Filter press and filter press discharge method

Abstract

The present application relates to the technical field of solid-liquid separation, and particularly relates to a filter press and a filter pressing and discharging method. The filter press comprises a rack, a filter pressing unit and a shaking device, wherein: the filter pressing unit comprises a water filtering assembly and a filter plate; the filter plate is slidingly arranged on the rack along a first horizontal direction, and opposite sides of the filter plate along the first horizontal direction can form a filter chamber; the water filtering assembly comprises a lifting frame floatingly arranged on the filter plate and a flexible water filtering piece arranged on the lifting frame, and the flexible water filtering piece is arranged between two adjacent filter plates; the shaking device is arranged on the rack and is configured to be capable of lifting the water filtering assembly to a specified height and enabling the water filtering assembly to do free fall after reaching the specified height. The filter press and the filter pressing and discharging method provided in the present application adopt a free fall type falling and shaking method to shake and discharge, the shaking energy is larger, the shaking effect is more sufficient, and the use conditions of most types of filter presses including bag type filter presses can be adapted.

Description

Technical Field

[0001] This invention relates to the field of solid-liquid separation technology, and in particular to a filter press and a filter press unloading method. Background Technology

[0002] Filter presses are the main filtration equipment in the solid-liquid separation industry. Horizontal filter presses can be classified into plate and frame, chamber, and diaphragm types according to their structure. For plate and frame, chamber, and diaphragm filter presses, the main filtration elements are multiple filter plates arranged side-by-side and filter cloth placed between the plates. During filtration, a pressure device compresses the filter plates, forming a closed filter chamber between adjacent plates. The slurry enters the filter chamber through the feed holes of the filter plates, is filtered by the filter cloth, and the water in the slurry is extracted, ultimately forming a filter cake in the filter chamber. Diaphragm filter presses, based on chamber filter presses, add an elastic diaphragm between the filter plates and filter cloth. Inflating the space between the elastic diaphragm and the filter plates with air further compresses the filter cake. For bag filter presses, the main filtration elements are multiple filter plates arranged side by side and filter bags placed between the filter plates. The internal space of the filter bags forms filter chambers. During filtration, the filter bags are sealed and the slurry is transported into the filter bags. The pressure device pushes each filter plate, which in turn squeezes the filter bags to filter the slurry inside the filter bags, and finally forms a filter cake inside the filter bags.

[0003] After filtration, the plate-pulling trolley pulls apart the tightly attached filter plates one by one, opening the sealed filter chamber and causing the filter cake to fall. The structure of a conventional plate-pulling trolley is described in patent document CN209500925U, entitled "An Automatic Plate-Pulling Trolley". To address the issue of filter cake sticking and incomplete falling, some plate-pulling trolleys are equipped with a vibration function. The trolley has a lifting mechanism in the middle for pushing the filter plates up and down, ensuring the filter cake falls completely. The structure of a plate-pulling trolley with a vibration function is described in patent document CN2125653996U, entitled "A Vibration Device with Limiting and Guiding Functions".

[0004] The pull plate trolley with vibration function has the following problems: short stroke, small vibration amplitude, and the acceleration difference between the filter plate and the filter cake is difficult to meet the requirements, resulting in incomplete vibration; especially for bag filter presses, due to the increased difficulty of the filter cake detaching from the filter bag, the existing pull plate trolley has low vibration energy and cannot separate the filter bag from the filter cake. Summary of the Invention

[0005] The first objective of this invention is to provide a filter press to solve the technical problem of incomplete vibration in existing filter presses.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A filter press includes a frame, a filter pressing unit, and a vibrating device, wherein:

[0008] The filter press unit includes a water filtration assembly and a filter plate; the filter plate is slidably disposed on the frame along a first horizontal direction, and filter chambers can be formed on opposite sides of the filter plate along the first horizontal direction; the water filtration assembly includes a lifting frame floating on the filter plate and a flexible water filtration element disposed on the lifting frame, the flexible water filtration element being disposed between two adjacent filter plates, and the flexible water filtration element being used to extract water from the slurry in the filter chamber;

[0009] The rapping device is mounted on the frame and is configured to lift the water filtration assembly to a specified height and to allow the water filtration assembly to free fall after reaching the specified height.

[0010] Furthermore, the vibrating device includes a pick-and-place assembly and a lifting drive source for driving the pick-and-place assembly to rise and fall. The pick-and-place assembly includes two grippers for gripping and releasing the water filtration assembly.

[0011] Furthermore, the water filtration assembly further includes a first trigger member disposed on the lifting frame, and the vibrating device further includes a second trigger member disposed on the frame, wherein: the first trigger member is configured to force the gripping ends of the two grippers to open and cause the two grippers to grip the first trigger member during the descent of the pick-and-place assembly; the second trigger member is configured to force the gripping ends of the two grippers to open and cause the two grippers to release the first trigger member during the ascent of the pick-and-place assembly;

[0012] Alternatively, the pick-and-place assembly may further include a gripper drive source for driving the gripping ends of the two grippers to open and close.

[0013] Furthermore, the pick-and-place assembly also includes a gripper bracket that is connected to the lifting drive source, and both grippers are rotatably mounted on the gripper bracket;

[0014] The gripper includes a first gripper segment that engages with the first trigger and a second gripper segment that engages with the second trigger. The first gripper segment and the second gripper segment are located on opposite sides of the rotation axis of the gripper.

[0015] Furthermore, the first trigger is T-shaped, comprising a vertical section and a horizontal section, with the upper and lower ends of the vertical section fixedly connected to the horizontal section and the lifting frame, respectively; the first gripper section is provided with hooks, and the two ends of the horizontal section can be hooked onto the hooks of the two first gripper sections, respectively.

[0016] And / or, the second trigger includes two opposing and spaced-apart second trigger portions, which respectively engage with two second gripper segments;

[0017] And / or, the pick-and-place assembly further includes an elastic element connected between the two grippers and used to drive the gripping ends of the two grippers to close.

[0018] And / or, the center of gravity of the gripper is located in the first gripper segment.

[0019] Furthermore, the two opposite sides of the filter plate along the first horizontal direction are filter pressing surfaces, and the filter pressing surfaces are provided with partition strips, which divide the filter pressing surfaces into at least two filter pressing areas.

[0020] Furthermore, the flexible filter element is a filter bag, the internal space of the filter bag forms the filter chamber, and one side of the filter bag is opened to form a discharge port;

[0021] The two opposite sides of the filter plate along the first horizontal direction are filter pressing surfaces. An elastic sealing element is provided on the filter pressing surface. The elastic sealing element is configured to press the opening side of the filter bag to close the discharge port.

[0022] Furthermore, the filter bag is provided with a discharge port at the bottom and a feed port communicating with the filter chamber;

[0023] And / or, the filter press surface is covered with a screen or the filter press surface is provided with multiple protrusions;

[0024] And / or, the upper end of the filter bag is provided with a hanging strap, and the filter bag is hung on the lifting frame by the hanging strap;

[0025] And / or, in the filter plate and the lifting frame, one of them is fixed with a plurality of guide shafts, and the other is fixed with a plurality of guide sleeves, the guide sleeves being slidably fitted onto the guide shafts one by one.

[0026] Furthermore, it also includes a plate pulling device, which includes a plate pulling trolley slidably mounted on the frame along the first horizontal direction and a plate pulling drive assembly for driving the plate pulling trolley to move. The plate pulling trolley is provided with two plate hooks for hooking the filter press unit; the vibrating device is mounted on the plate pulling trolley.

[0027] A second objective of this invention is to provide a filter press unloading method applicable to any of the above-described filter presses, comprising the following steps:

[0028] Pressure filtration: Pressure is applied to the water filtration assembly in the pressure filtration unit to form a filter cake with a target water content from the slurry in the water filtration assembly;

[0029] Release the pressure on the water filtration assembly;

[0030] Vibrating unloading: Open the water filter assembly to unload the material and put the filter press unit in a free-moving state; control the vibrating device to lift the water filter assembly to a specified height, and then control the vibrating device to remove the lifting force on the water filter assembly, so that the water filter assembly can fall freely until it hits the filter plate.

[0031] Furthermore, the filter pressing step also includes pressing at least one groove into the filter cake.

[0032] Furthermore, the flexible filter element is a filter bag, the internal space of the filter bag forms the filter chamber, the lower opening of the filter bag forms a discharge port, and the filter bag is provided with a feed inlet communicating with the filter chamber; the side of the filter plate facing the filter bag is a filter pressing surface, and the filter pressing surface is provided with an elastic sealing element and a partition strip. The elastic sealing element is configured to press the open side of the filter bag to close the discharge port, and the partition strip divides the filter pressing surface into at least two filter pressing areas;

[0033] The pressure filtration step specifically includes:

[0034] S11: Control the filter plate to move a first stroke toward the filter bag, so that the elastic sealing member presses the opening side of the filter bag to close the discharge port, thereby forming a closed filter chamber inside the filter bag;

[0035] S12: Inject the target amount of slurry into the filter chamber;

[0036] S13: Control the filter plate to move towards the filter bag in a second stroke, so that the filter plate applies pressure to the filter bag. During this process, the water in the slurry is released through the filter bag, the solid matter in the slurry forms a filter cake, and the separator bar presses at least one groove on the filter cake.

[0037] The beneficial effects of this invention are:

[0038] The filter press provided by this invention includes a frame, a filter pressing unit, and a vibrating device. The filter pressing unit includes a water filtration assembly and filter plates. The filter plates are slidably mounted on the frame along a first horizontal direction, and filter chambers are formed on opposite sides of the filter plates along the first horizontal direction. The water filtration assembly includes a lifting frame floating on the filter plates or the frame and a flexible water filtration element mounted on the lifting frame. The flexible water filtration element is disposed between two adjacent filter plates and is used to extract water from the slurry within the filter chamber. The vibrating device is mounted on the frame and configured to lift the water filtration assembly to a specified height and allow the water filtration assembly to undergo free fall after reaching the specified height. Compared to traditional lifting and vibrating methods, the filter press provided in this application uses a free fall vibrating method for discharging material, resulting in greater vibrating energy and a more thorough vibrating effect. It is adaptable to the operating conditions of most types of filter presses, including bag filter presses.

[0039] The filter press unloading method applied to the above-mentioned filter press includes the following steps: filtration: applying pressure to the water filter component in the filter press unit to form a filter cake with a target moisture content; releasing the pressure on the water filter component; vibration unloading: opening the water filter component for unloading and allowing the filter press unit to be in a free-moving state; controlling the vibration device to lift the water filter component to a specified height, and then controlling the vibration device to remove the lifting force on the water filter component, allowing the water filter component to undergo free fall until it hits the filter plate. At this time, the speed of the lifting frame in the water filter component becomes zero in a very short time, but the filter cake continues to move downward under the action of inertia, thereby causing the filter cake to fall off the flexible water filter element, completing one vibration process. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a three-dimensional structural schematic diagram of a filter press provided in an embodiment of the present invention;

[0042] Figure 2 A three-dimensional structural diagram of the vibratory device and the plate pulling trolley provided in an embodiment of the present invention at one angle;

[0043] Figure 3 This is a three-dimensional structural schematic diagram of the filter press unit provided in an embodiment of the present invention;

[0044] Figure 4A three-dimensional structural diagram of the vibratory device and the plate pulling trolley provided in an embodiment of the present invention from another angle;

[0045] Figure 5 A schematic diagram of the forward structure of the vibrating device and the plate pulling trolley provided in an embodiment of the present invention;

[0046] Figure 6 This is a three-dimensional structural diagram of the pick-and-place component provided in an embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of the side structure of the pick-and-place assembly provided in an embodiment of the present invention;

[0048] Figure 8 for Figure 7 Sectional view at AA;

[0049] Figure 9 This is a schematic diagram of the movement of the filter press provided in an embodiment of the present invention when the pressure device presses each filter press unit;

[0050] Figure 10 This is a schematic diagram illustrating the linkage between the pick-and-place component and the first trigger element provided in an embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram illustrating the linkage between the pick-and-place component and the second trigger element provided in an embodiment of the present invention;

[0052] Figure 12 This is a schematic diagram of the assembly structure of the filter plate, screen, elastic sealing member and a separator provided in an embodiment of the present invention;

[0053] Figure 13 A schematic diagram of the assembly structure of the filter plate, elastic sealing member and two partition strips provided in an embodiment of the present invention;

[0054] Figure 14 A schematic diagram of a filter plate with protrusions provided in an embodiment of the present invention;

[0055] Figure 15 This is a three-dimensional structural diagram of the filter bag provided in an embodiment of the present invention.

[0056] icon:

[0057] 1-Frame; 11-First guide rail; 12-Second guide rail; 13-Thrust plate;

[0058] 2-Filter press unit; 21-Water filtration assembly; 211-Lifting frame; 212-Filter bag; 2121-Discharge port; 2122-Inlet port; 2123-Hanging strap; 213-First trigger element; 214-Hanging rod; 22-Filter plate; 23-Elastic sealing element; 24-Separator strip; 241-Guide groove; 25-Screen; 26-Guide shaft; 27-Guide sleeve; 28-Handle;

[0059] 3-Vibrating device; 31-Pick-and-place assembly; 311-Gripper; 3111-First gripper section; 3112-Second gripper section; 3113-Spring connecting column; 3114-First guide ramp; 3115-Second guide ramp; 312-Gripper bracket; 313-Elastic element; 32-Lifting drive source; 33-Gantry frame; 34-Linkage support rod; 35-Second trigger element; 351-Second trigger part;

[0060] 4-Plate pulling device; 41-Plate pulling trolley; 42-Plate pulling drive assembly; 43-Plate hook;

[0061] 5-Pressure application device; 51-Pressure plate; 52-Pressure plate drive source. Detailed Implementation

[0062] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] It should be noted that in the description of this invention, the terms "connection" and "installation" 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 direct connection or a connection through an intermediate medium; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] Currently, filter presses typically use a cylinder to drive the filter plates to vibrate up and down to shake off the filter cake adhering to the filter cloth / bag. This method requires vibrating the entire filter plate, which not only has the technical problem of incomplete vibration but also affects the lifespan of the filter plates.

[0066] Based on this, a first aspect of the present invention provides a filter press, wherein the filter press can be any one of plate and frame type, chamber type, diaphragm type, or bag type, as described above. Figures 1 to 3 The filter press includes a frame 1, a filter pressing unit 2, and a vibrating device 3, wherein:

[0067] The filter press unit 2 includes a water filtration assembly 21 and a filter plate 22; the filter plate 22 is slidably disposed on the frame 1 along a first horizontal direction, and filter chambers can be formed on opposite sides of the filter plate 22 along the first horizontal direction; the water filtration assembly 21 includes a lifting frame 211 floating on the filter plate 22 and a flexible water filter element disposed on the lifting frame 211, the flexible water filter element being disposed between two adjacent filter plates 22, and the flexible water filter element being used to extract water from the slurry in the filter chamber;

[0068] The rapping device 3 is mounted on the frame 1 and is configured to lift the water filter assembly 21 to a specified height and to allow the water filter assembly 21 to fall freely after reaching the specified height.

[0069] In the above structure, the number of filter press units 2 can be one or more. To improve the filtration efficiency, the filter press typically includes multiple filter press units 2 arranged side by side along the first horizontal direction, and a filter chamber for filter bags / filter cloths can be formed between two adjacent filter plates 22. The lifting frame 211 serves to support the flexible filter element, which can be floated on the filter plate 22 or on the frame 1. Floating placement means that the lifting frame 211 can be lifted relative to the filter plate 22 or the frame 1 and fall freely. In this embodiment, the lifting frame 211 is floated on the filter plate 22. For plate and frame, chamber, and diaphragm filter presses, the flexible filter element is specifically a filter cloth, which is generally provided on both sides of the filter plate 22 along the first horizontal direction. For bag filter presses, the flexible filter element is specifically a filter bag, and the internal space of the filter bag forms a filtration chamber. Both the filter cloth and the filter bag serve to extract water from the slurry in the filter chamber.

[0070] An optional operating process of the filter press provided in this application is as follows: Each filter press unit 2 is pressed to apply pressure to the water filtration component 21 within the filter press unit 2, causing the slurry within the water filtration component 21 to form a filter cake with a target moisture content (this process can be the filtration process of a conventional filter press); after filtration, one filter press unit 2 located at the end is pulled apart from the remaining tightly attached filter press units 2, opening the filter chamber formed by the filter press unit 2 and allowing the filter press unit 2 to move freely; then, the vibrating device 3 is controlled to lift the water filtration component 21 in the filter press unit 2 to a specified height; subsequently, the vibrating device 3 is controlled to release the lifting force on the water filtration component 21, allowing the water filtration component 21 to... 1. The filter cake undergoes free fall until the lifting frame 211 in the filter assembly 21 impacts the filter plate 22. At this point, the velocity of the lifting frame 211 becomes zero in a very short time. However, the flexible filter element on the lifting frame 211 exhibits a certain lag in the transmission of motion, and the filter cake continues to move downwards under inertia. Under the frictional force between the filter cake and the flexible filter element, as well as the gravity of the filter cake, the filter cake begins to decelerate. When the frictional force reaches the maximum static friction, the filter cake and the flexible filter element undergo relative motion, and the filter cake falls off, completing the rapping process. To ensure more thorough detachment of the filter cake, the filter assembly 21 can be rapped multiple times, causing it to impact the filter plate 22 multiple times. The above rapping process is then performed on the remaining filter press units 2 until all rapping processes are completed.

[0071] It should be noted that the filter press provided in this application is not limited to the above-described rapping process. For example, each filter press unit 2 can be pulled apart separately, allowing each filter press unit 2 to move freely, and then the rapping device 3 can be controlled to rappel the water filtration components 21 in each filter press unit 2 in sequence. In addition, the number of rapping devices 3 can be one or more; when there are multiple rapping devices 3, multiple rapping devices 3 can work simultaneously, thereby rapping multiple filter press units 2 at the same time, improving rapping efficiency.

[0072] Continue to refer to Figure 1 The filter press also includes a pressure applying device 5 for applying pressure to the filter pressing unit 2. The pressure applying device 5 includes a pressing plate 51 and a pressing plate drive source 52 mounted on the frame 1 for driving the pressing plate 51 to move in a first horizontal direction; wherein, the pressing plate drive source 52 can be a hydraulic cylinder. A thrust plate 13 is mounted on the frame 1, and the pressing plate 51 and the thrust plate 13 are arranged parallel to each other at intervals. Each filter pressing unit 2 is arranged between the pressing plate 51 and the thrust plate 13. During filtration, the pressing plate drive source 52 drives the pressing plate 51 to move in a direction close to the thrust plate 13. During this process, the pressing plate 51 pushes each filter pressing unit 2 to slide on the frame 1 in a direction close to the thrust plate 13, thereby pressing each filter pressing unit 2 between the pressing plate 51 and the thrust plate 13.

[0073] After filtration is completed, in order to separate the tightly pressed filter units 2, the filter press also includes a plate pulling device 4. The plate pulling device 4 includes a plate pulling trolley 41 slidably mounted on the frame 1 along a first horizontal direction and a plate pulling drive assembly 42 for driving the plate pulling trolley 41 to move. The plate pulling trolley 41 is provided with two plate hooks 43 for hooking the filter units 2. The structure of the plate pulling trolley 41 is the same as that of the plate pulling trolley on a conventional filter press, and will not be described in detail here. The plate pulling drive assembly 42 can be any of the linear transmission methods such as sprocket and chain drive, gear and rack drive, or screw and nut drive, as long as it can meet the condition of driving the plate pulling trolley 41 to reciprocate along the first horizontal direction.

[0074] Based on the above structure, in this embodiment, the vibrating device 3 is mounted on the plate pulling carriage 41. In this embodiment, the vibrating device 3 is slidably disposed on the frame 1 along the first horizontal direction, and can move synchronously with the plate pulling carriage 41 under the drive of the plate pulling drive assembly 42, so as to sequentially pull open each filter pressing unit 2 and perform vibration after the filter pressing is completed.

[0075] In some other embodiments, the vibrating device 3 is fixedly mounted on the frame 1 and on the moving path of the plate pulling trolley 41. The plate pulling trolley 41 can sequentially pull each filter pressing unit 2 to the vibrating device 3 for vibrating, and pull the filter pressing unit 2 after vibrating from the vibrating device 3, so that the vibrating device 3 vibrates each filter pressing unit 2 in sequence.

[0076] Reference Figure 1 and Figure 2 Two pull-plate trolleys 41 are slidably arranged on opposite sides of the frame 1. This arrangement allows for the application of tension to both sides of the filter press unit 2, facilitating the separation of each filter press unit 2. First guide rails 11 extending along a first horizontal direction are respectively provided on both sides of the frame 1. Each pull-plate trolley 41 is slidably mounted on the first guide rail 11 on the same side, and the movement trajectory of the pull-plate trolley 41 is restricted by the first guide rails 11. In this embodiment, the vibrating device 3 includes a gantry frame 33, with both ends of the gantry frame 33 fixedly mounted on the two pull-plate trolleys 41, so that the gantry frame 33 and all its components are moved relative to the frame 1 by the two pull-plate trolleys 41. In other embodiments, both ends of the gantry frame 33 can also be directly fixedly mounted on the frame 1. After filtration, the two pull-plate trolleys 41 sequentially pull each filter press unit 2 to the inside of the gantry frame 33 for vibrating.

[0077] Reference Figure 4 and Figure 5The vibrating device 3 includes a pick-and-place assembly 31 and a lifting drive source 32 mounted on the frame 1 for driving the pick-and-place assembly 31 to move up and down. The pick-and-place assembly 31 includes two grippers 311 for gripping and releasing the water filter assembly 21. In this embodiment, the lifting drive source 32 is a piston cylinder (the piston cylinder can be one of a pneumatic cylinder, hydraulic cylinder, or electric cylinder). The cylinder body of the lifting drive source 32 is fixedly mounted on the gantry frame 33, and the piston rod end of the lifting drive source 32 is connected to the pick-and-place assembly 31. Of course, the lifting drive source 32 can also be a motor, and the output shaft of the motor is connected to the pick-and-place assembly 31 through a transmission structure that converts torque into linear torque.

[0078] Optionally, the number of pick-and-place components 31 can be one or more. In this embodiment, the number of pick-and-place components 31 is multiple (specifically two), and the multiple pick-and-place components 31 are arranged side by side along a second horizontal direction perpendicular to the first horizontal direction. By using multiple pick-and-place components 31, the filter press unit 2 can be gripped at multiple points, thereby improving the stability of the filter press unit 2 during the lifting process. Based on the above structure, the vibrating device 3 also includes a linkage support rod 34 that is connected to the lifting drive source 32. The linkage support rod 34 extends along the second horizontal direction, and the multiple pick-and-place components 31 are installed side by side on the linkage support rod 34. The linkage support rod 34 can enable the multiple pick-and-place components 31 to lift and lower synchronously, and can also reduce the number of lifting drive sources 32.

[0079] Optionally, the number of lifting drive sources 32 can be one or more. In this embodiment, there are two lifting drive sources 32, which are respectively installed at both ends of the gantry frame 33, and the two ends of the linkage support rod 34 are respectively connected to the two lifting drive sources 32 for transmission.

[0080] Reference Figures 9 to 11 In this embodiment, the water filtration assembly 21 further includes a first trigger 213 disposed on the lifting frame 211, and the vibrating device 3 further includes a second trigger 35 disposed on the frame 1, wherein: the first trigger 213 is configured to force the gripping ends of the two grippers 311 to open and cause the two grippers 311 to grip the first trigger 213 during the descent of the pick-and-place assembly 31; the second trigger 35 is configured to force the gripping ends of the two grippers 311 to open and cause the two grippers 311 to release the first trigger 213 during the ascent of the pick-and-place assembly 31.

[0081] Specifically, each lifting frame 211 is fixedly equipped with one or more first trigger elements 213, and the gantry frame 33 is fixedly equipped with one or more second trigger elements 35. The number of first trigger elements 213 on each lifting frame 211, the number of second trigger elements 35 on each gantry frame 33, and the number of pick-and-place components 31 on each gantry frame 33 are the same. (Refer to...) Figure 9When the gantry 33 moves to cover one of the filter press units 2 (or when the filter press unit 2 moves to the inside of the gantry 33), the first trigger 213 in the filter press unit 2, the second trigger 35 on the gantry 33, and the pick-and-place assembly 31 on the gantry 33 correspond one-to-one; at this time, the lifting drive source 32 is controlled to drive the pick-and-place assembly 31 to descend. During the descent of the pick-and-place assembly 31, the first trigger 213 on the filter press unit 2 forces the gripping ends of the corresponding two grippers 311 to open and cause the two grippers 311 to grip the first trigger 213; then, the lifting drive source 32 is controlled to drive the pick-and-place assembly 31 to rise, and the pick-and-place assembly 31 drives the water filtration assembly 21 in the filter press unit 2 to rise synchronously; refer to Figure 10 When the pick-and-place assembly 31 rises to the point where the two grippers 311 contact the corresponding second trigger 35, the pick-and-place assembly 31 continues to rise. The second trigger 35 will force the gripping ends of the two grippers 311 to open so that the two grippers 311 release the first trigger 213, thereby removing the lifting force on the water filter assembly 21. Then, the water filter assembly 21 will undergo free fall until it hits the filter plate 22.

[0082] Continue to refer to Figure 1 The filter press unit 2 also includes two handles 28 symmetrically arranged on both sides of the filter plate 22 along the second horizontal direction. The filter press unit 2 is slidably placed on the frame 1 via the two handles 28. In order to limit the movement trajectory of the filter press unit 2, a second guide rail 12 extending along the first horizontal direction is respectively provided on both sides of the frame 1 along the second horizontal direction. The bottom surface of each handle 28 is provided with a guide groove, and the guide grooves on the two handles 28 can correspond one-to-one and slide into the two second guide rails 12.

[0083] Reference Figures 6 to 8 The pick-and-place assembly 31 also includes a gripper bracket 312 that is connected to the lifting drive source 32 for transmission, and both grippers 311 are rotatably mounted on the gripper bracket 312.

[0084] The gripper 311 includes a first gripper segment 3111 that is linked to the first trigger 213 and a second gripper segment 3112 that is linked to the second trigger 35. The first gripper segment 3111 and the second gripper segment 3112 are located on opposite sides of the rotation axis of the gripper 311.

[0085] In the above structure, the lower end of the first gripper segment 3111 is also the gripping end of the gripper 311; the gripper bracket 312 serves to support the two grippers 311. The gripper bracket 312 can be fixed to the linkage support rod 34 by bolt connection or welding, etc., and its specific structure is not limited here. During the vibration process, when the pick-and-place assembly 31 descends, the first trigger 213 can be inserted between the two first gripper segments 3111, forcing the two first gripper segments 3111 to open; when the pick-and-place assembly 31 rises, the second trigger 35 can force the two second gripper segments 3112 to close, thereby driving the two first gripper segments 3111 to open.

[0086] Optionally, the pick-and-place assembly 31 further includes an elastic element 313 connected between the two grippers 311 and used to drive the gripping ends of the two grippers 311 to close; and / or, the center of gravity of the grippers 311 is located at the first gripper segment 3111. Both of these structures allow the two first gripper segments 3111 to automatically close and reset when no external force is applied. For embodiments with the elastic element 313, the elastic element 313 can be any one of a compression spring, a tension spring, or a torsion spring. (Refer to...) Figure 7 In this embodiment, the elastic element 313 is a compression spring. The two ends of the compression spring are respectively connected to the two second gripper segments 3112, so that an elastic force can be applied to open the two second gripper segments 3112 (that is, to close the two first gripper segments 3111). In order to prevent the compression spring from falling off, spring connecting posts 3113 are respectively provided on the opposite side of the two second gripper segments 3112, and the two ends of the compression spring are respectively sleeved on the two spring connecting posts 3113.

[0087] In some embodiments, refer to Figure 10 The first trigger 213 is T-shaped, comprising a vertical section and a horizontal section. The upper and lower ends of the vertical section are fixedly connected to the horizontal section and the lifting frame 211, respectively. Hooks are provided on the first gripper section 3111, and the two ends of the horizontal section can be hooked onto the hooks of the two first gripper sections 3111, respectively. During the descent of the pick-and-place assembly 31, the horizontal section inserts between the two first gripper sections 3111, forcing them to open. After the hooks on the first gripper sections 3111 pass the horizontal section, the two first gripper sections 3111 close under the action of elasticity and / or gravity, so that the two ends of the horizontal section are hooked onto the hooks of the two first gripper sections 3111, respectively. Furthermore, to facilitate the insertion of the first trigger 213, a first guide ramp 3114 is provided on the lower side of each of the two first gripper sections 3111. The two first guide ramps 3114 are arranged in a V-shape, forming a channel for the insertion of the first trigger 213.

[0088] In some embodiments, refer to Figure 11The second trigger 35 includes two opposing and spaced-apart second trigger portions 351, which are respectively linked and engaged with two second gripper segments 3112. During the upward movement of the pick-and-place assembly 31, the two second gripper segments 3112 insert into the gap between the two second trigger portions 351 and close under the pressure of the two second trigger portions 351, thereby causing the two first gripper segments 3111 to open. When the two first gripper segments 3111 open until the hook disengages from the horizontal section, the two grippers 311 release the first trigger 213. Further, to facilitate insertion into the gap between the two second trigger portions 351, a second guide slope 3115 is provided on the upper side of each of the two second gripper segments 3112. The two second guide slopes 3115 are arranged in a figure-eight shape and are respectively located on opposite sides of the two second gripper segments 3112. Alternatively, the gap between the two second trigger portions 351 can be configured as a figure-eight channel.

[0089] As described above, in this embodiment, the two grippers 311 of the pick-and-place component 31 automatically grip the water filter component 21 under the trigger of the first trigger 213, and automatically release the water filter component 21 under the trigger of the second trigger 35. Of course, in some other embodiments, the opening and closing of the two grippers 311 of the pick-and-place component 31 can also be controlled by a drive source; for example, the pick-and-place component 31 includes a gripper drive source for driving the gripping ends of the two grippers 311 to open and close. The gripper drive source can be a thumb cylinder, the cylinder body of the gripper drive source is fixedly mounted on the linkage support rod 34, and the two thumbs of the gripper drive source are fixedly connected to the two grippers 311 respectively.

[0090] In some embodiments, refer to Figure 12 and Figure 13 The two opposite sides of the filter plate 22 along the first horizontal direction are filter pressing surfaces. Separating strips 24 are provided on the filter pressing surfaces, dividing them into at least two filter pressing areas. During the pressing process of the pressing device 5, each filter pressing unit 2 is pressed together, forming a closed filter chamber between two adjacent filter plates 22. The separating strips 24 divide the filter chamber into at least two filter pressing spaces. The thickness at the boundary between two adjacent filter pressing spaces is less than the thickness at the center of each filter pressing space, thus pressing at least one groove into the final filter cake. The grooves on the filter cake become weak points for breakage, making the filter cake easier to break, thereby reducing the difficulty of unloading and facilitating the removal of the filter cake from the filter pressing unit 2.

[0091] It should be noted that the filter plate 22 has two filter pressing surfaces. The partition strip 24 can be provided on only one of the filter pressing surfaces, or the partition strip 24 can be provided on each filter pressing surface. Since the filter press usually includes multiple filter pressing units 2 arranged side by side, it is only necessary to provide a partition strip 24 between two adjacent filter plates 22.

[0092] Optionally, the number of separators 24 can be one or more, and the number of separators 24 can be adjusted according to actual conditions (e.g., the volume of the filter cake); such as Figure 12 As shown, when there is only one separator 24, the separator 24 divides the filter press surface into two filter press areas, thereby pressing a groove into the final filter cake; as Figure 13 As shown, when there are two separator strips 24, the separator strips 24 divide the filter press surface into three filter press areas, thereby pressing two grooves into the final filter cake. When there are multiple separator strips 24, the multiple separator strips 24 can be arranged in a striped, grid-like, radial, or intersecting pattern, and the multiple separator strips 24 can be a separate structure or a one-piece molded structure. The cross-sectional outline of the separator strip 24 can be polygonal (e.g., triangle, quadrilateral, pentagon, etc.), circular, elliptical, etc. In addition, the separator strip 24 can be a regular prism, cylinder, etc., or an irregular columnar structure. The number, shape, and arrangement of the separator strips 24 can be flexibly adjusted and are not limited here.

[0093] In some embodiments, the separator 24 is fitted onto the filter plate 22 by a tenon and mortise structure; or, the separator 24 is installed onto the filter plate 22 by fasteners such as screws.

[0094] In some embodiments, the separator 24 is an elastic element, and its material can be various elastic materials such as polyurethane and rubber. Because the separator 24 is an elastic element, during the filtration process, its own deformation can absorb most of the filter cake deformation, reducing the pressure exerted on the filter chamber periphery by the deformed filter cake. For bag filter presses, the separator 24's own compression deformation can reduce the gap between adjacent filter plates 22, thereby improving the filtration effect and resulting in a lower moisture content in the final filter cake. Of course, the separator 24 can also be made of a rigid material, achieving the same effect of pressing grooves into the filter cake.

[0095] In some embodiments, the partition bar 24 is provided with a flow guide groove 241 or a flow guide hole, which is connected between the filter pressing areas located on both sides of the partition bar 24 to facilitate the flow of filtrate and reduce the load during the filter pressing process. The number of flow guide grooves 241 or flow guide holes can be set to one or more.

[0096] In some embodiments, such as Figure 12 As shown, a screen 25 covers the filter press surface. The screen 25 can be a metal mesh such as steel wire, or it can be a non-metallic mesh. In other embodiments, such as Figure 14As shown, multiple protrusions are provided on the filter press surface. Both the screen 25 and the multiple protrusions are designed to create flow channels on the filter press surface for easy drainage. Compared to drainage methods using multiple protrusions on the filter press surface, drainage methods using a screen 25 on the filter press surface reduce processing difficulty, and the screen 25 can be disassembled and replaced, solving the problem of protrusion wear.

[0097] All of the above implementations are applicable to any type of filter press, including plate and frame, chamber, diaphragm, and bag filter presses.

[0098] When the filter press provided in this application is specifically a bag filter press, refer to Figure 11 The flexible filter element is specifically a filter bag 212. The internal space of the filter bag 212 forms a filtration chamber. One side of the filter bag 212 is open to form a discharge port 2121. The two opposite sides of the filter plate 22 along the first horizontal direction are filter pressing surfaces. An elastic sealing element 23 is provided on the filter pressing surface. The elastic sealing element 23 is configured to press the open side of the filter bag 212 to close the discharge port 2121.

[0099] Conventional bag filter presses typically have a separate sealing device for opening and closing the discharge port 2121 of the filter bag 212. Unlike conventional bag filter presses, the bag filter press provided in this application has an elastic sealing element 23 on the filter plate 22 for opening and closing the discharge port 2121 of the filter bag 212, eliminating the need for a conventional sealing device. This simplifies the structure and workflow of the bag filter press. Furthermore, using an elastic element to press and close the discharge port 2121 provides a better sealing effect compared to a clamping plate structure. Additionally, during the process of the filter plate 22 compressing the filter bag 212, the elastic element itself absorbs the deformation of the filter cake, reducing the pressure on the opening edge of the filter bag 212 after the filter cake deforms.

[0100] It should be noted that the filter plate 22 has two filter pressing surfaces. The elastic sealing element 23 can be provided on only one of the filter pressing surfaces, or the elastic sealing element 23 can be provided on each filter pressing surface. It is sufficient to provide an elastic sealing element 23 between two adjacent filter plates 22.

[0101] In some embodiments, the elastic sealing member 23 is embedded in the filter plate 22 by a tenon and mortise structure; or, the elastic sealing member 23 is installed on the filter plate 22 by fasteners such as screws.

[0102] In some embodiments, the bottom of the filter bag 212 is provided with a discharge port 2121, and correspondingly, the lower edge of the filter pressing surface is provided with an elastic sealing member 23. During the filtration process, the pressure applying device 5 presses each filter pressing unit 2. At this time, the lower edge of the filter bag 212 located between the thrust plate 13 (or pressing plate 51) and the filter plate 22 is clamped between the elastic sealing member 23 and the thrust plate 13 (or pressing plate 51), and the lower edge of the filter bag 212 located between two adjacent filter plates 22 is clamped between two elastic sealing members 23, thereby achieving the closure of the discharge port 2121 of each filter bag 212. The filter bag 212 can always be provided with the discharge port 2121 facing downwards; or, the discharge port 2121 of the filter bag 212 can be flipped downwards during discharge to facilitate discharge. In the embodiment where the filter bag 212 is always positioned with the discharge port 2121 facing downwards, the filter bag 212 is provided with an inlet 2122 that communicates with the filter chamber. After the discharge port 2121 of the filter bag 212 is closed, slurry is injected into the filter bag 212 through the inlet 2122. The inlet 2122 can be provided on both sides or the top of the filter bag 212, preferably on both sides of the filter bag 212.

[0103] Optionally, a filter bag 212 can be provided between two adjacent filter plates 22, or multiple filter bags 212 can be provided, where multiple means two or more. That is, in each filter press unit 2, the number of filter bags 212 can be one or more; when the number of filter bags 212 is one, the filter bag 212 is disposed on one side of the filter plate 22 along the first horizontal direction; when the number of filter bags 212 is multiple, the multiple filter bags 212 can be disposed on the same side of the filter plate 22 along the first horizontal direction, or the multiple filter bags 212 can be divided into two groups and disposed on opposite sides of the filter plate 22 along the first horizontal direction. In this embodiment, the number of filter bags 212 in each filter press unit 2 is two, and the two filter bags 212 are disposed on opposite sides of the filter plate 22 along the first horizontal direction, so that there are two filter bags 212 between every two adjacent filter plates 22.

[0104] Reference Figure 15 In this embodiment, the upper end of the filter bag 212 is provided with a hanging strap 2123, and the filter bag 212 is hung on the lifting frame 211 via the hanging strap 2123. Correspondingly, the lifting frame 211 is provided with a hanging rod 214 for mounting the hanging strap 2123; one or more filter bags 212 can be hung on each hanging rod 214. In other embodiments, the filter bag 212 can also be installed on the lifting frame 211 by means of screw connection or buckle connection.

[0105] Continue to refer to Figure 15In this embodiment, the filter plate 22 and the lifting frame 211 are each provided with a plurality of guide shafts 26 and a plurality of guide sleeves 27, which are slidably fitted onto the guide shafts 26. For example, a guide shaft 26 is provided on each of the opposite sides of the filter plate 22, and a guide sleeve 27 is provided at each end of the lifting frame 211, with the two guide sleeves 27 slidably fitted onto the two guide shafts 26 respectively. Since the guide sleeves 27 can only slide up and down along the guide shafts 26, the falling trajectory of the lifting frame 211 relative to the filter plate 22 can be restricted, allowing the water filtration assembly 21 to fall smoothly onto the filter plate 22 during the vibration process.

[0106] Where the technical principles and objectives of this application are met, the embodiments of this application may be combined in any way, and the resulting technical solutions are also within the protection scope of this application.

[0107] A second aspect of this application provides a filter press unloading method applied to the above-mentioned filter press, the filter press unloading method comprising:

[0108] Filtration: Pressure is applied to the water filter assembly 21 in the filtration unit 2 to form a filter cake with the target water content.

[0109] Release the pressure on the water filter assembly 21;

[0110] Vibrating unloading: Open the water filter assembly 21 to unload the material and put the filter press unit 2 in a free-moving state; control the vibrating device 3 to lift the water filter assembly 21 in the filter press unit 2 to a specified height, and then control the vibrating device 3 to remove the lifting force on the water filter assembly 21, so that the water filter assembly 21 can fall freely until it hits the filter plate 22.

[0111] When there are multiple filter press units 2, repeat the above unloading and vibration steps, and unload and vibrate each filter press unit 2 in turn until all vibration processes are completed.

[0112] For plate and frame, chamber, and diaphragm filter presses, the flexible filter element is specifically a filter cloth. The filter pressing steps specifically include (same as the prior art): controlling the pressure plate drive source 52 to drive the pressure plate 51 to move toward the thrust plate 13. The pressure plate 51 pushes each filter pressing unit 2 to move toward the direction close to the thrust plate 13, so that each filter pressing unit 2 is pressed between the pressure plate 51 and the thrust plate 13. At this time, the two adjacent filter plates 22, the filter plate 22 and the pressure plate 51, and the filter plate 22 and the thrust plate 13 respectively form closed filter chambers. Slurry is injected into the closed filter chamber through the feed hole on the filter plate 22. During this process, the slurry precipitates water through the filter cloth and forms a filter cake in the filter chamber.

[0113] For existing bag filter presses, the filtration process specifically includes: controlling the sealing device to seal the discharge port 2121 of the filter bag 212, forming a closed filter chamber inside the filter bag 212; injecting a target amount of slurry into the filter bag 212; controlling the pressure plate drive source 52 to drive the pressure plate 51 to move toward the thrust plate 13, the pressure plate 51 pushes each filtration unit 2 toward the thrust plate 13, so that each filtration unit 2 is pressed between the pressure plate 51 and the thrust plate 13. During this process, the filter plate 22 filters the filter bag 212, and the slurry precipitates water through the filter bag 212, so that the slurry inside the filter bag 212 forms a mud cake with a target moisture content.

[0114] Regardless of whether it is a plate and frame filter press, chamber filter press, diaphragm filter press, or bag filter press, the steps for releasing the pressure on the filter press unit 2 are roughly the same, specifically including: controlling the pressure plate drive source 52 to drive the pressure plate 51 to move away from the thrust plate 13, so as to release the pressure on the filter press unit 2. The vibration unloading step also includes: controlling the pull plate trolley 41 to pull apart each tightly attached filter press unit 2 in sequence, so as to open the filter chamber for unloading and put each filter press unit 2 in a free-moving state.

[0115] Furthermore, in the method provided in this application, the pressure filtration step further includes pressing at least one groove into the filter cake. Specifically, during the pressure filtration of the slurry in the filter chamber, the separator strip 24 on the filter plate 22 presses at least one groove into the surface of the filter cake.

[0116] In one specific embodiment, the flexible filter element is a filter bag 212, the internal space of the filter bag 212 forms a filter chamber, the lower opening of the filter bag 212 forms a discharge port 2121, and the filter bag 212 is provided with a feed inlet 2122 communicating with the filter chamber; the side of the filter plate 22 facing the filter bag 212 is a filter pressing surface, and an elastic sealing element 23 and a partition strip 24 are provided on the filter pressing surface. The elastic sealing element 23 is configured to press the filter bag 212 to close the discharge port 2121, and the partition strip 24 divides the filter pressing surface into at least two filter pressing areas; based on the above embodiment, the filter pressing steps provided in this application specifically include:

[0117] S11: Control the filter plate 22 to move towards the filter bag 212 by a first stroke, so that the elastic sealing member 23 presses the opening side of the filter bag 212 to close the discharge port 2121, thereby forming a closed filter chamber inside the filter bag 212.

[0118] S12: Inject the target amount of slurry into the filter chamber;

[0119] S13: Control the filter plate 22 to move towards the filter bag 212 for a second stroke, so that the filter plate 22 applies pressure to the filter bag 212. During this process, the water in the slurry is released through the filter bag 212, the solid matter in the slurry forms a filter cake, and the separator 24 presses at least one groove on the filter cake.

[0120] In summary, in one embodiment, the filter press unloading method specifically includes the following steps:

[0121] S1, Filtration:

[0122] S11: Reference Figure 8 The control pressure plate drive source 52 drives the pressure plate 51 to move a certain distance toward the thrust plate 13. The pressure plate 51 pushes each filter pressing unit 2 toward the thrust plate 13, so that each filter plate 22 moves a first distance toward the filter bag 212. At this time, each filter pressing unit 2 is initially pressed between the pressure plate 51 and the thrust plate 13. The lower edge of the filter bag 212 located between the thrust plate 13 (or pressure plate 51) and the filter plate 22 is clamped between the elastic sealing member 23 and the thrust plate 13 (or pressure plate 51). The lower edge of the filter bag 212 located between two adjacent filter plates 22 is clamped between two elastic sealing members 23, thereby achieving the closure of the discharge port 2121 of each filter bag 212.

[0123] S12: Inject the target amount of slurry into the filter chamber through the feed inlet 2122 above the filter bag 212;

[0124] S13: After all filter bags 212 have been filled with material, the control pressure plate drive source 52 drives the pressure plate 51 to move a certain distance towards the direction of the thrust plate 13. The pressure plate 51 pushes each filter pressing unit 2 to move towards the thrust plate 13, so that each filter plate 22 moves a second distance towards the direction of the filter bag 212. During this process, the filter plate 22 applies pressure to the internal space (i.e. filter chamber) of the filter bag 212 so that the slurry in the filter bag 212 forms a filter cake. At the same time, the separator 24 presses at least one groove on the filter cake.

[0125] S2, control the pressure plate drive source 52 to drive the pressure plate 51 to move away from the thrust plate 13, so as to release the pressure on the water filter assembly 21;

[0126] S3, Unloading Preparation: Control the pulling plate trolley 41 to pull the end filter press unit 2 away from the other closely attached filter press units 2 by a third stroke. The third stroke is greater than or equal to the sum of the first and second strokes. At this time, the discharge port 2121 of the filter bag 212 of the filter press unit 2 is open, and the filter press unit 2 is in a free-moving state. Since the vibrating device 3 moves synchronously with the pulling plate trolley 41, the positions of the filter press unit 2 and the vibrating device 3 correspond at this time (e.g., ...). Figure 9 (as shown);

[0127] S4, Vibratory unloading:

[0128] S41: Reference Figure 9 The lifting drive source 32 controls the picking and placing component 31 to descend. During the descent of the picking and placing component 31, the first trigger 213 on the water filter component 21 forces the gripping ends of the corresponding two grippers 311 to open and cause the two grippers 311 to grip the first trigger 213.

[0129] S42: Reference Figure 10 The lifting drive source 32 controls the lifting and placing component 31 to rise, and the lifting and placing component 31 drives the water filter component 21 to rise synchronously. When the lifting and placing component 31 rises to the point where the two grippers 311 contact the corresponding second trigger 35, the lifting and placing component 31 continues to rise. The second trigger 35 will force the gripping ends of the two grippers 311 to open so that the two grippers 311 release the first trigger 213, thereby removing the lifting force on the water filter component 21.

[0130] S43: The water filter assembly 21 undergoes free fall until it impacts the filter plate 22. At this time, the speed of the lifting frame 211 becomes zero in a very short time. However, since the filter bag 212 is a flexible material, there is a certain lag in the transmission of motion. The filter cake is still moving downward under the action of inertia. Under the action of friction between the filter cake and the filter bag 212 and the gravity of the filter cake, the filter cake begins to decelerate. When the friction reaches the maximum static friction, the filter cake and the filter bag 212 undergo relative motion, the filter cake falls off, and the rapping process is completed.

[0131] The above steps S41-43 can be repeated to vibrate the water filter component 21 in the filter press unit 2 multiple times;

[0132] Repeat steps S3 and S4 above to unload and vibrate the remaining closely attached filter press units 2 in sequence until all vibration processes are completed.

[0133] Compared to traditional lifting and vibrating methods, the filter press provided in this application uses a free-fall dropping vibration method for discharging, resulting in greater vibration energy and a more thorough vibration effect. This method is adaptable to the operating conditions of most types of filter presses, including bag filter presses. Furthermore, during the filtration process, at least one groove is pressed into the filter cake by the separator 24, making the filter cake easier to break, thus reducing the difficulty of discharging and making it easier for the filter cake to detach from the flexible filter element. In addition, compared to existing bag filter presses, one embodiment of this application provides a bag filter press that eliminates the original sealing device, using an elastic sealing element 23 on the filter plate 22 to seal the discharge port 2121 of the filter bag 212, making the structure and filtration process of the filter press simpler.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter press, characterized in that, It includes a frame (1), a filter press unit (2), and a vibrating device (3), wherein: The filter press unit (2) includes a water filtration assembly (21) and a filter plate (22); the filter plate (22) is slidably disposed on the frame (1) along a first horizontal direction, and filter chambers can be formed on opposite sides of the filter plate (22) along the first horizontal direction; the water filtration assembly (21) includes a lifting frame (211) floating on the filter plate (22) and a flexible water filter element disposed on the lifting frame (211), the flexible water filter element being disposed between two adjacent filter plates (22), the flexible water filter element being used to extract water from the slurry in the filter chamber; The vibrating device (3) is mounted on the frame (1) and is configured to lift the water filter assembly (21) to a specified height and to allow the water filter assembly (21) to fall freely after reaching the specified height. The vibrating device (3) includes a pick-and-place assembly (31) and a lifting drive source (32) for driving the pick-and-place assembly (31) to rise and fall. The pick-and-place assembly (31) includes two grippers (311) for gripping and releasing the water filter assembly (21). The water filtration assembly (21) further includes a first trigger (213) disposed on the lifting frame (211), and the vibrating device (3) further includes a second trigger (35) disposed on the frame (1), wherein: the first trigger (213) is configured to force the gripping ends of the two grippers (311) to open and cause the two grippers (311) to grip the first trigger (213) during the descent of the pick-and-place assembly (31); the second trigger (35) is configured to force the gripping ends of the two grippers (311) to open and cause the two grippers (311) to release the first trigger (213) during the ascent of the pick-and-place assembly (31); The pick-and-place assembly (31) also includes a gripper bracket (312) that is connected to the lifting drive source (32) for transmission, and both grippers (311) are rotatably mounted on the gripper bracket (312); The gripper (311) includes a first gripper segment (3111) that is linked to the first trigger (213) and a second gripper segment (3112) that is linked to the second trigger (35). The first gripper segment (3111) and the second gripper segment (3112) are respectively located on opposite sides of the rotation axis of the gripper (311).

2. The filter press according to claim 1, characterized in that, The first trigger (213) is T-shaped and includes a vertical section and a horizontal section. The upper and lower ends of the vertical section are fixedly connected to the horizontal section and the lifting frame (211) respectively. The first gripper section (3111) is provided with hooks, and the two ends of the horizontal section can be hooked onto the hooks of the two first gripper sections (3111) respectively. And / or, the second trigger (35) includes two opposing and spaced second trigger parts (351), and the two second trigger parts (351) are respectively linked and cooperate with the two second gripper segments (3112); And / or, the pick-and-place assembly (31) further includes an elastic element (313) connected between the two grippers (311) and used to drive the gripping ends of the two grippers (311) to close. And / or, the center of gravity of the gripper (311) is located at the first gripper segment (3111).

3. The filter press according to claim 1, characterized in that, The two opposite sides of the filter plate (22) along the first horizontal direction are filter pressing surfaces, and the filter pressing surfaces are provided with partition strips (24), which divide the filter pressing surfaces into at least two filter pressing areas.

4. The filter press according to claim 1, characterized in that, The flexible water filter element is a filter bag (212), the internal space of the filter bag (212) forms the filter chamber, and one side of the filter bag (212) is opened to form a discharge port (2121). The two opposite sides of the filter plate (22) along the first horizontal direction are filter pressing surfaces. An elastic sealing member (23) is provided on the filter pressing surface. The elastic sealing member (23) is configured to press the opening side of the filter bag (212) to close the discharge port (2121).

5. The filter press according to claim 4, characterized in that, The filter bag (212) is provided with a discharge port (2121) at the bottom and a feed port (2122) communicating with the filter chamber. And / or, the filter press surface is covered with a screen (25) or the filter press surface is provided with a plurality of protrusions; And / or, the upper end of the filter bag (212) is provided with a hanging strap (2123), and the filter bag (212) is hung on the lifting frame (211) by the hanging strap (2123); And / or, of the filter plate (22) and the lifting frame (211), one is fixed with a plurality of guide shafts (26) and the other is fixed with a plurality of guide sleeves (27), and the guide sleeves (27) are slidably fitted on the guide shafts (26) one by one.

6. The filter press according to any one of claims 1 to 5, characterized in that, It also includes a plate pulling device (4), which includes a plate pulling trolley (41) that is slidably mounted on the frame (1) along the first horizontal direction and a plate pulling drive assembly (42) for driving the plate pulling trolley (41) to move. The plate pulling trolley (41) is provided with two plate hooks (43) for hooking the filter press unit (2). The vibrating device (3) is mounted on the plate pulling trolley (41).

7. A method for unloading material from a filter press, characterized in that, Applied to the filter press as described in any one of claims 1 to 6, comprising the following steps: Pressure filtration: Pressure is applied to the water filter assembly (21) in the pressure filtration unit (2) to form a filter cake with a target water content in the slurry in the water filter assembly (21); Release the pressure on the water filtration assembly (21); Vibrating unloading: Open the water filter assembly (21) to unload the material and put the filter press unit (2) in a free-moving state; control the vibrating device (3) to lift the water filter assembly (21) to a specified height, and then control the vibrating device (3) to remove the lifting force on the water filter assembly (21), so that the water filter assembly (21) can fall freely until it hits the filter plate (22).

8. The filter press unloading method according to claim 7, characterized in that, The filter pressing step further includes pressing at least one groove into the filter cake.

9. The filter press unloading method according to claim 7, characterized in that, The flexible filter element is a filter bag (212), the internal space of the filter bag (212) forms the filter chamber, the lower opening of the filter bag (212) forms a discharge port (2121), and the filter bag (212) is provided with a feed inlet (2122) communicating with the filter chamber; the side of the filter plate (22) facing the filter bag (212) is a filter pressing surface, and the filter pressing surface is provided with an elastic sealing element (23) and a separator (24). The elastic sealing element (23) is configured to press the opening side of the filter bag (212) to close the discharge port (2121), and the separator (24) divides the filter pressing surface into at least two filter pressing areas; The pressure filtration step specifically includes: S11: Control the filter plate (22) to move a first stroke toward the filter bag (212), so that the elastic sealing member (23) presses the opening side of the filter bag (212) to close the discharge port (2121), thereby forming a closed filter chamber inside the filter bag (212); S12: Inject the target amount of slurry into the filter chamber; S13: Control the filter plate (22) to move a second stroke toward the filter bag (212) so that the filter plate (22) applies pressure to the filter bag (212). During this process, the water in the slurry is released through the filter bag (212), the solid matter in the slurry forms a filter cake, and the separator (24) presses at least one groove on the filter cake.

Images