US3802621A - Washable centrifuge - Google Patents

Washable centrifuge Download PDF

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Publication number
US3802621A
US3802621A US00338157A US33815773A US3802621A US 3802621 A US3802621 A US 3802621A US 00338157 A US00338157 A US 00338157A US 33815773 A US33815773 A US 33815773A US 3802621 A US3802621 A US 3802621A
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US
United States
Prior art keywords
drum
casing
centrifuge
outlet
inlet
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
US00338157A
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English (en)
Inventor
K Merzenich
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.)
Bird Machine Co Inc
Original Assignee
Bird Machine Co Inc
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 Bird Machine Co Inc filed Critical Bird Machine Co Inc
Application granted granted Critical
Publication of US3802621A publication Critical patent/US3802621A/en
Assigned to FIRST NATIONAL BANK OF BOSTON, THE reassignment FIRST NATIONAL BANK OF BOSTON, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BIRD MACHINE COMPANY, INC.
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
    • 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
    • B04B15/00—Other accessories for centrifuges
    • B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like

Definitions

  • This invention relates to a centrifuge, especially a centrifuge of the type which has a rotatable drum that is solid or partly or all a screen and which is surrounded all around by a casing, in which drum is a coaxiallymounted screw conveyor which rotatesat a different speed to discharge solid matter.
  • An object of this invention is to provide a centrifuge of the aforesaid type which can be cleaned even under strict health requirements without the need for bothersome disassembly and reassembly operations. Another object is to provide such a centrifuge which can be made at little additional cost as compared with existing centrifuges of this type.
  • the problem is solved in that the openings in the ends of the casing for the drum shaft are provided with seals and the casing is provided with at least one inflow opening and at least one outflow opening for a washing liquid. Because of this construction, it is possible to fill with washing liquid the entire volume of the centrifuge lying within the casing and then to drive the drum and the solid-matter discharge screw conveyor, which is connected to the drum by a suitable gear unit, at a low rotation speed with periodic reversal of the direction of rotation if necessary.
  • At least one outflow opening preferably is arranged on top of the casing and inflow lines empty into the closeable filtrate discharge pipe and also into the closeable solidmatter discharge. pipe of the casing.
  • the drawing shows a centrifuge which is washable in accordance with the invention having a solid or closed drum, but as previously stated the drum may be partly or all a screen.
  • Centrifuge drum 1 is rotated at a high rotation speed, and within the drum a solid-matter discharge screw conveyor 2 is rotated at a different rotation speed.
  • the centrifuge drum is driven, for example, by a belt pulley 3, while the solid-matter discharge screw conveyor 2 is driven for its part by the centrifuge drum via a suitable gear unit, for example, a planetary gear unit 4.
  • the centrifuge drum has solid-matter discharge openings 5 at its conically tapered end and filtrate overflow openings 6 at the opposite end.
  • the ad'- mission of the suspension to be centrifuged occurs through afeed pipe 7 which projects coaxially into the interior of the solid-matter discharge screw conveyor while, in the region of the outlet orifice of the feed pipe, openings 8 are provided in the support of the solid-matter discharge screw conveyor for the suspension to be treated.
  • the centrifuge drum is surrounded all around by a casing 9 which below the centrifuge drum is provided with a solid-matter discharge pipe 10 at the solidmatter discharge end of the drum and with a filtrate discharge pipe 11 at the filtrate outlet end of the drum.
  • the openings for the drum shafts l2, 13 in the casing 9 are each completely sealed off by a seal 14.
  • Inflow lines 15 and 16 for a washing liquid empty into the solid-matter discharge pipe 10 and also into the filtrate discharge pipe 11, these lines being provided with valves 23 and 24.
  • Below the discharge of the washing-liquid. inflow lines 15 and 16, the spouts 10 and 11 are provided with shutoff devices 17 and 18.
  • outflow lines 19 and 20 which are also provided with valves 21 and 22 are arranged on the top of the casing approximately in the region of the drum ends.
  • Seals 25, 26 are provided between drum shafts 12, 13 and conveyor shafts 27, 28 to prevent outflow of water between the shafts, and these may be the usual grease seals at the end of bushings 29 between the two shafts.
  • a seal (not shown) is provided around feed pipe 7 where it enters the outer end of conveyor shaft 27.
  • Possible washing liquids include hot water, water with cleaning additives or even, depending on the nature of the substances treated in the centrifuge, lye and acid solutions, so that besides the purely mechanical cleaning action, possibly present deposits or residues are chemically decomposed while, by means of the special arrangement of the inflow and outflow lines, a suitable manipulation and control of the inflow and outflow valves also enables the corners of the casing, drum and screw conveyor support to be completely washed free.
  • the cleaning of the centrifuge constructed according to the invention is accomplished in the following manner. After the shutoff devices 17 and 18 in the discharge pipes are first closed, by opening the valves 23 and 24 in the washing-liquid inflow lines 15 and 16 and opening valves 21 and 22 to permit air escape, the casing, the centrifuge drum and the inner volume of the screw conveyor support which comes into contact with the substance to be centrifuged are completely filled with washing liquid so that valves 21 and 22 may be closed. The drum fills through openings and 6 while the feed chamber of the conveyor support fills through openings 8.
  • the drum now is rotated at a rotation speed which is relatively small in comparison with the operating rotation speed so that, due to the resulting intense agitation, all parts of the centrifuge that come into contact with the centrifuged substance are washed and possibly present deposits are decomposed. In doing this, it is effective to reverse the direction of rotation from time to time.
  • one of the outflow valves is opened, for example, the outflow valve 22, while the outflow valve 21 remains closed and also the inflow valve 24 is closed while inflow valve 23 remains open so that the machine preferably with continuous rotation of the drum is flowed through diagonally by washing liquid.
  • the inflow valve 24 and the outflow valve 21 are then opened while inversely the valves 22 and 23 are closed so that the other end of the machine is washed out crosswise. It is advantageous here if the suspension admission pipe 7 is also provided with an inlet for washing liquid so that the inflow pipe 7 can also be washed out and fresh washing liquid can be introduced into the interior of the screw-conveyor support.
  • the casing 9 can additionally be provided with a third valved inlet 30 for washing liquid on its bottom between the two discharge pipes so that the middle region of the casing also can be supplied with fresh washing liquid.
  • a valved drain pipe 31 is provided therein.
  • shut-off devices 17 and 18, and valved outlet 31 if provided are
  • Valves 23 and 24, and valved inlet 30 if provided, are closed.
  • Valves 21 and 22, which are arranged to open outflow lines 19 and 20.to atmosphere as well as to the water outflow connection, are opened to atmosphere.
  • the water in the casing now completely drains out its bottom except for a small amount left in the centrifuge drum, which is automatically removed when the machine is started up with slurry feed.
  • a centrifuge having a rotatable drum, a rotatable conveyor within the drum, means for rotating said drum and said conveyor at different speeds, a casing completely surrounding said drum, said drum having one or more openings from the interior thereof into said casing, means forming liquid-tight seals between the exterior of said casing and the interior and exterior of said drum, inlet and outlet means in said casing for respectively supplying washing liquid into and discharging it from said casing and arranged to enable said casing to be filled with said liquid to a level at which said drum at least substantially fills with the liquid through said openings, and thereafter to enable said liquid to be drained from said casing, and means for closing and opening said inlet and outlet means.

Landscapes

  • Centrifugal Separators (AREA)
  • Extraction Or Liquid Replacement (AREA)
US00338157A 1972-03-14 1973-03-05 Washable centrifuge Expired - Lifetime US3802621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2212178A DE2212178A1 (de) 1972-03-14 1972-03-14 Spuelbare zentrifuge

Publications (1)

Publication Number Publication Date
US3802621A true US3802621A (en) 1974-04-09

Family

ID=5838806

Family Applications (1)

Application Number Title Priority Date Filing Date
US00338157A Expired - Lifetime US3802621A (en) 1972-03-14 1973-03-05 Washable centrifuge

Country Status (6)

Country Link
US (1) US3802621A (enrdf_load_stackoverflow)
JP (1) JPS5649625B2 (enrdf_load_stackoverflow)
CA (1) CA971531A (enrdf_load_stackoverflow)
DE (1) DE2212178A1 (enrdf_load_stackoverflow)
FR (1) FR2175862B1 (enrdf_load_stackoverflow)
GB (1) GB1425270A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036426A (en) * 1974-02-15 1977-07-19 Pennwalt Corporation Method of cleaning a centrifuge
US4147293A (en) * 1977-01-18 1979-04-03 Westfalia Separator Ag Continuously operating solid-jacket counterflow centrifugal extractor
US4654022A (en) * 1986-01-31 1987-03-31 Pennwalt Corporation Rinsing on a solid bowl centrifuge
US4828541A (en) * 1986-05-06 1989-05-09 Madsen Niels F Decanter centrifuge
US4978331A (en) * 1989-07-11 1990-12-18 Alfa-Laval Ab Method and apparatus for cleaning in place of a decanter centrifuge
WO1993020946A1 (en) * 1992-04-10 1993-10-28 Warman International Limited Apparatus for separating materials
US20040007137A1 (en) * 1999-01-19 2004-01-15 Hwang Yong Y. Oil treatment system
US20040185999A1 (en) * 2001-10-02 2004-09-23 Hans-Joachim Beyer Solid bowl helical conveyor centrifuge with a pressurized housing
US20050192173A1 (en) * 2004-02-07 2005-09-01 Thomas Broadbent & Sons Limited Washing of separated solids in solid bowl and screen bowl decanting centrifuges
DE102005028825A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Verbesserte Zentrifugenvorrichtung zur Vermeidung von Cross-Kontamination
US20100216623A1 (en) * 2009-02-20 2010-08-26 Vastola Michael L Clean-in-place decanter centrifuge
US20100273628A1 (en) * 2007-12-07 2010-10-28 Atsushi Onodera Horizontal centrifugal separator
US20120010065A1 (en) * 2008-11-28 2012-01-12 Alfa Laval Corporate Ab Decanter centrifuge with a hinged lid
WO2016142059A1 (en) * 2015-03-10 2016-09-15 Ecofast Italia S.R.L. - Tecnologie Ambientali Separator for separating chopped food waste material

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194564U (enrdf_load_stackoverflow) * 1975-01-28 1976-07-29
CH615604A5 (enrdf_load_stackoverflow) * 1977-02-22 1980-02-15 Escher Wyss Ag
JPS6171856A (ja) * 1984-09-17 1986-04-12 Jgc Corp 遠心分離機の洗浄
JPS6284520U (enrdf_load_stackoverflow) * 1985-11-18 1987-05-29
IT1289697B1 (it) * 1996-11-28 1998-10-16 Cornello Centrifughe S R L Estrattore centrifugo per olio di oliva
EP2799146B1 (en) * 2013-05-02 2019-11-06 Alfa Laval Corporate AB Ejection of solid particles from a centrifugal separator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US927059A (en) * 1909-02-23 1909-07-06 Frederick Laist Ore-classifier.
US3279687A (en) * 1963-05-24 1966-10-18 Bird Machine Co Centrifuge
US3348767A (en) * 1965-04-19 1967-10-24 Bird Machine Co Centrifugal separator
US3428248A (en) * 1967-09-26 1969-02-18 Combustion Eng Continuous centrifuge apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US927059A (en) * 1909-02-23 1909-07-06 Frederick Laist Ore-classifier.
US3279687A (en) * 1963-05-24 1966-10-18 Bird Machine Co Centrifuge
US3348767A (en) * 1965-04-19 1967-10-24 Bird Machine Co Centrifugal separator
US3428248A (en) * 1967-09-26 1969-02-18 Combustion Eng Continuous centrifuge apparatus

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036426A (en) * 1974-02-15 1977-07-19 Pennwalt Corporation Method of cleaning a centrifuge
US4147293A (en) * 1977-01-18 1979-04-03 Westfalia Separator Ag Continuously operating solid-jacket counterflow centrifugal extractor
US4654022A (en) * 1986-01-31 1987-03-31 Pennwalt Corporation Rinsing on a solid bowl centrifuge
US4828541A (en) * 1986-05-06 1989-05-09 Madsen Niels F Decanter centrifuge
US4978331A (en) * 1989-07-11 1990-12-18 Alfa-Laval Ab Method and apparatus for cleaning in place of a decanter centrifuge
WO1993020946A1 (en) * 1992-04-10 1993-10-28 Warman International Limited Apparatus for separating materials
US5586966A (en) * 1992-04-10 1996-12-24 Warman International Limited Apparatus and method for separating solid/fluid mixtures
US20040007137A1 (en) * 1999-01-19 2004-01-15 Hwang Yong Y. Oil treatment system
US20060091050A1 (en) * 1999-01-19 2006-05-04 Hwang Yong Y Oil treatment system
US6986733B2 (en) * 2001-10-02 2006-01-17 Westfalia Separator Industry Gmbh Solid bowl helical conveyor centrifuge with a pressurized housing
US20040185999A1 (en) * 2001-10-02 2004-09-23 Hans-Joachim Beyer Solid bowl helical conveyor centrifuge with a pressurized housing
US20050192173A1 (en) * 2004-02-07 2005-09-01 Thomas Broadbent & Sons Limited Washing of separated solids in solid bowl and screen bowl decanting centrifuges
US7448992B2 (en) * 2004-02-07 2008-11-11 Thomas Broadbent & Sons Limited Washing of separated solids in solid bowl and screen bowl decanting centrifuges
DE102005028825A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Verbesserte Zentrifugenvorrichtung zur Vermeidung von Cross-Kontamination
US8529425B2 (en) * 2007-12-07 2013-09-10 Tomoe Engineering Co., Ltd. Horizontal centrifugal separator in which the hermeticity of a casing is improved by using a sealing element having a simple structure
US20100273628A1 (en) * 2007-12-07 2010-10-28 Atsushi Onodera Horizontal centrifugal separator
US20120010065A1 (en) * 2008-11-28 2012-01-12 Alfa Laval Corporate Ab Decanter centrifuge with a hinged lid
US8235882B2 (en) * 2008-11-28 2012-08-07 Alfa Laval Corporate Ab Decanter centrifuge with a hinged lid
US8021289B2 (en) * 2009-02-20 2011-09-20 Tema Systems, Inc. Clean-in-place decanter centrifuge
US20100216623A1 (en) * 2009-02-20 2010-08-26 Vastola Michael L Clean-in-place decanter centrifuge
WO2016142059A1 (en) * 2015-03-10 2016-09-15 Ecofast Italia S.R.L. - Tecnologie Ambientali Separator for separating chopped food waste material
CN107427844A (zh) * 2015-03-10 2017-12-01 意大利速达环保技术有限责任公司 用于分离切碎食物废料的分离器
US10589294B2 (en) 2015-03-10 2020-03-17 Ecofast Italia S.R.L.—Tecnologie Ambientali Separator for separating chopped food waste material

Also Published As

Publication number Publication date
JPS48102356A (enrdf_load_stackoverflow) 1973-12-22
GB1425270A (en) 1976-02-18
FR2175862B1 (enrdf_load_stackoverflow) 1976-06-11
DE2212178A1 (de) 1973-09-20
FR2175862A1 (enrdf_load_stackoverflow) 1973-10-26
CA971531A (en) 1975-07-22
JPS5649625B2 (enrdf_load_stackoverflow) 1981-11-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FIRST NATIONAL BANK OF BOSTON, THE, MASSACHUSETTS

Free format text: SECURITY INTEREST;ASSIGNOR:BIRD MACHINE COMPANY, INC.;REEL/FRAME:005048/0923

Effective date: 19880812