Acid bath plasticizing tank and control system thereof

Abstract

The invention relates to the technical field of intelligent control, in particular to an acid bath plasticizing tank and a control system thereof. The system comprises a data collection unit used for collecting real-time data related to a sulfuric acid solution; the data processing center is used for obtaining the change trend of the temperature of the sulfuric acid solution according to the collected real-time data related to the sulfuric acid solution, obtaining the concentration adjustment value of the sulfuric acid solution according to the change trend of the temperature, and adjusting the balance between the concentration and the liquid level of the sulfuric acid solution; when the balance between the concentration and the liquid level is adjusted, the relation between the temperature and the liquid level is introduced for optimization; the execution control unit is used for updating the concentration adjustment value of the sulfuric acid solution in the tank body, continuously observing the condition in the tank body, and giving an alarm if an abnormal condition occurs. According to the acid bath plasticizing tank and the control system thereof, the change of the liquid level can be predicted more accurately, so that the condition of accidental overflow or insufficiency is avoided, the risk of equipment damage is reduced, and the service life of the equipment is prolonged. And the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of intelligent control technology, in particular to an acid bath plasticizing tank and a control system thereof. Background Art

[0002] In the development of the chemical fiber industry, various new fiber products are increasing. In the production of viscose staple fibers, the acid station must send the acid bath that meets the requirements to the acid bath tank of the spinning machine to ensure the normal operation of the spinning machine. Acid bath treatment is an important process of spinning. The spinning must undergo acid bath treatment before entering the spinning machine. The quality of the acid bath directly affects the quality of the finished product. Unstable liquid level will lead to unstable production process, affecting production efficiency and product quality. Too high liquid level will cause damage to the tank structure, and too low liquid level will cause overheating and damage to the heating element. Therefore, in the prior art, the prediction of liquid level does not take into account the influencing factors of temperature. Changes in temperature will cause changes in liquid volume, which will in turn affect the liquid level. Failure to consider the impact of temperature will cause the liquid level to be too high and overflow, or the liquid level is too low and cannot meet production needs. Therefore, an acid bath plasticizing tank and its control system are designed. Summary of the invention

[0003] The object of the present invention is to provide an acid bath plasticizing tank and its control system to solve the problem that the liquid level prediction proposed in the above background technology does not take into account the influence of temperature, resulting in the liquid level being too high and overflowing, or the liquid level being too low and unable to meet production needs.

[0004] To achieve the above object, the present invention provides an acid bath plasticizing tank and a control system thereof, comprising: Data collection unit: used to collect real-time data related to the sulfuric acid solution in the tank, wherein the real-time data includes sulfuric acid solution data, sulfuric acid solution concentration data, liquid level data of the sulfuric acid solution in the tank, and input power to the sulfuric acid solution heating system; Data processing center: used to obtain the temperature change trend of the sulfuric acid solution according to the real-time data collected related to the sulfuric acid solution, obtain the concentration adjustment value of the sulfuric acid solution according to the temperature change trend, and adjust the balance between the concentration and the liquid level of the sulfuric acid solution at the same time, and introduce the relationship between the temperature and the liquid level for optimization when adjusting the balance between the concentration and the liquid level; Among them, the data processing center includes a storage processing module, an analysis and prediction module, and an adjustment and verification module; Execution control unit: used to update the concentration adjustment value of the sulfuric acid solution in the tank, and continuously observe the situation inside the tank, and issue an alarm if any abnormal situation occurs.

[0005] As a further improvement of the present technical solution, the data processing center also includes a controller, the operations of the analysis and prediction module are executed in the controller, and the controller can verify the input parameters.

[0006] As a further improvement of the technical solution, in the data processing center, the storage processing module is used to store the collected real-time data related to the sulfuric acid solution and the historical data related to the sulfuric acid solution, and pre-process the real-time data; The analysis and prediction module is used to predict the temperature change trend of the sulfuric acid solution according to the data of the storage and processing module, and obtain the concentration adjustment value of the sulfuric acid solution according to the temperature change trend, and adjust the balance between the concentration and the liquid level of the sulfuric acid solution according to the concentration adjustment value. When the predicted liquid level is normal, the concentration adjustment value is transmitted to the adjustment verification module, and the concentration value is continued to be adjusted according to the feedback result of the adjustment verification module; The adjustment and verification module is used to adjust the parameters in the controller according to the concentration value transmitted by the analysis and prediction module, continuously monitor the liquid level value in the controller, and determine whether the liquid level exceeds the preset safety threshold. If the liquid level value continues to not exceed the preset safety threshold, the concentration adjustment value is transmitted to the execution control unit. Otherwise, the judgment result is fed back to the analysis and prediction module.

[0007] As a further improvement of the technical solution, the analysis and prediction module involves predicting the change trend of the temperature of the sulfuric acid solution according to the data of the storage and processing module, as follows: S1. Extract key features from the data in the storage processing module and standardize the key features to the same scale; the key features include the sliding window average of the time series data , the rate of change of temperature , Input power of heating system ; S2. Build LSTM model: Internal state of LSTM cell: ; in, is the cell state at the current time step; is the output of the forget gate; is the cell state at the previous time step; is the output of the input gate; is the candidate unit status; represents element-wise multiplication; Output of LSTM cell: ; in, is the hidden state of the current time step; is the output of the output gate; is the hyperbolic tangent function; ; ; ; in, is the Sigmoid activation function; is the weight matrix of the forget gate; is the cell state at the previous time step; is the input feature vector; ; is the bias term of the forget gate; is the weight matrix of the input gate; is the bias term of the input gate; is the weight matrix of the output gate; is the bias term of the output gate; ; in, is the weight matrix of the candidate unit; is the bias term of the candidate unit; ; in, The predicted sulfuric acid solution at time Temperature value at the moment; is the weight matrix from the hidden state to the output layer; is the bias term of the output layer.

[0008] As a further improvement of the technical solution, the analysis and prediction module involves obtaining the sulfuric acid solution concentration adjustment value according to the temperature change trend, as follows: ; in, For sulfuric acid solution at temperature Solubility at ; is the sulfuric acid solution at the reference temperature Solubility under is the temperature coefficient; is the current temperature of the sulfuric acid solution; is the reference temperature of sulfuric acid solution; ; in, is the mass of the solute in the sulfuric acid solution; The concentration of sulfuric acid solution to be maintained; is the volume of the solute; ; in, For the temperature The mass of the solute in the sulfuric acid solution below; ; in, is the change in solute mass; if , that is, the mass of the solute increases, then it is necessary to add diluent to the sulfuric acid solution; if , that is, the mass of the solute decreases, so it is necessary to add solute to the sulfuric acid solution; The final mass of the solute Meeting the set concentration requirements means: ; is the volume of the tank, is the molar mass of the solute.

[0009] As a further improvement of the technical solution, the balance between the concentration and the level of the sulfuric acid solution is adjusted according to the concentration adjustment value in the analysis and prediction module, as follows: ; in, To increase the volume of sulfuric acid solution after the solute; is the density of sulfuric acid solution; ; in, is the height increased by the sulfuric acid solution; is the bottom area of ​​the cuboid above the trough; ; in, is the liquid level value of sulfuric acid solution; is the original height of the sulfuric acid solution; if , then reduce the volume of sulfuric acid solution in the tank before adjusting the concentration. is the maximum safe liquid height of the container; ; in, The volume of sulfuric acid solution that needs to be reduced.

[0010] As a further improvement of the technical solution, the relationship between temperature and liquid level is introduced to optimize when adjusting the balance between the concentration and the liquid level, specifically: ; in, is the evaporation rate of sulfuric acid solution; is the proportionality constant; For the temperature Saturated vapor pressure under is the actual vapor pressure; ; in, is the volume of sulfuric acid solution evaporated per unit time; is the time interval; but: ; in, The height to which the sulfuric acid solution is lowered by temperature; ; in, is the optimized liquid level value; if , reduce the volume of sulfuric acid solution in the tank before adjusting the concentration.

[0011] As a further improvement of the present technical solution, the abnormal conditions in the execution control unit include the temperature of the sulfuric acid solution exceeding its safety threshold, the liquid level of the sulfuric acid solution exceeding its safety threshold, and the concentration of the sulfuric acid solution exceeding its safety threshold. As long as any one of these conditions occurs, an alarm will be issued.

[0012] Provided is an acid bath plasticizing tank, comprising a tank body, wherein a temperature sensor, a concentration sensor and a liquid level sensor are installed on the inner wall of the tank body, wherein the temperature sensor is used to detect temperature data of a sulfuric acid solution, the concentration sensor is used to detect concentration data of the sulfuric acid solution, and the liquid level sensor is used to monitor liquid level data of the sulfuric acid solution; a steam pipe is provided near the bottom of the tank body, wherein the steam pipe is connected to a sulfuric acid solution heating system, and the sulfuric acid solution heating system adjusts the temperature of the steam pipe, thereby controlling the temperature of the sulfuric acid solution; a drain pipe is connected to the bottom of the tank body, and when the volume of the sulfuric acid solution needs to be reduced, the sulfuric acid solution is discharged from the drain pipe, and a control valve is provided above the drain pipe.

[0013] As a further improvement of the technical solution, a transparent cover is hingedly installed on one side of the trough body, a handle is fixedly installed on the outer surface of the transparent cover, a plurality of wire pressing parts are fixedly installed on the inner surface of the transparent cover, and wire guide ports are fixedly installed on both sides of the inner surface of the transparent cover, and a plurality of hoses are opened through the trough body, and the hoses are used to discharge the steam of the sulfuric acid solution, and the plurality of hoses and the plurality of wire pressing parts are evenly distributed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the acid bath plasticizing tank and control system thereof, by considering the influence of the temperature of the sulfuric acid solution on the volume of the sulfuric acid solution, the change of the liquid level of the sulfuric acid solution can be predicted more accurately, thereby avoiding accidental overflow or shortage. By accurately controlling the liquid level of the sulfuric acid solution, the risk of damage to the tank body can be reduced, thereby reducing maintenance costs. The system can better adapt to changes in ambient temperature, thereby improving its adaptability under different environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall flow chart of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0016] The meaning of each number in the figure is: 1. Tank body; 2. Transparent cover; 21. Hose; 22. Wire pressing piece; 23. Wire guide port; 24. Handle; 3. Steam pipe; 4. Drain pipe; 41. Control valve; 10. Data collection unit; 20. Data processing center; 201. Storage processing module; 202. Analysis and prediction module; 203. Adjustment and verification module; 204. Controller; 30. Execution control unit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 2 As shown, an acid bath plasticizing tank is provided, including a tank body 1, wherein a temperature sensor, a concentration sensor and a liquid level sensor are installed on the inner wall of the tank body 1, wherein the temperature sensor is used to detect the temperature data of the sulfuric acid solution, the concentration sensor is used to detect the concentration data of the sulfuric acid solution, and the liquid level sensor is used to monitor the liquid level data of the sulfuric acid solution. A steam pipe 3 is provided near the bottom of the tank body 1, and the steam pipe 3 is connected to the sulfuric acid solution heating system. The sulfuric acid solution heating system adjusts the temperature of the steam pipe 3, thereby controlling the temperature of the sulfuric acid solution, and can effectively heat the sulfuric acid solution to ensure the temperature conditions required by the sulfuric acid solution during the plasticizing process. The steam pipe is powered by the heating system to ensure that the heat supply is stable and controllable. The steam pipe 3 is detachable, which is convenient for maintenance, cleaning or replacement of damaged parts, thereby reducing downtime and maintenance costs. A drain pipe 4 is connected to the bottom of the tank body 1. When the volume of the sulfuric acid solution needs to be reduced, the sulfuric acid solution is discharged from the drain pipe 4. A control valve 41 is provided above the drain pipe 4. The flow rate is adjusted by the control valve, which helps to accurately control the discharge speed and amount, thereby avoiding unnecessary waste or overflow.

[0019] A transparent cover 2 is hingedly installed on one side of the tank body 1. The cover made of transparent material allows the operator to observe the situation in the tank body 1 at any time, such as the state of the sulfuric acid solution and the direction of the fiber. A handle 24 is fixedly installed on the outer surface of the transparent cover 2, and a plurality of wire pressing pieces 22 are fixedly installed on the inner surface of the transparent cover 2. The wire pressing pieces 22 can press the guide wire into the acid solution. In this embodiment, the wire pressing pieces 22 can be arranged in an arc shape or a U shape, and wire guide openings 23 are fixedly installed on both sides of the inner surface of the transparent cover 2, which are used to guide the fibers or yarns through the acid bath to ensure that they are evenly contacted with the sulfuric acid solution, thereby improving the processing quality and efficiency. A plurality of hoses 21 are opened through the tank body 1. These hoses 21 are channels for introducing or discharging sulfuric acid solution vapor gas or liquid, which help to maintain a stable working environment in the tank body 1 and ensure that the fibers or yarns pass smoothly. The plurality of hoses 21 and the plurality of wire pressing pieces 22 are evenly distributed.

[0020] It should be noted that sealing rubber rings are provided on the transparent cover 2 and the top surface of the tank body 1. When the transparent cover 2 and the tank body 1 are in a closed state, the sealing rubber rings are in close contact with each other to achieve a better sealing effect.

[0021] See also Figure 1 As shown, a control system for an acid bath plasticizing tank is provided, wherein the method mainly adjusts the concentration in advance by predicting temperature changes, balances the relationship between the concentration and the liquid level when adjusting the concentration, and introduces the relationship between the temperature and the liquid level for optimization when balancing the concentration and the liquid level, so as to ensure the stability and efficiency of the production process, and comprises a data collection unit 10, a data processing center 20 and an execution control unit 30; The data collection unit 10 is used to collect real-time data related to the sulfuric acid solution in the tank body 1, wherein the real-time data includes sulfuric acid solution data, sulfuric acid solution concentration data, liquid level data of the sulfuric acid solution in the tank body 1, and input power to the sulfuric acid solution heating system; The data processing center 20 is used to obtain the temperature change trend of the sulfuric acid solution according to the real-time data collected related to the sulfuric acid solution, adjust the concentration of the sulfuric acid solution according to the temperature change trend, and simultaneously adjust the balance between the concentration and the liquid level of the sulfuric acid solution, and introduce the relationship between the temperature and the liquid level for optimization when adjusting the balance between the concentration and the liquid level; the data processing center 20 includes a storage processing module 201, an analysis and prediction module 202 and an adjustment verification module 203; The data processing center 20 is provided with a controller 204 , and the operations of the analysis and prediction module 202 are executed in the controller 204 , and the controller 204 can verify the input parameters.

[0022] In the data processing center 20, the storage processing module 201 is used to store the collected real-time data related to the sulfuric acid solution and the historical data related to the sulfuric acid solution, and to pre-process the real-time data; The analysis and prediction module 202 is used to predict the temperature change trend of the sulfuric acid solution based on the data of the storage and processing module 201, and obtain the concentration adjustment value of the sulfuric acid solution according to the temperature change trend, and adjust the balance between the concentration and the liquid level of the sulfuric acid solution according to the concentration adjustment value. When the predicted liquid level is normal, the concentration adjustment value is transmitted to the adjustment verification module 203, and the concentration value is continued to be adjusted according to the result fed back by the adjustment verification module 203; it can predict the future temperature change trend, provide a basis for adjusting the concentration, automatically adjust the concentration and liquid level according to the prediction results, reduce the need for manual intervention, and improve production efficiency and quality by optimizing the balance between concentration and liquid level.

[0023] The analysis and prediction module 202 involves predicting the temperature change trend based on the data of the storage processing module 201, as follows: S1. Extract key features from the data in the storage processing module 201 and standardize the key features to the same scale; wherein the key features include the sliding window average of the time series data , the rate of change of temperature , Input power of heating system ; S2. Build LSTM model: The input dimension of the input layer is equal to the number of features. For example, if there are four features: sliding window average, temperature change rate, and heating system input power change, the input dimension is 3. The LSTM layer is used to capture long-term dependencies in time series data. The output dimension of the LSTM layer can be adjusted as needed. Usually, a smaller value can be selected to reduce the complexity of the model. The output layer has only one node, which is used to predict the temperature value of the next time step. Internal state of LSTM cell: ; in, is the cell state at the current time step; is the output of the forget gate; is the cell state at the previous time step; is the output of the input gate; is the candidate unit status; represents element-wise multiplication; Output of LSTM cell: ; in, is the hidden state of the current time step; is the output of the output gate; It is the hyperbolic tangent function, which is a commonly used activation function used to introduce nonlinear characteristics in neural networks; is obtained by converting the cell state at the current time step After passing through the tanh function, it is then compared with the output of the output gate It is obtained by element-by-element multiplication ∘. The role of the tanh function here is to convert the unit state Map to The output gate then determines which information should be passed to the next time step based on the output of the output gate. ; ; ; in, is the Sigmoid activation function; is the weight matrix of the forget gate; is the cell state at the previous time step; is the input feature vector; ; is the bias term of the forget gate; is the weight matrix of the input gate; is the bias term of the input gate; is the weight matrix of the output gate; is the bias term of the output gate; ; in, is the weight matrix of the candidate unit; is the bias term of the candidate unit; This is done by adding the cell state from the previous time step and the input features of the current time step Through a linear transformation and the bias term After that, go through The function obtained. The function here is to map the result of the linear transformation to interval, thereby generating candidate cell states; ; in, The predicted sulfuric acid solution at time Temperature value at the moment; is the weight matrix from the hidden state to the output layer; is the bias term of the output layer.

[0024] The analysis and prediction module 202 involves obtaining a concentration adjustment value according to the temperature change trend, as follows: Temperature affects the solubility of the solute. The solubility of some substances increases with increasing temperature, while that of others decreases. Therefore, changes in temperature may affect the concentration of the sulfuric acid solution, and it is necessary to compensate for this change by adjusting the amount of raw materials added. For the sulfuric acid solution in the plasticizing tank, if the temperature change affects the solubility of the solute, then it is necessary to adjust the amount of raw materials added to compensate for this change. It is assumed that the solubility of the solute in the sulfuric acid solution in this embodiment increases with increasing temperature; ; in, For sulfuric acid solution at temperature Solubility at ; is the sulfuric acid solution at the reference temperature Solubility under is the temperature coefficient, which takes a positive value if the solubility increases with increasing temperature, and a negative value otherwise; is the current temperature of sulfuric acid solution; is the reference temperature of sulfuric acid solution; In this embodiment, the total volume in the plasticizing tank is Relatively constant, and the solvent volume is also relatively unchanged, then the concentration of the solute in the sulfuric acid solution It can be expressed as the mass of the solute Divide by the solvent volume : To maintain the concentration of solute in sulfuric acid solution At a set point , the mass of the solute needs to be adjusted according to the change in temperature Specifically, when temperature changes cause solubility changes, in order to maintain concentration No change, need to adjust the amount of solute added .

[0025] ; in, is the mass of the solute in the sulfuric acid solution; The concentration of sulfuric acid solution to be maintained; is the volume of the solvent; ; in, For the temperature The mass of the solute in the sulfuric acid solution below; In order to maintain the concentration of the solution The amount of solute added needs to be adjusted according to the temperature change. ; ; in, is the change in solute mass; if , that is, the mass of the solute increases, then it is necessary to add diluent to the sulfuric acid solution; if , that is, the mass of the solute decreases, so it is necessary to add solute to the sulfuric acid solution; The final mass of the solute Meeting the set concentration requirements means: ; is the volume of tank 1, is the molar mass of the solute.

[0026] Furthermore, the analysis and prediction module 202 involves adjusting the balance between the concentration and the liquid level according to the concentration adjustment value, because adding solute and diluent to the sulfuric acid solution will increase the volume of the sulfuric acid solution, and the liquid level will also increase as the volume of the sulfuric acid solution increases, as shown in detail below: ; in, To increase the volume of sulfuric acid solution after the solute; is the density of sulfuric acid solution; ; in, is the height increased by the sulfuric acid solution; is the bottom area of ​​the rectangular parallelepiped above the tank body 1; in this embodiment, the increase and decrease of the sulfuric acid solution are both carried out in the rectangular parallelepiped above the tank body 1; ; in, is the liquid level value of sulfuric acid solution; is the original height of sulfuric acid solution; if , is the maximum safe sulfuric acid solution height in the container, then the volume of sulfuric acid solution in the tank (1) is reduced before adjusting the concentration. ; in, is the volume of the sulfuric acid solution that needs to be reduced; the sulfuric acid solution that needs to be reduced is discharged through the drain pipe 4; Since the increase in temperature will increase the evaporation rate of sulfuric acid solution, especially in an open system, this may cause the liquid level of sulfuric acid solution to drop. In order to compensate for the evaporation loss, the replenishment amount needs to be increased to maintain a stable liquid level. Therefore, when adjusting the balance between concentration and liquid level, the relationship between temperature and liquid level is introduced for optimization, specifically: ; in, is the evaporation rate of sulfuric acid solution; is a proportionality constant that depends on the properties of the sulfuric acid solution and the geometry of the system; For the temperature The saturated vapor pressure under the condition of , the saturated vapor pressure changes with temperature, and can be obtained through empirical formula or table; is the actual vapor pressure, obtained from experimental data or estimated using a theoretical model; Once the evaporation rate , we can calculate the volume of sulfuric acid solution evaporated per unit time. Assuming that evaporation occurs in the rectangular part above the tank 1, its bottom area is , then the volume evaporated per unit time is: ; in, is the volume of sulfuric acid solution evaporated per unit time; is the time interval; but: ; in, The height to which the sulfuric acid solution is lowered by temperature; ; in, is the optimized liquid level value; if , then reduce the volume of sulfuric acid solution in tank 1 before adjusting the concentration.

[0027] By considering the effect of temperature on the volume of sulfuric acid solution, changes in liquid level can be predicted more accurately, thereby avoiding unexpected overflows or shortages. Through precise control of the liquid level, the risk of equipment damage can be reduced, thereby reducing maintenance costs. The system can better adapt to changes in ambient temperature, improving its adaptability to different environmental conditions.

[0028] The adjustment verification module 203 is used to adjust the parameters in the controller 204 according to the concentration value transmitted by the analysis and prediction module 202, continuously monitor the liquid level value in the controller 204, and determine whether the liquid level exceeds the preset safety threshold. If the liquid level value continues to not exceed the preset safety threshold, the concentration adjustment value is transmitted to the execution control unit 30, otherwise, the judgment result is fed back to the analysis and prediction module 202; The execution control unit 30 is used to update the concentration adjustment value of the sulfuric acid solution in the tank body 1, and continuously observe the situation inside the tank body 1, and alarm if an abnormal situation occurs; abnormal situations include the temperature of the sulfuric acid solution exceeding its safety threshold, the level of the sulfuric acid solution exceeding its safety threshold, and the concentration of the sulfuric acid solution exceeding its safety threshold. As long as one of these situations occurs, an alarm is issued. The execution control unit 30 is not only responsible for executing the concentration adjustment, but also responsible for monitoring the situation inside the tank body to ensure the safety and stability of the production process. Through continuous monitoring and timely response, potential problems can be effectively avoided and production efficiency and product quality can be improved.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A control system for an acid bath plasticizing tank, characterized in that: include: A data collection unit (10): used to collect real-time data related to the sulfuric acid solution in the tank (1), wherein the real-time data includes sulfuric acid solution data, sulfuric acid solution concentration data, liquid level data of the sulfuric acid solution in the tank (1), and input power to the sulfuric acid solution heating system; Data processing center (20): used to obtain a temperature variation trend of the sulfuric acid solution according to the collected real-time data related to the sulfuric acid solution, obtain a concentration adjustment value of the sulfuric acid solution according to the temperature variation trend, and simultaneously adjust the balance between the concentration and the liquid level of the sulfuric acid solution, and introduce the relationship between the temperature and the liquid level for optimization when adjusting the balance between the concentration and the liquid level; The data processing center (20) includes a storage processing module (201), an analysis and prediction module (202), and an adjustment and verification module (203); An execution control unit (30) is used to update the concentration adjustment value of the sulfuric acid solution in the tank body (1), and continuously observe the situation inside the tank body (1), and to generate an alarm if an abnormal situation occurs.

2. The control system of the acid bath plasticizing tank according to claim 1, characterized in that: The data processing center (20) further comprises a controller (204), the operation of the analysis and prediction module (202) is executed in the controller (204), and the controller (204) is capable of verifying input parameters.

3. The control system of the acid bath plasticizing tank according to claim 2, characterized in that: In the data processing center (20), the storage processing module (201) is used to store the collected real-time data related to the sulfuric acid solution and the historical data related to the sulfuric acid solution, and to pre-process the real-time data; The analysis and prediction module (202) is used to predict the change trend of the temperature of the sulfuric acid solution according to the data of the storage and processing module (201), and obtain the concentration adjustment value of the sulfuric acid solution according to the temperature change trend, and adjust the balance between the concentration and the liquid level of the sulfuric acid solution according to the concentration adjustment value. When the predicted liquid level is normal, the concentration adjustment value is transmitted to the adjustment verification module (203), and the concentration value is continued to be adjusted according to the result fed back by the adjustment verification module (203); The adjustment verification module (203) is used to adjust the parameters in the controller (204) according to the concentration value transmitted by the analysis and prediction module (202), continuously monitor the liquid level value in the controller (204), and determine whether the liquid level exceeds a preset safety threshold. If the liquid level value continues to not exceed the preset safety threshold, the concentration adjustment value is transmitted to the execution control unit (30); otherwise, the judgment result is fed back to the analysis and prediction module (202).

4. The control system of the acid bath plasticizing tank according to claim 3, characterized in that: The analysis and prediction module (202) involves predicting the change trend of the temperature of the sulfuric acid solution based on the data of the storage and processing module (201), as follows: S1. Extract key features from the data in the storage processing module (201) and standardize the key features to the same scale; wherein the key features include the sliding window average value of the time series data , the rate of change of temperature , Input power of heating system ; S2. Build LSTM model: Internal state of LSTM cell: ； in, is the cell state at the current time step; is the output of the forget gate; is the cell state at the previous time step; is the output of the input gate; is the candidate unit status; represents element-wise multiplication; Output of LSTM cell: ； in, is the hidden state of the current time step; is the output of the output gate; is the hyperbolic tangent function; ； ； ； in, is the Sigmoid activation function; is the weight matrix of the forget gate; is the cell state at the previous time step; is the input feature vector; ; is the bias term of the forget gate; is the weight matrix of the input gate; is the bias term of the input gate; is the weight matrix of the output gate; is the bias term of the output gate; ； in, is the weight matrix of the candidate unit; is the bias term of the candidate unit; ； in, The predicted sulfuric acid solution at time Temperature value at the moment; is the weight matrix from the hidden state to the output layer; is the bias term of the output layer.

5. The control system of the acid bath plasticizing tank according to claim 4, characterized in that: The analysis and prediction module (202) involves obtaining the sulfuric acid solution concentration adjustment value according to the temperature change trend, which is specifically as follows: ； in, For sulfuric acid solution at temperature Solubility at ; For sulfuric acid solution at the reference temperature Solubility under is the temperature coefficient; is the current temperature of sulfuric acid solution; is the reference temperature of sulfuric acid solution; ； in, is the mass of the solute in the sulfuric acid solution; The concentration of sulfuric acid solution to be maintained; is the volume of the solute; ； in, For the temperature The mass of the solute in the sulfuric acid solution below; ； in, is the change in solute mass; if , that is, the mass of the solute increases, then it is necessary to add diluent to the sulfuric acid solution; if , that is, the mass of the solute decreases, so it is necessary to add solute to the sulfuric acid solution; The final mass of the solute Meeting the set concentration requirements means: ; is the volume of the tank (1), is the molar mass of the solute.

6. The control system of the acid bath plasticizing tank according to claim 5, characterized in that: The analysis and prediction module (202) involves adjusting the balance between the concentration and the level of the sulfuric acid solution according to the concentration adjustment value, as follows: ； in, To increase the volume of sulfuric acid solution after the solute; is the density of sulfuric acid solution; ； in, is the height increased by the sulfuric acid solution; is the bottom area of ​​the cuboid above the trough (1); ； in, is the liquid level value of sulfuric acid solution; is the original height of sulfuric acid solution; if , then reduce the volume of sulfuric acid solution in the tank (1) before adjusting the concentration. is the maximum safe liquid height of the container; ； in, is the volume of sulfuric acid solution that needs to be reduced.

7. The control system of the acid bath plasticizing tank according to claim 6, characterized in that: When adjusting the balance between the concentration and the liquid level, the relationship between the temperature and the liquid level is introduced for optimization, specifically: ； in, is the evaporation rate of sulfuric acid solution; is the proportionality constant; For the temperature Saturated vapor pressure under is the actual vapor pressure; ； in, is the volume of sulfuric acid solution evaporated per unit time; is the time interval; but: ； in, The height to which the sulfuric acid solution is lowered by temperature; ； in, is the optimized liquid level value; if , the volume of sulfuric acid solution in the tank (1) is reduced before adjusting the concentration.

8. The control system of the acid bath plasticizing tank according to claim 7, characterized in that: Abnormal conditions in the execution control unit (30) include the temperature of the sulfuric acid solution exceeding its safety threshold, the liquid level of the sulfuric acid solution exceeding its safety threshold, and the concentration of the sulfuric acid solution exceeding its safety threshold. As long as any one of these conditions occurs, an alarm is triggered.

9. An acid bath plasticizing tank, used for a control system of an acid bath plasticizing tank as claimed in any one of claims 1 to 8, characterized in that: The invention comprises a tank body (1), wherein a temperature sensor, a concentration sensor and a liquid level sensor are installed on the inner wall of the tank body (1), wherein the temperature sensor is used to detect the temperature data of the sulfuric acid solution, the concentration sensor is used to detect the concentration data of the sulfuric acid solution, and the liquid level sensor is used to monitor the liquid level data of the sulfuric acid solution. A steam pipe (3) is provided near the bottom of the tank body (1), wherein the steam pipe (3) is connected to a sulfuric acid solution heating system, and the sulfuric acid solution heating system adjusts the temperature of the steam pipe (3) so as to control the temperature of the sulfuric acid solution. A drain pipe (4) is connected to the bottom of the tank body (1), and when the volume of the sulfuric acid solution needs to be reduced, the sulfuric acid solution is discharged from the drain pipe (4), and a control valve (41) is provided above the drain pipe (4).

10. The acid bath plasticizing tank according to claim 9, characterized in that: A transparent cover (2) is hingedly mounted on one side of the trough body (1); a handle (24) is fixedly mounted on the outer surface of the transparent cover (2); a plurality of wire pressing pieces (22) are fixedly mounted on the inner surface of the transparent cover (2); and wire guide openings (23) are fixedly mounted on both sides of the inner surface of the transparent cover (2); a plurality of hoses (21) are penetrated through the trough body (1); the hoses (21) are used to discharge the steam of the sulfuric acid solution; and the plurality of hoses (21) and the plurality of wire pressing pieces (22) are evenly distributed.

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