An automatic control system for slurry concentration

Abstract

This invention discloses an automatic control system for slurry concentration, comprising: a slurry storage unit, a water replenishment unit, a heating unit, a measurement unit, and a control unit. The slurry storage unit includes a slurry storage tank. The measurement unit and the slurry storage unit form a closed-loop circulation system, including a circulation pump, multiple sampling tubes, a concentration sensor, and a return pipe. The multiple sampling tubes sample slurry at different locations in the slurry storage tank. The circulation pump drives the slurry to be drawn out from the sampling tubes, flows sequentially through the concentration sensor, and returns to the slurry storage tank through the return pipe. The concentration sensor detects the slurry concentration at different locations in real time and transmits the data to the control unit. The control unit calculates the average concentration and concentration variance of the multi-point samples to adjust the stirring speed, and combines the current slurry weight with the target concentration. If the concentration is too high, water is added; if it is too low, water is heated to reduce water loss. This reduces equipment energy consumption and mechanical wear, achieves automated slurry concentration adjustment, and improves the stability, comprehensiveness, and accuracy of concentration detection.

Description

Technical Field

[0001] This invention relates to the field of slurry pipeline transportation technology, specifically to an automatic control system and method for slurry concentration, applicable to transportation scenarios in industries such as mining, metallurgy, and chemicals where precise control of slurry concentration is required. Background Technology

[0002] During slurry pipeline transportation, slurry concentration is a critical control parameter, directly affecting transportation efficiency, pipeline wear, and subsequent process effectiveness. Current slurry concentration control methods primarily rely on manual sampling and adjustment, which has the following drawbacks: 1. The sampling method is singular, only collecting slurry from a single point, which cannot reflect the overall uniformity of the slurry concentration, resulting in large measurement errors; 2. The adjustment is delayed; there is a time lag between manual detection and operation, making it difficult to respond to concentration changes in real time. 3. Low control precision, relying on operator experience to judge the amount of water to be added or lost, which easily leads to over-adjustment or under-adjustment; 4. Low level of automation, high labor intensity, and unable to meet the needs of continuous production.

[0003] Although some existing automatic control schemes attempt to use single-point concentration detection + pump valve control, they have not formed a closed-loop feedback mechanism and have not solved the measurement deviation problem caused by uneven concentration between the upper and lower layers of the slurry, so they still cannot achieve accurate and stable concentration control. Summary of the Invention

[0004] The present invention aims to solve the problems of the lack of a closed-loop feedback mechanism for slurry concentration in the existing slurry pipeline transportation technology, and the failure to solve the measurement deviation problem caused by uneven concentration between the upper and lower layers of slurry, thus failing to achieve accurate and stable concentration control.

[0005] To achieve the above objectives, the present invention relates to an automatic control system for slurry concentration, comprising: It includes a slurry storage unit, a water replenishment unit, a heating unit, a measurement unit, and a control unit, with each unit working together to form a closed-loop control system; The slurry storage unit includes a slurry storage tank. A weighing sensor is installed at the bottom of the slurry storage tank to collect the total weight of the slurry in the tank in real time and transmit it to the control unit. A stirrer is installed inside the slurry storage tank to ensure that the slurry is mixed evenly and to avoid local concentration deviations. The heating unit is used to control the temperature of the slurry inside the slurry storage tank; The measuring unit and the slurry storage unit form a closed-loop circulation system, including a circulation pump, multiple sampling tubes, a concentration sensor, and a return pipe. The multiple sampling tubes sample slurry at different locations in the slurry storage tank (e.g., at heights of 70%-80%, 40%-50%, and 10%-20% of the tank height from the bottom). The circulation pump drives the slurry to be drawn out from the sampling tubes, flows sequentially through the concentration sensor, and then returns to the slurry storage tank through the return pipe. The concentration sensor detects the slurry concentration at different locations in real time and transmits the data to the control unit. The control unit is connected to the weighing sensor, water supply pump, flow regulating valve, electric heating assembly, temperature sensor, circulation pump, and concentration sensor respectively; the control unit calculates the average concentration from multiple sampling points. The stirring speed is adjusted based on the concentration variance, and the current slurry weight is also considered. With target concentration When the concentration is too high, follow Replenish moisture; press when low. Water loss due to heating.

[0006] Furthermore, the sampling tube inlet is equipped with a filter screen.

[0007] Furthermore, the water replenishment unit includes a water storage tank, a water replenishment pump, a flow regulating valve, and a water replenishment pipe connected in sequence via pipes. The other end of the water replenishment pipe is connected to the slurry storage tank. The water replenishment pump and the flow regulating valve are respectively connected to the control unit via signals. The control unit can start the water replenishment pump and adjust the flow regulating valve according to the concentration deviation command to replenish a certain amount of water to the slurry storage tank.

[0008] Furthermore, the heating unit includes an electric heating component, a temperature sensor, and an insulation layer. The electric heating component is embedded in the side wall interlayer of the slurry storage tank, and the insulation layer is wrapped around the outside of the slurry storage tank. The temperature sensor is used to monitor the slurry temperature in real time and feed it back to the control unit. The control unit controls the water evaporation rate by adjusting the heating power.

[0009] Furthermore, different positions include different positions in the height direction, different positions in the circumferential position direction, and different positions in the radial direction.

[0010] Furthermore, the control unit calculates the average concentration from multiple sampling points. Methods for adjusting stirring speed based on concentration variance include: The control unit receives multi-point slurry concentration values ​​detected by the measurement unit. ( After that, first calculate the concentration variance. (in For multi-point average concentration, Then, based on the relationship between variance and threshold, the rotation speed of the agitator (3) in the slurry storage unit is dynamically adjusted: like The stirrer (3) maintains the current reference speed. ;like According to the speed correction formula Adjust the speed, among which The variance-speed linkage coefficient (values ​​range from 0.3 to 0.8), and the adjusted speed Not exceeding the preset maximum speed ( After adjusting the stirring speed, re-detect the concentration at multiple points and calculate the variance every 1-2 minutes until... Restore the reference speed .

[0011] Furthermore, the combination of the current slurry weight With target concentration When the concentration is too high, follow Replenish moisture; press when low. Methods of heat-induced water loss include: The automatic slurry concentration control process first achieves the target concentration through the control unit. Concentration tolerance The initial setup is completed and the agitator is started to mix the slurry in the storage tank evenly. Then, the circulation pump is started to extract slurry from multiple points at different heights in the storage tank. After the concentration sensor detects the slurry, the control unit calculates the average concentration. ; then according to and The comparison results generate corresponding instructions; when the concentration is too high, press [the appropriate command]. Calculate the water replenishment volume and start the water replenishment pump and flow control valve to replenish water until the slurry weight reaches the target. Then stop; if the concentration is too low, press Calculate the water loss and activate the electric heating unit to heat the slurry, while simultaneously monitoring the temperature using a temperature sensor until the slurry weight drops to [a certain value]. If the concentration is within acceptable limits, all units should remain on standby and the sampling and testing should be repeated periodically. After the water replenishment or heating operation is completed, the sampling and testing steps should be repeated again. If the concentration is still not up to standard, the concentration judgment and adjustment process should be repeated until the concentration is within acceptable limits.

[0012] Furthermore, this includes a graded adjustment method, characterized by: using micro-flow water replenishment or low-temperature slow-release heating (heating power reduced to 30%-50%) when the concentration deviation is small, to avoid over-adjustment; When the concentration deviation is large, quantitative water replenishment / full heating is used, and the stirrer is accelerated to speed up the uniform mixing of the slurry.

[0013] Furthermore, when the concentration deviation is large, the control unit is assumed to have a pre-stored concentration deviation that is much greater than the threshold ΔC2, i.e., when... At the same time, the stirring speed-up parameters are calculated using the following method, and the full water replenishment / heating and stirring speed-up are adjusted simultaneously: Adjustment formula: ; : The speed of the mixer after the speed increase; : The reference speed of the stirrer; : Linkage coefficient (0.2-0.4), which quantifies the correlation between the degree of deviation and the acceleration magnitude, and its range is obtained through multiple tests; : Current average concentration of the slurry at multiple points; Target concentration; Large concentration deviation threshold.

[0014] Compared with the prior art, the present invention has the following advantages: 1. Employing a multi-unit collaborative closed-loop control system (slurry storage + water replenishment + heating + measurement + control unit) to achieve automated adjustment of slurry concentration and ensure the reliability of collaborative linkage among all links; 2. Multiple sampling tubes are used to sample at different locations in the height, circumference, and radial direction of the slurry storage tank, and closed-loop detection is performed to avoid local concentration deviations affecting the test results and improve the comprehensiveness and accuracy of concentration detection; 3. The technical effect of installing a filter screen at the inlet of the sampling tube to prevent impurities from clogging the sampling tube and sensor, and to ensure the long-term stable operation of the measurement unit; 4. By adopting a large deviation threshold judgment, full water replenishment / heating and stirring speed-up synchronous linkage, the technical effect of balancing the reliability of basic concentration adjustment and rapid response to large deviations is achieved, the slurry is accelerated to be mixed evenly, and the concentration adjustment cycle is shortened. Through nonlinear stirring speed adjustment, the speed is prevented from being excessively increased as the concentration deviation increases, the equipment energy consumption and mechanical wear are reduced, and the stability of the large deviation adjustment process is ensured. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system structure of a preferred embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the installation of the sampling tube according to a preferred embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0018] Please refer to Figure 1 The embodiments of the present invention relate to an automatic control system for slurry concentration, including a slurry storage unit, a water replenishment unit, a heating unit, a measurement unit, and a control unit, wherein each unit works together to form a closed-loop control system; The slurry storage unit includes a slurry storage tank 1 (non-sealed), a weighing sensor 2 is installed at the bottom of the slurry storage tank 1 for real-time acquisition of the total weight of the slurry in the tank and transmission to the control unit, and a stirrer 3 is installed inside the slurry storage tank 1 to ensure uniform mixing of the slurry and avoid local concentration deviations. The measuring unit and the slurry storage unit form a closed-loop circulation system, including a circulation pump 11, multiple sampling tubes 14, a concentration sensor 12, and a return pipe. The multiple sampling tubes sample slurry at different locations in the slurry storage tank 1, for example, at heights of 70%-80%, 40%-50%, and 10%-20% of the tank height from the bottom. The circulation pump 11 drives the slurry to be drawn out from the sampling tubes, flows sequentially through the concentration sensor 12, and then returns to the slurry storage tank 1 through the return pipe. The concentration sensor 12 detects the slurry concentration at different locations in real time and transmits the data to the control unit. In some preferred embodiments, 1-2 sets of backup concentration sensors can be added to the pipeline, and a "main and auxiliary sensor comparison and verification" mode can be adopted: when the difference between the detection value of the main sensor and the auxiliary sensor exceeds a preset threshold (such as ±0.3%), the system will automatically switch to the backup sensor and issue a calibration alarm to avoid control failure caused by a single sensor failure. The control unit is connected to the weighing sensor 2, the water supply pump 8, the flow regulating valve 9, the electric heating assembly 5, the temperature sensor 6, the circulation pump 11, and the concentration sensor 12 respectively; the control unit calculates the average concentration from multiple sampling points. The stirring speed is adjusted based on the concentration variance, and the current slurry weight is also considered. With target concentration When the concentration is too high, follow Replenish moisture; press when low. Water loss due to heating.

[0019] The methods include: S1: Initialization settings: Input the target concentration via the control unit. and concentration tolerance ( ), start the agitator 3 of the slurry storage unit to make the slurry in the slurry storage tank 1 mix evenly; S2: Circulating Sampling and Detection: Start the circulating pump 11 of the measurement unit to extract slurry from multiple points at different heights in the slurry storage tank 1, and obtain the concentration values ​​at multiple points by the concentration sensor 12. ( The control unit calculates the average concentration. ; S3: Concentration Judgment and Command Generation: ①If (Concentration too high): The control unit adjusts the current slurry weight accordingly. Target concentration Current average concentration The required water replenishment volume is calculated using a formula. Generate a water replenishment command; ②If (Concentration too low): The control unit calculates the required water loss. Generate heating instructions; ③If (Concentration qualified): Maintain the standby state of each unit and repeat step (2) every preset time. S4: Water Replenishment Adjustment: The control unit starts the water replenishment pump 8 and flow regulating valve 9 of the water replenishment unit, replenishing water according to the calculated amount. Water is added to slurry storage tank 1; weighing sensor 2 monitors the weight change of the slurry in real time, and when the weight reaches... When this happens, the control unit outputs a stop command, shutting down the water supply pump 8 and the flow regulating valve 9; S5: Heating Adjustment: The control unit activates the electric heating component 5 of the heating unit; the temperature sensor 6 monitors the slurry temperature in real time (controlling the temperature to not exceed a preset threshold); the weighing sensor 2 monitors the slurry weight change in real time, and when the weight drops to... When this occurs, the control unit outputs a stop command to shut down the electric heating component 5; S6: Secondary test confirmation: After the water replenishment or heating operation is completed, repeat step 2 to test the concentration. If the concentration still exceeds the allowable deviation range, repeat steps S3 to S5 until the concentration is qualified. In some preferred embodiments, the water replenishment unit includes a water storage tank 7, a water replenishment pump 8, a flow regulating valve 9, and a water replenishment pipe 10 connected in sequence by pipes. The other end of the water replenishment pipe 10 is connected to the slurry storage tank 1. The water replenishment pump 8 and the flow regulating valve 9 are respectively connected to the control unit. The control unit can start the water replenishment pump 8 and regulate the flow regulating valve 9 according to the concentration deviation command to replenish a certain amount of water into the slurry storage tank 1.

[0020] In some preferred embodiments, the heating unit includes an electric heating component 5, a temperature sensor 6, and an insulation layer 4. The electric heating component 5 is embedded in the side wall interlayer of the slurry storage tank 1, and the insulation layer 4 is wrapped around the outside of the slurry storage tank 1. The temperature sensor 6 is used to monitor the slurry temperature in real time and feed it back to the control unit. The control unit controls the water evaporation rate by adjusting the heating power.

[0021] In some preferred embodiments, the above-mentioned electric heating unit can be modified to zone heating: the electric heating component is divided into upper, middle and lower zones, and according to the slurry stratification (detected by multi-point temperature sensors), for example, only the area with low concentration (when the lower layer of slurry has a low concentration, the lower layer is heated) is targeted for heating to reduce energy consumption.

[0022] Please refer to Figure 2 In some preferred embodiments, the slurry in the storage tank is prone to concentration stratification in the vertical direction, localized concentration unevenness in the circumferential direction, and concentration differences between the center and the tank wall in the radial direction due to factors such as gravity settling, dead zones of agitation, and impact of feeding. Multi-dimensional and multi-point sampling can comprehensively capture the true concentration distribution of the slurry in the tank; therefore, samples can be taken at different locations in the storage tank, including different locations in the vertical direction, different locations in the circumferential direction, and different locations in the radial direction.

[0023] In some preferred embodiments, the control unit calculates the average concentration from multiple samples. Methods for adjusting stirring speed based on concentration variance include: The control unit receives multi-point slurry concentration values ​​detected by the measurement unit. ( After that, first calculate the concentration variance. (in For multi-point average concentration, Then, based on the relationship between variance and threshold, the rotation speed of the agitator (3) in the slurry storage unit is dynamically adjusted: like The stirrer (3) maintains the current reference speed. ;like According to the speed correction formula Adjust the speed, among which The variance-speed linkage coefficient (values ​​range from 0.3 to 0.8), and the adjusted speed Not exceeding the preset maximum speed ( After adjusting the stirring speed, re-detect the concentration at multiple points and calculate the variance every 1-2 minutes until... Restore the reference speed .

[0024] The concentration variance-speed linkage coefficient k (ranging from 0.3 to 0.8) is a core parameter for adjusting the concentration uniformity requirements, system operating costs, and slurry stability. Its value directly affects the response intensity of the stirring speed, slurry mixing efficiency, energy consumption, and equipment wear, specifically as follows: When K is set to a high value, for high-viscosity slurries (such as thick mineral slurries and chemical slurries), easily stratified slurries, or scenarios with extremely high requirements for concentration uniformity (e.g., measurement error must be ≤ ±0.5%), when the concentration variance exceeds the threshold, the stirring speed can be increased significantly, which can quickly break up slurry stratification and shorten the concentration homogenization time. However, excessively high speed leads to a significant increase in energy consumption; the slurry shear force increases, which may damage the physical properties of sensitive slurries (such as slurries containing easily broken particles); the wear of the agitator bearings and blades is accelerated, reducing the service life of the equipment.

[0025] When K is set to a low value, for low-viscosity slurries (such as thin mud slurries, ordinary chemical slurries), slurries that are not easy to separate, or scenarios that are sensitive to energy consumption and equipment wear (such as continuous production that requires control of operating costs), the concentration homogenization efficiency is reduced, and it takes longer to reduce the variance below the threshold. In practical applications, the optimal value needs to be calibrated within the range based on the slurry viscosity, stratification characteristics, process precision requirements, and energy consumption budget. This ensures that the concentration uniformity meets the standards while controlling operating costs and equipment wear within a reasonable range.

[0026] In some preferred embodiments, the stirring speed can be correlated not only with the concentration variance but also with the concentration deviation: when the concentration deviation is large and the variance is large, the stirring speed is not only corrected according to the variance but also needs to be superimposed with the concentration deviation linkage coefficient (for example, the larger the concentration deviation, the upper limit of the stirring speed can be temporarily relaxed to shorten the mixing time); when the concentration is close to the target value, the stirring speed is reduced in advance to avoid slurry splashing or bubble generation caused by over-stirring.

[0027] In some preferred embodiments, a graded adjustment method is also included: when the concentration deviation is small, micro-flow water replenishment or low-temperature slow-release heating (heating power reduced to 30%-50%) is used to avoid over-adjustment; when the concentration deviation is large, quantitative water replenishment / full heating is used, and the agitator 3 is accelerated to speed up the uniform mixing of the slurry. Specifically, in some embodiments, when the concentration deviation is large, the control unit is pre-stored that the concentration deviation is greater than the threshold ΔC2, that is, when... At that time, the following model is used to calculate the stirring speed-up parameters, and the full water replenishment / heating and stirring speed-up are adjusted in conjunction with each other simultaneously: Adjustment model: ; : The speed of the mixer after the speed increase; : The reference speed of the stirrer; : Linkage coefficient (e.g., 0.2-0.4), which quantifies the correlation between the degree of deviation and the acceleration magnitude, and its range is obtained through multiple tests; : Current average concentration of the slurry at multiple points; Target concentration; Large concentration deviation threshold.

[0028] Please refer to Figure 2 To ensure the objectivity and comprehensiveness of sampling, the sampling tube can take samples at different locations in the slurry storage tank, including different locations in the vertical direction, circumferential direction, and radial direction. The sampling tube inlet is equipped with a filter screen. The screen aperture is larger than the maximum particle size of suspended particles in the slurry (e.g., the screen aperture is 1.5-1.8 times the maximum particle size). A miniature pressure sensor and a pulse drive module are connected in series on the sampling branch pipe. The miniature pressure sensor is connected to the control unit. When the pressure value detected in the pipeline exceeds a preset threshold, the control unit determines that the pipeline is blocked and immediately activates the pulse drive module to perform enhanced pulse cleaning (e.g., increasing the peak flow rate to 4 times the normal sampling flow rate and increasing the number of pulses to 10-15). After cleaning, the pressure is re-checked. If it still exceeds the limit, a blockage alarm signal is issued and maintenance is prompted. In some preferred embodiments, a "microbubble separator" (such as a cyclone separator) can be added after the filter screen at the inlet of the sampling tube to separate the bubbles entrained in the slurry by centrifugal force; at the same time, a pressure stabilizing chamber is set at the front end of the concentration sensor 12 to avoid the interference of bubbles on the concentration detection (such as electromagnetic sensors).

[0029] In some preferred embodiments, a flow guiding assembly is also included, which is fixedly mounted on the outlet end of the return pipe. The flow guiding assembly includes an annular flow guiding seat and a plurality of flow guiding plates evenly distributed circumferentially on the flow guiding seat. The annular flow guiding seat is fixedly connected to the top of the inner wall of the slurry tank, and the flow guiding plates are inclined toward the inside of the slurry tank. This allows the return slurry to form a uniform diffusion flow field after being diverted by the flow guiding plates, rather than directly impacting the slurry in the tank, thus preventing instability in concentration.

[0030] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0031] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic control system for slurry concentration, characterized in that, include: It includes a slurry storage unit, a water replenishment unit, a heating unit, a measurement unit, and a control unit, with each unit working together to form a closed-loop control system; The slurry storage unit includes a slurry storage tank (1), and a weighing sensor (2) is provided at the bottom of the slurry storage tank (1) for real-time acquisition of the total weight of the slurry in the tank and transmission to the control unit. A stirrer (3) is provided inside the slurry storage tank (1) to ensure uniform mixing of the slurry and avoid local concentration deviations. The heating unit is used to control the temperature of the slurry inside the slurry storage tank; The measuring unit and the slurry storage unit form a closed-loop circulation system, including a circulation pump (11), multiple sampling tubes (14), a concentration sensor (12), and a return pipe; the multiple sampling tubes sample slurry at different locations in the slurry storage tank (1); the circulation pump (11) drives the slurry to be drawn out from the sampling tubes, flows through the concentration sensor (12) in sequence, and then returns to the slurry storage tank (1) through the return pipe; the concentration sensor (12) detects the slurry concentration at different locations in real time and transmits it to the control unit; The control unit is connected to the weighing sensor (2), water pump (8), flow regulating valve (9), electric heating assembly (5), temperature sensor (6), circulation pump (11), and concentration sensor (12) respectively; the control unit calculates the average concentration of multi-point sampling. The stirring speed is adjusted based on the concentration variance, and the current slurry weight is also considered. With target concentration When the concentration is too high, follow Replenish moisture; press when low. Water loss due to heating; The control unit calculates the average concentration from multiple samples. Methods for adjusting stirring speed based on concentration variance include: The control unit receives multi-point slurry concentration values ​​detected by the measurement unit. Afterwards, among them First calculate the concentration variance. ,in For multi-point average concentration, Then, the rotation speed of the agitator (3) in the slurry storage unit is dynamically adjusted according to the relationship between variance and threshold: like The stirrer (3) maintains the current reference speed. ;like , Correction formula based on rotational speed Adjust the speed, among which This is the variance-speed linkage coefficient, ranging from 0.3 to 0.8, and the adjusted speed... Not exceeding the preset maximum speed ,in, After adjusting the stirring speed, re-detect the concentration at multiple points and calculate the variance every 1-2 minutes until... Restore the reference speed ; The combination of current slurry weight With target concentration When the concentration is too high, follow Replenish moisture; press when low. Methods of heat-induced water loss include: The automatic slurry concentration control process first achieves the target concentration through the control unit. Concentration tolerance The initial setup is completed and the agitator is started to mix the slurry in the storage tank evenly. Then, the circulation pump is started to extract slurry from multiple points at different heights in the storage tank. After the concentration sensor detects the slurry, the control unit calculates the average concentration. ; then according to and The comparison results generate corresponding instructions; when the concentration is too high, press [the appropriate command]. Calculate the water replenishment volume and start the water replenishment pump and flow control valve to replenish water until the slurry weight reaches the target. Then stop; if the concentration is too low, press Calculate the water loss and activate the electric heating unit to heat the slurry, while simultaneously monitoring the temperature using a temperature sensor until the slurry weight drops to [a certain value]. After stopping, if the concentration is qualified, each unit will remain on standby and the sampling and testing will be repeated periodically. After the water replenishment or heating operation is completed, the sampling and testing steps must be repeated again. If the concentration is still not qualified, the concentration judgment and adjustment process will be repeated until the concentration is qualified.

2. The automatic slurry concentration control system according to claim 1, characterized in that, The sampling tube inlet is equipped with a filter screen.

3. The automatic slurry concentration control system according to claim 1, characterized in that, The water replenishment unit includes a water storage tank (7), a water replenishment pump (8), a flow regulating valve (9), and a water replenishment pipe (10) connected in sequence by pipes. The other end of the water replenishment pipe (10) is connected to the slurry storage tank (1). The water replenishment pump (8) and the flow regulating valve (9) are respectively connected to the control unit. The control unit can start the water replenishment pump (8) and regulate the flow regulating valve (9) according to the concentration deviation command to replenish a certain amount of water into the slurry storage tank (1).

4. The automatic slurry concentration control system according to claim 1, characterized in that, The heating unit includes an electric heating component (5), a temperature sensor (6), and an insulation layer (4). The electric heating component (5) is embedded in the side wall interlayer of the slurry storage tank (1), and the insulation layer (4) is wrapped around the outside of the slurry storage tank (1). The temperature sensor (6) is used to monitor the slurry temperature in real time and feed it back to the control unit. The control unit controls the water evaporation rate by adjusting the heating power.

5. The automatic slurry concentration control system according to claim 1, characterized in that, The Different positions include different positions in the height direction, different positions in the circumferential direction, and different positions in the radial direction.

6. The automatic slurry concentration control system according to claim 1, characterized in that, This includes methods for graded adjustment: when the concentration deviation is small, use micro-flow water replenishment or low-temperature slow-release heating to avoid over-adjustment; When the concentration deviation is large, quantitative water replenishment or full heating is used, and the stirrer (3) is accelerated to speed up the uniform mixing of the slurry.

7. The automatic slurry concentration control system according to claim 1, characterized in that, When the concentration deviation is large, the control unit is assumed to have a pre-stored concentration deviation greater than a threshold. That is, when At that time, the following model is used to determine the stirring speed-up parameters, and the full water replenishment or heating is simultaneously adjusted in conjunction with the stirring speed-up: Adjustment model: ; : The speed of the mixer after the speed increase; : The reference speed of the stirrer; The correlation coefficient is 0.2-0.4, which is the correlation between the degree of quantitative deviation and the speed-up magnitude. The range was determined through multiple tests. : Current average concentration of the slurry at multiple points; Target concentration; Large concentration deviation threshold.

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