US3598304A - Separator sterilizable by superheated steam - Google Patents

Separator sterilizable by superheated steam Download PDF

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Publication number
US3598304A
US3598304A US8260A US3598304DA US3598304A US 3598304 A US3598304 A US 3598304A US 8260 A US8260 A US 8260A US 3598304D A US3598304D A US 3598304DA US 3598304 A US3598304 A US 3598304A
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US
United States
Prior art keywords
drum
frame
casing
sleeve
sealing
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
US8260A
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English (en)
Inventor
Heinrich Hemfort
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
Application granted granted Critical
Publication of US3598304A publication Critical patent/US3598304A/en
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
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like

Definitions

  • a centrifugal separator comprising a drum whose driving spindle is rotatably mounted in a frame, a casing [541 gggm STERIUZABLE BY SUPERHEATED surrounding the drum and attached to the frame, is provided 5 cm 40 F with a sealing means between the frame or casing and the drum to prevent passage of steam used for sterilizing, from the [52] 11.8. CI. 233/] A casing to within the frame.
  • the sealing means can be in sliding [51] Int. Cl. 801d 21/26 sealing engagement with the frame and can be moved axially [50] Field of Search 233/1, 1 A, upwardly so that the upper end thereof is placed in sealing en- 20, 20 A gagement with a sealing ring on the drum.
  • the invention relates to separators whose drum is enveloped by a stationary casing designed to catch and remove one or more of the components of the material being centrifuged.
  • the casing In the case of recovering a plurality of components the casing is divided into an appropriate number of stacked catching chambers, each of which is provided with an outlet.
  • the casing can be composed of a number of parts. It is removably attached to the frame, which is also stationary.
  • the separator can also be equipped with other material removing means, such as skimmer disks.
  • the stationary and the rotating parts are disposed at a distance from one another that is large enough to prevent interference even when the drum is unbalanced.
  • the inner part of the casing surrounding the drum communicates (through an additional intermediate chamber in some cases) with the inside of the lower part of the frame in which the transmission and the oil bath are housed.
  • German Pat. No. 487,302 discloses a labyrinth packing which, to a great extent, prevents the penetration of liquid and vapors into the liwer part of the frame. Nevertheless, a perfect seal cannot be obtained in this manner.
  • Separators of the above-described kind are used also in pharmaceutical industries for harvesting from nutrient solutions bacteria that are not too hazardous and are not sensitive to external influences.
  • a sterilization is undertaken, before ".ie centrifuging operation is begun and/or after it has ended, by feeding hot water or a suitable disinfectant solution to the rotating drum for a period of time.
  • a so-called flush desludging is performed, so that the disinfectant solution can exercise its germicidal action also on the sludge catcher and on the outlets provided for the solids.
  • the invention is directed to the problem of creating a design that makes it possible to hermetically seal the casing from the inside of the frame, thereby permitting the separator to be sterilized with steam, commonly superheated steam, and, therefore, to be used for the harvesting of hazardous and/or delicate bacteria.
  • the separator is characterized by an axially displaceable closure body or sealing means which is in sliding seal engagement with the frame or the bottom of the catcher casing, and which in its uppermost position cooperates with a sealing ring disposed in the hub of the drum, a closable condensate drain communicating with the bottom of the catcher casing is also provided, for draining condensate from the casing.
  • the device which feeds the control liquid and which is in the form of an annular hol low body can serve as the closing body.
  • the control fluid feed tube affixed to the hollow body must have the necessary flexibility, which can be achieved merely by bending it accordingly.
  • the axial displacement of the closing body can be performed, for example, by the turning, with a hand wrench, a plurality of shafts to whose extremities pins are eccentrically attached, which engage in recesses in the closure body.
  • the lower portion of the frame is kept germ-free during operation by known measures which do not pertain to the present invention.
  • FIG. 1 is a self-cleaning separator constructed according to the invention
  • FIG. 2 is an enlarged view of a portion of the apparatus similar to that shown in FIG. 1;
  • FIG. 3 is a partial showing of a separator having a solid-wall drum, employing the construction according to the invention.
  • FIG. 4 is an enlarged view indicating a preferred construction.
  • the invention is concerned with a separator comprising a drum the spindle of which is rotatably mounted in a stationary frame by means of bearings, and having a stationary casing mounted on the frame and disposed about the drum for receiving material discharged from the drum.
  • a separator comprising a drum the spindle of which is rotatably mounted in a stationary frame by means of bearings, and having a stationary casing mounted on the frame and disposed about the drum for receiving material discharged from the drum.
  • the invention provides a sealing means between the frame or casing and the drum for eliminating said access when sterilizing the drum and the casing.
  • the sealing means comprises an annular closure body, axially slidable in the frame or in the bottom of the casing.
  • the closure body includes a first sleeve, disposed at one end thereof and which is in sliding seal engagement with the frame or casing, and a second sleeve disposed at the other end thereof.
  • a sealing ring is mounted in the hub of the drum, axially aligned with the second sleeve of the closure body and is normally axially spaced therefrom. Means are provided for axially moving the sleeve to press the closure body against the sealing ring to provide said seal between the frame and drum for eliminating said access.
  • the drum is indentified as l and the casing surrounding it is marked 2, the bottom 3 of the casing being attached to the frame 4.
  • the worm gear 6 In the chamber 5 of frame 4 is housed the worm gear 6 and the rest of the drive which powers the spindle 7 and is immersed in an oil bath.
  • the drum is of the type which periodically ejects through orifices 8 in the drum periphery 9 the solids centrifuged from the liquid being treated. These solids are caught by the catcher I0 of casing 2 and carried out through the discharge I I.
  • the clarified fluid is delivered by a skimmer disk 12 into the discharge line 13 which is provided with a throttling member 14 and a pressure gauge 15.
  • the catcher chamber 10 communicates through the annular gap 16 with an intermediate chamber 17 which in turn communicates through an annular gap 18 and the neck bearing l9 with the chamber 5 in frame 4.
  • the neck bearing 19 can be of the construction disclosed in German Pat. No. 1,031,222.
  • the control fluid for the operation of the member that opens and closes the ejection orifices 8 is brought in through a line 20 which empties into a bell-shaped hollow body or is carried along a hood 21.
  • this hood 21 serves as the closure body and comprises a first sleeve or cylinder 22 (FIG. 2) which is axially displaceable and is sealingly guided in the bottom 3 of the casing 2.
  • the sleeve 22 is provided with recesses into which pins 23 engage which are mounted eccentrically on the end faces of rotatably mounted shafts 24.
  • the shafts 24 By turning the shafts 24, e.g., by means of a square drive 25 with, for example, a hand wrench, the closing body 21 can be displaced axially upward.
  • a second sleeve 22a comes to rest against a sealing ring 27 disposed in the drum hub 26, thereby closing the annular gap 18.
  • the casing 2 is provided with a bottom condensate drain 28 and the solids discharge 11 is provided with a shut-off means which is not shown.
  • HO. 3 shows the apparatus according to the invention in conjunction with a solid-wall drum in which solids separated from the liquid being treated gather and which has to be opened in order to clean it out.
  • the seals illustrated include a sealing gasket 30 as can be seen in FIG. 4.
  • the gasket can be mounted on either the sealing ring 27 or the second sleeve 22a of the closing body 21. Preferably it is mounted on the second sleeve 22a, as is shown in FIG. 4, as the gasket is then mounted in a stationary ele ment, rather than on a rotating member.
  • the apparatus according to the invention is also applicable to all other types of separating drums.
  • a separator comprising a drum having a hub and as stationary parts a frame and casing, said casing being disposed about the drum for receiving material discharged from the drum, a rotatable driving spindle, a driving gear for driving the spindle, the drum being mounted on the spindle via the drum hub for rotation therewith, and a bearing disposed on the frame operatively interposed between the frame and the drum, wherein the interior of the casing surrounding the drum is normally in communication for fluid flow with the interior of the frame so that upon sterilizing with steam, there is access for steam to the bearing, the improvement of sealing means between the frame and the drum for eliminating said access when sterilizing, comprising: i
  • a closure body disposed about the spindle and axially slidable therealong, terminating at one end thereof in a first sleeve which is in sliding seal engagement with one of said stationary parts, and terminating at the other end thereof in a second sleeve,
  • said means for axially moving the closure body comprising rotatable shafts each having integral with one end thereof an eccentrically mounted pin, recesses in said closure body receiving said pins.

Landscapes

  • Centrifugal Separators (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
US8260A 1969-02-28 1970-02-03 Separator sterilizable by superheated steam Expired - Lifetime US3598304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691910211 DE1910211A1 (de) 1969-02-28 1969-02-28 Mit Heissdampf sterilisierbarer Separator

Publications (1)

Publication Number Publication Date
US3598304A true US3598304A (en) 1971-08-10

Family

ID=5726681

Family Applications (1)

Application Number Title Priority Date Filing Date
US8260A Expired - Lifetime US3598304A (en) 1969-02-28 1970-02-03 Separator sterilizable by superheated steam

Country Status (7)

Country Link
US (1) US3598304A (https=)
CH (1) CH497922A (https=)
DE (1) DE1910211A1 (https=)
FR (1) FR2031170A5 (https=)
GB (1) GB1231367A (https=)
NL (1) NL6918996A (https=)
SE (1) SE345211B (https=)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006006A1 (en) * 1985-04-11 1986-10-23 Alfa-Laval Separation Ab Centrifugal separator comprising a rotor, which around its circumference has outlets for intermittently discharging a separated product and outlet for discharging an operating liquid
US20060009341A1 (en) * 2004-07-08 2006-01-12 Yoshinori Tobita Centrifugal separator
KR20190008572A (ko) * 2016-05-18 2019-01-24 게아 미케니컬 이큅먼트 게엠베하 원심분리기의 열적 살균 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992843A (en) * 1956-09-06 1961-07-18 Maytag Co Seal connection
US3126338A (en) * 1959-11-30 1964-03-24 Hermetically sealable mounting means
US3269647A (en) * 1963-11-18 1966-08-30 Pennsalt Chemicals Corp Centrifuge having a sealed housing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992843A (en) * 1956-09-06 1961-07-18 Maytag Co Seal connection
US3126338A (en) * 1959-11-30 1964-03-24 Hermetically sealable mounting means
US3269647A (en) * 1963-11-18 1966-08-30 Pennsalt Chemicals Corp Centrifuge having a sealed housing

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006006A1 (en) * 1985-04-11 1986-10-23 Alfa-Laval Separation Ab Centrifugal separator comprising a rotor, which around its circumference has outlets for intermittently discharging a separated product and outlet for discharging an operating liquid
US20060009341A1 (en) * 2004-07-08 2006-01-12 Yoshinori Tobita Centrifugal separator
US7591775B2 (en) * 2004-07-08 2009-09-22 Hitachi Koki Co., Ltd. Centrifugal separator with sterilizing apparatus
US20090239729A1 (en) * 2004-07-08 2009-09-24 Yoshinori Tobita Centrifugal separator
US20110028297A1 (en) * 2004-07-08 2011-02-03 Hitachi Koki Co., Ltd. Method for sterilizing a centrifugal separator
US7901342B2 (en) * 2004-07-08 2011-03-08 Hitachi Koki Co., Ltd. Centrifugal separator with sterilizing apparatus
US7909751B2 (en) * 2004-07-08 2011-03-22 Hitachi Koki Co., Ltd. Method for sterilizing a centrifugal separator
KR20190008572A (ko) * 2016-05-18 2019-01-24 게아 미케니컬 이큅먼트 게엠베하 원심분리기의 열적 살균 방법
US20190143343A1 (en) * 2016-05-18 2019-05-16 Gea Mechanical Equipment Gmbh Method for thermally disinfecting a centrifuge
US10799886B2 (en) 2016-05-18 2020-10-13 Gea Mechanical Equipment Gmbh Method for thermally disinfecting a centrifuge
AU2017267066B2 (en) * 2016-05-18 2022-02-03 Gea Mechanical Equipment Gmbh Method for thermally disinfecting a centrifuge
DE102016109086B4 (de) 2016-05-18 2024-06-27 Gea Mechanical Equipment Gmbh Verfahren zur thermischen Desinfizierung einer Zentrifuge

Also Published As

Publication number Publication date
NL6918996A (https=) 1970-09-01
CH497922A (de) 1970-10-31
DE1910211A1 (de) 1970-09-10
FR2031170A5 (https=) 1970-11-13
SE345211B (https=) 1972-05-23
GB1231367A (https=) 1971-05-12

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