DE506961C - Rotary filter for thickening liquids - Google Patents

Rotary filter for thickening liquids

Info

Publication number
DE506961C
DE506961C DEI27974D DEI0027974D DE506961C DE 506961 C DE506961 C DE 506961C DE I27974 D DEI27974 D DE I27974D DE I0027974 D DEI0027974 D DE I0027974D DE 506961 C DE506961 C DE 506961C
Authority
DE
Germany
Prior art keywords
rotary filter
drum
filter
thickened
thickening
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.)
Expired
Application number
DEI27974D
Other languages
German (de)
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.)
HUGO KOSCHMIEDER
Original Assignee
HUGO KOSCHMIEDER
Publication date
Priority to DEI27974D priority Critical patent/DE506961C/en
Application granted granted Critical
Publication of DE506961C publication Critical patent/DE506961C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D33/00Filters with filtering elements which move during the filtering operation
    • B01D33/06Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D33/00Filters with filtering elements which move during the filtering operation
    • B01D33/44Regenerating the filter material in the filter
    • B01D33/46Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers

Landscapes

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

Description

Drehfilter zum Eindicken von Flüssigkeiten Die bisher verwendeten Drehfilter sind in ihrer Leistung dadurch in starkem Maße beschränkt, daß die anhaftende Schicht von geringer Stärke ist und infolge der großen Durchlässigl ; eit einen erheblichen Kraftverbrauch für die Luftbewegung verursacht. Es sind deshalb Einrichtungen geschaffen worden, welche den Zweck haben, die Flüssigkeit einzudicken, bevor sie auf das Filter gelangt.Rotary filter for thickening liquids The previously used Rotary filters are limited in their performance to a great extent by the fact that the adhesive Layer is of low thickness and due to the large permeability; ever one causes considerable power consumption for air movement. They are therefore institutions have been created, which have the purpose of thickening the liquid before it gets on the filter.

Abgesehen von Sedimentationsapparaten sind auch bereits schon Vorrichtungen bekannt geworden, die nach Art eines in einem geschlossenen Behälter rotierenden Drehfilters eine kontinuierliche Eindickung der Trübe in der Weise vornehmen, daß der von dem Abstreicher abgestrichene Schlamm durch die Trübe zu Boden sinkt und bei entsprechender Ausgestaltung des Behälterbodens unter dem Druck der darüberstehenden Flüssigkeit am tiefsten Punkt kontinuierlich entnommen werden kann. Dies hat den Nachteil, daß der abgestrichene Schlamm sich beim Niedersinken wieder sehr stark verdünnt, zumal die ganze Trübe infolge der darin rotierenden Filtertrommel sich in kreisen der Bewegung befindet. Bei Schlämmen, die zur Reinigung der Filterfläche eine Rückspülung hinter dem Abstreicher benötigen, tritt eine weitere Verdünnung des Schlammes durch die Rückspülung ein.Apart from sedimentation apparatus, there are already devices become known, the rotating in a closed container in the manner of a Rotary filter make a continuous thickening of the sludge in such a way that the sludge scraped off by the scraper sinks through the turbidity to the bottom and with a corresponding design of the container bottom under the pressure of the above Liquid can be withdrawn continuously at the lowest point. This has the Disadvantage that the scraped mud is very strong again when it sinks thinned, especially since the whole sludge due to the rotating filter drum in it is in circles of motion. In the case of sludge that is used to clean the filter surface need a backwash after the scraper, a further dilution occurs of the sludge by backwashing.

Es wurde nun gefunden, daß man diesen Übelstand zweckmäßig dadurch beheben und die Vorrichtung wirkungsvoll verbessern kann, daß man in der Drehrichtung der Filtertrommel hinter den Abstreichern Leitbleche derart anordnet, daß eine ungestörte Strömung zwischen den Abstreichern und dem Schlammauslaß entsteht und dieRührwirkung des Drehfilters auf die die Trommel umgebende Trübe, insbesondere in der Trennzone zwischen frischer und eingedickter Trübe, sowie ein Vermischen dieser unter sich und mit der Spülflüssigkeit verhindert wird. It has now been found that this deficiency can be expediently thereby fix and the device can effectively improve that one in the direction of rotation the filter drum behind the scrapers arranges baffles in such a way that an undisturbed There is a flow between the scrapers and the sludge outlet and the stirring effect of the rotary filter on the pulp surrounding the drum, especially in the separation zone between fresh and thickened cloudiness, as well as mixing these with each other and is prevented with the flushing liquid.

Eine Ausführungsform dieser Einrichtung zeigen Fig. I und 2. Die einzudickende Brühe läuft durch das Rohr a zu. Durch Druck im Flüssigkeitsraum oder Vakuum in der Drehtrommel wird ein Teil der Flüssigkeit durch die Filtertrommel b abgeführt. Mittels eines Abstreichers c, durch Rückspülen mit Wasser oder Filtrat oder mittels Druckluft wird in bekannter Weise das Abheben des Schlammes bzw die Reinigung der Filterschicht vorgenommen. Durch Stutzen d wird der eingedickte Schlamm zur weiteren Verarbeitung abgeführt. Das Leitblech e verhindert, daß nach dein Abheben der eingedicktenSchlammschicht die imTrichter befindliche eingedickte Trübe wieder durch Spülflüssigkeit oder zulaufende frische Trübe verdünnt wird. An embodiment of this device is shown in FIGS Broth to be thickened runs through pipe a. By pressure in the liquid space or Vacuum in the rotating drum is some of the liquid through the filter drum b discharged. By means of a scraper c, by backwashing with water or filtrate or by means of compressed air, the lifting of the sludge or the Cleaning of the filter layer made. The thickened sludge is released through nozzle d discharged for further processing. The baffle e prevents that after you take off the thickened sludge in the funnel again is diluted by rinsing liquid or incoming fresh pulp.

Claims (1)

P A T E N T A N S P R U C H : Vorrichtung zum Eindicken mittels Drehfilter, dessen Trommel dauernd unter Flüssigkeitsabschluß stellt und bei dem die eingedickte Trübe während des Zulaufs frischer Trübe ununterbrochen abgeführt wird, dadurch gekennzeichnet, daß in der Drehrichtung der Filtertrommel (b) hinter den Abstreichern (c) Leitbleche (e) derart angeordnet sind, daß eine ungestörte Strömung zwischen den Abstreichern (c) und dem Schlammauslaß (di entsteht und die Rührwirkung des Drehfilters auf die die Trommel umgebende Trübe, insbesondere in der Trennzone zwischen frischer und eingedickter Trübe, sowie ein Vermischen dieser unter sich und mit der Spülflüssigkeit verhindert wird. P A T E N T A N S P R U C H: Device for thickening with a rotary filter, whose drum is permanently sealed off from liquids and in which the thickened Turbidity is continuously removed during the inflow of fresh turbidity, thereby characterized in that in the direction of rotation of the filter drum (b) behind the scrapers (C) baffles (e) are arranged so that an undisturbed flow between the scrapers (c) and the sludge outlet (di arises and the stirring effect of the Rotary filter on the pulp surrounding the drum, in particular in the separation zone between fresh and thickened cloudiness, as well as mixing these with and with each other the flushing liquid is prevented.
DEI27974D Rotary filter for thickening liquids Expired DE506961C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI27974D DE506961C (en) Rotary filter for thickening liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI27974D DE506961C (en) Rotary filter for thickening liquids

Publications (1)

Publication Number Publication Date
DE506961C true DE506961C (en) 1930-09-10

Family

ID=7186912

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI27974D Expired DE506961C (en) Rotary filter for thickening liquids

Country Status (1)

Country Link
DE (1) DE506961C (en)

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