EP1106264B1 - Screen for sorting solid waste - Google Patents

Screen for sorting solid waste Download PDF

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Publication number
EP1106264B1
EP1106264B1 EP00125944A EP00125944A EP1106264B1 EP 1106264 B1 EP1106264 B1 EP 1106264B1 EP 00125944 A EP00125944 A EP 00125944A EP 00125944 A EP00125944 A EP 00125944A EP 1106264 B1 EP1106264 B1 EP 1106264B1
Authority
EP
European Patent Office
Prior art keywords
plates
axis
screen
solid waste
rollers
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
EP00125944A
Other languages
German (de)
French (fr)
Other versions
EP1106264A2 (en
EP1106264A3 (en
Inventor
Cappozzo Domenico
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.)
Ecostar Srl
Original Assignee
Ecostar 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
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Priority claimed from ITPD990268 external-priority patent/IT1306697B1/en
Priority claimed from ITPD20000095 external-priority patent/IT1315426B1/en
Application filed by Ecostar Srl filed Critical Ecostar Srl
Priority to DK00125944T priority Critical patent/DK1106264T3/en
Publication of EP1106264A2 publication Critical patent/EP1106264A2/en
Publication of EP1106264A3 publication Critical patent/EP1106264A3/en
Application granted granted Critical
Publication of EP1106264B1 publication Critical patent/EP1106264B1/en
Anticipated expiration legal-status Critical
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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
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • 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
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers

Definitions

  • the present invention concerns the sector of screening and sorting processes and in particular it concerns a new screen for sorting solid waste.
  • Wire netting screens comprise a net with meshes with increasing size, through which the material to be screened falls in sequence. Smaller objects pass through the net, that is, they fall first, in the area with finer meshes, while bigger objects fall in the successive areas, where the net has larger meshes.
  • Wire netting screens are expensive due to the fact that the net is dragged and wears out rather quickly, and they also require a material advance system.
  • the screens with plate rollers comprise a series of parallel rollers, each one of which is constituted by an axis with plates fixed to it.
  • the pitch between the rollers and between the plates of the same roller may be constant or increasing.
  • All the rollers are set rotating at the same time and in the same direction.
  • the upper area of each roller rotates towards the rollers that are most spaced and have the most spaced plates.
  • the objects to be screened are put onto the first rollers with reduced pitch, which provide for conveying them towards the rollers with increased pitch. Along their course, the smaller objects fall into the spaces between rollers and plates, while the objects with increasing size pass through the successive rollers and plates.
  • the new sorting screen comprises, in its main parts, a support and alignment frame, a set of rollers with plates and anti-clogging elements.
  • the frame is constituted by several metal parts and has the function of supporting and aligning all the rollers, of containing the material to be screened and of covering all the members that transmit motion to the rollers.
  • the frame houses the various rollers, which are parallel to one another and whose pitch may be constant or increasing in the direction of advance of the material to be screened.
  • the rollers comprise a main axis with perpendicular plates fixed to it. Between the various plates, around the axes, there are anti-clogging elements constituted by movable cylindrical tubes whose diameter is longer than that of the axis.
  • the plates may have any shape, that is, they may be circular, elliptic, triangular, quadrangular, pentagonal, hexagonal, etc.
  • each plate is provided with a metal strip perpendicular to the plate itself, so that the section of the plate has the shape of a double T.
  • a double, angled strip can be applied to the plate edge and inclined towards the centre of the plate, so that the section of the plate itself has the shape of a double arrow.
  • the plate edge may also be provided with two lateral strips arranged along the diameter of the plate and perpendicularly to it, instead of the double inclined strip.
  • These double strips may be polygonal, like the plate itself, or annular.
  • the strip/s is/are shaped like a curved ring, while if the plate is polygonal the strip has the shape of a polygonal ring, formed by several plane sections that are as long as the side of the plate/polygon.
  • the various plates are fixed to the roller axis, so that the surface of the plate is perpendicular to the axis length.
  • the anti-clogging elements are inserted around the axis, between each plate pair of each roller.
  • Each anti-clogging element comprises a cylindrical tube whose diameter is longer than the roller axis and whose length is substantially identical to the distance between two adjacent plates of the roller.
  • cylindrical anti-clogging tubes are not fixed to the rollers, but they simply surround the axis section included between two plates and are free to rotate around the roller axis.
  • the plates and/or the cylindrical anti-clogging tubes may be made of metal, plastic or any other suitable material.
  • the pitch between the various plates in the rollers may be the same for all rollers or increase starting from the first rollers towards the final rollers along the course of the objects to be screened.
  • the plane constituted by the various rollers may be fixed with respect to the frame or inclinable by means of hydraulic mechanisms, in such a way as to optimize the screening process.
  • the roller rotation speed is set by the operator and it may be constant, or it may vary in all rollers, or vary according to the position of the rollers at the beginning, at the centre or at the end of the course of the material to be screened.
  • the sorting screen constituted as described above makes it possible to sort solid waste without any problem, since the cylindrical tubes provided on the rollers and the strips present on the plate edges prevent the twisting and entanglement of thin and/or long objects and/or similar elements.
  • the special polygonal shape of the plates and the strip present on the plate edges facilitates the advance of the material to be screened that, due to its size, cannot pass between the least spaced rollers.
  • the new sorting screen can be used for any waste with suitable consistency, like urban solid waste, industrial wastes from the woodworking, plastic, textile sectors, agricultural wastes like compost, algae, grass and loose materials in general.
  • Figure 1a shows an horizontal section of two rollers (1) positioned side by side
  • Figure 1b is an axonometric view of a portion of roller (1).
  • each plate (1.2) has the shape of a double T.
  • the anti-clogging elements constituted by cylindrical tubes (1.3) whose diameter is longer than that of the axis (1.1) are positioned between the various plates (1.2) of the rollers (1), around the axis (1.1).
  • Figure 2 shows an example of the arrangement of the rollers (1) on the frame (2).
  • Figure 3 shows a vertical section of the new sorting screen, where it is possible to observe the frame (2) that supports the rollers (1) and the sides (3) that contain the material to be screened.
  • Figure 4a shows an horizontal section of two rollers (1) positioned side by side
  • Figure 4b is an axonometric view of a portion of roller (1).
  • each plate (1.2) has the shape of a double arrow.
  • the anti-clogging elements constituted by cylindrical tubes (1.3) whose diameter is longer than the axis (1.1) are positioned between the various plates (1.2) of the rollers (1), along the axis (1.1).
  • Figures 5a, 5b and 5c show other possible variants of the invention, in which the lateral strips (2.22, 2.23) are positioned along the diameter of the plate (1.2) and have the shape of a polygon (2.22) or of a ring (2.23).

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Paper (AREA)

Abstract

The invention is a new screen with rollers (1) for sorting solid waste, each roller comprising an axis (1.1) with plates (1.2) parallel to one another and perpendicular to the axis itself, wherein between the rollers of the same axis there is an anti-clogging element (1.3) in the shape of a cylindrical tube, free to travel and substantially parallel to the axis, and wherein the diameter of said anti-clogging element in the shape of a cylindrical tube is longer than the axis and shorter than the diameter of the plates. The edge of said parallel plates (1.2) is provided with a strip (1.21) perpendicular to the plate itself, or a with an inclined double strip, so that the plate has arrow-shaped or T-shaped section along its entire perimeter. The plates may have polygonal, circular or elliptic section. <IMAGE>

Description

  • The present invention concerns the sector of screening and sorting processes and in particular it concerns a new screen for sorting solid waste.
  • Several types of screen are presently used, mainly wire netting screens and screens with plate rollers, such as that disclosed in document DE-U-297 11 724.
  • Wire netting screens comprise a net with meshes with increasing size, through which the material to be screened falls in sequence. Smaller objects pass through the net, that is, they fall first, in the area with finer meshes, while bigger objects fall in the successive areas, where the net has larger meshes.
  • Wire netting screens are expensive due to the fact that the net is dragged and wears out rather quickly, and they also require a material advance system.
  • The screens with plate rollers comprise a series of parallel rollers, each one of which is constituted by an axis with plates fixed to it.
  • The pitch between the rollers and between the plates of the same roller may be constant or increasing.
  • All the rollers are set rotating at the same time and in the same direction. The upper area of each roller rotates towards the rollers that are most spaced and have the most spaced plates.
  • The objects to be screened are put onto the first rollers with reduced pitch, which provide for conveying them towards the rollers with increased pitch. Along their course, the smaller objects fall into the spaces between rollers and plates, while the objects with increasing size pass through the successive rollers and plates.
  • Up to now the screens with plate rollers have been used to screen solid objects, for example stones, but have not been extensively used for the screening of urban solid waste or similar materials, since thin and long objects, like bags, are twisted around the rollers, clogging them and obstructing the spaces between the rollers and between the plates, which obviously makes the screening process useless.
  • In order to eliminate the drawbacks mentioned above, a new type of screen for sorting urban solid waste has been designed and implemented.
  • The new sorting screen comprises, in its main parts, a support and alignment frame, a set of rollers with plates and anti-clogging elements.
  • The frame is constituted by several metal parts and has the function of supporting and aligning all the rollers, of containing the material to be screened and of covering all the members that transmit motion to the rollers. The frame houses the various rollers, which are parallel to one another and whose pitch may be constant or increasing in the direction of advance of the material to be screened.
  • The rollers comprise a main axis with perpendicular plates fixed to it. Between the various plates, around the axes, there are anti-clogging elements constituted by movable cylindrical tubes whose diameter is longer than that of the axis.
  • The plates may have any shape, that is, they may be circular, elliptic, triangular, quadrangular, pentagonal, hexagonal, etc.
  • The edge of each plate is provided with a metal strip perpendicular to the plate itself, so that the section of the plate has the shape of a double T.
  • As an alternative, a double, angled strip can be applied to the plate edge and inclined towards the centre of the plate, so that the section of the plate itself has the shape of a double arrow.
  • As a further variant of the invention, the plate edge may also be provided with two lateral strips arranged along the diameter of the plate and perpendicularly to it, instead of the double inclined strip. These double strips may be polygonal, like the plate itself, or annular.
  • If the plate is circular or elliptic, the strip/s is/are shaped like a curved ring, while if the plate is polygonal the strip has the shape of a polygonal ring, formed by several plane sections that are as long as the side of the plate/polygon.
  • The various plates are fixed to the roller axis, so that the surface of the plate is perpendicular to the axis length.
  • The anti-clogging elements are inserted around the axis, between each plate pair of each roller.
  • Each anti-clogging element comprises a cylindrical tube whose diameter is longer than the roller axis and whose length is substantially identical to the distance between two adjacent plates of the roller.
  • Unlike the plates, the cylindrical anti-clogging tubes are not fixed to the rollers, but they simply surround the axis section included between two plates and are free to rotate around the roller axis.
  • The plates and/or the cylindrical anti-clogging tubes may be made of metal, plastic or any other suitable material.
  • The pitch between the various plates in the rollers may be the same for all rollers or increase starting from the first rollers towards the final rollers along the course of the objects to be screened.
  • The plane constituted by the various rollers may be fixed with respect to the frame or inclinable by means of hydraulic mechanisms, in such a way as to optimize the screening process.
  • The roller rotation speed is set by the operator and it may be constant, or it may vary in all rollers, or vary according to the position of the rollers at the beginning, at the centre or at the end of the course of the material to be screened.
  • The sorting screen constituted as described above makes it possible to sort solid waste without any problem, since the cylindrical tubes provided on the rollers and the strips present on the plate edges prevent the twisting and entanglement of thin and/or long objects and/or similar elements. The special polygonal shape of the plates and the strip present on the plate edges facilitates the advance of the material to be screened that, due to its size, cannot pass between the least spaced rollers.
  • The new sorting screen can be used for any waste with suitable consistency, like urban solid waste, industrial wastes from the woodworking, plastic, textile sectors, agricultural wastes like compost, algae, grass and loose materials in general.
  • The following is just an example among many of the invention in question, illustrated in the enclosed drawings, wherein:
  • Figure 1a shows an horizontal section of two rollers (1) positioned side by side, while Figure 1b is an axonometric view of a portion of roller (1).
  • In both figures it is possible to observe the centre axis (1.1), the plates (1.2) perpendicular to the axis and provided with the strip (1.21) on their edge, so that the section of each plate (1.2) has the shape of a double T. The anti-clogging elements constituted by cylindrical tubes (1.3) whose diameter is longer than that of the axis (1.1) are positioned between the various plates (1.2) of the rollers (1), around the axis (1.1).
  • Figure 2 shows an example of the arrangement of the rollers (1) on the frame (2). Figure 3 shows a vertical section of the new sorting screen, where it is possible to observe the frame (2) that supports the rollers (1) and the sides (3) that contain the material to be screened.
  • Figure 4a shows an horizontal section of two rollers (1) positioned side by side, while Figure 4b is an axonometric view of a portion of roller (1).
  • In both figures it is possible to observe the centre axis (1.1), the plates (1.2) perpendicular to the axis and provided with the strips (2.21) on their edge, so that the section of each plate (1.2) has the shape of a double arrow. The anti-clogging elements constituted by cylindrical tubes (1.3) whose diameter is longer than the axis (1.1) are positioned between the various plates (1.2) of the rollers (1), along the axis (1.1).
  • Figures 5a, 5b and 5c show other possible variants of the invention, in which the lateral strips (2.22, 2.23) are positioned along the diameter of the plate (1.2) and have the shape of a polygon (2.22) or of a ring (2.23).

Claims (9)

  1. Screen for sorting solid waste provided with rollers (1), each roller comprising an axis (1.1) with plates (1.2) parallel to one another and perpendicular to the axis itself, characterized in that between the various rollers of an axis there is an anti-clogging element in the shape of a cylindrical tube (1.3), said anti-clogging element being free to travel and being substantially parallel to the axis, and wherein the diameter of said anti-clogging element in the shape of a cylindrical tube is longer than that of the axis and shorter than the . diameter of the plates.
  2. Screen for sorting solid waste according to claim 1, characterized in that the edge of said parallel plates is provided with a strip (1.21) that is perpendicular to the plate, so that the plate itself has T-shaped section along its entire perimeter.
  3. Screen for sorting solid waste according to claim 1, characterized in that the edge of said plates is provided with two strips (2.21) inclined towards the centre of the plate, so that the plate itself has arrow-shaped section along its entire perimeter.
  4. Screen for sorting solid waste according to claim 1, characterized in that the diameter of the plates is provided with two strips (2.22) that are perpendicular to the plate, so that the plate itself has cross-shaped section along its entire perimeter
  5. Screen for sorting solid waste according to claim 1, 2, 3 or 4, characterized in that the plates have polygonal section.
  6. Screen for sorting solid waste according to claim 1, 2, 3 or 4, characterized in that the plates have circular section.
  7. Screen for sorting solid waste according to claim 1, 2, 3 or 4, characterized in that the plates have elliptic section.
  8. Screen for sorting solid waste according to claim 2, 3 or 4, characterized in that the lateral strips are polygonal, like the plates.
  9. Screen for sorting solid waste according to claim 2, 3 or 4, characterized in that the lateral strips (2.23) are annular.
EP00125944A 1999-12-01 2000-11-28 Screen for sorting solid waste Expired - Lifetime EP1106264B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00125944T DK1106264T3 (en) 1999-12-01 2000-11-28 Solids for sorting solid waste

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITPD990268 1999-12-01
ITPD990268 IT1306697B1 (en) 1999-12-01 1999-12-01 Screen for sorting solid waste has cylindrical tube-shaped anti-clogging element being free to travel and parallel to axis, and being longer than axis and shorter than diameter of plates
ITPD20000095 IT1315426B1 (en) 2000-04-17 2000-04-17 Screen for sorting solid waste has cylindrical tube-shaped anti-clogging element being free to travel and parallel to axis, and being longer than axis and shorter than diameter of plates
ITPD000095 2000-04-17

Publications (3)

Publication Number Publication Date
EP1106264A2 EP1106264A2 (en) 2001-06-13
EP1106264A3 EP1106264A3 (en) 2002-06-26
EP1106264B1 true EP1106264B1 (en) 2005-01-19

Family

ID=26331888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00125944A Expired - Lifetime EP1106264B1 (en) 1999-12-01 2000-11-28 Screen for sorting solid waste

Country Status (5)

Country Link
EP (1) EP1106264B1 (en)
AT (1) ATE287297T1 (en)
DE (1) DE60017535T2 (en)
DK (1) DK1106264T3 (en)
ES (1) ES2235745T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120325729A1 (en) * 2009-10-14 2012-12-27 Ecostar S.R.L. Screen For Separating Solid Materials
US11642701B2 (en) 2020-06-12 2023-05-09 Ecostar S.R.L. Disc screen for separating solid materials

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005018995C5 (en) * 2004-04-24 2008-07-03 Anlagenbau Günther GmbH disc screen
DE202009010983U1 (en) * 2009-05-07 2011-06-15 Doppstadt Familienholding GmbH, 42555 Screening machine, in particular star screening machine
DE102012012979A1 (en) 2012-06-29 2014-01-02 Martin Hirschauer Method and device for program-controlled fractionation of recycled material
DE202012006328U1 (en) 2012-06-29 2012-07-09 Martin Hirschauer Device for program-controlled fractionation of recycled material
EP2926915B1 (en) * 2014-03-27 2017-08-30 Promeco Energy & Plants SRL Screen with disk rollers
ITPD20150086A1 (en) 2015-04-23 2016-10-23 Ecostar Srl DISC SCREEN FOR THE SEPARATION OF SOLID MATERIALS
US9764359B2 (en) 2015-06-22 2017-09-19 Ecostar S.R.L. Screen for separating solid materials
FI126489B (en) * 2015-11-10 2017-01-13 Bmh Tech Oy Disc separator and material entanglement preventant to be mounted on a disc strainer
ITUA20164184A1 (en) * 2016-06-08 2017-12-08 Promeco Spa Disc roller separator screen.
BE1024663B1 (en) * 2016-10-18 2018-05-22 Rentec Nv SEA FISHERY WITH RENEWED SET OF DISPLAY ELEMENTS
CN109292458B (en) * 2018-11-26 2024-10-18 郑州金诚信筛网设备有限公司 Air seal device with anti-blocking mechanism
IT201900013791A1 (en) 2019-08-02 2021-02-02 Ecostargreen S R L DISC SCREEN FOR THE SEPARATION OF SOLID MATERIALS
IT202000021796A1 (en) 2020-09-16 2022-03-16 O M D Srl IMPROVED SCREENING SYSTEM FOR GLASS RECOVERY
IT202200006128A1 (en) 2022-03-29 2023-09-29 Ecostargreen S R L PLANT FOR THE SEPARATION OF SOLID MATERIALS INTO SEVERAL FRACTIONS AND PROCEDURE FOR SEPARATEING SOLID MATERIALS INTO SEVERAL FRACTIONS BY MEANS OF SAID PLANT

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722314A (en) * 1954-08-31 1955-11-01 Kenneth R Bixby Non-blinding screen
DE29711724U1 (en) * 1997-07-04 1997-09-04 Kronenberger, Ernst Josef, 66706 Perl Scraper for a disc sieve or a disc separator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120325729A1 (en) * 2009-10-14 2012-12-27 Ecostar S.R.L. Screen For Separating Solid Materials
JP2013505829A (en) * 2009-10-14 2013-02-21 エコスター エス．アール．エル． Solid material separation screen
US8627962B2 (en) * 2009-10-14 2014-01-14 Ecostar S.R.L. Screen for separating solid materials
US11642701B2 (en) 2020-06-12 2023-05-09 Ecostar S.R.L. Disc screen for separating solid materials

Also Published As

Publication number Publication date
DK1106264T3 (en) 2005-04-25
EP1106264A2 (en) 2001-06-13
EP1106264A3 (en) 2002-06-26
DE60017535D1 (en) 2005-02-24
ES2235745T3 (en) 2005-07-16
DE60017535T2 (en) 2006-03-23
ATE287297T1 (en) 2005-02-15

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