EP0405125B1 - Method and apparatus for the post-treatment of heavy phase material in the heavy phase discharge zone of a screw decanter - Google Patents

Method and apparatus for the post-treatment of heavy phase material in the heavy phase discharge zone of a screw decanter Download PDF

Info

Publication number
EP0405125B1
EP0405125B1 EP19900109481 EP90109481A EP0405125B1 EP 0405125 B1 EP0405125 B1 EP 0405125B1 EP 19900109481 EP19900109481 EP 19900109481 EP 90109481 A EP90109481 A EP 90109481A EP 0405125 B1 EP0405125 B1 EP 0405125B1
Authority
EP
European Patent Office
Prior art keywords
screw
centrifuge
heavy phase
thick
phase material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900109481
Other languages
German (de)
French (fr)
Other versions
EP0405125A3 (en
EP0405125A2 (en
Inventor
Reinhold Dr. Schilp
Wolfgang Epper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0405125A2 publication Critical patent/EP0405125A2/en
Publication of EP0405125A3 publication Critical patent/EP0405125A3/en
Application granted granted Critical
Publication of EP0405125B1 publication Critical patent/EP0405125B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/12—Other accessories for centrifuges for drying or washing the separated solid particles
    • 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

Definitions

  • the invention relates to a method for facilitating the discharge of thick matter from the centrifuge drum of a solid bowl screw centrifuge with a conical centrifuge drum part in the thick matter discharge area.
  • the thick matter is discharged from screw centrifuges with a centrifuge drum that tapers conically in the thick matter discharge area in such a way that the thick matter “deposited” on the outer wall of the centrifuge drum is grasped by the screw conveyor coils and lifted out of the separated liquid via the conical drum part and transported to a discharge opening.
  • DE-A-32 16 393 describes a screw centrifuge in which the separated solid is overlaid with a washing liquid in the conical part of the centrifuge drum, as a result of which undesired constituents of the solid are washed out.
  • a centrifuge is also known in which pre-dewatered sludge with a dry matter content of 20 to 30% for further dewatering or for the extraction of extractable substances present in the thick matter is subjected to a steam effect in the under Pressurized steam emerges from nozzles arranged outside the centrifuge drum and acts on the thick material from below through the cylindrical drum shell designed as a sieve, whereby u. a. the thick matter is compressed.
  • the object of the invention is to considerably facilitate the removal of thick matter from the centrifuge of the thick matter separated from the liquid in the solid bowl screw centrifuge.
  • the solid bowl screw centrifuge consists of a cylindrical bowl shell (1) and a shell part (2) that tapers conically towards the thick material discharge with a screw conveyor (3) arranged coaxially therein.
  • the screw body (4) of the screw conveyor (3) is almond-shaped in the conical part (5) and is provided on the outside with a screw spiral (6), the screw flights of which are at a smaller distance from each other than the screw flights of the screw spiral (7) in the cylindrical part of the Auger.
  • the conical part (5) of the screw conveyor can also be used appropriately expanded on the outside, thereby reducing the distance between the conical casing part (5) of the screw conveyor and the conical drum casing (2) of the centrifuge in comparison to the cylindrical conveyor screw and drum casing part.
  • Openings (8) are arranged in the conical part (5) of the screw body (4) and are connected to supply lines (9 and 10) leading to the outside for the air.
  • the feed line (9) for the air is integrated directly into the conical part of the screw body, while the feed line (10) is guided centrally through the pipe socket (11) protruding into the centrifuge drum, which feeds the solid-liquid mixture to be separated (arrow 12) is used in the centrifuge. Since the feed line (10) is firmly connected to the screw body (4) and is set in rotation by the screw conveyor during operation of the centrifuge, it is rotatably supported in the end wall (13) of the pipe socket (11) and sealed off from the outside .
  • the solid-liquid mixture is fed in the direction of filing (12) to the pipe socket (11), from where it reaches the cylindrical part (1) of the centrifuge drum.
  • This separates the liquid from the thick matter the liquid separated from the thick matter (arrow 14) being directed in countercurrent to the thick matter (arrow 15) and being discharged to the outside on the left side (arrow 16) from the centrifuge drum, while the thick matter (arrow 15) is transported from the screw helix (7) to the right to the conical shell part (2), from where it is gripped by the screw helix (6) and discharged to the outside through the openings (17).
  • the thick material is introduced under pressure in the conical part (5) of the screw body (4) via the feed lines (10, 9) and openings (8) between the screw flights of the screw spiral (6).
  • an intensive loosening of the thick material is very advantageously achieved and the discharge of the thick material via the conical jacket part (2) is thereby effectively supported.
  • the screw flights in the conical part (5) of the screw conveyor are a much smaller distance apart have than the screw flights of the screw spiral (7) on the cylindrical part (4) of the screw conveyor, the space between the screw flights in the conical part (5) of the screw conveyor is completely filled with thick sludge and thereby the discharge of the thick material with the help of the air is made considerably easier.
  • the air will expediently be blown into the thick matter at a pressure of between about 0.5 and 5 bar in order to achieve sufficient mixing of the air with the particles in the thick matter. If necessary, it can also be expedient that the air is not only introduced into the thick material in the conical part between the screw flights openings (8), but also that air is additionally blown into the thick material through openings (18) arranged in the screw flights to facilitate the discharge of thick matter.
  • the object of the invention is not limited to the solid bowl screw centrifuge shown in the exemplary embodiment.
  • the process for facilitating the discharge of thick matter from the centrifuge drum can be used with exactly the same advantages in a differently designed solid bowl screw centrifuge, for example in solid bowl screw centrifuges, in which the solid is separated from the liquid in cocurrent.

Landscapes

  • Centrifugal Separators (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zur Erleichterung des Dickstoffaustrages aus der Zentrifugentrommel einer Vollmantel-Schneckenzentrifuge mit einem konischen Zentrifugentrommelteil im Dickstoffaustragsbereich.The invention relates to a method for facilitating the discharge of thick matter from the centrifuge drum of a solid bowl screw centrifuge with a conical centrifuge drum part in the thick matter discharge area.

Ein derartiger Verfahren ist bereits aus DE-A-3 216 393 bekannt.Such a method is already known from DE-A-3 216 393.

Der Dickstoffaustrag aus Schneckenzentrifugen mit im Dickstoffaustragsbereich konisch zulaufender Zentrifugentrommel erfolgt üblich in der Weise, daß der sich an der Zentrifugentrommelaußenwand "abgesetzte" Dickstoff von den Schneckenförderwendeln erfaßt und über den konischen Trommelteil aus der abgetrennten Flüssigkeit herausgehoben und zu einer Austragsöffnung transportiert wird.The thick matter is discharged from screw centrifuges with a centrifuge drum that tapers conically in the thick matter discharge area in such a way that the thick matter “deposited” on the outer wall of the centrifuge drum is grasped by the screw conveyor coils and lifted out of the separated liquid via the conical drum part and transported to a discharge opening.

Der Dickstoffaustrag aus Vollmantel-Schneckenzentrifugen bereitet häufig Schwierigkeiten, und zwar insbesondere dann, wenn der in der Zentrifugentrommel abgetrennte Dickstoff nur eine verhältnismäßig geringe Viskosität aufweist und daher von der Schneckenförderwendel im konischen Mantelteil der Zentrifugentrommel nicht erfaßt und nach außen ausgetragen wird, sondern zwischen der Schneckenwendel und der Innenwandung des konischen Trommelmantels in den Trennraum zurückfließt, wo es zu einer erneuten Vermischung der im Trennraum der Zentrifuge bereits voneinander getrennten Phasen kommt.The discharge of thick matter from solid-bowl screw centrifuges often presents difficulties, particularly when the thick matter separated in the centrifuge drum has only a relatively low viscosity and is therefore not detected by the screw conveyor spiral in the conical jacket part of the centrifuge drum and discharged to the outside, but between the screw spiral and the inner wall of the conical drum jacket flows back into the separation space, where the phases already separated from one another in the separation space of the centrifuge are mixed again.

Es ist bekannt, den von der Flüssigkeit abgetrennte Dickstoff vor seinem Austritt aus der Zentrifugentrommel mit fluiden Medien aus bestimmten Gründen zu behandeln. So wird in der DE-A-32 16 393 eine Schneckenzentrifuge beschrieben, in der der abgetrennte Feststoff im konischen Teil der Zentrifugentrommel mit einer Waschflüssigkeit überschichtet wird, wodurch unerwünschte Bestandteile des Feststoffs ausgewaschen werden.It is known to treat the thick matter separated from the liquid with fluid media for certain reasons before it leaves the centrifuge drum. DE-A-32 16 393 describes a screw centrifuge in which the separated solid is overlaid with a washing liquid in the conical part of the centrifuge drum, as a result of which undesired constituents of the solid are washed out.

Aus der EP-A-0 173 676 ist ferner eine Zentrifuge bekannt, in der bereits vorentwässerter Schlamm mit einem TS-Gehalt von 20 bis 30 % zur weiteren Entwässerung oder zur Extraktion von im Dickstoff vorhandener extrahierbarer Stoffe einer Dampfeinwirkung ausgesetzt wird, in dem unter Druck stehender Dampf aus außerhalb der Zentrifügentrommel angeordneten Düsen austritt und durch den siebartig ausgebildeten zylindrischen Trommelmantel von unten auf den Dickstoff einwirkt, wodurch u. a. eine Verdichtung des Dickstoffs erfolgt.From EP-A-0 173 676 a centrifuge is also known in which pre-dewatered sludge with a dry matter content of 20 to 30% for further dewatering or for the extraction of extractable substances present in the thick matter is subjected to a steam effect in the under Pressurized steam emerges from nozzles arranged outside the centrifuge drum and acts on the thick material from below through the cylindrical drum shell designed as a sieve, whereby u. a. the thick matter is compressed.

Die Einwirkung von Dampf auf den Dickstoff vermindert aber nicht die Schwierigkeiten, die sich beim Austrag des Dickstoffs aus der Zentrifuge ergeben können und ist insbesondere bei temperaturempfindlichen Schlämmen nicht anwendbar.The action of steam on the thick matter does not, however, reduce the difficulties that can arise when removing the thick matter from the centrifuge and cannot be used in particular with temperature-sensitive sludges.

Die Aufgabe der Erfindung besteht darin, den Dickstoffaustrag des in der Vollmantel-Schneckenzentrifuge von der Flüssigkeit abgetrennten Dickstoffes aus der Zentrifuge erheblich zu erleichtern.The object of the invention is to considerably facilitate the removal of thick matter from the centrifuge of the thick matter separated from the liquid in the solid bowl screw centrifuge.

Die gestellte Aufgabe wird mit den Maßnahmen des Kennzeichnungsteils des Anspruchs 1 gelöst. Eine vorteilhafte Ausgestaltung der Erfindung ist im Unteranspruch angegeben.The problem is solved with the measures of the characterizing part of claim 1. An advantageous embodiment of the invention is specified in the subclaim.

Durch die Einführung von Luft in den Dickstoff wird sehr vorteilhaft eine starke Auflockerung des Dickstoffes erreicht, so daß dadurch auch schwer förderbarer Dickstoff von den Schneckenwendeln der Förderschnecke mit Sicherheit erfaßt und über den konischen Zentrifugentrommelteil leicht nach außen transportiert werden kann. So können beispielsweise auch heterogen zusammengesetzte Stoffe, wie dünnflüssige Schlämme vermischt mit schweren Grobpartikeln sicher aus der Zentrifuge ausgetragen werden. Auf diese Weise wird im Vergleich zu bekannten Verfahren der Austrag von schwer förderbaren Dickstoffen aus der Vollmantel-Schneckenzentrifuge erheblich erleichtert bzw. bewerkstelligt.By introducing air into the thick matter, a strong loosening of the thick matter is very advantageously achieved, so that even difficult-to-convey thick matter can be gripped with certainty by the screw spirals of the screw conveyor and easily transported to the outside via the conical centrifuge drum part. For example, even heterogeneously composed substances such as thin sludge mixed with heavy coarse particles can be safely discharged from the centrifuge. In this way, the discharge of difficult-to-convey thick materials from the solid bowl screw centrifuge is considerably facilitated or accomplished in comparison with known methods.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Erläuterung einer in der Zeichnung im Längsschnitt schematisch dargestellten Vollmantel-Schneckenzentrifuge zur Durchführung des Verfahrens gemäß der Erfindung.Further details, features and advantages of the invention result from the following explanation of a solid bowl screw centrifuge schematically shown in the drawing in longitudinal section for carrying out the method according to the invention.

Wie die Zeichnung zeigt, besteht die Vollmantel-Schneckenzentrifuge aus einem zylindrischen Trommelmantel (1) und einem zum Dickstoffaustrag hin konisch verjüngten Mantelteil (2) mit darin koaxial angeordneter Förderschnecke (3). Der Schneckenkörper (4) der Förderschnecke (3) ist im konischen Teil (5) mandelförmig ausgebildet und an seiner Außenseite mit einer Schneckenwendel (6) versehen, deren Schneckengänge einen geringeren Abstand voneinander aufweisen als die Schneckengänge der Schneckenwendel (7) im zylindrischen Teil der Förderschnecke. Hierdurch wird sehr vorteilhaft erreicht, daß sich der Raum zwischen den Schneckengängen im konischen Teil (5) der Förderschnecke im Betrieb der Zentrifuge mit Dick- oder Feststoff füllt, so daß der Austrag des Dick- oder Feststoffes unter Mitwirkung der Luft aus der Zentrifuge besonders erleichtert und intensiviert wird. Um dies zu erreichen, kann zusätzlich auch der konische Teil (5) der Förderschnecke nach außen hin entsprechend erweitert ausgebildet und dadurch der Abstand zwischen dem konischen Mantelteil (5) der Förderschnecke und dem konischen Trommelmantel (2) der Zentrifuge im Vergleich zum zylindrischen Förderschnecken- und Trommelmantelteil verringert werden.As the drawing shows, the solid bowl screw centrifuge consists of a cylindrical bowl shell (1) and a shell part (2) that tapers conically towards the thick material discharge with a screw conveyor (3) arranged coaxially therein. The screw body (4) of the screw conveyor (3) is almond-shaped in the conical part (5) and is provided on the outside with a screw spiral (6), the screw flights of which are at a smaller distance from each other than the screw flights of the screw spiral (7) in the cylindrical part of the Auger. In this way it is very advantageously achieved that the space between the screw flights in the conical part (5) of the screw conveyor fills with thick or solid during operation of the centrifuge, so that the discharge of the thick or solid with the participation of air from the centrifuge is particularly facilitated and intensified. To achieve this, the conical part (5) of the screw conveyor can also be used appropriately expanded on the outside, thereby reducing the distance between the conical casing part (5) of the screw conveyor and the conical drum casing (2) of the centrifuge in comparison to the cylindrical conveyor screw and drum casing part.

Im konischen Teil (5) des Schneckenkörpers (4) sind Öffnungen (8) angeordnet, die mit nach außen führenden Zuleitungen (9 und 10) für die Luft in Verbindung stehen. Die Zuleitung (9) für die Luft ist hierbei direkt im konischen Teil des Schneckenkörpers integriert, während die Zuleitung (10) zentral durch den in die Zentrifugentrommel hineinragenden Rohrstutzen (11) hindurch geführt ist, der zur Zuführung des zu trennenden Feststoff-Flüssigkeitsgemisches (Pfeil 12) in die Zentrifuge dient. Da die Zuleitung (10) mit dem Schneckenkörper (4) fest verbunden ist und von der Förderschnecke im Betrieb der Zentrifuge mit in Umdrehungen versetzt wird, ist sie in der Stimwandung (13) des Rohrstutzens (11) drehbeweglich gelagert und nach außen hin dicht abgeschlossen.Openings (8) are arranged in the conical part (5) of the screw body (4) and are connected to supply lines (9 and 10) leading to the outside for the air. The feed line (9) for the air is integrated directly into the conical part of the screw body, while the feed line (10) is guided centrally through the pipe socket (11) protruding into the centrifuge drum, which feeds the solid-liquid mixture to be separated (arrow 12) is used in the centrifuge. Since the feed line (10) is firmly connected to the screw body (4) and is set in rotation by the screw conveyor during operation of the centrifuge, it is rotatably supported in the end wall (13) of the pipe socket (11) and sealed off from the outside .

Im Betrieb der Vollmantel-Schneckenzentrifuge wird das Feststoff-Flüssigkeitsgemisch in Bfeilrichtung (12) dem Rohrstutzen (11) zugeführt, von wo es in den zylindrischen Teil (1) der Zentrifugentrommel gelangt. Hierin erfolgt eine Trennung der Flüssigkeit vom Dickstoff, wobei die vom Dickstoff abgetrennte Flüssigkeit (Pfeil 14) im Gegenstrom zum Dickstoff (Pfeil 15) geführt und auf der linken Seite (Pfeil 16) aus der Zentrifugentrommel nach außen abgeführt wird, während der Dickstoff (Pfeil 15) von der Schneckenwendel (7) nach rechts zum konischen Mantelteil (2) transportiert wird, von wo er von der Schneckenwendel (6) erfaßt und durch die Öffnungen (17) nach außen ausgetragen wird. Gleichzeitig werden von außen dem Dickstoff im konischen Teil (5) des Schneckenkörpers (4) über die Zuleitungen (10, 9) und Öffnungen (8) Luft zwischen den Schneckengängen der Schneckenwendel (6) unter Druck eingeführt. Hierdurch wird sehr vorteilhaft eine intensive Auflockerung des Dickstoffes erreicht und dadurch der Austrag des Dickstoffes über den konischen Mantelteil (2) wirksam unterstützt. Da die Schneckengänge im konischen Teil (5) der Förderschnecke einen viel geringeren Abstand voneinander aufweisen als die Schneckengänge der Schneckenwendel (7) am zylindrischen Teil (4) der Förderschnecke, wird der Raum zwischen den Schneckengängen im konischen Teil (5) der Förderschnecke mit Dickschlamm voll ausgefüllt und dadurch der Austrag des Dickstoffes mit Hilfe der Luft ganz wesentlich erleichtert.When the solid bowl screw centrifuge is in operation, the solid-liquid mixture is fed in the direction of filing (12) to the pipe socket (11), from where it reaches the cylindrical part (1) of the centrifuge drum. This separates the liquid from the thick matter, the liquid separated from the thick matter (arrow 14) being directed in countercurrent to the thick matter (arrow 15) and being discharged to the outside on the left side (arrow 16) from the centrifuge drum, while the thick matter (arrow 15) is transported from the screw helix (7) to the right to the conical shell part (2), from where it is gripped by the screw helix (6) and discharged to the outside through the openings (17). At the same time, the thick material is introduced under pressure in the conical part (5) of the screw body (4) via the feed lines (10, 9) and openings (8) between the screw flights of the screw spiral (6). In this way, an intensive loosening of the thick material is very advantageously achieved and the discharge of the thick material via the conical jacket part (2) is thereby effectively supported. Because the screw flights in the conical part (5) of the screw conveyor are a much smaller distance apart have than the screw flights of the screw spiral (7) on the cylindrical part (4) of the screw conveyor, the space between the screw flights in the conical part (5) of the screw conveyor is completely filled with thick sludge and thereby the discharge of the thick material with the help of the air is made considerably easier.

Je nach Beschaffenheit, Zusammensetzung und Viskosität des Dickstoffes, wird man die Luft zweckmäßigerweise bei einem Druck zwischen etwa 0,5 und 5 bar in den Dickstoff einblasen, um dadurch eine ausreichende Durchmischung der Luft mit den im Dickstoff befindlichen Partikeln zu erreichen. Gegebenenfalls kann es hierbei auch zweckmäßig sein, daS die Luft nicht nur im konischen Teil zwischen den Schneckengängen angeordneten Öffnungen (8) in den Dickstoff eingeführt wird, sondern daß auch noch zusätzlich Luft über in den Schneckengängen angeordnete Öffnungen (18) in den Dickstoff eingeblasen wird, um den Dickstoffaustrag zu erleichtern.Depending on the nature, composition and viscosity of the thick matter, the air will expediently be blown into the thick matter at a pressure of between about 0.5 and 5 bar in order to achieve sufficient mixing of the air with the particles in the thick matter. If necessary, it can also be expedient that the air is not only introduced into the thick material in the conical part between the screw flights openings (8), but also that air is additionally blown into the thick material through openings (18) arranged in the screw flights to facilitate the discharge of thick matter.

Der Gegenstand der Erfindung ist nicht auf die im Ausführungsbeispiel dargestellte Vollmantel-Schneckenzentrifuge beschränkt. So kann beispielsweise das Verfahren zur Erleichtung des Dickstoffaustrages aus der Zentrifugentrommel mit eben denselben Vorteilen auch in einer beliebig anders ausgestalteten Vollmantel-Schneckenzentrifuge, beispielsweise in Vollmantel-Schneckenzentrifugen angewandt werden, in denen die Trennung des Feststoffes von der Flüssigkeit im Gleichstrom erfolgt.The object of the invention is not limited to the solid bowl screw centrifuge shown in the exemplary embodiment. For example, the process for facilitating the discharge of thick matter from the centrifuge drum can be used with exactly the same advantages in a differently designed solid bowl screw centrifuge, for example in solid bowl screw centrifuges, in which the solid is separated from the liquid in cocurrent.

Claims (2)

  1. A method to facilitate the discharge of heavy-phase material from the centrifuge drum of a solid-bowl screw conveyor centrifuge with a conical centrifuge drum section in the heavy-phase material discharge zone, characterised in that air, at a greater pressure relative to the pressure conditions obtaining in the centrifuge, is introduced into the heavy-phase material in the discharge zone of the centrifuge.
  2. A method according to Claim 1, characterised in that the air at an excess pressure is blown into the heavy-phase material at between 0.5 and 5 bar.
EP19900109481 1989-06-29 1990-05-18 Method and apparatus for the post-treatment of heavy phase material in the heavy phase discharge zone of a screw decanter Expired - Lifetime EP0405125B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893921328 DE3921328A1 (en) 1989-06-29 1989-06-29 METHOD AND DEVICE FOR TREATING THE DICKER IN THE DISCHARGE EXHAUST AREA OF A FULL-COVERED SCREW CENTRIFUGE
DE3921328 1989-06-29

Publications (3)

Publication Number Publication Date
EP0405125A2 EP0405125A2 (en) 1991-01-02
EP0405125A3 EP0405125A3 (en) 1991-04-17
EP0405125B1 true EP0405125B1 (en) 1994-01-19

Family

ID=6383877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900109481 Expired - Lifetime EP0405125B1 (en) 1989-06-29 1990-05-18 Method and apparatus for the post-treatment of heavy phase material in the heavy phase discharge zone of a screw decanter

Country Status (5)

Country Link
EP (1) EP0405125B1 (en)
JP (1) JPH0338265A (en)
DE (2) DE3921328A1 (en)
DK (1) DK0405125T3 (en)
ES (1) ES2048356T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2848705B2 (en) * 1992-06-09 1999-01-20 ヤマサ醤油株式会社 Monoclonal antibody against human lung surfactant apoprotein D and its use
DE4315074B4 (en) * 1993-05-06 2005-01-05 Baumann-Schilp, Lucia Method and device for dewatering sludge
DE19901655A1 (en) * 1999-01-18 2000-07-20 Baker Hughes De Gmbh Centrifuge for wet mechanical separation of solid mixtures
DK200200598A (en) * 2002-04-22 2003-10-23 Alfa Laval Copenhagen As decanter centrifuge
CN110961261A (en) * 2019-12-29 2020-04-07 张家港市华祥离心机制造有限公司 Energy-saving driving device of horizontal centrifuge
CN116351586B (en) * 2023-06-02 2023-08-18 张家港市中南化工机械有限公司 Horizontal spiral discharging filtering type centrifugal machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE193997C (en) *
DE205960C (en) *
DE1754873U (en) * 1957-08-29 1957-10-24 Krauss Maffei Ag SCREW CENTRIFUGE WITH A FULLY SLEEVED DRUM AND A GAS-TIGHT CLOSED CENTRIFUGAL HOUSING.
US3326457A (en) * 1964-02-14 1967-06-20 United States Steel Corp Method and apparatus for steamassisted centrifugal dewatering
DE3216393A1 (en) * 1982-05-03 1983-11-03 Bayer Ag, 5090 Leverkusen SCREW CENTRIFUGE WITH WASHING DEVICE
GB8328894D0 (en) * 1983-10-28 1983-11-30 Broadbent & Sons Ltd Thomas Decanting type centrifuges
AT387160B (en) * 1984-08-30 1988-12-12 Voest Alpine Ag CENTRIFUGE FOR DRAINAGE AND DRYING OF PRE-DRAINAGE SLUDGE
US4654022A (en) * 1986-01-31 1987-03-31 Pennwalt Corporation Rinsing on a solid bowl centrifuge

Also Published As

Publication number Publication date
DK0405125T3 (en) 1994-02-28
ES2048356T3 (en) 1994-03-16
EP0405125A3 (en) 1991-04-17
DE3921328A1 (en) 1991-01-10
DE59004283D1 (en) 1994-03-03
EP0405125A2 (en) 1991-01-02
JPH0338265A (en) 1991-02-19

Similar Documents

Publication Publication Date Title
DE3202294C1 (en) Continuously working full-jacket countercurrent centrifugal extractor
DE3043194A1 (en) DEVICE FOR MECHANICALLY SEPARATING LIQUIDS FROM LIQUIDS-SOLIDS MIXTURES IN A SCREW PRESS
DE3318793A1 (en) DEVICE FOR DEHUMIDIFYING SLUDGE
DE2930581A1 (en) CENTRIFUGE FOR SORTING AND SEPARATING SOLIDS
DE1461448A1 (en) Device for separating substances
DE2256860A1 (en) METHOD OF ENRICHMENT OF ORES AND CENTRIFUGE TO CARRY OUT THIS PROCEDURE
DE69307604T2 (en) Centrifuge for separating oil from oil sludge without adding drinking water
DE3301099C2 (en)
EP0405125B1 (en) Method and apparatus for the post-treatment of heavy phase material in the heavy phase discharge zone of a screw decanter
DE4115347A1 (en) METHOD AND DEVICE FOR SEPARATING, IN PARTICULAR CLASSIFICATION OF A SOLID-LIQUID MIXTURE
DE1024438B (en) Process for separating solids from a liquid
WO1997016253A9 (en) Separator of light materials from sand and gravel
DE1782428A1 (en) Solid bowl screw centrifuge
CH475169A (en) Separation and cleaning device for a liquid mixture that also contains solids
DE1757368C3 (en) Solid bowl screw centrifuge
DE19801733C2 (en) Method and device for separating wastewater with bio-organic dirt into solids and the individual liquids
DE10200599B4 (en) Device for separating organic and inorganic material from a liquid
DE2822533A1 (en) SOLID FULL CASE DECANTING CENTRIFUGE
DE3335873A1 (en) Solid bowl screw centrifuge for the separation of a solid-liquid mixture
EP1383607B1 (en) Solid bowl spiral centrifuge and a method for obtaining oil using a solid bowl spiral centrifuge
DE963409C (en) Screw centrifuge for muddy or fine-grained liquid-solid mixtures
EP0002727A1 (en) Process and apparatus for the continuous filtration of liquids
DE2321653C3 (en) Solid bowl screw centrifuge for separating suspensions with floating solids
DE3440108A1 (en) Process and apparatus for sorting mineral materials of different density into at least three density fractions
DE3005885A1 (en) FULL-COVERED SNAIL CENTRIFUGE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE DK ES FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE DK ES FR GB IT SE

17P Request for examination filed

Effective date: 19911010

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KLOECKNER-HUMBOLDT-DEUTZ AG

17Q First examination report despatched

Effective date: 19921217

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK ES FR GB IT SE

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: KLOECKNER-HUMBOLDT-DEUTZ AG

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940118

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REF Corresponds to:

Ref document number: 59004283

Country of ref document: DE

Date of ref document: 19940303

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2048356

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940413

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19940419

Year of fee payment: 5

Ref country code: GB

Payment date: 19940419

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19940506

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19940630

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 90109481.3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950518

Ref country code: DK

Effective date: 19950518

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950519

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950519

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950727

Year of fee payment: 6

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950518

EUG Se: european patent has lapsed

Ref document number: 90109481.3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960229

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050518