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WO2020191114A1 - Appareil et procédé de séparation à haut rendement de matériaux à l'aide d'une stratification - Google Patents

Appareil et procédé de séparation à haut rendement de matériaux à l'aide d'une stratification Download PDF

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Publication number
WO2020191114A1
WO2020191114A1 PCT/US2020/023458 US2020023458W WO2020191114A1 WO 2020191114 A1 WO2020191114 A1 WO 2020191114A1 US 2020023458 W US2020023458 W US 2020023458W WO 2020191114 A1 WO2020191114 A1 WO 2020191114A1
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Prior art keywords
water
particles
media
assembly
heavy
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Ceased
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PCT/US2020/023458
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English (en)
Inventor
Thomas A. Valerio
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/36—Devices therefor, other than using centrifugal force
    • B03B5/38—Devices therefor, other than using centrifugal force of conical receptacle type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/623—Upward current classifiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

Definitions

  • This application relates to an apparatus for separating materials or separating materials in a high throughput manner.
  • waste streams are composed of a variety of types of waste materials.
  • ASR automobile shredder residue
  • WSR whitegood shredder residue
  • Other waste streams may include electronic components, building components, retrieved landfill material, incinerator ash which can be bottom ash or combined ash, and other industrial waste streams. These materials generally are of value only when they have been separated into like-type materials. However, in many instances, cost-effective methods are not available to effectively sort waste streams that contain diverse materials. This deficiency has been particularly true for non-ferrous materials.
  • This application discloses a system for separating materials in a waste stream, having a feeder; a unit with one or more sorting sections comprising a processing media disposed within the unit, wherein the processing media comprise a specific gravity; a mixer or paddlewheel configured to rotate in a manner that generates an agitation of the processing media within the sorting section; at least two impellers that cause agitation and vertical motion of the processing media and that are configured to separate the waste stream into at least a light portion and a heavy portion within each of the one or more sorting sections; one or more discharge devices of the unit is configured to receive and discharge the heavy portion from the unit; and the outlet of the first sorting unit is configured to receive the light portion from the processing container of the first sorting unit.
  • This system can have a closed circuit water system.
  • This application discloses about system and method for removing waste material from recovered water for reuse. After removing waste material, the water is conserved for eliminating the worldwide issue of water scarcity. This application also focuses on the separation of heavy and light particles from the recovered water.
  • a system for removing waste material from recovered water comprising, a density separator installed to the system for separating heavy and light waste particles by using water or media, a purification assembly connected to the density separator for cleaning the water to reuse, wherein the purification assembly further comprising, at least one clarifier attached to the purification assembly for cleaning the water, a layer cleaning assembly connected to the clarifier to set apart the heavy and light particle, a refining assembly mounted on the clarifier for removing light particles to obtain clean water, a velocity separation assembly mounted on the clean water tank for extraction of the heavy particles and a decanter connected to the velocity separation assembly for settling down heavy particles to reuse the clean water.
  • Media can be obtained from the water circuit.
  • first step is to transfer the water from the density separator to the purification assembly
  • next step is to set a part the heavy and light particle from the water by using the layer cleaning assembly, after that removing of the light particles through the refining assembly
  • next step is settling down the heavy particles for reusing the clean water and the last step for storing the clean water in the clean water tank.
  • Yet another aspect includes a method for collecting media from a water purification circuit having the steps of: collecting waste water from system; removing metals, sand, and aggregate from the waste water; separating heavy metals from the waste water dewatering the waste water to leave a media and clean water.
  • the media can be conveyed to a system that uses media.
  • FIG. 1 illustrates a schematic view of the density separator.
  • FIG. 2 illustrates an interior view of the density separator.
  • FIG. 3 illustrates a top view of the density separator.
  • FIG. 4 illustrates perspective view of the system for removing waste material from recovered water.
  • FIG. 5 illustrates block diagram of the method for removing waste material from recovered water.
  • this disclosure includes methods and systems for separating materials in a waste stream.
  • the present disclosure presents a sorting apparatus with the use of up/down (or vertical) motion flow of water or other media, which can be thought of as a cascaded density separator.
  • a sorting apparatus with a unit with two or more sections together where key separations may occur.
  • the system has sections that are rectangular shaped sections in a linear arrangement.
  • the multisectional system includes a rectangular housing having an interior surface, an inlet and an outlet.
  • a waste or media stream is introduced into the inlet of a first separator unit via an infeed conveyor, slide chute, or pre-wet infeed system.
  • Water or other media can fill each or all of the units to a predetermined level.
  • Each of the units e.g., at or near the top of the system, can have a mixer or a paddlewheel or similar component (capable of moving water) that may be powered (or unpowered) to agitate the water in an up/down motion, side-to-side motion, alternating circular motion, or forward accelerating motion, or combinations of the aforementioned.
  • the energy of the paddlewheel is transferred to the water, forcing the water out to move or pulse or accelerate or shift accordingly.
  • the system can hold a substantial amount of water or media due to its rectangular shape and its depth.
  • the additional water or media allows for improved resonance time.
  • A“section” can an area that is substantially effected by the waves and physical motion of the impeller and need not boxed areas.
  • FIG. 1 illustrates schematic view of the (multisectional) density separator 108.
  • the density separator includes multiple rectangular/box-shaped unit 120 to provide more control over the agitation and forces separating the material. More specifically, in this arrangement, the slurry or product stream is fed into the unit 120, and from the first section, the slurry or product stream flows into the second section, and from the second section the slurry or product stream flows into the third section, and so forth.
  • the paddlewheel in some or all of the units creates agitation, a shear force, and an upward/rising current.
  • the density separator 108 is installed in the system for separation of heavy and light waste particles.
  • the density separator 108 consists of an inlet and outlet for input and output of the waste particle for further process.
  • An impeller 110 is in each section.
  • the density separator 108 can separate the particles by the help of specific gravity and a paddle wheel 109.
  • a conveyor 122 can be below the unit 120 to collect the heavies from the unit.
  • FIG. 2 shows another example of the system 100 in which there are multiple paddlewheels oriented with their rotating shaft vertical, causing rotational motion.
  • a system may locate the rotating paddlewheels in an alternating pattern to drive the majority of the products in an S-curve along the length of the apparatus.
  • the stratification from the vertical motion or up/down motion is generated through an axial connection.
  • Such connection allows for water or other media to be entered into the unit.
  • Such water or media that enters through the axial connection generates an upward and downward motion, therefore the third-dimension of the separation apparatus.
  • the axial connection may also be tangential and in the form of a chamber.
  • One example of the stratification apparatus can be an air-over-water pulsating chamber. In such an example, air inside a chamber expands and contracts creating an upward and downward flow of water into the unit through the axial or tangential connection.
  • the waste materials are mixed with media or water to create an initial slurry and to improve the separation as the material slurry is forcibly mixed with the media or water in the initial unit.
  • the slurry may have about the same specific gravity (SG) as the media in the unit into which the slurry flows.
  • FIG. 3 illustrates top view of the density separator 108, the paddle wheel 109 is attached to the center-top portion of the density separatorl08.
  • the paddle wheel 109 rotates for generating turbulence in the water. This turbulence helps in separation of the heavy and light particles.
  • system can have a mechanism to control the rotational speeds of the paddle wheels. For illustration, system can set the first paddle wheel at a first step (e.g., 30 rpm) and the second paddle wheel at a second speed (e.g., 60 rpm).
  • This arrangement creates further separation of the particles and materials in the media by creating a shear force between the particles, whereby water/media will fill the space between particles, possibly in a visually stretched orientation when compared to the zone before the paddle wheel.
  • the paddle wheel 109 speed may vary at every process. The speed of the paddlewheel 109 is from 30 to 60rpm.
  • the water that contains heavy and light particles also called slurry.
  • the continuous infeed of water or media displaces the contained water/media, causing to overflow the exit port/weir of the apparatus, and more water can now enter.
  • Materials to be sorted can enter the unit through a feed chute/inlet located, e.g., on the top of the unit next to or above or below the paddlewheel 109.
  • the paddlewheel comprises a horizontal shaft that extends from one side of the apparatus to the other, above the water/media, and each blade enters and exits the top of the water/media as the paddle rotates on axis.
  • fixed paddles or plates are provided. In operation, the paddlewheel 109 rotates to generate an agitation of the water or media.
  • the motion generated by the paddlewheel can be controlled motion, e.g., through control of the paddlewheel drive mechanism.
  • the paddlewheel 109 and other elements can provide an active bath with motion and shear forces in each of the sections.
  • Multiple paddlewheels 109 can be employed to produce several different agitation functions.
  • the sections may have adjustable weir plates to control spacial separation.
  • the heavy fraction drops to the bottom of the sections.
  • the efficiency of the separation can be changed by either decreasing or increasing the resonance time and adjusting the average speed of the fluid.
  • Adjustable weir plates also allow the control of the discharge of water/media through the heavies discharge outlet as compared to the lights discharge outlet, and consequently add additional control of the amount of rising current to control or eliminate that effect.
  • sensors whether in the sections or outside thereof, can be operatively linked to the paddlewheel to maintain a desired agitation state within the sections.
  • the frequency and the amplitude of the forces/waves in the sections can be set to optimize separation efficiencies. These parameters can be used to control the resonance time of particles.
  • These sensors can adjust drive mechanisms to produce an optimal paddlewheel speed.
  • the agitation motions produce shear forces that force materials to move inside the sections. The resulting action causes heavier particles to be liberated from the lighter particles.
  • the heavier products that sink to the bottom are discharged at the bottom of the unit with the use of a discharge device such as a movable gate or rotary valve, screw auger, bucket conveyor, drag conveyor, or any other device to move the heavier particles or that prevent the continuous discharge of water but allows the heavier recyclables to exit when the device is energized.
  • a discharge device such as a movable gate or rotary valve, screw auger, bucket conveyor, drag conveyor, or any other device to move the heavier particles or that prevent the continuous discharge of water but allows the heavier recyclables to exit when the device is energized.
  • the lighter materials stay in suspension near the top of the unit are eventually discharged continuously by the carrying current through discharge opening located on the opposite end of the unit or the entry/exit point of each zone or unit.
  • the rotational speed of the paddlewheel(s) 109 as well as the frequency and stroke of the stratification/pulsation apparatus of the unit may be varied to optimize the separation process, and side injection ports along the sides and ends of the sections.
  • these three effects are combined into a single separation unit in which several principles come into play such as the Archimedes Principle, which explains how the apparent weight of an object immersed in water decreases.
  • Other principles applied due to the density separation includes the Hindered Settling effect, the Consolidation Trickling effect, as well as the Jerk Effect also referred to as the Jolt Surge effect that is caused by both the motion created by the paddlewheel and the up ward/ down ward movement of the stratification/pulsation apparatus.
  • the paddlewheel need not be in each and every unit, while multiple paddle wheels can sub-divide the various zones of a single longer unit.
  • the upward and/or downward motion of the water or media enhances the separation by reducing the amount of lighter materials that are misplaced or entangled with heavier materials that sink to the bottom of the density separator.
  • Such upward and downward motion referred to as the third separation dimension, can be provided through the axial or tangential pipe or chamber in the form of pulses that generate upwards and downward currents or pulses of water or other media.
  • Such inflow and outflow of water/media to the unit generates a momentary rising current of water that improves the separation efficiency and a momentary downward flow of water allows for the heavier particles to stratify.
  • the abrupt changes in direction causes increased and decreased acceleration that allow the entangled products to break free from one another.
  • the pulsing motion occurs in the last unit, however, the pulsing motion may occur in one or more or all of the sections. The pulsing can have a jolting effect on the particles.
  • the heavier materials that sink are discharged through a material discharge device such as a valve, gate, rotary valve, sealed bucket conveyor or sealed screw conveyor or sealed drag conveyor to allow for the heavier materials to exit the unit while controlling the amount of water or media that flows through the material exit.
  • a material discharge device such as a valve, gate, rotary valve, sealed bucket conveyor or sealed screw conveyor or sealed drag conveyor to allow for the heavier materials to exit the unit while controlling the amount of water or media that flows through the material exit.
  • the additional water or media that is required to make up for the lost water or media that abandons the unit through the lighter material discharge, or the heavy material discharge zones may be added through the pulse chamber, and/or through the infeed chute or zone, and/or individual water/media inlet/injection ports along the sides and possibly near the bottom of each zone.
  • the separated products produced in the density separation apparatus may be designated as follow: (1) the "lights”, which are discharge through an exit passage located near the top of the top of each unit; (2) the “heavies”, which consists of the heavies that sank to the bottom of the unit.
  • the heavies can be collected by one or more under- water belt conveyors or screw conveyors 122 or drag conveyors that lift the product above or near the water/media-line or rotary vein gates adequately sized for the largest particles intended to flow through the system.
  • the media or fluid used in the recovery system may be any liquid capable of washing the materials and causing the metal to suspend into the process fluid.
  • the recovery system may use chemicals which can extract and suspend the desired constitute. Examples of such solutions are well known to those of skill in the art. One example of such a solution is water.
  • chemicals, minerals and or any magnetic material that can be used to change the specific gravity of the fluid to obtain an actual constant specific gravity range of 1.0 to 3.0 SG depending on the application.
  • the media or fluid includes inorganic dirt, sand, glass fines, ferrous fines and combinations thereof.
  • the apparatus can use inorganic media fines that can come from automobile shredder residue fines, shredder fines from Hammermill operations, ferrous slag or inorganic fine byproducts from incineration and/or pyrolysis operations. Further, other minerals that may be mixed in a landfill containing metals can be recovered and used as media.
  • media with a specific gravity of 1.5 SG or higher By using media with a specific gravity of 1.5 SG or higher, the costs to an operator can be reduced or nullified, that is, the costs to the operator may be net zero.
  • Media with a specific gravity of 1.5 SG or higher can be used to separate into organics and from inorganics.
  • the apparatus can have sensors connected to computers that incorporate algorithms to maximize efficiencies of the separation and maintain control of the water or media SG.
  • the computer algorithms can optimize variables (e.g., paddlewheel speed) to obtain a desired separation.
  • the media SG can be maintained by addition of media constituents including water and inorganic media concentrates. Sensors can monitor the current SG state while computer control of the media constituents can be used to maintain the desired target SG.
  • the vertical motions of the density separator enhance the separation efficiency of the materials by processing high throughputs and reducing the limitations of typical recyclable materials such as moisture content and the necessity of a discrete size range.
  • the density separator may provide a cost-effective method of concentrating recyclable materials into discrete specific gravities doing so at higher throughputs than typical sorting technologies. Such discrete specific densities are determined by the frequency, amplitude, or speed of the water or media generated by the paddlewheel as well as by the inflow and outflow of water through the bottom pipe interconnecting the pulse chamber.
  • the system may incorporate a free, not hindered, settling regime.
  • a rising currents may be induced to effect different separation in one or more of the sections.
  • the circuit must be regarded as a whole for both design and operational purposes. Equipment for each stage must be matched with the rest of the circuit, both in terms of capacity and performance.
  • FIG. 4 illustrates perspective view of the system for removing waste material from recovered water
  • a purification assembly 100 is connected to the density separator 108.
  • the purification assembly 100 is a water treatment module with clean water store tank 107.
  • the purification assembly 100 is used for the separation of heavy and light particles from the recovered water.
  • the purification assembly 100 separates the particle by specific gravity.
  • the specific gravity of heavy /light and density separator 108 is same.
  • the particles that have high specific gravity are metals and particles having low specific gravity are nonmetals.
  • the clarifiers 101 receive the recovered water from the density separator 108 with a help of a pump.
  • the pump is interconnected to the clarifier 101 and the density separator 108.
  • the pump fetches the water from the density separator 108 to fill the clarifier 101.
  • the clarifierlOl can be designed to overflow the water at same rate that the water fetched in the clarifier 101.
  • the particles of size up to 19mm or higher may present in the recovered water. Weight of the particles in the recovered water is from 5 to 50 percent that may contain the metals and nonmetals.
  • a layer cleaning assembly 102 is connected to the clarifier.
  • the layer cleaning assembly 102 used to set apart the heavy and light particles.
  • the layer cleaning assembly 102 separates the particles of size 2mm or larger from the recovered water. These particles may utilize in other work.
  • the specific gravity is used for the separation of particles, that specific gravity of particles is same as in the density separator.
  • the sieve screen is used for filtering the recovered water. Basically, the sieve screen consists of small pours that do not allow the particles to pass through upon passing the recovered water. These sieve screen may also remove between 8 to 15 percent of moisture from particles.
  • the sieve screen aperture is a barrier made up of crisscross connection of thin wires. These wires are made of fiber. Due to fiber material the sieve screen aperture becomes flexible and ductile in nature.
  • a refining assembly 103 is mounted on the clarifier 101.
  • the refining assembly 103 removes the light particles from the recovered water.
  • the light particles removed from the water are smaller than 0.074 mm.
  • the particles that are greater than 0.074mm are conveyed for further process.
  • a trimming assembly is connected in the refining assembly to reduce the size of particles. After reduction in the size, the particles are passed by the sieve screen for removing the water.
  • a sand scrubber and water jet 105 is connected to the refining assembly 103 for the separation of aluminum, sand, glass, rock and other similar particles. These particles are smaller than 0.074mm but the specific gravity is greater than 1.5.
  • the waterjet 105 also separates the particles that are greater than 0.05mm. The particles that are in between 0.05mm to 0.074 mm are useful particles. The remaining slurry may transfer to a velocity separation assembly 104.
  • the velocity separation assembly 104 is used for the extraction of heavy particles.
  • the particles that are smaller than 2mm also have low specific gravity.
  • the velocity separation assembly 104 uses a settling velocity of the particles that is higher than the upward velocity of the overflow water. Due to the settling velocity a pre fall of particles may occur that decreases a large ratio of particles from the recovered water. But there are some particles that may settle at the bottom of recovered water due to buoyancy force and passed through sieve screen.
  • the buoyancy force causes objects to float.
  • Buoyancy is cause by differences in pressure acting on opposite sides of an object immersed in a static fluid. It is also known as the buoyant force.
  • An object is immersed in a liquid may experience an upward force that is known as buoyant force.
  • a pressure in the fluid column increases with depth.
  • the pressure at the bottom of an object submerged in the fluid is greater than the force on the top. The difference in this pressure results in a net upward force on the object that defined as buoyancy.
  • the recovered water moves to a decanter 106.
  • the decanter 106 is connected to the velocity separation assembly 104.
  • the decanter 106 is used for settling the heavy particles to reuse the recovered clean water.
  • a horizontal centrifugal decanter is used as decanter 106 in the purifier for separation of particles.
  • the centrifugal decanter used to employ a high rotational speed to separate components of different densities.
  • the centrifugal decanter separate particles from the slurry.
  • a clean water tank 107 is associated with the layer cleaning assembly 102. The clean water tank 107 may store the recovered clean water that may passes through the sieve screen in the purification assembly 100.
  • the recovered water is pumped into the centrifugal decanter through an inlet.
  • the recovered water moves to a cylindrical part and conical part. These parts may rotate, and the separation takes place in the cylindrical part.
  • the rotation generates centrifugal forces up to 4000XG. Under these forces, the particles with higher density are collected and compacted on the wall of the cylinder.
  • a screw conveyor rotates inside the cylinder at a different speed. The screw conveyor is transporting the settled particles along the cylindrical part and up to the end of the conical part, the recovered water particle leaves by an opening in the centrifugal decanter.
  • the clean recovered water leaves through an internal centripetal pump.
  • sensors whether in the unit or outside thereof, can be operatively linked to the paddlewheel 115, 215 to maintain a desired agitation state within the unit.
  • the frequency and the amplitude of the forces/ waves in the units can be set to optimize separation efficiencies. These parameters can be used to control the residence time of particles.
  • the axial or tangential pipe or chamber 150 may generate a constant inflow of water or media rather than constant pulsating streams of water. Such continuous upflow of water will still generate a dimension of separation to enhance the efficiency of the separation and may be used when processing different materials.
  • the pulsating upward and downward motion may be used when processing prone to entanglement recyclables such as recyclables containing insulated or bare wire. The inflow and outflow of water will reduce the chances for light recyclables from ending on the heavy fraction.
  • the initial entry of material may yield nearly 50% or 60% or 70% or more of the desired separation by the force and turbulence of the material entering the unit.
  • Method and systems to deliver media or materials with force or at high velocity include bare slides and slides including those having coatings to reduce the coefficient of friction or mechanical-assisted conveyors.
  • ultrahigh-molecular-weight polyethylene (UHMW-PE) can prevent sticky particles from adhering to the surface. This type of conveying surface lends itself to reduced product adherence and allows expedition of the separation and cleaning processes.
  • the method for aforementioned system comprising the steps of, first step is to transfer the water from the density separator to the purification assembly, next step is to set a part the heavy and light particle from the water by using the layer cleaning assembly, after that removing of the light particles through the refining assembly, next step is settling down the heavy particles for reusing the clean water and the last step for storing the clean water in the clean water tank.
  • the water may reuse as the invention clean the unwanted particles from the recovered water.
  • the invention also stores the clean water for later use.
  • the method and system can include a water and media cycle as illustrated in FIG. 5.
  • the processed water is returned via a pump to the water treatment module.
  • the solids content of the return water may anywhere from 5 to 50% by weight, and include solids up to 19mm or higher, and contain diverse materials such as various non-metals (e.g., plastics and aggregates) and metals.
  • Water that contains suspended solids, such as the return water is called a“slurry”.
  • the water from the“heavies” is cleaner and has the same specific gravity as the process, which last produced it and may be returned to the process or a holding basin.
  • the materials associated with the non-metals tends to have a lower specific gravity and tend to be much less consistent in both size and content.
  • Stage 1 Solids Removal system which can remove and dewater all solids at a defined size (e.g., approximately 2mm (adjustable) or larger), and convey those solids onto a separate conveyor for transmission to a waste pile/bunker or for further processing by another process.
  • This material may have an SG closer to that of the process.
  • Stage 1 can have a dewatering device or screen (e.g., horizontal screen or other screen). This is a pre-screening and dewatering step.
  • the high frequency screen can remove moisture to between 8% and 15%.
  • the remaining slurry is pumped to the Stage 2A Solids Removal system, which will remove and dewater particles approximately and for illustration 200 mesh (0.074mm) (adjustable) and larger, and convey those solids to a pile/bunker, containing primarily aggregates.
  • the material greater than 200 mesh can be further processed for example through comminution (e.g., a ball mill). Comminution is the reduction of solid materials from one average particle size to a smaller. Comminution of solid materials can be performed by different types of crushers and mills. After such processing, such material may be fed back to the Stage 2A sieve or screen or system. Step 2A can be done with high frequency screens and hydro-cyclones.
  • Stage 2A is a larger sand particle removal step down a specific size (e.g., 1 mm) and density (e.g., about 2.1 SG).
  • Suitable equipment can include a sand wheel or sand washer or combination of sand screw and vibrating screen and hydrocyclones.
  • Step 2A may remove aluminum, sand, glass, rock (200 mesh or above). In one example, the material less than 200 mesh and having specific gravity greater than 1.5 can be removed using hydrocyclone or the like - this may be optimal media for certain separation application.
  • Stage 2B Further separation of the remaining slurry can proceed to Stage 2B which targets to remove and dewater higher SG smaller particulates between 50 micron and 200 mesh.
  • Stage 2B can use 4” hydrocyclones that are tuned to remove higher SG particles for example greater than 50 micron, resulting in valuable or useful media between 50 micron and 200 mesh.
  • the remaining slurry of low SG particles approximately 2mm and smaller is transferred to one or more clarifiers.
  • the clarifiers are designed to overflow water at the same rate that water is introduced, such that the upward velocity of the overflow water is less than the downward velocity (“settling velocity”) of the particles, so the overflow water is particle-free.
  • Stage 3 can be a screening step and dewatering step, which can be done with, e.g., screens, high frequency screen.
  • the settled solids are pumped from the bottom of the clarifier to the Stage 4 Solids Removal System, a horizontal centrifugal decanter, which uses high-g forces to remove remaining solids, leaving an essentially solids-free source of process water, which is recirculated to the clarifier or any of the return water sumps.
  • the solids may be used for media application in another process.
  • This multi-stage process is essential to properly removing and dewatering solids from, e.g., wet density separation plants.
  • a water treatment system to clean process water not only allows closed-loop processing of the wet plant, which minimizes system discharge to the environment, but also provides generation of potential material streams that could be used for media in media-based wet density separation plants (e.g., materials from Stage 2 or Stage 4).
  • Stage 4 is dewatering or fine particle removal, which can be accomplished by e.g., centrifugal decanter (vertical or horizontal or similar equipment identified for stage 2. In another example, the equipment used in Stage 4 may be similar to that in Stage 2.

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

L'invention concerne un système pour séparer des matériaux dans un flux de déchets comprenant un dispositif d'alimentation et une unité ayant une ou plusieurs sections de tri, présentant une roue à aubes, et un support de traitement disposé à l'intérieur de l'unité.
PCT/US2020/023458 2019-03-18 2020-03-18 Appareil et procédé de séparation à haut rendement de matériaux à l'aide d'une stratification Ceased WO2020191114A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021061860A1 (fr) * 2019-09-23 2021-04-01 Valerio Thomas A Procédés et systèmes pour la séparation à haut rendement de matériaux à l'aide d'un mouvement de stratification et de rotation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB547099A (en) * 1940-11-07 1942-08-13 Frederick Trostler Improvements in or relating to the separation of solid materials of different specific gravities
GB664290A (en) * 1948-04-20 1952-01-02 Stamicarbon An improved process for the separation according to specific gravity of mixtures of particles differing in grain size and specific gravity
WO2000003807A1 (fr) * 1998-07-16 2000-01-27 Olivier Paul A Systeme et procede de separation et de recuperation/recyclage de dechets solides et de flux de dechets
US20140069821A1 (en) * 2012-05-23 2014-03-13 High Sierra Energy, LP System and method for treatment of produced waters
WO2018102617A1 (fr) * 2016-11-30 2018-06-07 Valerio Thomas A Appareil et procédé pour séparer des matériaux par stratification

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB547099A (en) * 1940-11-07 1942-08-13 Frederick Trostler Improvements in or relating to the separation of solid materials of different specific gravities
GB664290A (en) * 1948-04-20 1952-01-02 Stamicarbon An improved process for the separation according to specific gravity of mixtures of particles differing in grain size and specific gravity
WO2000003807A1 (fr) * 1998-07-16 2000-01-27 Olivier Paul A Systeme et procede de separation et de recuperation/recyclage de dechets solides et de flux de dechets
US20140069821A1 (en) * 2012-05-23 2014-03-13 High Sierra Energy, LP System and method for treatment of produced waters
WO2018102617A1 (fr) * 2016-11-30 2018-06-07 Valerio Thomas A Appareil et procédé pour séparer des matériaux par stratification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021061860A1 (fr) * 2019-09-23 2021-04-01 Valerio Thomas A Procédés et systèmes pour la séparation à haut rendement de matériaux à l'aide d'un mouvement de stratification et de rotation
US12059687B2 (en) 2019-09-23 2024-08-13 Thomas A. Valerio Methods and systems for high throughput separation of materials using stratification and rotational motion

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