High pressure filter plate for filter press

Abstract

This application relates to a high-pressure filter plate for a filter press, comprising: a frame plate body with two flexible extrusion plates arranged opposite each other thereon, a filtrate inlet at the center of each flexible extrusion plate, a placement cavity formed between the two flexible extrusion plates and the frame plate body, the placement cavity and the filtrate inlet being sealed by a sealing ring, and a filter water surface located on the outside formed between the flexible extrusion plates and the frame plate body. The application is characterized in that an air bladder is provided inside the sealing ring, the flexible extrusion plates and the sealing ring are elastically deformable, and multiple protrusions are evenly spaced on the filter water surface. This application allows for omnidirectional extrusion of the filtrate, and uniform extrusion avoids uneven compaction of the filter cake due to excessive local pressure, ensuring that water in the filtrate is fully squeezed out and solid particles are effectively retained, thereby reducing the moisture content of the filter cake.

Description

Technical Field

[0001] This application relates to the field of filter press technology, and in particular to a high-pressure filter plate for a filter press. Background Technology

[0002] In industrial production, filter presses are an important solid-liquid separation device that filters and separates various suspensions to obtain solid filter cake and clarified filtrate. Among them, the filter plate is the core component of the filter press, and its performance affects the filtration effect and separation efficiency.

[0003] When existing filter presses use high-pressure filter plates to filter filtrate, especially when filtering impurities such as sludge with high water content in sewage pipes, the compression process between the filter plates is not sufficient, resulting in filter cakes with high water content.

[0004] Specifically, the filtrate is transported between filter plates. External pressure is applied to force the liquid in the filtrate through the filter medium, while solid particles are trapped to form a filter cake. However, the existing sealing method between the flexible extrusion plate and the frame plate body of the filter plate, as well as the overall structural layout, fail to fully consider the uniform distribution of pressure. During the extrusion process, the pressure cannot be applied evenly and fully to the entire filter cake area, resulting in a high water content in the filter cake after filtration.

[0005] To address the aforementioned issues, a high-pressure filter plate for a filter press is now designed. Utility Model Content

[0006] This application provides a high-pressure filter plate for a filter press to solve the problem in related technologies where the compression process between the filter plates is insufficient when filtering sludge and other impurities with high water content in sewage pipes, resulting in a filter cake with high water content.

[0007] In a first aspect, a high-pressure filter plate for a filter press is provided, comprising: The frame plate body has two flexible extrusion plates arranged opposite each other. A filtrate inlet is provided at the center of each flexible extrusion plate. The two flexible extrusion plates and the frame plate body enclose a placement cavity. The placement cavity and the filtrate inlet are sealed by a sealing ring. The flexible extrusion plates and the frame plate body enclose a filter surface located on the outside. The sealing ring is characterized by having an air bladder inside. The flexible extrusion plates and the sealing ring are elastically deformable. Multiple protrusions are evenly spaced on the filter surface. The gaps between the multiple protrusions are connected to form drainage channels. Multiple drainage holes are provided below the flexible extrusion plates.

[0008] In some embodiments, a slope is provided at the connection between the frame plate body and the flexible extrusion sheet.

[0009] In some embodiments, the frame plate body is a rectangular frame-shaped polyvinyl chloride plate, and the flexible extruded sheet and sealing ring are made of nitrile rubber.

[0010] In some embodiments, the airbag is provided with an inflation tube, one end of which extends to the outside of the frame body and is connected to an external air supply device, which is an air compressor, via a flexible hose. An exhaust valve is provided below the outward-extending end of the inflation tube.

[0011] In some embodiments, a drainage cavity communicating with the placement cavity is provided below the frame plate body, and a valve communicating with the drainage cavity is provided at one end of the frame plate body.

[0012] In some embodiments, two handles are provided on opposite sides of the frame plate body.

[0013] In some embodiments, the flexible extrusion sheet is provided with four rectangularly distributed positioning disks, and a plurality of the protrusions are equally distributed around the positioning disks.

[0014] This application provides a high-pressure filter plate for a filter press. Through the cooperation of flexible extrusion plates, sealing rings, filter liquid filter surfaces, and air bladders, the filtrate is subjected to all-round extrusion. Uniform extrusion can avoid uneven compaction of the filter cake due to excessive local pressure, ensuring that the water in the filtrate can be fully squeezed out and the solid particles can be effectively retained, thereby reducing the moisture content of the filter cake.

[0015] In addition, the raised dots and drainage channels on the filter surface increase the roughness of the filter surface, which is conducive to the flow of water and further improves the filtration efficiency and quality, resulting in filter cakes with lower water content and more uniform texture. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this application; Figure 2 A front view provided for an embodiment of this application; Figure 3 A side sectional view provided for an embodiment of this application; Figure 4 This is a front sectional view provided for an embodiment of this application.

[0018] In the diagram: 1. Frame plate body; 2. Flexible extrusion sheet; 21. Filtrate inlet; 3. Placement chamber; 4. Sealing ring; 5. Airbag; 51. Inflation pipe; 52. Exhaust valve; 6. Protrusion; 7. Drainage channel; 8. Drainage hole; 9. Filtration fluid filter surface; 101. Inclined surface; 102. Drainage chamber; 10. Valve; 11. Handle; 12. Positioning plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] This application provides a high-pressure filter plate for a filter press, which can solve the problem in related technologies where the compression process between the filter plates is insufficient when filtering sludge and other impurities with high water content in sewage pipes, resulting in a filter cake with high water content.

[0021] Please see Figures 1-3 A high-pressure filter plate for a filter press includes: a frame plate body 1, on which two flexible extrusion plates 2 are arranged opposite each other, a filtrate inlet 21 is provided at the center of the flexible extrusion plates 2, a placement cavity 3 is formed between the two flexible extrusion plates 2 and the frame plate body 1, the placement cavity 3 and the filtrate inlet 21 are sealed by a sealing ring 4, and a filter surface 9 located on the outside is formed between the flexible extrusion plates 2 and the frame plate body 1. The sealing ring 4 is characterized by having an air bladder 5 inside, the flexible extrusion plates 2 and the sealing ring 4 being elastically deformable, a plurality of protrusions 6 being evenly spaced on the filter surface 9, the gaps between the plurality of protrusions 6 communicating to form a drainage channel 7, and a plurality of drainage holes 8 being provided below the flexible extrusion plates 2.

[0022] After the filter press is started, the filtrate enters the filter fluid filter surface 9 through the filtrate inlet 21 set at the center of the flexible extrusion plate 2.

[0023] Both the flexible extrusion plate 2 and the sealing ring 4 have the characteristic of elastic deformation. During the operation of the filter press, external pressure is applied to the filter plate. When the pressure changes, the air bladder 5 expands, making the contact between the sealing ring 4 and the flexible extrusion plate 2 and the frame plate body 1 more compact.

[0024] As external pressure is continuously applied and the airbag 5 continues to expand, the flexible extrusion plate 2 is pressed against the filter surface 9 under pressure, squeezing the filtrate in the filter surface 9. Due to the elastic deformation characteristics of the flexible extrusion plate 2, the pressure can be evenly transmitted to the filtrate, so that the filtrate is squeezed in all directions and evenly. During the squeezing process, the solid particles in the filtrate are trapped in the placement cavity 3 and gradually form a filter cake.

[0025] The presence of the protrusions 6 increases the roughness of the filter surface 9, which is conducive to the accumulation and flow of water. Then, the accumulated water is initially drained through the drainage channel 7, and finally discharged from the filter plate through multiple drainage holes 8 below the flexible extrusion plate 2, thereby achieving solid-liquid separation.

[0026] The flexible extrusion plate 2, sealing ring 4, filter liquid filter surface 9 and air bag 5 work together to make the filtrate subject to all-round extrusion. The uniform extrusion can avoid uneven compaction of the filter cake due to excessive local pressure, ensure that the water in the filtrate can be fully squeezed out and the solid particles can be effectively retained, thereby reducing the moisture content of the filter cake.

[0027] In addition, the protrusions 6 and drainage channels 7 on the filter surface 9 increase the roughness of the filter surface 9, which is conducive to the flow of water and further improves the filtration efficiency and quality, resulting in a filter cake with lower water content and more uniform texture.

[0028] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, a slope 101 is provided at the connection between the frame plate body 1 and the flexible extrusion sheet 2.

[0029] The inclined surface 101 allows the sealing ring 4 to distribute pressure more evenly when it is pushed by the airbag 5, and to better fit the flexible extrusion sheet 2 and the frame plate body 1 along the inclined surface 101, further enhancing the sealing effect, effectively preventing the filtrate from leaking before filtration, and ensuring that the filtration process is carried out in a closed and stable environment.

[0030] Meanwhile, the inclined surface 101 can guide the flexible extrusion sheet 2 to deform more smoothly during extrusion, making the pressure transmission more uniform and avoiding local stress concentration.

[0031] It should be noted that, in this embodiment, the frame plate body 1 is a rectangular frame-shaped polyvinyl chloride plate, and the flexible extruded sheet 2 and the sealing ring 4 are nitrile rubber.

[0032] The frame plate body 1 is a rectangular frame-shaped polyvinyl chloride (PVC) plate. Polyvinyl chloride (PVC) has excellent chemical stability. During the filtration process, the filtrate may contain various chemical components. The chemical stability of the PVC plate ensures that the frame plate body will not undergo chemical reactions when in contact with different filtrates for a long time, thereby ensuring the structural integrity and service life of the filter plate.

[0033] Meanwhile, the rectangular frame shape increases the structural stability of the frame plate, while the polyvinyl chloride material itself has a certain mechanical strength and can withstand the large pressure generated during the filter press process.

[0034] The flexible extrusion sheet 2 and the sealing ring 4 are made of nitrile rubber. Nitrile rubber has a high elastic modulus and good flexibility, which enables the flexible extrusion sheet to adapt to changes in pressure during the filtration process, uniformly transmit pressure to the filter surface, and improve filtration efficiency.

[0035] like Figure 3 and Figure 4 As shown, in this embodiment, the airbag 5 is provided with an inflation tube 51. One end of the inflation tube 51 extends to the outside of the frame plate body 1 and is connected to an external air supply device through a hose. The air supply device is an air compressor. An exhaust valve 52 is provided below the outwardly extending end of the inflation tube 51.

[0036] The inflation pipe 51 serves as an air transmission channel, introducing compressed air generated by the air compressor into the airbag 5 to provide a power source for the inflation of the airbag 5.

[0037] The function of the exhaust valve 52 is to release the air inside the air bladder 5 when needed, causing the air bladder 5 to contract. When the filter press completes a working cycle, the exhaust valve 52 is opened, and the air inside the air bladder 5 will be released quickly, and the volume of the air bladder 5 will shrink.

[0038] As an air supply device, the air compressor compresses outside air into compressed air with a certain pressure, and delivers it to the air bladder 5 through hoses and inflation pipe 51. The air compressor can flexibly adjust the pressure and flow rate of the output compressed air according to the working requirements of the filter press, thereby controlling the degree of inflation of the air bladder 5. This is existing technology and will not be described in detail here.

[0039] like Figure 3 and Figure 4 As shown, in one embodiment, a drainage cavity 102 communicating with the placement cavity 3 is provided below the frame plate body 1, and a valve 10 communicating with the drainage cavity 102 is provided at one end of the frame plate body 1.

[0040] During the pressure filtration process, the water produced by the pressure filtration flows into the lower part of the placement chamber 3 through the drain hole 8. Utilizing the principle of gravity, the filtrate can naturally flow downward into the drain chamber 102 and then be discharged through the valve 10.

[0041] The connection between the drain chamber 102 and the placement chamber 3 ensures that the filtered water from each location in the placement chamber 3 can flow smoothly into the drain chamber 102, achieving efficient collection of filtered water and preventing filtrate residue in the placement chamber 3.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, two handles 11 are provided opposite to each other on both sides of the frame body 1.

[0043] The handle 11 provides operators with a convenient gripping point, making the handling work easier and safer.

[0044] In addition, during the separation process of the filter press plates, the handles provide a fulcrum for the filter press plates, preventing the push plate mechanism from acting directly on the filter press plates. The handles on both sides act as a buffer, thereby improving the service life of the filter press plates.

[0045] like Figure 1 and Figure 2 As shown, in one embodiment, the flexible extrusion sheet 2 is provided with four rectangularly distributed positioning disks 12, and a plurality of protrusions 6 are equally distributed around the positioning disks 12.

[0046] When multiple filter plates are squeezed by pressure, the positioning disk 12 positions the flexible extrusion plates 2 on both sides to maintain close contact between the multiple filter plates in the initial stage of filtration.

[0047] Meanwhile, the positioning disk 12, acting as a pressure transmission node, can evenly transmit pressure from outside the filter press to the flexible extrusion plate 2. During the filtration process, pressure is applied to the flexible extrusion plate 2 through the positioning disk 12, causing the extrusion plate to deform appropriately, thereby compressing the filter cake and achieving solid-liquid separation. The rectangularly distributed positioning disks 12 ensure the uniformity of pressure transmission and improve the filtration effect.

[0048] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0049] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A high-pressure filter plate for a filter press, characterized in that, include: The frame plate body (1) has two flexible extrusion plates (2) arranged opposite each other. A filtrate inlet (21) is provided at the center of the flexible extrusion plate (2). The two flexible extrusion plates (2) and the frame plate body (1) enclose a placement cavity (3). The placement cavity (3) and the filtrate inlet (21) are sealed by a sealing ring (4). The flexible extrusion plates (2) and the frame plate body (1) enclose a filter surface (9) located on the outside. The sealing ring (4) is characterized by having an air bladder (5) inside. The flexible extrusion plates (2) and the sealing ring (4) are elastically deformable. Multiple protrusions (6) are provided at equal intervals on the filter surface (9). The gaps between the multiple protrusions (6) are connected to form a drainage channel (7). Multiple drainage holes (8) are opened below the flexible extrusion plates (2).

2. The high-pressure filter plate of a filter press as described in claim 1, characterized in that: An inclined surface (101) is provided at the connection between the frame plate body (1) and the flexible extrusion sheet (2).

3. The high-pressure filter plate of a filter press as described in claim 1, characterized in that: The frame body (1) is a rectangular frame-shaped polyvinyl chloride plate, and the flexible extruded sheet (2) and sealing ring (4) are made of nitrile rubber.

4. The high-pressure filter plate of a filter press as described in claim 1, characterized in that: An inflation tube (51) is provided on the airbag (5). One end of the inflation tube (51) extends to the outside of the frame plate body (1) and is connected to an external air supply device through a hose. The air supply device is an air compressor. An exhaust valve (52) is provided below the outwardly extending end of the inflation tube (51).

5. The high-pressure filter plate of a filter press as described in claim 1, characterized in that: The frame plate body (1) has a drainage cavity (102) connected to the placement cavity (3) at the bottom, and a valve (10) connected to the drainage cavity (102) is provided at one end of the frame plate body (1).

6. The high-pressure filter plate of a filter press as described in claim 1, characterized in that: The frame body (1) has two handles (11) on opposite sides.

7. The high-pressure filter plate of a filter press as described in claim 1, characterized in that: The flexible extrusion sheet (2) is provided with four rectangularly distributed positioning disks (12), and multiple protrusions (6) are distributed at equal intervals around the positioning disks (12).

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