• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A filter plate assembly for a filter press is provided. The filter plate assembly includes at least a first filter plate and a second filter plate, which cooperate to define a filter chamber when the first filter plate and the second filter plate are in a filtering position. At least one of the first filter plate and the second filter plate is movable from the filtering position to a discharge position in which a filter cake can be discharged. In other configurations, the filter plate assembly can include a first filter plate, a second filter plate and a center filter plate or frame, which cooperate to define a filter chamber. The center filter plate or frame is movable from a filtering position to a discharge position.
    公开号:ES2803959A2
    申请号:ES202090047
    申请日:2019-04-11
    公开日:2021-02-01
    发明作者:Sean R Duby
    申请人:Sean R Duby；
    IPC主号:
    专利说明:

    [0002] Set of discharge filter plates for filter press
    [0004] INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATION
    [0006] This application claims the benefit of U.S. Provisional Patent Application. 62 / 656,228, entitled “DISCHARGE FILTER PLATE ASSEMBLY FOR FILTER PRESS”, filed on April 11, 2018.
    [0008] This application hereby incorporates, by reference, in its entirety, the provisional application identified above.
    [0010] STATE OF THE PRIOR ART
    [0012] Technical sector of the invention
    [0014] The present invention relates to an improved filter plate assembly, and related methods and devices, for separating solid and liquid components from a mixture.
    [0016] Description of Related Art
    [0018] Separating the liquid and solid components from a mixture of liquid and solid, or sludge, is a necessary or desirable process in many industries. One procedure for filtering sludge that has relatively high concentrations of solid matter uses an apparatus known as a filter press. In existing filter presses, the solid particle “cake” remaining in the filter cavity must be removed in preparation for a subsequent filter cycle. This cleaning process has one or more drawbacks. In many cases, removal of the particulate cake requires that the filter plates be separated from each other, individually, or all at once, to allow the cake to be discharged from the filter cavity. Because up to one hundred or more individual plates can be used, the cleaning process can be time consuming.
    [0020] In other cases, it is possible that the particulate cake is discharged from the filter chambers of the filter press while the individual filter plates are kept in a substantially compact or condensed position. One way of achieving this is for the perimeter of each filter chamber to be configured to have an open section, as disclosed in Applicant's US Patent 7,396,472. A closure may be configured to close the open section, and the closure may be removed from the open section to allow the particulate cake to be removed from the filter chamber while the filter plates are in the condensed position. Although this approach allows individual filter plates to remain in a compact or condensed position, current methods and devices for removing cake under this approach may fail to completely dislodge or remove particulate matter remaining within the interior of the filter. filter chamber after the particle cake has been discharged. Also, with this approach, the open section of the filter chamber can be difficult to seal completely when the filter press is in use. In addition, with this approach, the spray assembly or the spray nozzle of the filter press washing apparatus is contained within the filter chamber. An internal wash mechanism, as opposed to the external one, such as the one mentioned, can result in clogging or blockage of the wash fluid inside the filter chamber.
    [0022] CHARACTERISTICS
    [0024] One or more embodiments involves a set of filter plates and / or a filter press incorporating the set of filter plates. The filter plate assembly comprises at least a first filter plate and a second filter plate, which collaborate to define, at least partially, a filter chamber, when the first filter plate and the second filter plate are in filtering position, aligned with each other along an operating axis. At a minimum, one of the first filter plate and the second filter plate are movable out of alignment with the operating axis or in a direction normal to the operating axis, to a discharge position where a filter cake can be discharged. from a portion of the filter chamber defined by the movable filter plate (s). In some configurations, the download process can be performed automatically, without the need for an operator. In some configurations, at a minimum, a support structure movably supports the movable filter plate (s) for movement between the filter position and the discharge position. In some configurations, the filter plate assembly comprises a first filter plate and a second filter plate, in which one or both filter plates define a cavity with a recess, which defines the filter chamber when the filter plates are in the filter position. In other configurations, the set of Filter plates comprise a first filter plate, a second filter plate, and a central plate or filter frame, as described hereinafter. One or both of the first filter plate and the second filter plate may also form a portion of another set of filter plates. For example, the second filter plate may form one end of a filter cavity on a first side of the second filter plate, and one end of another filter cavity on a second side of the second filter plate.
    [0026] In one embodiment, a filter plate assembly comprises a first filter plate having a first side surface, a second filter plate having a second side surface, and a center plate or frame having an outer surface and an inner area. The center plate or frame is configured to be movable between a filtering or aligned position and a discharge or spaced position with respect to the first filter plate and the second filter plate. In the filtering position, the center plate or frame is held in place between the first side surface and the second side surface. In the discharge position, the first filter plate and the second filter plate are separated from the center plate by a certain distance, which allows the center plate to drop or move to or into the discharge position, after which the particle cake is discharged from the inner zone of the central plate.
    [0028] In another embodiment, the filter plate assembly comprises a first filter plate and a second filter plate. The first filter plate and the second filter plate have a filter position in which the plates are aligned with one another along an operating axis, and collaborate to define, at least partially, a filter chamber. The first filter plate can be moved out of alignment with the second filter plate and away from the operating axis to a discharge position, where the filter cake can be discharged from a defined filter chamber portion, such as at least partially by at least one of the first filter plate and the second filter plate.
    [0030] One embodiment involves a set of filter plates and / or a filter press incorporating the set of filter plates. The filter plate assembly comprises at least a first filter plate and a second filter plate, which collaborate to define, at least partially, a filter chamber. At a minimum, a spray assembly is movably supported relative to one or both of the first filter plate and the second filter plate. At a minimum, the spray assembly can be displaced out of alignment with the operating axis or in a direction normal to the operating axis, to direct the spray means toward one or both of the first filter plate and the second filter plate.
    [0032] BRIEF DESCRIPTION OF THE DRAWINGS
    [0034] These and other features, aspects, and advantages of the present filter plate assembly are described with reference to the drawings of the preferred embodiments. These embodiments are intended to illustrate, but not limit, the present invention.
    [0036] Figure 1 is a perspective view of a filter press that incorporates a set of filter plates that has certain characteristics, aspects and advantages of the present invention. The filter plate assembly is shown in a retracted position. The fluid hoses connecting the source of the flushing fluid to the spray assemblies have been eliminated.
    [0038] Figure 2 is a top view of the filter press of Figure 1.
    [0040] Figure 3 is another perspective view of the filter press of Figure 1.
    [0042] Figure 4 is a side view of the filter press of Figure 1.
    [0044] Figure 5 is a perspective view of the filter press of Figure 1 with the filter plate assembly in an open or unloaded position. The center plates of the filter plate assembly are shown in an aligned (or raised) position. Fluid hoses connecting flushing fluid source to spray assemblies shown.
    [0046] Figure 6 is a top view of the filter press of Figure 5 with the fluid hoses removed.
    [0048] Figure 7 is a perspective view of the filter press of Figure 5 with the fluid hoses removed.
    [0050] Figure 8 is a side perspective view of the filter press of Figure 5 with the fluid hoses removed.
    [0051] Figure 9 is a perspective view of the filter press of Figure 5 with the center plates of the filter plate assembly shown in a separate (lower or discharge) position.
    [0053] Figure 10 is another perspective view of the filter press of Figure 9 with the fluid hoses removed.
    [0055] Figure 11 is a side perspective view of the filter press of Figure 9 with the fluid hoses removed.
    [0057] Figure 12 is a cross-sectional view of a filter plate assembly comprising a first filter plate, a second filter plate, and a center plate shown removed from the filter press, along with associated vertical rails, and filter assemblies. sprayed also removed from the filter press.
    [0059] Figure 13 is a side view of the filter plate assembly and associated vertical rails, spray assemblies and the force generator of Figure 12.
    [0061] Figure 14 is a perspective view of the filter plate assembly and associated vertical rails, spray assemblies, and force generator of Figure 12.
    [0063] Figure 15 is a perspective view of the filter plate assembly and associated vertical rails, spray assemblies and the force generator of Figure 12, with one of the filter plates removed.
    [0065] Figure 16 is a perspective view of the filter plate assembly and associated vertical rails, spray assemblies, and force generator of Figure 12, with the center plate shown in a separate (or downward) position.
    [0067] Figure 17 is a perspective view of the filter plate assembly and associated vertical rails, spray assemblies, and force generator of Figure 16, with one of the filter plates removed.
    [0069] Figure 18 is a perspective view of a filter plate having a cavity with a recess, of the filter plate assembly of Figure 12.
    [0070] Figure 19 is a perspective view of the center plate of the filter plate assembly of Figure 12.
    [0072] Figure 20 is a perspective view of a filter plate having a cavity with a recess.
    [0074] Figure 21 is a perspective view of a filter plate assembly comprising a first filter plate and a second filter plate shown removed from the filter press, along with associated vertical rails, and spray assemblies. also removed from the filter press. In the filter plate assembly of Figure 21, at least one of the filter plates is a filter plate having a cavity with a recess, as shown in Figure 20.
    [0076] Figure 22 is a perspective view of the filter plate assembly and associated vertical rails, spray assemblies, and force generator of Figure 21. The filter plate of Figure 20 is shown in a separate position (or down).
    [0078] Figure 23 is a perspective view of a filter press incorporating a plurality of filter plate assemblies, omitting the support rails or tracks for the movable filter plates. A coupling element can engage more than one of the movable filter plates, to selectively displace the movable filter plates. One or more force generators can be configured to move the coupling element. In some configurations, the number of force generators is less than the number of moving filter plates. The filter plate assemblies are shown in an open position, and the movable filter plates in a lower or discharge position.
    [0080] Figure 24 is a side view of the filter press of Figure 23 with the fluid hoses removed.
    [0082] Figure 25 is a side view of the filter press of Figure 23 with the fluid hoses removed and the filter plate assemblies shown in an aligned (or top) position.
    [0083] DETAILED DESCRIPTION
    [0085] A filter press is used to separate liquid and solid components from a mixture of liquid and solid, such as sludge or mud. For example, the filter press described herein is generally designated 10, and can be used to filter a process liquid, industrial waste, municipal waste, or perform component separation in other environments. The filter press 10 can also be used in various other industries. Filter press 10 includes a set of filter plates generally designated by reference numeral 100. Filter press 10 and / or set of filter plates 100 are configured, at least in some embodiments, to allow partially or fully automated discharge of the particle cake. Such an arrangement can reduce operating costs by eliminating the need for a person to perform manual cleaning of the filter plates, as is customary in prior art filter presses.
    [0087] In one embodiment, a set of filter plates 100 includes a first filter plate 130, a second filter plate 130, a center plate or frame 120, and a force generator 510. Each of the first filter plate 130 and the Second filter plate 130 has handles (or other support structures) 132 on opposite sides of plate 130. Handles 132 allow filter plates 130 to be supported by a pair of horizontal side rails 12. Preferably, the handles 132 are slidably coupled to the upper surface of the side rails 12, such that the filter plates 130 can be moved along the rails 12, to allow the individual filter plates 130 to move. separate from each other (eg, to allow the filter plate assembly 100 to move from a retracted to an expanded position). The central plate 120 is supported so that it can be movable with respect to the side rails 12 in the vertical direction. The center plate 120 may be referred to as a movable plate. In other embodiments, such as those where the filter plate assembly 100 does not include a center plate 120 (for example, a cavity plate arrangement with a recess, such as that shown in Figures 20-22) , the movable plate can be any plate or plates of the stack of filter plates, including, but not limited to one or both of the first filter plate 130 and the second filter plate 130. Similarly, the term "Center plate" in the present invention may be replaced by the term "movable plate" in view of embodiments in which plates other than the center plate are movable, unless otherwise indicated. In some configurations, the center plate 120, which moves or slides within a pair of vertical rails or tracks 18 supported by the side rails 12 or relative to the themselves, it can be movable between an aligned position (upper position as shown) and a separate position (lower position, as shown) with respect to the first filter plate 130 and the second filter plate 130. When moved To the detached position, the center plate 120 is lowered or lowered toward the ground by the force of gravity or is forcibly displaced by the force generator 510. Preferably, the center plate 120 remains slidably engaged with the vertical rails 18 after movement to or to the detached position. Sudden stopping of the force generated by the center plate 120 after being lowered or forcibly displaced to the spaced position results in the removal of the particle cake from within the center plate 120. The center plate 120 is manufactured to resist sudden stop after descending or being moved to the separated position.
    [0089] In a preferred embodiment, the force generator 510 is a pneumatic cylinder that uses a compressed gas (eg, air) as the operating fluid. In other embodiments, the force generator can be a hydraulic cylinder, a screw jack, or any other suitable arrangement. In some configurations, the associated filter plate assembly 100 or filter press 10 does not include a force generator. For example, movable filter plate 120 can be manually moved between the filter or aligned position and the discharge position. While in the aligned position, the center plate 120 is located between a surface of the first filter plate 130 and a surface of the second filter plate 130, and is held in position by the force exerted by the pneumatic cylinder until the The filter plates of the filter press 10 are tightly pressed against each other, at which point the central plate 120 is held in place by the clamping force of the first and second plates 130. To move it to the separation position , the center plate 120 is no longer supported by the force of the pneumatic cylinder or the pneumatic cylinder pulls the center plate 120 down to or to the detached position. For example, the separated position is achieved when the compressed gas from the pneumatic cylinder is expelled or released to the atmosphere, and allows the center plate 120 to lower to the separated position. The pneumatic cylinder can be used to raise the center plate 120 back to the alignment position after the cleaning process is complete. Alternatively, the pneumatic cylinder can pull the center plate 120 toward or into the detached position and can also be used to raise the center plate 120 back to the aligned position. The pneumatic cylinder (or other force generator) can be arranged for each center plate 120 or it can be configured to drive multiple center plates of the multiple filter plate sets of a filter press.
    [0090] In some embodiments, the interior area of the center plate 120 defines, at least partially, a filter chamber 124 as shown in Figure 15, with the filter chamber 124 having openings on either side of the center plate 120. While in use In the aligned position, the openings on each side of the central plate 120 are delimited and, when the plates are pressed against each other, they are sealed by the surfaces of the first filter plate 130 and the second filter plate 130, accordingly. such that the filter chamber 124 is in a closed position. The surfaces of the filter plates 130 facing the filter chamber 124 and delimiting the openings of the filter chamber in the closed position are flat or generally flat, such that the entire thickness of the filter chamber 124 it is determined by the thickness of the center plate 120. In other embodiments, the filter chamber is defined, in part or in whole, by recessed cavities in adjacent filter plates.
    [0092] In other embodiments, instead of the center plate 120 lowering or lowering to the ground solely by the force of gravity, the center plate or frame 120 is further pushed down by human force. The center plate 120 is manufactured to resist sudden stop after reaching the detached position, even when pulled downward by human force.
    [0094] In some embodiments, the vertical rails 18 that support the center plate 120 are supported or at least limited in their movement by the side rails 12, which support the first and second filter plates 130. Such an arrangement is well suited for applications. reconversion. Although called vertical rails, rails 18 may be arranged in other orientations, as explained herein. Accordingly, it is not intended to limit the lanes to a vertical orientation unless specifically stated. In other embodiments, the center plate 120 is mounted within a pair of vertical rails 18 that are supported by a pair of pendant rails 14 located on the pair of side rails 12. Preferably, a connection, such as a brace or strut. 200, extends between the vertical rails 18 and can connect them. The brace 200 is supported by the hanging rails 14 and allows the vertical rails 18 to slide in a sliding manner relative to the top surface of the hanging rails 14. Optionally, the vertical rails 18 can be further stabilized by a pair of rails of frame retention 16 located below the pair of side rails 12. Such an arrangement may provide greater stability to the vertical rails 18. However, other suitable arrangements may be used to support the movable plate or plates 120. For example, the movable plate or plates 120 may be supported directly or indirectly by the force generator 510 or other support structure that displaces or facilitates movement of the movable plate or plates 120. In some configurations, the movable plate or plates 120 can only be directly supported by the support 202, the force generator 510 and the brace 200. In other words, the vertical rails 18 and any corresponding structures can be omitted. In addition, in other configurations , the movable plate or plates 120 may not be directly supported at all. The side rails 12 of the filter press 10, in general, can capture the moving plate or plates 120 and hold them in a position associated with the filter press 10.
    [0096] In other embodiments, the center plate or movable plate 120 is provided with a washing apparatus 300 or components of a washing apparatus 300. The washing apparatus 300 is connected to a source of washing fluid 400. The washing apparatus 300 comprises one or more spray assemblies or spray nozzles 310, 320. The spray assembly or spray nozzle 310, 320 is attached to, or is movable along with, the outer surface of the center plate 120, and is positioned on the outside of each of the first filter plate 130, the second filter plate 130, and the central plate 120. Advantageously, such an arrangement allows easier cleaning of the filter chamber 124. When the central plate or plate Movable 120 moves up or down relative to each of the first filter plate 130 and the second filter plate 130, the spray assembly 310, 320 moves with the center plate or movable plate 120 and washes or cleans the middle filter plates from the first and second (or adjacent) filter plates 130. In the arrangement shown, the spray assembly 310, 320 is supported by means of a bracket 202, such as an inverted U-shaped bracket, which is connected to center plate 120.
    [0098] In other embodiments, the pair of pendant rails 14 may be provided with other devices or apparatus. Alternatively, the pair of hanging rails 14 may serve as a pair of specific support rails, that is, rails that serve only to support the vertical rails 18 within which the central plate or movable plate 120 is mounted. In other embodiments, the pair of specific support rails may be a pair of rails other than the pair of pendant rails 14.
    [0100] Although in the arrangement shown, the center plate or movable plate 120 moves vertically downward with respect to the first and second (or adjacent) filter plates 130 to take advantage of the action of gravity to move the center plate or movable plate 120 ; this provision is not precise. The central plate or the movable plate 120 it can move out of contact with the first and second (or adjacent) filter plates 130 in either direction. In other words, in a filtering position, the filter plates 130 may be aligned along a longitudinal axis, which may be referred to as the operating axis. The movable filter plate or plates 120 may be moved in any direction that is normal to the operating axis or has a component of motion that is normal to the operating axis. For example, the plates 120 can be displaced in a horizontal or vertical direction, or they can be rotated about an axis, such as an axis that is offset from the operating axis and that can be parallel to the operating axis. Such an arrangement may allow better access to a receptacle for the particular cake or may be necessary due to lack of available space under the filter press 10.
    [0102] In Figures 1 to 19 another embodiment is shown. Included in this embodiment may be components, features, and advantages of other embodiments, which are not otherwise described or shown in Figures 1-19. In addition, the components, features, and advantages of this embodiment may be included in other embodiments.
    [0104] In the embodiment of Figures 1-19, the filter plate assembly 100 includes a first filter plate 130, a second filter plate 130, and a center plate or frame 120. In the arrangement shown, the filter press 10 includes, likewise, a set of 500 force generators; however, as explained above, it is possible to have arrangements in which there are no force generators 500 and the moving plates are moved manually or by some other mechanism. The interior area of the center plate 120 defines a filter chamber 124 (as shown in Figure 15), with the filter chamber 124 having an opening on either side of the center plate 120. While in the aligned position, the Openings on either side of central plate 120 may be delimited and sealed by the surfaces of first filter plate 130 and second filter plate 130, such that filter chamber 124 is in a closed position. Figures 1 through 4 show the filter plate assembly 100 in a retracted position, with the center plates 120 of the filter plate assembly 100 in an aligned position relative to the first and second filter plates 130. The surfaces of the Filter plates 130 facing the filter chamber 124 and delimiting the openings of the filter chamber in the closed position are flat or, in general, flat, so that the entire thickness of the filter chamber 124 is determined by the thickness of the center plate 120. However, as explained above, the set of filter plates 100 could include a set of filter plates that have recessed cavities that collaborate with the adjacent filter plate to define a filtering chamber. In such an arrangement, the inner plates usually have a cavity on each side, such that a particular plate cooperates with the cavity of the adjacent plate on each side to define a filter chamber with each adjacent filter plate. End plates usually have only one cavity on the inside. In this way, the thickness of the filter chamber is partially defined by the cavity of each filter plate. The following description is in the context of an assembly having a center plate 120; however, the same description can be applied to a set of plates having recessed cavities. Accordingly, the reference to center plate 120 may refer to any movable plate in a set of plates that has recessed cavities.
    [0106] As shown, for example, in Figures 1, 3 to 5 and 7 to 11, the set of force generators 500 comprises a force generator 510 arranged for each center plate 120. Each force generator 510 is located and maintained in position above the respective center plate 120. For example, each force generator 510 can be supported by brace 200 and can be connected to center plate 120 through bracket 202. Force generators 510 facilitate downward and / or upward movement of center plate 120 (relative to first filter plate 130 and second filter plate 130) during and after discharge of the particle cake from filter chamber 124. Force generator 510 can push center plate 120 downward toward or to a separate position with respect to the first filter plate 130 and the second filter plate 130. Alternatively, the center plate 120 can lower or lower to the ground or to a separate position (any lower position as shown) only with the force of gravity. Figures 9-11 show the filter plate assembly 100 in an expanded position with the center plates 120 of the filter plate assembly 100 in a separate (or lower) position relative to the first and second filter plates 130. Force generator 510 can also be used to raise center plate 120 upward to alignment position. In each of these cases, the center plate 120 is preferably moved or slid within a pair of vertical rails 18 that are supported by one or both of a pair of side rails 12 and a pair of pendant rails 14. The Figures 5 to 8 show the filter plate assembly 100 in an expanded position with the center plates 120 of the filter plate assembly 100 in an aligned position (or upward) with respect to the first and second filter plates 130. The position of the center plates 120 shown in Figures 5 to 8 can be either before the center plates 120 move to the separate position (under the force of the force generators 510 or solely under the force of gravity) such as after the center plates 120 have been moved upward back to the alignment position (and before the filter plate assembly 100 has been returned to a retracted position) .
    [0108] The force generators 510 are supported directly or indirectly by means of a pair of hanging rails 14. The force generators 510 can be pneumatic cylinders using a compressed gas as the operating fluid. The force generators 510 can also be hydraulic cylinders. Other types of force generators 510 can also be used. In addition, the force generators 510 can be located in any suitable location to displace the movable filter plates 120. For example, as shown in Figures 1, 3 to 5 and 7 to 11, the force generators 510 may be located on each respective center plate 120. Force generators 510 may also be located below each respective center plate 120. In some configurations, the force generators 510 are pneumatic cylinders located both above and below the center plates 120 and exerting a pressure, for example, of about 45.4 kg (100 pounds) each. In other configurations, instead of having a specific force generator 510 for each center plate 120, a single force generator may be provided that is coupled (or can be coupled) to multiple center plates 120, such as a sub-assembly or the all of the center plates 120. For example, two force generators may be arranged, in the form of hydraulic cylinders, each of the hydraulic cylinders being coupled to approximately half of the available center plates 120 and configured to exert a pressure, by For example, approximately or up to 2,268 kg (5,000 pounds) each.
    [0110] In addition to providing force to facilitate upward and / or downward movement of each center plate 120, force generators 510, individually or in combination, can be used to provide the force necessary to maintain the first filter plate 130, the second plate filter 130 and center plate 120 in the aligned position. In the aligned position, the center plate 120 is located between the surface of the first filter plate 130 and the surface of the second filter plate 130, and is held in position by the force exerted by the force generator or generators 510. However, in general, a specific force generator (or force generators), separate from the force generators 510 associated with each center plate 120, will be arranged for this purpose and will compress the collection of filter plate assemblies in the direction axial in a similar way to conventional filter presses or the same as them.
    [0111] In a typical filter plate assembly 100 comprising a first filter plate 130 and a second filter plate 130 (and no center plate 120), the first and second filter plates 130 are squeezed or held together by a pressure comprised between 1,360.8 kg and 1,814.4 kg (3,000 and 4,000 lbs), or even up to 4,535.9 kg (10,000 lbs) or more in some configurations, to maintain tightness between filter plates 130 at treatment pressures , which can be approximately 6.89 x 105 N / m2 (100 psi) in filter mode and between 13.79 x 105 N / m2 and 17.24 x 105 N / m2 (200 to 250 psi) in the compression mode of a membrane filter cake. In the embodiment of Figures 1 to 19, the first filter plate 130, the second filter plate 130, and the center plate 120 can be pressed or held together by a greater force compared to a set of recessed cavity plates, because center plate 120 may be more susceptible to deformation than a recessed cavity plate. Also, in at least some configurations, the center plates 120 can be held in the aligned position by this clamping force without the aid of the force generators 510 used to move the center plates 120 into and out of the aligned position. .
    [0113] The pressure created within the cavity defined by the first filter plate 130, the second filter plate 130, and the center plate 120 in an aligned or sealed position during the filtration process can result in the center plate 120 becoming expand in the radial direction as a result of internal pressure. Side rails 12 can provide support to inhibit expansion, in the radial direction, in response to forces generated by internal pressure. Additionally, or alternatively, the first and second filter plates 130 and the center plate 120 may be keyed together to inhibit expansion of the center plate 120, in the radial direction, in response to compression forces and / or in response to fluid pressure inside the filter chamber. Preferably, both sides of the center plate 120 have key recesses 122 (shown in Figures 15-17 and 19) that are adapted to engage the corresponding keys on the first and second filter plates 130. In this manner, both the The first and second filter plates 130 are keyed to the center plate 120. The recess 122 for the key may be a hole or other structure that is configured to receive a structure in the filter plate 130. Alternatively, the center plate 120 may have keys or projections on each side, which are configured to be received within the key recesses of filter plates 130. In other embodiments, filter plates 130 and center plate 120 may have ribs or grooves that are configured to engage with each other to prevent relative movement between them. The keyed structures may be arranged in suitable locations around the perimeter of the center plate 120. Expansion is usually less of a problem with recessed cavity filter plates; however, if desired, keys or other interlocking structures could be used in such filter plate assemblies.
    [0115] As shown, for example, in Figures 12, 14, 15 and 17, in some configurations, each center plate or each movable plate 120 is provided with a washing apparatus 300 or with components of a washing apparatus 300. The Washing apparatus 300 is connected to a source of washing fluid 400 that supplies water or other washing fluid. The washing apparatus 300 comprises a first spray assembly or spray nozzle 310, a second spray assembly or spray nozzle 320, a pair of fluid hoses 340 (shown in Figures 5 and 9), and a connecting tube. 330 between each fluid hose 340 and each spray assembly or spray nozzle 310, 320. Alternatively, instead of providing a connecting tube 330, each fluid hose 340 can be directly connected to the spray assembly 310, 320 respective. Each spray assembly 310, 320 is located outside each of the first filter plate 130, the second filter plate 130, and the center plate or movable plate 120. A connection is provided between the spray assemblies 310, 320 and the center plate or movable plate 120, to secure the spray assemblies 310, 320 to the center plate or movable plate 120. Preferably, the first spray assembly 310 is configured to wash or clean one side of the center plate or plate movable 120 and / or one of the first and second filter plates 130, and the second spray assembly 320 is configured to wash or clean the other side of the central plate or the movable plate 120 and / or the other filter plate 130. As shown in Figures 16 and 17, the spray assemblies 310, 320 move down with the center plate or movable plate 120, such that the spray assemblies 310, 320 wash or clean the first and second custom filter plates 130 that the center plate or movable plate 120 moves down (or up) relative to the first and second filter plates 130. However, in other embodiments, the spray assemblies 310, 320 may be configured to wash or cleaning the first and second filter plates 130 and the center plate or movable plate 120 from a stationary position with respect to the first and second filter plates 130. The transport of the spray nozzles and / or other portions of the apparatus Washing on a filter plate defining a portion of a filter chamber allows fully or partially automatic washing at a lower cost than existing systems, because less is required additional structure. That is, existing systems are fitted with spray nozzles on a support structure that is completely separate from the filter plates, resulting in a higher total cost than the arrangement shown. In other configurations, the filter press 10 may not include a washing apparatus and the filter plates may be manually cleaned, or cleaned using a separate cleaning device (eg, a pressure spray washer).
    [0117] Spray assemblies 310, 320 can be configured to discharge high pressure (low volume) wash fluid. Since the filter plate assembly 100 may comprise a large number of center plates 120, and thus a large number of spray assemblies 310, 320, configure the spray assemblies 310, 320 to discharge wash fluid at high Pressure normally requires a high quality fluid pump, capable of maintaining high pressure in all spray assemblies 310, 320, which are connected in parallel. When the use of such a pump is cost prohibitive, or when the use of such a pump is technically impractical or difficult, the spray assemblies 310, 320 can also be configured to discharge flushing fluid at a relatively low pressure (and a high volume). ), for example, approximately 6.89 x 105 N / m2 (100 psi) (and approximately 3.15 x 10-2 m3 / s (500 GPM). The pump required for such an arrangement has a lower cost than a high pressure, allowing the overall package to be less costly. Applicant unexpectedly discovered that a High Volume Low Pressure (HVLP) scrubber arrangement effectively cleans filter plates. other pressures and volumes possible. It is also possible to configure the spray assemblies 310, 320 such that the spray assemblies 310, 320 only for a subset of center plates 120 (for example, approximately one-third of the s spray assemblies 310, 320) discharge flushing fluid at a specified time. By configuring the spray assemblies 310, 320 such that only a subset of the spray assemblies 310, 320 discharges flushing fluid at any given time, it is possible to maintain a high water pressure with a lower quality fluid pump (or lower pressure).
    [0119] Although multiple force generators 510 (one for each center plate 120) are shown, in other arrangements a single force generator may be provided that is coupled (or can be coupled) to multiple center plates 120, such as a subassembly or to the all of the center plates 120. Furthermore, although the center plates 120 are shown moving in a vertical direction and below the first and second second filter plates 130, other arrangements are also possible. For example, the center plates 120 may be configured to move upward, to either lateral side, in oblique directions relative to the first and second filter plates 130, in an oscillating or rotating motion, or in any other offset motion of the operating axis.
    [0121] Another embodiment is shown in Figures 20 to 22. Included in this embodiment may be components, features, and advantages of other embodiments, which are not otherwise described or shown in Figures 20 to 22. In addition, components, features, and advantages of this embodiment may be included in other embodiments.
    [0123] In the embodiment of Figures 20 to 22, a set of filter plates 100 for a filter press 10 comprises a first filter plate or movable plate 140 having a cavity 144 with a recess and the corresponding filter plate, or second plate filter plate 150. The surface of filter plate 150 facing moving plate 140 cooperates with moving plate 140 to form a filter chamber comprising recessed cavity 144. In some embodiments, the surfaces of filter plate 150 facing the filter chamber and delimiting the filter chamber opening in the closed position are flat or generally flat, such that the entire thickness of the filter chamber is defined by the recessed cavity 144 of the plate 140 mobile. For example, the thickness of the filter chamber may be defined by the depth of the recessed cavity 144. In other embodiments, the surface of filter plate 150 facing movable plate 140 may include a recessed cavity 154 (not shown) that cooperates with recessed cavity 144 of movable plate 140 to form a filter chamber. In such an embodiment, the thickness of the filter chamber is defined (at least in part) by the recessed cavities 144, 154. For example, the thickness of the filter chamber may be defined by the combined depth of the recessed cavities 144, 154.
    [0125] Movable plate 140 and filter plate 150 can be keyed together. For example, the side of movable plate 140 facing filter plate 150 may have key recesses 142 (shown in Figures 20 and 22) that are adapted to mate with corresponding keys in filter plate 150. The recess For keys 142 may be a hole or other structure that is configured to receive a frame in filter plate 150. Alternatively, movable plate 140 may have keys or projections that are configured to be housed within the recesses for filter plate keys 150. In other embodiments, filter plate 150 and movable plate 140 may have ribs or grooves that are configured to engage with each other to prevent relative movement between them. The keyed structures may be arranged in suitable locations around the perimeter of the movable plate 140.
    [0127] As shown in Figures 21 and 22, movable plate 140 preferably moves or slides within a pair of vertical rails 18. Vertical rails 18 allow movable plate 140 to move between an aligned position (shown in Figure 21) and a spaced position (shown in Figure 22) with respect to the filter plate 150. The filter plate assembly 100 may include any number of movable plates 140 and corresponding or second filter plates 150 for be used with a filter press 10. In some configurations, as shown in Figure 21, each movable plate 140 is provided with a washing apparatus 300 or with components of a washing apparatus 300. The washing apparatus 300 may have the following: Same components and features as described above in connection with the embodiments of Figures 1 to 19, and shown by way of example in Figures 12, 14, 15 and 17.
    [0129] Figures 23 through 25 show a filter press 10 incorporating a plurality of filter plate assemblies 100, omitting the force generator 510 for each of the movable filter plates 120. In some configurations, the number of force generators 510 is less than the number of moving filter plates 120. In some configurations, a force generator 510 may be provided at each end of the stack of filter plate assemblies 100.
    [0131] Force generator 510 or force generators 510 may act on movable filter plates 120 through a force transfer element or mechanism, such as a beam (eg, I-beam 600). In some configurations, the force transfer element may be a connecting element or a connecting mechanism, which joins two or more of the movable filter plates 120. The term "connection", as used herein, means that the connection element acts on two or more movable filter plates 120, which may include simply contacting the movable filter plates 120, or the element The connector may be connected to two or more of the movable filter plates 120. The connecting element 600 can engage more than one of the movable filter plates 120 to selectively displace the movable filter plates 120. One or more force generators 510 can be configured to move the connecting element.
    [0132] Movable filter plates 120 may be supported by rails 18 in a manner similar to the embodiments described above. However, in other configurations, the movable filter plates 120 may be otherwise supported. For example, the movable filter plates 120 may be retained in whole, or in part, by means of the side rails 12 of the filter press 10.
    [0134] In some configurations, a portion or all of the filter press 10 may be positioned on a scale or load cell arrangement such that the weight of the filter plate assembly (alone or in combination with other components of the filter press ) can be determined. Such an arrangement can allow a tare weight to be established, which can then allow comparisons to the weights at different points in the filtering process, including the unloading and cleaning steps. Such an arrangement may allow or facilitate a fully autonomous filter press, by allowing the system to monitor the filling of the filter chambers with filter cake and confirm complete discharge of filter cake, and / or determine if cleaning is required. additional. For example, an impediment to stand-alone filter presses is the concern over incomplete filter cake removal between filter cycles. A cake residue at the beginning of a filter cycle can result in a pressure difference between the part of the filter chamber that has the cake residue and the adjacent portions of the filter chamber. This differential can result in unwanted stress on the filter plates which, over time, can weaken and possibly result in filter plate failure. As a result, many users opt for manual cleaning or, at a minimum, manual inspection of the filter plates between cycles, to avoid cake residue. However, such manual cleaning or inspection is time consuming (and therefore expensive) and difficult.
    [0136] Although the present invention has been described in terms of certain embodiments, other embodiments apparent to those skilled in the art are also within the scope of this invention. Therefore, various changes and modifications can be made without departing from the spirit and scope of the invention. For example, various components can be repositioned as desired. Furthermore, not all features, aspects, and advantages are necessarily required to practice the present invention. Accordingly, it is intended that the scope of the present invention be defined solely by the claims that follow.
    权利要求:
    Claims (22)
    [1]
    1. Set of filter plates, comprising:
    a first filter plate; Y
    a second filter plate;
    wherein the first filter plate and the second filter plate have a filter position in which the plates are aligned with each other along an operating axis and collaborate to define a filter chamber;
    wherein the first filter plate can be moved out of alignment with the second filter plate and away from the operating axis to a discharge position, where the filter cake can be discharged from a defined filter chamber portion at least one of the first filter plate and the second filter plate.
    [2]
    2. Set of filter plates, comprising:
    a first filter plate, having a first side surface comprising a first cavity; Y
    a second filter plate, having a second side surface comprising a second cavity;
    wherein the first filter plate and the second filter plate have a filter position in which the plates are aligned with each other along an operating axis and the first cavity and second cavity collaborate to define a chamber of filtered out;
    wherein at least one of the first filter plate and the second filter plate can be moved away from the operating axis and out of the filter position to a discharge position, in which the filter cake inside from one of the respective filter cavities and from the second filter cavity can be discharged.
    [3]
    A filter plate assembly according to claim 2, further comprising a force generator, configured to exert a force to keep the plate moving in the filter position or return the movable plate to the filter position.
    [4]
    4. Set of filter plates according to claim 3, in which the force generator is a pneumatic cylinder that uses a compressed gas as operating fluid, a hydraulic cylinder that uses a non-compressible fluid, an electric cylinder or a jack. screw.
    [5]
    Set of filter plates according to claim 2, in which, in the discharge position, a portion or all of the movable plate is located outside a space delimited by the lateral edges of the other of the first plate filter plate and the second filter plate.
    [6]
    A filter plate assembly according to claim 2, further comprising a first spray assembly attached to the movable plate at a location outside the cavity, the first spray assembly being connected to a source of a fluid from washed.
    [7]
    A filter plate assembly according to claim 6, wherein the first spray assembly is configured to direct a spray of washing fluid at least toward each other of the first and second filter plates and to one another. filter plate adjacent to an opposite side of the movable plate with respect to the other of the first and second filter plates.
    [8]
    A filter plate assembly according to claim 2, further comprising a second spray assembly attached to the movable plate, the second spray assembly being connected to a source of a washing fluid.
    [9]
    A filter plate assembly according to claim 8, wherein the second spray assembly is configured to direct a spray of a scrubbing fluid in a direction opposite the first spray assembly.
    [10]
    Set of filter plates according to claim 2, further comprising at least one support structure that movably supports the movable plate.
    [11]
    A filter plate assembly according to claim 10, wherein at least one support structure comprises a first side track and a second side track located on opposite sides of the movable plate.
    [12]
    12. Set of filter plates, comprising:
    a first filter plate, having a first side surface;
    a second filter plate, having a second side surface;
    a center plate, having an outer surface and an inner zone, said center plate being configured to be displaced between an aligned position and a separate position with respect to the first filter plate and the second filter plate,
    wherein, in said alignment position, the center plate is held in place between the first side surface and the second side surface, and
    wherein, in said separated position, the first filter plate and the second filter plate are spaced a certain distance from the center plate, said distance allowing the center plate to descend or move toward or to the separated position, then from which the particle cake is discharged from the inner zone of the central plate.
    [13]
    A filter plate assembly according to claim 12, further comprising a force generator configured to exert a force to hold the center plate in place between the first side surface and the second side surface in said position of alignment, or to return the center plate to the aligned position.
    [14]
    Set of filter plates according to claim 13, in which the force generator is a pneumatic cylinder that uses a compressed gas as the operating fluid, a hydraulic cylinder that uses a non-compressible fluid, an electric cylinder or a pressure jack. screw.
    [15]
    15. Set of filter plates according to claim 14, in which said separation position is achieved when the compressed gas is released from the pneumatic cylinder.
    [16]
    A filter plate assembly according to claim 12, wherein, in the detached position, a portion or all of the central plate is located below a first lower surface of the first filter plate and the second bottom surface of second filter plate.
    [17]
    A filter plate assembly according to claim 12, further comprising a first spray assembly, attached to the outer surface of the central plate, said first spray assembly being connected to a source of a washing fluid.
    [18]
    18. A filter plate assembly according to claim 17, wherein the first spray assembly is configured to direct a spray of a washing fluid toward at least one of said first side surface and said second side surface.
    [19]
    19. Filter plate assembly according to claim 12, further comprising a second spray assembly, attached to the outer surface of the center plate, said second spray assembly being connected to a source of washing fluid.
    [20]
    A filter plate assembly according to claim 19, wherein the second spray assembly is configured to direct a spray of a washing fluid towards at least one of said first side surface and said second side surface.
    [21]
    21. Set of filter plates according to claim 12, further comprising at least one support structure, which movably supports the central plate.
    [22]
    22. A filter plate assembly according to claim 21, wherein, at a minimum, the support structure comprises a first side track and a second side track located on opposite sides of the center plate.
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    同族专利:
    公开号 | 公开日
    DE212019000252U1|2020-11-20|
    CN210145572U|2020-03-17|
    GB202017619D0|2020-12-23|
    GB2587947A|2021-04-14|
    BR112020020880A2|2021-01-26|
    US11229863B2|2022-01-25|
    JP2021521007A|2021-08-26|
    US20190314742A1|2019-10-17|
    WO2019200036A1|2019-10-17|
    DE112019001926T5|2021-01-07|
    PE20210245A1|2021-02-09|
    CN110354548A|2019-10-22|
    ZA202006941B|2021-09-29|
    AU2019252265A1|2020-11-26|
    CA3095750A1|2019-10-17|
    ES2803959R1|2021-02-24|
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    法律状态:
    2021-02-01| BA2A| Patent application published|Ref document number: 2803959 Country of ref document: ES Kind code of ref document: A2 Effective date: 20210201 |
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    优先权:
    申请号 | 申请日 | 专利标题
    US201862656228P| true| 2018-04-11|2018-04-11|
    PCT/US2019/026894|WO2019200036A1|2018-04-11|2019-04-11|Discharge filter plate assembly for filter press|
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