EP2926915A1 - Écran à rouleaux de disque - Google Patents

Écran à rouleaux de disque Download PDF

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Publication number
EP2926915A1
EP2926915A1 EP14185519.7A EP14185519A EP2926915A1 EP 2926915 A1 EP2926915 A1 EP 2926915A1 EP 14185519 A EP14185519 A EP 14185519A EP 2926915 A1 EP2926915 A1 EP 2926915A1
Authority
EP
European Patent Office
Prior art keywords
rollers
screen
disk
disks
tubes
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.)
Granted
Application number
EP14185519.7A
Other languages
German (de)
English (en)
Other versions
EP2926915B1 (fr
Inventor
Paolo Rebai
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.)
Promeco Energy & Plants Srl
Original Assignee
Promeco Energy & Plants 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
Application filed by Promeco Energy & Plants Srl filed Critical Promeco Energy & Plants Srl
Publication of EP2926915A1 publication Critical patent/EP2926915A1/fr
Application granted granted Critical
Publication of EP2926915B1 publication Critical patent/EP2926915B1/fr
Active legal-status Critical Current
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
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers

Definitions

  • the present invention relates to a screen with disk rollers, which is particularly, although not exclusively, useful and practical for use in the process of separation and screening of urban solid waste, which is commonly carried out as part of the treatment of waste in order to separate elements of different size before the disposal or recycling thereof.
  • the screen is an apparatus whose purpose is to separate elements of different sizes which make up an aggregate of unconnected materials in pieces, such as for example urban solid waste, or in powder form.
  • the term is used especially to indicate the mechanical devices used to separate aggregates into various size classes, and such mechanical devices are employed in various different fields of industry, such as the waste treatment industry, the chemical industry, the extraction industry, and also in the construction of buildings or roads.
  • a screen with a net is constituted substantially by a net, the meshes of which can have a constant or increasing diameter.
  • the aggregates to be screened are moved and made to advance on the surface of the net of the screen and, thanks to this movement, the elements that are smaller than the meshes, i.e. than the holes, which are contained in the net of the screen pass through the net and fall into the collection region below.
  • the smaller elements of the aggregates to be screened pass through the net of the screen, thus falling into the collection region, at the level of the initial area of the net with narrower meshes, while the larger elements of the aggregates to be screened fall into the collection region at the level of the final area of the net, with wider meshes.
  • Such type of conventional screens suffers some drawbacks, however, in that such screens with nets must be supplied with a large amount of energy in order to be actuated, and they are thus very wasteful from the point of view of energy consumption, and furthermore they necessitate a complex system for the advancement of the aggregates to be screened.
  • a screen with disk rollers is constituted substantially by a series of mutually parallel rotating rollers, each one of which is in turn constituted by a central shaft on which disks are fixed in a perpendicular position with respect to the shaft. All the rollers of such a screen rotate in a same direction of rotation, and the spacing, i.e. the distance, between the rollers of such a screen and between the disks of a same roller can be constant or increasing.
  • the aggregates to be screened are loaded onto the first rollers with reduced spacing, which transport the remaining elements of the aggregates to be screened toward the subsequent rollers with wider spacing.
  • Such screens with disk rollers also exhibit some drawbacks, in that elongated elements of the aggregates to be screened, such as for example a filament or a sheet of plastic, in particular if wet, can clog the rollers, winding around them and creating tangles that obstruct the spaces between the rollers and between the disks, through which the elements of the aggregates to be screened should fall into the collection region below.
  • elongated elements of the aggregates to be screened such as for example a filament or a sheet of plastic, in particular if wet, can clog the rollers, winding around them and creating tangles that obstruct the spaces between the rollers and between the disks, through which the elements of the aggregates to be screened should fall into the collection region below.
  • Screens with disk rollers are known, which were developed for the purpose of solving the above mentioned problems found in screens with disk rollers, which also comprise anti-clogging elements, which are constituted by cylindrical tubes arranged around the shafts between the adjacent disks of a same roller, and which are also known as idle tubes since they rotate freely about these shafts.
  • This slow and partial rotation of the idle tubes can enable the elongated elements of the aggregates to be screened, such as for example a filament or a sheet of plastic, in particular if wet, to rest on an idle tube and to turn on and with it, as a consequence winding around the idle tube and creating a tangle that comes to obstruct the spaces between the rollers and between the disks, through which the elements of the aggregates to be screened should fall into the collection region below.
  • a filament or a sheet of plastic in particular if wet
  • the aim of the present invention is to overcome the above mentioned drawbacks of the known art by devising a screen with disk rollers, which is particularly, although non exclusively, useful and practical for use in the process of separation and screening of urban solid waste, which makes it possible to impede the rotation of the idle anti-clogging tubes if the filament-shaped elements that form part of the aggregates to be screened are trapped in the slot comprised between the disks of the rollers and the idle tubes.
  • an object of the present invention is to conceive a screen with disk rollers which makes it possible to prevent the rollers from being clogged by elongated elements of the aggregates to be screened, which can wind around the idle tubes, or more generally around the rollers, thus obstructing the spaces between the rollers and between the disks, through which the elements of the aggregates to be screened should fall into the collection region below.
  • Another object of the present invention is to devise a screen with disk rollers which makes it possible to avoid shutting down the screen in order to carry out maintenance operations adapted to the removal of the material trapped between the rollers and between the disks.
  • Another object of the present invention is to conceive a screen with disk rollers which makes it possible to use a simple, effective and efficient system for advancing the aggregates to be screened.
  • Another object of the present invention is to devise a screen with disk rollers which makes it possible to minimize the energy consumption necessary in order to be actuated.
  • Another object of the present invention is to provide a screen with disk rollers which is highly reliable, easily and practically implemented and low cost.
  • a screen with disk rollers comprising a plurality of mutually parallel rollers that are installed on a supporting structure and actuated by way of at least one motor and means for transmission in a same direction of rotation, said rollers being each constituted by a shaft on which a plurality of disks is fixed, characterized in that said rollers comprise idle tubes arranged between pairs of said adjacent disks, said idle tubes being provided with rods adapted to mechanically prevent the complete rotation of said idle tubes.
  • the screen with disk rollers according to the invention which is generally designated by the reference numeral 10, comprises substantially a plurality of mutually parallel rotating rollers 30, each one of which is in turn constituted by a central shaft 35 on which disks 40 are fixed, such rollers 30 being installed on a frame 20.
  • the frame 20, or more generally the supporting structure of the screen with disk rollers 10, is preferably made of metal and fulfils a plurality of functions. Firstly, it supports and aligns the rollers 30 of the screen 10 proper, by acting as accommodation for their corresponding shafts 35; secondly, it keeps the aggregates to be screened inside the screen 10, thus preventing the egress of elements of the aggregates to be screened into the surrounding work environment; lastly, it covers and protects the means of transmission of the movement to the rollers 30 from the aggregates to be screened placed inside the screen 10 and from other external sources of disturbance that could compromise the correct operation of the screen 10 proper.
  • the frame 20 can also be configured to incline the plane of the rollers 30, by way of adapted mechanisms, preferably hydraulic, in order to optimize the process of screening the aggregates.
  • the rollers 30 are installed on a same level inside the frame 20 by way of adapted receptacles 22, which are provided on the inner surfaces of the frame 20 and are adapted to accommodate the ends of the shafts 35 of the rollers 30.
  • rollers 30, and thus the shafts 35 can also be positioned in the frame 20 on several different levels, in order to obtain an "up-and-down" effect that is adapted to overturn the flat elements of the aggregates to be screened, which otherwise would risk remaining on the rollers 30 of the screen with disk rollers 10.
  • the position of such receptacles 22 in the frame 20 is conveniently designed in such a way that the rollers are installed and kept in a mutually parallel position.
  • the position of the receptacles 22 in the frame 20 also defines the spacing, i.e. the distance, between the rollers 30 of the screen 10, and such spacing can be constant or increasing.
  • the distance between one roller 30 and the next is always the same, for example always equal to 10 centimeters. But with increasing spacing, the distance between one roller 30 and the next progressively increases, for example 10 centimeters between the first roller 30 and the second roller 30, 12 centimeters between the second roller 30 and the third roller 30, 14 centimeters between the third roller 30 and the fourth roller 30, and so on.
  • the rollers 30 are actuated by a motor 25, whose rotary motion is transmitted to the shafts 35 of the rollers 30 by way of transmission means that are comprised in the frame 20.
  • the screen with disk rollers 10 can also comprise more than one single motor 25; for example it is possible to install two or three motors 25 associated with inverters that regulate their speed, in order to actuate different groups of rollers 30 according to different rotation speeds, again by transmitting such rotary motion to the shafts 35 of the rollers 30.
  • the rollers 30 rotate in a same direction of rotation and their rotation speed can be the same for all the rollers 30 of the screen 10 or it can be differentiated on the basis of the position of the rollers 30, optionally being adjustable by an operator.
  • disks 40 Fixed on each shaft 35, which constitutes the element that supports a roller 30, disks 40 are provided, which preferably are hexagonal and preferably are made of carbon steel. Furthermore, on the rim of each disk 40 there is a band 42 that protrudes perpendicular to the surface of the disk 40 proper.
  • the screen with disk rollers 10 can be used not only for separating the elements of the aggregates to be screened, but also for spreading out an aggregate of unconnected materials over a larger surface, since the rollers 30 are capable of jolting such unconnected materials until they are arranged over a greater surface. This characteristic is very useful, particularly in view of the subsequent treatments of urban solid waste, which involve the use of feeders, optical readers, metal separators, etc.
  • the disks 40 are fixed on the corresponding shaft 35 in position that is perpendicular with respect to the shaft 35, and, being fixed, they follow the rotary motion of the shaft 35 on which they are fixed, once this is actuated.
  • the spacing, i.e. the distance, between the disks 40 of a same roller 30 of the screen 10 can be constant or increasing. With constant spacing, the distance between one disk 40 and the adjacent disk 40 is always the same for all the rollers 30, for example always equal to 5 centimeters. But with increasing spacing, the distance between one disk 40 and the adjacent disk 40 progressively increases, for example 5 centimeters between one disk 40 and the next in the first roller 30, 7 centimeters between one disk 40 and the next in the second roller 30, 9 centimeters between one disk 40 and the next in the third roller 30, and so on.
  • anti-clogging tubes 45 are provided, also known as idle tubes, which are arranged around the shafts 35 and are not fixed to them, and thus are not fixed to the rollers 30, but instead surround the part of the shafts 35 that is comprised between two adjacent disks 40 and rotate freely about those shafts 35.
  • the idle tubes 45 are in practice constituted by cylindrical tubes that have a larger diameter with respect to the diameter of the shaft 35 and a length that is equal to the distance between the two adjacent disks 40 on the same roller 30.
  • the idle tubes 45 are made preferably of hard plastics or of metal and have a mechanical impediment to their rotation which is constituted by anti-rotation rods 50 that are installed, one per each idle tube 45, in the lower part.
  • the rods 50 allow the idle tubes 45 to oscillate to the right or to the left, but not to rotate completely about themselves, thus producing a mechanical impediment to the 360° rotation of the idle tubes 45.
  • the direction of oscillation of the idle tubes 45, and thus also of the rods 50, is perpendicular to the rollers 30 of the screen 10.
  • the rods 50 are preferably made of carbon steel and are conveniently sized in order to impact, during rotation, against the disks 40 of the previous roller 30 or of the subsequent roller 30, so that such impact mechanically blocks the rotary motion of the idle tubes 45, which otherwise would be able to rotate because they are locked to the disks 40 by filament-shaped elements trapped in the slot comprised between the disks 40 of the rollers 30 and the idle tubes 45, or because they are moved by the rollers 30 which partially transmit their rotary motion to the idle tubes 45.
  • the screen with disk rollers thus conceived makes it possible to overcome the qualitative limitations of the known art, in that it makes it possible to increase the operating effectiveness of the screen, by preventing the formation of blockages and tangles of material, with the consequent clogging of the rollers, and by preventing the shutdown of the screen for the removal of material trapped between the rollers and between the disks.
  • the elements of the aggregates to be screened thus manage to advance along the entire length of the screen 10 and the only jammed elements would be the filament-shaped elements of sufficiently fine thickness as to become trapped in the slot comprised between the disks of the rollers and the idle tubes.
  • the screen with disk rollers according to the invention has been conceived of in particular for use in the process of separation and screening of urban solid waste, which is commonly carried out in the treatment of waste before the disposal or recycling thereof, it can also be used, more generally, for screening aggregates in which the elements, owing to their shape or their composition, tend to become trapped in the rollers, obstructing the spaces between the rollers themselves and between their disks.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP14185519.7A 2014-03-27 2014-09-19 Crible à rouleaux à disques Active EP2926915B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20140518 2014-03-27

Publications (2)

Publication Number Publication Date
EP2926915A1 true EP2926915A1 (fr) 2015-10-07
EP2926915B1 EP2926915B1 (fr) 2017-08-30

Family

ID=50819836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14185519.7A Active EP2926915B1 (fr) 2014-03-27 2014-09-19 Crible à rouleaux à disques

Country Status (1)

Country Link
EP (1) EP2926915B1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017081365A1 (fr) * 2015-11-10 2017-05-18 Bmh Technology Oy Tamis à disque et moyens de prévention d'enchevêtrement de matière à installer dans un tamis à disque
ITUA20164184A1 (it) * 2016-06-08 2017-12-08 Promeco Spa Vaglio separatore a rulli di dischi.
EP3311930A1 (fr) * 2016-10-18 2018-04-25 Rentec NV Dispositif de criblage comprenant un ensemble d'éléments anti-obstruction
CN109078826A (zh) * 2018-09-14 2018-12-25 中山斯瑞德环保科技股份有限公司 一种防缠绕的盘筛
IT201800004449A1 (it) * 2018-04-12 2019-10-12 Vaglio separatore a dischi o a stelle per rifiuti, asse impiegabile in tale vaglio e manicotto impiegabile in tale asse
IT201800004450A1 (it) * 2018-04-12 2019-10-12 Vaglio separatore a dischi o a stelle per rifiuti, asse impiegabile in tale vaglio e manicotto impiegabile in tale asse
WO2019197969A3 (fr) * 2018-04-12 2020-03-12 GEO S.A.S. di Tazzoli Antonio & C. Tamis séparateur à disques ou étoiles pour déchets, axe utilisable dans ledit tamis ainsi que procédé de modification d'un tamis séparateur à disques ou étoiles pour déchets
CN114011696A (zh) * 2021-10-09 2022-02-08 晋能控股装备制造集团金鼎山西煤机有限责任公司 带有块煤筛分功能的选煤厂块煤装车系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106264A2 (fr) * 1999-12-01 2001-06-13 ECOSTAR S.r.l. Tamis pour le tri de déchets
DE102007027846B3 (de) * 2007-06-13 2008-05-15 Neuenhauser Maschinenbau Gmbh Sternsiebmaschine
WO2011045656A1 (fr) * 2009-10-14 2011-04-21 Ecostar S.R.L. Crible pour la séparation de matières solides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106264A2 (fr) * 1999-12-01 2001-06-13 ECOSTAR S.r.l. Tamis pour le tri de déchets
DE102007027846B3 (de) * 2007-06-13 2008-05-15 Neuenhauser Maschinenbau Gmbh Sternsiebmaschine
WO2011045656A1 (fr) * 2009-10-14 2011-04-21 Ecostar S.R.L. Crible pour la séparation de matières solides

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017081365A1 (fr) * 2015-11-10 2017-05-18 Bmh Technology Oy Tamis à disque et moyens de prévention d'enchevêtrement de matière à installer dans un tamis à disque
ITUA20164184A1 (it) * 2016-06-08 2017-12-08 Promeco Spa Vaglio separatore a rulli di dischi.
EP3311930A1 (fr) * 2016-10-18 2018-04-25 Rentec NV Dispositif de criblage comprenant un ensemble d'éléments anti-obstruction
IT201800004449A1 (it) * 2018-04-12 2019-10-12 Vaglio separatore a dischi o a stelle per rifiuti, asse impiegabile in tale vaglio e manicotto impiegabile in tale asse
IT201800004450A1 (it) * 2018-04-12 2019-10-12 Vaglio separatore a dischi o a stelle per rifiuti, asse impiegabile in tale vaglio e manicotto impiegabile in tale asse
WO2019197969A3 (fr) * 2018-04-12 2020-03-12 GEO S.A.S. di Tazzoli Antonio & C. Tamis séparateur à disques ou étoiles pour déchets, axe utilisable dans ledit tamis ainsi que procédé de modification d'un tamis séparateur à disques ou étoiles pour déchets
US11305314B2 (en) 2018-04-12 2022-04-19 GEO S.A.S. di Tazzoli Antonio & C. Separator screen in discs or stars for waste, axle usable in such screen as well as method for modifying a separator screen in discs or stars for waste
CN109078826A (zh) * 2018-09-14 2018-12-25 中山斯瑞德环保科技股份有限公司 一种防缠绕的盘筛
CN114011696A (zh) * 2021-10-09 2022-02-08 晋能控股装备制造集团金鼎山西煤机有限责任公司 带有块煤筛分功能的选煤厂块煤装车系统

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