WO1997026974A1 - Filtre a disques - Google Patents

Filtre a disques Download PDF

Info

Publication number
WO1997026974A1
WO1997026974A1 PCT/EP1997/000231 EP9700231W WO9726974A1 WO 1997026974 A1 WO1997026974 A1 WO 1997026974A1 EP 9700231 W EP9700231 W EP 9700231W WO 9726974 A1 WO9726974 A1 WO 9726974A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
filter
filter according
shaft
ring
Prior art date
Application number
PCT/EP1997/000231
Other languages
German (de)
English (en)
Inventor
Josef Ziller
Original Assignee
Schenk Filterbau Gesellschaft mit beschränkter Haftung
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 Schenk Filterbau Gesellschaft mit beschränkter Haftung filed Critical Schenk Filterbau Gesellschaft mit beschränkter Haftung
Publication of WO1997026974A1 publication Critical patent/WO1997026974A1/fr

Links

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
    • B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
    • B01D29/41—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
    • B01D29/416—Filtering tables
    • 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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding

Definitions

  • the invention relates to a filter for sweat filtration of suspensions, in particular juice, wine, beer, chemical liquids or the like. According to the preamble of claim 1.
  • Such a disc filter is known from DE 35 29 706 C3, the unfiltrate is fed radially branching inlet channels via feed lines formed in the hub, which lead into a distributor ring space which is formed below the filter plate of a filter element. From this distributor ring space, the axially opposite filter element is flowed directly, as a result of which a uniform flow distribution is achieved in order to build up a homogeneous filter cake. The filtrate is discharged through filtrate drainage channels that lead to the center of the hub.
  • This well-known disc filter ensures good filtration results with a high degree of utilization of the filter aids.
  • the hub In order to ensure a flow-free supply of the unfiltrate for the precoat filtration, the hub must be of complex design.
  • the hub In the known disk filter, the hub is made from a solid ring disk. A large number of axial bores are to be drilled over the circumference thereof as a feed line for the unfiltrate, with feed channels from these individual bores for feeding the unfiltrate into the space between adjacent Branch off the beard filter elements. Since each axial bore of a hub has to connect liquid-tight to a congruent axial bore in the hub of an adjacent filter element, a sealing surface or a receiving groove for a sealing ring must be formed at the axial ends of the bore. Since the axial bores lie at a radial distance from the hub axis, the end faces of the axial bores can only be machined by milling with a head mill, which is very time-consuming and labor-intensive.
  • the invention is based on the object of designing a filter element for a disc filter in such a way that the hub to be threaded onto a shaft of the filter pack and lying in the center of a filter plate is simple to manufacture with little use of material and low processing outlay.
  • Both the inner ring and the outer ring are easy to manufacture, and the annular space formed between the inner ring and the outer ring can be used as a feed line due to the concentric arrangement with one another. It Therefore, the axial bores with the special sealing surfaces and the large number of sealing rings, which are otherwise to be formed to form the supply line for the unfiltrate, are eliminated.
  • the feed line is rotationally symmetrical to the hub axis, so that the machining of the end faces necessary for the pressure-tight connection to adjacent hubs of other filter elements is possible to form a sealing surface or a receiving groove for a sealing ring by turning. In this case, only two receiving grooves or corresponding annular sealing surfaces are to be produced on the respective end face.
  • the inner ring and the outer ring are preferably rigidly connected to one another by at least three radial bolts, the radial bolts being able to be easily fitted into corresponding bores in the inner ring and the outer ring.
  • a concentric and axially aligned rigid assembly of components of the inner ring and outer ring is created, which can be achieved by e.g. B. welding the bolts to the rings or z. B. is permanently fixed by a press fit.
  • the radial bolts which penetrate the inner ring in a liquid-tight manner and interact as a spacer with the shaft jacket, allow the hub to be aligned coaxially with the shaft.
  • a non-rotatable connection between the shaft and each individual filter element can also be achieved in a simple manner via the radial bolts abutting the shaft jacket.
  • the radial bolts are formed by hollow tubes, they can be used as filtrate drain channels penetrating the hub.
  • the end face of the radial bolt which is designed as a hollow tube and faces the shaft jacket bevelled at least in a partial area at an angle of preferably 45 ° to the shaft jacket.
  • FIG. 1 is a schematic representation of a partial section through a disc filter designed as a centrifugal filter
  • Fig. 2 in plan view a threaded on a shaft
  • FIG. 5 shows a section through the hubs of two filter elements lying one on top of the other along the line V-V in FIG. 4 with inlet channels shown offset;
  • FIG. 6 shows a partial section through a sleeve which delimits a distributor annular space.
  • the disc filter shown in FIG. 1 is intended for the filtration of liquids such as juice, wine, beer, chemical liquids and the like and is designed, for example, as a centrifugal cleaning filter.
  • This consists of a container 3 supported on legs 4 of a stand and closed by a removable cover 5 which is fixed pressure-tight on the container 3 by means of pressure closures 6.
  • a sight glass 7 is arranged on one side of the container 3.
  • an electric drive motor 8 with a fluid coupling 9 is provided in the exemplary embodiment, which drives a shaft 12 via an angular gear 10 and a shaft coupling 11, which extends coaxially to the vertical axis 2 of the container 3.
  • a drain pipe 19 is provided under the bottom 15 of the container 3, through which residual filtrate can be removed.
  • an obliquely downwardly directed pipe socket 20 with a shut-off valve 21 is arranged in the bottom 15 of the container 3 for draining off filtrate residues and filter aids.
  • a central drain connection 22 is connected to the cover 5 of the container 3, through which the cleaned liquid, the filtrate 23, is discharged.
  • the drain connector 22 is also formed as a bearing for the upper end of the shaft 12.
  • a vent 24 is also provided on the cover 5.
  • a filter packet 28 made of stacked, plate-shaped filter elements 25 is arranged in the container 3.
  • Each filter element 25 consists of a hub 26 arranged in the center of a filter plate 32, through the central opening 35 of which the shaft 12 projects.
  • the hub 26 consists of an inner ring 76 and an outer ring 86, which are rigidly connected to one another via radial bolts 77.
  • the radial bolts 77 preferably penetrate the inner ring 76 and protrude with an end section 78 into the central opening 35 of the hub 26.
  • a plurality of radial bolts 77 which are arranged at the same distance from one another, at least three radial bolts being provided for fixing the position of the hub 26 relative to the shaft 12;
  • six radial bolts 77 are arranged, which are at a circumferential angle of 60 ⁇ to one another.
  • Two radial bolts 77 each lie diametrically opposite to the shaft axis l? A.
  • the end sections 78 of the radial bolts 77 protruding into the hub opening 35 have the same length 1 and cooperate with the shaft jacket 12b in order to align the hub 26 coaxially with the shaft axis 12a, which is also the vertical axis 2 of the container 3.
  • the hub 26 is held centered on the shaft 12 by the projecting end sections 78 of the radial bolts 77; In the circumferential direction, the end sections 78 can cooperate with longitudinal ribs 12c of the shaft 12, which creates a rotationally fixed connection between the shaft 12 and the filter element 25 (FIG. 4).
  • the radial bolts 77 protrude up to the outer hub shell 27 into the outer ring 86 and are fixed there in a liquid-tight manner. Since the radial bolt 77 is also kept liquid-tight in the inner ring 76, the annular space 70 can be used as the feed line 36 which supplies the unfiltrate 18.
  • the unfiltrate is branched off through inlet channels 46 which are formed in the outer ring 86 and are shown schematically with their longitudinal axis in FIG. 2.
  • a circumferential sealing ring 64 and 65 is arranged on an axial end face 90 of the hub 26 on the inner edges of the annular space 70.
  • the essentially rectangular sealing rings 64 and 65 protrude beyond the end face 90 of the hub 26.
  • an essentially flat sealing ring 63 is arranged in the area of the outer edge of the outer ring 86, which can slightly protrude beyond the outer edge of the outer ring 86.
  • the sealing ring 63 is embedded in a countersink in the end face 91 of the hub 26.
  • the outer ring 86 is formed in its outer circumference with essentially three sections of different diameters.
  • the first section 71 which is the largest in diameter, holds a sleeve 60 which is essentially L-shaped in section and which surrounds the hub 26.
  • a foot section 66 and a section 72 with a reduced diameter it delimits a chamber 52 which is advantageously designed as an annular chamber running over the circumference of the hub. This chamber 52 serves to calm the inflowing unfiltrate.
  • Section 73 formed a ring step 75 on which the funnel-shaped inner edge 37 of a filter plate 32 is seated.
  • the inner edge 37 is welded onto the ring step 75, the annular disk-like filter plate 32 being at right angles to the hub axis 38.
  • the funnel-shaped inner collar 37 delimits, with the section 73 of the smallest diameter, a filtrate drainage space 39 which extends over the entire circumference of the hub 26 and is approximately triangular in cross section.
  • a drainage mat 33 rests on the filter plate 32 and is received on its inner edge in a countersink 92 of the end face 90 of the hub 26. The drainage mat 33 thus closes the filtrate outlet space 39.
  • a filter fabric 34 preferably made of stainless steel, is placed on the drainage mat 33, on which the filter cake is built up.
  • the hollow tube 88 forming the radial bolt 77 lies in the section 73 of the smallest diameter of the outer ring 86 and, as the filtrate outlet channel 31, guides the filtrate from the filtrate outlet chamber 39 into the annular channel 30 discharging the filtrate between the shaft 12 and the inner ring 76.
  • the radial bolt 77 or that Hollow tube 88 lies in a plane parallel to the filter plate 32 at right angles to the hub axis 38.
  • a distributor ring space 47 is formed, which adjoins the ring-shaped calming chamber 52 axially approximately at the level of the inner edge 37 of the filter plate 32.
  • the distributor ring space 47 opens into an outlet gap 45 which is formed between the filter plate 32 and the leg of the sleeve 60 lying parallel to it.
  • the collar 61 lying below the filter plate 32 and forming an end section of the sleeve 60 has embossments 62 rising up to the filter plate 32, which - as shown in FIG. 4 - extend over a partial circumference of the collar 61 and on the filter plate 32 issue.
  • Partitions 48 are formed by these embossments 62, which are distributed uniformly over the circumference, an outlet passage 49 for the filtrate being formed between adjacent embossments 60.
  • the partition walls 48 can lie both radially and in the circumferential direction at a distance a from the hub shell 27. Seen in plan view of a filter element 25 (FIG. 4), the partition walls 48 or the embossments 60 of the collar 61 lie in the circumferential direction between two adjacent inlet channels 46. It may be expedient to place the partition walls 48 at a radial distance from the mouth 44 of the To provide inlet channel 46 within the hub circumference.
  • the unfiltrate supplied via the feed line 36 flows into the settling chamber 52 via the feed channel 46, the wall section 51 of the sleeve 60 forming a wall 50 on which the inlet flow impinges.
  • the inlet channel 46 branches off from a housing pocket 43 which is formed in the inner wall 87 of the outer ring 86.
  • the housing pocket 43 is open to the annular space 70 and is preferably designed as a circumferential groove in the inner wall 87.
  • a constriction 41 is preferably formed, with which, on the one hand, an excessively high pressure drop in the feed line 36 and, on the other hand, an adapted volume flow are obtained. Since the unfiltrate flows in at the arrow 40 at high speed, the housing pocket 43 designed as a circumferential groove ensures the avoidance of an injector effect at the inlet opening of the constriction 41 facing the annular space 70.
  • Filter elements designed in this way are threaded onto the shaft 12 (FIGS. 1, 2) and stacked one above the other form the filter package 28, the seals 64 and 65 ensuring a tight connection of the partial sections 36 'to form an annular feed line 36 and the flat seal 63 on the Filter fabric 34 or the Filter mat 33 for liquid-tight covering of the filtrate outlet space 39 rests.
  • the non-filtrate flowing in in the direction of arrow 40 is thus distributed over the height of the filter package 28 to the inlet channels 46 of the individual hubs 26 and enters the calming chambers 52 in order from there via the distributor ring space 47 and the outlet passages 49 formed between the embossments 60 flow out the non-filtrate space 29 between adjacent filter elements 25.
  • the outlet flow 40 is located radially and approximately parallel to the filter element to be flown; the flow that is formed in the direction of the filter element is achieved by the pressure drop between the unfiltrate chamber 29 and the filtrate outlet chambers 39.
  • the cuff 60 is approximately L-shaped in section.
  • the foot section 66 forming the baffle 50 can lie at an angle 67 to the central axis 68 of the sleeve 60.
  • the angle 67 is approximately 4 ° in the exemplary embodiment.
  • the collar portion 61 of the cuff which is essentially perpendicular to the central axis 68
  • the pitch angle 69 is only a few degrees; in the exemplary embodiment, the pitch angle 69 is approximately 2 * .
  • 61 connecting transition section lies at an angle to the central axis 68.
  • the angle is 25 * in the exemplary embodiment.

Landscapes

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

Abstract

L'invention concerne un filtre destiné à la filtration par couches de suspensions telles que jus, vin, bière, etc. Un récipient (3) contient un ensemble filtre (28) constitué d'éléments filtrants (25) empilés, en forme de plaques. Chaque élément filtrant (25) comporte un moyeu (26) maintenu en place par un arbre (12) traversant l'ensemble filtre (28). Les moyeux (26) contiennent une conduite d'arrivée axiale (36) destinée à la partie non filtrée (18) et présentent plusieurs canaux d'arrivée (46) régulièrement répartis à la périphérie de chaque moyeu (26) et dirigés essentiellement radialement vers l'extérieur, qui sont alimentés par la conduite d'arrivée (36) et conduisent la partie non filtrée (18) dans l'espace (29) séparant les éléments filtrants voisins. Chaque élément filtrant (25) comporte en outre au moins un canal de sortie du filtrat (31) aboutissant dans le moyeu (26). Celui-ci est constitué d'un anneau interne (76) et d'un anneau externe (86) concentriques les uns par rapport aux autres avec un écartement radial (b), ce qui permet de fabriquer le moyeu (26) à un faible coût en matériel et en travail. L'espace annulaire (70) délimité par l'anneau interne (76) et l'anneau externe (86) constitue la conduite d'arrivée (36) de la partie non filtrée.
PCT/EP1997/000231 1996-01-24 1997-01-18 Filtre a disques WO1997026974A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19602348A DE19602348C1 (de) 1996-01-24 1996-01-24 Scheibenfilter
DE19602348.3 1996-01-24

Publications (1)

Publication Number Publication Date
WO1997026974A1 true WO1997026974A1 (fr) 1997-07-31

Family

ID=7783474

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/000231 WO1997026974A1 (fr) 1996-01-24 1997-01-18 Filtre a disques

Country Status (2)

Country Link
DE (1) DE19602348C1 (fr)
WO (1) WO1997026974A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007104270A1 (fr) * 2006-03-16 2007-09-20 Ip Ag Espaceur destine a une utilisation dans un systeme de filtration
CN102933275A (zh) * 2010-07-09 2013-02-13 贝卡尔特公司 圆盘形过滤元件
CN113185017A (zh) * 2021-05-20 2021-07-30 河南农业大学 一种便携式发酵尾液原位固定化装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529706A1 (de) * 1985-08-20 1987-03-05 Schenk Filterbau Gmbh Scheibenfilter zur filtration von fluessigkeiten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232354A1 (de) * 1982-08-31 1984-03-01 Anton Steinecker Maschinenfabrik Gmbh, 8050 Freising Grossflaechiges rotationsscheibenfilterelement fuer kesselfilter und verfahren zum betrieb eines solchen rotationsscheibenfilterelementes
DE3318437A1 (de) * 1983-05-20 1984-11-22 Uhde Gmbh, 4600 Dortmund Welle aus mehreren miteinander verbindbaren elementen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529706A1 (de) * 1985-08-20 1987-03-05 Schenk Filterbau Gmbh Scheibenfilter zur filtration von fluessigkeiten

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007104270A1 (fr) * 2006-03-16 2007-09-20 Ip Ag Espaceur destine a une utilisation dans un systeme de filtration
CN102933275A (zh) * 2010-07-09 2013-02-13 贝卡尔特公司 圆盘形过滤元件
US9776111B2 (en) 2010-07-09 2017-10-03 Purolator Advanced Filtration Disc shaped filter element
CN113185017A (zh) * 2021-05-20 2021-07-30 河南农业大学 一种便携式发酵尾液原位固定化装置
CN113185017B (zh) * 2021-05-20 2023-05-23 河南农业大学 一种便携式发酵尾液原位固定化装置

Also Published As

Publication number Publication date
DE19602348C1 (de) 1997-09-11

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