A digital maintenance management system and method for nitrate wastewater recovery equipment

Abstract

This invention relates to the field of equipment maintenance management technology, specifically a digital maintenance management system and method for nitrate wastewater recovery equipment. The system's maintenance planning module acquires historical data on the maintenance cycles of each piece of equipment in the nitrate wastewater recovery production line, as well as the corresponding maintenance demand determination results. It dynamically adjusts the maintenance cycles of each piece of equipment and generates maintenance planning schemes based on the determination results of each maintenance demand. This invention uses sensors to digitally monitor the operating status of the wastewater recovery equipment, comprehensively analyzes crystallization, scaling, blockage, and operational stability, dynamically determines the maintenance needs of the wastewater recovery equipment, dynamically adjusts the equipment maintenance cycles, and generates maintenance planning schemes. This achieves unified planning of the corresponding maintenance time for each piece of equipment with maintenance needs, realizing digital and intelligent control of wastewater equipment maintenance.

Description

Technical Field

[0001] This invention relates to the field of equipment maintenance management technology, specifically to a digital maintenance management system and method for nitrate wastewater recovery equipment. Background Technology

[0002] With the rapid development of industry, the scale of chemical production is getting larger and larger, and the amount of industrial wastewater generated in the production process is increasing. If industrial wastewater is not treated, it will have a significant impact on the social environment, especially nitrate wastewater, which will pollute water bodies, affect the survival and reproduction of aquatic organisms, and thus disrupt the balance of production. Therefore, before discharging nitrate wastewater, enterprises need to use nitrate wastewater recovery equipment to recover and treat it.

[0003] Existing nitrate wastewater recovery equipment includes pH adjustment tanks, buffer tanks, shell-and-tube heat exchangers, precision filters, ceramic filters, electrodialysis equipment, reverse osmosis systems, EDI desalination systems, acid addition equipment, wastewater discharge systems, other auxiliary systems, water tanks and pumps, valves, pipes and accessories within the system, unit control equipment, local instruments and accessories, etc. However, during the nitrate wastewater recovery process, with the passage of time, crystallization, scaling and blockage will gradually occur in the nitrate wastewater recovery equipment, leading to instability in the nitrate wastewater recovery process. Therefore, regular inspection or maintenance of the nitrate wastewater recovery equipment is necessary.

[0004] Existing digital maintenance management systems for nitrate wastewater recovery equipment often pre-set fixed durations for maintenance or repair. However, due to the large number and variety of equipment involved in nitrate wastewater recovery, and the differences in usage among different types of equipment, the required maintenance or repair times also vary significantly. Consequently, the maintenance schedule for nitrate wastewater recovery equipment in existing technologies is rather chaotic, wasting the time and effort of maintenance personnel and easily leading to omissions or errors in the equipment to be inspected. Summary of the Invention

[0005] The purpose of this invention is to provide a digital maintenance management system and method for nitrate wastewater recovery equipment, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a digital maintenance and management method for nitrate wastewater recovery equipment, the method comprising the following steps:

[0007] S1. Real-time acquisition of the operating status of each piece of equipment in the nitrate wastewater recovery production line through sensors, and generation of a summary set of the operating status of the nitrate wastewater recovery production line.

[0008] S2. Based on the summary of the operating status of the nitrate wastewater recovery production line at different times, generate the status fluctuation characteristic information of each piece of equipment in the nitrate wastewater recovery production line; combine the maintenance data and fault maintenance data of each piece of equipment in the historical data to determine the maintenance needs of each piece of equipment in the nitrate wastewater recovery production line.

[0009] S3. Obtain the maintenance cycle of each piece of equipment in the nitrate wastewater recovery production line from historical data, as well as the maintenance demand judgment results of the corresponding equipment. Dynamically adjust the maintenance cycle of each piece of equipment and generate a maintenance planning scheme based on the maintenance demand judgment results.

[0010] S4. Analyze the periodic change interference value corresponding to each maintenance planning scheme based on the determination results of various maintenance needs, and take the maintenance planning scheme with the smallest periodic change interference value as the best maintenance planning scheme; adjust the equipment maintenance cycle of the corresponding equipment according to the best maintenance planning scheme, and feed back the adjusted equipment maintenance cycle to the user for review.

[0011] Furthermore, the operational status summary of the nitrate wastewater recovery production line includes operational status information for each element corresponding to a piece of equipment in the nitrate wastewater recovery production line. The operational status information includes the interval since the last maintenance, the thickness of crystals on the inner wall of the equipment, the types of ions in the input and output wastewater, and the concentration of the corresponding ions.

[0012] Furthermore, each device corresponds to a status fluctuation characteristic information, which includes the interval since the most recent maintenance, a first concentration fluctuation value and a second concentration fluctuation value for each ion species in the wastewater output by the device; the first concentration fluctuation value represents the absolute value of the difference between the ion concentration of the corresponding ion species in the wastewater output by the corresponding device at the current time and the ion concentration after the most recent maintenance; the second concentration fluctuation value represents the absolute value of the difference between the ion concentration of the corresponding ion species in the wastewater input by the corresponding device and the wastewater output by the corresponding device.

[0013] The construction of equipment operating status information and corresponding status fluctuation characteristic information in this invention is to comprehensively analyze crystallization, scaling, blockage, and operational stability, and to provide data support for the dynamic determination of maintenance needs in wastewater recycling equipment in subsequent steps.

[0014] The method for determining the maintenance needs of various equipment in the nitrate wastewater recovery production line includes the following steps:

[0015] S21. Obtain the status fluctuation characteristics of each piece of equipment in the nitrate wastewater recovery production line at the current time, as well as the summary set of the operating status of the nitrate wastewater recovery production line at the current time.

[0016] S22. Obtain the maintenance and fault repair data of each device from the historical data;

[0017] S23. Calculate the maintenance requirement assessment value corresponding to the i-th piece of equipment in the nitrate wastewater recovery production line. The calculation formula is as follows:

[0018] F i =1-(1-TL) i / TLP i )·(1-max{PF i PS i})·(1-B i )

[0019] Among them, F i This represents the estimated maintenance requirement value for the i-th piece of equipment in the nitrate wastewater recovery production line; TL i This represents the interval between the most recent maintenance time and the status fluctuation characteristics of the i-th device in the nitrate wastewater recovery production line; CF i This represents the maximum value of the first concentration fluctuation value corresponding to each ion type in the output wastewater of the i-th device in the nitrate wastewater recovery production line; CS i TLP represents the maximum value of the second concentration fluctuation value corresponding to each ion species in the output wastewater of the i-th device in the state fluctuation characteristic information of the device. i PF represents the average interval between two consecutive maintenance or fault maintenance times within the maintenance and fault repair data of the i-th device in historical data; i This refers to the maintenance and fault repair data of the i-th device in the historical data, where the data is related to CF during maintenance or fault repair. i The first concentration fluctuation value corresponding to the same ion species and CF i The ratio of the total number of times the deviation between the two data points is less than a preset deviation value to the total number of maintenance and repairs for the i-th device in the historical data; the total number of maintenance and repairs for the i-th device in the historical data is greater than 0; the deviation is the absolute value of the difference between the corresponding two data points; PS i This represents the maintenance and fault repair data of the i-th device in the historical data, where the data is related to CS during maintenance or fault repair. i The second concentration fluctuation value corresponding to the same ion species and CS i The ratio of the total number of times the deviation between the two values ​​is less than the preset deviation value to the total number of maintenance and fault repairs of the i-th device in the historical data; B iThis represents the ratio of the total number of times in the historical data of the maintenance and fault maintenance data of the i-th equipment that the crystallization thickness of the inner wall of the equipment during maintenance or fault maintenance is greater than or equal to the crystallization thickness of the inner wall of the i-th equipment in the current time's corresponding operating status information of the nitrate wastewater recovery production line, to the total number of maintenance and fault maintenance times of the i-th equipment in the historical data.

[0020] S24. Obtain the maintenance requirement determination results for each piece of equipment in the nitrate wastewater recovery production line. Determine that the maintenance requirement determination results for all equipment in the nitrate wastewater recovery production line whose corresponding maintenance requirement assessment value is greater than or equal to the preset value are that there is a maintenance requirement; otherwise, determine that the maintenance requirement determination results for the corresponding equipment are that there is no maintenance requirement.

[0021] In this invention, during the process of determining the maintenance needs of each piece of equipment in the nitrate wastewater recovery production line, the status fluctuation characteristics of each piece of equipment in the nitrate wastewater recovery production line at the current time are taken into account, as well as the summary set of the operating status of the nitrate wastewater recovery production line at the current time. The obtained parameters are compared and analyzed with the maintenance data and fault maintenance data of each piece of equipment in historical data, so as to achieve accurate prediction of the maintenance needs of each piece of equipment in the nitrate wastewater recovery production line and provide data reference for generating maintenance planning schemes in subsequent steps.

[0022] Furthermore, the method for generating a maintenance planning scheme based on the determination results of various maintenance needs includes the following steps:

[0023] S31. Obtain the maintenance cycle corresponding to each piece of equipment in the nitrate wastewater recovery production line within the historical data. Record the most recent maintenance cycle corresponding to the i-th piece of equipment in the nitrate wastewater recovery production line within the historical data as T. i Let TR be the interval formed by the maximum and minimum values ​​of the i-th equipment in the nitrate wastewater recovery production line during each maintenance cycle within the historical data. i ;

[0024] S32. Obtain the set of all equipment whose corresponding maintenance requirement determination results are that they have maintenance requirements, and denote it as the equipment maintenance requirement set.

[0025] S33. Obtain the preset maintenance time point corresponding to each element in the equipment maintenance demand set, and denote the set consisting of the preset maintenance time point corresponding to each element in the equipment maintenance demand set and the reference time point corresponding to the equipment maintenance demand set as the alternative reference maintenance time set; the preset maintenance time point corresponding to the i-th equipment in the nitrate wastewater recovery production line is equal to the time of the most recent maintenance or fault repair of the i-th equipment in the nitrate wastewater recovery production line and T. iThe sum of the corresponding time points; the reference time point corresponding to the equipment maintenance requirement set is the minimum sum of the deviations between the maximum and minimum values ​​of the preset maintenance time points corresponding to the elements in the equipment maintenance requirement set and the preset maintenance time point corresponding to each element.

[0026] S34. Obtain the preset maintenance fluctuation time interval corresponding to each element in the equipment maintenance demand set, and generate a maintenance planning time set based on the equipment maintenance demand set; the preset maintenance fluctuation time interval corresponding to the i-th equipment in the nitrate wastewater recovery production line is the time of the most recent maintenance or fault maintenance of the i-th equipment in the nitrate wastewater recovery production line, which is respectively compared with TR i The maximum and minimum values ​​are added together to form the time interval; if the intersection of the preset maintenance fluctuation time intervals corresponding to each element in the equipment maintenance demand set is not an empty set, then the maintenance planning time set based on the equipment maintenance demand set is determined to be the obtained intersection; if the intersection of the preset maintenance fluctuation time intervals corresponding to each element in the equipment maintenance demand set is an empty set, then the maintenance planning time set based on the equipment maintenance demand set is determined to be the preset maintenance fluctuation time interval containing the minimum time point and having the shortest interval length among the preset maintenance fluctuation time intervals.

[0027] S35. Lock the maintenance planning time adjustment point set; if the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is not empty, then the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is taken as the maintenance planning time adjustment point set; if the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is empty, then the set of time points in the alternative reference maintenance time set that have the shortest interval with any time point in the maintenance planning time set based on the equipment maintenance demand set is taken as the maintenance planning time adjustment point set.

[0028] S36. Generate maintenance planning schemes based on the results of each maintenance judgment requirement. The maintenance planning scheme based on the results of each maintenance judgment requirement corresponds to an element in the set of locked maintenance planning time adjustment points. The maintenance cycle of each piece of equipment in each maintenance planning scheme after dynamic adjustment is equal to the interval between the element corresponding to the maintenance planning scheme in the set of maintenance planning time adjustment points and the time of the most recent maintenance or fault maintenance of the corresponding equipment.

[0029] Furthermore, in the analysis of maintenance planning schemes based on the determination results of various maintenance needs, the calculation formula for the periodic change interference value corresponding to each maintenance planning scheme is as follows:

[0030]

[0031] Among them, GM kF represents the periodic change interference value corresponding to the k-th maintenance planning scheme among the maintenance planning schemes based on the determination results of various maintenance needs; (j，k) This represents the maintenance requirement assessment value corresponding to the j-th equipment in the k-th maintenance planning scheme; j1 represents the number of equipment in the k-th maintenance planning scheme; TMA (j，k) TMB represents the dynamically adjusted maintenance cycle of the j-th equipment in the k-th maintenance plan; (j，k) This represents the equipment maintenance cycle before the dynamic adjustment of the j-th equipment in the k-th maintenance plan; FTA (j，k) This indicates that in the k-th maintenance plan, the j-th device's time since its most recent maintenance or fault repair in historical data is equal to the TMA (Time to Repair). (j，k) The average value of each maintenance requirement assessment corresponding to each time; FTB (j，k) This indicates that in the k-th maintenance plan, the j-th device's time since its most recent maintenance or fault repair in historical data is equal to TMB. (j，k) The average value of each maintenance requirement assessment value corresponding to each time.

[0032] Furthermore, in the process of adjusting the equipment maintenance cycle of the corresponding equipment according to the optimal maintenance plan, the equipment corresponding to each element in the optimal maintenance plan and the corresponding equipment maintenance cycle are obtained; and the obtained equipment maintenance cycle replaces the original equipment maintenance cycle of the corresponding equipment in the database; the most recent maintenance time of each equipment in the database is obtained, and the next maintenance time corresponding to each equipment in the database is obtained. The next maintenance time corresponding to each equipment is equal to the time point corresponding to the sum of the most recent maintenance time of the corresponding equipment and the adjusted equipment maintenance cycle of the corresponding equipment; when the next maintenance time in the database is reached, the set of all the equipment to be maintained corresponding to the time point is fed back as maintenance early warning information to the corresponding maintenance personnel.

[0033] During the user's review of the adjusted equipment maintenance cycle, if the user approves, the equipment maintenance cycle adjustment is considered successful; if the user fails to approve, the equipment maintenance cycle adjustment result is rolled back, returning to the equipment maintenance cycle before the adjustment in the optimal maintenance plan.

[0034] A digital maintenance and management system for nitrate wastewater recovery equipment, the system comprising the following modules:

[0035] The status acquisition and summary module acquires the operating status of each device in the nitrate wastewater recovery production line in real time through sensors and generates a summary set of the operating status of the nitrate wastewater recovery production line.

[0036] The maintenance requirement analysis module generates status fluctuation characteristic information for each piece of equipment in the nitrate wastewater recovery production line based on the summary of the operating status of the nitrate wastewater recovery production line at different times; and determines the maintenance requirement for each piece of equipment in the nitrate wastewater recovery production line by combining the maintenance data and fault maintenance data of each piece of equipment in the historical data.

[0037] The maintenance planning scheme generation module obtains the maintenance cycle corresponding to each piece of equipment in the nitrate wastewater recovery production line from historical data, as well as the maintenance demand judgment results corresponding to the corresponding equipment, dynamically adjusts the maintenance cycle of each piece of equipment, and generates a maintenance planning scheme based on the maintenance demand judgment results of each piece of equipment.

[0038] The equipment maintenance management module analyzes the periodic change interference value of each maintenance planning scheme based on the determination results of various maintenance needs, and selects the maintenance planning scheme with the smallest periodic change interference value as the optimal maintenance planning scheme. The module then adjusts the equipment maintenance cycle of the corresponding equipment according to the optimal maintenance planning scheme and provides the adjusted equipment maintenance cycle to the user for review.

[0039] Furthermore, the maintenance requirement analysis module includes a fluctuation characteristic analysis unit and a maintenance requirement determination unit.

[0040] The fluctuation characteristic analysis unit generates state fluctuation characteristic information for each piece of equipment in the nitrate wastewater recovery production line based on the summary of the operating status of the nitrate wastewater recovery production line at different times.

[0041] The maintenance requirement determination unit combines the maintenance data and fault maintenance data of each equipment in the historical data to determine the maintenance requirements of each piece of equipment in the nitrate wastewater recovery production line.

[0042] Furthermore, the equipment maintenance management module includes a dynamic screening unit for maintenance planning schemes and a maintenance cycle adjustment and feedback unit.

[0043] The dynamic screening unit for maintenance planning schemes analyzes the periodic change interference value of each maintenance planning scheme based on the determination results of each maintenance need, and selects the maintenance planning scheme with the smallest periodic change interference value as the best maintenance planning scheme.

[0044] The maintenance cycle adjustment and feedback unit adjusts the maintenance cycle of the corresponding equipment according to the optimal maintenance plan, and feeds back the adjusted maintenance cycle to the user for review.

[0045] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the process of digital maintenance management of nitrate wastewater recovery equipment, the present invention realizes digital monitoring of the operating status of wastewater recovery equipment through sensors, combines historical maintenance data and fault data, conducts comprehensive analysis of crystallization, scaling and blockage and operational stability, realizes dynamic determination of maintenance needs in wastewater recovery equipment, dynamically adjusts equipment maintenance cycles, and generates maintenance planning schemes, so as to achieve unified planning of the corresponding maintenance time for each piece of equipment with maintenance needs, and realizes digital and intelligent control of wastewater equipment maintenance. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0047] Figure 1 This is a schematic diagram of the structure of a digital maintenance management system for nitrate wastewater recovery equipment according to the present invention;

[0048] Figure 2 This is a flowchart illustrating a digital maintenance management method for nitrate wastewater recovery equipment according to the present invention. Detailed Implementation

[0049] 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.

[0050] Please see Figure 1 The present invention provides a technical solution: a digital maintenance and management system for nitrate wastewater recovery equipment, the system comprising the following modules:

[0051] The status acquisition and summary module acquires the operating status of each device in the nitrate wastewater recovery production line in real time through sensors and generates a summary set of the operating status of the nitrate wastewater recovery production line.

[0052] The maintenance requirement analysis module includes a fluctuation characteristic analysis unit and a maintenance requirement determination unit.

[0053] The fluctuation characteristic analysis unit generates state fluctuation characteristic information for each piece of equipment in the nitrate wastewater recovery production line based on the summary of the operating status of the nitrate wastewater recovery production line at different times.

[0054] The maintenance requirement determination unit combines the maintenance data and fault maintenance data of each equipment in the historical data to determine the maintenance requirements of each equipment in the nitrate wastewater recovery production line.

[0055] The maintenance planning scheme generation module obtains the maintenance cycle corresponding to each piece of equipment in the nitrate wastewater recovery production line from historical data, as well as the maintenance demand judgment results corresponding to the corresponding equipment, dynamically adjusts the maintenance cycle of each piece of equipment, and generates a maintenance planning scheme based on the maintenance demand judgment results of each piece of equipment.

[0056] The equipment maintenance management module includes a dynamic screening unit for maintenance planning schemes and a maintenance cycle adjustment and feedback unit.

[0057] The dynamic screening unit for maintenance planning schemes analyzes the periodic change interference value of each maintenance planning scheme based on the determination results of each maintenance need, and selects the maintenance planning scheme with the smallest periodic change interference value as the best maintenance planning scheme.

[0058] The maintenance cycle adjustment and feedback unit adjusts the maintenance cycle of the corresponding equipment according to the optimal maintenance plan, and feeds back the adjusted maintenance cycle to the user for review.

[0059] This embodiment of the nitrate wastewater recovery equipment includes two 30t / h pH adjustment tank units, one 30t / h buffer tank unit, one 30t / h acid addition unit, two 15t / h shell-and-tube heat exchanger units, four 30t / h precision filter units, two 30t / h ceramic filter units, one 30t / h ED concentration unit, one 30t / h ED desalination unit, and one 36t / h reverse osmosis unit (including a security filter, high-pressure pump, reverse osmosis device, internal piping, valves, and accessories). Instruments, instrument conduits, gas supply pipes, instrument valves and gas supply valves, solenoid valve boxes, power cabinets, programmable control cabinets, and cables and wiring from cabinets to local instrument control equipment within the scope of supply, etc.), 1 set of 31t / h electrodialysis complete set of equipment, 1 20m3 electrodialysis raw water tank, 1 20m3 electrodialysis concentrate tank, 1 20m3 electrodialysis desalination raw water tank, 1 20m3 electrodialysis desalination concentrate tank, 1 15m3 electrodialysis desalination electrode water tank, 1 30m3 reverse osmosis feed water tank, 1 30m3 reverse osmosis product water tank (EDI feed water tank), 1 30m3 EDI product water tank (desalinated water tank);

[0060] This embodiment also includes all local indicating instruments (pressure gauges, local liquid level indicators for containers) and all instruments and control devices such as heat exchangers, dosing devices, and ED devices (including instruments, instrument conduits, gas supply pipes, instrument valves and gas supply valves and accessories, control devices, and cables and wiring from cabinets to local instrument control equipment within the scope of supply).

[0061] In this embodiment, during the nitrate wastewater recovery process, as the usage time increases, nitrate crystals or other scaling substances will adhere to the equipment, which may hinder the nitrate wastewater recovery efficiency. This is especially true for reverse osmosis devices and electrodialysis concentration devices, which are more severely affected by crystallization and scaling blockage.

[0062] like Figure 2 As shown, a digital maintenance management method for nitrate wastewater recovery equipment includes the following steps:

[0063] S1. Real-time acquisition of the operating status of each piece of equipment in the nitrate wastewater recovery production line through sensors, and generation of a summary set of the operating status of the nitrate wastewater recovery production line.

[0064] The summary of the nitrate wastewater recovery production line operation status includes the operation status information of one piece of equipment in the corresponding nitrate wastewater recovery production line for each element. The operation status information includes the interval since the last maintenance, the crystal thickness of the inner wall of the equipment, the types of ions in the input wastewater and output wastewater of the equipment, and the concentration of the corresponding ions.

[0065] S2. Based on the summary of the operating status of the nitrate wastewater recovery production line at different times, generate the status fluctuation characteristic information of each piece of equipment in the nitrate wastewater recovery production line; combine the maintenance data and fault maintenance data of each piece of equipment in the historical data to determine the maintenance needs of each piece of equipment in the nitrate wastewater recovery production line.

[0066] Each device corresponds to a status fluctuation characteristic information, which includes the interval since the most recent maintenance, a first concentration fluctuation value and a second concentration fluctuation value for each ion species in the wastewater output by the device; the first concentration fluctuation value represents the absolute value of the difference between the ion concentration of the corresponding ion species in the wastewater output by the corresponding device at the current time and the ion concentration after the most recent maintenance; the second concentration fluctuation value represents the absolute value of the difference between the ion concentration of the corresponding ion species in the wastewater input by the corresponding device and the wastewater output by the corresponding device.

[0067] The method for determining the maintenance needs of various equipment in the nitrate wastewater recovery production line includes the following steps:

[0068] S21. Obtain the status fluctuation characteristics of each piece of equipment in the nitrate wastewater recovery production line at the current time, as well as the summary set of the operating status of the nitrate wastewater recovery production line at the current time.

[0069] S22. Obtain the maintenance and fault repair data of each device from the historical data;

[0070] S23. Calculate the maintenance requirement assessment value corresponding to the i-th piece of equipment in the nitrate wastewater recovery production line. The calculation formula is as follows:

[0071] F i =1-(1-TL) i / TLP i )·(1-max{PF i PS i})·(1-B i )

[0072] Among them, F i This represents the estimated maintenance requirement value for the i-th piece of equipment in the nitrate wastewater recovery production line; TL i This represents the interval between the most recent maintenance time and the status fluctuation characteristics of the i-th device in the nitrate wastewater recovery production line; CF i This represents the maximum value of the first concentration fluctuation value corresponding to each ion type in the output wastewater of the i-th device in the nitrate wastewater recovery production line; CS i TLP represents the maximum value of the second concentration fluctuation value corresponding to each ion species in the output wastewater of the i-th device in the state fluctuation characteristic information of the device. i PF represents the average interval between two consecutive maintenance or fault maintenance times within the maintenance and fault repair data of the i-th device in historical data; i This refers to the maintenance and fault repair data of the i-th device in the historical data, where the data is related to CF during maintenance or fault repair. i The first concentration fluctuation value corresponding to the same ion species and CF i The ratio of the total number of times the deviation between the two data points is less than a preset deviation value to the total number of maintenance and repairs for the i-th device in the historical data; the total number of maintenance and repairs for the i-th device in the historical data is greater than 0; the deviation is the absolute value of the difference between the corresponding two data points; PS i This represents the maintenance and fault repair data of the i-th device in the historical data, where the data is related to CS during maintenance or fault repair. i The second concentration fluctuation value corresponding to the same ion species and CS i The ratio of the total number of times the deviation between the two values ​​is less than the preset deviation value to the total number of maintenance and fault repairs of the i-th device in the historical data; B iThis represents the ratio of the total number of times in the historical data of the maintenance and fault maintenance data of the i-th equipment that the crystallization thickness of the inner wall of the equipment during maintenance or fault maintenance is greater than or equal to the crystallization thickness of the inner wall of the i-th equipment in the current time's corresponding operating status information of the nitrate wastewater recovery production line, to the total number of maintenance and fault maintenance times of the i-th equipment in the historical data.

[0073] S24. Obtain the maintenance requirement determination results for each piece of equipment in the nitrate wastewater recovery production line. Determine that the maintenance requirement determination results for all equipment in the nitrate wastewater recovery production line whose corresponding maintenance requirement assessment value is greater than or equal to the preset value are that there is a maintenance requirement; otherwise, determine that the maintenance requirement determination results for the corresponding equipment are that there is no maintenance requirement.

[0074] S3. Obtain the maintenance cycle of each piece of equipment in the nitrate wastewater recovery production line from historical data, as well as the maintenance demand judgment results of the corresponding equipment. Dynamically adjust the maintenance cycle of each piece of equipment and generate a maintenance planning scheme based on the maintenance demand judgment results.

[0075] The method for generating maintenance planning schemes based on the determination results of various maintenance needs includes the following steps:

[0076] S31. Obtain the maintenance cycle corresponding to each piece of equipment in the nitrate wastewater recovery production line within the historical data. Record the most recent maintenance cycle corresponding to the i-th piece of equipment in the nitrate wastewater recovery production line within the historical data as T. i Let TR be the interval formed by the maximum and minimum values ​​of the i-th equipment in the nitrate wastewater recovery production line during each maintenance cycle within the historical data. i ;

[0077] S32. Obtain the set of all equipment whose corresponding maintenance requirement determination results are that they have maintenance requirements, and denote it as the equipment maintenance requirement set.

[0078] S33. Obtain the preset maintenance time point corresponding to each element in the equipment maintenance demand set, and denote the set consisting of the preset maintenance time point corresponding to each element in the equipment maintenance demand set and the reference time point corresponding to the equipment maintenance demand set as the alternative reference maintenance time set; the preset maintenance time point corresponding to the i-th equipment in the nitrate wastewater recovery production line is equal to the time of the most recent maintenance or fault repair of the i-th equipment in the nitrate wastewater recovery production line and T. i The sum of the corresponding time points; the reference time point corresponding to the equipment maintenance requirement set is the minimum sum of the deviations between the maximum and minimum values ​​of the preset maintenance time points corresponding to the elements in the equipment maintenance requirement set and the preset maintenance time point corresponding to each element.

[0079] S34. Obtain the preset maintenance fluctuation time interval corresponding to each element in the equipment maintenance demand set, and generate a maintenance planning time set based on the equipment maintenance demand set; the preset maintenance fluctuation time interval corresponding to the i-th equipment in the nitrate wastewater recovery production line is the time of the most recent maintenance or fault maintenance of the i-th equipment in the nitrate wastewater recovery production line, which is respectively compared with TR i The maximum and minimum values ​​are added together to form the time interval; if the intersection of the preset maintenance fluctuation time intervals corresponding to each element in the equipment maintenance demand set is not an empty set, then the maintenance planning time set based on the equipment maintenance demand set is determined to be the obtained intersection; if the intersection of the preset maintenance fluctuation time intervals corresponding to each element in the equipment maintenance demand set is an empty set, then the maintenance planning time set based on the equipment maintenance demand set is determined to be the preset maintenance fluctuation time interval containing the minimum time point and having the shortest interval length among the preset maintenance fluctuation time intervals.

[0080] S35. Lock the maintenance planning time adjustment point set; if the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is not empty, then the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is taken as the maintenance planning time adjustment point set; if the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is empty, then the set of time points in the alternative reference maintenance time set that have the shortest interval with any time point in the maintenance planning time set based on the equipment maintenance demand set is taken as the maintenance planning time adjustment point set.

[0081] S36. Generate maintenance planning schemes based on the results of each maintenance judgment requirement. The maintenance planning scheme based on the results of each maintenance judgment requirement corresponds to an element in the set of locked maintenance planning time adjustment points. The maintenance cycle of each piece of equipment in each maintenance planning scheme after dynamic adjustment is equal to the interval between the element corresponding to the maintenance planning scheme in the set of maintenance planning time adjustment points and the time of the most recent maintenance or fault maintenance of the corresponding equipment.

[0082] S4. Analyze the periodic change interference value of each maintenance planning scheme based on the results of various maintenance needs determination, and take the maintenance planning scheme with the smallest periodic change interference value as the best maintenance planning scheme; adjust the equipment maintenance cycle of the corresponding equipment according to the best maintenance planning scheme, and feed back the adjusted equipment maintenance cycle to the user for review.

[0083] The analysis of maintenance planning schemes based on the determination results of various maintenance needs, and the calculation formula for the periodic change interference value corresponding to each maintenance planning scheme, is as follows:

[0084]

[0085] Among them, GM k F represents the periodic change interference value corresponding to the k-th maintenance planning scheme among the maintenance planning schemes based on the determination results of various maintenance needs; (j，k) This represents the maintenance requirement assessment value corresponding to the j-th equipment in the k-th maintenance planning scheme; j1 represents the number of equipment in the k-th maintenance planning scheme; TMA (j，k) TMB represents the dynamically adjusted maintenance cycle of the j-th equipment in the k-th maintenance plan; (j，k) This represents the equipment maintenance cycle before the dynamic adjustment of the j-th equipment in the k-th maintenance plan; FTA (j，k) This indicates that in the k-th maintenance plan, the j-th device's time since its most recent maintenance or fault repair in historical data is equal to the TMA (Time to Repair). (j，k) The average value of each maintenance requirement assessment corresponding to each time; FTB (j，k) This indicates that in the k-th maintenance plan, the j-th device's time since its most recent maintenance or fault repair in historical data is equal to TMB. (j，k) The average value of each maintenance requirement assessment value corresponding to each time.

[0086] In the process of adjusting the equipment maintenance cycle of the corresponding equipment according to the optimal maintenance plan, the equipment corresponding to each element in the optimal maintenance plan and the corresponding equipment maintenance cycle are obtained; and the obtained equipment maintenance cycle replaces the original equipment maintenance cycle of the corresponding equipment in the database; the most recent maintenance time of each equipment in the database is obtained, and the next maintenance time corresponding to each equipment in the database is obtained. The next maintenance time corresponding to each equipment is equal to the time point corresponding to the sum of the most recent maintenance time of the corresponding equipment and the adjusted equipment maintenance cycle of the corresponding equipment; when the next maintenance time in the database is reached, the set of all the equipment to be maintained corresponding to the time point is fed back as maintenance early warning information to the corresponding maintenance personnel.

[0087] During the user's review of the adjusted equipment maintenance cycle, if the user approves, the equipment maintenance cycle adjustment is considered successful; if the user fails to approve, the equipment maintenance cycle adjustment result is rolled back, returning to the equipment maintenance cycle before the adjustment in the optimal maintenance plan.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0089] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A digital maintenance management method for nitrate wastewater recovery equipment, characterized in that, The method includes the following steps: S1. Real-time acquisition of the operating status of each piece of equipment in the nitrate wastewater recovery production line through sensors, and generation of a summary set of the operating status of the nitrate wastewater recovery production line. S2. Based on the summary of the nitrate wastewater recovery production line's operating status at different times, generate the status fluctuation characteristic information corresponding to each piece of equipment in the nitrate wastewater recovery production line; combine the maintenance data and fault maintenance data of each piece of equipment in the historical data to determine the maintenance needs of each piece of equipment in the nitrate wastewater recovery production line; wherein, each element in the summary of the nitrate wastewater recovery production line's operating status corresponds to the operating status information of one piece of equipment in the corresponding nitrate wastewater recovery production line, and the operating status information includes the interval time since the most recent maintenance, the crystal thickness of the inner wall of the equipment, the types of ions in the input wastewater and output wastewater of the equipment, and the concentration of the corresponding ions; S3. Obtain the maintenance cycle of each piece of equipment in the nitrate wastewater recovery production line from historical data, as well as the maintenance demand judgment results of the corresponding equipment. Dynamically adjust the maintenance cycle of each piece of equipment and generate a maintenance planning scheme based on the maintenance demand judgment results. S4. Analyze the periodic change interference value of each maintenance planning scheme based on the results of various maintenance needs determination, and take the maintenance planning scheme with the smallest periodic change interference value as the best maintenance planning scheme; adjust the equipment maintenance cycle of the corresponding equipment according to the best maintenance planning scheme, and feed back the adjusted equipment maintenance cycle to the user for review. The analysis of maintenance planning schemes based on the determination results of various maintenance needs, and the calculation formula for the periodic change interference value corresponding to each maintenance planning scheme, is as follows: ; in, GM k This represents the maintenance planning scheme based on the results of various maintenance needs assessments. k The periodic change interference value corresponding to each maintenance plan scheme; F （j，k） Indicates the first k The first maintenance plan j The maintenance requirements assessment value for each piece of equipment; j1 Indicates the first k The number of equipment in each maintenance plan; TMA （j，k） Indicates the first k The first maintenance plan j The equipment maintenance cycle is dynamically adjusted for each piece of equipment. TMB （j，k） Indicates the first k The first maintenance plan j The equipment maintenance cycle before dynamic adjustment of each piece of equipment. FTA （j，k） Indicates the first k The first maintenance plan j In historical data, the time since the last maintenance or fault repair for each device is equal to... TMA （j，k） The average value of each maintenance requirement assessment value corresponding to each time; FTB （j，k） Indicates the first k The first maintenance plan j In historical data, the time since the last maintenance or fault repair for each device is equal to... TMB （j，k） The average value of each maintenance requirement assessment value corresponding to each time.

2. The digital maintenance management method for nitrate wastewater recovery equipment according to claim 1, characterized in that: Each device corresponds to a status fluctuation characteristic information, which includes the interval since the most recent maintenance, a first concentration fluctuation value and a second concentration fluctuation value for each ion species in the wastewater output by the device; the first concentration fluctuation value represents the absolute value of the difference between the ion concentration of the corresponding ion species in the wastewater output by the corresponding device at the current time and the ion concentration after the most recent maintenance; the second concentration fluctuation value represents the absolute value of the difference between the ion concentration of the corresponding ion species in the wastewater input by the corresponding device and the wastewater output by the corresponding device. The method for determining the maintenance needs of various equipment in the nitrate wastewater recovery production line includes the following steps: S21. Obtain the status fluctuation characteristics of each piece of equipment in the nitrate wastewater recovery production line at the current time, as well as the summary set of the operating status of the nitrate wastewater recovery production line at the current time. S22. Obtain the maintenance and fault repair data of each device from the historical data; S23, Calculate the first step in the nitrate wastewater recovery production line. i The assessment value of maintenance requirements for each piece of equipment is calculated using the following formula: ; in, F i This indicates the first step in the nitrate wastewater recovery production line. i The maintenance requirements assessment value for each piece of equipment; TL i This indicates the first step in the nitrate wastewater recovery production line. i The interval between the most recent maintenance time and the status fluctuation characteristic information of each device; CF i This indicates the first step in the nitrate wastewater recovery production line. i The maximum value of the first concentration fluctuation value corresponding to each type of ion in the wastewater output by the device in the state fluctuation characteristic information of each device; CS i This indicates the first step in the nitrate wastewater recovery production line. i The maximum value of the second concentration fluctuation value corresponding to each type of ion in the wastewater output by the device in the state fluctuation characteristic information of each device; TLP i Indicates the first in historical data i The average duration of the interval between two consecutive maintenance or fault maintenance times within the maintenance and fault maintenance data of each device. PF i Indicates the first in historical data i Within the maintenance and fault repair data of each device, during maintenance or fault repair, and... CF i The first concentration fluctuation value corresponding to the same ion type and CF i The total number of times the deviation between the two values ​​was less than the preset deviation value accounts for the % of the historical data. i The ratio of the total number of inspections and fault maintenance for each piece of equipment; the historical data of the first... i The total number of inspections and maintenance for each device is greater than 0; the deviation is the absolute value of the difference between the corresponding two data points. PS i Indicates the first in historical data i Within the maintenance and fault repair data of each device, during maintenance or fault repair, and... CS i The second concentration fluctuation value corresponding to the same ion type and CS i The total number of times the deviation between the two values ​​was less than the preset deviation value accounts for the % of the historical data. i The ratio of the total number of inspections and fault maintenance for each piece of equipment; B i Indicates the first in historical data i Within the maintenance and fault repair data of each piece of equipment, the crystal thickness on the inner wall of the equipment during maintenance or fault repair is greater than or equal to the thickness of the crystal on the inner wall of the nitrate wastewater recovery production line at the current time. i The total number of times the crystallization thickness of the inner wall of the equipment is recorded in the corresponding operating status information of each equipment accounts for the first percentage of historical data. i The ratio of the total number of inspections and fault maintenance for each piece of equipment; S24. Obtain the maintenance requirement determination results for each piece of equipment in the nitrate wastewater recovery production line. Determine that the maintenance requirement determination results for all equipment in the nitrate wastewater recovery production line whose corresponding maintenance requirement assessment value is greater than or equal to the preset value are that there is a maintenance requirement; otherwise, determine that the maintenance requirement determination results for the corresponding equipment are that there is no maintenance requirement.

3. The digital maintenance management method for nitrate wastewater recovery equipment according to claim 2, characterized in that: The method for generating maintenance planning schemes based on the determination results of various maintenance needs includes the following steps: S31. Obtain the maintenance cycle corresponding to each piece of equipment in the nitrate wastewater recovery production line from the historical data. i The most recent maintenance cycle for each piece of equipment is denoted as . T i The first nitrate wastewater recovery production line in the historical data i The interval formed by the maximum and minimum values ​​of each piece of equipment in each maintenance cycle is denoted as . TR i ; S32. Obtain the set of all equipment whose corresponding maintenance requirement determination results are that they have maintenance requirements, and denote it as the equipment maintenance requirement set. S33. Obtain the preset maintenance time point corresponding to each element in the equipment maintenance requirement set, and denote the set consisting of the preset maintenance time point corresponding to each element in the equipment maintenance requirement set and the reference time point corresponding to the equipment maintenance requirement set as the alternative reference maintenance time set; in the nitrate wastewater recovery production line... i The preset maintenance time point for each piece of equipment is equal to the [number]th [item] in the nitrate wastewater recovery production line. i The time of the most recent maintenance or malfunction repair of the equipment and T i The sum of the corresponding time points; the reference time point corresponding to the equipment maintenance requirement set is the minimum sum of the deviations between the maximum and minimum values ​​of the preset maintenance time points corresponding to the elements in the equipment maintenance requirement set and the preset maintenance time point corresponding to each element. S34. Obtain the preset maintenance fluctuation time interval corresponding to each element in the equipment maintenance demand set, and generate a maintenance planning time set based on the equipment maintenance demand set; in the nitrate wastewater recovery production line... i The preset maintenance fluctuation time interval for each piece of equipment is the [number]th [time range] in the nitrate wastewater recovery production line. i The time of the most recent maintenance or fault repair for each piece of equipment is respectively... TR i The maximum and minimum values ​​are added together to form the time interval; if the intersection of the preset maintenance fluctuation time intervals corresponding to each element in the equipment maintenance demand set is not an empty set, then the maintenance planning time set based on the equipment maintenance demand set is determined to be the obtained intersection; if the intersection of the preset maintenance fluctuation time intervals corresponding to each element in the equipment maintenance demand set is an empty set, then the maintenance planning time set based on the equipment maintenance demand set is determined to be the preset maintenance fluctuation time interval containing the minimum time point and having the shortest interval length among the preset maintenance fluctuation time intervals. S35. Lock the maintenance planning time adjustment point set; if the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is not empty, then the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is taken as the maintenance planning time adjustment point set; if the intersection of the maintenance planning time set based on the equipment maintenance demand set and the alternative reference maintenance time set is empty, then the set of time points in the alternative reference maintenance time set that have the shortest interval with any time point in the maintenance planning time set based on the equipment maintenance demand set is taken as the maintenance planning time adjustment point set. S36. Generate maintenance planning schemes based on the results of each maintenance judgment requirement. The maintenance planning scheme based on the results of each maintenance judgment requirement corresponds to an element in the set of locked maintenance planning time adjustment points. The maintenance cycle of each piece of equipment in each maintenance planning scheme after dynamic adjustment is equal to the interval between the element corresponding to the maintenance planning scheme in the set of maintenance planning time adjustment points and the time of the most recent maintenance or fault maintenance of the corresponding equipment.

4. The digital maintenance management method for nitrate wastewater recovery equipment according to claim 1, characterized in that: In the process of adjusting the equipment maintenance cycle of the corresponding equipment according to the optimal maintenance plan, the equipment corresponding to each element in the optimal maintenance plan and the corresponding equipment maintenance cycle are obtained; and the obtained equipment maintenance cycle replaces the original equipment maintenance cycle of the corresponding equipment in the database; the most recent maintenance time of each equipment in the database is obtained, and the next maintenance time corresponding to each equipment in the database is obtained. The next maintenance time corresponding to each equipment is equal to the time point corresponding to the sum of the most recent maintenance time of the corresponding equipment and the adjusted equipment maintenance cycle of the corresponding equipment; when the next maintenance time in the database is reached, the set of all the equipment to be maintained corresponding to the time point is fed back as maintenance early warning information to the corresponding maintenance personnel. If the user approves the adjusted equipment maintenance cycle, the equipment maintenance cycle adjustment is considered successful. If the user's review fails, the equipment maintenance cycle adjustment results will be rolled back, returning to the equipment maintenance cycle before the adjustment in the optimal maintenance plan.

5. A digital maintenance and management system for nitrate wastewater recovery equipment, characterized in that, The system includes the following modules: The status acquisition and aggregation module acquires the operating status of each piece of equipment in the nitrate wastewater recovery production line in real time through sensors, and generates a summary set of the operating status of the nitrate wastewater recovery production line. Each element in the summary set corresponds to the operating status information of one piece of equipment in the nitrate wastewater recovery production line. The operating status information includes the interval since the last maintenance, the thickness of crystals on the inner wall of the equipment, the types of ions in the input wastewater and output wastewater, and the concentration of the corresponding ions. The maintenance requirement analysis module generates status fluctuation characteristic information for each piece of equipment in the nitrate wastewater recovery production line based on the summary of the operating status of the nitrate wastewater recovery production line at different times; and determines the maintenance requirement for each piece of equipment in the nitrate wastewater recovery production line by combining the maintenance data and fault maintenance data of each piece of equipment in the historical data. The maintenance planning scheme generation module obtains the maintenance cycle corresponding to each piece of equipment in the nitrate wastewater recovery production line from historical data, as well as the maintenance demand judgment results corresponding to the corresponding equipment, dynamically adjusts the maintenance cycle of each piece of equipment, and generates a maintenance planning scheme based on the maintenance demand judgment results of each piece of equipment. The equipment maintenance management module analyzes the periodic change interference value of each maintenance planning scheme based on the determination results of various maintenance needs, and selects the maintenance planning scheme with the smallest periodic change interference value as the optimal maintenance planning scheme. The module then adjusts the equipment maintenance cycle of the corresponding equipment according to the optimal maintenance planning scheme and provides the adjusted equipment maintenance cycle to the user for review. The analysis of maintenance planning schemes based on the determination results of various maintenance needs, and the calculation formula for the periodic change interference value corresponding to each maintenance planning scheme, is as follows: ; in, GM k This represents the maintenance planning scheme based on the results of various maintenance needs assessments. k The periodic change interference value corresponding to each maintenance plan scheme; F （j，k） Indicates the first k The first maintenance plan j The maintenance requirements assessment value for each piece of equipment; j1 Indicates the first k The number of equipment in each maintenance plan; TMA （j，k） Indicates the first k The first maintenance plan j The equipment maintenance cycle is dynamically adjusted for each piece of equipment. TMB （j，k） Indicates the first k The first maintenance plan j The equipment maintenance cycle before dynamic adjustment of each piece of equipment. FTA （j，k） Indicates the first k The first maintenance plan j In historical data, the time since the last maintenance or fault repair for each device is equal to... TMA （j，k） The average value of each maintenance requirement assessment value corresponding to each time; FTB （j，k） Indicates the first k The first maintenance plan j In historical data, the time since the last maintenance or fault repair for each device is equal to... TMB （j，k） The average value of each maintenance requirement assessment value corresponding to each time.

6. A digital maintenance management system for nitrate wastewater recovery equipment according to claim 5, characterized in that: The maintenance requirement analysis module includes a fluctuation characteristic analysis unit and a maintenance requirement determination unit. The fluctuation characteristic analysis unit generates state fluctuation characteristic information for each piece of equipment in the nitrate wastewater recovery production line based on the summary of the operating status of the nitrate wastewater recovery production line at different times. The maintenance requirement determination unit combines the maintenance data and fault maintenance data of each equipment in the historical data to determine the maintenance requirements of each piece of equipment in the nitrate wastewater recovery production line.

7. A digital maintenance and management system for nitrate wastewater recovery equipment according to claim 6, characterized in that: The equipment maintenance management module includes a dynamic screening unit for maintenance planning schemes and a maintenance cycle adjustment and feedback unit. The dynamic screening unit for maintenance planning schemes analyzes the periodic change interference value of each maintenance planning scheme based on the determination results of each maintenance need, and selects the maintenance planning scheme with the smallest periodic change interference value as the best maintenance planning scheme. The maintenance cycle adjustment and feedback unit adjusts the maintenance cycle of the corresponding equipment according to the optimal maintenance plan, and feeds back the adjusted maintenance cycle to the user for review.

Images