A SEALING STRIP FOR SEALING ADJACENT FILTER PLATE ASSEMBLIES OF A FILTER PRESS, SUCH AS A TOWER PRESS, A FILTER FRAME, A FILTER FRAME ASSEMBLY, AND A FILTER APPARATUS
Patent Information
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- METSO OUTOTEC FINLAND OY
- Filing Date
- 2022-07-29
- Publication Date
- 2026-05-19
Smart Images
Figure MX434550B0
Abstract
Description
A SEALING STRIP FOR SEALING ADJACENT FILTER PLATE ASSEMBLIES OF A FILTER PRESS, SUCH AS A PRESS TOWER, A FILTER FRAME, A FILTER FRAME ASSEMBLY AND A FILTER APPARATUS The present description refers to filter presses, such as horizontal filter presses, for example, tower presses, and more particularly to sealing strips used in such filter presses to seal the interface between adjacent filter frame assemblies, between which a filter chamber is formed. This description also refers to a filter frame, a filter frame assembly, and a horizontal filter press apparatus, such as a tower press. Background of the Invention Conventionally, a sealing strip has been used to seal the interface between two adjacent filter frame assemblies, between which a filter chamber is formed. Such a filter frame assembly may consist of a frame and plate assembly, or a recessed plate incorporating both frame and plate portions. The sealing strip must be able to seal the filtration pressure prevailing in the filter chamber against the ambient pressure, as well as withstand the compressive pressure to which the adjacent filter frame assemblies are pressed against each other. Due to repetitive compression cycles and the often abrasive nature of the slurry being filtered, the sealing strip is a wear part that must be replaced periodically. The sealing strip is typically attached to the filter frame by providing the frame with a groove that has a cross-sectional profile that closely matches that of the sealing strip, thus securing the two together. The elasticity of the sealing strip allows it to be inserted into the groove during installation. Because the sealing strip must surround a relatively large filter chamber, it is usually supplied as an elongated strip with a first longitudinal end and a second longitudinal end (as opposed to a strip formed as a closed loop) for manufacturing and installation purposes. Consequently, the longitudinal ends must be firmly joined together to form a watertight seal between them. Since the sealing strip is made of an elastic material for practical reasons, achieving sufficient contact compression between its longitudinal ends is often quite cumbersome and time-consuming. This is because, firstly, the sealing strip deforms elastically when the longitudinal ends are pressed together, and secondly, the remaining portion of the strip, already inserted into the frame groove, prevents the axial ends from pushing against each other and tends to pull them back. Attempts have been made to address this by using an adhesive to secure the sealing strip in the groove, thus fixing the axial ends of the strip pressed together. However, this makes removing and replacing the sealing strip difficult, as the groove must be cleaned of adhesive residue before a new strip can be installed. Furthermore, the adhesive must be allowed to cure before the filter frame assembly can be used. Furthermore, a sealing strip requires sufficient height extending from the groove in the filter frame to allow for adequate compression and achieve the required sealing effect. However, excessive height of the sealing strip extending beyond the groove is undesirable, as this increases the distance adjacent filter frame assemblies must travel to open and close the filter chamber and achieve sufficient sealing pressure on the sealing strip, thus increasing the cycle time for each filtration cycle. At the same time, the sealing strip requires sufficient height to extend into the groove so that it is securely attached to the filter frame. However, increasing the height of the sealing strip, even within the groove, also increases the distance that adjacent filter frame assemblies must travel to open and close the filter chamber and achieve sufficient sealing pressure on the sealing strip, thereby increasing the cycle time for each filtration cycle. Summary of the Invention One object of the present description is to provide a sealing strip for sealing adjacent filter plate assemblies of a horizontal filter press, such as a tower press, a sealing strip that provides shorter cycle times and improved sealing between the longitudinal ends of the sealing strip and the interface between the sealing strip and an associated groove, while also facilitating installation and replacement. It is an additional object of the present description to provide a filter frame, a filter frame assembly, and a filter apparatus. The objects described are achieved by means of the sealing strip, the filter frame, the filter frame assembly, and the filter apparatus, which are characterized as set forth in the independent claims. Preferred embodiments of the description are described in the dependent claims. CQCAnn / zznzE / γΐΛΐ The description is based on the idea of providing the sealing strip with a reinforcement in a part of the base of the sealing strip, positioned so that it intersects a line that passes through a flange provided in a distal part of the sealing strip and extends along a vertical direction, perpendicular to both the length and width directions of the sealing strip, as viewed along the cross-sectional profile of the sealing strip. This ensures that the deformation caused by compression exerted on the sealing strip by an adjacent surface against which it is pressed is resisted by the reinforcement. This results in greater surface pressure between the sealing strip and the surface against which it is pressed, with less deformation. As a result, several advantages are achieved simultaneously. First, sufficient sealing pressure between the longitudinal ends of the sealing strip is more easily achieved, as the ends can be pushed together more easily and less deformation is required. Second, minimal deformation of the sealing strip's base is required to achieve sufficient sealing pressure between the strip and the sealing groove. Consequently, the seal between the strip and the sealing groove is improved, while installation of the strip into the groove is simplified. Third, less deformation of the sealing strip is also required to achieve a sufficient seal between the strip and the adjacent filter frame assembly.Consequently, a seal is achieved between the sealing strip and the adjacent filter frame assembly, while a shorter compression stroke is required to achieve sufficient surface pressure, closing the filter chamber and thus reducing the total stroke required to open and close it. As a result, the cycle time for each filtration cycle is reduced. Brief Description of the Drawings The invention will now be described in greater detail by means of preferred embodiments with reference to the accompanying drawings, in which Figure 1 schematically shows a portion of a filter frame assembly according to one embodiment of the present disclosure, illustrated as a cross-sectional view, as seen along a longitudinal direction; Figure 1a is a detailed view of Figure 1 showing the sealing strip and a sealing slot into which it is received; corfinn / zznz / B / YiAi Figure 2 schematically shows a sealing strip according to one modality of the present description, illustrated as a cross-sectional view, viewed along the longitudinal direction of the sealing strip; Figure 2a is a plan view of the sealing strip of Figure 2; Figure 3 schematically shows a filter frame according to one modality of the present description, illustrated as a cross-sectional view, seen along a longitudinal direction, and Figure 3a is a detailed view of Figure 3 showing the filter frame sealing groove. Detailed Description of the Invention According to a first aspect of the present description, a sealing strip 1 is provided for sealing adjacent filter plate assemblies of a filter press, such as a horizontal filter press, for example, a tower press. These horizontal filter presses are typically used to filter suspensions that are introduced into the filter chamber with a filtration pressure differential of 8 to 20 bar relative to ambient pressure, usually around 12 bar. To achieve a sufficient seal at the interface between adjacent filter frame assemblies, a sealing strip must withstand a linear load of 30 to 300 N / mm, typically between 100 and 150 N / mm. The sealing strip 1 comprises an elongated body 2 extending along a longitudinal direction and having a first longitudinal end 1a and a second longitudinal end 1b. The elongated body 2 has a cross-sectional profile comprising a base portion 3 for attachment into a corresponding groove 9 of an associated filter plate assembly or filter frame. The cross-sectional profile of the sealing strip 2 also comprises a distal portion 4 for sealing against an adjacent filter plate assembly. A flange 4a is provided on the distal portion 4 to increase the sealing pressure there when the sealing strip 1 is compressed against an adjacent filter plate assembly. The cross-sectional profile of the sealing strip 1 also comprises an intermediate portion 5 between the base portion 3 and the distal portion 4. The intermediate part 5 has a width W5, defined along a lateral transverse direction and coplanar to the longitudinal direction, less than the W3 of the base portion 3. In other words, the cross-sectional profile of the sealing strip 1, when viewed along the longitudinal direction, is narrower in the intermediate portion 5 than in the base portion 3. The sealing strip 1 further comprises an elongated reinforcement 6 that runs along at least part of the length of the sealing strip 1. In addition, the reinforcement cuts a line (L1) that runs through flange 4a and extends along a vertical direction, perpendicular to both the longitudinal and width directions as viewed along the cross-section profile. In addition, reinforcement 6 is encapsulated by body 2 of sealing strip 1. In a modality according to the first aspect of the present description, the reinforcement 6 is longitudinally separated either from the first longitudinal end 1a and from the second longitudinal end 1bo of both. Preferably, but not necessarily, reinforcement 6 is longitudinally separated by a distance D of 1 mm - 10 mm from the first longitudinal end 1a and the second longitudinal end 1b or both. In a modality according to the first aspect of the present description, the reinforcement 6 is made of a material that has a higher rigidity than that of the body 2 of the sealing strip 1. For example, reinforcement 6 may have a modulus of elasticity at least 100 times greater than that of body 2. Preferably, but not necessarily, reinforcement 6 may have a modulus of elasticity at least 500 times greater than that of body 2. More preferably, but not necessarily, reinforcement 6 may have a modulus of elasticity at least 1,000 times greater than that of body 2. Most preferably, but not necessarily, reinforcement 6 may have a modulus of elasticity at least 10,000 times greater than that of body 2. It should be noted that reinforcement 6 may even have a modulus of elasticity at least 100,000 times greater than that of body 2. Furthermore, it should be taken into account that, in addition to the modulus of elasticity, for example, the geometry, such as the shape of the cross-section of reinforcement 6, affects the stiffness provided by reinforcement 6. In an embodiment according to the first aspect of the present description, the reinforcement 6 has a maximum cross-sectional width along the lateral direction of between 10% - 85% of the maximum total cross-sectional width of the sealing strip 1 along the lateral direction. Preferably, but not necessarily, reinforcement 6 can have a maximum cross-sectional width along the lateral direction of between 30% and 75% of the maximum total cross-sectional width of sealing strip 1 along the lateral direction. cor«nn / zznz / B / YiAi Preferably, but not necessarily, reinforcement 6 may have a maximum cross-sectional width along the lateral direction of between 50% and 60% of the maximum total cross-sectional width of sealing strip 1 along the lateral direction. Appropriately, the maximum total width of the cross section is presented in the base portion 3 of the sealing strip 1. In an embodiment according to the first aspect of the present description, the reinforcement 6 has a maximum cross-section height along the vertical direction of between 10% and 50% of the maximum total cross-section height of the sealing strip 1 along the vertical direction. Preferably, but not necessarily, reinforcement 6 can have a maximum cross-section height along the vertical direction of between 12% and 35% of the maximum total cross-section height of sealing strip 1 along the vertical direction. Preferably, but not necessarily, reinforcement 6 may have a maximum cross-section height along the vertical direction of between 15% and 25% of the maximum total cross-section height of sealing strip 1 along the vertical direction. Conveniently, the maximum overall height of the cross section is shown on line L1 running through flange 4a and extending along a vertical direction, perpendicular to both the longitudinal and width directions as seen along the cross section profile. In one embodiment according to the first aspect of the present description, the sealing strip 1 is asymmetric with respect to a center line L1 that runs vertically through a lateral center of the distal part 4, thus defining a chamber side 1c and an outer side 1d. Preferably, but not necessarily, the centerline L1 runs through flange 4a. Preferably, but not necessarily, the base portion 3 extends laterally further on the side 1c of the chamber than on the outer side 1d, with respect to the centerline L1. Preferably, but not necessarily, the intermediate portion 5 extends laterally further on the outer side 1d than on the side 1c of the chamber, with respect to the centerline L1. Preferably, but not necessarily, the base portion 3 exhibits a greater curvature on the 1c side of the chamber than on the outer 1d side. cor«nn / zznz / B / YiAi Preferably, but not necessarily, the cross-section profile of the sealing strip 1, on the 1c side of the chamber, the curvature of the base portion 3 extends continuously to the middle part. For example, the curvature of the base portion 3 can be transformed into the intermediate part as a continuous curvature. Preferably, but not necessarily, on the outer side 1d, the shape of the cross-section of the base portion 3 has a linear outline that extends to the intermediate part 5. It should be noted that the first aspect of this disclosure covers any combination of two or more modalities, or variants thereof, as discussed above. According to a second aspect of the present description, a filter frame 7 is provided for a filter press, such as a horizontal filter press, for example, a tower press. The filter frame 7 defines a boundary that forms a laterally closed, flat opening 8. It should be noted that the frame 7 itself need not be flat. However, the opening 8 must be flat in the sense that it has at least one flat boundary (i.e., the opening 8 can occupy three-dimensional space). When in use, the flat opening 8 forms a side wall of a filter chamber. The filter press frame can be provided as a separate frame (which, in turn, could be provided as a separate frame part assembly) or, alternatively, as an integrated frame part of a recessed-type plate that incorporates the filter plate and the plate frame as a single unit. The filter frame 7 comprises, on a flat side 7a thereof, a sealing groove 9 surrounding the flat opening 8. The sealing groove 9 has a cross-sectional profile comprising a bottom portion 10 and a neck portion 11 opening between the bottom portion 10 and the flat side 7a of the filter frame 7. The neck portion 11 has a cross-sectional width W11 less than that of the bottom portion 10. For the purposes of this disclosure, the direction of the cross-sectional profile width of the sealing groove 9 is defined as coplanar with and transverse to the longitudinal direction of the filter groove (i.e., the direction in which the groove extends around the filter frame). In other words, in the cross-sectional profile of the frame 7, viewed along a direction in which the groove extends at a given point, the neck portion 11 is narrower than the bottom portion 10. In particular, the cross-sectional profile of the sealing groove 9 can be asymmetric with respect to a vertical line L7 extending perpendicularly to the flat side 7a through a lateral center point of the bottom 10, thus defining a chamber side 1c and an outer side 1d. Preferably, but not necessarily, side 1c of the lower chamber 10 may have a greater curvature than the outer side 1d of the lower chamber 10. Preferably, but not necessarily, in the cross-section profile of the filter frame 7, on the camera side 7c, the curvature of the lower part 10 extends continuously to the neck part 11. For example, the curvature of the lower part 10 can be transformed into the neck part 11 as a continuous curvature. Preferably, but not necessarily, in the cross-section profile of the filter frame 7, on the outer side 7d, the lower part 10 has a linear contour extending to the neck part 11. It should be noted that the second aspect of this description covers any combination of two or more modalities, or variants thereof, as discussed above. Pursuant to a third aspect of this disclosure, a filter frame assembly is provided to support a filter plate of a filter press, such as a horizontal filter press, for example, a tower press. The frame assembly comprises a filter frame 7 that defines a boundary forming a laterally closed, flat opening 8. As discussed previously, the filter frame 7 itself need not be flat, although the opening 8 must be flat in the sense that it defines at least one flat boundary of the frame. That is, the opening 8 may occupy a three-dimensional space that defines at least one plane within it. When in use, the flat opening 8 forms a side wall of a filter chamber. The filter frame 7 must be provided either as a separate frame (which, in turn, could be provided as an assembly of separate frame portions) or, alternatively, as an integrated frame portion of a recessed-type plate that incorporates the filter plate and the plate frame as a single unit. The filter frame 7 comprises, on a flat side 7a thereof, a sealing groove surrounding the flat opening 8. The sealing groove 9 has a cross-sectional profile comprising a lower portion 10 and a neck portion 11 that opens between the lower portion 10 and the flat side 7a of the filter frame 7. Furthermore, the neck portion 11 has a cross-sectional width W11 less than that of the lower portion 10. That is, in the cross-sectional profile of the frame 7, the neck portion 11 is narrower than the lower portion 10, viewed from the direction in which the groove extends at a given point. cor«nn / zznz / B / YiAi In particular, the filter plate assembly further comprises the sealing strip 1 according to any first aspect of the present description. The sealing strip 1 is received in the sealing groove 9, such that the lower portion 10 of the filter plate 7 fits snugly with the base portion 3 of the sealing strip 1, thereby securing the sealing strip 1 to the filter frame 7. In one embodiment according to the third aspect of the present description, both the sealing strip 1 and the sealing groove 9 of the filter frame 7 are asymmetrical, as explained in relation to the respective embodiments and variants thereof, of the first and second aspects of the present invention. In an embodiment according to the third aspect of the present description, both the sealing strip 1 and the sealing groove 9 have a greater curvature on the 1c, 7c side of the chamber than on the outer 1d; 7d side, as analyzed in relation to the respective embodiments and variants thereof, of the first and second aspects of the present invention. In an embodiment according to the third aspect of this disclosure, in the cross-sectional profile of both the sealing strip 1 and the sealing groove 9 of the filter frame 7, on the 1c, 7c side of the chamber, the curvature of the base portion and the lower part 10 extends to the middle part 5 and, respectively, the neck part 11, continuously, as explained in relation to the corresponding embodiments and variants thereof, of the first and second aspects of this disclosure. In an embodiment according to the third aspect of the present description, in the cross-section profile of both the sealing strip 1 and the sealing groove 9 of the filter frame 7, on the outer side 1d; 7d, the base portion and the bottom portion 10 have a linear contour extending to the intermediate portion 5 and, respectively, the neck portion 11, as explained in relation to the corresponding embodiments, and variants thereof, of the first and second aspects of the present disclosure. In accordance with a fourth aspect of this description, a filter press is provided. Preferably, but not necessarily, the filter press is a horizontal filter press, such as a tower press. The filter press comprises a plurality of filter frame assemblies according to any of the embodiments, or variants thereof, of the third aspect as described above. The filter frame assemblies are configured to move toward each other into a closed position in which a filter chamber is formed between adjacent filter frame assemblies, and to move away from each other into an open position in which the adjacent filter frame assemblies are separated from each other. The filter press further comprises a filter medium arranged between adjacent filter frame assemblies. The filter press further comprises a displacement arrangement for moving the filter frame assemblies relative to each other to form a filter chamber between adjacent filter frame assemblies, and moving them apart to open the filter chamber. The filter press also includes a feeding arrangement for feeding suspension to the filter chamber. The filter press also includes a recovery arrangement to recover filtrate from the filter chamber. The filter press also includes a discharge arrangement for discharging a filter cake formed inside the filter chamber. Figure 1 schematically shows a portion of a filter frame assembly according to an embodiment of the fourth aspect of the present description, illustrated as a cross-sectional view seen along a longitudinal direction. The filter frame assembly comprises a filter frame 7 and a sealing strip 1 attached to it on a flat side 7a of the filter frame 7. The filter frame 7 defines a boundary forming a laterally closed, flat opening 8. Figure 1a is a detailed view of Figure 1 showing the sealing strip 1 and a sealing groove 9 of the filter frame 7 into which the sealing strip 1 is received. Sealing strip 1 in Figure 1 is illustrated in more detail in Figures 2 and 2a. Figure 2 schematically illustrates a cross-sectional profile of sealing strip 1, while Figure 2a illustrates a plan view of sealing strip 1. The filter frame 7 of Figure 1 is illustrated in more detail in Figure 3 and Figure 3a. Figure 3 illustrates a cross-sectional profile of a section of the filter frame 7, while Figure 3a illustrates a detailed view of the filter slot 9 of the filter frame 7. List of reference numbers for sealing strip 1a first longitudinal end of the sealing strip b second longitudinal section of the sealing strip 1c camera side 1d outer side cor«nn / zznz / B / YiAi L1 vertical line L1 extending through the lateral center of the distal portion elongated body base portion W3 width of the base portion distal portion of the sealing strip 4a flange on the distal portion, middle part of the sealing strip W5 width of the middle section, elongated reinforcement, filter frame 7a flat side of the filter frame L7 vertical line extending through the center side of the bottom 10 flat opening sealing slot bottom W10 width of the lower portion of the neck W11 width of the neck portion D is the distance at which the reinforcement is separated from a longitudinal end.
Claims
1. A sealing strip (1) for sealing adjacent filter plate assemblies of a horizontal filter press, such as a tower press, the sealing strip (1) comprising an elongated body (2) extending along a longitudinal direction, having a first longitudinal end (1a), a second longitudinal section (1b), and a cross-sectional profile having: - a base portion (3) for being fixed in a corresponding groove (9) of a filter frame or associated filter plate assembly; - a distal portion (4) for sealing against an adjacent filter plate assembly, a flange (4a) being provided on the distal portion (4) to increase the sealing pressure therein when the sealing strip is compressed against an adjacent filter plate assembly; and - an intermediate portion (5) between the base portion (3) and the distal portion, wherein the intermediate portion (5) has a width (W5).defined along a transverse lateral direction and coplanar to the longitudinal direction, smaller than (W3) of the base portion (3), wherein the sealing strip (1) further comprises an elongated reinforcement (6) running along at least a portion of the length of the sealing strip (1), characterized in that the reinforcement is positioned in the base portion such that it intersects a line (L1) running through the flange (4a) and extending along a vertical direction, perpendicular to both the length and width directions as seen along the cross-section, and wherein the reinforcement (6) is encapsulated by the body (2) of the sealing strip (1).
2. The sealing strip according to claim 1, characterized in that the reinforcement (6) is longitudinally separated from the first longitudinal end (1a) and from the second longitudinal end (1b) or from both.
3. The sealing strip according to claim 2, characterized in that the reinforcement (6) is longitudinally separated by a distance (D) of 1 mm - 10 mm from one or both of the first longitudinal end (1a) and the second longitudinal end (1b).
4. The sealing strip according to any of the preceding claims 1-3, characterized in that the reinforcement (6) is made of a material having a higher rigidity than the body (2) of the sealing strip (1).
5. The sealing strip according to claim 4, characterized in that the reinforcement (6) has an elastic modulus at least 100 times greater than that of the body (2), wherein the reinforcement (6) preferably has an elastic modulus at least 500 times greater than that of the body (2), and wherein the reinforcement (6) more preferably has an elastic modulus at least 1,000 times greater than that of the body (2), and wherein the reinforcement (6) more preferably has an elastic modulus at least 10,000 times greater than that of the body (2).
6. The sealing strip according to any of the preceding claims 1-5, characterized in that the reinforcement (6) has a maximum cross-sectional width along the lateral direction of between 10% and 85% of the maximum total cross-sectional width of the sealing strip (1) along the lateral direction, wherein the reinforcement (6) more preferably has a maximum cross-sectional width along the lateral direction of between 30% and 75% of the maximum total cross-sectional width of the sealing strip (1) along the lateral direction, and wherein the reinforcement (6) most preferably has a maximum cross-sectional width along the lateral direction of between 50% and 60% of the maximum total cross-sectional width of the sealing strip (1) along the lateral direction.
7. The sealing strip according to any of the preceding claims 1-6, characterized in that the reinforcement (6) has a maximum cross-sectional height along the vertical direction of between 10% - 50% of the maximum total cross-sectional height of the sealing strip (1) along the vertical direction, wherein the reinforcement (6) more preferably has a maximum cross-sectional height along the vertical direction of between 12% - 35% of the maximum total cross-sectional height of the sealing strip (1) along the vertical direction, and wherein the reinforcement (6) more preferably has a maximum cross-sectional height along the vertical direction of between 15% and 25% of the maximum total cross-sectional height of the sealing strip (1) along the vertical direction.
8. The sealing strip according to any of the preceding claims 1-7, characterized in that the sealing strip (1) is asymmetric with respect to a center line (I) running vertically through a lateral center of the distal portion (4), thus defining a side (1c) of the chamber and an outer side (1d).
9. The sealing strip (1) according to claim 8, characterized in that the base portion (3) extends laterally further on the side (1c) of the chamber than on the outer side (1d), with respect to the centerline (L1).
10. The sealing strip (1) according to claim 8 or 9, characterized in that the intermediate portion (5) extends laterally further on the outer side (1d) than on the side (1c) of the chamber, with respect to the centerline. CQCRnn / zznzB / YiAi 11. The sealing strip (1) according to claim 8-10, characterized in that the base portion (3) has a greater curvature on the side (1c) of the chamber than on the outer side (1d).
12. The sealing strip (1) according to claim 11, characterized in that in the cross-section profile of the sealing strip (1), on the side (1c) of the chamber, the curvature of the base portion (3) extends continuously to the intermediate portion (5).
13. The sealing strip (1) according to any of the preceding claims 8-12, characterized in that, on the outer side (1 d), the shape of the cross-section of the base portion (3) has a linear contour that extends to the intermediate portion (5). 14.A filter frame (7) for a horizontal filter press, such as a tower press, the filter frame (7) defining a boundary forming a laterally closed flat opening (8), wherein the filter frame (7) comprises, on a flat side (7a) thereof, a sealing groove (9) surrounding the flat opening (8), wherein the sealing groove (9) has a cross-sectional profile comprising: - a lower portion (10), and - a neck portion (11) opening between the lower portion (10) and the flat side (7a) of the filter frame (7), wherein the neck portion (11) has a cross-sectional width (w11) less than (w10) of the lower portion (10), characterized in that the cross-sectional profile of the sealing groove (9) is asymmetric with respect to a vertical line (L7) extending perpendicularly to the flat side (7a) through a lateral center point of the lower portion (10), thus defining a side (1c) of the camera and an outer side (1d).
15. The filter frame according to claim 14, characterized in that the side (1c) of the lower chamber (10) has a greater curvature than the outer side (1d) of the lower part (10).
16. The filter frame according to claim 15, characterized in that in the cross-section profile of the filter frame (7), on the chamber side (1c), the curvature of the lower part (10) extends continuously to the neck portion (11).
17. The filter frame according to any of the preceding claims 14-16, characterized in that in the cross-sectional profile of the filter frame (7), on the outer side (1d), the lower part (10) has a linear contour extending to the neck portion (11).
18. A filter frame assembly for supporting a filter plate of a horizontal filter press, such as a tower press, the frame assembly comprising a filter frame (7) defining a boundary forming a laterally closed flat opening (8), wherein the filter frame (7) comprises, on a flat side (7a) thereof, a sealing groove surrounding the flat opening (8), wherein the sealing groove (9) has a cross-sectional profile comprising: - a lower portion (10), and - a neck portion (11) opening between the lower portion (10) and the flat side (7a) of the filter frame (7), wherein the neck portion (11) has a cross-sectional width (w11) less than (w10) of the lower portion (10), characterized in that the filter frame assembly further comprises a sealing strip according to any of the preceding claims 1-13, wherein the sealing strip (1) is received in the sealing groove (9),so that the lower part (10) of the filter frame (7) fits snugly with the base portion (3) of the sealing strip (1), thereby securing the sealing strip (1) to the filter frame (7).
19. The filter frame assembly according to claim 18, characterized by a sealing strip (1) according to any of the preceding claims 8-10, and by a filter frame according to claim 16.
20. The filter frame assembly according to claim 18 or 19, characterized by a sealing strip (1) according to claim 1 and by a filter frame according to claim 15.
21. The filter frame assembly according to any of the preceding claims 18-20, characterized by a sealing strip (1) according to claim 12, and by a filter frame according to claim 16.
22. The filter frame assembly according to any of the preceding claims 18-21, characterized by a sealing strip (1) according to claim 13, and by a filter frame according to claim 17.
23. A horizontal filter press, such as a tower press, characterized in that the filter comprises: a plurality of filter frame assemblies according to any of claims 18 to 22 above, wherein the filter frame assemblies are configured to be movable, one toward another, to a closed position in which a filter chamber is formed between adjacent filter frame assemblies, and to separate them from each other, to an open position in which the adjacent filter frame assemblies are separated from each other; a filter medium disposed between adjacent filter frame assemblies; a displacement arrangement for moving filter frame assemblies toward each other to form a filter chamber between adjacent filter frame assemblies, and for moving them away from each other to open the filter chamber; and a feeding arrangement for feeding suspension to the filter chamber.a recovery arrangement for recovering filtrate from the filter chamber, and a discharge arrangement for discharging a filter cake formed within the filtration chamber.