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DE2546263A1 - Prim. flotation appts. for belt filter with paper belt - has vacuum pump for spreading suspension over belt surface - Google Patents

Prim. flotation appts. for belt filter with paper belt - has vacuum pump for spreading suspension over belt surface

Info

Publication number
DE2546263A1
DE2546263A1 DE19752546263 DE2546263A DE2546263A1 DE 2546263 A1 DE2546263 A1 DE 2546263A1 DE 19752546263 DE19752546263 DE 19752546263 DE 2546263 A DE2546263 A DE 2546263A DE 2546263 A1 DE2546263 A1 DE 2546263A1
Authority
DE
Germany
Prior art keywords
filter
belt
vacuum pump
paper
appts
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Withdrawn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
DE19752546263
Other languages
German (de)
Inventor
Peter Anthony Miller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19752546263 priority Critical patent/DE2546263A1/en
Publication of DE2546263A1 publication Critical patent/DE2546263A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D37/00Processes of filtration
    • B01D37/02Precoating the filter medium; Addition of filter aids to the liquid being filtered
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/09Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with filtering bands, e.g. movable between filtering operations

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Abstract

The appts. is provided in conjunction with a belt filter with a filter chamber, using a paper belt which is advanced stepwise as the filter medium. No additional conveying means is required apart from the vacuum pump mounted on the filtrate side, for spreading the required liquid suspension of filtering medium over the sealed surface of the belt. Pref. the required amount of liquid suspension is metered by valves, by a metering vessel by the vol. present in the filter chamber. Intermediate filtration clarification can be obtd. by correlating the filtration properties of the paper belt used and of the filtering medium without advance movement. The system is simple reliable and cheap.

Description

VORANSCHEÆ} ORRICHTUNG EINES EANDFILTERS PREVIEWÆ} ORIENTATION OF AN EAND FILTER

Die Erfindung betrifft eine Voranschwemm-Vorrichtung in Zusartrnehang mit einem selbstansaugenden, absatzweise arbeitenden Vakuumfilter.The invention relates to a precoating device in Zusartrnehang with a self-priming, intermittent vacuum filter.

Das Voranschwemmverfahren in der Filtertechnik kann als eine Vorbelagsbildung auf einem oder mehreren Filterelementen beschrieben werden.The precoating process in filter technology can be seen as a precoat formation be described on one or more filter elements.

Dieser Vorbelag dient als eigentliches primäres Filtermedium. Das Filterelement selbst dient normalerweise nur als Träger für die Filterhilfsmittelschicht. Die Elemente sind normalerweisesmit einer relativ groben, siebähnlichen Oberfläche ausgestattet. Dies gewährleistet eine gründliche Säuberung des Filters nach der Filtration. Zur Vorbelagsbildung verwendet man normalerweise ein Anschwemmgefäss mit sauberer Flüssigkeit, in dem das Filterhilfsmittel suspendiert ist. Diese Aufschlämmung pumpt man im Kreislauf durch das Filter und zuruck in das Anschwemmgefäss, bis das suspendierte Filterhilfsmittel restlos und gleichmässig auf die Elemente aufgetragen ist.This pre-coating serves as the actual primary filter medium. That The filter element itself normally only serves as a carrier for the filter aid layer. The elements are usually with a relatively coarse, screen-like surface fitted. This ensures a thorough cleaning of the filter after the Filtration. A precoat is normally used to form a deposit with clean liquid in which the filter aid is suspended. This slurry you pump in a circuit through the filter and back into the precoat until the suspended filter aids completely and evenly applied to the elements is.

Dieser Art von Anschwemmverfahren ist verhältnissmässig zeitraubend, aufwendig und unzuverlässig.This type of precoating process is relatively time consuming, expensive and unreliable.

Zweck der vorleigenden Erfindung ist es, ein einfaches, zuverlässiges und wenig aufwendiges System zu schaffen. Das System (Fig. 1) besteht im wesentlichen aus einem Papierbandfilter (1), Arischwengefäss (2), Anschwemmdosierungsgefäss (3), Dosierungsventile (4 und 5), Trübegefäss (7), Ent- und Belüftnngsleitung (6) und Trübeeinfuhrventil (8).The purpose of the present invention is to provide a simple, reliable and to create an inexpensive system. The system (Fig. 1) consists essentially from a paper band filter (1), Arischwen container (2), precoat dosing container (3), Dosing valves (4 and 5), sludge vessel (7), venting and ventilation line (6) and Slurry inlet valve (8).

Das System funktioniert folgendermassen: Die Papierrolle (9) führt einen sauberen Bandabschnitt auf die Filterplatte (11). Mittels des Druckzylinders (12) wird der Filterdeckel (10) auf das saubere Filterband gedrückt und das Filter abgedichtet. Die Vakuupumpe (13) schaltet sich ein und gleichzeitig öffnet sich das Ventil (4). Nach festgesetzter Zeit, während der das Anscnwsccdosiergefäss (3) mit suspendiertem Filterhilfsmittel gefüllt wird, öffnet sich das Ventil (5) und schliesst sich das Ventil (4).The system works as follows: The paper roll (9) guides a clean section of tape on the filter plate (11). By means of the pressure cylinder (12) the filter cover (10) is pressed onto the clean filter belt and the filter sealed. The vacuum pump (13) switches on and opens at the same time the valve (4). After a set time, during which the contact dosing vessel (3) with suspended filter aid is filled, that opens Valve (5) and the valve (4) closes.

Der Inhalt vom Gefäss (3) wird dadurch in die Rohrleitung (14) gesaugt.The contents of the vessel (3) are sucked into the pipeline (14).

Nach einer entsprechenden Zeit schliesst sich Ventil (5) und gleichzeitig öffnet sich Ventil (8). Wenn die Ventilbetätigung zeitlich richtig abgestimmt ist, wird eine dünne Schicht von Filterhilfsmittelsuspension über die ganze abgedichtete Papierbandoberfläche (15) verteilt. Diese Schicht dient als eigentliches primäres Filtermedium für die nachfliessende Trübe. Wbnn die Papier- und Filterhilfsmittel-Qualität richtig aufeinander abgestimmt sind, wird eine sofortige Klärwirkung erzielt.After a corresponding time, valve (5) closes and at the same time valve (8) opens. If the valve actuation is correctly timed, a thin layer of filter aid suspension is sealed over the whole Paper tape surface (15) distributed. This layer serves as the actual primary Filter medium for the subsequent turbidity. Wbnn the paper and filter aid quality are properly coordinated, an immediate clarifying effect is achieved.

Das Filtrat wird durch das Filterband gesaugt und unter Druck zu dem gewünschten Auffangsort befördert.The filtrate is sucked through the filter belt and under pressure to the the desired collection point.

Nach der Filtration wird das Belüftungsventil (16) automatisch geöffnet.After the filtration, the ventilation valve (16) opens automatically.

Dadurch wird der Unterdruck in der Filterkammer unterbrochen und ai#tosphärische Luft durch Filterkuchen und Filterband hindurchgesaugt. Der Filterdeckel (17) wird dann angehoben.This interrupts the negative pressure in the filter chamber and becomes ai # tospherical Air sucked through the filter cake and filter belt. The filter cover (17) will then raised.

Der Austragungsmotor (1<3) wird eingeschaltet und die Abzugsrollen (20) führen das Filterband langsam aus der Filterkammer heraus. Der Filterkuchen wird durch den Abschaber (19) von dem Filterband abgehoben.The discharge motor (1 <3) is switched on and the take-off rollers (20) slowly guide the filter belt out of the filter chamber. The filter cake is lifted off the filter belt by the scraper (19).

Der Arbeitszyklus wird dann automatisch wiederholt.The work cycle is then repeated automatically.

L e e r s e i t eL e r s e i t e

Claims (3)

PATENTANSPROCHE ine Voranschwemmrorrichtung in ZusammEnhang mit einem Bandfilter mit Filterkammer, das vorzugsweise als Filtermedium ein absatzweise befördertes Papierband verwendet, d a d u r c h g e k e n n z e i c h n e t dass um die benötigte flüssige Suspension von Filterhilfsmittel auf der abgedichteten Bandfläche zu verteilen, kein zusätzliches Fördergerät ausser der auf der Filtratseite angeschlossenen Vakuumpumpe benötigt wird. PATENT APPROACH to a precoating device in connection with a Belt filter with filter chamber, which is preferably conveyed in batches as a filter medium Paper tape is used that is not indicated in the order that the required to distribute liquid suspension of filter aid on the sealed belt surface, no additional conveying device apart from the vacuum pump connected on the filtrate side is needed. 2. Eine Voranschwemmvorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass die benötigte Menge von flüssiger Suspension auf einfache Weise durch Ventile (5 und 6), durch ein Dosiergefäss und durch das vorhandene Vakuum, in der Filterkammer dosiert wird. 2. A precoating device according to claim 1, d a d u r c h g It is not noted that the required amount of liquid suspension is up simply through valves (5 and 6), through a dosing vessel and through the existing one Vacuum, is dosed in the filter chamber. 3. Eine Voranschwemmvorrichtung nach den Ansprüchen 1 und 2, d a d u r c h g e k e n n z e i c h n e t , dass durch Abstimmung der Filtrations-Eigenschaften des verwandten Papierbandes und des Filterhilfsmittels und ohne Vorlauf, eine sofortige Filtratklärung erzielt wird. 3. A precoating device according to claims 1 and 2, d a d u r e k e k e n n e nt e i n e t that by coordinating the filtration properties of the paper tape and the filter aid used and without a lead, an immediate one Filtrate clarification is achieved.
DE19752546263 1975-10-16 1975-10-16 Prim. flotation appts. for belt filter with paper belt - has vacuum pump for spreading suspension over belt surface Withdrawn DE2546263A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752546263 DE2546263A1 (en) 1975-10-16 1975-10-16 Prim. flotation appts. for belt filter with paper belt - has vacuum pump for spreading suspension over belt surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752546263 DE2546263A1 (en) 1975-10-16 1975-10-16 Prim. flotation appts. for belt filter with paper belt - has vacuum pump for spreading suspension over belt surface

Publications (1)

Publication Number Publication Date
DE2546263A1 true DE2546263A1 (en) 1977-04-28

Family

ID=5959238

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752546263 Withdrawn DE2546263A1 (en) 1975-10-16 1975-10-16 Prim. flotation appts. for belt filter with paper belt - has vacuum pump for spreading suspension over belt surface

Country Status (1)

Country Link
DE (1) DE2546263A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329945A1 (en) * 1983-08-19 1985-02-28 Axel 7500 Karlsruhe Rathjen Fluid guiding device for processing machines having a circulating processing chamber
WO1993000146A1 (en) * 1991-06-25 1993-01-07 Thomas Handtmann Process and device for filtering liquids

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329945A1 (en) * 1983-08-19 1985-02-28 Axel 7500 Karlsruhe Rathjen Fluid guiding device for processing machines having a circulating processing chamber
WO1993000146A1 (en) * 1991-06-25 1993-01-07 Thomas Handtmann Process and device for filtering liquids
US5445745A (en) * 1991-06-25 1995-08-29 Handtmann; Thomas Filtering method for filtering liquids

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