EP2571621B1 - Centrifugeuse à vis sans fin à paroi plein - Google Patents
Centrifugeuse à vis sans fin à paroi plein Download PDFInfo
- Publication number
- EP2571621B1 EP2571621B1 EP11719267.4A EP11719267A EP2571621B1 EP 2571621 B1 EP2571621 B1 EP 2571621B1 EP 11719267 A EP11719267 A EP 11719267A EP 2571621 B1 EP2571621 B1 EP 2571621B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- settling
- solid bowl
- screw
- bowl centrifuge
- 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
Links
- 239000007787 solid Substances 0.000 title claims description 35
- 239000007788 liquid Substances 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005352 clarification Methods 0.000 description 29
- 239000010865 sewage Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- B04B2001/2066—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 additional disc stacks
-
- 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.
- Such solid bowl screw centrifuges have long been known in various designs, so from the DE 35 18 885 A1 , This document discloses a solid bowl screw centrifuge with a secondary clarifier, which is formed from a deposited on the screw core filter means or a lamellar jacket.
- the suspension feed - also called distributor - opens between the clarification part - which is referred to in this document the cylindrical part of the drum - and the dehumidifying part - which is referred to in this document, the conical part of the drum, in the drum.
- a generic solid bowl screw centrifuge according to the preamble of claim 1 is known from EP 0 461 918 B1 known.
- circumferentially distributed planar clarification plates are arranged on the screw body according to the disclosure of this document, whose planes are parallel to the axis of rotation, but do not extend in their imaginary extension through the axis of rotation or are not radially aligned on the cylindrical screw body but on to stand diagonally.
- This plate is partially under the liquid level during operation and acts as clarifying elements.
- a residual screw is arranged between the outer circumference of the clarification plates and the drum inner casing, which, however, does not touch the drum casing.
- the clarification plates optimize the clarification process.
- a similar construction reveals the EP 0856 360 A2 ,
- the throttle plate is provided with openings passing through it. Through the throttle plate and by a corresponding dimensioning and distribution of the openings on the throttle plate, it is possible in a simple manner to build pressure in the (Klär-) columns in the Klärplattenan Aunt because the size of the openings is smaller than for the derivation of the derived Amount of liquid necessary, which results in a targeted further optimization of the clarification.
- FIG. 1 shows an unclaimed solid bowl screw centrifuge with a rotatable drum 1 with horizontal axis of rotation D.
- a rotatable with a differential speed to the drum 1 screw 2 is arranged, which has a helical screw blade 3 for discharging a solid phase, over part of the axial extent of the screw body 4 is arranged on the outer circumference and rotatably coupled thereto or connected.
- At least one liquid outlet 7 - here provided with a paring disc 8 - and a solids discharge (not shown here) at the tapered end of the drum 1 are used to discharge at least a liquid and at least one solid phase.
- the drum 1 is at its two ends to drum bearings 9 - of which in Fig. 1 one is shown - rotatably mounted on a machine frame 10 and rotatable by means of a motor, not shown here, which is followed by a gear in rotation.
- the worm 2 is rotatably supported by one or more worm bearings 11.
- the screw 2 may have a differential speed to the drum 1. It can be rotated by the motor to drive the drum or via a separate motor in rotation.
- the worm 2 preferably extends axially in the direction of the axis of rotation D via a cylindrical portion 12 of the drum and a tapering portion 13 of the drum.
- the Klärplattenan Aunt 14 has a plurality - at least two or more, in particular more than ten - circumferentially distributed sewage plates 15 which are distributed at an angle to the radial direction to the rotation axis D outside the circumference of the screw body 4, which, for example, well in Fig. 2b can be seen.
- the clarification plates 15 extend according to a particularly preferred embodiment parallel to the axis of rotation D of the drum 1 and the screw body 4, enforce the axis of rotation D but not in an imaginary extension / clamping their planes.
- the clarification plates 15 are then - see Fig. 2b - Not radially perpendicular to the outer circumference of the screw body 4 but close to one side with this an acute angle ⁇ , for which applies: 0 ° ⁇ ⁇ 90 ° and preferably 45 ° ⁇ ⁇ 80 °.
- the angle ⁇ can be dimensioned according to a repose angle of a product to be processed or a solids content of the product.
- the Klärplattenan extract 14 may be formed as a preassembled KlärplattenMech, which is mounted as a whole on the outer circumference of the screw body 4 and is mounted.
- the distance of the clarification plates 15 in the circumferential direction, their orientation on the screw body 4 and their radial extent are suitably determined by the expert in the context of the Kläraetgabe to be solved in the experiment.
- the column 16 are usually sized smaller than for the processing of suspensions, in which there are larger solid particles.
- the clarification plates 15 of the clarification plate assembly 14 preferably extend axially only over part of the cylindrical portion 13 of the drum 1 or the entire cylindrical portion 13 of the drum 1.
- the shape of the plates 15 is largely arbitrary, but they must extend radially so far outward that they dive sufficiently far in the liquid level in operation to support the clarification can.
- the clarification plates 15 in cross section of Fig. 1 a flat, flat shape.
- the clarification plates 15 can also be curved in itself.
- the sewage plates 15 also have in section the Fig. 1 , which passes through the axis of rotation D, preferably a rectangular geometry.
- clarification plates 15 in views analogous to Fig. 1 ) have a rectangular portion 15a, and preferably towards the tapering end of the drum 1, a tapered, narrowing portion 15b (see Fig. 1 and Fig. 4 ).
- region of section 15b can also be formed completely free of plates.
- the clarification plates 15 are particularly preferably formed as flat sheets. For example, it is conceivable to manufacture it from a metal sheet, as it is also used for the production of separation plates of separators. However, they may also have a shape deviating from a plane shape, e.g. a slight arch shape, have.
- the annular region is formed by the entrance of the inlet / distributor 6 into the drum without a clarifier plate.
- the sewage plates 15 then have, for example, the type of Fig. 2a or 3a in this view a kind of L-shape on or in Fig. 1 the area 15b remains clear of the plate.
- Fig. 2 to 3 In each case, the contour of the drum in the drawing is schematically indicated around the screw.
- Fig. 4b shows a corresponding section through the screw 2 in the region of the manifold 6.
- the manifold 6 is formed here as a cross manifold having four here perpendicular to each other formed inlet channels 6a, 6b, 6c, 6d, which connect the inner feed tube 5 with the drum interior.
- the drum 1 is provided at its cylindrical end with a drum cover 18 to which a rotating with the drum peeling chamber portion 19 is attached or formed with the peeling disc 8.
- the peeling disc 8 arranged in the peeling chamber section 19 does not rotate during operation. It serves as a liquid outlet.
- one or more drain openings 20 are preferably formed.
- a weir plate 21 is attached to the end of the screw 2, which rotates in operation with the screw 2 - and to this or on the Klärplattenan Aunt 14 or on a screw rotatably connected part - is mounted and which the drain holes 20 is connected upstream in the drum cover 19.
- the weir plate 21 serves as overflow weir and extends - see Fig. 1 - Radial perpendicular to the axis of rotation - where it defines an overflow edge at its inner diameter.
- the weir plate 21 extends radially outward as far as just before the inner circumference of the drum 1, as it is possible due to the relative movement between the drum 1 and the screw 2. Such a transfer of material in the region of the gap between the drum 1 and the outer periphery of the weir plate 21 is prevented as far as possible.
- the extent of the weir plate 21 is radially outwardly greater than the radial extent of the clarification plates 15th
- This weir plate 21 is replaced according to the invention by a throttle plate 22.
- the throttle plate 22 is rotatably connected to the cylindrical end of the screw with this.
- the throttle plate 22 preferably has such a radial extent and arrangement on the screw 2 that the clarifier plate assembly 14 is closed in the direction of the cylindrical end of the drum 1 radially over its entire circumference from the throttle plate 22 to openings 22 introduced into the throttle plate 22.
- the throttle plate 22 extends radially outwardly as far as just before the inner periphery of the drum 1, as it due to the relative movement between the drum 1 and the screw 2 is possible. Such a transfer of material in the region of the gap between the drum 1 and the outer periphery of the throttle plate 22 is largely prevented.
- the extension of the throttle plate 22 radially outwardly greater than the radial extent of the clarification plates 15.
- weir plate 21 or the throttle plate 22 is alternatively attached to the drum 1 (not shown here), which the solid area outside the drum 1 to the full Seals out liquid flow, it may extend radially inward in the direction of the screw 2 only to the region of an overflow edge.
- the weir plate 21 or the throttle plate 22 is preferably spaced as small as possible axially to the screw 2 (not shown here), for example, this axial distance is 0.5 mm to 10mm, in particular 1 to 3 mm.
- the attachment of the throttle plate 22 or the weir plate 21 on the screw 2 is preferred because it leads to particularly advantageous results.
- the throttle plate 22 is - as in Fig. 2 and 2b to be recognized - penetrated by a plurality of openings 23. These can have any desired shape. To Fig. 2 are the openings 23, for example, as slots and after Fig. 3 designed as elliptical holes. However, the openings 23 may also have, for example, a circular shape or an angular shape.
- the openings 23 are distributed on the throttle plate 22, that in the assembled state, each of the gaps 16 with at least one of the openings 23 is preferably - or only partially - aligned, so that these at least one opening 23 as liquid drain from the gap 16 serves.
- each of the column 16 is aligned with more than one of the openings 22, so that virtually in the region of the opening 23 in the axial extension directly one of the clarification plates is located.
- Fig. 3 To Fig. 3 are two concentric rows of here each eight circumferentially offset slots provided as the openings 23.
- the throttle plate 22 eight of the clarification plates 15 arranged circumferentially distributed.
- the elongated holes can also be distributed on the throttle plate such that the inner and outer openings are circumferentially offset relative to one another, so that only the gaps 16 and not the "slanted” clarification plates 15 are aligned with one of the openings 23.
- the openings can also be formed by grooves / slots, which are introduced from the inner or outer periphery in the throttle plate.
- no openings 23 are formed in the radial region of the throttle plate 22, which lies radially further outward than the maximum extent of the clarification plates 15, so that no back mixing with the product in the centrifugal space occurs here.
- the holes 23 may all be identically formed on the throttle plate 22 or different.
- the diameter of the openings 23 may be radially further inside smaller than further out.
- the clarification plate body 14 with the clarification plates 15 optimizes the clarifying effect and / or - when used on a three-phase centrifuge with two liquid outlets and a solids outlet, the separating effect during the processing of a suspension to be clarified and possibly also separated into different liquid phases.
Landscapes
- Centrifugal Separators (AREA)
Claims (16)
- Centrifugeuse à vis sans fin à bol plein aveca. un tambour rotatif (1) avec au moins une sortie de solides et au moins une sortie de liquide (7),b. une vis sans fin (2) disposée dans le tambour (1) et pouvant tourner à une vitesse différente du tambour (1), qui présente au moins une pale de vis sans fin (3) en spirale,c. et avec une disposition de plaques de clarification (14) avec plusieurs plaques de clarification (15) qui sont disposées sur le corps de vis sans fin (3) dans une partie de l'étendue du corps de vis sans fin (3),caractérisée en ce qu'elle comported. une plaque d'étranglement (22) présentant des ouvertures (23), qui est disposée entre la disposition de plaques de clarification (14) et l'au moins une sortie de liquide (7) menant hors du tambour,e. la plaque d'étranglement (22) étant couplée de manière solidaire en rotation avec la vis sans fin (2) ou de manière solidaire en rotation avec le tambour (1), etf. dans laquelle la plaque d'étranglement et les ouverture de la plaque d'étranglement créent une pression dans les interstices ou les interstices de clarification au niveau de la disposition de plaques de clarification par le fait que la taille des ouvertures est plus petite que celle nécessaire pour évacuer la quantité de liquide à évacuer.
- Centrifugeuse à vis sans fin à bol plein selon la revendication 1, caractérisée en ce que la vis sans fin (2) s'étend dans le sens axial dans la direction de l'axe de rotation (D) sur une partie cylindrique (12) du tambour et une partie qui se resserre (13) du tambour et en ce que la pale de vis sans fin (3) passe au moins en partie ou sur toute sa longueur, dans la partie cylindrique (12), à distance dans le sens radial du corps de vis sans fin (3) sur la circonférence extérieure de la disposition de plaques de clarification (14).
- Centrifugeuse à vis sans fin à bol plein selon la revendication 1, 2 ou 3, caractérisée en ce que la disposition de plaques de clarification (14) présente plusieurs (au moins deux ou plus) des plaques de clarification (15), qui sont réparties sur la circonférence parallèlement à l'axe de rotation (D) du tambour (1) et du corps de vis sans fin (4), les plans définis par les plaques de clarification ne croisant pas l'axe de rotation (D), de sorte qu'ils forment avec la circonférence extérieure du corps de vis sans fin (4), vers un côté, un angle aigu α tel que 0° < α < 90° et de préférence 45° < α < 80°.
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que la disposition de plaques de clarification (14) est réalisée comme un bloc de plaques de clarification préassemblé qui peut être ou est monté dans son ensemble sur la circonférence extérieure du corps de vis sans fin (4).
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que des interstices de clarification (16) sont formés entre des plaques de clarification (15) voisines.
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque d'étranglement (22) présente une étendue radiale et une disposition sur la vis sans fin (2) telles que la disposition de plaques de clarification (14) soit fermée en direction de l'extrémité cylindrique du tambour (1) dans le sens radial, sur toute sa circonférence, par la plaque d'étranglement (22), à l'exception des ouvertures (23) ménagées dans la plaque d'étranglement (22).
- Centrifugeuse à vis sans fin à bol plein selon la revendication 6, caractérisée en ce que les ouvertures (23) sont conformées comme des trous oblongs ou circulaires ou elliptiques.
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications 6 ou 7, caractérisée en ce que les ouvertures (23) sont réparties sur la plaque d'étranglement (22) de telle manière que dans l'état monté, chacun des interstices (16) soit aligné avec au moins une des ouvertures (23), de préférence entièrement mais aussi partiellement seulement, de telle sorte que cette au moins une ouverture (23) serve d'écoulement de liquide hors de l'interstice (16).
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque d'étranglement (22) se prolonge dans le sens radial plus loin que les plaques de clarification (15).
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque d'étranglement (22) s'étend dans le sens radial vers l'extérieur jusque peu avant la circonférence intérieure du tambour (1), comme le rend possible le mouvement relatif entre le tambour (1) et la vis sans fin (2).
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que chacun des interstices (16) est aligné avec plus d'une des ouvertures (23).
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'aucune ouverture (23) n'est formée dans la partie radiale de la plaque d'étranglement (22) située au-delà de l'étendue maximale des plaques de clarification (15) dans le sens radial.
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les plaques de clarification (15) présentent une forme plane.
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les plaques de clarification (15) ont une forme courbée.
- Centrifugeuse à vis sans fin à bol plein selon la revendication 14, caractérisée en ce que les plaques de clarification (15) planes ont une forme rectangulaire ou sont en forme de L ou présentent une partie rectangulaire (15a) et une partie (15b) qui se resserre vers l'extrémité qui se resserre du tambour (1).
- Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que la zone entourant l'entrée d'au moins un distributeur (6) est dépourvue de plaques de clarification pour servir de zone d'entrée dans le tambour (1) pour une suspension à traiter, de sorte qu'un espace de giration (17) annulaire est formé autour du distributeur (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010020901A DE102010020901A1 (de) | 2010-05-18 | 2010-05-18 | Vollmantel-Schneckenzentrifuge |
PCT/EP2011/057725 WO2011144520A1 (fr) | 2010-05-18 | 2011-05-12 | Centrifugeuse à vis sans fin à paroi plein |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2571621A1 EP2571621A1 (fr) | 2013-03-27 |
EP2571621B1 true EP2571621B1 (fr) | 2017-12-20 |
Family
ID=44453806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11719267.4A Active EP2571621B1 (fr) | 2010-05-18 | 2011-05-12 | Centrifugeuse à vis sans fin à paroi plein |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2571621B1 (fr) |
DE (1) | DE102010020901A1 (fr) |
TR (1) | TR201802284T4 (fr) |
WO (1) | WO2011144520A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015122006A1 (de) * | 2015-12-16 | 2017-06-22 | Flottweg Se | Trommeldeckel einer Vollmantelschneckenzentrifuge |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4743226A (en) * | 1983-04-29 | 1988-05-10 | Geosource Inc. | High capacity continuous solid bowl centrifuge |
DE3344432C2 (de) * | 1983-12-08 | 1987-04-23 | Flottweg-Werk Bird Machine GmbH, 8313 Vilsbiburg | Zentrifuge zur Trennung einer Suspension mit zwei getrennt abzuführenden Flüssigkeitsphasen |
DE3518885A1 (de) | 1985-05-25 | 1986-11-27 | Bayer Ag, 5090 Leverkusen | Vollmantelschneckenzentrifuge mit nachklaervorrichtung |
GB9013371D0 (en) | 1990-06-15 | 1990-08-08 | Broadbent & Sons Ltd Thomas | Improvements in separating systems |
DE4132029A1 (de) * | 1991-09-26 | 1993-04-01 | Westfalia Separator Ag | Wehrscheibe zum einstellen des fluessigkeitsstandes in vollmantelschleudertrommeln von schneckenzentrifugen |
IT1289718B1 (it) * | 1996-12-05 | 1998-10-16 | Cornello Centrifughe S R L | Tamburo rotante con coclea interna per estrattore centrifugo per olio di oliva |
JP3945856B2 (ja) * | 1997-05-29 | 2007-07-18 | 三菱化工機株式会社 | 液・固−液分離用スクリュウ型デカンター |
DE20208119U1 (de) * | 2002-05-24 | 2002-08-14 | Hiller GmbH, 84137 Vilsbiburg | Dekantierzentrifuge für die Gewinnung von Frucht- oder Gemüsesäften |
-
2010
- 2010-05-18 DE DE102010020901A patent/DE102010020901A1/de not_active Withdrawn
-
2011
- 2011-05-12 EP EP11719267.4A patent/EP2571621B1/fr active Active
- 2011-05-12 TR TR2018/02284T patent/TR201802284T4/tr unknown
- 2011-05-12 WO PCT/EP2011/057725 patent/WO2011144520A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
TR201802284T4 (tr) | 2018-03-21 |
WO2011144520A1 (fr) | 2011-11-24 |
DE102010020901A1 (de) | 2011-11-24 |
EP2571621A1 (fr) | 2013-03-27 |
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