EP0828570B1 - A device for separating material - Google Patents

A device for separating material Download PDF

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Publication number
EP0828570B1
EP0828570B1 EP96917767A EP96917767A EP0828570B1 EP 0828570 B1 EP0828570 B1 EP 0828570B1 EP 96917767 A EP96917767 A EP 96917767A EP 96917767 A EP96917767 A EP 96917767A EP 0828570 B1 EP0828570 B1 EP 0828570B1
Authority
EP
European Patent Office
Prior art keywords
feeding
fraction
holes
container
feeding member
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.)
Expired - Lifetime
Application number
EP96917767A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0828570A1 (en
Inventor
Rolf Linder
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.)
Spiral Tech I Borlange AB
Original Assignee
Spiral Tech I Borlange AB
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 Spiral Tech I Borlange AB filed Critical Spiral Tech I Borlange AB
Publication of EP0828570A1 publication Critical patent/EP0828570A1/en
Application granted granted Critical
Publication of EP0828570B1 publication Critical patent/EP0828570B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/20—Stationary drums with moving interior agitators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness

Definitions

  • This invention relates to a device for separating material according to the preamble of appended claim 1.
  • the device according to the invention is very well suited to be used also for separating other types of material.
  • the device according to the invention is particularly suited for separating material in which one of the fractions to be separated from each other is tough, continuous and/or sticky and by that has a tendency to obstruct the prior art devices used until now for this purpose.
  • FR-A-2 539 337 describes a device for separating material comprising a container provided with a plurality of holes and for receiving the material to be separated and a member with the shape of a screw for feeding the material in the container.
  • the feeding member is adapted to pass over the holes in the perforated part of the container through parts thereof during the feeding and thereby to cause a first fraction of the material to pass out through the holes and a second fraction to be continuously fed in the container.
  • This device is intended to separate foreign particles from grapes in connection with grape harvest by feeding the mixture of the grapes and the foreign particles by a screw over the holes in a container 1 for making the foreign particles pass through the holes.
  • the object of the present invention is to provide a device which find a remedy to the inconveniences mentioned above of the device according to FR-A-2 539 337and enables also an efficient separation of materials with a tough and/or sticky consistency from each other while minimizing the frequency of interruptions of the operation necessary as a consequence of need of cleaning.
  • This object is according to the invention obtained by providing such a device, in which the feeding device is arranged to pass closely over the holes through parts thereof and thereby in co-operation with the edges of the holes give rise to shearing of the material between the hole edges and the feeding member, and by providing the feeding member designed as a screw with a central longitudinal cavity.
  • the separation performance of the device is further improved by connecting this shearing action with the feature that the feeding screw is provided with a central longitudinal cavity, through which a very good stirring effect and redistribution of the material to be separated is obtained, which is favourable for the very separation as well as the subsequent treatment of any of the fractions, for example a compostable material.
  • the feeding device comprises means adapted to carry material therewith, and then preferably said second fraction, in the rotational movement about the rotation axis of the feeding member and means for carrying material therewith, comprises projections projecting in the feeding direction from the screw-like feeding member.
  • the projections have the advantage that they by that further contribute to the separation of the material in the respective fractions thereof, which is particularly clear in the case when plastic in the form of plastic bags, oils or the like is separated from compostable material, in which case the plastic is primarily carried along by the projection.
  • this comprises an arrangement arranged below the container for transporting said first fraction away, said arrangement comprising a transporting member adapted to also procure a stirring of the first fraction besides transporting this fraction in a certain direction, said transporting member being designed as a screw with a central continuous cavity.
  • FIG. 1 A preferred embodiment of the device according to the invention is shown in Fig. 1.
  • This comprises a container 2 provided with a plurality of holes 1 and which is intended to receive material to be separated in the device.
  • the container 2 is also intended to accommodate a member 3 arranged for feeding the material in the container, which appears from the Figures 3 and 4.
  • the feeding member 3 is arranged to pass over the holes 1 by parts thereof during the feeding and to by that bring a first fraction of the material to pass out through the holes 1 and a second fraction to be fed further in the container 2.
  • the feeding device 3 is arranged to pass closely over the holes 1 through parts thereof and by that through the corporation with the hole edges give rise to shearing of material between the hole edges and the feeding member 3.
  • the feeding member 3 has the shape of a screw, which is driven by a driving device 4, which is arranged at one end of the container and in principle may be of any suitable type, for instance an electric motor.
  • the feeding member 3 is provided with a central longitudinal cavity 5. This is of a great importance for achieving stirring of the material in the container 2.
  • the feeding member 3 further comprises means 6 adapted to carry the material therewith, and 5 preferably the second fraction, in the rotational movement about the rotation axis of the feeding member 3.
  • the means 6 for carrying material therewith comprises projections projecting in the feeding direction from the screw-like feeding member 3.
  • the projections are preferably elongated and extend in a direction substantially in parallel with the feeding direction, but deviations from such a parallelism are also conceivable within the scope of the invention.
  • the means 6 for carrying material therewith are then preferably designed as pins. It is preferred that at least one such means 6 for carrying material therewith is arranged on each screw turn, which is the case in the preferred embodiment and which has turned out to be very efficient in practise.
  • the length of the means 6 for carrying material therewith may be varied within comparatively broad limits but is in the preferred embodiment, in which especially separation of plastic material in the form of plastics bags from compostable material is intended, in the region of 1-30 cm, preferably 5-15 cm.
  • a length of about 10 cm of the members has led to excellent results. They are of great importance for the material separation, since they preferably pull one of two fractions to be separated along, usually the more gluey and continuous thereof, and by that contributes to an improved separation.
  • the device comprises further an arrangement 7 located below the container 2 for transporting the first fraction away. It has an opening upwardly for receiving the material falling from the container 2 through the holes 1.
  • the arrangement 7 comprises for the transportation of the fraction so received a transporting member 8 arranged to also cause stirring of the first fraction besides transporting it in a certain direction.
  • the transporting member 8 is designed as a screw having a central continuous cavity 9. Similar to the cavity 5 of the feeding member 3 the cavity 9 of the transporting member 8 contributes to an improved stirring of the material transported therein, which in some cases is of an essential importance for a further treatment of this material as mentioned above.
  • the function of the device there are an amount of variables possible to adjust according to the type of material to be separated, the amount of such material, the size of or the size distribution of particular pieces of the material supplied to the device, the type of the subsequent treatment of the fractions separated, the outer conditions (such as for example the temperature), etc.
  • Example of such variables are the length and diameter as well as the inclination of the container 2 and of the feeding member 3. Since especially an increased feeding speed is desired it is favourable that the feeding member and the container are inclined in the longitudinal direction thereof, through which material is brought to pass faster through the device.
  • the size of the holes 1 as well as the design, location and number thereof may preferably be varied according to the particular case. It is then particularly advantageous that the container 2 is formed by a frame 11 and at least a member 12 releasably connected thereto and provided with holes. This makes it possible to replace the member or members provided with holes by members having a different size and/or design of the holes.
  • the holes With respect to the design of the holes, it has turned out, in particular in the case when plastic material in the form of plastic bags are separated from compostable material, that it is advantageous that the holes have a substantially elongated shape with longitudinal direction thereof in an angle, preferable a substantially right angle, with the longitudinal direction of the feeding member 3. Such an elongated shape of the holes 1 is indicated, even if it is a little bit unclear in Fig. 4. Elongated shape comprises here that the holes extend further in one direction than in another.
  • the pitch of the feeding member 3, when this has the shape of a screw, and the width of the screw threads are also variables which a man skilled in the art may in a suitable way adjust for the particular case without departing from the idea of the invention thereby.
  • the same is valid for the design of the projections 6 as well as for the speed selected for the passage of the feeding member 3 with parts thereof over the holes 1.
  • the feeding member 3 has the design of a screw it is appropriate that such a speed variation takes place by adjusting a number of revolutions by which the screw is rotated.
  • the device is intended to be used in the following way:
  • Material which for example in an earlier stage has been excerted to any form of crushing, disintegration or the like so as to give it a shape more suited for separation or so as to a certain extent separate an envelope from the content thereof, as is the case for plastic bags containing compostable material, is fed downwardly to an inlet 10 connected to the container 2 and having a hopper-like design, said inlet being located at one end of the container 2.
  • the material supplied to the container 2 is fed therein by making the feeding member 3, which has the shape of a screw, to rotate by means of the driving device 4.
  • the feeding member 3 co-operates with the hole edges of the hole 1 by passing closely thereover and by that shear material present there.
  • one fraction as in the case of plastic material and compostable material of plastic, is more continuous and/or tougher than the first fraction intended to be separated therefrom, this fraction will not be cut off and fall downwardly through the holes to any larger extent, but it will rather be carried further by the feeding member 3 and also penetrate in between the outer circumference thereof and the container 2 and by that function lubricating between the feeding member 3 and the container 2. Thus, the first fraction falls downwardly through the holes 1, while the second fraction is fed in the feeding direction of the feeding member 3.
  • the first fraction falls downwardly into an arrangement 7 for transporting it away, wherein the transporting member 8 feeds the first fraction to one end of the arrangement 7 where this fraction is collected, on for example a conveyor belt or in any form of container, and is transported further for additional treatment.
  • the second fraction fed in the container 2 is also finally fed out of the container, which as the arrangement 7 is open at one end thereof, and is transported further away therefrom in a similar way as the first fraction.
  • the entire device When the device is intended for separating plastic material, preferably in the form of plastic bags, from compostable material, the entire device has preferably a length in the order of 10 m. It is therefore comparatively easy to place on a platform of a lorry and transport to stations where it is intended to in this way separate the content of household garbage and the like.
  • the device has with respect to the application just described, plastic and compostable material, turned out to be very well suited, and only very small proportions of the plastic material have after the separation been possible to find among the compostable material.

Landscapes

  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fertilizers (AREA)
EP96917767A 1995-06-02 1996-05-31 A device for separating material Expired - Lifetime EP0828570B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9502014A SE515353C2 (sv) 1995-06-02 1995-06-02 Anordning för separering av material
SE9502014 1995-06-02
PCT/SE1996/000707 WO1996038237A1 (en) 1995-06-02 1996-05-31 A device for separating material

Publications (2)

Publication Number Publication Date
EP0828570A1 EP0828570A1 (en) 1998-03-18
EP0828570B1 true EP0828570B1 (en) 2001-08-16

Family

ID=20398488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96917767A Expired - Lifetime EP0828570B1 (en) 1995-06-02 1996-05-31 A device for separating material

Country Status (7)

Country Link
EP (1) EP0828570B1 (sv)
AT (1) ATE204213T1 (sv)
DE (1) DE69614530T2 (sv)
DK (1) DK0828570T3 (sv)
NO (1) NO314620B1 (sv)
SE (1) SE515353C2 (sv)
WO (1) WO1996038237A1 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104828289A (zh) * 2015-04-30 2015-08-12 如皋市中如化工有限公司 轻钙粉机械送料包装装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209552503U (zh) * 2018-09-17 2019-10-29 北京环境工程技术有限公司 一种挤压分离、提纯设备
CN112295887A (zh) * 2020-09-29 2021-02-02 无锡金球机械有限公司 使用分离装置对废塑料热裂解固态产物进行分离的方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1235427A (en) * 1915-09-08 1917-07-31 William F Bridewell Cotton-seed conveyer and cleaner.
SE416893B (sv) * 1977-09-15 1981-02-16 Torsten Frunck Sorterande och transporterande skersiktorgan
CA1101356A (en) * 1979-05-29 1981-05-19 Louis Ludwig Cleaning attachment for grain augers
FR2539337B1 (fr) * 1983-01-18 1985-07-26 Peyre Micheline Dispositif separateur de corps etrangers pour bac recepteur de vendanges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104828289A (zh) * 2015-04-30 2015-08-12 如皋市中如化工有限公司 轻钙粉机械送料包装装置

Also Published As

Publication number Publication date
NO975478D0 (no) 1997-11-28
SE9502014L (sv) 1996-12-03
SE515353C2 (sv) 2001-07-16
DE69614530T2 (de) 2002-05-08
NO975478L (no) 1997-11-28
DE69614530D1 (de) 2001-09-20
ATE204213T1 (de) 2001-09-15
WO1996038237A1 (en) 1996-12-05
EP0828570A1 (en) 1998-03-18
NO314620B1 (no) 2003-04-22
DK0828570T3 (da) 2001-11-26
SE9502014D0 (sv) 1995-06-02

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