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WO2003039773A1 - A method for sorting out waste bags and a device for carrying out the method - Google Patents

A method for sorting out waste bags and a device for carrying out the method Download PDF

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Publication number
WO2003039773A1
WO2003039773A1 PCT/SE2002/000833 SE0200833W WO03039773A1 WO 2003039773 A1 WO2003039773 A1 WO 2003039773A1 SE 0200833 W SE0200833 W SE 0200833W WO 03039773 A1 WO03039773 A1 WO 03039773A1
Authority
WO
WIPO (PCT)
Prior art keywords
waste
sacks
sorting
identification
conveyor belt
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.)
Ceased
Application number
PCT/SE2002/000833
Other languages
French (fr)
Inventor
Christian TORÄNG
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.)
OPTIBAG SYSTEMS AB
Original Assignee
OPTIBAG SYSTEMS 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 OPTIBAG SYSTEMS AB filed Critical OPTIBAG SYSTEMS AB
Priority to DE60229152T priority Critical patent/DE60229152D1/en
Priority to DK02802753T priority patent/DK1429874T3/en
Priority to EP02802753A priority patent/EP1429874B1/en
Publication of WO2003039773A1 publication Critical patent/WO2003039773A1/en
Priority to NO20040943A priority patent/NO325317B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour

Definitions

  • the present invention relates to a method according to the pre-characterising clause of claim 1.
  • the present invention also relates to an arrangement according to the pre-characterising clause of claim 3.
  • Sorting at source therefore generates various fractions, which are often transported together to a sorting plant for sorting in a waste sorting arrangement. It is important, in the case of a waste sorting arrangement, that this has the capacity to separate and sort out the various types of fractions sorted at source, and that this sorting is performed with as few errors as possible. It is also advantageous if such a waste sorting arrangement is designed so that it can be readily expanded to include more types of waste fractions.
  • An arrangement for sorting sacks is already disclosed, for example, by SE 9401754-8.
  • This document discloses an arrangement for sorting differently coloured waste sacks, which occur in random distributions and contain different types of waste sorted at source.
  • This arrangement comprises sorting stations, which by means of a colour analysis described in SE 9500165-7 identify and then separate waste sacks of a predetermined colour, which are conveyed on a conveyor belt.
  • the arrangement does not comprise any control mechanism after sorting to ensure that separation has been performed correctly, that is to say that only waste sacks of the predetermined colour have been sorted out.
  • the object of the present invention is to provide greater sorting accuracy in the sorting of waste sacks. This is achieved by a method which has the characteristics specified in the characterising part of claim 1. An arrangement for performing the method has the characteristics specified in the characterising part of claim 3.
  • 1 denotes a load hopper intended for unsorted waste sacks, the hopper being connected to a slatted conveyor 2 for conveying waste sacks to a distributing conveyor 3.
  • 4 denotes an acceleration bar, which receives waste sacks from the distributing conveyor 3 and is designed to separate the waste sacks from one another so that they are placed on a first conveyor belt 5 at a certain interval from one another.
  • a first sorting arrangement 6 is arranged along the first conveyor belt 5 and is designed to sort out waste sacks of a predetermined colour.
  • Waste sacks of different colours contain different types of refuse sorted at source and in the load hopper 1 the differently coloured waste sacks occur in random distributions.
  • the waste sacks must be placed on the first conveyor belt 5, which conveys the waste sacks for sorting in the first sorting arrangement 6.
  • the waste sacks must be placed on the first conveyor 5 in such a way that two sacks do not end up alongside one another or on top of one another.
  • the waste sacks from the load hopper 1 are conveyed to the distributing conveyor by the slatted conveyor 2.
  • the distributing conveyor 3 distributes the waste sacks to the acceleration bar 2, which must ensure that two sacks do not lie too close or on top of on another on the first conveyor belt 5.
  • the waste sacks should be spaced at an interval of at least 0.5 m from one another on the first conveyor belt 5.
  • the sorting arrangement 6 uses sensors to detect when waste sacks of a predetermined colour on the first conveyor belt 5 reach and pass a certain position in the first sorting arrangement 6, and then actuates elements for removing the sack from the first conveyor belt 5. In this sorting, however, it may happen that a waste sack of a colour other than the predetermined colour is removed from the first conveyor belt 5. This occurs, despite the use of the acceleration bar 4, due to the fact that sacks lie too close to one another, so that a sack with a colour other than the predetermined colour is caught up with a sack of the predetermined colour when the later is separated out.
  • a second conveyor belt 7 is arranged beneath the first sorting arrangement 6 and a second sorting arrangement 8 is arranged along the second conveyor belt 7.
  • 9 denotes a third conveyor belt, which is arranged beneath the second sorting arrangement 8 and is connected to the load hopper 1.
  • the second conveyor belt 7 is designed to receive all sacks separated out by the first sorting arrangement 6 and to convey these to the second sorting arrangement 8, which is designed to enhance the sorting accuracy by sorting waste sacks of different colours.
  • the second sorting arrangement 8 functions in a manner known in the art and is designed to identify and separate the sacks incorrectly sorted out by the sorting arrangement 6, that is to say to separate the sacks on the second conveyor belt that are of a colour other than the predetermined colour, to which the first sorting arrangement is sensitive.
  • the second sorting arrangement 8 must therefore be sensitive to all colours other than the colour to which the first sorting arrangement 6 is sensitive.
  • the sacks sorted out by the second sorting arrangement 8 are received by the third conveyor belt 9, which conveys the sacks incorrectly sorted out by the first sorting arrangement 6 back to the load hopper 1.
  • the returned sacks can then be conveyed to the first sorting arrangement 6 again for renewed sorting.
  • an arrangement according to the invention may comprise more than one first conveyor belt 5, which increases the sorting capacity, and more than one first sorting arrangement 6, which increases the number of different types of waste that can be sorted out.
  • the embodiment shown in Figure 1 comprises two parallel first conveyor belts 5 and two first sorting arrangements 6 and 6' along each of the first conveyor belts 5.
  • the sorting along the two conveyor belts 5 is preferably structured identically, that is to say the two first sorting arrangements 6 are both sensitive to the same predetermined colour and the two first sorting arrangements 6' are both sensitive to the same predetermined colour.
  • Running under the two first sorting arrangements 6 is a second conveyor belt 7, which receives sacks moved from the two first conveyor belts 5.
  • a second conveyor belt 7 similarly runs beneath both of the first sorting arrangements 6'.
  • a second sorting arrangement 8 and 8' respectively is designed to sort out the sacks incorrectly sorted out from the first sorting arrangements 6 and 6' and to increase the sorting accuracy.

Landscapes

  • Sorting Of Articles (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Discharge Of Articles From Conveyors (AREA)

Abstract

The present invention relates to a method and an arrangement for sorting waste sacks provided with means of identification, the waste sacks with different means of identification containing different types of waste sorted at a source. The waste sacks are conveyed ranged in a row one after another on a first conveyor belt (5) past at least one first sorting station (6), which is arranged along the conveyor belt (5). The first sorting station (6) comprises sensors, which detect when waste sacks having a predetermined means of identification reach and pass a predetermined position at the first sorting station (6) and actuate elements for moving waste sacks having the predetermined means of identification from the conveyor belt (5). The separated waste sacks are received and conveyed onwards on a second conveyor belt (7). A second sorting station (8), which in the same way as the first sorting station (6) identifies and separates waste sacks having a means of identification other than the predetermined means of identification, is arranged in connection with the second conveyor belt (7).

Description

A method for sorting out waste bags and a device for carrying out the method
The present invention relates to a method according to the pre-characterising clause of claim 1.
The present invention also relates to an arrangement according to the pre-characterising clause of claim 3.
Today's production-based society produces large volumes of waste, which often contains large quantities of environmentally harmful substances. Industrial waste and domestic refuse therefore constitute a great burden on the environment and in order to protect the environment as far as possible from stresses imposed on it, efficient systems are needed for handling waste, that is for recycling, destroying and tipping it. One prerequisite for achieving such efficient systems is that environmentally correct handling be undertaken at source. This consequently requires highly responsible handling and sorting of waste in domestic households and also subsequent handling of the waste sorted at source.
Domestic households nowadays sort their refuse at source into various categories, such as paper, cardboard, batteries, coloured glass, plain glass, plastic packaging and environmentally hazardous waste. Sorting at source therefore generates various fractions, which are often transported together to a sorting plant for sorting in a waste sorting arrangement. It is important, in the case of a waste sorting arrangement, that this has the capacity to separate and sort out the various types of fractions sorted at source, and that this sorting is performed with as few errors as possible. It is also advantageous if such a waste sorting arrangement is designed so that it can be readily expanded to include more types of waste fractions.
An arrangement for sorting sacks is already disclosed, for example, by SE 9401754-8. This document discloses an arrangement for sorting differently coloured waste sacks, which occur in random distributions and contain different types of waste sorted at source. This arrangement comprises sorting stations, which by means of a colour analysis described in SE 9500165-7 identify and then separate waste sacks of a predetermined colour, which are conveyed on a conveyor belt. The arrangement, however, does not comprise any control mechanism after sorting to ensure that separation has been performed correctly, that is to say that only waste sacks of the predetermined colour have been sorted out. In the sorting it may happen that sacks of a colour other than the predetermined colour are sorted out, due to the fact that they are situated in close proximity to one another on the conveyor belt or on top of one another on the conveyor belt, or because some other error occurs in the identification/sorting.
The object of the present invention is to provide greater sorting accuracy in the sorting of waste sacks. This is achieved by a method which has the characteristics specified in the characterising part of claim 1. An arrangement for performing the method has the characteristics specified in the characterising part of claim 3.
The invention will be explained in more detail below for waste sacks of different colours and with reference to the drawing attached, in which one embodiment of an arrangement according to the invention viewed from above is shown diagrammatically in plan view.
In the drawing, 1 denotes a load hopper intended for unsorted waste sacks, the hopper being connected to a slatted conveyor 2 for conveying waste sacks to a distributing conveyor 3. 4 denotes an acceleration bar, which receives waste sacks from the distributing conveyor 3 and is designed to separate the waste sacks from one another so that they are placed on a first conveyor belt 5 at a certain interval from one another. A first sorting arrangement 6 is arranged along the first conveyor belt 5 and is designed to sort out waste sacks of a predetermined colour.
Domestic refuse sorted at source into differently coloured waste sacks, which must be sorted in a sorting facility by means of an arrangement according to one embodiment of the present invention, is placed in the load hopper 1. Waste sacks of different colours contain different types of refuse sorted at source and in the load hopper 1 the differently coloured waste sacks occur in random distributions. In sorting, the waste sacks must be placed on the first conveyor belt 5, which conveys the waste sacks for sorting in the first sorting arrangement 6. The waste sacks must be placed on the first conveyor 5 in such a way that two sacks do not end up alongside one another or on top of one another.
According to the embodiment shown in the drawing, the waste sacks from the load hopper 1 are conveyed to the distributing conveyor by the slatted conveyor 2. The distributing conveyor 3 distributes the waste sacks to the acceleration bar 2, which must ensure that two sacks do not lie too close or on top of on another on the first conveyor belt 5. In order for the first sorting arrangement to function correctly, the waste sacks should be spaced at an interval of at least 0.5 m from one another on the first conveyor belt 5.
In a manner already known in the art, the sorting arrangement 6 uses sensors to detect when waste sacks of a predetermined colour on the first conveyor belt 5 reach and pass a certain position in the first sorting arrangement 6, and then actuates elements for removing the sack from the first conveyor belt 5. In this sorting, however, it may happen that a waste sack of a colour other than the predetermined colour is removed from the first conveyor belt 5. This occurs, despite the use of the acceleration bar 4, due to the fact that sacks lie too close to one another, so that a sack with a colour other than the predetermined colour is caught up with a sack of the predetermined colour when the later is separated out.
According to the present invention a second conveyor belt 7 is arranged beneath the first sorting arrangement 6 and a second sorting arrangement 8 is arranged along the second conveyor belt 7. 9 denotes a third conveyor belt, which is arranged beneath the second sorting arrangement 8 and is connected to the load hopper 1.
The second conveyor belt 7 is designed to receive all sacks separated out by the first sorting arrangement 6 and to convey these to the second sorting arrangement 8, which is designed to enhance the sorting accuracy by sorting waste sacks of different colours. Like the first sorting arrangement 6, the second sorting arrangement 8 functions in a manner known in the art and is designed to identify and separate the sacks incorrectly sorted out by the sorting arrangement 6, that is to say to separate the sacks on the second conveyor belt that are of a colour other than the predetermined colour, to which the first sorting arrangement is sensitive. The second sorting arrangement 8 must therefore be sensitive to all colours other than the colour to which the first sorting arrangement 6 is sensitive. The sacks sorted out by the second sorting arrangement 8 are received by the third conveyor belt 9, which conveys the sacks incorrectly sorted out by the first sorting arrangement 6 back to the load hopper 1. The returned sacks can then be conveyed to the first sorting arrangement 6 again for renewed sorting.
According to the embodiment shown in Figure 1, an arrangement according to the invention may comprise more than one first conveyor belt 5, which increases the sorting capacity, and more than one first sorting arrangement 6, which increases the number of different types of waste that can be sorted out. The embodiment shown in Figure 1 comprises two parallel first conveyor belts 5 and two first sorting arrangements 6 and 6' along each of the first conveyor belts 5. The sorting along the two conveyor belts 5 is preferably structured identically, that is to say the two first sorting arrangements 6 are both sensitive to the same predetermined colour and the two first sorting arrangements 6' are both sensitive to the same predetermined colour. Running under the two first sorting arrangements 6 is a second conveyor belt 7, which receives sacks moved from the two first conveyor belts 5. A second conveyor belt 7 similarly runs beneath both of the first sorting arrangements 6'. Along each of the two second conveyor belts 7 a second sorting arrangement 8 and 8' respectively is designed to sort out the sacks incorrectly sorted out from the first sorting arrangements 6 and 6' and to increase the sorting accuracy.
It should be obvious that the embodiment described above is only one example of an embodiment of the present invention and that sorting can be performed on the basis of other means of identification of the waste sacks and that the feed mechanism, for example, can be replaced by some other mechanism. It should be further apparent that the invention can also be expanded to include more parallel first conveyor belts in order to further increase the sorting capacity and more first sorting arrangements in order to increase the number of different types of waste that can be sorted out.

Claims

Claims
1. Method of sorting waste sacks provided with means of identification and occurring in random distributions, the waste sacks with different means of identification containing different types of waste sorted at source, which method involves conveying the waste sacks ranged in a row one after another for successive sorting, waste sacks having a predetermined means of identification being identified and separated from the other waste sacks conveyed, characterised in that the waste sacks that are separated in a first sorting of the waste sacks are conveyed onwards for a further sorting, so that waste sacks having a means of identification other than the predetermined means of identification are identified and separated.
2. Method according to claim 1, characterised in that the waste sacks that are separated when the waste sacks are sorted a second time are conveyed back for renewed sorting.
3. Arrangement for sorting waste sacks provided with means of identification and occurring in random distributions, the waste sacks with different means of identification containing different types of waste sorted at source, the arrangement comprising a first conveyor belt (5) designed to convey the sacks ranged in a row one after another past at least one first sorting station (6), which is arranged along the said conveyor belt and is designed to identify and separate predetermined types of waste from the conveyor (5), the first sorting station (6) comprising sensors designed to detect when waste sacks having a predetermined means of identification reach and pass a predetermined position at the first sorting station (6) and to actuate elements for moving waste sacks having the predetermined means of identification from the first conveyor belt (5), characterised in that the arrangement comprises a second conveyor belt (7) designed to receive sacks moved from the first conveyor belt (5) and connected to the second conveyor belt (7) a second sorting station (8), which comprises sensors designed to detect when waste sacks having a means of identification other than the predetermined means of identification reach and pass a predetermined position at the second sorting station (8) and to actuate elements for moving waste sacks having a means of identification other than the predetermined means of identification from the second conveyor belt (7).
4. Arrangement according to Claim 3, characterised in that the arrangement comprises a third conveyor belt (9) designed to receive the sacks moved from the second conveyor belt (7) and to convey these back for renewed sorting.
PCT/SE2002/000833 2001-09-24 2002-04-29 A method for sorting out waste bags and a device for carrying out the method Ceased WO2003039773A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE60229152T DE60229152D1 (en) 2001-09-24 2002-04-29 METHOD FOR SORTING WASTE BAGS AND DEVICE FOR CARRYING OUT THE METHOD
DK02802753T DK1429874T3 (en) 2001-09-24 2002-04-29 Process for sorting waste bags and device for carrying out the process
EP02802753A EP1429874B1 (en) 2001-09-24 2002-04-29 A method for sorting out waste bags and a device for carrying out the method
NO20040943A NO325317B1 (en) 2001-09-24 2004-03-04 Process for sorting out waste bags and arrangement for carrying out the process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0103165-7 2001-09-24
SE0103165A SE0103165L (en) 2001-09-24 2001-09-24 Method of sorting waste bags and apparatus for carrying out the method

Publications (1)

Publication Number Publication Date
WO2003039773A1 true WO2003039773A1 (en) 2003-05-15

Family

ID=20285417

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/000833 Ceased WO2003039773A1 (en) 2001-09-24 2002-04-29 A method for sorting out waste bags and a device for carrying out the method

Country Status (7)

Country Link
EP (1) EP1429874B1 (en)
AT (1) ATE409528T1 (en)
DE (1) DE60229152D1 (en)
DK (1) DK1429874T3 (en)
NO (1) NO325317B1 (en)
SE (1) SE0103165L (en)
WO (1) WO2003039773A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006096101A1 (en) 2005-03-11 2006-09-14 Optibag Systems Ab Waste container and arrangement, method and system for sorting of such waste containers
WO2010112669A1 (en) 2009-04-03 2010-10-07 Maricap Oy Method and means in waste handling
WO2010112668A1 (en) 2009-04-03 2010-10-07 Maricap Oy Waste handling system and method
WO2011029991A2 (en) 2009-09-14 2011-03-17 Maricap Oy Method and apparatus for sorting wastes
WO2016024043A1 (en) 2014-08-13 2016-02-18 Metrosense Oy Method, apparatus and system for sorting waste
WO2016097014A1 (en) * 2014-12-17 2016-06-23 Envac Optibag Ab Sorting system with multiple sorting devices
CN110525842A (en) * 2019-09-12 2019-12-03 深圳市盘龙环境技术有限公司 The automatic classification managing system of Bulky Waste

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524476C2 (en) * 2002-12-04 2004-08-17 Optibag Systems Ab Method and apparatus for sorting waste bags

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE467394B (en) * 1991-10-07 1992-07-13 Wahlquists Verkstaeder Ab DEVICE FOR SORTING OF WASTE WASTE
SE500076C2 (en) * 1989-03-23 1994-04-11 Sellbergs Engineering Ab Ways to dispose of waste
SE507257C2 (en) * 1995-01-19 1998-05-04 Wahlquists Verkstaeder Ab Method and apparatus for detecting a predetermined color
SE508007C2 (en) * 1994-05-20 1998-08-10 Wahlquists Verkstaeder Ab Device for sorting waste bags

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500076C2 (en) * 1989-03-23 1994-04-11 Sellbergs Engineering Ab Ways to dispose of waste
SE467394B (en) * 1991-10-07 1992-07-13 Wahlquists Verkstaeder Ab DEVICE FOR SORTING OF WASTE WASTE
SE508007C2 (en) * 1994-05-20 1998-08-10 Wahlquists Verkstaeder Ab Device for sorting waste bags
SE507257C2 (en) * 1995-01-19 1998-05-04 Wahlquists Verkstaeder Ab Method and apparatus for detecting a predetermined color

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006096101A1 (en) 2005-03-11 2006-09-14 Optibag Systems Ab Waste container and arrangement, method and system for sorting of such waste containers
WO2010112669A1 (en) 2009-04-03 2010-10-07 Maricap Oy Method and means in waste handling
WO2010112668A1 (en) 2009-04-03 2010-10-07 Maricap Oy Waste handling system and method
WO2011029991A2 (en) 2009-09-14 2011-03-17 Maricap Oy Method and apparatus for sorting wastes
US9120131B2 (en) 2009-09-14 2015-09-01 Maricap Oy Method and apparatus for sorting wastes
WO2016024043A1 (en) 2014-08-13 2016-02-18 Metrosense Oy Method, apparatus and system for sorting waste
KR20170040355A (en) 2014-08-13 2017-04-12 메트로센스 오이 Method, apparatus and system for sorting waste
US10464105B2 (en) 2014-08-13 2019-11-05 Metrosense Oy Method, apparatus and system for sorting waste
WO2016097014A1 (en) * 2014-12-17 2016-06-23 Envac Optibag Ab Sorting system with multiple sorting devices
CN107206432A (en) * 2014-12-17 2017-09-26 恩华特光学袋公司 Sorting system with multiple sorting equipments
US11077470B2 (en) 2014-12-17 2021-08-03 Envac Optibag Ab Sorting system with multiple sorting devices
CN110525842A (en) * 2019-09-12 2019-12-03 深圳市盘龙环境技术有限公司 The automatic classification managing system of Bulky Waste

Also Published As

Publication number Publication date
ATE409528T1 (en) 2008-10-15
DK1429874T3 (en) 2009-02-02
NO325317B1 (en) 2008-03-31
DE60229152D1 (en) 2008-11-13
EP1429874B1 (en) 2008-10-01
SE0103165D0 (en) 2001-09-24
SE517667C2 (en) 2002-07-02
NO20040943L (en) 2004-04-16
SE0103165L (en) 2002-07-02
EP1429874A1 (en) 2004-06-23
NO20040943D0 (en) 2004-03-04

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