO2008009019A1 (fr) * 2006-07-14 2008-01-17 University Of Florida Research Foundation, Inc. Classificateur de cônes de rotation

Also Published As

Publication number Publication date
DE102010010709B3 (de) 2011-09-08

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