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EP0678333A1 - Centrifugeuse à poussoir - Google Patents

Centrifugeuse à poussoir Download PDF

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Publication number
EP0678333A1
EP0678333A1 EP95105560A EP95105560A EP0678333A1 EP 0678333 A1 EP0678333 A1 EP 0678333A1 EP 95105560 A EP95105560 A EP 95105560A EP 95105560 A EP95105560 A EP 95105560A EP 0678333 A1 EP0678333 A1 EP 0678333A1
Authority
EP
European Patent Office
Prior art keywords
cone
impeller
distributor cone
centrifuge according
push
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Withdrawn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
EP95105560A
Other languages
German (de)
English (en)
Inventor
Bruno Hegnauer
Siegfried Pöschl
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
Mannesmann Demag Krauss Maffei 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 Krauss Maffei AG, Mannesmann Demag Krauss Maffei GmbH filed Critical Krauss Maffei AG
Publication of EP0678333A1 publication Critical patent/EP0678333A1/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Withdrawn legal-status Critical Current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
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges

Definitions

  • the invention relates to a push centrifuge according to the preamble of claim 1.
  • a centrifuge of this type is known from DE-AS 10 89 687, in which the suspension impinging on the distributor cone first impacts the tip of the distributor cone, which is designed in the manner of a spherical cap, and destroys the kinetic energy which the suspension contains when it emerges from the filling tube .
  • the suspension thus braked must then be accelerated in the filling accelerator by the static friction on the surfaces of the distributor cone and the conical jacket arranged at a distance from it in order to achieve the inflow speed required for the downstream impeller vanes.
  • the suspension is then thrown directly from the impeller vanes onto the filter surface, which means that there is a risk that the suspension will reach the surface of the filter drum in a strip-like inhomogeneous composition.
  • the suspension In addition to the energy loss that the suspension experiences on impact with the dome-like tip of the distributor cone, and the strip-shaped inconsistencies of the suspension thrown off by the impeller blades, the suspension cannot be brought up to the inflow speed required for an optimal pump effect. If the suspension impacts and the suspension, which cannot be accelerated to the optimum inflow speed, is caught in the pump wheel, there is also the risk of the broken fragments of the solid suspension components.
  • the invention is therefore based on the object of improving a pusher centrifuge of the aforementioned type in such a way that the efficiency of the filling acceleration is increased when the grain of the solid suspension components is treated gently and the suspension is distributed homogeneously on the filter drum.
  • the distributor cone has a cone angle of less than or equal to 90 ° at its tip, which changes into a cone angle of greater than or equal to 100 ° from a diameter corresponding to half the diameter of the outlet opening of the filling tube.
  • the front edges of the profiled impeller blades have a rounded cross section with essentially the largest diameter Have profile thickness of the impeller blade. Pump wheels with these profile shapes of the blades have very poor suction properties. It is therefore advantageous if the material to be conveyed (the suspension) has a feed rate that is not too low (kinetic energy), which is achieved by the above-described connection of a favorably shaped distributor cone for low-loss deflection of the suspension.
  • the flow channel between two impeller vanes is advantageously designed in such a way that the flow cross section narrows with increasing flow velocity.
  • the pusher centrifuge shown in Fig. 1 consists of a centrifuge housing 1 in which a single-stage filter drum 2 is mounted.
  • the filter drum has a hollow shaft 3, which is penetrated by the axis 4 of a moving floor 5, which is moved back and forth by periodic strokes of the axis 4 and moves the filter cake 6 located on the filter drum 2 forward in batches.
  • a filling accelerator 7 is arranged on the moving floor 5 and consists of a pump wheel 8, pump wheel blades 9 and a distributor cone 10.
  • the distributor cone 10 has a central opening 11 into which a filling tube 12 connected to the centrifuge housing 1 projects, in the outlet opening 13 of which a distributor cone 14 is arranged, which can be adjusted in the axial direction by means of an adjusting rod 15 supported on the filling tube 12.
  • the suspension 16 guided via the filling tube 12 reaches the suction area of the pump wheel 8 via the annular outlet opening 13 due to the arrangement of the distributor cone 14 and is gripped by the profiled pump wheel blades 9. Since the front edges 17 are strongly rounded, the suspension enters the impeller in a manner that is gentle on the grain, the flow channel between two impeller vanes 9 narrowing in accordance with the increasing flow velocity, as a result of which optimum throughput is achieved without stalling.
  • the distributor cone 10 At the trailing edges 18 of the impeller blades 9 there is the distributor cone 10, on which the suspension 16 is distributed in a thin film and, before being spun onto the filter drum 2, experiences a particularly effective and gentle acceleration to the peripheral speed of the filter drum 2.
  • the pusher centrifuge shown in FIG. 2 consists of a centrifuge housing 21, in which a two-stage filter drum 22 with a first and a second drum section 23 and 24 is mounted.
  • the second drum section 24 has a hollow shaft 25 which is penetrated by the axis 26 of the first drum section 23, which is moved back and forth by periodic strokes of the axis 26.
  • a push floor 27 is connected to the second drum section 24, on which a filling accelerator 28 is arranged, which consists of a pump wheel 29, pump wheel blades 30, a distributor cone 31 and a distributor cone 32.
  • the distributor cone 32 projects into the outlet opening 33 of a filling tube 34 which is connected to the centrifuge housing 21 and which can be changed in length by means of a telescopically displaceable end piece 35.
  • the annular outlet opening 13 can thus be adjusted to an opening width suitable for an optimal pump throughput as required.
  • the suspension 36 which flows axially via the filling pipe 34, is deflected in the radial direction into the suction area of the pump wheel 29 when it hits the distributor cone 32.
  • the suspension is grasped by the profiled impeller vanes 30, accelerates in the flow channel located between two impeller vanes 30, and reaches a distributor cone 31 arranged downstream of the rear edges 38 of the impeller vanes 30, on which the suspension is placed in the same way as in the embodiment according to FIG. 1 described, accelerated and homogenized.

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  • Centrifugal Separators (AREA)
EP95105560A 1994-04-22 1995-04-12 Centrifugeuse à poussoir Withdrawn EP0678333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4414118 1994-04-22
DE19944414118 DE4414118A1 (de) 1994-04-22 1994-04-22 Schubzentrifuge

Publications (1)

Publication Number Publication Date
EP0678333A1 true EP0678333A1 (fr) 1995-10-25

Family

ID=6516187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105560A Withdrawn EP0678333A1 (fr) 1994-04-22 1995-04-12 Centrifugeuse à poussoir

Country Status (2)

Country Link
EP (1) EP0678333A1 (fr)
DE (1) DE4414118A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8246842B2 (en) 2008-03-28 2012-08-21 Andritz Separation, Inc. Screen bowl centrifuge
CN105413885A (zh) * 2015-12-27 2016-03-23 安徽淮化股份有限公司 一种浆渣自动分离的离心机
CN108993782A (zh) * 2018-07-07 2018-12-14 廖大萍 用于固液的旋液分离装置
CN118663430A (zh) * 2024-08-22 2024-09-20 长沙鑫本助剂有限公司 一种试剂级硝酸钾生产用固液分离装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831764A (en) * 1973-06-05 1974-08-27 Pennwalt Corp Pusher-type centrifuge
DE8631618U1 (de) * 1986-11-26 1987-01-15 Westfalia Separator Ag, 4740 Oelde Einlaufrohr für Zentrifugen
DE9304723U1 (de) * 1993-03-19 1993-08-19 Krauss-Maffei AG, 80997 München Zentrifuge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE970399C (de) * 1951-06-21 1958-09-18 Krauss Maffei Ag Einlaufvorrichtung fuer Schubzentrifugen
DE948409C (de) * 1954-07-10 1956-08-30 Krauss Maffei Ag Einlaufvorrichtung fuer das Schleudergut in Schubzentrifugen
DE1043958B (de) * 1956-12-19 1958-11-13 Krauss Maffei Ag Schwingzentrifuge
DE1197813B (de) * 1961-07-15 1965-07-29 Krauss Maffei Ag Schubzentrifuge
US3463316A (en) * 1968-06-19 1969-08-26 Baker Perkins Inc Centrifugal separating system
DE2901643A1 (de) * 1979-01-17 1980-07-31 Krauss Maffei Ag Zentrifugen-produktbeschleuniger
SU1194505A1 (ru) * 1983-05-19 1985-11-30 Ростовский-На-Дону Ордена Трудового Красного Знамени Институт Сельскохозяйственного Машиностроения Центрифуга
DE4308749C1 (de) * 1993-03-19 1994-04-07 Krauss Maffei Ag Schubzentrifuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831764A (en) * 1973-06-05 1974-08-27 Pennwalt Corp Pusher-type centrifuge
DE8631618U1 (de) * 1986-11-26 1987-01-15 Westfalia Separator Ag, 4740 Oelde Einlaufrohr für Zentrifugen
DE9304723U1 (de) * 1993-03-19 1993-08-19 Krauss-Maffei AG, 80997 München Zentrifuge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8246842B2 (en) 2008-03-28 2012-08-21 Andritz Separation, Inc. Screen bowl centrifuge
CN105413885A (zh) * 2015-12-27 2016-03-23 安徽淮化股份有限公司 一种浆渣自动分离的离心机
CN108993782A (zh) * 2018-07-07 2018-12-14 廖大萍 用于固液的旋液分离装置
CN118663430A (zh) * 2024-08-22 2024-09-20 长沙鑫本助剂有限公司 一种试剂级硝酸钾生产用固液分离装置

Also Published As

Publication number Publication date
DE4414118A1 (de) 1995-10-26

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19981117

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Owner name: KRAUSS-MAFFEI AKTIENGESELLSCHAFT