A plate-and-frame filter press

Abstract

The utility model provides a kind of plate-and-frame filter press, belong to material dehydration pretreatment field.The filter press includes extrusion hammer, top filter plate, conveyor belt device, extrusion base and control system, extrusion hammer, top filter plate, conveyor belt device and extrusion base are sequentially spaced from top to bottom, conveyor belt device has the supporting surface for supporting filter residue, extrusion hammer is located above supporting surface, the driving part of conveyor belt device is located at both ends of conveyor belt device, conveyor belt device is provided with rotating shaft and rotating plate along width direction, rotating plate rotates around rotating shaft, one end of conveyor belt device is provided with filter cloth reel, the outlet of filter cloth reel is provided with channel plate connected with rotating plate, control system is connected with extrusion hammer, the driving part of conveyor belt device, rotating shaft, filter cloth reel signal respectively.The filter press provided by the utility model embodiment can solve the problem of large floor area and low work efficiency in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of dewatering and pretreatment of materials such as livestock and poultry manure, biogas project residue, and sludge, and in particular to a plate and frame filter press. Background Technology

[0002] Plate and frame filter presses are widely used in the fields of livestock and poultry manure dewatering, biogas project sludge dewatering, and sludge dewatering. They are characterized by wide applicability, simple operation, good filtration effect, low filter cake moisture content, and energy saving and environmental protection.

[0003] However, traditional models are typically horizontally arranged and use lateral pressure to compress materials with high moisture content. This compression process requires a continuous input of electrical energy to provide mechanical power, and they occupy a large area. Furthermore, traditional models operate intermittently, requiring manual removal of the filter cake and replacement of the filter cloth after each filtration cycle. This not only increases labor intensity but also necessitates machine shutdown during cake removal and cloth replacement, preventing continuous operation and thus limiting throughput. In addition, cleaning and replacing the filter cloth is time-consuming, labor-intensive, and requires certain skills and experience, resulting in high labor costs and maintenance difficulties.

[0004] The plate and frame filter press in the existing technology has a large footprint and low working efficiency because it uses a transverse extrusion device and requires manual replacement of filter cloth, which leads to interruption of continuous operation. Utility Model Content

[0005] This utility model provides a plate and frame filter press that solves the problems of large footprint and low working efficiency in the prior art. The technical solution is as follows:

[0006] A plate and frame filter press includes: extrusion hammers, a top filter plate, a conveyor belt, an extrusion base, and a control system.

[0007] The extrusion hammer, top filter plate, conveyor belt device, and extrusion base are arranged sequentially from top to bottom at intervals. The conveyor belt device has a support surface for supporting the filter cake. The extrusion hammer is located above the support surface. The drive unit of the conveyor belt device is located at both ends of the conveyor belt device. The conveyor belt device is provided with a rotating shaft and a rotating plate along its width direction. The rotating plate rotates around the rotating shaft. A filter cloth roll is provided at one end of the conveyor belt device. A channel plate connected to the rotating plate is provided at the outlet of the filter cloth roll. The control system is connected to the extrusion hammer, the drive unit of the conveyor belt device, the rotating shaft, and the filter cloth roll via signals.

[0008] Optionally, a cutting device is provided at the outlet of the filter cloth roll, and the cutting device is signal-connected to the control system.

[0009] Optionally, a scraper is provided at one end of the conveyor belt device, the scraper is signal-connected to the control system, and the scraper is configured to abut or separate from the conveyor belt device.

[0010] Optionally, rotatable filter cloth clips are provided on both sides of the bottom of the conveyor belt device in the extending direction.

[0011] Optionally, a cleaning water inlet pipe is provided at the other end of the conveyor belt device, the cleaning water inlet pipe is positioned towards the conveyor belt device, and the cleaning water inlet pipe is signal-connected to the control system.

[0012] Optionally, a filter cloth cleaning brush is provided at the other end of the conveyor belt device. The filter cloth cleaning brush is signal-connected to the control system and is configured to abut or separate from the conveyor belt device.

[0013] Optionally, multiple conveyor belt devices are provided, and the multiple conveyor belt devices are arranged at intervals along the vertical direction, and the spacing between the multiple conveyor belt devices is adjustable.

[0014] Optionally, it also includes a plurality of vertically arranged feeding channels, which are spaced apart along the length of the conveyor belt device.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0016] This utility model provides a plate and frame filter press. Before the filtration operation begins, filter cloth needs to be wound onto a conveyor belt. The control system controls the conveyor belt to rotate, so that the rotating shaft and rotating plate are located near one end of the filter cloth roll. Then, the control system controls the rotating shaft to rotate, so that the rotating plate aligns with the channel plate. Then, the control system controls the filter cloth roll to rotate and release the cloth, so that the end of the filter cloth moves from the channel plate to the rotating plate. Then, the control system controls the rotating plate to rotate and fit against the conveyor belt. The filter cloth is clamped and fixed on the conveyor belt. After the conveyor belt rotates one revolution, a new layer of filter cloth is covered on the surface of the conveyor belt. After the filtration process begins, high-moisture-content material is added between the top filter plate and the conveyor belt. The control system activates the extrusion hammers to squeeze the top filter plate from top to bottom, then the conveyor belt, and finally the material collides with the extrusion base, thus achieving dewatering of the high-moisture-content material. After a period of filtration, the filter cloth becomes ineffective, and the process of wrapping the filter cloth is repeated, ensuring that there is always a new filter cloth on the conveyor belt for filtration, reducing downtime for filter cloth replacement. Furthermore, this plate and frame filter press adopts a vertical layout design, cleverly reducing the floor space required. Unlike existing plate and frame filter presses that rely entirely on electricity or other fossil fuels for extrusion power, this plate and frame filter press utilizes the gravity advantage of the extrusion hammers and the stable support of the extrusion base to achieve highly efficient and energy-saving filtration and dewatering. It features energy conservation and environmental protection, effectively solving the problems of large floor space and low working efficiency in existing technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure from a front cross-section provided in an embodiment of this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the conveyor belt device provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the cooperation between the conveyor belt device and the filter cloth roll provided in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the filter cloth roll structure provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the bottom structure of the conveyor belt device provided in this embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the left cross-section of the conveyor belt device provided in this embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of signal transmission provided in an embodiment of the present invention.

[0025] In the diagram: 1001-Filter press chamber; 1002-Filter cloth; 1-Extrusion hammer; 2-Top filter plate; 3-Conveyor belt device; 31-Rotating shaft; 32-Rotating plate; 33-Filter cloth retainer strip; 4-Extrusion base; 5-Control system; 6-Filter cloth roll; 61-Channel plate; 62-Cutting device; 63-Filter cloth outlet; 7-Scraper; 8-Clean water inlet pipe; 9-Filter cloth cleaning brush; 10-Feed channel; 101-Feed inlet. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure from a front cross-section provided in an embodiment of this utility model; Figure 2 This is a cross-sectional schematic diagram of the conveyor belt device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cooperation between the conveyor belt device and the filter cloth roll provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the filter cloth roll structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the bottom structure of the conveyor belt device provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the left cross-section of the conveyor belt device provided in this embodiment of the utility model; Figure 7 This is a schematic diagram of signal transmission provided by an embodiment of this utility model. (See diagram below.) Figures 1 to 7 The plate and frame filter press shown includes: a pressing hammer 1, a top filter plate 2, a conveyor belt device 3, a pressing base 4, and a control system 5. The pressing hammer 1, the top filter plate 2, the conveyor belt device 3, and the pressing base 4 are arranged sequentially from top to bottom at intervals. The conveyor belt device 3 has a supporting surface for supporting filter cake. The pressing hammer 1 is located above the supporting surface. The drive unit of the conveyor belt device 3 is located at both ends of the conveyor belt device 3. The conveyor belt device 3 is provided with a rotating shaft 31 and a rotating plate 32 along the width direction. The rotating plate 32 rotates around the rotating shaft 31. A filter cloth roll 6 is provided at one end of the conveyor belt device 3. A channel plate 61 connected to the rotating plate 32 is provided at the outlet of the filter cloth roll 6. The control system 5 is connected to the pressing hammer 1, the drive unit of the conveyor belt device 3, the rotating shaft 31, and the filter cloth roll 6 respectively.

[0028] Exemplarily, in this embodiment of the present invention, a filter press chamber 1001 is also included. The filter press chamber 1001 is located on the extrusion base 4, and the top filter plate 2 and the conveyor belt device 3 are located inside the filter press chamber 1001. The two ends of the conveyor belt device 3 protrude from the filter press chamber 1001 for docking with external equipment such as the filter cloth roll 6. The outer wall of the filter press chamber 1001 has a foldable structure. When the extrusion hammer 1 extrudes the top filter plate 2 and the conveyor belt device 3, the space between the top filter plate 2 and the conveyor belt device 3 is compressed, and the outer wall of the filter press chamber 1001 bends to achieve dewatering of materials with high moisture content. Figure 1 and Figure 6 The section with the cross-section in the middle is the conveyor belt device 3. The specific structure of the conveyor belt device 3 is as follows: Figure 2 and Figure 3 As shown, Figure 2 This is a cross-sectional view of the rotating shaft 31 in its non-working state. Figure 3 This is a cross-sectional view of the rotating shaft 31 during operation. Figure 3 The designation 1002 refers to the new filter cloth emerging from filter cloth roll 6. For example... Figure 5As shown, the width of the rotating plate 32 is smaller than the width of the conveyor belt device 3, meaning there is a certain margin on both sides of the rotating plate 32. This arrangement ensures that the rotating plate 32 will not affect the normal operation of the conveyor belt device 3. When the rotating shaft 31 rotates, the tilt angle of the rotating plate 32 is the same as that of the channel plate 61. The filter cloth roll 6 and the channel plate 61 are fixedly installed outside the filter press chamber 1001. A rotary motor is installed inside the filter cloth roll 6, and a conveyor belt is also installed on the channel plate 61. Through the cooperation of the rotary motor and the conveyor belt, the filter cloth can be conveyed from inside the filter cloth roll 6 through the channel plate 61 to the rotating plate 32. When the rotating shaft 31 is rotated again, the end of the filter cloth is clamped and fixed by the rotating plate 32. At this time, rotating the conveyor belt device 3 allows the new filter cloth to be wound around the outside of the conveyor belt device 3. A telescopic rod structure is provided on the extrusion hammer 1, allowing the extrusion hammer 1 to perform reciprocating motion in the vertical direction. A bracket and support plate structure are also provided for placing the extrusion hammer 1 when it is stopped. During the dewatering process of materials with high moisture content, the conveyor belt device 3 does not rotate. After a period of filtration, the conveyor belt device 3 rotates once to cover its surface with a new layer of filter cloth, and then the filtration process can continue. Compared to traditional technologies where the machine needs to be stopped to replace the filter cloth and remove the filter cake each time, the filter press in this embodiment can automatically remove the filter cake and replace the filter cloth, greatly reducing labor intensity. At the same time, this filter press can complete the removal of the filter cake and replacement of the filter cloth without stopping the machine, enabling continuous and stable operation and effectively improving processing efficiency. Unlike existing plate and frame filter presses which are horizontally arranged, this system cleverly reduces the footprint by designing the plate and frame filter press mechanism vertically. Furthermore, unlike existing plate and frame filter presses which rely entirely on electricity or other fossil fuels for extrusion power, this plate and frame filter press utilizes the gravity advantage of the extrusion hammer 1 and the stable support of the extrusion base 4 to achieve highly efficient and energy-saving filtration and dewatering, exhibiting energy-saving and environmentally friendly characteristics. Furthermore, after dewatering, the material is smoothly conveyed to the filter press chamber 1001 via the conveyor belt device 3. Simultaneously, combined with the up-and-down movement mechanism of the extrusion hammer 1, continuous unloading is achieved, further optimizing the entire processing flow. This facilitates its widespread application in fields such as livestock and poultry manure dewatering, biogas project residue dewatering, and sludge dewatering.

[0029] The plate and frame filter press provided in this embodiment requires the filter cloth to be wound on the conveyor belt device 3 before the filtration operation begins. The control system 5 controls the rotation of the conveyor belt device 3 so that the rotating shaft 31 and the rotating plate 32 are located near one end of the filter cloth roll 6. Then, the control system 5 controls the rotating shaft 31 to rotate so that the rotating plate 32 aligns with the channel plate 61. Then, the control system controls the filter cloth roll 6 to rotate and release the cloth so that the end of the filter cloth moves from the channel plate 61 to the rotating plate 32. Then, the control system controls the rotating plate 32 to rotate and fit against the conveyor belt device 3. The filter cloth is clamped and fixed on the conveyor belt device 3. After the conveyor belt device 3 rotates one revolution, a new layer of filter cloth is covered on the surface of the conveyor belt device 3. After the filter press operation begins, high-moisture-content material is added between the top filter plate 2 and the conveyor belt device 3. The starting system 5 controls the extrusion hammer 1 to extrude the top filter plate 2 from top to bottom, then the conveyor belt device 3, and finally collide with the extrusion base 4. This process extrudes the high-moisture-content material to achieve dehydration. After a period of filtration, the filter cloth becomes ineffective. The process of wrapping the filter cloth is repeated, ensuring that there is always a new filter cloth on the conveyor belt device 3 for filtration. This reduces downtime for replacing the filter cloth and effectively solves the problem of low working efficiency in the existing technology.

[0030] Optionally, a cutting device 62 is provided at the outlet of the filter cloth roll 6, and the cutting device 62 is connected to the control system 5 via signal.

[0031] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, after multiple turns of filter cloth are wound on the conveyor belt device 3, the internal space of the filter press may be compressed, requiring cleaning of the inside of the filter press. This necessitates cutting the filter cloth. In this embodiment, a filter cloth outlet 63 is provided on the filter cloth roll 6, and a cutting device 62 is located inside the filter cloth outlet 63. The cutting device 62 has a serrated structure and is located on one side of the filter cloth outlet 63. When cutting is required, the control system 5 controls the cutting device 62 to move from one side of the filter cloth outlet 63 to the other side, thereby cutting the filter cloth. The cutting device 62 can also be any other structure capable of cutting the filter cloth; no specific limitation is made in this embodiment.

[0032] Optionally, a scraper 7 is provided at one end of the conveyor belt device 3. The scraper 7 is connected to the control system 5 via a signal and is configured to abut or separate from the conveyor belt device 3.

[0033] Exemplary, in embodiments of this utility model, such as Figure 1As shown, by setting up the scraper 7, the failed filter cloth and filtered material on the conveyor belt device 3 can be removed. When removal is required, the control system 5 controls the scraper 7 to come into contact with the surface of the conveyor belt device 3, and the conveyor belt device 3 is started to rotate. After the conveyor belt device 3 rotates one revolution, the scraper 7 removes the failed filter cloth and filtered material from the surface of the conveyor belt device 3. Then, after the conveyor belt device 3 is returned to its original position, the rotating shaft 31 is controlled to open the rotating plate 32, which, together with the filter cloth roll 6 and the channel plate 61, allows new filter cloth to be wound around the outside of the conveyor belt device 3. By setting up this structure, the outside of the conveyor belt device 3 is always only wound with one turn of filter cloth, thereby reducing the operating load of the filter press and realizing automatic unloading of the filter material, solving the problem of manual unloading in the past, improving the automation level of this filter press, and further improving the working efficiency of this filter press.

[0034] Optionally, rotatable filter cloth clips 33 are provided on both sides of the bottom of the conveyor belt device 3 in the extension direction.

[0035] Exemplary, in embodiments of this utility model, such as Figure 5 and Figure 6 As shown in the figure, label 1003 indicates the hinge point. Filter cloth clips 33 are located on both sides of the bottom of the conveyor belt device 3 and are hinged to the inner wall of the filter press chamber 1001. Each time a new filter cloth is replaced, the cutting device 62 cuts the filter cloth. Since the filter cloth has no adhesive properties, it only rests on the conveyor belt device 3, except for being clamped and fixed by the rotating plate 32. By setting filter cloth clips 33 on both sides of the bottom of the conveyor belt device 3, when a new filter cloth is installed, the filter cloth clips are rotated to move to a horizontal position, clamping the edge of the filter cloth located at the bottom of the conveyor belt device 3 between the filter cloth clips 33 and the bottom of the conveyor belt device 3. When the filter cloth needs to be replaced, the filter cloth clips 33 are rotated to a vertical position, facilitating the removal of the expired filter cloth. This structure allows the new filter cloth to be more stably fixed on the conveyor belt device 3, thereby improving the stability of the filter press.

[0036] Optionally, a cleaning water inlet pipe 8 is provided at the other end of the conveyor belt device 3. The cleaning water inlet pipe 8 is positioned towards the conveyor belt device 3 and is connected to the control system 5 via a signal.

[0037] For example, in this embodiment of the invention, the cleaning water comes from the water squeezed out of the material, and will not cause pollution to other water sources, such as... Figure 1 As shown, by setting up a cleaning water inlet pipe 8, the filter cloth located on the conveyor belt device 3 can be cleaned when the filter cloth is not too dirty, thereby extending the service life of the filter cloth and reducing the cost of filtration. On the other hand, it can also extend the replacement cycle of the filter cloth roll 6, further improving the working efficiency of this filter press.

[0038] Optionally, a filter cloth cleaning brush 9 is provided at the other end of the conveyor belt device 3. The filter cloth cleaning brush 9 is connected to the control system 5 via a signal and is configured to abut or separate from the conveyor belt device 3.

[0039] Exemplary, in embodiments of this utility model, such as Figure 1 As shown, by setting the filter cloth cleaning brush 9, the filter cloth located on the conveyor belt device 3 can be brushed and washed. When the filter cloth needs to be brushed and washed, the control system 5 controls the filter cloth cleaning brush 9 to come into contact with the filter cloth and rotate the conveyor belt device 3 one revolution, thereby cleaning the floating scum on the filter cloth. It can also be used in conjunction with the cleaning water inlet pipe 8 to rinse the filter cloth, thereby extending the service life of the filter cloth, reducing the cost of filtration, and extending the replacement cycle of the filter cloth roll 6, further improving the working efficiency of this filter press.

[0040] Optionally, multiple conveyor belt devices 3 are provided, and the multiple conveyor belt devices 3 are arranged at intervals along the vertical direction, and the spacing between the multiple conveyor belt devices 3 is adjustable.

[0041] For example, in this embodiment of the invention, after the extrusion hammer 1 moves downward to press the top filter plate 2, the top filter plate 2 continues to press downward to press the first conveyor belt device 3, and then sequentially presses multiple lower conveyor belt devices 3. By setting multiple conveyor belt devices 3, multiple filtration spaces are formed between them, allowing the filter press to simultaneously filter more high-moisture-content materials, achieving more materials for dewatering pretreatment, thereby further improving the working efficiency of the filter press. Since the multiple conveyor belt devices 3 are arranged vertically at intervals, compared to the traditional horizontal arrangement, it can greatly save floor space and reduce construction costs.

[0042] Optionally, it also includes a plurality of vertically arranged feeding channels 10, which are spaced apart along the length of the conveyor belt device 3.

[0043] Exemplary, in embodiments of this utility model, such as Figure 1 As shown, a feed inlet 101 is provided on the feed channel 10. High-moisture-content materials such as biogas residue, livestock manure, and sludge are added through the feed inlet 101. There are branch outlets between each conveyor belt device 3, so that the high-moisture-content materials can reach each layer of the filter press space. Adding high-moisture-content materials from only one feed channel 10 may result in uneven distribution of high-moisture-content materials in the filter press space, thus affecting the filter press efficiency. By setting multiple feed channels 10, high-moisture-content materials can be added simultaneously from multiple feed inlets 101, making the high-moisture-content materials in the filter press space more uniform, thereby further improving the working efficiency of this filter press.

[0044] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plate and frame filter press, characterized in that, include: The components include an extrusion hammer (1), a top filter plate (2), a conveyor belt device (3), an extrusion base (4), and a control system (5). The extrusion hammer (1), top filter plate (2), conveyor belt device (3) and extrusion base (4) are arranged sequentially from top to bottom. The conveyor belt device (3) has a support surface for supporting filter residue. The extrusion hammer (1) is located above the support surface. The drive unit of the conveyor belt device (3) is located at both ends of the conveyor belt device (3). The conveyor belt device (3) is provided with a rotating shaft (31) and a rotating plate (32) along the width direction. The rotating plate (32) rotates around the rotating shaft (31). A filter cloth roll (6) is provided at one end of the conveyor belt device (3). A channel plate (61) connected to the rotating plate (32) is provided at the outlet of the filter cloth roll (6). The control system (5) is connected to the extrusion hammer (1), the drive unit of the conveyor belt device (3), the rotating shaft (31), and the filter cloth roll (6) respectively.

2. A plate and frame filter press according to claim 1, characterized in that, A cutting device (62) is provided at the outlet of the filter cloth roll (6), and the cutting device (62) is connected to the control system (5) via signal.

3. A plate and frame filter press according to claim 2, characterized in that, A scraper (7) is provided at one end of the conveyor belt device (3). The scraper (7) is connected to the control system (5) by signal. The scraper (7) is configured to abut or separate from the conveyor belt device (3).

4. A plate and frame filter press according to claim 2, characterized in that, The conveyor belt device (3) has rotatable filter cloth clips (33) on both sides of its bottom in the extending direction.

5. A plate and frame filter press according to claim 1, characterized in that, The other end of the conveyor belt device (3) is provided with a cleaning water inlet pipe (8), which is positioned toward the conveyor belt device (3) and is signal-connected to the control system (5).

6. A plate and frame filter press according to claim 5, characterized in that, The other end of the conveyor belt device (3) is provided with a filter cloth cleaning brush (9), which is connected to the control system (5) by signal. The filter cloth cleaning brush (9) is configured to abut or separate from the conveyor belt device (3).

7. A plate and frame filter press according to claim 1, characterized in that, Multiple conveyor belt devices (3) are provided, and the multiple conveyor belt devices (3) are arranged at intervals along the vertical direction. The spacing between the multiple conveyor belt devices (3) is adjustable.

8. A plate and frame filter press according to claim 1, characterized in that, It also includes multiple vertically arranged feeding channels (10), which are spaced apart along the length of the conveyor belt device (3).

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