EP2872256B1 - Vollmantel-schneckenzentrifuge mit überlaufwehr - Google Patents

Vollmantel-schneckenzentrifuge mit überlaufwehr Download PDF

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Publication number
EP2872256B1
EP2872256B1 EP13736864.3A EP13736864A EP2872256B1 EP 2872256 B1 EP2872256 B1 EP 2872256B1 EP 13736864 A EP13736864 A EP 13736864A EP 2872256 B1 EP2872256 B1 EP 2872256B1
Authority
EP
European Patent Office
Prior art keywords
solid
screw centrifuge
bowl screw
guide plate
recess
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.)
Active
Application number
EP13736864.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2872256A1 (de
Inventor
Ludger HORSTKÖTTER
Jürgen HERMELER
Stefan Terholsen
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
GEA Mechanical Equipment 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 GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Priority to PL13736864T priority Critical patent/PL2872256T3/pl
Publication of EP2872256A1 publication Critical patent/EP2872256A1/de
Application granted granted Critical
Publication of EP2872256B1 publication Critical patent/EP2872256B1/de
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Anticipated expiration legal-status Critical

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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
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous 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
    • B04B2001/2075—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 with means for recovering the energy of the outflowing liquid
    • 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 solid bowl screw centrifuge according to the preamble of claim 1.
  • Solid bowl screw centrifuges are known in various embodiments.
  • Nozzles on solid bowl centrifuges and their effect of saving energy with an appropriate orientation inclined to the drum axis are also from the DE 39 04 151 A1 known.
  • They are designed, for example, as flat sheets, which are aligned parallel to the axis of rotation of the drum, the plane in which the flat sheets lie, does not intersect the axis of the drum and encloses an angle of approximately 45 ° with the radial straight line, which in each case through the axis of rotation of the drum and the respective passage opening runs.
  • the weir plate has a material recess which forms at least part of a discharge channel or a complete discharge channel, the discharge channel being designed in such a way that it deflects flow emerging from the drum in a suitable manner.
  • the object of the invention is to solve the problem described above.
  • the bottom of the discharge channel is inclined toward the overflow edge relative to the tangential direction by an angle of inclination ⁇ > 0 ° at the location of the overflow edge inwards towards the axis of rotation.
  • a main advantage of this configuration is again that, as in the case of the type of WO 2008/138345 A1 can easily form product deposits. This disadvantage is avoided again by the open design of the drainage channels. The design is simple and stable. In addition, the emerging product stream is deflected to a radial diameter in such a way that a particularly large amount of energy is saved.
  • angle of inclination ⁇ ⁇ > 0 ° and ⁇ ⁇ 25 °, in particular ⁇ 10 10 ° and ⁇ 20 20 °, since a particularly advantageous outflow behavior can be achieved in this way.
  • Fig. 2 should clarify the basic structure of a solid bowl screw centrifuge.
  • the drive along with the control, a hood and other elements that are self-evident to the person skilled in the art are not shown here.
  • Fig. 2 shows a solid bowl screw centrifuge 1 with a drum 3 rotatable about an axis of rotation D, in which a likewise rotatable screw 5 is arranged.
  • Radial directions perpendicular to the axis of rotation D are denoted by "R".
  • the drum 3 and the screw 5 each have an essentially cylindrical section and a section which tapers conically here.
  • An axially extending central inlet pipe 7 serves to feed the centrifuged material via a distributor 9 into the centrifugal chamber 11 between the screw 5 and the drum 3.
  • the screw 5 preferably rotates at a somewhat lower or greater speed than the drum 3 and conveys the ejected solid to the conical section from the drum 3 to the solid discharge 13.
  • the liquid flows to the larger drum diameter at the rear end of the cylindrical section of the drum 3 and is derived there by a weir which has passage openings 15 in a drum cover 17, each passage opening 15 being assigned a weir plate 19, which is attached here radially adjustable to the outside of the drum cover.
  • the inner radial edge of the weir plate 19 thus defines an overflow edge and thus also the actual weir or the overflow weir 21.
  • the liquid flows out of the drum at the overflow weir 21, which rotates in the circumferential direction U with the drum 1, so that the liquid which flows in Direction X parallel to the axis of rotation D flows over the overflow weir 21, in addition to the axial speed component as a result of the outflow from the drum, in particular also a speed in the circumferential direction U (perpendicular to the image plane of FIG Fig. 1 , see also Fig. 2 ) and a radial component caused by the centrifugal force from the center of rotation to the outside.
  • the drum lid with drain weirs 23 in the manner of Fig. 1 are provided, which replace the weir plate 19, in particular in order to achieve energy savings.
  • the drain weirs 23 each in turn each have a flange-like weir plate 25 which is arranged on the drum cover.
  • the weir plates 25 are provided with holes 27 for attachment to the drum cover 17 in order to screw the respective weir plate to the drum cover 17 by means of bolts (not shown here).
  • This attachment is simple and preferred. However, other types of attachment of the weir plate (s) 25 to the drum cover are also conceivable.
  • the weir plate 25 is designed as a ring segment, it being advantageous (but not absolutely necessary) - in particular in order to avoid quiet running by avoiding gaps and the like. - if the ring segments lie directly or very close to one another in the circumferential direction and are in such a manner circumferential ring from the weir plates 25 forms.
  • the weir plate (s) 25 can also have a different shape, for example a rectangular or a semicircular shape.
  • the 1a-c only show one of the weirs 23.
  • Each weir plate 25 as the base of the drain weir has - with respect to the axis of rotation D - an inner edge 25a and an outer edge 25b in the form of a section of a circular arc and two circumferential edges 25c and 25d which are oriented radially to the axis of rotation D here.
  • This configuration is also advantageous because a circumferential ring can easily be formed, but not necessarily.
  • a recess 29 is formed, which extends from the inner edge 25a - based on the mounted state on the drum cover 17 - to the outside and ends radially a little before the outer edge 25b.
  • the recess 29 has a first edge section 29a which extends preferably radially or at a small angle relative to the radial (angle ⁇ preferably less than 25 °) and a second edge section which is preferably oriented perpendicularly or substantially perpendicularly to the first edge section 29a 29b, which preferably runs tangentially or essentially tangentially (angle to the tangential direction 0 ° or less than 20 °) to an imaginary circle with a radius r b to the axis of rotation D.
  • At least the edge section 29b is preferably aligned with a corresponding opening in the actual drum cover located under the weir plate 25 (not shown here; however, see Fig. 1 ).
  • the edge section 29b essentially forms the overflow edge, via which liquid emerges axially from the drum.
  • the side of the second edge section 29b facing away from the first edge section 29a is preferably adjoined by a (third) edge section 29c which is at an obtuse angle relative to the second edge section, and is preferably followed by a fourth edge section 29d, which here is arc-shaped and the third edge section with the circular arc Inner edge 25a of the weir plate 25 connects.
  • a (third) edge section 29c which is at an obtuse angle relative to the second edge section
  • a fourth edge section 29d which here is arc-shaped and the third edge section with the circular arc Inner edge 25a of the weir plate 25 connects.
  • a drainage channel is also formed at the recess 29, which is open radially inwards (towards the axis of rotation) and which has a bottom and two side walls, one of which is formed from a guide plate piece 31a is and a part of the weir plate 25 itself.
  • baffle piece 31a and two baffle pieces 31b, c forming the bottom serve, in combination with the weir plate 25, to deflect a liquid stream emerging axially from the drum through the recess 29 essentially in the direction of the direction of rotation K in the direction K, which as a result of the the deflection resulting additional drive effect in the circumferential direction leads to an energy-efficient operation.
  • the guide plate pieces 31a, b and / or c can also be formed as sections of a single superordinate and correspondingly bent or cast guide plate, or can be connected to one another, for example by welding.
  • the three guide plate pieces 31a, b, c and the weir plate 25 together form the discharge channel open towards the axis of rotation D.
  • the first baffle piece 31a is preferably formed at right angles to the second and third baffle pieces 31b, c. It not only forms the side wall of the drainage channel, but also ensures the actual deflection of the liquid jet from the axial direction X into a circumferential direction perpendicular thereto - K.
  • the first guide plate piece 31a as the side wall of the drainage channel, directly adjoins the first edge section 29a of the recess 29 with its side or surface facing the drum.
  • the angle ⁇ between the plane of the weir plate 25 as the base plate and the first guide plate piece 31a preferably 0 ° or greater than 0 ° and less than 45 °, preferably should be less than or equal to 15 ° (see Fig. 1c ).
  • the reference edge for the angle ⁇ is perpendicular to the weir plate and is measured on the inner edge of the baffle piece and the weir plate.
  • the first baffle piece 31a has the radius or the bend 31a "and then extends in the section 31a"'' preferably up to parallel or preferably slightly inclined towards the weir plate.
  • the angle ⁇ is formed, for which applies: ⁇ > 0 ° and ⁇ ⁇ 30 °, in particular ⁇ ⁇ 20 °.
  • the baffle piece 31a can thus again have a plurality of sections or even individual pieces or components.
  • the baffle piece here has a flat section 31a ', a radius 31a "and an adjoining flat section 31a"'.
  • the radius is particularly important since it mainly causes the deflection, so that the first baffle piece even up to a radius or curved section could also be reduced.
  • the first baffle piece 31a also adjoins the second and third baffle pieces 31b, c as the side wall of the gutter, which form the bottom of the gutter.
  • the second and third baffle pieces 31b, c are preferably perpendicular or substantially perpendicular (angle between 90 ° and 110 °) to the plane of the drum cover or weir plate 25 (which is perpendicular to the axis of rotation) and on the outside of the weir plate 25 ( arranged in the assembled position on the drum) and preferably material-connecting (eg welded).
  • the second guide plate piece 31b is preferably aligned with the second edge end section 29b.
  • the third baffle piece 31c is aligned with the third edge section 29c, but is longer than the third edge section 29c and preferably deflects the emerging liquid jet from the tangential direction somewhat inwards towards the axis of rotation.
  • the corresponding angle ⁇ between the tangential direction T and the outflow direction A from the bottom of the drainage channel - here from the third baffle piece 31c - to the axis of rotation is preferably greater than 0 ° and less than 25 °.
  • the baffle pieces can be sections of a sheet or separate sheet metal elements. Again, they can each consist of several subsegments or pieces or be divided into such.
  • Liquid emerging from the drum is deflected by the first baffle piece 31a in the circumferential direction of the drum and against the direction of rotation K of the drum.
  • An angle ⁇ of the overflow edge can be 0 ° to the radial R or up to ⁇ 10 °, preferably ⁇ 5 °.
  • the base - formed here from the first and the second baffle piece 31b, c - of the inwardly open drainage channel prevents the deflected liquid from splashing outwards. Rather, the bottom ensures that the liquid jet is passed on in the circumferential direction to the end of the bottom of the drainage channel, where the liquid jet leaves the drainage channel in direction A at the drainage edge / overflow edge 31 h.
  • the liquid jet deflected in the circumferential direction is first guided essentially tangentially through the bottom of the drainage channel - here through the second guide plate piece 31b - and then through the third guide plate piece 31c oriented at an obtuse angle even from the tangential direction T to the axis of rotation and leaves the third Baffle piece 31c in the direction defined by the orientation of this baffle piece 31c, whereby the energy gain is particularly large.
  • a single drainage channel and a single recess 29 are preferably formed on each weir plate. However, several drainage channels and recesses 29 can also be formed on a single weir plate.
  • baffle piece 31 is not to be understood too narrowly. These preferably each consist of a section of a metal sheet. However, in the sense of this application, “guide plate pieces” made of non-metallic materials are also conceivable, provided that these are suitable for performing the necessary deflecting and guiding function for the liquid.
  • the area of the recess 29 up to the inner edge 25a of the weir plate 25 should preferably be smaller, in particular 25% or more smaller, preferably 30% smaller, than the imaginary cross section - the imagined cross-sectional area - of the drainage channel in the area of the overflow edge (which can essentially be calculated as the product of the floor width with the height of the discharge channel), which is defined by the height of the baffle piece 31a in the area of the overflow edge 31 h.
  • the area or cross-section of the recess 29 should preferably be equal to or larger than the imaginary cross-section of the discharge channel at the overflow edge, since this again results in excellent outflow behavior.

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  • Centrifugal Separators (AREA)
EP13736864.3A 2012-07-11 2013-07-05 Vollmantel-schneckenzentrifuge mit überlaufwehr Active EP2872256B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13736864T PL2872256T3 (pl) 2012-07-11 2013-07-05 Wirówka sedymentacyjna ze ślimakowym urządzeniem wyładowującym bez przegród perforowanych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012106226.9A DE102012106226A1 (de) 2012-07-11 2012-07-11 Vollmantel-Schneckenzentrifuge mit Überlaufwehr
PCT/EP2013/064255 WO2014009272A1 (de) 2012-07-11 2013-07-05 Vollmantel-schneckenzentrifuge mit überlaufwehr

Publications (2)

Publication Number Publication Date
EP2872256A1 EP2872256A1 (de) 2015-05-20
EP2872256B1 true EP2872256B1 (de) 2020-01-15

Family

ID=48790418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13736864.3A Active EP2872256B1 (de) 2012-07-11 2013-07-05 Vollmantel-schneckenzentrifuge mit überlaufwehr

Country Status (8)

Country Link
US (1) US10252277B2 (zh)
EP (1) EP2872256B1 (zh)
CN (1) CN104470639B (zh)
DE (1) DE102012106226A1 (zh)
PL (1) PL2872256T3 (zh)
RU (1) RU2636706C2 (zh)
SG (1) SG11201500183QA (zh)
WO (1) WO2014009272A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2732622C (en) * 2008-08-15 2016-01-12 M-I Llc Changeable weir inserts for a centrifuge
DE102012106226A1 (de) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr
DE102013001436A1 (de) * 2013-01-29 2014-07-31 Flottweg Se Vollmantelschneckenzentrifuge mit einer Wehrkante
DE102014104296A1 (de) * 2014-03-27 2015-10-01 Flottweg Se Auslassvorrichtung einer Vollmantelschneckenzentrifuge
DE102014108722A1 (de) 2014-04-30 2015-11-05 Hiller Gmbh Schneckenzentrifuge
RU2649448C1 (ru) * 2017-01-17 2018-04-03 Георгий Петрович Трошин Центрифуга осадительная
KR102010873B1 (ko) * 2019-04-11 2019-08-14 (주)종합해사 스크류 데칸터형 원심분리기의 오리피스 구조

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SU100941A1 (ru) * 1952-07-04 1954-11-30 Б.М. Полуянов Горизонтальна отстойна центрифуга непрерывного действи
DE3904151A1 (de) 1989-02-11 1990-08-16 Heckmann Wolfgang Zentrifuge
US5147277A (en) * 1991-03-19 1992-09-15 Baker Hughes Incorporated Power-efficient liquid-solid separating centrifuge
JP3543597B2 (ja) 1997-12-22 2004-07-14 株式会社クボタ 横型遠心分離機における分離水の排出装置
JPH11197547A (ja) * 1998-01-13 1999-07-27 Kubota Corp 横型遠心分離機における分離水の排出装置
DE10203652B4 (de) 2002-01-30 2006-10-19 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit einem Wehr
US20040072668A1 (en) 2002-10-15 2004-04-15 Baker Hughes Incorporated Liquid phase discharge port incorporating chamber nozzle device for centrifuge
US7022061B2 (en) * 2002-10-15 2006-04-04 Andritz Ag Centrifuge discharge port with power recovery
DE202004005353U1 (de) * 2004-04-06 2005-08-18 Westfalia Separator Ag Vollmantelzentrifuge mit einem Wehr mit einer Drosselscheibe
DE102005027553A1 (de) * 2005-06-14 2006-12-28 Westfalia Separator Ag Drei-Phasen-Vollmantel-Schneckenzentrifuge und Verfahren zur Regelung des Trennprozesses
DK176946B1 (da) 2007-05-09 2010-06-14 Alfa Laval Corp Ab Centrifugalseparator og et væskefaseafløbsportelement
CA2732622C (en) * 2008-08-15 2016-01-12 M-I Llc Changeable weir inserts for a centrifuge
DE102010032503A1 (de) * 2010-07-28 2012-02-02 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr
DE102010061563A1 (de) 2010-12-27 2012-06-28 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr
DK2551021T3 (da) * 2011-07-29 2017-01-02 Andritz Sas Centrifuge og udløbsåbningselement til en centrifuge for effektreduktion
DE102012106226A1 (de) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr
DE102012014563B4 (de) * 2012-07-23 2014-12-11 Flottweg Se Vollmantelschneckenzentrifuge mit einer Energierückgewinnungseinrichtung
DE102013001436A1 (de) * 2013-01-29 2014-07-31 Flottweg Se Vollmantelschneckenzentrifuge mit einer Wehrkante
EP2789395B2 (de) * 2013-04-08 2019-11-06 Flottweg SE Vollmantelschneckenzentrifuge mit einer Energierückgewinnungseinrichtung
DE102014104296A1 (de) * 2014-03-27 2015-10-01 Flottweg Se Auslassvorrichtung einer Vollmantelschneckenzentrifuge

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
US20150165449A1 (en) 2015-06-18
PL2872256T3 (pl) 2020-06-29
CN104470639A (zh) 2015-03-25
CN104470639B (zh) 2017-03-08
US10252277B2 (en) 2019-04-09
DE102012106226A1 (de) 2014-01-16
SG11201500183QA (en) 2015-04-29
EP2872256A1 (de) 2015-05-20
RU2636706C2 (ru) 2017-11-27
RU2015103884A (ru) 2016-08-27
WO2014009272A1 (de) 2014-01-16

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