WO2018093783A1 - Appareil filtre-presse, systèmes et procédés - Google Patents

Appareil filtre-presse, systèmes et procédés Download PDF

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Publication number
WO2018093783A1
WO2018093783A1 PCT/US2017/061565 US2017061565W WO2018093783A1 WO 2018093783 A1 WO2018093783 A1 WO 2018093783A1 US 2017061565 W US2017061565 W US 2017061565W WO 2018093783 A1 WO2018093783 A1 WO 2018093783A1
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WO
WIPO (PCT)
Prior art keywords
filter
disposed
optionally
outlet
actuator
Prior art date
Application number
PCT/US2017/061565
Other languages
English (en)
Inventor
Lafe Grimm
Travis Thooft
Jake WALKER
Original Assignee
Superior Industries, Inc.
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 Superior Industries, Inc. filed Critical Superior Industries, Inc.
Publication of WO2018093783A1 publication Critical patent/WO2018093783A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
    • B01D25/006—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration by level measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/30—Feeding devices ; Discharge devices
    • B01D25/305—Feeding devices ; Discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/32—Removal of the filter cakes
    • B01D25/325—Removal of the filter cakes counter-current flushing, e.g. by air bumps

Definitions

  • Filter presses are used to filter and separate materials in various industries. Such filter presses sometimes incorporate actuators disposed to selectively compress a plurality of filter plates.
  • FIG. 1 is a front elevation view of an embodiment of a filter press.
  • FIG. 2 is a plan view of the filter press of FIG. 1.
  • FIG. 3 is a side elevation view of the filter press of FIG. 1.
  • FIG. 4 is a side elevation view of an embodiment of a filter plate.
  • FIG. 5 schematically illustrates an embodiment of a filtering system.
  • FIG. 6 is a front elevation view of another embodiment of a filter press.
  • FIG. 7 schematically illustrates an embodiment of a process for operating a filter press.
  • FIG. 8 schematically illustrates an embodiment of a control system for a filter press.
  • FIG. 9A schematically illustrates an embodiment of a hydraulic system.
  • FIG. 9B schematically illustrates another embodiment of a hydraulic system.
  • FIG. 10 schematically illustrates another embodiment of a process for operating a filter press
  • FIG. 1 1 is a partial side elevation view of an embodiment of a manifold for a filter press.
  • FIG. 12 schematically illustrates another embodiment of a filtering system.
  • FIG. 13 is a perspective view of another embodiment of a filter press.
  • FIG. 14 is a plan view of the filter press of FIG. 13.
  • FIG. 15 is a rear elevation view of the filter press of FIG. 13.
  • FIG. 16 is a side elevation view of the filter press of FIG. 13.
  • FIG. 17 is a sectional view along the section 16-16 of FIG. 16.
  • FIG. 18 is a plan view of an embodiment of a filter press trough.
  • FIG. 19 is a sectional view along the section 18-18 of FIG. 18.
  • Filter press embodiments are disclosed herein. Some embodiments include two filter packs disposed to be compressed along a parallel and/or common axis. Some embodiments include a fixed feed point and/or manifold.
  • FIGs. 1-4 illustrate an embodiment of a filter press 100.
  • the filter press 100 generally comprises a filter pack 200 and an actuator 1 10 disposed to selectively compress the filter pack 200.
  • a frame 300 optionally supports the actuator 1 10 and/or the filter pack 200.
  • the filter press 100 includes two filter packs 200-1 and 200-2 and two actuators 100-1, 100-2.
  • the actuators 100-1, 100-2 are optionally oriented to impose counteracting forces (e.g., in the illustrated embodiment the actuator 100-1 is oriented in a first direction and the actuator 100-2 is oriented in a second, opposite direction).
  • a first axis along which the actuator 100-1 imposes a first compressive force on the first filter pack 200-1 is optionally parallel to and/or aligned with a second axis along which the actuator 100-2 imposes a second compressive force 200-2.
  • only a single filter pack and a single actuator are included.
  • the frame 300 is optionally configured to alternatively support one or two filter packs and/or one or two actuators.
  • the two filter packs and frames are generally equivalent other than being optionally oriented in opposing directions.
  • the actuator 1 10 comprises a dual-acting actuator (e.g., a hydraulic dual-acting actuator) such that the actuator is alternately extendable (e.g., such that a
  • the actuator 1 10 comprises another type of actuator (e.g., screw actuator, electric linear actuator, pneumatic actuator).
  • actuator e.g., screw actuator, electric linear actuator, pneumatic actuator.
  • the actuator 1 10 is operably coupled to a follower 120.
  • a rod end 1 15 of the actuator 1 10 is rigidly coupled to the follower 120.
  • the follower 120 is optionally configured to compress the filter pack 200.
  • the follower 120 optionally has a surface extending to or past the vertical and horizontal extents of the filter pack 200.
  • the follower 120 optionally includes one or more strengthening features (e.g., plates, gussets, etc.) as illustrated.
  • the filter pack 200 comprises a plurality of filter plates 250.
  • any number of filter plates are included in each filter pack (e.g., 4, 6, 8, less than 10, 10, 20, 25, between 10 and 50, between 40 and 100, about 50, between 50 and 100, greater than 10, greater than 20, greater than 40, 100, about 100, greater than 100, between 50 and 200, between 100 and 200, greater than 150, greater than 200, etc.).
  • Each filter plate is optionally disposed generally vertically.
  • Each filter plate 250 is optionally movably (e.g., rollingly, slidingly) supported by the frame 300.
  • the filter plates 250 of the filter pack 200 are optionally moveable along a common direction (e.g., a horizontal direction).
  • Each filter plate 250 is optionally moveably (e.g., rollingly, slidingly) supported by one or more rails 350 of the frame 300.
  • the rails 350 are disposed at an upper corner of the filter pack 200 (e.g., a rail 350a may be disposed at the upper end of the filter pack 200 to a first lateral side of the filter pack and a rail 350b may be disposed at the upper end of the filter pack to a second lateral side of the filter pack); in alternative embodiments, one or more rails 350 may be positioned directly above or to the sides of the filter pack 200 for supporting the filter plates 250.
  • Each rail 350 optionally extends along the direction of movement of the filter plates 250.
  • each filter plate 250 includes one or more rollers 253 (e.g., roller 253a disposed on a first side of the filter plate and roller 253b disposed on a second side of the filter plate).
  • Each roller 253 optionally rollingly supports the filter plate 250.
  • Each roller 253 is optionally rotatably connected to the filter plate 250 by a bearing arm 252.
  • Each roller is optionally rollingly supported on a track 352.
  • Each track 352 is optionally supported on a rail 350.
  • Each track 352 optionally extends along a direction normal to the plane of the filter plate 250.
  • Each track 352 is optionally disposed vertically higher than and to the side of the filter plate 250. In alternative embodiments, the track 352 is disposed above the filter plate or to the right of the filter plate.
  • the frame 300 optionally includes a feed-end support 330.
  • the feed-end support 330 optionally rests on (e.g., is mounted to, such as by welding) a base 310.
  • the frame 300 optionally includes a follower-end support 320.
  • the follower-end support 320 optionally rests on (e.g., is mounted to, such as by welding) the base 310 or a separate structure.
  • the rail or rails 350 are optionally supported at a first end by the feed-end support 330 and at a second end by the follower-end support 320.
  • a lower rail or rails 325 are optionally supported at a first end by the feed-end support 330 and at a second end by the follower-end support 320.
  • the actuator 1 10 is optionally supported by the follower-end support 320.
  • the actuator 1 10 is optionally supported by an actuator mount 190.
  • the actuator mount 190 is optionally mounted (e.g., by welding) to the follower-end support 320.
  • the actuator mount 190 optionally includes a plurality of strengthening members 192 (e.g., ribs, gussets, plates, etc.).
  • the feed-end support 330 optionally includes a plate 332 or other support which supports one or more outlets 150, 160 and/or one or more inlets 130.
  • the frame 300 optionally includes first and second follower-end supports 320-1, 320-2 for supporting first and second filter packs 200-1, 200-2, respectively.
  • the filter plate 250 optionally includes a slurry inlet 259.
  • the filter plate 250 optionally includes one or more filtrate outlets 258 (e.g., disposed in the corners thereof as illustrated).
  • the filtrate outlets include upper filtrate outlets 258a, 258b and lower filtrate outlets 258c, 258d.
  • the filter plate 250 optionally includes one or more filter media 255 (e.g., cloth, felted cloth, woven cloth, coated medium, paper, etc.) disposed on the side of the filter plate and generally arranged between the slurry inlet 259 and the filtrate outlets 258.
  • filtrate is deposited directly from one or more filter plates 250 through one or more openings extending through a sidewall of each filter plate (e.g., into a trough disposed adjacent to the filter plates 250 and/or into conduits (e.g., flexible conduits such as transparent flexible conduits).
  • conduits e.g., flexible conduits such as transparent flexible conduits.
  • one of the filter packs 200 is illustrated schematically. In some embodiments, both filter packs are substantially similar and/or have one or more common features.
  • the filter pack 200 is illustrated in its compressed configuration (e.g., with actuator 110 extended to compress the filter pack). In the compressed configuration, the filter plates 250 are optionally compressed between the follower 120 and a plate 180. A tail plate 240t and/or head plate 240h are optionally disposed at opposing ends of the filter pack 200.
  • Slurry optionally moves from a slurry source Ss into the filter press 100 (e.g., upon being pumped by a pump 510) via a slurry inlet 130 (e.g., an inlet having a flange connection 132 (FIG.
  • the inlet slurry Si then optionally passes through a manifold 1100.
  • the manifold 1100 is optionally supported at least partially by the plate 332.
  • the manifold 1100 is optionally stationary (e.g., in a fixed position relative to the frame 300.
  • the manifold 1100 is optionally disposed between the filter packs 200-1, 200-2.
  • the manifold 1100 (described in more detail herein) optionally directs the inlet slurry Si to an inlet channel Ic formed by slurry inlets 259 of the filter plates 250.
  • the filter media 255 cause a filter cake (e.g., at least partially dewatered slurry) to accumulate in chambers C between filter plates.
  • filtrate streams F flow into the filtrate outlets 258.
  • filtrate streams Fa, Fb, Fc, Fd flow into the filtrate outlets 258a, 258b, 258c, 258d, respectively.
  • the filtrate streams F optionally comprise a fluid (e.g., water) including less aggregate material than the inlet slurry F.
  • the filtrate streams F optionally enter the manifold 1100.
  • the manifold 1100 optionally directs the upper filter streams Fa, Fb to an outlet 150 (e.g., an outlet having a flanged connection 152).
  • the manifold 1 100 optionally directs the lower filter streams Fc, Fd to the outlet 160 (e.g., an outlet having a flanged connection 162).
  • the filtrate streams F optionally enter an external manifold 550 (optionally including an on-off valve for selectively retaining the filtrate in the filter press).
  • the manifold 550 optionally combines the filtrate streams into a single output filtrate stream Fo.
  • FIG. 1 1 An exemplary embodiment of a manifold 1 100 is illustrated in FIG. 1 1.
  • the manifold 1 100 is in fluid communication with filter packs 200 via openings in plates 180-1 (not shown), 180-2.
  • the plate 180-2 and associated components of the manifold 1 100 are illustrated in FIG. 1 1 ; in some embodiments, the manifold includes corresponding components in fluid communication with plate 180-1 on the other side of the filter press 100.
  • Openings 1 158a, 1 158b, 1 158c, 1 158d are optionally in fluid communication with the filtrate outlets 258a, 258b, 258c, 258d, respectively.
  • the openings 1 159-1, 1 159-2 are optionally in fluid communication with the inlet channels Ic of the filter packs 200-1, 200-1, respectively.
  • the inlet 130-1 is optionally in fluid communication with the opening 1 159-1 via a conduit 1 130-1.
  • a valve 1 135-1 e.g., gate valve, ball valve, etc.
  • the inlet 130-2 is optionally in fluid communication with the opening 1 159- 2 via a conduit 1 130-2.
  • a valve 1 135-2 e.g., gate valve, ball valve, etc.
  • the openings 1 158a, 1 158b are optionally in fluid communication with the outlet 150-2 via a conduit 1 150-2.
  • the openings 1 158c, 1 158d are optionally in fluid communication with the outlet 160-2 via a conduit 1 160-2.
  • a core blow pump 1210 e.g., an air compressor or other suitable device
  • an airstream Ai from an air source As (e.g., ambient air) into the inlet channel Ic.
  • the pump 1210 is optionally in fluid communication with the inlet channel Ic via the inlet or inlets 130 and/or the manifold 1 100.
  • the airstream Ai optionally expels additional filtrate from the outlets 150, 160 and/or further dries the filter cakes accumulated in chambers C.
  • the filter cakes are optionally removed from the chambers C by retracting the actuator 1 10 such that the filter pack 200 is reconfigured into an open configuration in which a lateral spacing is opened between adjacent filter plates 250.
  • a linkage assembly 260 connects the filter plates 250 and/or the follower 120 such that retraction of the actuator 1 10 results in the filter plates 250 being pulled apart by the follower 120.
  • the linkage assembly 260 comprises a plurality of links 262 connecting adjacent filter plates. Each link 262 optionally comprises a slot which slidingly engages a corresponding pin disposed on the filter plate 250.
  • Each link 262 optionally has a first configuration in which the pin is disposed at a first end of the slot for pulling the filter plates apart and a second configuration in which the pin is disposed at a second end of the slot for permitting the filter plates to approach and/or contact one another.
  • FIG. 9A An embodiment of a hydraulic system 900A for controlling the actuator 1 10-1 and/or actuator 1 10-2 is illustrated in FIG. 9A.
  • a pump 910 e.g., a hydraulic motor
  • the first controller 930 is optionally in fluid communication with the head end and rod end chambers of the actuator 1 10-1.
  • the first controller 930 optionally includes at least one valve (e.g., a directional valve) for selectively retracting and extending the actuator 1 10-1.
  • the first controller 930 optionally includes at least one valve (e.g., a pressure control valve such as a pressure reducing-relieving valve) for selectively setting one of a range of pressures in the actuator 1 10-1 (e.g., in the head end chamber thereof).
  • the second controller 930 is optionally in fluid communication with the second controller 940.
  • the second controller 940 is optionally in fluid communication with the head end and rod end chambers of the actuator 1 10-2.
  • the second controller 940 optionally includes at least one valve (e.g., a directional valve) for selectively retracting and extending the actuator 1 10-2.
  • the second controller 940 optionally includes at least one valve (e.g., a pressure control valve such as a pressure reducing-relieving valve) for selectively setting one of a range of pressures in the actuator 1 10-2 (e.g., in the head end chamber thereof).
  • a pressure control valve such as a pressure reducing-relieving valve
  • the pump 910 is in direct fluid communication with the second controller 940; in other embodiments, the pump 910 supplies fluid to the second controller 940 via the first controller 930.
  • the first and second actuators 1 10-1, 1 10-2 may be actuated simultaneously (e.g., extended simultaneously and/or retracted simultaneously) and/or substantially simultaneously.
  • the second controller 940 may be omitted such that the controller 930 is in direct fluid communication with both the actuators 1 10-1, 1 10-2.
  • the first and second actuators 1 10-1, 1 10-2 may be actuated alternately (e.g., the first actuator may be extended and retracted, then the second actuator may be extended and retracted).
  • FIG. 9B Another embodiment of a hydraulic system 900B is illustrated in FIG. 9B.
  • separate pumps 910-1, 910-2 supply hydraulic fluid to separate controllers 930-1, 930-2 respectively.
  • Each controller 930 is optionally in fluid communication with the head end and rod end chambers of the associated actuator 1 10.
  • Each controller 930 optionally includes at least one valve (e.g., a directional valve) for selectively retracting and extending the associated actuator 1 10.
  • Each controller 930 optionally includes at least one valve (e.g., a pressure control valve such as a pressure reducing-relieving valve) for selectively setting one of a range of pressures in the associated actuator 1 10 (e.g., in the head end chamber thereof).
  • a common pump 910 supplies hydraulic fluid to both controllers 930-1, 930-1.
  • the hydraulic systems 900 A and/or 900B carry out a process 1000 (see FIG. 10) for controlling the primary actuator or actuators 1 10.
  • the hydraulic system optionally extends the primary actuator or actuators 1 10 at a high flow rate (e.g., above a threshold flow rate) and a low pressure (e.g., below a threshold pressure).
  • the control system optionally retains the primary actuator or actuators in the extended position at a low flow rate (e.g., below the threshold flow rate) and a high pressure (e.g., above the threshold pressure).
  • slurry is optionally pumped into the filter pack or filter packs 200 while the high pressure is retained in the actuator or actuators 1 10.
  • the primary actuator or actuators 1 10 are optionally retracted at a high flow rate and a low pressure.
  • FIG. 6 an embodiment of a filter press 600 is illustrated having one or more actuators 610 (e.g., hydraulic actuators, pneumatic actuators, electric actuators) for selectively separating a subset of filter plates 250 from the remainder of the filter pack 200.
  • the actuator 610 is optionally mounted to a stationary portion of the filter press (e.g., the follower-end support 320).
  • the actuator 610 e.g., a rod end 615 thereof
  • the rod end 615 is attached (e.g., rigidly mounted, pivotally mounted) to an arm 620 of the filter plate 250i.
  • the intermediate filter plate 250 is optionally disposed between the tail filter plate 250t and the head filter plate 250h.
  • a plurality of actuators 610 may be operably coupled to the filter plate 250i at a plurality of locations and/or operably coupled to a plurality of filter plates 250.
  • a pump 810 e.g., a hydraulic motor
  • the controller 830 is optionally similar to the controller 930 described above.
  • the controller 820 is optionally in fluid communication with one or more actuators 610 (e.g., 610a, 610b).
  • a hydraulic line 613h optionally fluidly connects the controller 820 to a head end chamber of each of the actuators 610.
  • a hydraulic line 613r optionally fluidly connects the controller 820 to a rod end chamber of each of the actuators 610.
  • the controller 820 optionally comprises a valve (e.g., a directional valve, a flow control valve, etc.) configured to selectively extend and retract the actuator or actuators 610.
  • Hydraulic lines 1 13h, 1 13r optionally fluidly connect the controller 830 to the head end chamber and rod end chamber, respectively, of the actuator 1 10.
  • each step may comprise controlling one or more primary actuators 1 10 and/or secondary actuators 610.
  • the system 800 optionally extends both the primary actuator 1 10 and secondary actuator 610.
  • the system 800 optionally sets a desired pressure in the primary actuator 1 10.
  • slurry is optionally pumped into the filter pack 200.
  • air is blown through the filter pack 200.
  • the system 800 optionally retracts the primary actuator 1 10, which optionally separates a first subset of filter plates 250 (e.g., the filter plates between the intermediate filter plate 250i and the filter plate 250t) such that filter cake can fall from the first subset of filter plates.
  • the system 800 optionally retracts the secondary actuator 610, which optionally separates a second subset of filter plates 250 (e.g., the filter plates between the intermediate filter plate 250i and the filter plate 250h) such that filter cake can fall from the second subset of filter plates.
  • the filter plates are optionally repetitively displaced (e.g., shaken, vibrated) by a suitable apparatus to further separate filter cake from the filter plates 250.
  • the systems, apparatus, and methods described with respect to FIGs. 6 through 8 may be implemented on a filter press having two filter packs which may be fed by a central feed point as described herein (e.g., with respect to FIG. 1).
  • FIGs. 13-17 another embodiment of a filter press 1300 is illustrated. As shown in FIG. 13, in some implementations a plurality of filter presses (e.g., filter presses 1300- 1, 1300-2) may be employed; in some implementations a single filter press may be employed.
  • a plurality of filter presses e.g., filter presses 1300- 1, 1300-2
  • a single filter press may be employed.
  • the filter press 1300 optionally comprises a conduit assembly 1310 directing a fluid (e.g., slurry, water, a mixture comprising water and one or more contaminants, etc.) from an inlet 1305 to a filter pack 1400.
  • a fluid e.g., slurry, water, a mixture comprising water and one or more contaminants, etc.
  • the filter pack 1400 is optionally selectively compressed by one or more actuators 1390.
  • the filter pack 1400 optionally comprises a plurality of filter plates 1410 (e.g., filter plates 1410a to 1410m as illustrated).
  • the filter plates may comprise recessed filter plates such as those available from Lenser in Senden, Germany.
  • Each filter plate optionally comprises a filter medium 1416 supported on a frame 1412.
  • Each filter plate 1410 is optionally supported (e.g., rollingly supported) on one or more rails 1310 (e.g., rails 1310-1, 1310-2).
  • each filter plate 1410 includes an upper frame 1414 having one or more rollers 1417; each roller 1417 is optionally rollingly supported on an associated rail 1320.
  • the upper frame 1414 is optionally width- adjustable.
  • each filter plate 1410 is optionally joined to an adjacent filter plate by a link 1480 (e.g., a slotted link pivotally coupled to the filter plate).
  • the links 1480 are disposed above the rails 1320 and/or rollers 1317.
  • the links 1480 are disposed above filter medium 1416 (e.g., cloth, felted cloth, woven cloth, coated medium, paper, etc.) of the filter plate 1410.
  • fluid from the conduit assembly 1310 enters a conduit formed by openings 1415 in each filter plate 1410.
  • the filter plate 1410 optionally includes one or more outlets 1418 in fluid communication with the opening 1415 via the filter medium 1416.
  • Fluid pressure optionally forces fluid (e.g., a filtrate) through the filter media 1416 to one or more outlets 1418 (e.g., upper outlet 1418a and lower outlet 1418b, which may be in fluid
  • a trough 1500 e.g., either directly by gravity or by transfer via another conduit, pan, trough or other structure.
  • the actuator 1390 and/or additional actuator(s) optionally pull the filter plates 1410 apart into a separated or partially separated configuration.
  • material collected on the filter media e.g., filter cake
  • material collected on the filter media optionally falls from the filter plates to a location below the filter pack 1400 for storage or further processing.
  • a filter plate washing process e.g., using wash wands
  • a pan 1370 or other structure diverts water or other fluids that drip from the filter pack 1400 in a closed configuration (or during a filter plate washing process) into the trough 1500.
  • the pan 1370 is selectively displaceable (e.g., pivotally openable) to allow filter cake or other materials to fall without being captured on the pan (e.g., when the filter plate is in a separated or partially separated configuration).
  • the conduit assembly 1310 (e.g., pipe assembly) optionally includes a conduit 1312 which is optionally in fluid communication with the filter pack 1400 via an inlet conduit 1316.
  • the conduits 13 12 and 1316 are optionally selectively fluidly coupled by a selectively closeable valve 1313.
  • the inlet conduit 1316 is optionally selectively in fluid communication with a core blow relief conduit 1314.
  • An outlet of the conduit 1314 is optionally disposed to deposit material (e.g., liquid, slurry, particulate, solids, etc. which may be removed from the filter pack during a core blow process) into the trough 1500 (e.g., at an opening 1505 of the trough as shown in FIG. 16).
  • the conduits 1316 and 1314 are optionally selectively fluidly coupled by a selectively closeable core blow relief valve 1315.
  • a core blow process is carried out in which air is blown into the filter pack 1400 (e.g., from a tail end thereof and/or through the channel formed by openings 1415) in order to remove further liquid and/or other materials from the filter pack.
  • the core blow relief valve 1315 is optionally opened during the core blow process.
  • the valve 1313 is optionally closed during the core blow process.
  • the trough 1500 optionally comprises a housing 1510 having one or more openings 1505 (e.g., upper openings) for receiving material from the filter plate outlets 1418 and/or from the core blow relief conduit 1314. Materials optionally flow along a bottom surface 1513 of the trough toward outlets 1550, 1570.
  • a baffle 1512 optionally blocks materials from passing directly to the outlet 1570 before filling a collection area 1515 which is optionally disposed above outlet 1550.
  • materials e.g., slurry, relatively contaminated water, water and contaminant or other particulate or solid materials, etc.
  • materials passing through outlet 1550 is recirculated to the filter pack 1400.
  • materials (e.g., clean water, substantially clean water, relatively clean water, etc.) passing through outlet 1570 are directed to a storage container for later use (e.g., for washing equipment, etc.).
  • a valve 1560 (e.g., knife gate or other valve) is disposed to selectively close the outlet 1550.
  • a liquid presence sensor 1580 is disposed to detect a liquid level above (e.g., slightly above) the bottom surface 1513 of the trough.
  • the liquid presence sensor 1580 may comprise an electronic liquid presence sensor or a float-operated switch or other level sensor configured to generate a first signal when fluid fills the trough at or above a threshold level and a second signal when fluid fills the trough below a threshold level.
  • a filter cycle optionally includes one or more of the following processes, optionally in the sequence described herein: (1) a closing process in which the filter pack is closed and optionally compressed, (2) a filling process in which the closed filter pack is filled with slurry or other materials, (3) an optional core blow process as described above, and (4) an opening process in which the filter pack is opened and filter cake is discharged from the filter press.
  • the valve 1560 is open during the filling process such that liquid entering the trough from the filter pack (e.g., from outlets 1418) is recirculated to the filter pack 1400.
  • the water level in the trough decreases such that the sensor 1580 generates a signal indicating that the trough liquid level has decreased below the threshold level.
  • the valve 1560 is closed (e.g., immediately, after a predetermined delay, upon additionally sensing a threshold pressure in the filter press, etc.) such that liquid (e.g., clean water, substantially clean water, relatively clean water) exits the outlet 1570 (e.g., after rising to the top of the collection area 1515).
  • valve 1560 is then optionally opened upon the beginning of a new filter cycle (e.g., upon the beginning of a filling process thereof), at which time any solid or contaminant material built up in the collection area 1515 during the prior filter cycle is optionally deposited through the outlet 1550.
  • the filter presses described herein optionally include (e.g., additionally or alternatively) one or more features in common with the filter press embodiments described in U.S. Patent Nos. 4, 108,776 and 5,855,778, the disclosures of which are hereby incorporated by reference herein.
  • Ranges recited herein are intended to inclusively recite all values within the range provided in addition to the maximum and minimum range values. Headings used herein are simply for convenience of the reader and are not intended to be understood as limiting or used for any other purpose.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Des modes de réalisation de filtre-presse sont décrits. Certains modes de réalisation comprennent une pluralité de packs de filtres et d'actionneurs. Certains modes de réalisation comprennent une vanne à auge pour la manipulation sélective de fluides et de boues. Certains modes de réalisation comprennent un point d'alimentation stationnaire et/ou un collecteur d'alimentation. Certains modes de réalisation comprennent un premier actionneur pour comprimer un pack de filtre et un second actionneur pour retirer un sous-ensemble de plaques de filtre du pack de filtre.
PCT/US2017/061565 2016-11-17 2017-11-14 Appareil filtre-presse, systèmes et procédés WO2018093783A1 (fr)

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CN109821285A (zh) * 2019-04-09 2019-05-31 温州商学院 一种生活污水过滤利用系统
US11478730B2 (en) * 2019-12-12 2022-10-25 M.W. Watermark, L.L.C. Filter press assembly

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US20040149649A1 (en) * 2001-03-30 2004-08-05 Seiji Uchiyama Filter press type dewatering system, dewatering method, deaerator, check valve, and opening/closing valve
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109821285A (zh) * 2019-04-09 2019-05-31 温州商学院 一种生活污水过滤利用系统
CN109821285B (zh) * 2019-04-09 2021-01-15 温州商学院 一种生活污水过滤利用系统
US11478730B2 (en) * 2019-12-12 2022-10-25 M.W. Watermark, L.L.C. Filter press assembly

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