Thermal power plant water affair optimization method and device based on chlorine element dynamic balance
By constructing a chlorine element transfer chain model and deploying instruments, combined with electrodialysis and nanofiltration technologies, precise control and dynamic adjustment of chloride ions in the water system of thermal power plants were achieved. This solved the problem of inaccurate chloride ion concentration control, improved water resource utilization, reduced wastewater treatment costs, and enhanced the stability and economy of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGXIA DATANG INT DABA POWER GENERATION CO LTD
- Filing Date
- 2025-12-26
- Publication Date
- 2026-04-21
AI Technical Summary
In the process of deep water conservation and comprehensive wastewater treatment in thermal power plants, the inaccurate control of chloride ion concentration leads to limited concentration ratio of circulating water system and failure to fully tap water-saving potential. The cost of treating high-salinity wastewater at the end is high and the system is unstable. Existing water management models lack water quality constraints and cannot achieve synergistic optimization of water quality and quantity.
A chlorine element transfer chain model was constructed, water metering instruments and chloride ion analysis instruments were deployed, data was collected in real time and uploaded to the monitoring system, dynamic equilibrium was calculated based on the law of conservation of mass, and the directional enrichment and separation of chloride ions was achieved by combining electrodialysis and nanofiltration technologies. The system operating parameters were dynamically adjusted to form a closed-loop management scheme.
It has achieved precise tracking and closed-loop management of chlorine throughout the plant, improved the efficiency of water resource recycling, reduced wastewater treatment load and operating costs, and enhanced the stability and economy of the system.
Smart Images
Figure CN121905327A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water treatment and pollutant control technology in thermal power plants, and in particular to a method, apparatus, equipment and storage medium for optimizing water treatment in thermal power plants based on dynamic balance of chlorine. Background Technology
[0002] In the production process of thermal power plants, the migration, transformation, and concentration control of chlorine is a critical issue that permeates the entire process and has a wide-ranging impact, directly restricting the plant's water conservation level and wastewater treatment efficiency. Specifically, the material selection and corrosion protection of key thermal equipment such as condensers are mainly based on the chloride ion concentration in the circulating water; the operation optimization of the circulating water system and the calculation and control of the concentration ratio also depend on the accurate monitoring of chloride ions; and the chloride ion concentration of the slurry in the desulfurization absorption tower is a key control indicator affecting the stable operation of the system, equipment corrosion, and gypsum quality. Therefore, the total amount of external chlorine input from multiple paths, including production water sources, coal combustion, and desulfurizing agents, directly determines the scale of high-salinity wastewater generation and subsequent treatment costs, making chlorine management a bottleneck in the water balance and zero-discharge wastewater system of thermal power plants.
[0003] Currently, thermal power plants are generally constrained by the concentration boundaries of chloride ions and their control methods in the process of promoting in-depth water conservation and comprehensive wastewater treatment, and face a series of common technical challenges: On the one hand, the conservative chloride concentration threshold set to protect equipment limits the space for increasing the concentration ratio of the circulating water system, resulting in the failure to fully tap the water-saving potential and the high water intake; on the other hand, the treatment of chlorinated wastewater often relies on a long process route with multiple series, which is complex and has high energy and material consumption. At the same time, the intermittent discharge of high-salinity wastewater can also easily cause fluctuations in the water balance system, resulting in high overall treatment costs.
[0004] Furthermore, existing water management models for thermal power plants are mostly built around "water balance," with their core objective typically limited to achieving a macro-level balance where "total water intake equals the sum of total water consumption and total wastewater discharge." These models generally lack the tracking and control of "water quality" factors, particularly key pollutants such as chloride ions, and fail to embed water quality constraints into the optimization logic of the water use process. Their function is limited to monitoring and comparing the total amount of influent and effluent, failing to guide the tiered utilization of water resources and the source control of pollutants from the perspective of water quality coupling. This results in water management models with simplistic strategies and insufficient guidance, making it difficult to support the refined and low-cost operation needs of thermal power plants under stringent environmental protection requirements. Therefore, developing a new water management method that can coordinate the balance of chloride migration and achieve synergistic optimization control of water quality and quantity is of urgent practical significance for improving water resource efficiency and reducing wastewater treatment costs in thermal power plants. Summary of the Invention
[0005] The present invention aims to at least partially solve one of the technical problems in the related art.
[0006] To address this, the present invention discloses a water management optimization method for thermal power plants based on dynamic chlorine balance. This method involves constructing a chlorine transfer chain model and quantifying the input and output paths; deploying instruments at key nodes to collect data in real time and uploading it to a monitoring system; calculating dynamic balance based on mass conservation; and coupling electrodialysis and nanofiltration technologies to achieve directional enrichment and separation of chloride ions; finally, dynamically adjusting system operating parameters based on the balance results to form a closed-loop chlorine management scheme covering source control and end-of-pipe treatment, thereby achieving synergistic optimization of water conservation and wastewater treatment.
[0007] Another objective of this invention is to propose a water management optimization device for thermal power plants based on the dynamic balance of chlorine.
[0008] The third objective of this invention is to provide a computer device.
[0009] A fourth objective of this invention is to provide a non-transitory computer-readable storage medium.
[0010] To achieve the above objectives, this invention proposes a method for optimizing water management in thermal power plants based on the dynamic balance of chlorine elements, comprising: S1. Construct a chlorine transfer chain model for thermal power plants, quantify the input path of exogenous chlorine-containing materials and the output path of chlorine, establish an input chlorine calculation module covering production water source, domestic water source, coal, air, and desulfurization limestone, and an output chlorine calculation module including ash, gypsum, clean flue gas emissions and sludge cake. S2 deploys water metering instruments and chloride ion analysis instruments to collect water volume and chloride ion concentration data in real time at each chlorine-containing material input node and key node of chlorine transfer path in the thermal power plant, and uploads the collected data to the power plant's SIS system through the built-in data model; S3 calculates the dynamic balance of chlorine input and output throughout the plant based on the law of conservation of mass, combines circulating water clean operation technology to improve the chlorine concentration threshold, and adopts chlorine-oriented enrichment-separation technology coupled with electrodialysis and nanofiltration processes to achieve precise control of chloride ion concentration in desulfurization wastewater. S4. Based on the dynamic balance calculation results and process optimization technology operating parameters, adjust the operation strategies of each water system in the thermal power plant. Through dynamic adjustment of the concentration ratio of the slag-water circulation system and bypass flue gas evaporation and solidification treatment, a water management scheme with closed-loop control of chlorine element is formed.
[0011] The water management optimization method for thermal power plants based on dynamic chlorine balance according to an embodiment of the present invention may also have the following additional technical features: In one embodiment of the present invention, constructing a chlorine element transfer chain model for a thermal power plant includes: S11, When quantifying the input path of external chlorine-containing materials, calculate the water intake from the production water source separately. With chlorine concentration Domestic water intake With chlorine concentration Coal consumption With chlorine mass fraction air volume With chlorine concentration Desulfurization limestone dosage With chlorine mass fraction The amount of chlorine input; S12, when quantifying the output path of chlorine, calculate the dry ash production separately. With chlorine mass fraction Dry residue production With chlorine mass fraction gypsum production With chlorine concentration Net flue gas volume With chlorine concentration Water content of mud cake With chlorine concentration The output chlorine content.
[0012] In one embodiment of the present invention, a water metering instrument and a chloride ion analyzer are deployed, including: S21 deploys chloride ion analyzers with an accuracy of 0.1 g / m³ in industrial water systems to collect real-time chlorine concentration data of circulating water. data; S22, a nanofiltration membrane flux monitoring module is deployed in the desulfurization wastewater treatment system to monitor the flux of the membrane. and The correlation model was used to calculate the chlorine enrichment efficiency.
[0013] In one embodiment of the present invention, the dynamic balance of chlorine input and output for the entire plant is calculated based on the law of conservation of mass, including: S31, using the formula to calculate the dynamic balance of input and output chlorine levels: k3 ; The input items contain 31 chlorine-related parameters, and the output items contain 18 chlorine-related parameters.
[0014] In one embodiment of the present invention, adjusting the operating strategy of various water systems in a thermal power plant includes: S41, based on the concentration ratio of the sludge-water circulation system The real-time monitoring value is used to dynamically adjust the water replenishment strategy within the range of 1.7-2.2. When the value exceeds 2.2, the bypass flue gas evaporation system is activated to perform chlorine-containing solution solidification treatment.
[0015] In one embodiment of the present invention, it further includes: S5, through the coupled treatment of electrodialysis and nanofiltration processes, reduces the chloride ion concentration in desulfurization wastewater. The concentration of chlorine in the solution is controlled within the threshold range of 15,000 g / m³, and the separated high-concentration chlorine solution is transported to the bypass flue gas evaporation system for solidification treatment, thereby reducing the amount of desulfurization wastewater treated by 50%.
[0016] To achieve the above objectives, another aspect of the present invention proposes a water management optimization device for thermal power plants based on dynamic chlorine balance, comprising: The chlorine element transfer chain modeling module is used to construct a chlorine element transfer chain model for thermal power plants, quantify the input path of exogenous chlorine-containing materials and the output path of chlorine, establish an input chlorine calculation module covering production water source, domestic water source, coal, air, and desulfurization limestone, and an output chlorine calculation module including ash, gypsum, clean flue gas emissions and sludge cake. The instrument deployment and data acquisition module is used to deploy water metering instruments and chloride ion analysis instruments. It collects water volume and chloride ion concentration data in real time at each chlorine-containing material input node and key node of chlorine transfer path in the thermal power plant, and uploads the collected data to the power plant SIS system through the built-in data model. The dynamic balance and process optimization module is used to calculate the dynamic balance of chlorine input and output throughout the plant based on the law of conservation of mass. It combines circulating water clean operation technology to improve the chlorine concentration threshold and adopts chlorine-oriented enrichment-separation technology coupled with electrodialysis and nanofiltration processes to achieve precise control of chloride ion concentration in desulfurization wastewater. The operation strategy adjustment module is used to adjust the operation strategies of various water systems in thermal power plants based on dynamic balance calculation results and process optimization technology operation parameters. Through dynamic adjustment of the concentration ratio of the slag-water circulation system and bypass flue gas evaporation and solidification treatment, a water management scheme with closed-loop control of chlorine element is formed.
[0017] In one embodiment of the present invention, it further includes: The electrodialysis and nanofiltration coupled treatment module is used to reduce the chloride ion concentration in desulfurization wastewater. The concentration of chlorine in the solution is controlled within the threshold range of 15,000 g / m³, and the separated high-concentration chlorine solution is transported to the bypass flue gas evaporation system for solidification treatment, thereby reducing the amount of desulfurization wastewater treated by 50%.
[0018] This invention discloses a method and apparatus for optimizing water management in thermal power plants based on dynamic chlorine balance. By constructing a chlorine transfer chain model and performing dynamic balance calculations throughout the entire process, it achieves precise tracking and closed-loop management of chlorine in the complex water systems of thermal power plants. This effectively solves the problems of traditional water management neglecting water quality constraints, extensive control, and high end-of-pipe treatment costs. By integrating and analyzing multi-path data on material input, process flow, and pollutant output, and coupling directional separation and evaporation solidification technologies, a collaborative optimization system from source control to end-of-pipe treatment is formed. This significantly improves the overall water resource recycling efficiency of the plant, reduces wastewater treatment load and operating costs, and enhances the stability and economy of the thermal power plant water system under stringent environmental protection requirements.
[0019] To achieve the above objectives, a third aspect of this application provides a computer device comprising a processor and a memory; wherein the processor reads executable program code stored in the memory to run a program corresponding to the executable program code, for implementing a thermal power plant water optimization method based on dynamic chlorine balance as described in the first aspect embodiment.
[0020] To achieve the above objectives, the fourth aspect of this application proposes a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a water management optimization method for thermal power plants based on dynamic chlorine balance as described in the first aspect embodiment.
[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a water management optimization method for thermal power plants based on dynamic balance of chlorine element according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the chlorine transfer chain in a water management model based on a deep water-saving method for optimizing water management in thermal power plants based on dynamic chlorine balance, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a water optimization device for thermal power plants based on dynamic balance of chlorine element according to an embodiment of the present invention. Figure 4 It is a computer device according to an embodiment of the present invention. Detailed Implementation
[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.
[0025] The following description, with reference to the accompanying drawings, describes a method, apparatus, equipment, and storage medium for optimizing water management in thermal power plants based on dynamic chlorine balance, according to embodiments of the present invention.
[0026] The core idea of this invention is to construct a dynamic chlorine transfer chain model covering the entire process of a thermal power plant. By quantifying the input of exogenous materials and the output of byproducts, a systematic tracking of chlorine migration and transformation is achieved. Based on this, monitoring instruments are deployed at key nodes and integrated into the plant-level monitoring system to form a real-time data acquisition network for chloride ion concentration and water flow. The dynamic balance of chlorine input and output is calculated based on the law of conservation of mass, and coupled with the optimization of circulating water system operation and electrodialysis-nanofiltration directional enrichment and separation technology, thereby achieving precise control of chloride ion concentration at key nodes such as desulfurization wastewater. Finally, based on the dynamic balance state and process parameters, the operating strategies of each water system are dynamically adjusted, and the final disposal of chlorine-containing waste is achieved through the evaporation and solidification of bypass flue gas. This constructs a closed-loop water management system for chlorine from source control and process optimization to end-of-pipe treatment, effectively improving water resource utilization and reducing wastewater treatment costs.
[0027] Example 1 To achieve the above invention, embodiments of the present invention provide a method for optimizing water management in thermal power plants based on dynamic balance of chlorine elements, such as... Figure 1 As shown, it includes: S1. Construct a chlorine transfer chain model for thermal power plants, quantify the input path of exogenous chlorine-containing materials and the output path of chlorine, establish an input chlorine calculation module covering production water source, domestic water source, coal, air, and desulfurization limestone, and an output chlorine calculation module including ash, gypsum, clean flue gas emissions, and sludge cake.
[0028] Specifically, based on the principle of conservation of matter, the model provides a multi-dimensional water management method for thermal power plants with chlorine as the core element by establishing mathematical expressions for input and output chlorine.
[0029] Specifically, the chlorine input calculation module covers five major sources: industrial water, domestic water, coal combustion, air, and desulfurization limestone. Among these, the chlorine input from industrial and domestic water sources is obtained through online metering instruments that measure the water intake volume. , Combined with the chloride concentration measured by the online chloride ion analyzer , The input chlorine quantity is calculated as follows: and The amount of chlorine input from coal is determined by the amount of coal used. With chlorine mass fraction Calculation, i.e. The chlorine input to the air and desulfurization limestone is determined by the air volume. With chlorine concentration Limestone dosage With chlorine mass fraction The calculation yielded the result.
[0030] Furthermore, the output chlorine calculation module includes pathways such as ash, gypsum, clean flue gas emissions, and sludge cake carryover. The chlorine output of dry ash and dry slag is determined by their production volume. , With chlorine mass fraction , Calculations; the chlorine output of gypsum is determined by its production. With chlorine concentration Confirmed. Chlorine output in clean flue gas is determined by flue gas flow rate. With chloride ion concentration Calculation. The chlorine content carried by the sludge cake is determined based on the moisture content of the sludge cake in each treatment system. , , The corresponding chlorine concentration was estimated.
[0031] Specifically, each module needs to be equipped with high-precision online monitoring equipment, such as conductivity meters and ion chromatographs, to ensure the real-time nature and accuracy of chlorine concentration data. Meanwhile, the concentration factor involved in the model... , These parameters need to be dynamically adjusted according to the actual operating conditions to reflect changes in the system's operating status.
[0032] Specifically, by analyzing the input-output balance of chlorine, regions of chlorine accumulation and loss pathways can be effectively identified, providing data support for optimizing circulating water systems, treating desulfurization wastewater, and reducing sludge volume. Its technological value lies in achieving coordinated management of water quality and quantity, improving water-saving efficiency, reducing wastewater treatment costs, and enhancing the safety and environmental friendliness of thermal power plant operations.
[0033] Furthermore, S1 includes: S11, When quantifying the input path of external chlorine-containing materials, calculate the water intake from the production water source separately. With chlorine concentration Domestic water intake With chlorine concentration Coal consumption With chlorine mass fraction air volume With chlorine concentration Desulfurization limestone dosage With chlorine mass fraction The amount of chlorine input.
[0034] Specifically, this step calculates the chlorine content in the main external input pathways, such as production water sources, domestic water sources, coal combustion, air, and desulfurization limestone, to accurately assess the total chlorine input of the thermal power plant, providing basic data support for subsequent chlorine transfer path modeling and water management optimization.
[0035] Specifically, this step employs the principle of conservation of mass to calculate the chlorine content for each input path. Specifically, the water intake from the production water source is denoted as... The unit is Its chloride ion concentration is The unit is The water intake for domestic use is... The chloride ion concentration is Coal consumption by The unit is chlorine mass fraction. The unit is %. Air volume by This indicates that the chlorine concentration in the air is... Desulfurization limestone dosage by The unit is chlorine mass fraction. The unit is %. By multiplying the water or material quantity of each of the above input paths by the corresponding chlorine concentration or mass fraction, the chlorine input of each path can be obtained, thereby realizing the quantitative analysis of the chlorine input of the entire plant.
[0036] Furthermore, this step requires real-time monitoring or periodic sampling and analysis of the water intake, chlorine concentration, or mass fraction at each input path to ensure data accuracy and representativeness. For example, the chlorine mass fraction in coal is typically obtained through coal quality analysis, while the chlorine concentration in the air is determined according to ambient air quality standards. In addition, the units for all parameters must be standardized. This is to facilitate subsequent chlorine balance calculations.
[0037] Specifically, this step is widely used in the water management system of thermal power plants, especially in the implementation of deep water conservation and comprehensive wastewater treatment, providing a data foundation for the whole-process tracking and control of chlorine. By accurately quantifying the input of external chlorine, the main sources of chlorine can be effectively identified, providing a scientific basis for optimizing the operation of the circulating water system, controlling the discharge of desulfurization wastewater, and reducing the cost of treating high-salinity wastewater.
[0038] Specifically, this step enables the systematic identification and quantification of chlorine input pathways in thermal power plants, providing crucial input data for constructing a plant-wide chlorine balance model. In practical applications, this method helps improve the precision of water management, achieve dynamic balance control of chlorine, and thus promote comprehensive optimization of thermal power plants in terms of water conservation, energy saving, environmental protection, and operational safety.
[0039] S12, when quantifying the output path of chlorine, calculate the dry ash production separately. With chlorine mass fraction Dry residue production With chlorine mass fraction gypsum production With chlorine concentration Net flue gas volume With chlorine concentration Water content of mud cake With chlorine concentration The output chlorine content.
[0040] Specifically, this step calculates the amount of chlorine carried in the main output paths, such as dry ash, dry slag, gypsum, clean flue gas, and mud cake, thereby achieving accurate modeling and dynamic tracking of the chlorine transfer process in thermal power plants.
[0041] Specifically, this step, based on the principle of conservation of mass, calculates the chlorine content for each output path. Specifically, for the dry ash path, the output chlorine content is the dry ash production. The mass fraction of chlorine in dry ash The product of, i.e. Similarly, the output chlorine content of the dry slag path is... The output chlorine content of the gypsum path is The output chlorine content of the clean flue gas path is The output chlorine content of the mud cake carrying path is These calculations are all based on online monitoring systems or built-in model parameters, with relevant data collected and uploaded in real time through the power plant's SIS system.
[0042] Furthermore, the calculation of each output path relies on clearly defined physical quantity units and concentration parameters. For example, dry ash production... Usually Unit: Chlorine mass fraction Gypsum production, expressed as a percentage (%) In tons per hour ( The chlorine concentration is expressed in units of ) In grams per ton ( (This refers to the net flue gas volume.) by chlorine concentration (unit: ) by It is important to pay attention to the accuracy of unit conversions.
[0043] Specifically, this step is widely used in the water management system of thermal power plants, especially in key areas such as desulfurization wastewater treatment, circulating water concentration control, sludge dewatering, and flue gas purification. Quantitative analysis of chlorine levels in each output path provides data support for the targeted enrichment and separation of chlorine, thereby optimizing the desulfurization wastewater treatment process and reducing the discharge and treatment costs of high-salinity wastewater.
[0044] Specifically, by precisely quantifying the distribution of chlorine in each output path, real-time monitoring and control of the dynamic balance of chlorine throughout the plant can be achieved. Its innovation lies in integrating water quality and quantity parameters into a unified water management model, providing thermal power plants with a deep water-saving and wastewater reduction solution based on chlorine transfer, resulting in significant energy-saving, environmental, and economic benefits.
[0045] S2 deploys water metering instruments and chloride ion analysis instruments to collect water volume and chloride ion concentration data in real time at each chlorine-containing material input node and key node of the chlorine transfer path in the thermal power plant, and uploads the collected data to the power plant's SIS system through a built-in data model.
[0046] Specifically, this step involves installing high-precision online monitoring equipment at various chlorine-containing material input nodes (such as industrial water sources, domestic water sources, coal combustion, air, desulfurization limestone, etc.) and key nodes in the chlorine transfer path (such as circulating water systems, desulfurization wastewater treatment systems, sludge discharge systems, etc.) to collect water volume and chloride ion concentration data in real time, thereby providing basic input parameters for subsequent water management models.
[0047] Furthermore, water flow meters typically employ electromagnetic or ultrasonic flow meters, achieving a measurement accuracy within ±0.5%, suitable for flow monitoring under varying water quality conditions in thermal power plants. Chloride ion analyzers utilize ion-selective electrode or conductivity methods, possessing online continuous monitoring capabilities, with a measurement range generally ranging from [missing information - likely a range in Chinese characters]. Resolution can reach This system meets the monitoring needs of high-salinity wastewater in thermal power plants. Instrument data is uploaded in real time to the power plant's Supervisory Information System (SIS) via industrial communication protocols such as Modbus TCP / IP or OPC UA.
[0048] Furthermore, before being uploaded, the instrument data can undergo preliminary processing using the built-in data model, for example, based on the concentration ratio. , The chloride ion concentration is corrected using parameters to improve the accuracy and representativeness of the data. This step ensures the real-time quantification of chlorine input and output across the entire plant, providing reliable data support for the subsequent chlorine balance model based on the principle of mass conservation (as shown in Equation 1).
[0049] Specifically, this step is widely applicable to circulating water systems, desulfurization systems, and ash treatment systems in thermal power plants, playing a particularly important role in the treatment and reuse of high-salinity wastewater. Through real-time monitoring and data uploading, dynamic tracking and control of chlorine transfer pathways can be achieved, thereby optimizing water use structure, reducing desalination load, and improving overall water management efficiency.
[0050] Specifically, through precise data collection and transmission, the necessary data foundation is provided for thermal power plants to build a multi-dimensional water management model based on chlorine element transfer, which helps to achieve deep water conservation, reduce treatment costs and improve operational safety.
[0051] Furthermore, S2 includes: S21 deploys chloride ion analyzers with an accuracy of 0.1 g / m³ in industrial water systems to collect real-time chlorine concentration data of circulating water. data.
[0052] Specifically, this step aims to control the chloride ion concentration in the circulating water. The high-precision, real-time acquisition provides reliable data input for the dynamic balance model of chlorine in the entire plant, thereby supporting the refined control and optimized operation of the water system.
[0053] Specifically, this chloride ion analyzer typically employs ion-selective electrode (ISE) or conductivity-ion chromatography coupled with other techniques, offering high sensitivity and strong anti-interference capabilities. The instrument is installed in the main loop or key branches of the circulating water system, such as the cooling tower outlet or condenser inlet, ensuring representativeness of the sampling points. Its sampling frequency can be set to more than once per minute to meet real-time monitoring requirements. The instrument's output signal is connected to the power plant's Supervisory Information System (SIS) via 4-20mA or RS485 / Modbus protocol for centralized data acquisition and processing.
[0054] Furthermore, the instrument's detection accuracy must reach 0.1 g / m³ (i.e., 100 mg / L), complying with the requirements for monitoring chloride ion concentration in circulating water as specified in GB / T 15453-2018 "Determination of Chloride in Water - Silver Nitrate Titration Method" and DL / T 651-2017 "Guidelines for Circulating Cooling Water Treatment in Thermal Power Plants". Simultaneously, the instrument's measurement range should cover 0-5000 mg / L to accommodate chloride ion concentration variations under different operating conditions. The instrument's response time should be less than 30 seconds to ensure data timeliness.
[0055] Specifically, this step is widely used in the circulating water systems, desulfurization wastewater treatment systems, and sludge return systems of thermal power plants. Through real-time monitoring... It can dynamically assess the concentration ratio of circulating water, corrosion risk, and chemical dosing strategies, providing data support for system operation. For example, in a circulating water system, if the chloride ion concentration exceeds a set threshold (such as 2000 mg / L), it can trigger the water replenishment or sewage discharge control logic to prevent equipment corrosion and scaling.
[0056] Specifically, the technical value of this step lies in providing key input parameters for the plant-wide chlorine balance model, enabling the model to accurately calculate the input and output of chlorine based on the principle of mass conservation. Combined with other online instruments and built-in model parameters, it allows for coordinated management of the power plant's water system across multiple dimensions, including water quality, quantity, and energy consumption, thereby improving water-saving efficiency, reducing end-of-pipe wastewater treatment costs, and enhancing the stability and sustainability of system operation.
[0057] S22, a nanofiltration membrane flux monitoring module is deployed in the desulfurization wastewater treatment system to monitor the flux of the membrane. and The correlation model was used to calculate the chlorine enrichment efficiency.
[0058] Specifically, this step is based on the principle of conservation of matter. By quantifying the input and output relationship of chlorine in the desulfurization wastewater treatment system, it provides key data support for the deep water conservation and wastewater treatment of thermal power plants.
[0059] Specifically, the nanofiltration membrane flux monitoring module is typically integrated into the effluent pipeline of the desulfurization wastewater treatment system, using a high-precision mass flow meter and an online chloride ion analyzer (such as ion-selective electrode method or conductivity method) for simultaneous measurement. The flow meter's measurement accuracy should be no less than ±1%, and the chloride ion analyzer's detection range is... Resolution can reach This ensures accurate monitoring of high-salinity wastewater. Monitoring data is collected via PLC or DCS systems and uploaded to the power plant's SIS system for centralized data management and model input.
[0060] Furthermore, This indicates the net effluent volume of the desulfurization wastewater treatment system, in units of... Its value is affected by factors such as nanofiltration membrane flux, operating pressure, temperature and influent water quality; This indicates the chloride ion concentration in desulfurization wastewater, in units of... The changes in these two parameters directly reflect the enrichment or removal of chlorine in the system. By collecting these parameters in real time and calculating them using a model, the enrichment efficiency of chlorine in nanofiltration membrane treatment can be evaluated, providing an optimization basis for subsequent advanced treatment processes such as electrodialysis and reverse osmosis.
[0061] Specifically, this step is applicable to desulfurization wastewater treatment systems in thermal power plants, particularly in scenarios employing nanofiltration-reverse osmosis coupled processes. Through continuous monitoring and model feedback, the operating parameters of the nanofiltration membrane (such as transmembrane pressure difference, influent pH, and temperature) can be dynamically adjusted to improve chloride ion rejection and reduce subsequent treatment load. Furthermore, this module can also be used to evaluate the operational stability and water quality compliance of the desulfurization wastewater treatment system, providing key data nodes for achieving plant-wide chloride balance.
[0062] Specifically, by quantifying the chlorine transfer behavior in the desulfurization wastewater treatment system, precise control of chlorine enrichment efficiency is achieved, thereby reducing the treatment cost of high-salinity wastewater at the end and improving the scientific rigor and practicality of the overall water management model. Combined with the plant-wide chlorine balance model, this module constructs a multi-dimensional water management system centered on water quality for thermal power plants, promoting the achievement of deep water conservation and green operation goals.
[0063] S3 calculates the dynamic balance of chlorine input and output throughout the plant based on the law of conservation of mass, combines circulating water clean operation technology to improve the chlorine concentration threshold, and adopts a chlorine-oriented enrichment-separation technology that couples electrodialysis and nanofiltration processes to achieve precise control of chloride ion concentration in desulfurization wastewater.
[0064] Specifically, the technical principle behind this step is to establish a chlorine quality balance relationship for the entire plant by quantitatively analyzing the input and output paths of chlorine in each process of a thermal power plant, thereby providing a scientific basis for water management.
[0065] Specifically, the mass flow rate of chlorine element input from various external sources throughout the plant, such as water sources, coal combustion, air, and desulfurization limestone, is first collected using online metering instruments and a chloride ion analyzer. This includes the water intake from the production water source. With chlorine concentration Domestic water intake With chlorine concentration Coal consumption With chlorine mass fraction Simultaneously, monitor the chlorine mass flow rate of each output path, such as dry ash, dry slag, gypsum, clean flue gas, sludge cake carryover, and circulating water evaporation, as well as the chlorine mass fraction in dry ash. Chlorine concentration in gypsum chlorine concentration in clean flue gas By substituting the above input and output parameters into the chlorine element mass balance formula shown in Equation 1, a dynamic balance analysis of chlorine elements throughout the plant can be achieved.
[0066] Furthermore, this step introduces circulating water clean operation technology, using composite agents to achieve scale inhibition, neutral scale dissolution, and corrosion prevention, thereby increasing the chloride ion tolerance threshold in the circulating water system and reducing system corrosion and scaling problems caused by excessive chloride concentration. In the desulfurization wastewater treatment stage, a coupled technology of electrodialysis and nanofiltration is employed to achieve the targeted enrichment and separation of chloride. Electrodialysis is used for the initial enrichment of high-concentration chloride ion solutions, while nanofiltration is used for further separation of other ions, thus reducing the chloride ion concentration in the desulfurization wastewater from... Once the concentration of chlorine is reduced to an acceptable level, the separated high-concentration chlorine solution can be introduced into the bypass flue gas evaporation system for solidification treatment.
[0067] Specifically, the calculation of total chlorine involves multiple variables, such as the chlorine content of coal. Chlorine mass fraction of desulfurized limestone chlorine concentration in clean flue gas The total output chlorine includes chlorine carried over by solids, emitted from flue gas, and effluent from wastewater treatment systems, such as the effluent from desulfurization wastewater treatment systems. Its chlorine concentration It can be controlled through model adjustment.
[0068] Specifically, this step is applicable to the water management system of thermal power plants, and has significant advantages, particularly in deep water conservation and high-salinity wastewater treatment. Through real-time monitoring and dynamic balance calculations, the operating parameters of the circulating water system can be optimized, the amount of desulfurization wastewater generated can be reduced, and the efficient recovery and treatment of chloride ions can be achieved through targeted enrichment-separation technology, thereby reducing wastewater treatment costs and improving the stability and safety of system operation.
[0069] Specifically, the technical benefits of this step are reflected in achieving dynamic balance control of chlorine levels throughout the plant, with the imbalance rate controlled within 0.5%, indicating that the model has good accuracy and practicality. Simultaneously, by precisely controlling the chloride ion concentration in desulfurization wastewater, the service life of equipment can be effectively extended, corrosion risks reduced, and technical support provided for the green and low-carbon operation of thermal power plants.
[0070] Furthermore, S3 includes: S31, using the formula to calculate the dynamic balance of input and output chlorine levels: k3 ; The input items contain 31 chlorine-related parameters, and the output items contain 18 chlorine-related parameters.
[0071] Specifically, this formula provides a water management method for thermal power plants based on chlorine transfer by systematically modeling the source and destination of chlorine in each process step, which has significant water-saving and emission reduction benefits.
[0072] Specifically, this formula constructs a mass balance relationship for chlorine by collecting the flow rate and chloride ion concentration of chlorine-containing materials in various systems of a thermal power plant, and combining this with the chlorine mass fraction of solid materials such as coal and limestone. Specifically, inputs include external chlorine inputs such as industrial water, domestic water, coal, air, and desulfurization limestone, while outputs cover the emission and transfer paths of chlorine, including dry ash, dry slag, gypsum, clean flue gas, sludge cake carryover, and circulating water. Each input and output is calculated in the form of "mass flow rate × concentration" or "mass × mass fraction," ultimately achieving a dynamic balance of chlorine throughout the plant.
[0073] Furthermore, the key parameters involved in the formula include: industrial water intake. Chloride ion concentration Coal consumption and its chlorine mass fraction Desulfurization limestone dosage and its chlorine mass fraction These parameters need to be collected and calculated in real time using online monitoring instruments or built-in models, and their units cover... , , %, etc., which comply with the industry standards for water management in thermal power plants.
[0074] Specifically, this formula can be embedded in the SIS (Plant-level Monitoring Information System) of a thermal power plant to calculate and monitor the total input and output of chlorine in the entire plant in real time. By incorporating the chlorine transfer paths of each system into a unified model, dynamic control of key indicators such as circulating water concentration ratio, desulfurization wastewater treatment volume, and chlorine content in sludge can be achieved, thereby optimizing water system operation, reducing high-salinity wastewater discharge, and lowering treatment costs.
[0075] Specifically, by constructing a dynamic balance model of chlorine across the entire power plant, optimized management of water usage processes in thermal power plants was achieved from a water quality perspective. In the embodiment, the imbalance rate between the total input and output chlorine was only 0.5%, indicating that the model has good accuracy and stability. This model not only improves the water-saving capacity of thermal power plants but also provides a scientific basis for chlorine reduction control and process optimization, demonstrating significant engineering application value and environmental benefits.
[0076] S4. Based on the dynamic balance calculation results and process optimization technology operating parameters, adjust the operation strategies of each water system in the thermal power plant. Through dynamic adjustment of the concentration ratio of the slag-water circulation system and bypass flue gas evaporation and solidification treatment, a water management scheme with closed-loop control of chlorine element is formed.
[0077] Specifically, this step is based on a quantitative analysis model of the entire plant's chlorine transfer chain (as shown in Figure 1 in the technical disclosure document). By real-time monitoring and calculation of the total input and output of chloride ions in each water system, combined with the optimization and adjustment of process operating parameters, dynamic control of the power plant's water system is achieved.
[0078] Specifically, this step first involves collecting water volume and chlorine concentration data from various water systems, including industrial water, domestic water, desulfurization wastewater, purified flue gas, dry ash, dry slag, and gypsum, using online metering instruments and chloride ion analyzers. According to the principle of conservation of mass, the total input chlorine should equal the total output chlorine, i.e.: .
[0079] Furthermore, in actual operation, the concentration ratio of the slag-water circulation system... These are key control parameters, typically set to... By adjusting the circulating water return ratio and discharge volume, dynamic control of chloride ion concentration is achieved. Simultaneously, bypass flue gas evaporation and solidification technology is employed to directionally enrich and separate chlorine from desulfurization wastewater. A high-concentration chloride ion solution is fed into the flue gas evaporation system, where high-temperature flue gas is used to solidify the chlorine, thereby reducing the discharge of high-salinity wastewater at the end of the process.
[0080] Specifically, this step has significant technical value in the water management of thermal power plants. It not only improves the tracking accuracy of chlorine, but also effectively reduces the cost of desulfurization wastewater treatment and improves the operating efficiency of the circulating water system. Through closed-loop control, the stable operation of the entire plant's water balance system can be achieved, providing data support and strategic guidance for in-depth water conservation and green operation.
[0081] Furthermore, S4 includes: S41, based on the concentration ratio of the sludge-water circulation system The real-time monitoring value is used to dynamically adjust the water replenishment strategy within the range of 1.7-2.2. When the value exceeds 2.2, the bypass flue gas evaporation system is activated to perform chlorine-containing solution solidification treatment.
[0082] Specifically, this step involves closed-loop feedback control based on the transfer path of chlorine in the water system of a thermal power plant, and data is obtained through an online monitoring system. The system uses real-time data, combined with preset chlorine concentration thresholds and system operating parameters, to achieve intelligent adjustment of the water supply flow.
[0083] Specifically, the concentration ratio of the sludge-water circulation system Defined as the ratio of chloride ion concentration in the circulating water to the chloride ion concentration in the makeup water, i.e. ,in This refers to the chloride ion concentration in the circulating water. To adjust the chloride ion concentration in the makeup water, the system uses an online conductivity meter and ion-selective electrode method to monitor the chloride ion concentration in both circulating and makeup water in real time during operation. Combined with flow meter data, it calculates the current concentration ratio. .
[0084] Furthermore, when When the concentration exceeds the set upper limit of 2.2, it indicates that the chloride ion accumulation in the system is approaching the equipment's tolerance limit, which may lead to corrosion or scaling problems. At this time, the control system will automatically activate the bypass flue gas evaporation system, introducing the high-chlorine wastewater into the flue gas evaporation device. The high-temperature flue gas will then evaporate and solidify the chlorine-containing solution, thereby achieving the targeted transfer and removal of chlorine. During system operation, it is necessary to ensure that the flue gas temperature is not lower than [a certain value]. And the flue pressure is stable at Within a certain range, to ensure evaporation efficiency and system safety.
[0085] Specifically, on the one hand, by implementing a dynamic water replenishment strategy, the chloride ion concentration in the circulating water system can be effectively controlled, avoiding equipment corrosion and operational risks caused by excessive chloride concentration. On the other hand, combined with the start-up mechanism of the bypass flue gas evaporation system, the resource-based treatment of high-salinity wastewater is realized, reducing the end-of-pipe wastewater treatment load and improving the overall stability and sustainability of the water system. In practical applications, this control logic can be integrated into the power plant's SIS system or DCS control platform to achieve automated operation and real-time response, providing strong support for the deep water conservation and green operation of thermal power plants.
[0086] S5, through the coupled treatment of electrodialysis and nanofiltration processes, reduces the chloride ion concentration in desulfurization wastewater. The concentration of chlorine in the solution is controlled within the threshold range of 15,000 g / m³, and the separated high-concentration chlorine solution is transported to the bypass flue gas evaporation system for solidification treatment, thereby reducing the amount of desulfurization wastewater treated by 50%.
[0087] Specifically, this step is a core component of the directional enrichment and separation technology of chlorine in this invention, and plays a key role in achieving dynamic balance of chlorine in thermal power plants and deep water conservation.
[0088] Furthermore, the electrodialysis process applies a direct current electric field and utilizes the selective permeability of ion exchange membranes to remove chloride ions (Cl-) from desulfurization wastewater. -The chloride ions migrate from the low concentration side to the high concentration side, achieving initial enrichment. Subsequently, the nanofiltration process, driven by pressure, further separates chloride ions and other soluble salts from the solution, with a typical molecular weight cutoff range of [missing value]. It exhibits a high rejection rate for divalent ions, making it suitable for the efficient separation of chloride ions. In the coupled system, electrodialysis is used for pre-concentration, while nanofiltration is used for fine separation; their synergistic effect significantly improves the separation efficiency of chloride ions and the system stability.
[0089] Furthermore, the operating current density of electrodialysis is generally controlled at... The pressure drop of the membrane stack does not exceed This is to ensure a balance between system operating efficiency and energy consumption. The operating pressure of nanofiltration processes is typically [insert pressure here]. The recovery rate can reach The chloride ion retention rate can reach over 90%. Ultimately, the chloride ion concentration in the desulfurization wastewater... Stable control at Within the specified range, the water inlet requirements for subsequent curing treatment are met.
[0090] Specifically, this coupling process is suitable for desulfurization wastewater treatment systems in thermal power plants, especially under conditions of large volumes of high-salinity wastewater and frequent fluctuations in chloride ion concentration. By transporting a high-concentration chlorine-containing solution to a bypass flue gas evaporation system, the solution is evaporated and crystallized using high-temperature flue gas, achieving the solidification and resource utilization of chlorine and reducing the pressure on end-of-pipe wastewater treatment.
[0091] Specifically, by selectively enriching and separating chloride ions, the amount of desulfurization wastewater treated is effectively reduced, achieving water conservation goals while improving the controllability and traceability of chlorine. Combined with a plant-wide chlorine balance model, this step provides crucial support for achieving dynamic chlorine balance in thermal power plants, demonstrating significant energy-saving, environmental, and economic value.
[0092] This invention discloses a water management optimization method for thermal power plants based on dynamic chlorine balance. By constructing a chlorine transfer chain model and performing dynamic balance calculations throughout the entire process, it achieves precise tracking and closed-loop management of chlorine in the complex water systems of thermal power plants. This effectively solves the problems of traditional water management neglecting water quality constraints, extensive control, and high end-of-pipe treatment costs. This method integrates and analyzes multi-path data on material input, process flow, and pollutant output, and couples directional separation and evaporation solidification technologies to form a collaborative optimization system from source control to end-of-pipe treatment. This significantly improves the overall plant water resource recycling efficiency, reduces wastewater treatment load and operating costs, and enhances the stability and economy of the thermal power plant water system under stringent environmental protection requirements.
[0093] Example 2 To achieve the above invention, embodiments of the present invention also provide a water management model based on a deep water-saving method for optimizing water management in thermal power plants based on dynamic chlorine balance, such as... Figure 2 As shown, it includes: Based on the optimization of water use processes in thermal power plants using circulating water clean operation technology and directional enrichment-separation technology for chlorine in desulfurization wastewater, embodiments of the present invention construct a schematic diagram of the chlorine transfer chain based on a deep water-saving water management model (e.g., Figure 2 As shown in the figure, a plant-wide chlorine balance model (Equation 1) based on chlorine element transfer is formed, as detailed below: Specifically, the circulating water clean operation technology mainly refers to the use of a composite agent that combines scale inhibition, neutral scale dissolution, and corrosion prevention functions to maintain the clean operation of the circulating water system. Based on this, the chlorine concentration threshold of the predetermined material is increased, the circulating water discharge is significantly reduced, and the circulating water is treated without desalination, achieving high efficiency, energy saving, and deep water saving and emission reduction. The chlorine element targeted enrichment-separation technology mainly refers to the use of electrodialysis, reverse osmosis, thermal concentration technology and other technologies coupled with nanofiltration process to first enrich and then separate the chlorine element in the desulfurization wastewater. The high-concentration chlorine-containing solution after separation enters the bypass flue gas evaporation system for solidification treatment.
[0094] Furthermore, chlorine-containing materials in thermal power plants mainly originate from coal combustion and water sources, while air and desulfurization limestone also contribute some chlorine. Chlorine output pathways include end-of-pipe high-salinity wastewater treatment (primarily desulfurization wastewater), production and domestic water consumption, flue gas purification, and transport by solids such as sludge, ash, and gypsum. In actual operation, corresponding online water flow meters and online chloride ion analyzers are installed at each source of chlorine-containing materials and along each chlorine transfer path. The relevant data is then uploaded to the power plant's SIS system, either directly or through built-in data models.
[0095] According to the law of conservation of mass, the total amount of chlorine input from external chlorine-containing materials should be balanced with the total amount of chlorine output, that is: k3 (Equation 1) In Formula 1: the input chlorine includes: —Water intake from production water source, m 3 / h; —Chlorine concentration in production water source, g / m³ 3 ; —Water intake for domestic water sources, m 3 / h; —Chlorine concentration in domestic water sources, g / m³ 3 ; —Coal consumption, 10 6 g / h; —Chlorine content in coal, % —Air volume, m 3 / h; —Chlorine concentration in the air, g / m³ 3 ; —Desulfurization limestone dosage, 10 6 g / h; —Chlorine content in limestone, by mass fraction, %; Output chlorine includes: —Dry ash production, 10 6 g / h; —Chlorine content (mass fraction) in dry ash, % —Dry residue yield, 10 6 g / h; —Chlorine content in dry residue, % (%) —Gypsum production, t / h; —Chlorine concentration in gypsum, g / t; —Net flue gas volume, m 3 / h; —Chlorine concentration in clean flue gas, g / m³ 3 ; —Moisture content of sludge cake in the raw water pretreatment system, m 3 / h; —Moisture content of sludge cake in domestic sewage treatment system, m 3 / h; , —representing industrial water and domestic water consumption, in m 3 / h; —Wind loss, m 3 / h; —Chronicity concentration in circulating water, g / m³ 3 ; —Moisture content of sludge cake in industrial wastewater treatment systems, m 3 / h; —Chlorine concentration in industrial wastewater, g / m³ 3 ; —Water replenishment for coal conveying system, m 3 / h; —Water makeup water for wet sludge removal system, m 3 / h; k2—Concentration factor of the sludge-water circulation system, generally 1.7~2.2 times; —Moisture content of sludge cake in desulfurization wastewater treatment system, m 3 / h; k3—Chlorine content in fly ash, % —Chloride ion concentration in desulfurization wastewater, g / m³ 3 ; —Flow rate of desulfurization wastewater treatment system, m 3 / h.
[0096] This invention discloses a water management model for thermal power plants based on dynamic chlorine balance. By constructing this model and integrating chlorine-oriented enrichment and separation processes, it achieves systematic tracking and closed-loop control of chlorine throughout the entire power plant process. This effectively overcomes the limitations of traditional models, which neglect water quality correlation, employ extensive control methods, and struggle to achieve source reduction. The method combines circulating water operation optimization, deep wastewater treatment, and material balance calculations, forming a collaborative management mechanism from external input control and process transfer optimization to end-of-pipe solidification treatment. This significantly improves the overall water resource recycling efficiency and chlorine pollution control capabilities of the plant, reducing overall operating costs while achieving deep water conservation goals and enhancing the environmental adaptability and long-term operational stability of the power plant's water system.
[0097] Example 3 To achieve the above invention, such as Figure 3 As shown, this embodiment also provides a water management optimization device 10 for thermal power plants based on dynamic chlorine balance. The device 10 includes: The chlorine element transfer chain modeling module 100 is used to construct a chlorine element transfer chain model for thermal power plants, quantify the input path of exogenous chlorine-containing materials and the output path of chlorine, establish an input chlorine calculation module covering production water source, domestic water source, coal, air, and desulfurization limestone, and an output chlorine calculation module including ash, gypsum, clean flue gas emissions and sludge cake.
[0098] The instrument deployment and data acquisition module 200 is used to deploy water metering instruments and chloride ion analysis instruments. It collects water volume and chloride ion concentration data in real time at each chlorine-containing material input node and key node of the chlorine transfer path in the thermal power plant, and uploads the collected data to the power plant SIS system through the built-in data model.
[0099] The Dynamic Balance and Process Optimization Module 300 is used to calculate the dynamic balance of chlorine input and output throughout the plant based on the law of conservation of mass. It combines circulating water clean operation technology to improve the chlorine concentration threshold and adopts chlorine-oriented enrichment-separation technology coupled with electrodialysis and nanofiltration processes to achieve precise control of chloride ion concentration in desulfurization wastewater. The operation strategy adjustment module 400 is used to adjust the operation strategies of various water systems in thermal power plants based on dynamic balance calculation results and process optimization technology operation parameters. Through dynamic adjustment of the concentration ratio of the slag-water circulation system and bypass flue gas evaporation and solidification treatment, a water management scheme with closed-loop control of chlorine element is formed.
[0100] In one embodiment of the present invention, it further includes: an electrodialysis and nanofiltration coupled processing module, used to reduce the chloride ion concentration in desulfurization wastewater. The concentration of chlorine in the solution is controlled within the threshold range of 15,000 g / m³, and the separated high-concentration chlorine solution is transported to the bypass flue gas evaporation system for solidification treatment, thereby reducing the amount of desulfurization wastewater treated by 50%.
[0101] This invention discloses a multi-level collaborative prediction device for battery pack health status and lifespan. By constructing a multi-level dynamic graph model and an attribute decoupling encoding mechanism, it effectively solves the problem of insufficient prediction accuracy caused by hierarchical isolation and feature aliasing in traditional methods. This device achieves end-to-end collaborative modeling from spatial topology construction and feature decoupling to cross-layer information fusion, significantly improving the accuracy and consistency of health status and lifespan prediction. Modular design enhances the system's engineering applicability and adaptability, providing a more reliable solution for battery management system status assessment and lifespan prediction.
[0102] To implement the methods of the above embodiments, the present invention also provides a computer device, such as... Figure 4 As shown, the computer device 600 includes a memory 601 and a processor 602; wherein, the processor 602 reads the executable program code stored in the memory 601 to run a program corresponding to the executable program code, so as to implement the various steps of the above-described method for optimizing water affairs in thermal power plants based on dynamic balance of chlorine element.
[0103] To implement the above embodiments, this application also proposes a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a water management optimization method for thermal power plants based on dynamic balance of chlorine as described in the foregoing embodiments.
[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
Claims
1. A method for optimizing water management in thermal power plants based on dynamic equilibrium of chlorine, characterized in that, include: S1. Construct a chlorine transfer chain model for thermal power plants, quantify the input path of exogenous chlorine-containing materials and the output path of chlorine, establish an input chlorine calculation module covering production water source, domestic water source, coal, air, and desulfurization limestone, and an output chlorine calculation module including ash, gypsum, clean flue gas emissions and sludge cake. S2 deploys water metering instruments and chloride ion analysis instruments to collect water volume and chloride ion concentration data in real time at each chlorine-containing material input node and key node of chlorine transfer path in the thermal power plant, and uploads the collected data to the power plant's SIS system through the built-in data model; S3 calculates the dynamic balance of chlorine input and output throughout the plant based on the law of conservation of mass, combines circulating water clean operation technology to improve the chlorine concentration threshold, and adopts chlorine-oriented enrichment-separation technology coupled with electrodialysis and nanofiltration processes to achieve precise control of chloride ion concentration in desulfurization wastewater. S4. Based on the dynamic balance calculation results and process optimization technology operating parameters, adjust the operation strategies of each water system in the thermal power plant. Through dynamic adjustment of the concentration ratio of the slag-water circulation system and bypass flue gas evaporation and solidification treatment, a water management scheme with closed-loop control of chlorine element is formed.
2. The method as described in claim 1, characterized in that, Constructing a chlorine transfer chain model for thermal power plants, including: S11, When quantifying the input path of external chlorine-containing materials, calculate the water intake from the production water source separately. With chlorine concentration Domestic water intake With chlorine concentration Coal consumption With chlorine mass fraction air volume With chlorine concentration Desulfurization limestone dosage With chlorine mass fraction The amount of chlorine input; S12, when quantifying the output path of chlorine, calculate the dry ash production separately. With chlorine mass fraction Dry residue production With chlorine mass fraction gypsum production With chlorine concentration Net flue gas volume With chlorine concentration Water content of mud cake With chlorine concentration The output chlorine content.
3. The method as described in claim 1, characterized in that, Deploy water metering instruments and chloride ion analysis instruments, including: S21 deploys chloride ion analyzers with an accuracy of 0.1 g / m³ in industrial water systems to collect real-time chlorine concentration data of circulating water. data; S22, a nanofiltration membrane flux monitoring module is deployed in the desulfurization wastewater treatment system to monitor the flux of the membrane. and The correlation model was used to calculate the chlorine enrichment efficiency.
4. The method as described in claim 1, characterized in that, The dynamic balance of chlorine input and output in the entire plant was calculated based on the law of conservation of mass, including: S31, using the formula to calculate the dynamic balance of input and output chlorine levels: k3 ； The input items contain 31 chlorine-related parameters, and the output items contain 18 chlorine-related parameters.
5. The method as described in claim 1, characterized in that, Adjust the operating strategies of various water systems in thermal power plants, including: S41, based on the concentration ratio of the sludge-water circulation system The real-time monitoring value is used to dynamically adjust the water replenishment strategy within the range of 1.7-2.
2. When the value exceeds 2.2, the bypass flue gas evaporation system is activated to perform chlorine-containing solution solidification treatment.
6. The method as described in claim 1, characterized in that, Also includes: S5, through the coupled treatment of electrodialysis and nanofiltration processes, reduces the chloride ion concentration in desulfurization wastewater. The concentration of chlorine in the solution is controlled within the threshold range of 15,000 g / m³, and the separated high-concentration chlorine solution is transported to the bypass flue gas evaporation system for solidification treatment, thereby reducing the amount of desulfurization wastewater treated by 50%.
7. A water management optimization device for thermal power plants based on dynamic chlorine balance, characterized in that, include: The chlorine element transfer chain modeling module is used to construct a chlorine element transfer chain model for thermal power plants, quantify the input path of exogenous chlorine-containing materials and the output path of chlorine, establish an input chlorine calculation module covering production water source, domestic water source, coal, air, and desulfurization limestone, and an output chlorine calculation module including ash, gypsum, clean flue gas emissions and sludge cake. The instrument deployment and data acquisition module is used to deploy water metering instruments and chloride ion analysis instruments. It collects water volume and chloride ion concentration data in real time at each chlorine-containing material input node and key node of chlorine transfer path in the thermal power plant, and uploads the collected data to the power plant SIS system through the built-in data model. The dynamic balance and process optimization module is used to calculate the dynamic balance of chlorine input and output throughout the plant based on the law of conservation of mass. It combines circulating water clean operation technology to improve the chlorine concentration threshold and adopts chlorine-oriented enrichment-separation technology coupled with electrodialysis and nanofiltration processes to achieve precise control of chloride ion concentration in desulfurization wastewater. The operation strategy adjustment module is used to adjust the operation strategies of various water systems in thermal power plants based on dynamic balance calculation results and process optimization technology operation parameters. Through dynamic adjustment of the concentration ratio of the slag-water circulation system and bypass flue gas evaporation and solidification treatment, a water management scheme with closed-loop control of chlorine element is formed.
8. The apparatus as claimed in claim 7, characterized in that, Also includes: The electrodialysis and nanofiltration coupled treatment module is used to reduce the chloride ion concentration in desulfurization wastewater. The concentration of chlorine in the solution is controlled within the threshold range of 15,000 g / m³, and the separated high-concentration chlorine solution is transported to the bypass flue gas evaporation system for solidification treatment, thereby reducing the amount of desulfurization wastewater treated by 50%.
9. An electronic device, comprising: processor; Memory, which stores executable instructions; When the processor executes instructions, it implements a water management optimization method for thermal power plants based on dynamic balance of chlorine as described in any one of claims 1-6.
10. A computer-readable storage medium storing a computer program, which, when executed by a processor, implements a method for optimizing water management in thermal power plants based on dynamic chlorine balance as claimed in any one of claims 1-6.