Electropolishing cleaning water acid recovery method and system based on nanofiltration-reverse osmosis technology

Abstract

The invention relates to the technical field of industrial wastewater treatment and resource recovery, in particular to an electropolishing cleaning water acid recovery method and system based on a nanofiltration-reverse osmosis technology, and the system comprises an acid recovery treatment center, a process evaluation unit, a basic interference unit, a hardware supervision unit, a recovery comprehensive management unit and an execution response unit; according to the method, analysis is preliminarily carried out from the aspect of the stability of the acid recovery rate of electric throwing cleaning water treatment, supervision of the stability and safety of the acid recovery rate of the electric throwing cleaning water is improved, and analysis is carried out from the aspects of basic conditions and hardware conditions based on an information feedback mode, so that management treatment of different degrees is carried out according to feedback conditions; according to the method, the influence of interference on the acid recovery rate of the electropolishing cleaning water is reduced, and meanwhile, the acid recovery quality is analyzed, so that the recovery quality condition of the recovered acid concentration of the electropolishing cleaning water can be intuitively known, the acid recovery of the electropolishing cleaning water is integrally managed, and the acid recovery quality and stability are ensured.

Description

Technical Field

[0001] This invention relates to the field of industrial wastewater treatment and resource recovery technology, and in particular to a method and system for recovering acid from electropolishing cleaning water based on nanofiltration-reverse osmosis technology. Background Technology

[0002] Electroplating cleaning water is a common type of wastewater in the electroplating industry. It mainly contains acidic substances (such as phosphoric acid and sulfuric acid), metal ions (such as aluminum ions) and other impurities. Traditional treatment methods mostly use neutralization and precipitation, which neutralizes acidic wastewater by adding alkaline substances to form precipitates for solid waste treatment. This method not only wastes acid resources but also increases treatment costs and environmental burden.

[0003] In recent years, membrane separation technologies (such as nanofiltration and reverse osmosis) have been widely used in wastewater treatment due to their high efficiency in separation and concentration. However, existing technologies still have the following problems in acid recovery from electropolishing cleaning water: the acid recovery rate is low, especially in the treatment of low-concentration cleaning water, the recovery efficiency is not ideal, the separation effect of metal ions (such as aluminum ions) and acid is unstable, affecting the purity of the recovered acid, and it is difficult to rationally manage the acid recovery rate based on its dynamic situation. It is also difficult to manage different levels of interference and to make overall adjustments based on the acid recovery quality, resulting in poor stability of acid recovery quality.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for acid recovery from electropolishing cleaning water based on nanofiltration-reverse osmosis technology, to address the aforementioned technical deficiencies. This invention initially analyzes the stability of acid recovery rate in electropolishing cleaning water treatment, improving the monitoring of the stability and safety of acid recovery rate. Simultaneously, it analyzes both basic and hardware conditions based on information feedback, allowing for different levels of operational management based on feedback to reduce the impact of interference on the acid recovery rate. Furthermore, it analyzes the acid recovery quality to intuitively understand the recovery concentration and quality of the recovered acid in the electropolishing cleaning water, enabling overall management of acid recovery and ensuring its quality and stability.

[0006] The objective of this invention can be achieved through the following technical solution: an acid recovery system for electropolishing cleaning water based on nanofiltration-reverse osmosis technology, comprising an acid recovery treatment center, a process evaluation unit, a basic interference unit, a hardware monitoring unit, a comprehensive recovery management unit, and an execution response unit;

[0007] The acid recovery and treatment center is used to retrieve the treatment information of the electropolishing cleaning water and send the treatment information to the process evaluation unit for electropolishing cleaning water treatment evaluation and analysis. The obtained recovery floating interval is judged and processed to obtain risk signals or stability signals.

[0008] When a risk signal is generated, the basic interference unit is used to perform basic condition interference assessment and analysis on the collected treatment parameters of electropolishing cleaning water to obtain basic normal signal or basic defect signal. The hardware monitoring unit is used to perform basic recycling support assessment and analysis on the collected infrastructure operating condition information to obtain normal signal or potential risk signal.

[0009] The integrated management unit is used to perform dynamic evaluation and analysis of the acid recovery quality of the collected electropolishing cleaning water, and obtain a continuous qualified signal, a single interference signal, or a dual interference signal.

[0010] When a continuous qualified signal is generated: the obtained dynamic recovery balance is processed to obtain a dynamic balance signal or a dynamic management signal.

[0011] Preferably, the evaluation and analysis process for the electropolishing cleaning water treatment is as follows:

[0012] The electropolishing cleaning water treatment period was collected and set as a time threshold. The treatment information of the electropolishing cleaning water within the time threshold was obtained. The treatment information includes preliminary filtration, primary nanofiltration, secondary nanofiltration, reverse osmosis concentration and acid reuse.

[0013] The acid recovery rate of electropolishing cleaning water within the time threshold is obtained. A characteristic curve of the acid recovery rate of electropolishing cleaning water is constructed based on the time series. The maximum peak value and minimum trough value are obtained based on the characteristic curve of the acid recovery rate of electropolishing cleaning water. The difference between the maximum peak value and the minimum trough value is set as the recovery floating interval. The recovery floating interval is processed to obtain the risk signal or the stable signal.

[0014] Preferably, the basic condition interference assessment and analysis process is as follows:

[0015] The parameter compliance rate of the electropolishing cleaning water within the time threshold is obtained. The processing parameters include the operating pressure of the nanofiltration equipment and the initial density of the cleaning water. The parameter compliance rate is the ratio between the number of parameters whose values ​​meet the preset range requirements and the total number of parameters.

[0016] The operation and maintenance management information of membrane components, including nanofiltration membranes and reverse osmosis membranes, is obtained within a time threshold for electropolishing cleaning water. The operation and maintenance management information includes operation and maintenance delay duration and operation and maintenance interval duration. The ratio between operation and maintenance delay duration and operation and maintenance interval duration is set as the operation and maintenance error value, and the mean of the operation and maintenance error value is set as the delay error value. The parameter compliance rate and delay error value are processed to obtain basic normal signals or basic defect signals.

[0017] Preferably, the basic recycling support assessment and analysis process is as follows:

[0018] The operating condition information of the infrastructure for electropolishing water cleaning within the time threshold is obtained. The infrastructure includes water supply pumps and water supply power supply. The operating condition information includes the degree of fit of operating characteristics and the depth of operating defects.

[0019] The operational feature fit indicates the number of operational features that exceed the preset threshold. Operational features include operating temperature and vibration amplitude. The operational defect depth indicates the portion of the time between the start of the command control and the execution of the command that exceeds the preset time.

[0020] Preferably, the operating feature fit degree and operating defect depth are judged and processed: if the operating feature fit degree is less than a preset operating feature fit degree threshold and the operating defect depth is less than a preset operating defect depth threshold, the corresponding infrastructure is determined to be a stable facility; if the operating feature fit degree is greater than or equal to the preset operating feature fit degree threshold, or the operating defect depth is greater than or equal to the preset operating defect depth threshold, the corresponding infrastructure is determined to be a potential facility. The ratio between the number of potential facilities and the number of stable facilities is obtained and set as the basic support degree. The basic support degree is then judged and processed to obtain a normal signal or a potential risk signal.

[0021] Preferably, the dynamic evaluation and analysis process for acid recovery quality is as follows: Interactive analysis is performed on basic conventional signals, basic defect signals, normal signals, and potential risk signals. If basic conventional signals and normal signals are generated, a continuously qualified signal is obtained. If basic conventional signals and potential risk signals, or basic defect signals and normal signals, are generated, a single interference signal is obtained. If basic defect signals and potential risk signals are generated, a dual interference signal is obtained.

[0022] Preferably, when a continuous qualified signal is generated: the recovered acid concentration of the electropolishing cleaning water within the time threshold is obtained, a characteristic curve of the recovered acid concentration of the electropolishing cleaning water is constructed based on the time series, the recovered acid concentration corresponding to the inflection point is obtained based on the characteristic curve of the recovered acid concentration, the inflection point represents the point where the recovered acid concentration changes, a set A of recovered acid concentrations is constructed, the variance value of the set is obtained, and the variance value of the set is set as the dynamic recovery balance degree, and the dynamic recovery balance degree is discriminated to obtain a dynamic balance signal or a dynamic management signal.

[0023] The beneficial effects of this invention are as follows:

[0024] (1) This invention initially analyzes the stability of acid recovery rate in electropolishing cleaning water treatment, which helps to achieve efficient recovery of acid and efficient retention of metal ions in electropolishing cleaning water, while improving the stability and safety supervision of acid recovery rate in electropolishing cleaning water.

[0025] (2) Based on information feedback, this invention analyzes the basic conditions and hardware conditions to understand whether the low acid recovery rate is caused by interference from the basic conditions or hardware conditions. Based on the information feedback, it can intuitively understand whether the low acid recovery rate of electropolishing cleaning water is caused by a single interference or a double interference, so as to carry out different levels of operation and management treatment according to the feedback situation, so as to reduce the impact of interference on the acid recovery rate of electropolishing cleaning water. At the same time, the acid recovery quality is analyzed to intuitively understand the recovery quality of the acid concentration of electropolishing cleaning water, so as to carry out overall management of acid recovery of electropolishing cleaning water, and ensure the acid recovery quality and stability. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings;

[0027] Figure 1 This is a flowchart of the system of the present invention;

[0028] Figure 2 This is a reference diagram of the method of the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments;

[0031] Example 1:

[0032] Please see Figures 1 to 2As shown, the present invention is an acid recovery system for electropolishing cleaning water based on nanofiltration-reverse osmosis technology, including an acid recovery treatment center, a process evaluation unit, a basic interference unit, a hardware monitoring unit, a comprehensive recovery management unit, and an execution response unit. The acid recovery treatment center is communicatively connected to the process evaluation unit, the process evaluation unit is communicatively connected to the basic interference unit and the hardware monitoring unit, the basic interference unit and the hardware monitoring unit are communicatively connected to the comprehensive recovery management unit, and the comprehensive recovery management unit is communicatively connected to the execution response unit.

[0033] The acid recovery and treatment center is used to retrieve the treatment information of the electropolishing cleaning water and send it to the process evaluation unit for evaluation and analysis. This is to understand the stability of the acid recovery rate of the electropolishing cleaning water, so as to make timely adjustments and management to address any interfering factors and improve the stability and safety of the acid recovery rate. The specific evaluation and analysis process for the electropolishing cleaning water is as follows:

[0034] The electropolishing cleaning water treatment period was collected and set as a time threshold. The treatment information of the electropolishing cleaning water within the time threshold was obtained. The treatment information includes preliminary filtration, primary nanofiltration, secondary nanofiltration, reverse osmosis concentration and acid reuse.

[0035] Preliminary filtration refers to the first filtration of electropolishing cleaning water, including filters and sedimentation tanks, to remove suspended solids and particulate impurities;

[0036] Primary nanofiltration means that the pre-filtered cleaning water is passed into a nanofiltration device and treated by a nanofiltration membrane (utilizing the nanofiltration membrane's permeability to acidic substances and its high rejection rate for metal ions (such as aluminum ions)) to achieve the initial separation of acid and metal ions, resulting in primary nanofiltration dilute and primary nanofiltration concentrate.

[0037] Secondary nanofiltration refers to diluting the concentrated solution from the primary nanofiltration with pure water to n times its original volume, and then passing it through the nanofiltration device again, where n ∈ (1.5, 2), to further recover acidic substances and obtain secondary nanofiltration dilute solution and secondary nanofiltration concentrate.

[0038] Reverse osmosis concentration refers to the process of combining primary and secondary nanofiltration distillates and then feeding them into a reverse osmosis device. The reverse osmosis membrane is used to concentrate the primary and secondary nanofiltration distillates to obtain reverse osmosis concentrate (high-concentration acid solution) and reverse osmosis distillate (which can be reused or discharged).

[0039] Acid reuse means that the reverse osmosis concentrate is recycled as acid and reused in the electropolishing cleaning process, while the reverse osmosis desalination can be reused as pure water or discharged in compliance with standards.

[0040] The acid recovery rate of electropolishing cleaning water within a time threshold is obtained. A characteristic curve of the acid recovery rate of electropolishing cleaning water is constructed based on the time series. The maximum peak value and minimum trough value are obtained from the characteristic curve. The difference between the maximum peak value and the minimum trough value is set as the recovery floating interval. The recovery floating interval is judged. If the recovery floating interval is less than the preset recovery floating interval threshold, a stable signal is generated. If the recovery floating interval is greater than or equal to the preset recovery floating interval threshold, a risk signal is generated. The execution response unit is used to respond to the risk signal or the stable signal and immediately display the preset early warning operation corresponding to the risk signal or the stable signal. This is to understand the stability of the acid recovery rate of electropolishing cleaning water and to make timely adjustments and management of factors that cause interference, so as to improve the stability and safety of the acid recovery rate of electropolishing cleaning water.

[0041] Example 2:

[0042] When a risk signal is generated, the basic interference unit is used to perform a basic condition interference assessment and analysis on the collected electropolishing cleaning water treatment parameters. This analysis considers both basic operating parameters and component management to determine whether the low acid recovery rate is caused by these factors. The specific basic condition interference assessment and analysis process is as follows:

[0043] The parameter compliance rate of the electropolishing cleaning water within the time threshold is obtained. The processing parameters include the operating pressure of the nanofiltration equipment and the initial density of the cleaning water. The parameter compliance rate is the ratio between the number of parameters whose corresponding values ​​meet the preset range requirements and the total number of parameters. For example, if the actual operating pressure of the nanofiltration equipment meets the preset range of 0.5-1.5MPa, it is judged as compliant; if the actual operating pressure of the nanofiltration equipment does not meet the preset range of 0.5-1.5MPa, it is judged as non-compliant.

[0044] The system acquires the operation and maintenance management information of membrane components, including nanofiltration membranes and reverse osmosis membranes, within a time threshold for electropolishing cleaning water. The operation and maintenance management information includes operation and maintenance delay duration and operation and maintenance interval duration. The ratio between operation and maintenance delay duration and operation and maintenance interval duration is set as the operation and maintenance error value, and the average value of operation and maintenance error values ​​is set as the delay error value. The system then performs discrimination processing on parameter compliance rate and delay error value. If the parameter compliance rate is greater than or equal to the preset parameter compliance rate threshold and the delay error value is less than the preset delay error value threshold, a basic normal signal is generated. If the parameter compliance rate is less than the preset parameter compliance rate threshold, or the delay error value is greater than or equal to the preset delay error value threshold, a basic defect signal is generated.

[0045] When a risk signal is generated, the hardware monitoring unit is used to perform a basic recovery support assessment and analysis on the collected infrastructure operating information. That is, it analyzes the interference with acid recovery rate from the perspective of hardware conditions. The specific basic recovery support assessment and analysis process is as follows:

[0046] The operating condition information of the infrastructure for electropolishing water cleaning within the time threshold is obtained. The infrastructure includes water supply pumps, water supply power supply, etc. The operating condition information includes the degree of fit of operating characteristics and the depth of operating defects.

[0047] The operational feature fit indicates the number of operational features that exceed the preset threshold. Operational features include operating temperature, vibration amplitude, etc. The operational defect depth indicates the portion of the time between the start of the command control and the execution of the command that exceeds the preset time.

[0048] The system then performs discrimination processing on the operational feature fit and operational defect depth: if the operational feature fit is less than a preset operational feature fit threshold and the operational defect depth is less than a preset operational defect depth threshold, the corresponding infrastructure is determined to be a stable facility; if the operational feature fit is greater than or equal to a preset operational feature fit threshold or the operational defect depth is greater than or equal to a preset operational defect depth threshold, the corresponding infrastructure is determined to be a potential facility. The system obtains the ratio between the number of potential facilities and the number of stable facilities and sets it as the basic support level. The system then performs discrimination processing on the basic support level: if the basic support level is less than a preset basic support level threshold, a normal signal is generated; if the basic support level is greater than or equal to a preset basic support level threshold, a potential risk signal is generated.

[0049] The integrated management unit is used to dynamically evaluate and analyze the acid recovery quality of the collected electropolishing cleaning water. This allows the unit to determine whether the low acid recovery rate is due to a single or dual interference, and also to assess the quality of the recovered acid concentration. The specific dynamic evaluation and analysis process for acid recovery quality is as follows:

[0050] The system performs interactive analysis on basic normal signals, basic defect signals, normal signals, and potential risk signals. If basic normal signals and normal signals are generated, a continuous qualified signal is obtained. If basic normal signals and potential risk signals or basic defect signals and normal signals are generated, a single interference signal is obtained. If basic defect signals and potential risk signals are generated, a double interference signal is obtained. The execution response unit is used to respond to the continuous qualified signal, single interference signal, or double interference signal and immediately display the preset warning text corresponding to the continuous qualified signal, single interference signal, or double interference signal. This allows for a clear understanding of whether the low acid recovery rate of the electropolishing cleaning water is caused by a single interference or a double interference. Based on the feedback, different levels of operational management can be carried out to reduce the impact of interference on the acid recovery rate of the electropolishing cleaning water.

[0051] When a continuous qualified signal is generated:

[0052] The recovered acid concentration of the electropolishing cleaning water within a time threshold is obtained. A characteristic curve of the recovered acid concentration of the electropolishing cleaning water is constructed based on the time series. The recovered acid concentration corresponding to the inflection point is obtained based on the characteristic curve of the recovered acid concentration. The inflection point represents the point where the recovered acid concentration changes. A set A of recovered acid concentrations is constructed, and the variance value of the set is obtained. The variance value of the set is set as the dynamic recovery balance degree. The dynamic recovery balance degree is judged. If the dynamic recovery balance degree is less than the preset dynamic recovery balance degree threshold, a dynamic balance signal is generated. If the dynamic recovery balance degree is greater than or equal to the preset dynamic recovery balance degree threshold, a dynamic management signal is generated.

[0053] The execution response unit is used to respond to dynamic balance signals or dynamic management signals and immediately display the preset warning text corresponding to the dynamic balance signals or dynamic management signals, so as to intuitively understand the recovery quality of acid concentration in electropolishing cleaning water, so as to carry out overall management of acid recovery in electropolishing cleaning water and ensure the quality and stability of acid recovery.

[0054] Example 3:

[0055] A method for recovering acid from electropolishing cleaning water based on nanofiltration-reverse osmosis technology includes the following steps:

[0056] Step 1: Preliminary filtration, primary nanofiltration, secondary nanofiltration, reverse osmosis concentration, and acid reuse treatment of electropolishing cleaning water;

[0057] Step 2: Based on the information progression, the basic condition monitoring feedback analysis process of electropolishing cleaning water is carried out, that is, the obtained parameter compliance rate and delay error value are judged and processed, and the obtained basic conventional signal or basic defect signal is substituted into step 4.

[0058] Step 3: Based on the information progression, the time period infrastructure working condition safety analysis process of electropolishing cleaning water is carried out, that is, the working condition information of the infrastructure is analyzed, the obtained foundation support degree is judged and processed, and the obtained normal signal or potential risk signal is substituted into Step 4.

[0059] Step 4: Interference classification and dynamic recovery evaluation process based on information feedback, that is, interactive analysis of basic normal signals, basic defect signals, normal signals and potential risk signals to obtain continuous qualified signals or single interference signals or dual interference signals. When a continuous qualified signal is generated, the obtained dynamic recovery balance is analyzed, and the dynamic balance signal or dynamic management signal is fed back as output.

[0060] In summary, this invention initially analyzes the stability of acid recovery rate in electropolishing cleaning water treatment, which helps to achieve efficient acid recovery and metal ion retention in electropolishing cleaning water. It also improves the monitoring of the stability and safety of acid recovery rate in electropolishing cleaning water. Furthermore, based on information feedback, the invention analyzes both basic and hardware conditions to understand whether low acid recovery rate is caused by interference from these conditions. The feedback also provides a clear understanding of whether low acid recovery rate is due to a single or dual interference, allowing for different levels of operational management based on the feedback to reduce the impact of interference on acid recovery rate. Finally, the invention analyzes the quality of acid recovery to provide a clear understanding of the quality of acid concentration recovered from the electropolishing cleaning water, enabling overall management of acid recovery and ensuring its quality and stability.

[0061] The threshold is set for comparative analysis of results to determine whether they are good or bad. The value of the threshold is determined by a combination of large-scale model analysis of sample data and human experience. It can also be adjusted appropriately based on seasonal or common-sense influencing factors.

[0062] The size of the coefficient is a specific value obtained by quantifying each parameter to facilitate subsequent comparison. The size of the coefficient depends on the amount of sample data and the corresponding operating coefficient initially set by those skilled in the art for each set of sample data; as long as it does not affect the proportional relationship between the parameter and the quantified value.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An acid recovery system for electropolishing cleaning water based on nanofiltration-reverse osmosis technology, characterized in that, It includes an acid recovery and treatment center, a process assessment unit, a basic interference unit, a hardware monitoring unit, a comprehensive recovery management unit, and an execution response unit; The acid recovery and treatment center is used to retrieve the treatment information of the electropolishing cleaning water and send the treatment information to the process evaluation unit for electropolishing cleaning water treatment evaluation and analysis. The obtained recovery floating interval is judged and processed to obtain risk signals or stability signals. When a risk signal is generated, the basic interference unit is used to perform basic condition interference assessment and analysis on the collected treatment parameters of electropolishing cleaning water to obtain basic normal signal or basic defect signal. The hardware monitoring unit is used to perform basic recycling support assessment and analysis on the collected infrastructure operating condition information to obtain normal signal or potential risk signal. The integrated management unit is used to perform dynamic evaluation and analysis of the acid recovery quality of the collected electropolishing cleaning water, and obtain a continuous qualified signal, a single interference signal, or a dual interference signal. When a continuous qualified signal is generated: the obtained dynamic recovery balance is processed to obtain a dynamic balance signal or a dynamic management signal.

2. The electropolishing cleaning water acid recovery system based on nanofiltration-reverse osmosis technology according to claim 1, characterized in that, The evaluation and analysis process for water treatment during electropolishing cleaning is as follows: The electropolishing cleaning water treatment period was collected and set as a time threshold. The treatment information of the electropolishing cleaning water within the time threshold was obtained. The treatment information includes preliminary filtration, primary nanofiltration, secondary nanofiltration, reverse osmosis concentration and acid reuse. The acid recovery rate of electropolishing cleaning water within the time threshold is obtained. A characteristic curve of the acid recovery rate of electropolishing cleaning water is constructed based on the time series. The maximum peak value and minimum trough value are obtained based on the characteristic curve of the acid recovery rate of electropolishing cleaning water. The difference between the maximum peak value and the minimum trough value is set as the recovery floating interval. The recovery floating interval is processed to obtain the risk signal or the stable signal.

3. The electropolishing cleaning water acid recovery system based on nanofiltration-reverse osmosis technology according to claim 1, characterized in that, The basic condition interference assessment and analysis process is as follows: The parameter compliance rate of the electropolishing cleaning water within the time threshold is obtained. The processing parameters include the operating pressure of the nanofiltration equipment and the initial density of the cleaning water. The parameter compliance rate is the ratio between the number of parameters whose values ​​meet the preset range requirements and the total number of parameters. The operation and maintenance management information of membrane components, including nanofiltration membranes and reverse osmosis membranes, is obtained within a time threshold for electropolishing cleaning water. The operation and maintenance management information includes operation and maintenance delay duration and operation and maintenance interval duration. The ratio between operation and maintenance delay duration and operation and maintenance interval duration is set as the operation and maintenance error value, and the mean of the operation and maintenance error value is set as the delay error value. The parameter compliance rate and delay error value are processed to obtain basic normal signals or basic defect signals.

4. The electropolishing cleaning water acid recovery system based on nanofiltration-reverse osmosis technology according to claim 1, characterized in that, The basic recovery support assessment and analysis process is as follows: The operating condition information of the infrastructure for electropolishing water cleaning within the time threshold is obtained. The infrastructure includes water supply pumps and water supply power supply. The operating condition information includes the degree of fit of operating characteristics and the depth of operating defects. The operational feature fit indicates the number of operational features that exceed the preset threshold. Operational features include operating temperature and vibration amplitude. The operational defect depth indicates the portion of the time between the start of the command control and the execution of the command that exceeds the preset time.

5. The electropolishing cleaning water acid recovery system based on nanofiltration-reverse osmosis technology according to claim 4, characterized in that, The system performs discrimination processing on the operational feature fit degree and operational defect depth: if the operational feature fit degree is less than the preset operational feature fit degree threshold and the operational defect depth is less than the preset operational defect depth threshold, the corresponding infrastructure is determined to be a stable facility. If the operational feature fit degree is greater than or equal to the preset operational feature fit degree threshold, or the operational defect depth is greater than or equal to the preset operational defect depth threshold, the corresponding infrastructure is determined to be a potential facility. The ratio between the number of potential facilities and the number of stable facilities is obtained and set as the basic support degree. The basic support degree is then processed to obtain a normal signal or a potential risk signal.

6. The electropolishing cleaning water acid recovery system based on nanofiltration-reverse osmosis technology according to claim 1, characterized in that, The dynamic evaluation and analysis process of acid recovery quality is as follows: interactive analysis is performed on basic normal signals, basic defect signals, normal signals and potential risk signals. If basic normal signals and normal signals are generated, a continuous qualified signal is obtained. If basic normal signals and potential risk signals or basic defect signals and normal signals are generated, a single interference signal is obtained. If basic defect signals and potential risk signals are generated, a double interference signal is obtained.

7. The electropolishing cleaning water acid recovery system based on nanofiltration-reverse osmosis technology according to claim 6, characterized in that, When a continuous qualified signal is generated: the recovered acid concentration of the electropolishing cleaning water within the time threshold is obtained, a characteristic curve of the recovered acid concentration of the electropolishing cleaning water is constructed based on the time series, the recovered acid concentration corresponding to the inflection point is obtained based on the characteristic curve of the recovered acid concentration, the inflection point represents the point where the recovered acid concentration changes, a set A of recovered acid concentrations is constructed, the variance value of the set is obtained, and the variance value of the set is set as the dynamic recovery balance degree, and the dynamic recovery balance degree is discriminated to obtain the dynamic balance signal or dynamic management signal.

8. A method for recovering acid from electropolishing cleaning water based on nanofiltration-reverse osmosis technology, wherein the method is applied to an acid recovery system for electropolishing cleaning water based on nanofiltration-reverse osmosis technology according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Preliminary filtration, primary nanofiltration, secondary nanofiltration, reverse osmosis concentration, and acid reuse treatment of electropolishing cleaning water; Step Two: The process of monitoring and analyzing the basic conditions of electropolishing cleaning water based on information progression; Step 3: Safety analysis of infrastructure operating conditions based on the time period of electropolishing cleaning water under information progression; Step 4: Interference classification and dynamic recovery assessment process based on information feedback.

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