DE328878C - Device to improve the residual filtration in precoat filters - Google Patents
Device to improve the residual filtration in precoat filtersInfo
- Publication number
- DE328878C DE328878C DE1919328878D DE328878DD DE328878C DE 328878 C DE328878 C DE 328878C DE 1919328878 D DE1919328878 D DE 1919328878D DE 328878D D DE328878D D DE 328878DD DE 328878 C DE328878 C DE 328878C
- Authority
- DE
- Germany
- Prior art keywords
- filter
- filtration
- residual
- improve
- precoat filters
- 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
- 238000001914 filtration Methods 0.000 title claims description 15
- 239000000706 filtrate Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Description
Einrichtung zur Verbesserung der Restfiltration bei Anschwemmfiltern.Device to improve the residual filtration in precoat filters.
Ansehwemmfilter bestehen bekanntlich aus meist vertikal in einem umgebenden Gehäuse angeordneten Filterelementen, auf welche die Filtermasse (meist Asbestfaser mit oder ohne Zusatz von Cellulose, Kieselgur u. dgl.) in dünner Schicht angeschwemmt wird. As is well known, alluvial filters consist of mostly vertical in one surrounding housing arranged filter elements on which the filter mass (usually Asbestos fiber with or without the addition of cellulose, kieselguhr, etc.) in a thin layer is washed ashore.
Die Filtrationsgeschwindigkeit verlangsamt sich mit der zunehmenden Verstopfung der Filterschicht. Sinkt sie unter ein brauchbares lMal3, so unterbricht man die Zuführung weiterer trüber Flüssigkeit und läßt den im Gehäuse stehenden Rest unfiltrierter Flüssigkeit unter natürlichem Druck oder mittels Preßluft durch die Filterelemente zu Ende filtrieren. The filtration speed slows down with increasing Blockage of the filter layer. If it sinks below a usable 1Mal3, then interrupts the supply of further cloudy liquid and leaves the one standing in the housing Remaining unfiltered liquid under natural pressure or by means of compressed air filter the filter elements to the end.
Diese »Restfiltration« ist immer langwierig und kann bei starker Ausnutzung, d. h. Verstopfung der Filterschicht, stundenlang dauern. Sie erfolgt gegen Schluß immer langsamer, weil die eintauchende, d. h. filtrierende Fläche der Filterelemente mit fallendem Flüssigkeitsstande zunehmend kleiner wird. This "residual filtration" is always protracted and can occur with strong Utilization, d. H. Clogging of the filter sheet, last for hours. It takes place towards the end slower and slower because the immersed, d. H. filtering surface of the Filter elements with falling liquid level becomes increasingly smaller.
Schließlich bleibt ein mehr oder weniger großer Rest unfiltrierter Flüssigkeit im Filter zurück, der mit einem besonderen kleinen Filter zu Ende filtriert werden muß. Auch läßt die Qualität des Restfiltrates meist zu wünschen, weil, besonders bei Verwendung von Preßluft, leicht trübende Stoffe von der luftberübrten, verschmutzten Filtersehieht in das Filtrat übergehen.Finally, a more or less large residue remains unfiltered Liquid back in the filter, which is filtered through a special small filter must become. The quality of the residual filtrate also leaves something to be desired because, especially when using compressed air, slightly cloudy substances from the air-covered, soiled ones The filter will pass into the filtrate.
Bei vorliegender Erfindung wird die Verbesserung, der Restfiltration durch Anordnung eines besonderen horizontalen Filterelementes am tiefsten Punkte des Filtergehäuses erreicht. Dieses Restfilterelem ent arbeitet nach Bedarf mit den anderen Siebrahmen zusammen oder für sich allein. In the present invention, the improvement is the residual filtration by placing a special horizontal filter element at the lowest point of the filter housing reached. This residual filter element also works as required the other screen frame together or on its own.
Die beiliegende Zeichnung gibt ein schematisches Bild der Erfindung. Im Filtergehäuse a stehen die vertikalen Filterelemente b in bekannter Weise hintereinander. Das Filtrat läuft unten durch Rohr c und Hahn d ab. Am tiefsten Punkte-des Gehäuses a ist horizontal das sich über die ganze Bodenfläche erstreckende Restfilterelement f angeordnet, dessen Filtrat durch Rohr g und Hahn h abläuft und sich zweckmäßig im Abflußrohr mit dem Filtrat der Filterelemente h vereinigt. neim »Anschwemmen« der Filtermasse werden die Hähne d und h geöffnet, so daß sich auf den Filterelementen b sowohl als auch auf dem Restfilterelement f die filtrierende Schicht niederschlagen kann. Sobald jedoch aus Rohr i blankes Filtrat austritt, wird Hahn h geschlossen und erfolgt jetzt die Filtration lediglich durch die Filterelemente b Sind ; diese so weit verstopft, daß Restfiltration nötig wird, so öffnet man Hahn h, während Hahn d geschlossen wird. Nunmehr tritt. das betriebsbereite, noch unverschmutzte Filterelement f in Tätigkeit und filtriert den Restinhalt des Filtergehäuses floot und tadellos bis zu Ende. Die Qualität der Filtration bleibt bis zuletzt gut, weil infolge der Anordnung des Restfilterelementes am Boden keine. Luft mit der Filtrationsfläche in Rerührung kommt. The accompanying drawing gives a schematic picture of the invention. In the filter housing a, the vertical filter elements b stand one behind the other in a known manner. The filtrate runs down through pipe c and tap d. At the lowest point of the housing a is the horizontal residual filter element that extends over the entire floor area f arranged, the filtrate drains through pipe g and tap h and is expedient combined in the drain pipe with the filtrate of the filter elements h. neim "alluvial" The taps d and h of the filter material are opened so that they are on the filter elements b, as well as depositing the filtering layer on the residual filter element f can. However, as soon as bare filtrate emerges from tube i, stopcock h is closed and now the filtration takes place only through the filter elements b are; these clogged so far that residual filtration is necessary, open tap h while Cock d is closed. Now step. the ready-to-use, still unpolluted Filter element f in action and filters the remaining contents of the filter housing floot and impeccable to the end. The quality of the filtration remains good until the end, because as a result of the arrangement of the residual filter element on the bottom none. air comes into contact with the filtration surface.
Die neue Einrichtung bat auch noch den Vorzug, selbst recht große Filter zur gelegentlichen Filtration relativ kleiner Flüssigkeitsmengeu benutzen zu können. Man entfernt bzw. schaltet dann die Elemente b aus und arbeitet nur mit dem Restfilterelement f, das infolge seiner horizontalen Anordnung schon Flüssigkeitsmengen von 10 bis. 201 zu verarbeiten vermag. The new facility also had the privilege of being quite large Use filters for the occasional filtration of relatively small amounts of liquid to be able to. You remove or switch off the elements b and only work with them the residual filter element f, which, due to its horizontal arrangement, already has amounts of liquid from 10 to. 201 is able to process.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE328878T | 1919-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE328878C true DE328878C (en) | 1920-11-08 |
Family
ID=6186464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1919328878D Expired DE328878C (en) | 1919-08-23 | 1919-08-23 | Device to improve the residual filtration in precoat filters |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE328878C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE912689C (en) * | 1938-09-01 | 1954-06-03 | Fritz Scheibler Fa | Device for washing out or leaching out the filter cake as well as for even emptying and empty filtering of filter devices |
-
1919
- 1919-08-23 DE DE1919328878D patent/DE328878C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE912689C (en) * | 1938-09-01 | 1954-06-03 | Fritz Scheibler Fa | Device for washing out or leaching out the filter cake as well as for even emptying and empty filtering of filter devices |
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