EP2656919B1 - Tamis pour dispositif de séparation de déchets - Google Patents

Tamis pour dispositif de séparation de déchets Download PDF

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Publication number
EP2656919B1
EP2656919B1 EP13165572.2A EP13165572A EP2656919B1 EP 2656919 B1 EP2656919 B1 EP 2656919B1 EP 13165572 A EP13165572 A EP 13165572A EP 2656919 B1 EP2656919 B1 EP 2656919B1
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EP
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Prior art keywords
screen
screen plate
holes
plate
thickness
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EP13165572.2A
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German (de)
English (en)
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EP2656919A1 (fr
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Anton Berger
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens

Definitions

  • the present invention relates to a sieve according to the preamble of claim 1.
  • waste is increasingly subject to stricter regulations on the treatment of different types of waste.
  • One goal is to reduce waste by as complete as possible biological decomposition of the organic fraction.
  • a prerequisite for this is an effective separation of waste mixtures into an organic fraction (biomass) and an impurity fraction.
  • impurities are regarded as impurities. If the impurities are deposited sufficiently effectively, the organic fraction can be subjected to an effective decomposition process (fermentation, composting). But also the impurity fraction can be processed better, e.g. by further separation in metal and non-metal. In the end, this also achieves a reduction in the amount that can be disposed of, for example, in a landfill as an inert fraction.
  • a suitable waste separator in the form of a hammer mill is from the patent application EP-A-1 350 569 known to the applicant. It has a shaft with movably mounted flails in a cylindrical steel housing. By means of a fast rotation of the shaft, the flails smash and shred the raw material fed to the machine and simultaneously convey it axially forward.
  • a mounted in the wall of the housing sieve with separates the sufficiently shredded substances, so that only material that is not crushed, on the output side Arrives at the end of the housing. For example, such material is too tough to be crushed. Typically, these are plastic parts or foils.
  • An object of the present invention is to provide a sieve, which reduces the impurity fraction, and a Reduction of throughput and service life to avoid.
  • a sieve is also more economical to produce.
  • a hammer mill 1 ( Fig. 1 ) has substantially a circular cylindrical housing 3, in which a central shaft 5 is mounted. Drive and storage of the shaft 5 are not shown and may be carried out according to the prior art.
  • the hammer mill 1 can total the construction of the EP-A-1350569 which is hereby included in the description.
  • the flails 9 are rotatably held in bearing blocks 7. Upon rotation of the shaft 5 (arrow 11), the flails 9 are urged by the centrifugal force in an approximately radial orientation, whereby they press the raw material pieces 13 to the lateral surface 15 with screen 16 of the housing 3 and push over them (s. figure 2 ). The forces acting on the pieces 13, centrifugal forces are symbolized by the arrows 17. The particles of a size smaller than the hole diameter 18 resulting from comminution of the raw material by the flails 9 pass through the sieve 16.
  • the housing 3 is essentially a circular cylinder and comprises in principle a circular cylindrical wall or lateral surface 15 and two end plates 19, 21.
  • a suitable location for example near the end plate 19, there is a provision such as a feed hopper (not shown) for the Feeding raw material.
  • a feed hopper not shown
  • a discharge opening for constituents of the raw material, which could not be crushed enough in the hammer mill 1, especially so the impurities. Further precautions are taken, such as an inclination of the housing 3 or an inclination of the flails 9, so that the raw material in the hammer mill 1 moves from the plate 19 to the plate 21.
  • the cylinder wall 15 consists to a large part or in total of the sieve 16, which is composed of an inner shell 25 and an outer shell 26.
  • Inner casing 25 has inner casing bores 27, which are arranged in alignment with corresponding outer casing bores 29.
  • Inner sheath 25 and outer sheath 26 also have a matching hole pitch.
  • the inner casing bores are decisive for the separating effect and are therefore designed with the screen hole diameter 18.
  • the mainly affected by the wear inner jacket 25 is made of a wear-resistant steel, which is characterized by a high strength. This steel is characterized, for example, by the following strength parameters:
  • the R m value is at least 600 and preferably at least 1000. (R m : tensile strength in Newton per square millimeter [N / mm 2 ] according to ISO standard).
  • a steel of medium strength for example with an R m value of at least 340 N / mm 2, but which is at least 400 N / mm 2 smaller than the Rm of the inner jacket 25, is sufficient.
  • inner jacket 25 and outer jacket 26 are approximately identical, for example, with a deviation of at most 50% of the respective thicker part. Preferably, however, they are nominally the same thickness.
  • Outer jacket 26 and inner jacket 25 are joined together by one of the common types of connection such as welding. This results in the required strength and dimensional stability to find use as a sieve.
  • Sieves of conventional, single-layered construction must have a thickness of approximately twice S (S: thickness of inner sheath [Si] or outer sheath [S a ]) in order to achieve the required strength and dimensional stability.
  • S thickness of inner sheath [Si] or outer sheath [S a ]
  • S thickness of inner sheath
  • S a outer sheath
  • the holes are made separately in the outer shell 26 and the inner shell 25.
  • the holes are therefore drilled in relatively thin material (thickness Si or S a ), which is possible with less expenditure of time.
  • diameters of the holes 27 in the inner jacket 25 are possible, for example, amount to only at most 80% of the total material thickness Si + S a or at most 60% thereof or in particular also approximately equal to the thickness of the inner jacket 25, wherein to improve the separation effect smaller hole diameter are preferred.
  • the bores 27, 29 are preferably produced by laser drilling. Other types such as mechanical drilling or punching are also conceivable, but require more time and are Grainteniver.
  • the material for the outer shell 26 is a steel of a quality that can be well processed and bendable.
  • a steel is used with a high wear resistance, which is therefore deformable and processable only as a thin-walled material.
  • the connection of the jackets by welding connections.
  • Welding is pointwise at the edge of the screen and in particular continuously at the end faces, which rest against the connection plates. If the sieve represents the entire cylinder jacket 15, it will also be welded according to the joint of the axially adjacent, axially extending edges.
  • the sieve has a ratio of hole area to total area of at least 30%. Another measure is that the distance between two holes is at least 60% of the diameter 18 of a hole.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)

Claims (12)

  1. Tamis (16) pour un dispositif de séparation de déchets (1), plus particulièrement un broyeur à marteaux, caractérisé en ce qu'il comprend au moins une tôle de tamis intérieure (25) d'un métal de résistance supérieure et une tôle de tamis extérieure (26) de résistance inférieure dont l'espacement des trous coïncide et qui sont jointes de manière à former un composite métallique afin de pouvoir munir le tamis de plus petits trous (27).
  2. Tamis (16) selon la revendication 1, caractérisé en ce que la tôle de tamis intérieure (25) présente des trous (27) dont le diamètre (18) est au moins 5 %, préférablement 5 à 15 % plus petit que le diamètre (30) des trous (29) y alignés dans la tôle de tamis extérieure (26) afin de réduire la résistance de passage des trous.
  3. Tamis (16) selon l'une des revendications 1 ou 2, caractérisé en ce que la tôle de tamis intérieure (25) est constituée d'un acier hautement résistant à l'usure.
  4. Tamis (16) selon l'une des revendications 1 à 3, caractérisé en ce que la tôle de tamis extérieure (29) est constituée d'un acier à moyenne résistance.
  5. Tamis (16) selon l'une des revendications 1 à 4, caractérisé en ce que le diamètre (18) des trous (27) dans la tôle de tamis intérieure (25) est au plus égal à 10 mm, préférablement au plus égal à 6 mm.
  6. Tamis (16) selon l'une des revendications 1 à 5, caractérisé en ce que la superficie totale de section transversale des trous (27) dans la tôle de tamis intérieure (25) est égale à au moins 30 %, préférablement à au moins 35 % de la superficie totale de la tôle de tamis intérieure (25).
  7. Tamis (16) selon l'une des revendications 1 à 5, caractérisé en ce que la superficie totale des trous (27) dans la tôle de tamis intérieure (25) est égale à 25 % à 50 % de la superficie totale de la tôle de tamis intérieure (25).
  8. Tamis (16) selon l'une des revendications 1 à 7, caractérisé en ce que la distance entre les trous (27) de la tôle de tamis intérieure (25) est au plus égale à l'épaisseur (S) du composite métallique.
  9. Tamis (16) selon l'une des revendications 1 à 8, caractérisé en ce que les tôles de tamis intérieure et extérieure (25, 26) sont reliées entre elles par une liaison non détachable, préférablement par au moins une liaison parmi le soudage, le vissage, le rivetage et le collage.
  10. Tamis (16) selon la revendication 9, caractérisé en ce que la liaison est réalisée sur la surface entière, sous la forme de liaisons par points régulièrement distribuées et/ou d'une liaison au bord, cette dernière liaison étant continue par segments et/ou ponctuelle.
  11. Tamis (16) selon l'une des revendications 1 à 10, caractérisé en ce que le tamis est courbé, la tôle de tamis extérieure (26) étant agencée radialement à l'extérieur de la tôle de tamis intérieure (25) et le rayon de courbure moyen étant préférablement au plus égal à 35 % de la plus grande distance entre deux bords du tamis.
  12. Tamis (16) selon l'une des revendications 1 à 11, caractérisé en ce que le diamètre des trous dans la tôle de tamis intérieure (25) est inférieur à l'épaisseur S du composite métallique, préférablement au plus égal à 80 % et plus préférablement au plus égal à 60 % de l'épaisseur du composite métallique, et particulièrement préférablement substantiellement égal à l'épaisseur (Si) de la tôle de tamis intérieure (25).
EP13165572.2A 2012-04-27 2013-04-26 Tamis pour dispositif de séparation de déchets Active EP2656919B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH5872012A CH706451A2 (de) 2012-04-27 2012-04-27 Siebkorb aus Verbundmetall.

Publications (2)

Publication Number Publication Date
EP2656919A1 EP2656919A1 (fr) 2013-10-30
EP2656919B1 true EP2656919B1 (fr) 2015-07-01

Family

ID=48444049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13165572.2A Active EP2656919B1 (fr) 2012-04-27 2013-04-26 Tamis pour dispositif de séparation de déchets

Country Status (2)

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EP (1) EP2656919B1 (fr)
CH (1) CH706451A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022171277A1 (fr) 2021-02-10 2022-08-18 Ardey Goetz Séparateur, en particulier pour la séparation de déchets organiques et d'additifs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847193A (en) * 1930-10-18 1932-03-01 Louis D Peters Adjustable mill screen
US3617007A (en) * 1969-10-03 1971-11-02 Joseph F Bonarrigo Jr Grate bar assembly for a rock crusher
JP3947913B2 (ja) * 2002-02-19 2007-07-25 株式会社サタケ 穀物の衝撃式粉砕装置
EP1350569B1 (fr) 2002-04-03 2014-06-25 Anton Berger Séparateur de déchets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022171277A1 (fr) 2021-02-10 2022-08-18 Ardey Goetz Séparateur, en particulier pour la séparation de déchets organiques et d'additifs

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Publication number Publication date
CH706451A2 (de) 2013-10-31
EP2656919A1 (fr) 2013-10-30

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