EP0515396B1 - Zentrifuge mit einer selbstentleerenden schleudertrommel - Google Patents

Zentrifuge mit einer selbstentleerenden schleudertrommel Download PDF

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Publication number
EP0515396B1
EP0515396B1 EP91902695A EP91902695A EP0515396B1 EP 0515396 B1 EP0515396 B1 EP 0515396B1 EP 91902695 A EP91902695 A EP 91902695A EP 91902695 A EP91902695 A EP 91902695A EP 0515396 B1 EP0515396 B1 EP 0515396B1
Authority
EP
European Patent Office
Prior art keywords
line
centrifuge
pressure
valve
discharge
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
EP91902695A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0515396A1 (de
Inventor
Karl-Heinz Zettier
Siegfried Smigielski
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.)
GEA Mechanical Equipment GmbH
Original Assignee
Westfalia Separator GmbH
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 Westfalia Separator GmbH filed Critical Westfalia Separator GmbH
Publication of EP0515396A1 publication Critical patent/EP0515396A1/de
Application granted granted Critical
Publication of EP0515396B1 publication Critical patent/EP0515396B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 centrifuge with a self-emptying centrifugal drum and with an inlet line for feeding the product to be centrifuged into the centrifugal drum and with at least one outlet line provided with an elastic line part for discharging a liquid phase under pressure from the centrifugal drum and with a device for Ejection of solids accumulating in the centrifugal drum in predefinable periods.
  • centrifuges are generally known. To discharge the solid, so-called partial emptying can be carried out, in which only a small part of the drum content is discharged. This process leads to a sudden drop in pressure in the drum and thus also in the drain line. This can have a negative impact on the functioning of downstream equipment.
  • skimming raw milk such as this. B. is known from DE-C-3539485
  • the skimmed milk outlet of the centrifuge is fed to a heater, and there is also a heat exchange with the raw milk.
  • a centrifuge is known from FR-A-1481803, in which a flow limiter is installed in the inlet line and in at least one outlet line, which is elastically deformable within its elastic limit.
  • the quantity limiter is intended to avoid a change in the quantity ratio between two drain lines when the pressure changes.
  • these devices are not able to compensate for the sudden drop in pressure in a discharge line which occurs in centrifugal drums with solid discharge devices when the solid is discharged.
  • the elastic deformation of the drain pipe and the associated change in volume are so small with the materials usually used that no influence on the pressure drop can be expected.
  • DE-A-2151475 describes a valve which is provided with a hose membrane which can be charged with compressed air from the outside. As a result, the passage cross section of the valve and thus also the amount of the medium flowing through it can be changed. Valves of this type are also suitable for keeping the pressure constant in a line through which a medium flows. If the flow is interrupted, as occurs when solids are ejected from a centrifugal drum in the centrifuge discharge lines, a pressure drop cannot be prevented.
  • the object of the invention is the known centrifuge to further develop that even when the centrifuge is partially emptied, there is no pressure drop in the discharge line.
  • the elastic line part is airtightly surrounded by a housing, and the housing is connected via a line with a valve arranged therein to a pressure source, the valve being in the open position before each solids discharge and the elastic line part thereby can be pressurized from the outside, whereby the elastic line part can be compressed in the pressure drop generated by the solids discharge in the drain line in such a way that a proportion of the volume of solids ejected in it can be displaced.
  • the valve Before partial emptying is triggered, the valve is first opened and the elastic line part is thereby pressurized. If the described pressure drop occurs in the discharge line during the subsequent partial emptying, the elastic line part is compressed by the pressure applied from the outside and displaces a part of the product volume present in it, which corresponds to the amount of solid ejected. This process compensates for the pressure drop.
  • the elastic line part is provided in a bypass line.
  • the one for the product derivation specific line section can then consist of solid material as usual.
  • valves are arranged in the drain line and the bypass line in such a way that the drain from the centrifuge can optionally be conducted exclusively via one of the two lines. This arrangement offers particular advantages in the circuit cleaning of the lines.
  • the centrifuge has a second outlet line
  • the valve is opened and product is briefly conveyed from the inlet to the second outlet line.
  • valves The actuation of the valves and the triggering of the solids emptying takes place advantageously via a control unit.
  • Compressed air is preferably used as the pressure medium.
  • the centrifuge is designated by 1, to which the product to be centrifuged is fed via an inlet line 2.
  • the liquid phases separated from one another in the centrifuge are discharged via the discharge line 3 and the second discharge line 4.
  • the drain line 3 is provided with a bypass line 5 in which there is an elastic Line part 6 is located, which is surrounded airtight by a housing 7, which is connected via a line 8 with a valve 9 provided therein to a pressure source 10.
  • a valve 11 is arranged in the drain line 3 and a valve 12 in the bypass line 5.
  • the inlet line 2 is connected to the outlet line 4 via a second bypass line 13, in which a valve 14 is provided.
  • the valve 9 is first opened and thereby the housing 7 is pressurized and thus also the elastic line part 6. If the partial emptying is triggered, the pressure in the centrifugal drum drops and part of the product in the discharge line 3 flows back into the drum. The quantity flowing back is replaced by product which is located in the elastic line part 6 because this is compressed as the pressure drop in the discharge line 3 begins due to the pressure difference which then arises.
  • the valve 14 in the second bypass line 13 is also opened during the emptying process. Since the pressure drop caused by the emptying is only present for approx. 1 second, the short-term product inflow into the second drain line 4 is tolerable in many cases. After the emptying process has ended, the bypass line 5 is refilled by a connecting line 15.
  • bypass line 5 and the drain line 3 can be rinsed separately by appropriate switching of the valves 11 and 12 in order to improve the cleaning effect.

Landscapes

  • Centrifugal Separators (AREA)
EP91902695A 1990-02-14 1991-01-22 Zentrifuge mit einer selbstentleerenden schleudertrommel Expired - Lifetime EP0515396B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4004459A DE4004459C2 (de) 1990-02-14 1990-02-14 Verfahren zum Betreiben einer Zentrifuge mit einer selbstentleerenden Schleudertrommel und Zentrifuge zur Durchführung des Verfahrens
DE4004459 1990-02-14
PCT/EP1991/000114 WO1991012081A1 (de) 1990-02-14 1991-01-22 Zentrifuge mit einer selbstentleerenden schleudertrommel

Publications (2)

Publication Number Publication Date
EP0515396A1 EP0515396A1 (de) 1992-12-02
EP0515396B1 true EP0515396B1 (de) 1994-05-25

Family

ID=6400074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902695A Expired - Lifetime EP0515396B1 (de) 1990-02-14 1991-01-22 Zentrifuge mit einer selbstentleerenden schleudertrommel

Country Status (6)

Country Link
US (1) US5267937A (enExample)
EP (1) EP0515396B1 (enExample)
DE (2) DE4004459C2 (enExample)
DK (1) DK0515396T3 (enExample)
IE (1) IE66728B1 (enExample)
WO (1) WO1991012081A1 (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505440C2 (sv) * 1995-05-02 1997-08-25 Alfa Laval Ab Förfarande och centrifugalseparator för separering av två vätskor
GB2301697B (en) * 1995-06-01 1999-04-07 Ronald Howard Brewis Harmonica tuning system
US6906172B2 (en) * 1998-03-10 2005-06-14 Large Scale Biology Corporation Flexible processing apparatus for isolating and purifying viruses, soluble proteins and peptides from plant sources
US9220295B2 (en) 2010-12-01 2015-12-29 R.J. Reynolds Tobacco Company Tobacco separation process for extracting tobacco-derived materials, and associated extraction systems
US9661876B2 (en) 2013-03-14 2017-05-30 R.J. Reynolds Tobacco Company Sugar-enriched extract derived from tobacco
US9301544B2 (en) 2013-03-14 2016-04-05 R.J. Reynolds Tobacco Company Protein-enriched tobacco-derived composition
DE102015119165B4 (de) * 2015-11-06 2022-06-09 Gea Mechanical Equipment Gmbh Verfahren zur Klärung eines fließfähigen Produktes mit einer Zentrifuge, insbesondere einem Separator
DE102017115112A1 (de) 2017-07-06 2019-01-10 Gea Mechanical Equipment Gmbh Anlage zur zentrifugalen Klärung einer Suspension

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023726B (de) * 1956-08-02 1958-01-30 Westfalia Separator Ag Zulaufeinrichtung fuer Milchzentrifugen zum Einstellen verschiedener konstanter Leistungen
FR1481803A (fr) * 1966-06-02 1967-05-19 Westfalia Separator Ag Dispositif pour maintenir constant le rapport quantitatif de constituants extraits d'un liquide au moyen d'un séparateur centrifuge
DE2151475A1 (de) * 1971-10-15 1973-04-19 Kurt Pause Kontinuierlich arbeitende dickschichtstroemungszentrifuge mit einer schichtdickenregelung
JPS5437964A (en) * 1977-08-30 1979-03-20 Mitsubishi Kakoki Kk Centrifugal separator
DE3340636A1 (de) * 1983-11-10 1985-05-23 Krauss-Maffei AG, 8000 München Verfahren und vorrichtung zum pneumatischen entleeren von zentrifugen
DE3539485A1 (de) * 1985-11-07 1987-05-21 Alfa Laval Ind Tech Verfahren zur steuerung einer milchverarbeitungsvorrichtung

Also Published As

Publication number Publication date
DK0515396T3 (da) 1994-09-26
DE4004459C1 (enExample) 1991-03-07
DE59101726D1 (de) 1994-06-30
WO1991012081A1 (de) 1991-08-22
US5267937A (en) 1993-12-07
IE910273A1 (en) 1991-08-14
DE4004459C2 (de) 1995-08-31
EP0515396A1 (de) 1992-12-02
IE66728B1 (en) 1996-01-24

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