Lattice and tank of filtrate tank assembly of vertical filter press

Abstract

Disclosed is a grid (1) and a tank (4) for a tank assembly of a vertical filter press, such as a tower press. The grid (1) includes a topographical pattern (3) that mates with a corresponding inverted topographical pattern (8) on the filtrate tank (4). The topographical patterns (3, 8) direct filtrate flow toward the filtrate outlet (7), reducing swirls and turbulence in the filtrate and increasing the flow rate of filtrate through the tank. At the same time, the topographical patterns (3, 8) allow the grid (1) to be more securely attached to the tank (4), thereby increasing the movement speed of the filtration media during advancement. This results in shorter cycle times for the filtration process, thereby improving the overall capacity of the associated filter press. Also disclosed are a filtrate tank assembly and a vertical filter.

Description

Field of the Disclosure

[0001] The present disclosure relates to vertical filter presses, such as tower presses, and more particularly to the grids and tanks of the filtrate tank assemblies of such filters. The present disclosure further relates to tank assemblies and vertical filter presses. Background of the Disclosure

[0002] In a vertical filter press, a plurality of filter plates are stacked to define filter chambers between adjacent filter plates. A filter medium, typically a filter cloth, is disposed between adjacent filter plates. A slurry is poured above the filter cloth in the filter chamber, and the filtrate passes through the filter medium and flows into a filtrate tank formed in the lower filter plate. A grid is provided in the filtrate tank to support the filter cloth and prevent the filter cloth from expanding into the filtrate tank. To remove the solid filter cake formed in the filter chamber, the filter plates are separated from each other and the filter medium moves forward. Thereby, the filter cake is sent out from the filter chamber.

[0003] Normally, when the slurry is introduced into the filter chamber at one or more specific locations, an uneven filtrate flow occurs in the filtrate tank. Specifically, most of the filtrate is contained in the supply area of the filtrate tank, which corresponds to the position where the slurry is introduced into the filter chamber. Therefore, in many cases, the filtrate flow in the filtrate tank generates a vortex, resulting in turbulent flow, which reduces the flow rate of the filtrate flowing in and out of the tank.

[0004] Furthermore, since the weight of the filter medium and the filter cake acts on the grid, it is necessary to sufficiently fix the grid in place to resist the force acting on the grid by dragging the grid when the filter medium moves forward. If the grid is not properly fixed, the position of the grid may become inappropriate or shifted, and as a result, the risk of damage to the filter medium itself increases. For this reason, too, the forward speed of the filter medium during the discharge process in the filter is limited. Brief Description of the Disclosure

[0005] The present disclosure aims to provide a grid and a tank of a tank assembly of a vertical filter press such as a tower press, thereby improving the overall capacity of the associated filter press. Further, the present disclosure aims to provide a filtrate tank assembly incorporating such a grid and a filtrate tank, and a vertical filter press incorporating such a filtrate tank assembly.

[0006] The object of the present disclosure is achieved by a grid, a filtrate tank, a filtrate tank assembly, and a vertical filter press characterized by the matters described in the independent claims of the present application. Preferred embodiments of the present disclosure are specified in the dependent claims.

[0007] The present disclosure is based on the idea of providing a topographic pattern on the surface of the grid facing the filtrate tank, and the pattern fits into a corresponding inverted topographic pattern provided on the surface of the filtrate tank facing the grid. These topographic patterns guide the filtrate flow to the filtrate outlet of the filtrate tank.

[0008] The method according to the present disclosure has the advantage of reducing the generation of vortices and turbulent flows of the filtrate in the filtrate tank by the topographic pattern, thereby increasing the flow rate of the filtrate passing through the tank. At the same time, by more securely fixing the grid and the tank by the topographic pattern, the moving speed of the filter medium can be increased during its progress. As a result, the cycle time of the filtration process is reduced, thereby improving the overall capacity of the associated filter press.

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

[0010] This grid includes a plate-shaped grid body having a first face portion and a second face portion. The first face portion defines a substantially flat first surface that supports a filter cloth during use. The second face portion defines a second surface that includes a plurality of protruding tubercles provided at intervals from each other, and the plurality of tubercles support the grid located on the associated filtrate tank at a distance from the tank. That is, each tubercle is configured to support the placed grid away from the bottom of the container portion defined by the tank, thereby allowing the filtrate to flow between the grid and the tank. The first and second face portions are disposed on opposite surfaces of the plate-shaped grid body. The body portion further includes a plurality of holes that communicate fluid between the first surface and the second surface.

[0011] Also, the second surface includes a grid topography that fits into the corresponding inverted tank topography of the associated filtrate tank. That is, the grid is laterally fixed by the tank by the protrusions of the grid topography fitting into the depressions of the tank topography, or the protrusions of the tank topography fitting into the depressions of the grid topography. The grid topography forms a topographic pattern that extends along the intended filtrate flow path of the associated filtrate tank at the position of the grid.

[0012] In the present disclosure, the term topography is used when describing the undulations of a surface, that is, the mold and shape formed by the height difference on the surface.

[0013] The topographic pattern reduces the generation of vortices or swirls in the filtrate tank and reduces the turbulence of the filtrate flow at that location. As a result, the filtrate can be quickly discharged from the filtrate tank. Also, the topographic pattern helps to fix the grid in a predetermined position within the filtrate tank. Thereby, the grid becomes even more resistant to displacement caused by the filter medium advancing over it. As a result, the forward speed of the filter medium increases. When the discharge of the filtrate is improved and the filter medium can move faster, the time required for the filtration process and the discharge process of the filter cake are each shortened, and the overall efficiency of the associated filter is improved. In other words, with the method according to the present disclosure, more slurry can be filtered in a given time.

[0014] In an embodiment according to the first aspect of the present disclosure, the grid topography may include a plurality of depressions, and the plurality of depressions accommodate a corresponding tank topography of an associated filtrate tank that includes a plurality of protrusions. In such a case, the plurality of depressions form a concave pattern extending along the intended filtrate flow path of the associated filtrate tank at the position of the grid. For example, the concave topographic grid pattern may preferably be provided with one or more grooves extending along the intended flow path.

[0015] Such a configuration is considered to work particularly advantageously. This is because by providing a concave topographic pattern in the tank, over time, solids may accumulate in such depressions, preventing the protruding grid pattern shape from being properly accommodated within the depressions.

[0016] In an embodiment according to the first aspect of the present disclosure, the grid topography may include a plurality of protrusions, and the plurality of protrusions are accommodated in a corresponding tank topography of an associated filtrate tank that includes a plurality of depressions. In such a case, the plurality of protrusions form a convex pattern extending along the intended filtrate flow path of the associated filtrate tank at the position of the grid. For example, the convex topographic grid pattern may preferably be provided as one or more bead edges extending along the intended flow path.

[0017] In an embodiment according to the first aspect of the present disclosure, the lattice main body portion is substantially rectangular, has a first set of laterally opposed side faces and a second set of laterally opposed side faces, and the first set of side faces may be orthogonal to the second set of side faces.

[0018] With such a general rectangular lattice, it becomes easy to lay a plurality of lattices so as to cover the entire filtrate tank. For example, a combination of lattices having two or more different topographic patterns may be used to follow a composite intended flow path. However, it should be noted that the lattice can also be provided in another selectable shape.

[0019] For example, the lattice topographic pattern may extend between opposing side faces of the lattice, preferably along a linear path.

[0020] Alternatively, the lattice topographic pattern may extend between adjacent side faces of the lattice, preferably along a curved path. Specifically, with such a configuration, a lattice pattern is obtained that has a portion extending across the direction of travel of the filter medium during discharge of the filter cake, regardless of the orientation of the lattice placed on the filtrate tank.

[0021] It should be noted that the first aspect of the present disclosure includes any combination of two or more of the above-described embodiments, or modifications of the embodiments.

[0022] The second aspect of the present disclosure provides a filtrate tank for a filtrate tank assembly of a vertical filter press such as a tower press.

[0023] This filtrate tank has a tank main body portion, and the tank main body portion includes a flat plate surface having a bottom surface that enables the filtrate tank to be supported on a filter plate. The tank body further has a lattice surface facing the flat plate surface.

[0024] The tank surface is disposed on the grid surface, and the tank surface defines the bottom of a container portion that houses associated grids for containing filtrate obtained in the filtration process of an associated vertical filter press and supporting it on the tank surface. Further, by surrounding at least a portion of the tank surface, a boundary portion is disposed on the grid surface, and the side wall of the container portion is defined by the boundary portion.

[0025] This filtrate tank further includes a filtrate discharge opening that provides a discharge path for discharging the filtrate through the boundary portion from the filtrate tank.

[0026] Also, the tank surface has a tank topography, and the tank topography mates with the corresponding inverse grid topography of the associated grid in the same manner as described in relation to the grid according to the first aspect of the present disclosure. The tank topography forms a topographic pattern that extends along a desired filtrate flow path between the supply region of the tank surface and the filtrate discharge opening.

[0027] In the present disclosure, the term supply region is used when referring to a region on the tank surface where an increase in the flow rate of the filtrate flowing into the tank can be confirmed. In practice, such a region often corresponds to the position of the slurry supply port of an associated filter chamber located above the filtrate tank during use. Usually, such a supply region is arranged at the central portion of the tank surface. For example, it is recognized that the supply region may extend from the geometric center of the tank surface in the longitudinal direction by a distance corresponding to one-fourth of the longitudinal distance of the tank surface toward each longitudinal end. Further, it is recognized that the supply region may extend across the entire transverse direction up to each transverse end. Alternatively, it is recognized that the supply region may extend from the geometric center of the tank surface in the transverse direction by a distance corresponding to one-fourth of the transverse distance of the tank surface toward each transverse end.

[0028] Similar to the grid according to the first aspect of the present disclosure, the generation of vortices or swirls in the filtrate tank is reduced by the topographic pattern, whereby the turbulent flow of the filtrate in the tank is decreased. As a result, the discharge of the filtrate from the filtrate tank is accelerated. Also, the topographic pattern helps to fix the grid at a predetermined position within the filtrate tank. Thereby, the grid can more advantageously resist the movement that occurs when the filtration medium progresses over the grid. As a result, the moving speed of the filtration medium can be increased. When the discharge of the filtrate is improved and the moving speed of the filtration medium can be increased, the time required for the filtration process and the discharge process of the filter cake are respectively shortened, and the overall efficiency of the associated filter is improved. In other words, with the method according to the present disclosure, more slurry can be filtered within a predetermined time.

[0029] In an embodiment according to the second aspect of the present disclosure, the tank topography includes a plurality of protrusions, and the plurality of protrusions are received in the corresponding topography that the grid including a plurality of depressions has. In such a case, the plurality of protrusions form a convex pattern extending along the intended filtrate flow path. For example, the convex tank topographic pattern may preferably be provided as one or more bead edges extending along the intended flow path.

[0030] In an embodiment according to the second aspect of the present disclosure, the tank topography includes a plurality of depressions, and the plurality of depressions accommodate the corresponding grid topography including a plurality of protrusions. The plurality of depressions form a concave pattern extending along the intended filtrate flow path. For example, the concave topographic tank pattern may preferably be provided as one or more grooves extending along the intended flow path.

[0031] In an embodiment according to the second aspect of the present disclosure, the tank body portion is substantially rectangular, has parallel opposing side faces and parallel opposing end faces extending along the longitudinal direction of the tank, and the side faces are orthogonal to the end faces. The side faces are longer than the end faces.

[0032] In such a case, the filtrate discharge port is provided in a corner region between adjacent side surfaces and a tip surface. Further, the topographic pattern preferably extends parallel to the side surface from the supply region to the filtrate discharge port.

[0033] In an embodiment according to the second aspect of the present disclosure, the tank topographic pattern extends inclined toward the side surface in the supply region of the tank surface.

[0034] In an embodiment according to the second aspect of the present disclosure, the tank topographic pattern extends inclined toward the side surface in the corner region having the discharge port.

[0035] In an embodiment according to the second aspect of the present disclosure, the tank is provided as an inner lining of the tank with a material thickness of less than 15 mm. That is, while the main structural rigidity of the tank and the container part formed by the tank is obtained by an entity different from the inner lining of the tank (for example, the filter plate itself), the inner lining simply lines or covers the mold of the tank to isolate the tank so that it does not come into contact with the filtrate and / or other processing fluids. In particular, in such a case, since the depth of the depression may be limited due to the material strength, it is advantageous to provide the tank topography as a plurality of protrusions.

[0036] Note that the second aspect of the present disclosure includes any combination of two or more of the above-described embodiments, or a modified example of the embodiment.

[0037] The third aspect of the present disclosure provides a filtrate tank assembly of a vertical filter press such as a tower press.

[0038] This filtrate tank assembly has the grid according to the first aspect of the present disclosure described above and the filtrate tank according to the second aspect of the present disclosure described above.

[0039] Specifically, the grid is housed within the container portion of the tank, whereby the second surface of the grid is supported while facing the tank surface of the filtrate tank, and the grid is laterally demarcated by a boundary portion. Further, the grid is arranged and adjusted such that the grid topography and the tank topography fit together with each other.

[0040] According to an embodiment according to the third aspect of the present disclosure, the filtrate tank has a substantially rectangular shape, and has a filtrate discharge port provided in a corner region, and a topographic pattern extending parallel to the side surface portion between the supply region and the filtrate discharge port, as described in more detail in relation to the second aspect of the present disclosure. In such a case, one or more grids of the type having a grid topographic pattern extending between opposing side surface portions, as described in more detail in relation to the first aspect of the present disclosure, may be provided between the supply region and the filtrate discharge port.

[0041] According to an embodiment according to the third aspect of the present disclosure, the filtrate tank is of a type having a topographic pattern extending while inclining toward the side surface portion in the supply region of the tank surface. In such a case, one or more grids of the type having a grid topographic pattern extending between adjacent side surface portions, as described in more detail in relation to the first aspect of the present disclosure, may be provided in the supply region.

[0042] According to an embodiment according to the third aspect of the present disclosure, the filtrate tank is of a type having a topographic pattern extending while inclining toward the side surface portion in a corner region having a discharge port. In such a case, one or more grids of the type having a grid topographic pattern extending between adjacent side surface portions, as described in more detail in relation to the first aspect of the present disclosure, may be provided in the corner region having the discharge port.

[0043] It should be noted that the third aspect of the present disclosure includes any combination of two or more of the above-described embodiments, or a modification of an embodiment.

[0044] The fourth aspect of the present disclosure provides a vertical filter press such as a tower press.

[0045] This filter press includes - a plurality of superimposed filter plates. The superimposed filter plates are configured to be movable vertically between an open position separated from each other and a closed position approaching each other. Thereby, a flat filter chamber is formed between adjacent filter plate assemblies in the closed position. This filter press further includes - a filter medium disposed between adjacent filter plates, - a lifting device for lifting the filter plate assemblies away from each other or lowering the filter plate assemblies toward each other, - a sealing device for pressing a plurality of filter plate assemblies against each other in the closed position and sealing the filter chamber formed between the assemblies, - a supply mechanism for supplying slurry to the filter chamber, - a recovery mechanism for recovering filtrate from the filtrate outlet, and - a discharge mechanism for moving the filter medium to discharge the filter cake formed in the filter chamber.

[0046] Also, the filtrate tank assembly according to the embodiment of the third aspect of the present disclosure is provided on and supported by one or more of the filter plates. Further, the filter medium between the upper filter plate and the lower filter plate is placed on the grid of the filtrate tank assembly supported by the lower filter plate. The filtrate tank assembly of the lower filter plate is configured to collect the filtrate that has passed through the filter medium from the associated filter chamber during operation.

Brief Description of the Drawings

[0047] Hereinafter, the present disclosure will be described in detail by preferred embodiments with reference to the accompanying drawings.

Figure 1

Figure 2

Figure 3

Figure 4a

Figure 4c

[0048] FIG. 1 shows a partial perspective view of a filtrate tank assembly according to an embodiment of the present disclosure. Specifically, the tank assembly has a filtrate tank 4, and three different types of grids 1 are accommodated in the present filtrate tank. It should be noted that in the operating state, the bottom surface 4b of the tank 4 is covered with a plurality of additional grids not shown in FIGS. 1 to 3 for clarity.

[0049] Specifically, the tank 4 shown in FIG. 1 is formed as an inner lining of the tank. That is, the tank 4 has a main body portion with a relatively thin material thickness for covering another solid object (for example, a filter plate) that gives the main structural strength to the filtrate tank. Naturally, as another method, the filtrate tank may be provided as a thicker self-supporting structure.

[0050] The filtrate tank 4 is substantially rectangular and includes a pair of side surface portions 4c and 4d that face each other in parallel, 4d and a pair of front end surface portions 4e and 4f that face each other in parallel, and the front end surface portions 4e, 4f are orthogonal to the side surface portions 4c, 4d.

[0051] The filtrate tank is supported on a flat plate surface (not shown) of the filter plate. The grid surface 4b on the opposite side of the tank main body portion has a tank surface 5 disposed thereon, which defines the bottom of the container portion formed by the filtrate tank 4. Specifically, the container portion is configured to accommodate the filtrate obtained in the filtration process of the associated filter press (that is, from the filter chamber formed above the filtrate tank during use). The boundary portion 6 extends along the side surface portions 4c, 4d and the front end surface portions 4e, 4f and surrounds the tank surface 5, thereby defining the side wall of the container portion. The filtrate openings 7 are respectively disposed in four corner regions of the filtrate tank 4 that extend through the boundary portion 6 and serve as discharge paths for the filtrate contained in the container portion.

[0052] The groove surface 5 exhibits a topographic pattern formed as a plurality of protrusions provided as ball rims, and this topographic pattern extends along a desired flow path from a supply region (arranged at the central portion of the groove surface 5) to the discharge opening 7. Specifically, the desired flow path passes between each discharge opening 7 and the supply region 9.

[0053] The groove topographic pattern 8 is inclined with respect to the side surface portions 4c and 4d in the supply region 9 and extends along a curved path, guiding the filtrate flow away from the transverse central portion of the groove surface 5. The groove topographic pattern 8 further extends parallel to the side surface portions 4c and 4d toward the respective discharge openings 7, guiding the filtrate flow toward the tip surface portions 4e and 4f. Finally, in the corner region having the discharge opening 7, the groove topographic pattern 8 further extends along a curved path inclined with respect to the side surface portions 4c and 4d, guiding the filtrate flow to the discharge opening 7.

[0054] As described above, FIG. 1 shows three different types of grids 1 accommodated in the container portion of the filtrate tank and supported on the groove surface 5. Each grid has a plate-shaped main body portion having a first surface portion 1a with a flat surface and a second surface portion (not shown) facing the groove surface 5. During use, the filtration medium is supported on the first surface portion 1a, and the grid 1 is supported on the filtrate tank on the second surface portion. A plurality of holes 2 (see FIGS. 4a to 4c) are provided to allow fluid communication between the first surface portion 1a and the second surface portion. Although not shown, the second surface portion has a plurality of boss-like portions that separate the grid 1 on the tank from the groove surface 5, allowing the filtrate to flow between the boss-like portions.

[0055] The second surface of each grid has a grid topography, and this grid topography is inverted with respect to the groove topography of the groove surface 5 at the intended position of the grid 1. That is, the grid topography forms a topographic pattern 3 that extends in the same manner along the intended filtrate flow path of the filtrate tank 4 associated with the position of the grid 1. Further, the grid topographic pattern 3 fits into the topographic pattern 8 of the groove surface 5. In the structure of the drawing, the convex groove topographic pattern 8 is accommodated in the concave grid topographic pattern 3.

[0056] Figure 2 shows the same structure as that shown in Figure 1, and uses auxiliary dashed lines to represent the intended positions of other grids not shown in the drawing.

[0057] Also, in Figure 3, the structure of Figure 1 is shown as a plan view. The grid 1 arranged in the supply region 9 is shown in more detail in Figure 4a. The grid arranged in the corner region having the discharge opening 7 is shown in more detail in Figure 4c. Also, the grid 1 shown between the supply region 9 and the discharge opening 7 is shown in more detail in Figure 4b.

[0058] Figure 4a shows a plan view of the grid 1 as seen from its first face 1a. A plurality of holes 2 pass through the first face 1a and reach the opposing second face, whereby fluid can communicate between the faces. The protrusions of the grid topographic pattern 3 on the first face 1a are also provided on the second face, but are shown by dotted lines in the figure. Specifically, the grid topographic pattern 3 extends along a curved path between the adjacent side faces 1d, 1f. The grid shown in Figure 4a is substantially rectangular and includes a set of first parallel opposing side faces 1c, 1d and a set of second opposing side faces 1e, 1f, and the first and second sets of side faces are orthogonal to each other.

[0059] Figure 4b shows a plan view of the grid 1 in the same manner as Figure 4a. However, it is different from the grid in Figure 4a in that the grid topographic pattern 3 extends between the opposing side faces 1c, 1d along a linear path.

[0060] In addition, FIG. 4c shows a plan view of the grating 1, similar to FIG. 4a. However, it is different from the grating in FIG. 4a in that the grating topographic pattern 3 extends along a curved path between the adjacent side faces 1c and 1e. Further, the lattice 1 in FIG. 4c also includes a chamfered portion provided between the side faces 1e and 1d.

Explanation of Signs

[0061] 1 Grating 1a First face 1c, 1d First set of parallel side faces 1e, 1f Second set of parallel side faces 2 Plurality of hole 3 Grating topographic pattern 4 Filtrate tank 4a Flat plate surface 4b Grating surface 4c, 4d Side faces 4e, 4f Tip faces 5 Tank surface 6 Boundary portion 7 Filtrate discharge opening 8 Tank topographic pattern 9 Supply region

Claims

1. comprising a plate-like lattice body portion having a first face portion and a second face portion on the opposite side, the first face portion defines a substantially flat first surface for supporting a filter cloth during use, the second face portion defines a second surface including a plurality of protruding nodular portions provided at a distance from each other, and the nodular portions support the lattice on the associated filtrate tank at a distance from the filtrate tank, the body portion is a lattice of a vertical filter press such as a tower press including a plurality of holes for fluid communication between the first surface and the second surface, the second surface includes a lattice topography that fits into the corresponding inverted tank topography of the associated filtrate tank, the lattice topography forms a topographic pattern extending along a desired filtrate flow path between a supply region of a tank surface of the associated filtrate tank and a filtrate discharge opening at the position of the lattice, and is characterized in that it is a lattice of a vertical filter press filtrate tank assembly.

2. In the lattice according to claim 1, the lattice topography includes a plurality of depressions, and the plurality of depressions accommodate a corresponding tank topography of the associated filtrate tank including a plurality of protrusions. Further, the plurality of depressions form a concave pattern extending along a desired filtrate flow path of the associated filtrate tank at the position of the lattice, and is characterized in that it is a lattice.

3. In the lattice according to claim 1, the lattice topography includes a plurality of protrusions, and the plurality of protrusions are accommodated in a corresponding tank topography of the associated filtrate tank including a plurality of depressions. Further, the plurality of protrusions form a convex pattern extending along a desired filtrate flow path of the associated filtrate tank at the position of the lattice, and is characterized in that it is a lattice.

4. In the lattice according to any one of claims 1 to 3, the lattice body portion is substantially rectangular, has a first set of laterally opposing side face portions and a second set of laterally opposing side face portions, and the first set of side face portions is orthogonal to the second set of side face portions, and is characterized in that it is a lattice.

5. In the lattice according to any one of claims 1 to 4, the lattice topographic pattern extends between opposing side face portions of the lattice, preferably along a linear path, and is characterized in that it is a lattice.

6. In the lattice according to any one of claims 1 to 4, the lattice topographic pattern extends between adjacent side face portions of the lattice, preferably along a curved path, and is characterized in that it is a lattice.

7. A filtrate tank of a filtrate tank assembly of a vertical filter press such as a tower press, having a tank body portion, wherein the tank body portion includes a flat plate surface having a bottom surface that enables the filtrate tank to be supported on a filter plate, and a lattice surface facing the flat plate surface, and on the lattice surface, - a tank surface that defines the bottom of a container portion for accommodating and supporting associated grids that receive filtrate obtained in the filtration process of an associated vertical filter press, and - a boundary portion that defines the side wall of the container portion, surrounding at least a portion of the tank surface, is provided, the tank includes a filtrate discharge opening that provides a discharge path for discharging filtrate from the filtrate tank through the boundary portion, the tank surface has a tank topography that fits with a corresponding inverted grid topography of the associated grid, the tank topography forms a topographic pattern that extends along a desired filtrate flow path between a supply region of the tank surface and the filtrate discharge opening. A filtrate tank characterized by this.

8. In the filtrate tank according to claim 7, the tank topography includes a plurality of protrusions, and the plurality of protrusions are accommodated in a corresponding grid topography that the associated grid having a plurality of depressions has. Further, the plurality of protrusions form a convex pattern that extends along the desired filtrate flow path. A filtrate tank characterized by this.

9. In the filtrate tank according to claim 7, the tank topography includes a plurality of depressions, and the plurality of depressions accommodate a corresponding grid topography that the associated grid having a plurality of protrusions has. Further, the plurality of depressions form a concave pattern that extends along the desired filtrate flow path. A filtrate tank characterized by this.

10. In the filtrate tank according to any one of claims 7 to 9, the tank body portion is substantially rectangular, and has parallel opposing side surface portions and parallel opposing front end surface portions that extend along the longitudinal direction of the tank. The side surface portions are orthogonal to the front end surface portions, the filtrate discharge port is provided in a corner region between adjacent side surface portions and front end surface portions, the tank topographic pattern extends parallel to the side surface portion between the supply region and the filtrate discharge port. A filtrate tank characterized by this.

11. In the filtrate tank according to any one of claims 7 to 9, the tank body portion is substantially rectangular, and has parallel opposing side surface portions and parallel opposing front end surface portions that extend along the longitudinal direction of the tank. The side surface portions are orthogonal to the front end surface portions, The filtrate tank is characterized in that the groove topographic pattern extends inclinedly toward the side surface portion in the supply region of the groove surface.

12. In the filtrate tank according to claim 10 or 11, the groove topographic pattern extends inclinedly toward the side surface portion in a corner region having a discharge port.

13. In the filtrate tank according to any one of claims 7 to 12, the tank is provided as an inner lining of the tank having a material thickness of less than 15 mm.

14. A filtrate tank assembly of a vertical filter press such as a tower press, The filtrate tank assembly has a grid according to any one of claims 1 to 6 and a filtrate tank according to any one of claims 7 to 13, The grid is housed in the container portion of the tank, whereby the second surface of the grid is supported while facing the tank surface of the filtrate tank, and the grid is laterally demarcated by the boundary portion, The filtrate tank assembly is characterized in that the grid topography and the tank topography fit together.

15. In the filtrate tank assembly according to claim 14, the filtrate tank is the filtrate tank according to claim 10, and one or more grids described in claim 5 are provided between the supply region and the filtrate discharge port.

16. In the filtrate tank assembly according to claim 14 or 15, the filtrate tank is the filtrate tank according to claim 11, and one or more grids described in claim 6 are provided in the supply region.

17. In the filtrate tank assembly according to any one of claims 14 to 16, the filtrate tank is the filtrate tank according to claim 12, and one or more grids described in claim 6 are provided in a corner region having a discharge port.

18. A plurality of superimposed filter plates configured to be vertically movable toward an open position separated from each other and a closed position approaching each other, and a flat filter chamber is formed between adjacent filter plate assemblies in the closed position, A filter medium disposed between adjacent filter plates, A lifting device for lifting the filter plate assemblies away from each other or lowering the filter plate assemblies to approach each other, A sealing device for squeezing the plurality of filter plate assemblies against each other in the closed position and sealing the filter chamber formed between the filter plate assemblies, A supply mechanism for supplying slurry into the filter chamber a recovery mechanism for recovering filtrate from the filtrate discharge port; a vertical filter press such as a tower press, comprising a discharge mechanism for discharging the formed filter cake in the filter chamber by moving the filter medium, The filtrate tank assembly according to any one of claims 10 to 13 is provided on and supported by one or more of the filter plates, and the filter medium between the upper filter plate and the lower filter plate is placed on the grid of the filtrate tank assembly supported by the lower filter plate. The filtrate tank assembly of the lower filter plate is configured to collect the filtrate that has passed through the filter medium from the associated filter chamber during operation. A filter press characterized by that.

Images