Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/62—Regenerating the filter material in the filter
  • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
  • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/27—Cleaning; Purging; Avoiding contamination
  • B29C48/2725—Cleaning; Purging; Avoiding contamination of filters
  • B29C48/273—Cleaning; Purging; Avoiding contamination of filters using back flow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/50—Details of extruders
  • B29C48/69—Filters or screens for the moulding material
  • B29C48/691—Arrangements for replacing filters, e.g. with two parallel filters for alternate use
  • B29C48/6912—Arrangements for replacing filters, e.g. with two parallel filters for alternate use the filters being fitted on a single rectilinearly reciprocating slide
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/58—Component parts, details or accessories; Auxiliary operations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
  • B29C48/023—Extruding materials comprising incompatible ingredients
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/05—Filamentary, e.g. strands
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/50—Details of extruders
  • B29C48/69—Filters or screens for the moulding material
  • B29C48/693—Substantially flat filters mounted at the end of an extruder screw perpendicular to the feed axis

Definitions

• the invention relates to a filtration device for fluids, comprising a housing and at least:
• an inlet channel and an outlet channel in the Ge ⁇ housing are to bring in a production position in each case with at least one screen space in connection, wherein in a production position of the Siebmelelements each at least one inlet channel in the housing leads to each screen space and at least one outlet channel in the housing of each screen room leads away.
• each ⁇ wells comprise at least one filter element which dirt contained in the fluid, debris, or conglomerates separates. If the filter element is dirty, it must be replaced, for which purpose in a hole in the housing slidably mounted Siebangoelement can be moved to a Sieb ⁇ change position.
• the filter surface In order to increase the throughput which can be achieved with the filtration device, that is to say the filterable fluid volume per time, the filter surface usually has to be increased. There is the possibility of a larger size of the ge ⁇ entire filtration device, which, however, leads to a sharp increase in costs.
• filter units can be made through the stacked filter discs at the same opening area of the screen space size ⁇ re filter surfaces available. The latter units are not suitable for all media to be filtered.
• Another problem is the processing bayndli ⁇ cher fluids chemically change at longer residence times, in particular when they enter into the gap between Siebaelement and bore in the housing.
• the first general task is to increase the throughput in a filtering device of the type mentioned above and in particular to reduce local Ver ⁇ times of fluid fractions.
• the intermediate channels may not only be formed by slot-like grooves, but e.g. also through rows of holes.
• At least one inlet channel leads to each screen space, wherein the axis of symmetry of the group of inlet channels or their mouth areas is arranged on a first diameter line, and that lead from each screen space two outlet channels to ge ⁇ opposite sides of the Siebyelements, wherein the axis of symmetry of the group of Austrittskanä ⁇ len lies on a second diameter line, which is perpendicular to the first diameter line.
• the exit plane is perpendicular to it.
• the fluid flows simultaneously to diametrically opposite sides of the Siebreaelements, so that even in the second coordinate of the cross-sectional plane equilibrium is established.
• the respective longer and shorter intermediate channels Zvi ⁇ rule channels of both pairs are arranged on different sides of a first transverse axis and at the same time alternately on different sides of a longitudinal axis of the Siebraceelements and
• Fig. 1A shows a filtering device according to a first
• FIG. 1B shows the filtration device according to FIG. 1A in a second longitudinal sectional plane
• FIG. 3A shows a filtration device in the backwash position in a first longitudinal sectional plane.
• FIG. 3B the filter device according to FIG. 3A in the backwash position in a second longitudinal sectional plane
• FIG. 4A shows a filtering device shortly before or after
• Fig. 6A a filtering device according to a second
• FIG. 6B the filtration device according to Figure 6A in a second longitudinal sectional plane.
• FIG. 7A shows a filtering device in the backwashing position in a first longitudinal sectional plane;
• FIG. 8A the filter device in a screen change position in a first longitudinal section plane
• FIG. 8B the filter device according to FIG. 7A in the backwash position in a second longitudinal sectional plane
• Fig. 9 is a schematic perspective view ei ⁇ nes Sieblyelements for identifying the position of the cutting planes and the reference numerals indices.
• FIG. 1A shows a filtering device 100, which consists essentially of a housing 30 and two cylinder-bolt-shaped filter support elements 10, which are displaceably guided in bores of the housing, as basically known.
• a filtering device 100 which consists essentially of a housing 30 and two cylinder-bolt-shaped filter support elements 10, which are displaceably guided in bores of the housing, as basically known.
• only one Siebträ ⁇ gerelement 10 is shown; another is lower at the rea ⁇ len embodiment in a plane or arranged next to it, so that filtration can be maintained even if one of the Siebangomaschine is in a maintenance position.
• the housing 30 is shown cut in Figure 1A.
• the view is from above on the filter holder element 10 located in a cut housing bore.
• Fig. 9 indicates the positions of the cutting planes used below and the use of the indices in the following description.
• the cutting plane is as indicated by the rectangle in ge ⁇ dashed lines, so the view is from above on this cutting plane.
• the cutting plane is offset by 90 °, as indicated by the rectangle in dotted lines, the view is from left to right on the cutting plane.
• FIG. 1 illustrates a prior ⁇ ferred embodiment of the invention, in which equal pressure conditions prevail, which means that the Siebyelement 10 is held in all possible spatial directions relative to the housing 30 in scale to angle Chief positions and a concomitant blocking of the flow-through annular gap between sieve gerelement 10 and housing bore as a flow path for Lecka ⁇ flow to avoid.
• the Siebmelelement 10 is movable in the direction of a longitudinal axis 19 relative to the housing 30.
• two pairs of sieve chambers 11.1, 11.2 and 12.1, 12.2 are incorporated into the Siebaelement 10.
• the two Siebshadow 11.1, 11.2 and 12.1, 12.2 of each pair are mirror images of each other with respect to the longitudinal axis 19.
• the pairs of Sieb consult 11.1, 11.2 and 12.1, 12.2 turn are mirror images with respect to a transverse axis 18 is arranged ⁇ .
• the transverse axis 18 does not necessarily have to halve the length of the Siebspannelements 10, but it may also be positioned off-center on the Siebaelement 10.
• the transverse axis 18 represents an axis of symmetry in Be ⁇ train on the arrangement of the pairs of Sieb consult 11.1, 11.2 and 12.1, 12.2.
• the Siebshadow 11.1, 11.2 and 12.1, 12.2 are fed through inlet channels 31.1, 31.2, 32.1, 32.2, which lead through the housing 30 so that they run tangentially to the Siebaelement 10.
• the ends of the inlet channels 31.1, 31.2, 32.1, 32.2 run into the sieve chambers 11.1, 11.2, 12.1, 12.2, specifically on the dirty side of a filter element inserted there.
• the inlet channels 31.1, 31.2, 32.1, 32.2 each have the same distance with respect to a transverse axis 38 in the housing, which forms a central axis of the arrangement of Siebhoff ⁇ men 11.1, 11.2 and 12.1, 12.2 and in a production position congruent with the axis 18th the Siebyelements 10 is located.
• On opposite sides of the Siebyelements 10 are the inlet channels 31.1, 31.2, 32.1, 32.2 opposite. This arrangement leads to all-round balanced pressure and force conditions in the flow of the Siebluster.
• 14.1, 14.2 are formed, which extend oblong in the direction of the longitudinal axis 19.
• longitudinal axis 19 are each a longer intermediate channel 13.2, 14.1 and a shorter intermediate channel 13.1, 14.2 arranged.
• cross ⁇ axis 18 in turn are each a longer intermediate channel
• the housing-side outlet channels have the same cross-sectional shape as the intermediate channels 13.1, 13.2, 14.1, 14.2 and lie in the production position in Figure 1A just above it, so that they are not he ⁇ recognizable in Figure 1A.
• FIG. 1B shows the filter device 100 according to the invention in a sectional plane offset by 90 °, which is indicated by the line B-B in FIG. 1A.
• the dashed line represents ⁇ placed inlet channels 31.2, 32.2 in the housing, the Siebexcellent 11.2, 12.2 cut; the slot-shaped cutting zone is shown in solid lines.
• backwash channels 38.2, 38.3, 37.2, 37.3 which lead through the housing 30 to the Siebyele ⁇ ment 10 zoom and serve the removal of fluid on the dirty side of the filter elements when the Siebyelement 10 in the later still shown and be ⁇ written backwashing position is.
• the intermediate channels 13.2, 13.3, 14.2, 14.3 begin at about half the height of the sieve chambers 11.2, 12.2 and widen to the top of the Siebmelelements 10, so that they appear externally on the Siebyelement 10 as a slot (see Fig. 1A).
• the outlet channels 41.2, 41.3, 42.2, 42.3 are formed in the contact zone between Siebaelement 10 and housing bore. Before there verjün ⁇ gen them and then open out in the exemplary embodiment shown a filtration device 100 in cylindrical bores which lead from the housing 30 out.
• outlet channels 41.1, 41.2, 41.3, 42.1, 42.2, 42.3 are in the production position according to Figures 1A and 1B, the intermediate channels 13.1, 13.2, 14.1, 14.2 congruent in the Siebaelement 10.
• FIG. 2 shows a cross section through the filtration device 100 in a direction parallel to the transverse axis 18
• the fluid flows through the inlet channels 31.1, 31.2 through the housing 30 and enters the sieve chambers 11.1, 11.2, where it flows through the filter elements known per se, which may be formed, for example, as perforated metal sheets covered with metal braids .
• the intermediate channels 13.1 ... 13.4 the outlet channels 41.1 ... 41.4 opposite, which unite lower in the housing to outlet channels 40.1, 40.2, which lead out of the housing 30 out.
• FIGS. 3A and 3B show, in respective similar representations as in FIGS. 1A and 1B, a filtering apparatus 100 in which the filter holder element 10 has been displaced along its longitudinal axis 19 with respect to the housing 30 in order to assume a backwashing position.
• the upper left screen chamber 12.2 in FIG. 3A has no connection to the inlet channel 32.2 anymore on the dirty side.
• On the clean side there is a brief Kochschnei ⁇ tion of the intermediate channel 14.2 with the outlet channel 42.2.
• FIG. 3B it can be seen, with respect to the right-hand sieve space 11.2, that its intermediate passages 13.2, 13.3 are only in overlap with the right exit passages 41.2, 41.3, but that there is no connection to the left exit passages 42.2, 42.3.
• the Siebaelement 10 can be moved into a so ⁇ called screen change position, which is shown in Figure 5.
• the two left sieve stations 12.1, 12.2 are in this case freely accessible outside of the hous ⁇ ses 30th
• FIGS. 6A to 8B A second embodiment of a filtering device 100 'according to the invention is shown in FIGS. 6A to 8B.
• the arrangement of the cutting planes is similar to the illustration of the first embodiment. Also are similar features of the filtering device 100 'designated by the same reference numerals.
• the filter device 100 is located in the production position with the upper screen carrier element 10, in which fluid flows through all of the screen chambers 11.1, 11.2, 12.1, 12.2 at the same time.
• the Siebspannelement 10 has, as in the first embodiment also, two pairs of Sieb consult 11.1, 11.2 and 12.1, 12.2, which lie in mirror image with respect to the longitudinal axis 19.
• the pairs of suction chambers 11.1, 11.2 and 12.1, 12.2 in turn are arranged in mirror image with respect to a transverse axis 18.
• the sectional view according to FIG. 2 shows two inlet channels 31.1, 33.1, 31.2, 33.2, 32.1, 34.1, 32.2, 34.2, which act tangentially on each of the sieve chambers 11.1, 11.2,
• the channels arranged above and below the longitudinal axis lie directly opposite one another, in order to avoid the formation of torques acting on the screen carrier element 10.
• the other sectional view according to FIG. 6B shows the special profile of the additional, inner inlet channels 33.2, 34.2, which have been added to the first embodiment. From a common reference point in or on the housing 30, the pairs of inlet channels 31.2, 33.2 and 32.2, 34.2 branch off in a V-shape at an angle of approximately 15 °. This shape is easy to manufacture, but other courses of the two inlet channels are conceivable.
• the additional inlet channels 33. 33.2, 34.1, 34.2 doubling the flow cross-section, but beyond that no special function.
• FIGs 7a and 7B show the filtering device 100 'in the backwash position.
• the Siebyelement 10 is moved along its longitudinal axis to the left.
• Underneath is another Siebaelement 10 ', which is in production position, recognizable in the same housing 30.
• the backwashing channels 37.2, 37.3 which can be seen in FIG. 7B on the right side of the housing 30, are provided for the backwashing of the respective right-hand sieve chambers, for which purpose the sieve carrier element 10 is to be moved to the right.
• the successive backwash Siebsammlung to ver ⁇ different axial positions is advantageous because the output side pending fluid pressure then concentrated can act on only one filter element in a screen room and because the production flow less volume per unit of time is extracted as if both adjacent Siebschreib would simultaneously backwashed.
• FIGS. 8A and 8B The particular advantage of the second embodiment of the filtration device 100 'can be seen in FIGS. 8A and 8B:
• the flow path results as follows: The fluid flows via the inlet channels 32.1, 32.2 into the sieve chambers 11.1, 11.2 and can flow from there via the intermediate channels 13.1, 13.2 into the outlet channels 42.1, 42.2.
• a filtration device 100 ' which has only a single Siebmelelement 10, so at least 50% of the filter surface can be used even during the screen change.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Filtration Of Liquid (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46319783

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (5)

Citations (7)

Family Cites Families (3)

• 2011
  • 2011-06-27 DE DE102011051373.6A patent/DE102011051373B4/de not_active Expired - Fee Related
• 2012
  • 2012-06-19 JP JP2014517595A patent/JP5940150B2/ja active Active
  • 2012-06-19 EP EP12728284.6A patent/EP2723547B1/de active Active
  • 2012-06-19 WO PCT/EP2012/061755 patent/WO2013000772A1/de not_active Ceased
  • 2012-06-19 CN CN201280032313.4A patent/CN103635300B/zh active Active
  • 2012-06-19 US US14/128,849 patent/US9468873B2/en active Active

Patent Citations (7)

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