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EP0806245B1 - Centrifugeuse à vis avec une vanne actionnée par la force centrifuge - Google Patents

Centrifugeuse à vis avec une vanne actionnée par la force centrifuge Download PDF

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Publication number
EP0806245B1
EP0806245B1 EP97106703A EP97106703A EP0806245B1 EP 0806245 B1 EP0806245 B1 EP 0806245B1 EP 97106703 A EP97106703 A EP 97106703A EP 97106703 A EP97106703 A EP 97106703A EP 0806245 B1 EP0806245 B1 EP 0806245B1
Authority
EP
European Patent Office
Prior art keywords
drum
centrifuge
centrifugal
valve
end wall
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
EP97106703A
Other languages
German (de)
English (en)
Other versions
EP0806245A1 (fr
Inventor
Bernward Feldkamp
Reinhold Boden
Brigitta Steden
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.)
Baker Hughes Deutschland GmbH
Original Assignee
Baker Hughes Deutschland 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 Baker Hughes Deutschland GmbH filed Critical Baker Hughes Deutschland GmbH
Publication of EP0806245A1 publication Critical patent/EP0806245A1/fr
Application granted granted Critical
Publication of EP0806245B1 publication Critical patent/EP0806245B1/fr
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
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • 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
    • 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
    • B04B2001/2083—Configuration of liquid outlets

Definitions

  • the invention relates to a centrifuge, in particular a screw centrifuge for the separation of solid-liquid mixtures with a rotatable drum jacket and one with a different one Speed rotatable screw conveyor and in the front wall of the Centrifuge drum arranged liquid discharge openings and with solids discharge openings at the other end of the centrifuge drum.
  • Solid-bowl screw centrifuges have a facility for the central Feed the solid-liquid mixture to be separated into the Centrifuge drum and outlet openings for the discharge of each other separate light and heavy fabrics.
  • the liquid freed from solids is in the front wall of the Centrifuge drum several liquid discharge openings distributed around the circumference arranged, and the other, mostly tapered
  • the end of the drum also points around the circumference at its periphery distributed discharge openings through which the from the screw conveyor transported within the drum and from the liquid largely freed solid is discharged.
  • the object of the invention is therefore to overcome these disadvantages avoid and create a screw centrifuge when starting and shutdown no more problems that occur of the one located or remaining in the centrifuge drum
  • the amount of fluid stems, especially the problem of leakage of liquid at the solids discharge openings during the shutdown process.
  • the invention is based on the idea of the above in screw centrifuges liquid ring described or remaining in the centrifuge, the during the start-up and shutdown process of the centrifuge leads to problems in the start-up and shutdown phase to disappear bring to.
  • the screw centrifuge according to the invention is namely in the drum end wall radially outside the liquid drain openings at least one drum discharge opening arranged, preferably are radially outside of the liquid drain openings several drum discharge openings evenly distributed around the circumference arranged around the centrifuge drum to be able to completely empty any remaining liquid.
  • This Drum discharge openings arranged in the drum end wall are each crossed radially by a hole in the a centrifugal valve is inserted with a spring-loaded Valve body or closure body in such a way that the closure body at high drum speed (operating speed) the drum discharge opening each closed and at low drum speed the drain opening opens.
  • the centrifugal valve of the The screw centrifuge according to the invention thus works in exactly the opposite direction such as B. return valves used in plate separators, which at high speed of the separator due to high centrifugal force and product load open the discharge openings for the difficult phase, while exactly the opposite in the screw centrifuge according to the invention with high centrifugal force, the integrated centrifugal valve closes.
  • the closure body of the centrifugal valve consist of a piston valve that into a radially inside the drum discharge opening the drilled end wall blind bore is insertable and in this under the influence of the force of a spring and that in centrifuge operation built-up centrifugal force can be moved back and forth like a piston and thereby clearing the crossing drum discharge opening or closes.
  • the spring is preferably one in the drum end wall arranged radially outside the drum discharge opening preloaded compression spring, e.g. B.
  • the drum emptying openings are under Action of the spring-loaded centrifugal valve body until it is reached a certain operating speed kept open so that starting the screw centrifuge or accelerating the rotor due to a remaining amount of liquid in the drum is not disabled.
  • the screw centrifuge according to the invention has a drum shell 10 with coaxially arranged therein with snail spirals 11 provided screw conveyor, in the same direction of rotation like the centrifuge drum 10, but with a different one Speed rotates.
  • the solid-liquid mixture to be dewatered such as B. the sewage sludge is in the centrifuge drum introduced through the central feed pipe 12.
  • FIGS. 2 to 4 there is the closure body of the centrifugal valve 18 from a piston valve 19, the after position in Fig. 2 in its bottom dead center and according to Fig. 3 in his top dead center is struck.
  • the spool 19 is in a radially inside the drum discharge opening 16 to this blind hole 17 insertable in the drum end wall and in this under the action of the force of a spring 20 and that in the centrifuge mode built-up centrifugal force can be moved back and forth like a piston, having the crossing drum emptying opening 16 according to FIG. 3 releases or closes according to FIG. 2.
  • the spring 20 is according to this Embodiment radially in the drum end wall 14 biased arranged outside the drum discharge opening 16 Compression spring, the tension force, which the counterforce to Centrifugal centrifugal force builds up, is matched to the opening speed, in which the valve spool 19 moves radially inward and the drum emptying opening 16 during the shutdown process the centrifuge releases. That is: when parking the Screw centrifuge reduces the speed of the centrifuge drum 10 to a standstill and the centrifugal force is also reduced.
  • FIGS. 2 and 3 also show that the piston rod 21 of the piston valve 19 engaging valve spring 20 with its radial outer end in a cap-shaped screw plug 22 is supported, in the end face of the drum end wall 14 from Circumference radially to the centrifuge axis is screwed.
  • the radially outer head of this cap-shaped locking screw advantageously has a through hole 23 for liquid discharge and for self-cleaning of the centrifugal valve with self-cleaning of the Coils of the coil spring 20 on.
  • the piston slide 19 of the centrifugal valve 18 has both in the lower Dead center (Fig. 2) and in top dead center (Fig. 3) a safe Stop, so that both when closed as A stable valve position even when the valve is open sets.

Landscapes

  • Centrifugal Separators (AREA)

Claims (6)

  1. Centrifugeuse notamment centrifugeuse à vis pour séparer des mélanges liquide/matières solides, comportant une enveloppe de tambour (10) montée à rotation dans laquelle tourne une vis de transfert (11) avec une vitesse de rotation différente et des orifices de sortie de liquide (13) prévus dans la paroi frontale (14) du tambour de la centrifugeuse et des orifices de sortie de matières solides à l'autre extrémité du tambour,
    caractérisée en ce que
    la paroi frontale (14) du tambour comporte radialement à l'extérieur des orifices de sortie de liquide (13), au moins un orifice d'évacuation du tambour (16), cet orifice étant traversé radialement par un perçage (17) logeant une vanne centrifuge (18) comprenant un organe d'obturation (19) chargé par un ressort, de façon que l'organe d'obturation ferme l'orifice d'évacuation du tambour (16) à une vitesse de rotation élevée du tambour, c'est-à-dire à la vitesse de rotation de fonctionnement, et ouvre cet orifice d'évacuation à une vitesse de rotation du tambour plus faible.
  2. Centrifugeuse selon la revendication 1,
    caractérisée en ce que
    l'organe d'obturation de la vanne centrifuge (18) est formé d'un tiroir-piston (19) introduit dans un perçage borgne (17) radialement à l'intérieur de l'orifice d'évacuation (16) du tambour, ce perçage partant de la paroi frontale (14) du tambour et dans ce perçage, sous l'action de la force développée par un ressort (20) et de la force centrifuge résultant du fonctionnement de la centrifugeuse, le tiroir-piston coulisse à la manière d'un piston et libère ou obture l'orifice d'évacuation (16) du tambour qu'il croise.
  3. Centrifugeuse selon la revendication 2,
    caractérisée en ce que
    le ressort (20) est un ressort de compression précontraint, logé dans un orifice d'évacuation du tambour (16), radialement à l'extérieur de la paroi frontale (14) du tambour, la force du ressort qui est la force antagoniste à la force centrifuge développée par la centrifugeuse, est définie en fonction de la vitesse de rotation d'ouverture à laquelle le tiroir-piston (19) de la vanne se déplace radialement vers l'intérieur et libère l'orifice d'évacuation (16) du tambour lors de la phase d'arrêt de la centrifugeuse.
  4. Centrifugeuse selon les revendications 2 ou 3,
    caractérisée en ce que
    le ressort (20) qui agit sur la tige (21) du tiroir-piston (19) s'appuie par son extrémité radialement extérieure dans une vis capuchon (22) d'obturation, vissée dans la face frontale de la paroi frontale (14) du tambour, et située radialement par rapport à l'axe de la centrifugeuse au niveau de la périphérie,
  5. Centrifugeuse selon la revendication 4,
    caractérisée en ce que
    la tête de la vis d'obturation en forme de capuchon (22), située radialement à l'extérieur, comporte un perçage traversant (23) pour la sortie du liquide et pour l'autonettoyage de la vanne centrifuge (18).
  6. Centrifugeuse selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que
    la paroi frontale (14) du tambour comporte plusieurs orifices d'évacuation (16) et plusieurs vannes centrifuges (18) répartis régulièrement à la périphérie.
EP97106703A 1996-05-07 1997-04-23 Centrifugeuse à vis avec une vanne actionnée par la force centrifuge Expired - Lifetime EP0806245B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19618249A DE19618249A1 (de) 1996-05-07 1996-05-07 Schneckenzentrifuge mit Fliehkraft-Ventil
DE19618249 1996-05-07

Publications (2)

Publication Number Publication Date
EP0806245A1 EP0806245A1 (fr) 1997-11-12
EP0806245B1 true EP0806245B1 (fr) 2001-06-06

Family

ID=7793552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97106703A Expired - Lifetime EP0806245B1 (fr) 1996-05-07 1997-04-23 Centrifugeuse à vis avec une vanne actionnée par la force centrifuge

Country Status (6)

Country Link
US (1) US5913767A (fr)
EP (1) EP0806245B1 (fr)
JP (1) JPH11581A (fr)
AT (1) ATE201834T1 (fr)
DE (2) DE19618249A1 (fr)
DK (1) DK0806245T3 (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650061A (en) * 1982-07-14 1987-03-17 Weyerhaeuser Company Crowding lug transfer conveyor system
DE10021983A1 (de) * 2000-05-05 2001-11-08 Baker Hughes De Gmbh Vollmantelzentrifuge zur Trennung von Feststoff-Flüssigkeitsgemischen
US7018326B2 (en) * 2000-08-31 2006-03-28 Varco I/P, Inc. Centrifuge with impellers and beach feed
US6780147B2 (en) * 2000-08-31 2004-08-24 Varco I/P, Inc. Centrifuge with open conveyor having an accelerating impeller and flow enhancer
US6605029B1 (en) 2000-08-31 2003-08-12 Tuboscope I/P, Inc. Centrifuge with open conveyor and methods of use
US6790169B2 (en) * 2000-08-31 2004-09-14 Varco I/P, Inc. Centrifuge with feed tube adapter
JP4113775B2 (ja) 2000-11-14 2008-07-09 ウエストファリア セパレーター アーゲー 分配装置を備える固体ボウルスクリュー遠心機
DE10065060B4 (de) 2000-12-27 2004-07-08 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit Tellereinsatz
DE10203652B4 (de) * 2002-01-30 2006-10-19 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit einem Wehr
US20050242003A1 (en) 2004-04-29 2005-11-03 Eric Scott Automatic vibratory separator
US8312995B2 (en) 2002-11-06 2012-11-20 National Oilwell Varco, L.P. Magnetic vibratory screen clamping
US8172740B2 (en) 2002-11-06 2012-05-08 National Oilwell Varco L.P. Controlled centrifuge systems
US20060105896A1 (en) * 2004-04-29 2006-05-18 Smith George E Controlled centrifuge systems
US7540837B2 (en) * 2005-10-18 2009-06-02 Varco I/P, Inc. Systems for centrifuge control in response to viscosity and density parameters of drilling fluids
US7540838B2 (en) * 2005-10-18 2009-06-02 Varco I/P, Inc. Centrifuge control in response to viscosity and density parameters of drilling fluid
US20080083566A1 (en) 2006-10-04 2008-04-10 George Alexander Burnett Reclamation of components of wellbore cuttings material
US8622220B2 (en) 2007-08-31 2014-01-07 Varco I/P Vibratory separators and screens
US9073104B2 (en) 2008-08-14 2015-07-07 National Oilwell Varco, L.P. Drill cuttings treatment systems
US9079222B2 (en) 2008-10-10 2015-07-14 National Oilwell Varco, L.P. Shale shaker
US8556083B2 (en) 2008-10-10 2013-10-15 National Oilwell Varco L.P. Shale shakers with selective series/parallel flow path conversion
SE534386C2 (sv) 2009-10-29 2011-08-02 Alfa Laval Corp Ab Centrifugalseparator samt metod för separering av fasta partiklar
US9643111B2 (en) 2013-03-08 2017-05-09 National Oilwell Varco, L.P. Vector maximizing screen
DE102014101205B4 (de) 2014-01-31 2021-08-05 Flottweg Se Auslassvorrichtung einer Vollmantelschneckenzentrifuge
DE202022100680U1 (de) 2022-02-07 2023-05-11 Gea Westfalia Separator Group Gmbh Separator
CN116459955A (zh) * 2023-06-02 2023-07-21 江苏华大离心机制造有限公司 离心分离转鼓及离心分离设备

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Publication number Priority date Publication date Assignee Title
GB297914A (en) * 1927-07-26 1928-10-04 Sunderland Forge & Engineering Improvements in and relating to centrifugal separators
US2022815A (en) * 1933-09-27 1935-12-03 Laval Separator Co De Centrifugal bowl for separating heavy sludge and solids from lighter liquids
GB574667A (en) * 1943-07-13 1946-01-15 Separator Ab A centrifugal bowl for separating sludge-containing liquids
GB1066541A (en) * 1962-12-19 1967-04-26 English Electric Co Ltd Apparatus for supplying electric current from an a.c. supply to a load at a low frequency
SE371110B (fr) * 1973-03-22 1974-11-11 Alfa Laval Ab
AT381718B (de) * 1982-01-20 1986-11-25 Voest Alpine Ag Rotierendes spaltsieb zum trocknen von feststoffen, z.b. braunkohlen
DE4130759A1 (de) * 1991-09-16 1993-03-18 Flottweg Gmbh Zentrifuge zur kontinuierlichen trennung von stoffen unterschiedlicher dichte

Also Published As

Publication number Publication date
DE59703712D1 (de) 2001-07-12
DK0806245T3 (da) 2001-09-17
ATE201834T1 (de) 2001-06-15
DE19618249A1 (de) 1997-11-13
JPH11581A (ja) 1999-01-06
US5913767A (en) 1999-06-22
EP0806245A1 (fr) 1997-11-12

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