Grate and cylinder for filtrate cylinder assembly of a vertical filter press

Abstract

A grid (1) and a cylinder (4) for a cylinder assembly of a vertical filter press, such as a tower press, are disclosed. The grid (1) is provided with a topography pattern (3) that engages a corresponding inverted topography pattern (8) on the filtrate cylinder (4). The topography patterns (3, 8) direct the flow of filtrate towards the filtrate outlet (7) and reduce the formation of vortices and turbulence of the filtrate, thereby increasing the flow rate of the filtrate through the cylinder. At the same time, the topography patterns (3, 8) improve the secure attachment of the grid (1) on the cylinder (4), thereby allowing an increase in the travel speed of the filter medium during its advancement. As a result, the cycle time of the filtration process can be reduced, and therefore, the overall capacity of the associated filter press is increased. A filtrate cylinder assembly and a vertical filter press are also disclosed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to vertical filter presses, such as a filter press, and more particularly to a grid and vat for a filtrate cylinder assembly of such a filter press. The present disclosure also relates to a cylinder assembly and a vertical filter press. BACKGROUND

[0002] In a vertical filter press, a plurality of filter plates are stacked, thereby defining filter chambers between adjacent filter plates. A filter medium, typically a filter cloth, is positioned between adjacent filter plates. Slurry is fed into the filter chambers above the filter cloth, and filtrate is received through the filter medium into a filtrate cylinder formed on the lower filter plate. A grid is provided in the filtrate cylinder in order to support the filter cloth and prevent the filter cloth from bulging into the filtrate cylinder. In order to remove the solid filter cake formed in the filter chamber, the filter plates are moved away from each other and the filter medium is advanced, thereby bringing the filter cake out of the filter chamber.

[0003] Typically, the slurry is introduced into the filter chamber at one or more different points, resulting in an uneven flow of filtrate into the filtrate cylinder. In particular, the majority of the filtrate is received at the feed area of the filtrate cylinder, which corresponds to the location of the point(s) at which the slurry is introduced into the filter chamber. As a result, the flow of filtrate within the filtrate cylinder typically forms a vortex, resulting in turbulent flow, which in turn reduces the flow rate at which the filtrate can flow into and out of the cylinder.

[0004] Furthermore, as the weight of the filter medium and filter cake presses on the grid, the grid must be sufficiently secured in place in order to withstand the forces exerted on it by the filter medium dragging the grid as it advances. If the grid is not properly secured, it can become misaligned or misaligned, thereby increasing the risk of damaging the filter medium itself. Due to this, in part, the speed at which the filter medium is advanced during filter discharge is limited. SUMMARY

[0005] It is an object of the present disclosure to provide a grid and vat for a cylinder assembly of a vertical filter press, such as a filter press, which facilitates increasing the overall capacity of the associated filter press. It is a further object of the present disclosure to provide a filtrate cylinder assembly comprising such a grid and filtrate vat, and a vertical filter press comprising such a filtrate cylinder assembly.

[0006] The objects of the present disclosure are achieved by a grid, a filtrate vat, a filtrate cylinder assembly, and a vertical filter press.

[0007] The present disclosure is based on the idea of providing a surface of the grid facing the filtrate vat with a topography pattern that engages with a corresponding, inverted topography pattern on a surface of the filtrate vat facing the grid, such that the topography patterns direct the flow of filtrate towards the filtrate outlet of the filtrate vat.

[0008] An advantage of the solution according to the present disclosure is that the topographic patterns reduce the formation of vortices and turbulence of the filtrate in the filtrate cylinder, thus increasing the filtrate flow rate through the cylinder. At the same time, these topographic patterns improve the secure attachment of the grid on the cylinder, allowing to increase the travel speed of the filter medium during its advancement. As a result, the cycle time of the filtration process can be reduced, thus, the overall capacity of the associated filter press is increased.

[0009] According to a first aspect of the present disclosure, there is provided a grid for a filtrate cylinder assembly of a vertical filter press, such as a column filter press.

[0010] The grid comprises a plate-like grid body having a first face and a second face. The first face defines a substantially planar first surface for supporting a filter cloth when in use. The second face defines a second surface comprising a plurality of protruding knobs spaced apart from each other for supporting the remaining grid on an associated filtrate cylinder at a distance therefrom. That is, the knobs are configured for supporting the remaining grid at a distance from the bottom of the container defined by the cylinder, so as to enable the flow of filtrate between the grid and the cylinder. The first and second faces are arranged on opposite sides of the plate-like grid body. The body further comprises a plurality of holes providing fluid communication between the first and second surfaces.

[0011] Furthermore, the second surface comprises a grid topography for engaging with a corresponding, inverted cylinder topography of the associated filtrate cylinder. That is, the protrusions of the grid topography are adapted to be received by the recesses of the cylinder topography, or vice versa, so as to secure the grid laterally to the cylinder. The grid topography forms a topographic pattern at the location of the grid extending along the intended filtrate flow path of the associated filtrate cylinder.

[0012] In the context of the present disclosure, the term topography is used to describe the relief of a surface, i.e. the forms and shapes formed by the height differences of the surface.

[0013] The topographic patterns reduce the formation of vortices in the filtrate cylinder, which makes the filtrate flow there less turbulent. As a result, the filtrate is discharged from the filtrate cylinder faster. Furthermore, the topographic patterns facilitate the securement of the grid in place within the filtrate cylinder. Thus, the grid is better able to resist the movements induced by the filter medium advancing thereon. As a result, the speed of the filter medium advancement can be increased. Since the filtrate discharge is improved and the filter medium can advance faster, the time required for the filtration step and the filter cake discharge step, respectively, is reduced, and the overall efficiency of the associated filter press is improved. In other words, the solution according to the present disclosure allows more slurry to be filtered in a given time.

[0014] In embodiments according to the first aspect of the disclosure, the grid topography can comprise a plurality of recesses for receiving a corresponding cylinder topography of the associated filtrate cylinder comprising a plurality of protrusions. In this case, the plurality of recesses form a pattern of depressions at the location of the grid extending along the intended filtrate flow path of the associated filtrate cylinder. For example, the pattern of depressed topography grid can be provided as one or more grooves extending suitably along the intended flow path.

[0015] Such an arrangement is considered particularly advantageous as providing a pattern of depressions in the cylinder can result in solids depositing in such recesses over time, thereby preventing the protrusion grid pattern from being suitably received within the recesses.

[0016] In embodiments according to the first aspect of the disclosure, the grid topography can comprise a plurality of protrusions for being received by a corresponding cylinder topography of the associated filtrate cylinder comprising a plurality of recesses. In this case, the plurality of protrusions form a pattern of protrusions at the location of the grid extending along the intended filtrate flow path of the associated filtrate cylinder. For example, the pattern of protruded topography grid can be provided as one or more beads extending suitably along the intended flow path.

[0017] In embodiments according to the first aspect of the disclosure, the grid body can have a generally rectangular shape having a first set of opposing parallel lateral sides and a second set of opposing parallel lateral sides, such that the first set of sides is perpendicular with respect to the second set of sides.

[0018] Such a generally rectangular grid facilitates laying of a plurality of grids in order to cover an entire area of a filtrate cylinder. For example, a combination of grids having two or more different topography patterns can be used to conform to complex intended flow routes. However, it should be noted that grids can also be provided in other alternative shapes.

[0019] For example, the grid topography pattern can preferably extend between opposing sides of the grid along a linear path.

[0020] Alternatively, the grid topography pattern can preferably extend between adjacent sides of the grid along a curved path. In particular, such an arrangement results in the grid topography pattern having a component extending transverse to the direction in which the filter medium advances during cake discharge, regardless of the orientation of the grid on the filtrate cylinder.

[0021] It should be noted that the first aspect of the disclosure encompasses any combination of two or more embodiments or variations thereof as discussed above.

[0022] According to a second aspect of the disclosure, there is provided a filtrate cylinder for a filtrate cylinder assembly of a vertical filter press, such as a column filter press.

[0023] The filtrate cylinder has a cylinder body comprising a plate side with a bottom surface at which the filtrate cylinder can be supported on a filter plate. The cylinder body further comprises a grid side opposite the plate side.

[0024] A cylinder surface is arranged on the grid side, the cylinder surface defining a bottom of a container for receiving filtrate obtainable from a filtration process of an associated vertical pressure filter and for receiving an associated grid to be supported thereon. Further, a border is arranged on the grid side at least partially surrounding the cylinder surface, the border defining a sidewall of the container.

[0025] The filtrate cylinder further comprises a filtrate outlet opening through the border for providing a discharge path for filtrate from the filtrate cylinder.

[0026] Further, the cylinder surface comprises a cylinder topography for engaging with a corresponding, inverted grid topography of the associated grid in a manner similar to that discussed in connection with the grid according to the first aspect of the present disclosure. The cylinder topography forms a topography pattern extending along the intended filtrate flow path between a feed area of the cylinder surface and the filtrate outlet opening.

[0027] In the context of the present disclosure, the term feed area is used to describe an area on the cylinder surface at which an increased flow rate of filtrate into the cylinder is exhibited. In practice, this area typically corresponds to the location of a slurry feed opening of an associated filter chamber when in use, which is located above the filtrate cylinder. Typically, such a feed area is arranged on a central region of the cylinder surface. For example, the feed area can be considered to extend from the geometric center of the cylinder surface in a longitudinal direction towards each longitudinal end by a distance corresponding to ¼ of the longitudinal length of the cylinder surface. Further, the feed area can be considered to extend in a transverse direction all the way to each transverse end. Alternatively, the feed area can be considered to extend from the geometric center of the cylinder surface in a transverse direction towards each transverse end by a distance corresponding to ¼ of the transverse length of the cylinder surface as well.

[0028] As with the grid according to the first aspect of the present disclosure, the topography pattern reduces the formation of eddies or vortices in the filtrate cylinder, which makes the filtrate flow there less turbulent. As a result, the filtrate is discharged from the filtrate cylinder faster. Further, the topography pattern facilitates the securement of the grid in place within the filtrate cylinder. As a result, the grid is better able to resist movements caused by the filter medium advancing thereon. As a result, the speed at which the filter medium advances can be increased. Since the discharge of filtrate is improved and the filter medium can advance faster, the time required for the filtration step and the filter cake discharge step, respectively, is reduced, and the overall efficiency of the associated pressure filter is improved. In other words, the solution according to the present disclosure makes more slurry available to be filtered in a given time.

[0029] In embodiments according to the second aspect of the disclosure, the cylinder topography comprises a plurality of protrusions for being received by a corresponding grid topography comprising a plurality of recesses. In this case, the plurality of protrusions forms a protrusion pattern extending along the intended filtrate flow path. For example, the protrusion cylinder topography pattern can be arranged as one or more beads suitably extending along the intended flow path.

[0030] In embodiments according to the second aspect of the disclosure, the cylinder topography comprises a plurality of recesses for receiving a corresponding grid topography comprising a plurality of protrusions. The plurality of recesses forms a recess pattern extending along the intended filtrate flow path. For example, the recessed topography cylinder pattern can be arranged as one or more grooves suitably extending along the intended flow path.

[0031] In embodiments according to the second aspect of the disclosure, the cylinder body is of a generally rectangular shape having opposite parallel flank sides extending along a longitudinal direction of the cylinder and opposite parallel end sides, such that the flank sides are perpendicular to the end sides. That is, the length of the flank sides is longer than the length of the end sides.

[0032] In this case, the filtrate outlet is arranged at a corner region between an adjacent flank side and end side. Furthermore, the topography pattern suitably extends parallel to the flank sides between the feed region and the filtrate outlet.

[0033] In embodiments according to the second aspect of the disclosure, the cylinder topography pattern extends oblique to the flank sides at the corner region having the outlet.

[0034] In embodiments according to the second aspect of the disclosure, the cylinder topography pattern extends oblique to the flank sides at the corner region having the outlet.

[0035] In embodiments according to the second aspect of the disclosure, the cylinder is arranged as a cylinder liner having a material thickness of less than 15 mm. That is, the main structural rigidity of the cylinder and the container formed thereby is formed by a separate entity independent of the cylinder liner, such as the filter plate itself, while the cylinder liner merely lines or covers the shape of the cylinder, thereby separating it from contact with the filtrate and / or other process fluids. In particular in this case, it is advantageous to arrange the cylinder topography as a plurality of protrusions, as the material strength will limit the depth of the recesses.

[0036] It should be noted that the second aspect of the disclosure encompasses any combination of two or more embodiments or variations thereof as discussed above.

[0037] According to a third aspect of the disclosure, there is provided a filtrate cylinder assembly for a vertical filter press, such as a column filter press.

[0038] The filtrate cylinder assembly comprises a grid according to the first aspect of the disclosure as discussed above and a filtrate cylinder according to the second aspect of the disclosure as discussed above.

[0039] In particular, the grid is received within the vessel of the cylinder such that the second surface of the grid faces and is supported by the cylinder surface of the filtrate cylinder and such that the grid is laterally bounded by the border. Furthermore, the grid is positioned and aligned such that the grid topography and the cylinder topography mutually engage each other.

[0040] According to embodiments of the third aspect of the disclosure, the filtrate cylinder is of a substantially rectangular shape having a filtrate outlet at a corner region and a topography pattern extending parallel to the side between the feed region and the filtrate outlet as discussed in more detail in connection with the second aspect of the disclosure. In this case, at least a grid of the type having a grid topography pattern extending between its opposite side faces as discussed in more detail in connection with the first aspect of the disclosure can be provided between the feed region and the filtrate outlet.

[0041] According to embodiments of the third aspect of the disclosure, the filtrate cylinder is of a type having a topography pattern extending oblique to the side at the feed region of the cylinder surface. In this case, at least a grid of the type having a grid topography pattern extending between its adjacent side faces as discussed in more detail in connection with the first aspect of the disclosure can be provided at the feed region.

[0042] According to embodiments of the third aspect of the disclosure, the filtrate cylinder is of a type having a topography pattern extending oblique to the side at the corner region having the outlet. In this case, at least a grid of the type having a grid topography pattern extending between its adjacent side faces as discussed in more detail in connection with the first aspect of the disclosure can be provided at the corner region having the outlet.

[0043] It should be noted that the third aspect of the disclosure encompasses any combination of two or more embodiments or variations thereof as discussed above.

[0044] According to a fourth aspect of the disclosure, a vertical filter press, such as a column filter press, is provided.

[0045] The filter press comprises:

[0046] a plurality of stacked filter plates configured to be movable in a vertical direction away from each other to an open position and towards each other to a closed position such that in the closed position a horizontal filter chamber is formed between adjacent filter plate assemblies;

[0047] a filter medium arranged between adjacent filter plates;

[0048] a lifting device for lifting the filter plate assemblies away from each other and lowering the filter plate assemblies towards each other;

[0049] a sealing device for pressing the plurality of filter plate assemblies against each other in the closed position so as to seal the filter chambers formed between the plurality of filter plate assemblies;

[0050] an arrangement for feeding slurry into the filter chambers;

[0051] a recovery device for recovering filtrate from the filtrate outlet, and

[0052] a discharge device for moving filter medium so as to discharge the filter cake formed within the filter chambers.

[0053] Further, the filtrate cylinder assembly according to the third aspect of the disclosure is provided on and supported by one or more filter plates. Further, the filter medium interposed between the upper filter plate and the lower filter plate is located on the grid of the filtrate cylinder assembly supported by the lower filter plate. During operation, the filtrate cylinder assembly of the lower filter plate is configured to receive filtrate from the associated filter chamber that has passed through the filter medium. BRIEF DESCRIPTION OF DRAWINGS

[0054] In the following, the disclosure will be described in more detail by preferred embodiments with reference to the accompanying drawings, in which:

[0055] Figure 1 a perspective view of a part of a filtrate cylinder assembly according to an embodiment of the disclosure is shown;

[0056] Figure 2 a plan view of the arrangement of Figure 1 is shown with additional markings showing the grid positions;

[0057] Figure 3 a plan view of the arrangement of Figure 1 is shown with additional markings showing the grid positions;

[0058] Figures 4a-4c various grids according to different embodiments of the disclosure are shown as plan views.

[0059] LIST OF REFERENCE NUMBERS

[0060] 1 grid

[0061] 1a first face

[0062] 1c, 1d first set of parallel sides

[0063] 1e, 1f second set of parallel sides

[0064] 2 plurality of holes

[0065] 3. Grid pattern

[0066] 4 filtrate tank

[0067] 4b grille side

[0068] 4c, 4d side

[0069] 4e, 4f side

[0070] 5-cylinder surface

[0071] 6 Boundaries

[0072] 7 Filtrate outlet opening

[0073] 8-cylinder morphology pattern

[0074] 9 Supply Area DETAILED DESCRIPTION

[0075] Figure 1 A perspective view of a portion of a filtrate cylinder assembly according to an embodiment of the present disclosure is shown. In particular, the cylinder assembly has a filtrate cylinder 4 in which three different types of grilles 1 are received. It should be noted that in the operating state, the grill side (i.e., bottom surface) 4b of the cylinder 4 is covered by a plurality of additional grilles, which are not shown for clarity purposes. Figures 1-3 The plurality of additional grilles are not shown.

[0076] In particular, Figure 1 The cylinder 4 shown is formed as a cylinder liner, i.e. a body with a relatively thin material thickness, which is intended to cover a separate entity (such as a filter plate) which provides the main structural strength for the filtrate cylinder. Of course, the filtrate cylinder can alternatively be provided as a thicker self-supporting structure.

[0077] The filtrate cylinder 4 has a generally rectangular shape having a pair of parallel opposing side sides 4c and 4d, and a pair of parallel opposing end sides 4e and 4f, wherein the end sides 4e, 4f are transverse to (or perpendicular to) the side sides 4c, 4d.

[0078] The filtrate cylinder is supported on a filter plate at its plate side (not shown). A cylinder surface 5 is arranged on the opposite grid side 4b of the cylinder body, defining the bottom of the container formed by the filtrate cylinder 4. In particular, the container is configured to receive filtrate from the filtration process of an associated filter press (i.e., when in use, from a filter chamber formed above the filtrate cylinder). A boundary 6 extends along the sides 4c, 4d and the end sides 4e, 4f and surrounds the cylinder surface 5, thereby defining the side walls of the container. Filtrate openings 7 are arranged at the four corner regions of the filtrate cylinder 4, extending through the boundary 6 to provide a drainage path for the filtrate received in the container.

[0079] The cylinder surface 5 presents a topographical pattern formed as a plurality of protrusions arranged as beads extending along the intended flow path between a supply area (arranged at a central portion of the cylinder surface 5) and the outlet openings 7. In particular, the intended flow path extends between each outlet opening 7 and the supply area 9.

[0080] The cylinder topography pattern 8 is inclined relative to the sides 4c, 4d at the supply area 9 and extends along a curved path to direct the filtrate flow away from the lateral center of the cylinder surface 5. The cylinder topography pattern 8 then extends parallel to the sides 4c, 4d toward their respective outlet openings 7 to direct the filtrate flow toward the end sides 4e, 4f. Finally, at the corner area with the outlet opening 7, the cylinder topography pattern 8 then extends along a curved path, inclined relative to the sides 4c, 4d, to direct the filtrate flow into the outlet opening 7.

[0081] As mentioned above, Figure 1 Three different types of grids 1 are shown received in a container of a filtrate cylinder and supported on a cylinder surface 5. Each grid has a plate-like body having: a first face 1a having a flat surface on which the filter medium will be supported when in use; and a second face (not shown) facing the cylinder surface 5 where the grid 1 is supported on the filtrate cylinder. A plurality of holes 2 are provided (see Figures 4a-4c ) for providing fluid communication between the first surface 1a and the second surface. Although not shown in the drawings, the second surface has a plurality of protrusions for spacing the remaining grid 1 from the cylinder surface 5 a certain distance to allow filtrate to pass therebetween.

[0082] The second surface of each grid has a grid topography that is inverted relative to the cylinder topography of the cylinder surface 5 at the intended location of the grid 1 in question. That is, the grid topography forms a topographic pattern 3 that also extends along the intended filtrate flow path of the associated filtrate cylinder 4 at the location of the grid 1. Furthermore, the grid topography pattern 3 engages with the topography pattern 8 of the cylinder surface 5. In the arrangement shown in the figures, the raised cylinder topography pattern 8 is received by the recessed grid topography pattern 3.

[0083] Figure 2 Shown with Figure 1 The same arrangement is shown with dot-dashed auxiliary lines to indicate the intended position of additional grids not shown in the drawing.

[0084] and Figure 3 Shown in plan view Figure 1 The layout. Figure 4a The grid 1 positioned at the feed area 9 is shown in more detail in FIG. Figure 4c The grilles positioned at the corner areas with the outlet openings 7 are shown in more detail in FIG.Figure 4b The grid 1 is shown in more detail in between the supply area 9 and the outlet opening 7.

[0085] Figure 4a A plan view of the grid 1 is shown as seen from the first face la of the grid 1. The plurality of holes 2 extend through the first face la up to the opposite second face, thereby providing fluid communication between them. Although the grid topography pattern 3 is provided on the second face, the projection of the grid topography pattern on the first face la is still shown with dashed lines. In particular, the grid topography pattern 3 extends along a curved path between adjacent side faces Id, If. Figure 4a The grid is of a generally rectangular shape, having a first set of opposite parallel side faces lc, Id and a second set of opposite side faces le, If, such that the first set of side faces and the second set of side faces are perpendicular to each other.

[0086] Figure 4b A plan view of the grid 1 is shown similar to Figure 4a the grid 1 of Fig. 1, except that the grid topography pattern 3 extends along a linear path between opposite side faces lc, Id.

[0087] Figure 4c A plan view of the grid 1 is shown similar to Figure 4a the grid 1 of Fig. 1, except that the grid topography pattern 3 extends along a curved path between adjacent side faces lc, le. In addition, Figure 4c the grid 1 of Fig. 1 further has a bevelled face provided between side faces le and Id.

Claims

1. A grid for a filtrate cylinder assembly of a vertical filter press, the grid comprising a plate-like grid body having a first face (la) and an opposite second face, wherein the first face (la) defines a substantially planar first surface for supporting, when in use, a filter cloth, wherein the second face defines a second surface comprising a plurality of protruding lugs spaced apart from each other for supporting the grid (1) in a spaced apart manner on an associated filtrate cylinder (4), wherein the body further comprises a plurality of holes (2) providing fluid communication between the first surface and the second surface, characterized in that the second surface comprises a grid topography for engaging a corresponding, inverted cylinder topography of an associated filtrate cylinder (4), and wherein the grid topography forms at the location of the grid (1) a grid topography pattern (3) extending along an intended filtrate flow path of the associated filtrate cylinder (4), the grid topography pattern (3) reducing the formation of eddies or vortices in the filtrate cylinder (4).

2. The grid according to claim 1, characterized in that the grid topography comprises a plurality of recesses for receiving a corresponding cylinder topography of an associated filtrate cylinder (4) comprising a plurality of protrusions, and wherein the plurality of recesses forms at the location of the grid a recess pattern extending along an intended filtrate flow path of the associated filtrate cylinder (4).

3. The grid of claim 1, wherein, the grid topography comprises a plurality of protrusions for being received by a corresponding cylinder topography of an associated filtrate cylinder (4) comprising a plurality of recesses, and wherein the plurality of protrusions forms at the location of the grid a protrusion pattern extending along an intended filtrate flow path of the associated filtrate cylinder (4).

4. The grid according to any of the preceding claims 1 to 3, characterized in that the grid body has a substantially rectangular shape having a first set of parallel opposite sides (lc, Id) and a second set of opposite parallel sides (le, If) such that the first set of sides (lc, Id) is perpendicular with respect to the second set of sides (le, If).

5. The grid according to any of the preceding claims 1 to 3, characterized in that, the grid topography pattern (3) extends between opposite sides (lc, Id; le, If) of the grid.

6. The grid of claim 5, wherein, the grid topography pattern (3) extends along a linear path.

7. The grating according to any of the preceding claims 1 to 3, characterized in that the grid topography pattern (3) extends between adjacent sides (lc, le; Id, If) of the grid.

8. The grid according to claim 7, characterized in that the grid topography pattern (3) extends along a curved path.

9. The grating according to any of the preceding claims 1 to 3, characterized in that the vertical filter press is a tower press.

10. A filtrate cylinder for a filtrate cylinder assembly of a vertical filter press, the filtrate cylinder having a cylinder body comprising: a plate side having a bottom surface at which the filtrate cylinder (4) can be supported on a filter plate, and a grid side (4b) opposite the plate side, on which grid side is arranged: a cylinder surface (5) defining a bottom of a container for receiving filtrate obtainable from a filtration process of an associated vertical filter press and for receiving an associated grid (1) to be supported thereon, the grid (1) being a grid according to any one of the preceding claims 1 to 9, and a grid side (4b) opposite the plate side, on which grid side is arranged: a border (6) at least partially surrounding the cylinder surface, the border (6) defining a side wall of the container, wherein the filtrate cylinder (4) comprises a filtrate outlet opening (7) for providing a discharge path for filtrate from the filtrate cylinder through the border (6), characterized in that the cylinder surface (5) comprises a cylinder topography for engaging with a corresponding, inverted grid topography of an associated grid (1), and wherein the cylinder topography forms a cylinder topography pattern (8) extending along the intended filtrate flow path between a feed area (9) of the cylinder surface and the filtrate outlet opening, the cylinder topography pattern (8) reducing the formation of eddies or vortices in the filtrate cylinder (4).

11. The filtrate cylinder of claim 10, wherein, the cylinder topography comprises a plurality of protrusions for being received by a corresponding grid topography of an associated grid (1) comprising a plurality of recesses, and wherein the plurality of protrusions forms a protrusion pattern extending along the intended filtrate flow path.

12. The filtrate cylinder of claim 10, wherein, the cylinder topography comprises a plurality of recesses for receiving a corresponding grid topography of an associated grid (1) comprising a plurality of protrusions, and wherein the plurality of recesses forms a recess pattern extending along the intended filtrate flow path.

13. The filtrate cylinder according to any of the preceding claims 10 to 12, characterized in that the cylinder body has a generally rectangular shape with opposite parallel side sides (4c, 4d) extending along a longitudinal direction of the filtrate cylinder and opposite parallel end sides (4e, 4f), such that the side sides (4c, 4d) are perpendicular to the end sides (4e, 4f), wherein the filtrate outlet opening (7) is provided at a corner region between an adjacent side side (4c, 4d) and an end side (4e, 4f), and wherein the cylinder topography pattern (8) extends parallel to the side sides (4c, 4d) between the feed area (9) and the filtrate outlet opening (7).

14. The filtrate cylinder of claim 13, wherein, the cylinder topography pattern (8) extends oblique to the side sides (4c, 4d) at the feed area of the cylinder surface (5).

15. The filtrate cylinder of claim 13, wherein, the cylinder topography pattern (8) extends oblique to the side sides (4c, 4d) at the corner region with the filtrate outlet opening.

16. The filtrate cartridge according to any of the preceding claims 10 to 12, characterized in that the filtrate cylinder (4) is provided as a cylinder liner having a material thickness of less than 15 mm.

17. The filtrate cartridge according to any of the preceding claims 10 to 12, characterized in that the vertical filter press is a tower press.

18. A filtrate cylinder assembly for a vertical filter press, characterized by, the filtrate cylinder assembly comprises: a grid according to any one of the preceding claims 1 to 9, and a filtrate cylinder according to any one of the preceding claims 10 to 17, wherein the grid (1) is received within the container of the filtrate cylinder (4) such that a second surface of the grid faces and is supported by a cylinder surface (5) of the filtrate cylinder (4), and such that the grid (1) is laterally delimited by a border (6), and wherein the grid topography and the cylinder topography mutually engage with each other.

19. The filtrate cylinder assembly of claim 18, wherein, the filtrate cylinder (4) is according to claim 13, and wherein at least the grid according to claim 5 is provided between a feed area (9) and a filtrate outlet opening (7).

20. The filtrate cylinder assembly of claim 18 or 19, wherein, The filtrate cylinder (4) is according to claim 14, and wherein at least the grid (1) according to claim 7 is arranged at the feed area (9).

21. The filtrate cylinder assembly of claim 18 or 19, wherein, The filtrate cylinder is according to claim 15, and wherein at least the grid according to claim 7 is arranged at a corner area having a filtrate outlet opening (7).

22. A vertical filter press, comprising: a plurality of stacked filter plates, wherein the stacked filter plates are configured to be moved away from each other in a vertical direction to an open position and towards each other to a closed position, such that in the closed position a horizontal filter chamber is formed between adjacent filter plate assemblies; a filter medium arranged between adjacent filter plates; a lifting device for lifting the filter plate assemblies away from each other and lowering the filter plate assemblies towards each other; a sealing device for pressing the filter plate assemblies in the closed position against each other in order to seal the filter chamber formed between the filter plate assemblies; a feed device for feeding slurry into the filter chamber; a recovery device for recovering filtrate from a filtrate outlet opening, and a discharge device for moving the filter medium in order to discharge a filter cake formed within the filter chamber, characterized in that a filtrate cylinder assembly according to any one of the preceding claims 18 to 21 is arranged on and supported by one or more filter plates, wherein the filter medium between an upper filter plate and a lower filter plate is located on the grid (1) of the filtrate cylinder assembly supported by the lower filter plate, and wherein during operation the filtrate cylinder assembly of the lower filter plate is configured to receive filtrate from the associated filter chamber that has passed through the filter medium.

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