EP3682971A1 - A device for wet mechanical separation of a mixture of solid materials of different density - Google Patents
A device for wet mechanical separation of a mixture of solid materials of different density Download PDFInfo
- Publication number
- EP3682971A1 EP3682971A1 EP19152143.4A EP19152143A EP3682971A1 EP 3682971 A1 EP3682971 A1 EP 3682971A1 EP 19152143 A EP19152143 A EP 19152143A EP 3682971 A1 EP3682971 A1 EP 3682971A1
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- EP
- European Patent Office
- Prior art keywords
- drum
- solid materials
- mixture
- bottom wall
- separating liquid
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
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- 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
- B04B1/02—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles without inserted separating walls
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- 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
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/12—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with continuous discharge
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- 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
Definitions
- the invention relates to a device for wet mechanical separation of a mixture of solid materials of different density, the materials in particular containing plastics, the device comprising a rotatable drum having a bottom wall, a closed peripheral wall and an open top opposite the bottom wall, said drum tapering conically upwards and vertically, a motor for rotating the rotatable drum in a rotation direction, and a supply for supplying a separating liquid, in particular water, with a mixture of solid materials of different density through the open top into the rotatable drum, the device being arranged for during operation rotating the drum so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of the drum while depending on their density solid materials to be separated either float on the surface of separating liquid or sink towards the bottom wall, and can be discharged and gathered from the top or bottom of the drum, respectively
- Such a device for wet mechanical separation of a mixture of solid materials of different density is for example known from DE-C1-19714793 .
- This known device has a conical rotatable drum which is mounted vertically. The drum is rotationally driven by a drive shaft which is designed as a hollow shaft arranged centrically below a bottom wall of the drum.
- the solid materials to be separated are supplied from above through the open top into the drum as a suspension in the form of a solid material - separating liquid mixture.
- the supply of the known device is a dispensing channel which extends through a central tube into the drum and terminates slightly below the center of the drum in an expanding funnel. Spaced below the funnel is an acceleration disc which is rotatably mounted by means of fastening struts to the central tube.
- the acceleration disc has a larger diameter than the funnel.
- the acceleration disc serves for separation and acceleration of the solid materials and for deflecting the supplied mixture laterally into the drum, which rotates from the outset by entering separating liquid in the drum in the operating state.
- the lighter solid materials to be separated float on the separating liquid forced against the inner wall of the drum and are discharged as floating material through a discharge tube at the top of the drum.
- a rinsing disc is provided below the acceleration disc and adjacent the bottom wall of the drum. The rinsing disc is connected via a tube to the acceleration disc and thus rotates therewith.
- the rinsing disc is provided on its underside with wing-like rotors which form discharge channels located there between. Between the acceleration disc and the rinsing disc a stabilizing disc is fixedly connected to the drum. Heavier solid materials that sink towards the bottom of the drum are deposited on the stabilizing disc which has openings near the peripheral wall of the drum from passing the heavier solid materials to the rinsing disc and consequently through a central discharge opening in the bottom wall of the drum. The central discharge opening in the bottom wall gives access to a central discharge tube which extends through the hollow drive shaft arranged centrically below the bottom wall of the drum.
- the known device efficiently separates lighter from heavier solid materials
- the known device requires a large number of components, mostly arranged inside the drum and two motors, one for rotationally driving the drum and the other for rotating the rinsing disc and acceleration disc.
- the hollow drive shaft through which the central discharge tube extends needs regular maintenance as does the inner side of the drum.
- solid materials that have sunk towards the bottom of the wall and are passed via the stabilizing disc and the discharge channels formed by the wing-like rotors under the rinsing disc can negatively influence the rotation of the rinsing disc or block the discharge passages.
- the known device also requires regular cleaning of the interior of the drum, leading to downtime.
- the invention provides a device for wet mechanical separation of a mixture of solid materials of different density, the materials in particular containing plastics, the device comprising a rotatable drum having a bottom wall, a closed peripheral wall and an open top opposite the bottom wall, said drum tapering conically upwards and vertically, a motor for rotating the rotatable drum in a rotation direction, and a supply for supplying a separating liquid with a mixture of solid materials of different density through the open top into the rotatable drum, the device being arranged for during operation rotating the drum so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of the drum while depending on their density solid materials to be separated either float on the surface of separating liquid or sink towards the bottom wall, and can be discharged and gathered from the top or bottom of the drum, respectively, characterized in that the bottom wall of the drum comprises at least one discharge extending radially outwards from the bottom wall of the
- the at least one radially outwards extending discharge comprises a radially outwards extending hollow arm provided with a discharge outlet, the arm being in fluid communication with the interior of the drum via a discharge aperture. Due to the radially extending arm the centrifugal force is enlarged thereby effectively discharging the heavier solid materials from the interior of the drum and thereby providing a device with a self cleaning drum, as a result of which less maintenance is needed to remove undischarged solid materials from the drum. It has appeared that the discharge of heavier solid materials is further improved when the radially outwards extending arm is curved such that the discharge outlet extends opposite the rotation direction.
- the outlet is provided with a nozzle for regulating the amount of separating liquid discharged in dependence of the solid materials to be separated.
- a nozzle for regulating the amount of separating liquid discharged from the drum the amount of separating liquid discharged from the drum can be adapted to the amount of separating liquid supplied into the drum, thereby providing a stable continuous operation of the device.
- the discharge aperture can be sized for regulating the amount of separating liquid discharged in dependence of the solid materials to be separated.
- the device comprises three radially outwards extending discharges. It has appeared that the device functions optimally with three radially outwards extending discharges.
- the motor for rotating the rotatable drum in a rotation direction is positioned in a housing below the bottom wall of the drum.
- the motor can be efficiently shielded from the environment, in particular from the separating liquid, by the housing as a result of which the motor needs less maintenance when compared to the motor for driving the drum according to DE-C1-19714793 .
- the device comprises a first receptacle arranged below the drum for receiving separating liquid and solid materials that have sunk and solid materials that have sunk towards the bottom wall and are discharged from the drum through the at least one radially outwards extending discharge.
- the inventive device can have a relative small foot print.
- the device comprises a discharge chute extending from the top wall of the drum downwards to a second receptacle separate from the first receptacle, said second receptacle for receiving separating liquid and solid materials that float on the surface of separating liquid and are discharged through the open top out of the drum, said discharge chute at least partly surrounding the drum and being arranged closely adjacent the drum.
- the discharge tube at the top of the drum of the device known from DE-C1-19714793 can be blocked in particular by plastic foil material.
- the rotatable drum consists of the bottom wall, the closed peripheral wall, the open top opposite the bottom wall, and the at least one radially outwards extending discharge in the bottom wall of the drum, the drum thus being free from internal components.
- the inventive device it is for example possible to correctly separate solid materials coming from shredded electricity cables, which solid materials comprise PVC and PE.
- the PE is the lighter material and during operation of the device floats on the separating liquid while the PVC is heavier and sinks towards the bottom of the drum.
- the PE separated by the inventive device can then be recycled in an easy manner.
- the invention is not restricted to separating PE from PVC and can be used to separate any solid materials of different density by using the correct separating liquid.
- the inventive device can e.g. also be used to separate oil or coal grit from water.
- a first embodiment of a device 1 for wet mechanical separation of a mixture of solid materials of different density is shown in side view.
- the device comprises a rotatable drum 2 having a bottom wall 3, a closed peripheral wall 4 and an open top 5 opposite the bottom wall.
- the drum 2 tapers conically upwards and vertically.
- a motor M is provided for rotating the rotatable drum 2 in a rotation direction R ( Fig. 2 ).
- the motor M for rotating the rotatable drum 2 is positioned in a housing 6 below the bottom wall 3 of the drum 2.
- the housing 6 shields the motor M from the environment.
- the invention is not restricted to the shown embodiment in which the motor is arranged directly below the bottom wall of the drum, and in other embodiments the motor can e.g. be arranged at the side of the drum outside of a first receptacle (as described below) for receiving heavier solid materials and separating liquid the motor driving the rotation of the drum e.g. by means of drive belts.
- the device 1 further comprises a supply 7 for supplying a separating liquid, in particular but not restricted to water, with a mixture of solid materials of different density which materials are to be separated.
- the supply 7 supplies the separating liquid with the mixture through the open top 5 into the rotatable drum 2.
- the supply 7 consists of a supply tube through which the separating liquid and the mixture of solid materials to be separated flow in the direction as indicated by the arrow S.
- the drum 2 is rotated so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of the drum 2, and the separating liquid and the mixture assume a position on the inner wall which is indicated in Fig. 1 by the dotted line L.
- the solid materials either float on the surface of separating liquid L or sink towards the bottom wall 3.
- the lighter solid materials floating on the separating liquid are indicated by ellipses 8, while the heavier solid materials are indicated by stars 9.
- the lighter solid materials 8 can be discharged out of the drum 2 from the top 5 by a discharge tube 10 which scoops the lighter solid material 8.
- the device 1 comprises three radially outwards extending discharges 11, although the invention is not restricted to this number. In alternative embodiments the device can have from one discharge to any number of discharges suitable for the purpose of separating solid materials of different density.
- the radially outwards extending discharges 11 each comprise a radially outwards extending hollow arm 12 provided with a discharge outlet 13.
- Each hollow arm 12 is in fluid communication with the interior of the drum 2 via a discharge aperture 14 ( Fig. 1 ).
- the radially outwards extending arms 12 are curved such that the discharge outlet 13 extends opposite the rotation direction R as is clearly visible in Fig. 2 .
- the outlet 13 can be provided with a nozzle 13A for regulating the amount of separating liquid discharged in dependence of the solid materials to be separated.
- a nozzle 13A can be a nozzle with an adjustable through flow aperture or can be a replaceable nozzle.
- the discharge aperture 14 can be sized for regulating the amount of separating liquid discharged from the drum 2 in dependence of the solid materials to be separated and in dependence of the amount of separating liquid supplied into the drum 2.
- Heavier solid materials 9 discharged from the drum 2 through the radially outwards extending discharges 11 are received in a first receptacle 15 arranged below the drum 2.
- a cover with a suitable aperture to receive the drum 2.
- a second embodiment of a device 1' for wet mechanical separation of a mixture of solid materials of different density is schematically shown in Fig. 4 .
- the second embodiment of the device 1' differs from the first embodiment of the device 1 in that the discharge tube 10 which scoops the lighter solid material 8 of the first embodiment is replaced by a discharge chute 16 extending from the top 5 of the drum 2 downwards to a second receptacle 17 separate from the first receptacle 15.
- the second receptacle 17 can thus receive separating liquid and lighter solid materials 8 that float on the surface of separating liquid and are discharged through the open top 5 out of the drum 2.
- the discharge chute 16 at least partly surrounds the drum 2 and is arranged closely adjacent to the drum 2 and is arranged such that it is prevented that separating liquid can seep between the discharge chute 2 and the peripheral wall of the drum 2 (e.g. by upstanding walls) .
- the discharge chute 16 is shown schematically and it will be clear that the chute is constructed such that separating liquid and lighter solid materials are only discharged into the second receptacle 17, for example by providing the discharge chute with upstanding walls.
- the discharge chute 16 slopes downward in one direction, the invention is not restricted to such an embodiment and in other embodiments the discharge chute can slope down in more than one direction.
- the rotatable drum 2 of the inventive device consists of the bottom wall 3, the closed peripheral wall 4, the open top 5 opposite the bottom wall 3 and the three discharges 11 radially outwards extending from the bottom wall 3 of the drum 2, the drum 2 thus is free from internal components.
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- Centrifugal Separators (AREA)
Abstract
A device for wet mechanical separation of a mixture of solid materials of different density comprises a rotatable drum (2) having a bottom wall (3), a closed peripheral wall (4) and an open top (5). The drum tapers conically upwards and vertically. A motor (M) is provided for rotating the drum in a rotation direction. A supply (7) supplies a separating liquid with a mixture of solid materials of different density through the open top (5) into the rotatable drum (2). During operation rotating the drum results in driving the separating liquid with the mixture of solid materials outwardly towards the inner wall of the drum. Depending on their density solid materials to be separated either float on the surface of separating liquid or sink towards the bottom wall and can be discharged and gathered from the top or bottom of the drum, respectively. The device comprises at least one discharge (11) extending radially outwards from the bottom wall (3) of the drum (2) for separating liquid and solid materials that have sunk to the bottom wall.
Description
- The invention relates to a device for wet mechanical separation of a mixture of solid materials of different density, the materials in particular containing plastics, the device comprising a rotatable drum having a bottom wall, a closed peripheral wall and an open top opposite the bottom wall, said drum tapering conically upwards and vertically, a motor for rotating the rotatable drum in a rotation direction, and a supply for supplying a separating liquid, in particular water, with a mixture of solid materials of different density through the open top into the rotatable drum, the device being arranged for during operation rotating the drum so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of the drum while depending on their density solid materials to be separated either float on the surface of separating liquid or sink towards the bottom wall, and can be discharged and gathered from the top or bottom of the drum, respectively
- Such a device for wet mechanical separation of a mixture of solid materials of different density is for example known from
DE-C1-19714793 . This known device has a conical rotatable drum which is mounted vertically. The drum is rotationally driven by a drive shaft which is designed as a hollow shaft arranged centrically below a bottom wall of the drum. The solid materials to be separated are supplied from above through the open top into the drum as a suspension in the form of a solid material - separating liquid mixture. The supply of the known device is a dispensing channel which extends through a central tube into the drum and terminates slightly below the center of the drum in an expanding funnel. Spaced below the funnel is an acceleration disc which is rotatably mounted by means of fastening struts to the central tube. The acceleration disc has a larger diameter than the funnel. The acceleration disc serves for separation and acceleration of the solid materials and for deflecting the supplied mixture laterally into the drum, which rotates from the outset by entering separating liquid in the drum in the operating state. During operation due to the centrifugal force of the drum, the lighter solid materials to be separated float on the separating liquid forced against the inner wall of the drum and are discharged as floating material through a discharge tube at the top of the drum. In the known device a rinsing disc is provided below the acceleration disc and adjacent the bottom wall of the drum. The rinsing disc is connected via a tube to the acceleration disc and thus rotates therewith. The rinsing disc is provided on its underside with wing-like rotors which form discharge channels located there between. Between the acceleration disc and the rinsing disc a stabilizing disc is fixedly connected to the drum. Heavier solid materials that sink towards the bottom of the drum are deposited on the stabilizing disc which has openings near the peripheral wall of the drum from passing the heavier solid materials to the rinsing disc and consequently through a central discharge opening in the bottom wall of the drum. The central discharge opening in the bottom wall gives access to a central discharge tube which extends through the hollow drive shaft arranged centrically below the bottom wall of the drum. Although the known device efficiently separates lighter from heavier solid materials, the known device requires a large number of components, mostly arranged inside the drum and two motors, one for rotationally driving the drum and the other for rotating the rinsing disc and acceleration disc. Further, it appears that the hollow drive shaft through which the central discharge tube extends needs regular maintenance as does the inner side of the drum. In particular solid materials that have sunk towards the bottom of the wall and are passed via the stabilizing disc and the discharge channels formed by the wing-like rotors under the rinsing disc can negatively influence the rotation of the rinsing disc or block the discharge passages. Thus the known device also requires regular cleaning of the interior of the drum, leading to downtime. - It is an object of the invention to provide an alternative device for wet mechanical separation of a mixture of solid materials of different density which device amongst other things needs less components than the known device and which requires less maintenance.
- In order to obtain at least one of these objects the invention provides a device for wet mechanical separation of a mixture of solid materials of different density, the materials in particular containing plastics, the device comprising a rotatable drum having a bottom wall, a closed peripheral wall and an open top opposite the bottom wall, said drum tapering conically upwards and vertically, a motor for rotating the rotatable drum in a rotation direction, and a supply for supplying a separating liquid with a mixture of solid materials of different density through the open top into the rotatable drum, the device being arranged for during operation rotating the drum so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of the drum while depending on their density solid materials to be separated either float on the surface of separating liquid or sink towards the bottom wall, and can be discharged and gathered from the top or bottom of the drum, respectively, characterized in that the bottom wall of the drum comprises at least one discharge extending radially outwards from the bottom wall of the drum for separating liquid and solid materials that have sunk to the bottom wall. By providing the radially outwards extending discharge solid materials that have sunk to the bottom wall and are forced radially outwards by the centrifugal force can be discharged very efficiently from the interior of the drum. It has further appeared that in this manner an acceleration disc and a rinsing disc as required by
DE-C1-19714793 are not necessary to obtain a correct separation of solid materials of different density. Further a stabilizing disc and even a central tube surrounding the supply of a separating liquid with a mixture of solid materials of different density can be dispensed with. As a result, the device according to the invention only requires one motor for rotating the drum, which motor need not be a hollow shaft drive motor, since the discharge of heavier solid materials that have sunk to the bottom of the drum are discharge radially and not centrically from the drum. - In an embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the at least one radially outwards extending discharge comprises a radially outwards extending hollow arm provided with a discharge outlet, the arm being in fluid communication with the interior of the drum via a discharge aperture. Due to the radially extending arm the centrifugal force is enlarged thereby effectively discharging the heavier solid materials from the interior of the drum and thereby providing a device with a self cleaning drum, as a result of which less maintenance is needed to remove undischarged solid materials from the drum. It has appeared that the discharge of heavier solid materials is further improved when the radially outwards extending arm is curved such that the discharge outlet extends opposite the rotation direction.
- In a further embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the outlet is provided with a nozzle for regulating the amount of separating liquid discharged in dependence of the solid materials to be separated. By using such a nozzle for regulating the amount of separating liquid discharged from the drum the amount of separating liquid discharged from the drum can be adapted to the amount of separating liquid supplied into the drum, thereby providing a stable continuous operation of the device. In addition to or as an alternative to the provision of nozzles the discharge aperture can be sized for regulating the amount of separating liquid discharged in dependence of the solid materials to be separated.
- In a further embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the device comprises three radially outwards extending discharges. It has appeared that the device functions optimally with three radially outwards extending discharges.
- In a still further embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the motor for rotating the rotatable drum in a rotation direction is positioned in a housing below the bottom wall of the drum. The motor can be efficiently shielded from the environment, in particular from the separating liquid, by the housing as a result of which the motor needs less maintenance when compared to the motor for driving the drum according to
DE-C1-19714793 . - In an embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the device comprises a first receptacle arranged below the drum for receiving separating liquid and solid materials that have sunk and solid materials that have sunk towards the bottom wall and are discharged from the drum through the at least one radially outwards extending discharge. In this manner the inventive device can have a relative small foot print.
- In a still further embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the device comprises a discharge chute extending from the top wall of the drum downwards to a second receptacle separate from the first receptacle, said second receptacle for receiving separating liquid and solid materials that float on the surface of separating liquid and are discharged through the open top out of the drum, said discharge chute at least partly surrounding the drum and being arranged closely adjacent the drum. It has appeared that the discharge tube at the top of the drum of the device known from
DE-C1-19714793 can be blocked in particular by plastic foil material. By using the discharge chute the inventive device can efficiently separate plastic foil material floating on the separating liquid without being blocked. - In a still further embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention the rotatable drum consists of the bottom wall, the closed peripheral wall, the open top opposite the bottom wall, and the at least one radially outwards extending discharge in the bottom wall of the drum, the drum thus being free from internal components. By the inventive device it is for example possible to correctly separate solid materials coming from shredded electricity cables, which solid materials comprise PVC and PE. The PE is the lighter material and during operation of the device floats on the separating liquid while the PVC is heavier and sinks towards the bottom of the drum. The PE separated by the inventive device can then be recycled in an easy manner. Please note that the invention is not restricted to separating PE from PVC and can be used to separate any solid materials of different density by using the correct separating liquid. The inventive device can e.g. also be used to separate oil or coal grit from water.
- The invention will be further explained with reference to the Figures, in which non-limiting exemplary embodiments of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention are shown:
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Fig. 1 schematically shows an embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention in side view; -
Fig. 2 schematically shows part of the embodiment ofFig. 1 in a top view; -
Fig. 3 schematically shows the rotatable drum of the device ofFigs. 1 and2 in perspective; and -
Fig. 4 schematically shows another embodiment of a device for wet mechanical separation of a mixture of solid materials of different density according to the invention in perspective. - In
Figs. 1 to 3 a first embodiment of adevice 1 for wet mechanical separation of a mixture of solid materials of different density is shown in side view. The device comprises arotatable drum 2 having abottom wall 3, a closedperipheral wall 4 and anopen top 5 opposite the bottom wall. As e.g. shown inFigs. 1 and3 thedrum 2 tapers conically upwards and vertically. A motor M is provided for rotating therotatable drum 2 in a rotation direction R (Fig. 2 ). In the embodiment shown inFig. 1 the motor M for rotating therotatable drum 2 is positioned in a housing 6 below thebottom wall 3 of thedrum 2. The housing 6 shields the motor M from the environment. Please note however, that the invention is not restricted to the shown embodiment in which the motor is arranged directly below the bottom wall of the drum, and in other embodiments the motor can e.g. be arranged at the side of the drum outside of a first receptacle (as described below) for receiving heavier solid materials and separating liquid the motor driving the rotation of the drum e.g. by means of drive belts. - The
device 1 further comprises asupply 7 for supplying a separating liquid, in particular but not restricted to water, with a mixture of solid materials of different density which materials are to be separated. Thesupply 7 supplies the separating liquid with the mixture through theopen top 5 into therotatable drum 2. As shown inFig. 1 thesupply 7 consists of a supply tube through which the separating liquid and the mixture of solid materials to be separated flow in the direction as indicated by the arrow S. - During operation the
drum 2 is rotated so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of thedrum 2, and the separating liquid and the mixture assume a position on the inner wall which is indicated inFig. 1 by the dotted line L. Depending on the density of the solid materials to be separated, the solid materials either float on the surface of separating liquid L or sink towards thebottom wall 3. InFig. 1 the lighter solid materials floating on the separating liquid are indicated byellipses 8, while the heavier solid materials are indicated bystars 9. In the embodiment shown inFig. 1 the lightersolid materials 8 can be discharged out of thedrum 2 from the top 5 by adischarge tube 10 which scoops the lightersolid material 8. - The heavier
solid materials 9 sink towards thebottom wall 3 of thedrum 2 and as result of the centrifugal force created by therotating drum 2 are discharged with separating liquid from thedrum 2 throughdischarges 11 which extend radially outwards from thebottom wall 3 of thedrum 2. In the embodiment shown thedevice 1 comprises three radially outwards extendingdischarges 11, although the invention is not restricted to this number. In alternative embodiments the device can have from one discharge to any number of discharges suitable for the purpose of separating solid materials of different density. - The radially outwards extending
discharges 11 each comprise a radially outwards extendinghollow arm 12 provided with adischarge outlet 13. Eachhollow arm 12 is in fluid communication with the interior of thedrum 2 via a discharge aperture 14 (Fig. 1 ). The radially outwards extendingarms 12 are curved such that thedischarge outlet 13 extends opposite the rotation direction R as is clearly visible inFig. 2 . Theoutlet 13 can be provided with anozzle 13A for regulating the amount of separating liquid discharged in dependence of the solid materials to be separated. Such anozzle 13A can be a nozzle with an adjustable through flow aperture or can be a replaceable nozzle. In addition or alternatively thedischarge aperture 14 can be sized for regulating the amount of separating liquid discharged from thedrum 2 in dependence of the solid materials to be separated and in dependence of the amount of separating liquid supplied into thedrum 2. - Heavier
solid materials 9 discharged from thedrum 2 through the radially outwards extendingdischarges 11 are received in afirst receptacle 15 arranged below thedrum 2. In order to prevent alien material to fall into thefirst receptacle 15 it is possible to close thefirst receptacle 15 by means of a cover with a suitable aperture to receive thedrum 2. - A second embodiment of a device 1' for wet mechanical separation of a mixture of solid materials of different density is schematically shown in
Fig. 4 . The second embodiment of the device 1' differs from the first embodiment of thedevice 1 in that thedischarge tube 10 which scoops the lightersolid material 8 of the first embodiment is replaced by adischarge chute 16 extending from thetop 5 of thedrum 2 downwards to asecond receptacle 17 separate from thefirst receptacle 15. Thesecond receptacle 17 can thus receive separating liquid and lightersolid materials 8 that float on the surface of separating liquid and are discharged through the open top 5 out of thedrum 2. Thedischarge chute 16 at least partly surrounds thedrum 2 and is arranged closely adjacent to thedrum 2 and is arranged such that it is prevented that separating liquid can seep between thedischarge chute 2 and the peripheral wall of the drum 2 (e.g. by upstanding walls) . Please note that inFig. 4 thedischarge chute 16 is shown schematically and it will be clear that the chute is constructed such that separating liquid and lighter solid materials are only discharged into thesecond receptacle 17, for example by providing the discharge chute with upstanding walls. Although inFig. 4 thedischarge chute 16 slopes downward in one direction, the invention is not restricted to such an embodiment and in other embodiments the discharge chute can slope down in more than one direction. - As clearly indicated in
Fig. 3 therotatable drum 2 of the inventive device consists of thebottom wall 3, the closedperipheral wall 4, the open top 5 opposite thebottom wall 3 and the threedischarges 11 radially outwards extending from thebottom wall 3 of thedrum 2, thedrum 2 thus is free from internal components.
Claims (10)
- A device for wet mechanical separation of a mixture of solid materials of different density, the device comprising a rotatable drum having a bottom wall, a closed peripheral wall and an open top opposite the bottom wall, said drum tapering conically upwards and vertically, a motor for rotating the rotatable drum in a rotation direction, and a supply for supplying a separating liquid with a mixture of solid materials of different density through the open top into the rotatable drum, the device being arranged for during operation rotating the drum so that as a result of centrifugal force the separating liquid with the mixture of solid materials is driven outwardly towards the inner wall of the drum while depending on their density solid materials to be separated either float on the surface of separating liquid or sink towards the bottom wall, and can be discharged and gathered from the top or bottom of the drum, respectively, characterized in that the device comprises at least one discharge extending radially outwards from the bottom wall of the drum for separating liquid and solid materials that have sunk to the bottom wall.
- A device for wet mechanical separation of a mixture of solid materials of different density according to claim 1, wherein the at least one radially outwards extending discharge comprises a radially outwards extending hollow arm provided with a discharge outlet, the arm being in fluid communication with the interior of the drum via a discharge aperture.
- A device for wet mechanical separation of a mixture of solid materials of different density according to claim 2, wherein the radially outwards extending arm is curved such that the discharge outlet extends opposite the rotation direction.
- A device for wet mechanical separation of a mixture of solid materials of different density according to claim 2 or 3, wherein the outlet is provided with a nozzle for regulating the amount of separating liquid discharged from the drum in dependence of the solid materials to be separated.
- A device for wet mechanical separation of a mixture of solid materials of different density according to any one of the claims 2 to 4, wherein the discharge aperture is sized for regulating the amount of separating liquid discharged from the drum in dependence of the solid materials to be separated.
- A device for wet mechanical separation of a mixture of solid materials of different density according to any one of the preceding claims, wherein the device comprises three radially outwards extending discharges.
- A device for wet mechanical separation of a mixture of solid materials of different density according to any one of the preceding claims, wherein the motor for rotating the rotatable drum in a rotation direction is positioned in a housing below the bottom wall of the drum.
- A device for wet mechanical separation of a mixture of solid materials of different density according to any one of the preceding claims, wherein the device comprises a first receptacle arranged below the drum for receiving separating liquid and solid materials that have sunk towards the bottom wall and are discharged from the drum through the at least one radially outwards extending discharge.
- A device for wet mechanical separation of a mixture of solid materials of different density according to any one of the preceding claims, wherein the device comprises a discharge chute extending from the top wall of the drum downwards to a second receptacle separate from the first receptacle, said second receptacle for receiving separating liquid and solid materials that float on the surface of separating liquid and are discharged from the open top out of the drum, said discharge chute at least partly surrounding the drum and being arranged closely adjacent the drum.
- A device for wet mechanical separation of a mixture of solid materials of different density according to any one of the preceding claims, wherein the rotatable drum consists of the bottom wall, the closed peripheral wall, the open top opposite the bottom wall, and the at least one discharge radially outwards extending from the bottom wall of the drum, the drum being free from internal components.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP19152143.4A EP3682971A1 (en) | 2019-01-16 | 2019-01-16 | A device for wet mechanical separation of a mixture of solid materials of different density |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP19152143.4A EP3682971A1 (en) | 2019-01-16 | 2019-01-16 | A device for wet mechanical separation of a mixture of solid materials of different density |
Publications (1)
Publication Number | Publication Date |
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EP3682971A1 true EP3682971A1 (en) | 2020-07-22 |
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ID=65033537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19152143.4A Withdrawn EP3682971A1 (en) | 2019-01-16 | 2019-01-16 | A device for wet mechanical separation of a mixture of solid materials of different density |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115921090A (en) * | 2022-11-15 | 2023-04-07 | 邹立霞 | Fluidized bed dry coal dressing equipment |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE623279C (en) * | 1931-12-10 | 1935-12-17 | Jahn & Co | Centrifugal machine with outflow nozzles arranged tangentially opposite the direction of rotation of the drum on the drum |
DE923301C (en) * | 1953-01-11 | 1955-02-10 | Schuechtermann & Kremer Baum A | Method and device for processing minerals, in particular hard coal, in low fluidity |
DE2409224A1 (en) * | 1973-03-20 | 1974-09-26 | Clasicon Proprietary Ltd | CLASSIFICATION PROCEDURE AND DEVICE |
DE19714793C1 (en) | 1997-04-10 | 1998-07-02 | Holger Schoenebeck | Mechanical wet-separating system for solids mixtures, especially plastics |
WO2006111008A1 (en) * | 2005-04-18 | 2006-10-26 | Mcalister Steven A | Centrifugal concentrator with variable diameter lip |
-
2019
- 2019-01-16 EP EP19152143.4A patent/EP3682971A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE623279C (en) * | 1931-12-10 | 1935-12-17 | Jahn & Co | Centrifugal machine with outflow nozzles arranged tangentially opposite the direction of rotation of the drum on the drum |
DE923301C (en) * | 1953-01-11 | 1955-02-10 | Schuechtermann & Kremer Baum A | Method and device for processing minerals, in particular hard coal, in low fluidity |
DE2409224A1 (en) * | 1973-03-20 | 1974-09-26 | Clasicon Proprietary Ltd | CLASSIFICATION PROCEDURE AND DEVICE |
DE19714793C1 (en) | 1997-04-10 | 1998-07-02 | Holger Schoenebeck | Mechanical wet-separating system for solids mixtures, especially plastics |
WO2006111008A1 (en) * | 2005-04-18 | 2006-10-26 | Mcalister Steven A | Centrifugal concentrator with variable diameter lip |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115921090A (en) * | 2022-11-15 | 2023-04-07 | 邹立霞 | Fluidized bed dry coal dressing equipment |
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