EP4059623B1 - Appareil de criblage de combinaison - Google Patents

Appareil de criblage de combinaison Download PDF

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Publication number
EP4059623B1
EP4059623B1 EP21162485.3A EP21162485A EP4059623B1 EP 4059623 B1 EP4059623 B1 EP 4059623B1 EP 21162485 A EP21162485 A EP 21162485A EP 4059623 B1 EP4059623 B1 EP 4059623B1
Authority
EP
European Patent Office
Prior art keywords
screen
disc
graded
rotary drum
streams
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.)
Active
Application number
EP21162485.3A
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German (de)
English (en)
Other versions
EP4059623A1 (fr
Inventor
Malachy James Rafferty
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.)
Porta Fill International Ltd
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Porta Fill International Ltd
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Publication date
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Priority to EP21162485.3A priority Critical patent/EP4059623B1/fr
Publication of EP4059623A1 publication Critical patent/EP4059623A1/fr
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Publication of EP4059623B1 publication Critical patent/EP4059623B1/fr
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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
    • B07B1/155—Roller screens using corrugated, grooved or ribbed rollers the rollers having a star shaped cross section
    • 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
    • B07B1/005—Transportable screening plants
    • 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
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • 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
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • the present invention relates to combined screening apparatus for separating, unconsolidated feed materials that contain a mixture of particle sizes into two or three streams of different particle sizes. This process is known as screening.
  • screening machines start with a feed hopper or the like, a mechanical screen, and one or more conveyors to transfer the processed materials to a nearby location or to a secondary processing plant. Screening machines can be either mobile or static.
  • a trommel or drum screen.
  • This screen is a rotating mechanical screener used to separate a variety of materials into different particle sizes. It has a perforated cylindrical drum. Separation is achieved by rotating the drum to agitate and move the material along the drum's screening surface.
  • Machines containing drum screens commonly referred to as 'trommels', are known in the art in the pre-treatment of mixed commercial and municipal wastes; as well as for screening materials such as soil, biomass, ores, rock, sand, and aggregates.
  • a second type of mechanical screen is a disc screen, also known as a star screen.
  • This is a mechanical screen used to separate materials into different particle sizes. It consists of a series of shafts on which rotating star or disc type wheels are mounted. The spacing between the shafts and the wheels determines the respective openings. The material smaller than the openings falls through the openings, while material greater than the apertures continues to move along the screening surface until it exits the screen.
  • Feed materials for screening that contain high volumes of damp, bulky and/or non-uniform constituents such as biomass, plastic, textiles, newspaper, and cardboard, can be problematic and difficult to screen. These materials can cover, clog, or become lodged in the openings of a drum screen, reducing the screen's ability to operate efficiently, a problem commonly referred to as “blinding” and “plugging” within the industry.
  • Disc screens are usually employed to ⁇ scalp', i.e., remove oversize material in applications where there is a high percentage of bulk materials.
  • US5361909 shows, in accordance with the preamble of claim 1, an apparatus for separating and recovering waste aggregate into graded streams using a disc screening means and a cylindrical rotatable trommel.
  • the use of multiple apparatus in series is known.
  • US7882958B2 discloses a disc screen located on top of a feed hopper directly before a drum screen, so that oversize material flows in the opposite direction away from the drum screen.
  • the present invention details an integrated trommel and disc screen unit; described as a 'combination screen' comprising of at least one revolving screening drum, a series of driven shafts and discs mounted on an inner supporting frame, one feeder and at least one collection device.
  • the invention is configured such that the disc screen assembly is position inside the drum screen, with the disc screen assembly anchored in place at either end relative to the feeder while the drum screen remains free to rotate.
  • a combination screening apparatus for screening a mixed material into three graded streams according to claim 1.
  • the present invention provides a combination screening apparatus for screening a mixed material into three graded streams, comprising a disc screen wholly, substantially or partly located within a rotary drum screen.
  • the present invention provides a multi-deck screening apparatus for screening a mixed material into three graded streams, the apparatus comprising two or more overlapping screening decks.
  • the present invention provides a mobile multi-deck screening apparatus for screening a mixed material into three graded streams, the apparatus comprising two or more overlapping screening decks and at least three discharge conveyors.
  • two of the graded streams are combined prior to conveyance away from the apparatus.
  • the apparatus is for screening a mixed material into more than three graded streams, by additional processing or screening or separation, prior to conveyance away from the apparatus.
  • the present invention can be provided as an integrated rotary or trommel screen or unit, and a disc screen unit or assembly.
  • the invention is characterised by the disc screen assembly positioned at least partly within or inside the rotary drum screen.
  • the apparatus is provided on a chassis or frame.
  • the apparatus is a mobile screening apparatus.
  • the apparatus has a tracked chassis, comprising two caterpillar tracks able to relocate the apparatus around a site for multiple use.
  • the apparatus may be mobile using wheels, tracks, and other such means, or combinations of same.
  • the apparatus is a static or fixed plant.
  • the apparatus has a main frame or chassis, and one or more sub-frames.
  • the invention generally has a feed or input end, and a discharge or outlet end or ends, in that different graded streams may be provided from the apparatus from different locations.
  • the feed end is for input of mixed material to be processed, starting with the disc screen.
  • the direction in which the mixed material moves from the feed to the discharge is referred to as material flow or the direction of material flow.
  • the apparatus further comprises a feed hopper for the mixed material, further optionally an integral feeder hopper, next to or otherwise near the feed end.
  • the feed mixed material may comprise any mixture, including materials from quarries, building sites, waste processing facilities and composting facilities, including but not limited to feed materials that contain high volumes of damp, bulky and/or non-uniform constituents such as biomass, plastic, textiles, newspaper, and cardboard.
  • This includes waste materials such as, construction and industrial waste (C&I), constructions and demolition waste (C&D), biomass, and Municipal solid waste (MSW).
  • discharge' is used herein to describe the material exiting the apparatus as a graded stream, typically for subsequent collection and stockpiling for further use or processing.
  • 'disc screen' is used herein to include screens comprising a series of spaced rotating drums or rollers or shafts, arranged in a generally linear direction, with defined openings thereinbetween to provide the screening.
  • the disc screen may be arranged to angle or incline (relative to a ground surface), or to have one or more differently angled or inclined portions.
  • One disc screen comprises a series of shafts, optionally with a rough or roughened surface, with defined openings or spacings thereinbetween.
  • Separation is achieved by rotating the shafts simultaneously in the same direction to agitate and move material across the top of the shafts, discs or wheels, and so along the screen's surface. Those items, parts or particles of the material that are smaller than the openings fall through the openings, while those parts, etc. greater than the apertures continue to move along the screening surface until it exits the screen.
  • Disc screens are particularly suited for screening damp and bulk materials, and are particularly useful for screening biomass as they provide good agitation, which is necessary for separating the particles that tend to knit together.
  • the disc screen comprises a series of discs mounted on driven shafts.
  • the disc s a shape selected from the group comprising: a polygon, circular, egg, ovoid or a star shape.
  • the disc screen comprises two or more disc screens in series, extending at least partially along the length of the rotary drum screen.
  • the present invention also allows for alternative openings in the disc screen; as well as allowing for the number, size, and distance of the shafts or the discs relative to one another on the shafts to be varied.
  • the desired openings will depend on the use of the apparatus and the nature of the mixed material to be screened.
  • the disc screen is mounted on a disc frame.
  • the rotary drum screen comprises a cylindrical drum, rotated on or by a frame, optionally at least partly in an outer housing.
  • the disc frame is secured to each end of the frame or housing, and extends through the drum.
  • the disc frame includes a disc drive mechanism to drive the shafts and discs.
  • the mechanism is typically a series of drive chains and cogs, able to transfer power from a motor or the like on the apparatus to the relevant shafts to drive all the discs.
  • Such mechanisms are known in the art, and can be protected by the disc frame in use.
  • disc screen wholly, substantially or partly located within the rotary drum screen, such that the screen vertically overlap.
  • the screens overlap by at least 1 metre.
  • the screens substantially overlap, with less than 2 metre or 1 metre of non-overlap of the disc screen within the rotary drum screen.
  • the disc screen may extend beyond one or both ends of the rotary drum screen, or start within one or both ends of the rotary drum screen, or a combination of same.
  • the disc screen has a feed end located within one end of the rotary drum screen.
  • the disc screen has a feed end located approximately 1 metre or more than 1 metre beyond one end of the rotary drum screen.
  • the disc screen has a discharge end beyond the discharge end of the rotary drum screen.
  • the disc screen has a discharge end located approximately 1 metre or more than 1 metre beyond the discharge end of the rotary drum screen.
  • the disc frame provides side walls to the disc screen, to retain material on the disc screen that is not sized to pass through its apertures until reaching the discharge end of the disc screen.
  • the present invention allows for alterations to the disc and shaft configuration and for the replacement of discs that have become worn or damaged.
  • the present invention also provides alternative disc screen configurations, ordinations, and angles; relative to the drum screen.
  • the disc screen can also be configured with one or more disc screen embodiments which can be arranged below or in line with each other.
  • the disc screen may have any suitable configuration relative to the rotary drum screen. Where the rotary drum screen has a longitudinal centre line along its drum length, the disc screen may wholly or substantially be positioned in line with such longitudinal centre line, optionally above or below the longitudinal centre line, and optionally being wholly, substantially or partly inclined relative to the longitudinal centre line.
  • the discs screen may be planar or substantially planar along the longitudinal centre line of the rotary drum screen.
  • the disc screen has a feed end and a discharge end, wherein the discharge end is relatively higher from a ground surface than the inlet end.
  • the discharge end is relatively higher from a ground surface than the inlet end at or near the end of the disc screen in the form of an end' uplift' of the disc screen relative to the longitudinal centre line of the rotary drum screen.
  • the material that passes through the openings in the disc screen falls by gravity into the rotary drum screen surrounding the disc screen.
  • Rotary drum screens are known in the art, and generally comprise a rotating mechanical screen able to separate a variety of materials into different particle sizes.
  • the screen has a perforated cylindrical drum with various aperture sizes, rotated on or by a frame, and with a feed or input end, and a discharge or output end. Separation is achieved by rotating the drum to agitate and move the material along the drum's screening surface.
  • Those items or parts or particles of the mixed material smaller than the apertures of the rotary drum screen pass through the screen to provide a second graded stream, which can be termed an 'undersized stream'.
  • Those particles, etc. of the mixed material bigger than the apertures in the rotary stream (but smaller than the apertures in the disc screen), which can be termed a 'midsized stream' continue to move along the drum's screening surface until they exit the screen at the discharge end as a third graded stream.
  • the apertures in the rotary drum screen can vary in sizes and shape.
  • Machines containing drum screens commonly referred to as ⁇ trommels', are known in the art in the pre-treatment of mixed commercial and municipal wastes; as well as for screening materials such as soil, biomass, ores, rock, sand, and aggregates.
  • the rotary drum screen has apertures that vary in size and shape, and/or the drum screen itself can vary in size or shape.
  • the rotary drum screen can be circler or polygon in shape.
  • the apparatus comprises one or more discharge conveyors to discharge and convey one or more of the three graded streams away from the apparatus.
  • the conveyors may be those known in the art, generally having a feed end proximal to the discharge of a graded stream from the apparatus, and a distal end away from the apparatus.
  • the conveyors are directed away differently from the apparatus, to allow each collection and/or stockpiling to be distinct or separate.
  • the apparatus comprises two conveyors to discharge two graded streams away from the apparatus.
  • the apparatus comprises three conveyors to discharge the three graded streams separately away from the apparatus.
  • the apparatus comprises three conveyors and is switchable between discharging two or three graded streams separately away from the apparatus.
  • this is known as a "two-way-split", and a "three-way-split".
  • one discharge conveyor is a switchable conveyor selectively switchable between an active state such that each discharge conveyor discharges one graded stream, to an inactive state such that one discharge conveyor discharges two graded streams.
  • the apparatus comprises at least three discharge conveyors; a conveyor for collecting and discharging the oversized stream or fraction, referred to as an oversize conveyor; a conveyor for collecting and discharging the midsized stream or fraction, referred to as an midsize conveyor; an internal conveyor for collecting the undersized stream or fraction, referred to as a collection conveyor; a conveyor for discharging the undersized fractions, referred to as an undersize conveyor.
  • the oversize conveyor can be moved to divert the flow of oversized material to the midsize conveyor, allowing the midsize conveyor to function as a two in one discharge conveyor, as in the midsize conveyor can be repurposed and used to collect and transfer the oversized and midsized material together as one fraction, thus making the oversize conveyor unrequired.
  • the invention can produce oversized and undersized fractions only.
  • the oversize conveyor can moved back into position to collect and discharge the oversized material, allowing the screening machine to revert to providing oversized, midsized, and undersized fractions.
  • the apparatus includes one or more discharge collection stations for the graded streams.
  • a discharge collection station may be a chute, tray, hopper or conveyor, and may provide for the recombination of two or more of the graded streams.
  • the present invention is able to separate the feed mixed material into three grades according to their size, hereinafter referred to as an 'oversized stream', a 'midsized stream', and an 'undersized stream'.
  • the oversized stream is typically bulk material, such as those materials described above.
  • the present invention also provides a method of grading a mixed material into three graded streams, comprising at least the steps of:
  • a feed mixed material enters the disc screen via a hopper, conveyor, or the like.
  • the undersized and midsized particles fall through the disc screen openings and onto the rotary drum screen's inner screening surface below the disc screen.
  • the oversized particles continue to flow along the disc screen until they exit the screen at the discharge end as a first graded stream.
  • the undersized particles pass through the drum screen and rotary drum screen, and optionally onto a collection conveyor, and onto a collation bay for stockpiling.
  • the oversized and midsized material can be conveyed and stockpiled separately, known as a "three-way-split", or conveyed and stockpiled together, known as a "two-way-split".
  • either the disc screen or the rotary drum screen, or both the disc screen and the rotary drum screen of the apparatus are removable from the apparatus.
  • both the disc screen and the rotary drum screen can be maintained as a combination screen, to be fitted into another processing plant as one single unit or as separate segments.
  • either the disc screen or the rotary drum screen can be reconfigured with alternative rotary drum screen or disc screen arrangements.
  • the apparatus comprises an openable rotary drum screen housing, such that opening of the housing allows the removal of either the disc screen or the rotary drum screen, or both the disc screen and the rotary drum screen.
  • the rotary drum screen and/or the disc screen embodiments can be disconnected from one another and used as standard stand-alone screens.
  • FIG. 1 shows an example of a mobile screening apparatus in connection with the present invention.
  • FIG. 2 is a section through the apparatus of FIG 1.
  • FIGs 1 and 2 show a disc screen 1 comprising a series of driven shafts and disc mounted on a supporting frame inside a rotary drum screen 2.
  • the apparatus includes a hopper 3 and feed conveyor 4 inline and adjacent to a feed end of the disc screen 1.
  • the apparatus is on a mobile chassis 62 having two caterpillar tracks 64 so as to be mobile around a site or other location.
  • the apparatus also includes an internal collection conveyor 5 positioned directly underneath the drum screen 2 for collecting and transport of that material that passes through the disc screen 1 and the drum screen 2 to a first discharge conveyor 6.
  • the apparatus also includes a second discharge conveyor 7 in line with the longitudinal direction of the apparatus, and able to collect and convey that material that passes through the disc screen 1 and exits the discharge end of the screening drum 2.
  • the apparatus also includes a third discharge conveyor 8 positioned above the second discharge conveyor 7 and having a collection tray 8a, able to collect and convey the discharged material that does not pass through the disc screen 1.
  • the discharge conveyors 5/6/7/8 can be reconfigured, repositioned, or used to transport material to a stockpile, or to secondary processing unit or plant, or for transportation to another location.
  • FIG. 3 shows detail of a cylindrical drum screen 25 that can be used as part of the rotary drum screen 2.
  • the cylindrical drum screen 25 has a feed end 9, a discharge end 10, and various apertures (holes) 11. Feed mixed material enters the drum screen 25 at the feed end 9. As the drum screen 25 rotates, the material flows along the drum's inner screening surface 14 in a spiralling 12 motion. This agitates the material, allowing particles 13 smaller than the apertures 11 to pass through the screen 25, while particles larger than the apertures 11 exit the screen 25 at the discharge end 10.
  • the apertures 11 may vary in size and shape,
  • FIG. 4 shows detail of parts of the disc screen 1.
  • the disc screen 1 has an infeed end 15, a discharge end 18, and series of disc rollers 22 arranged in a staggered configuration as illustrated in FIG.s 4a and 4b .
  • Each disc roller 22 consists of at least one or more discs 23 mounted on a drive shaft 24.
  • the spacing 31 between the disc rollers 22 determines the respective openings.
  • the rows of disc rollers 22 rotate simultaneously in a conveying direction 25, agitating the material as it flows along the screen's top surface 16. Undersized particles 19 fall through the openings 31, while 'oversized particles' 17 continue to move along the screening surface 16 until they exit the screen 1 at the discharge end 18.
  • the discs 23 can be polygon, circular or star shaped.
  • FIG. 5a shows an illustration of a star shaped disc 23.
  • Each disc roller 22 can have its own one motor drive, or be driven by a single motor drive.
  • the motor drive(s) can be electric, pneumatic, or hydraulic.
  • the disc roller 22 drives can be independent of each other or coupled together.
  • FIG. 4a provides an illustration of the disc rollers 22 coupled together via chains 20 and sprockets 21 to provide an integrated single drive (not shown).
  • FIG.s 5 and 6 show detail of a disc screen embodiment 30 and the drum screen 25 shown in FIG. 3 .
  • FIG.6 show the drum screen 25 and the disc screen 30 able to be combined to form a combination screen 38, (and able to be separated, as discussed hereinafter).
  • the disc screen embodiment 30 is positioned inside the drum screen 25 by insertion as shown.
  • the disc screen embodiment 30 comprises a series of driven disc rollers 26 mounted on an internal support frame 27, which has side walls 27a to maintain material on the disc screen embodiment 30 as such material travels along the top surface towards a discharge end.
  • the disc screen embodiment 30 remains anchored in place while the drum screen 25 is free to rotate 29 in a clockwise or anticlockwise direction.
  • the disc screen embodiment 30 has at least one or more anchor points. These anchor points fix the disc screen embodiment 30 to the apparatus, preferably the frame or housing of the drum screen 25, by means of bolting or pining; or with the use of some sort of mechanical locking device such as a twist lock, spring-loaded latch, or the likes.
  • FIG. 6 and 7 shows a disc screen embodiment 30 with four anchor points, illustrated by reference numbers inlet.
  • the drum screen 25 rotates 29 via a mechanical drive system.
  • This drive system comprises of at least one motor and coupling.
  • the drive motor(s) can be electric, pneumatic, or hydraulic; the drive coupling(s) can include a chain(s), sprocket(s), wheel(s), or the like.
  • This mechanical drive system is either mounted on the apparatus 38, or on the disc screen embodiment 30.
  • the combination of the disc screen 2 and the rotary drum screen 1 has a mixed material feed end 32, a discharge area for oversized material 33, a discharge area for midsized material 34, and a discharge area for undersized material 35.
  • Arrows 32, 33, 34 and 35 in FIG. 7 illustrate the direction in which the material flows through the combination of screens.
  • FIG. 8 illustrates cross-sectionally a range of alternative or optional disc roller 22 configurations. The illustrations describe these configurations in relation to the drum screen 25 and in relation to the flow of material from left to right:
  • the combination screen embodiment 38 is detachable 59 from the apparatus described above.
  • the combination screen 38 can be detachable in the same way that a known drum screen is detachable from a housing, illustrated in FIG. 11 by opening of a side housing 60.
  • the drum screen 25 and disc screen embodiment 30 are detachable from each other, as illustrated in FIG. 6 , allowing them to each operate as independent screens, so that the apparatus can operate as a standard trommel screen or as a standard disc screen.
  • these embodiments are detachable, they allow for a wide range of configurations to suite different applications.
  • the combination screen 38 can operate as part of a machine with two or more stream of particles sizes.
  • FIG. 9 is an illustration of apparatus capable of producing oversized, midsized, and undersized particles, commonly referred to as a ⁇ three-way-split' machine.
  • FIG. 9 illustrates the flow of material 47 through a three-way-split machine.
  • feed mixed material 39 as described above enters the combination screen 38 via the feeder 41.
  • the midsized and undersized particles 42 pass through the disc screen openings 31 and onto the drum's screening surface 14 below.
  • the oversize particles 40 flow on top of the disc screen 17 and exit the combination screen 38 at the discharge end 43 and onto a first discharge conveyor 48 for stockpiling.
  • the particles 42 that pass through the disc screen embodiment 30 flow along the drum screen 25 inner surface 14.
  • the undersized particles 44 pass through the drum screen 25 apertures 11 and on to another discharge conveyor 44 below for stockpiling.
  • the midsized particles 45 exits the combination screen 38 at the discharge end 45.
  • An inline discharge conveyor 46 collects the midsize particles 45 for stockpiling.
  • FIG. 10 is an illustration of apparatus capable of producing oversized and undersized particles, commonly referred to as a "two -way-split" machine.
  • FIG. 10 illustrates the flow of material 49 through a two-way split machine.
  • Feed mixed material 50 as described above enters the combination screen 38 via the feeder 51.
  • the midsized and undersized particles 52 pass through the disc screen openings 31 and onto the drum screening surface 14 below.
  • the oversized particles 53 flow on top of the disc screen 17 and exit the combination screen 38 at the discharge end 54.
  • the particles 52 that passes through the disc screen embodiment 52 flow along the drum screen inner surface 14.
  • the undersized particles 55 pass through the drum screen apertures 11 and on to a first inline under conveyor 56 and then a transverse discharge conveyor 55a for separate stockpiling.
  • the midsized particles 57 exit the combination screen 38 at the discharge end.
  • the first discharge conveyor 48 has been removed away from its position shown in Figure 9 , (for example by horizontal, vertical, or lateral movement, or a combination of same), and is not shown for clarity.
  • the oversize particles 53 from the top of the disc screen 17 exit at the discharge end 43 and fall, so that only one discharge conveyor 58 collects and discharges both the oversized 53 and midsized 57 particles together, for further processing or stockpiling.
  • the present invention provides a combination screening apparatus for screening a mixed material into three graded streams, comprising a disc screen wholly, substantially or partly located within a rotary drum screen.
  • the present invention is convenient on a mobile chassis with a simple arrangement of a feed hopper to feed a feed end, and a layered or stacked configuration for the discharge of the so-formed graded streams at a discharge end.

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  • Combined Means For Separation Of Solids (AREA)

Claims (14)

  1. Un appareil de criblage de combinaison pour le criblage d'un matériau mixte en trois flux calibrés, comprenant un crible à disques (1) placé entièrement, substantiellement ou partiellement au sein d'un crible à tambour rotatif (25), le crible à disques (1) étant monté sur un cadre de disques (27), le crible à tambour rotatif (25) étant entraîné en rotation sur ou par un cadre,
    caractérisé en ce que le cadre de disques est assujetti à chaque extrémité du cadre, et le crible à disques (1) demeure ancré en place et fixé au cadre par le biais d'un ou de plusieurs points d'ancrage (28a à d), tandis que le crible à tambour rotatif (25) est libre d'effectuer une rotation.
  2. Appareil tel que revendiqué dans la revendication 1, lequel est un appareil mobile, et lequel présente facultativement un châssis chenillé (62).
  3. Appareil tel que revendiqué dans n'importe laquelle des revendications précédentes comprenant en sus une ou plusieurs bandes transporteuses afin de transporter un ou plusieurs des trois flux calibrés à l'écart de l'appareil.
  4. Appareil tel que revendiqué dans la revendication 3 comprenant deux bandes transporteuses (6, 7) afin de transporter deux flux calibrés à l'écart de l'appareil.
  5. Appareil tel que revendiqué dans la revendication 3 comprenant trois bandes transporteuses (6, 7, 8) afin de transporter séparément les trois flux calibrés à l'écart de l'appareil.
  6. Appareil tel que revendiqué dans n'importe laquelle des revendications précédentes où le crible à disques (1) comprend une série de disques (23) montés sur des arbres entraînés (24).
  7. Appareil tel que revendiqué dans la revendication 6 où les disques (23) sont d'une forme sélectionnée dans le groupe comprenant : une forme en polygone, circulaire ou en étoile.
  8. Appareil tel que revendiqué dans la revendication 1 où le cadre de disques inclut un mécanisme d'entraînement de disques.
  9. Appareil tel que revendiqué dans la revendication 1 où le cadre de disques fournit des parois latérales (27a) au crible à disques (1).
  10. Appareil tel que revendiqué dans n'importe laquelle des revendications précédentes comprenant en sus une trémie d'alimentation (3) solidaire.
  11. Appareil tel que revendiqué dans n'importe laquelle des revendications précédentes où l'un ou l'autre du crible à disques (1) ou du crible à tambour rotatif (25), ou l'un et l'autre du crible à disques et du crible à tambour rotatif peuvent être retirés de l'appareil.
  12. Appareil tel que revendiqué dans la revendication 11 comprenant en sus un boîtier de crible rotatif ouvrable.
  13. Appareil tel que revendiqué dans n'importe laquelle des revendications précédentes où le crible à disques (1) présente une extrémité d'alimentation et une extrémité d'évacuation, et où l'extrémité d'évacuation est relativement plus haute par rapport à une surface du sol que l'extrémité d'entrée.
  14. Un procédé de calibrage d'un matériau mixte en trois flux calibrés, comprenant au moins les étapes consistant :
    à fournir un appareil de criblage de combinaison tel que défini dans la revendication 1 ;
    à placer le matériau mixte sur une extrémité d'entrée du crible à disques (1) ; et
    à faire fonctionner le crible à tambour rotatif (25) et le crible à diques (1) afin de fournir trois flux calibrés à partir de celui-ci.
EP21162485.3A 2021-03-15 2021-03-15 Appareil de criblage de combinaison Active EP4059623B1 (fr)

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EP4059623B1 true EP4059623B1 (fr) 2023-10-18

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Publication number Priority date Publication date Assignee Title
CN116116698A (zh) * 2023-03-20 2023-05-16 安徽柳绿朝烟农业生态发展有限公司 一种有机肥滚筒筛分装置

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US5361909A (en) * 1993-03-31 1994-11-08 Gemmer Bradley K Waste aggregate mass density separator
DE29809345U1 (de) * 1998-05-25 1998-10-22 Maschinenbau Farwick GmbH & Co. KG, 59302 Oelde Siebmaschine
GB2393638B (en) * 2002-08-22 2006-04-12 Carnell Contractors Ltd Aggregate cleaning
DE20309857U1 (de) 2003-06-25 2004-11-04 Doppstadt Calbe Gmbh Trommelsiebmaschine
ITVI20030142A1 (it) * 2003-07-16 2005-01-17 Seko Spa Dispositivo per la vagliatura
ITUB20155871A1 (it) * 2015-11-25 2017-05-25 Azienda Agricola Il Vallone Soc Agricola Macchina e metodo per vagliare un materiale sfuso

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