A method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions

Abstract

The present invention discloses a method for optimizing the scheduling and water supply of recycled water and conventional water under drought conditions, comprising the following steps: evaluating the drought level through meteorological data, precipitation forecast, and reservoir water level factors, and dynamically adjusting the water supply of conventional water sources according to the drought level, giving priority to domestic and ecological water use; evaluating and dividing the demand for recycled water and water quality level according to the production type and water quality requirements of the enterprise, and optimizing the allocation of water sources; minimizing the total water shortage and water use cost through the optimization scheduling model, and reasonably scheduling recycled water and conventional water; setting constraints to ensure that the water supply capacity of conventional water sources, the recycled water processing capacity, and the pipe network allocation capacity are not overloaded. The present invention ensures the reasonable supply of conventional water sources and recycled water through accurate drought level assessment and dynamic adjustment of water sources; provides recycled water with matching water quality levels for different water quality requirements of enterprises, effectively reducing over-processing and water quality waste.

Description

Technical Field

[0001] The present invention relates to the technical field of recycled water utilization, and in particular to a method for optimizing the scheduling and supply of recycled water and conventional water under drought conditions. Background Art

[0002] At present, water source scheduling is mainly focused on the joint scheduling between different types of conventional water sources. The joint use of recycled water and conventional water also focuses on the multi-source configuration in the planning period under the conventional water supply scenario. In terms of the joint scheduling of recycled water and conventional water, most existing technologies do not consider the multi-source scheduling needs under special circumstances such as drought, but are more based on scheduling methods under normal water supply scenarios. In many cases, the use of recycled water technology is mainly applied to conventional water supply needs, and no scheduling optimization of recycled water and conventional water is carried out to meet the special needs of recycled water under drought conditions.

[0003] As the main target of recycled water, industrial parks need to prioritize the water needs of life and basic ecological use as drought intensifies. The water supply to industrial park enterprises gradually decreases. The more severe the drought, the less water supply to industrial enterprises, resulting in tight supply and demand in industrial parks. As a water source that is less affected by meteorology and has a relatively stable supply, it is crucial to properly adjust the use of recycled water according to the changes in conventional water supply to alleviate the shortage of industrial water. The joint scheduling of recycled water and conventional water in industrial parks faces the following three main problems:

[0004] 1. Under different drought scenarios, the demand for recycled water and the number of enterprises that need to supply recycled water will also change; as the severity of the drought intensifies, more enterprises will need to replenish recycled water, and the requirements of different enterprises for water quality will also be more differentiated; that is, the more severe the drought, the greater the amount of recycled water supply required, and the requirements of enterprises for water quality will gradually increase, requiring recycled water supply with higher water quality grades;

[0005] Second, providing recycled water of different water quality levels requires different levels of treatment; the higher the water quality requirements, the higher the required treatment process and cost, so the improvement of water quality level is accompanied by an increase in treatment costs;

[0006] 3. The coverage of the recycled water distribution network is limited, and it can usually only meet the needs of a part of enterprises, and it is difficult to cover all enterprises in the industrial park; this limitation restricts the effective use of recycled water, especially in drought conditions, and it is impossible to ensure that all enterprises can get sufficient recycled water supply.

[0007] Based on this, a method for optimizing the scheduling and supply of recycled water and conventional water under drought conditions is needed. Summary of the invention

[0008] To achieve the above object, the present invention provides the following scheme: a method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions, comprising the following steps:

[0009] Step 1: According to the current drought level, calculate the water shortage under the current drought scenario by analyzing meteorological data, historical precipitation, water level in the river basin and water supply, and evaluate the total water required by the industrial park;

[0010] Step 2: According to different drought levels, the priority levels and water supply limits of conventional water sources are divided, and conventional water sources are allocated to domestic water and ecological water according to the preset priority order, and the remaining water sources are used for water supply to industrial parks;

[0011] Step 3: Classify and evaluate the amount of recycled water and its water quality level required by each enterprise in the industrial park according to the production type and water quality requirements of each enterprise in the industrial park. The water quality level includes three levels: low, medium and high;

[0012] Step 4: Construct an optimization scheduling model with the objective function of minimizing the total water shortage and total water use cost in the industrial park by optimizing the scheduling of recycled water and conventional water;

[0013] Step 5: Set multiple constraints in the model, including the water supply capacity of conventional water sources, the treatment capacity of recycled water, the transportation capacity of the pipeline network, and the specific requirements of each enterprise for water quality;

[0014] Step 6: Use the simplex optimization method in linear programming to solve and optimize the values ​​of each variable in the model, that is, minimize the total water shortage and total water use cost, and achieve the water supply of the water quality level required by each enterprise;

[0015] Step 7: Input the optimization results into the scheduling management system, monitor the water supply situation in real time, and dynamically adjust the water allocation plan to ensure the water supply needs of the industrial park.

[0016] Further preferably, in step 4, the objective function of the optimization scheduling model includes: minimizing the total water shortage of the industrial park to ensure that the water demand of the enterprise is met; minimizing the water cost, and reasonably scheduling the ratio of recycled water and conventional water. The total water shortage calculation formula is:

[0017]

[0018] in, Indicates the total water shortage, Indicates the enterprise The water requirement, Indicates the enterprise Actual water supply;

[0019] The total water cost calculation formula is:

[0020]

[0021] in, represents the total water cost;

[0022] and represent the usage of conventional water and recycled water respectively;

[0023] and Represent the unit costs of conventional water and recycled water, respectively.

[0024] Further preferably, the constraints of the scheduling model include:

[0025] a. Water supply capacity of conventional water sources: Under different drought levels, the water supply limit of conventional water sources is allocated according to the degree of water shortage. The calculation method is:

[0026]

[0027] in, Indicates the actual water supply from conventional water sources; Indicates the maximum supply capacity of conventional water sources;

[0028] b. Recycled water processing capacity: Different enterprises have different requirements for water quality levels. The recycled water processing capacity needs to be dynamically adjusted according to the demand for water quality levels. The calculation formula is:

[0029]

[0030] in, Indicates the actual amount of recycled water treated; Indicates the maximum treatment capacity of the recycled water system;

[0031] c. Pipeline network allocation capacity: Cover all enterprises in need with the recycled water pipeline network and adjust the water supply according to the load capacity of the water supply network. The calculation formula is:

[0032]

[0033] in, Indicates the total water delivery of the pipe network; Indicates the maximum water delivery capacity of the pipe network.

[0034] Further preferably, the objective function of the optimization scheduling model includes minimizing the total water shortage and total water use cost in the industrial park, and step 4 further includes:

[0035] Constraints are added to the objective function to ensure that the water needs of each industrial enterprise are met under different drought levels, and to give priority to the water needs of enterprises with higher water quality requirements.

[0036] Further preferably, the constraints of the optimization scheduling model include:

[0037] a. The conventional water source supply capacity constraint in step 5: the supply of conventional water sources will not exceed its maximum capacity, and the priority of conventional water source supply will be adjusted according to different drought levels;

[0038] b. Recycled water treatment capacity: According to the water quality requirements of the enterprise, refine the treatment level of recycled water and treat it according to actual needs;

[0039] c. Constraints on pipeline network capacity: In step 5, the design and operation and maintenance of all recycled water supply pipelines must not be overloaded and must be dynamically adjusted based on the geographical location and demand differences of enterprises in the park;

[0040] The network load refers to the total amount of recycled water that the current network needs to supply, and the sum of the amount of water that needs to be provided to all connected enterprises;

[0041] The maximum load of the pipeline network refers to the maximum water supply capacity that the pipeline network system can carry during its design and operation.

[0042] Further preferably, in step 7, the scheduling management system includes computer hardware components and software systems, the hardware components include water quality monitoring sensors, flow meters, and data acquisition systems for collecting various types of real-time data, and the software system includes a scheduling algorithm module, a real-time monitoring module, and an optimization decision module for dynamically scheduling and adjusting the supply of water sources;

[0043] The dispatching and management system integrates the calculation results in the optimization dispatching model and combines real-time data to adjust the supply, water demand and water quality of various water sources in real time. The real-time data in the dispatching and management system includes:

[0044] Real-time meteorological data, water supply data and enterprise water demand data.

[0045] Further preferably, the scheduling management system adjusts the water supply ratio in real time according to the optimization scheduling result in step 6. During the adjustment process, the new scheduling plan is calculated and executed according to the real-time water supply situation, the water demand of the enterprise, and the pipe network load, and the water supply demand changes are dynamically responded. The required calculation formula is:

[0046]

[0047] Final dispatch plan; Optimization scheduling results, initial water source allocation results obtained based on the optimization model; Dynamic adjustment factor, calculated based on real-time water supply capacity and demand forecast.

[0048] Further preferably, in step 1, the drought level assessment basis includes meteorological data, precipitation forecast, reservoir water level and basin flow factors, and combines historical data and real-time data forecast analysis to dynamically adjust the drought level for optimizing the water source scheduling plan. The required calculation formula is:

[0049] ;

[0050] in: It is the drought level;

[0051] , , , : The weight coefficient of each factor, representing the importance of each factor to the drought level assessment;

[0052] For meteorological data; For precipitation prediction; is the basin flow; is the historical reservoir water level;

[0053] Drought level It is obtained by a weighted combination of meteorological data, precipitation forecasts, basin flows and historical reservoir levels.

[0054] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0055] 1. The present invention ensures the rationality of conventional water supply through accurate drought level assessment and dynamic adjustment of water supply. As the drought becomes more severe, the conventional water supply will gradually decrease according to preset priorities and drought levels, giving priority to domestic and ecological water use, and the remaining water will be used in industrial parks. Flexible water supply adjustment can solve the problem of insufficient conventional water supply in drought situations, ensuring that the water source of the industrial park is reasonably allocated.

[0056] 2. The present invention adjusts the amount and water quality level of recycled water supply in real time according to the changes in the water quality demand of enterprises under different drought levels. When the drought is severe, more enterprises will need recycled water, and the requirements for water quality will gradually increase. By reasonably allocating recycled water of different water quality levels, it can ensure that the production of enterprises is not affected by water quality, while reducing the waste of resources caused by excessive processing.

[0057] 3. The present invention accurately matches water quality requirements with treatment costs. For enterprises with higher water quality requirements, high-grade recycled water is provided and corresponding deep treatment is adopted. For enterprises with lower water quality requirements, a relatively simplified treatment method is adopted to reduce unnecessary treatment costs. Through differentiated water quality treatment methods, water quality treatment costs can be effectively controlled while ensuring that the water supply quality meets the needs of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0059] Figure 1 The present invention coordinates and dispatches an optimized industrial water supply flow chart. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] Example

[0063] like Figure 1 As shown, in this embodiment, a method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions includes:

[0064] Step 1: Drought level assessment is to calculate the water shortage under drought scenarios by analyzing multiple factors such as meteorological data, historical precipitation, water level in the basin and water supply, and to assess the total water required by the industrial park. Specifically, by collecting real-time meteorological data of environmental factors such as temperature, precipitation and evaporation, the impact of current climate conditions on water resources is assessed. Combined with historical precipitation data and precipitation forecasts, the trend of precipitation changes in the long and short term is reflected to more accurately estimate the drought situation. The water level in the basin is affected by precipitation and geographical factors, reflecting the water supply capacity. The flow in the basin provides actual data on the flow of water bodies, which helps to determine whether there is enough water to meet the needs of the industrial park.

[0065] Combining the above data, statistical analysis methods and machine learning are used to establish a drought assessment model. The drought level is dynamically assessed through weighted calculations based on meteorological data, precipitation forecasts, reservoir water levels, and river basin flow factors. The assessment model is cross-validated with historical data and real-time data. It can not only determine the current degree of drought, but also predict future water shortages based on data trends, providing real-time changes in drought levels for the water scheduling system.

[0066] The historical reservoir water level can reflect the change trend of reservoir water volume in the past few months or years, which helps to judge the stability of water supply in the future. The required calculation method is:

[0067] In step 1, the drought level is assessed based on meteorological data, precipitation forecast, reservoir water level and river flow factors, and combined with historical data and real-time data forecast analysis to dynamically adjust the drought level for optimizing the water source scheduling plan. The required calculation formula is:

[0068] ;

[0069] In the formula: , , , Meteorological data , precipitation forecast , Basin flow and historical reservoir water levels The weight coefficient is determined through data analysis and reflects the influence of each factor on the drought level assessment;

[0070] By analyzing historical data, statistical methods are used to determine each factor, and if the meteorological data has a high correlation with the occurrence of drought, a higher weight is given. ,That , , The weight of The weights can be adjusted for different regions, for example, the weight of precipitation forecast in precipitation-dominated regions will be higher, while areas where water is mainly stored in reservoirs will be will be higher;

[0071] For example, the drought level of a region is based on the following data:

[0072] Weather data : The assessment found that the impact on drought level was 40%;

[0073] Precipitation forecast : The impact on drought level is 30% through analysis;

[0074] Basin flow : The impact on drought level is 20%;

[0075] Historical reservoir water levels : The impact on drought level is 10%.

[0076] The weight factor can be set as: .

[0077] It is further assumed that the data of each factor are: meteorological data index: 75; precipitation forecast index: 60; basin flow index: 50; historical reservoir water level index: 40;

[0078] Substituting into the formula: ;

[0079] And calculate: ;

[0080] By weighting and integrating factors, the drought level is dynamically calculated and water scheduling is adjusted based on real-time data.

[0081] Step 2: Prioritize the allocation of conventional water sources according to the drought level, and allocate water supply according to the preset priority order. The severity of the drought is determined by combining the drought level information obtained through the evaluation in step 1 with meteorological data, changes in water level in the river basin, and historical precipitation. The water supply of conventional water sources will be subject to different restrictions according to different drought levels. When the drought level is high, the pressure on water resource supply increases, and the water supply capacity of conventional water sources will be limited. It is necessary to give priority to ensuring domestic water and ecological water needs;

[0082] Water supply allocation process of conventional water sources: conventional water sources are allocated to domestic water and ecological water according to a predetermined priority order. Ecological water is mainly used to maintain the basic needs of the ecological environment. The needs of domestic and ecological water are prioritized in any case. Therefore, in the case of drought, the water supply of conventional water sources will first meet these two demand categories;

[0083] After the demand for domestic water and ecological water is fully guaranteed, the remaining water will be used to supply water to the industrial park. The water demand of the industrial park will be further allocated according to the production needs and water quality requirements of each enterprise in the park.

[0084] The water supply capacity of conventional water sources will be restricted as the drought level increases. The specific calculation method is as follows: .

[0085] Through calculations, it is ensured that the maximum water supply capacity of conventional water sources will not exceed their actual available capacity. At the same time, the water supply will be adjusted according to changes in the drought level. As the drought level increases, the water supply capacity of conventional water sources will gradually decrease, and more water resources will be allocated to domestic and ecological use, ensuring that under different drought levels, the water supply priority and allocation method are appropriately adjusted to cope with extreme drought conditions.

[0086] Step 3: Classify and evaluate the production types and water quality requirements of each enterprise in the industrial park in detail, and allocate recycled water resources reasonably. The production type of each enterprise determines its demand for water quality, and different types of enterprises have different requirements for water quality;

[0087] For example, some high-tech manufacturing industries or chemical companies have stricter requirements on water quality and require high-level water quality to ensure the smooth progress of the production process; while for general production companies, water quality requirements are relatively loose and they accept lower-level water treatment standards. Based on this difference, the water quality requirements of enterprises are divided into three levels: low, medium and high;

[0088] Enterprises with high water quality requirements must obtain recycled water that has been treated to high standards. Enterprises have strict requirements on impurities, hardness, and chemical composition in water quality. The required recycled water must undergo multiple treatments such as advanced filtration, reverse osmosis, and ultraviolet disinfection to ensure that the water quality meets relevant production standards and safety requirements. This type of water quality is classified as high and requires priority allocation of water sources;

[0089] Enterprises with medium water quality requirements use recycled water with a moderate degree of treatment. Enterprises have less stringent requirements on water quality and can usually accept lower concentrations of organic matter and chemical components. The required recycled water can be treated by conventional secondary treatment processes such as sedimentation, activated carbon filtration, and simple disinfection to reach the standard medium water quality level.

[0090] Enterprises with low water quality requirements have low requirements for water quality and can directly use roughly treated recycled water. This type of water quality usually uses simple sedimentation tank filtration and simple disinfection for primary treatment, which can meet the basic production needs of the enterprise. The water quality level is classified as low;

[0091] By classifying the production nature and water quality requirements of each enterprise in the park, and combining the water consumption and water quality level of each enterprise, a detailed assessment of the demand for recycled water is completed. This not only takes into account the different water quality requirements of the enterprises, but also fully considers the impact of water pollutants that may be generated in the production process on water quality, ensuring that the quality of recycled water required by each enterprise is met.

[0092] Step 4: The goal of the scheduling model is to minimize the total water shortage and total water use cost in the industrial park, and to achieve the optimal configuration of water sources by optimizing the scheduling of recycled water and conventional water. Two objective functions are set:

[0093] Minimize the total water shortage: In drought conditions, enterprises in the industrial park often face varying degrees of water shortage. It is necessary to accurately calculate the water shortage of each enterprise. The total water shortage calculation formula is:

[0094]

[0095] Among them, the "required water volume" is the actual water consumption of each enterprise calculated based on the production needs and water quality requirements of the enterprise, while the "actual water supply" is the actual water volume obtained by the enterprise calculated based on the available amount of water source and the water source allocation plan. By minimizing the total water shortage, the optimized scheduling model effectively reduces the waste of water resources;

[0096] Minimize the total water cost: The unit cost of conventional water sources and recycled water is different. After recycled water is treated, the cost of conventional water sources is relatively low. The total water cost is calculated as follows:

[0097]

[0098] By optimizing this goal, we can ensure that the water source scheduling plan can minimize the overall water use cost while ensuring water supply security, thereby improving the water resource utilization efficiency and economic benefits of the industrial park;

[0099] The objective function includes constraints to ensure that the water allocation of each enterprise can be reasonably adjusted under different drought levels. The specific constraints include:

[0100] Prioritize water quality: In the case of high drought levels, priority will be given to enterprises with high water quality requirements. The production processes of enterprises have high water quality requirements. Substandard water quality will lead to production interruptions or substandard products. The scheduling model will prioritize the allocation of recycled water with high water quality levels through constraints;

[0101] Water shortage restrictions: The water allocation to each enterprise must meet its minimum water demand, ensuring that the production activities of the enterprise are not affected by water shortages in any drought situation, while maximizing water utilization efficiency;

[0102] By incorporating constraints into the optimization model, it is ensured that each enterprise can reasonably allocate water resources under different drought levels and minimize the total water shortage and water use costs.

[0103] Step 5: Set multiple constraints to ensure the operability of the scheduling model in practical applications. Each constraint is:

[0104] The water supply capacity of conventional water sources is affected by the degree of water shortage and the level of drought. As the drought level increases, the water supply of conventional water sources will be gradually tightened to ensure that water sources can be reasonably allocated and give priority to domestic water and ecological water. Under different drought scenarios, the water supply capacity of conventional water sources will be dynamically adjusted to avoid the situation where excessive conventional water supply leads to the inability to meet other water demands. The calculation method is:

[0105]

[0106] Through calculation, it is ensured that the water supply of conventional water sources will not exceed its maximum supply capacity when the drought level increases, and the water supply is dynamically adjusted according to the degree of drought to ensure the rational use of water sources;

[0107] The processing capacity of recycled water is different from that of enterprises in the industrial park. The classification of low, medium and high water quality will affect the degree of recycled water treatment. For enterprises with higher water quality requirements, more complex treatment processes are required to meet their water quality requirements. Therefore, the processing volume of recycled water must be accurately calculated and scheduled according to actual needs. If the water quality is over-treated, it will waste resources and increase costs; on the contrary, insufficient treatment will easily lead to substandard water quality and affect production.

[0108] Through calculations, we ensure that the amount of recycled water treated is dynamically adjusted strictly according to the actual needs of each enterprise, avoiding unnecessary over-treatment or waste of resources, while ensuring that the water quality needs of the enterprise are fully met.

[0109] The distribution capacity of the pipeline network. During the dispatching process, due to the different geographical locations of enterprises in the park, the load capacity of the pipeline network also varies. The load of the pipeline network needs to be dynamically adjusted according to the demand of each enterprise to avoid overload of the pipeline network, ensure the stability of water supply in the entire park, ensure that the water supply capacity of the pipeline network is not exceeded, and reasonably distribute recycled water to each enterprise. The calculation method is:

[0110]

[0111] Through the above three constraints, the optimization scheduling model can dynamically adjust the water supply ratio under drought scenarios and maximize the utilization efficiency of water resources.

[0112] Step 6, use the simplex method in linear programming to optimize the solution, optimize the values ​​of each variable in the model by minimizing the total water shortage and the total water use cost, and achieve the water supply of the water quality level required by each enterprise.

[0113] Step 7: The optimization results will be input into the dispatching management system to monitor the water supply in real time and dynamically adjust the water supply according to the real-time data. The dispatching management system will adjust the water allocation plan by integrating the calculation results of the optimization model and combining the real-time data to cope with the changes in water supply demand. The real-time data in the system include: real-time meteorological data; water supply data; enterprise water demand data. The required calculation is: , Final dispatch plan; Optimization scheduling results, initial water source allocation results obtained based on the optimization model; Dynamic adjustment factor, calculated based on real-time water supply capacity and demand forecast.

[0114] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions, characterized in that: The following steps are involved: Step 1: According to the current drought level, calculate the water shortage under the current drought scenario by analyzing meteorological data, historical precipitation, water level in the river basin and water supply, and evaluate the total water required by the industrial park; Step 2: According to different drought levels, the priority levels and water supply limits of conventional water sources are divided, and conventional water sources are allocated to domestic water and ecological water according to the preset priority order, and the remaining water sources are used for water supply to industrial parks; Step 3: Classify and evaluate the amount of recycled water and its water quality level required by each enterprise in the industrial park according to the production type and water quality requirements of each enterprise in the industrial park. The water quality level includes three levels: low, medium and high; Step 4: Construct an optimization scheduling model with the objective function of minimizing the total water shortage and total water use cost in the industrial park and optimizing the scheduling of recycled water and conventional water; Step 5: Set multiple constraints in the model, including the water supply capacity of conventional water sources, the treatment capacity of recycled water, the transportation capacity of the pipeline network, and the specific requirements of each enterprise for water quality; Step 6: Use the simplex optimization method in linear programming to solve and optimize the values ​​of each variable in the model, that is, minimize the total water shortage and total water use cost, and achieve the water supply of the water quality level required by each enterprise; Step 7: Input the optimization results into the scheduling management system, monitor the water supply situation in real time, and dynamically adjust the water allocation plan to ensure the water supply needs of the industrial park.

2. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 1, characterized in that: In step 4, the objective function of the optimization scheduling model includes: minimizing the total water shortage of the industrial park to ensure that the water demand of enterprises is met; minimizing the water cost and reasonably scheduling the ratio of recycled water and conventional water. The total water shortage calculation formula is: in, Indicates the total water shortage, Indicates the enterprise The water requirement, Indicates the enterprise Actual water supply; The total water cost calculation formula is: in, represents the total water cost; and represent the usage of conventional water and recycled water respectively; and Represent the unit costs of conventional water and recycled water, respectively.

3. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 2, characterized in that: The constraints of the optimization scheduling model include: a. Water supply capacity of conventional water sources: Under different drought levels, the water supply limit of conventional water sources is allocated according to the degree of water shortage. The calculation method is: in, Indicates the actual water supply from conventional water sources; Indicates the maximum supply capacity of conventional water sources; b. Recycled water processing capacity: Different enterprises have different requirements for water quality levels. The recycled water processing capacity needs to be dynamically adjusted according to the demand for water quality levels. The calculation formula is: in, Indicates the actual amount of recycled water treated; Indicates the maximum treatment capacity of the recycled water system; c. Pipeline network allocation capacity: Cover all enterprises in need with the recycled water pipeline network and adjust the water supply according to the load capacity of the water supply network. The calculation formula is: in, Indicates the total water delivery of the pipe network; Indicates the maximum water delivery capacity of the pipe network.

4. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 1, characterized in that: The objective function of the optimization scheduling model includes minimizing the total water shortage and total water use cost in the industrial park, and step 4 further includes: Constraints are added to the objective function to ensure that the water needs of each industrial enterprise are met under different drought levels, and to give priority to the water needs of enterprises with higher water quality requirements.

5. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 1, characterized in that: The constraints of the optimization scheduling model include: a. The conventional water source supply capacity constraint in step 5: the supply of conventional water sources will not exceed its maximum capacity, and the priority of conventional water source supply will be adjusted according to different drought levels; b. Recycled water treatment capacity: According to the water quality requirements of the enterprise, refine the treatment level of recycled water and treat it according to actual needs; c. Constraints on pipeline network capacity: In step 5, the design and operation and maintenance of all recycled water supply pipelines must not be overloaded and must be dynamically adjusted based on the geographical location and demand differences of enterprises in the park; The network load refers to the total amount of recycled water that the current network needs to supply, and the sum of the water that needs to be provided to all connected enterprises; The maximum load of the pipeline network refers to the maximum water supply capacity that the pipeline network system can carry during its design and operation.

6. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 1, characterized in that: In step 7, the scheduling management system includes computer hardware components and software systems. The hardware components include water quality monitoring sensors, flow meters and data acquisition systems for collecting various real-time data. The software system includes a scheduling algorithm module, a real-time monitoring module and an optimization decision module for dynamically scheduling and adjusting the supply of water sources. The dispatching and management system integrates the calculation results in the optimization dispatching model and combines real-time data to adjust the supply, water demand and water quality of various water sources in real time. The real-time data in the dispatching and management system includes: Real-time meteorological data, water supply data and enterprise water demand data.

7. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 1, characterized in that: The scheduling management system adjusts the water supply ratio in real time according to the optimization scheduling result in step 6. During the adjustment process, the new scheduling plan is calculated and executed according to the real-time water supply situation, the water demand of the enterprise and the pipe network load, and the water supply demand changes are dynamically responded. The required calculation formula is: Final dispatch plan; Optimization scheduling results, initial water source allocation results obtained based on the optimization model; Dynamic adjustment factor, calculated based on real-time water supply capacity and demand forecast.

8. The method for optimizing the scheduling of water supply of recycled water and conventional water under drought conditions according to claim 1, characterized in that: In step 1, the drought level is assessed based on meteorological data, precipitation forecast, reservoir water level and river flow factors, and combined with historical data and real-time data forecast analysis to dynamically adjust the drought level for optimizing the water source scheduling plan. The required calculation formula is: ； in: It is the drought level; , , , : The weight coefficient of each factor, representing the importance of each factor to the drought level assessment; For meteorological data; For precipitation forecast; is the basin flow; is the historical reservoir water level; Drought level It is obtained by a weighted combination of meteorological data, precipitation forecasts, basin flows and historical reservoir levels.

Images