EP1737552A2 - Dispositif et procede pour entretenir, filtrer et purifier un fluide de travail - Google Patents

Dispositif et procede pour entretenir, filtrer et purifier un fluide de travail

Info

Publication number
EP1737552A2
EP1737552A2 EP05716212A EP05716212A EP1737552A2 EP 1737552 A2 EP1737552 A2 EP 1737552A2 EP 05716212 A EP05716212 A EP 05716212A EP 05716212 A EP05716212 A EP 05716212A EP 1737552 A2 EP1737552 A2 EP 1737552A2
Authority
EP
European Patent Office
Prior art keywords
filter
discharge device
filter cake
plunger
funnel
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.)
Withdrawn
Application number
EP05716212A
Other languages
German (de)
English (en)
Inventor
Zbigniew Combrowski
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.)
GKD Gebr Kufferath AG
Original Assignee
Z-FILTER GmbH and Co KG
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 Z-FILTER GmbH and Co KG filed Critical Z-FILTER GmbH and Co KG
Publication of EP1737552A2 publication Critical patent/EP1737552A2/fr
Withdrawn legal-status Critical Current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
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • 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
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes

Definitions

  • the invention relates to a method for maintaining, filtering and cleaning a working medium with at least one filter in a filter housing, to which a discharge device for a filter cake is connected, as well as a device for this and a discharge device.
  • Working medium to be cleaned should be understood to mean all conceivable media from the industrial and / or private sector which are to be freed of particulate contaminants. These include in particular cooling lubricants, oil, grinding water, car wash water and wash baths, water from the pharmaceutical industry or chemistry or from food production. But these are just examples.
  • BESTATIGUNGSKOPIE A device of the above type is known from DE 101 40 709 A1.
  • the working medium is fed to at least one filter via at least one line, the filter forming at least one filter surface through which the working medium flows.
  • the filtrate then arrives at a filtrate outlet, while the filtered particles are brought to a sedimentation chamber.
  • the filtered particles sink down, bake together and are then removed through a valve, a slide or a pneumatic, mechanical or hydraulic flap. It is also conceivable that they are pushed out by a discharge piston.
  • the present invention has for its object to provide a method and an apparatus of the above. Provide a way in which the discharge of the filter cake is significantly improved.
  • the particles filtered out are pressed in stages in the discharge device to the filter cake and the pressed filter cake is discharged after reaching a predetermined thickness.
  • the work of the plunger is preferably controlled on the basis of its stroke and its pressure. Initially, a relatively low pressure is chosen so that the filtered particles are simply pushed together. If the filter cake has reached a certain thickness, the pressure can be increased continuously become. In many cases, however, increasing the pressure towards the end of the work cycle is sufficient. This ensures that the filter cake contains as little liquid as possible.
  • the stroke of the plunger is monitored, which determines the thickness of the filter cake. This is done using displacement sensors of any design. As soon as the filter cake has reached a prescribed thickness, the pressure of the plunger is increased and / or the filter cake is ejected.
  • Pressing the filtrate back out of the filter cake into a feed funnel has the advantage that there is constant movement in the feed funnel, so that there is no caking of particles to be discharged, which may clog the feed funnel.
  • Another method according to the invention also refers to the last-mentioned feature, for which protection is sought independently, but which should be used in particular in connection with the method just described.
  • the medium is to be moved, in particular swirled, shortly before and / or at the transition between the filter housing and the discharge device. This ensures that there is no bridging of particles in this area, which would clog the funnel.
  • the filter housing can be pressurized to discharge the filter cake and / or the filter cake can be suctioned out of the discharge device.
  • the filter cake can be suctioned out of the discharge device.
  • the filter cake There is no need to press the filter cake here. It is only important that the discharge takes place quickly, ie the filter housing is emptied quickly. This is guaranteed by the excess pressure generated or by suction. It is preferably considered that the filter is backwashed at time intervals. There are several possibilities here.
  • a medium should be applied to the inside of the filter so that the sludge lying on the outside of the filter is lifted off the filter surface.
  • Protection is specifically claimed for a preferred backwashing process which includes another method of particle removal.
  • the feed pump of the filter for the working medium is switched off before the backwashing process in order to depressurize the inner housing of the filter.
  • the housing must be emptied quickly so that an effective backwashing can be carried out and the particles can be better removed.
  • a rewind pulse is preferably initiated and / or a valve on the system housing is opened in order to thus accelerate the outflow of the medium in the filter via the filter pump or a separate valve.
  • a pre-chamber should be separated from a press chamber in the discharge device.
  • a corresponding press piston first passes through the pre-chamber and pushes the sedimented particles into the press chamber. There the particles are pressed together and pressed into the filter cake.
  • the press chamber is closed by a slide.
  • This slide can be opened as required, for example if the filter cake is one has reached a predetermined thickness.
  • Actuators for the slide and slide themselves are commercially available, so that a more detailed description can be omitted.
  • the plunger is preferably part of a piston / cylinder unit that can be operated pneumatically or hydraulically. It is designed so that it can pass through the antechamber and press chamber. In cross-section, it is advisable that it is cylindrical, but other cross-sections are also conceivable and should be encompassed by the invention.
  • the piston or at least its outer surface is made of plastic, which has the advantage that, for example, chips can eat into the plastic shell without welding to the chamber.
  • the plunger and its seal are designed in such a way that pressed filtrate can get back into the feed funnel.
  • corresponding passages can be formed in a funnel wall, but for the sake of simplicity, a funnel wall or an impact wall inserted into the funnel should be at a distance from a side wall, so that working medium can penetrate into the funnel through the resulting slot and produce vortices there.
  • the filters, the filter chamber, the feed funnel and the discharge device with nozzles in the interior or exterior of the filter housing and thus optimize the removal of the filter cake to the discharge device and the simultaneous rinsing of the areas mentioned.
  • the discharge device described above forms an independent component, or the like to other filter devices. can be applied. For this reason, protection is also sought separately for this element.
  • Operate discharge device (contains press piston and press chamber), which is only provided with a valve, a slide or a pneumatic, mechanical or hydraulic flap.
  • the slide can also serve to safely separate the compressed sludge, ie the briquette, from the piston so that it is not drawn back into the pressing chamber when the piston is pulled back. In this case, the slider pushes the briquette away from the piston so that it falls off.
  • Figure 1 shows a cross section through an inventive device for
  • Figure 2 is a plan view of a discharge device according to the invention.
  • Figure 3 is a reduced and perspective view of the
  • Figure 4 shows a cross section through the discharge device according to Figure 2 along line IV-IV.
  • a device P according to the invention for maintaining and cleaning a working medium has a preferably closed filter housing 1.
  • a filter housing 1 is described, for example, in DE 101 40 709, to which particular reference is made. Accordingly, only the parts essential to the present invention are described in more detail below.
  • the filter housing 1 consists of two side walls, only the rear wall 2 of which is shown, and a housing jacket 3 which is inserted between the two side walls.
  • the housing jacket 3 forms a funnel 5 downward towards a discharge device 4, through which particles filtered out can reach a discharge chamber 6 of the discharge device 4.
  • filter surfaces 7 which serve to filter out particles from the working medium to be cleaned.
  • the working medium to be cleaned is introduced here Embodiment from below behind a baffle 8 in the funnel 5.
  • a corresponding inlet 9 is only hinted at.
  • the discharge device 4 connects directly to the funnel 5 with an opening 10 (see FIGS. 2 to 4).
  • the opening 10 is cut into a tube 11.
  • the discharge chamber 6 and a cylinder space 12 for receiving a press piston 13 are located in the tube 11.
  • the press piston 13 is preferably made of plastic and is connected to a piston rod 15 via a threaded bolt 14. This piston rod 15 moves under the pressure of a pressure piston 16 in a pressure chamber 17 of a corresponding piston / cylinder unit 23.
  • the plunger 13 is sealed at the front by an annular seal 18.1 and at the end by two ring seals 18.2 and 18.3.
  • the ring seal 18.1 is designed such that it allows liquid to pass through. However, the ring seal 18.1 is not required for every application.
  • the discharge chamber 6 is subdivided into a prechamber 19 which connects directly to the funnel 5 and a pressing chamber 20 which adjoins the prechamber 19 approximately horizontally.
  • the pressing chamber 20 is closed by a slide 21 which can be moved by a corresponding drive 22.
  • Working medium to be cleaned flows into the filter housing 1 via the inlet 9, wherein it is guided through the baffle 8 to the filter surface 7.
  • a smaller part of the working medium should also be able to flow into the funnel 5, which is made possible by the fact that the baffle 8, for example from the rear wall 2, not shown in more detail, maintains a distance, so that a slot is formed between the baffle 8 and the rear wall 2 .
  • This working medium flowing into the funnel 5 has the advantage that it creates turbulence there, so that the particles sinking into the funnel 5 or sedimenting there cannot combine and thus no bridges are formed which lead to a blockage of the funnel 5 ,
  • the plunger 13 is moved by means of the piston / cylinder unit 23, passing through the prechamber 19 and the particles are transported from the pre-chamber 19 into the pressing chamber 20.
  • the filtrate pressed out flows along the gap between the press piston 13 and the inner wall of the press chamber 20 via the ring seal 18.1 to the rear into the antechamber 19 and is pressed up there into the funnel 5. This also results in a flow in the transition from funnel 5 to prechamber 19, which counteracts the bridging of the sedimenting particles.
  • the press piston 13 passes from the pre-chamber 19 to the press chamber 20, it can occur in the edge region that, for example, chips are carried along by the jacket of the press piston. Since the jacket of the plunger is made of plastic, the chips press into the plastic so that the plunger does not become stuck in the press chamber 20. At the same time, the chips in the plastic jacket of the plunger also produce grooves via which a return the filtrate from the press chamber 20 is facilitated. There is no cold welding as with conventional metal pistons.
  • the work of the plunger 13 creates a filter cake briquette in the press chamber 20 which is very compressed. This reduces the extension of the plunger over time. This exit path and the one through the The pressure applied to the plunger is monitored by a control system, not shown in detail. If, for example, the plunger no longer reaches a certain displacement sensor, this means that a filter cake of the appropriate thickness has been reached. The next time the plunger is lifted, the filter cake should be compressed again very strongly, for which purpose, for example, the working pressure of the plunger is increased to 50 bar. After this working stroke, the slide 21 is opened by means of the drive 22 and the filter cake can be ejected from the pressing chamber 20 by the pressing piston 13.
  • the discharge device 4 and inlet 9 for the working medium to be cleaned are at the lowest point of the filter housing 1. If this is emptied after the end of the filtering cycle, a negative pressure is created in the filter housing 2, as a result of which the filter surface 7 is washed off. The corresponding sludge parts fall down into the funnel 5 and from there into the discharge chamber 6. This improves the cleaning of the filter surface 7.
  • the inlet 9 is preferably oriented such that a jet of the working medium to be cleaned hits the filter surface 7 directly. As a result, this jet also injects the filter surfaces 7 cleanly and the sludge flows through the funnel 5 into the discharge chamber 6.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

L'invention concerne un procédé pour entretenir, filtrer et purifier un fluide de travail à l'aide d'au moins un filtre (2) situé dans un boîtier (1) de filtre, auquel est raccordé un dispositif d'extraction (4) pour un gâteau de filtration. Selon ledit procédé, les particules retenues par le filtre sont comprimées dans le dispositif d'extraction (4) en plusieurs étapes jusqu'à l'obtention du gâteau de filtration et le gâteau de filtration comprimé est extrait après avoir atteint une épaisseur prédéterminée.
EP05716212A 2004-03-22 2005-03-18 Dispositif et procede pour entretenir, filtrer et purifier un fluide de travail Withdrawn EP1737552A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004014332 2004-03-22
DE102004052098A DE102004052098A1 (de) 2004-03-22 2004-10-26 Verfahren und Vorrichtung zum Pflegen, Filtrieren und Reinigen eines Arbeitsmediums
PCT/EP2005/002926 WO2005094964A2 (fr) 2004-03-22 2005-03-18 Dispositif et procede pour entretenir, filtrer et purifier un fluide de travail

Publications (1)

Publication Number Publication Date
EP1737552A2 true EP1737552A2 (fr) 2007-01-03

Family

ID=34963805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05716212A Withdrawn EP1737552A2 (fr) 2004-03-22 2005-03-18 Dispositif et procede pour entretenir, filtrer et purifier un fluide de travail

Country Status (5)

Country Link
US (1) US20070278162A1 (fr)
EP (1) EP1737552A2 (fr)
JP (1) JP2007529315A (fr)
DE (2) DE102004052098A1 (fr)
WO (1) WO2005094964A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007008129U1 (de) * 2007-06-06 2008-10-16 Gkd - Gebr. Kufferath Ag Vorrichtung zum Pflegen, Filtrieren und/oder Reinigen eines Mediums
JP2011515206A (ja) * 2008-03-06 2011-05-19 アミアド フィルトレイション システムズ リミテッド 高粘性流体濾過システム
US20140054244A1 (en) * 2011-03-03 2014-02-27 Lns Management Sa Filtering chip conveyor
SE536441C2 (sv) 2012-06-13 2013-11-05 Metso Paper Sweden Ab Metod och utrustning för mätning av filtersektorer i skivfilter
CN120437692B (zh) * 2025-07-14 2025-12-12 四川国泰民安科技有限公司 框式过滤机高频脉冲控温气液混合流清洗系统及清洗方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796316A (en) * 1972-07-07 1974-03-12 A Matz Water filtering apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3321565A1 (de) * 1983-06-15 1984-12-20 Klöckner-Humboldt-Deutz AG, 5000 Köln Druckfilter, insbesondere trommelfilter zur kontinuierlichen ueberdruckfiltration von feststoffen aus einer truebe
US4801572A (en) * 1987-05-28 1989-01-31 Mobil Oil Corporation Modified chromium-containing catalyst composition for polymerizing alpha-olefins and method of preparing same
JPH0634807Y2 (ja) * 1989-03-31 1994-09-14 説哉 九里 絞り機構を有する密閉型多様濾過装置
JPH0738925B2 (ja) * 1991-08-29 1995-05-01 株式会社旭機械製作所 濾過装置ユニット、この濾過装置ユニットを用いた連続濾過装置、濾過装置ユニットの濾過エレメントの洗浄方法、および、連続濾過装置の連続運転方法
DE4339268C2 (de) * 1993-11-18 1996-01-25 Huber Hans Gmbh Maschinen Und Verfahren und Vorrichtung zum Ausfiltern und Rückspülen von Feststoff-Partikeln aus Flüssigkeiten
DE4425451A1 (de) * 1994-07-19 1996-01-25 Kloeckner Humboldt Deutz Ag Verfahren und Vorrichtung zum Austragen von feucht/rieselfähigem bis pastösem Material aus einem Druckfilter
DE10140709B4 (de) 2001-08-24 2006-02-02 Z-Filter Gmbh + Co. Kg Verfahren zum Pflegen und Reinigen eines Arbeitsmediums
JP2004000895A (ja) * 2002-01-17 2004-01-08 Taisei Kogyo Kk フィルタ装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796316A (en) * 1972-07-07 1974-03-12 A Matz Water filtering apparatus

Also Published As

Publication number Publication date
DE102004052098A1 (de) 2005-10-13
WO2005094964A2 (fr) 2005-10-13
JP2007529315A (ja) 2007-10-25
US20070278162A1 (en) 2007-12-06
WO2005094964A3 (fr) 2005-12-15
DE202004021373U1 (de) 2007-12-06

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