DE1254594B - Stirring device for rotary filter troughs - Google Patents

Stirring device for rotary filter troughs

Info

Publication number
DE1254594B
DE1254594B DEJ29715A DEJ0029715A DE1254594B DE 1254594 B DE1254594 B DE 1254594B DE J29715 A DEJ29715 A DE J29715A DE J0029715 A DEJ0029715 A DE J0029715A DE 1254594 B DE1254594 B DE 1254594B
Authority
DE
Germany
Prior art keywords
filter
trough
stirrer
drum
rotary filter
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.)
Pending
Application number
DEJ29715A
Other languages
German (de)
Inventor
Dr Friedrich Liepe
Dipl-Ing Juergen Thielemann
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.)
INST CHEMIEANLAGEN
Original Assignee
INST CHEMIEANLAGEN
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 INST CHEMIEANLAGEN filed Critical INST CHEMIEANLAGEN
Priority to DEJ29715A priority Critical patent/DE1254594B/en
Publication of DE1254594B publication Critical patent/DE1254594B/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
    • 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
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/68—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • 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
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • B01D33/722—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis

Description

Rühreinrichtung für Drehfiltertröge Die Erfindung betrifft eine Rühreinrichtung für Drehfiltertröge, die an der tiefsten Stelle des Filtertroges angeordnet und annähernd über die gesamte Trogbreite reicht und in gleiche Drehrichtung wie die Filtertrommel bewegbar ist.Stirring device for rotary filter troughs The invention relates to a stirring device for rotary filter troughs, which are arranged at the lowest point of the filter trough and Reaches almost the entire width of the trough and in the same direction of rotation as the Filter drum is movable.

Es sind Drehfilter bekannt, die aus einer Filtertrommel und einem darunter befindlichen Filtertrog bestehen, bei denen an der tiefsten Stelle des Filtertroges ein Rührer angeordnet ist. Dieser Rührer ist kreuzförmig ausgebildet und besitzt die gleiche Drehrichtung wie die Filtertrommel. Durch diesen Rührer wird die im Filtertrog befindliche Suspension aufgewirbelt und die Feststoffteilchen an die Filtertrommel herangetragen. There are rotary filter known, which consists of a filter drum and a filter trough located underneath, in which at the deepest point of the Filter trough a stirrer is arranged. This stirrer is cross-shaped and has the same direction of rotation as the filter drum. Through this stirrer the suspension in the filter trough is whirled up and the solid particles carried to the filter drum.

Der durch den Rührer hervorgerufene Wirbel besitzt jedoch nur einen begrenzten Wirkungskreis, so daß sich an den Stellen des Filtertroges, die der Wirkung des Rührers nicht unterliegen, Feststoffteilchen absetzen. Dies ist besonders in dem Bereich zwischen dem schrägwandigen Teil des Filtertroges und der Filtertrommel der Fall, weil in diesem Teil die Strömungsgeschwindigkeit progressiv zu der Entfernung vom Rührer immer mehr abnimmt, so daß die Feststoffe absinken. However, the vortex caused by the stirrer has only one limited sphere of action, so that at the points of the filter trough that of the effect not subject to the stirrer, solid particles settle. This is especially in the area between the sloping part of the filter trough and the filter drum the case, because in this part the flow velocity progressively with the distance from the stirrer decreases more and more, so that the solids sink.

Trotz der Verwendung eines Rührers kann deshalb eine gleichmäßige Beschichtung der Filtertrommel mit Filterhilfsmittel nicht erreicht werden. Despite the use of a stirrer, a uniform Coating of the filter drum with filter aid cannot be achieved.

Ferner ist ein Drehfilter bekannt, der, um im Bereich der aufsteigenden Trommelhälfte eine konstante Trübebewegung nahe der Trogwand zu erhalten, ein zweiarmiges Pendelrührwerk in diesem Bereich des Filtertroges besitzt. Zwischen beiden Rührwerksarmen, wovon der eine in der Nähe der Trommelwand und der andere nahe der Trogwand arbeitet, ist eine Trennwand angeordnet, die einen Flüssigkeitsaustausch zwischen beiden Trogbereichen etwa an der tiefsten Stelle des Filtertroges ermöglicht. Furthermore, a rotary filter is known which, in order to in the area of the ascending Drum half to maintain constant turbidity movement close to the trough wall, a two-armed one Has pendulum agitator in this area of the filter trough. Between the two agitator arms, one of which works near the drum wall and the other near the trough wall, a partition is arranged, which enables the exchange of liquid between the two trough areas at about the lowest point of the filter trough.

Der zwischen Trogwand und Trennwand arbeitende Rührwerksarm fördert die Trübe zur tiefsten Stelle des Filtertroges, wo sie durch eine Öffnung zwischen Trogboden und Trennwand in den anderen Trogbereich gelangt. Durch die Wirkung des anderen Rührwerksarmes wird die Strömung umgelenkt und die Trübe zwischen Trommelwand und Trennwand in Drehrichtung der Trommel bewegt.The agitator arm working between the trough wall and partition wall conveys the turbidity to the deepest point of the filter trough, where it is through an opening between The trough bottom and partition enter the other trough area. Through the action of the other agitator arm, the flow is deflected and the sludge between the drum wall and partition moves in the direction of rotation of the drum.

Der Nachteil dieses Drehfilters besteht im wesentlichen in einem sehr hohen Aufwand, der durch den Einsatz des komplizierten und teuren Pendelrührwerkes verursacht wird. Außerdem erfordert dieser Drehfilter einen sehr hohen Energiebedarf. The disadvantage of this rotary filter is essentially one very high effort due to the use of the complicated and expensive pendulum agitator caused. In addition, this rotary filter has a very high energy requirement.

Zweck der Erfindung ist es, die unterschiedliche Feststoffkonzentration sowie die Sedimentation zu vermeiden und damit eine einwandfreie Filterkuchenbildung zu ermöglichen. The purpose of the invention is the different solids concentration as well as the sedimentation too avoid and thus a perfect filter cake formation to enable.

Der Erfindung liegt die Aufgabe zugrunde, die durch den Rührer erzeugte wirbelartige Strömung so zu beeinflussen, daß die Strömungsgeschwindigkeit der Suspension auch in von dem Rührer entfernt liegenden Bereichen so groß ist, daß die Feststoffteilchen dabei gebunden bleiben. The invention is based on the object generated by the stirrer to influence vortex-like flow so that the flow velocity of the suspension is so large, even in areas remote from the stirrer, that the solid particles stay bound.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß, in Drehrichtung der Filtertrommel gesehen, hinter dem Rührer ein nach oben gewölbtes und annähernd über die gesamte Länge des Filtertroges führendes Umlenkblech derart angeordnet ist, daß dessen Längsachse parallel oder annähernd parallel zur Achse des Rührers verläuft. The object is achieved according to the invention in that, in the direction of rotation seen from the filter drum, behind the stirrer an upwardly curved and approximate Over the entire length of the filter trough leading baffle arranged in such a way is that its longitudinal axis is parallel or approximately parallel to the axis of the stirrer runs.

Um die Strömung der Suspension besser beeinflussen zu können, kann das Umlenkblech um seine Längsachse drehbar gestaltet werden. In order to be able to better influence the flow of the suspension, can the baffle can be designed to be rotatable about its longitudinal axis.

Die Erfindung ist an Hand eines Ausführungsbeispieles sowie der Zeichnung erläutert. Es zeigt F i g. 1 den Querschnitt des Drehfilters und F i g. 2 die Seitenansicht. The invention is based on an exemplary embodiment and the drawing explained. It shows F i g. 1 shows the cross section of the rotary filter and FIG. 2 the side view.

In dem Filtertrog 1, der bis zu einem bestimmten Stand mit Flüssigkeit 2 gefüllt ist, rotiert die zur Anschwemmung und Filtration verwendete Trommel 3. Unterhalb der Trommel 3 ist ein Rührer 4 angeordnet. In Drehrichtung der Filtertrommel 3 gesehen ist hinter dem Rührer 4 das Umlenkblech 5 angebracht. Es ist dabei nur durch einen geringen Zwischenraum von dem Außenkreis des Rührers 4 entfernt und fest oder drehbar angeordnet. In the filter trough 1, which is up to a certain level with liquid 2 is filled, the drum 3 used for precoating and filtration rotates. A stirrer 4 is arranged below the drum 3. In the direction of rotation of the filter drum 3, the baffle plate 5 is attached behind the stirrer 4. It's just doing it removed by a small gap from the outer circle of the stirrer 4 and fixed or rotatable.

Die geförderte Suspension wird von dem Umlenkblech 5 gelenkt, strömt an dessen Unterseite entlang und umströmt die dem Rührer 4 entfernteste Kante aufwärts, gelangt an die Trommel 3 oder fließt zwischen der Oberseite des Umlenkbleches 5 und Trommel 3 zu dem Rührer 4 zurück. The conveyed suspension is directed by the baffle plate 5 and flows along its underside and flows around the edge furthest from the stirrer 4 upwards, reaches the drum 3 or flows between the top of the deflection plate 5 and drum 3 back to the stirrer 4.

Claims (2)

Patentansprüche: 1. Rühreinrichtung für Drehfiltertröge, die an der tiefsten Stelle des Filtertroges angeordnet und annähernd über die gesamte Trogbreite reicht und in gleiche Drehrichtung wie die Filtertrommel bewegbar ist, dadurch gekennzeichn e t, daß, in Drehrichtung der Filtertrommel (3) gesehen, hinter dem Rührer (4) ein nach oben gewölbtes und annähernd über die gesamte Länge des Filtertroges (1) führendes Umlenkblech (5) derart angeordnet ist, daß dessen Längsachse parallel oder annähernd parallel zur Achse des Rührers (4) verläuft. Claims: 1. Stirring device for rotary filter troughs that are attached to the located at the lowest point of the filter trough and almost across the entire width of the trough is sufficient and can be moved in the same direction of rotation as the filter drum, marked thereby e t that, seen in the direction of rotation of the filter drum (3), behind the stirrer (4) arched upwards and approximately over the entire length of the filter trough (1) leading Deflection plate (5) is arranged such that its longitudinal axis is parallel or approximately runs parallel to the axis of the stirrer (4). 2. Drehfilter nach Anspruch 1, dadurch gekennzeichnet, daß das Umlenkblech (5) um die Längsachse drehbar angeordnet ist. 2. Rotary filter according to claim 1, characterized in that the deflector plate (5) is arranged rotatably about the longitudinal axis. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 704408. Documents considered: German Patent No. 704408.
DEJ29715A 1965-12-24 1965-12-24 Stirring device for rotary filter troughs Pending DE1254594B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEJ29715A DE1254594B (en) 1965-12-24 1965-12-24 Stirring device for rotary filter troughs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ29715A DE1254594B (en) 1965-12-24 1965-12-24 Stirring device for rotary filter troughs

Publications (1)

Publication Number Publication Date
DE1254594B true DE1254594B (en) 1967-11-23

Family

ID=7203684

Family Applications (1)

Application Number Title Priority Date Filing Date
DEJ29715A Pending DE1254594B (en) 1965-12-24 1965-12-24 Stirring device for rotary filter troughs

Country Status (1)

Country Link
DE (1) DE1254594B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596856A1 (en) * 1992-11-06 1994-05-11 Andritz-Patentverwaltungs-Gesellschaft m.b.H. Filtration process and device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE704408C (en) * 1935-04-14 1941-03-29 A L G Dehne Fa Rotary filter (disc or drum filter)

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE704408C (en) * 1935-04-14 1941-03-29 A L G Dehne Fa Rotary filter (disc or drum filter)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596856A1 (en) * 1992-11-06 1994-05-11 Andritz-Patentverwaltungs-Gesellschaft m.b.H. Filtration process and device

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