A new type of disc filter

Abstract

A novel disc filter includes a transmission mechanism, a distribution head, a slurry tank, several filter discs, a scraper device, a central shaft assembly, and a fixing mechanism. Compared with a variable cross-section flow channel welded from steel plates, the circular flow channel cross-section can more precisely match different materials, resulting in better flowability of filtrate and gas, greatly reducing energy consumption, and significantly reducing the welding workload during the manufacturing of the flow channel tube, saving a lot of manpower and resources. Multiple circumferentially divided movable pressure plates with bolt holes are connected to partitions to fix the fan-shaped plate plane to the ring plate, ensuring the flatness of the entire filter disc and providing sufficient conditions for scraper unloading.

Description

Technical Field

[0001] This invention belongs to the field of filter technology, and mainly relates to a novel disc filter. Background Technology

[0002] Disc filters are widely used in the filtration and separation of solid particles with different material properties in industries such as mining, power, chemical, and environmental protection.

[0003] The disc filter uses an auxiliary vacuum pump to create negative pressure, and multiple sector-shaped plates fixedly mounted on a central shaft are fitted with filter cloth to form a filter disc. The filter disc rotates in the slurry tank, and solid particles form a filter cake on the filter cloth. The filtrate is drawn out of the slurry tank by negative pressure and flows sequentially through the sector-shaped plates, the central shaft, and the distribution head to an external filtrate storage tank. After the filter cake is dried, it reaches the discharge point, where it is discharged by a scraper discharge device and a blower-assisted discharge device. The solid particles are removed from the filter cloth, thus achieving solid-liquid separation.

[0004] The main components of a traditional disc filter include a central shaft with a welded steel plate filter channel, an integrated distribution head, a fan-shaped plate made of polymer material and a steel frame, a slurry tank assembled entirely by welding steel plates, a scraper unloading device, and a blower-assisted unloading device.

[0005] Differences in raw ore quality and production process control between different mines result in variations in material properties, particularly in density, particle size, and particle size distribution, which significantly impact the operating conditions of disc filters. Traditional disc filters currently face several pressing challenges that need to be addressed.

[0006] 1. Traditional steel plate welded flow channel center shaft structure has high energy consumption and is prone to corrosion. After severe corrosion, problems such as flow channel gas leakage, liquid leakage, and low vacuum will occur, which are difficult to solve, ultimately rendering the structure unusable. This structure cannot be repaired, resulting in the scrapping of the entire center shaft.

[0007] Second, the fan-shaped plate structure composed of polymer materials and a surrounding steel frame has poor flatness, and the way it is fixed to the central axis makes it difficult to ensure the flatness of the entire filter plate.

[0008] Third, uneven filter cake thickness or large thickness fluctuations are likely to occur. The original structure of the scraper device is difficult to adjust, and there may be situations where the material cannot be scraped or the scraped amount is too small. This causes instability in the important indicator of the disc filter's production capacity, and the existing scraper device has a short lifespan.

[0009] 4. When used with highly abrasive materials, the sealing surface of the integrated distributor head connected to the central shaft is prone to wear, which can cause the various compartments of the distributor head to communicate with each other, resulting in liquid and air leakage, affecting the filtration performance. Severe wear can render the entire distributor head unusable, and it is also difficult to replace the distributor head later due to the installation location.

[0010] Fifth, the original blowing device was intended to assist in unloading and also regenerate the filter cloth during the blowing process. However, the filter cloth regeneration function was weak for materials that were difficult to filter, resulting in rapid clogging and breakage of the filter cloth, short service life, frequent replacement of the filter cloth, and increased operating costs. When the old filter was shut down, the slurry tank had to be filled with clean water. When the filter cloth was continuously cleaned by blowing air, the fan-shaped plate was located above the discharge bin, and a large amount of water would fall into the discharge bin during the blowing process, which seriously affected the filter cake conveyor in the discharge bin.

[0011] Because traditional disc filters are unstable in operation, especially important production indicators such as capacity and moisture content are difficult to meet the requirements, which will seriously affect the entire production system. Summary of the Invention

[0012] To overcome the aforementioned shortcomings, this invention provides a novel disc filter that can adapt to the filtration and dewatering of materials across multiple industries, particularly suitable for mining materials that are highly abrasive, difficult to filter, and require high equipment performance. It solves the problems of poor material adaptability, poor component replaceability, severe disc misalignment, short filter cloth lifespan, and high maintenance costs associated with traditional disc filters.

[0013] The technical solution adopted by this invention to solve its technical problem is as follows:

[0014] A new type of disc filter includes

[0015] Transmission mechanism;

[0016] Distribution Header;

[0017] Slurry tank, used to hold slurry;

[0018] Several filter discs, wherein each filter disc is composed of multiple sector plates;

[0019] A scraper device is used to scrape off the material on both sides of the filter disc;

[0020] The central shaft assembly includes:

[0021] A central tube with a flange at one end is driven by the transmission mechanism.

[0022] Several flow channels are evenly distributed on the outer circumference of the central shaft by fixing clips. One end of each flow channel is welded to the flange of the central tube. The flange is connected to the distribution plate, and the distribution plate is connected to the distribution head.

[0023] Several small filtrate tubes are arranged at equal intervals along the flow channel tube and are threaded to the flow channel tube;

[0024] A fixing mechanism is used to fix the sector plate, the fixing mechanism comprising:

[0025] Several ring plates are equally spaced on the outer circle of the central tube, and the ring plates have several equally spaced bolt holes along the circumferential direction;

[0026] Several partitions, each partition having studs on both sides, the studs on one side of the partition passing through the bolt holes of the ring plate and being locked with nuts, and a sector plate being provided between adjacent partitions;

[0027] Several pressure plates are provided, each with a bolt hole in the middle. A stud on the other side of the partition plate passes through the bolt hole of the pressure plate and is locked with a nut, thereby pressing the sector plate against the ring plate.

[0028] The sector plate comprises two symmetrical halves of steel mesh welded together to form a filter plane. The space enclosed by the steel mesh is filled with polymer material. A filtrate tube is provided at the lower end of the steel mesh, and the filtrate tube is connected to a small filtrate tube on the flow channel tube through a rubber sleeve.

[0029] The scraper device is fixed to the side plate of the slurry tank and located at the unloading hopper, including:

[0030] A fixing seat fixed to the side plate of the slurry tank;

[0031] A plurality of scrapers, each scraper having a strip-shaped hole, and a clamping bolt passing through the strip-shaped hole to fix the scraper to the fixing base; the end of the scraper near the filter disc has a wear-resistant material.

[0032] A fixing nut is fixed on the fixing base, and the fixing nut has a tightening bolt threaded to it, the screw of the tightening bolt pressing against the lower end of the scraper.

[0033] The dispensing head includes a dispensing head valve body and a detachable connecting plate, which is fixed to the flange of the dispensing head valve body by bolts.

[0034] The blowing zone and transition zone of the distribution head are connected to compressed air pipelines, and valves are installed on both pipelines.

[0035] Due to the adoption of the technical solution described above, the present invention has the following advantages:

[0036] Compared to variable cross-section flow channels welded from steel plates, circular flow channel cross-sections can more precisely match different materials, providing better flowability for filtrate and gas, significantly reducing energy consumption, and drastically reducing welding work during flow channel tube manufacturing, saving considerable manpower and resources. Multiple circumferentially divided movable pressure plates with bolt holes connect to the partitions, fixing the fan-shaped plate plane to the ring plate, ensuring the flatness of the entire filter disc and providing sufficient conditions for scraper unloading.

[0037] Second, the fan-shaped plate structure not only ensures the flatness of the entire filter disc to prevent severe overall swaying, but also enables scraper unloading, reducing the moisture content of the filter cake and the overall energy consumption of the equipment. Furthermore, the internal polymer material not only increases the overall wear resistance of the fan-shaped plate, but also reduces vacuum energy consumption. It is also more suitable for highly abrasive filter materials, greatly increasing the service life of the fan-shaped plate.

[0038] Third, the segmented design of the scraper device, which changes from a single scraper to a combination of several scrapers, greatly increases the convenience of adjustment. The scraper tip is made of wear-resistant material, which significantly extends the life of the scraper device. During maintenance, only the worn wear-resistant material needs to be replaced, effectively solving problems such as easy wear, deformation, and damage of the scraper. The ease of adjustment also avoids the problem of frequently tearing the filter cloth.

[0039] IV. Distribution Head Structure: The distribution head valve body adopts a streamlined design to facilitate the flow of gas and liquid, reducing the resistance to filtrate discharge and lowering the energy consumption of the equipment. The detachable connecting plate installed on the end face of the valve body avoids wear on the valve body. During maintenance, only the connecting plate needs to be replaced, making disassembly, replacement, and maintenance convenient and reducing the cost of use and maintenance.

[0040] Fifth, by utilizing the two-zone configuration of the distribution head, intermittent airflow is provided during operation, which not only increases equipment capacity but also extends the filter cloth life through regeneration. The new structure adds a transition zone for airflow, during which the fan-shaped plate is located in the slurry tank. When the machine stops, it works in conjunction with the ultrasonic cleaning device in the slurry tank to prevent water from the fan-shaped plate back-blowing onto the scraper and entering the discharge bin, thus avoiding impact on the operation and protection of the filter cake conveyor. Furthermore, it cleans the filter cloth more thoroughly, further extending its life and reducing the maintenance workload and production costs caused by frequent filter cloth replacements.

[0041] VI. By using the scraper device for long-term unloading and the blowing device for auxiliary unloading, the disturbance of the equipment's vacuum system caused by the continuous entry of compressed air into the central shaft vacuum cavity is greatly reduced during operation. This enables the equipment to operate in a high vacuum system, further ensuring the reduction of filter cake moisture content and the increase of production capacity. It also reduces the overall energy consumption of the equipment, resulting in significant economic benefits. Attached Figure Description

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 2 This is a side view of the central shaft assembly of the present invention;

[0044] Figure 3 This is a side view of the sector-shaped plate;

[0045] Figure 4 Schematic diagram of the scraper device;

[0046] Figure 5 Schematic diagram of the distribution head device;

[0047] Figure 6 Schematic diagram of the filter cloth regeneration cycle;

[0048] In the diagram: 1. Transmission mechanism; 2. Distributor head; 3. Central shaft assembly; 4. Filter disc; 5. Distributor disc; 6. Flange; 7. Scraper device; 8. Slurry tank; 9. Flow channel pipe; 10. Small filtrate pipe; 11. Sector plate; 12. Pressure plate; 13. Partition plate; 14. Central pipe; 15. Ring plate; 16. Steel mesh; 17. Polymer material; 18. Filtrate pipe; 19. Wear-resistant material; 20. Scraper; 21. Clamping bolt; 22. Tightening bolt; 23. Distributor head valve body; 24. Detachable connecting plate; 25. Transition zone; 26. Air blowing zone; 27. First valve; 28. Second valve; 29. ​​Compressed air. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0051] Combined with appendix Figure 1 The novel disc filter includes a transmission mechanism 1, a distribution head 2, a slurry tank 8, several filter discs 4, a scraper device 7, a central shaft assembly 3, and a fixing mechanism.

[0052] like Figure 2 As shown, the central shaft assembly 3 includes: a central tube 14, several flow channel tubes 9 and several small filtrate tubes 10.

[0053] Furthermore, one end of the central tube 14 has a flange, and the central tube 14 is driven by the transmission mechanism;

[0054] Furthermore, the flow channel 9 is made of seamless steel pipe. Compared with the variable cross-section flow channel made of traditional steel plate welding, the circular flow channel cross-section can more accurately match different materials, and the filtrate and gas have better flowability, greatly reducing energy consumption and significantly reducing the welding workload during the manufacturing of the flow channel, saving a lot of manpower and material resources. The plurality of flow channel pipes 9 are evenly distributed on the outer circumference of the central shaft 14 by fixing clips. One end of the flow channel pipe 9 is welded to the flange of the central pipe 14. The flange is connected to the distribution plate 5. The distribution plate 5 is connected to the distribution head 2. The distribution plate 5 adopts a two-half equally divided interlocking structure, which facilitates the replacement of the distribution plate 5 after wear.

[0055] Furthermore, the plurality of small filtrate tubes 10 are arranged at equal intervals along the flow channel tube 9 and are threaded to the flow channel tube 9.

[0056] like Figure 2 As shown, the fixing mechanism is used to fix the sector plate 11. The fixing mechanism includes: a plurality of ring plates 15, a plurality of partition plates 13 and a plurality of pressure plates 12.

[0057] Furthermore, the ring plate 15 is evenly spaced on the outer circle of the central tube 14, and the ring plate 15 has a plurality of bolt holes evenly spaced along the circumferential direction;

[0058] Furthermore, both sides of the partition 13 have studs. The stud on one side of the partition 13 passes through the bolt hole of the ring plate 15 and is locked with a nut. A fan-shaped plate 11 is provided between the adjacent partitions 13.

[0059] Furthermore, the pressure plate 12 has bolt holes in the middle. The studs on the other side of the partition plate 13 pass through the bolt holes of the pressure plate 12 and are locked with nuts, thereby pressing the sector plate 11 onto the ring plate 15. Since the sector plates are all pressed onto the ring plate 15, the flatness of the entire filter disc 5 can be guaranteed, preventing the filter disc 5 from swaying too much and providing sufficient conditions for the scraper 20 to unload material.

[0060] The filter disc 4 is composed of multiple sector-shaped plates 11, such as Figure 3 As shown, the sector plate 11 includes two symmetrical steel mesh halves 16 welded together to form a filter plane. The space enclosed by the steel mesh 16 is filled with polymer material 17. The polymer material 17 not only increases the overall wear resistance of the sector plate 11, but also reduces vacuum energy consumption and is more adaptable to highly abrasive filter materials, greatly increasing the service life of the sector plate 11. The lower end of the steel mesh 16 is provided with a filtrate pipe 18, which is connected to the small filtrate pipe 10 on the flow channel pipe 9 through a rubber sleeve.

[0061] like Figure 4As shown, the scraper device 7 is used to scrape off the material on both sides of the filter disc 4. The scraper device 7 is fixed on the side plate of the slurry tank 8, located at the unloading hopper, and includes: a fixing seat fixed on the side plate of the slurry tank and several scrapers 20. The multiple scrapers 20 greatly increase the convenience of adjustment and avoid the problem of frequently tearing the filter cloth. The scraper 20 has a strip-shaped hole, which is set along the width direction of the scraper 20. The clamping bolt 21 passes through the strip-shaped hole to fix the scraper 20 on the fixing seat. The end of the scraper 20 near the filter disc 4 has a wear-resistant material 19. The wear-resistant material 19 effectively extends the service life of the scraper device 7. During maintenance, only the worn wear-resistant material 19 needs to be replaced, and the problems of easy wear, deformation and damage are effectively solved.

[0062] A fixing nut is fixed on the fixing base, and the fixing nut has a tightening bolt 22 threaded to it. The screw of the tightening bolt 22 presses against the lower end of the scraper 20. By adjusting the tightening bolt 22 and the strip hole on the scraper 20, the gap between the scraper 20 and the filter disc 4 can be further adjusted to facilitate scraping material.

[0063] like Figure 5 As shown, the dispensing head 2 includes a dispensing head valve body 23 and a detachable connecting plate 24. The dispensing head valve body 23 has a streamlined design to facilitate liquid flow. The detachable connecting plate 24 is fixed to the flange of the dispensing head valve body 23 by bolts. During assembly of the entire device, the detachable connecting plate 24 is combined with the dispensing disc 5 of the central tube 14, but the joint surface between the two is a dynamic-static joint surface. The entire dispensing head 2 is fixed, while the dispensing disc 5 rotates with the central tube 14.

[0064] like Figure 6 As shown, the blowing zone 26 and the transition zone 25 of the distribution head 2 are simultaneously connected to the compressed air 29 pipeline, and valves are installed on the two pipelines respectively.

[0065] When the filter is running normally with material, the first valve 27 of the blowing zone 26 is opened, the second valve 28 of the transition zone 25 is closed, the auxiliary scraper 20 discharges material, and the filter cloth regeneration function is provided during operation.

[0066] When the filter stops feeding material, open the second valve 28 in the transition zone 25 and close the first valve 27 in the blowing zone 26. At this time, the slurry tank 8 is filled with clean cleaning water, which, in conjunction with the ultrasonic washing device installed in the slurry tank 8, cleans the filter cloth using air blowing and ultrasound while the filter disc is running under no-load conditions. This extends the service life of the filter cloth.

[0067] This design utilizes the two-zone configuration of the distribution head 2 to provide intermittent blowing during operation, which not only increases equipment capacity but also extends the filter cloth life through filter cloth regeneration. During blowing, the fan-shaped plate 11 is located in the slurry tank 8. When the machine stops, it works in conjunction with the ultrasonic cleaning device in the slurry tank 8 to prevent water from back-blowing onto the scraper 20 and entering the discharge bin, thus avoiding impact on the operation and protection of the filter cake conveyor. Furthermore, it cleans the filter cloth more thoroughly, further extending its life and reducing the maintenance workload and production costs caused by frequent filter cloth replacements.

[0068] By using the scraper device 7 for long-term unloading and the auxiliary unloading of the blowing device, the disturbance of the equipment's vacuum system caused by the continuous entry of compressed air 29 into the central tube vacuum cavity is greatly reduced during operation. This enables the equipment to operate in a high vacuum system, further ensuring the reduction of filter cake moisture content and the increase of production capacity. It also reduces the overall energy consumption of the equipment, resulting in significant economic benefits.

[0069] The parts not detailed above are existing technologies and therefore have not been described in detail.

Claims

1. A novel disc filter, characterized in that: include Transmission mechanism; Distribution Header; Slurry tank, used to hold slurry; Several filter discs, wherein each filter disc is composed of multiple sector plates; A scraper device is used to scrape off the material on both sides of the filter disc; The central shaft assembly includes: A central tube with a flange at one end is driven by the transmission mechanism. Several flow channels are evenly distributed on the outer circumference of the central shaft by fixing clips. One end of each flow channel is welded to the flange of the central tube. The flange is connected to the distribution plate, and the distribution plate is connected to the distribution head. Several small filtrate tubes are arranged at equal intervals along the flow channel tube and are threaded to the flow channel tube; A fixing mechanism is used to fix the sector plate, the fixing mechanism comprising: Several ring plates are equally spaced on the outer circle of the central tube, and the ring plates have several equally spaced bolt holes along the circumferential direction; Several partitions, each with studs on both sides, the studs on one side of the partition passing through the bolt holes of the ring plate and being locked with nuts, and a sector plate between adjacent partitions; Several pressure plates are provided, each with a bolt hole in the middle. A stud on the other side of the partition plate passes through the bolt hole of the pressure plate and is locked with a nut, thereby pressing the sector plate against the ring plate.

2. The novel disc filter according to claim 1, characterized in that: The sector plate comprises two symmetrical halves of steel mesh welded together to form a filter plane. The space enclosed by the steel mesh is filled with polymer material. A filtrate tube is provided at the lower end of the steel mesh, and the filtrate tube is connected to a small filtrate tube on the flow channel tube through a rubber sleeve.

3. The novel disc filter according to claim 1, characterized in that: The scraper device is fixed to the side plate of the slurry tank and located at the unloading hopper, including: A fixing seat fixed to the side plate of the slurry tank; A plurality of scrapers, each scraper having a strip-shaped hole, and a clamping bolt passing through the strip-shaped hole to fix the scraper to the fixing base; the end of the scraper near the filter disc has a wear-resistant material. A fixing nut is fixed on the fixing base, and the fixing nut has a tightening bolt threaded to it, the screw of the tightening bolt pressing against the lower end of the scraper.

4. The novel disc filter according to claim 1, characterized in that: The dispensing head includes a dispensing head valve body and a detachable connecting plate, which is fixed to the flange of the dispensing head valve body by bolts.

5. The novel disc filter according to claim 4, characterized in that: The blowing zone and transition zone of the distribution head are connected to compressed air pipelines, and valves are installed on both pipelines.

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