Sludge dewatering high pressure filter press

Abstract

The utility model provides a kind of sludge dewatering high-pressure filter press, it is related to sludge dewatering technical field, including two vertical boards, two the vertical board between and close to bottom two corners place are fixedly connected with limiting rod, the surface of the limiting rod is equipped with and slidingly connected with moving plate at equal intervals, the top of the moving plate is fixedly connected with U-shaped plate, the inside of the U-shaped plate is respectively embedded with first filter plate and second filter plate, the surface of the first filter plate and second filter plate is equipped with filter groove, the center of the second filter plate is equipped with square cavity, the inside of the square cavity and close to center place are fixedly connected with baffle, the square cavity and filter groove are fixedly connected with diaphragm. In the utility model, by the nested connection of U-shaped plate, slot, panel, filter plate can be quickly embedded, extracted, without disassembling a large number of peripheral components, greatly shorten installation and disassembly time, reduce worker operation difficulty, improve operation efficiency, guarantee equipment quick recovery operation.

Description

Technical Field

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

[0002] With accelerated urbanization and industrial expansion, wastewater discharge has surged, leading to a rapid increase in sludge production. Sludge, a byproduct of wastewater treatment, is rich in heavy metals, pathogens, and organic matter. If discharged directly or landfilled without effective treatment, it will pollute soil and water sources, threatening the ecosystem and human health. Meanwhile, driven by environmental policies promoting "reduction, harmlessness, and resource utilization," sludge requires deep dewatering to reduce disposal costs (such as landfill space requirements and incineration energy consumption), creating conditions for subsequent resource utilization (brick making, biomass energy, etc.). High-pressure filter presses for sludge dewatering, due to their efficient ability to achieve deep sludge dewatering, have become key equipment in the sludge treatment industry chain.

[0003] Traditional filter press plates use rigid, integrated connections. Installation requires aligning complex connection structures (such as multiple layers of bolts and nested slots) one by one, which demands high precision from workers and is time-consuming. During disassembly, due to the effects of sludge hardening and residual pressure, the filter plates are difficult to separate from the supports and connecting parts, often requiring the disassembly of a large number of surrounding components. This process is cumbersome and seriously affects the continuity of production. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology where filter plates of filter presses are rigid and integrated, and installation requires one-by-one alignment of complex connection structures (such as multi-layer bolts and nested slots), which requires high precision operation from workers and is time-consuming. Therefore, a high-pressure filter press for sludge dewatering is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sludge dewatering high-pressure filter press, comprising two vertical plates, with limiting rods fixedly connected between the two vertical plates and near their bottom corners. Movable plates are slidably connected to the surfaces of the limiting rods at equal intervals. A U-shaped plate is fixedly connected to the top of each movable plate. A first filter plate and a second filter plate are embedded inside the U-shaped plate, respectively. Filter grooves are formed on the surfaces of the first and second filter plates. A square cavity is formed at the center of the second filter plate. A partition is fixedly connected inside the square cavity near its center. A diaphragm is fixedly connected between the square cavity and the filter groove. A groove is formed on the bottom inner wall of the U-shaped plate, and a mounting plate is embedded inside the groove. The top of the mounting plate is fixedly connected to the bottom of the first and second filter plates.

[0006] Preferably, the bottom of the vertical plate and near both ends are fixedly connected to support legs, and the bottom of each support leg is trapezoidal.

[0007] Preferably, an inclined plate is fixedly connected between the supporting legs.

[0008] Preferably, both ends of the U-shaped plate are fixedly connected to movable blocks, a sliding rod is slidably connected through the center of the movable block, and both ends of the sliding rod are fitted with and fixedly connected to fixed blocks, and the fixed blocks are fixedly connected to the vertical plate.

[0009] Preferably, a cylinder is connected through and fixedly connected to the center of the partition and the diaphragm, and a circular hole is opened at the center of each of the first filter plates. A feed hole is opened at the center of one of the vertical plates, and the feed hole is aligned with the cylinder and the circular hole.

[0010] Preferably, a drain head is installed at the bottom of the panel near the center, and the drain head is in communication with the filter tank.

[0011] Preferably, a hydraulic cylinder is fixedly connected through and to the center of another vertical plate, and the output end of the hydraulic cylinder is fixedly connected to the first filter plate.

[0012] Preferably, the inner walls on both sides of the U-shaped plate and near the top are provided with limiting grooves, and limiting plates are embedded in the limiting grooves. The limiting plates are fixedly connected to the first filter plate and the second filter plate respectively.

[0013] Preferably, the square cavity has air inlets at the top and on both sides of the partition, and the top of the first filter plate and the second filter plate are fixed and connected to air inlets.

[0014] Preferably, a drain pipe is fixedly connected to one end of the U-shaped plate near the bottom, and the drain pipe is in communication with the groove.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, by means of the nested connection of U-shaped plate, groove and plate, the filter plate can be quickly inserted and pulled out without disassembling a large number of peripheral parts, which greatly shortens the installation and disassembly time, reduces the difficulty of operation for workers, improves the efficiency of operation and maintenance, and ensures that the equipment can be quickly restored to operation.

[0017] 2. In this utility model, the limiting rod, moving plate, sliding rod and other components work together to provide stable support and precise guidance for the filter plate. During the filtration process, the filter plate is not easy to shift or shake, ensuring the sealing performance and filtration effect of the filter plate under high pressure. The nested structure disperses pressure, reduces the risk of deformation and damage to the filter plate and connecting components, and extends the service life of the equipment.

[0018] 3. In this utility model, the modular design makes the filter plates, U-shaped plates, and inserts universal, and the number and layout of filter plates can be flexibly adjusted according to the sludge treatment volume and characteristics; different specifications of filter plates are suitable for various sludge working conditions, improving the applicability of the equipment to complex production scenarios and reducing the cost of equipment procurement and replacement. Attached Figure Description

[0019] Figure 1 This utility model provides a three-dimensional view of the overall structure of a high-pressure filter press for sludge dewatering;

[0020] Figure 2 This utility model provides a partial three-dimensional structural view of a high-pressure filter press for sludge dewatering;

[0021] Figure 3 This utility model provides a three-dimensional view of a U-shaped plate structure for a high-pressure filter press for sludge dewatering;

[0022] Figure 4 This utility model provides a partial structural cross-sectional view of a high-pressure filter press for sludge dewatering;

[0023] Figure 5 This utility model presents a three-dimensional view of the filter plate structure of a high-pressure filter press for sludge dewatering.

[0024] Legend: 1. Vertical plate; 2. Support leg; 3. Inclined plate; 4. Hydraulic cylinder; 5. Limiting rod; 6. Moving plate; 7. U-shaped plate; 8. Moving block; 9. Slide rod; 10. Fixed block; 11. First filter plate; 12. Second filter plate; 13. Filter tank; 14. Square cavity; 15. Partition plate; 16. Diaphragm; 17. Cylinder; 18. Round hole; 19. Insert plate; 20. Drain head; 21. Insert groove; 22. Limiting groove; 23. Limiting plate; 24. Air inlet pipe; 25. Air inlet hole; 26. Feed inlet hole; 27. Drain pipe. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] Example 1, as Figure 1-5As shown, this utility model provides a sludge dewatering high-pressure filter press, including two vertical plates 1. Limiting rods 5 are fixedly connected between the two vertical plates 1 and near the bottom corners. Moving plates 6 are slidably connected to the surfaces of the limiting rods 5 at equal intervals. U-shaped plates 7 are fixedly connected to the top of the moving plates 6. A first filter plate 11 and a second filter plate 12 are respectively embedded inside the U-shaped plates 7. Filter grooves 13 are opened on the surfaces of the first filter plate 11 and the second filter plate 12. A square cavity 14 is opened at the center of the second filter plate 12. A partition plate 15 is fixedly connected inside the square cavity 14 and near the center. A diaphragm 16 is fixedly connected between the square cavity 14 and the filter groove 13. A groove 21 is opened on the bottom inner wall of the U-shaped plate 7. A mounting plate 19 is embedded inside the groove 21. The top of the mounting plate 19 is fixedly connected to the bottom of the first filter plate 11 and the second filter plate 12.

[0028] The overall effect of Embodiment 1 is that limiting rods 5 are fixedly connected between the two vertical plates 1 and near the bottom two corners. Movable plates 6 are slidably connected and evenly spaced on the surface of the limiting rods 5, which can limit the moving plates 6 by the limiting rods 5. U-shaped plates 7 are fixedly connected to the top of the moving plates 6. The first filter plate 11 and the second filter plate 12 are respectively embedded in the U-shaped plates 7. Filter grooves 13 are opened on the surface of the first filter plate 11 and the second filter plate 12, which can embed the sludge into the filter grooves 13 for dewatering. The effect is achieved by providing a square cavity 14 at the center of the second filter plate 12, with a partition 15 fixedly connected inside the square cavity 14 near the center, and a diaphragm 16 fixedly connected between the square cavity 14 and the groove 21. The bottom inner wall of the U-shaped plate 7 has a groove 21, and a panel 19 is embedded inside the groove 21. The top of the panel 19 is fixedly connected to the bottom of the first filter plate 11 and the second filter plate 12, which can achieve the effect of embedding the first filter plate 11 and the second filter plate 12 into the U-shaped plate 7 and embedding the panel 19 into the groove 21.

[0029] Example 2, as Figure 1-5As shown, support legs 2 are fixedly connected to the bottom and near both ends of the vertical plate 1, and the bottom of each support leg 2 is trapezoidal; inclined plates 3 are fixedly connected between the support legs 2; movable blocks 8 are fixedly connected to both ends of the U-shaped plate 7, and a sliding rod 9 is slidably connected through the center of the movable block 8, and fixed blocks 10 are sleeved and fixedly connected to both ends of the sliding rod 9, and the fixed blocks 10 are fixedly connected to the vertical plate 1; a cylinder 17 is slidably connected through the center of the partition plate 15 and the diaphragm 16, and a circular hole 18 is opened in the center of each of the first filter plates 11, and a feed hole 26 is opened in the center of one of the vertical plates 1, and the feed hole 26 is aligned with the cylinder 17 and the circular hole 18; a drain head 2 is installed at the bottom and near the center of the insert plate 19. 0. The drain head 20 is connected to the filter tank 13. A hydraulic cylinder 4 is fixedly connected through the center of another vertical plate 1. The output end of the hydraulic cylinder 4 is fixedly connected to the first filter plate 11. Limiting grooves 22 are opened on both sides of the inner wall of the U-shaped plate 7 near the top. Limiting plates 23 are embedded in the inside of the limiting grooves 22. The limiting plates 23 are fixedly connected to the first filter plate 11 and the second filter plate 12 respectively. Air inlets 25 are opened on the top of the square cavity 14 and on both sides of the partition 15. Air inlets 24 are fixedly connected to the top of the first filter plate 11 and the second filter plate 12 at the air inlets 25. A drain pipe 27 is fixedly connected to one end of the U-shaped plate 7 near the bottom. The drain pipe 27 is connected to the groove 21.

[0030] The overall effect of embodiment 2 is as follows: Support legs 2 are fixedly connected to the bottom and near both ends of the vertical plate 1. The bottom of each support leg 2 is trapezoidal, which allows the support legs 2 to support the bottom of the vertical plate 1. An inclined plate 3 is fixedly connected between the support legs 2, which allows the sludge cake to fall onto the conveyor belt. Moving blocks 8 are fixedly connected to both ends of the U-shaped plate 7. A sliding rod 9 is slidably connected through the center of each moving block 8. Fixed blocks 10 are fitted and fixedly connected to both ends of the sliding rod 9. All 10 are fixedly connected to the vertical plate 1, which can limit the U-shaped plate 7 by the sliding rod 9 and the moving block 8; a cylinder 17 is fixedly connected through the center of the partition plate 15 and the diaphragm 16; a round hole 18 is opened in the center of the first filter plate 11, and a feed hole 26 is opened in the center of one of the vertical plates 1. The feed hole 26 is aligned with the cylinder 17 and the round hole 18 to facilitate feeding; a drain head 20 is installed at the bottom of the insert plate 19 and near the center. The drain head 20 is connected to the filter tank 13. The connection allows water in the filter tank 13 to be drained into the embedded groove 21. A hydraulic cylinder 4 is fixedly connected through the center of another vertical plate 1, and the output end of the hydraulic cylinder 4 is fixedly connected to the first filter plate 11, allowing the hydraulic cylinder 4 to push the first filter plate 11. Limiting grooves 22 are opened on both sides of the inner wall of the U-shaped plate 7 near the top, and limiting plates 23 are embedded in the limiting grooves 22. The limiting plates 23 are fixedly connected to the first filter plate 11 and the second filter plate 12 respectively, allowing the first filter plate 11 to be pushed. The first filter plate 11 and the second filter plate 12 have a limiting effect; air inlets 25 are provided on the top of the square cavity 14 and on both sides of the partition plate 15. The top of the first filter plate 11 and the second filter plate 12 are fixed and connected to the air inlets 25, which can bring water or gas into the square cavity 14; a drain pipe 27 is fixedly connected to one end of the U-shaped plate 7 near the bottom. The drain pipe 27 is connected to the groove 21, which can drain the water in the groove 21 from the drain pipe 27.

[0031] Working principle: The equipment uses two vertical plates 1 as the main frame, and the bottom support legs 2 form a trapezoidal structure to stably support the whole machine. The inclined plate 3 provides a guiding foundation for subsequent unloading. Multiple U-shaped plates 7 are fitted onto the limiting rods 5 through the bottom moving plates 6, and the moving blocks 8 at both ends are slidably connected to the sliding rods 9 to form a filter plate assembly that can be flexibly opened and closed. The first filter plate 11 and the second filter plate 12 are embedded into the grooves 21 of the U-shaped plates 7 through the bottom insert plates 19. At the same time, the limiting plates 23 on both sides are engaged in the limiting grooves 22 to ensure that the filter plates 13 do not shift during high-pressure operation. At this time, the filter plate assembly is in a loose state, waiting for sludge to be fed. The sludge to be treated is pressurized by the external pump and injected from the feed hole 26 of one of the vertical plates 1. It is then evenly distributed into the filter grooves 13 of all the filter plates through the round hole 18 of the first filter plate 11 and the cylinder 17 of the second filter plate 12. At this time, the hydraulic cylinder 4 starts and pushes the first filter plate 11, causing the entire filter plate assembly to move along the limit rod 5 and slide rod 9 towards the other side of the vertical plate 1 until all filter plates are tightly fitted together, forming a closed filtration space, preparing for subsequent filtration and pressing. The sludge in the filter tank 13 is subjected to the feeding pressure and the pressure of the filter plates fitting together. The water in the sludge passes through the filter cloth into the bottom of the filter tank, then flows into the groove 21 of the U-shaped plate 7 through the drain head 20 at the bottom of the insert plate 19, and finally is discharged from the equipment through the drain pipe 27, completing the initial solid-liquid separation. At this time, the solid particles in the sludge are trapped in the filter tank 13, gradually forming a filter cake. When the initial filtration reaches a certain level, high-pressure water or compressed air is introduced into the square cavity 14 of the second filter plate 12 through the air inlet pipe 24. The square cavity 14 is divided into two areas by the partition plate 15. The high-pressure medium acts evenly on the diaphragm 16, causing it to expand towards the filter tank 13, performing a secondary pressing on the formed filter cake. This process significantly squeezes out residual water from the filter cake, further reducing the sludge moisture content and achieving deep dewatering. The water produced during pressing is also discharged through the drain head 20 and drain pipe 27. After pressing, the hydraulic cylinder 4 retracts, causing the filter plate assembly to loosen along the limit rod 5 and slide rod 9, creating gaps between the filter plates. At this point, the dewatered filter cake falls from the filter tank 13 due to its own weight and slides down the inclined plate 3 to the external conveying equipment, completing the unloading. After unloading, the equipment can restart the hydraulic cylinder 4 to push the filter plate assembly to close, entering the next sludge dewatering cycle.

[0032] The wiring diagram of the hydraulic cylinder 4 in this utility model is common knowledge in the field, and its working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring layout of the hydraulic cylinder 4 will not be explained in detail.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A sludge dewatering high-pressure filter press, comprising two vertical plates (1), characterized in that: Limiting rods (5) are fixedly connected between the two vertical plates (1) and near the bottom corners. Moving plates (6) are slidably connected to the surfaces of the limiting rods (5) at equal intervals. U-shaped plates (7) are fixedly connected to the top of the moving plates (6). A first filter plate (11) and a second filter plate (12) are embedded in the interior of the U-shaped plates (7). Filter grooves (13) are opened on the surfaces of the first filter plate (11) and the second filter plate (12). A square cavity (14) is opened at the center of the second filter plate (12). A partition plate (15) is fixedly connected inside the square cavity (14) and near the center. A diaphragm (16) is fixedly connected between the square cavity (14) and the filter groove (13). A groove (21) is opened on the bottom inner wall of the U-shaped plate (7). A plate (19) is embedded inside the groove (21). The top of the plate (19) is fixedly connected to the bottom of the first filter plate (11) and the second filter plate (12).

2. The sludge dewatering high-pressure filter press according to claim 1, characterized in that: The bottom of the vertical plate (1) and near both ends are fixedly connected to support legs (2), and the bottom of the support legs (2) is trapezoidal.

3. The sludge dewatering high-pressure filter press according to claim 2, characterized in that: An inclined plate (3) is fixedly connected between the supporting legs (2).

4. The sludge dewatering high-pressure filter press according to claim 1, characterized in that: Both ends of the U-shaped plate (7) are fixedly connected to movable blocks (8), and a sliding rod (9) is slidably connected through the center of the movable block (8). Both ends of the sliding rod (9) are fitted with and fixedly connected to fixed blocks (10), and the fixed blocks (10) are fixedly connected to the vertical plate (1).

5. The sludge dewatering high-pressure filter press according to claim 1, characterized in that: A cylinder (17) is connected through and fixedly connected to the center of the partition (15) and the membrane (16). A round hole (18) is opened at the center of the first filter plate (11). A feed hole (26) is opened at the center of one of the vertical plates (1). The feed hole (26) is aligned with the cylinder (17) and the round hole (18).

6. The sludge dewatering high-pressure filter press according to claim 1, characterized in that: A drain head (20) is installed at the bottom and near the center of the panel (19), and the drain head (20) is in communication with the filter tank (13).

7. The sludge dewatering high-pressure filter press according to claim 1, characterized in that: A hydraulic cylinder (4) is fixedly connected through and fixedly connected to the center of another vertical plate (1), and the output end of the hydraulic cylinder (4) is fixedly connected to the first filter plate (11).

8. The sludge dewatering high-pressure filter press according to claim 1, characterized in that: Limiting grooves (22) are provided on both inner walls of the U-shaped plate (7) and near the top. Limiting plates (23) are embedded inside the limiting grooves (22). The limiting plates (23) are fixedly connected to the first filter plate (11) and the second filter plate (12) respectively.

9. A sludge dewatering high-pressure filter press according to claim 1, characterized in that: The square cavity (14) has air inlets (25) on the top and on both sides of the partition (15). The first filter plate (11) and the second filter plate (12) are fixed and connected to the air inlets (25) by air inlet pipes (24).

10. A sludge dewatering high-pressure filter press according to claim 1, characterized in that: A drain pipe (27) is fixedly connected to one end of the U-shaped plate (7) near the bottom, and the drain pipe (27) is connected to the groove (21).

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