Circulating water system operation optimization method and system, terminal and medium

Abstract

The invention provides a circulating water system operation optimization method and system.The method comprises the steps that key parameters of a circulating water system are obtained, and the key parameters comprise real-time temperature data after process cooling, real-time flow velocity data of a water cooler tube pass or a shell pass, real-time temperature difference data of circulating water and real-time water quality index data; constructing a pipe network simulation model, and obtaining pipe network simulation real-time operation data; the key parameters and the pipe network simulation real-time operation data are optimized, and the optimal circulating water consumption, the optimal chemical adding amount and the optimal chemical proportion are obtained; and respectively outputting control signals to a flow control system and an automatic dosing system of the circulating water system according to the optimal circulating water consumption, the optimal dosing amount and the optimal drug ratio, so as to realize operation optimization of the circulating water system. Meanwhile, the invention provides a corresponding terminal and a medium. Water quality indexes are combined with energy conservation and water conservation of the system and converted into an online technology, management of the circulating water system is enhanced, and stable, long-term and excellent operation of the circulating water system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of stable operation of industrial circulating water systems, and in particular to a circulating water system operation optimization method, system, terminal and medium. Background Art

[0002] Circulating water is the most important cold utility project in the petrochemical industry. Not only does electricity consumption account for a large proportion of the company's production costs, but the loss of circulating water drainage is also an important component of the company's high water consumption.

[0003] For a long time, since the circulating water system is a production auxiliary device and its water use points are relatively scattered, energy conservation management has paid little attention to it. However, with the increasingly stringent requirements of society for enterprises to save energy and reduce emissions, and the urgent need for enterprises to reduce production costs, enterprises' energy conservation and consumption reduction work in circulating water systems has also become increasingly effective.

[0004] The indicators that affect the stable and long-term operation of the circulating water system are complex, among which the circulating water quality is one of the most important indicators. At present, many companies and scientific research institutions have conducted in-depth research on water quality, such as:

[0005] The Chinese invention patent application numbered 201610747723.7, "Low-phosphorus high-efficiency scale and corrosion inhibitor for circulating water treatment and its preparation method", the Chinese invention patent application numbered 201010549192.3, "A low-phosphorus high-concentration circulating water treatment process method", and "Development and performance research of environmentally friendly corrosion inhibitors" published by Guo Ruhui in the Journal of Hebei Academy of Sciences, etc. However, the above patent technologies all reduce the problem of circulating water scaling from the perspective of drug type or ratio, without combining the key operating parameters of the process and the key operating parameters of the water cooling equipment; in addition, the above patents are all offline calculations, which lag behind in water quality adjustment and greatly increase the labor intensity of on-site staff.

[0006] At present, the common energy-saving measures for circulating water systems in enterprises mainly include: replacing pumps, converting fans to turbines or turbines to fans, replacing check valves, etc., mainly to achieve energy-saving effects from the perspective of replacing energy-saving equipment. In addition, there are also overall optimization solutions for circulating water systems that start from users, take production processes as the starting point, and combine pipe network layout. These solutions also have the following technical problems: they cannot solve the problem of scattered water points and difficulty in centralized management, and energy-saving transformation is one-time, that is, it can only be achieved when there is an opportunity to stop work for maintenance. They fail to provide real-time operation optimization suggestions and cannot effectively help enterprises achieve refined management.

[0007] Currently, water quality and overall energy conservation of circulating water systems are rarely improved simultaneously, and there is a serious lack of monitoring methods. The transparency of circulating water systems is low, which brings greater management difficulties. Summary of the invention

[0008] In view of the above-mentioned deficiencies in the prior art, the present invention provides a circulating water system operation optimization method, system, terminal and medium.

[0009] According to one aspect of the present invention, there is provided a method for optimizing the operation of a circulating water system, comprising:

[0010] Obtain key parameters of the circulating water system, including: real-time data of process cooling temperature, real-time data of flow rate in the tube or shell of the water cooler, real-time data of circulating water temperature difference, and real-time data of water quality indicators;

[0011] Using the key parameters to construct a pipeline network simulation model, and obtaining real-time operating data of the key parameters under pipeline network simulation;

[0012] Taking the control index or control standard of the key parameter as the optimization target, the real-time operation data of the key parameter is optimized to obtain the optimal circulating water dosage, dosage and drug ratio;

[0013] According to the optimal circulating water dosage, dosage and drug ratio, control signals are output to the flow control system and automatic drug adding system of the circulating water system respectively, so as to optimize the operation of the circulating water system.

[0014] Preferably, the constructing of the pipeline network simulation model and obtaining the real-time operation data of the key parameters under the pipeline network simulation includes:

[0015] According to the on-site survey data and the layout of the circulating water network, combined with the key parameters, a network simulation model is constructed;

[0016] The flow of circulating water in the pipeline is simulated in real time through the pipeline network simulation model;

[0017] According to the real-time simulation situation, the pipeline pressure drop is calculated, and the circulating water is guided to reasonably allocate the water volume of each branch user in the pipeline network, so as to obtain the real-time operation data of the key parameters under the pipeline network simulation situation.

[0018] Preferably, the pipeline network simulation model is constructed using PIPENET pipeline network fluid analysis software.

[0019] Preferably, the control index or control standard of the key parameter is used as the optimization target, and the real-time operation data of the key parameter is optimized to obtain the optimal circulating water dosage, dosage and drug ratio, including:

[0020] Taking the circulating water flow rate of each branch, the dosage and the dosage ratio of each drug as independent variables, and the control index or control standard of the key parameters as the constraint conditions, the real-time operation data of the key parameters are optimized to obtain the optimal circulating water dosage, dosage and drug ratio.

[0021] Preferably, the control index or control standard of the key parameters includes:

[0022] -Optimize the process cooling temperature to 40-50℃;

[0023] -Optimize the flow rate of the water cooler tube or shell side to:

[0024] When the circulating water flows through the tube of the water cooler, the flow rate of the circulating water is controlled to be above 1.0m / s;

[0025] When circulating water flows through the shell side of the water cooler, the flow rate of circulating water is controlled above 0.3m / s;

[0026] -Optimize the circulating water temperature difference to: above 6℃;

[0027] - The water quality indicators include: turbidity, total phosphorus content, total alkalinity, petroleum index and COD index; among which:

[0028] Optimize turbidity to: less than or equal to 20NTU;

[0029] Optimize the total phosphorus content to: 5.5-9.0 mg / L;

[0030] Optimize the total alkalinity to: greater than or equal to 200 mg / L;

[0031] Optimize the petroleum index to: less than or equal to 10.0 mg / L;

[0032] Optimize the COD index to: less than or equal to 150 mg / L.

[0033] Preferably, the real-time operation data of the key parameters are optimized by taking the circulating water flow rate of each branch, the dosage and the dosage ratio as independent variables and the control index or control standard of the key parameters as constraint conditions, including:

[0034] Obtain the circulating water flow of each branch;

[0035] According to the circulating water flow of each branch, the total water volume Q required by the user is calculated as:

[0036]

[0037] Where D represents the inner diameter of each user branch pipeline in the circulating water network, u represents the circulating water flow rate of each user branch in the circulating water network, and the subscript number represents each user branch in the circulating water network;

[0038] According to the control index or control standard of the key parameters, the amount of each drug added is calculated as:

[0039]

[0040] Among them, G r Indicates the amount of medicine added when the system is running, Q b Indicates the amount of sewage discharged, Q w It indicates the amount of wind loss, and g indicates the amount of medicine added per liter of circulating cooling water;

[0041] The real-time operating data of the key parameters are optimized based on the total amount of water required by the user and the amount of each drug added.

[0042] According to another aspect of the present invention, there is provided a circulating water system operation optimization system, comprising:

[0043] A key parameter acquisition module, which includes a process cooling temperature real-time data acquisition unit, a water cooler tube side or shell side flow rate real-time data acquisition unit, a circulating water temperature difference real-time data acquisition unit, and a water quality index real-time data acquisition unit, which are respectively used to obtain key parameters of the circulating water system;

[0044] A simulation data acquisition module, which uses the key parameters to build a pipeline network simulation model and obtains real-time operating data of the key parameters under pipeline network simulation;

[0045] A data processing module, which takes the control index or control standard of the key parameter as the optimization target, optimizes the real-time operation data of the key parameter, and obtains the best circulating water dosage, dosage and drug ratio;

[0046] The signal output module outputs control signals to the flow control system and the automatic dosing system of the circulating water system according to the optimal circulating water consumption, dosing amount and drug ratio, so as to optimize the operation of the circulating water system.

[0047] According to a third aspect of the present invention, there is provided a terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor can be used to execute any of the above-mentioned methods or to run the above-mentioned system when executing the program.

[0048] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, can be used to execute any of the above-mentioned methods, or to run the above-mentioned system.

[0049] Due to the adoption of the above technical solution, the present invention has at least one of the following beneficial effects compared with the prior art:

[0050] The present invention combines water quality indicators with system energy and water conservation, and transforms them into online technology, thereby strengthening the management of the circulating water system and ensuring the stable and long-term operation of the circulating water system.

[0051] The present invention simulates the circulating water network under the premise of ensuring the post-cooling temperature of the process, the reasonable tube-side or shell-side flow rate of the water cooler, and the reasonable circulating water temperature difference, and comprehensively processes the above constraints, real-time operation data and water quality indicators, provides a reasonable amount of water saving in real time, continuously optimizes energy and water saving through operation, and obtains the dosage and drug ratio of the automatic dosing system.

[0052] The present invention performs integrated diagnosis and analysis on data, realizes transparency of the circulating water system, improves the management level, and achieves the goals of energy and water conservation and long-term, complete and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0054] Figure 1 This is a flow chart of a method for optimizing the operation of a circulating water system in one embodiment of the present invention.

[0055] Figure 2 The following is a logical relationship diagram of the circulating water system operation optimization method in a preferred embodiment of the present invention; wherein: the process cooling temperature, tube side or shell side flow rate, circulating water temperature difference, water quality index and real-time operation data of the pipe network simulation are input parameters; the dosage and drug ratio of the automatic dosing system and the circulating water consumption of the flow control system are output parameters. This preferred embodiment gives the optimal output parameters in real time based on the real-time data and index values ​​of the input parameters.

[0056] Figure 3 Schematic diagram of components of a circulating water system operation optimization system in one embodiment of the present invention. DETAILED DESCRIPTION

[0057] The following is a detailed description of the embodiments of the present invention: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

[0058] Figure 1 This is a flow chart of a method for optimizing the operation of a circulating water system in one embodiment of the present invention.

[0059] like Figure 1 As shown, the circulating water system operation optimization method provided in this embodiment may include the following steps:

[0060] S100, obtaining key parameters of the circulating water system, including: real-time data of process cooling temperature, real-time data of flow rate of water cooler tube side or shell side, real-time data of circulating water temperature difference, and real-time data of water quality index;

[0061] S200, constructing a pipe network simulation model using key parameters, and obtaining real-time operation data of key parameters under pipe network simulation;

[0062] S300, taking the control index or control standard of key parameters as the optimization target, optimizes the real-time operation data of key parameters to obtain the best circulating water dosage, dosage and drug ratio;

[0063] S400 outputs control signals to the flow control system and automatic dosing system of the circulating water system according to the optimal circulating water usage, dosing amount and drug ratio, so as to optimize the operation of the circulating water system.

[0064] In S200 of this embodiment, as a preferred embodiment, a pipeline network simulation model is constructed using key parameters to obtain real-time operating data of key parameters under pipeline network simulation, including:

[0065] S201, constructing a pipe network simulation model based on the on-site survey data and the layout of the circulating water pipe network in combination with key parameters;

[0066] S202, simulating the flow of circulating water in the pipeline in real time through a pipeline network simulation model;

[0067] S203, according to the real-time simulation situation, calculate the pipeline pressure drop, and guide the reasonable allocation of circulating water to each branch user in the pipeline network, and obtain the real-time operation data of key parameters under the pipeline network simulation situation.

[0068] In a specific application example, PIPENET pipe network fluid analysis software is used to build a pipe network simulation model.

[0069] In a preferred embodiment of S300, the control index or control standard of the key parameter is used as the optimization target, and the real-time operation data of the key parameter is optimized to obtain the optimal circulating water dosage, dosage and drug ratio, including:

[0070] Taking the circulating water flow rate of each branch, the dosage and the dosage ratio of each drug as independent variables, and the control index or control standard of the key parameters as the constraint conditions, the real-time operation data of the key parameters are optimized to obtain the optimal circulating water dosage, dosage and drug ratio.

[0071] In the control index or control standard of the key parameters, as a preferred embodiment, the temperature after process cooling is optimized to: 40-50°C.

[0072] In the control index or control standard of the key parameters, as a preferred embodiment, the flow rate of the water cooler tube side or shell side is optimized as follows:

[0073] When the circulating water flows through the tube of the water cooler, the flow rate of the circulating water is controlled to be above 1.0m / s;

[0074] When the circulating water flows through the shell side of the water cooler, the flow rate of the circulating water is controlled to be above 0.3m / s.

[0075] In the control index or control standard of the key parameters, as a preferred embodiment, the circulating water temperature difference is optimized to be above 6°C.

[0076] Among the control indicators or control standards of key parameters, as a preferred embodiment, water quality indicators include: turbidity, total phosphorus content, total alkalinity, petroleum indicators and COD indicators; wherein:

[0077] Turbidity optimization is: less than or equal to 20NTU;

[0078] The total phosphorus content is optimized to: 5.5-9.0 mg / L;

[0079] The total alkalinity is optimized to be greater than or equal to 200 mg / L;

[0080] The petroleum index is optimized to: less than or equal to 10.0 mg / L;

[0081] The COD index is optimized to: less than or equal to 150 mg / L.

[0082] In S300 of this embodiment, as a preferred embodiment, the circulating water flow rate of each branch, the dosage and the dosage ratio are used as independent variables, and the control index or control standard of the key parameter is used as the constraint condition to optimize the real-time operation data of the key parameter. The optimization method adopted is the gradient descent iterative optimization method, which gradually approaches the limit value by continuously searching along the negative gradient direction of the objective function. Its mathematical calculation formula can be expressed as:

[0083]

[0084] is the value of the model parameter at the nth iteration, Indicates learning efficiency, Represents parameter x n gradient.

[0085] The optimized key parameters include:

[0086] Obtain the circulating water flow of each branch;

[0087] According to the circulating water flow of each branch, the total water volume Q required by the user is calculated as:

[0088]

[0089] Where D represents the inner diameter of each user branch pipeline in the circulating water network, u represents the circulating water flow rate of each user branch in the circulating water network, and the subscript number represents each user branch in the circulating water network;

[0090] According to the control index or control standard of key parameters, the amount of each drug added is calculated as:

[0091]

[0092] Among them, G r Indicates the amount of medicine added when the system is running, Q b Indicates the amount of sewage discharged, Q w It indicates the amount of wind loss, and g indicates the amount of medicine added per liter of circulating cooling water;

[0093] Based on the total amount of water required by the user and the amount of each drug added, the real-time operating data of key parameters are optimized.

[0094] The circulating water system operation optimization method provided in this embodiment integrates key parameters in the circulating water system, such as process cooling temperature, water cooler pipe flow rate, circulating water temperature difference, water quality indicators, etc., for the stable and long-term operation of the circulating water system, comprehensively analyzes the above data, and puts forward the optimal operation suggestions to achieve the purpose of energy and water saving and stable and long-term operation of the circulating water system.

[0095] In some embodiments of the present invention, the process cooling temperature, water cooler tube side or shell side flow rate, circulating water temperature difference, pipe network simulation real-time operation data, water quality index and other data are displayed in real-time online form, and the optimal circulating water dosage, automatic dosing system dosage and drug ratio are obtained through analysis;

[0096] In some embodiments of the present invention, the temperature after process cooling: the temperature after process materials of the main production device cooled by circulating water are subject to design requirements and are generally controlled at 40-50°C;

[0097] In some embodiments of the present invention, the flow rate of the water cooler tube side or shell side: according to GB50050-2017 "Industrial Circulating Cooling Water Treatment Design Specification", when the circulating water flows through the tube side of the water cooler, the flow rate of the circulating water is controlled to be above 1.0m / s; when the circulating water flows through the shell side of the water cooler, the flow rate of the circulating water is controlled to be above 0.3m / s;

[0098] In some embodiments of the present invention, the circulating water temperature difference: to ensure the reasonable amount of circulating water, the temperature difference between the circulating water temperature of the water cooler inlet and the circulating water temperature of the water cooler outlet is generally controlled to be above 6°C;

[0099] In some embodiments of the present invention, the pipe network simulation model is based on the on-site survey data and the layout of the circulating water pipe network, using professional software to display the flow of circulating water in the pipe in real time, and at the same time calculate the pressure drop of the pipe, so as to guide the reasonable allocation of the circulating water to each branch user in the pipe network;

[0100] In some embodiments of the present invention, water quality indicators, circulating water quality indicators mainly include turbidity (generally controlled at ≤20NTU), total phosphorus content (generally controlled at 5.5-9.0mg / L), total alkalinity (generally controlled at ≥200mg / L), petroleum index (generally controlled at ≤10.0mg / L), COD index (generally controlled at ≤150mg / L), etc.;

[0101] In some embodiments of the present invention, the amount and ratio of the medicine added by the automatic dosing system are adjusted according to the change of the circulating water quality to ensure that the circulating water quality meets the standard. After multi-level and multi-angle energy-saving considerations, the energy consumption of circulating water is significantly reduced, and to a certain extent, the stable and long-term operation of the circulating water system is achieved.

[0102] Figure 2 It is a logical relationship diagram of a circulating water system operation optimization method in a preferred embodiment of the present invention.

[0103] like Figure 2 As shown, the circulating water system operation optimization method provided by the preferred embodiment is an integration of energy-saving and water-saving and management technologies of various circulating water systems. Specifically, it includes the following steps:

[0104] S1, obtain key parameters of the circulating water system, including: real-time data of process cooling temperature, real-time data of flow rate of water cooler tube or shell, real-time data of circulating water temperature difference, and real-time data of water quality index;

[0105] S2, constructing a pipeline network simulation model using key parameters, and obtaining real-time operating data of key parameters under pipeline network simulation;

[0106] S3, taking the control index or control standard of key parameters as the optimization target, optimize the real-time operation data of key parameters to obtain the best circulating water dosage, dosage and drug ratio;

[0107] S4, according to the optimal circulating water usage, dosage and drug ratio, output control signals to the flow control system and automatic dosing system of the circulating water system respectively, so as to optimize the operation of the circulating water system.

[0108] As a preferred embodiment, the integrated data includes process cooling temperature, tube side or shell side flow rate, circulating water temperature difference, water quality index, pipe network simulation operation data, automatic dosing data, and water supply flow data.

[0109] As a preferred embodiment, the process cooling temperature is from the perspective of the main production process materials. Since the circulating water system is an auxiliary system and serves the main production device, ensuring the process cooling requirements is the top priority. In this preferred embodiment, the process cooling temperature is controlled at 40-50°C;

[0110] As a preferred embodiment, the tube-side or shell-side flow rate refers to the flow rate of circulating water in the cooler. According to GB50050-2017 "Industrial Circulating Cooling Water Treatment Design Specification", when the circulating water flows through the tube side of the water cooler, the flow rate of the circulating water is controlled to be above 1.0m / s; when the circulating water flows through the shell side of the water cooler, the flow rate of the circulating water is controlled to be above 0.3m / s. If the flow rate is lower than the index flow rate, the cooler is prone to scaling; but the flow rate cannot be too high, which will increase the pressure drop of the circulating water system and may also cause overcooling of process materials (far below the required cooling temperature). In this preferred embodiment, the tube-side flow rate is between 1.0 and 1.5m / s, and the shell-side flow rate is between 0.3m / s and 0.45m / s.

[0111] As a preferred embodiment, the circulating water temperature difference is the difference between the circulating water inlet temperature and the outlet temperature of the circulating water cooler. If the temperature difference is too large, the outlet temperature may be too high, and the agent is easy to decompose; if the temperature difference is too small, the circulating water consumption is too large, resulting in water waste. In this preferred embodiment, the temperature difference is controlled to be no less than 6°C.

[0112] As a preferred embodiment, the water quality index reflects the balance between corrosion and scaling of the circulating water system, and is a parameter that must be controlled to ensure the safe, long-term and stable operation of the circulating water system. The circulating water quality index mainly includes turbidity, total phosphorus content, total alkalinity, petroleum index, COD, etc. In this preferred embodiment, the control range of the above indicators is: turbidity (generally controlled at ≤20NTU), total phosphorus content (generally controlled at 5.5-9.0mg / L), total alkalinity (generally controlled at ≥200mg / L), petroleum index (generally controlled at ≤10.0mg / L), COD index (generally controlled at ≤150mg / L).

[0113] As a preferred embodiment, the pipe network simulation model is based on the on-site survey data and the layout of the circulating water pipe network, using professional software to display the flow of circulating water in the pipe in real time, and calculate the pipe pressure drop Δp. Among them, λ represents the pipeline friction coefficient, L represents the pipeline length, D represents the pipeline inner diameter, and u represents the circulating water flow rate in the pipeline. According to the principle of equal pressure drop in parallel pipelines, it guides the reasonable allocation of circulating water in the pipeline network. This part is an important part of the optimized operation of the circulating water system, which can make the operation of the circulating water system transparent and help improve the management level.

[0114] As a preferred embodiment, the automatic dosing system is a unit for controlling the circulating water quality indicators. When a certain water quality indicator exceeds the standard value, the instruction is passed to the automatic dosing system after feedback, diagnosis, analysis and calculation. The automatic dosing system completes the work of dosing amount and drug ratio. This process flow is more time-effective than the current method based on manual analysis and calculation.

[0115] As a preferred embodiment, the process cooling temperature, tube or shell flow rate, circulating water temperature difference, water quality index, and real-time operation data of the pipe network simulation are used as input data. After diagnosis, analysis, and calculation, the dosage and drug ratio required by the automatic dosing system and the circulating water usage of the water supply flow system are provided in real time to achieve the purpose of energy saving and water saving and stable and long-term operation. Moreover, the above data are all calculated in real time, and the relevant data of the circulating water system are transparently displayed, which is conducive to improving the management level of the company's circulating water system, which is also more conducive to energy saving and water saving and stable and long-term operation of the circulating water system.

[0116] As a preferred embodiment, the process cooling temperature, water cooler tube or shell flow rate, circulating water temperature difference, pipe network simulation real-time operation data, and water quality indicators are integrated online to analyze and display the optimal circulating water volume, optimal dosage and drug ratio in real time.

[0117] Figure 3 A schematic diagram of the components of a circulating water system operation optimization system provided in one embodiment of the present invention.

[0118] like Figure 3 As shown, the circulating water system operation optimization system provided by this embodiment may include:

[0119] A key parameter acquisition module, which includes a process cooling temperature real-time data acquisition unit, a water cooler tube side or shell side flow rate real-time data acquisition unit, a circulating water temperature difference real-time data acquisition unit, and a water quality index real-time data acquisition unit, which are respectively used to obtain key parameters of the circulating water system;

[0120] A simulation data acquisition module, which uses key parameters to build a pipeline network simulation model and obtains real-time operating data of key parameters under pipeline network simulation;

[0121] Data processing module, which takes the control index or control standard of key parameters as the optimization target, optimizes the real-time operation data of key parameters, and obtains the best circulating water dosage, dosage and drug ratio;

[0122] The signal output module outputs control signals to the flow control system and automatic dosing system of the circulating water system according to the optimal circulating water usage, dosing amount and drug ratio, so as to optimize the operation of the circulating water system.

[0123] An embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it can be used to execute any method in the above embodiments, or to run any system in the above embodiments.

[0124] Optionally, the memory is used to store programs; the memory may include volatile memory (English: volatile memory), such as random-access memory (English: random-access memory, abbreviated: RAM), such as static random-access memory (English: static random-access memory, abbreviated: SRAM), double data rate synchronous dynamic random access memory (English: Double Data Rate Synchronous Dynamic Random Access Memory, abbreviated: DDR SDRAM), etc.; the memory may also include non-volatile memory (English: non-volatile memory), such as flash memory (English: flash memory). The memory is used to store computer programs (such as applications, functional modules, etc. that implement the above method), computer instructions, etc., and the above computer programs, computer instructions, etc. can be partitioned and stored in one or more memories. And the above computer programs, computer instructions, data, etc. can be called by the processor.

[0125] The above-mentioned computer programs, computer instructions, etc. may be stored in one or more memories in partitions, and the above-mentioned computer programs, computer instructions, data, etc. may be called by a processor.

[0126] The processor is used to execute the computer program stored in the memory to implement the various steps in the method involved in the above embodiment. For details, please refer to the relevant description in the above method embodiment.

[0127] The processor and the memory may be independent structures or integrated structures. When the processor and the memory are independent structures, the memory and the processor may be coupled and connected via a bus.

[0128] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, it can be used to execute any method in the above embodiments, or to run any system in the above embodiments.

[0129] The circulating water system operation optimization method, system, terminal and medium provided by the above-mentioned embodiments of the present invention combine water quality indicators with system energy saving and water saving, and convert them into online technology, so as to strengthen the management of the circulating water system and ensure the stable and long-term operation of the circulating water system; on the premise of ensuring the process cooling temperature, the reasonable tube side or shell side flow rate of the water cooler, and the reasonable circulating water temperature difference, the circulating water network simulation is carried out, and the above constraints, real-time operation data and water quality indicators are comprehensively processed to obtain the dosage and drug ratio of the automatic dosing system; the data are integrated and diagnosed and analyzed to realize the transparency of the circulating water system, improve the management level, and achieve the purpose of energy saving and water saving and long-term, complete and stable operation.

[0130] It should be noted that the steps in the method provided by the present invention can be implemented by using corresponding modules, devices, units, etc. in the system. Those skilled in the art can refer to the technical solution of the method to realize the composition of the system, that is, the embodiments in the method can be understood as preferred examples for constructing the system, which will not be elaborated here.

[0131] Those skilled in the art know that, in addition to implementing the system and its various devices provided by the present invention in a purely computer-readable program code, the system and its various devices provided by the present invention can be made to implement the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices provided by the present invention can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component; the devices for implementing various functions can also be considered as both software modules for implementing the method and structures within the hardware component.

[0132] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A method for optimizing the operation of a circulating water system, characterized in that: include: Obtain key parameters of the circulating water system, including: real-time data of process cooling temperature, real-time data of flow rate in the tube or shell of the water cooler, real-time data of circulating water temperature difference, and real-time data of water quality indicators; Using the key parameters to construct a pipeline network simulation model, and obtaining real-time operating data of the key parameters under pipeline network simulation; Taking the control index or control standard of the key parameter as the optimization target, the real-time operation data of the key parameter is optimized to obtain the optimal circulating water dosage, dosage and drug ratio; According to the optimal circulating water dosage, dosage and drug ratio, control signals are output to the flow control system and automatic drug adding system of the circulating water system respectively, so as to optimize the operation of the circulating water system.

2. The method for optimizing the operation of a circulating water system according to claim 1, characterized in that: The key parameters are used to construct a pipeline network simulation model, and real-time operation data of the key parameters under pipeline network simulation are obtained, including: According to the on-site survey data and the layout of the circulating water network, combined with the key parameters, a network simulation model is constructed; The flow of circulating water in the pipeline is simulated in real time through the pipeline network simulation model; According to the real-time simulation situation, the pipeline pressure drop is calculated, and the circulating water is guided to reasonably allocate the water volume of each branch user in the pipeline network, so as to obtain the real-time operation data of the key parameters under the pipeline network simulation situation.

3. The method for optimizing the operation of a circulating water system according to claim 2, characterized in that: The pipeline network simulation model is constructed using PIPENET pipeline network fluid analysis software.

4. The method for optimizing the operation of a circulating water system according to claim 1, characterized in that: Taking the control index or control standard of the key parameter as the optimization target, the real-time operation data of the key parameter is optimized to obtain the optimal circulating water dosage, dosage and drug ratio, including: Taking the circulating water flow rate of each branch, the dosage and the dosage ratio of each drug as independent variables, and the control index or control standard of the key parameters as constraints, the real-time operation data of the key parameters are optimized to obtain the optimal circulating water dosage, dosage and drug ratio.

5. The method for optimizing the operation of a circulating water system according to claim 4, characterized in that: The control indicators or control standards of the key parameters include: -Optimize the process cooling temperature to 40-50℃; -Optimize the flow rate of the water cooler tube or shell side to: When the circulating water flows through the tube of the water cooler, the flow rate of the circulating water is controlled to be above 1.0m / s; When circulating water flows through the shell side of the water cooler, the flow rate of circulating water is controlled above 0.3m / s; -Optimize the circulating water temperature difference to: above 6℃; - The water quality indicators include: turbidity, total phosphorus content, total alkalinity, petroleum index and COD index; among which: Optimize turbidity to: less than or equal to 20NTU; Optimize the total phosphorus content to: 5.5-9.0 mg / L; Optimize the total alkalinity to: greater than or equal to 200 mg / L; Optimize the petroleum index to: less than or equal to 10.0 mg / L; Optimize the COD index to: less than or equal to 150 mg / L.

6. The method for optimizing the operation of a circulating water system according to claim 4, characterized in that: The method uses the circulating water flow rate of each branch, the dosage and the dosage ratio as independent variables, and the control index or control standard of the key parameter as a constraint condition to optimize the real-time operation data of the key parameter, including: Obtain the circulating water flow of each branch; According to the circulating water flow of each branch, the total water volume Q required by the user is calculated as: Where D represents the inner diameter of each user branch pipeline in the circulating water network, u represents the circulating water flow rate of each user branch in the circulating water network, and the subscript number represents each user branch in the circulating water network; According to the control index or control standard of the key parameters, the amount of each drug added is calculated as: Among them, G r Indicates the amount of medicine added when the system is running, Q b Indicates the amount of sewage discharged, Q w It indicates the amount of wind loss, and g indicates the amount of medicine added per liter of circulating cooling water; The real-time operating data of the key parameters are optimized based on the total amount of water required by the user and the amount of each drug added.

7. A circulating water system operation optimization system, characterized in that: include: A key parameter acquisition module, which includes a process cooling temperature real-time data acquisition unit, a water cooler tube side or shell side flow rate real-time data acquisition unit, a circulating water temperature difference real-time data acquisition unit, and a water quality index real-time data acquisition unit, which are respectively used to obtain key parameters of the circulating water system; A simulation data acquisition module, which uses the key parameters to build a pipeline network simulation model and obtains real-time operating data of the key parameters under pipeline network simulation; A data processing module, which takes the control index or control standard of the key parameter as the optimization target, optimizes the real-time operation data of the key parameter, and obtains the best circulating water dosage, dosage and drug ratio; The signal output module outputs control signals to the flow control system and the automatic dosing system of the circulating water system according to the optimal circulating water consumption, dosing amount and drug ratio, so as to optimize the operation of the circulating water system.

8. A terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, it can be used to execute the method described in any one of claims 1 to 6, or to run the system described in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, it can be used to execute the method described in any one of claims 1 to 6, or to run the system described in claim 7.

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