Dehydration system

Abstract

The utility model provides a kind of dehydration system.The dehydration system includes filter unit (1) and recovery unit (2), filter unit (1) includes primary filter unit (11) and secondary filter unit (12), primary filter unit (11) is connected with secondary filter unit (12), recovery unit (2) includes separation equipment (21), separation equipment (21) one end is connected with secondary filter unit (12), and other end is connected with primary filter unit (11), separation equipment (21) can filter out secondary filtrate (123) in secondary filter unit (12) after separation bottom flow liquid (212) is recovered to primary filter unit (11) and is filtered again.The dehydration system provided by the utility model can solve the problem that the existing dehydration system directly discharges the percolate to the salt field, reduces the production of carnallite solid, and causes resource waste.

Description

Technical Field

[0001] This utility model relates to the field of dehydration technology in chemical production, and more specifically, to a dehydration system. Background Technology

[0002] In the chemical production field, especially in the potash fertilizer manufacturing industry, solid-liquid separation of low-sodium carnallite is a crucial step determining product quality and production efficiency. As an important intermediate in potassium chloride production, the dehydration process of low-sodium carnallite directly affects the extraction rate of potassium chloride and the purity of the final product. Traditional dehydration systems often employ a single centrifugal dehydration technique, directly feeding the high-solids-content carnallite slurry into a centrifuge for high-speed separation. The aim is to quickly remove free mother liquor from the slurry through centrifugal force, obtaining a dry carnallite solid phase.

[0003] However, when traditional dewatering systems use a single centrifugal dewatering technique to treat low-sodium carnallite slurry containing a large amount of saturated MgCl2 mother liquor, the severe cross-filtration phenomenon means that tiny particles and effective components in the solid phase are easily separated out along with the liquid phase, resulting in an abnormally high solid content in the cross-filtrate after dewatering, generally reaching 20%-30%. This not only means that a large amount of precious carnallite resources are not fully utilized, causing direct economic losses, but also that the cross-filtrate is directly discharged into the salt field, causing the fine carnallite particles that could have been recycled to be diluted or even lost in the salt field environment, further aggravating the waste of resources. Utility Model Content

[0004] The main purpose of this invention is to provide a dehydration system that can solve the problem that existing dehydration systems directly discharge the filtrate into the salt field, reducing the yield of carnallite solids and causing resource waste.

[0005] To achieve the above objectives, according to one aspect of the present invention, a dehydration system is provided, including a filtration unit and a recovery unit. The filtration unit includes a primary filtration unit and a secondary filtration unit, which are connected together. The recovery unit includes a separation device, one end of which is connected to the secondary filtration unit and the other end of which is connected to the primary filtration unit. The separation device is capable of recovering the underflow liquid after separation of the secondary filtrate filtered out in the secondary filtration unit to the primary filtration unit for further filtration.

[0006] Furthermore, the separation equipment can separate the secondary filtrate into an overflow liquid, which is then discharged from the dehydration system.

[0007] Furthermore, the primary filtration unit includes a belt filter and a washing assembly. The washing assembly can wash the material on the belt filter. The belt filter filters the washed material to form a primary filter cake and a primary filtrate. The primary filtrate is discharged from the dewatering system, and the primary filter cake is conveyed to the secondary filtration unit.

[0008] Furthermore, the flushing assembly includes a flushing water pump and a flushing nozzle, wherein the flushing water pump is capable of pumping flushing liquid to the belt filter through the flushing nozzle.

[0009] Furthermore, the secondary filtration unit includes a centrifuge and a secondary filtrate collection tank. The centrifuge can filter the primary filter cake to form secondary filtrate. The secondary filtrate collection tank is connected to the centrifuge and the separation equipment. The secondary filtrate collection tank can collect the secondary filtrate and transport it to the separation equipment.

[0010] Furthermore, the recovery unit also includes a mother liquor tank and a mother liquor pump. The mother liquor tank can hold the overflow liquid and the primary filtrate, and the mother liquor pump is installed inside the mother liquor tank. The mother liquor pump can discharge the mixed mother liquor containing the overflow liquid and the primary filtrate from the mother liquor tank into the dehydration system.

[0011] Furthermore, a conveying device is provided between the primary filtration unit and the secondary filtration unit, which can transport the primary filter cake to the secondary filtration unit.

[0012] Furthermore, the dehydration system also includes a monitoring unit, which includes sensors and a central controller. The secondary filtration unit includes a centrifuge. The sensors can monitor the operating status of the belt filter and the centrifuge, and the central controller can control the belt filter and the centrifuge based on the monitoring data from the sensors.

[0013] Furthermore, the sensors include a material layer thickness sensor, which can monitor the material thickness on the belt filter and acquire material thickness data. The central controller can control the belt speed of the belt filter based on the material thickness data.

[0014] Furthermore, the sensor also includes a moisture content sensor, which can monitor the moisture content of the material inside the centrifuge and acquire moisture content data. The central controller can control the speed of the centrifuge based on the moisture content data.

[0015] Applying the technical solution of this utility model, the dewatering system first performs coarse filtration on the material through a primary filtration unit to quickly separate most of the free mother liquor, retaining coarse carnallite solid particles to form a primary filter cake, thereby reducing the load on the subsequent secondary filtration unit. The primary filter cake after dewatering still contains a certain amount of moisture, which is then finely filtered through a secondary filtration unit to obtain low-sodium carnallite solid suitable for cold crystallization, ensuring that the final product's moisture content meets the requirements for cold crystallization and improving the quality and yield of potassium products. To recover the fine carnallite particles in the secondary filtrate discharged from the secondary filtration unit and avoid direct loss, a separation device is installed. This device separates the secondary filtrate from the secondary filtration unit to obtain underflow, which is rich in fine carnallite particles. Under the separation action of the device, the fine carnallite particles accumulate at the bottom of the separation device. This portion of fine crystals can be directly returned to the feed inlet of the primary filtration unit to undergo preliminary dewatering treatment together with the original low-sodium carnallite slurry, achieving full recovery of fine crystals, greatly reducing potassium mineral loss, improving the overall potassium recovery rate, and reducing resource waste. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 A schematic diagram of the overall structure of the dehydration system of this utility model is shown.

[0018] The above figures include the following reference numerals:

[0019] 1. Filtration unit; 11. Primary filtration unit; 112. Washing assembly; 113. Primary filter cake; 114. Primary filtrate; 115. Filter cloth; 116. Washing water pump; 117. Washing nozzle; 12. Secondary filtration unit; 122. Secondary filtrate collection tank; 123. Secondary filtrate; 13. Conveying device; 2. Recovery unit; 21. Separation equipment; 211. Overflow liquid; 212. Underflow liquid; 22. Mother liquor tank; 23. Mother liquor pump; 24. Feed pump; 3. Monitoring unit; 31. Sensor; 311. Material layer thickness sensor; 312. Moisture content sensor; 32. Central controller; 4. Material to be filtered; 5. Crystallizer; 6. Salt field system. Detailed Implementation

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] See also Figure 1As shown, this utility model provides a dehydration system, which includes a filtration unit 1 and a recovery unit 2. The filtration unit 1 includes a primary filtration unit 11 and a secondary filtration unit 12, which are connected to each other. The recovery unit 2 includes a separation device 21, one end of which is connected to the secondary filtration unit 12 and the other end of which is connected to the primary filtration unit 11. The separation device 21 can recover the underflow liquid 212 after the separation of the secondary filtrate 123 filtered out in the secondary filtration unit 12 to the primary filtration unit 11 for further filtration.

[0022] In the above technical solution, the dehydration system first performs coarse filtration on the material to be filtered 4 through a primary filtration unit 11 to quickly separate most of the free mother liquor, retaining coarse carnallite solid particles to form a primary filter cake 113, thereby reducing the load on the subsequent secondary filtration unit 12. The primary filter cake 113, after dehydration by the primary filtration unit 11, still contains a certain amount of moisture. It then undergoes fine filtration through the secondary filtration unit 12 to obtain low-sodium carnallite solid suitable for cold crystallization, ensuring that the final product's moisture content meets the requirements for cold crystallization and improving the quality and yield of potassium products. To recover fine carnallite particles from the secondary filtrate 123 discharged from the secondary filtration unit 12 and avoid direct loss, a separation device 21 is installed. The secondary filtrate 123 filtered from the secondary filtration unit 12 is separated to obtain underflow 212. Underflow 212 is rich in fine carnallite particles. Under the separation action of the separation device 21, the fine carnallite particles are enriched at the bottom of the separation device 21. This part of fine crystals can be directly returned to the feed inlet of the primary filtration unit 11 and undergo preliminary dewatering treatment together with the original low-sodium carnallite slurry. This achieves full recovery of fine crystals, greatly reduces the loss of potassium minerals, improves the overall potassium recovery rate, and reduces resource waste.

[0023] In one embodiment of the present invention, the separation device 21 can separate the secondary filtrate 123 into an overflow liquid 211, which is discharged from the dehydration system.

[0024] In the above technical solution, the overflow liquid 211 is the clear liquid after separation by separation equipment 21 such as a hydrocyclone. The clear liquid has extremely low potassium content and mainly contains free magnesium chloride solution. Directly discharging it from the dehydration system reduces the complexity of subsequent treatment, simplifies the process, and reduces the impact on the environment.

[0025] In one embodiment of the present invention, the primary filtration unit 11 includes a belt filter and a rinsing assembly 112. The rinsing assembly 112 can rinse the material on the belt filter. The belt filter filters the rinsed material to form a primary filter cake 113 and a primary filtrate 114. The primary filtrate 114 is discharged from the dewatering system, and the primary filter cake 113 is transported to the secondary filtration unit 12.

[0026] In the above technical solution, the belt filter, as a primary dewatering device, rapidly separates most of the free mother liquor from the slurry, forming a primary filter cake 113. Through principles such as vacuum suction, it effectively traps coarse carnallite solid particles, forming a primary filter cake with a high water content, while simultaneously allowing the primary filtrate 114 to be separated and discharged from the system, reducing the processing difficulty of subsequent equipment. The rinsing assembly 112 continuously rinses the filter cloth 115 of the belt filter to prevent pore blockage and maintain filtration efficiency. Through the rinsing action of high-pressure water, residual solids on the surface of the filter cloth can be effectively cleaned, ensuring the water permeability and filtration performance of the filter cloth, thereby maintaining the belt filter's continuous high processing capacity and improving the overall efficiency and economy of the dewatering system.

[0027] In one embodiment of the present invention, the rinsing assembly 112 includes a rinsing water pump 116 and a rinsing nozzle 117, wherein the rinsing water pump 116 is capable of pumping rinsing liquid to the belt filter through the rinsing nozzle 117.

[0028] In the above technical solution, the flushing water pump 116 provides sufficient pressure and flow to deliver the flushing liquid to the flushing nozzle 117. The flushing nozzle 117, located above the belt filter, can evenly spray the flushing liquid, ensuring that all areas of the filter cloth 115 are thoroughly cleaned. This uniform spraying method helps prevent partial wear or clogging of the filter cloth, extends its service life, and reduces downtime and costs associated with filter cloth replacement. The arrangement of the flushing assembly 112, especially the coordinated use of the flushing water pump 116 and the flushing nozzle 117, enables high-pressure flushing water to effectively penetrate and remove solid residues from the filter cloth 115, ensuring the cleanliness and permeability of the filter cloth, allowing the belt filter to maintain a high filtration rate and separation effect even after long-term continuous operation.

[0029] In one embodiment of the present invention, the secondary filtration unit 12 includes a centrifuge 121 and a secondary filtrate collection tank 122. The centrifuge 121 can filter the primary filter cake 113 to form a secondary filtrate 123. The secondary filtrate collection tank 122 is connected to the centrifuge 121 and the separation device 21. The secondary filtrate collection tank 122 can collect the secondary filtrate 123 and transport the secondary filtrate 123 to the separation device 21.

[0030] In the above technical solution, centrifuge 121 serves as a deep dehydration device. Through centrifugal force generated by its high-speed rotation, centrifuge 121 further separates the moisture from the primary filter cake 113, improving the dryness of the material and forming a dehydrated low-sodium carnallite solid that meets the requirements for cold crystallization. This solid is then discharged into crystallizer 5 for further crystallization, thereby reducing energy consumption in the crystallization process and improving the quality of the potassium product. Secondary filtrate collection tank 122 serves as a buffer and collection container. It receives the secondary filtrate 123 separated by centrifuge 121, and its function is to collect and temporarily store this filtrate for subsequent processing. The secondary filtrate collection tank 122 is connected to separation equipment 21 via pipeline, allowing the secondary filtrate to be separated within the separation equipment 21 and the liquid rich in fine carnallite particles to be recovered, reducing resource loss and increasing the overall potassium recovery rate. The centrifuge 121 and the secondary filtrate collection tank 122 in the secondary filtration unit 12 meet the process requirements of deep dehydration and realize the efficient recovery of fine particles in the secondary filtrate. This has a significant promoting effect on improving resource utilization and product quality in the potash fertilizer production process.

[0031] In one embodiment of the present invention, the recovery unit 2 further includes a mother liquor tank 22 and a mother liquor pump 23. The mother liquor tank 22 can contain overflow liquid 211 and primary filtrate 114. The mother liquor pump 23 is installed in the mother liquor tank 22 and can discharge the mixed mother liquor containing overflow liquid 211 and primary filtrate 114 from the mother liquor tank 22 into the dehydration system.

[0032] In the above technical solution, the mother liquor tank 22 is used to receive and mix the overflow liquid 211 separated from the hydrocyclone and the primary filtrate 114 produced by the belt filter. Its function is to provide a unified collection and storage point for facilitating subsequent processing of these filtrates. The mother liquor pump 23, installed within the mother liquor tank 22, is used to pump the mixed mother liquor out of the tank and transport it to a designated processing or storage location, such as the salt field system 6. The mixed mother liquor in the mother liquor tank has become saturated brine with extremely low solid content. Transporting the mixed mother liquor to the salt field system 6 for subsequent processing such as sun-drying achieves resource recycling.

[0033] In one embodiment of this utility model, the recovery unit 2 further includes a feed pump 24, which serves as a liquid conveying device. The feed pump 24 can pump the secondary filtrate in the secondary filtrate collection tank 122 to the separation device 21, ensuring the continuity and efficiency of the fine crystal recovery process.

[0034] In one embodiment of the present invention, a conveying device 13 is provided between the primary filtration unit 11 and the secondary filtration unit 12, and the conveying device 13 can convey the primary filter cake 113 to the secondary filtration unit 12.

[0035] In the above technical solution, the conveying device 13 typically includes a screw conveyor or scraper conveyor, acting as a bridge between the initial dewatering and deep dewatering processes. The main function of the conveying device 13 is to receive the primary filter cake 113 from the belt filter and smoothly deliver it to the centrifuge 121. By using the conveying device 13, the system achieves a seamless link from primary to secondary dewatering, resulting in smoother material transport and reduced material loss and processing time. Simultaneously, pretreatment improves the dewatering effect, makes the centrifuge 121 more stable, extends the equipment's service life, and reduces maintenance costs.

[0036] In one embodiment of this utility model, a twin-shaft stirring screw conveyor is used as the conveying device 13.

[0037] In the above technical solution, the stirred screw conveyor has the ability to continuously transport materials, stably transferring the primary filter cake from the belt filter to the centrifuge, ensuring the continuity and efficiency of the entire cascade dewatering system. Furthermore, although most of the free mother liquor has been removed from the primary filter cake 113 after primary dewatering, it may still exhibit some degree of agglomeration or adhesion due to the presence of carnallite solids with high water content. The twin-shaft stirred screw conveyor has adjustable-angle stirring rods on its spiral blades, which can break up and homogenize the potentially agglomerated primary filter cake from the belt filter during the conveying process, allowing it to enter the centrifuge in a loose and uniform state, greatly improving the centrifuge's dewatering effect and operational stability.

[0038] In one embodiment of the present invention, the dehydration system further includes a monitoring unit 3, which includes a sensor 31 and a central controller 32. The secondary filtration unit 12 includes a centrifuge 121. The sensor 31 can monitor the working status of the belt filter and the centrifuge 121, and the central controller 32 can control the belt filter and the centrifuge 121 according to the monitoring data of the sensor 31.

[0039] In the above technical solution, during the potash fertilizer production process, the properties of the material (such as moisture content and particle size distribution) and the operating parameters of the equipment (such as rotation speed and pressure) can affect dewatering efficiency and product quality. By monitoring these key parameters in real time through the monitoring unit 3, problems can be detected promptly, and adjustments can be made to avoid production anomalies and improve the stability and reliability of the system. Sensors 31 typically include material layer thickness sensors and online moisture sensors, used to monitor the working status of the equipment and material parameters in real time, providing a basis for the central controller to make decisions. The central controller 32 is responsible for receiving and analyzing sensor data, automatically adjusting the operating parameters of the belt filter and centrifuge, and realizing intelligent control of the system. Real-time monitoring and intelligent adjustment of equipment parameters can maximize the dewatering capacity of the belt filter and centrifuge, ensuring that the final dewatered product meets the requirements of the cold crystallization process, and guaranteeing the quality and stability of the potash fertilizer product.

[0040] In one embodiment of this utility model, the sensor 31 includes a material layer thickness sensor 311, which can monitor the material thickness on the belt filter and acquire material thickness data. The central controller 32 can control the belt speed of the belt filter according to the material thickness data.

[0041] In the above technical solution, the material layer thickness sensor 311 monitors the material thickness on the filter cloth in real time, acquiring accurate material thickness data through non-contact or contact measurement technologies, such as ultrasonic, laser, and pressure sensors. Based on the monitoring data of the material layer thickness sensor 311, the central controller 32 can adjust the belt speed of the belt filter in a timely manner. When the material layer thickness is detected to exceed the predetermined range, the controller will slow down the belt speed to give the material more sufficient dewatering time; conversely, it will speed up the belt speed to maintain a balance between throughput and dewatering efficiency. This dynamic adjustment mechanism ensures the consistency of material processing, improves the dewatering effect, helps to obtain a more consistent dewatered product, and avoids product quality fluctuations caused by uneven material thickness.

[0042] In one embodiment of the present invention, the sensor 31 further includes a moisture content sensor 312, which can monitor the moisture content of the material discharged from the centrifuge 121 and acquire moisture content data. The central controller 32 can control the rotation speed of the centrifuge 121 according to the moisture content data.

[0043] In the above technical solution, a moisture content sensor 312 is installed at the solid phase outlet of the centrifuge 121, enabling it to quickly and accurately measure the moisture content in the solid material discharged from the centrifuge 121. It can be a non-contact sensor based on microwave, infrared, or other electromagnetic radiation principles, or a contact sensor, such as a capacitive sensor; the specific choice depends on the material characteristics and environmental conditions. The moisture content data monitored by the sensor 312 is transmitted to the central controller 32, which intelligently adjusts the speed of the centrifuge 121 based on this information. When the moisture content is too high, the controller instructs the centrifuge to increase its speed to enhance dehydration; conversely, it reduces the speed to decrease energy consumption and prevent over-dehydration of the material. This dynamic adjustment strategy ensures precise control of the product's moisture content while significantly reducing the overall energy consumption of the system.

[0044] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: The dehydration system first performs coarse filtration on the material through a primary filtration unit 11 to quickly separate most of the free mother liquor, retaining coarse carnallite solid particles to form a primary filter cake 113, thereby reducing the load on the subsequent secondary filtration unit 12. The primary filter cake 113 after filtration and dehydration by the primary filtration unit 11 still contains a certain amount of moisture. It is then finely filtered through the secondary filtration unit 12 to obtain low-sodium carnallite solid suitable for cold crystallization, ensuring that the moisture content of the final product meets the requirements for cold crystallization and improving the quality and yield of potassium products. To recover fine carnallite particles from the secondary filtrate 123 discharged from the secondary filtration unit 12 and avoid direct loss, a separation device 21 is installed. The secondary filtrate 123 filtered from the secondary filtration unit 12 is separated to obtain underflow 212. Underflow 212 is rich in fine carnallite particles. Under the separation action of the separation device 21, the fine carnallite particles are enriched at the bottom of the separation device 21. This part of fine crystals can be directly returned to the feed inlet of the primary filtration unit 11 and undergo preliminary dewatering treatment together with the original low-sodium carnallite slurry. This achieves full recovery of fine crystals, greatly reduces the loss of potassium minerals, improves the overall potassium recovery rate, and reduces resource waste.

[0045] By setting up a primary filtration unit 11 including a belt filter and a secondary filtration unit 12 including a centrifuge 121, a series cascade dewatering system is formed. At the same time, the separation equipment 21 including a hydrocyclone is used to circulate and filter the secondary filtrate 123. This effectively solves the problems of severe filtration and low potassium recovery when the centrifuge 121 operates alone, and realizes the recovery of fine crystals and the resource utilization of mother liquor. It has the advantages of high recovery rate, low energy consumption and stable operation.

[0046] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dehydration system, characterized in that, The system includes a filtration unit (1) and a recovery unit (2). The filtration unit (1) includes a primary filtration unit (11) and a secondary filtration unit (12). The primary filtration unit (11) is connected to the secondary filtration unit (12). The recovery unit (2) includes a separation device (21). One end of the separation device (21) is connected to the secondary filtration unit (12), and the other end is connected to the primary filtration unit (11). The separation device (21) can recover the underflow liquid (212) after the secondary filtrate (123) filtered out in the secondary filtration unit (12) to the primary filtration unit (11) for filtration again.

2. The dehydration system according to claim 1, characterized in that, The separation device (21) is capable of separating the secondary filtrate (123) into an overflow liquid (211), which is discharged from the dehydration system.

3. The dehydration system according to claim 2, characterized in that, The primary filtration unit (11) includes a belt filter and a rinsing assembly (112). The rinsing assembly (112) can rinse the material on the belt filter. The belt filter filters the rinsed material to form a primary filter cake (114) and a primary filtrate (115). The primary filtrate (115) is discharged from the dewatering system, and the primary filter cake (114) is transported to the secondary filtration unit (12).

4. The dehydration system according to claim 3, characterized in that, The flushing assembly (112) includes a flushing water pump (116) and a flushing nozzle (117), wherein the flushing water pump (116) is capable of pumping flushing liquid to the belt filter through the flushing nozzle (117).

5. The dehydration system according to claim 3, characterized in that, The secondary filtration unit (12) includes a centrifuge (121) and a secondary filtrate collection tank (122). The centrifuge (121) can filter the primary filter cake (114) to form the secondary filtrate (123). The secondary filtrate collection tank (122) is connected to the centrifuge (121) and the separation device (21). The secondary filtrate collection tank (122) can collect the secondary filtrate (123) and transport the secondary filtrate (123) to the separation device (21).

6. The dehydration system according to claim 3, characterized in that, The recovery unit (2) further includes a mother liquor tank (22) and a mother liquor pump (23). The mother liquor tank (22) can contain the overflow liquid (211) and the primary filtrate (115). The mother liquor pump (23) is located in the mother liquor tank (22) and can discharge the mixed mother liquor containing the overflow liquid (211) and the primary filtrate (115) from the mother liquor tank (22) into the dehydration system.

7. The dehydration system according to claim 5, characterized in that, A conveying device (13) is also provided between the primary filtration unit (11) and the secondary filtration unit (12), which can convey the primary filter cake (114) to the secondary filtration unit (12).

8. The dehydration system according to claim 6, characterized in that, The dehydration system also includes a monitoring unit (3), which includes a sensor (31) and a central controller (32). The secondary filtration unit (12) includes a centrifuge (121). The sensor (31) can monitor the working status of the belt filter and the centrifuge (121). The central controller (32) can control the belt filter and the centrifuge (121) according to the monitoring data of the sensor (31).

9. The dehydration system according to claim 8, characterized in that, The sensor (31) includes a material layer thickness sensor (311), which can monitor the material thickness on the belt filter and acquire material thickness data. The central controller (32) can control the belt speed of the belt filter according to the material thickness data.

10. The dehydration system according to claim 9, characterized in that, The sensor (31) also includes a moisture content sensor (312), which can monitor the moisture content of the material in the centrifuge (121) and acquire moisture content data. The central controller (32) can control the rotation speed of the centrifuge (121) according to the moisture content data.

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