Intelligent monitoring method and system for solid-liquid separation of pig farm manure

Abstract

This application provides a digital intelligent monitoring method and system for solid-liquid separation of pig farm manure. When the drive motor current exceeds the overload threshold, the opening of the discharge port cone actuator is immediately increased to reduce back pressure, the feed flow rate is simultaneously reduced, and the motor operating frequency is maintained to accelerate discharge until the current falls below the warning threshold. When the drive motor current is below the overload threshold, the discharge port cone resistance is adjusted separately to control the moisture content in a closed loop based on the deviation between the solid discharge moisture content and the target value, combined with the feed solid content as a feedforward signal. Simultaneously, the motor operating frequency is adjusted according to the feed mass flow rate and feed solid content to match the processing capacity with the incoming load. Finally, the product of the feed mass flow rate and feed solid content is integrated over time to obtain the cumulative solids processing capacity. When the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal, an equipment maintenance warning is triggered. The above scheme can realize digital intelligent monitoring of the solid-liquid separation process of manure.

Description

Technical Field

[0001] This application relates to the field of pig farm manure treatment technology, and more specifically, to a digital monitoring method and system for solid-liquid separation of pig farm manure. Background Technology

[0002] Pig farms typically generate large amounts of manure, which, if not properly treated, can lead to environmental pollution, eutrophication of water bodies, and greenhouse gas emissions. Solid-liquid separation, as the core step in manure treatment, can effectively separate solid organic matter from the liquid component, facilitating subsequent resource utilization. For example, the solid phase can be used for composting, while the liquid phase can be used for biogas fermentation or irrigation. This achieves the reduction, harmlessness, and resource recovery of manure, and is crucial for ensuring the sustainable development of pig farms and environmental protection.

[0003] Traditional solid-liquid separation of pig farm manure mainly relies on mechanical equipment such as screw extruders or vibrating screens. The separation effect is controlled by manually adjusting the feed flow rate, discharge resistance, and motor speed. However, these methods often lack real-time monitoring and intelligent control, resulting in large fluctuations in separation efficiency, easy overload or blockage of equipment, and maintenance relying on experience. They cannot adapt to dynamic changes in manure composition (such as fluctuations in solid content), leading to problems such as energy waste, incomplete separation, and shortened equipment life. Therefore, how to achieve digital and intelligent monitoring of the solid-liquid separation process of manure has become an urgent problem to be solved in the industry. Summary of the Invention

[0004] This application provides a digital monitoring method and system for solid-liquid separation of pig farm manure, which can realize digital monitoring of the solid-liquid separation process of manure.

[0005] In a first aspect, this application provides a method for intelligent monitoring of solid-liquid separation in pig farm manure, comprising the following steps: Collect data on feed mass flow rate, feed solid content, drive motor current, solid phase discharge moisture content, and filtrate turbidity during the solid-liquid separation process. The drive motor current is compared with a preset warning threshold and an overload threshold, wherein the warning threshold is lower than the overload threshold; When the current of the drive motor exceeds the overload threshold, the discharge port cone actuator is immediately controlled to increase the opening to reduce the back pressure, the feed flow rate is reduced simultaneously, and the motor operating frequency is kept constant to accelerate the discharge until the current drops below the warning threshold. When the current of the drive motor is below the overload threshold, the discharge cone resistance is adjusted separately to control the moisture content in a closed loop, based on the deviation between the solid output moisture content and the target value, combined with the feed solid content as a feedforward signal; at the same time, the motor operating frequency is adjusted according to the feed mass flow rate and the feed solid content to match the incoming load. The cumulative solids throughput is obtained by integrating the product of the feed mass flow rate and the feed solids content over time. Based on the long-term trend of the pressure difference before and after the screen, combined with the real-time value of the filtrate turbidity and the comparison with the preset threshold, an equipment maintenance warning is triggered when the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal.

[0006] In some embodiments, maintaining the motor operating frequency unchanged when the drive motor current exceeds the overload threshold specifically includes: After detecting a current overload, maintain the current motor frequency unchanged, and immediately increase the opening of the discharge port cone to the maximum safe opening, and close the feed valve to reduce the feed flow rate; The rate of decrease of motor current is monitored in real time. When the current drops below the warning threshold, the cone opening is gradually restored to the normal control range, and the motor frequency is readjusted according to the feed load.

[0007] In some embodiments, the method of individually adjusting the resistance of the discharge cone to control the moisture content in a closed loop specifically includes: Real-time monitoring of the solid discharge moisture content and calculation of its deviation from the target value; The deviation is used as the input to the PID controller, and the target opening adjustment amount of the discharge port cone is output. Simultaneously, the solid content of the feed is detected, and its change is used as a feedforward signal and superimposed on the target opening adjustment amount to obtain the final opening adjustment command. The cone actuator is controlled to change the cone opening according to the final opening adjustment command, thereby adjusting the discharge port resistance and keeping the moisture content within the target range.

[0008] In some embodiments, adjusting the motor operating frequency based on the feed mass flow rate and the feed solid content specifically includes: The product of the feed mass flow rate and the feed solid content is converted into the dry matter inflow rate. Based on the preset unit dry matter processing energy consumption or optimal residence time, the target motor frequency is calculated. By employing closed-loop or open-loop variable frequency control, the actual frequency of the motor follows the target frequency, ensuring a dynamic balance between material conveying and extrusion load within the extrusion chamber.

[0009] In some embodiments, the calculation of the cumulative solids throughput specifically includes: The feed mass flow rate and feed solid content are obtained in real time by using a mass flow meter and an online solid content analyzer installed on the feed pipeline. The product of the feed mass flow rate and the feed solid content is summed over time to obtain the cumulative solids throughput from the start of operation to the current moment.

[0010] In some embodiments, the triggering of the equipment maintenance warning specifically includes: Real-time collection of pressure difference across the screen, calculation of its rate of change or the slope of the fitted trend through a sliding window, and prediction of screen blockage when the slope exceeds the first threshold. Simultaneously monitor the turbidity of the filtrate in real time. When the turbidity exceeds the preset turbidity control upper limit, it is determined that the screen is damaged or the separation efficiency has decreased. The system logically combines two conditions: abnormal differential pressure trend and excessive turbidity. When either condition is met, a maintenance warning is issued and the warning information is pushed to the central control platform.

[0011] In some embodiments, the method further includes a step of performing a fixed-value closed-loop control of the filtrate turbidity: Set the target value for filtrate turbidity, and use the deviation between the measured value and the target value of filtrate turbidity as input to adjust the screen washing cycle or washing intensity, or use the deviation signal to correct the cone resistance setting value so that the filtrate turbidity is maintained within the target range. When the turbidity continues to deviate and adjustment fails, a high-level maintenance warning is triggered.

[0012] Secondly, this application provides a digital intelligent monitoring system for solid-liquid separation of pig farm manure, comprising: The data acquisition module is used to collect data on the feed mass flow rate, feed solid content, drive motor current, solid phase discharge moisture content, and filtrate turbidity during the solid-liquid separation process. The processing module is used to compare the drive motor current with a preset warning threshold and an overload threshold, wherein the warning threshold is lower than the overload threshold; The processing module is also used to immediately control the discharge port cone actuator to increase the opening to reduce back pressure when the current of the drive motor exceeds the overload threshold, simultaneously reduce the feed flow rate, and maintain the motor operating frequency unchanged to accelerate discharge until the current drops below the warning threshold. The processing module is also used to adjust the discharge cone resistance separately to control the moisture content in a closed loop when the current of the drive motor is below the overload threshold, based on the deviation between the solid phase discharge moisture content and the target value, and combined with the feed solid content as a feedforward signal; at the same time, it adjusts the motor operating frequency according to the feed mass flow rate and the feed solid content to make the processing capacity match the incoming load. The execution module is used to perform time integration on the product of the feed mass flow rate and the feed solid content to obtain the cumulative solids processing volume; based on the long-term change trend of the pressure difference before and after the screen and the comparison between the real-time value of the filtrate turbidity and the preset threshold, the equipment maintenance warning is triggered when the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal.

[0013] Thirdly, this application provides a computer device, the computer device including a memory and a processor, the memory storing code, and the processor being configured to acquire the code and execute the above-described intelligent monitoring method for solid-liquid separation of pig farm manure.

[0014] Fourthly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described intelligent monitoring method for solid-liquid separation of pig farm manure.

[0015] The technical solutions provided by the embodiments disclosed in this application have the following beneficial effects: This application, in the process of digital and intelligent monitoring of solid-liquid separation in pig farms, firstly achieves dynamic monitoring and overload protection of motor current by real-time acquisition of multi-source process parameters, avoiding equipment blockage or damage; secondly, it optimizes the discharge cone resistance adjustment by adopting closed-loop control of moisture content combined with feedforward signals of solid content, improving the stability of solid-phase separation quality; thirdly, it achieves adaptive control of the processing capacity by matching the feed load with the motor frequency, reducing energy waste; finally, based on the comprehensive analysis of cumulative solids processing capacity, pressure difference trend, and filtrate turbidity, it realizes predictive early warning of equipment maintenance, thereby enabling digital and intelligent monitoring of the solid-liquid separation process and providing efficient and intelligent management support for pig farm manure treatment. Attached Figure Description

[0016] Figure 1 This is an exemplary flowchart of a method for intelligent monitoring of solid-liquid separation in pig farm manure, as shown in some embodiments of this application. Figure 2 This is an exemplary flowchart illustrating motor current overload protection according to some embodiments of this application; Figure 3 This is a schematic diagram of the structure of a pig farm manure solid-liquid separation intelligent monitoring system according to some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a computer device for implementing a digital monitoring method for solid-liquid separation of pig farm manure according to some embodiments of this application. Detailed Implementation

[0017] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0018] refer to Figure 1 The figure is an exemplary flowchart of a method for intelligent monitoring of solid-liquid separation in pig farm manure according to some embodiments of this application. The method mainly includes the following steps: In step 101, the following data are collected during the solid-liquid separation process: feed mass flow rate, feed solid content, drive motor current, solid phase discharge moisture content, and filtrate turbidity.

[0019] Among them, the feed mass flow rate refers to the mass flow rate of manure entering the solid-liquid separation equipment, which is usually measured in real time by a mass flow meter; the feed solid content refers to the proportion of solid matter in the manure, which can be obtained by an online solid content analyzer (such as a near-infrared or microwave sensor); the drive motor current is the real-time current value of the drive motor of the screw extruder or vibrating screen, which is monitored by a current sensor; the solid phase discharge moisture content refers to the percentage of water content in the separated solid phase material, which can be measured by an infrared moisture meter or by weighing; and the filtrate turbidity refers to the turbidity level of the liquid phase discharge, which is detected in real time by a turbidity sensor.

[0020] In step 102, the drive motor current is compared with a preset warning threshold and an overload threshold, wherein the warning threshold is lower than the overload threshold.

[0021] The warning threshold and overload threshold are preset based on the equipment's rated power and historical operating data. For example, for a 5kW motor, the warning threshold can be set to 120% of the rated current and the overload threshold can be set to 150%. The motor load status is determined by comparison.

[0022] In step 103, when the current of the drive motor exceeds the overload threshold, the discharge port cone actuator is immediately controlled to increase the opening to reduce the back pressure, the feed flow rate is reduced simultaneously, and the motor operating frequency is kept constant to accelerate the discharge until the current drops below the warning threshold.

[0023] In some embodiments, reference Figure 2 As shown, this figure is an exemplary flowchart of motor current overload protection according to some embodiments of this application. The step of maintaining the motor operating frequency unchanged when the drive motor current exceeds the overload threshold specifically includes: In step 1031, after detecting a current overload, the current motor frequency is kept constant, and the opening of the discharge port cone is immediately increased to the maximum safe opening, while the feed valve is closed to reduce the feed flow rate. In step 1032, the rate of decrease of motor current is monitored in real time. When the current falls back below the warning threshold, the cone opening is gradually restored to the normal control range, and the motor frequency is readjusted according to the feed load.

[0024] The discharge cone actuator is usually a pneumatic or electric regulating valve. Increasing the opening can quickly release the pressure in the extrusion chamber and prevent the motor from jamming. Reducing the feed flow rate is achieved by adjusting the pump speed or valve. Maintaining the motor frequency can ensure that the discharge speed does not decrease and accelerate the removal of blockage materials.

[0025] In step 104, when the current of the drive motor is below the overload threshold, the discharge cone resistance is adjusted separately to control the moisture content in a closed loop based on the deviation between the solid discharge moisture content and the target value, combined with the feed solid content as a feedforward signal; at the same time, the motor operating frequency is adjusted according to the feed mass flow rate and the feed solid content to match the processing capacity with the incoming load.

[0026] In some embodiments, the method of individually adjusting the resistance of the discharge cone to control the moisture content in a closed loop specifically includes: Real-time monitoring of the solid discharge moisture content, and calculation of its deviation from the target value, for example, a target moisture content of 65%; The deviation is used as the input to the PID controller, and the target opening adjustment amount of the discharge port cone is output. Simultaneously, the solid content of the feed is detected, and its change is used as a feedforward signal and superimposed on the target opening adjustment amount to obtain the final opening adjustment command. For example, when the solid content increases, the feedforward signal reduces the opening in advance to increase the resistance. The cone actuator is controlled to change the cone opening according to the final opening adjustment command, thereby adjusting the discharge port resistance and keeping the moisture content within the target range.

[0027] In some embodiments, adjusting the motor operating frequency based on the feed mass flow rate and the feed solid content can be achieved in the following ways: The product of the feed mass flow rate and the feed solid content is converted into the dry matter inflow rate. Based on the preset unit dry matter processing energy consumption or optimal residence time, the target motor frequency is calculated. For example, if the optimal residence time is 30 seconds, the frequency is adjusted to match that rate. By employing closed-loop or open-loop variable frequency control, the actual frequency of the motor follows the target frequency, ensuring a dynamic balance between material conveying and extrusion load within the extrusion chamber.

[0028] In step 105, the product of the feed mass flow rate and the feed solid content is integrated over time to obtain the cumulative solids processing capacity; based on the long-term trend of the pressure difference before and after the screen and the real-time value of the filtrate turbidity compared with a preset threshold, an equipment maintenance warning is triggered when the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal.

[0029] In some embodiments, the cumulative solids throughput can be calculated in the following manner: The feed mass flow rate and feed solid content are obtained in real time by using a mass flow meter and an online solid content analyzer installed on the feed pipeline. The product of the feed mass flow rate and the feed solids content is summed over time to obtain the cumulative solids throughput from the start of operation to the current moment, for example, by using numerical integration methods such as the trapezoidal rule.

[0030] In some embodiments, the triggering of the equipment maintenance warning specifically includes: The pressure difference before and after the screen is collected in real time, and its rate of change or the slope of the fitted trend is calculated through a sliding window. When the slope exceeds the first threshold, screen blockage is predicted. For example, the sliding window is 1 hour and the threshold is 0.5 kPa / h. Simultaneously monitor the turbidity of the filtrate in real time. When the turbidity exceeds the preset turbidity control upper limit, it is determined that the screen is damaged or the separation efficiency has decreased. For example, the upper limit is 50 NTU. The system logically combines two conditions: abnormal differential pressure trend and excessive turbidity. When either condition is met, a maintenance warning is issued and the warning information is pushed to the central control platform.

[0031] In some embodiments, the method further includes a step of performing a fixed-value closed-loop control of the filtrate turbidity: Set the target value for filtrate turbidity, and use the deviation between the measured value and the target value of filtrate turbidity as input to adjust the screen washing cycle or washing intensity, or use the deviation signal to correct the cone resistance setting value so that the filtrate turbidity is maintained within the target range. When the turbidity continues to deviate and the adjustment fails, a high-level maintenance warning is triggered, such as an upgraded warning when the continuous deviation exceeds 10 minutes.

[0032] In another aspect, in some embodiments, this application provides an intelligent monitoring system for solid-liquid separation of pig farm manure, as described in the reference. Figure 3 The figure is a schematic diagram of the structure of a pig farm manure solid-liquid separation intelligent monitoring system 300 according to some embodiments of this application. The pig farm manure solid-liquid separation intelligent monitoring system 300 includes: a data acquisition module 301, a processing module 302, and an execution module 303, which are described below: The data acquisition module 301 in this application is mainly used to collect the feed mass flow rate, feed solid content, drive motor current, solid phase discharge moisture content and filtrate turbidity during the solid-liquid separation process. Processing module 302, in this application, is mainly used to compare the drive motor current with a preset warning threshold and an overload threshold, wherein the warning threshold is lower than the overload threshold; The processing module 302 is also used to immediately control the discharge port cone actuator to increase the opening to reduce back pressure when the current of the drive motor exceeds the overload threshold, simultaneously reduce the feed flow rate, and maintain the motor operating frequency unchanged to accelerate discharge until the current drops below the warning threshold. The processing module 302 is also used to adjust the discharge cone resistance separately to control the moisture content in a closed loop when the current of the drive motor is below the overload threshold, based on the deviation between the solid phase discharge moisture content and the target value, and combined with the feed solid content as a feedforward signal; at the same time, it adjusts the motor operating frequency according to the feed mass flow rate and the feed solid content to make the processing capacity match the incoming load. The execution module 303 in this application is mainly used to perform time integration on the product of the feed mass flow rate and the feed solid content to obtain the cumulative solids processing volume; based on the long-term change trend of the pressure difference before and after the screen and the comparison between the real-time value of the filtrate turbidity and the preset threshold, the equipment maintenance warning is triggered when the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal.

[0033] In addition, this application also provides a computer device, which includes a memory and a processor. The memory stores code, and the processor is configured to acquire the code and execute the above-described intelligent monitoring method for solid-liquid separation of pig farm manure.

[0034] In some embodiments, reference Figure 4 This figure is a schematic diagram of the structure of a computer device for implementing an intelligent monitoring method for solid-liquid separation of pig farm manure according to some embodiments of this application. The method in the above embodiments can be achieved through... Figure 4 The computer device shown is used to implement this, and the computer device 400 includes at least one processor 401, a communication bus 402, a memory 403, and at least one communication interface 404.

[0035] The processor 401 may be a general-purpose central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more for controlling the execution of the intelligent monitoring method for solid-liquid separation of pig farm manure in this application.

[0036] The communication bus 402 may include a path for transmitting information between the aforementioned components.

[0037] The memory 403 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CDROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), a magnetic disk or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. The memory 403 may exist independently and be connected to the processor 401 via a communication bus 402. The memory 403 may also be integrated with the processor 401.

[0038] The memory 403 stores program code for executing the scheme of this application, and its execution is controlled by the processor 401. The processor 401 executes the program code stored in the memory 403. The program code may include one or more software modules. In the above embodiment, the intelligent monitoring of solid-liquid separation of pig farm manure can be implemented by the processor 401 and one or more software modules in the program code in the memory 403.

[0039] Communication interface 404 uses any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.

[0040] In a specific implementation, as one example, a computer device may include multiple processors, each of which may be a single-core (single CPU) processor or a multi-core (multi CPU) processor. Here, a processor may refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0041] The aforementioned computer device can be a general-purpose computer device or a special-purpose computer device. In specific implementations, the computer device can be a desktop computer, a portable computer, a network server, a handheld digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, or an embedded device. This application does not limit the type of computer device.

[0042] In addition, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described intelligent monitoring method for solid-liquid separation of pig farm manure.

[0043] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0044] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A method for intelligent monitoring of solid-liquid separation in pig farm manure, characterized in that, Includes the following steps: Collect data on feed mass flow rate, feed solid content, drive motor current, solid phase discharge moisture content, and filtrate turbidity during the solid-liquid separation process. The drive motor current is compared with a preset warning threshold and an overload threshold, wherein the warning threshold is lower than the overload threshold; When the current of the drive motor exceeds the overload threshold, the discharge port cone actuator is immediately controlled to increase the opening to reduce the back pressure, the feed flow rate is reduced simultaneously, and the motor operating frequency is kept constant to accelerate the discharge until the current drops below the warning threshold. When the current of the drive motor is below the overload threshold, the discharge cone resistance is adjusted separately to control the moisture content in a closed loop, based on the deviation between the solid output moisture content and the target value, combined with the feed solid content as a feedforward signal; at the same time, the motor operating frequency is adjusted according to the feed mass flow rate and the feed solid content to match the incoming load. The cumulative solids throughput is obtained by integrating the product of the feed mass flow rate and the feed solids content over time. Based on the long-term trend of the pressure difference before and after the screen, combined with the real-time value of the filtrate turbidity and the comparison with the preset threshold, an equipment maintenance warning is triggered when the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal.

2. The method according to claim 1, characterized in that, The step of maintaining the motor operating frequency unchanged when the drive motor current exceeds the overload threshold specifically includes: After detecting a current overload, maintain the current motor frequency unchanged, and immediately increase the opening of the discharge port cone to the maximum safe opening, and close the feed valve to reduce the feed flow rate; The rate of decrease of motor current is monitored in real time. When the current drops below the warning threshold, the cone opening is gradually restored to the normal control range, and the motor frequency is readjusted according to the feed load.

3. The method according to claim 1, characterized in that, The specific steps of individually adjusting the resistance of the discharge cone to control the moisture content in a closed loop include: Real-time monitoring of the solid discharge moisture content and calculation of its deviation from the target value; The deviation is used as the input to the PID controller, and the target opening adjustment amount of the discharge port cone is output. Simultaneously, the solid content of the feed is detected, and its change is used as a feedforward signal and superimposed on the target opening adjustment amount to obtain the final opening adjustment command. The cone actuator is controlled to change the cone opening according to the final opening adjustment command, thereby adjusting the discharge port resistance and keeping the moisture content within the target range.

4. The method according to claim 1, characterized in that, The adjustment of the motor operating frequency based on the feed mass flow rate and the feed solid content specifically includes: The product of the feed mass flow rate and the feed solid content is converted into the dry matter inflow rate. Based on the preset unit dry matter processing energy consumption or optimal residence time, the target motor frequency is calculated. By employing closed-loop or open-loop variable frequency control, the actual frequency of the motor follows the target frequency, ensuring a dynamic balance between material conveying and extrusion load within the extrusion chamber.

5. The method according to claim 1, characterized in that, The calculation of the cumulative solids throughput specifically includes: The feed mass flow rate and feed solid content are obtained in real time by using a mass flow meter and an online solid content analyzer installed on the feed pipeline. The product of the feed mass flow rate and the feed solid content is summed over time to obtain the cumulative solids throughput from the start of operation to the current moment.

6. The method according to claim 1, characterized in that, The triggering of device maintenance early warning specifically includes: Real-time collection of pressure difference across the screen, calculation of its rate of change or the slope of the fitted trend through a sliding window, and prediction of screen blockage when the slope exceeds the first threshold. Simultaneously monitor the turbidity of the filtrate in real time. When the turbidity exceeds the preset turbidity control upper limit, it is determined that the screen is damaged or the separation efficiency has decreased. The system logically combines two conditions: abnormal differential pressure trend and excessive turbidity. When either condition is met, a maintenance warning is issued and the warning information is pushed to the central control platform.

7. The method according to claim 1, characterized in that, It also includes the step of setting a fixed value for closed-loop control of the filtrate turbidity: Set the target value for filtrate turbidity, and use the deviation between the measured value and the target value of filtrate turbidity as input to adjust the screen washing cycle or washing intensity, or use the deviation signal to correct the cone resistance setting value so that the filtrate turbidity is maintained within the target range. When the turbidity continues to deviate and adjustment fails, a high-level maintenance warning is triggered.

8. A digital monitoring system for solid-liquid separation of pig farm manure, characterized in that, include: The data acquisition module is used to collect data on the feed mass flow rate, feed solid content, drive motor current, solid phase discharge moisture content, and filtrate turbidity during the solid-liquid separation process. The processing module is used to compare the drive motor current with a preset warning threshold and an overload threshold, wherein the warning threshold is lower than the overload threshold; The processing module is also used to immediately control the discharge port cone actuator to increase the opening to reduce back pressure when the current of the drive motor exceeds the overload threshold, simultaneously reduce the feed flow rate, and maintain the motor operating frequency unchanged to accelerate discharge until the current drops below the warning threshold. The processing module is also used to adjust the discharge cone resistance separately to control the moisture content in a closed loop when the current of the drive motor is below the overload threshold, based on the deviation between the solid phase discharge moisture content and the target value, and combined with the feed solid content as a feedforward signal; at the same time, it adjusts the motor operating frequency according to the feed mass flow rate and the feed solid content to make the processing capacity match the incoming load. The execution module is used to perform time integration on the product of the feed mass flow rate and the feed solid content to obtain the cumulative solids processing volume; based on the long-term change trend of the pressure difference before and after the screen and the comparison between the real-time value of the filtrate turbidity and the preset threshold, the equipment maintenance warning is triggered when the filtrate turbidity exceeds the threshold or the pressure difference trend is abnormal.

9. A computer device, characterized in that, The computer device includes a memory and a processor, the memory storing code, and the processor being configured to acquire the code and execute the intelligent monitoring method for solid-liquid separation of pig farm manure as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the intelligent monitoring method for solid-liquid separation of pig farm manure as described in any one of claims 1 to 7.

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