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 PDFInfo
- 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
Links
- 239000000463 material Substances 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 8
- 239000007787 solid Substances 0.000 description 14
- 230000010006 flight Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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.
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- 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)
- 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.
- 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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3921328 | 1989-06-29 | ||
| 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 |
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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE205960C (en) * | ||||
| DE193997C (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 |
-
1989
- 1989-06-29 DE DE19893921328 patent/DE3921328A1/en not_active Withdrawn
-
1990
- 1990-05-18 DE DE90109481T patent/DE59004283D1/en not_active Expired - Fee Related
- 1990-05-18 EP EP19900109481 patent/EP0405125B1/en not_active Expired - Lifetime
- 1990-05-18 ES ES90109481T patent/ES2048356T3/en not_active Expired - Lifetime
- 1990-05-18 DK DK90109481T patent/DK0405125T3/en active
- 1990-06-29 JP JP17036090A patent/JPH0338265A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0338265A (en) | 1991-02-19 |
| EP0405125A3 (en) | 1991-04-17 |
| DE3921328A1 (en) | 1991-01-10 |
| EP0405125A2 (en) | 1991-01-02 |
| ES2048356T3 (en) | 1994-03-16 |
| DE59004283D1 (en) | 1994-03-03 |
| DK0405125T3 (en) | 1994-02-28 |
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