EP2551019B2 - Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage - Google Patents

Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage Download PDF

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Publication number
EP2551019B2
EP2551019B2 EP11006261.9A EP11006261A EP2551019B2 EP 2551019 B2 EP2551019 B2 EP 2551019B2 EP 11006261 A EP11006261 A EP 11006261A EP 2551019 B2 EP2551019 B2 EP 2551019B2
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EP
European Patent Office
Prior art keywords
outlet channel
solid bowl
bowl screw
centrifuge
centrifuge drum
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
EP11006261.9A
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German (de)
English (en)
Other versions
EP2551019A1 (fr
EP2551019B1 (fr
Inventor
Manfred Schlarb
Benno Vielhuber
Wieland Zaglauer
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.)
Flottweg SE
Original Assignee
Flottweg SE
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
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Application filed by Flottweg SE filed Critical Flottweg SE
Priority to DK11006261.9T priority Critical patent/DK2551019T4/da
Priority to DK13178930.7T priority patent/DK2659985T4/da
Priority to EP13178930.7A priority patent/EP2659985B2/fr
Priority to EP11006261.9A priority patent/EP2551019B2/fr
Publication of EP2551019A1 publication Critical patent/EP2551019A1/fr
Application granted granted Critical
Publication of EP2551019B1 publication Critical patent/EP2551019B1/fr
Publication of EP2551019B2 publication Critical patent/EP2551019B2/fr
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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
    • B04B2001/2075—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 with a rotatable about a longitudinal axis centrifuge drum having at least one outlet opening for discharging clarified Good from the centrifuge drum via a flowing from the outflow Good and a discharge passage for discharging the entire omitted Good, wherein the weir edge on the The end face of the centrifuge drum is arranged and the outlet channel extends in the flow direction behind the weir edge, the outlet channel is curved to redirect the effluent Good in a substantially tangential direction, and the outlet channel has a bottom surface which is at least partially planar design.
  • a solid bowl screw centrifuge is particularly in post-published WO 2012 089492 A1 described.
  • Out JP 11 197547 A is a solid bowl centrifuge known in which a baffle is provided which deflects the outflowing material from the axial flow direction radially outward.
  • the baffle is radially outward open.
  • Out JP 11 179236 A is a Vollmantelzentrifuge known with wing plates, which are triggered by the outflowing good in flight
  • the invention has for its object to provide a solid bowl screw centrifuge, in which the energy recovery due to a pulse return of the outflowing Guts is provided particularly cost effective and at the same time particularly effective.
  • a solid bowl screw centrifuge with a rotatable about a longitudinal axis centrifuge drum having at least one outlet opening for discharging clarified Good from the centrifuge drum via a flowing from the outflow Good edge and an outlet channel for discharging the entire omitted good
  • said Weir edge is arranged on the front side of the centrifuge drum and the outlet channel extends in particular outside, in the flow direction behind the weir edge, the outlet channel is curved to redirect the effluent Good in a substantially tangential direction
  • the outlet channel has a bottom surface, at least in sections is just designed, wherein the flat portion of the bottom surface is inclined to the tangential direction by an angle of 8 ° to 28 ° radially inwardly.
  • the outlet device is provided for discharging clarified Good from a centrifuge drum on the front side of the centrifuge drum and attached there an associated outlet opening partially overlapping stationary or adjustable.
  • the outlet device comprises a weir with a weir edge and an outlet channel arranged outside the weir for discharging the entire discharged material.
  • the outlet opening is flowed through by the then axially outflowing material which flows out over the weir edge aligned there in the radial direction, that is to say transversely to the longitudinal axis.
  • the weir edge is in particular curved and widely spaced from the longitudinal axis of a first radius.
  • the downstream in the flow direction outlet channel is curved to redirect the outflowing Good in the substantially tangential direction.
  • the outlet channel is designed with a bottom surface over which the material flows. This bottom surface is preferably at least partially spaced from the longitudinal axis, as the first radius is.
  • a weir is provided on the front side, which has its weir edge in the radial plane of the front side, as in conventional weirs.
  • the weir thus arranged leads to a particularly accurate control of the material level within the centrifuge drum.
  • such a weir has only a low tendency to clog and is also very inexpensive in terms of its production. It may be provided in the design of conventional weirs optionally with a particularly wear-resistant designed weir edge. Furthermore, it can be well maintained and replaced.
  • the device according to the invention can therefore also be installed particularly well in replacement of existing systems.
  • the bottom surface is preferably at least partially radially outward, as the weir edge.
  • This type of flow at the weir edge has proven to be particularly advantageous in terms of the controlled removal of the material and also with regard to possible blockage.
  • the outlet channel according to the invention thus achieves two effects: It allows the controlled overflow of the weir edge in a radial direction with only slight turbulence, low imbalance risk and low risk of clogging. At the same time, the outlet channel directs the effluent specifically in the desired direction in order to recover a high level of energy from the effluent.
  • the bottom surface of such outlet channel is at least partially flat or largely flat.
  • Such a bottom surface can be manufactured inexpensively.
  • the material flowing therefrom over a longer distance undergoes a uniform and thus comparatively easy model-technically comprehensible acceleration.
  • the acceleration leads to an increased conversion of the centrifugal force pulse into a tangentially directed motion pulse. It is converted into tangential drive energy as a particularly large proportion of the centrifugal force energy.
  • the flat portion of the bottom surface is inclined to the tangential direction by an angle of 8 ° to 28 °, preferably 18 ° radially inwardly.
  • the bottom of the outlet channel according to the invention is designed so that its plane or substantially flat portion starts against the direction of rotation of the centrifuge drum from the Auslassö Maschinensmitte starting at an angle of 3.5 °.
  • the thus flat or substantially flat section begins at the outlet opening only a predefined piece behind the Auslassö Maschinensmitte.
  • the acceleration of the outgoing material achieved according to the invention thus likewise begins only further back in the outlet channel.
  • the suction obtained with the acceleration thus likewise arises comparatively far back in the outlet channel, as a result of which an overall speed-increasing increase in speed is to be found in the outlet channel. This suction effect reduces the risk of clogging and at the same time increases the kinetic energy in the tangential direction.
  • the flat section of the bottom surface particularly preferably ends counter to the direction of rotation of the centrifuge drum from the outlet opening center considered at an angle of 15 ° to 30 °, preferably 21.5 °.
  • the flat or substantially flat section of this type has a particularly advantageous length, which has proved to be very effective even with different outlet diameters and drum sizes.
  • a curved section in particular an arcuate section of the bottom surface, adjoins the flat section of the bottom surface.
  • a curved section can be produced inexpensively in terms of production and leads to a flow which is not radially changed over a certain angular range and thus also radially not accelerated or decelerated.
  • Such a flow has proven to be particularly advantageous over a certain portion of the circumferential direction.
  • This bottom surface leads to a largely turbulence-free overflow at the weir edge and thus to low imbalance development at the multiple, distributed over the circumference of the centrifuge drum and each overflowed by effluent Weirs.
  • the curved outlet duct according to the invention has, viewed in the longitudinal direction of the centrifuge drum, preferably a first width and a second width in the radial direction, the second width being smaller than the first width.
  • the outlet channel tapers from the outlet openings, that is to say in the flow direction, as far as the end of the outlet channel at which the outflowing material is largely released in the tangential direction. The rejuvenation brings a steady increase in the speed of the flow and thus the kinetic energy of the outflowing material with it.
  • the curved outlet duct is therefore particularly advantageous when viewed in the outlet direction and is designed to be continuously tapered with respect to its width.
  • the acceleration is then largely turbulence-free with simultaneously directed flow through the outlet openings and the subsequent Exhaust ports.
  • the such outlet channel is preferably designed to be open radially inward.
  • the outlet channel is thus in contrast to known solutions of the prior art, in which the outflowing material is discharged through one or more tubes in the tangential direction.
  • the invention according to the invention radially inwardly open channel is not only cheaper to produce, but also has less overall the risk of clogging. Furthermore, such a channel can be easily cleaned during maintenance because it is more accessible.
  • the weir edge and the outlet channel of the solid bowl screw centrifuge according to the invention are preferably designed with a component or in one piece or in one piece, wherein the component is particularly advantageous from the outside on the front side of the centrifuge drum attachable and removable from there.
  • the component is then easily retrofitted depending on the purpose of the centrifuge and can also be easily changed in case of maintenance.
  • the position of the weir cate can be adjusted well. With the adjustment of the weir edge changes in an advantageous manner at the same time the location of the associated outlet channel, without the need for further complicated adjustment or alignment work.
  • Fig. 1 the end face of a centrifuge drum 10 is shown in accordance with the conventional design of a solid bowl centrifuge in its interior receives a (not shown) centrifuge screw.
  • the centrifuge drum 10 is rotatable about a longitudinal axis 12 at high speed in a direction of rotation 14.
  • outlet openings 16 are arranged uniformly spaced over a circle around the longitudinal axis 12.
  • the outlet openings 16 are used for discharging or discharging clarified (not shown) Good from the centrifuge drum 10th
  • each outlet device 18 is attached to the outside of the front side of the centrifuge drum 10.
  • Each outlet device 18 is formed as a one-piece component from a weir plate 20 and an outlet channel 22.
  • the individual weir plate 20 extends in each case in the radial direction, that is transversely to the longitudinal axis 12 and is fixed by means of two screws 24 and thereby slightly fixed in position adjustable on the end face.
  • a weir edge 26 is formed, which is curved and spaced from the longitudinal axis 12 by a radius 28. The outflowing good must overflow this weir edge 26, whereby the crop level in the centrifuge drum 10 is selectively adjustable depending on the desired clarifying power.
  • the associated outlet channel 22 is arranged on the outside of each of the weir plates 20, which has been produced in one piece with the weir plate 20 by means of a milling process.
  • the outlet channel 22 receives the entire over the weir edge 26 flowing Good and thus serves to discharge the entire discharged from the respective outlet opening 16 Good.
  • the outlet channel 22 following in the flow direction of the weir edge 26 has a substantially rectangular cross section and in this case has a bottom surface 30.
  • the bottom surface comprises a curved section 32, which starts at the beginning of the outlet opening 16 along the weir edge 20 (ie in the circumferential direction) counter to the direction of rotation 14 and ends at an angle 34 of 3.5 ° behind the center of the outlet opening 16.
  • the curved portion 32 is designed curved according to the lateral surface of a circular cylinder with the radius 28.
  • a planar section 36 of the bottom surface 30 adjoins the curved section 32.
  • This section 36 extends from the angle 34, starting at an angle 38 of 21.6 °.
  • the flat portion 36 is inclined to the tangential direction by an angle 40 of 18 ° radially inwardly.
  • the planar portion 36 is therefore spaced further from the longitudinal axis 12 than the radius 28 is.
  • the acceleration leads to an increased conversion of the centrifugal force of the outflowing Guts in a tangentially directed motion pulse. Since in particular the entire amount of material flows through the outlet channel 22, a particularly large proportion of the centrifugal force energy of the outflowing material is converted into tangential drive energy for the rotational movement of the centrifuge drum 10.
  • This acceleration effect in the outlet channel 22 is supported by a continuous taper of the outlet channel 22 in the flow direction of the Guts, ie in the tangential direction.
  • This taper is formed in that, starting from a first width 42 for the incoming material, ie viewed in the longitudinal direction, the outlet channel 22 tapers to a second width 44 for the outflowing material, ie in the tangential or radial direction ,
  • the widths 42 and 44 are defined by two side walls 46 and 48 of the outlet channel 22, which are correspondingly curved from the longitudinal direction to the tangential direction.
  • such an outlet channel 22 is designed with a radially inwardly completely open area 50.
  • This area 50 allows a free adjustment of the product level in the outlet channel 22. Since the material can thus flow freely through the outlet channel 22, no blockages can result and the product level at the associated weir edge 26 can be free depending on the product level in the centrifuge drum 10 to adjust.
  • weir plates 20 and the there radially aligned weir edges 26 not least a particularly accurate control of the product level within the centrifuge drum 10 is possible even under highly fluctuating operating conditions.
  • the crop flows After flowing over the radially directed weir edges 26, the crop flows are thus each redirected so that they due to their flow through the outlet channel 22 when leaving the outlet 16 a in the range of 8 ° to 28 °, preferably a 18 ° from the tangential radially to have inside swung motion pulse.
  • the movement impulse thus directed has proved to be particularly advantageous with regard to the energy recycling thus produced in the centrifuge drum 10.

Landscapes

  • Centrifugal Separators (AREA)

Claims (9)

  1. Centrifugeuse à vis à bol plein dotée d'un tambour de centrifugeuse (10) pouvant tourner autour d'un axe longitudinal et comportant au moins une ouverture de sortie (16) pour faire sortir le produit clarifié hors du tambour de centrifugeuse (10) via un bord de débordement (26) laissant déborder le produit sortant et un canal de sortie (22) pour évacuer la totalité du produit sortant, le bord de débordement (26) étant disposé au niveau du côté avant du tambour de centrifugeuse (10) et le canal de sortie (22) s'étendant dans la direction d'écoulement derrière le bord de débordement (26), le canal de sortie (22) étant conçu de façon coudée, pour guider le produit à faire sortir dans une direction pour l'essentiel tangentielle et le canal de sortie (22) comportant une surface de plancher (30) conçue au moins partiellement de façon plane,
    caractérisée en ce que la section plane (36) de la surface de plancher (30) est inclinée radialement vers l'intérieur par rapport à la direction tangentielle, selon un angle allant de 8° à 28°.
  2. Centrifugeuse à vis à bol plein selon la revendication 1, dans laquelle la section plane (36) de la surface de plancher (30) est inclinée radialement vers l'intérieur par rapport à la direction tangentielle, selon un angle de 18°.
  3. Centrifugeuse à vis à bol plein selon la revendication 1 ou 2, dans laquelle la section plane (36) de la surface de plancher (30) commence, à contresens de la direction de rotation (14) du tambour de centrifugeuse (10), en partant du centre d'ouverture de sortie, selon un angle de 3,5°.
  4. Centrifugeuse à vis à bol plein selon l'une quelconque des revendications 1 à 3, dans laquelle la section plane (36) de la surface de plancher (30) prend fin, à contresens de la direction de rotation (14) du tambour de centrifugeuse (10), à partir du centre d'ouverture de sortie, selon un angle de 15° à 30°, de préférence de 21,5°.
  5. Centrifugeuse à vis à bol plein selon la revendication 4, dans laquelle une section coudée (32), notamment une section coudée en forme d'arc de cercle de la surface de plancher, est raccordée à la section plane (36) de la surface de plancher (30) dans la direction de rotation (14) du tambour de centrifugeuse (10).
  6. Centrifugeuse à vis à bol plein selon l'une quelconque des revendications 1 à 5, dans laquelle le canal de sortie (22) conçu de façon coudée comporte dans la direction longitudinale du tambour de centrifugeuse (10) une première largeur (42) pour le produit entrant et dans la direction radiale une deuxième largeur (44) pour le produit sortant, et la deuxième largeur (44) est inférieure à la première largeur (42).
  7. Centrifugeuse à vis à bol plein selon la revendication 6, dans laquelle le canal de sortie (22) conçu de façon coudée est conçu de façon à présenter une largeur se rétrécissant en permanence dans la direction de sortie.
  8. Centrifugeuse à vis à bol plein selon l'une quelconque des revendications 1 à 7, dans laquelle le canal de sortie (22) est conçu de façon ouverte radialement vers l'intérieur.
  9. Centrifugeuse à vis à bol plein selon l'une quelconque des revendications 1 à 8, dans laquelle le bord de débordement (26) et le canal de sortie (22) sont conçus avec un composant (18) pouvant être rapporté de façon stationnaire, notamment depuis l'extérieur, au niveau du côté avant du tambour de centrifugeuse (10) et en être retiré.
EP11006261.9A 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage Active EP2551019B2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK11006261.9T DK2551019T4 (da) 2011-07-29 2011-07-29 Fuldkappe-snekkecentrifuge med en overløbskant
DK13178930.7T DK2659985T4 (da) 2011-07-29 2011-07-29 Fuldkappe-snekkecentrifuge med overløbskant
EP13178930.7A EP2659985B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage
EP11006261.9A EP2551019B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11006261.9A EP2551019B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP13178930.7A Division-Into EP2659985B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage
EP13178930.7A Division EP2659985B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage

Publications (3)

Publication Number Publication Date
EP2551019A1 EP2551019A1 (fr) 2013-01-30
EP2551019B1 EP2551019B1 (fr) 2016-09-14
EP2551019B2 true EP2551019B2 (fr) 2019-11-06

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ID=45044247

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Application Number Title Priority Date Filing Date
EP11006261.9A Active EP2551019B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage
EP13178930.7A Active EP2659985B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13178930.7A Active EP2659985B2 (fr) 2011-07-29 2011-07-29 Centrifugeuse à vis a bol plein dotée d'un bord faisant barrage

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EP (2) EP2551019B2 (fr)
DK (2) DK2659985T4 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA017544B1 (ru) * 2008-08-15 2013-01-30 Эм-Ай ЭлЭлСи Центрифуга
EP2789395B2 (fr) 2013-04-08 2019-11-06 Flottweg SE Centrifugeuse à vis a bol plein dotée d'un dispositif de récupération d'énergie
DE102014108722A1 (de) 2014-04-30 2015-11-05 Hiller Gmbh Schneckenzentrifuge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008138345A1 (fr) † 2007-05-09 2008-11-20 Alfa Laval Corporate Ab Séparateur centrifuge et élément formant orifice de décharge en phase liquide
WO2010076750A1 (fr) † 2008-12-30 2010-07-08 Alfa Laval Corporate Ab Décanteuse centrifuge ayant un corps de distributeur à tiroir
DE102010061563A1 (de) † 2010-12-27 2012-06-28 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112585A1 (de) 1981-03-30 1982-10-14 Buckau-Walther AG, 4048 Grevenbroich Verfahren und vorrichtung zum trennen eines zweistoffgemisches
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
US7022061B2 (en) 2002-10-15 2006-04-04 Andritz Ag Centrifuge discharge port with power recovery
US20040072668A1 (en) 2002-10-15 2004-04-15 Baker Hughes Incorporated Liquid phase discharge port incorporating chamber nozzle device for centrifuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008138345A1 (fr) † 2007-05-09 2008-11-20 Alfa Laval Corporate Ab Séparateur centrifuge et élément formant orifice de décharge en phase liquide
WO2010076750A1 (fr) † 2008-12-30 2010-07-08 Alfa Laval Corporate Ab Décanteuse centrifuge ayant un corps de distributeur à tiroir
DE102010061563A1 (de) † 2010-12-27 2012-06-28 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr

Also Published As

Publication number Publication date
DK2659985T3 (en) 2016-12-19
DK2659985T4 (da) 2020-02-03
EP2659985A1 (fr) 2013-11-06
EP2551019A1 (fr) 2013-01-30
DK2551019T3 (en) 2016-12-12
EP2659985B1 (fr) 2016-09-14
DK2551019T4 (da) 2020-02-03
EP2659985B2 (fr) 2019-11-06
EP2551019B1 (fr) 2016-09-14

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