EP0322516A2 - Centrifuge à bol plein - Google Patents

Centrifuge à bol plein Download PDF

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Publication number
EP0322516A2
EP0322516A2 EP88115690A EP88115690A EP0322516A2 EP 0322516 A2 EP0322516 A2 EP 0322516A2 EP 88115690 A EP88115690 A EP 88115690A EP 88115690 A EP88115690 A EP 88115690A EP 0322516 A2 EP0322516 A2 EP 0322516A2
Authority
EP
European Patent Office
Prior art keywords
drum
discharge
centrifuge
compressed air
centrifuge according
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.)
Withdrawn
Application number
EP88115690A
Other languages
German (de)
English (en)
Other versions
EP0322516A3 (fr
Inventor
Wolfgang Epper
Hans-H. Dr. Gildemeister
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0322516A2 publication Critical patent/EP0322516A2/fr
Publication of EP0322516A3 publication Critical patent/EP0322516A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B04B2001/2091—Configuration of solids outlets

Definitions

  • the invention relates to a full-fledged centrifuge, in particular for separating media of different densities or their mixtures and / or suspensions that are difficult to separate into a comparatively lighter and at least one heavier phase, with a drum rotatably mounted on a shaft and a cylindrical clarifying pond in itself and with Organs for entering the media to be separated and for discharging the separated phases.
  • centrifuges of this type for. B. from DE-OS 33 17 047 known, in which along the clarification pond at a distance from the inner wall of the drum a rotatably mounted with a hollow shaft and extending in the direction of the axis of rotation arranged displacement body, and the centrifuge is designed with means for operation in direct current , wherein the entry element for the medium to be separated is arranged at the inflow area of the clarification pond and the discharge elements for the separate phases are arranged starting from the discharge area.
  • German utility model 84 60 004.7 proposes an overflow separation centrifuge for the separation treatment of sludge with a liquid discharge tube protruding into the drum and having a sleeve at the free end, the sleeve being adjustable to skim off a phase at different depths in the sedimentation pond.
  • Such a device is very difficult to operate and also prone to failure.
  • Another known centrifuge according to DE-OS 26 51 657 has a clear liquid overflow at a point between the inlet and the solids discharge, the overflow member consisting of a plurality of tubes projecting radially from the outside into the clarification chamber.
  • the accumulation height can be adjusted by letting the tubes protrude more or less far into the clarification room.
  • a solid-bowl screw centrifuge of cylindrical design for separating suspensions which are difficult to separate which has a separating disc at the end of the separating space and clear-phase channels arranged in front of the separating disc and sediment channels behind the separating disc. Both discharges lead out of the centrifuge drum in the area of the center thereof.
  • a measuring cell for determining the dry matter content is arranged in the sediment discharge and controls a quantity control element in the clear phase discharge line in accordance with the constant solids content in the sediment.
  • the known device requires a supply of the suspension with pressure between 0.4 to 0.6 MPa and thus a sealing of the bearings.
  • the object of the invention is to provide a centrifuge of the type mentioned, in which the phases separation difficult to separate z.
  • B. sewage sludge largely avoiding energy losses and without a complicated design of the centrifuge as well as avoiding overpressure operation and with a simple control of the solids content in phases containing different solids, and which can be created with as little effort as possible in manufacturing, assembly and maintenance costs and with economic energy expenditure is operable.
  • the suspension to be separated is guided precisely with regard to maximum selectivity.
  • the arrangement of the displacement body ensures that a large surface of the clarification pond corresponding to the diameter of the displacement body is retained in the sedimentation area, whereas the entry and the discharge area of the media is comparatively closely associated with the center of rotation. This saves drive energy and ensures energy-efficient operation.
  • the conveying device is designed as a compressed air liquid lifter based on the principle of the so-called mammoth pump and is connected to a compressed air line which is guided through the hollow shaft into the interior of the drum.
  • the compressed air liquid lifter advantageously has a very simple embodiment, requires no moving parts, is uncomplicated, effective in terms of the conveying effect and, in particular, controllable within predetermined limits with regard to the conveying capacity.
  • FIG. 1 shows the solid bowl centrifuge (40) with a drum (2) mounted on hollow shafts (41a, 41b) on both sides in the bearing blocks (42a, 42b). Inside the drum (2) there is a hollow displacement body (6) immersed in the clarification pond (3). This is also rotatably supported on both sides on the hollow shafts (43a) and (43b) in the bearing blocks (42a) and (42b).
  • the centrifuge (40) suspension indicated by the arrow (44), is fed through the hollow shaft (43a).
  • the suspension (44) exits through the openings (45) in the hollow shaft (43) and enters the interior of the drum (2) and forms the clarification pond (3) there during operation.
  • the hollow shaft (41a) of the drum (2) has a V-belt pulley (26) for driving and the hollow shaft (43a) of the displacement body has a V-belt pulley (25). 2, in cooperation with the V-belt sweater (27) of the drive motor (28), form a differential V-belt drive (24) for the centrifuge (40).
  • the jacket (1) of the drum (2) is preferably formed with a conical extension (4) in the flow direction of the clarifying pond (3).
  • the suspension entering the artificial gravity field through the openings (45) on the left-hand side according to FIG. 1 becomes an acceleration component for the content particles of the heavier phase in the flow direction (10) granted.
  • the particles obviously have the tendency to migrate to the right in the clarification pond (3) to the area of the largest drum diameter and thereby sediment.
  • the centrifuge (40) works in direct current while maintaining optimal separation sharpness conditions, the displacement body (6), designed as a smooth truncated cone, not causing disturbing eddies or a counterflow field at any point in the clarifying pond (3).
  • the discharge element (8) for the light phase (14) leads to an overflow (8a) on the drum end wall (16) and the discharge element (9) for the heavier phase (13) from the deepest area ( 17) of the clarification pond (3), starting with a conveying device (18), and arranged to open into the hollow shaft (43b).
  • This conveying device (18) is designed as a compressed air liquid lifter (37a, 37b) and connected to a compressed air line (19) which is guided through the hollow shaft (43b) into the interior of the drum (2).
  • the arrangement is surprisingly simple, at the same time functionally reliable and energetically economical.
  • the conical widening (4) of the jacket (1) of the drum (2) with an opening angle ( ⁇ 1) between 1 ° and 8 °, preferably between 3 ° and 5 ° and the ver is advantageous thrust body (6) with a rotationally symmetrical jacket (20) in the form of a truncated cone with an opening angle ( ⁇ 2) which essentially corresponds to the opening angle ( ⁇ 1) of the drum shell (1).
  • An expedient embodiment of the centrifuge further provides that the displacement body (6) has clearing elements (21).
  • Such batches are preferably formed during the dewatering of viscous, pasty sludge, in particular sewage treatment plant sludge.
  • the clearing elements (21) are two clearing strips standing vertically opposite one another on the jacket (20) in the embodiment shown as an example. Through this the accumulation of the solid-liquid mixture Solids in the area of the inner drum wall (5) kept in motion so that they cannot get stuck.
  • Each broach (21a, 21b) can be designed as a helix with a very large pitch with a pitch angle ( ⁇ ) with respect to the axis of rotation (x-x) of the system between 0 and 10 °, preferably between 3 and 5 °. This measure supports and evenens the transport of the solids in the centrifuge drum (2) to the solids discharge end (15).
  • the small difference in rotational speed between the displacement body (6) with clearing elements (21a, 21b) compared to the drum (2), in contrast to the transport of solids by means of a helix, requires only a negligibly small amount of drive energy.
  • this drive can be designed very simply, preferably as a V-belt drive.
  • the hollow shaft (43a) of the displacement body (6) has a first V-belt pulley (25) and the hollow drive shaft (41a) of the drum (2) has a second V-belt pulley (26).
  • a further reduction in the drive power required for the system of the centrifuge (40) can also be achieved by arranging flow guide elements (51, 52) in the interior of the drum (2), for example in the form of curved blades in the manner of a radial pump or turbine impeller are through which kinetic energy is converted into potential energy, and vice versa.
  • This known arrangement improves the economic operation of the centrifuge.
  • the discharge (31) of the heavier phase (13) can be assigned a measuring device (29) for determining the solids content and via a signal line (30) and a computer unit (35) and a control line (36) can be assigned to a quantity control element (32a, 32b) in the compressed air line (19) of the compressed air liquid lifter (37), which is connected to the control element (32a) of the compressed air quantity regulator (32b) via the control line (36) is.
  • the compressed air generation system has a compressed air pump (38) with a motor (38a). Via the control device (29, 35, 32) the discharge amount of the solid phase (13) is influenced in accordance with a predetermined delivery characteristic of the compressed air liquid lifter (37) so that its solids content remains constant.
  • a coarse material separator (34) is connected upstream of the entry element (43a, 45).
  • the suspension (44) is, for example, from a storage container (39) with the line (48) through the feed pump (49) and a switchable valve bank (50a, 50b) alternately through filter (33a) or filter (33b) into the centrifuge (40 ) fed.
  • the tandem arrangement enables two-way operation, whereby the filter that is not in operation can be cleaned without interrupting operation and then switched on again in the inlet.

Landscapes

  • Centrifugal Separators (AREA)
EP88115690A 1987-12-24 1988-09-23 Centrifuge à bol plein Withdrawn EP0322516A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3744093 1987-12-24
DE19873744093 DE3744093A1 (de) 1987-12-24 1987-12-24 Vollmantelzentrifuge

Publications (2)

Publication Number Publication Date
EP0322516A2 true EP0322516A2 (fr) 1989-07-05
EP0322516A3 EP0322516A3 (fr) 1990-04-25

Family

ID=6343599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115690A Withdrawn EP0322516A3 (fr) 1987-12-24 1988-09-23 Centrifuge à bol plein

Country Status (4)

Country Link
US (1) US4898571A (fr)
EP (1) EP0322516A3 (fr)
JP (1) JPH01203063A (fr)
DE (1) DE3744093A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110388465A (zh) * 2019-07-26 2019-10-29 浙江轻机实业有限公司 一种双级推料离心机反渗漏密封方法

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104483A1 (de) * 1991-02-14 1992-08-20 Kloeckner Humboldt Deutz Ag Verfahren zum betreiben einer schneckenzentrifuge und zentrifuge hierfuer
BR9306216A (pt) * 1992-04-10 1998-06-23 Warman Int Ltd Aparelho e processo para separar materiais em um componente mais pesado e um componente mais leve
DE4231063A1 (de) * 1992-09-17 1994-03-24 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge zum Klären oder Trennen eines Flüssigkeits-Feststoffgemisches
US7479123B2 (en) 2002-03-04 2009-01-20 Therakos, Inc. Method for collecting a desired blood component and performing a photopheresis treatment
US7211037B2 (en) * 2002-03-04 2007-05-01 Therakos, Inc. Apparatus for the continuous separation of biological fluids into components and method of using same
DE10223802B4 (de) * 2002-05-29 2005-06-09 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge
DE10336350B4 (de) * 2003-08-08 2007-10-31 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge, mit Schälscheibe
US20050049539A1 (en) * 2003-09-03 2005-03-03 O'hara Gerald P. Control system for driving fluids through an extracorporeal blood circuit
US7476209B2 (en) 2004-12-21 2009-01-13 Therakos, Inc. Method and apparatus for collecting a blood component and performing a photopheresis treatment
US7603839B2 (en) * 2005-12-22 2009-10-20 Pratt & Whitney Canada Corp. Scavenge pump system and method
GB0621614D0 (en) * 2006-10-31 2006-12-06 Mozley Ltd Improvements in and relating to solids sparators
US8771160B2 (en) * 2008-01-31 2014-07-08 F. P. Marangoni Inc. Gas injection-aided centrifugal separation of entrained solids from a solution
BR112012032025A2 (pt) * 2010-06-15 2016-11-08 Michael Kopper máquina
US9321058B2 (en) * 2010-07-01 2016-04-26 Centrisys Corp. Centrifugal liquid separation machine to efficiently flow multi-phase solids from a heavy phase discharge stream with a solids plow
WO2013000072A1 (fr) * 2011-06-29 2013-01-03 The University Of British Columbia Procédé et appareil permettant le fractionnement continu de particules contenues à l'intérieur d'un fluide viscoplastique
GB201321250D0 (en) 2013-12-02 2014-01-15 Gm Innovations Ltd An apparatus for removing impurities from a fluid stream
GB201703110D0 (en) 2017-02-27 2017-04-12 Gm Innovations Ltd An apparatus for seperating components of a fluid stream
GB2572331B (en) * 2018-03-26 2022-03-09 Gm Innovations Ltd An apparatus for separating components of a fluid stream
GB2606484A (en) 2018-04-24 2022-11-09 Gm Innovations Ltd An apparatus for producing potable water
CN109046794A (zh) * 2018-08-13 2018-12-21 贵州开磷机电装备工程有限责任公司 一种卧螺机内部的特殊密封装置
CN109320041B (zh) * 2018-10-22 2023-04-18 长沙理工大学 一种泥浆处理系统
DE102023121127A1 (de) * 2023-08-08 2025-02-13 Gea Westfalia Separator Group Gmbh Vollmantel-Zentrifuge
DE102023126610A1 (de) * 2023-09-29 2025-04-03 Gea Westfalia Separator Group Gmbh Vollmantel-Zentrifuge

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795361A (en) * 1972-09-06 1974-03-05 Pennwalt Corp Centrifuge apparatus
DD205825A1 (de) * 1982-05-28 1984-01-11 Dietrich Eichler Vollmantel-schneckenzentrifuge
DE3335873A1 (de) * 1983-07-25 1985-02-21 Klöckner-Humboldt-Deutz AG, 5000 Köln Vollmantel-schneckenzentrifuge zur trennung eines feststoff-fluessigkeitsgemisches
US4566873A (en) * 1984-03-28 1986-01-28 Kotobuki Engineering & Manufacturing Co., Ltd. Screw decanter type centrifugal concentrating machine
DE3608664A1 (de) * 1986-03-14 1987-09-17 Krauss Maffei Ag Vollmantelzentrifuge
AU607750B2 (en) * 1987-04-21 1991-03-14 Robert Edward High Decanter centrifuge incorporating airlift device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110388465A (zh) * 2019-07-26 2019-10-29 浙江轻机实业有限公司 一种双级推料离心机反渗漏密封方法

Also Published As

Publication number Publication date
DE3744093A1 (de) 1989-07-13
EP0322516A3 (fr) 1990-04-25
US4898571A (en) 1990-02-06
JPH01203063A (ja) 1989-08-15

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