Sealing strip, filter frame, filter frame assembly and filter device

Abstract

The present disclosure relates to a sealing strip (1) for sealing adjacent filter plate assemblies of a horizontal filter press. The present disclosure is based on the idea of configuring the sealing strip (1) with a reinforcement (6) at a base portion (3) of the sealing strip (1), which reinforcement is positioned to intersect a line extending through a ridge (4a) provided on a distal portion (4) of the sealing strip (1) and in a vertical direction perpendicular to both a length direction and a width direction of the sealing strip, as seen along a cross-sectional profile of the sealing strip (1). The present disclosure also relates to a filter apparatus, a filter frame and a filter frame assembly having said sealing strip.

Description

[0001] This application is a divisional application of Metso Finland GmbH’s invention patent application (filed on April 19, 2021, application number 202110417890.6, entitled “Sealing strip, filter frame, filter frame assembly and filter device”). Technical Field

[0002] This disclosure relates to filter presses, such as horizontal filter presses, for example, tower presses, and more specifically, to sealing strips used in such filter presses for sealing interfaces between adjacent filter frame assemblies, forming filter chambers between adjacent filter frame assemblies.

[0003] This disclosure also relates to filter frames, filter frame assemblies, and horizontal filter press equipment, such as tower presses. Background Technology

[0004] Traditionally, sealing strips are used to seal the interface between two adjacent filter frame assemblies, forming a filter chamber between them. Such filter frame assemblies can be formed from frame and plate assemblies, or from a recessed plate containing both frame and plate portions. In addition to withstanding the compression pressure when adjacent filter frame assemblies are pressed together, the sealing strip must also withstand environmental pressure to seal the dominant filtration pressure within the filter chamber. Due to repeated compression cycles and the typically abrasive nature of the filtered slurry, the sealing strip is a wear component and must be replaced periodically.

[0005] The sealing strip is typically attached to the filter frame by providing a groove with a cross-sectional profile that closely matches the cross-sectional shape of the sealing strip, thereby 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 large filter chamber, it is typically constructed as a long 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 reasons.

[0006] As a result, the longitudinal ends must be firmly abutted against each other to form a tight seal between the longitudinal ends of the sealing strip. Since the sealing strip is made of an elastic material for practical reasons, achieving sufficient abutment between the longitudinal ends of the sealing strip is often quite cumbersome and time-consuming. This is primarily because the sealing strip undergoes elastic deformation when the longitudinal ends are pressed against each other, and secondly because the remaining sealing strip, already inserted into the groove of the frame, prevents the axial ends from pushing against each other and tends to pull the longitudinal ends back.

[0007] Adhesive has been attempted to overcome this problem by fixing the seal strip in place within the groove, thereby pressing the axial ends of the seal strip together. However, this hinders the removal and replacement of the seal strip, as adhesive residue must be removed from the groove before a new seal strip can be installed. Additionally, the adhesive must be allowed to cure before the filter frame assembly can be used.

[0008] In addition, the sealing strip needs to extend sufficiently high from the groove on the filter frame to allow for adequate compression and achieve the desired seal. However, it is undesirable for the sealing strip to extend too high out of the groove, as this increases the distance that adjacent filter frame assemblies must travel to open and close the filter chamber and obtain sufficient sealing pressure at the sealing strip, thus increasing the cycle time for each filtration cycle.

[0009] At the same time, the sealing strip needs to extend sufficiently within the groove to securely attach to the filter frame. However, even increasing the height of the sealing strip within the groove increases the distance that adjacent filter frame assemblies must travel to open and close the filter chamber and obtain sufficient sealing pressure at the sealing strip, thus increasing the cycle time for each filtration cycle. Summary of the Invention

[0010] The purpose of this disclosure is to provide a sealing strip for sealing adjacent filter plate assemblies in a horizontal filter press (such as a tower press), which reduces cycle time and improves the sealing between the longitudinal ends of the sealing strip and between the sealing strip and the associated groove, while facilitating installation and replacement.

[0011] Another object of this disclosure is to provide a filter frame, a filter frame assembly, and a filter device.

[0012] One object of this disclosure is achieved by a sealing strip. The sealing strip according to this disclosure is used to seal adjacent filter plate assemblies of a horizontal filter press, such as a tower press. The sealing strip includes an elongated body extending along its length and having a first longitudinal end and a second longitudinal end, and a cross-sectional profile comprising: a base portion attached to a corresponding groove in the associated filter frame or filter plate assembly and having a maximum total width of the sealing strip in the transverse direction; a distal portion for sealing against an adjacent filter plate assembly, the distal portion having a ridge for increasing the sealing pressure on the distal portion when the sealing strip presses against the adjacent filter plate assembly; and an intermediate portion located between the base portion and the distal portion, wherein the intermediate portion has a width defined along a transverse direction coplanar with and transverse to the length direction, the width of which is smaller than the width of the base portion. The sealing strip also includes an elongated reinforcement extending along at least a portion of the length of the sealing strip, the reinforcement being positioned at the base portion such that the reinforcement intersects a line passing through the ridge and extending in a vertical direction perpendicular to both the length and width directions, and the reinforcement being encapsulated by the body of the sealing strip.

[0013] Preferably, the reinforcing member is longitudinally spaced from one or both of the first longitudinal end and the second longitudinal end.

[0014] Preferably, the reinforcing member is spaced 1mm-10mm apart from one or both of the first longitudinal end and the second longitudinal end in the longitudinal direction.

[0015] Preferably, the reinforcing member is made of a material with greater stiffness than the body of the sealing strip.

[0016] Preferably, the elastic modulus of the reinforcing member is at least 100 times that of the elastic modulus of the body, and more preferably at least 500 times, more preferably at least 1000 times, and most preferably at least 10000 times.

[0017] Preferably, the maximum width of the cross-section of the reinforcing member in the transverse direction is between 10% and 85% of the maximum total width of the cross-section of the sealing strip in the transverse direction, more preferably between 30% and 75%, and most preferably between 50% and 60%.

[0018] Preferably, the maximum height of the cross-section of the reinforcing member in the vertical direction is between 10% and 50% of the maximum total height of the cross-section of the sealing strip in the vertical direction, more preferably between 12% and 35%, and most preferably between 15% and 25%.

[0019] Preferably, the sealing strip is asymmetrical about the centerline that extends vertically through the lateral center of the distal portion, thereby defining the chamber side and the outer side.

[0020] Preferably, the basal portion extends laterally further on the chamber side than on the outer side relative to the centerline.

[0021] Preferably, the middle portion extends laterally on the outer side than on the chamber side relative to the centerline.

[0022] Preferably, the base portion exhibits a greater curvature on the chamber side than on the outer side.

[0023] Preferably, in the cross-sectional profile of the sealing strip, on the chamber side, the curvature of the base portion extends continuously to the middle portion.

[0024] Preferably, on the outer side, the cross-sectional shape of the base portion presents a linear profile extending to the middle portion.

[0025] Another object of this disclosure is achieved by a filter frame for use in a horizontal filter press, such as a tower press. The filter frame defines a boundary forming a laterally closed planar opening that forms a sidewall of a filter chamber. The filter frame has a sealing groove on its planar side surrounding the planar opening. The cross-sectional profile of the sealing groove includes a bottom portion and a neck portion that opens between the bottom portion and the planar side of the filter frame. The cross-sectional width of the neck portion is smaller than the cross-sectional width of the bottom portion. The cross-sectional profile of the sealing groove is asymmetrical with respect to a vertical line extending perpendicularly to the planar side through the lateral center point of the bottom portion, thereby defining the chamber side and the outer side.

[0026] Preferably, the chamber side of the bottom portion exhibits a greater curvature than the outer side of the bottom portion.

[0027] Preferably, in the cross-sectional profile of the filter frame, on the chamber side, the curvature of the bottom portion extends continuously to the neck portion.

[0028] Preferably, in the cross-sectional profile of the filter frame, on the outer side, the bottom portion presents a linear profile extending to the neck portion.

[0029] Another object of the present invention is achieved by a filter frame assembly for supporting filter plates of a horizontal filter press, such as a tower press. The filter frame assembly includes a filter frame defining a boundary that forms a laterally closed planar opening. The filter frame includes a sealing groove on its planar side surrounding the planar opening. The cross-sectional profile of the sealing groove includes a bottom portion and a neck portion that opens between the bottom portion of the filter frame and the planar side, wherein the cross-sectional width of the neck portion is smaller than the cross-sectional width of the bottom portion. The filter frame assembly also includes the aforementioned sealing strip according to the present disclosure, wherein the sealing strip is received in the sealing groove such that the bottom portion of the filter frame and the base portion of the sealing strip form-fits each other, thereby securing the sealing strip to the filter frame.

[0030] Another object of the present invention is achieved by a horizontal filter press, such as a tower press. The filter press includes: Multiple filter frame assemblies according to the present disclosure, wherein the filter frame assemblies are configured to move toward each other to a closed position in which a filter chamber is formed between adjacent filter frame assemblies; and to move away from each other to an open position in which adjacent filter frame assemblies are spaced apart from each other. Filter media are arranged between adjacent filter frame assemblies; Translation device for moving the filter frame assemblies toward each other to form a filter chamber between adjacent filter frame assemblies; and for moving the filter frame assemblies away from each other to open the filter chamber; A feeding device for supplying slurry into the filter chamber; Recovery device for recovering filtrate from the filtration chamber, and A discharge device for discharging the filter cake formed in the filter chamber.

[0031] This disclosure is based on the idea of ​​providing a reinforcement for the sealing strip at the base portion and positioning it to intersect a line that passes through a ridge provided on the distal portion of the sealing strip and extends in a vertical direction perpendicular to both the length and width directions of the sealing strip, as can be seen along the cross-sectional profile of the sealing strip.

[0032] This ensures that the reinforcement can resist deformation caused by the pressure exerted on the sealing strip by the adjacent surface it presses against. In this way, greater surface pressure can be achieved between the sealing strip and the surface it presses against with less deformation.

[0033] The result is several advantages achieved simultaneously. First, sufficient sealing pressure is more easily obtained between the longitudinal ends of the sealing strip because the longitudinal ends can be more easily pushed together with less deformation required. Second, the base of the sealing strip requires only minor deformation to achieve sufficient sealing pressure between the sealing strip and the sealing groove, thus improving the seal between the sealing strip and the sealing groove and facilitating installation of the sealing strip in the sealing groove. Third, the sealing strip also requires only minor deformation to achieve a sufficient seal between the sealing strip and the adjacent filter frame assembly, thereby achieving a seal between the sealing strip and the adjacent filter frame assembly and shortening the compression stroke required to obtain sufficient surface pressure and close the filter chamber, thus reducing the total stroke required to open and close the filter chamber. As a result, the cycle time for each filtration cycle is reduced. Attached Figure Description

[0034] The present disclosure will now be described in more detail with reference to the accompanying drawings and preferred embodiments, wherein...

[0035] Figure 1 A portion of a filter frame assembly according to an embodiment of the present disclosure is shown schematically in a cross-sectional view along the longitudinal direction.

[0036] Figure 1a yes Figure 1 A detailed view shows the sealing strip and the sealing groove that houses the sealing strip.

[0037] Figure 2 A cross-sectional view schematically illustrates a sealing strip according to an embodiment of the present disclosure, as seen along the longitudinal direction of the sealing strip.

[0038] Figure 2a yes Figure 2 A plan view of the sealing strip.

[0039] Figure 3 A cross-sectional view schematically illustrates a filter frame according to an embodiment of the present disclosure, as seen along the longitudinal direction.

[0040] Figure 3a yes Figure 3 A detailed view shows the sealing groove of the filter frame.

[0041] The reference numerals in the attached figures are explained as follows:

[0042] 1. Sealing strip

[0043] 1a First longitudinal end of the sealing strip

[0044] 1b The second longitudinal end of the sealing strip

[0045] 1c Chamber side

[0046] 1d outer side

[0047] L1 extends a vertical line through the lateral center of the distal portion.

[0048] 2. Elongated body

[0049] 3. Base section

[0050] Width of the base portion of W3

[0051] 4. The distal portion of the sealing strip

[0052] 4a Ridge on the distal portion

[0053] 5. The middle part of the sealing strip

[0054] The width of the middle section of W5

[0055] 6. Long reinforcing member

[0056] 7 Filtering Framework

[0057] 7a Planar side of the filter frame

[0058] L7 extends through a vertical line (vertical line) passing through the horizontal center of the bottom part 10.

[0059] 8. Planar opening

[0060] 9. Sealing groove

[0061] 10. Bottom section

[0062] Width of the bottom portion of W10

[0063] 11. Neck section

[0064] W11 Neck width

[0065] D. Distance between the reinforcement and the longitudinal end Detailed Implementation

[0066] According to a first aspect of this disclosure, a sealing strip is provided for sealing adjacent filter plate assemblies in a filter press (e.g., a horizontal filter press, such as a tower press).

[0067] Such horizontal filter presses are typically used for filtering slurries, which are supplied to the filter chambers at a filtration pressure differential of 8-20 bar relative to ambient pressure, typically around 12 bar. To achieve a sufficient seal at the interfaces between adjacent filter frame assemblies, the sealing strips must withstand a linear load of 30-300 N / mm, typically between 100-150 N / mm.

[0068] The sealing strip 1 includes an elongated body 2 extending along the length direction, and has a first longitudinal end 1a and a second longitudinal end 1b.

[0069] The cross-sectional profile of the elongated body 2 includes a base portion 3, which is attached to a corresponding groove 9 in the associated filter frame or filter plate assembly. The cross-sectional profile of the sealing strip 1 also includes a distal portion 4 for sealing against an adjacent filter plate assembly. A ridge 4a is provided on the distal portion 4, which increases the sealing pressure on the distal portion when the sealing strip 1 presses against an adjacent filter plate assembly. The cross-sectional profile of the sealing strip 1 also includes an intermediate portion 5 located between the base portion 3 and the distal portion 4.

[0070] The middle portion 5 has a width W5 defined in a transverse direction that is transverse to and coplanar with the length direction, which is smaller than the width W3 of the base portion 3. In other words, as seen in the longitudinal direction, the cross-sectional profile of the sealing strip 1 is narrower at the middle portion 5 than at the base portion 3.

[0071] The sealing strip 1 also includes an elongated reinforcing member 6 extending at least a portion of the length of the sealing strip 1.

[0072] Moreover, as can be seen along the cross-sectional profile, the reinforcement intersects with line L1, which passes through the ridge 4a and extends in a vertical direction perpendicular to both the length and width directions.

[0073] Moreover, the reinforcing member 6 is encapsulated by the body 2 of the sealing strip 1.

[0074] In one embodiment according to a first aspect of the present disclosure, the reinforcement 6 is longitudinally spaced apart from one or both of the first longitudinal end 1a and the second longitudinal end 1b.

[0075] Preferably, but not necessarily, the reinforcing member 6 is spaced 1 mm to 10 mm apart in the longitudinal direction from one or both of the first longitudinal end 1a and the second longitudinal end 1b.

[0076] In one embodiment according to a first aspect of the present disclosure, the reinforcing member 6 is made of a material with greater stiffness than the body 2 of the sealing strip 1.

[0077] For example, the elastic modulus of the reinforcing member 6 can be at least 100 times the elastic modulus of the body 2. Preferably, but not necessarily, the elastic modulus of the reinforcing member 6 can be at least 500 times the elastic modulus of the body 2. More preferably, but not necessarily, the elastic modulus of the reinforcing member 6 can be at least 1000 times the elastic modulus of the body 2. Most preferably, but not necessarily, the elastic modulus of the reinforcing member 6 can be at least 10000 times the elastic modulus of the body 2. It should be noted that the elastic modulus of the reinforcing member 6 can even be at least 100000 times the elastic modulus of the body 2. It should also be noted that, in addition to the elastic modulus, the geometry of the reinforcing member 6, such as its cross-sectional shape, also affects the stiffness provided by the reinforcing member 6.

[0078] In one embodiment according to a first aspect of the present disclosure, the maximum width of the cross-section of the reinforcing member 6 in the transverse direction is between 10% and 85% of the maximum total width of the cross-section of the sealing strip 1 in the transverse direction.

[0079] Preferably, but not necessarily, the maximum width of the cross-section of the reinforcing member 6 in the transverse direction can be between 30% and 75% of the maximum total width of the cross-section of the sealing strip 1 in the transverse direction.

[0080] More preferably, but not necessarily, the maximum width of the cross-section of the reinforcing member 6 in the transverse direction can be between 50% and 60% of the maximum total width of the cross-section of the sealing strip 1 in the transverse direction.

[0081] Appropriately, the base portion 3 of the sealing strip 1 has the maximum total width of the cross section.

[0082] In one embodiment according to the first aspect of this disclosure, the maximum height of the cross-section of the reinforcing member 6 in the vertical direction is between 10% and 50% of the maximum total height of the cross-section of the sealing strip 1 in the vertical direction.

[0083] Preferably, but not necessarily, the maximum height of the cross-section of the reinforcing member 6 in the vertical direction can be between 12% and 35% of the maximum total height of the cross-section of the sealing strip 1 in the vertical direction.

[0084] More preferably, but not necessarily, the maximum height of the cross-section of the reinforcing member 6 in the vertical direction can be 15%-25% of the maximum total height of the cross-section of the sealing strip 1 in the vertical direction.

[0085] Appropriately, as seen along the cross-sectional profile, the maximum total height of the cross-section is presented at line L1, which passes through the ridge 4a and extends in a vertical direction perpendicular to both the length and width directions.

[0086] In one embodiment according to a first aspect of the present disclosure, the sealing strip 1 is asymmetrical relative to the centerline L1 that extends vertically through the transverse center of the distal portion 4, thereby defining the chamber side 1c and the outer side 1d.

[0087] Preferably, but not necessarily, the centerline L1 passes through the ridge 4a.

[0088] Preferably, but not necessarily, the base portion 3 extends laterally on the chamber side 1c relative to the centerline L1 than on the outer side 1d.

[0089] Preferably, but not necessarily, the middle portion 5 extends laterally on the outer side 1d relative to the center line L1 than on the chamber side 1c.

[0090] Preferably, but not necessarily, the base portion 3 exhibits a greater curvature on the chamber side 1c than on the outer side 1d.

[0091] Preferably, but not necessarily, in the cross-sectional profile of the sealing strip 1, on the chamber side 1c, the curvature of the base portion 3 extends continuously to the middle portion.

[0092] For example, the curvature of the base portion 3 can be transformed into the intermediate portion as a continuous curvature.

[0093] Preferably, but not necessarily, on the outer side 1d, the cross-sectional shape of the base portion 3 presents a linear profile that extends all the way to the middle portion 5.

[0094] It should be noted that the first aspect of this disclosure includes any combination of two or more embodiments or variations thereof as described above.

[0095] According to a second aspect of this disclosure, a filter frame 7 for a filter press (e.g., a horizontal filter press, such as a tower press) is provided. The filter frame 7 defines a boundary forming a laterally closed planar opening 8. It should be noted that the frame 7 itself does not need to be planar. However, the opening 8 should be planar in the sense of having at least one planar boundary (i.e., the opening 8 itself may occupy three-dimensional space). In use, the planar opening 8 forms the lateral wall of the filter chamber. The filter press frame can be provided as a separate frame (which in turn can be an assembly of separate frame portions), or alternatively as an integrated frame portion comprising a filter plate and a plate frame as a combined entity.

[0096] The filter frame 7 includes a sealing groove 9 surrounding a planar opening 8 on its planar side 7a. The sealing groove 9 has a cross-sectional profile including a bottom portion 10 and a neck portion 11 opening between the bottom portion 10 and the planar side 7a of the filter frame 7. The cross-sectional width W11 of the neck portion 11 is smaller than the cross-sectional width W10 of the bottom portion 10. In the context of this disclosure, the width direction of the cross-sectional profile 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, the neck portion 11 is narrower than the bottom portion 10 when viewed along the direction in which the groove extends at a given point.

[0097] In particular, the cross-sectional profile of the sealing groove 9 may be asymmetrical about a vertical line L7 extending through the lateral center point of the bottom portion 10 perpendicular to the planar side 7a, thereby defining the chamber side 1c and the outer side 1d.

[0098] Preferably, but not necessarily, the chamber side 1c of the bottom portion 10 may exhibit a greater curvature than the outer side 1d of the bottom portion 10.

[0099] Preferably, but not necessarily, in the cross-sectional profile of the filter frame 7, on the chamber side 7c, the curvature of the bottom portion 10 extends continuously to the neck portion 11.

[0100] For example, the curvature of the bottom portion 10 can be transferred to the neck portion 11 as a continuous curvature.

[0101] Preferably, but not necessarily, in the cross-sectional profile of the filter frame 7, on the outer side 7d, the bottom portion 10 presents a linear profile that extends all the way to the neck portion 11.

[0102] It should be noted that the second aspect of this disclosure includes any combination of two or more embodiments or variations thereof as described above.

[0103] According to a third aspect of this disclosure, a filter frame assembly is provided for supporting filter plates in a filter press (e.g., a horizontal filter press, such as a tower press).

[0104] The frame assembly includes a filter frame 7 that defines the boundary of a laterally closed planar opening 8. As mentioned above, the filter frame 7 itself does not need to be planar, although the opening 8 should be planar in the sense that it defines at least one planar boundary. That is, the opening 8 may occupy a three-dimensional space defining at least one plane thereon. In use, the planar opening 8 forms the sidewall of the filter chamber. The filter frame 7 is provided as a separate frame (which in turn can be provided as an assembly of separate frame parts), or alternatively as an integrated frame part comprising a recessed plate that is a combined entity of a filter plate and a plate frame.

[0105] The filter frame 7 includes a sealing groove surrounding a planar opening 8 on its planar side 7a. The sealing groove 9 has a cross-sectional profile including a bottom portion 10 and a neck portion 11 that opens between the bottom portion 10 and the planar side 7a of the filter frame 7. Moreover, the cross-sectional width W11 of the neck portion 11 is smaller than the cross-sectional width W10 of the bottom portion 10. That is, in the cross-sectional profile of the frame 7, the neck portion 11 is narrower than the bottom portion 10 when viewed along the direction in which the groove extends at a given point.

[0106] Specifically, the filter plate assembly also includes a sealing strip 1 according to any of the first aspects of this disclosure. The sealing strip 1 is received in a sealing groove 9 such that the bottom portion 10 of the filter frame 7 is shaped-fitted with the base portion 3 of the sealing strip 1, thereby securing the sealing strip 1 to the filter frame 7.

[0107] In one embodiment according to the third aspect of this disclosure, as discussed in conjunction with various embodiments and variations thereof of the first and second aspects of this disclosure, the sealing grooves 9 of the sealing strip 1 and the filter frame 7 are asymmetrical.

[0108] In one embodiment according to the third aspect of this disclosure, as discussed in conjunction with various embodiments and variations thereof of the first and second aspects of this disclosure, both the sealing strip 1 and the sealing groove 9 exhibit greater curvature on the chamber sides 1c, 7c than on the outer sides 1d, 7d.

[0109] In one embodiment according to the third aspect of the present disclosure, as discussed in conjunction with various embodiments and variations thereof of the first and second aspects of the present disclosure, in the cross-sectional profiles of both the sealing strip 1 and the sealing groove 9 of the filter frame 7, on the chamber sides 1c, 7c, the curvature of the base portion and the bottom portion 10 extends continuously to the middle portion 5 and the neck portion 11, respectively.

[0110] In one embodiment according to the third aspect of the present disclosure, as discussed in conjunction with various embodiments and variations thereof of the first and second aspects of the present disclosure, in the cross-sectional profile of the sealing groove 9 of the sealing strip 1 and the filter frame 7, the base portion and the bottom portion 10 on the outer sides 1d and 7d respectively present linear profiles extending to the middle portion 5 and the neck portion 11.

[0111] According to a fourth aspect of this disclosure, a filter press is provided. Preferably, but not necessarily, the filter press is a horizontal filter press, such as a tower press.

[0112] The filter press includes a plurality of filter frame assemblies as described above, according to any embodiment or variation thereof, based on the third aspect of this disclosure. These filter frame assemblies are configured to: move toward each other to a closed position, in which a filter chamber is formed between adjacent filter frame assemblies; and move away from each other to an open position, in which adjacent filter frame assemblies are spaced apart from each other.

[0113] The filter press also includes filter media arranged between adjacent filter frame assemblies.

[0114] The filter press also includes a translation device for moving the filter frame assemblies toward each other to form a filter chamber between adjacent filter frame assemblies, and for moving the filter frame assemblies away from each other to open the filter chamber.

[0115] The filter press also includes a feeding device for supplying slurry into the filter chamber.

[0116] The filter press also includes a recovery device for recovering the filtrate from the filtration chamber.

[0117] The filter press also includes a discharge device for discharging the filter cake formed in the filter chamber.

[0118] Figure 1 A portion of a filter frame assembly according to an embodiment of a fourth aspect of this disclosure is schematically shown in a cross-sectional view along the longitudinal direction. The filter frame assembly includes a filter frame 7 and a sealing strip 1 attached thereto to a planar side 7a of the filter frame 7. The filter frame 7 defines the boundary of a planar opening 8 that forms a laterally closed opening. Figure 1a yes Figure 1 A detailed view shows the sealing groove 9 of the sealing strip 1 and the filter frame 7, which receives the sealing strip 1.

[0119] Figure 2 and Figure 2a Showing more details Figure 1 1. Sealing strip. Figure 2 The schematic diagram shows the cross-sectional profile of sealing strip 1, while Figure 2a A plan view of sealing strip 1 is shown.

[0120] Figure 3 and Figure 3a Showing more details Figure 1 Filtering framework 7. Figure 3 The cross-sectional profile of a portion of the filter frame 7 is shown, while Figure 3a A detailed view of the filter recess 9 of the filter frame 7 is shown.

Claims

1. A sealing strip (1) for sealing adjacent filter plate assemblies of a horizontal filter press, the sealing strip (1) comprising an elongated body (2) extending along a length direction and having a first longitudinal end (1a) and a second longitudinal end (1b), and having a cross-sectional profile comprising: The base portion (3) is attached to a corresponding groove (9) in the associated filter frame or filter plate assembly, the base portion (3) having the maximum total width of the cross section of the sealing strip (1) in the transverse direction; The distal portion (4) is used to seal against an adjacent filter plate assembly, and a ridge (4a) is provided on the distal portion (4) to increase the sealing pressure on the distal portion when the sealing strip presses against the adjacent filter plate assembly; and The middle portion (5) is located between the base portion (3) and the distal portion, wherein the middle portion (5) has a width (W5) defined along a transverse direction that is transverse to and coplanar with the length direction, the width being smaller than the width (W3) of the base portion (3). The sealing strip (1) further includes an elongated reinforcing member (6) extending at least a portion of the length of the sealing strip (1). The reinforcement is positioned at the base portion such that it intersects a line (L1) that passes through the ridge (4a) and extends in a vertical direction perpendicular to both the length and width directions, and wherein the reinforcement (6) is encapsulated by the body (2) of the sealing strip (1), and the reinforcement (6) is longitudinally spaced from one or both of the first longitudinal end (1a) and the second longitudinal end (1b).

2. The sealing strip according to claim 1, wherein, The reinforcing member (6) is spaced 1 mm to 10 mm apart in the longitudinal direction from one or both of the first longitudinal end (1a) and the second longitudinal end (1b) (D).

3. The sealing strip according to claim 1 or 2, wherein, The reinforcing member (6) is made of a material with greater stiffness than the body (2) of the sealing strip (1).

4. The sealing strip according to claim 3, wherein, The elastic modulus of the reinforcing member (6) is at least 100 times that of the elastic modulus of the body (2).

5. The sealing strip according to claim 1 or 2, wherein, The maximum width of the cross-section of the reinforcing member (6) in the transverse direction is between 10% and 85% of the maximum total width of the cross-section of the sealing strip (1) in the transverse direction.

6. The sealing strip according to claim 1 or 2, wherein, The maximum height of the cross-section of the reinforcing member (6) in the vertical direction is between 10% and 50% of the maximum total height of the cross-section of the sealing strip (1) in the vertical direction.

7. The sealing strip according to claim 1 or 2, wherein, The sealing strip (1) is asymmetrical about the centerline (L1) that extends vertically through the transverse center of the distal portion (4), thereby defining the chamber side (1c) and the outer side (1d).

8. The sealing strip (1) according to claim 7, wherein, Relative to the centerline (L1), the base portion (3) extends laterally further on the chamber side (1c) than on the outer side (1d).

9. The sealing strip (1) according to claim 7, wherein, The middle portion (5) extends laterally on the outer side (1d) than on the chamber side (1c) relative to the center line.

10. The sealing strip (1) according to claim 7, wherein, The base portion (3) exhibits a greater curvature on the chamber side (1c) than on the outer side (1d).

11. The sealing strip (1) according to claim 10, wherein, In the cross-sectional profile of the sealing strip (1), on the chamber side (1c), the curvature of the base portion (3) extends continuously to the middle portion (5).

12. The sealing strip (1) according to claim 7, wherein, On the outer side (1d), the cross-sectional shape of the base portion (3) is a linear profile extending to the middle portion (5).

13. A filter frame (7) for a horizontal filter press, the filter frame (7) defining a boundary that forms a laterally closed planar opening (8), the planar opening (8) forming a sidewall of a filter chamber. in, The filter frame (7) has a sealing groove (9) on its planar side (7a) surrounding the planar opening (8). The cross-sectional profile of the sealing groove (9) includes: The bottom part (10), and A neck portion (11) with an opening between the bottom portion (10) and the planar side (7a) of the filter frame (7), wherein the cross-sectional width (W11) of the neck portion (11) is smaller than the cross-sectional width (W10) of the bottom portion (10). The cross-sectional profile of the sealing groove (9) is asymmetrical with respect to the vertical line (L7), which extends perpendicularly to the planar side (7a) and passes through the lateral center point of the bottom portion (10), thereby defining the chamber side (1c) and the outer side (1d). In this embodiment, the sealing strip (1) according to any one of claims 1 to 12 is received in the sealing groove (9) such that the bottom portion (10) of the filter frame (7) is engaged with the base portion (3) of the sealing strip (1) in a shape fit, thereby fixing the sealing strip (1) on the filter frame (7).

14. The filter frame according to claim 13, wherein, The chamber side (1c) of the bottom portion (10) exhibits a greater curvature than the outer side (1d) of the bottom portion (10).

15. The filter frame according to claim 14, wherein, In the cross-sectional profile of the filter frame (7), on the chamber side (1c), the curvature of the bottom portion (10) extends continuously to the neck portion (11).

16. The filter frame according to any one of claims 13 to 15, wherein, In the cross-sectional profile of the filter frame (7), on the outer side (1d), the bottom portion (10) presents a linear profile extending to the neck portion (11).

17. A filter frame assembly for supporting a filter plate of a horizontal filter press, the frame assembly comprising a filter frame (7) defining a boundary that forms a laterally closed planar opening (8). The filter frame (7) includes a sealing groove on its planar side (7a) surrounding the planar opening (8). The cross-sectional profile of the sealing groove (9) includes: The bottom part (10), and A neck portion (11) with an opening between the bottom portion (10) and the planar side (7a) of the filter frame (7), wherein the cross-sectional width (W11) of the neck portion (11) is smaller than the cross-sectional width (W10) of the bottom portion (10). The filter frame assembly further includes a sealing strip according to any one of claims 1 to 12. The sealing strip (1) is received in the sealing groove (9) such that the bottom portion (10) of the filter frame (7) is engaged with the base portion (3) of the sealing strip (1) in a shape fit, thereby fixing the sealing strip (1) to the filter frame (7).

18. The filter frame assembly of claim 17, wherein, It is equipped with a sealing strip (1) according to any one of claims 7-9 and a filter frame according to claim 15.

19. The filter frame assembly according to claim 17 or 18, wherein, It is equipped with a sealing strip (1) as described in claim 1 and a filter frame as described in claim 14.

20. The filter frame assembly according to claim 17 or 18, wherein, It is equipped with a sealing strip (1) as described in claim 11 and a filter frame as described in claim 15.

21. The filter frame assembly according to claim 17 or 18, wherein, It is equipped with a sealing strip (1) as described in claim 12 and a filter frame as described in claim 16.

22. A horizontal filter press, wherein, The filter press includes: Multiple filter frame assemblies according to any one of claims 17 to 21, wherein the filter frame assemblies are configured to move toward each other to a closed position in which a filter chamber is formed between adjacent filter frame assemblies; and to move away from each other to an open position in which adjacent filter frame assemblies are spaced apart from each other. Filter media are arranged between adjacent filter frame assemblies; Translation device for moving the filter frame assemblies toward each other to form a filter chamber between adjacent filter frame assemblies; and for moving the filter frame assemblies away from each other to open the filter chamber; A feeding device for supplying slurry into the filter chamber; Recovery device for recovering filtrate from the filtration chamber, and A discharge device for discharging the filter cake formed in the filter chamber.

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