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WO1991012067A1 - Filtre a disques rotatif - Google Patents

Filtre a disques rotatif Download PDF

Info

Publication number
WO1991012067A1
WO1991012067A1 PCT/SE1991/000117 SE9100117W WO9112067A1 WO 1991012067 A1 WO1991012067 A1 WO 1991012067A1 SE 9100117 W SE9100117 W SE 9100117W WO 9112067 A1 WO9112067 A1 WO 9112067A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
drum
flat
liquid
filter disc
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.)
Ceased
Application number
PCT/SE1991/000117
Other languages
English (en)
Inventor
Folke Jakobson
Harry Nilsson
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.)
Celleco Hedemora AB
Original Assignee
Celleco Hedemora AB
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 Celleco Hedemora AB filed Critical Celleco Hedemora AB
Publication of WO1991012067A1 publication Critical patent/WO1991012067A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles

Definitions

  • the present invention concerns a rotating filter, including at least one filter disc arranged at the outer periphery of a fluid tight drum adapted to internally receive suspension to be filtered, to lead the suspension to the interior of the filter disc, to rotate about a collecting trough for solid material deposited on the filter disc and falling therefrom and to be partially submerged in a container for filtrate.
  • This filtering direction is primarily used when
  • the filter known from the patent specification mentioned has a cylindrical drum and several parallel filter discs having annular filter cloth portions as side surfaces. Each such filter disc, thus, comprises two relatively large annular filter cloth pieces.
  • the object of the present invention is to provide a filter of the kind initially stated, in which a filter disc comprising a plurality of filter sectors can be utilized and in which the sealing problem is substantially set aside.
  • a filter disc comprising a plurality of filter sectors can be utilized and in which the sealing problem is substantially set aside.
  • - Fig. 1 is an axial section through a disc filter according to the invention
  • - Fig. 2 is an end view of the disc filter according to Fig. 1 seen from the left in said Figure
  • - Fig. 3 is a portion of a cross section at an enlarged scale through the disc filter according to Fig. 1, the section being taken outside the left filter disc of Fig. 1,
  • - Fig. 4 shows a filter sector seen in the axial direction of the filter
  • Fig. 5 is a view of the filter sector according to Fig. 4 seen from its inlet end.
  • the disc filter according to the present invention is, as far as its basic structure is concerned, constructed substantially in correspondence with a conventional drum filter having filter discs.
  • a machine stand 1 having a forward end- wall 2 and a backward end wall 3 is arranged a filtrate vessel 4. Portions of the end walls 2 and 3 also constitute the for- ward and backward walls of the vessel.
  • a shaft 6 rotatably driveable in a non-shown manner is
  • the drum On the inner end of this shaft extending through the backward end wall 3 a hollow shaft or drum 7 is non-rotatably mounted, viz., by means of a wall 8 tightly closing the end of the drum facing the backward end wall 3.
  • the drum has a regularly polygonal shape, in the example shown being hexagonal (Figs. 2 and 3). Of course, other cross sectional shapes can exist, such as octagonal.
  • the periphery of the drum 7 comprises flat limiting surfaces 7'.
  • the end of the drum 7 facing the end wall 2 is open and is terminated by a circular ring 9 slide-sealingly contacted by a likewise annular lip seal 10 carried by an annular cylinder 11 arranged at the end wall 2. More precisely, the cylinder 11 is mounted at the inside of a door 12 tightly closing the forward end wall 2.
  • the drum 7 is built up of three plates 13 each circumferentially extending over two sides of the drum, i.e., having two flat surfaces 7', while, in the embodiment shown in Fig. 4, it is composed of six flat plates 13', each covering one side of the drum 7.
  • the drum is composed of two plates, each, thus, comprising one half of the drum, i.e., three flat surfaces 7'.
  • the plates are tightly interconnected along the edges of the drum, e.g., by means of flanges 14 extending in the longitudinal direction of the plates.
  • the drum is tight per se, apart form its open end which, however, is sealed by means of the seaing
  • the filter sector 16 in a conventional manner substantially has the shape of a circular sector having a truncated tip and comprises a non-shown framework on which a filter cloth 17 is arranged. Radially outwardly the filter sector is closed, while it radially inwardly has an opening 18 the shape of which corresponds to the shape of the openings 7'' in the plates 13 and 13' (the opening of plate 13' not being shown in Fig. 4).
  • the flat fastening flange is shown in Fig. 4 together with a corresponding plate 13' and separately in Fig. 5.
  • the filter sector 16 in a conventional manner substantially has the shape of a circular sector having a truncated tip and comprises a non-shown framework on which a filter cloth 17 is arranged. Radially outwardly the filter sector is closed, while it radially inwardly has an opening 18 the shape of which corresponds to the shape of the openings 7'' in the plates 13 and 13' (the opening of plate 13' not being shown in Fig. 4).
  • the opening of the filter sector - and, consequently, the corresponding opening 7'' of the plate 13' - extend perpendicularly to the direction of the axis of the drum over a substantial portion of the flat surface 7'.
  • the openings 7'' and 18 can be given great through flow areas.
  • the six-sided drum 7 carries totally tv/elve filter sectors arranged as two filter discs 19 and 20, each comprising six filter sectors 16, and each filter sector extending over a substantial portion of the width of one of the flat surfaces 7' of the drum.
  • a collecting trough 21 extending into the drum 7 somewhat beyond the inner filter disc 20 is rigidly and liquid tightly mounted onto the inside of the door 12.
  • the bottom 22 of the collecting trough is somewhat inclining from the inner end towards the door 12 where it merges with an outlet 23 for solid particles.
  • an inlet tube 24 for the. liquid to be filtered is rigidly and liquid tightly mounted at the door 12.
  • the inlet tube 24 extends into the drum at least to the inner filter disc 20.
  • the inlet tube 24 has openings or tube pieces 25 at its periphery located opposite to the filter discs 19 and 20, respectively, to direct the incoming fluid towards the respective filter disc.
  • these openings are directed obliquely upwards and outwards.
  • Fig. 3 are indicated bars 26 and 27 by means of which the inner end of the inlet tube 24 is supported by the collecting trough 21.
  • a filtrate outlet 28 extends from the vessel 4 through the end wall 2.
  • a spray device 35 serving to direct jets of water via an inlet 36, an axially directed conduit 37 and conduits 38 connected thereto and extending along the entire radial extension of the filter discs and having nozzles directed towards the filter sectors, towards the filter cloth 17 of the filter sectors for the purpose of cleaning it from particles clogging the openings of the filter cloth, but also for knocking off larger particles deposited on the inside of the filter cloth.
  • the function of the disc filter according to the present invention is the following.
  • the liquid or suspension 39 to be filtered is introduced through inlet tube 24 and its openings 25 into the interior of the liquid tight drum 7. Due to the location of the inlet tube 24 next to the collection trough and the outlet 23 (on the left hand side of the latter
  • the liquid 39 is directed by the openings 25 towards the opening 18 of a filter sector 16 which, during its rotation, lowers itself below the liquid level.
  • the normal operational level of the liquid 39 is indicated at L 1 (Fig. 3) and is always below the upper edge of the collecting trough 21.
  • the liquid will now flow into the filter sectors located below the liquid level L 1 through the openings 7'' in the drum 7 and the openings 18 in the filter sectors, and, under filtration through the filter cloth thereof, out to the vessel 4 and therefrom to the outlet 28.
  • the normal operational level L 2 of the filtrate 40 in the vessel 4 such that it is always below the level L 1 , the filtering process takes place solely depending on the static pressure difference between the levels L 1 and L 2 .

Landscapes

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

Abstract

L'invention se rapporte à un filtre rotatif comprenant au moins un disque de filtrage (19) disposé à la périphérie extérieure d'un tambour étanche aux fluides (7), qui est destiné à recevoir à l'intérieur le liquide (39) à filtrer et à conduire ce liquide à l'intérieur du disque de filtrage (19), qui est en rotation autour d'une cuve collectrice (21) servant à recueillir le matériau solide se déposant dans le disque de filtrage et tombant depuis celui-ci et qui est partiellement immergé dans un récipient (1) pour filtrat (40), le disque de filtrage (19, 20) étant composé de plusieurs secteurs de filtres (16). Le tambour étanche aux fluides (7) présente une section polygonale régulière comportant des surfaces de limitation externe planes (7') et chaque secteur de filtre (16) présente une surface de liaison plane (15) destinée à venir se plaquer en contact étanche contre l'une des surfaces de limitation planes (7') du tambour.
PCT/SE1991/000117 1990-02-16 1991-02-18 Filtre a disques rotatif Ceased WO1991012067A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000557-0 1990-02-16
SE9000557A SE465857B (sv) 1990-02-16 1990-02-16 Skivfilter

Publications (1)

Publication Number Publication Date
WO1991012067A1 true WO1991012067A1 (fr) 1991-08-22

Family

ID=20378582

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000117 Ceased WO1991012067A1 (fr) 1990-02-16 1991-02-18 Filtre a disques rotatif

Country Status (2)

Country Link
SE (2) SE465857B (fr)
WO (1) WO1991012067A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812611A1 (fr) * 1996-06-13 1997-12-17 Brückner Apparatebau GmbH Filtre à disque rotatif
US6231761B1 (en) * 1997-12-12 2001-05-15 Hydrotech Nils-Ake Persson Aktiebolag Rotary disk filter
US7597805B2 (en) 2003-02-27 2009-10-06 Hydrotech Veolia Water Systems Aktiebolag Rotary disc filter and module for constructing same
CN102266688A (zh) * 2010-06-07 2011-12-07 同方环境股份有限公司 一种微滤机结构
US8118175B2 (en) 2007-07-18 2012-02-21 Siemens Industry, Inc. Venting device for a disc filter
US8801931B2 (en) 2010-02-25 2014-08-12 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
US8801929B2 (en) 2007-07-18 2014-08-12 Evoqua Water Technologies Llc Trash tolerant filter support for a disc filter
US8894855B2 (en) 2008-03-28 2014-11-25 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
US9028692B2 (en) 2006-08-14 2015-05-12 Evoqua Water Technologies Llc High flow disc filter
US9359236B2 (en) 2010-08-18 2016-06-07 Evoqua Water Technologies Llc Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle
US10131550B2 (en) 2013-05-06 2018-11-20 Evoqua Water Technologies Llc Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle
US10857491B2 (en) 2014-06-05 2020-12-08 Evoqua Water Technologies Llc Filtering panel and method of making the same
US10888807B2 (en) 2016-08-12 2021-01-12 Evoqua Water Technologies Llc Disc filter pre-screen dual media disc filter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE86207C1 (fr) *
GB1009952A (en) * 1962-05-17 1965-11-17 Simonacco Ltd Improvements in and relating to rotary disc filters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE86207C1 (fr) *
GB1009952A (en) * 1962-05-17 1965-11-17 Simonacco Ltd Improvements in and relating to rotary disc filters

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812611A1 (fr) * 1996-06-13 1997-12-17 Brückner Apparatebau GmbH Filtre à disque rotatif
US6231761B1 (en) * 1997-12-12 2001-05-15 Hydrotech Nils-Ake Persson Aktiebolag Rotary disk filter
US8961785B2 (en) 2003-02-27 2015-02-24 Veolia Water Solutions & Technologies Support Rotary disc filter and module for constructing same
US7597805B2 (en) 2003-02-27 2009-10-06 Hydrotech Veolia Water Systems Aktiebolag Rotary disc filter and module for constructing same
US10188971B2 (en) 2003-02-27 2019-01-29 Veolia Water Solutions & Technologies Support Rotary disc filter and module for constructing same
US8409436B2 (en) 2003-02-27 2013-04-02 Veolia Water Solutions & Technologies Support Rotary disc filter and module for constructing same
US7972508B2 (en) 2003-02-27 2011-07-05 Veolia Water Solutions & Technologies Support Rotary disc filter and module for constructing same
US10207210B2 (en) 2006-08-14 2019-02-19 Evoqua Water Technologies Llc High flow disc filter
US9028692B2 (en) 2006-08-14 2015-05-12 Evoqua Water Technologies Llc High flow disc filter
US8808542B2 (en) 2007-07-18 2014-08-19 Evoqua Water Technologies Llc Disc filter
US8801929B2 (en) 2007-07-18 2014-08-12 Evoqua Water Technologies Llc Trash tolerant filter support for a disc filter
US9339745B2 (en) 2007-07-18 2016-05-17 Evoqua Water Technologies Llc Trash tolerant filter support for a disc filter
US8118175B2 (en) 2007-07-18 2012-02-21 Siemens Industry, Inc. Venting device for a disc filter
US9023208B2 (en) 2007-07-18 2015-05-05 Evoqua Water Technologies Llc Disc filter
US9359239B2 (en) 2008-03-28 2016-06-07 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
US9359238B2 (en) 2008-03-28 2016-06-07 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
US8894855B2 (en) 2008-03-28 2014-11-25 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
US8894856B2 (en) 2008-03-28 2014-11-25 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
US8801931B2 (en) 2010-02-25 2014-08-12 Evoqua Water Technologies Llc Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
CN102266688A (zh) * 2010-06-07 2011-12-07 同方环境股份有限公司 一种微滤机结构
US9783440B2 (en) 2010-08-18 2017-10-10 Evoqua Water Technologies Llc Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle
US9359236B2 (en) 2010-08-18 2016-06-07 Evoqua Water Technologies Llc Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle
US10131550B2 (en) 2013-05-06 2018-11-20 Evoqua Water Technologies Llc Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle
US10857491B2 (en) 2014-06-05 2020-12-08 Evoqua Water Technologies Llc Filtering panel and method of making the same
US11660552B2 (en) 2014-06-05 2023-05-30 Evoqua Water Technologies Llc Filtering panel and method of making the same
US10888807B2 (en) 2016-08-12 2021-01-12 Evoqua Water Technologies Llc Disc filter pre-screen dual media disc filter
US12048890B2 (en) 2016-08-12 2024-07-30 Evoqua Water Technologies Llc Disc filter pre-screen dual media disc filter

Also Published As

Publication number Publication date
SE466189B (sv) 1992-01-13
SE9000557L (sv) 1991-08-17
SE9000557D0 (sv) 1990-02-16
SE9101845D0 (sv) 1991-06-14
SE465857B (sv) 1991-11-11
SE9101845L (sv) 1991-08-17

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