A disc filtration system

Abstract

This utility model belongs to the technical field of mineral processing equipment and discloses a disc filtration system. A central shaft is rotatably mounted in a slurry tank, and multiple filtrate pipes are arranged circumferentially around the central shaft. Multiple filter components are arranged axially along the central shaft, each including multiple filter fans arranged circumferentially along the central shaft and connected to the corresponding filtrate pipes. Each filter fan is covered with filter cloth and rotates with the central shaft via the filtrate pipes. An air distribution mechanism is fitted to the end of the central shaft and connected to the filtrate pipes. Negative pressure and positive pressure components are respectively fitted to the air distribution mechanism. This utility model adds an outer filter cloth to the filter fan and correspondingly sets up a positive pressure air path. When the filter fan carrying the filter cake enters a specific unloading position, the system introduces a positive pressure airflow into the filter fan. The expansion and vibration effect generated by the airflow agitating the filter cloth causes the filter cake to break and peel off, thereby achieving efficient and non-destructive unloading, significantly improving the peeling rate and preventing filter fan damage.

Description

Technical Field

[0001] This utility model belongs to the field of mineral processing equipment technology, and in particular relates to a disc filter system. Background Technology

[0002] Disc filters are widely used in mineral processing due to their advantages such as continuous operation, large throughput per unit area, compact structure, and small footprint. During operation, the filter discs rotate through an adsorption station for adsorbing slag and an unloading station for removing filter cake with each revolution. At the adsorption station, negative pressure suction removes water from the slurry through the filtrate pipe, and the dewatered slag forms a filter cake on the surface of the filter discs. At the unloading station, a scraper typically removes the filter cake from the filter discs to complete the unloading operation. This cyclical operation enables continuous production.

[0003] However, using scraper unloading can easily lead to the filter cake not being completely removed, resulting in slag residue on the surface of the filter fan. It can also cause wear or damage to the filter fan itself, affecting the equipment's lifespan and filtration efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model discloses a disc filtration system, which adds an outer filter cloth to the filter fan and sets up a corresponding positive pressure air path. When the filter fan carrying the filter cake enters a specific unloading position, the system introduces a positive pressure airflow into the filter fan. The airflow agitates the filter cloth, causing it to expand and vibrate, which breaks and peels off the filter cake, thereby achieving efficient and non-destructive unloading, significantly improving the peeling rate and preventing damage to the filter fan.

[0005] The specific technical solution of this utility model is as follows: A disc filtration system, comprising: Slurry tank; A central shaft is rotatably mounted in a slurry tank, and multiple filter pipes are arranged circumferentially on the central shaft. Multiple filter components are arranged axially along a central axis. Each filter component includes multiple filter fans arranged circumferentially along the central axis and connected to the corresponding filtrate pipes. The filter fans are covered with filter cloth and rotate with the central axis via the filtrate pipes. An unloading station and an adsorption station are provided along the rotation path of the filter components. A gas distribution mechanism, wherein the end of the gas distribution mechanism is engaged with the central shaft and connected to the filter pipe; The negative pressure component and the positive pressure component are respectively coordinated with the gas distribution mechanism.

[0006] The gas distribution mechanism draws air from any filter fan at the adsorption station to create negative pressure, and when the filter fan is at the unloading station, it introduces positive pressure airflow into the filter fan while maintaining negative pressure on other filter fans.

[0007] In this application, each filter assembly rotates in a circle around its central axis. During this rotation, each filter fan moves cyclically between the adsorption station and the unloading station, i.e., adsorption station - unloading station - adsorption station - unloading station... When any filter fan is at the adsorption station, the air distribution mechanism draws the slurry in the slurry tank under negative pressure, and water is discharged from the filtrate pipe, while the slag is adsorbed onto the filter cloth. During the rotation of the filter fan, there is a period of time when it is above the liquid level in the slurry tank. At this time, the negative pressure continuously draws water from the slag on the filter fan, causing the slag to dry and form a filter cake. At this time, the filter cake can move with the filter fan to the unloading station. When it reaches the unloading station, the air distribution mechanism introduces a positive pressure airflow, causing the filter cloth to expand and vibrate under the impact of the airflow, thereby achieving the purpose of unloading the ore and realizing the unloading of the filter fan.

[0008] Preferably, the gas distribution mechanism includes: A fixed distribution head is located at the end of the central shaft and is rotatably connected to the central shaft. The distribution head is divided into a negative pressure chamber and a positive pressure chamber. The negative pressure chamber corresponds to the adsorption station, and the positive pressure chamber corresponds to the ore unloading station. A friction disc, wherein the friction disc is provided with multiple air holes respectively communicating with each filtrate tube, and the friction disc rotates with a central axis; and The gas distribution plate is connected to the distribution head. The end face of the gas distribution plate and the end face of the friction plate are slidably engaged. The gas distribution plate is provided with negative pressure holes and positive pressure holes. The negative pressure holes correspond to the negative pressure chamber, and the positive pressure holes correspond to the positive pressure chamber. The distribution head is connected to each filtrate tube through the gas distribution plate. The negative pressure component is connected to the negative pressure chamber, and the positive pressure component is connected to the positive pressure chamber.

[0009] The negative pressure chamber and the positive pressure chamber are independent of each other. Since the friction disc and the gas-dissipating disc have relative rotation, when the filter fan is located in the corresponding area, the filtrate pipe connected to the filter fan can connect to the negative pressure chamber or the positive pressure chamber, so that the pipe is in a negative pressure state or a positive pressure state, so as to realize the adsorption function or the ore unloading function.

[0010] Preferred options also include: A baffle is provided corresponding to the filter fan or filtrate tube; and A position sensor, in conjunction with a stop block, drives a positive pressure assembly to introduce positive pressure airflow into the filter fan located at the ore unloading station.

[0011] Unlike the negative pressure component, the positive pressure component does not run continuously, but only starts when the filter fan that needs to be unloaded enters the unloading station. Through the coordinated action of the position sensor and the baffle, the position of the filter fan is identified and the start and stop are controlled, thereby effectively reducing energy consumption while improving the expansion and vibration effect of instantaneous pressurization on the filter cloth.

[0012] Preferably, a transition station is also provided on the rotation path of the filter assembly, through which the filter fan enters the unloading station from the adsorption station. The distribution head is also divided into transition chambers, which correspond to transition workstations and are connected to the outside air. The air distribution plate is provided with a transition hole, which corresponds to the transition chamber. The opening size of the transition chamber is larger than the hole size of the transition hole.

[0013] When the filter fan is in the transition position, the negative pressure in the filter fan can be converted into normal pressure because the transition hole is connected to the outside air. It can then continue to rotate to the unloading position under normal pressure, and then the positive pressure airflow can be used to enter the filter fan, thereby improving the expansion and vibration effect of the filter cloth.

[0014] Preferably, the positive pressure chamber and the transition chamber are independent areas within the negative pressure chamber.

[0015] The negative pressure chamber can cover the entire filtrate tube, while the positive pressure chamber and transition chamber each cover a portion of the filtrate tube. In actual use, negative pressure is formed in the distribution head. Therefore, in order not to affect the pressurization of the transition chamber and the replenishment of the positive pressure chamber, the positive pressure chamber and transition chamber are separated at the corresponding positions of the negative pressure chamber. This ensures that, while maintaining negative pressure adsorption, the transition of a filter fan from negative pressure to normal pressure is not affected, nor is the transition of a filter fan from normal pressure to positive pressure.

[0016] Preferred options also include: A support base is provided on the mounting platform of the slurry tank, and the dispensing head is connected to the support base; A journal, the end of which is connected to the central shaft, and the journal and support seat are rotatably fitted. One end of the journal is provided with multiple gas distribution pipes corresponding to and communicating with the filtrate pipes. The other end of the journal is connected to the side of the friction disc away from the gas distribution plate, and the gas distribution pipes correspond one-to-one with the air holes of the gas distribution plate; and A drive mechanism, which is connected to the journal drive.

[0017] This structure is simple and can effectively support the central shaft, thus meeting the rotation and air distribution requirements of the filter fan.

[0018] Preferably, the negative pressure component includes: Drainage tank; and A negative pressure generating tank, which is connected to a negative pressure chamber and a drain tank.

[0019] In addition to providing a negative pressure environment for the filter fan, the negative pressure component can also be used to discharge the filtered liquid.

[0020] Preferably, one side of the slurry tank is configured as an unloading station, and multiple discharge holes are spaced apart at the unloading station, with the movement area of ​​the filter assembly formed between any two adjacent discharge holes.

[0021] The structure is simple and makes good use of the slurry tank, effectively saving space.

[0022] Preferred options also include: An overflow tank, which is connected to a slurry tank, is used to discharge excess slurry from the slurry tank.

[0023] When the filtration efficiency of the system decreases, the filtrate pipe may not drain in time, causing the slurry to rise. At this time, the slurry may overflow the slurry tank. Therefore, by setting up an overflow tank, excess slurry can be effectively discharged.

[0024] Preferably, both ends of the central shaft are provided with gas distribution mechanisms.

[0025] This structure can compensate for the insufficient air pressure at the far end, thereby enabling all filtration components along the axial direction of the filtrate tube to have good adsorption function, and also enabling the filter fan to achieve a good positive pressure state at the corresponding position.

[0026] Compared with existing technologies, this invention can achieve slag adsorption during the filtration process, forming a filter cake on the surface of the filter fan. At the unloading station, positive pressure airflow causes the filter cloth to expand and vibrate, breaking and detaching the filter cake, thus achieving efficient and thorough unloading. In this process, it can also effectively avoid scratching the surface of the filter fan. This invention achieves more precise air distribution balance by independently setting positive and negative pressure components, fundamentally solving the technical problem of incomplete unloading. In addition, this invention is equipped with a position sensor and multiple baffles, which precisely and efficiently drive the filter cloth to agitate rapidly through sensing, further improving unloading efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 This is a front view of the filtering component in an embodiment of this utility model; Figure 3 This is a top view of the filtering component in an embodiment of the present invention; Figure 4 This is a bottom view of the filter assembly in an embodiment of the present invention; Figure 5 This is a left view of the filtering component in an embodiment of the present invention; Figure 6 This is a schematic diagram of the distribution head in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the air distribution plate in an embodiment of this utility model; Figure 8 This is an exploded view of the journal in an embodiment of this utility model; Figure 9 for Figure 2 Enlarged view of point A.

[0028] In the diagram: 100-Filter press assembly; 200-Negative pressure assembly; 300-Positive pressure assembly; 1-Slurry tank; 2-Central shaft; 3-Filtrate pipe; 4-Filter fan; 5-Discharge hole; 6-Overflow trough; 7-Distributor head; 8-Friction disc; 9-Air distribution disc; 10-Negative pressure chamber; 11-Positive pressure chamber; 12-Negative pressure hole; 13-Positive pressure hole; 14-Transition chamber; 15-Transition hole; 16-Negative pressure pipe; 17-Positive pressure pipe; 18-Atmospheric pressure pipe; 19-Block; 20-Position sensor; 21-High-pulse solenoid valve; 22-Support base; 23-Junior journal; 24-Air distribution pipe; 25-Rack; 26-Air compressor; 27-Air storage tank; 28-Drainage tank; 29-Negative pressure generator; 30-Vacuum pump. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] like Figures 1-4 As shown, a disc filtration system includes a slurry tank 1, a central shaft 2, multiple filter components, and an air distribution mechanism. The central shaft 2 is rotatably mounted on the slurry tank 1, and multiple filtrate pipes 3 are arranged circumferentially around the central shaft 2. The multiple filter components are arranged axially along the central shaft 2, and each filter component includes multiple filter fans 4 arranged circumferentially along the central shaft 2 and connected to the corresponding filtrate pipes 3. The filter fans 4 are covered with filter cloth, and the filter fans 4 rotate with the central shaft 2 via the filtrate pipes 3. Along the rotation path of the filter components, there are... The system includes an unloading station and an adsorption station; the gas distribution mechanism is fitted to the end of the central shaft 2 and connected to the filtrate pipe 3; it also includes a negative pressure component 200 and a positive pressure component 300, which are respectively fitted to the gas distribution mechanism; when any filter fan 4 is located in the adsorption station, the gas distribution mechanism uses the negative pressure component 200 to draw air into the filter fan 4 through the filtrate pipe 3 to form a negative pressure; when the filter fan 4 is located in the unloading station, the positive pressure component 300 introduces a positive pressure airflow into the filter fan 4 and maintains the negative pressure state of other filter fans 4.

[0031] The slurry tank 1, central shaft 2, multiple filter components, and air distribution mechanism constitute a basic filter press assembly 100. In this embodiment, the slurry tank 1 is filled with the slurry to be beneficiated, and the central shaft 2 drives the filter components to rotate. During the filtration process, the air distribution mechanism generates negative pressure on the filter fan 4, causing water to enter the filter fan 4 and be discharged from the filtrate pipe 3. The slag is adsorbed on the filter fan 4, and further adsorbed on the surface of the filter cloth. Thus, when the filter cloth expands and vibrates, the filter cake formed on the surface of the filter cloth can be broken, thereby achieving mineral beneficiation.

[0032] One side of the slurry tank 1 is configured as an unloading station, and multiple discharge holes 5 are spaced apart at the unloading station. A movement area for the filter assembly is formed between any two adjacent discharge holes 5. Specifically, to better achieve the collection of the crushed filter cake, the movement area is located above the unloading station. The area above and below the liquid surface in the slurry tank 1 is the adsorption station. When the filter fan 4 is located at the adsorption station, it is immersed in the slurry, thus allowing the slag to be adsorbed onto the surface of the filter fan 4. When the filter fan 4 continues to rotate to the unloading station, a positive pressure is applied within the filter fan 4, causing the filter cloth to expand and vibrate, thereby breaking the filter cake. The broken filter cake then falls from the discharge holes 5 through free fall. A conveyor belt is installed at the outlet end of the discharge holes 5, allowing the broken filter cake to fall onto the conveyor belt and be transported out for collection.

[0033] In this embodiment, an overflow trough 6 is also included. The overflow trough 6 is connected to the slurry tank 1 and is used to discharge excess slurry from the slurry tank 1. The connection between the overflow trough 6 and the slurry tank 1 is located above the tank wall of the slurry tank 1. To save space, the overflow trough 6 is located on the opposite side of the discharge hole 5.

[0034] In some embodiments, the central shaft 2 is provided with an air distribution mechanism at only one end. However, in this embodiment, the central shaft 2 is relatively long and has a large number of filter components. Therefore, in order to ensure that all filter fans 4 can have good negative and positive pressure states, air distribution mechanisms are provided at both ends of the central shaft 2 in this embodiment. This avoids insufficient adsorption and material breaking capacity of the far-end filter fans 4.

[0035] like Figures 2-8As shown, in this embodiment, the gas distribution mechanism includes a fixedly installed distribution head 7, a friction disc 8, and a gas-distribution disc 9. The distribution head 7 is located at the end of the central shaft 2 and is rotatably connected to the central shaft 2. The distribution head 7 is divided into negative pressure chambers 10 and positive pressure chambers 11. The negative pressure chamber 10 corresponds to the adsorption station, and the positive pressure chamber 11 corresponds to the ore unloading station. The friction disc 8 is provided with multiple air holes that are respectively connected to each filtrate pipe 3. The friction disc 8 rotates with the central shaft 2. The gas-distribution disc 9 is connected to the distribution head 7. The end face of the gas-distribution disc 9 and the end face of the friction disc 8 are slidably engaged. The gas-distribution disc 9 is provided with negative pressure holes 12 and positive pressure holes 13. The negative pressure holes 12 correspond to the negative pressure chamber 10, and the positive pressure holes 13 correspond to the positive pressure chamber 11. The distribution head 7 is connected to each filtrate pipe 3 through the gas-distribution disc 9. The negative pressure component 200 is connected to the negative pressure chamber 10, and the positive pressure component 300 is connected to the positive pressure chamber 11.

[0036] In this embodiment, the dispensing head 7 and the air-dispensing disc 9 form a fixed part, while the friction disc 8 rotates with the central shaft 2 and is a rotating part. The negative pressure hole 12 and positive pressure hole 13 of the air-dispensing disc 9 connect to different air holes on the friction disc 8 at different times, thereby achieving connection to different filtrate tubes 3 at different times. Furthermore, the negative pressure hole 12 includes a plurality of continuously spaced curved waist-shaped holes, and the positive pressure hole 13 is a hole that is different from the curved waist-shaped holes. In order to ensure the stability of gas flow, the negative pressure chamber 10 has a structure corresponding to the negative pressure hole 12, and the positive pressure chamber 11 has a structure corresponding to the positive pressure hole 13. In this embodiment, the positive pressure chamber 11 is an independent area in the negative pressure chamber 10. Specifically, on the axial projection plane of the distribution head 7, the projection of the negative pressure chamber 10 includes the projection of the positive pressure chamber 11, and the thickness of the negative pressure chamber 10 in the axial direction is greater than that of the positive pressure chamber 11. That is, at the distribution head 7, negative pressure is generated under normal conditions, and there is no negative pressure in the positive pressure chamber 11. The positive pressure chamber 11 can generate positive pressure alone to impact the filter cloth. When the positive pressure chamber 11 is introduced into the positive pressure chamber, negative pressure can still exist in its external space (negative pressure chamber 10). That is, when a positive pressure chamber 11 is generated for a certain filter fan 4, it does not affect the negative pressure state of other filter fans 4.

[0037] It is known that the filter fan 4 has negative pressure at the adsorption station and positive pressure at the unloading station. The transition from negative pressure to positive pressure will cause a severe impact on the system in order to ensure the actual effect, which may lead to serious safety risks such as equipment damage, seal failure, or even explosion. Therefore, in this embodiment, in order to better realize the expansion and vibration of the filter cloth under the premise of safety and efficiency, a transition station is also provided on the rotation path of the filter assembly. The filter fan 4 enters the unloading station from the adsorption station through the transition station. The distribution head 7 is also divided into transition chambers 14, which correspond to the transition stations and are connected to the outside air. The air distribution plate 9 is provided with transition holes 15, which correspond to the transition chambers 14. In the rotation path of the filter assembly, the transition hole 15 is located between the positive pressure hole 13 and the negative pressure hole 12. The transition hole 15 is a small hole, and the opening of the transition chamber 14 is a curved waist-shaped hole with a certain length. The size of the opening of the transition chamber 14 is larger than the size of the transition hole 15, so that the transition hole 15 moves along the opening of the transition chamber 14. Therefore, when the filtrate pipe 3 corresponding to a certain filter fan 4 is connected to the transition hole 15, the pressure can be gradually released in a gradient manner through the transition chamber 14. That is, during the movement from the beginning to the end of the transition chamber 14, the negative pressure is converted to normal pressure. Then, the filtrate pipe 3 is connected to the positive pressure hole 13 and the pressure is converted from normal pressure to positive pressure, thereby better realizing the ore unloading operation.

[0038] Similar to the configuration principle of the positive pressure chamber 11, the transition chamber 14 is an independent area in the negative pressure chamber 10, which will not be described in detail here.

[0039] In this embodiment, the distribution head 7 is provided with a negative pressure pipe 16, a positive pressure pipe 17, and a normal pressure pipe 18. The negative pressure pipe 16 is connected to the negative pressure chamber 10, the positive pressure pipe 17 is connected to the positive pressure chamber 11, and the normal pressure pipe 18 is connected to the transition chamber 14.

[0040] like Figure 9 As shown, in this embodiment, a baffle 19 corresponding to the filter fan 4 or the filtrate pipe 3, and a position sensor 20 are also included. The position sensor 20 and the baffle 19 cooperate to drive the positive pressure assembly 300 to introduce positive pressure airflow into the filter fan 4 located at the ore unloading position. When the filter fan 4 that needs to unload ore is connected to the positive pressure chamber 11, the position sensor 20 senses the baffle 19 and sends a control signal to control the high-pulse solenoid valve 21 to instantly blow high-pressure gas into the positive pressure chamber 11 of the distribution head 7, thereby quickly agitating the filter cloth and causing the filter cake to fall off.

[0041] like Figure 2 , Figure 3 , Figure 5As shown, in this embodiment, it also includes a support base 22, a journal 23, and a drive mechanism. The support base 22 is set on the mounting platform of the slurry tank 1, and the distribution head 7 is connected to the support base 22. The journal 23 is connected to the end of the central shaft 2, and the journal 23 and the support base 22 are rotatably engaged. One end of the journal 23 is provided with a plurality of air distribution pipes 24 corresponding to and communicating with the filter pipe 3. The other end of the journal 23 is connected to the side of the friction disk 8 away from the air distribution disk 9, and the air distribution pipes 24 correspond one-to-one with the air holes of the air distribution disk 8. The drive mechanism is driven by the journal 23. Specifically, the outer circumference of the journal 23 is provided with an annular rack 25. The drive mechanism includes a motor and a transmission gear set on the output shaft of the motor. The transmission gear meshes with the annular rack 25, thereby satisfying the rotation requirements of the central shaft 2. In some other embodiments, the rotation of the central shaft 2 can also be achieved by directly driving the journal 23 to rotate by the motor. In this embodiment, the journal 23 is evenly arranged with blocks 19 corresponding to the filter fan 4, and the position sensor 20 is mounted on the support base 22.

[0042] like Figure 1 As shown, in this embodiment, the positive pressure assembly 300 includes an air compressor 26 and an air storage tank 27. The compressed gas generated by the air compressor 26 is stored in the air storage tank 27. The air storage tank 27 is connected to the positive pressure chamber 11 through a positive pressure air pipe. The positive pressure air pipe is equipped with a high-pulse solenoid valve 21. Therefore, in this embodiment, the path of the positive pressure airflow is generated by the control of the high-pulse solenoid valve 21, thereby providing the filter cloth with instantaneous, high-pressure airflow impact.

[0043] like Figure 1 As shown, the negative pressure assembly 200 includes a drain tank 28 and a negative pressure generating tank 29; the negative pressure generating tank 29 is connected to the negative pressure chamber 10 and the drain tank 28. Specifically, the negative pressure generating tank 29 is equipped with a vacuum pump 30, which generates negative pressure to attract the slurry in the slurry tank 1. Water enters the negative pressure generating tank 29 through the filter pipe 3, and then the water is discharged through the drain tank 28.

[0044] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A disc filter system, characterized in that include: Slurry tank; A central shaft is rotatably mounted in a slurry tank, and multiple filter pipes are arranged circumferentially on the central shaft. Multiple filter components are arranged axially along a central axis. Each filter component includes multiple filter fans arranged circumferentially along the central axis and connected to the corresponding filtrate pipes. The filter fans are covered with filter cloth and rotate with the central axis via the filtrate pipes. An unloading station and an adsorption station are provided along the rotation path of the filter components. A gas distribution mechanism, wherein the end of the gas distribution mechanism is engaged with the central shaft and connected to the filter pipe; Negative pressure component and positive pressure component, wherein the negative pressure component and positive pressure component are respectively coordinated with the gas distribution mechanism; The gas distribution mechanism draws air from any filter fan at the adsorption station to create negative pressure, and when the filter fan is at the unloading station, it introduces positive pressure airflow into the filter fan while maintaining negative pressure on other filter fans.

2. A disc filter system as claimed in claim 1, characterized in that The gas distribution mechanism includes: A fixed distribution head is located at the end of the central shaft and is rotatably connected to the central shaft. The distribution head is divided into a negative pressure chamber and a positive pressure chamber. The negative pressure chamber corresponds to the adsorption station, and the positive pressure chamber corresponds to the ore unloading station. A friction disc, wherein the friction disc is provided with multiple air holes respectively communicating with each filtrate tube, and the friction disc rotates with a central axis; and The gas distribution plate is connected to the distribution head. The end face of the gas distribution plate and the end face of the friction plate are slidably engaged. The gas distribution plate is provided with negative pressure holes and positive pressure holes. The negative pressure holes correspond to the negative pressure chamber, and the positive pressure holes correspond to the positive pressure chamber. The distribution head is connected to each filtrate tube through the gas distribution plate. The negative pressure component is connected to the negative pressure chamber, and the positive pressure component is connected to the positive pressure chamber.

3. A disc filter system as claimed in claim 2, characterized in that Also includes: Baffles are provided corresponding to the filter sector or filtrate tube; as well as A position sensor, in conjunction with a stop block, drives a positive pressure assembly to introduce positive pressure airflow into the filter fan located at the ore unloading station.

4. A disc filter system as claimed in claim 2, characterized in that A transition station is also provided on the rotation path of the filter assembly, through which the filter fan enters the unloading station from the adsorption station. The distribution head is also divided into transition chambers, which correspond to transition workstations and are connected to the outside air. The air distribution plate is provided with a transition hole, which corresponds to the transition chamber. The opening size of the transition chamber is larger than the hole size of the transition hole.

5. A disc filter system as claimed in claim 4, characterised in that The positive pressure chamber and the transition chamber are independent areas within the negative pressure chamber.

6. A disc filter system as claimed in claim 2, characterised in that Also includes: A support base is provided on the mounting platform of the slurry tank, and the dispensing head is connected to the support base; A journal, the end of which is connected to the central shaft, and the journal and support seat are rotatably fitted. One end of the journal is provided with multiple gas distribution pipes corresponding to and communicating with the filtrate pipes. The other end of the journal is connected to the side of the friction disc away from the gas distribution plate, and the gas distribution pipes correspond one-to-one with the air holes of the gas distribution plate; and A drive mechanism, which is connected to the journal drive.

7. A disc filter system as claimed in claim 2, characterised in that The negative pressure component includes: Drainage tank; and A negative pressure generating tank, which is connected to a negative pressure chamber and a drain tank.

8. A disc filter system as claimed in claim 1, characterized in that One side of the slurry tank is configured as an unloading station, and multiple discharge holes are spaced apart at the unloading station. The movement area of ​​the filter assembly is formed between any two adjacent discharge holes.

9. A disc filter system as claimed in claim 1, characterized in that Also includes: An overflow tank, which is connected to a slurry tank, is used to discharge excess slurry from the slurry tank.

10. A disc filtration system as described in claim 1, characterized in that, Gas distribution mechanisms are provided at both ends of the central shaft.

Images