WO2025082902A1 - Conduit collecteur de filtrat - Google Patents

Conduit collecteur de filtrat Download PDF

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Publication number
WO2025082902A1
WO2025082902A1 PCT/EP2024/078863 EP2024078863W WO2025082902A1 WO 2025082902 A1 WO2025082902 A1 WO 2025082902A1 EP 2024078863 W EP2024078863 W EP 2024078863W WO 2025082902 A1 WO2025082902 A1 WO 2025082902A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtrate
filter
collection channel
collecting channel
channel
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.)
Pending
Application number
PCT/EP2024/078863
Other languages
German (de)
English (en)
Inventor
Petra Ewert
Uwe Gradl
Alexis SPECK
Bernhard Salbaum
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.)
JVK Filtration Systems GmbH
Original Assignee
JVK Filtration Systems GmbH
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 JVK Filtration Systems GmbH filed Critical JVK Filtration Systems GmbH
Publication of WO2025082902A1 publication Critical patent/WO2025082902A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/164—Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/30—Feeding devices ; Discharge devices
    • B01D25/305—Feeding devices ; Discharge devices for discharging filtrate

Definitions

  • the present invention relates to a filter plate with a central filter surface and with a plate frame framing the filter surface in the manner of a ring and having a material thickness that is greater than that of the filter surface, wherein the plate frame has a filtrate collecting channel and the filter surface has a filtrate outflow region in at least one edge region, wherein the filtrate collecting channel is arranged adjacent to the filtrate outflow region in such a way that a filtrate from the filter surface is guided via the filtrate outflow region into the filtrate collecting channel.
  • Filter presses are commonly used for solid-liquid separation, particularly for liquid purification. These filter presses typically comprise one or more filter packs, each consisting of pairs of filter plates arranged side by side. Filter chambers are formed between the filter plates. For this purpose, the filter plates have a central filter surface and a thicker sealing edge surrounding the central filter surface, designed as a plate frame. In the filter press, the filter plates can be moved away from and towards each other, allowing the filter chambers to be opened and closed. Each filter chamber typically has at least one inlet and one outlet. The suspension to be filtered, commonly referred to as slurry, flows into the filter chamber via the inlet.
  • slurry The suspension to be filtered
  • the filter surface includes a filtrate outflow area, which is preferably arranged in one or more edge regions of the filter surface, for example the side edges or the corner regions.
  • the filter surface usually has a plurality of knobs or ribs, in the spaces between which a plurality of drainage channels are created that drain the filtrate.
  • the filter surface usually has a filtrate outflow area, in which the knobs and ribs can be arranged differently than in the rest of the filter surface to enhance the drainage effect.
  • a filtrate collection channel Adjacent to the filtrate outflow area, a filtrate collection channel is usually drilled into the plate frame, through which the filtrate is then directed into a central outflow channel.
  • a filtrate collection channel Adjacent to the filtrate outflow area, a filtrate collection channel is usually drilled into the plate frame, through which the filtrate is then directed into a central outflow channel.
  • individual solids undesirably pass through the filter cloth and, together with the filtrate, pass through the filtrate outflow area and are introduced into the filtrate collection channel. This can lead to blockage of the filter surface, the filtrate outflow area, and in particular the filtrate collection channel. While the filter surface and the filtrate outflow area can still be easily cleaned by brushing during maintenance work, this is only possible to a limited extent for the drilled filtrate collection channel and is very labor- and time-consuming.
  • the invention is therefore based on the object of providing a filter plate which can be cleaned of solid residues particularly quickly and easily, or even has a self-cleaning effect, so that the maintenance and cleaning intervals can be kept particularly short, or the intervals between the cleaning intervals can be extended as a result.
  • the filtrate collection channel is designed to be essentially open.
  • the invention is based on the idea that a particularly fast and efficient cleaning of the filter plate can be achieved if the filtrate collection channel is made particularly easy to access and if the cleaning can be carried out together with the filtrate outlet area, i.e. in particular with the same cleaning tools. Therefore, the filtrate collection channel in the Essentially open so that the filtrate collection channel can be brushed out together with the filtrate outflow area.
  • a further advantage of the open filtrate collection channel design is that it is significantly easier to manufacture compared to drilling through an entire side of the plate frame.
  • the open design makes it possible to mill the filtrate collection channel into the plate frame, for example, or to produce it using another machining process. It is also possible to incorporate the filtrate collection channel into the plate edge during production, for example, using appropriate blanks during casting or using appropriate computer-controlled specifications during additive manufacturing, such as 3D printing.
  • the open filtrate collection channel allows both the manufacturing processes of the filter plates and maintenance to be significantly simplified and improved.
  • the filter plates are usually suspended next to each other, which automatically aligns the plate frame accordingly and has an upper and a lower side. Due to gravity, the filtrate flows towards the lower side of the plate frame.
  • the filtrate outflow area is therefore also arranged in the area of the lower side of the plate frame, preferably over the entire side, but alternatively also over just a partial area or in the corners of the plate frame.
  • the filtrate collection channel is not horizontal, but at an angle ⁇ to the horizontal longitudinal axis of the filtrate outflow area, diagonally towards the edge of the filter plate. This means that the filtrate collection channel has a slight gradient towards the central outflow.
  • This gradient is preferably between 0.5 and 1%, which corresponds to an angle ⁇ of 0.29° to 0.57°. This slight gradient enables natural outflow of the filtrate from the filtrate collection channel due to gravity.
  • the angle is dimensioned in such a way that the flow velocity of the filtrate is dimensioned in such a way that the filtrate can carry possible solids particularly well, so that maintenance and cleaning intervals have to be carried out less frequently.
  • the solids discharge can also be increased by, in an advantageous embodiment, increasing the cross-section of the filtrate collection channel in the outflow direction. This results in an increase in the flow velocity at the beginning of the filtrate collection channel. This increase in the cross-section can be advantageously achieved by increasing the depth of the filtrate collection channel toward the outflow.
  • the groove is introduced perpendicular to the plate surface.
  • the main axis of the filtrate collection channel namely the axis extending from the opening of the filtrate collection channel to the filtrate collection channel base, is perpendicular to the surface of the plate frame or the filter surface.
  • this main axis can be inclined relative to the surface of the plate frame at an angle ß greater than 90°. This means that the filtrate collection channel base is shifted from the vertical in such a way that it is further away from the filtrate outflow surface, i.e. is inclined away from it.
  • the angle ß between the main axis and the surface of the plate frame or the filter surface is between 90° and 165°, particularly preferably between 125° and 145°.
  • the filter plate preferably comprises a removable cover element with a number of openings.
  • This cover element is designed to keep the filtrate collection channel open, but to cover individual areas in such a way that the filter cloth cannot penetrate into the filtrate collection channel.
  • the cover element can be designed, for example, as a coarse-meshed grid or individual openings arranged over the length distributed webs. For maintenance and cleaning purposes, the cover element can be removed to provide free access to the filtrate collection channel.
  • the advantages achieved with the invention extend to both the production and the use of the filter plates.
  • the filtrate collection channel can be manufactured particularly easily compared to previous solutions due to the open design, as the complex drilling of an enclosed channel is no longer necessary.
  • the filtrate can flow out over the entire open area and does not have to find its way through smaller holes or grooves. This leads to better and more complete drainage, which extends the time between cleaning and maintenance intervals.
  • the open filtrate collection channel is easier to access, which means that the less frequently required cleaning and maintenance intervals can be shortened, as cleaning is significantly simplified.
  • FIG. 1 a filter plate
  • FIG. 2 shows a section C of the filter plate according to FIG. 1,
  • FIG. 3 shows a section A-A through a filter plate with a vertical filtrate collection channel
  • FIG. 4 shows a section A-A through a filter plate with an obliquely formed filtrate collection channel
  • FIG. 5 shows an oblique section DD along the main axis of a straight filtrate collecting channel
  • FIG. 6 shows an oblique section DD along the main axis of a descending filtrate collecting channel
  • FIG. 7 shows a section C of a filter plate with a cover element
  • FIG. 8 shows a section C of a filter plate with a filtrate collection channel running obliquely to the edge.
  • the filter plate 1 shows a filter plate 1 according to the invention.
  • the filter plate 1 comprises a central filter surface 2 which is surrounded by a thicker plate frame 4.
  • the filter surface 2 is usually covered with a filter cloth (not shown) which is fastened and stretched to the plate frame 4.
  • the suspension to be filtered also referred to as slurry, is filtered by means of the filter cloth, with the solids being retained by the filter cloth.
  • the filtrate penetrates through the filter cloth and is discharged from the filter plate 2.
  • the filter plate has a filtrate outflow area 6.
  • the filtrate outflow area 6 extends in the embodiment according to FIG. 1 over the entire lower edge of the filter surface 2.
  • the filtrate outflow area 6 extends only over part of one or more sides, is arranged in one or more corners of the filter surface 2 or is not designed in any special way, but is only created arbitrarily by cutting into the filter surface 2 by the filtrate collecting channel 8 in all conceivable areas of the filter surface 2, as well as their boundary planes.
  • FIG. 2 shows a section C of FIG. 1. Even if the filter surface 2 is shown as a substantially planar surface in the figures of the exemplary embodiments, it has or can have a plurality of knobs 10.
  • This nub structure 10 forms drainage channels 12 for the drainage of the filtrate, particularly in the filtrate outflow area 6. In the exemplary embodiments shown in the figures, these drainage channels 12 are specifically created in the filtrate outflow area 6 using a modified nub 10 and rib structure 14. These drainage channels 12 guide the filtrate into a filtrate collection channel 8.
  • This filtrate collection channel 8 usually extends across the entire width of the filtrate outflow area 6 (here across the entire lower side of the filter surface 2) and is connected via an outlet channel 16 to a central outlet 18 for the filtrate. Even if the filter cloth filters out essentially all solids from the slurry, individual solid particles penetrate through and are discharged together with the filtrate. This can lead to deposits of the solid particles in the filtrate outflow area 6 or in the filtrate collection channel 8 and thus to blockages of the channels 8, 12, 16. For this reason, the filtrate collecting channel 8 is designed according to the invention as a groove which is open, whereby the cross section of the filtrate collecting channel 8 is increased and blockage becomes unlikely or, if it does occur, can be cleaned much more easily.
  • the main axis 20 of the filtrate collection channel 8 is designed obliquely relative to the filtrate outflow surface or the filter surface 2, such that the angle ß is greater than 90°, preferably in the range 125°-145°. This ensures a smooth and turbulence-free flow of the filtrate into the filtrate collection channel 8.
  • 5 and 6 show a cross-section DD along the main axis 20 of a filtrate collecting channel 8. Even though the illustration in FIGS. 5 and 6 shows an inclined filtrate collecting channel 8, corresponding to FIG. 4, the further features of FIGS. 5 and 6 now described can also be implemented with a vertical filtrate collecting channel 8, corresponding to FIG. 3.
  • FIG. 7 shows an exemplary embodiment of a cover element 24 which partially covers the filtrate collection channel 8.
  • the cover element 24 is comb-shaped, but can also be designed as a grid or in another form.
  • the cover element 24 according to FIG. 7 comprises a number of fastening elements 26 which can be released during maintenance, so that the filtrate collection channel 8 is exposed and can be easily cleaned.
  • FIG. 8 An additional configuration of the filtrate collection channel 8 is shown in the embodiment according to FIG. 8.
  • the filtrate collection channel 8 is inclined in the flow direction of the filtrate towards the edge of the filter plate 1.
  • the angle of the slope can be used to influence and optimally adjust the flow velocity.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention vise à rendre particulièrement rapides et aisés le nettoyage et l'élimination de résidus solides d'un plateau filtrant présentant une surface filtrante et un cadre de plaque, à épaisseur de matériau augmentée par rapport à la surface filtrante, lequel entoure la surface filtrante à la manière d'une couronne, le cadre de plaque comportant un conduit collecteur de filtrat et la surface filtrante présentant, dans au moins une zone marginale, une zone de sortie de filtrat, le conduit collecteur de filtrat étant disposé de manière adjacente à la zone de sortie de filtrat, de telle sorte qu'un filtrat est guidé de la surface filtrante jusque dans le conduit collecteur de filtrat en passant par la zone de sortie de filtrat. A cet effet, le conduit collecteur de filtrat est conçu essentiellement ouvert.
PCT/EP2024/078863 2023-10-16 2024-10-14 Conduit collecteur de filtrat Pending WO2025082902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023128296.4A DE102023128296A1 (de) 2023-10-16 2023-10-16 Filtratsammelkanal
DE102023128296.4 2023-10-16

Publications (1)

Publication Number Publication Date
WO2025082902A1 true WO2025082902A1 (fr) 2025-04-24

Family

ID=93432412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/078863 Pending WO2025082902A1 (fr) 2023-10-16 2024-10-14 Conduit collecteur de filtrat

Country Status (2)

Country Link
DE (1) DE102023128296A1 (fr)
WO (1) WO2025082902A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05103914A (ja) * 1991-05-10 1993-04-27 Kurita Mach Mfg Co Ltd フイルタプレスの圧搾板およびその圧搾膜
EP1140317B1 (fr) * 1998-11-12 2003-04-23 H. Strassburger GmbH. & Co. KG Systeme de filtration, procede de filtration et de nettoyage
DE102007027035A1 (de) * 2007-06-08 2008-12-11 Larox Oyj Filtervorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8806971U1 (de) * 1988-05-27 1988-08-04 Klinkau Besitzgesellschaft mbH, 8952 Marktoberdorf Rahmenmembran für eine Membranfilterplatte und damit ausgestattete Membranfilterplatte
DE19943584C2 (de) * 1999-09-13 2002-09-19 Lenser Filtration Gmbh & Co Filterplatte für eine Filterpresse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05103914A (ja) * 1991-05-10 1993-04-27 Kurita Mach Mfg Co Ltd フイルタプレスの圧搾板およびその圧搾膜
EP1140317B1 (fr) * 1998-11-12 2003-04-23 H. Strassburger GmbH. & Co. KG Systeme de filtration, procede de filtration et de nettoyage
DE102007027035A1 (de) * 2007-06-08 2008-12-11 Larox Oyj Filtervorrichtung

Also Published As

Publication number Publication date
DE102023128296A1 (de) 2025-04-17

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