A partition-regulating dewatering device for filter press

Abstract

The application relates to the technical field of filter presses, in particular to a partition-regulating dehydration device of a filter press, which comprises a filter plate assembly, an air inlet mechanism and an air outlet channel, the filter plate assembly is composed of multiple filter plates, the surface of the filter plate is provided with uniformly-distributed grooves, the grooves are used for accommodating filter cakes, filter cavities are formed between adjacent filter plates, the air inlet mechanism comprises a blowing channel, the blowing channel is embedded in the filter plate, the filter plate is provided with uniformly-distributed blowing ports, the blowing channel is communicated with the filter cavities through the blowing ports, and the air outlet channel comprises an air outlet main pipe and air outlet branch pipes located at the bottom of the filter plate assembly; the air outlet branch pipes are communicated with the air outlet main pipe, and a concentrated-discharge air flow channel is formed. The application has the effects of realizing uniform air flow distribution, facilitating control of the moisture content of filter cakes, improving the utilization rate of compressed air and achieving remarkable energy-saving effects.

Description

Technical Field

[0001] This application relates to the technical field of filter presses, and in particular to a filter press zone-controlled dewatering device. Background Technology

[0002] In industries such as coal and chemicals, solid-liquid separation of fine particulate materials is one of the core technological processes. While traditional pressure filtration technology can achieve preliminary dewatering through mechanical pressure, its efficiency in removing capillary water and bound water within honeycomb structures is limited. Capillary water refers to water existing in the tiny pores of rocks or soil, influenced by surface tension, capillary forces, and adhesion. Bound water within honeycomb structures refers to water tightly adsorbed onto the solid surface through intermolecular forces within honeycomb porous materials (such as clay and gels).

[0003] To improve dehydration efficiency, air-assisted dehydration technology has received widespread attention in recent years. However, this technology suffers from problems such as high energy consumption and insufficient airflow uniformity. Given increasingly stringent environmental standards and continuously rising energy costs, developing new dehydration equipment that combines high efficiency and energy saving has become an urgent need for the industry.

[0004] Currently, the mainstream solution is the compressed air purging method. This method is widely used because it is easy to operate. After the filter press is completed, the filter chamber is kept sealed, and dry compressed air is introduced into the filter cake from one corner of the filter press plate. The air pressure is used to overcome the capillary resistance of the filter cake, allowing the air to penetrate the pores of the filter cake. The high-speed airflow carries the capillary water and some bound water out from the other corner of the diagonal. At the same time, the dry air also promotes the evaporation of a small amount of water on the surface, thereby increasing the final dryness of the filter cake and reducing its moisture content.

[0005] However, after compressed air enters the filter press chamber, it cannot guarantee that each filter cake receives uniform airflow penetration, especially in areas far from the airflow. Energy utilization is low, and a large amount of compressed air is discharged without effectively participating in dehydration, which also reduces the material dehydration efficiency. Utility Model Content

[0006] In order to improve the utilization rate of compressed air and thus improve the dewatering efficiency of materials, the purpose of this application is to provide a zone-controlled dewatering device for a filter press.

[0007] Includes filter plate assembly, air inlet mechanism and air outlet duct; The filter plate assembly consists of multiple filter plates, each with uniformly distributed grooves on its surface. These grooves are used to accommodate the filter cake, and a filter pressing cavity is formed between adjacent filter plates. The air inlet mechanism includes an air blowing channel, which is embedded inside the filter press plate. The filter press plate is provided with evenly distributed air blowing ports, and the air blowing channel is connected to the filter press chamber through the air blowing ports. The air outlet channel includes a main air outlet pipe and branch air outlet pipes located at the bottom of the filter plate assembly. The branch air outlet pipes are all connected to the main air outlet pipe to form a centralized airflow channel.

[0008] By adopting the above technical solution, the air inlet is set on the filter press plate and connected to the air blowing channel embedded inside the filter press plate, so that the airflow directly reaches the filter chamber, achieving uniform airflow distribution. At the same time, compressed air can uniformly penetrate each filter cake, improving the utilization rate of compressed air and significantly improving the dehydration efficiency. The main exhaust pipe centrally collects moisture, avoiding secondary pollution. The zoned design can specifically address the differences in moisture content of filter cakes in different areas, while centralized discharge simplifies the system structure and reduces energy consumption and maintenance costs.

[0009] Optionally, the air outlet is oriented towards the filter cake accumulation area inside the filter press chamber, and the air outlet penetrates the filter press plate and is located on the groove surface of the filter press plate.

[0010] By adopting the above technical solution, the air outlet is directly opened on the grooved surface of the filter plate and faces the filter cake accumulation area, realizing vertical penetration of the airflow to the filter cake. This design avoids ineffective diffusion of airflow in the cavity and maximizes the use of air pressure to remove moisture; at the same time, the opening on the grooved surface shortens the airflow path, reduces air pressure loss, and ensures that energy is efficiently converted into kinetic energy for dehydration, which is especially suitable for deep dehydration of high-viscosity materials.

[0011] Optionally, a sealing flange is provided on the plate surface surrounding the groove surface of the filter press plate, and the sealing flanges of adjacent filter press plates are connected by an elastic sealing element.

[0012] By employing the above technical solution, the combination of the sealing flange and the elastic seal dynamically maintains the airtightness of the filter press chamber during high-pressure filtration. The elastic seal compensates for the minor deformation of the filter plates during pressing, preventing air pressure drop caused by purge air leakage; at the same time, it isolates cross-flow between adjacent filter press chambers, ensuring an independent and controllable dewatering environment for each zone and avoiding local airflow interference that could affect the overall dewatering uniformity. It also effectively prevents material leakage during filling.

[0013] Optionally, filter paper is laid on the grooved surface of the filter press plate, and the edge of the filter paper is fixedly connected to the inner side of the sealing flange, thereby covering the grooved surface.

[0014] By adopting the above technical solution, the filter paper is fixed to the groove surface and its edges are anchored to the inside of the sealing flange, forming a stable covering layer to optimize the solid-liquid separation process. This structure prevents filtrate leakage caused by filter paper displacement or wrinkles, improving filtration accuracy; the direct contact between the filter paper and the filter cake facilitates overall peeling during unloading, reducing filter cake residue; the fixed design of the sealing flange also simplifies the filter paper replacement process and reduces downtime.

[0015] Optionally, the air intake mechanism further includes an air intake main pipe and multiple air intake branch pipes, each air intake branch pipe being configured in correspondence with a filter press plate, and each air intake branch pipe being connected to the air intake main pipe; the air blowing channel is connected to the corresponding air intake branch pipe.

[0016] By adopting the above technical solution, the main air inlet duct provides a centralized air source, and the independent air inlet branch pipes corresponding to each filter press plate are used for precise air diversion. This ensures that the airflow in the blowing channel can reach the corresponding filter press plate efficiently, evenly and independently, thereby significantly improving the efficiency and uniformity of the entire filter press system for blowing drying or cleaning. At the same time, its structure is clear and highly modular, which also facilitates installation, maintenance and targeted control.

[0017] Optionally, an independent control valve is provided at the connection between the air inlet branch pipe and the air inlet main pipe. The control valve is a pneumatic angle seat valve or a solenoid valve.

[0018] By adopting the above technical solutions, independent control valves (such as pneumatic angle seat valves / solenoid valves) are installed on the air inlet branch pipes, giving the system the ability to dynamically adjust the air volume of each zone. For filter cake characteristics (such as thickness and moisture content) of different filter chambers, the air pressure and duration can be adjusted differentially to avoid over-blowing or under-blowing; the automated valves respond quickly, laying the hardware foundation for intelligent zone control.

[0019] Optionally, the air inlet branch pipe of the filter press is connected in parallel to the main air inlet pipe through a detachable pipe joint.

[0020] By adopting the above technical solution, the detachable pipe joint connects the air inlet branch pipe and the main pipe, significantly improving the efficiency of modular maintenance. In the event of a single filter press plate failure, it can be quickly disassembled and replaced without affecting the overall airflow, reducing downtime losses; the parallel structure also facilitates the expansion of the number of filter press plates, adapting to the needs of flexible capacity adjustment.

[0021] Optionally, a filtrate collection pipeline is also included, which is located below the filter press chamber and is used to collect the filtrate filtered out by the filter press chamber.

[0022] By adopting the above technical solution, a dedicated filtrate collection pipeline is located below the filter press chamber, achieving solid-liquid separation and efficient resource recovery. Centralized filtrate collection avoids secondary contamination of the filter cake, ensuring dewatering quality; the separate pipeline design facilitates targeted filtrate treatment (such as recycling or purified discharge), meeting clean production requirements.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The air inlet is located on the grooved surface of the filter press plate, connecting with the inlet branch pipe and the air blowing channel embedded inside the filter press plate. This allows the airflow to directly reach the filter chamber, achieving uniform airflow distribution. Simultaneously, compressed air can penetrate each filter cake evenly, improving compressed air utilization and significantly enhancing dehydration efficiency. By configuring each filter press plate with an independent inlet branch pipe connected to the main inlet pipe, and simultaneously setting up a centralized outlet channel, precise zoned air supply and unified exhaust gas discharge are achieved. The zoned design can address the differences in moisture content of filter cakes in different areas, while centralized discharge simplifies the system structure and reduces energy consumption and maintenance costs. 2. By directionally opening the air outlets on the grooved surface of the filter press plate and pointing directly at the filter cake accumulation area, vertical airflow penetration is achieved for efficient dewatering, avoiding air pressure loss; combined with the dynamic airtight design of the sealing flange and elastic seal, it ensures no leakage during high-pressure purging and maintains the independence of the zones; the filter paper fixedly laid on the grooved surface improves filtration accuracy and unloading convenience. The three work together to significantly enhance the uniformity of dewatering and energy conversion efficiency. 3. Independent control valves and zoned airflow adjustment functions extending to the control panel support dynamic and precise air delivery for different filter cake characteristics; detachable pipe joints provide modular maintenance and expansion capabilities for the air intake system; and a dedicated filtrate collection pipeline enables efficient solid-liquid separation and resource recovery. These four elements together construct a closed-loop system for intelligent zoned control, rapid maintenance, and clean production, comprehensively improving system adaptability and operational economy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the filter press dewatering device of this application; Figure 2 This is a cross-sectional view of a portion of the filter press plates in their closed state. Figure 3 yes Figure 2 A magnified view of part A in the middle; Figure 4 Schematic diagram of the cross-sectional structure of the filter plate assembly and the air outlet duct; Figure 5 yes Figure 4 A magnified view of part B in the middle section; In the picture, 1. Filter plate assembly; 11. Filter press plate; 111. Groove; 112. Air outlet; 12. Filter press chamber; 2. Air intake mechanism; 21. Main air intake pipe; 22. Branch air intake pipe; 23. Air blowing channel; 24. Control valve; 3. Air outlet duct; 31. Main air outlet duct; 32. Branch air outlet duct; 4. Hydraulic mechanism; 5. Pulling plate mechanism; 51. Slide rail; 52. Moving part; 53. Actuating piece; 54. Actuating plate. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0026] A filter press zone-controlled dewatering device, referring to Figure 1 and Figure 2 It includes a filter plate assembly 1, an air inlet mechanism 2, and an air outlet channel 3. The filter plate assembly 1 is composed of multiple filter press plates 11, which are arranged sequentially on the frame of the filter press and parallel to the pressure direction. The central axes of the filter press plates 11 coincide, and the surface of the filter press plates 11 is provided with grooves 111 for accommodating filter cake. When two adjacent filter press plates 11 are close together, a filter pressing chamber 12 is formed between them.

[0027] The air inlet mechanism 2 includes air inlet branch pipes 22, air inlet main pipe 21, and air blowing channel 23. Multiple air inlet branch pipes 22 are provided, each corresponding to a filter press plate 11. The air inlet branch pipes 22 are located above the filter press plate 11 and are all connected to the air inlet main pipe 21. The air blowing channel 23 is embedded inside the filter press plate 11 and is connected to the corresponding upper air inlet branch pipe 22. The filter press plate 11 is also provided with air outlets 112, and the air blowing channel 23 is connected to the filter press chamber 12 through the air outlets 112. At this time, compressed air flows from the air inlet main pipe 21 to the air inlet branch pipes 22, then to the air blowing channel 23, and finally reaches the filter press chamber 12 through the air outlets 112, forming a continuous channel. This channel allows airflow to travel directly from the main air inlet 21 to the filter press chamber 12, while the airflow is evenly distributed through the air outlet 112. Compressed air can penetrate each filter cake evenly, improving the utilization rate of compressed air and significantly improving the dehydration efficiency.

[0028] After compressed air enters the filter press chamber 12 for dehydration, it is discharged from the air outlet duct 3. The air outlet duct 3 includes air outlet branch pipes 32 connected to each filter press chamber 12 and an air outlet main pipe 31 located at the bottom of the filter plate assembly 1. All air outlet branch pipes 32 are connected to the air outlet main pipe 31. The centralized air outlet duct 3 enables precise air supply to different zones and unified exhaust gas discharge; the air outlet main pipe 31 centrally collects moisture to avoid secondary pollution. The zoned design can specifically address the differences in moisture content of the filter cake in different areas, while centralized discharge simplifies the system structure and reduces energy consumption and maintenance costs.

[0029] Furthermore, the air inlet branch pipes 22 of the filter press plate 11 are connected in parallel to the main air inlet pipe 21 via detachable pipe joints. This design significantly improves modular maintenance efficiency. In the event of a failure of a single filter press plate 11, it can be quickly disassembled and replaced without affecting the overall airflow, reducing downtime losses; the parallel structure also facilitates the expansion of the number of filter press plates 11, adapting to the need for flexible adjustment of production capacity.

[0030] Reference Figure 2 and Figure 3 Multiple air outlets 112 are provided on the filter press plate 11 and are evenly distributed on the filter press plate 11. The opening direction of the air outlets 112 is towards the filter cake accumulation area in the filter press chamber 12, and the air outlets 112 penetrate the filter press plate 11. This achieves vertical penetration of the airflow to the filter cake. This design avoids ineffective diffusion of airflow in the chamber and maximizes the use of air pressure to remove moisture; at the same time, the opening on the groove 111 shortens the airflow path and reduces air pressure loss.

[0031] Reference Figure 1 and Figure 2 When the filter press starts working, the hydraulic mechanism 4, such as the hydraulic press, applies a clamping force to the filter plates 11. Under this clamping state, the filter plates 11 are pressed together, forming a filter chamber 12 between two adjacent filter plates 11. At this time, the main air inlet pipe 21 delivers compressed air, which passes through each air inlet branch pipe 22 to the air blowing channel 23 in the corresponding filter plate 11, thereby increasing the pressure in the air blowing channel 23. Subsequently, there are material filling holes between the filter plates 11. Multiple holes form channels with the filter chambers 12 for material filling and movement. The material is poured from one end of the filter plate 11 to the other end, filling each filter chamber 12 completely. When the last filter chamber 12 is reached, since the last filter plate 11 has no through holes, filling stops after the material is full.

[0032] Furthermore, to prevent material leakage from the gap between the edges of the two filter plates 11 during filling of the filter press chamber 12, and also to prevent compressed air leakage from the gap, sealing flanges are provided on the outer surface of the groove 111 of the filter plates 11. The sealing flanges of adjacent filter plates 11 are connected by elastic seals, dynamically maintaining the airtightness of the filter press chamber 12 during high-pressure filtration. The elastic seals compensate for the slight deformation of the filter plates 11 during compression, preventing air pressure drop due to purge air leakage, and also effectively preventing material leakage during filling.

[0033] Furthermore, to prevent material from entering the blowing channel 23 from the air outlet 112 and blocking the air outlet 112 when filling the filter press chamber 12, filter paper is laid on the surface of the groove 111 of the filter press plate 11, and the edge of the filter paper is fixedly connected to the inner side of the sealing flange, thereby covering the surface of the groove 111. The filter paper effectively blocks the material from entering the blowing channel 23. At the same time, after the material is dewatered, it will become a filter cake. The filter paper is in direct contact with the filter cake, which facilitates the overall peeling during unloading and reduces filter cake residue.

[0034] After the material fills the filter press chamber 12, the compressed air performs the first filtration and dewatering on the material due to the high pressure in the air blowing channel 23 inside the filter press plate 11. Because of this high pressure, the filtered water has difficulty entering the filter press plate 11 through the air blowing port 112. A second filtration and dewatering process is then performed, increasing the compressed air volume to continuously blow the material and remove moisture using air pressure.

[0035] Furthermore, refer to Figure 2 An independent control valve 24 is provided at the connection between the air inlet branch pipe 22 and the air inlet main pipe 21. The control valve 24 can be a pneumatic angle seat valve or a solenoid valve, giving the system the ability to dynamically adjust the air volume of each zone. For filter cake characteristics (such as thickness and moisture content) of different filter chambers 12, the air pressure and duration can be adjusted differently to avoid over-blowing or under-blowing.

[0036] Furthermore, refer to Figure 4 and Figure 5 The device also includes a filtrate collection pipeline located below the filter press chamber 12 to collect the filtrate filtered out by the chamber. The filtrate collection pipeline shares a common channel with the air outlet duct 3. The dedicated filtrate collection pipeline located below the filter press chamber 12 enables solid-liquid separation and efficient resource recovery. Centralized filtrate collection avoids secondary contamination of the filter cake and ensures dewatering quality.

[0037] Similarly, the filtrate collection pipeline can also be set up independently.

[0038] Reference Figure 1 Finally, the dewatering process is completed. The hydraulic mechanism 4 retracts, releasing the clamping force on the filter press plate 11. The plate pulling mechanism 5 separates the filter press plate 11. The plate pulling mechanism 5 is located on both sides of the device. The plate pulling mechanism 5 includes a slide rail 51, a moving part 52, a deflecting piece 53, and a deflecting plate 54. The slide rail 51 is horizontally located on both sides of the device. The deflecting plate 54 is located on both sides of the filter press plate 11. The deflecting piece 53 is located on the moving part 52 and close to the deflecting plate 54. The moving part 52 can move horizontally on the slide rail 51. The moving part 52 moves sequentially to the closest filter press plate 11 and then moves back. The deflecting piece 53 abuts against the deflecting plate 54 on the side of the filter press plate 11, pulling the filter press plate 11 apart sequentially. Then the filter cake on the filter paper is detached and collected. The above operation is repeated to prepare for the next material dewatering process.

[0039] The implementation principle of this application embodiment is as follows: the filter press plates 11 are pressed tightly together, compressed air is introduced from the main air inlet pipe 21, passes through the air inlet branch pipe 22 to reach the corresponding filter press plates 11, and enters the air blowing channel 23 inside the filter press plates 11. Then the material fills the filter press chamber 12 for the first filtration. After that, the amount of compressed air is increased, and the airflow is uniformly and omnidirectionally penetrating the material through the air blowing port 112. The air pressure is used to remove moisture. The air and moisture are collected or discharged together from the air outlet channel 3 below the filter press chamber 12 and the filtrate collection pipeline, thus completing the dehydration process of the material. Finally, the filter press plates 11 are separated, the filter cake on the filter paper is removed, and the filter cake is collected for the next dehydration.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A zone-controlled dewatering device for a filter press, characterized in that, It includes a filter plate assembly (1), an air inlet mechanism (2), and an air outlet channel (3); The filter plate assembly (1) is composed of multiple filter press plates (11). The surface of the filter press plate (11) is provided with uniformly distributed grooves (111). The grooves (111) are used to accommodate the filter cake, and a filter press cavity (12) is formed between adjacent filter press plates (11). The air inlet mechanism (2) includes an air blowing channel (23), which is embedded inside the filter press plate (11). The filter press plate (11) is provided with evenly distributed air blowing ports (112), and the air blowing channel (23) is connected to the filter press chamber (12). The air outlet channel (3) includes an air outlet main pipe (31) and an air outlet branch pipe (32) located at the bottom of the filter plate assembly (1). The air outlet branch pipe (32) is connected to the air outlet main pipe (31) to form a centralized airflow channel.

2. The filter press zone-controlled dewatering device according to claim 1, characterized in that, The opening direction of the air outlet (112) is towards the filter cake accumulation area in the filter press chamber (12). The air outlet (112) penetrates the filter press plate (11) and is set on the groove (111) surface of the filter press plate (11).

3. The filter press zone-controlled dewatering device according to claim 2, characterized in that, The filter press plate (11) has a sealing flange on the outer surface of the groove (111) surface, and the sealing flanges of adjacent filter press plates (11) are connected by elastic sealing elements.

4. The filter press zone-controlled dewatering device according to claim 3, characterized in that, Filter paper is laid on the groove (111) surface of the filter press plate (11), and the edge of the filter paper is fixedly connected to the inner side of the sealing flange, thereby covering the groove (111) surface.

5. A filter press zone-controlled dewatering device according to claim 1, characterized in that, The air intake mechanism (2) also includes an air intake main pipe (21) and multiple air intake branch pipes (22). The air intake branch pipes (22) are arranged one-to-one with the filter press plate (11), and the air intake branch pipes (22) are all connected to the air intake main pipe (21). The air blowing channel (23) is connected to the corresponding air intake branch pipe (22).

6. A filter press zone-controlled dewatering device according to claim 5, characterized in that, An independent control valve (24) is provided at the connection between the air inlet branch pipe (22) and the air inlet main pipe (21). The control valve (24) is a pneumatic angle seat valve or a solenoid valve.

7. A filter press zone-controlled dewatering device according to claim 1, characterized in that, The air inlet branch pipe (22) of the filter press plate (11) is connected in parallel to the air inlet main pipe (21) through a detachable pipe joint.

8. A filter press zone-controlled dewatering device according to claim 1, characterized in that, It also includes a filtrate collection pipeline, which is located below the filter press chamber (12) and is used to collect the filtrate filtered out by the filter press chamber (12).

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