EP2130607A1 - Zentrifugalabscheider - Google Patents

Zentrifugalabscheider Download PDF

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Publication number
EP2130607A1
EP2130607A1 EP08425404A EP08425404A EP2130607A1 EP 2130607 A1 EP2130607 A1 EP 2130607A1 EP 08425404 A EP08425404 A EP 08425404A EP 08425404 A EP08425404 A EP 08425404A EP 2130607 A1 EP2130607 A1 EP 2130607A1
Authority
EP
European Patent Office
Prior art keywords
screw feeder
drum
centrifugal separator
separator according
channel
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.)
Granted
Application number
EP08425404A
Other languages
English (en)
French (fr)
Other versions
EP2130607B1 (de
Inventor
Leonardo Vicentini
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.)
Mantovani & Vicentini Srl
Original Assignee
Mantovani & Vicentini Srl
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 Mantovani & Vicentini Srl filed Critical Mantovani & Vicentini Srl
Priority to ES08425404T priority Critical patent/ES2385878T3/es
Priority to AT08425404T priority patent/ATE552908T1/de
Priority to EP08425404A priority patent/EP2130607B1/de
Publication of EP2130607A1 publication Critical patent/EP2130607A1/de
Application granted granted Critical
Publication of EP2130607B1 publication Critical patent/EP2130607B1/de
Not-in-force legal-status Critical Current
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
    • 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
    • B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing
    • 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
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • 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
    • B04B2001/2033—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 feed accelerator inside the conveying screw
    • 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 present invention relates to a centrifugal separator for treating sludges, suspensions and, in general, mixes of substances in the liquid phase and substances in the solid phase, adapted to separate more or less accurately the liquid phase from the solid phase.
  • centrifugal separator consists of a drum which rotates at high speed and is provided with an internal screw feeder. The loaded sludge undergoes centrifugation, during which the phases stratify; the phase with highest density (solid phase) is arranged on the outermost annular region.
  • the screw feeder rotates at a different rate with respect to the drum and entrains the solid phase toward the discharge.
  • the water (liquid phase) exits from the opposite side.
  • the liquid phase discharged by the separator is generally rather rich in the solid sediments: this means that the separation process does not ensure the result of correct separation of the solid phase from the liquid phase.
  • separation is required by environmental needs (separation of pollutants) or by the need to recover valuable material (treatment of mining sludges), it is absolutely necessary for the separation to be as thorough as possible.
  • the aim of the present invention is to provide a centrifugal separator which is suitable for high-performance separation of the solid phase and of the liquid phase of a mix.
  • an object of the present invention is to provide a centrifugal separator in which settling of the solid phase along the liquid phase expulsion path does not occur.
  • Another object of the present invention is to provide a centrifugal separator which can be operated easily, since it does not require particular maintenance.
  • Another object of the present invention is to provide a centrifugal separator with an architecture which is particularly simple and can be assembled easily.
  • Another object of the present invention is to provide a centrifugal separator which has low costs, is relatively simple to provide in practice and is safe in application.
  • the present centrifugal separator of the type that comprises an outer casing, within which at least one hollow drum is actuated so that it can rotate, at least one screw feeder which is actuated so that it can rotate, at a speed which is substantially higher than the speed of the respective drum, within said drum, skimming its internal surfaces, a circuit for feeding a solid-liquid mix and respective circuits for the separate expulsion of the solid phase and of the liquid phase, characterized in that the mix feed circuit comprises an inlet and a respective channel which leads out along at least one portion of the internal surface of said drum to dispense mix along the internal surface of said rotatable drum.
  • the reference numeral 1 generally designates a centrifugal separator according to the invention.
  • the centrifugal separator 1 comprises an outer casing 2, within which a hollow drum 3 is actuated so that it can rotate: with reference to the general nature of the description, for example, the separator 1 might also comprise a plurality of mutually independent drums 3 contained within a common casing 2 or within respective separate casings 2.
  • a first screw feeder 4 is actuated so that it can rotate, at a speed which is substantially higher than the speed of the respective drum 3, inside the drum 3 itself; the first screw feeder 4, during its relative rotation with respect to the corresponding drum 3, skins internal surfaces 5 thereof.
  • This relative motion is intended to convey the solids toward the outlet.
  • the separator 1 further comprises a circuit 6 for feeding a solid-liquid fit mix and respective circuits for separate expulsion of the solid phase and of the liquid phase.
  • the solid-liquid mix can be of different kinds: in particular, the separator 1 according to the invention is suitable for treating sludge and the like, but use with other mixes of another kind which require separation of the solid phase from the liquid phase is not excluded.
  • separators 1 are particularly suitable for treating mixes for purification purposes (therefore environmental use and the like) and for selection purposes (use in mines or other plants adapted to provide a raw material which contains a small part of valuable material to be selected).
  • the mix feed circuit 6 comprises an inlet 7 and a respective channel 8 which leads out along at least one portion 9 of the internal surface 5 of the drum 3: this embodiment allows the delivery of mix along the internal surface 5, proximate to its initial edge 10, of the rotating drum 3.
  • the feed circuit 6 comprises one inlet 7 which is arranged at one end 11 of the casing 2.
  • the end 11 is opposite to an end 12 in which an opening 13 for expelling the solid phase is located.
  • the inlet 7 leads, by means of the respective channel 8, to an annular chamber 14, which lies inside the casing 2 and the drum 3.
  • the chamber 14 is adapted to force the translational motion of the introduced mix in a radial direction by centrifugal action toward the portion 9 of the internal wall 5 of the drum 3.
  • the annular input chamber 14 is arranged upstream of the beginning of a first start 15 of the first screw feeder 4.
  • the circuit for expelling the liquid phase comprises a channel 16, which is coaxial to the at least one first screw feeder 4 and lies inside it in its portion located further upstream.
  • the channel 16 is adapted to convey the liquid phase with an axial orientation with respect to the rotation axis of the separator 1 and in the opposite direction with respect to the advancement direction of the solid phase on the drum 3 by way of the action of the first screw feeder 4.
  • the channel 16 comprises at least one portion of at least one second screw feeder 17, in which the crests face, and are proximate to, an internal surface 18 of the channel 16 to remove any solid sediment from the surface 18 and to convey the removed sediment toward the main screw feeder 4.
  • Continuous removal of sediment by the crests of the second screw feeder 17 from the internal surface 18 of the channel 16 ensures that such sediment does not accumulate and therefore that the operation of the separator 1 is not compromised by the presence of solid sediment in the liquid phase discharge channel 16.
  • this solution entails the possibility to reduce greatly maintenance interventions (aimed at cleaning the liquid phase discharge channel) and therefore allows less expensive and simpler operation than known types of separator.
  • the second screw feeder 17 in an embodiment of particular interest in practice and in application, is constituted by a ribbonlike ring which is arranged in a helical pattern on a plurality of radial supporting arms which extend from the channel 16: this embodiment ensures that a channel 16 of large size is available although the second screw feeder 17 designed to remove the sediment from the surface 18 is present.
  • the drum 3 and the first screw feeder 4 have a first upstream portion 19 which is substantially cylindrical and a second downstream portion 20 which is substantially frustum-shaped.
  • the first portion 19 is arranged directly downstream of the region where the mix is introduced by the feed circuit 6, while the second portion 20 has its end part substantially aligned with the opening 13 for expelling the solid phase.
  • the crest of the first screw feeder 4 faces, and is proximate to, the internal surface 5 of the drum 3, while the crest of the second screw feeder 17 faces, and is proximate to, the internal surface 18 of the channel 16.
  • both crests skim the corresponding surfaces 5 and 18 to remove and convey the solid phase deposited thereon.
  • the first screw feeder comprises, at a part 21 of the first portion 19, at least one tubular portion 22, within which the second screw feeder 17 is accommodated so that it can rotate.
  • the second screw feeder 17 is jointly connected to the corresponding drum 3; the corresponding crests therefore slide proximate to the internal surface of the tubular portion 22 of the first screw feeder 4: the starts of the second screw feeder 17 are arranged in a helical winding direction which is opposite with respect to the direction of the first screw feeder 4.
  • a relative speed of the first screw feeder 4 with respect to the drum 3 causes an advancement, toward the respective expulsion opening 13, of the solid phase, in the drum 3, by way of the action of the first screw feeder 4, and in the tubular portion 22, by way of the action of the second screw feeder 17.
  • a positive relative speed (which therefore corresponds to a higher rotation rate for the screw feeder 4 with respect to the drum 3) in fact entails entrainment toward the opening 13 of the solid matter comprised between the starts of the first screw feeder 4.
  • the relative speed is such that the tubular portion 22 (connected to the first screw feeder 4) move at a higher speed than the second screw feeder 17 (the relative speed is therefore negative in this case): since the helical winding direction is opposite with respect to the one of the first screw feeder 4, transfer of the sediment that is present on the surface of the channel 16 (internal surface of the portion 22) toward the opening 13 still occurs.
  • the separator 1 further comprises at least one external traction unit (not shown in the figure), which is intended to drive rotationally the drum 3, jointly with the second screw feeder 17, and the first screw feeder 4.
  • at least one external traction unit (not shown in the figure), which is intended to drive rotationally the drum 3, jointly with the second screw feeder 17, and the first screw feeder 4.
  • the different diameter of the pulleys 23, 24 determines the different rotation rate of the drum 3 with respect to the first screw feeder 4.
  • passages 25 designed to allow the outflow of the liquid phase through the respective channel 16.
  • the remaining solid phase continues to be entrained by the first screw feeder 4 to the opening 13: the centrifugal action contributes, throughout the entrainment, to separate from the solid phase the liquid phase, which tends to retract to be then expelled through the channel 16.
  • the second screw feeder 17 (by way of its relative movement with respect to the walls of the channel constituted by the internal surface of the tubular portion 22 of the screw feeder 4) removes sediment from the surfaces that face it.

Landscapes

  • Centrifugal Separators (AREA)
EP08425404A 2008-06-06 2008-06-06 Zentrifugalabscheider Not-in-force EP2130607B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES08425404T ES2385878T3 (es) 2008-06-06 2008-06-06 Separador centífugo
AT08425404T ATE552908T1 (de) 2008-06-06 2008-06-06 Zentrifugalabscheider
EP08425404A EP2130607B1 (de) 2008-06-06 2008-06-06 Zentrifugalabscheider

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08425404A EP2130607B1 (de) 2008-06-06 2008-06-06 Zentrifugalabscheider

Publications (2)

Publication Number Publication Date
EP2130607A1 true EP2130607A1 (de) 2009-12-09
EP2130607B1 EP2130607B1 (de) 2012-04-11

Family

ID=39797949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425404A Not-in-force EP2130607B1 (de) 2008-06-06 2008-06-06 Zentrifugalabscheider

Country Status (3)

Country Link
EP (1) EP2130607B1 (de)
AT (1) ATE552908T1 (de)
ES (1) ES2385878T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115853450A (zh) * 2022-12-26 2023-03-28 上海谊德实业发展有限公司 一种离心式泥浆净化一体机的螺旋分料器
CN120393575A (zh) * 2025-07-04 2025-08-01 淄博真空设备厂有限公司 一种气液分离装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4563234A1 (de) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Dekantierzentrifuge zur trennung von einsatzmaterial
WO2025114493A1 (en) 2023-11-30 2025-06-05 Alfa Laval Corporate Ab A decanter centrifuge for separating feed material
EP4563231A1 (de) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Dekantierzentrifuge zur trennung von einsatzmaterial
EP4563232A1 (de) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Dekantierzentrifuge zur trennung von einsatzmaterial
EP4563233A1 (de) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Dekantierzentrifuge zur trennung von einsatzmaterial

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268159A (en) * 1962-10-16 1966-08-23 Voith Gmbh J M Centrifuge
DE1482721A1 (de) 1964-07-18 1969-06-12 Thrige Titan As Separator
US4303192A (en) * 1979-07-05 1981-12-01 Hide Katsume Full jacket-worm centrifuge
EP0423461A2 (de) * 1989-10-17 1991-04-24 Klöckner-Humboldt-Deutz Aktiengesellschaft Vollmantel-Schneckenzentrifuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268159A (en) * 1962-10-16 1966-08-23 Voith Gmbh J M Centrifuge
DE1482721A1 (de) 1964-07-18 1969-06-12 Thrige Titan As Separator
US4303192A (en) * 1979-07-05 1981-12-01 Hide Katsume Full jacket-worm centrifuge
EP0423461A2 (de) * 1989-10-17 1991-04-24 Klöckner-Humboldt-Deutz Aktiengesellschaft Vollmantel-Schneckenzentrifuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115853450A (zh) * 2022-12-26 2023-03-28 上海谊德实业发展有限公司 一种离心式泥浆净化一体机的螺旋分料器
CN120393575A (zh) * 2025-07-04 2025-08-01 淄博真空设备厂有限公司 一种气液分离装置

Also Published As

Publication number Publication date
EP2130607B1 (de) 2012-04-11
ATE552908T1 (de) 2012-04-15
ES2385878T3 (es) 2012-08-02

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