Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D33/00—Filters with filtering elements which move during the filtering operation
  • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
  • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D33/00—Filters with filtering elements which move during the filtering operation
  • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
  • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
  • B01D33/23—Construction of discs or component sectors thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D33/00—Filters with filtering elements which move during the filtering operation
  • B01D33/29—Filters with filtering elements which move during the filtering operation the movement of the filter elements being a combination of movements
  • B01D33/31—Planetary movement
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D33/00—Filters with filtering elements which move during the filtering operation
  • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
  • B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D33/00—Filters with filtering elements which move during the filtering operation
  • B01D33/80—Accessories
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
  • B01D35/30—Filter housing constructions
  • B01D35/301—Constructions of two or more housings

Definitions

• the invention relates to a device for filtering liquids, comprising at least one rotor rotatably driven about an axis of rotation with an attached support device for spaced from the axis of rotation disc-shaped filter elements whose disc surfaces form the filter surface, wherein a plurality of the filter elements on a part the support device forming profile tube is assembled into a filter pack.
• Such known devices comprise a rotor as a stirring body whose stirring elements are formed by tubular, vertical flowed filter elements, a container, means for introducing a liquid to be filtered into the container, a container outlet for unfiltered from the container to be derived liquid and at least one rotatably drivable around the container axis rotor with a hollow shaft mounted in an end wall and an attached support for arranged with a clearance to the container axis or rotating about its own axis filter elements, the inside of the carrier and the hollow shaft from the container as a derivative for filtered Liquid discharges.
• the core is a sealed filter container in which one or more rotating slewing rings are driven by motors.
• the filtered liquids are collected in the rotor starting from tubular but also disk-shaped od.
• Filter elements AT 503 567 A
• the filter modules are mounted on the rotor and sealed against prevailing high pressures in the container.
• a rotation of larger horizontally oriented and impinged filter surfaces over the rotor radius leads to an extreme scattering in the overflow conditions, the transmembrane pressure and undesired shearing or pressure peaks.
• the suspension concentrate is then emptied through the container outlet or continuously drained during operation.
• the invention has for its object to provide a device of the type described, which allows simple means an improved filter performance.
• the invention solves this problem in that the, preferably central, disc planes of the filter elements are arranged on at least one axis perpendicular to the profile tube axis inclined on the profile tube, that include the disc planes with the profile tube axis an angle that is not equal to 90 °.
• the filter discs can be inclined in or against the direction of rotation. But it is also a combination of in or against the direction of rotation inclined filter elements possible, which are associated with one or more profile tubes.
• the inclination of the filter elements causes a helical flow in a container receiving the filter pack and thus requires a flow movement in the vertical direction, which is superimposed on the rotational movement.
• dynamic membrane processes the necessary cross-flow on the filter membrane surface is achieved by movement of the membrane surface through the liquid to be filtered.
• the size-separating effect of the membrane pores leads to a concentration of certain substances close to the membrane surface.
• This concentration must be compensated for the continuous filtration by continuous supply and mixing with less contaminated fluid.
• the centrifugal action of the rotation may result in additional concentration in the form of density-dependent phase formations.
• the concentration compensation can then be reduced by supplying less-loaded liquid. This effect can occur in particular in the interspaces of adjacent filter element pairs, the disk-shaped filter elements stacked on top of one another to form filter modules.
• these filter elements are arranged inclined on profile tubes. By tilting the filter elements, adapted to the respective direction of rotation and speed and adapted to the disc distances, the flow through the device and the flow around the filter elements can be controlled with freshly supplied fluid or membrane surfaces remote and thus less concentrated fluid.
• the disc planes are inclined about an axis perpendicular to the profile tube axis, preferably the axis of rotation intersecting axis against the direction of rotation of the filter elements and / or inclined to the radius of rotation transversely to the direction of rotation.
• any orientation of the inclination with respect to the direction of rotation can be adjusted.
• a separate rotary drive could be provided for the profile tubes.
• Particularly advantageous conditions arise when the disc planes are arranged at a right angle between the disc planes and the profile tube by 1 to 15, preferably to 6 °, in particular by 2 to 4 °, more preferably inclined by 3 ° on the profile tube.
• the filter elements are tilted by approximately 3 °, this can cause the flow to continue into the respective next higher row of disks of the next filter module and, in the end, the flow can be conducted spirally upwards over the entire rotor row, resulting in an additional circulation effect causes the liquid to be filtered in the device.
• the optimum angle of inclination for helical circulation movement is described in a container with 3 °. In fact, however, this optimum of 3 °, in which the helical movement is achieved by a filter module adjacent to the next slice plane, depends in particular on the distance between the filter elements in the module and the distance between adjacent modules.
• the filter elements in the region of the aperture may have the function of spacers between the filter surfaces of adjacent filter elements receiving annular projections, the profile tube facing shell inner surfaces determine the inclination of the filter elements on the profile tube or the filter elements are in the region of the aperture between the filter surfaces of adjacent filter elements annular spacers associated with the profile tube facing shell inner surfaces determine the inclination of the filter elements on the profile tube.
• At least two rotors are provided around the axis of rotation, optionally three or more rotatably driven rotors, wherein the individual rotors associated filter elements are arranged inclined on the profile tube so that they impart an axially parallel flow component to a filtrate and wherein the fluid may be rectified or oppositely directed by the rotors impressed flow components.
• the inclination of the filter elements, in particular filter discs, and their helical formation on the rotor ring or on the rotor rings, which are formed by the filter packs, leads to an axial pumping action for the liquid in the container, depending on the inclination of the filter discs and direction of rotation.
• the inclination of the filter discs and their helical formation on the rotor ring or on the rotor rings causes a pumping action for the liquid depending on the inclination of the filter discs and the direction of rotation of the rotor or the rotors to a container end face. Since this process usually takes place in a closed filter container, without corresponding relief measures as a result of the inclination of the filter discs, the direction of rotation of the rotor ring or the rotor rings and the resulting pumping action to a container end surface can lead to a congestion of the fluid and pressure increase, which is a corresponding Concentration hindered.
• This obstruction of the concentration exchange can be prevented by connecting the bottom and lid of the filter container with a bypass line dimensioned according to the pumping action of the helical flow. This allows a vertical flow in the container.
• At least one connection opening may be provided in the region of both container end faces or in the vicinity of both container end faces, wherein the outlet-side connection opening of one container is connected via a connecting line to the inlet-side connection opening of a further container.
• a fluid flow control valve and / or a delivery pump are arranged in the bypass pipe and / or in the connecting line.
• the invention also relates to disc-shaped filter elements which have an opening forming a receptacle and whose disc surfaces form a filter surface for an aforementioned device.
• the invention is not limited to use in said devices.
• the ring axis with an, preferably central, disc plane includes an angle which is not equal to 90 °, the disc plane of a right angle between the disc plane and inner ring axis to For example, 1 to 15, preferably to 6 °, preferably by 2 to 4 °, in particular by 3 °, is inclined differently.
• FIG. 1 shows a device according to the invention in side view
• FIG. 2 is an enlarged cross-sectional view of a portion of the device of FIG.
• FIG. 3 shows a construction variant of the device of Fig. 2
• FIG. 4 is an enlarged spacer of FIG. 2 in plan view
• FIG. 5 shows a spacer of FIG. 4 in cross-section
• FIG. 6 shows a construction variant of the device arranged in a container
• Fig. 7 shows the container with bypass line
• a device 1 for filtering liquids comprises at least one rotor 3, which is rotatably drivable about a rotation axis 2 and has a carrying device 4 fastened thereto for disk-shaped filter elements 5 arranged at a distance from the rotation axis 2 whose disk surfaces 6 form the filter surface.
• Filtered liquid is discharged via the interior of the filter elements 5 via the support device 4 and the rotor 3 from the container.
• It is a plurality of the filter elements 5 on a part of the Tragvor-direction 4 forming profile tube 7 is assembled into a filter pack, for which the filter elements 5 have a penetrated by the profile tube 7 opening 8, which forms a receptacle for the profile tube 7.
• the interior of the filter and the profile tube interior are fluidly connected, for example via holes 9 in the profile jacket. flow-connected.
• the central disk planes 1 0 of the filter elements 5 are arranged on the profile pipe 7 so that the disk planes 10 and the profile pipe axis 7 enclose an angle ⁇ that is not equal to 90 ° about at least one axis perpendicular to the profile pipe axis, the disk planes 10 preferably facing the direction of rotation of the filter elements are inclined.
• any orientation of the inclination with respect to the direction of rotation and / or the radius of rotation can be adjusted.
• a separate rotary drive for the profile tubes 7 may be provided.
• the disc planes are arranged at a right angle between disc planes and profile tube inclined by 3 ° on the profile tube and is the drawn angle ⁇ thus 87 ° and the angle ß 93 °.
• This has the effect that fluid to be filtered continues through the flow in the container into the respective next row of disks of the next filter module and thus in the end the flow can be conducted upwards in a spiral over the entire rotor row, which causes an additional circulation effect for the liquid to be filtered in the apparatus causes.
• This effect is indicated in Fig. 1 by the dot-dash line.
• the filter elements 5 in the region of the opening between the filter surfaces 6 adjacent filter elements 5 annular spacers 1 1 are assigned, the profile tube 7 facing shell inner surfaces or their ring axes determine the inclination of the filter elements 5 on the profile tube 7.
• the spacers are equipped with sealing rings 12.
• a portion of the filter elements 5 forming annular projections 13 are provided, the profile tube 7 facing shell inner surfaces or their ring axes, the inclination of the filter elements 5 on the profile tube 7 determine.
• the filter elements 5 is equipped with only one of a filter surface 6 associated approach 13 or as in the embodiment with two approaches, is the skilled person.
• the filter elements 5 are arranged secured against rotation on the profile tube 7, including, for example, a groove 14 spring 15 connection is provided.
• Other types of seals such as beads, grooves and springs and the like. are possible.
• the invention is by no means limited to the illustrated embodiments. In particular, meaningful combinations of the embodiments are possible at any time.
• the filter elements 5 assigned to the individual rotors 3 are arranged inclined on the profile tube 7 in such a way that they cause an axis-parallel flow to a liquid to be filtered. imprinting mungskomponente, wherein the fluid from the rotors 3 impressed flow components can be rectified or directed oppositely.
• the rotors 3, 3 ' and 3 " can be driven in different ways at different rotational speeds or directions of rotation in order to achieve a desired fluid flow in a container 20.
• the rotor 3 ' can be stationary, ie as a stator, be formed.
• connection opening 23 is provided in the region of both container end faces 21 or in the vicinity of both container end faces 21 on the container peripheral casing 22, which at least two connection openings 23 via a bypass line 24 fluidly connected are.
• the choice of the number of required bypass lines 24 is the expert as well as the choice of the arrangement of the connection openings 23, which may be provided in the area of container end faces 21 and / or in the vicinity of both container end faces 21. It is thus also possible to provide a connection opening 23 in the region of a container end face 21 and the other connection opening 23 in the vicinity of the other container end face on the container peripheral jacket 22.
• connection opening 23 is provided in the region of both container end faces 21 or in the vicinity of both container end faces 21, wherein the outlet side connection opening 23 of the one container 20 via a connecting line 25 to the inlet side connection opening 23 of another container 20 is connected.
• four containers 20 are connected in series, wherein the outlet-side connection opening 23 of the last container 20 in the series is in turn connected via a connecting line 25 to the inlet-side connection opening 23 of the first container 20.
• a fluid flow control valve 26 and / or a delivery pump may be arranged in the bypass line 24 and / or in the connecting line 25.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Centrifugal Separators (AREA)
• Separation Using Semi-Permeable Membranes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46799875

Family Applications (1)

Country Status (9)

Families Citing this family (18)

Citations (2)

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• 2011
  • 2011-06-29 AT ATGM363/2011U patent/AT12648U1/de not_active IP Right Cessation
  • 2011-12-20 EP EP11810998.2A patent/EP2726168A1/de not_active Withdrawn
  • 2011-12-20 US US14/125,653 patent/US20140102972A1/en not_active Abandoned
  • 2011-12-20 JP JP2014519338A patent/JP2014522719A/ja active Pending
  • 2011-12-20 BR BR112013033650A patent/BR112013033650A2/pt not_active Application Discontinuation
  • 2011-12-20 CA CA2840247A patent/CA2840247A1/en not_active Abandoned
  • 2011-12-20 WO PCT/AT2011/050048 patent/WO2013000002A1/de not_active Ceased
  • 2011-12-20 KR KR1020137034660A patent/KR20140035450A/ko not_active Withdrawn
• 2013
  • 2013-12-23 ZA ZA2013/09734A patent/ZA201309734B/en unknown

Patent Citations (2)

Non-Patent Citations (1)

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