EP0177838A2 - Device for introducing flocculants into sludge inside the loading chamber of a centrifuge - Google Patents

Device for introducing flocculants into sludge inside the loading chamber of a centrifuge Download PDF

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Publication number
EP0177838A2
EP0177838A2 EP85112142A EP85112142A EP0177838A2 EP 0177838 A2 EP0177838 A2 EP 0177838A2 EP 85112142 A EP85112142 A EP 85112142A EP 85112142 A EP85112142 A EP 85112142A EP 0177838 A2 EP0177838 A2 EP 0177838A2
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EP
European Patent Office
Prior art keywords
sludge
flocculant
inlet chamber
centrifuge
feed tube
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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.)
Granted
Application number
EP85112142A
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German (de)
French (fr)
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EP0177838B1 (en
EP0177838A3 (en
Inventor
Stephan Cläsgens
Heinz Kulle
Reinhold Dr. Schilp
Wolfgang Epper
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Publication of EP0177838A3 publication Critical patent/EP0177838A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor

Definitions

  • the invention relates to a device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, consisting of a flocculant feed pipe which is passed through the sludge feed pipe and projects into the inlet chamber of the centrifuge provided with sludge through openings.
  • the object of the invention is therefore to provide a device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, which enables the flocculant to be optimally mixed with the sludge while using as little flocculant as possible.
  • the object is achieved in that the flocculant supply pipe is axially adjustable and / or rotatably held in the sludge supply pipe.
  • the flocculant jet emerging from the nozzle-shaped outlet opening of the flocculant supply pipe can be directed or adjusted precisely to the sludge flow located in the peripheral area of the inlet chamber , in which an optimal mixing of sludge and flocculant takes place. As practical tests have shown, this area lies between the baffle of the inlet chamber and the sludge through openings in the Inlet chamber, where the sludge flow runs in the axial direction.
  • the flocculant addition can be reduced to the minimum required in each case, which in comparison to the previously known flocculant supply devices saves flocculants in some cases up to over 50 % is achieved.
  • the flocculant feed tube consists of several parts which are arranged to be pluggable or telescopically displaceable.
  • the flocculant feed tube consists of a flexible or elastic material, in particular rubber.
  • a flocculant feed pipe is particularly characterized by the easy handling during installation and removal and by the self-sealing at the through opening in the sludge feed pipe.
  • the centrifuge consists of a centrifuge drum 1, in which a screw conveyor 2 is arranged coaxially, the shaft of which is designed as a hollow shaft 3 and is externally surrounded by the spiral screw 4.
  • the hollow shaft 3 is closed by an end wall 5, which is provided in the central area with an opening 6 through which a stationary arranged sludge feed pipe 7 is passed.
  • a baffle 8 with baffle cone 9 is installed in the hollow shaft 3 at a distance from the end wall 5, which together with the end wall 5 and the hollow shaft 3 forms an inlet chamber 10 for the sludge.
  • Provided in the hollow shaft 3 in the area of this inlet chamber 10 are a plurality of openings 11 evenly distributed over the circumference for the sludge to pass into the centrifuge drum 1.
  • a flocculant feed pipe 12 is guided through the sludge feed pipe 7, which opens into the inlet chamber 10 and is provided in the end region with a nozzle-shaped outlet opening 13.
  • This Flocculant feed pipe 12 is held in the sludge feed pipe 7 according to the invention both axially adjustable and rotatable.
  • a tubular extension piece 14 with a locking screw 15 arranged at the outer end of the sludge feed pipe 7 serves as a holder. By loosening the adjusting screw 15, the flocculant feed pipe 12 can be moved both in the axial direction and rotated about the axis.
  • the flocculant supply pipe 12 with the nozzle-shaped outlet opening 13 can be adjusted very advantageously in such a way that the flocculant jet 16 emerging from the nozzle-shaped outlet opening 13 under pressure strikes the rotating sludge layer located in the peripheral area within the sludge inlet chamber 10 and at least partially penetrates, with an intimate mixing of sludge and flocculant.
  • this area lies between the baffle 8 and the sludge passage openings 11, specifically at the point where the sludge in the peripheral region of the inlet chamber 10 is away from the baffle wall 8, approximately in the axial direction towards the sludge passage openings 11 emotional.
  • the amount of flocculant supplied to the sludge in the inlet chamber 10 under pressure of, for example, about 0.5 to 10 bar via the line 12 can be optimally adjusted in this way, that is to say can be adjusted to the amount of flocculant that is necessary to all in the Detect and flocculate existing solid particles. In this way, the flocculant consumption can be reduced considerably in comparison to the previously known devices and the separation effect can be significantly improved.
  • the flocculant supply pipe 12 can consist of several parts 17 which are arranged to be pluggable or telescopically displaceable.
  • the flocculant feed pipe 12 can also be attached in the sludge feed pipe 7 centrally, laterally at the top in the axial direction, or also at an angle to it.
  • the flocculant feed pipe 12 can optionally also be introduced into the inlet chamber 10 outside the sludge feed pipe 12.
  • the flocculant supply pipe 12 according to the invention can also be very advantageously provided with a plurality of nozzle-shaped outlet openings.

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Abstract

1. Device for introducing flocculants into the sludge inside the inlet chamber (10) of a centrifuge, consisting of a flocculant feed tube (12) which is passed through the sludge feed tube (7) and projects into the inlet chamber (10) of the centrifuge, said inlet chamber being provided with sludge passage openings (11) in which there is disposed in the inlet chamber (10) at a distance from the mouth of the sludge feed tube (7) a baffle plate (8) running at right angles to the mouth of the sludge feed tube (7), characterised in that the baffle plate (8) is provided with a baffle cone (9) directed centrally towards the mouth of the sludge feed tube (7), and that the flocculant feed tube (12) is held axially displaceable and/or rotatable in the sludge feed tube (7) so that its outlet opening (13) is directed towards the region between the baffle plate (8) and the sludge passage openings (11) disposed at a distance therefrom in the inlet chamber (10).

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Einbringen von Flockungsmitteln in den Schlamm innerhalb der Einlaufkammer einer Zentrifuge, bestehend aus einem Flockungsmittel-Zuführungsrohr, das durch das Schlamm-Zuführungsrohr hindurchgeführt ist und in die mit Schlamm-Durchtrittsöffnungen versehene Einlaufkammer der Zentrifuge hineinragt.The invention relates to a device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, consisting of a flocculant feed pipe which is passed through the sludge feed pipe and projects into the inlet chamber of the centrifuge provided with sludge through openings.

Aus der deutschen Offenlegungsschrift 28 22 533 ist eine Vollmanteldekantier-Zentrifuge bekannt, bei der das Flockungsmittel über eine stationär angeordnete Leitung, die durch das Schlamm-Zuführungsrohr hindurchgeführt ist, in die Einlaufkammer der Zentrifuge drucklos zugeführt wird. Die Vermischung des Flokkungsmittels mit dem Schlamm erfolgt hierbei allein durch die in der Einlaufkammer herrschenden Strömungsturbulenzen. Eine ausreichende Vermischung des Flokkungsmittels mit dem Schlamm ist jedoch hierbei nicht einmal dann zu erreichen, wenn dem Schlamm mehr Flokkungsmittel zugegeben werden, als für die Ausflockung der im Schlamm vorhandenen Feststoffpartikeln erforderlich ist. Eine Überdosierung des Schlammes mit Flockungsmitteln ist jedoch mit erhöhten Kosten verbunden und daher unwirtschaftlich. Andererseits werden bei dieser bekannten Art der Flockungsmittelzufuhr in den Schlamm nicht alle im Schlamm befindlichen Feststoffpartikel von den Flockungsmitteln erreicht, was sich wiederum nachteilig auf die Trennung der Feststoffe von der Flüssigkeit in der Zentrifuge auswirkt.From German Offenlegungsschrift 28 22 533, a full jacket decanter centrifuge is known in which the flocculant is fed into the inlet chamber of the centrifuge without pressure via a stationary line which is passed through the sludge feed pipe. The flocculant is mixed with the sludge here solely by the flow turbulence prevailing in the inlet chamber. Adequate mixing of the flocculant with the sludge is not hereby, however to be achieved once more flocculants are added to the sludge than is necessary for the flocculation of the solid particles present in the sludge. Overdosing the sludge with flocculants is associated with increased costs and is therefore uneconomical. On the other hand, with this known type of flocculant supply into the sludge, not all of the solid particles in the sludge are reached by the flocculants, which in turn has a disadvantageous effect on the separation of the solids from the liquid in the centrifuge.

Die Aufgabe der Erfindung besteht daher darin, eine Vorrichtung zum Einbringen von Flockungsmitteln in den Schlamm innerhalb der Einlaufkammer einer Zentrifuge zu schaffen, die bei geringstmöglichem Flockungsmittel-Verbrauch eine optimale Vermischung des Flockungsmittels mit dem Schlamm ermöglicht.The object of the invention is therefore to provide a device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, which enables the flocculant to be optimally mixed with the sludge while using as little flocculant as possible.

Die Aufgabe wird dadurch gelöst, daß das Flockungsmittel-Zuführungsrohr im Schlammzuführungsrohr axial verstellbar und/oder drehbeweglich gehalten ist.The object is achieved in that the flocculant supply pipe is axially adjustable and / or rotatably held in the sludge supply pipe.

Dadurch, daß gemäß der Erfindung das Flockungsmittel-Zuführungsrohr im Schlamm-Zuführungsrohr axial verstellbar und/ oder drehbewegliche gehalten ist, kann sehr vorteilhaft der aus der düsenförmigen Austrittsöffnung des FlockungsmittelZuführungsrohres austretende Flockungsmittelstrahl genau auf den im peripheren Bereich der Einlaufkammer befindlichen Schlammfluß gerichtet bzw. eingestellt werden, in dem eine optimale Vermischung von Schlamm und Flockungsmittel erfolgt. Dieser Bereich liegt, wie inzwischen praktische Versuche gezeigt haben, zwischen der Prallwand der Einlaufkammer und den Schlamm-Durchtrittsöffnungen in der Einlaufkammer, und zwar dort, wo die Schlammströmung in Achsrichtung verläuft. Durch entsprechende Einstellung des Flockungsmittel-Zuführungsrohres gemäß der Erfindung kann, wie die Praxis ferner gezeigt hat, die Flockungsmittelzugabe auf die jeweils erforderliche Mindestmenge reduziert werden, wodurch im Vergleich zu den bisher bekannten Flockungsmittel-Zuführungsvorrichtungen eine Einsparung an Flockungsmitteln in manchen Fällen bis zu über 50 % erzielt wird.Due to the fact that according to the invention the flocculant supply pipe is held axially adjustable and / or rotatable in the sludge supply pipe, the flocculant jet emerging from the nozzle-shaped outlet opening of the flocculant supply pipe can be directed or adjusted precisely to the sludge flow located in the peripheral area of the inlet chamber , in which an optimal mixing of sludge and flocculant takes place. As practical tests have shown, this area lies between the baffle of the inlet chamber and the sludge through openings in the Inlet chamber, where the sludge flow runs in the axial direction. By appropriate adjustment of the flocculant supply pipe according to the invention, as practice has further shown, the flocculant addition can be reduced to the minimum required in each case, which in comparison to the previously known flocculant supply devices saves flocculants in some cases up to over 50 % is achieved.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung besteht das Flockungsmittel-Zuführungsrohr aus mehreren Teilen, die zusammensteckbar oder teleskopartig ineinander verschiebbar angeordnet sind. Durch diese Ausgestaltung des Flockungsmittel-Zuführungsrohres kann der Aus- und Einbau des Flockungsmittel-Zuführungsrohres bei geringem Platzbedarf in einfacher Weise vorgenommen werden.According to a further advantageous embodiment of the invention, the flocculant feed tube consists of several parts which are arranged to be pluggable or telescopically displaceable. With this configuration of the flocculant supply pipe, the removal and installation of the flocculant supply pipe can be carried out in a simple manner with a small space requirement.

In weiterer Ausgestaltung der Erfindung besteht das Flockungsmittel-Zuführungsrohr aus einem flexiblen oder elastischem Werkstoff, insbesondere aus Gummi. Ein derartiges Flockungsmittel-Zuführungsrohr zeichnet sich besonders durch die leichte Handhabung beim Ein-und Ausbau sowie durch die Selbstabdichtung an der Durchführungsöffnung im Schlammzuführungsrohr aus.In a further embodiment of the invention, the flocculant feed tube consists of a flexible or elastic material, in particular rubber. Such a flocculant feed pipe is particularly characterized by the easy handling during installation and removal and by the self-sealing at the through opening in the sludge feed pipe.

Die Vorrichtung gemäß der Erfindung wird nachfolgend anhand von in der Zeichnung schematisch dargestellten Ausführungsbeispielen näher erläutert.

  • Fig. 1 einen Teilausschnitt einer Vollmantel-Schnekkenzentrifuge mit Einlaufkammer und Flockungsmittel- Zuführungsrohr gemäß der Erfindung;
  • Fig. 2 einen Teilausschnitt einer am Schlammzuführungsrohr angeordneten Halterung für das Flockungsmittel-Zuführungsrohr gemäß der Erfindung in vergrößertem Maßstab.
  • Fig. 3 einen Teilausschnitt eines aus mehreren Teilen bestehenden Flockungsmittel- Zuführungsrohres gemäß der Erfindung,
The device according to the invention is explained in more detail below on the basis of exemplary embodiments shown schematically in the drawing.
  • Figure 1 is a partial section of a solid-bowl screw centrifuge with inlet chamber and flocculant supply pipe according to the invention.
  • Fig. 2 shows a partial section of a holder arranged on the sludge feed pipe for the flocculant feed pipe according to the invention on an enlarged scale.
  • 3 is a partial section of a multi-part flocculant supply pipe according to the invention;

Wie Fig. 1 zeigt, besteht die Zentrifuge aus einer Zentrifugentrommel 1, in der koaxial eine Förderschnecke 2 angeordnet ist, deren Welle als Hohlwelle 3 ausgebildet und außen von der Schneckelwendel 4 umgeben ist. Die Hohlwelle 3 ist durch eine Stirnwand 5 abgeschlossen, die im zentralen Bereich mit einer Öffnung 6 versehen ist, durch die ein stationär angeordnetes Schlammzuführungsrohr 7 hindurchgeführt ist. In der Hohlwelle 3 ist mit Abstand von der Stirnwandung 5 eine Prallwand 8 mit Prallkegel 9 eingebaut, die zusammen mit der Stirnwand 5 und der Hohlwelle 3 eine Einlaufkammer 10 für den Schlamm bildet. In der Hohlwelle 3 sind im Bereich dieser Einlaufkammer 10 mehrere über den Umfang gleichmäßig verteilte Öffnungen 11 für den Schlammdurchtritt in die Zentrifugentrommel 1 vorgesehen.As shown in FIG. 1, the centrifuge consists of a centrifuge drum 1, in which a screw conveyor 2 is arranged coaxially, the shaft of which is designed as a hollow shaft 3 and is externally surrounded by the spiral screw 4. The hollow shaft 3 is closed by an end wall 5, which is provided in the central area with an opening 6 through which a stationary arranged sludge feed pipe 7 is passed. A baffle 8 with baffle cone 9 is installed in the hollow shaft 3 at a distance from the end wall 5, which together with the end wall 5 and the hollow shaft 3 forms an inlet chamber 10 for the sludge. Provided in the hollow shaft 3 in the area of this inlet chamber 10 are a plurality of openings 11 evenly distributed over the circumference for the sludge to pass into the centrifuge drum 1.

Durch das Schlammzuführungsrohr 7, das in die Einlaufkammer 10 mündet, ist ein Flockungsmittel-Zuführungsrohr 12 hindurchgeführt, das im Endbereich mit einer düsenförmigen Austrittsöffnung 13 versehen ist. Dieses Flockungsmittel-Zuführungsrohr 12 ist im Schlammzuführungsrohr 7 gemäß der Erfindung sowohl axial verstellbar als auch drehbeweglich gehalten. Als Halterung dient hierzu ein am äußeren Ende des Schlammzuführungsrohres 7 angeordnetes rohrförmiges Verlängerungsstück 14 mit Feststellschraube 15. Durch Lockern der Stellschraube 15 kann das Flockungsmittel-Zuführungsrohr 12 sowohl in axialer Richtung verschoben als auch um die Achse verdreht werden. Auf diese Weise kann sehr vorteilhaft das Flockungsmittel-Zuführungsrohr 12 mit der düsenförmigen Austrittsöffnung 13 jeweils so verstellt werden, daß der aus der düsenförmigen Austrittsöffnung 13 unter Druck austretende Flockungsmittelstrahl 16 auf die im peripheren Bereich innerhalb der Schlammeinlaufkammer 10 befindliche rotierende Schlammschicht auftrifft und diese mindestens teilweise durchdringt, wobei eine innige Vermischung von Schlamm und Flockungsmittel erfolgt. Dieser Bereich liegt, wie durch praktische Versuche ermittelt wurde, zwischen der Prallwand 8 und den Schlammdurchtrittsöffnungen 11, und zwar an der Stelle, wo sich der Schlamm im peripheren Bereich der Einlaufkammer 10 von der Prallwand 8 weg, etwa in Achsrichtung zu den Schlammdurchtrittsöffnungen 11 hin bewegt. Die unter Druck von beispielsweise unter etwa 0,5 bis 10 bar über die Leitung 12 dem Schlamm in der Einlaufkammer 10 zugeführte Menge an Flockungsmitteln, kann auf diese Weise optimal eingestellt werden, d.h. auf die Flockungsmittelmenge eingestellt werden, die nötig ist, um alle im Schlamm vorhandenen Feststoffpartikeln zu erfassen und auszuflocken. Der Flockungsmittelverbrauch kann auf diese Weise im Vergleich zu den bisher bekannten Vorrichtungen ganz erheblich reduziert und der Trenneffekt wesentlich verbessert werden. Um den Aus- und Einbau des Flockungsmittel-Zuführungsrohres 12 in einfacher und besonders platzsparender Weise zu ermöglichen, kann, wie Fig. 2 zeigt, das Flockungsmittel-Zuführungsrohr 12 aus mehreren Teilen 17 bestehen, die zusammensteckbar oder teleskopartig ineinander verschiebbar angeordnet sind.A flocculant feed pipe 12 is guided through the sludge feed pipe 7, which opens into the inlet chamber 10 and is provided in the end region with a nozzle-shaped outlet opening 13. This Flocculant feed pipe 12 is held in the sludge feed pipe 7 according to the invention both axially adjustable and rotatable. A tubular extension piece 14 with a locking screw 15 arranged at the outer end of the sludge feed pipe 7 serves as a holder. By loosening the adjusting screw 15, the flocculant feed pipe 12 can be moved both in the axial direction and rotated about the axis. In this way, the flocculant supply pipe 12 with the nozzle-shaped outlet opening 13 can be adjusted very advantageously in such a way that the flocculant jet 16 emerging from the nozzle-shaped outlet opening 13 under pressure strikes the rotating sludge layer located in the peripheral area within the sludge inlet chamber 10 and at least partially penetrates, with an intimate mixing of sludge and flocculant. As has been determined by practical tests, this area lies between the baffle 8 and the sludge passage openings 11, specifically at the point where the sludge in the peripheral region of the inlet chamber 10 is away from the baffle wall 8, approximately in the axial direction towards the sludge passage openings 11 emotional. The amount of flocculant supplied to the sludge in the inlet chamber 10 under pressure of, for example, about 0.5 to 10 bar via the line 12 can be optimally adjusted in this way, that is to say can be adjusted to the amount of flocculant that is necessary to all in the Detect and flocculate existing solid particles. In this way, the flocculant consumption can be reduced considerably in comparison to the previously known devices and the separation effect can be significantly improved. In order to enable the removal and installation of the flocculant supply pipe 12 in a simple and particularly space-saving manner, as shown in FIG. 2, the flocculant supply pipe 12 can consist of several parts 17 which are arranged to be pluggable or telescopically displaceable.

Ferner kann das Flockungsmittel-Zuführungsrohr 12, wie beispielsweise die Fig. 3 zeigt, auch aus einem flexiblen oder einem elastischen Werkstoff, insbesondere aus Gummi, bestehen und durch eine entsprechende Öffnung 18 in einem am Schlammzuführungsrohr 7 angeordneten Verlängerungsstück 19 hindurchgeführt sein, wobei aufgrund der Elastizität des unter Druck stehenden Flockungsmittel-Zuführungsrohres 12 ein dichtes Anliegen und damit Festklemmen in der Öffnung 18 des Verlängerungsstückes in einfacher Weise erreicht wird. Eine besondere Feststellschraube ist bei dieser Ausbildung und konstruktiven Anordnung des Flockungsmittel-Zuführungsrohres 12 nicht erforderlich.3, can also consist of a flexible or an elastic material, in particular rubber, and can be passed through a corresponding opening 18 in an extension piece 19 arranged on the sludge feed pipe 7, whereby due to the Elasticity of the pressurized flocculant supply pipe 12, a tight fit and thus clamping in the opening 18 of the extension piece is achieved in a simple manner. A special locking screw is not required with this design and structural arrangement of the flocculant supply tube 12.

Der Gegenstand der Erfindung ist nicht auf die in der Zeichnung dargestellten Ausführungsbeispiele beschränkt. So kann das Flockungsmittel-Zuführungsrohr 12 im Schlammzuführungsrohr 7 auch mittig, seitlich oben in Achsrichtung verlaufend, oder auch schräg dazu verlaufend angebracht sein. Auch kann das Flockungsmittel-Zuführungsrohr 12 gegebenenfalls außerhalb des Schlammzuführungsrohres 12 in die Einlaufkammer 10 eingeführt werden. Ferner kann das Flockungsmittel-Zuführungsrohr 12 gemäß der Erfindung auch sehr vorteilhaft mit mehreren düsenförmigen Austrittsöffnungen versehen werden.The object of the invention is not limited to the exemplary embodiments shown in the drawing. For example, the flocculant feed pipe 12 can also be attached in the sludge feed pipe 7 centrally, laterally at the top in the axial direction, or also at an angle to it. The flocculant feed pipe 12 can optionally also be introduced into the inlet chamber 10 outside the sludge feed pipe 12. Furthermore, the flocculant supply pipe 12 according to the invention can also be very advantageously provided with a plurality of nozzle-shaped outlet openings.

Claims (4)

1. Vorrichtung zum Einbringen von Flockungsmitteln in den Schlamm innerhalb der Einlaufkammer einer Zentrifuge, bestehend aus einem Flockungsmittel-Zuführungsrohr, das durch das Schlammzuführungsrohr hindurchgeführt ist und in die mit Schlamm-Durchtrittsöffnungen versehene Einlaufkammer der Zentrifuge hineinragt, dadurch gekennzeichnet, daß das Flockungsmittel-Zuführungsrohr (12) im Schlamm-Zuführungsrohr (7) axial verstellbar und/oder drehbeweglich gehalten ist.1. Device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, consisting of a flocculant feed pipe which is passed through the sludge feed pipe and protrudes into the inlet chamber of the centrifuge provided with sludge through openings, characterized in that the flocculant feed pipe (12) in the sludge feed pipe (7) is axially adjustable and / or rotatably held. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Flockungsmittel-Zuführungsrohr (12) aus mehreren Teilen (17) besteht, die zusammensteckbar oder teleskopartig ineinander verschiebbar angeordnet sind.2. Apparatus according to claim 1, characterized in that the flocculant supply tube (12) consists of several parts (17) which are arranged to be plugged together or telescopically displaceable. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Flockungsmittel-Zuführungsrohr (12) aus einem flexiblen oder elastischen Werkstoff, insbesondere aus Gummi, besteht.3. Apparatus according to claim 1 or 2, characterized in that the flocculant supply tube (12) consists of a flexible or elastic material, in particular rubber. 4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Flockungsmittel-Zuführungsrohr (12) mit wenigstens einer düsenförmigen Austrittsöffnung (13) versehen ist.4. Device according to one of the preceding claims, characterized in that the flocculant supply pipe (12) is provided with at least one nozzle-shaped outlet opening (13).
EP85112142A 1984-10-10 1985-09-25 Device for introducing flocculants into sludge inside the loading chamber of a centrifuge Expired - Lifetime EP0177838B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3437157 1984-10-10
DE3437157 1984-10-10
DE3444349 1984-12-05
DE19843444349 DE3444349A1 (en) 1984-10-10 1984-12-05 DEVICE FOR ADDING FLOCCULATORS INTO THE SLUDGE WITHIN THE INLET CHAMBER OF A CENTRIFUGE

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EP0177838A2 true EP0177838A2 (en) 1986-04-16
EP0177838A3 EP0177838A3 (en) 1987-10-28
EP0177838B1 EP0177838B1 (en) 1990-05-09

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DE (2) DE3444349A1 (en)
FI (1) FI853805L (en)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO1991013686A1 (en) * 1990-03-13 1991-09-19 Alfa-Laval Separation A/S Decanter centrifuge
US5374234A (en) * 1990-03-13 1994-12-20 Alfa-Laval Separation A/S Decanter centrifuge with energy dissipating inlet
US6561965B1 (en) 2000-10-20 2003-05-13 Alfa Laval Inc. Mist pump for a decanter centrifuge feed chamber
CN110550712A (en) * 2019-08-27 2019-12-10 黄翠玲 Sewage treatment flocculating agent rapid mixing equipment

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Publication number Priority date Publication date Assignee Title
DE102004057861A1 (en) * 2004-11-30 2006-06-01 Siebtechnik Gmbh Inlet pipe for a centrifuge, comprises an inner end which joins the delivery area of the rotating centrifuge, and a carrier section

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Publication number Priority date Publication date Assignee Title
DE1101301B (en) * 1957-08-23 1961-03-02 Krauss Maffei Ag Method and device for thickening sludge, in particular sewage sludge, which contains constituents that are difficult to sediment, by centrifugation using a flocculant
DE1215606B (en) * 1963-01-31 1966-04-28 Beteiligungs & Patentverw Gmbh Device for mixing flocculants with slurries in settling centrifuges
US3471081A (en) * 1967-12-21 1969-10-07 Ametek Inc Acid feed pipe
US4052303A (en) * 1972-12-11 1977-10-04 Krauss-Maffei Ag Method of operating a centrifugal filter and a filter centrifuge operating according to this method
DE2822533A1 (en) * 1977-05-24 1978-12-07 Broadbent & Sons Ltd Thomas SOLID FULL CASE DECANTING CENTRIFUGE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101301B (en) * 1957-08-23 1961-03-02 Krauss Maffei Ag Method and device for thickening sludge, in particular sewage sludge, which contains constituents that are difficult to sediment, by centrifugation using a flocculant
DE1215606B (en) * 1963-01-31 1966-04-28 Beteiligungs & Patentverw Gmbh Device for mixing flocculants with slurries in settling centrifuges
US3471081A (en) * 1967-12-21 1969-10-07 Ametek Inc Acid feed pipe
US4052303A (en) * 1972-12-11 1977-10-04 Krauss-Maffei Ag Method of operating a centrifugal filter and a filter centrifuge operating according to this method
DE2822533A1 (en) * 1977-05-24 1978-12-07 Broadbent & Sons Ltd Thomas SOLID FULL CASE DECANTING CENTRIFUGE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013686A1 (en) * 1990-03-13 1991-09-19 Alfa-Laval Separation A/S Decanter centrifuge
US5374234A (en) * 1990-03-13 1994-12-20 Alfa-Laval Separation A/S Decanter centrifuge with energy dissipating inlet
US6561965B1 (en) 2000-10-20 2003-05-13 Alfa Laval Inc. Mist pump for a decanter centrifuge feed chamber
CN110550712A (en) * 2019-08-27 2019-12-10 黄翠玲 Sewage treatment flocculating agent rapid mixing equipment

Also Published As

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DE3444349A1 (en) 1986-04-10
EP0177838B1 (en) 1990-05-09
FI853805L (en) 1986-04-11
DE3577515D1 (en) 1990-06-13
EP0177838A3 (en) 1987-10-28
FI853805A0 (en) 1985-10-02

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