DE2631597A1 - Back flushing filter for sewage analyser - with semicircular deflector in central section flanked by sinter filter discs (NL 17.1.78) - Google Patents
Back flushing filter for sewage analyser - with semicircular deflector in central section flanked by sinter filter discs (NL 17.1.78)Info
- Publication number
- DE2631597A1 DE2631597A1 DE19762631597 DE2631597A DE2631597A1 DE 2631597 A1 DE2631597 A1 DE 2631597A1 DE 19762631597 DE19762631597 DE 19762631597 DE 2631597 A DE2631597 A DE 2631597A DE 2631597 A1 DE2631597 A1 DE 2631597A1
- Authority
- DE
- Germany
- Prior art keywords
- filter
- backwash
- sewage
- central section
- discs
- 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
Links
- 239000010865 sewage Substances 0.000 title abstract description 5
- 238000011010 flushing procedure Methods 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002351 wastewater Substances 0.000 claims description 17
- 238000000746 purification Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 239000012065 filter cake Substances 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004457 water analysis Methods 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
- B01D29/01—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
- B01D29/54—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 arranged concentrically or coaxially
-
- 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
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
- B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor 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
- 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
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
- B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream
-
- 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
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
- B01D29/945—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
Description
Rückspülfilter zur Abwasser-ReinizungBackwash filter for wastewater purification
Die Erfindung betrifft ein Rückspülfilter zur Abwasser-Reinigung, bestehend aus zwei gleichen Filterelementen und einer Rückspülvorrichtung, wobei ein Teil des bereits gefilterten Probenwassers abwechselnd durch eines der beiden Filterelemente zurückgedriickt wird und die Filterelementoberfläcjien durch die vom Beipaß-Strom erzeugte Schleuderwirkung von Ablagerungen freigehalten werden.The invention relates to a backwash filter for waste water purification, consisting of two identical filter elements and a backwash device, whereby a part of the already filtered sample water alternately through one of the two Filter elements is pushed back and the filter element surfaces through the the centrifugal effect generated by the bypass current can be kept free of deposits.
Derartige Filter zur Abwasser-Reinigung werden üblicherweise Wasseranalysengeräten, wie z. B. TOC-Meßgeräten u. a., vorgeschaltet, um diese Geräte vor Verschmutzungen durch im Abwasser enthaltene feste Teilchen zu schützen.Such filters for wastewater purification are usually water analysis devices, such as B. TOC measuring devices u. A., Upstream to protect these devices from contamination to be protected by solid particles contained in the wastewater.
Die Rückspülfilter, bei denen durch die Rückspülung ein Reinigungseffekt des verschmutzten Filtermaterials einsetzt, haben sich weitgehend beim Einsatz zur Abwasserreinigung für Analysenzwecke durchgesetzt.The backwash filters, which have a cleaning effect through backwashing of the soiled filter material used, have largely been used for Wastewater purification enforced for analytical purposes.
Ein bekannter Rückspülfiltertyp ist das sog. Swirlklean-Filter.A well-known type of backwash filter is the so-called Swirlklean filter.
Bei diesem Filter wird die zu filtrierende Flüssigkeit unter Druckwirkung tangential in eine Filterkammer geschickt, deren Boden und Decke mit Filterscheiben bedeckt sind. Ein Teil der durch die Filterkammer geschickten Flüssigkeit wird wechselweise durch die beiden Filterscheiben filtriert: wird durch die eine Filterscheibe filtriert, ist der Weg durch die andere Filterscheibe gesperrt.With this filter, the liquid to be filtered is under pressure sent tangentially into a filter chamber, the floor and ceiling of which are covered with filter discs are covered. Part of the liquid sent through the filter chamber becomes alternating filtered through the two filter discs: is filtered through one filter disc, the path through the other filter disc is blocked.
Durch einen einstellbaren Taktgeber wird im Moment des Umschaltens der vorher gesperrte Weg frei, und das vorher gebrauchte Filter erhält einen Rückspülstrom mit bereits gefiltertem Abwasser von der Ablaufseite, wodurch der Filterkuchen in die Durchflußkammer abgestoßen wird. Durch die Schleuderwirkung der Beinaß-Flüssigkeit werden die abgeschiedenen Teilchen von der Filterscheibe entfernt.An adjustable clock is used at the moment of switching the previously blocked path is free, and the previously used filter receives a backwash flow with already filtered wastewater from the discharge side, whereby the filter cake in the flow chamber is repelled. Due to the centrifugal effect of the liquid the separated particles are removed from the filter disc.
Die Praxis hat gezeigt, daß die bekannten Swirlklean-Filter für stark verschmutztes Abwasser nur bedingt geeignet sind. Die Filterscheiben, meist aus Kunststoff, setzen sich innerhalb kurzer Zeit zu und müssen ausgetauscht werden. Außerdem erwies sich die Schleuderwirkung durch den Beipaßstrom als ungenügend, da durch den tangentialen Zu- und Ablauf im wesentlichen Teilchen nur von den Randzonen der Filterscheiben entfernt werden. Die mittleren Zonen dagegen setzen sich im Betrieb immer mehr zu. Die Standzeit des Filters wird somit erheblich verkürzt, und häufige Reinigungen, die aufwendig sind, sind erforderlich.Practice has shown that the well-known Swirlklean filter for strong polluted wastewater are only suitable to a limited extent. The filter discs, mostly off Plastic, clog within a short time and must be replaced. In addition, the Spin effect due to the bypass flow as insufficient, since the tangential inflow and outflow essentially means particles can only be removed from the edge zones of the filter discs. The middle zones, on the other hand become more and more clogged in operation. The service life of the filter is therefore considerable shortened, and frequent cleaning, which is expensive, is required.
Aufgabe der Erfindung ist es, ein Rückspülfilter zur Abwasser-Reinigung auf der Basis der Swirlklean-Filter zu schaffen, das betriebssicher, wartungsarm und kontinuierlich Abwässer für Analysenzwecke zu filtrieren vermag.The object of the invention is to provide a backwash filter for wastewater purification on the basis of the Swirlklean filter that is operationally reliable and requires little maintenance and able to continuously filter waste water for analytical purposes.
Diese Aufgabe wird erfindungsgemäß durch ein Swirlklean-Rückspülfilter gelöst, bei dem in der Durchflußkammer hinter dem Zulauf ein nahezu halbkreisförmiges und zur Mitte weisendes Leitblech angeordnet ist.According to the invention, this object is achieved by a Swirlklean backwash filter solved, in which in the flow chamber behind the inlet an almost semicircular and baffle plate pointing towards the center is arranged.
Das Leitblech ist an einer Stelle mit einem Durchlaß versehen.The guide plate is provided with a passage at one point.
Der Durchlaß an einer Stelle des Leitbleches kann durch eine Öffnung im Leitblech oder durch eine Einengung der Querschnittsfläche des Leitbleches bewirkt werden.The passage at one point on the baffle can be through an opening caused in the baffle or by narrowing the cross-sectional area of the baffle will.
Für die beiden Filterelemente des Rückspülfilters werden vorzugsweise Sintermetallscheiben verwendet.For the two filter elements of the backwash filter are preferably Sintered metal disks used.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigen - Fig. 1 a einen Schnitt durch das erfindungsgemäße Rückspülfilter - Fig. 1 b einen Schnitt entlang der Achse A - B von Fig. 1 a Gemäß Fig. 1 a besteht das erfindungsgemäße Filter aus drei Teilen, den beiden äußeren Deckeln 1 und 3 sowie der inneren Ringscheibe 2.An embodiment of the invention is shown in the drawings and is described in more detail below. It shows - Fig. 1 a a section through the backwash filter according to the invention - FIG. 1 b shows a section along the axis A. FIG - B of Fig. 1 a According to Fig. 1 a, the filter according to the invention consists of three parts, the two outer covers 1 and 3 and the inner ring disk 2.
Die beiden Deckel 1 und 3 besitzen Öffnungen 4 und 5 zum Auslaß des gereinigten Abwassers. In entsprechenden Rezessen der Deckel 1 und 3 sind zwei Filterscheiben 6 und 7 angeordnet, wodurch der Innenraum des Filters in drei Kammern 12, 13, 14 aufgeteilt wird.The two covers 1 and 3 have openings 4 and 5 to the outlet of the purified wastewater. In the corresponding recesses of the cover 1 and 3 are two filter discs 6 and 7, whereby the interior of the filter is divided into three chambers 12, 13, 14 is divided.
Weiterhin ist im Innern der mittleren Kammer 13 an der Ringscheibe 2 ein nahezu halbkreisförmiges Leitblech 8 befestigt, das beispielsweise mit einer Öffnung 9 versehen ist.Furthermore, the interior of the central chamber 13 is on the annular disk 2 an almost semicircular baffle 8 attached, for example with a Opening 9 is provided.
Die Form des Leitbleches 8 wird besonders aus Fig. 1 b deutlich.The shape of the guide plate 8 is particularly clear from FIG. 1 b.
Weiterhin ist der Zulauf 10 und der Ablauf 11 des ungereinigten Abwassers durch entsprechende Bohrungen in der Ringscheibe 2 dargestellt. Der Zulauf 10 und der Ablauf 11 sind tangential zur mittleren Kammer 13 angeordnet.Furthermore, the inlet 10 and the outlet 11 of the untreated wastewater represented by corresponding bores in the annular disk 2. The inlet 10 and the outlet 11 are arranged tangentially to the central chamber 13.
Die Filterscheiben 6 und 7 bestehen aus hochporösem Sintermetall, durch dessen Filterfeinheit - z. B. 5 pm - die Größe der abgeschiedenen Feststoffe bestimmt wird. Durch geeignete Wahl der Filtereinsätze 6 und 7 wird somit eine Anpassung an den jeweiligen Verschmutzungsgrad erzielt. Diese Sintermetalle haben die Eigenschaft der Beständigkeit gegen Säuren sowie neutrale und basische Salze, die in vielen Fällen in den zu untersuchenden Abwässern enthalten sein können. Weiterhin haben die Sintermetalle den Vorteil, daß Schmutzteilchen an ihnen weniger stark haften als beispielsweise an den in bekannten Filtern verwendeten Papier-oder Kunststoffilterscheiben, so daß die Reinigung problemloser vonstatten geht.The filter discs 6 and 7 are made of highly porous sintered metal, by its filter fineness - z. B. 5 pm - the size of the deposited solids is determined. A suitable choice of the filter inserts 6 and 7 thus results in an adaptation achieved on the respective degree of pollution. These sintered metals have the property the resistance to acids as well as neutral and basic salts, which are found in many Cases may be contained in the wastewater to be examined. Continue to have the sintered metals have the advantage that dirt particles adhere to them less strongly than, for example, on the paper or plastic filter discs used in known filters, so that cleaning is easier.
Im folgenden soll die Wirkungsweise des erfindungsgemäßen Rückspülfilters erläutert werden.The following describes the mode of operation of the backwash filter according to the invention explained.
Das ungereinigte Abwasser fließt im Beipaß-Strom über den Zulauf 10 und den Ablauf 11 kontinuierlich durch das Filter. Durch einen auf das Rohwasser wirkenden Druck von ca. 3 bar, beispielsweise durch eine Pumpe erzeugt, wird ein Teil des Rohwassers durch eine der beiden Filterscheiben 6 oder 7 gedrückt und somit filtriert.The untreated wastewater flows in the bypass stream via inlet 10 and the drain 11 continuously through the filter. Through one on the raw water acting pressure of approx. 3 bar, for example generated by a pump, is a Part of the raw water pressed through one of the two filter discs 6 or 7 and thus filtered.
Durch eine nicht dargestellt, da bekannte Vorrichtung, bestehend beispielsweise aus einer Druckluftquelle, einem Druckluftverteiler, mechanischen Absperrungsorganen und einem Taktgeber, wird jeweils wechselweise eine Filterscheibe gesperrt, während der Weg durch die andere Filterscheibe frei ist. Da sich mit der Zeit das jeweils gebrauchte Filterelement durch die Abscheidung der Feststoffe zusetzt, erhält im Moment des Umschaltens von einer Filterscheibe auf die andere durch den einstellbaren Taktgeber das vorher gebrauchte Filter einen Rückspülstrom mit bereits gefiltertem Abwasser von der Ablaufseite, wodurch der Filterkuchen in die Durchflußkammer 13 abgestoßen oder zumindest soweit gelockert wird, daß er durch den Beipaß-Strom des ungereinigten Abwassers abgelöst und abtransportiert werden kann.By a device not shown because it is known, for example from a compressed air source, a compressed air distributor, mechanical shut-off devices and a clock, a filter disc is alternately blocked while the path through the other filter disc is clear. Since over time each used filter element clogs through the separation of solids, receives im Moment of switching from one filter disc to the other through the adjustable one The previously used filter clocks a backwash flow with an already filtered one Waste water from the discharge side, whereby the filter cake in the flow chamber 13 repelled or at least loosened so far that it is by the bypass flow of the untreated wastewater can be detached and transported away.
Damit dieser Ablösungsprozeß wirksam sein kann, muß das ungereinigte Abwasser über die gesamte Fläche der Filterscheibe 6 oder 7 hinreichend turbulent sein, um die anhaftenden Teilchen durch Schleuderwirkung abzuwaschen. Der bei den bekannten Rückspülfiltern verwendete tangentiale Zu- und Ablauf des ungereinigten Abwassers allein ist nicht genügend wirksam, da das Abwasser am Rand der Filterscheiben zwar ausreichend turbulent ist und dort die Feststoffteilchen abgelöst werden, in der Mitte jedoch praktisch Stillstand herrscht und die Verschmutzungen dort nicht abgelöst werden.In order for this detachment process to be effective, the unpurified must Wastewater over the entire surface of the filter disk 6 or 7 is sufficiently turbulent be to wash off the adhering particles by centrifugal action. Of both known backwash filters used tangential inflow and outflow of the uncleaned Sewage alone is not effective enough because the sewage is on the edge of the filter discs Although it is sufficiently turbulent and the solid particles are detached there, in in the middle, however, there is practically a standstill and the pollution there is not be replaced.
Durch die erfindungsgemäße Verwendung des Le tblechs 8 mit einem Durchlaß an einer Stelle wird der Beipaß-Strom in zwei Ströme aufgeteilt, in einen Strom, der wie bisher im wesentlichentangential, verläuft, und in einen weiteren Strom, der durch zur Mitte der Filterscheiben 6 bzw. 7 geleitet wird.By using the Le tblech 8 with a passage at one point according to the invention, the bypass flow is divided into two flows, in a flow, which, as before, essentially tangential, and in a further flow, which runs through is directed to the center of the filter discs 6 and 7, respectively.
Auf diese Weise werden auch die mittleren Zonen der Filterscheiben 6 und 7 von Verschmutzungen freigehalten.In this way, the middle zones of the filter discs are also made 6 and 7 kept free from contamination.
Die mit dem erfindungsgemäßen Rückspülfilter erzielten Vorteile beruhen somit in einer erheblichen Verlängerung der Wartungsintervalle und einer Verbesserung der Betriebssicherheit.The advantages achieved with the backwash filter according to the invention are based thus a considerable extension of the maintenance intervals and an improvement operational safety.
L e e r s e i t eL e r s e i t e
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762631597 DE2631597A1 (en) | 1976-07-14 | 1976-07-14 | Back flushing filter for sewage analyser - with semicircular deflector in central section flanked by sinter filter discs (NL 17.1.78) |
| NL7707801A NL7707801A (en) | 1976-07-14 | 1977-07-13 | BACKWASH FILTER. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762631597 DE2631597A1 (en) | 1976-07-14 | 1976-07-14 | Back flushing filter for sewage analyser - with semicircular deflector in central section flanked by sinter filter discs (NL 17.1.78) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2631597A1 true DE2631597A1 (en) | 1978-01-19 |
Family
ID=5982974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762631597 Pending DE2631597A1 (en) | 1976-07-14 | 1976-07-14 | Back flushing filter for sewage analyser - with semicircular deflector in central section flanked by sinter filter discs (NL 17.1.78) |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2631597A1 (en) |
| NL (1) | NL7707801A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0519801A1 (en) * | 1991-06-20 | 1992-12-23 | Moatti Filtration Sa | Fluid filter comprising two filtration assemblies |
-
1976
- 1976-07-14 DE DE19762631597 patent/DE2631597A1/en active Pending
-
1977
- 1977-07-13 NL NL7707801A patent/NL7707801A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0519801A1 (en) * | 1991-06-20 | 1992-12-23 | Moatti Filtration Sa | Fluid filter comprising two filtration assemblies |
| US5378363A (en) * | 1991-06-20 | 1995-01-03 | Christophe; Theophile | Fluid filter |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7707801A (en) | 1978-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| OHW | Rejection |