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WO1999053771A1 - An apparatus and a method for separating particular objects from a mixture of objects - Google Patents

An apparatus and a method for separating particular objects from a mixture of objects Download PDF

Info

Publication number
WO1999053771A1
WO1999053771A1 PCT/IS1999/000008 IS9900008W WO9953771A1 WO 1999053771 A1 WO1999053771 A1 WO 1999053771A1 IS 9900008 W IS9900008 W IS 9900008W WO 9953771 A1 WO9953771 A1 WO 9953771A1
Authority
WO
WIPO (PCT)
Prior art keywords
objects
band
conveyor
affinity
conveyor band
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/IS1999/000008
Other languages
French (fr)
Inventor
Omar Gunnarsson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU37281/99A priority Critical patent/AU3728199A/en
Publication of WO1999053771A1 publication Critical patent/WO1999053771A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
    • B07B13/11—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/90—Sorting, grading, counting or marking live aquatic animals, e.g. sex determination
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
    • A22C25/04—Sorting fish; Separating ice from fish packed in ice
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
    • A22C25/08—Holding, guiding, or conveying fish before, during or after its preparation ; Devices for sizing fish; Automatically adapting conveyors or processing machines to the measured size
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/005—Grading or classifying shellfish or bivalves
    • 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

  • a method for separating particular objects from a mixture of objects the objects having different properties, in particular surface characteristic.
  • the objects can be shellfish such as shrimp mixed with other small fish species and juveniles.
  • the objects are separated during their transport along a conveyor system.
  • lantern fish is the main in-mix species. Measurements have shown that at times when fishing shrimp more thatn 40% of the catch can be in-mix species. Untill recently it has been economically unfeasiable to separate the in-mix species from the shirmp, aboard the fishing vessel. The only known method has been to handpick the in-mixed fish from the shellfish. When the percentage of in-mix is high the only economical option has been to return the catch back to the sea. This is not acceptable for those nations pursuing sustainable fishing policy.
  • the aim of the invention is to set forth an apparatus and a method for separating small fish species and juveniles from shellfish catches such as shrimp and thus increase the value of the catch.
  • This aim is achived by the invention being characterised in that in that the objects are directed onto an upwardly incline conveyor band, said conveying band being continuouesly moved in the upward incline direction, the particular objects to be separated having less affinity to the surface of the band slide downward against the movement of the band, whereas other objects having higher affinity to the surface of the band move upward with the band, thus the objects are directed into two groups, one at the lower end of the conveyor band where the particular objects having less affinty can be collected and the other at the upper end of the band where the other objects with higher affinity are collected.
  • the invention is characterised in that the inclination of the conveyor band (2) is greater than the reference surface affinity inclintaion of the particular object, being shellfish such as shrimp, but less than the reference surface affinity inclinitaion of the objects to be sepparated out.
  • the invention is characterised in that the inclination of the conveyor band is 1 50 - 60° from horizontal plane, in particular, 25 - 55°, most preffererd 30 - 40°.
  • the invention is characterised in that one or more incline conveyor band are aranged at the upper and/or lower end of the first inclined separating conveyor band for further separation of the objects.
  • the invention is characterised in that the surface of the conveyor band being partly open and the surface of the conveyor band being subject to vibration and/or air blow or heating.
  • Figure 1 shows the arrangement of a conveyor bands for separating shrimp from small fish species and juveniles
  • Figure 2 shows arrangement of a number of inclined conveyor bands for separation shrimp from small fish species
  • Figurer 1 shows a conveyor system ( 1 ) where a mixture of shrimp and small fish species are transported.
  • the mixtuer is moved on an in-feed conveyor band (6) and lifted upward to obtain a hight difference in relation to the first conveyor separation band (2).
  • Shrimp and small fish species fall from the end of the infeed conveyor band (6), onto the first conveyor separation band (2).
  • the band (2) is arranged in an upwardly inclined direction (3).
  • the inclination ( ⁇ ) of the conveyor band is greater than the reference surface affinity inclination for shrimp, but less than the referance surface affinity inclination for fish species to be out-separated.
  • Reference surface affinity inclination is here defined as the inclination of a surface where an object slides down a particular surface.
  • This inclination can be altered by altering the upward movement of the surface as well as the surface characteristic of the band.
  • the objects to be separated are directed to the opposite ends of the separation conveyor band (2).
  • the speed of the conveyor belt can be increased or decreased as well as the slope of the band.
  • Figure 2 shows a number of transport bands (2, 1 3, 1 4) for separating shrimp from small fish species.
  • the bands are arranged one after the other.
  • second conveyor band By arranging second conveyor band in series with the upper and/or the lower end of the first separation band, the separation can be further improved.
  • Shrimp has an hard outer shell where as most other fish species have slime on their surface. Therefor shrimp has less affinity to some surface whereas fish has greater affinity.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Food Science & Technology (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Processing Of Meat And Fish (AREA)

Abstract

A method for separating particular objects from a mixture of objects. The objects having different properties, in particular surface characteristics. The objects can be for instance shellfish such as shrimp mixed with other spices and juveniles. The objects are separated during their transportation along a conveyor system. The objects are directed onto an upwardly inclined conveyor band (2), said conveying band being continuously moved in the upward inclined direction (3). The particular objects to be separated have less affinity to the surface of the band slide downward against the movement of the band, whereas other objects have higher affinity to the surface of the band move upward with the band, thus the objects are directed into two groups.

Description

An apparatus and a method for separating particular objects from a mixture of objects
Technical Field
A method for separating particular objects from a mixture of objects, the objects having different properties, in particular surface characteristic. The objects can be shellfish such as shrimp mixed with other small fish species and juveniles. The objects are separated during their transport along a conveyor system.
Background of the invention
It is quiet common that other fish species are mixed into the catches of shellfis such as shirmp. It is relatively easy to separate by hand large fishes from the catch, but although most trawls for catching shellfish such as shrimp are now equiped with separators to enhance the outslip of small/large fish, different percentage of small/large fish does land in the trawl bag.
In Icelandic waters capilion and round fish juveniels are the in-mixed species, but on the Flemish Hat, close to New Foundland in Canada, lantern fish is the main in-mix species. Measurements have shown that at times when fishing shrimp more thatn 40% of the catch can be in-mix species. Untill recently it has been economically unfeasiable to separate the in-mix species from the shirmp, aboard the fishing vessel. The only known method has been to handpick the in-mixed fish from the shellfish. When the percentage of in-mix is high the only economical option has been to return the catch back to the sea. This is not acceptable for those nations pursuing sustainable fishing policy. Processing shrimp aboard a fishing vessel containing more that a few percentage of foreign species almost invariably alters the taste of the shrimp and thus lower the selling price. Processors on land purchasing shellfish such as shirmp from a fishing vessel, offers considerably lower price if the the shirmp has in-mix of foreign species. Detailed descriptinon of the invention
The aim of the invention is to set forth an apparatus and a method for separating small fish species and juveniles from shellfish catches such as shrimp and thus increase the value of the catch.
This aim is achived by the invention being characterised in that in that the objects are directed onto an upwardly incline conveyor band, said conveying band being continuouesly moved in the upward incline direction, the particular objects to be separated having less affinity to the surface of the band slide downward against the movement of the band, whereas other objects having higher affinity to the surface of the band move upward with the band, thus the objects are directed into two groups, one at the lower end of the conveyor band where the particular objects having less affinty can be collected and the other at the upper end of the band where the other objects with higher affinity are collected.
Further the invention is characterised in that the inclination of the conveyor band (2) is greater than the reference surface affinity inclintaion of the particular object, being shellfish such as shrimp, but less than the reference surface affinity inclinitaion of the objects to be sepparated out.
Moreover the invention is characterised in that the inclination of the conveyor band is 1 50 - 60° from horizontal plane, in particular, 25 - 55°, most preffererd 30 - 40°.
Also the invention is characterised in that one or more incline conveyor band are aranged at the upper and/or lower end of the first inclined separating conveyor band for further separation of the objects. At last the invention is characterised in that the surface of the conveyor band being partly open and the surface of the conveyor band being subject to vibration and/or air blow or heating.
General description of the drawings
Figure 1 shows the arrangement of a conveyor bands for separating shrimp from small fish species and juveniles,
Figure 2 shows arrangement of a number of inclined conveyor bands for separation shrimp from small fish species,
More detailed description of the drawings with one particular embodiement of the invention Figurer 1 shows a conveyor system ( 1 ) where a mixture of shrimp and small fish species are transported. The mixtuer is moved on an in-feed conveyor band (6) and lifted upward to obtain a hight difference in relation to the first conveyor separation band (2). Shrimp and small fish species fall from the end of the infeed conveyor band (6), onto the first conveyor separation band (2). The band (2) is arranged in an upwardly inclined direction (3). The inclination (β) of the conveyor band is greater than the reference surface affinity inclination for shrimp, but less than the referance surface affinity inclination for fish species to be out-separated. Reference surface affinity inclination is here defined as the inclination of a surface where an object slides down a particular surface. This inclination can be altered by altering the upward movement of the surface as well as the surface characteristic of the band. The objects to be separated are directed to the opposite ends of the separation conveyor band (2). The shrimp slides down and falls of the lower end (4) where it is collected, but the fish to be separated is movend on the conveyor band to the upper end (5) where it is collected. By simple adjustment of the apparatus the speed of the conveyor belt can be increased or decreased as weil as the slope of the band.
Figure 2 shows a number of transport bands (2, 1 3, 1 4) for separating shrimp from small fish species. The bands are arranged one after the other. By arranging second conveyor band in series with the upper and/or the lower end of the first separation band, the separation can be further improved.
There is a differece in surface characteristic for shrimp and some other fishs species. Shrimp has an hard outer shell where as most other fish species have slime on their surface. Therefor shrimp has less affinity to some surface whereas fish has greater affinity.
To increase the effect of the method and apparatus one can arrange vibration of the band and thereby lift or release shirmp sticking to the band and enhance the downward movement ot the shrimp. Similarly one can blow air to or through the band. One can heat or dry the surface of the band to increase the affinity of the fish species to be separated.
The invention described here above is not limited to precisely those details which have been specified, but can be elaborated upon in many ways without deviating from the central concept and spirit of the invention as defined in the patent claims below.

Claims

5 Patent claims
1. A method for separating particular objects from a mixture of objects, the objects having different properties, in particular surface characteristic, the particular objects being shellfish such as shrimps mixed with other spices and juveniles, where the objects are transported on a conveyor system (1), characterised in that the objects being directed onto an upwardly inclined conveyor band (2), said conveyor band being continuously moved in the upward incline direction (3), the particular objects to be separated having less affinity to the surface of the band slide downward against the movement of the band, whereas other objects having higher affinity to the surface of the band move upward with the band, thus the objects are directed into twς groups, one at the lower end (4) of the conveyor band where the particular objects having less affinty can be collected and the other at the upper end (5) of the band where objects having higher affinity can be collected.
2. A method as claimed in claim 1, characterised in that the inclination of the conveyor band (2) is greater than the reference surface affinity indinitation of the particular object such as shellfish, but less than the reference surface affinity indinitation of the fish species to be sepparated.
3. A method as claimed in claim 1 or 2, characterised in that the inciinition of the conveyor band is 15 - 60° from horizontal plane, in particular, 25-55°, most preferrerd 30 - 40°.
4. A method as claimed in claim 1 , 2 or 3, characterised in that one or more incline conveyor band are arranged at the upper and/or lower end of the first incline separating conveyor band for further separation of the particular objects. 6
5. A method as claimed in one or more of the claims 1 - 4, ch a racte rised in that the surface of the conveyor band being partly open.
6. A method as claimed in one or more of the claims 1 - 5, c ha racteris e d in that the surface of the conveyor band being subject to vibration and/or air blow or heating.
7. An apparatus for for separating particular objects from a mixture, the objects having different properties, in particular surface characteristics, the objects being shellfish such as shirmp mixed with other species and juveniles, where the objects are transported on a conveyor system ( 1 ), c ha racterise d in that the objects being directed onto an upwardly incline conveyor band (2), said conveying band being continuously moved in the upward incline direction (3), objects having less affinity to the surface of the band slide downward against the movement of the band, whereas objects having higher affinity to the surface of the band move upward with the band, thus the objects are directed into two groups, one at the lower end (4) of the conveyor band where objects having less affinty can be collected and the other at the upper end (5) of the band objects with higher affinity can be collected.
PCT/IS1999/000008 1998-04-22 1999-04-21 An apparatus and a method for separating particular objects from a mixture of objects Ceased WO1999053771A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU37281/99A AU3728199A (en) 1998-04-22 1999-04-21 An apparatus and a method for separating particular objects from a mixture of objects

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IS4724 1998-04-22
IS4724 1998-04-22

Publications (1)

Publication Number Publication Date
WO1999053771A1 true WO1999053771A1 (en) 1999-10-28

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ID=36793894

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IS1999/000008 Ceased WO1999053771A1 (en) 1998-04-22 1999-04-21 An apparatus and a method for separating particular objects from a mixture of objects

Country Status (2)

Country Link
AU (1) AU3728199A (en)
WO (1) WO1999053771A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262103A1 (en) * 2001-05-25 2002-12-04 Vilsund Muslinge Industri A/S A method of and an apparatus for sorting shellfish
FR2922726A1 (en) * 2007-10-24 2009-05-01 Ifremer DEVICE AND METHOD FOR SORTING SHRIMPS.
CN110882927A (en) * 2019-12-13 2020-03-17 亚洲硅业(青海)股份有限公司 Material sorting device and material sorting method
CN112243920A (en) * 2020-11-11 2021-01-22 倪略凯 Red shrimp sea is caught and is used fish shrimp separator
US11974582B2 (en) 2019-08-01 2024-05-07 Clearwater Seafoods Limited Partnership Apparatus and methods for mollusc processing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112189613B (en) * 2020-09-30 2022-04-12 广东省现代农业装备研究所 Fish and shrimp separation method and separation device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1437953A (en) * 1972-08-31 1976-06-03 Agfa Gevaert Apparatus and method for separating spherical from non-spherical objects
GB1483134A (en) * 1975-01-28 1977-08-17 Ranks Hovis Mcdougall Ltd Method and apparatus for separating seeds
DE2822854A1 (en) * 1978-05-26 1979-11-29 Werner Dipl Ing Thomsen Prawns or shrimps mechanically crushed between bolts or rolls - edible flesh is then swept sideways to separate from broken shells
GB2151948A (en) * 1983-12-29 1985-07-31 Nat Res Dev Separation equipment
GB2168625A (en) * 1984-12-21 1986-06-25 Wmc Resource Recovery Limited Material separators

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1437953A (en) * 1972-08-31 1976-06-03 Agfa Gevaert Apparatus and method for separating spherical from non-spherical objects
GB1483134A (en) * 1975-01-28 1977-08-17 Ranks Hovis Mcdougall Ltd Method and apparatus for separating seeds
DE2822854A1 (en) * 1978-05-26 1979-11-29 Werner Dipl Ing Thomsen Prawns or shrimps mechanically crushed between bolts or rolls - edible flesh is then swept sideways to separate from broken shells
GB2151948A (en) * 1983-12-29 1985-07-31 Nat Res Dev Separation equipment
GB2168625A (en) * 1984-12-21 1986-06-25 Wmc Resource Recovery Limited Material separators

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262103A1 (en) * 2001-05-25 2002-12-04 Vilsund Muslinge Industri A/S A method of and an apparatus for sorting shellfish
FR2922726A1 (en) * 2007-10-24 2009-05-01 Ifremer DEVICE AND METHOD FOR SORTING SHRIMPS.
WO2009056731A3 (en) * 2007-10-24 2009-06-25 Ifremer Device and method for sorting prawns
US11974582B2 (en) 2019-08-01 2024-05-07 Clearwater Seafoods Limited Partnership Apparatus and methods for mollusc processing
CN110882927A (en) * 2019-12-13 2020-03-17 亚洲硅业(青海)股份有限公司 Material sorting device and material sorting method
CN112243920A (en) * 2020-11-11 2021-01-22 倪略凯 Red shrimp sea is caught and is used fish shrimp separator

Also Published As

Publication number Publication date
AU3728199A (en) 1999-11-08

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