Recycling treatment and reuse analysis method and system for plasticizer-containing waste liquid

Abstract

The invention relates to the technical field of recovery management, in particular to a recovery treatment and reuse analysis method and system for plasticizer-containing waste liquid. The method comprises the following steps: installing a gas chromatograph-mass spectrometer or an inductively coupled plasma mass spectrometer at each position node of a plasticizer-containing waste liquid generation source, and performing real-time monitoring to generate a plasticizer-containing waste liquid component monitoring data set; placing the corresponding plasticizer-containing waste liquid into a distillation tower for distillation recovery, and performing real-time monitoring to obtain a waste liquid recovery reaction data set; the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set are transmitted to a data processing center in real time, fusion segmentation division processing and constraint recovery efficiency evaluation are carried out, and the plasticizer-containing recovery efficiency is obtained; and carrying out distillation recovery treatment and product reuse analysis according to the plasticizer-containing recovery efficiency to generate a plasticizer-containing waste liquid recovery and reuse decision. According to the method, the plasticizer-containing waste liquid can be efficiently recycled, and the resource utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of recycling management, and particularly to a method and system for recycling, treating, and reusing analysis of waste liquid containing plasticizers. Background Art

[0002] As a chemical additive commonly used in products such as plastics, rubbers, and coatings, plasticizers are widely used in the production process to improve the flexibility, ductility, and processability of materials. During use, plasticizers gradually migrate into the environment, especially into wastewater and waste liquid, leading to the accumulation of pollutants and posing potential hazards to the ecological environment and human health. Especially in the production, processing, and application of plasticizers, the content of plasticizers in the waste liquid is relatively high, and their recycling and treatment have become an environmental protection problem that needs to be solved urgently. At present, the recycling and treatment of waste liquid containing plasticizers mainly rely on traditional methods such as physical, chemical, and biological methods. Common treatment technologies include adsorption method, membrane separation method, chemical precipitation method, etc. Although these methods can remove plasticizers in the waste liquid to a certain extent, due to the wide variety of plasticizers and the large differences in their chemical structures and physical properties, the traditional treatment methods have poor effects when dealing with waste liquid mixed with multiple plasticizers, and the recycling and reuse of plasticizers in the waste liquid have not been fully realized. Summary of the Invention

[0003] Based on this, it is necessary for the present invention to provide a method and system for recycling, treating, and reusing analysis of waste liquid containing plasticizers to solve at least one of the above technical problems.

[0004] To achieve the above object, a method for recycling, treating, and reusing analysis of waste liquid containing plasticizers includes the following steps:

[0005] Step S1: Install a gas chromatography-mass spectrometry (GC-MS) instrument or an inductively coupled plasma mass spectrometry (ICP-MS) instrument at each position node at the source of waste liquid containing plasticizers, and use the GC-MS instrument or ICP-MS instrument to monitor in real time the types of plasticizers, concentration contents, and plasma concentrations of impurity components in the waste liquid containing plasticizers to generate a monitoring data set of the composition of the waste liquid containing plasticizers; place the corresponding waste liquid containing plasticizers into a distillation tower for distillation recovery, and use various sensors to monitor in real time the temperature, pressure, flow rate, and pH value during the distillation recovery process to obtain a waste liquid recovery reaction data set;

[0006] Step S2: Transmit the monitoring data set of the composition of the waste liquid containing plasticizers and the waste liquid recovery reaction data set to the data processing center in real time through a wireless transmission method, and use the data processing center to perform fusion and segmentation processing on the monitoring data set of the composition of the waste liquid containing plasticizers and the waste liquid recovery reaction data set to obtain a waste liquid recycling and treatment data set corresponding to each time segment;

[0007] Step S3: Design corresponding phthalate recovery distillation constraints through a distillation column, and evaluate the constraint recovery efficiency of the corresponding phthalate-containing waste liquid recovery dataset for each time segment based on the phthalate recovery distillation constraints to obtain the corresponding phthalate recovery efficiency under each distillation constraint condition; determine the corresponding phthalate recovery constraint maximization combination according to the phthalate recovery efficiency under each distillation constraint condition, and perform distillation recovery treatment on the corresponding phthalate-containing waste liquid according to the phthalate recovery constraint maximization combination to generate phthalate-containing waste liquid recovery products;

[0008] Step S4: Obtain the corresponding phthalate purity and waste liquid impurity content from the phthalate-containing waste liquid recovery products, and evaluate and account for the reuse of the phthalate-containing waste liquid recovery products based on the phthalate purity and waste liquid impurity content to obtain the product phthalate recovery reuse probability; perform product reuse analysis on the corresponding phthalate-containing waste liquid recovery products based on the product phthalate recovery reuse probability to generate a phthalate-containing waste liquid recovery reuse decision.

[0009] Further, step S1 includes the following steps:

[0010] Step S11: Install and debug and calibrate the corresponding gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry at each position node at the source of phthalate-containing waste liquid generation;

[0011] Step S12: Use gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry to monitor in real time the types of phthalates, concentration content, and plasma concentrations of impurity components in the phthalate-containing waste liquid to generate a phthalate-containing waste liquid composition monitoring dataset;

[0012] Step S13: Place the corresponding phthalate-containing waste liquid into the distillation column for simulation of distillation recovery operation to generate a phthalate-containing waste liquid distillation recovery process;

[0013] Step S14: Use various sensors to monitor in real time the process parameters of the phthalate-containing waste liquid distillation recovery process to monitor in real time the temperature, pressure, flow rate, and pH value corresponding to the distillation recovery process to obtain a waste liquid recovery reaction dataset.

[0014] Further, the types of phthalates described in step S12 are specifically phthalic acid esters and phosphate esters.

[0015] Further, step S2 includes the following steps:

[0016] Step S21: Transmit the phthalate-containing waste liquid composition monitoring dataset and the waste liquid recovery reaction dataset to the data processing center in real time through a wireless transmission method;

[0017] Step S22: Use the data processing center to merge and store the plasticizer-containing waste liquid composition monitoring data set and the waste liquid recovery reaction data set into the same data set, and perform data cleaning on it to remove environmental noise, equipment noise, outliers, and duplicate data in it, so as to obtain a high-quality data set for the recovery of plasticizer-containing waste liquid;

[0018] Step S23: Perform normalization processing on the high-quality data set for the recovery of plasticizer-containing waste liquid to unify plasticizer-containing components and recovery reaction parameters of different magnitudes to the same scale, so as to obtain a normalized data set for the recovery of plasticizer-containing waste liquid;

[0019] Step S24: Perform time series synchronization processing on the normalized data set for the recovery of plasticizer-containing waste liquid to obtain a large data set for the recovery of plasticizer-containing waste liquid within the same time series range;

[0020] Step S25: Perform time series segmentation processing on the large data set for the recovery of plasticizer-containing waste liquid within the same time series range to obtain corresponding data sets for the recovery of plasticizer-containing waste liquid under each time segment.

[0021] Further, step S3 includes the following steps:

[0022] Step S31: Design corresponding distillation constraints for plasticizer recovery through a distillation column, including distillation temperature constraints, extractant type constraints, and extractant dosage constraints;

[0023] Step S32: Evaluate the constrained recovery efficiency of the corresponding data sets for the recovery of plasticizer-containing waste liquid under each time segment based on the distillation constraints for plasticizer recovery to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition;

[0024] Step S33: Determine the maximum combination of plasticizer recovery constraints corresponding to the plasticizer recovery efficiency under each distillation constraint condition;

[0025] Step S34: Perform distillation recovery treatment on the corresponding plasticizer-containing waste liquid according to the maximum combination of plasticizer recovery constraints to generate a recovery product of plasticizer-containing waste liquid.

[0026] Further, step S32 includes the following steps:

[0027] Step S321: Determine the corresponding maximum limit distillation temperature and minimum limit distillation temperature according to the distillation temperature constraint;

[0028] Step S322: Determine the corresponding extraction reaction factor for plasticizer recovery according to the extractant type constraint;

[0029] Step S323: Determine the corresponding maximum amount and minimum amount of plasticizer-containing recycled extraction according to the constraint of the extractant dosage;

[0030] Step S324: Based on the maximum restricted distillation temperature, minimum restricted distillation temperature, plasticizer-containing recycled extraction reaction factor, maximum amount of plasticizer-containing recycled extraction, and minimum amount of plasticizer-containing recycled extraction, use the distillation recovery efficiency calculation formula to evaluate the constrained recovery efficiency of the plasticizer-containing waste liquid recovery treatment dataset for each time segment, so as to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition.

[0031] Further, the distillation recovery efficiency calculation formula described in Step S324 is specifically:

[0032]

[0033] In the formula, ε d is the plasticizer recovery efficiency, T min is the minimum restricted distillation temperature, T max is the maximum restricted distillation temperature, M min is the minimum amount of plasticizer-containing recycled extraction, M max is the maximum amount of plasticizer-containing recycled extraction, T is the distillation temperature change parameter, m is the extractant dosage change parameter, D e (T) is the reaction intensity between the plasticizer and the extractant at the distillation temperature T, α 2 is the distillation temperature control influence parameter, T opt is the optimal operating temperature for distillation recovery, β 2 is the distillation temperature inhibition parameter, ρ is the plasticizer-containing recycled extraction reaction factor, is the correction coefficient of the plasticizer recovery efficiency.

[0034] Further, Step S4 includes the following steps:

[0035] Step S41: Obtain the corresponding plasticizer purity and waste liquid impurity content from the plasticizer-containing waste liquid recovery product;

[0036] Step S42: Obtain the corresponding viscosity of the plasticizer product and the boiling point of the plasticizer product from the plasticizer-containing waste liquid recovery product;

[0037] Step S43: Based on the plasticizer purity, waste liquid impurity content, viscosity of the plasticizer product, and boiling point of the plasticizer product, use the recovery product reuse evaluation calculation formula to evaluate and calculate the reuse of the plasticizer-containing waste liquid recovery product, so as to obtain the product plasticizer recovery reuse probability;

[0038] Step S44: Based on the recycling probability of the product plasticizer, conduct product reuse analysis on the corresponding waste liquid recovery product containing plasticizer. If the recycling probability of the product plasticizer reaches over 95%, it is recommended to reuse the waste liquid recovery product containing plasticizer; otherwise, it is recommended to further recover and purify it to generate a decision on the recycling and reuse of the waste liquid containing plasticizer.

[0039] Further, the specific calculation formula for the recycling evaluation of the recovery product in step S43 is as follows:

[0040]

[0041] In the formula, P r is the recycling probability of the product plasticizer, C p is the purity of the plasticizer, x is the change parameter of the corresponding plasticizer concentration in the waste liquid recovery product containing plasticizer, x 0 is the initial concentration of the plasticizer, α 1 is the weight coefficient of the plasticizer concentration change, C i is the impurity content of the waste liquid, β 1 is the weight coefficient of the impurity content, η is the viscosity of the plasticizer product, T b is the boiling point of the plasticizer product, and ξ is the correction coefficient of the recycling probability of the product plasticizer.

[0042] Further, the present invention also provides a recovery treatment and reuse analysis system for waste liquid containing plasticizer, which is used to execute the recovery treatment and reuse analysis method for waste liquid containing plasticizer as described above. The recovery treatment and reuse analysis system for waste liquid containing plasticizer includes:

[0043] A real-time monitoring module for the waste liquid treatment process, which is used to install a gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry at each position node at the source of the waste liquid containing plasticizer, and use the gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry to monitor the types, concentration contents of the corresponding plasticizer, and plasma concentrations of impurity components in the waste liquid containing plasticizer in real time to generate a monitoring data set of the composition of the waste liquid containing plasticizer; place the corresponding waste liquid containing plasticizer into a distillation tower for distillation recovery, and use various sensors to monitor the temperature, pressure, flow rate, and pH value during the distillation recovery process in real time, so as to obtain a waste liquid recovery reaction data set;

[0044] A waste liquid recovery data preprocessing module, which is used to transmit the monitoring data set of the composition of the waste liquid containing plasticizer and the waste liquid recovery reaction data set to the data processing center in real time through a wireless transmission method, and use the data processing center to perform fusion and segmentation processing on the monitoring data set of the composition of the waste liquid containing plasticizer and the waste liquid recovery reaction data set, so as to obtain a waste liquid recovery treatment data set corresponding to each time segment;

[0045] The recycling constraint maximization processing module is used to design corresponding plasticizer-containing recycling distillation constraints through a distillation column, and evaluate the constraint recycling efficiency of the corresponding plasticizer-containing waste liquid recycling treatment dataset under each time segment based on the plasticizer-containing recycling distillation constraints, so as to obtain the corresponding plasticizer recycling efficiency under each distillation constraint condition; determine the corresponding plasticizer-containing recycling constraint maximization combination according to the corresponding plasticizer recycling efficiency under each distillation constraint condition, and perform distillation recycling treatment on the corresponding plasticizer-containing waste liquid according to the plasticizer-containing recycling constraint maximization combination to generate a plasticizer-containing waste liquid recycling product;

[0046] The recycled product reuse evaluation module is used to obtain the corresponding plasticizer purity and waste liquid impurity content through the plasticizer-containing waste liquid recycling product, and evaluate and calculate the reuse of the plasticizer-containing waste liquid recycling product based on the plasticizer purity and waste liquid impurity content, so as to obtain the product plasticizer recycling reuse probability; perform product reuse analysis on the corresponding plasticizer-containing waste liquid recycling product based on the product plasticizer recycling reuse probability to generate a plasticizer-containing waste liquid recycling reuse decision.

[0047] The beneficial effects of the present invention:

[0048] 1. The recovery, treatment and reuse analysis method for waste liquid containing plasticizer proposed by the present invention, compared with the prior art, the beneficial effect of this application is that by installing a gas chromatography-mass spectrometry (GC-MS) or inductively coupled plasma mass spectrometry (ICP-MS) at each position node at the source of the waste liquid containing plasticizer, real-time monitoring of the waste liquid composition is achieved. These instruments can effectively detect the types, concentrations and impurity components of plasticizers in the waste liquid, generating accurate composition data sets. Plasticizers usually consist of multiple different chemical components. Through high-precision instruments such as GC-MS and ICP-MS, the chemical changes in the waste liquid can be captured in real time, thus providing reliable real-time data for subsequent treatment. In the distillation recovery stage, by installing various sensors to monitor important parameters such as temperature, pressure, flow rate and pH value, real-time collection of waste liquid recovery reaction data is carried out. The changes in temperature, pressure and flow rate directly affect the efficiency of the distillation recovery process, while the change in pH value may reflect the chemical reaction state in the waste liquid. By monitoring these parameters, the operating conditions can be adjusted in a timely manner during the waste liquid recovery process to ensure the maximization of the recovery effect. The key to this step is to achieve comprehensive control of the plasticizer waste liquid composition and the recovery process through accurate real-time data monitoring. Secondly, by transmitting the plasticizer waste liquid composition monitoring data set and the waste liquid recovery reaction data set to the data processing center in real time through a wireless transmission method and performing data fusion processing, this real-time transmission mechanism can synchronously send various data in the waste liquid recovery process (such as plasticizer types, concentrations, temperature and pressure during the recovery process, etc.) to the data processing center, providing comprehensive information support for subsequent data analysis. The use of wireless transmission greatly improves the efficiency of data collection and transmission, reduces data delay and transmission errors caused by traditional wired transmission, and through data fusion and segmented division processing, a data set with time series characteristics is formed, facilitating the analysis of the waste liquid recovery effect in different time periods. Data fusion and time segmentation processing enable the processing center to analyze the dynamic changes of waste liquid recovery from multiple perspectives, providing a reliable basis for accurately evaluating the recovery efficiency and optimizing the treatment conditions, enhancing the monitorability and adjustability of the waste liquid recovery process, and helping to improve the response speed and processing efficiency of the recovery system.Then, by applying the recovery distillation constraint conditions based on the design of the distillation column and combining with the previously provided processed data, the waste liquid recovery efficiency is evaluated. The distillation constraint conditions include physical parameters such as temperature, pressure, and flow rate, which directly affect the recovery efficiency of the plasticizer. According to the recovery data at different time periods during the recovery process, the data processing center can quantitatively evaluate the waste liquid recovery efficiency to ensure the effectiveness of the distillation recovery process. When evaluating the recovery efficiency, by considering various possible distillation constraint conditions, the optimization of the recovery efficiency is achieved. By maximizing the combination of distillation constraint conditions, the most suitable operating parameter configuration can be found to achieve the efficient recovery of the plasticizer in the waste liquid. The key to this step lies in the fine control of the distillation process and the optimization of the constraint conditions, which significantly improves the yield and efficiency of waste liquid recovery. Finally, by analyzing the plasticizer purity of the recovered product from the waste liquid containing plasticizer and the impurity content of the waste liquid, the reuse value of the recovered product is further evaluated. The purity of the plasticizer is the key factor determining its reuse possibility. The higher the purity, the better the reuse effect; while the impurity content in the waste liquid will affect the performance of the plasticizer. Therefore, sufficient monitoring and evaluation are required. Based on the plasticizer purity and the impurity content of the waste liquid, the data processing center can evaluate the reuse possibility of the recovered product and calculate the recovery reuse probability of the plasticizer. This evaluation will guide subsequent reuse decisions to help achieve the recycling of the plasticizer while ensuring product quality. By accurately evaluating the reuse value of the recovered product, it is possible to effectively determine when and how to put the recovered product into the next production process, thereby reducing the dependence on new resources. This not only improves the utilization rate of resources but also fully realizes the recovery and reuse of the plasticizer in the waste liquid.

[0049] 2. The recovery treatment and reuse analysis system for waste liquid containing plasticizer proposed by the present invention is generally composed of a real-time monitoring module for the waste liquid treatment process, a preprocessing module for waste liquid recovery data, a maximization processing module for recovery constraints, and a reuse evaluation module for the recovered product, and can implement the recovery treatment and reuse analysis method for any waste liquid containing plasticizer described in the present invention. The operation between computer programs running on each module is used to implement the recovery treatment and reuse analysis method for waste liquid containing plasticizer. The internal structure of the system cooperates with each other, which can greatly reduce repetitive work and manpower input, and can quickly and effectively provide a more accurate and efficient recovery treatment and reuse analysis process for waste liquid containing plasticizer, thereby simplifying the operation process of the recovery treatment and reuse analysis system for waste liquid containing plasticizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Other features, objects, and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0051] Figure 1Schematic diagram of the step process for the recycling, treatment, and reuse analysis method of waste liquid containing plasticizer in the present invention;

[0052] Figure 2 is Figure 1 A detailed step process schematic diagram of step S1 in Specific embodiments

[0053] The technical method of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those skilled in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0054] In addition, the accompanying drawings are only schematic diagrams of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. The functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor methods and / or microcontroller methods.

[0055] It should be understood that although terms such as "first" and "second" may be used here to describe each unit, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, the first unit can be called the second unit, and similarly, the second unit can be called the first unit. The term "and / or" used here includes any and all combinations of one or more of the listed related items.

[0056] To achieve the above object, please refer to Figures 1 to 2 , the present invention provides a method for recycling, treating, and reusing analysis of waste liquid containing plasticizer, and the method includes the following steps:

[0057] Step S1: Install a gas chromatography-mass spectrometry (GC-MS) or inductively coupled plasma mass spectrometry (ICP-MS) at each position node at the source of the waste liquid containing plasticizer, and use the GC-MS or ICP-MS to monitor in real time the types of plasticizers, concentration contents, and plasma concentrations of impurity components in the waste liquid containing plasticizer to generate a waste liquid component monitoring data set containing plasticizer; Place the corresponding waste liquid containing plasticizer into a distillation tower for distillation recovery, and use various sensors to monitor in real time the temperature, pressure, flow rate, and pH value during the distillation recovery process to obtain a waste liquid recovery reaction data set;

[0058] Step S2: Transmit the plasticizer-containing waste liquid composition monitoring data set and the waste liquid recovery reaction data set to the data processing center in real time through wireless transmission, and use the data processing center to perform fusion segmentation processing on the plasticizer-containing waste liquid composition monitoring data set and the waste liquid recovery reaction data set to obtain the plasticizer-containing waste liquid recovery processing data set corresponding to each time segment;

[0059] Step S3: Design corresponding plasticizer recovery distillation constraints through the distillation column, and evaluate the constraint recovery efficiency of the plasticizer-containing waste liquid recovery processing data set corresponding to each time segment based on the plasticizer recovery distillation constraints to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition; Determine the maximum combination of plasticizer recovery constraints corresponding to the plasticizer recovery efficiency corresponding to each distillation constraint condition, and perform distillation recovery processing on the corresponding plasticizer-containing waste liquid according to the maximum combination of plasticizer recovery constraints to generate a plasticizer-containing waste liquid recovery product;

[0060] Step S4: Obtain the corresponding plasticizer purity and waste liquid impurity content from the plasticizer-containing waste liquid recovery product, and perform reuse evaluation and accounting on the plasticizer-containing waste liquid recovery product based on the plasticizer purity and waste liquid impurity content to obtain the product plasticizer recovery reuse probability; Perform product reuse analysis on the corresponding plasticizer-containing waste liquid recovery product based on the product plasticizer recovery reuse probability to generate a plasticizer-containing waste liquid recovery reuse decision.

[0061] In the embodiment of the present invention, please refer to Figure 1 As shown, it is a step flow schematic diagram of the method for recycling treatment and reuse analysis of plasticizer-containing waste liquid of the present invention. In this example, the method for recycling treatment and reuse analysis of plasticizer-containing waste liquid includes the following steps:

[0062] Step S1: Install a gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry at each position node at the source of the plasticizer-containing waste liquid, and use the gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry to monitor the types, concentration contents of plasticizers and plasma concentrations of impurity components in the plasticizer-containing waste liquid in real time to generate a plasticizer-containing waste liquid composition monitoring data set; Place the corresponding plasticizer-containing waste liquid into the distillation column for distillation recovery, and use various sensors to monitor the temperature, pressure, flow rate and pH value corresponding to the distillation recovery process in real time to obtain a waste liquid recovery reaction data set;

[0063] In the embodiments of the present invention, at each position node of the source of waste liquid containing plasticizer, by installing a gas chromatography-mass spectrometry (GC-MS) or inductively coupled plasma mass spectrometry (ICP-MS), the waste liquid is monitored in real time. These instruments can accurately detect the types, concentrations and impurity contents of plasticizers in the waste liquid. In the actual operation process, the waste liquid sample is vaporized, separated and mass spectrometrically analyzed by the gas chromatography-mass spectrometry to accurately obtain the chemical composition and concentration of the plasticizer. At the same time, the inductively coupled plasma mass spectrometry can be used to analyze the metal impurities in the waste liquid. The monitoring data is collected and recorded through real-time connection with the relevant control system to generate a monitoring data set of the composition of the waste liquid containing plasticizer. Next, the collected waste liquid containing plasticizer is introduced into a distillation column for distillation and recovery treatment. The distillation column is equipped with a variety of sensors to monitor important parameters such as temperature, pressure, flow rate and pH value during the distillation process in real time. These real-time data reflect the distillation process of the waste liquid, and finally a waste liquid recovery reaction data set is obtained.

[0064] Step S2: Transmit the monitoring data set of the composition of the waste liquid containing plasticizer and the waste liquid recovery reaction data set to the data processing center in real time through a wireless transmission method, and use the data processing center to perform fusion segmentation processing on the monitoring data set of the composition of the waste liquid containing plasticizer and the waste liquid recovery reaction data set to obtain the waste liquid recovery treatment data set corresponding to each time segment.

[0065] In the embodiments of the present invention, the previously obtained monitoring data set of the composition of the waste liquid containing plasticizer and the waste liquid recovery reaction data set are transmitted to the data processing center through a wireless transmission system. The wireless transmission system can upload the data from the on-site equipment to the central server in real time through Wi-Fi, Bluetooth or 5G network. The data processing center receives and performs fusion processing through an efficient data processing platform, combines and segments the composition monitoring data set and the reaction data set. During this process, the data processing system divides each segment of data according to the time stamp, and each time period corresponds to a set of monitoring data. These data will be further cleaned and corrected to ensure their accuracy, and a time-segmented waste liquid recovery treatment data set is generated. Each segment of data represents the key operation parameters and the change of waste liquid composition during the distillation and recovery process, and finally the waste liquid recovery treatment data set corresponding to each time segment is obtained.

[0066] Step S3: Design corresponding distillation constraints for the plasticizer-containing waste liquid recovery through a distillation column, and evaluate the constraint recovery efficiency of the plasticizer-containing waste liquid recovery treatment dataset corresponding to each time segment based on the distillation constraints for the plasticizer-containing waste liquid recovery, so as to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition; determine the maximum combination of the plasticizer-containing recovery constraints corresponding to the plasticizer recovery efficiency under each distillation constraint condition, and perform distillation recovery treatment on the corresponding plasticizer-containing waste liquid according to the maximum combination of the plasticizer-containing recovery constraints to generate a plasticizer-containing waste liquid recovery product;

[0067] In the embodiment of the present invention, by determining the constraint conditions of the plasticizer-containing waste liquid recovery distillation process based on the designed distillation column structure and recovery requirements, the design of the distillation column includes constraint conditions of process parameters such as distillation temperature, extractant type, and extractant dosage. These parameters are crucial for the recovery efficiency of the plasticizer. The processing data obtained in each time period through experiments is combined with the above-mentioned recovery distillation constraints for recovery efficiency evaluation. The specific evaluation method includes calculating the correlation between the plasticizer recovery rate and the change in the waste liquid composition in each time period, and analyzing the recovery efficiency according to the recovery constraint conditions, so as to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition. These data are used to evaluate and determine the optimal recovery strategy under different constraint conditions. By comparing the efficiencies of different recovery constraint combinations, the optimal maximum combination of the recovery constraints is selected. This combination will be applied to the actual waste liquid recovery treatment process to ensure the maximum recovery efficiency of the plasticizer, so as to obtain an efficient and economical distillation recovery treatment plan, and finally generate a plasticizer-containing waste liquid recovery product.

[0068] Step S4: Obtain the corresponding plasticizer purity and waste liquid impurity content from the plasticizer-containing waste liquid recovery product, and perform reuse evaluation accounting on the plasticizer-containing waste liquid recovery product based on the plasticizer purity and waste liquid impurity content to obtain the product plasticizer recovery reuse probability; perform product reuse analysis on the corresponding plasticizer-containing waste liquid recovery product based on the product plasticizer recovery reuse probability to generate a plasticizer-containing waste liquid recovery reuse decision.

[0069] In an embodiment of the present invention, after obtaining the recovered product of the waste liquid containing a plasticizer, the purity of the plasticizer is detected and the impurity content in the waste liquid is analyzed. A gas chromatography-mass spectrometry (GC-MS) instrument or other analytical instruments are used to conduct detailed quality control on the recovered product, measure the purity of the plasticizer and the composition of the residual waste liquid impurities. The higher the purity of the plasticizer, the higher the recovery efficiency. The impurity content in the waste liquid affects the reuse value of the plasticizer and the quality of the product. Based on the measured purity of the plasticizer and the impurity content in the waste liquid, a reuse evaluation of the recovered product is carried out. This evaluation predicts the probability of reuse by establishing a recovery and reuse model and combining the actual properties of the product. This model analyzes the stability and performance of the recovered product under different usage scenarios through experimental data and theoretical calculations. According to the reuse probability of the product, a further reuse analysis of the waste liquid recovered product is carried out. This analysis can help determine whether the recovered product can be used again in production or whether further refining and purification treatments are required, and finally form a decision on the recovery and reuse of the waste liquid containing a plasticizer.

[0070] Further, step S1 includes the following steps:

[0071] Step S11: Install, debug, and calibrate the corresponding gas chromatography-mass spectrometry (GC-MS) instrument or inductively coupled plasma mass spectrometry (ICP-MS) instrument at each position node at the source of the waste liquid containing a plasticizer;

[0072] Step S12: Use the gas chromatography-mass spectrometry (GC-MS) instrument or inductively coupled plasma mass spectrometry (ICP-MS) instrument to monitor in real time the types, concentration contents of the corresponding plasticizers, and plasma concentrations of impurity components in the waste liquid containing a plasticizer to generate a monitoring data set of the composition of the waste liquid containing a plasticizer;

[0073] Step S13: Place the corresponding waste liquid containing a plasticizer into a distillation tower for a simulation of the distillation recovery operation to generate a distillation recovery process of the waste liquid containing a plasticizer;

[0074] Step S14: Use various sensors to monitor in real time the process parameters during the distillation recovery process of the waste liquid containing a plasticizer to monitor in real time the temperature, pressure, flow rate, and pH value corresponding to the distillation recovery process and obtain a waste liquid recovery reaction data set.

[0075] As an embodiment of the present invention, referring to Figure 2 shown, for Figure 1 the detailed step flow diagram of step S1 in

[0076] Step S11: Install, debug, and calibrate the corresponding gas chromatography-mass spectrometry (GC-MS) instrument or inductively coupled plasma mass spectrometry (ICP-MS) instrument at each position node at the source of the waste liquid containing a plasticizer;

[0077] In the embodiments of the present invention, by installing and debugging a gas chromatography-mass spectrometry (GC-MS) or an inductively coupled plasma mass spectrometry (ICP-MS) at each position node at the source of waste liquid generation, it is necessary to ensure that the equipment has high sensitivity, accuracy, and good real-time detection performance. First, at the key nodes of the waste liquid flow path, such as the waste liquid generation pipeline, the inlet and outlet of the storage container, etc., accurately install the GC-MS or ICP-MS instrument, and connect it through a suitable interface so that it can detect various plasticizer components in the waste liquid in real time. During the installation process, strictly follow the instrument operation manual for electrical connection, gas channel connection, etc. operations to ensure that the instrument is in a normal working state. The debugging process includes ensuring that the equipment can stably acquire waste liquid samples and perform analysis. The instrument needs to be debugged and calibrated to ensure that when detecting plasticizer chemical substances, its accuracy and sensitivity can meet the requirements of real-time monitoring. The calibration method of the instrument can be calibrated by comparing with reference substances to ensure the reliability of the equipment data.

[0078] Step S12: Use a gas chromatography-mass spectrometry or an inductively coupled plasma mass spectrometry to monitor in real time the types of plasticizers, concentration contents, and plasma concentrations of impurity components, etc. in the waste liquid containing plasticizers, so as to generate a monitoring data set of the components of the waste liquid containing plasticizers.

[0079] In the embodiments of the present invention, by using a gas chromatography-mass spectrometry (GC-MS) or an inductively coupled plasma mass spectrometry (ICP-MS) to monitor the waste liquid containing plasticizers in real time, collect the types of plasticizers, concentrations, and impurity components in the waste liquid. When using GC-MS, first inject the waste liquid sample into the chromatographic column through a suitable sampling device. The plasticizer components enter the chromatographic column with the gas flow for separation, and then the separated components are identified and quantified by mass spectrometry analysis to obtain data on the types and concentration contents of plasticizers. When using ICP-MS, the waste liquid sample is converted into a gas form through a vaporization device, and then excited and ionized by an inductively coupled plasma. The ionized sample enters the mass spectrometer for qualitative and quantitative analysis of elements and compounds. Through this process, the types of plasticizers are monitored in real time, mainly including phthalic acid esters, phosphate esters, etc., and at the same time, the concentrations and contents of impurity components are recorded, and finally a monitoring data set of the components of the waste liquid containing plasticizers is generated.

[0080] Step S13: Place the corresponding waste liquid containing plasticizers into a distillation tower for a simulation of distillation recovery operation to generate a distillation recovery process of the waste liquid containing plasticizers.

[0081] In an embodiment of the present invention, the operation simulation of distillation recovery is carried out by transferring the monitored waste liquid containing plasticizer to a distillation column. During the specific operation, first, a suitable type and configuration of the distillation column are selected according to the characteristics of the waste liquid components. The distillation column needs to have sufficient fractionation effect to separate different components in the waste liquid, especially the plasticizer. Multiple heaters, condensers and fractionation sections are arranged inside the distillation column. The heating system is started to heat the waste liquid to an appropriate distillation temperature, so that the plasticizer and other volatile components in the waste liquid evaporate and rise, are condensed into steam by the condenser at the top of the column, and then are converted into liquid through the condenser tube for collection. The entire distillation process needs to be controlled by an accurate temperature control system to ensure that the plasticizer can be effectively recovered, avoid thermal decomposition or loss, reduce energy consumption and resource waste, and finally generate the distillation recovery process of the waste liquid containing plasticizer.

[0082] Step S14: Real-time monitor the process parameters of the distillation recovery process of the waste liquid containing plasticizer through various sensors, so as to real-time monitor the temperature, pressure, flow rate and pH value corresponding to the distillation recovery process, and obtain the waste liquid recovery reaction data set.

[0083] In an embodiment of the present invention, during the distillation recovery process, real-time monitoring is carried out through various sensors. During the specific implementation, a temperature sensor, a pressure sensor, a flowmeter and a pH sensor are installed in the distillation column to obtain the key operation parameters during the distillation recovery process in real time. The temperature sensors should be distributed at different heights in the column to ensure that the temperatures of different distillation sections are accurately controlled and avoid the influence of too high or too low temperatures on the recovery effect. The pressure sensor is used to monitor the pressure change in the column to ensure that the pressure is within a safe range and avoid the situation of equipment damage caused by too high pressure. The flowmeter monitors the flow rates of the reflux liquid and the waste gas to ensure the flow balance during the distillation process and avoid insufficient or excessive reflux. The pH sensor is used to monitor the acidity and alkalinity of the waste liquid, especially the acid-base changes that occur to the plasticizer during the distillation process. Through the data collection of the above sensors, a waste liquid recovery reaction data set is generated in real time, and the operation parameters of the distillation process are finely adjusted to ensure the best recovery effect, and finally the waste liquid recovery reaction data set is obtained.

[0084] Further, the types of plasticizers described in step S12 are specifically phthalates and phosphates.

[0085] Further, step S2 includes the following steps:

[0086] Step S21: Transmit the waste liquid component monitoring data set containing plasticizer and the waste liquid recovery reaction data set to the data processing center in real time through a wireless transmission method;

[0087] In the embodiments of the present invention, the composition of the waste liquid containing plasticizer and the waste liquid recovery reaction data are monitored in real time by a sensor device, and the data is sent to a remote data processing center through a wireless transmission system (such as Wi-Fi, Zigbee, Bluetooth, 5G, etc.). The data collected by the sensor includes physicochemical parameters such as the pH value, solubility, plasticizer concentration, temperature, and reaction rate of the waste liquid, and the data is packaged and encrypted through a wireless module to ensure the security and confidentiality during the data transmission process. The wireless transmission system needs to ensure low latency and high reliability to achieve real-time transmission and prevent data loss or delay. After the wireless transmission is completed, the data is stored in the cloud server or local database of the data processing center.

[0088] Step S22: Use the data processing center to merge and store the waste liquid containing plasticizer composition monitoring data set and the waste liquid recovery reaction data set into the same data set, and perform data cleaning on it to remove environmental noise, equipment noise, outliers, and duplicate data, so as to obtain a high-quality data set for waste liquid containing plasticizer recovery.

[0089] In the embodiments of the present invention, after receiving the transmitted data, the data processing center first merges the waste liquid containing plasticizer composition monitoring data set and the waste liquid recovery reaction data set into a complete data set through a unified database management system. To ensure the accuracy and integrity of the data, data cleaning technology is used for processing. The identification and elimination of environmental noise and equipment noise are completed through a preset filter. The filter removes abnormal fluctuation values according to the standard fluctuation range and sampling frequency of the parameters. The detection of outliers uses the Z-score or IQR (interquartile range) method to eliminate abnormal data points exceeding the set threshold. To remove duplicate data, a hash algorithm or database deduplication operation can be used to ensure the uniqueness of each piece of data. After this series of cleaning operations, the obtained high-quality data set has higher reliability, and finally a high-quality data set for waste liquid containing plasticizer recovery is obtained.

[0090] Step S23: Perform normalization processing on the high-quality data set for waste liquid containing plasticizer recovery to unify the plasticizer-containing components and recovery reaction parameters of different magnitudes to the same scale, so as to obtain a normalized data set for waste liquid containing plasticizer recovery.

[0091] In an embodiment of the present invention, in order to eliminate the influence of different parameter magnitude differences on the subsequent analysis model, a normalization method is used to process the high-quality data set. Commonly used normalization methods include Min-Max Scaling and Z-score normalization. In specific operations, the data value of each variable is converted into a value between 0 and 1 through a formula. The formula is: Normalized value = X - min(X) / max(X) - min(X), where X represents the original data value, and min(X) and max(X) are the minimum and maximum values of the variable respectively. The data set after normalization ensures that the scales of all parameters are consistent, so that they will no longer produce deviations due to different magnitudes in the subsequent model training and prediction processes, and finally a normalized data set for the recovery of waste liquid containing plasticizer is obtained.

[0092] Step S24: Perform time series synchronization processing on the normalized data set for the recovery of waste liquid containing plasticizer to obtain a large data set for the recovery of waste liquid containing plasticizer within the same time series range;

[0093] In an embodiment of the present invention, by aligning the timestamps of each data source, it is ensured that different sensor data can be compared and analyzed under a unified time dimension. First, according to the sampling frequencies and timestamps of each sensor, an interpolation algorithm (such as linear interpolation or spline interpolation) is used to synchronize the data with different time steps. If data is missing at some time points, the nearest neighbor or interpolation method can be used to fill in the missing values. After synchronization, the parameters measured by various sensors will be arranged under a unified time step, and the time ranges of all data are aligned within the same time series segment, ensuring the consistency and comparability of the data in subsequent analyses. Finally, a large data set for the recovery of waste liquid containing plasticizer within the same time series range is obtained.

[0094] Step S25: Perform time series segmentation processing on the large data set for the recovery of waste liquid containing plasticizer within the same time series range to obtain corresponding data sets for the recovery of waste liquid containing plasticizer under each time segment.

[0095] In an embodiment of the present invention, by dividing the synchronized time-series dataset by time period, first, according to the requirements of the processing target, such as reaction rate change, temperature change, etc., an appropriate time window is selected. For example, it can be set that each hour or each minute is a time period, and the sliding window algorithm is used to segment the time-series data. For each time period, the data processing center extracts the relevant data within that time period and stores it as an independent sub-dataset, which is convenient for subsequent model training and analysis. The divided dataset can help analysts discover the laws, trends, and changes in the process of plasticizer waste liquid recovery in different time periods. The dataset is not only processed in time-series synchronization but also can conduct in-depth personalized analysis for different recovery processing stages, and finally obtain the plasticizer-containing waste liquid recovery processing dataset corresponding to each time segment.

[0096] Further, step S3 includes the following steps:

[0097] Step S31: Design corresponding plasticizer-containing recovery distillation constraints through the distillation column, including distillation temperature constraints, extractant type constraints, and extractant dosage constraints;

[0098] In an embodiment of the present invention, in the process of designing the plasticizer-containing recovery distillation, first, the operating parameters of the distillation column need to be strictly designed and constrained. The temperature setting of the distillation column is one of the key factors. The temperature needs to be adjusted according to the boiling point and volatility characteristics of the plasticizer. For example, if the boiling point of the plasticizer is relatively low, the operating temperature of the distillation column can be set slightly lower than the boiling point of the plasticizer to avoid its premature volatilization and ensure the effective recovery of the plasticizer. At the same time, it is crucial to select a suitable extractant. A chemical substance that can efficiently dissolve the plasticizer must be selected, such as a specific organic solvent or a composite extractant, to ensure its good selectivity during the distillation process. The dosage of the extractant is also a parameter that needs to be constrained. It should be ensured that the dosage is sufficient and not excessive, resulting in unstable material flow inside the distillation column. The selection and dosage of the extractant will directly affect the extraction efficiency during the recovery process and the operating efficiency of the distillation column, and finally obtain the plasticizer-containing recovery distillation constraints, including distillation temperature constraints, extractant type constraints, and extractant dosage constraints.

[0099] Step S32: Based on the plasticizer-containing recovery distillation constraints, evaluate the constraint recovery efficiency of the plasticizer-containing waste liquid recovery processing dataset corresponding to each time segment to obtain the plasticizer-containing recovery efficiency corresponding to each distillation constraint condition;

[0100] In an embodiment of the present invention, when recovering the waste liquid containing plasticizer in each time period, it is necessary to evaluate the recovery efficiency in combination with distillation constraint conditions (such as temperature, type of extractant, dosage, etc.). Through a real-time monitoring and data recording system, the recovery efficiency during the distillation process is tracked, and the influence of each distillation constraint condition on the recovery effect is evaluated. For example, when the temperature is set to a relatively high value, the recovery efficiency of the plasticizer increases, but the energy consumption is also relatively large. Therefore, it is necessary to comprehensively consider the balance between efficiency and energy consumption. The data set for each time segment should include the temperature fluctuation in the distillation column, the change in the concentration of the extractant, the product recovery rate, etc. Through data analysis tools (such as regression analysis or machine learning models), the recovery efficiency under different constraint conditions is evaluated to find the optimal operating parameters, and finally the corresponding recovery efficiency of the waste liquid containing plasticizer under each distillation constraint condition is obtained.

[0101] Step S33: Determine the maximum combination of recovery constraints corresponding to the waste liquid containing plasticizer according to the recovery efficiency of the waste liquid containing plasticizer corresponding to each distillation constraint condition;

[0102] In an embodiment of the present invention, based on the recovery efficiency quantified under different distillation constraint conditions, the next step is to maximize the combination of the recovery efficiency. This process requires finding the optimal parameter combination under multiple constraint conditions (including the temperature range of the distillation column, type and dosage of the extractant, etc.). For example, through multiple experiments or simulation, the combination of different temperatures and extractant dosages is analyzed, and the combination that can most improve the recovery efficiency is selected. When determining the constraint combination for maximizing the recovery efficiency, the continuity of production and cost-effectiveness also need to be considered to avoid excessive energy consumption or excessive waste of raw materials, so as to ensure the economy and sustainability of the whole process based on the principle of maximizing the recovery efficiency, and finally obtain the maximum combination of recovery constraints for the waste liquid containing plasticizer.

[0103] Step S34: Perform distillation recovery treatment on the corresponding waste liquid containing plasticizer according to the maximum combination of recovery constraints for the waste liquid containing plasticizer to generate a recovery product of the waste liquid containing plasticizer.

[0104] In an embodiment of the present invention, by performing distillation recovery treatment on the waste liquid containing plasticizer according to the previously determined maximum combination of recovery constraints, at this time, the operating conditions in the distillation column (including temperature, pressure, flow rate, type and dosage of the extractant, etc.) will be adjusted according to the optimal combination. By adjusting the operating parameters of the distillation column, the efficient recovery of the plasticizer is ensured, and the interference of non-target substances is avoided. During this process, it is necessary to precisely control the operating conditions in the distillation column. For example, the distillation process is monitored through real-time temperature sensors and flow meters to ensure that the temperature, extractant concentration, etc. are stable within the preset range. The recovered waste liquid product will be cooled by a condenser, and the recovered plasticizer can be reused or further processed later to ensure that the recovery process meets the environmental protection requirements, and finally a recovery product of the waste liquid containing plasticizer is generated.

[0105] Further, step S32 includes the following steps:

[0106] Step S321: Determine the corresponding maximum restricted distillation temperature and minimum restricted distillation temperature according to the distillation temperature constraint;

[0107] In the embodiment of the present invention, during the recovery treatment process of the waste liquid containing plasticizer, first, according to the component characteristics and treatment objectives of the waste liquid, set the temperature constraint for the distillation process. To ensure that the distillation process of the waste liquid can effectively separate the plasticizer and its related components, first determine the boiling point range of each component in the waste liquid. According to experimental data and combined with the evaporation characteristics of the plasticizer, set the maximum restricted distillation temperature (i.e., the highest operating temperature) and the minimum restricted distillation temperature (i.e., the lowest operating temperature). The maximum restricted distillation temperature is usually set as the upper limit of the boiling point of the plasticizer, while the minimum restricted distillation temperature is usually set as the lower limit of the boiling point of the plasticizer. During operation, temperature control devices (such as precision temperature controllers, automatic temperature control distillation devices) control according to these temperature ranges to ensure that the temperature during the distillation process does not exceed or fall below the set maximum and minimum restricted temperatures, and finally determine the maximum restricted distillation temperature and the minimum restricted distillation temperature.

[0108] Step S322: Determine the corresponding plasticizer-containing recovery extraction reaction factor according to the extractant type constraint;

[0109] In the embodiment of the present invention, by selecting an extraction method suitable for plasticizer recovery according to the type of extractant. In the experiment, first screen out a suitable extractant according to the chemical properties (such as polarity, molecular weight, solubility, etc.) of the plasticizer in the waste liquid. For example, if the plasticizer in the waste liquid has strong polarity, a solvent with strong polarity can be selected as the extractant. Then, determine the extraction efficiency of different extractants through experimental tests, and derive the corresponding recovery extraction reaction factor for each extractant through theoretical calculation. This factor reflects the solubility of the extractant in the plasticizer and its extraction effect, and its accuracy is usually verified through a series of extraction tests, gas chromatography analysis, and mass spectrometry analysis. An extractant with a higher reaction factor can recover the plasticizer more effectively, while a lower reaction factor indicates a poorer extraction effect of the extractant. Through experimental verification and data calculation, determine the extraction reaction factor required for each extractant to recover the plasticizer in the waste liquid, and finally obtain the plasticizer-containing recovery extraction reaction factor.

[0110] Step S323: Determine the corresponding maximum plasticizer-containing recovery extraction amount and minimum plasticizer-containing recovery extraction amount according to the extractant dosage constraint;

[0111] In an embodiment of the present invention, by determining the influence of different dosages of the extractant on the recovery efficiency of the plasticizer, different dosages of the extractant are set, and multiple extraction experiments are carried out. The recovery rate of the plasticizer in each experiment is recorded. Based on the experimental data, a relationship curve between the dosage of the extractant and the recovery rate is plotted, and the dosage of the extractant when the recovery efficiency is the highest is determined according to the curve. The maximum dosage refers to the dosage at which the extraction efficiency reaches or approaches the maximum value, while the minimum dosage refers to the minimum dosage of the extractant that ensures the recovery effect reaches the expected value. In the operation, the usage amount of the extractant for each time is controlled by precise metering and dosing equipment (such as an automatic titration device, a metering pump) to ensure that it is within the minimum and maximum limits, so as to avoid waste of resources caused by excessive use or poor recovery effect caused by insufficient amount, and finally obtain the maximum dosage of the plasticizer recovery extraction and the minimum dosage of the plasticizer recovery extraction.

[0112] Step S324: Based on the maximum limit distillation temperature, the minimum limit distillation temperature, the plasticizer recovery extraction reaction factor, the maximum dosage of the plasticizer recovery extraction, and the minimum dosage of the plasticizer recovery extraction, use the distillation recovery efficiency calculation formula to evaluate the constrained recovery efficiency of the plasticizer-containing waste liquid recovery treatment data set corresponding to each time segment, so as to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition.

[0113] In an embodiment of the present invention, by combining the minimum limit distillation temperature, the maximum limit distillation temperature, the minimum dosage of the plasticizer recovery extraction, the maximum dosage of the plasticizer recovery extraction, the distillation temperature change parameter, the extractant dosage change parameter, the reaction intensity between the plasticizer and the extractant, the distillation temperature control influence parameter, the optimal distillation recovery operation temperature, the distillation temperature inhibition parameter, the plasticizer recovery extraction reaction factor, and related parameters, a suitable distillation recovery efficiency calculation formula is constructed for quantitative calculation to calculate the corresponding recovery efficiency, and finally the plasticizer recovery efficiency corresponding to each distillation constraint condition is obtained.

[0114] Further, the distillation recovery efficiency calculation formula described in step S324 is specifically:

[0115]

[0116] In the formula, ε d is the plasticizer recovery efficiency, T min is the minimum limit distillation temperature, T max is the maximum limit distillation temperature, M min is the minimum dosage of the plasticizer recovery extraction, M max is the maximum dosage of the plasticizer recovery extraction, T is the distillation temperature change parameter, m is the extractant dosage change parameter, D e (T) is the reaction intensity between the plasticizer and the extractant at the distillation temperature T, α2 is the influencing parameter for distillation temperature control, T opt is the optimal operating temperature for distillation recovery, β 2 is the inhibition parameter for distillation temperature, ρ is the recovery extraction reaction factor for the plasticizer-containing substance, is the correction coefficient for the recovery efficiency of the plasticizer-containing substance.

[0117] The present invention has obtained a distillation recovery efficiency calculation formula through the use of a specific mathematical model and verification, which is used to evaluate the constrained recovery efficiency of the plasticizer-containing waste liquid recovery treatment dataset corresponding to each time segment. By considering the changes in distillation temperature and extractant dosage, this distillation recovery efficiency calculation formula comprehensively analyzes the influence of multiple factors on the recovery efficiency. By optimizing the distillation temperature and extractant dosage, it can help maximize the recovery efficiency of the plasticizer, reduce energy waste, and improve the overall recovery effect. The temperature parameter in this formula limits the range of the distillation temperature, ensuring that the distillation operation is carried out within the effective temperature range, thereby avoiding the reduction of reaction efficiency or the loss of plasticizer caused by too high or too low temperature. Especially through the temperature control parameter, the significant influence of the optimal operating temperature on the recovery efficiency is considered, ensuring the best recovery effect at the ideal temperature. The D e (T) in this formula reflects the reaction intensity between the distillation temperature and the plasticizer and the extractant, indicating the influence of temperature change on reaction kinetics. Through the exponential function the influence of temperature on the reaction efficiency can be precisely controlled. Especially when approaching the optimal operating temperature, the reaction intensity is maximized, thereby improving the recovery efficiency. Through the change in the extractant content, the formula shows the influence of the extractant dosage on the recovery efficiency. Especially through this term, the optimal control of different dosages of the extractant can be achieved, avoiding the waste of resources or the decrease in recovery efficiency caused by excessive or insufficient use of the extractant. In this way, the usage amount of the extractant is reasonably optimized, which can not only ensure efficient recovery but also reduce costs. This formula comprehensively considers multiple factors (such as temperature range, extractant dosage range, reaction intensity, etc.). Through the comprehensive regulation of these factors, the recovery efficiency can be accurately evaluated and adjusted. In the complex recovery process, involving multiple constraints and influencing factors, this multi-factor calculation method can provide more accurate decision-making support for actual operations. In addition, the introduction of the correction coefficient in the formula provides flexibility, allowing for appropriate adjustment of the recovery efficiency to adapt to different experimental conditions or deviations in actual operations. This correction coefficient enables the model to be applicable not only under ideal conditions but also to be corrected in practical applications, thereby improving the adaptability and accuracy of the calculation formula. In summary, this formula fully considers the recovery efficiency ε of the plasticizer-containing substance d , the minimum restricted distillation temperature T min , the maximum restricted distillation temperature T max , the minimum dosage M of the plasticizer-containing recovery extractionmin , the maximum dosage M of the plasticizer in the recycling extraction max , the distillation temperature change parameter T, the extraction agent dosage change parameter m, and the reaction intensity D between the plasticizer and the extraction agent corresponding to the distillation temperature T e (T), the distillation temperature control influence parameter α 2 , the optimal operating temperature T for distillation recovery opt , the distillation temperature inhibition parameter β 2 , the plasticizer-containing recycling extraction reaction factor ρ, the correction coefficient of the plasticizer-containing recycling efficiency According to the plasticizer-containing recycling efficiency ε d The mutual correlation relationship with the above parameters constitutes a functional relationship:

[0118]

[0119] This formula can realize the evaluation process of the constrained recovery efficiency of the plasticizer-containing waste liquid recycling treatment dataset corresponding to each time segment. At the same time, through the correction coefficient of the plasticizer-containing recycling efficiency The introduction can be adjusted according to the error situation in the calculation process, thereby improving the accuracy and applicability of the distillation recovery efficiency calculation formula.

[0120] Furthermore, step S4 includes the following steps:

[0121] Step S41: Obtain the corresponding plasticizer purity and waste liquid impurity content from the plasticizer-containing waste liquid recycling product;

[0122] In the embodiment of the present invention, samples are taken from the plasticizer-containing waste liquid recycling product after recycling treatment, and the plasticizer purity of the recycling product is measured by a dedicated analytical instrument. Common analytical methods include techniques such as gas chromatography (GC) or high-performance liquid chromatography (HPLC). These instruments can accurately separate and quantify the plasticizer components in the recycling product. Through sample analysis, the concentration data of the plasticizer can be obtained, and then its purity can be calculated. In addition, the impurity content in the waste liquid needs to be measured by spectroscopic analysis, ICP (inductively coupled plasma spectroscopy) or other detection methods suitable for heavy metals and organic impurities in the waste liquid. The analysis results can provide the impurity content data in the plasticizer recycling product, and finally obtain the plasticizer purity and waste liquid impurity content.

[0123] Step S42: Obtain the corresponding viscosity of the plasticizer product and the boiling point of the plasticizer product from the plasticizer-containing waste liquid recycling product;

[0124] In the embodiments of the present invention, the corresponding waste liquid recovery product containing plasticizer is detected by using a rotational viscometer (such as a Brookfield viscometer) or a capillary viscometer. These instruments can accurately measure the rheological properties of the plasticizer product, so as to obtain the viscosity value of the recovered plasticizer. In order to measure the boiling point, the recovered product needs to be heated up through a distillation device, and the temperature when the product starts to boil is recorded. By measuring the viscosity and boiling point of the plasticizer product, the quality evaluation of the recovered product can be further improved, and finally the viscosity of the plasticizer product and the boiling point of the plasticizer product are obtained.

[0125] Step S43: Based on the plasticizer purity, waste liquid impurity content, plasticizer product viscosity, and plasticizer product boiling point, use the recovery product reuse evaluation calculation formula to conduct a reuse evaluation and accounting of the waste liquid recovery product containing plasticizer, so as to obtain the recovery reuse probability of the product plasticizer.

[0126] In the embodiments of the present invention, by combining the plasticizer purity, the corresponding plasticizer concentration change parameter, the initial plasticizer concentration, the plasticizer concentration change weight coefficient, the waste liquid impurity content, the impurity content weight coefficient, the plasticizer product viscosity, the plasticizer product boiling point, and related parameters, a suitable recovery product reuse evaluation calculation formula is constructed for evaluation and accounting to quantitatively obtain the reuse probability of the recovery product. The purity and impurity content of the plasticizer will directly affect the success probability of reuse, while the viscosity and boiling point reflect the adaptability of the physical properties of the plasticizer product to reuse. Finally, the recovery reuse probability of the product plasticizer is obtained.

[0127] Step S44: Based on the recovery reuse probability of the product plasticizer, conduct a product reuse analysis on the corresponding waste liquid recovery product containing plasticizer. If the recovery reuse probability of the product plasticizer reaches more than 95%, it is recommended to reuse the waste liquid recovery product containing plasticizer; otherwise, it is recommended to further recover and purify it to generate a decision on the recovery and reuse of the waste liquid containing plasticizer.

[0128] In the embodiments of the present invention, based on the previously obtained recovery product reuse probability, an analysis and decision are made on the recovery product. If the calculated recovery reuse probability of the plasticizer reaches more than 95%, it can be considered that the quality of the recovery product meets the requirements and can be directly reused. The specific operation can be to mix the recovered plasticizer with the raw materials and put them back into the production line, or use them for other purposes according to the actual needs of the enterprise. If the reuse probability does not reach 95%, the recovery product needs to be further purified. Common purification methods include solvent extraction, distillation rectification, membrane filtration, etc. Through these methods, impurities in the recovery product can be effectively removed, and the purity of the plasticizer can be improved. After completing the recovery and reuse analysis, a decision on whether to reuse or further process is obtained, and finally a decision on the recovery and reuse of the waste liquid containing plasticizer is generated.

[0129] Further, the specific calculation formula for the reuse evaluation of the recycling product in step S43 is as follows:

[0130]

[0131] In the formula, P r is the reuse probability of the product plasticizer, C p is the purity of the plasticizer, x is the change parameter of the corresponding plasticizer concentration in the recycling product of the waste liquid containing plasticizer, x 0 is the initial concentration of the plasticizer, α 1 is the weight coefficient of the plasticizer concentration change, C i is the impurity content of the waste liquid, β 1 is the weight coefficient of the impurity content, η is the viscosity of the plasticizer product, T b is the boiling point of the plasticizer product, and ξ is the correction coefficient of the reuse probability of the product plasticizer.

[0132] The present invention obtains a reuse evaluation calculation formula for recycled products of plasticizer-containing waste liquid through the use of a specific mathematical model and verification. This formula is used to evaluate and account for the reuse of recycled products of plasticizer-containing waste liquid. The purity of the plasticizer in this formula directly affects the quality of the recycled plasticizer. If the purity is high, the performance of the plasticizer is closer to that of the original plasticizer, and thus the reuse value will be higher. By introducing the purity parameter, the effectiveness of the recycled plasticizer can be accurately reflected, helping to make a decision on whether to reuse it. In the formula, the impurity content of the waste liquid, when the impurity content is high, will have a negative impact on the performance of the plasticizer, thereby reducing the reuse value of the plasticizer. By introducing the coefficient of impurity content, the formula can quantify the inhibitory effect of impurities on the reuse of recycled plasticizer, so as to reasonably consider the waste liquid impurities when evaluating reuse. The role of the plasticizer concentration change parameter and its weight can capture the change characteristics of the plasticizer concentration during the recycling process. For example, when the plasticizer concentration changes greatly, it means that the recycling process is unstable or inefficient. Therefore, through this parameter, the plasticizer reuse strategy during the recycling process can be optimized. Viscosity and boiling point are important physicochemical properties of plasticizer products, which directly affect the application performance of plasticizers. For example, a plasticizer with too high viscosity may increase the processing difficulty, and too low boiling point will cause the plasticizer to volatilize and be lost. These factors are considered in the formula, which can reasonably evaluate the reusability of plasticizers and guide how to adjust during the recycling process to improve the quality of the products. In addition, the introduction of the correction coefficient in the formula provides an additional adjustment factor for fine-tuning the probability of recycling and reuse. This coefficient can be adjusted according to the empirical data and actual situation during the actual operation process, so as to more accurately reflect the reuse potential of the recycled plasticizer. By integrating these factors into the reuse evaluation calculation formula for recycled products, the reuse potential of plasticizer recycled products can be comprehensively quantified. The integral form of the formula can reflect the reuse probability of plasticizers in different concentration change intervals, considering the influences of concentration, purity, impurities, viscosity, boiling point, etc., making the reuse evaluation results more accurate and scientific. To sum up, this formula fully considers the recycling and reuse probability P of the product plasticizer r , the plasticizer purity C p , the corresponding plasticizer concentration change parameter x in the recycled product of plasticizer-containing waste liquid, the initial plasticizer concentration x 0 , the plasticizer concentration change weight coefficient α 1 , the waste liquid impurity content C i , the impurity content weight coefficient β 1 , the plasticizer product viscosity η, the plasticizer product boiling point T b , the correction coefficient ξ of the recycling and reuse probability of the product plasticizer, according to the recycling and reuse probability P of the product plasticizer r and the mutual correlation relationship between the above parameters constitutes a functional relationship This formula can realize the reuse evaluation and accounting process of the waste liquid recovery product containing plasticizer. At the same time, by introducing the correction coefficient ξ of the reuse probability of the product plasticizer, it can be adjusted according to the error situation in the calculation process, so as to improve the accuracy and applicability of the reuse evaluation calculation formula of the recovery product.

[0133] Furthermore, the present invention also provides a recovery treatment and reuse analysis system for waste liquid containing plasticizer, which is used to execute the recovery treatment and reuse analysis method for waste liquid containing plasticizer as described above. The recovery treatment and reuse analysis system for waste liquid containing plasticizer includes:

[0134] A real-time monitoring module for the waste liquid treatment process, which is used to install a gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry at each position node at the source of the waste liquid containing plasticizer, and use the gas chromatography-mass spectrometry or inductively coupled plasma mass spectrometry to monitor the types of plasticizers, concentration contents, and plasma concentrations of impurity components in the waste liquid containing plasticizer in real time, so as to generate a waste liquid composition monitoring data set containing plasticizer; place the corresponding waste liquid containing plasticizer into a distillation tower for distillation recovery, and use various sensors to monitor the temperature, pressure, flow rate, and pH value corresponding to the distillation recovery process in real time, so as to obtain a waste liquid recovery reaction data set;

[0135] A waste liquid recovery data preprocessing module, which is used to transmit the waste liquid composition monitoring data set containing plasticizer and the waste liquid recovery reaction data set to the data processing center in real time through a wireless transmission method, and use the data processing center to perform fusion and segmentation processing on the waste liquid composition monitoring data set containing plasticizer and the waste liquid recovery reaction data set, so as to obtain a waste liquid recovery treatment data set containing plasticizer corresponding to each time segment;

[0136] A recovery constraint maximization processing module, which is used to design a plasticizer recovery distillation constraint corresponding to the distillation tower, and evaluate the constraint recovery efficiency of the waste liquid recovery treatment data set containing plasticizer corresponding to each time segment based on the plasticizer recovery distillation constraint, so as to obtain the plasticizer recovery efficiency corresponding to each distillation constraint condition; determine the corresponding plasticizer recovery constraint maximization combination according to the plasticizer recovery efficiency corresponding to each distillation constraint condition, and perform distillation recovery treatment on the corresponding waste liquid containing plasticizer according to the plasticizer recovery constraint maximization combination, so as to generate a waste liquid recovery product containing plasticizer;

[0137] The recycled product reuse evaluation module is used to obtain the corresponding plasticizer purity and waste liquid impurity content from the recycled product of the waste liquid containing plasticizer, and conduct a reuse evaluation and accounting of the recycled product of the waste liquid containing plasticizer based on the plasticizer purity and waste liquid impurity content, so as to obtain the recycling and reuse probability of the product plasticizer; conduct product reuse analysis on the corresponding recycled product of the waste liquid containing plasticizer based on the recycling and reuse probability of the product plasticizer, so as to generate a decision on the recycling and reuse of the waste liquid containing plasticizer.

[0138] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the application document are intended to be included in the present invention.

[0139] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features invented herein.

Claims

1. A method for recycling and reusing waste liquid containing plasticizer, characterized in that: The following steps are involved: Step S1: installing a gas chromatography-mass spectrometer or an inductively coupled plasma mass spectrometer at each location node of the source of the plasticizer-containing waste liquid, and using the gas chromatography-mass spectrometer or the inductively coupled plasma mass spectrometer to monitor the type, concentration content and ion concentration of the corresponding plasticizer in the plasticizer-containing waste liquid in real time, so as to generate a monitoring data set of the plasticizer-containing waste liquid components; placing the corresponding plasticizer-containing waste liquid in a distillation tower for distillation recovery, and using various sensors to monitor the temperature, pressure, flow rate and pH value corresponding to the distillation recovery process in real time, so as to obtain a waste liquid recovery reaction data set; Step S2: transmitting the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set to the data processing center in real time by wireless transmission, and using the data processing center to fuse and segment the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set to obtain the corresponding plasticizer-containing waste liquid recovery processing data set in each time segment; Step S3: designing corresponding plasticizer-containing recovery distillation constraints through a distillation tower, and evaluating the constraint recovery efficiency of the corresponding plasticizer-containing waste liquid recovery processing data set under each time segment based on the plasticizer-containing recovery distillation constraints, so as to obtain the corresponding plasticizer-containing recovery efficiency under each distillation constraint condition; determining the corresponding plasticizer-containing recovery constraint maximization combination according to the corresponding plasticizer-containing recovery efficiency under each distillation constraint condition, and performing distillation recovery processing on the corresponding plasticizer-containing waste liquid according to the plasticizer-containing recovery constraint maximization combination, so as to generate a plasticizer-containing waste liquid recovery product; Step S4: Obtain the corresponding plasticizer purity and waste liquid impurity content through the plasticizer-containing waste liquid recovery product, and perform reuse evaluation and calculation on the plasticizer-containing waste liquid recovery product based on the plasticizer purity and the waste liquid impurity content to obtain the product plasticizer recovery and reuse probability; perform product reuse analysis on the corresponding plasticizer-containing waste liquid recovery product based on the product plasticizer recovery and reuse probability to generate a plasticizer-containing waste liquid recovery and reuse decision.

2. The method for recycling and reusing plasticizer-containing waste liquid according to claim 1, characterized in that: Step S1 includes the following steps: Step S11: installing, debugging and calibrating a corresponding gas chromatography-mass spectrometer or inductively coupled plasma mass spectrometer at each location node of the source of the plasticizer-containing waste liquid; Step S12: using a gas chromatography-mass spectrometer or an inductively coupled plasma mass spectrometer to monitor in real time the type and concentration of the corresponding plasticizer in the plasticizer-containing waste liquid, as well as the plasma concentration of the impurity components, so as to generate a monitoring data set of the components of the plasticizer-containing waste liquid; Step S13: placing the corresponding plasticizer-containing waste liquid into a distillation tower to perform a distillation recovery operation simulation to generate a distillation recovery process for the plasticizer-containing waste liquid; Step S14: various sensors are used to monitor the process parameters of the distillation recovery process of the plasticizer-containing waste liquid in real time, so as to monitor the temperature, pressure, flow rate and pH value corresponding to the distillation recovery process in real time and obtain a waste liquid recovery reaction data set.

3. The method for recycling and reusing plasticizer-containing waste liquid according to claim 2, characterized in that: The types of plasticizers described in step S12 are specifically phthalates and phosphates.

4. The method for recycling and reusing plasticizer-containing waste liquid according to claim 1, characterized in that: Step S2 includes the following steps: Step S21: transmitting the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set to the data processing center in real time via wireless transmission; Step S22: using the data processing center to merge and store the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set into the same data set, and perform data cleaning on the data to remove environmental noise, equipment noise, outliers and duplicate data, so as to obtain a high-quality data set for plasticizer-containing waste liquid recovery; Step S23: normalizing the high-quality data set of the waste liquid containing plasticizer for recycling, so as to unify the plasticizer-containing components and recycling reaction parameters of different magnitudes to the same scale, and obtain a normalized data set of the waste liquid containing plasticizer for recycling; Step S24: performing time series synchronization processing on the normalized data set of waste liquid containing plasticizers for recycling, so as to obtain a large data set of waste liquid containing plasticizers for recycling in the same time series range; Step S25: performing time segment division processing on the large data set of waste liquid recycling containing plasticizers in the same time range to obtain the waste liquid recycling processing data set containing plasticizers corresponding to each time segment.

5. The method for recycling and reusing plasticizer-containing waste liquid according to claim 1, characterized in that: Step S3 includes the following steps: Step S31: designing corresponding plasticizer recovery distillation constraints through a distillation tower, including distillation temperature constraints, extractant type constraints, and extractant dosage constraints; Step S32: Based on the plasticizer-containing recovery distillation constraint, a constraint recovery efficiency evaluation is performed on the corresponding plasticizer-containing waste liquid recovery processing data set under each time segment to obtain the corresponding plasticizer-containing recovery efficiency under each distillation constraint condition; Step S33: determining a corresponding plasticizer-containing recovery constraint maximization combination according to the corresponding plasticizer-containing recovery efficiency under each distillation constraint condition; Step S34: performing distillation recovery treatment on the corresponding plasticizer-containing waste liquid according to the plasticizer-containing recovery constraint maximization combination to generate a plasticizer-containing waste liquid recovery product.

6. The method for recycling and reusing plasticizer-containing waste liquid according to claim 5, characterized in that: Step S32 includes the following steps: Step S321: determining the corresponding maximum limit distillation temperature and minimum limit distillation temperature according to the distillation temperature constraint; Step S322: determining the corresponding plasticizer-containing recovery extraction reaction factor according to the extraction agent type constraint; Step S323: determining the corresponding maximum amount of plasticizer-containing recovery extraction and the minimum amount of plasticizer-containing recovery extraction according to the extraction agent dosage constraint; Step S324: Based on the maximum restricted distillation temperature, the minimum restricted distillation temperature, the plasticizer recovery extraction reaction factor, the maximum amount of plasticizer recovery extraction and the minimum amount of plasticizer recovery extraction, the distillation recovery efficiency calculation formula is used to evaluate the constrained recovery efficiency of the corresponding plasticizer-containing waste liquid recovery processing data set in each time segment to obtain the corresponding plasticizer recovery efficiency under each distillation constraint condition.

7. The method for recycling and reusing plasticizer-containing waste liquid according to claim 6, characterized in that: The calculation formula for the distillation recovery efficiency described in step S324 is specifically: In the formula, ε d is the recycling efficiency of plasticizer, T min is the minimum limiting distillation temperature, T max is the maximum limiting distillation temperature, M min The minimum amount of plasticizer recovery extraction, M max is the maximum amount of plasticizer recovery extraction, T is the distillation temperature change parameter, m is the extraction agent dosage change parameter, D e (T) is the reaction intensity between the plasticizer and the extractant at the distillation temperature T, α2 is the distillation temperature control influencing parameter, T opt is the optimal operating temperature for distillation recovery, β2 is the distillation temperature inhibition parameter, ρ is the extraction reaction factor for recovery containing plasticizer, and ζ is the correction coefficient for recovery efficiency containing plasticizer.

8. The method for recycling and reusing plasticizer-containing waste liquid according to claim 1, characterized in that: Step S4 includes the following steps: Step S41: obtaining the corresponding plasticizer purity and waste liquid impurity content through the plasticizer-containing waste liquid recovery product; Step S42: obtaining the corresponding plasticizer product viscosity and plasticizer product boiling point through the plasticizer-containing waste liquid recovery product; Step S43: Based on the plasticizer purity, the impurity content of the waste liquid, the viscosity of the plasticizer product and the boiling point of the plasticizer product, the reuse evaluation calculation formula of the recovered product is used to evaluate and calculate the reuse of the recovered product of the waste liquid containing the plasticizer, so as to obtain the probability of recovery and reuse of the product plasticizer; Step S44: Based on the probability of product plasticizer recovery and reuse, the corresponding plasticizer-containing waste liquid recovery product is analyzed for product reuse. If the probability of product plasticizer recovery and reuse reaches 95% or more, it is recommended to reuse the plasticizer-containing waste liquid recovery product. Otherwise, it is recommended to further recycle and purify the product to generate a decision on the recovery and reuse of the plasticizer-containing waste liquid.

9. The method for recycling and reusing plasticizer-containing waste liquid according to claim 8, characterized in that: The calculation formula for evaluating the reuse of the recovered product described in step S43 is specifically: Where P r is the probability of recycling and reuse of the product plasticizer, C p is the plasticizer purity, x is the corresponding plasticizer concentration change parameter in the plasticizer-containing waste liquid recovery product, x0 is the initial concentration of the plasticizer, α1 is the plasticizer concentration change weight coefficient, C i is the impurity content of the waste liquid, β1 is the weight coefficient of the impurity content, η is the viscosity of the plasticizer product, T b is the boiling point of the plasticizer product, and ξ is the correction coefficient for the probability of recycling and reuse of the product plasticizer.

10. A recycling and reuse analysis system for waste liquid containing plasticizers, characterized in that: Used to perform the method for recycling and reusing analysis of waste liquid containing plasticizers as claimed in claim 1, the recycling and reusing analysis system for waste liquid containing plasticizers comprises: The real-time monitoring module of the waste liquid treatment process is used to install a gas chromatography-mass spectrometer or an inductively coupled plasma mass spectrometer at each location node of the source of the plasticizer-containing waste liquid, and use the gas chromatography-mass spectrometer or the inductively coupled plasma mass spectrometer to monitor the corresponding plasticizer type, concentration content and plasma concentration of impurity components in the plasticizer-containing waste liquid in real time, so as to generate a monitoring data set of the plasticizer-containing waste liquid components; the corresponding plasticizer-containing waste liquid is placed in a distillation tower for distillation recovery, and the temperature, pressure, flow rate and pH value corresponding to the distillation recovery process are monitored in real time by various sensors, so as to obtain a waste liquid recovery reaction data set; The waste liquid recovery data preprocessing module is used to transmit the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set to the data processing center in real time through wireless transmission, and use the data processing center to fuse and segment the plasticizer-containing waste liquid component monitoring data set and the waste liquid recovery reaction data set, so as to obtain the corresponding plasticizer-containing waste liquid recovery processing data set under each time segment; A recycling constraint maximization processing module is used to design corresponding plasticizer-containing recycling distillation constraints through a distillation tower, and based on the plasticizer-containing recycling distillation constraints, perform constraint recovery efficiency evaluation on the corresponding plasticizer-containing waste liquid recycling processing data set under each time segment to obtain the corresponding plasticizer-containing recycling efficiency under each distillation constraint condition; determine the corresponding plasticizer-containing recycling constraint maximization combination according to the corresponding plasticizer-containing recycling efficiency under each distillation constraint condition, and perform distillation recovery processing on the corresponding plasticizer-containing waste liquid according to the plasticizer-containing recycling constraint maximization combination to generate a plasticizer-containing waste liquid recovery product; The recycling product reuse evaluation module is used to obtain the corresponding plasticizer purity and waste liquid impurity content through the plasticizer-containing waste liquid recycling product, and to perform reuse evaluation and calculation on the plasticizer-containing waste liquid recycling product based on the plasticizer purity and the waste liquid impurity content to obtain the product plasticizer recycling reuse probability; based on the product plasticizer recycling reuse probability, the corresponding plasticizer-containing waste liquid recycling product is analyzed for product reuse to generate a plasticizer-containing waste liquid recycling reuse decision.

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