Filter pressing assembly compatible with filtering media with different thicknesses and plate-and-frame filter press thereof

Abstract

According to the filter pressing assembly compatible with the filter media with different thicknesses and the plate-and-frame filter press thereof, the peripheries of the flow guide surfaces of a head plate, a tail plate and a middle flow guide plate in the filter pressing assembly are stepped step frames with different heights, and the frame periphery of the bottom step frame is provided with a bottom step groove and is embedded with a bottom step sealing ring; a high-layer step groove is formed in the periphery of the high-layer step frame, and a high-layer step sealing ring is embedded in the high-layer step groove so as to be compatible with conventional or thickened filtering media with different thicknesses, the conventional filtering media are attached to the flow guide face to cover the high-layer step frame, and heightening sealing rings are embedded in flow channel annular grooves of the head plate, the tail plate and the middle flow guide plates; and the thickened filtering medium is attached to the flow guide surface and is limited in the bottom step frame, and conventional sealing rings are embedded in runner ring grooves of the head plate, the tail plate and the middle flow guide plates. The filter pressing assembly overcomes the defects in the prior art, can be compatible with various filtering media with different thickness specifications on one set of filter pressing assembly, expands the application range of the filter pressing assembly, and has substantial characteristics and progress.

Description

Technical Field

[0001] The utility model relates to a filter press assembly and a plate-frame filter press, in particular to a filter press assembly compatible with filter media of different thicknesses and a plate-frame filter press, belonging to the technical field of production and manufacturing of a plate-frame filter press assembly and a corresponding plate-frame filter press. Background Art

[0002] The plate and frame filter press is a device used to separate a solid-liquid mixture to obtain a filter cake formed by the solid matter and a filtrate composed of the liquid and the filtrate in the solid-liquid mixture.

[0003] The core component of the plate and frame filter press that plays the role of solid-liquid separation is the filter press assembly, which is composed of a head plate, a tail plate, multiple filter frames arranged between the head plate and the tail plate, an intermediate guide plate arranged between the filter frames, and filter media located on both sides of each filter frame, etc., which are pressed together.

[0004] A chamber for introducing solid-liquid mixture and accumulating filter cake is provided in the middle of the filter frame. The head plate and the tail plate, each facing one side of the filter frame, and the middle guide plate, each facing the two sides of the filter frame, are provided with guide surfaces consistent with the circumference of the chamber of the filter frame. The filter media are respectively attached to each guide surface. The chamber of the filter frame and the filter media on both sides thereof constitute a filter cavity. The solid-liquid mixture entering the filter cavity penetrates into the filter media on both sides thereof under pressure. The liquid and solid particles with a particle size smaller than the pore size of the filter medium pass through the filter medium into the guide surface to become filtrate, while the solid particles with a particle size larger than the pore size of the filter medium in the solid-liquid mixture are retained in the filter cavity and accumulated to become filter cake.

[0005] The head plate, tail plate, filter frame, intermediate guide plate and filter medium are each provided with feed channels for injecting solid-liquid mixture at the upper and lower ends of one side, and the head plate, tail plate, filter frame, intermediate guide plate and filter medium are each provided with clear liquid channels for filtrate outflow at the upper and lower ends of the other side, and each filter frame is provided with a feed hole connected to the feed channel on its chamber, and the head plate, tail plate and each intermediate guide plate are respectively provided with clear liquid collection holes connected to the clear liquid channel on their guide surfaces.

[0006] Usually, the outer periphery of the guide surface of the head plate, the tail plate, and the middle guide plate is also provided with a sealing groove and a sealing ring embedded therein to prevent the solid-liquid mixture or the filtrate from seeping out from the plate gaps during the filtration process.

[0007] A plate and frame filter press usually includes a frame, a clamping mechanism and a filter press assembly. The frame is a horizontal frame member composed of two load-bearing support rods and a front fixed end plate and a rear fixed end plate. The clamping mechanism is composed of a cylinder and a movable clamping plate, wherein the cylinder is arranged on the rear fixed end plate, the movable clamping plate is arranged on one side of the tail plate of the filter press assembly and is connected to the top rod of the cylinder, the filter press assembly is arranged between the front fixed end plate and the movable clamping plate and can be tightly fitted with the front fixed end plate through the push of the movable clamping plate under the action of the cylinder. For the convenience of installation, the various plates and frames that constitute the filter press assembly are usually symmetrically provided with handles on the left and right sides of their respective exteriors for sliding them onto the load-bearing support rods.

[0008] Filter media refers to porous materials that allow working media such as the above-mentioned solid-liquid mixture to pass through and can intercept solid particles or liquid droplets therein to achieve the purpose of separation or purification. It is a key component of the filter, which determines the separation accuracy and efficiency of the filtering operation, and also directly affects the production intensity and power consumption of the filter.

[0009] Commonly used filter media in industry include woven or pressed materials such as filter cloth, filter paper or filter screen made of natural or synthetic fibers, metal wires, etc., as well as porous solid materials and stacked media. Since the filter media used on plate and frame filter presses are usually materials such as filter cloth or filter paper, unless otherwise specified, the filter media used in the filter press assembly of the plate and frame filter press is filter cloth or filter paper.

[0010] Indicators for examining filter media performance usually include:

[0011] The solid particle capture capacity, permeability reflecting the filtrate flow resistance, slag unloading and cleaning regeneration performance reflecting the difficulty of filter cake removal and cleaning, as well as its chemical stability and mechanical strength. For plate and frame filter press, the thickness of filter cloth or filter paper reflects its solid particle capture capacity, permeability and mechanical strength. Generally speaking, the thickness of filter cloth or filter paper is proportional to the solid particle capture capacity and mechanical strength, and inversely proportional to the permeability.

[0012] Since the solid-liquid separation operation of the plate and frame filter press is carried out under pressurized conditions, the various components that make up the filter press assembly need to be tightly fitted to each other through the push of the movable pressing plate under the action of the oil cylinder to prevent the solid-liquid mixture or filtrate from seeping out from the plate gaps during the filtration process.

[0013] In order to ensure that the head plate, the tail plate, and the middle guide plate can fit tightly and be pressed against the filter frame, generally speaking, a set of filter press components can only be suitable for filter media within a certain specific thickness range and cannot be compatible with filter media with greatly different thicknesses, because the sealing grooves provided on the periphery of the guide surfaces of the head plate, the tail plate, and the middle guide plate and the embedded sealing rings have heights that can only correspond to filter media within a certain specific thickness range. Filter media with greatly different thicknesses cannot be matched with the sealing grooves provided on the periphery of the guide surfaces of the head plate, the tail plate, and the middle guide plate and the embedded sealing rings, which will cause the filter press components to be unable to be tightly compacted and sealed, thereby causing solid-liquid mixtures or filtrate to seep out from the plate seams during the filtration process, resulting in contamination and loss of the filter material, and failure to complete the solid-liquid separation.

[0014] In the production or development of biological products, due to process and other reasons, the plate and frame filter press used must sometimes use two types of filter media with thickness specifications of 3.2-3.7mm and 1.2-1.5mm for solid-liquid separation respectively. In this case, one specification of plate and frame filter press cannot meet all its process requirements, and plate and frame filter presses that are suitable for two thickness specifications of filter media must be equipped to meet its filtration needs, thereby increasing production or development costs. Utility Model Content

[0015] In order to overcome the shortcomings of the prior art and meet the needs of completing the filtration operation of two filter media with different thickness specifications, the utility model specially provides a filter press assembly compatible with filter media of different thicknesses and a plate and frame filter press thereof, so as to meet the needs of using filter media of different thicknesses for filtration on the same plate and frame filter press.

[0016] To achieve the above purpose, the utility model first provides a filter press assembly compatible with filter media of different thicknesses, which specifically includes the following technical solutions:

[0017] A filter press assembly compatible with filter media of different thicknesses, used for solid-liquid separation of a solid-liquid mixture to obtain a filter cake formed by solid matter therein and a filtrate composed of liquid and filtrate therein, comprising a head plate, a tail plate, a plurality of filter frames arranged between the head plate and the tail plate, an intermediate guide plate arranged between the filter frames, and filter media on both sides of the filter frames, wherein the center of the filter frame is provided with a chamber for introducing the solid-liquid mixture and accumulating the filter cake, and the head plate, the tail plate and the intermediate guide plate are respectively provided with concave guide holes which are consistent with the circumference of the chamber on their sides facing the filter frame The filter medium is respectively attached to each of the guide surfaces and forms a filter cavity with the filter frame and its chamber. The upper and lower ends of each side of the head plate, the tail plate, the filter frame, the intermediate guide plate and the filter medium are provided with a feed flow channel for the injection of the solid-liquid mixture, and the upper and lower ends of each other side are provided with a clear liquid flow channel for the filtrate to flow out. Each filter frame is also provided with a feed hole connected to the feed flow channel on its chamber. The head plate, the tail plate and each of the intermediate guide plates are provided with a clear liquid collection hole connected to their respective clear liquid flow channels on their respective guide surfaces, wherein:

[0018] The filter medium is a conventional filter medium or a thickened filter medium, and the thickness of the thickened filter medium is 2.0 to 3.0 times the thickness of the conventional filter medium; the outer periphery of the guide surface of the head plate, the tail plate and each of the intermediate guide plates is a stepped step frame, wherein the one close to the guide surface is a bottom step frame, and the one away from the guide surface is a high-level step frame, and the height of the high-level step frame is 2.0 to 3.0 times the height of the bottom step frame, and the bottom step frame is also provided with a bottom step groove on the frame periphery, and a bottom step sealing ring is embedded in the bottom step groove, and a high-level step groove is provided on the frame periphery of the high-level step frame, and a high-level step sealing ring is embedded in the high-level step groove;

[0019] The outer periphery of the feed flow channels of the head plate, the tail plate, the filter frame and each of the intermediate guide plates is also provided with flow channel annular grooves, wherein the flow channel annular grooves of the filter frame are embedded with conventional sealing rings, and the flow channel annular grooves of the head plate, the tail plate and each of the intermediate guide plates are embedded with conventional sealing rings or heightened sealing rings;

[0020] When the conventional sealing ring is in the flow channel annular groove of the head plate, the tail plate and each of the intermediate guide plates, the height thereof is consistent with the height of the bottom step sealing ring exposed from the bottom step groove;

[0021] When the head plate, the tail plate and each of the intermediate guide plates have the heightened sealing ring in their respective flow channel annular grooves, their height is consistent with the height of the high-level step sealing ring exposed in the high-level step groove;

[0022] When the filter medium is a conventional filter medium, the conventional filter medium is attached to the guide surface and covers the high-level step frame, and the heightened sealing ring is embedded in the respective flow channel annular grooves of the head plate, the tail plate and each of the intermediate guide plates;

[0023] When the filter medium is a thickened filter medium, the thickened filter medium is attached to the guide surface and confined in the bottom step frame, and the conventional sealing rings are embedded in the flow channel annular grooves of the head plate, the tail plate and each of the intermediate guide plates.

[0024] Optionally, the filter medium is filter cloth or filter paper, the conventional filter medium has a thickness of 1.2 to 1.5 mm, and the thickened filter medium has a thickness of 3.2 to 3.7 mm.

[0025] Furthermore, the guide surface is provided with guide strips or protrusions therein, and the guide strips or protrusions are used to support the filter medium attached to the guide surface.

[0026] Furthermore, the height of the guide strip or the protrusion is consistent with the height of the bottom step frame.

[0027] Optionally, the filter frame has a plurality of feed holes, and the plurality of feed holes are respectively connected to the chamber in a radial pattern with the feed channel as the center.

[0028] Optionally, the head plate, the tail plate and each of the intermediate guide plates have a plurality of clear liquid collecting holes on their respective guide surfaces, and the plurality of clear liquid collecting holes are radially connected to their respective guide surfaces.

[0029] Furthermore, exhaust holes are respectively provided on the frame of the filter frame, and on the outer sides of the guide surfaces of the head plate, the tail plate and the intermediate guide plate. The exhaust holes are used for exhausting air when the head plate, the tail plate, the filter frame and the intermediate guide plate are immersed in the cleaning liquid for soaking cleaning.

[0030] Furthermore, the utility model also provides a plate-frame filter press, which specifically includes the following technical solutions:

[0031] A plate-and-frame filter press, used for solid-liquid separation of a solid-liquid mixture, comprises a frame and a clamping mechanism, wherein the frame is a horizontal frame member composed of two load-bearing support rods and a front fixed plate and a rear fixed plate, the clamping mechanism is composed of a cylinder and a movable clamping plate, the cylinder is arranged on the rear fixed plate, the movable clamping plate is arranged on one side of the rear fixed plate and connected to the top rod of the cylinder, and further comprises any one of the above filter press components, wherein:

[0032] The filter press assembly is arranged between the front fixing plate and the movable pressing plate and can be closely fitted with the front fixing plate through the pushing of the movable pressing plate under the action of the oil cylinder.

[0033] Furthermore, the plate and frame filter press also includes a partition plate with the same shape and size as the tail plate constituting the filter press assembly. The partition plate is arranged on the load-bearing support rod between the movable pressure plate and the tail plate, and is used to fill the gap formed between the movable pressure plate and the tail plate of the filter press assembly after the cylinder's push rod is pushed out.

[0034] Furthermore, the head plate, the tail plate, the filter frame, the intermediate guide plate, and the partition plate that constitute the filter press assembly are symmetrically provided with handles on the left and right sides of their respective exteriors for slidably placing them on the load-bearing support rods of the frame.

[0035] Compared with the prior art, the beneficial effects and improvements of the utility model are:

[0036] In the filter press assembly and plate-frame filter press compatible with filter media of different thicknesses provided by the utility model, the outer periphery of the guide surface of the head plate, the tail plate and the middle guide plate in the filter press assembly is a stepped step frame, wherein the one close to the guide surface is a bottom step frame, and the one far away from the guide surface is a high-level step frame, and the height difference between the high-level step frame and the bottom-level step frame is 2.0 to 3.0 times, and the bottom-level step frame is also provided with a bottom-level step groove on the frame periphery and embedded with a bottom-level step sealing ring, and the high-level step frame is provided with a high-level step groove on the frame periphery and embedded with a high-level step sealing ring;

[0037] The filter press assembly compatible with filter media of different thicknesses provided by the utility model can be compatible with conventional filter media or thickened filter media, wherein the thickness of the thickened filter media is 2.0 to 3.0 times the thickness of the conventional filter media;

[0038] When the filter medium is a conventional filter medium, the conventional filter medium is attached to the guide surface and covers the high-level step frame, and the head plate, the tail plate and each intermediate guide plate have their respective flow channel annular grooves embedded with heightened sealing rings;

[0039] When the filter medium is a thickened filter medium, the thickened filter medium is attached to the guide surface and confined in the bottom step frame, while the head plate, the tail plate and each intermediate guide plate have conventional sealing rings embedded in their respective flow channel annular grooves;

[0040] The filter press assembly provided by the utility model overcomes the shortcomings of the prior art, can use a set of filter press assembly to meet the filter press operation that requires a variety of filter media with different thicknesses and specifications, expands the application range of the filter press assembly, can save equipment costs in production or scientific research, achieves technical effects that cannot be achieved by the prior art, and has substantial characteristics and progress;

[0041] On this basis, the plate-and-frame filter press provided by the utility model, which is developed based on the filter press assembly that is compatible with filter media of different thicknesses, can meet the filter press operation needs of filter media of various thicknesses and specifications, expand its application range, save equipment costs for production enterprises or research and development units, and meet the solid-liquid separation needs of various products, and achieve technical effects that cannot be achieved by existing technologies, and has substantial characteristics and progress, as well as broad market prospects;

[0042] The filter press assembly and plate-frame filter press compatible with filter media of different thicknesses provided by the utility model have simple structure, convenient manufacture, good adaptability, and can achieve substantial technical effects. Therefore, they are of great promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solution of the present utility model, a brief introduction to the drawings required for the embodiments of the present utility model is given below.

[0044] Obviously:

[0045] The drawings described below are only drawings of some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, but these other drawings also belong to the drawings required for use in the embodiments of the utility model.

[0046] Figure 1 A schematic diagram of a three-dimensional exploded structure of components of a filter press assembly compatible with filter media of different thicknesses provided by an embodiment of the utility model;

[0047] Figure 2 A schematic diagram of the structure of a filter frame of a filter press assembly compatible with filter media of different thicknesses provided in an embodiment of the utility model;

[0048] Figure 3 A schematic structural diagram of a filter press assembly compatible with filter media of different thicknesses provided by an embodiment of the utility model, wherein the head plate, the tail plate and the middle guide plate each face the side of the filter frame;

[0049] Figure 4 A schematic cross-sectional structure diagram of a filter press assembly compatible with filter media of different thicknesses provided by an embodiment of the utility model when the filter medium is a conventional filter medium;

[0050] Figure 5 A schematic cross-sectional structure diagram of a filter press assembly compatible with filter media of different thicknesses provided by an embodiment of the utility model when the filter medium is a thickened filter medium;

[0051] Figure 6 The present invention provides a three-dimensional structural schematic diagram of a plate and frame filter press according to an embodiment of the present invention.

[0052] In the figure:

[0053] 100-filter press assembly, 110-head plate, 120-tail plate, 130-filter frame, 131-chamber, 132-feed hole, 140-middle guide plate, 150a-conventional filter medium, 150b-thickened filter medium;

[0054] 101- flow guide surface, 101a- flow guide strip, 101b- exhaust hole, 102- feed flow channel, 103- clear liquid flow channel, 104- clear liquid collection hole, 105- bottom step frame, 105a- bottom step sealing ring, 106- high-level step frame, 106a- high-level step sealing ring, 107- flow channel annular groove, 107a- conventional sealing ring, 107b- heightened sealing ring;

[0055] 210- load-bearing support rod, 220- front fixing plate, 230- rear fixing plate, 310- oil cylinder, 320- movable pressing plate, 400- partition plate, 500- handle. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution, beneficial effects and significant progress of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the drawings provided for the embodiments of the utility model. Obviously, all the described embodiments are only partial embodiments of the utility model, rather than all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0057] It should be noted that the term "comprising" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusions, for example, not only including a series of listed technical features and structural components, but also optionally including unlisted technical features and structural components, or optionally including the connection relationship between these technical features and structural components.

[0058] It should be understood that in the description of the embodiments of the present invention, terms such as "upper", "lower", "one side", "the other side" and other indicative orientation or position words are only based on the orientation or position relationship shown in the drawings of the embodiments of the present invention. They are for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element must have a specific orientation, specific orientation structure and operation. Therefore, they cannot be understood as limitations on the present invention.

[0059] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "disposed", "provided with", etc. should be understood in a broad sense. For example, it can be a fixed setting, a detachable movable setting, or a fixed connection relationship that becomes one. The connection can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two structural elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0060] It should also be noted that:

[0061] The following specific embodiments may be combined with each other, and the same or similar concepts or processes therein may not be described in detail in some embodiments.

[0062] The technical solution of the present utility model is described in detail below with specific embodiments.

[0063] Example 1

[0064] This embodiment provides a filter medium compatible with different thicknesses for use in solid-liquid mixtures, wherein the solid-liquid separation obtains a filter cake formed by corresponding solids and a filtrate composed of liquid and filtrate in the solid-liquid mixture.

[0065] like Figure 1 A three-dimensional decomposition structure diagram of the components of a filter press assembly compatible with filter media of different thicknesses provided by the embodiment of the utility model is shown as follows:

[0066] A filter press assembly 100 compatible with filter media of different thicknesses includes a head plate 110, a tail plate 120, a plurality of filter frames 130 disposed between the head plate 110 and the tail plate 120, an intermediate guide plate 140 disposed between the filter frames 130, and filter media on both sides of the filter frames 130 (not shown in the figure).

[0067] like Figure 2 A schematic diagram of the structure of a filter frame of a filter press assembly compatible with filter media of different thicknesses provided in an embodiment of the utility model, Figure 3A filter press assembly compatible with filter media of different thicknesses provided by the present utility model is shown in a schematic structural diagram of a head plate, a tail plate and an intermediate guide plate facing the side of the filter frame:

[0068] The filter frame 130 has a chamber 131 in the middle thereof for introducing the solid-liquid mixture and accumulating the filter cake;

[0069] The head plate 110, the tail plate 120 and the middle guide plate 140 are respectively provided with a concave guide surface 101 which is consistent with the circumference of the chamber 131 on the side facing the filter frame 130. The filter medium (not shown in the figure) is respectively attached to each guide surface 101 and forms a filter cavity with the chamber 131 of the filter frame 130. The head plate 110, the tail plate 120, the filter frame 130, the middle guide plate 140 and the filter medium (not shown in the figure) are respectively provided with a concave guide surface 101 which is consistent with the circumference of the chamber 131. The lower two ends are provided with feed channels 102 for injecting solid-liquid mixture, and the upper and lower ends on the other side are provided with clear liquid channels 103 for outflow of filtrate. Each filter frame 130 is also provided with a feed hole 132 connected to the feed channel 102 on its chamber 131. The head plate 110, the tail plate 120 and each intermediate guide plate 140 are respectively provided with clear liquid collection holes 104 connected to their respective clear liquid channels 103 on their respective guide surfaces 101.

[0070] like Figure 4 A schematic cross-sectional structure diagram of a filter press assembly compatible with filter media of different thicknesses provided by an embodiment of the utility model when the filter medium is a conventional filter medium, as shown in FIG. Figure 5 A cross-sectional structural schematic diagram of a filter press assembly compatible with filter media of different thicknesses provided by an embodiment of the utility model when the filter medium is a thickened filter medium is shown as follows:

[0071] The filter medium may be a conventional filter medium 150a or a thickened filter medium 150b, wherein the thickness of the thickened filter medium 150b is 2.0 to 3.0 times the thickness of the conventional filter medium 150a;

[0072] The outer periphery of the guide surface 101 of the head plate 110, the tail plate 120 and each intermediate guide plate 140 is a stepped step frame, wherein the lower step frame 105 is close to the guide surface 101, and the upper step frame 106 is far away from the guide surface 101. The height of the upper step frame 106 is 2.0 to 3.0 times the height of the lower step frame 105. The lower step frame 105 is also provided with a lower step sealing groove on its periphery, and a lower step sealing ring 105a is embedded in the lower step sealing groove. The upper step frame 106 is provided with a higher step groove on its periphery, and a higher step sealing ring 106a is embedded in the higher step groove.

[0073] The feed flow channels 102 of the head plate 110, the tail plate 120, the filter frame 130 and each intermediate guide plate 140 are respectively provided with flow channel annular grooves 107 on their outer peripheries, wherein a conventional sealing ring 107a is embedded in the flow channel annular groove 107 of the filter frame 130, and a conventional sealing ring 107a or a heightened sealing ring 107b is embedded in the flow channel annular grooves 107 of the head plate 110, the tail plate 120 and each intermediate guide plate 140;

[0074] When the head plate 110, the tail plate 120 and each intermediate guide plate 140 have a conventional sealing ring 107a in their respective flow channel annular grooves 107, their height is consistent with the height of the bottom step sealing ring 105a exposed in the bottom step sealing groove;

[0075] When the head plate 110, the tail plate 120 and each intermediate guide plate 140 have a heightened sealing ring 107b in their respective flow channel annular grooves 107, their height is consistent with the height of the high-level step sealing ring 106a exposed in the high-level step groove;

[0076] When the filter medium is a conventional filter medium 150a, the conventional filter medium 150a is attached to the guide surface 101 and covers the high-level step frame 106, and the head plate 110, the tail plate 120 and each intermediate guide plate 140 have a heightened sealing ring 107b embedded in their respective flow channel annular grooves 107;

[0077] When the filter medium is a thickened filter medium 150b, the thickened filter medium 150b is attached to the guide surface 101 and confined in the bottom step frame 105, and conventional sealing rings 107a are embedded in the flow channel annular grooves 107 of the head plate 110, the tail plate 120 and each intermediate guide plate 140.

[0078] From the above description, we can see that:

[0079] In the filter press assembly compatible with filter media of different thicknesses provided in this embodiment, the outer periphery of the guide surface of the head plate, the tail plate and the middle guide plate is a stepped step frame, wherein the one close to the guide surface is a bottom step frame, and the one far away from the guide surface is a high-level step frame, and the height difference between the high-level step frame and the bottom-level step frame is 2.0 to 3.0 times, and the bottom-level step frame is also provided with a bottom-level step groove on the frame periphery and embedded with a bottom-level step sealing ring, and the high-level step frame is provided with a high-level step groove on the frame periphery and embedded with a high-level step sealing ring; and

[0080] The filter press assembly in this embodiment is compatible with conventional filter media or thickened filter media, wherein the thickness of the thickened filter media is 2.0 to 3.0 times the thickness of the conventional filter media;

[0081] When the filter medium is a conventional filter medium, the conventional filter medium is attached to the guide surface and covers the high-level step frame, and the head plate, the tail plate and each intermediate guide plate have their respective flow channel annular grooves embedded with heightened sealing rings;

[0082] When the filter medium is a thickened filter medium, the thickened filter medium is attached to the guide surface and confined in the bottom step frame, while the head plate, the tail plate and each intermediate guide plate have conventional sealing rings embedded in their respective flow channel annular grooves;

[0083] Obviously, the filter press assembly provided in this embodiment overcomes the shortcomings of the prior art and can use one set of filter press assemblies to meet the filter press operations that require filter media with different thickness specifications, thereby expanding the application scope of the filter press assembly, saving equipment costs in production or scientific research, and achieving technical effects that cannot be achieved by the prior art, and has substantial characteristics and progress.

[0084] Optionally, in the filter press assembly provided in this embodiment, the filter medium can be filter cloth or filter paper, the thickness of the conventional filter medium 150a can range from 1.2 to 1.5 mm, and the thickness of the thickened filter medium 150b can range from 3.2 to 3.7 mm. It can be seen that the filter press assembly provided in this embodiment has strong adaptability and can meet the use requirements of filter media of different materials and different thicknesses.

[0085] Further, from Figure 3 or Figure 4 , Figure 5 You can see:

[0086] In the filter press assembly provided in this embodiment, the guide surface 101 of each assembly is further provided with a guide strip 101a or a protrusion (not shown in the figure) therein, and the guide strip 101a or the protrusion (not shown in the figure) is used to support the filter medium attached to the guide surface 101, so that the filtrate can pass through better and the filter press efficiency is improved.

[0087] Furthermore, the height of the guide bar 101 a or the protrusion (not shown in the figure) is consistent with the height of the bottom step frame 105 .

[0088] Optional, from Figure 2 In the , you can see:

[0089] In the filter press assembly provided in this embodiment, the filter frame 130 has a plurality of feed holes 132, and the plurality of feed holes 132 are radially connected to the chamber 131 with the feed channel 102 as the center, thereby accelerating the feed speed and improving the filter press efficiency.

[0090] Optional, from Figure 3 In the , you can also see:

[0091] In the filter press assembly provided in this embodiment, a plurality of clear liquid collecting holes 104 are provided on the guide surfaces 101 of the head plate 110, the tail plate 120 and each intermediate guide plate 140, and the plurality of clear liquid collecting holes 104 are radially connected to their respective guide surfaces 101. Obviously, such a design can guide the filtrate better and more quickly, thereby improving the filter press efficiency.

[0092] Further, from Figure 2 , Figure 3 or Figure 4 , Figure 5 In the , you can also see:

[0093] In the filter press assembly provided in the present embodiment, exhaust holes 101b are respectively provided on the frame of the filter frame 130 and the outer sides of the guide surfaces 101 of the head plate 110, the tail plate 120 and the intermediate guide plate 140. The exhaust holes 101b are used for exhausting air when the head plate 110, the tail plate 120, the filter frame 130 and the intermediate guide plate 140 are each immersed in the cleaning liquid for immersion cleaning. In this way, the various components in the filter press assembly can be cleaned better and more conveniently, thereby improving production efficiency.

[0094] Example 2

[0095] This embodiment provides a plate and frame filter press prepared based on any one of the filter press components in the above-mentioned embodiment 1.

[0096] like Figure 6 A three-dimensional structural diagram of a plate-frame filter press provided by an embodiment of the utility model is shown as follows:

[0097] A plate-and-frame filter press includes a frame and a clamping mechanism. The frame is a horizontal frame member composed of two load-bearing support rods 210, a front fixing plate 220 and a rear fixing plate 230. The clamping mechanism consists of an oil cylinder 310 and a movable clamping plate 320. The oil cylinder 310 is arranged on the rear fixing plate 230. The movable clamping plate 320 is arranged on one side of the rear fixing plate 230 and is connected to the top rod of the oil cylinder 310. In addition:

[0098] It also includes any one of the filter press assemblies 100 provided in the above-mentioned embodiment 1 that is compatible with filter media of different thicknesses, wherein the filter press assembly 100 is arranged between the front fixed plate 220 and the movable clamping plate 320 and can be tightly fitted with the front fixed plate 220 through the pushing of the movable clamping plate 320 under the action of the cylinder 310.

[0099] From the above description, we can see that:

[0100] The plate and frame filter press provided in this embodiment is developed based on the filter press assembly provided in the above-mentioned embodiment 1 that is compatible with filter media of different thicknesses. It can meet the filter press operation needs of filter media of various thicknesses and specifications, expands the scope of application, can save equipment costs for production enterprises or research and development units, and meet the solid-liquid separation needs of various products. It has achieved technical effects that cannot be achieved by existing technologies. Therefore, it has substantial characteristics and progress as well as broad market prospects.

[0101] Further, such as Figure 6 As shown:

[0102] The plate and frame filter press provided in this embodiment also includes a partition plate 400 which has exactly the same shape and size as the tail plate 120 constituting the filter press assembly 100. The partition plate 400 is arranged on the load-bearing support rod 210 between the movable clamping plate 320 and the tail plate 120, and is used to fill the gap formed between the movable clamping plate 320 and the tail plate 120 of the clamped filter press assembly 100 after the push rod of the oil cylinder 310 is pushed out.

[0103] Obviously, by setting the partition plate, the operation and use of the plate and frame filter press provided in this embodiment can be more convenient and flexible, because the filter frame and the intermediate guide plate in the filter press assembly can be flexibly increased or decreased according to the amount of solid-liquid mixture and the separation requirements, and the gap between the tail plate and the movable clamping plate of the filter press assembly can be adjusted by the partition plate, thereby meeting the clamping needs of the filter press assembly and successfully completing the filter press operation.

[0104] Furthermore, in the plate and frame filter press provided in the present embodiment, the head plate 110, the tail plate 120, the filter frame 130, the intermediate guide plate 140, and the partition plate 400 constituting the filter press assembly 100 are symmetrically provided with handles 500 on the left and right sides of their respective exteriors for slidably placing them on the load-bearing support rods 210 of the frame, so as to facilitate assembly and disassembly.

[0105] It can be seen that:

[0106] The plate and frame filter press provided in this embodiment is developed based on the filter press assembly provided in the above-mentioned embodiment 1 that is compatible with filter media of different thicknesses. It can meet the filter press operation needs of filter media of various thicknesses and specifications, expand its application range, save equipment costs for production enterprises or research and development units, and meet the solid-liquid separation needs of various products. It has achieved technical effects that cannot be achieved by existing technologies, and has substantial characteristics and progress as well as broad market prospects.

[0107] In summary, we can see that:

[0108] The filter press assembly and the plate and frame filter press provided by the utility model overcome the deficiency of the prior art that only a filter medium of a certain thickness can be used for liquid-solid separation, and can satisfy the filter press operation that requires filter media of various thicknesses and specifications on a set of filter press assembly, thereby expanding its application scope, being able to save equipment investment in production or scientific research, and achieving technical effects that cannot be achieved by the prior art. In addition, the filter press assembly and the plate and frame filter press compatible with filter media of different thicknesses provided by the utility model have a simple structure, are easy to manufacture, and have good adaptability, and can achieve substantial technical effects. Therefore, they are extremely valuable for promotion and application.

[0109] In the description of the above manual:

[0110] The descriptions of terms such as "this embodiment", "an embodiment of the utility model", "as shown in...", "further", etc., mean that the specific features, structures, materials or characteristics described in the embodiment are included in at least one embodiment of the utility model. In this specification, the schematic expressions of the above terms are not necessarily for the same embodiment, and the specific features, structures, materials or characteristics described may be combined or combined in a suitable manner in any one or more embodiments; in addition, under the premise that no contradiction arises, a person of ordinary skill in the art may combine or combine the different embodiments and features of different embodiments described in this specification.

[0111] Finally, it should be noted that:

[0112] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions described in the embodiments of the present invention. The non-essential improvements, adjustments or replacements made by those skilled in the art based on the contents recorded in this specification are all within the scope of protection required by the present invention.

Claims

1. A filter press assembly compatible with filter media of different thicknesses, used for solid-liquid separation of a solid-liquid mixture to obtain a filter cake formed by solid matter and a filtrate composed of liquid and filtrate, comprising a head plate, a tail plate, a plurality of filter frames arranged between the head plate and the tail plate, an intermediate guide plate arranged between the filter frames, and filter media on both sides of the filter frames, wherein the center of the filter frame is provided with a chamber for introducing the solid-liquid mixture and accumulating the filter cake, and the head plate, the tail plate and the intermediate guide plate are respectively provided with concave guide holes which are consistent with the circumference of the chamber on the sides facing the filter frame The filter medium is respectively attached to each of the guide surfaces and forms a filter cavity with the filter frame and its chamber. The upper and lower ends of each side of the head plate, the tail plate, the filter frame, the intermediate guide plate and the filter medium are provided with a feed flow channel for the injection of the solid-liquid mixture, and the upper and lower ends of each other side are provided with a clear liquid flow channel for the filtrate to flow out. Each filter frame is also provided with a feed hole connected to the feed flow channel on its chamber. The head plate, the tail plate and each of the intermediate guide plates are provided with a clear liquid collection hole connected to their respective clear liquid flow channels on their respective guide surfaces. It is characterized in that: The filter medium is a conventional filter medium or a thickened filter medium, and the thickness of the thickened filter medium is 2.5 to 3.0 times the thickness of the conventional filter medium; The outer periphery of the guide surface of each of the head plate, the tail plate and the intermediate guide plates is a stepped step frame, wherein the one close to the guide surface is a bottom step frame, and the one far away from the guide surface is a high-level step frame, the height of the high-level step frame is 2.5 to 3.0 times the height of the bottom step frame, and the bottom step frame is also provided with a bottom step groove on the periphery of the frame, a bottom step sealing ring is embedded in the bottom step groove, and a high-level step groove is provided on the periphery of the frame of the high-level step frame, and a high-level step sealing ring is embedded in the high-level step groove; The outer periphery of the feed flow channels of the head plate, the tail plate, the filter frame and each of the intermediate guide plates is also provided with flow channel annular grooves, wherein the flow channel annular grooves of the filter frame are embedded with conventional sealing rings, and the flow channel annular grooves of the head plate, the tail plate and each of the intermediate guide plates are embedded with conventional sealing rings or heightened sealing rings; When the conventional sealing ring is in the flow channel annular groove of the head plate, the tail plate and each of the intermediate guide plates, the height thereof is consistent with the height of the bottom step sealing ring exposed from the bottom step groove; When the head plate, the tail plate and each of the intermediate guide plates have the heightened sealing ring in their respective flow channel annular grooves, their height is consistent with the height of the high-level step sealing ring exposed in the high-level step groove; When the filter medium is a conventional filter medium, the conventional filter medium is attached to the guide surface and covers the high-level step frame, and the heightened sealing ring is embedded in the respective flow channel annular grooves of the head plate, the tail plate and each of the intermediate guide plates; When the filter medium is a thickened filter medium, the thickened filter medium is attached to the guide surface and confined in the bottom step frame, and the conventional sealing rings are embedded in the flow channel annular grooves of the head plate, the tail plate and each of the intermediate guide plates.

2. The filter press assembly according to claim 1, characterized in that: The filter medium is filter cloth or filter paper, the conventional filter medium has a thickness of 1.2 to 1.5 mm, and the thickened filter medium has a thickness of 3.2 to 3.7 mm.

3. The filter press assembly according to claim 1, characterized in that: The guide surface is provided with guide strips or protrusions inside, and the guide strips or protrusions are used to support the filter medium attached to the guide surface.

4. The filter press assembly according to claim 3, characterized in that: The height of the guide strip or the protrusion is consistent with the height of the bottom step frame.

5. The filter press assembly according to claim 1, characterized in that: The filter frame has a plurality of feed holes, and the plurality of feed holes are respectively connected to the chamber in a radial shape with the feed channel as the center.

6. The filter press assembly according to claim 1, characterized in that: The head plate, the tail plate and each of the intermediate guide plates have a plurality of clear liquid collecting holes on their respective guide surfaces, and the plurality of clear liquid collecting holes are radially connected to their respective guide surfaces.

7. The filter press assembly according to claim 1, characterized in that: Exhaust holes are also provided on the frame of the filter frame and on the outer sides of the guide surfaces of the head plate, the tail plate and the intermediate guide plate, respectively. The exhaust holes are used for exhausting air when the head plate, the tail plate, the filter frame and the intermediate guide plate are immersed in cleaning liquid for soaking cleaning.

8. A plate-and-frame filter press for solid-liquid separation of a solid-liquid mixture, comprising a frame and a clamping mechanism, wherein the frame is a horizontal frame member composed of two load-bearing support rods and a front fixed plate and a rear fixed plate, and the clamping mechanism is composed of a cylinder and a movable clamping plate, wherein the cylinder is arranged on the rear fixed plate, and the movable clamping plate is arranged on one side of the rear fixed plate and connected to the top rod of the cylinder, characterized in that: It also includes the filter press assembly as described in any one of claims 1 to 7, wherein the filter press assembly is arranged between the front fixed plate and the movable clamping plate and can be tightly fitted with the front fixed plate through the pushing of the movable clamping plate under the action of the oil cylinder.

9. The plate and frame filter press according to claim 8, characterized in that: It also includes a partition plate with the same shape and size as the tail plate constituting the filter press assembly. The partition plate is arranged on the load-bearing support rod between the movable clamping plate and the tail plate, and is used to fill the gap formed between the movable clamping plate and the tail plate of the filter press assembly after the cylinder's push rod is pushed out.

10. The plate and frame filter press according to claim 9, characterized in that: The head plate, the tail plate, the filter frame, the middle guide plate, and the partition plate that constitute the filter press assembly are symmetrically provided with handles on the left and right sides of their respective exteriors for slidably placing them on the load-bearing support rods of the frame.

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