EP2025938B1 - Device for separating interfering solid matter from biosuspensions - Google Patents

Device for separating interfering solid matter from biosuspensions Download PDF

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Publication number
EP2025938B1
EP2025938B1 EP08013242A EP08013242A EP2025938B1 EP 2025938 B1 EP2025938 B1 EP 2025938B1 EP 08013242 A EP08013242 A EP 08013242A EP 08013242 A EP08013242 A EP 08013242A EP 2025938 B1 EP2025938 B1 EP 2025938B1
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EP
European Patent Office
Prior art keywords
slots
rotary
pump
housing wall
housing
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EP08013242A
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German (de)
French (fr)
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EP2025938A3 (en
EP2025938A2 (en
Inventor
Paul Krampe
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Hugo Vogelsang Maschinenbau GmbH
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Hugo Vogelsang Maschinenbau GmbH
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Priority to PL08013242T priority Critical patent/PL2025938T3/en
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Publication of EP2025938A3 publication Critical patent/EP2025938A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/24—Fluid mixed, e.g. two-phase fluid

Definitions

  • the invention relates to a device for separating off interfering solids (stones, iron parts, pieces of wood, fibers) from fiber-rich biosuspensions for feeding systems, for fermenter feed of biogas plants and the like., Having a rotary lobe pump and connected to the rotary piston impoundment collector.
  • Such a device is from the DE 201 18 068 U1 known, which discloses the preamble of claim 1.
  • driers of organic origin For mixing tasks in agriculture, driers of organic origin must be treated with liquid in such a way that a pumpable suspension is produced.
  • Examples of this are feeding systems in which the solids serve as a source of food, or about the fermenter feed in biogas plants, where the dry matter supply, the gas yield can be increased.
  • the resulting suspension has a high dry matter content with corresponding poor flow properties, so centrifugal pumps as Conveyor can not be used.
  • centrifugal pumps as Conveyor can not be used.
  • positive displacement pumps for example rotary lobe pumps
  • feed screws for filling are usually used, which are equipped with feed screws for filling.
  • Solid / liquid separating devices are known, which are constructed on a screw and a sieve. In this process, a press screw compresses solid and, if possible, fiber-rich material into a plug, from which the liquid is pressed out. This is counterproductive in the sense of the task at hand, because in addition to the impurities also the organic solids are deposited, which are just to be promoted further.
  • centrifuge systems such as decanters, which also deposit all solids and can not distinguish between troublesome stones and more or less desirable fibers.
  • hydrocyclones which separate the heavy solids from the liquid by means of accelerated flow of the medium and spiral deflection into a conical container.
  • this principle is unsuitable for highly viscous liquids.
  • a modified rotary lobe pump is proposed, the housing wall of which is designed to be permeable to liquid.
  • the permeability is achieved, for example, in that the housing wall is designed with slot-shaped gaps which extend in the circumferential direction.
  • the rotary pistons are provided with projections which correspond to the slots in the Housing wall are formed complementary, and that the rotary pistons mesh with each other and with the slots in the housing wall.
  • 9 denotes a rotary piston pump, in the manner in which such rotary piston pumps are known.
  • the housing has been modified and will be discussed later.
  • the supply is called a suspension.
  • the rotating rotary pistons 8 and 9 ensure that the suspension can emerge laterally from the slot housing 21 via slots, as indicated by reference numeral 11.
  • the suspension can be removed via a pump 13 for further processing via a line 14.
  • the supply 10 for the suspension opposite a collector 15 is provided in which all the substances can be collected that can not pass through the slots.
  • the housing 15 is provided with a provided lateral access opening 12 to remove the accumulating over time interfering solids can.
  • Fig. 2 shows the slot housing 21 and support members 23, which ensure that the housing holds together.
  • Fig. 3a shows the exterior of the rotary pump 9 in the device according to the invention. It can be seen the slot housing 21 and the supports 23rd
  • the Fig. 3b represents a partial enlargement of part of the in Fig. 3a shown rotary lobe pump.
  • this is a schematic representation, namely, because the individual columns or slots are represented with different sizes in order to make it clear that a housing, for example, with a gap width of s1 and another rotary pump can be equipped with columns s2.
  • impurities such as stones, pieces of wood, iron parts and the like.
  • S1 would be on the order of 1 mm to 20 mm.
  • s2 has a range of 0.1 mm to 1 mm. It depends on the dimensioning of the column, when it comes to whether contaminants should be removed from a suspension or whether only fibers of a certain size should be brought out of a suspension.
  • the slots or gaps have a circumferential orientation. Also conceivable for the purposes of the present invention, other embodiments of the liquid permeability of the housing wall 21 of the rotary piston pump. 9
  • the impurities leave the separator upwards. It forms first a liquid-enclosed foreign body plug, from which the liquid can flow through the housing column.
  • the length of the Pressure line determines the proportion of residual moisture in the separated solid.
  • the rotary pistons from a hard material which has a low coefficient of friction with respect to the foreign bodies to be deposited, so that the foreign bodies can be easily conveyed further.
  • the housing slots are replaced by a housing wall with slit-shaped columns extending in the circumferential direction.
  • the rotary pistons 8 and 9 can be provided with a thick rubber layer, so that a certain flexibility in crushing situations is present.
  • the width of the housing slots determines the minimum size of the depositable foreign matter. By choosing the slot width, the size of the deposited impurities can be determined. It is a cost-effective construction, since the drive unit of the pump series production can be taken over. It is only a small drive power required because no pressing operations occur.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Reciprocating Pumps (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • External Artificial Organs (AREA)

Abstract

The device has a rotary piston pump, and an impurity collector that is connected to the pump. A slot housing (21) of the pump is formed permeable to fluid. The slot housing is formed with slots extending over periphery. Rotary pistons (8, 9) are equipped with projections that are formed complementary to the slots in the slot housing. The pistons are connected with each other, and comb with the slots in the slot housing. Suspensions are discharged laterally over the slots from the slot housing.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Abscheiden von störenden Feststoffen (Steine, Eisenteile, Holzstücke, Fasern) aus faserstoffreichen Biosuspensionen für Fütterungsanlagen, für die Fermenterbeschickung von Biogasanlagen und dgl., aufweisend eine Drehkolbenpumpe und einen an die Drehkolbenpumpe angeschlossenen Störstoffsammler.The invention relates to a device for separating off interfering solids (stones, iron parts, pieces of wood, fibers) from fiber-rich biosuspensions for feeding systems, for fermenter feed of biogas plants and the like., Having a rotary lobe pump and connected to the rotary piston impoundment collector.

Eine solche Vorrichtung ist aus der DE 201 18 068 U1 bekannt, die den Oberbegriff von Anspruch 1 offenbart.Such a device is from the DE 201 18 068 U1 known, which discloses the preamble of claim 1.

Bei Mischaufgaben in der Landwirtschaft müssen Trockenstoffe organischen Ursprungs mit Flüssigkeit so aufbereitet werden, dass eine pumpfähige Suspension entsteht.For mixing tasks in agriculture, driers of organic origin must be treated with liquid in such a way that a pumpable suspension is produced.

Beispiele dafür sind Fütterungsanlagen, bei denen die Feststoffe als Nahrungsquelle dienen, oder etwa die Fermenterbeschickung in Biogasanlagen, bei denen durch die Trockenstoffzufuhr die Gasausbeute gesteigert werden kann.Examples of this are feeding systems in which the solids serve as a source of food, or about the fermenter feed in biogas plants, where the dry matter supply, the gas yield can be increased.

Die entstehende Suspension hat einen hohen Trockensubstanz-Gehalt mit dementsprechender schlechter Fließeigenschaft, sodass Kreiselpumpen als Förderorgan nicht eingesetzt werden können. Meist werden darum Verdrängerpumpen (beispielsweise Drehkolbenpumpen) eingesetzt, die mit Zuführschnecken zur Befüllung ausgerüstet sind.The resulting suspension has a high dry matter content with corresponding poor flow properties, so centrifugal pumps as Conveyor can not be used. Usually, therefore, positive displacement pumps (for example rotary lobe pumps) are used, which are equipped with feed screws for filling.

Unter den üblichen Arbeitsbedingungen in landwirtschaftlichen Produktionsbetrieben kann nicht ausgeschlossen werden, dass Störstoffe wie Steine, Betonreste oder Stahlteile in die Verarbeitungskette geraten. Größere Störstoffe, deren Abmessungen den maximal möglichen Kugeldurchmesser des Pumpaggregates überschreiten, können nicht durchgeschleust werden und verursachen Blockaden. Kleinere Störstoffe verursachen Verschleiß an den Bauelementen der Pumpe. Andererseits gibt es auch Anwendungsfälle, in denen Fasern oder zu groß dimensionierte Fasern in Biosuspensionen unerwünschte und störende Feststoffe sind.Under normal working conditions in agricultural production companies, it can not be ruled out that contaminants such as stones, concrete residues or steel parts enter the processing chain. Larger contaminants whose dimensions exceed the maximum possible ball diameter of the pump unit can not be passed through and cause blockages. Smaller contaminants cause wear on the components of the pump. On the other hand, there are also applications in which fibers or oversized fibers in bio-suspensions are undesirable and interfering solids.

Besondere Probleme verursachen scharfkantige Steine, die Abrieb an den Kolbenspitzen verursachen und dadurch die internen Spalte vergrößern. Eine Verminderung des Wirkungsgrades der Pumpe ist die Folge.Special problems cause sharp-edged stones, which cause abrasion at the piston tips and thereby increase the internal gap. A reduction in the efficiency of the pump is the result.

Könnten derartige Fest- oder Störstoffe in dem Mischprozess vermieden werden, würden längere Stillstandszeiten wegen der Entfernung der Störstoffe oder für Verschleißreparaturen vermieden werden, sodass die Akzeptanz und Wirtschaftlichkeit des Mischverfahrens verbessert werden könnte.If such solids could be avoided in the mixing process, longer downtime due to removal of the contaminants or for wear repairs would be avoided so that the acceptance and economics of the mixing process could be improved.

Es wird also nach einem Abscheider gesucht, der in der Lage ist, auch aus einer faserstoffreichen Suspension Störstoffe wie Steine, Eisenteile, Holzstücke, Fasern und dgl. abzuscheiden.It is therefore looking for a separator, which is able, even from a fiber-rich suspension impurities such as stones, iron parts, pieces of wood, fibers and the like. Deposit.

Eine Möglichkeit, die Störstoffe zu entfernen, besteht darin, die Grobstoffe vor dem Mischungsprozess auszusieben. Der dazu erforderliche Aufwand steht jedoch in keinem Verhältnis zum Reparaturaufwand bei möglichen Schäden an der Pumpe.One way to remove the contaminants is to screen out the coarse materials before the mixing process. However, the required effort is out of proportion to the repair effort in case of possible damage to the pump.

Daher wird eine Abscheidung der Störstoffe aus der angemischten Suspension bevorzugt, wobei die Abscheidung auch bei dickflüssigen Suspensionen möglich sein soll.Therefore, a separation of the impurities from the mixed suspension is preferred, the deposition should also be possible with viscous suspensions.

Bekannt sind Fest/Flüssig-Trenngeräte, die auf einer Schnecke und einem Sieb aufgebaut sind. Dabei verdichtet eine Pressschnecke festes und möglichst faserstoffreiches Material zu einem Pfropfen, aus dem die Flüssigkeit herausgepresst wird. Dies ist im Sinne der hier anstehenden Aufgabe kontraproduktiv, da neben den Störstoffen auch die organischen Feststoffe abgeschieden werden, die ja gerade weiter gefördert werden sollen.Solid / liquid separating devices are known, which are constructed on a screw and a sieve. In this process, a press screw compresses solid and, if possible, fiber-rich material into a plug, from which the liquid is pressed out. This is counterproductive in the sense of the task at hand, because in addition to the impurities also the organic solids are deposited, which are just to be promoted further.

Ebenso ungeeignet sind bekannte Zentrifugensysteme wie Dekanter, die ebenfalls alle Feststoffe abscheiden und nicht zwischen störenden Steinen und mehr oder weniger erwünschten Faserstoffen unterscheiden können.Also unsuitable are known centrifuge systems such as decanters, which also deposit all solids and can not distinguish between troublesome stones and more or less desirable fibers.

Bekannt sind weiterhin Hydrozyklone, die mittels beschleunigter Strömung des Mediums und spiralförmiger Umlenkung in einen kegelförmigen Behälter die schweren Feststoffe von der Flüssigkeit trennen. Dieses Prinzip ist jedoch bei hochviskosen Flüssigkeiten ungeeignet.Also known are hydrocyclones which separate the heavy solids from the liquid by means of accelerated flow of the medium and spiral deflection into a conical container. However, this principle is unsuitable for highly viscous liquids.

Weiterhin sind Schneidwerke mit integriertem Fremdkörperabscheider bekannt. Hier werden die groben Partikel ausgesiebt, wobei jedoch ein ständiges exaktes Schneiden erforderlich ist, um das Sieb freizuhalten. Schneidvorgänge in derartigen Medien ist jedoch sehr verschleiß- und somit kostenträchtig. Zudem können die Fremdkörper bei diesem System beliebig oft zur Schneideinrichtung gelangen und so besonders verschleißend wirken.Furthermore, cutting units with integrated Fremdkörperabscheider are known. Here, the coarse particles are screened, but a constant precise cutting is required to keep the screen free. However, cutting operations in such media is very wear and thus costly. In addition, the foreign body can reach the cutting device as often as desired in this system and thus act particularly wear.

Zur Lösung der hier gestellten Aufgabe wird eine modifizierte Drehkolbenpumpe vorgeschlagen, deren Gehäusewand flüssigkeitsdurchlässig ausgestaltet ist. Die Durchlässigkeit wird beispielsweise dadurch erreicht, dass die Gehäusewand mit schlitzförmigen Spalten ausgestaltet ist, die sich in Umfangsrichtung erstrecken. Nach einer weiteren vorteilhaften Ausbildung sind die Drehkolben mit Vorsprüngen ausgestattet, die zu den Schlitzen in der Gehäusewand komplementär ausgebildet sind, und dass die Drehkolben miteinander und mit den Schlitzen in der Gehäusewand kämmen.To solve the problem posed here, a modified rotary lobe pump is proposed, the housing wall of which is designed to be permeable to liquid. The permeability is achieved, for example, in that the housing wall is designed with slot-shaped gaps which extend in the circumferential direction. According to a further advantageous embodiment, the rotary pistons are provided with projections which correspond to the slots in the Housing wall are formed complementary, and that the rotary pistons mesh with each other and with the slots in the housing wall.

Die Erfindung wird nachstehend anhand der Zeichnungen beispielsweise erläutert.

  • Fig. 1 zeigt eine schematische Darstellung der Vorderansicht einer Vorrichtung gemäß der Erfindung
  • Fig. 2 zeigt eine Schnittansicht der in Fig. 1 gezeigten Vorrichtung in vergrößerter Darstellung
  • Fig. 3a zeigt eine seitliche Ansicht der Drehkolbenpumpe der in Fig. 1 gezeigten Vorrichtung in vergrößerter Darstellung
  • Fig. 3b zeigt eine Abschnittsvergrößerung eines Teils der in Fig. 3a gezeigten Drehkolbenpumpe.
The invention will be explained below with reference to the drawings, for example.
  • Fig. 1 shows a schematic representation of the front view of a device according to the invention
  • Fig. 2 shows a sectional view of the in Fig. 1 shown device in an enlarged view
  • Fig. 3a shows a side view of the rotary piston pump in Fig. 1 shown device in an enlarged view
  • Fig. 3b shows a section enlargement of a part of FIG Fig. 3a shown rotary lobe pump.

In den Figuren ist mit 9 eine Drehkolbenpumpe bezeichnet, und zwar in der Art, wie derartige Drehkolbenpumpen bekannt sind. Jedoch ist bei der Vorrichtung gemäß der vorliegenden Erfindung das Gehäuse modifiziert worden und hierauf wird weiter später noch eingegangen.In the figures, 9 denotes a rotary piston pump, in the manner in which such rotary piston pumps are known. However, in the apparatus according to the present invention, the housing has been modified and will be discussed later.

Mit 10 ist die Zufuhr für eine Suspension bezeichnet. Die rotierenden Drehkolben 8 und 9 stellen sicher, dass die Suspension seitlich über Schlitze aus dem Schlitzgehäuse 21 austreten kann und zwar wie dies durch die Bezugszahl 11 angedeutet ist. Die Suspension kann über eine Pumpe 13 zur weiteren Verarbeitung über eine Leitung 14 abgeführt werden.10, the supply is called a suspension. The rotating rotary pistons 8 and 9 ensure that the suspension can emerge laterally from the slot housing 21 via slots, as indicated by reference numeral 11. The suspension can be removed via a pump 13 for further processing via a line 14.

Wesentlich im Zusammenhang mit der vorliegenden Erfindung ist jedoch, dass der Zufuhr 10 für die Suspension gegenüberliegend ein Sammler 15 vorgesehen ist, in dem alle die Stoffe aufgefangen werden können, die nicht durch die Schlitze hindurch gelangen können. Das Gehäuse 15 ist mit einer seitlichen Revisionsöffnung 12 versehen, um die sich im Laufe der Zeit ansammelnden störenden Feststoffe entnehmen zu können.However, it is essential in the context of the present invention that the supply 10 for the suspension opposite a collector 15 is provided in which all the substances can be collected that can not pass through the slots. The housing 15 is provided with a provided lateral access opening 12 to remove the accumulating over time interfering solids can.

Fig. 2 zeigt das Schlitzgehäuse 21 sowie Abstützteile 23, die dafür sorgen, dass das Gehäuse zusammen hält. Fig. 2 shows the slot housing 21 and support members 23, which ensure that the housing holds together.

Fig. 3a zeigt das Äußere der Drehkolbenpumpe 9 in der Vorrichtung gemäß der Erfindung. Man erkennt das Schlitzgehäuse 21 und die Abstützungen 23. Fig. 3a shows the exterior of the rotary pump 9 in the device according to the invention. It can be seen the slot housing 21 and the supports 23rd

Die Fig. 3b stellt eine Ausschnittsvergrößerung eines Teils der in Fig. 3a gezeigten Drehkolbenpumpe. Jedoch handelt es sich hierbei um eine schematische Darstellung, weil nämlich die einzelnen Spalten oder Schlitze mit unterschiedlichen Größen wiedergegeben ist, um zu verdeutlichen, dass ein Gehäuse, beispielsweise mit einer Spaltbreite von s1 und eine andere Drehkolbenpumpe mit Spalten s2 ausgestattet sein können. Wenn nämlich Störstoffe abgeschieden werden sollen, wie Steine, Holzstücke, Eisenteile und dgl., würde s1 in der Größenordnung von 1 mm bis 20mm liegen. Sollen hingegen Faserstoffe aus einer Suspension abgeschieden werden, so hat s2 einen Bereich von 0,1mm bis 1 mm. Es kommt also auf die Dimensionierung der Spalte an, wenn es darum geht, ob nun Störstoffe aus einer Suspension beseitigt werden sollen oder ob nur Fasern einer bestimmten Größe aus einer Suspension herausgebracht werden sollen.The Fig. 3b represents a partial enlargement of part of the in Fig. 3a shown rotary lobe pump. However, this is a schematic representation, namely, because the individual columns or slots are represented with different sizes in order to make it clear that a housing, for example, with a gap width of s1 and another rotary pump can be equipped with columns s2. Namely, if impurities are to be deposited, such as stones, pieces of wood, iron parts and the like., S1 would be on the order of 1 mm to 20 mm. If, on the other hand, fibers are to be separated from a suspension, then s2 has a range of 0.1 mm to 1 mm. It depends on the dimensioning of the column, when it comes to whether contaminants should be removed from a suspension or whether only fibers of a certain size should be brought out of a suspension.

Bei den in den Fig. 3a und 3b gezeigten Ausführungsformen haben die Schlitze oder Spalten eine in Umfangsrichtung gehende Ausrichtung. Denkbar sind für die Zwecke der vorliegenden Erfindung auch andere Ausgestaltungen der Flüssigkeitsdurchlässigkeit der Gehäusewand 21 der Drehkolbenpumpe 9.In the in the Fig. 3a and 3b In embodiments shown, the slots or gaps have a circumferential orientation. Also conceivable for the purposes of the present invention, other embodiments of the liquid permeability of the housing wall 21 of the rotary piston pump. 9

Wird die Suspension der Vorrichtung gemäß der Erfindung von unten her zugeführt, verlassen die Störstoffe den Abscheider nach oben. Es bildet sich zunächst ein mit Flüssigkeit umschlossener Fremdkörperpfropfen, aus dem die Flüssigkeit durch die Gehäusespalte abfließen kann. Die Länge der Druckleitung bestimmt den Anteil der Restfeuchte im abgeschiedenen Feststoff.If the suspension of the device according to the invention fed from below, the impurities leave the separator upwards. It forms first a liquid-enclosed foreign body plug, from which the liquid can flow through the housing column. The length of the Pressure line determines the proportion of residual moisture in the separated solid.

In diesem Fall ist es vorteilhaft, die Drehkolben aus einem harten Material zu fertigen, das gegenüber den abzuscheidenden Fremdkörpern einen niedrigen Reibungskoeffizient besitzt, damit die Fremdkörper leicht weitergefördert werden können.In this case, it is advantageous to manufacture the rotary pistons from a hard material which has a low coefficient of friction with respect to the foreign bodies to be deposited, so that the foreign bodies can be easily conveyed further.

Als weitere Modifikation besteht die Möglichkeit, auch die Drehkolben geschlitzt auszuführen und zwar derart, dass die vorspringenden Bereiche des einen Drehkolbens in die Lücken des anderen Drehkolbens eintauchen und kämmen. Auch werden die Gehäuseschlitze durch eine Gehäusewand mit schlitzförmigen Spalten ersetzt, die sich in Umfangsrichtung erstrecken.As a further modification, it is also possible to slit the rotary pistons in such a way that the protruding areas of one rotary piston dive into the gaps of the other rotary piston and mesh. Also, the housing slots are replaced by a housing wall with slit-shaped columns extending in the circumferential direction.

Wird eine mit Störstoffen beladene Suspension von oben der Vorrichtung gemäß der Erfindung zugeführt, können Flüssigkeit und alle Feststoffe, deren Abmessungen das Spaltmaß des Gehäuses unterschreiten, ungehindert der Pumpe 13 zufließen und zur weiteren Verarbeitung gepumpt werden. Dabei wird zunächst auch der Sammler 15 mit Suspension gefüllt.If a loaded with impurities suspension from the top of the device according to the invention, liquid and all solids whose dimensions fall below the gap of the housing, unhindered flow to the pump 13 and be pumped for further processing. First, the collector 15 is filled with suspension.

Größere Feststoffe verbleiben in den sich zwischen den Drehkolben 8 und 9 und den Spaltgehäuse 21 öffnenden Kammern und werden bei Drehung der Kolben in den Sammler 15 gefördert. Dort verdrängen diese die vorhandene Suspension solange, bis der Sammler 15 komplett mit Störstoffen gefüllt ist. Eine geeignete Anzeigevorrichtung signalisiert diesen Zustand. Der Behälter muss dann entleert werden.Larger solids remain in the chambers opening between the rotary pistons 8 and 9 and the gap housing 21 and are conveyed into the collector 15 upon rotation of the pistons. There they displace the existing suspension until the collector 15 is completely filled with contaminants. A suitable display device signals this state. The container must then be emptied.

Die Drehkolben 8 und 9 können mit einer dicken Gummischicht versehen werden, damit eine gewisse Nachgiebigkeit bei Quetschsituationen vorhanden ist.The rotary pistons 8 and 9 can be provided with a thick rubber layer, so that a certain flexibility in crushing situations is present.

Dadurch, dass die erforderliche Drehzahl wegen des verhältnismäßig geringen Feststoffanfalls nur sehr klein ist, ist in allen Abscheider-Modifikationen auch bei scharfkantigen Störstoffen eine lediglich geringe Abrasionsbelastung der Förderelemente zu erwarten.The fact that the required speed is only very small because of the relatively small amount of solid material is in all separator modifications Even with sharp-edged contaminants to expect a low abrasion load of the conveyor elements.

Die Breite der Gehäuseschlitze bestimmt die minimale Größe der abscheidbaren Fremdstoffe. Durch die Wahl der Schlitzbreite kann die Größe der abzuscheidenden Störstoffe festgelegt werden. Es handelt sich um eine kostengünstige Konstruktion, da die Antriebseinheit der Pumpenserienfertigung übernommen werden kann. Es ist nur eine geringe Antriebsleistung erforderlich, da keine Pressvorgänge auftreten.The width of the housing slots determines the minimum size of the depositable foreign matter. By choosing the slot width, the size of the deposited impurities can be determined. It is a cost-effective construction, since the drive unit of the pump series production can be taken over. It is only a small drive power required because no pressing operations occur.

Claims (3)

  1. Device for separating interfering solid matter (stones, parts of iron, pieces of wood, fibres) from biosuspensions rich in fibrous matter for feeding installations or for charging the fermenter of biogas installations, comprising a rotary piston pump (9) and an impurity collector (15) connected to the rotary piston pump, characterized in that the housing wall (21) of the rotary piston pump (9) is of a liquid-permeable form.
  2. Device according to Claim 1, characterized in that the housing wall (21) is formed with slots or gaps (sl; s2) extending in a distributed manner over the circumference.
  3. Device according to Claim 2, characterized in that the rotary pistons (8, 9) are provided with projections, which are formed so as to complement the slots in the housing wall (21), and in that the rotary pistons mesh with one another and with the slots in the housing wall.
EP08013242A 2007-08-06 2008-07-23 Device for separating interfering solid matter from biosuspensions Not-in-force EP2025938B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08013242T PL2025938T3 (en) 2007-08-06 2008-07-23 Device for separating interfering solid matter from biosuspensions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007036899 2007-08-06

Publications (3)

Publication Number Publication Date
EP2025938A2 EP2025938A2 (en) 2009-02-18
EP2025938A3 EP2025938A3 (en) 2010-10-20
EP2025938B1 true EP2025938B1 (en) 2011-12-14

Family

ID=40011329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08013242A Not-in-force EP2025938B1 (en) 2007-08-06 2008-07-23 Device for separating interfering solid matter from biosuspensions

Country Status (5)

Country Link
EP (1) EP2025938B1 (en)
AT (1) ATE537364T1 (en)
DK (1) DK2025938T3 (en)
ES (1) ES2377952T3 (en)
PL (1) PL2025938T3 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20118068U1 (en) * 2001-11-08 2002-01-24 Börger GmbH, 46325 Borken Device for processing liquids, in particular with solids contained therein, or of flowable or pourable, crushable solids

Also Published As

Publication number Publication date
ES2377952T3 (en) 2012-04-03
PL2025938T3 (en) 2012-05-31
EP2025938A3 (en) 2010-10-20
ATE537364T1 (en) 2011-12-15
EP2025938A2 (en) 2009-02-18
DK2025938T3 (en) 2012-01-30

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