WO2004110587A1 - Feed device for filter presses - Google Patents

Feed device for filter presses Download PDF

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Publication number
WO2004110587A1
WO2004110587A1 PCT/EP2004/005760 EP2004005760W WO2004110587A1 WO 2004110587 A1 WO2004110587 A1 WO 2004110587A1 EP 2004005760 W EP2004005760 W EP 2004005760W WO 2004110587 A1 WO2004110587 A1 WO 2004110587A1
Authority
WO
WIPO (PCT)
Prior art keywords
plates
feed
outline
joined together
feed device
Prior art date
Application number
PCT/EP2004/005760
Other languages
French (fr)
Inventor
Piero Bartalucci
Luciano Gentili
Original Assignee
Diemme S.P.A.
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
Priority claimed from ITRE20030059 external-priority patent/ITRE20030059A1/en
Priority claimed from ITRE20030058 external-priority patent/ITRE20030058A1/en
Application filed by Diemme S.P.A. filed Critical Diemme S.P.A.
Priority to EP04734841A priority Critical patent/EP1631366A1/en
Publication of WO2004110587A1 publication Critical patent/WO2004110587A1/en

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
    • B01D25/127—Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
    • 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
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/21—Plate and frame presses
    • B01D25/215—Construction of the filter plates, frames
    • 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
    • B01D25/302—Feeding devices ; Discharge devices specially adapted for chamber filter presses

Definitions

  • the present invention relates to a device for feeding the material to be filtered to a filter press with fixed or variable volume chambers.
  • Filter presses used in various industrial sectors comprising a plurality of movable vertical plates aligned along a horizontal axis.
  • Said plates lie between a fixed headpiece and a movable headpiece, and can be clamped together to define a plurality of filtration chambers.
  • Each plate comprises two recesses in the two opposing faces, to define a chamber between two mutually contacting plates, with which a filter cloth is associated at each recess to separate the solid part from the liquid part of the fluid or semifluid material to be filtered.
  • Said cloths substantially divide each chamber into a first region connected to an entry channel for the material to be filtered, and where said solid part accumulates, and a second region into which the filtered liquid passes, and which is connected for its evacuation to a channel provided within the body of the plates.
  • the entry channel for the material to be filtered comprises a conduit of circular cross-section inserted into a hole the walls of which are provided in two matching semicylindrical half-cavities present in one side of each plate.
  • the object of the present invention is to overcome the drawbacks of the known art within the framework of a simple, rational and reliable solution.
  • the invention attains said object by virtue of the characteristics defined in the claims.
  • the invention provides a feed device for a filter press provided with at least two plates to be clamped together to define a filtration chamber, usual filter cloths being interposed therebetween.
  • the device of the invention comprises a portion to be inserted between two half-cavities, each of which is present in one side of said at least two plates and presents a profile matching the outline of said portion.
  • the outline of that portion of the device to be received in said half-cavities is such that the tangents thereto at the plane in which said plates are joined together form an angle less than 180 degrees.
  • said angle is between 40 and 80 degrees.
  • the length of that portion to be inserted between said plate half-cavities is a function of the material to be filtered.
  • said portion can be as long as one side of the plate.
  • Figure 1 is a perspective view of the device according to the invention.
  • Figure 2 is a partial section through the device of the invention positioned between two spaced-apart plates.
  • FIG. 3 is the same as Figure 2 but with the plates closed.
  • Figures 4, 5 and 6 show some variants of the invention.
  • Figure 7 is a perspective view of a second embodiment of the device according to the invention.
  • Figure 8 is an enlarged partial view of Figure 7.
  • Figure 9 shows the section IX-IX of Figure 7.
  • Figure 10 shows the section IX-IX in a different operative stage.
  • FIGS. 1 to 6 show the feed device 1 , comprising a rear header 2, which at one end is connected to the delivery port feeding the material to be filtered, and at the opposite end communicates with three feed holes 3 for the material.
  • the holes 3 are provided in a portion 4 of the device 1 which is of elongate hexagonal shape in cross-section and branches from said header 2.
  • the number and shape of said holes can be different depending on the type of material to be filtered.
  • the portion 4 of the device 1 is inserted between two matching half- cavities 5, each of which is provided in one side of a plate 6.
  • Each plate 6, of known type presents two inner recesses 60 in opposing faces, to define a chamber 61 between two mutually contacting plates.
  • a filter cloth 7 for separating the solid part from the liquid part of the fluid or semifluid material to be filtered.
  • Figures 4, 5 and 6 show some variants of the portion 4 of the feed device, which in cross-section present a rhombus shape 40 or comprise two arcuate profiles 41 joined together at their ends. In both cases the angle ⁇ formed by the tangents to the profiles of the portion 4 at the plane in which the plates 6 are joined together is less than 180°.
  • the variants shown in Figures 5 and 6 instead of the holes 2 the variants shown in Figures 5 and 6 have a single elongate slot 42.
  • Figures from 7 to 10 relate to a second embodiment of the invention, which is described hereinafter, noting that in the description of said second embodiment, components identical to those already described in the first embodiment of the invention are indicated by the same reference numerals.
  • FIGSaid figures 7, 8, 9 and 10 show the feed device 10, comprising an elongate portion 11 , which is of elongate hexagonal shape in cross- section and is intended to be received in two matching half-cavities 12, each of which is provided in one side of a plate 13.
  • Each plate 13, of known type is substantially similar to the already described plate 6 and presents two inner recesses 60 in opposing faces, to define a chamber 61 between two mutually contacting plates.
  • a filter cloth 7 for separating the solid part from the liquid part of the fluid or semifluid material to be filtered.
  • the portion 11 is at least as long as a side of the plates 13 and collaborates to constitute, when the plates 13 are clamped together, the upper side of said chamber 61 ( Figure 10). Internally, the portion 11 is provided with a central header conduit 110 the purpose of which is to feed the material to be filtered to a plurality of equidistant branches 111 , which open at the lower edge of the portion 11.
  • Said header conduit 110 is connected to a pump, not shown, for feeding the material to be filtered.
  • the branches 111 distributed along the portion 11 advantageously ensure a uniform distribution of the material to be filtered within the chamber, and hence the complete and rapid filling of the chamber.
  • the portion 11 is of hexagonal cross-section, however in other embodiments the portion 11 can have any shape suitable for the purpose, for example a lozenge or rhombus shape, or can consist of two arcuate profiles joined together at their ends.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Filtering Materials (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

A feed device for filter presses provided with at least two plates to be clamped together to define a filtration chamber, at least one filter cloth being associated with each plate, said device comprising a portion to be inserted between two half-cavities, each of which is present in one side of said at least two plates and presents a profile matching the outline of said portion; the tangents to the outline of said portion of said feed device at the plane in which said plates are joined together form an angle less than 180°.

Description

DESCRIPTION
FEED DEVICE FOR FILTER PRESSES
TECHNICAL FIELD The present invention relates to a device for feeding the material to be filtered to a filter press with fixed or variable volume chambers.
PRIOR ART
Filter presses used in various industrial sectors are known, comprising a plurality of movable vertical plates aligned along a horizontal axis.
Said plates lie between a fixed headpiece and a movable headpiece, and can be clamped together to define a plurality of filtration chambers. Each plate comprises two recesses in the two opposing faces, to define a chamber between two mutually contacting plates, with which a filter cloth is associated at each recess to separate the solid part from the liquid part of the fluid or semifluid material to be filtered.
Said cloths substantially divide each chamber into a first region connected to an entry channel for the material to be filtered, and where said solid part accumulates, and a second region into which the filtered liquid passes, and which is connected for its evacuation to a channel provided within the body of the plates.
The entry channel for the material to be filtered comprises a conduit of circular cross-section inserted into a hole the walls of which are provided in two matching semicylindrical half-cavities present in one side of each plate.
When the plates are clamped together the channel hence lies inserted into said hole together with the filter cloths associated with each plate. The filter cloth is hence compressed into the semicylindrical half-cavities by the channel, so undergoing rapid wear, particularly at the sharp edge which forms between each half-cavity and the plane in which the contacting plates are joined together. This causes premature tearing of the cloths, which hence have to be replaced with a certain frequency. The object of the present invention is to overcome the drawbacks of the known art within the framework of a simple, rational and reliable solution.
DISCLOSURE OF THE INVENTION
The invention attains said object by virtue of the characteristics defined in the claims.
In particular, the invention provides a feed device for a filter press provided with at least two plates to be clamped together to define a filtration chamber, usual filter cloths being interposed therebetween. The device of the invention comprises a portion to be inserted between two half-cavities, each of which is present in one side of said at least two plates and presents a profile matching the outline of said portion. The outline of that portion of the device to be received in said half-cavities is such that the tangents thereto at the plane in which said plates are joined together form an angle less than 180 degrees. Preferably said angle is between 40 and 80 degrees.
According to the invention the length of that portion to be inserted between said plate half-cavities is a function of the material to be filtered. In certain applications said portion can be as long as one side of the plate. Such a configuration offers the advantage of ensuring complete filling of the chamber and homogeneous distribution of the material within it, while requiring much shorter chamber filling times which shorten the productive cycle.
DETAILED DESCRIPTION OF THE DRAWINGS
The constructional and functional characteristics of the invention will be more apparent from the ensuing description of two preferred embodiments thereof given by way of non-limiting example and shown in the accompanying drawings, Figure 1 is a perspective view of the device according to the invention.
Figure 2 is a partial section through the device of the invention positioned between two spaced-apart plates.
Figure 3 is the same as Figure 2 but with the plates closed.
Figures 4, 5 and 6 show some variants of the invention. Figure 7 is a perspective view of a second embodiment of the device according to the invention.
Figure 8 is an enlarged partial view of Figure 7.
Figure 9 shows the section IX-IX of Figure 7.
Figure 10 shows the section IX-IX in a different operative stage.
BEST MODE FOR CARRYING OUT THE INVENTION Figures from 1 to 6 show the feed device 1 , comprising a rear header 2, which at one end is connected to the delivery port feeding the material to be filtered, and at the opposite end communicates with three feed holes 3 for the material. The holes 3 are provided in a portion 4 of the device 1 which is of elongate hexagonal shape in cross-section and branches from said header 2.
In other embodiments of the invention the number and shape of said holes can be different depending on the type of material to be filtered. The portion 4 of the device 1 is inserted between two matching half- cavities 5, each of which is provided in one side of a plate 6. Each plate 6, of known type, presents two inner recesses 60 in opposing faces, to define a chamber 61 between two mutually contacting plates. With each recess 60 there is associated a filter cloth 7 for separating the solid part from the liquid part of the fluid or semifluid material to be filtered. With reference to Figure 3, it can be seen that when the plates are clamped together, the portion 4 of the device is received between the two half-cavities 5, with the cloths 7 interposed. As the angle α formed by the tangents to the profiles of the portion 4 at the plane in which the plates 6 are joined together is less than 180°, the cloths do not rest on sharp edges as in the known art, and are therefore not subjected to wear.
Figures 4, 5 and 6 show some variants of the portion 4 of the feed device, which in cross-section present a rhombus shape 40 or comprise two arcuate profiles 41 joined together at their ends. In both cases the angle α formed by the tangents to the profiles of the portion 4 at the plane in which the plates 6 are joined together is less than 180°. In addition, instead of the holes 2 the variants shown in Figures 5 and 6 have a single elongate slot 42.
Figures from 7 to 10 relate to a second embodiment of the invention, which is described hereinafter, noting that in the description of said second embodiment, components identical to those already described in the first embodiment of the invention are indicated by the same reference numerals.
Said figures 7, 8, 9 and 10 show the feed device 10, comprising an elongate portion 11 , which is of elongate hexagonal shape in cross- section and is intended to be received in two matching half-cavities 12, each of which is provided in one side of a plate 13. Each plate 13, of known type, is substantially similar to the already described plate 6 and presents two inner recesses 60 in opposing faces, to define a chamber 61 between two mutually contacting plates. With each recess 60 there is associated a filter cloth 7 for separating the solid part from the liquid part of the fluid or semifluid material to be filtered.
The portion 11 is at least as long as a side of the plates 13 and collaborates to constitute, when the plates 13 are clamped together, the upper side of said chamber 61 (Figure 10). Internally, the portion 11 is provided with a central header conduit 110 the purpose of which is to feed the material to be filtered to a plurality of equidistant branches 111 , which open at the lower edge of the portion 11.
Said header conduit 110 is connected to a pump, not shown, for feeding the material to be filtered. The branches 111 distributed along the portion 11 advantageously ensure a uniform distribution of the material to be filtered within the chamber, and hence the complete and rapid filling of the chamber. With reference to Figures 9 and 10, it can be seen that when the plates are clamped together, the portion 11 of the device is received in the two half-cavities 12, with cloths 7 interposed. As the angle α formed by the tangents to the cross-section through the portion 11 at the plane in which the plates 13 are joined together is less than 180°, the cloths do not rest on sharp edges as in the known art, and are therefore not subjected to wear.
In the illustrated embodiment the portion 11 is of hexagonal cross-section, however in other embodiments the portion 11 can have any shape suitable for the purpose, for example a lozenge or rhombus shape, or can consist of two arcuate profiles joined together at their ends.

Claims

1. A feed device for filter presses provided with at least two plates to be clamped together to define a filtration chamber, at least one filter cloth being associated with each plate, said device comprising a portion to be inserted between two half-cavities, each of which is present in one side of said at least two plates and presents a profile matching the outline of said portion, characterised in that the tangents to the outline of said portion of said feed device at the plane in which said plates are joined together form an angle (α) less than 180°.
2. A device as claimed in claim 1 , characterised in that the profile of said feeder portion is hexagonal.
3. A device as claimed in claim 1 , characterised in that the profile of said feeder portion is of rhombus shape.
4. A device as claimed in claim 1 , characterised in that the profile of said feeder portion comprises two arcuate profiles joined together at their ends.
5. A device as claimed in claim 1 , characterised in that said feeder presents at least one feed hole.
6. A device as claimed in claim 5, characterised in that said hole is in the form of a slot.
7. A device as claimed in claim 1 , characterised in that said portion
(11 ) is at least as long as one of the sides of said plates and collaborates to form one of the sides of said chamber.
8. A device as claimed in claim 8, characterised in that said portion (11 ) is associated with the upper side of said plates.
9. A device as claimed in claim 1 , characterised in that said portion comprises a header conduit (110) from which at least two branches extend to feed the material to be filtered.
10. A device as claimed in claim 9, characterised in that the branches (111 ) of said header conduit (110) open at the lower edge of said portion (11 ).
11. A device as claimed in claim 1 , characterised in that the tangents to the outline of said portion (11 ) in proximity to the plane in which said plates are joined together form an angle α preferably between 40 and 80 degrees.
PCT/EP2004/005760 2003-06-06 2004-05-26 Feed device for filter presses WO2004110587A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04734841A EP1631366A1 (en) 2003-06-06 2004-05-26 Feed device for filter presses

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITRE20030059 ITRE20030059A1 (en) 2003-06-06 2003-06-06 POWER SUPPLY FOR FILTER PRESS.
ITRE20030058 ITRE20030058A1 (en) 2003-06-06 2003-06-06 POWER SUPPLY FOR FILTER PRESS
IT2003A000058 2003-06-06
IT2003A000059 2003-06-06

Publications (1)

Publication Number Publication Date
WO2004110587A1 true WO2004110587A1 (en) 2004-12-23

Family

ID=33554229

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/005760 WO2004110587A1 (en) 2003-06-06 2004-05-26 Feed device for filter presses

Country Status (3)

Country Link
EP (1) EP1631366A1 (en)
RU (1) RU2357783C2 (en)
WO (1) WO2004110587A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007027033A1 (en) * 2007-06-08 2008-12-24 Larox Oyj Method for filtering a suspension and filter device
WO2023156704A1 (en) * 2022-02-18 2023-08-24 Roxia Oy A pressure filter apparatus, a filling shoe, a method for updating a pressure filter apparatus and a method for operating a pressure filter apparatus
US11969672B2 (en) 2018-04-11 2024-04-30 Sean R. Duby Discharge filter plate assembly for filter press

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807567A (en) * 1972-03-06 1974-04-30 Ishigaki Mech Ind Filter press
DE2739445A1 (en) * 1977-09-01 1979-03-08 Mitsubishi Heavy Ind Ltd Filter press having feed pipe supported on frame linkage - to permit free running of filter cloth
DE3505447A1 (en) * 1985-02-16 1986-08-21 Jörg Prof. Dipl.-Ing.(FH) 7072 Heubach Linser Filling apparatus for unfiltered medium in multi-stage pressure filters
DE3506898A1 (en) * 1985-02-16 1986-08-28 Jörg Prof. Dipl.-Ing.(FH) 7072 Heubach Linser Filling apparatus for unfiltered liquid in multi-stage pressure filters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807567A (en) * 1972-03-06 1974-04-30 Ishigaki Mech Ind Filter press
DE2739445A1 (en) * 1977-09-01 1979-03-08 Mitsubishi Heavy Ind Ltd Filter press having feed pipe supported on frame linkage - to permit free running of filter cloth
DE3505447A1 (en) * 1985-02-16 1986-08-21 Jörg Prof. Dipl.-Ing.(FH) 7072 Heubach Linser Filling apparatus for unfiltered medium in multi-stage pressure filters
DE3506898A1 (en) * 1985-02-16 1986-08-28 Jörg Prof. Dipl.-Ing.(FH) 7072 Heubach Linser Filling apparatus for unfiltered liquid in multi-stage pressure filters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007027033A1 (en) * 2007-06-08 2008-12-24 Larox Oyj Method for filtering a suspension and filter device
DE102007027033B4 (en) * 2007-06-08 2009-05-07 Larox Oyj Method for filtering a suspension and filter device
US11969672B2 (en) 2018-04-11 2024-04-30 Sean R. Duby Discharge filter plate assembly for filter press
WO2023156704A1 (en) * 2022-02-18 2023-08-24 Roxia Oy A pressure filter apparatus, a filling shoe, a method for updating a pressure filter apparatus and a method for operating a pressure filter apparatus

Also Published As

Publication number Publication date
RU2357783C2 (en) 2009-06-10
RU2005137078A (en) 2006-06-10
EP1631366A1 (en) 2006-03-08

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