WO2003035216A1 - Device for monitoring the layer thickness of filter cakes or bottom deposits - Google Patents

Device for monitoring the layer thickness of filter cakes or bottom deposits Download PDF

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Publication number
WO2003035216A1
WO2003035216A1 PCT/CH2002/000574 CH0200574W WO03035216A1 WO 2003035216 A1 WO2003035216 A1 WO 2003035216A1 CH 0200574 W CH0200574 W CH 0200574W WO 03035216 A1 WO03035216 A1 WO 03035216A1
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Prior art keywords
filter
measuring element
deposits
flange
measuring
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PCT/CH2002/000574
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German (de)
French (fr)
Inventor
Werner Pfiffner
Klaus Stadler
Johannes Luzi
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Werner Pfiffner
Klaus Stadler
Johannes Luzi
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Application filed by Werner Pfiffner, Klaus Stadler, Johannes Luzi filed Critical Werner Pfiffner
Publication of WO2003035216A1 publication Critical patent/WO2003035216A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
    • G01B5/066—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness of coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging

Definitions

  • the invention relates to a device for monitoring the layer thickness of a filter cake built up on a filter element or another carrier or of swamp-like deposits in closed and open containers or outdoors.
  • Optical systems, hollow bodies, differential pressure measurements are known as a measure of the loading with cakes, sound waves or measuring plates. All of these measuring devices are unsatisfactory because they do not allow optimal operation.
  • An optical device has the disadvantage that the measurement does not respond at all if the translucency of the liquid is too low.
  • Another disadvantage is that the light barrier, if it is made of glass, must not come into contact with alkaline solutions; if it is made of plastic, the contact with solvents is restricted. If a hollow body is used, there is a risk of contamination and the entire device is comparatively voluminous.
  • Differential pressure measurements probably work with very poorly filterable media in which a high differential pressure already occurs with a low cake thickness; in the case of media that can be filtered well, however, overloading takes place even at the slightest differential pressure.
  • the measuring heads in ultrasound or radar devices are relatively large and in many cases the detection of the transition from the liquid to the solid phase is very imprecise. With the measuring plate, the disturbance variables are stronger than the useful signal because the pressure drop across the plate is too small.
  • the object of the invention is to provide a measuring device which can prevent an overload when a carrier, for example a filter plate or a filter candle, is not loaded, is not susceptible to contamination and is mechanically stable and at the same time offers great reliability. It should preferably be designed so that it can be used in the environment that occurs in process engineering processes.
  • the invention is essentially characterized in that a spoon-like measuring element by the height of the filter cake rsp. the deflection of the deposit is influenced and the deflection can be transferred via movable components to a displacement sensor which is connected to an electronic evaluation system.
  • the device is preferably used in a disc filter or candle filter. However, it can also be used outdoors or in unpressurized containers.
  • the measuring element is designed as a spoon and is stored in a membrane.
  • the spoon is deflected with minimal effort, for example by a calibrated lifting magnet, which is in a defined starting position by means of weights in the inactive state.
  • the bucket movement is recorded with a displacement sensor. Changes in the height of the deposits or the filter cake restrict the deflection of the spoon and thus the path. If the filter cake has reached a certain layer thickness, the movement of the spoon is restricted accordingly and the downstream evaluation electronics trigger a signal that can be used to control the process.
  • a lifting magnet instead of a lifting magnet, another suitable means for deflecting the spoon can be used, for example spring force, an electric motor or pneumatics.
  • the measuring element As a measuring spoon, there is hardly any risk of contamination. However, if the spoon shows deposits, this will not lead to any noticeable Falsification of measured values, since they act like parts of the spoon.
  • the mechanical design of the monitoring device is mechanically stable. This significantly increases the reliability of the monitoring device.
  • Preferred embodiments of the monitoring device according to the invention are characterized in the subclaims. Their meaning results from the explanation of an embodiment of the invention with reference to a drawing.
  • FIG. 1 shows a vertical partial section of a monitoring device according to the invention
  • FIG. 2 is a three-dimensional representation of this monitoring device.
  • the monitoring device is attached to an adapter flange 1, which can be attached to a container flange 7 provided in the filter container wall 3 at the level of a filter element 5.
  • the monitoring device has a measuring spoon 9 projecting between adjacent filter disks 5 and a membrane 11 carrying the same.
  • the spoon-like measuring element - the measuring spoon - is shown as a stick with a quasi ellipsoidal scoop.
  • it can also be designed differently, for example in a sheet-like or rod-like manner; it is only important here that the measuring element is designed in such a way that its deflectability is adversely affected by an accumulating filter cake by bumping against the filter cake 31.
  • the clamping ring and bearing ring 13 connects the measuring spoon 9 via the membrane 11 to the clamping bolt 15, which is connected to the lifting magnet 19 via the joint head 17.
  • the longitudinal movement of the solenoid 19 is the Transfer disc 23 to the displacement sensor 21.
  • the weights 25 determine the starting position of the measuring spoon 9, which is additionally matched to the position of the filter disks 5 via the two limiters 29. They also determine the maximum deflection of the filter spoon 9.
  • the channels 27 in the adjusting flange 33 of the monitoring device, which adjoins the adapter flange 3, are intended for connection to a flushing device.
  • the movement of the spoon can also be effected in another way, for example pneumatically, by an electric motor or with the aid of spring force as a deflection means.
  • feedthrough can also be used, for example a bellows or an analogue to mechanical feedthroughs known from vacuum technology.
  • the operation of the monitoring device is described using an example.
  • the device is automatically calibrated before the start of a measuring cycle.
  • the lifting magnet 19 moves the measuring spoon 9 over the entire distance and this is mapped and stored as an electrical signal with the aid of the displacement sensor 21.
  • the measuring spoon 9 is then moved periodically, the cake 31 building up preventing the deflection.
  • the difference to the reference value, which is defined at the start of the measuring cycle, gives the cake height, and the resulting signal can be processed by a control or a computer. Filtration can be carried out with the measuring device according to the invention end immediately before contact with the underside of a filter plate 5 through the filter cake 31.
  • An advantage of the invention is that even the smallest back pressure generated by filter cakes or deposits is recognized and transmitted to the control device in the form of a signal. Possible disturbances caused by turbulence or currents in the filter are prevented or compensated for by periodic measurement and comparison with the stored values.
  • the design of the invention also takes into account the use in an explosive environment.

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

Abstract

The device and the method for monitoring layer thicknesses on filter elements is based on displacing a measuring spatula at regular intervals, for example by means of a solenoid. The displacement is measured by means of a displacement sensor and recorded. The displacement is reduced as a result of the cake forming on the filter element and the difference from the reference value is converted into a signal useful for the control of the filter operation, or an alarm signal, by means of an electronic analyser. The efficiency with regard to service intervals can be increased, defects avoided and processes monitored by means of the above device.

Description

VORRICHTUNG ZUR UEBERWACHUNG DER SCHICHTDICKE VON FILTERKUCHEN ODER SUMPFARTIGEN ABLAGERUNGEN DEVICE FOR MONITORING THE LAYER THICKNESS OF FILTER CAKES OR PUMP-LIKE DEPOSITS
Die Erfindung betrifft eine Vorrichtung zur Überwachung der Schichtdicke eines sich auf einem Filterelement oder einem anderem Träger aufbauenden Filterkuchens oder von sumpfartigen Ablagerungen in geschlossenen und offenen Behältern oder im Freien.The invention relates to a device for monitoring the layer thickness of a filter cake built up on a filter element or another carrier or of swamp-like deposits in closed and open containers or outdoors.
Um einen zu starken Aufbau der Ablagerungen oder des Filterkuchens, eine Verstopfung oder Überladung der Filterplatten und dadurch eine Beschädigung von Einrichtungen, Maschinen oder Teilen davon zu vermeiden, ist die Kenntnis der Kuchenhöhe oder der Höhe von Ablagerungen von grosser Bedeutung. Die Berechnung der Feststoffmenge, die den Kuchen aufbaut, ist zwar in einigen Fällen möglich, führt aber bei schwankendem Feststoffanteil bereits zu grossen Ungenauigkeiten, die das Risiko einer Überladung des Trägers nicht ausschliesst. Auch eine zu geringe Höhe der Ablagerungen oder des Filterkuchens ist in manchen Fällen nicht erwünscht, weil dadurch der Auslastungsgrad zu niedrig ist.In order to avoid excessive build-up of the deposits or the filter cake, clogging or overloading of the filter plates and thereby damage to equipment, machines or parts thereof, knowledge of the cake height or the height of deposits is of great importance. The calculation of the amount of solids that builds the cake is possible in some cases, but with fluctuating solids content it already leads to great inaccuracies, which does not exclude the risk of overloading the carrier. In some cases, too low a height of the deposits or the filter cake is not desirable, because this means that the degree of utilization is too low.
Es wurden verschieden Wege vorgeschlagen, um die Kuchendicke oder die Höhe der Ablagerungen zu bestimmen. Bekannt sind optische Systeme, Hohlkörper, Differenzdruckmessungen als Mass für die Beladung mit Kuchen, Schallwellen oder Messplatten. All diese Messvorrichtungen befriedigen nicht, da sie eine optimale Arbeitsweise nicht gestatten. Eine optische Vorrichtung hat den Nachteil, dass die Messung bei einer zu geringen Lichtdurchlässigkeit der Flüssigkeit überhaupt nicht anspricht. Ein weiterer Nachteil ist, dass die Lichtschranke, wenn sie aus Glas besteht, mit keinen alkalischen Lösungen in Kontakt kommen darf; wenn sie aus Kunststoff besteht, die Berührung mit Lösungsmitteln eingeschränkt ist. Wird ein Hohlkörper verwendet, besteht die Gefahr der Verschmutzung und die ganze Vorrichtung ist vergleichsweise voluminös. Differenzdruckmessungen funktionieren wohl bei sehr schlecht filtrierbaren Medien, bei denen ein hoher Differenzdruck bereits bei niedriger Kuchendicke auftritt; bei gut filtrierbaren Medien jedoch findet eine Überladung bereits bei geringsten Differenzdrucken statt. Die Messköpfe bei Ultraschall- oder Radargeräten sind verhältnismässig gross und die Erkennung des Übergangs von der flüssigen in die feste Phase ist in vielen Fällen sehr ungenau. Bei der Messplatte sind die Störgrössen stärker als das Nutzsignal, weil der Druckabfall über der Platte zu klein ist.Different ways have been proposed to determine the cake thickness or the height of the deposits. Optical systems, hollow bodies, differential pressure measurements are known as a measure of the loading with cakes, sound waves or measuring plates. All of these measuring devices are unsatisfactory because they do not allow optimal operation. An optical device has the disadvantage that the measurement does not respond at all if the translucency of the liquid is too low. Another disadvantage is that the light barrier, if it is made of glass, must not come into contact with alkaline solutions; if it is made of plastic, the contact with solvents is restricted. If a hollow body is used, there is a risk of contamination and the entire device is comparatively voluminous. Differential pressure measurements probably work with very poorly filterable media in which a high differential pressure already occurs with a low cake thickness; in the case of media that can be filtered well, however, overloading takes place even at the slightest differential pressure. The measuring heads in ultrasound or radar devices are relatively large and in many cases the detection of the transition from the liquid to the solid phase is very imprecise. With the measuring plate, the disturbance variables are stronger than the useful signal because the pressure drop across the plate is too small.
Es kommt deshalb immer wieder vor, dass Einrichtungen, Maschinen oder Teile davon wegen der Mängel der Kontrollvorrichtung beschädigt rsp. deformiert oder sogar zerstört werden.It therefore happens again and again that equipment, machines or parts thereof are damaged due to the defects in the control device. deformed or even destroyed.
Aufgabe der Erfindung ist es, eine Messvorrichtung zu schaffen, die bei maximaler Beladung eines Trägers, zum Beispiel einer Filteφlatte oder einer Filterkerze, eine Überladung verhindern kann, die nicht anfällig gegenüber Verschmutzungen und mechanisch stabil ist und dabei grosse Zuverlässigkeit bietet. Sie sollte vorzugsweise so konstruiert sein, dass sie in dem in verfahrenstechnischen Prozessabläufen auftretenden Umfeld eingesetzt werden kann. Die Erfindung zeichnet sich im Wesentlichen dadurch aus, dass ein löffelartiges Messelement durch die Höhe des Filterkuchens rsp. der Ablagerung in seiner Auslenkung beeinflusst wird und die Auslenkung über bewegliche Bauteile auf einen Wegsensor übertragbar ist, der mit einer Auswertungselektronik verbunden ist.The object of the invention is to provide a measuring device which can prevent an overload when a carrier, for example a filter plate or a filter candle, is not loaded, is not susceptible to contamination and is mechanically stable and at the same time offers great reliability. It should preferably be designed so that it can be used in the environment that occurs in process engineering processes. The invention is essentially characterized in that a spoon-like measuring element by the height of the filter cake rsp. the deflection of the deposit is influenced and the deflection can be transferred via movable components to a displacement sensor which is connected to an electronic evaluation system.
Die Vorrichtung wird vorzugsweise in einem Scheibenfilter oder Kerzenfilter eingesetzt. Sie kann aber auch im Freien oder in drucklosen Behältern verwendet werden.The device is preferably used in a disc filter or candle filter. However, it can also be used outdoors or in unpressurized containers.
Das Messelement ist - gemäss einer bevorzugten Ausführungsform - als Löffel ausgebildet und in einer Membrane gelagert. Die Auslenkung des Löffels erfolgt mit einem minimalen Kraftaufwand, bspw. durch einen geeichten Hubmagneten, der im inaktiven Zustand mittels Gewichten in einer definierten Ausgangslage steht. Die Löffelbewegung wird mit einem Wegsensor erfasst. Veränderungen in der Höhe der Ablagerungen oder des Filterkuchens beschränken die Auslenkung des Löffels und damit auch den Weg. Hat der Filterkuchen eine bestimmte Schichtdicke erreicht, wird die Bewegung des Löffels entsprechend eingeschränkt und die nachgeschaltete Auswertungselektronik löst ein Signal aus, das für die Steuerung des Vorgangs verwendet werden kann.According to a preferred embodiment, the measuring element is designed as a spoon and is stored in a membrane. The spoon is deflected with minimal effort, for example by a calibrated lifting magnet, which is in a defined starting position by means of weights in the inactive state. The bucket movement is recorded with a displacement sensor. Changes in the height of the deposits or the filter cake restrict the deflection of the spoon and thus the path. If the filter cake has reached a certain layer thickness, the movement of the spoon is restricted accordingly and the downstream evaluation electronics trigger a signal that can be used to control the process.
Anstelle eines Hubmagneten kann auch ein anderes geeignetes Mittel zur Auslenkung des Löffels verwendet werden, bspw. Federkraft, ein Elektromotor oder eine Pneumatik.Instead of a lifting magnet, another suitable means for deflecting the spoon can be used, for example spring force, an electric motor or pneumatics.
Wegen der bevorzugten einfachen Ausbildung des Messelementes als Messlöffel besteht kaum eine Verschmutzungsgefahr. Sollte der Löffel jedoch Ansätze von Ablagerungen aufweisen, so führen diese nicht zu einer merkbaren Messwertverfälschung, da sie wie Teile des Löffels wirken. Die mechanische Ausbildung der Überwachungsvorrichtung ist mechanisch stabil. Dadurch ist die Zuverlässigkeit der Überwachungsvorrichtung entscheidend erhöht.Because of the preferred simple design of the measuring element as a measuring spoon, there is hardly any risk of contamination. However, if the spoon shows deposits, this will not lead to any noticeable Falsification of measured values, since they act like parts of the spoon. The mechanical design of the monitoring device is mechanically stable. This significantly increases the reliability of the monitoring device.
Bevorzugte Ausgestaltungen der erfindungsgemässen Überwachungsvorrichtung sind in den Unteransprüchen gekennzeichnet. Ihre Bedeutung ergibt sich aus der Erläuterung eines Ausführungsbeispiels der Erfindung anhand einer Zeichnung.Preferred embodiments of the monitoring device according to the invention are characterized in the subclaims. Their meaning results from the explanation of an embodiment of the invention with reference to a drawing.
In der Zeichnung zeigt:The drawing shows:
die Figur 1 einen vertikalen Teilschnitt einer erfindungsgemässen Überwachungsvorrichtung, und1 shows a vertical partial section of a monitoring device according to the invention, and
- die Figur 2 eine dreidimensional Darstellung dieser Ueberwachungsvorrichtung.- Figure 2 is a three-dimensional representation of this monitoring device.
Die Überwachungsvorrichtung ist an einem Adapterflansch 1 befestigt, der an einem in der Filterbehälterwand 3 in Höhe eines Filterelements 5 vorgesehenen Behälterflansch 7 anbringbar ist. Die Überwachungsvorrichtung hat einen zwischen benachbarte Filterscheiben 5 ragenden Messlöffel 9 und eine diesen tragende Membrane 11. In der Zeichnung ist das löffelartige Messelement - der Messlöffel - als Stiel mit einem quasi ellipsoiden Schaufel dargestellt. Es kann aber auch anders ausgebildet sein, bspw. blattartig oder stabförmig; wichtig ist hier lediglich, dass das Messelement so ausgebildet ist, dass es in durch einen sich anlagernden Filterkuchen durch Anstossen an den Filterkuchen 31 in seiner Auslenkbarkeit beeinträchtigt wird. Der Spannring und Lagerring 13 verbindet den Messlöffel 9 über die Membrane 11 mit dem Spannbolzen 15, der über den Gelenkkopf 17 mit dem Hubmagnet 19 verbunden ist. Die Längsbewegung des Hubmagneten 19 wird von der Mitnehmerscheibe 23 auf den Wegsensor 21 übertragen. Die Gewichte 25 bestimmen die Ausgangslage des Messlöffels 9, die zusätzlich noch über die beiden Begrenzer 29 auf die Position der Filterscheiben 5 abgestimmt wird. Sie bestimmen auch die maximale Auslenkung des Filterlöffels 9. Die Kanäle 27 im an den Adapterflansch 3 anliegenden Stellflansch 33 der Überwachungsvorrichtung sind für den Anschluss an eine Spülvorrichtung bestimmt.The monitoring device is attached to an adapter flange 1, which can be attached to a container flange 7 provided in the filter container wall 3 at the level of a filter element 5. The monitoring device has a measuring spoon 9 projecting between adjacent filter disks 5 and a membrane 11 carrying the same. In the drawing, the spoon-like measuring element - the measuring spoon - is shown as a stick with a quasi ellipsoidal scoop. However, it can also be designed differently, for example in a sheet-like or rod-like manner; it is only important here that the measuring element is designed in such a way that its deflectability is adversely affected by an accumulating filter cake by bumping against the filter cake 31. The clamping ring and bearing ring 13 connects the measuring spoon 9 via the membrane 11 to the clamping bolt 15, which is connected to the lifting magnet 19 via the joint head 17. The longitudinal movement of the solenoid 19 is the Transfer disc 23 to the displacement sensor 21. The weights 25 determine the starting position of the measuring spoon 9, which is additionally matched to the position of the filter disks 5 via the two limiters 29. They also determine the maximum deflection of the filter spoon 9. The channels 27 in the adjusting flange 33 of the monitoring device, which adjoins the adapter flange 3, are intended for connection to a flushing device.
Anstelle des Antriebs durch den Hubmagneten 19 kann die Bewegung des Löffels auch auf eine andere Art bewirkt werden, bspw. pneumatisch, durch einen Elektromotor oder mit Hilfe von Federkraft als Umlenkmittel.Instead of the drive by the lifting magnet 19, the movement of the spoon can also be effected in another way, for example pneumatically, by an electric motor or with the aid of spring force as a deflection means.
Anstelle der Membrane kann auch ein anderes geeignetes Durchführungsmittel verwendet werden, bspw. ein Balg oder ein Analog zu aus der Vakuumtechnik bekannten mechanischen Durchführungen.Instead of the membrane, another suitable feedthrough can also be used, for example a bellows or an analogue to mechanical feedthroughs known from vacuum technology.
Die Arbeitsweise der Überwachungsvorrichtung ist anhand eines Beispiels beschrieben.The operation of the monitoring device is described using an example.
Vor dem Start eines Messzyklus wird die Vorrichtung automatisch geeicht. Der Hubmagnet 19 bewegt dabei den Messlöffel 9 über die gesamte Strecke und diese wird mit Hilfe des Wegsensors 21 als elektrisches Signal abgebildet und gespeichert. Anschliessend wird der Messlöffel 9 periodisch bewegt, wobei der sich aufbauende Kuchen 31 die Auslenkung behindert. Die Differenz zum Referenzwert, der beim Start des Messzyklus festgelegt wird, ergibt die Kuchenhöhe, und das daraus resultierende Signal kann von einer Steuerung oder einem Rechner verarbeitet werden. Mit der erfindungsgemässen Messvorrichtung lässt sich die Filtration unmittelbar vor Berührung mit der Unterseite einer Filterplatte 5 durch den Filterkuchen 31 beenden.The device is automatically calibrated before the start of a measuring cycle. The lifting magnet 19 moves the measuring spoon 9 over the entire distance and this is mapped and stored as an electrical signal with the aid of the displacement sensor 21. The measuring spoon 9 is then moved periodically, the cake 31 building up preventing the deflection. The difference to the reference value, which is defined at the start of the measuring cycle, gives the cake height, and the resulting signal can be processed by a control or a computer. Filtration can be carried out with the measuring device according to the invention end immediately before contact with the underside of a filter plate 5 through the filter cake 31.
Ein Vorteil der Erfindung ist, dass bereits der kleinste durch Filterkuchen oder Ablagerungen erzeugte Gegendruck erkannt wird und in Form eines Signals an die Steuervorrichtung übertragen wird. Mögliche Störungen verursacht durch Turbulenzen oder Strömungen im Filter werden durch periodisches Messen und Vergleichen mit den gespeicherten Werten verhindert oder kompensiert.An advantage of the invention is that even the smallest back pressure generated by filter cakes or deposits is recognized and transmitted to the control device in the form of a signal. Possible disturbances caused by turbulence or currents in the filter are prevented or compensated for by periodic measurement and comparison with the stored values.
Mit dieser Vorrichtung kann eine Überladung der Filterscheiben auf einfachem, mechanischem Wege vermieden werden. Die Ausbildung einer maximalen Filterkuchenhöhe kann für jedes beliebige, filtrierbare Medium erreicht werden.With this device, overloading of the filter disks can be avoided in a simple, mechanical way. The formation of a maximum filter cake height can be achieved for any filterable medium.
Die Auslegung der Erfindung berücksichtigt auch den Einsatz in einem explosionsgefährdeten Umfeld. The design of the invention also takes into account the use in an explosive environment.

Claims

PATENTANSPRUCHE PATENT CLAIMS
1. Vorrichtung zur Überwachung der Schichtdicke von sich auf einem Filterelement bildenden Anlagerungen (31) mit einem Messelement (9), welches auslenkbar gehalten ist und durch die sich bildenden Anlagerungen (31) in Abhängigkeit von deren Höhe in seiner Auslenkung beeinflusst wird und mit Mitteln, die Auslenkung des Messelements (9) über bewegliche Bauteile auf einen Wegsensor (21) zu übertragen, der mit einer Auswertungselektronik verbunden ist.1. Device for monitoring the layer thickness of deposits (31) forming on a filter element with a measuring element (9), which is held in a deflectable manner and is influenced in its deflection by the deposits formed (31) depending on their height and by means to transmit the deflection of the measuring element (9) via movable components to a displacement sensor (21) which is connected to an electronic evaluation system.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Messelement (9) löffelartig ausgebildet ist.2. Device according to claim 1, characterized in that the measuring element (9) is formed like a spoon.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Filterelement in einem Filterbehälter gehalten ist, dass der Wegsensor (21) ausserhalb des Filterbehälters angeordnet ist, und dass das Messelement (9) in einer den Filterbehälter begrenzenden Membrane (11) gelagert ist.3. Device according to claim 1 or 2, characterized in that the filter element is held in a filter container, that the displacement sensor (21) is arranged outside the filter container, and that the measuring element (9) is mounted in a membrane (11) delimiting the filter container is.
4. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass Antriebsmittel vorhanden sind, mit denen das Messelement automatisiert bewegbar ist, wobei die Antriebsmittel vorzugweise für periodische Bewegung des Messelements ausgebildet sind.4. Device according to one of the preceding claims, characterized in that drive means are provided with which the measuring element can be moved automatically, wherein the drive means are preferably designed for periodic movement of the measuring element.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Antriebsmittel einen Hubmagneten (19) aufweisen. 5. The device according to claim 4, characterized in that the drive means have a lifting magnet (19).
Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Antriebsmittel einen Elektromotor, ein Federelement und/oder einen pneumatischen Antrieb aufweisen. Apparatus according to claim 4, characterized in that the drive means have an electric motor, a spring element and / or a pneumatic drive.
7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sie an einem Adapterflansch (1) befestigt ist, der an einem in der Filterbehälterwand (3) in Höhe eines Filterelements (5) vorgesehenen Behälterflansch (7) anbringbar und über einen Stellflansch (33) in Längsrichtung verstellbar ist.7. Device according to one of the preceding claims, characterized in that it is fastened to an adapter flange (1) which can be attached to a container flange (7) provided in the filter container wall (3) at the level of a filter element (5) and via an adjusting flange ( 33) is adjustable in the longitudinal direction.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass sich im Stellflansch (33) Langlöcher für eine optimale Positionierung befinden.8. The device according to claim 7, characterized in that there are elongated holes in the adjusting flange (33) for optimal positioning.
Vorrichtung nach Anspruch 7 oder 8, gekennzeichnet durch Kanäle (27), im Stellflansch (33), welche eine automatische Spülung ermöglichen.Apparatus according to claim 7 or 8, characterized by channels (27) in the control flange (33) which enable automatic flushing.
10. Vorrichtung nach einem der vorangehenden Ansprüche, gekennzeichnet durch Gewichte (25) und einen Begrenzer (29), welche eine Ausgangsstellung definieren.10. Device according to one of the preceding claims, characterized by weights (25) and a limiter (29) which define a starting position.
11. Verfahren zur Überwachung von Schichtdicken von Anlagerungen auf11. Method for monitoring layer thicknesses of deposits
Filterelementen, wobei ein Messelement so bewegbar angeordnet ist, dass es durch entstehende Anlagerungen in seiner Bewegung beeinträchtigt wird, und wobei das Messelement in regelmässigen Abständen bewegt wird und die Auslenkung der Bewegung gemessen und mit Referenzwerten verglichen wird. Filter elements, wherein a measuring element is arranged so that its movement is impaired by the accumulation of deposits, and the measuring element is moved at regular intervals and the deflection of the movement is measured and compared with reference values.
PCT/CH2002/000574 2001-10-22 2002-10-22 Device for monitoring the layer thickness of filter cakes or bottom deposits WO2003035216A1 (en)

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CH1935/01 2001-10-22
CH19352001 2001-10-22

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Cited By (1)

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WO2015081450A1 (en) * 2013-12-04 2015-06-11 Drm, Dr. Müller Ag Device for measuring the overfill of filter elements comprising filter cakes in pressurized filters

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Publication number Priority date Publication date Assignee Title
US3428176A (en) * 1967-04-25 1969-02-18 Sparkler Mfg Co Means for detecting filter cake buildup
US4070288A (en) * 1975-07-28 1978-01-24 Chemap Ag Disc filter having means for sensing the thickness of filter cakes and method of filtering with the filter
GB1540897A (en) * 1975-06-06 1979-02-21 Riedel De Haen Ag Centrifugal filter
EP0318370A1 (en) * 1987-11-23 1989-05-31 Compagnie Francaise De Sucrerie Method for measuring the thickness of a solid deposit on the walls of a centrifuge, means for carrying out this method and its special application in the production of sugar
EP0456861A1 (en) * 1989-07-29 1991-11-21 Krauss-Maffei Aktiengesellschaft Regulating device for a filtering centrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428176A (en) * 1967-04-25 1969-02-18 Sparkler Mfg Co Means for detecting filter cake buildup
GB1540897A (en) * 1975-06-06 1979-02-21 Riedel De Haen Ag Centrifugal filter
US4070288A (en) * 1975-07-28 1978-01-24 Chemap Ag Disc filter having means for sensing the thickness of filter cakes and method of filtering with the filter
EP0318370A1 (en) * 1987-11-23 1989-05-31 Compagnie Francaise De Sucrerie Method for measuring the thickness of a solid deposit on the walls of a centrifuge, means for carrying out this method and its special application in the production of sugar
EP0456861A1 (en) * 1989-07-29 1991-11-21 Krauss-Maffei Aktiengesellschaft Regulating device for a filtering centrifuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015081450A1 (en) * 2013-12-04 2015-06-11 Drm, Dr. Müller Ag Device for measuring the overfill of filter elements comprising filter cakes in pressurized filters
CN105431216A (en) * 2013-12-04 2016-03-23 Drm穆勒有限公司 Device for measuring the overfill of filter elements comprising filter cakes in pressurized filters

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