DE506961C - Rotary filter for thickening liquids - Google Patents
Rotary filter for thickening liquidsInfo
- 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
Links
- 239000007788 liquid Substances 0.000 title claims description 10
- 230000008719 thickening Effects 0.000 title claims description 5
- 239000010802 sludge Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000011001 backwashing Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B01D33/44—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
- B01D33/466—Regenerating 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)
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) |
-
0
- DE DEI27974D patent/DE506961C/en not_active Expired
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