A method and device for optimizing switching time of a high-temperature gas-cooled reactor primary circuit dehumidification column

Abstract

The application discloses a high-temperature gas cooled reactor primary loop dehumidification column switching time optimization method and device, and belongs to the technical field of high-temperature gas cooled reactor (HTR-PM) debugging optimization. By acquiring the operation parameters of the accident dehumidification column and the normal purification column and the hot-state water concentration target of the primary loop, the dehumidification process analysis basis is established; based on the rate characteristics of the two types of dehumidification columns under different humidities, the corresponding primary loop water concentration when the dehumidification rates are equal is calculated, and the primary loop water concentration is determined as the optimal switching humidity; under the hot-state working condition, the accident dehumidification column is started to dehumidify, and the primary loop water concentration is monitored in real time; when the water concentration decreases to the optimal switching humidity, the switching operation from the accident dehumidification column to the normal purification column is performed; then, continuous dehumidification is performed until the water concentration reaches the final target value. The accurate judgment and dynamic optimization of the switching time are realized, and the overall efficiency of the dehumidification process and the system operation stability are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of high-temperature gas-cooled reactor (HTR-PM) commissioning and optimization technology, and in particular to a method, apparatus, equipment and storage medium for optimizing the switching timing of the primary loop dehumidifier train in a high-temperature gas-cooled reactor. Background Technology

[0002] This research relates to the field of nuclear power plant commissioning and operation optimization technology, specifically an optimization method for the primary loop heating and dehumidification process in a high-temperature gas-cooled reactor demonstration power plant (HTR-PM). Thorough heating and dehumidification is a crucial prerequisite during the commissioning phase before the primary loop is put into operation. Its purpose is to eliminate residual moisture within the system, preventing condensation and corrosion of critical equipment during subsequent temperature and pressure increases, and ensuring reactor safety and operational efficiency. The duration of this dehumidification process directly impacts the critical path of the entire nuclear power plant commissioning project, significantly affecting the shortening of the power plant construction cycle and the reduction of commissioning costs.

[0003] Currently, the typical heating and dehumidification process of the HTR-PM primary loop usually follows a sequential operation mode: first, the emergency cooling dehumidification column of the helium purification system (referred to as the emergency dehumidification column) is activated, using its processing capacity to reduce the water vapor concentration in the primary loop gas phase to a predetermined intermediate acceptance standard (e.g., 571 ppm); after reaching this standard, it switches to the normal purification column of the helium purification system (referred to as the normal purification column) for subsequent deep dehumidification until an even lower final target concentration is achieved. However, this traditional method has significant technical limitations, mainly in the following two aspects: First, the dehumidification strategy described is relatively crude and fails to precisely match the dynamic performance characteristics of different dehumidification units. Due to differences in internal adsorbent types, bed structures, and regeneration methods, emergency dehumidification units and normal purification units exhibit different dehumidification rates within different humidity ranges in the first loop. Emergency dehumidification units often have higher dehumidification efficiency in higher humidity ranges, while the molecular sieve beds designed for normal purification units possess superior adsorption performance and continuous operating capability in lower humidity ranges. Traditional methods switch at a fixed concentration point, failing to fully consider the characteristic curves of dehumidification rates changing with concentration for both. When the humidity in the first loop has dropped to a low level, if the emergency dehumidification unit continues to be used, its dehumidification rate may have significantly decreased, falling below the potential rate of the normal purification unit at that humidity. This leads to inefficiency in the latter half of the dehumidification process, unnecessarily prolonging the overall dehumidification period.

[0004] Secondly, the judgment of the switching timing lacks objective and quantitative scientific basis, relying excessively on the experience of on-site operators. This experience-based judgment has significant uncertainty and randomness, easily leading to two suboptimal switching operations: First, switching too early, i.e., activating the normal purification train while the loop humidity is still relatively high. At this time, the molecular sieve bed will face a high water vapor load, and the adsorbent will quickly approach saturation, not only shortening the effective dehumidification time but also potentially requiring frequent start-stop cycles for bed regeneration, greatly increasing operational complexity, helium consumption, and energy consumption. Second, switching too late, i.e., failing to switch off the emergency dehumidification train at the critical point when its efficiency begins to decline significantly. This means failing to fully utilize the time window saved by its high-efficiency dehumidification capacity in the higher humidity range, while simultaneously causing it to operate in the inefficient range for too long, also resulting in a waste of overall project time. Both situations are detrimental to the optimization and control of the commissioning progress.

[0005] Therefore, existing technologies lack a method to accurately determine the optimal switching timing based on the dynamic performance characteristics of dehumidifiers, thereby comprehensively optimizing the entire dehumidification process. There is an urgent need to propose a scientific and quantitative optimization method to overcome these shortcomings and achieve the minimization of dehumidification time and efficient utilization of commissioning resources. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] To address this, this invention proposes an optimization method for the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor. First, key system data, including operating parameters of the emergency dehumidification train and the normal purification train, the total loop volume, and the target water concentration, are acquired. Based on the rate characteristics of the two types of dehumidification trains under different humidity levels, the primary loop water concentration corresponding to the equal dehumidification rates is calculated and determined as the optimal switching humidity. During implementation, the primary loop is first heated to a hot operating condition to allow sufficient moisture to evaporate. Then, the emergency dehumidification train is activated for dehumidification, while the primary loop water concentration is monitored in real time. When the water concentration drops to the optimal switching humidity, the emergency dehumidification train is shut down, and the process is switched to the normal purification train to continue dehumidification. Finally, monitoring continues until the primary loop water concentration reaches the final target value, completing all dehumidification operations. This invention achieves quantification and optimization of the switching timing, effectively improving dehumidification efficiency and process economy.

[0008] Another objective of this invention is to provide an optimization device for the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor.

[0009] The third objective of this invention is to provide a computer device.

[0010] A fourth objective of this invention is to provide a non-transitory computer-readable storage medium.

[0011] To achieve the above objectives, this invention proposes a method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, comprising: S1, obtain the flow rate and outlet water concentration of the helium purification emergency cooling and dehumidification column, as well as the flow rate of the normal purification column, and at the same time determine the total volume of the primary loop medium, the initial hot water concentration, and the final target water concentration. S2, based on the dehumidification rate characteristics of the emergency dehumidification column and the normal purification column under different humidity, calculate the primary loop water concentration when the dehumidification rates of the two are equal as the optimal switching humidity; S3: After heating the primary circuit to hot operating conditions and confirming that all moisture in the reactor components has evaporated, start the emergency dehumidification train to perform dehumidification operation, while monitoring the changes in primary circuit water concentration in real time. S4, when the concentration of the primary circuit water drops to the optimal switching humidity, shut down the emergency dehumidification column and switch to the normal purification column to continue dehumidification; S5 continuously monitors the primary loop water concentration until the final target water concentration is reached, thus completing the dehumidification process.

[0012] The method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor according to an embodiment of the present invention may also have the following additional technical features: In one embodiment of the present invention, the step of calculating the primary loop water concentration as the optimal switching humidity when the dehumidification rates of the emergency dehumidification column and the normal purification column are equal under different humidity conditions includes: S21, according to formula and Calculate the dehumidification rates of the emergency dehumidification train and the normal purification train separately; S22, through joint The equation is solved to obtain the optimal switching humidity. The specific value.

[0013] In one embodiment of the present invention, after heating the primary circuit to a hot operating condition and confirming that all moisture in the reactor components has evaporated, the emergency dehumidification train is activated to perform dehumidification operations, while simultaneously monitoring changes in the primary circuit water concentration in real time, including: S31, heat the primary circuit to Thermal operating conditions; S32 confirmed that the moisture in the reactor internals had completely evaporated using an infrared moisture detector and a dew point analyzer.

[0014] In one embodiment of the present invention, the step of shutting down the emergency dehumidification column and switching to the normal purification column to continue dehumidification when the primary loop water concentration is detected to drop to the optimal switching humidity includes: S41, shut down the main helium fan and dryer of the helium purification emergency cooling and dehumidification train; S42, start the molecular sieve bed adsorption device of the normal purification column of the helium purification system, and adjust the system pressure to the design conditions.

[0015] In one embodiment of the present invention, the step of continuously monitoring the primary loop water concentration until the final target water concentration is reached to complete the dehumidification process includes: The S51 uses an online electrolysis humidity monitoring device, which collects water concentration data every 15 minutes. S52, when the water concentration is measured three times consecutively below the final target water concentration When the time is right, the dehumidification process is considered complete.

[0016] In one embodiment of the present invention, it further includes: S6, record the total time of the optimized dehumidification process. Compared with the number of molecular sieve bed regenerations and the dehumidification time of traditional methods. and number of regenerations A comparative analysis was conducted to verify the optimization effect.

[0017] To achieve the above objectives, another aspect of the present invention proposes a device for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, comprising: The parameter acquisition module is used to acquire the flow rate and outlet water concentration of the helium purification emergency cooling and dehumidification column, as well as the flow rate of the normal purification column, and to determine the total volume of the primary loop medium, the initial hot water concentration, and the final target water concentration. The humidity calculation module is used to calculate the primary loop water concentration when the dehumidification rates of the emergency dehumidification column and the normal purification column are equal under different humidity conditions, and to use this as the optimal switching humidity. The operating condition start-up module is used to heat the primary loop to the hot operating condition and, after confirming that the moisture in the reactor components has completely evaporated, to start the emergency dehumidification train for dehumidification operation, while monitoring the changes in the primary loop water concentration in real time. The column switching module is used to shut down the emergency dehumidification column and switch to the normal purification column to continue dehumidification when the concentration of the primary loop water drops to the optimal switching humidity. The process monitoring module is used to continuously monitor the primary loop water concentration until the final target water concentration is reached, thus completing the dehumidification process.

[0018] In one embodiment of the present invention, it further includes: The recording module is used to record the total time of the optimized dehumidification process. Compared with the number of molecular sieve bed regenerations and the dehumidification time of traditional methods. and number of regenerations A comparative analysis was conducted to verify the optimization effect.

[0019] This invention discloses a method and apparatus for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor. The system acquires key operating parameters of the dehumidification train and the state of the primary loop medium. Based on the dehumidification rate characteristics of the emergency dehumidification train and the normal purification train under different humidity levels, a mathematical model is established to accurately calculate the optimal switching humidity when their dehumidification rates are equal. This solves the problems of traditional dehumidification processes, such as reliance on experience-based judgment for switching timing, low dehumidification efficiency, and high operating costs. By heating the primary loop to a hot operating condition and confirming complete evaporation of moisture, the emergency dehumidification train is activated. The water concentration change is monitored in real time. When the optimal switching humidity is reached, the system automatically switches to the normal purification train to continue dehumidification, and monitoring continues until the final target concentration is reached. This invention achieves scientific quantification and dynamic optimization control of the dehumidification process, significantly shortening the overall dehumidification period, effectively reducing the regeneration frequency of the molecular sieve bed and system operating energy consumption, improving dehumidification efficiency and economy, and enhancing the reliability, controllability, and engineering applicability of the commissioning process.

[0020] To achieve the above objectives, a third aspect of this application provides a computer device, including 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 method for optimizing the switching timing of the primary loop dehumidification train of a high-temperature gas-cooled reactor as described in the first aspect embodiment.

[0021] 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 method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor as described in the first aspect embodiment.

[0022] 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

[0023] 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 method for optimizing the switching timing of the primary loop dehumidifier train in a high-temperature gas-cooled reactor according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the HTR-PM primary loop heating process, which illustrates the specific steps of a method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor according to an embodiment of the present invention. Figure 3 This is a simplified flowchart of the HTR-PM primary loop heating and dehumidification optimization process for an application scenario of a high-temperature gas-cooled reactor primary loop dehumidification train switching timing optimization method according to an embodiment of the present invention. Figure 4 This is a schematic diagram of a high-temperature gas-cooled reactor primary loop dehumidification train switching timing optimization device according to an embodiment of the present invention; Figure 5 It is a computer device according to an embodiment of the present invention. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] The following description, with reference to the accompanying drawings, describes a method, apparatus, equipment, and storage medium for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor according to an embodiment of the present invention.

[0027] The core idea of ​​this invention is to construct a quantitative optimization model covering key parameters and dynamic performance of the dehumidification system. First, the system collects core parameters including the operating flow rate, outlet concentration, total primary loop volume, and initial and target water concentrations of both the emergency dehumidification and normal purification units, forming the data foundation for optimization analysis. Then, based on the dynamic rate characteristics of the two types of dehumidification units under different humidity conditions, a mathematical model of the dehumidification rate changing with concentration is established. By solving the rate equality equation, the theoretically optimal switching humidity is accurately calculated as the key decision threshold. During implementation, after heating the primary loop to a predetermined hot state and confirming complete condensation of internal moisture, the emergency dehumidification unit is prioritized for efficient dehumidification, while the dynamic decay of the primary loop water concentration is continuously tracked through a real-time monitoring network. When the monitored concentration drops to the aforementioned calculated optimal switching threshold, an automatic switching operation from the emergency dehumidification unit to the normal purification unit is executed. Subsequently, the normal purification unit takes over and completes deep dehumidification until the concentration consistently meets the final target requirements. The traditional experience-based switching operation has been transformed into a process optimization control strategy driven by quantitative thresholds based on dynamic performance matching. This achieves scientific allocation of dehumidification resources and minimizes the entire process duration, significantly improving dehumidification efficiency, operational economy, and operational reliability.

[0028] Example 1 To achieve the above invention, embodiments of the present invention provide a method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, such as... Figure 1 As shown, it includes: S1: Obtain the flow rate and outlet water concentration of the helium purification emergency cooling and dehumidification train, as well as the flow rate of the normal purification train, and simultaneously determine the total volume of the primary loop medium, the initial hot water concentration, and the final target water concentration.

[0029] Specifically, this step systematically acquires key operating parameters, providing precise input conditions for subsequent calculations of optimal switching humidity and optimization of the dehumidification process.

[0030] Furthermore, the flow rate of the helium purification accident cooling dehumidification train. Flow rate compared to normal purification column Typically obtained through online monitoring with a flow meter or system design parameters, the unit is [unit missing]. The concentration of the dehumidifier outlet water in the accident. Moisture content is measured in real-time by a moisture analyzer at the dehumidification system outlet, in ppm. Total volume of the primary loop medium. Determined based on system design drawings or on-site measurements, unit: Initial water concentration in hot state With the final target water concentration Then, the concentration monitoring device in the primary loop water is used to monitor the water concentration during heating. Subsequent data were collected, also in ppm.

[0031] Furthermore, the parameters involved in this step must meet certain accuracy requirements. For example, the flow measurement error should be controlled within a certain range. Within this range, the water concentration measurement error should be less than [amount missing]. This is to ensure the reliability of subsequent calculations. At the same time, parameter acquisition must be performed when the system is in a stable operating state to avoid data distortion caused by transient fluctuations.

[0032] Specifically, this step is typically implemented during the HTR-PM commissioning phase, and is particularly suitable for dehumidification operations of the primary loop system under hot conditions. Accurately obtaining the above parameters can inform subsequent steps based on formulas. and The calculation of the dehumidification rate provides the basic support, thereby realizing the optimal switching strategy between the fault train and the normal train.

[0033] Specifically, the technical benefit of this step lies in providing quantifiable and calculable input conditions for the entire optimization method, ensuring the scientific validity and rationality of subsequent switching timing. By accurately acquiring and verifying these parameters, the prediction accuracy and control effect of the dehumidification process can be significantly improved, laying a solid foundation for shortening the dehumidification period and reducing operating costs.

[0034] S2, based on the dehumidification rate characteristics of the emergency dehumidification train and the normal purification train under different humidity conditions, calculate the primary loop water concentration when the dehumidification rates of the two are equal as the optimal switching humidity.

[0035] Specifically, this method combines mathematical modeling with actual operating parameters to achieve scientific decision-making on the timing of dehumidification train switching, thereby optimizing the entire primary circuit heating and dehumidification process.

[0036] Specifically, dehumidification rate models for the emergency dehumidification train and the normal purification train need to be established separately. According to the formula provided in the technical disclosure, the expression for the change in water concentration over time in the emergency dehumidification train is: ; in, This represents the water concentration of the primary loop medium at time t. For the dehumidifier flow rate in case of an accident, For emergency dehumidification, dehumidification constant is listed. The concentration of the outlet water for the dehumidifier in the accident. This represents the total volume of the medium in the primary loop. Its corresponding dehumidification rate is: .

[0037] The expression for the water concentration in a normal purification column is: ; in, For normal purification column flow, This is its corresponding dehumidification constant. Its dehumidification rate is: .

[0038] Furthermore, optimal humidity switching The determination is based on The condition is that, at a certain water concentration, the dehumidification rates of the emergency dehumidification train and the normal purification train are equal. By simultaneously solving the above two sets of formulas and substituting the actual operating parameters (such as...), , , , , , ), can be solved This value serves as the switching point, ensuring that the system remains in the high-efficiency dehumidification zone during switching, thus avoiding resource waste or efficiency reduction due to switching too early or too late.

[0039] Specifically, this step applies to the primary circuit of a high-temperature gas-cooled reactor (HTR-PM) in a hot state (approximately... The dehumidification process underwent adjustment. This was achieved by real-time monitoring of the primary loop water concentration, until it reached... When the system automatically or manually switches to the normal purification column, it achieves dynamic optimization of the dehumidification process.

[0040] Specifically, this step demonstrates significant technical effectiveness. By combining theoretical modeling with actual parameters, it achieves precise control over the timing of dehumidification cycle switching. Compared to traditional experience-based operations, this method can shorten dehumidification time by approximately 7.9 hours and reduce the number of molecular sieve bed regeneration cycles, thereby lowering commissioning costs and operational complexity. It possesses excellent engineering practical value and promising prospects for widespread application.

[0041] Furthermore, S2 includes: S21, according to formula and Calculate the dehumidification rates of the emergency dehumidification train and the normal purification train separately.

[0042] Specifically, this step is based on a dynamic model of the water concentration in the primary loop medium changing over time. Combining the flow characteristics of the emergency dehumidification train and the normal purification train, the dehumidification rate under different humidity conditions is calculated, thus providing a theoretical basis for determining the optimal switching humidity.

[0043] Furthermore, the dehumidification rate of the emergency dehumidification unit... From the formula Definition, where Indicates the helium flow rate of the emergency dehumidifier (unit: ), Let t be the water concentration in the primary loop medium at time t (in ppm). The water concentration at the outlet of the emergency dehumidification unit (in ppm) represents the water removal rate achieved by the emergency dehumidification unit at a given moment, calculated as the product of the helium flow rate per unit time and the difference between the medium and the outlet water concentration. Similarly, the dehumidification rate of a normal purification unit... From the formula It means that, among them The helium flow rate for a normal purification column, Let be the concentration of the primary loop medium water at time t. This represents the concentration of water at the outlet of the normal purification column. This formula reflects the continuous water removal capability of the normal purification column in the low humidity range.

[0044] Furthermore, and The value needs to be determined based on system design parameters or on-site measured data, and is usually within... Magnitude; and The outlet water concentration represents the dehumidification capacity boundary between the faulty and normal trains, typically within... Magnitude; and The water concentration of the primary loop medium varies at different dehumidification stages, and its changes are described by the system dynamic model. Accurate acquisition of these parameters is a prerequisite for ensuring the accuracy of dehumidification rate calculations.

[0045] Specifically, this step applies to the heating and dehumidification process of the primary loop in a high-temperature gas-cooled reactor (HTR-PM) under hot operating conditions. In actual commissioning, when the primary loop is heated to... After all the moisture in the reactor internals has evaporated, the system enters the dehumidification phase. By monitoring the primary loop water concentration in real time and calculating the dehumidification rate using the formula mentioned above, a quantitative basis can be provided for determining the timing of subsequent switching.

[0046] Specifically, by accurately modeling the dehumidification rates of the emergency dehumidification column and the normal purification column, the performance differences between the two in different humidity ranges can be revealed. In the high humidity range, the emergency dehumidification column has a higher dehumidification rate, while in the low humidity range, the normal purification column exhibits superior deep dehumidification capability. This calculation provides crucial input for determining the optimal switching humidity, thereby achieving efficient connection of the dehumidification process, shortening the total dehumidification time, reducing the regeneration frequency of the molecular sieve bed, and improving the economy and stability of system operation.

[0047] S22, through joint The equation is solved to obtain the optimal switching humidity. The specific value.

[0048] Specifically, this step, based on the difference in dehumidification rates between the emergency dehumidification train and the normal purification train in different humidity ranges, uses mathematical modeling and simultaneous equation solving to determine the water concentration value when the dehumidification rates of the two trains are equal, thus providing a scientific basis for switching the dehumidification trains.

[0049] Specifically, the dehumidification rate expressions for the emergency dehumidification train and the normal purification train need to be clarified first. According to the formula in the technical disclosure document, the dehumidification rate of the emergency dehumidification train... It can be represented as ,in The water concentration of the primary loop medium during emergency dehumidification train operation. The concentration of the outlet water for the dehumidifier in the accident. This refers to the helium flow rate of the emergency dehumidification unit. The dehumidification rate of the normal purification unit is... for ,in The water concentration during normal operation of the purification column. The concentration of the purified water at the outlet is normal. Its helium flow rate. Through a combination of... The optimal switching humidity can be solved. ,Right now .

[0050] Furthermore, the key parameters involved in this step include: emergency dehumidification train flow rate. Normal purification column flow rate , Concentration of water at the outlet of the dehumidifier in case of an accident Normal purification process outlet water concentration In practical applications, these parameters need to be obtained through on-site measurements or design data, and their accuracy must be ensured to meet engineering requirements; typically, the error range should be controlled within ±5%. For example, in the HTR-PM B-stage implementation case, , , , Substituting into the formula, we can obtain .

[0051] Specifically, this step applies to the heating and dehumidification process of the primary loop in a high-temperature gas-cooled reactor under hot operating conditions. In actual operation, when the water concentration in the primary loop drops to... In such cases, the system should immediately switch from the emergency dehumidification train to the normal purification train to ensure maximum dehumidification efficiency. Determining this switching point avoids continuing to use the emergency train with a low dehumidification rate in low humidity ranges, while also preventing the normal train's molecular sieve bed from becoming rapidly saturated due to premature activation.

[0052] Specifically, this step achieves dynamic optimization of the dehumidification process by precisely calculating the switching point, significantly improving dehumidification efficiency. In the implementation case, the optimized total dehumidification time was shortened by 7.9 hours compared to the traditional method, and the number of molecular sieve bed regenerations was reduced from 3 to 1, effectively reducing commissioning costs and operational complexity. This method has good engineering applicability and promotional value, and can be widely applied to the primary loop dehumidification optimization of HTR-PM and other high-temperature gas-cooled reactors.

[0053] S3: After heating the primary circuit to hot operating conditions and confirming that all moisture in the reactor components has evaporated, the emergency dehumidification train is started to perform dehumidification operation, while the change in primary circuit water concentration is monitored in real time.

[0054] Specifically, the technical principle of this step is based on the basic laws of thermodynamics and gas dynamics. By controlling the temperature and pressure of the primary loop medium, the moisture in the reactor internals is fully volatilized and enters the helium medium, thereby providing stable initial conditions for subsequent dehumidification operations.

[0055] Specifically, the primary loop system must first be heated to a hot operating condition, typically... This temperature represents a typical threshold for the complete evaporation of moisture in the HTR-PM reactor internals. The heating process requires coordinated control of the main helium blower and heaters to ensure a uniform temperature rise and prevent localized overheating or thermal stress concentration. Simultaneously, a water concentration monitoring device must be used to monitor changes in the water concentration in the primary loop medium in real time to confirm that all moisture in the reactor internals has evaporated. Initial water concentration. Usually This value is derived from system design or field measurement data.

[0056] Furthermore, the total volume of the primary circuit medium for Helium purification accident cooling dehumidification train flow rate Outlet water concentration In this stage, the dehumidification rate is determined by the formula... Description, in which This represents the concentration of the medium water in the primary loop at time t. This formula is used to calculate the optimal switching humidity in subsequent calculations.

[0057] Furthermore, this step is typically implemented during the commissioning phase of a nuclear power plant and is applicable to the primary loop system of HTR-PM and similar high-temperature gas-cooled reactors. By heating the system to a hot state and ensuring complete evaporation of moisture, problems such as decreased dehumidification efficiency or equipment corrosion caused by residual moisture can be effectively avoided.

[0058] Specifically, the technical effect of this step is to provide an accurate initial state for subsequent dehumidification column switching, ensure that the dehumidification process starts under optimal operating conditions, thereby improving overall dehumidification efficiency, shortening the construction period, and laying the foundation for subsequent switching strategies based on dehumidification rate matching.

[0059] Furthermore, S3 includes: S31, heat the primary circuit to The hot working conditions.

[0060] Specifically, this step is usually performed during the commissioning phase, where the main helium blower and heating system work together to raise the temperature of the primary loop helium medium to [temperature value missing]. This ensures that the adsorbed and free water in the stack structure fully evaporates and enters the gas phase, thereby improving the processing efficiency of the subsequent dehumidification system.

[0061] Furthermore, this step must be implemented after the initial filling and sealing of the reactor internals are complete. The heating system controls the heating power and helium circulation rate to ensure that the temperature of the primary loop medium rises uniformly within a set time. Temperature control typically employs a PID control strategy to ensure that temperature fluctuations are kept within a certain range. To prevent localized overheating and subsequent degradation of material properties, a temperature monitoring device, such as a thermocouple or infrared thermometer, is required to collect real-time temperature data within the reactor core and link it to the control system for closed-loop control.

[0062] Furthermore, the total volume of the primary circuit medium Usually initial water concentration Reachable The target heating temperature is At this temperature, the saturated vapor pressure of moisture increases significantly, thereby accelerating the release of moisture from the surface of the reactor components and the pores of the material. Based on empirical data, when the temperature reaches… At this time, the evaporation efficiency of moisture in the reactor internals can be increased by more than 30%, providing a cleaner initial gas environment for subsequent dehumidification systems (such as emergency dehumidification trains and normal purification trains).

[0063] Specifically, this step is typically performed during the initial commissioning phase of a nuclear power plant as a prerequisite for the dehumidification process. Its operating environment must meet certain safety standards, such as helium purity of not less than 99.999% and system pressure controlled at [specific levels]. Within a certain range, to ensure the stability and safety of the heating process. In addition, it is necessary to ensure that the water concentration monitoring device is in normal working order so as to accurately capture water concentration changes in subsequent steps.

[0064] Specifically, by heating the primary circuit medium to... This significantly increases the evaporation rate of moisture, shortens the total time of the dehumidification process, and provides a scientific basis for subsequent dehumidification series switching. In this invention, this step is crucial for the optimal switching humidity. The calculations laid the foundation for ensuring that the concentration of water in the primary loop is within a reasonable range during switching, thereby achieving a dual optimization of dehumidification efficiency and cost.

[0065] S32 confirmed that the moisture in the reactor internals had completely evaporated using an infrared moisture detector and a dew point analyzer.

[0066] Specifically, the technical implementation of this step is based on a deep understanding of the moisture volatilization characteristics of reactor internals under hot operating conditions, as well as the ability to monitor the water concentration in the primary loop medium in real time.

[0067] Specifically, this step involves non-contact or contact measurement of the moisture content on the surface of the reactor components and in the primary loop medium using an infrared moisture detector or a dew point analyzer. The infrared moisture detector utilizes the absorption characteristics of moisture at specific wavelengths, emitting infrared light and receiving reflected or transmitted signals to calculate the moisture content. The dew point analyzer, on the other hand, calculates the water vapor concentration by measuring the condensation temperature (dew point temperature) of moisture in the gas. Both devices can achieve high-precision, real-time moisture detection, typically with an accuracy below 1 ppm, meeting the stringent humidity control requirements of the HTR-PM primary loop dehumidification process.

[0068] Furthermore, this step requires heating the primary circuit to a hot state. This is followed by execution to ensure that adsorbed or bound water in the reactor internals fully volatilizes at high temperatures and enters the primary circuit medium. At this time, the initial water concentration in the primary circuit is... Typically above 30,000 ppm, moisture needs to be fully released through heating and circulation. Optionally, this process can be accelerated by driving helium circulation with the main helium blower to increase the diffusion of moisture from the reactor internals to the primary circuit medium.

[0069] Furthermore, the completion of this step is indicated by the infrared moisture detector or dew point analyzer showing that the moisture content on the surface of the in-core components and in the primary loop medium has dropped to a negligible level, indicating that the moisture has completely evaporated. This judgment provides a scientific basis for the subsequent deployment of dehumidification units, ensuring that the dehumidification process is started under optimal operating conditions, thereby improving overall dehumidification efficiency and reducing unnecessary operations and resource waste.

[0070] Specifically, this step ensures that the primary loop system is in its optimal initial state before entering the formal dehumidification stage by using precise moisture detection methods and reasonable thermal condition settings. This lays the foundation for subsequent optimized switching strategies based on dehumidification rate matching, and has significant engineering practical value and operational reliability.

[0071] S4, when the concentration of the primary circuit water drops to the optimal switching humidity, shut down the emergency dehumidification column and switch to the normal purification column to continue dehumidification.

[0072] Specifically, this step determines the switching point through scientific calculation based on the difference in dehumidification rates between the emergency dehumidification column and the normal purification column in different humidity ranges, thereby achieving dual optimization of dehumidification efficiency and operating costs.

[0073] Specifically, this step relies on accurate feedback from a real-time water concentration monitoring system. In the HTR-PM primary loop system, the water concentration monitoring device typically employs an online humidity analyzer with a measurement accuracy of ±1 ppm and a response time of less than 10 seconds, meeting the dynamic tracking requirements for humidity changes during dehumidification. When the system detects the current water concentration... Approximately through the formula The calculated accident dehumidification water concentration change curve was further compared with the formula. Compare the described dehumidification rate to determine if it matches the dehumidification rate of a normal purification column. Equal. When and That is the optimal time to switch.

[0074] Furthermore, optimal humidity switching This is obtained by simultaneously solving the dehumidification rate formulas for the emergency dehumidification train and the normal purification train. For example, in the implementation case of Phase B, the outlet water concentration of the emergency dehumidification train... Accident dehumidifier flow rate Normal purification column flow rate Total volume of primary circuit medium initial water concentration The final target water concentration The optimal switching humidity is calculated using the formula above. This value provides a clear quantitative basis for the switching operation.

[0075] Specifically, this step applies to the HTR-PM primary loop in the hot state (approximately The dehumidification process under certain conditions. Once all moisture in the reactor internals has evaporated and the system enters a stable dehumidification phase, the emergency dehumidification train is first activated for rapid dehumidification until the water concentration drops to a certain level. When necessary, switch to the normal purification column for deep dehumidification. This procedure effectively avoids continuing to use the accident column with a low dehumidification rate in low humidity ranges, while also preventing the normal column molecular sieve bed from becoming rapidly saturated due to premature use, thereby reducing the number of regeneration cycles.

[0076] Specifically, this step significantly improves dehumidification efficiency by precisely controlling the switching timing of the dehumidification train. In the Phase B implementation case, the optimized total dehumidification time was shortened to 108.9 hours, a reduction of 7.9 hours compared to the traditional method's 116.8 hours. Simultaneously, the number of molecular sieve bed regeneration cycles in the normal purification train was reduced from three to one, effectively lowering equipment operating costs and operational complexity. This step not only demonstrates the high consistency between theoretical modeling and practical operation of this invention but also showcases its practical value and potential for widespread application in the commissioning process of high-temperature gas-cooled reactors.

[0077] Furthermore, S4 includes: S41, shut down the main helium fan and dryer of the helium purification accident cooling dehumidifier.

[0078] Specifically, the technical implementation of this step is based on real-time monitoring of the primary loop water concentration and theoretical calculation of the optimal switching humidity. This ensures that the system switches at the critical point when the efficiency of the fault dehumidification column begins to decline and the normal purification column has a higher dehumidification capacity, thereby achieving efficient connection of the dehumidification process and optimized resource allocation.

[0079] Furthermore, when the water concentration monitoring device detects that the water concentration in the primary loop medium has dropped to the optimal switching humidity... When this occurs, the control system will trigger the dehumidification train switching logic. At this time, the main helium blower and dryer in the helium purification emergency cooling dehumidification train will be shut down sequentially. The shutdown of the main helium blower must follow the principle of system pressure balance, usually by gradually reducing its speed to avoid sudden changes in system pressure that could impact pipelines and equipment. The shutdown of the dryer must ensure that its internal adsorption material (such as molecular sieves) has fully adsorbed moisture to prevent moisture that has not completed the adsorption process from flowing back into the primary loop system.

[0080] Furthermore, the key parameters involved in this step include: emergency dehumidification train flow rate. , Concentration of water at the outlet of the dehumidifier in case of an accident Total volume of primary circuit medium Initial water concentration Ultimate target water concentration and through formula and The calculated water concentration change curve. When the monitoring value Switching point with theory When they are close, the system will initiate the switching procedure to ensure the accuracy of the switching timing.

[0081] Specifically, this step is mainly applied during the HTR-PM primary loop commissioning phase, especially under hot operating conditions (approximately...). Under these conditions, the moisture in the reactor internals has completely evaporated, and the system enters a high-efficiency dehumidification phase. By shutting down the emergency dehumidification unit at the optimal humidity switching point, the problem of low dehumidification efficiency in the low humidity range can be effectively avoided, while creating favorable conditions for the commissioning of the normal dehumidification unit and improving the overall dehumidification efficiency.

[0082] Specifically, this step enables a smooth transition of the dehumidification system from a high-flow, high-dehumidification-rate faulty system to a low-flow, high-precision dehumidification system in a normal system, significantly shortening the total dehumidification time. In the implementation case, the optimized total dehumidification time was reduced by 7.9 hours compared to the traditional method, while also reducing the number of molecular sieve bed regenerations, lowering commissioning costs and operational complexity, demonstrating the innovation and practicality of this invention in system control and process optimization.

[0083] S42, start the molecular sieve bed adsorption device of the normal purification column of the helium purification system, and adjust the system pressure to the design conditions.

[0084] Specifically, this step aims to smoothly transition the dehumidification task from the emergency dehumidification column to the normal purification column under optimal switching humidity conditions, thereby fully leveraging the performance advantages of the normal purification column in deep dehumidification in the low humidity range and improving overall dehumidification efficiency.

[0085] Specifically, this step first requires ensuring that the molecular sieve bed in the normal purification column of the helium purification system is in an adsorption state after regeneration. The molecular sieve bed typically uses activated alumina or molecular sieve materials (such as 3A, 4A, and 5A type molecular sieves), and its adsorption capacity is closely related to system pressure, temperature, and gas flow rate. During startup, helium flow must be gradually introduced through control valves to slowly raise the system pressure to the operating pressure under design conditions (typically 0.3~0.5 MPa) to avoid damage to the molecular sieve bed structure or a decrease in adsorption efficiency due to sudden pressure changes. Simultaneously, the system must maintain a hot operating condition (approximately 250°C) to ensure that moisture in the internal components has fully evaporated, providing stable initial conditions for subsequent dehumidification.

[0086] Furthermore, the key parameters involved in this step include the normal purification column flow rate. Total volume of primary circuit medium Optimal switching humidity and the final target water concentration For example, in implementation cases, , , , The system pressure needs to be controlled within the design operating range to ensure that the adsorption rate of the molecular sieve bed conforms to the formula. The dehumidification rate characteristics described.

[0087] Specifically, this step applies to the HTR-PM primary loop system's operation scenario where, after completing the initial dehumidification of the emergency dehumidification unit, it enters the deep dehumidification stage. During actual commissioning, when the water concentration monitoring device detects that the primary loop water concentration has dropped to... When necessary, operators must follow the preset procedure to shut down the emergency dehumidifier and turn on the normal purification unit to ensure a smooth and undisturbed system switching process.

[0088] Specifically, this step avoids using the inefficient normal purification column in high humidity ranges by activating it at the optimal switching humidity, while ensuring efficient adsorption of the molecular sieve bed in low humidity ranges, thus reducing the number of regeneration cycles. In the implementation case, this optimization strategy reduced the number of regeneration cycles for the normal column molecular sieve bed from three to one using the traditional method, significantly reducing commissioning costs and operational complexity, and improving the economy and reliability of the system operation.

[0089] S5 continuously monitors the primary loop water concentration until the final target water concentration is reached, thus completing the dehumidification process.

[0090] Specifically, this step is a key step in achieving the required humidity level in the primary loop, and its technical implementation relies on continuous monitoring of water concentration and precise control of system operating parameters.

[0091] Furthermore, the normal purification column employs molecular sieve adsorption technology, whose core function is to remove trace amounts of moisture from helium gas through physical adsorption. The dehumidification rate of this column is calculated using the formula... It means that, among them The helium flow rate for a normal purification column, in units of Because molecular sieves have higher adsorption efficiency in low humidity ranges, the system can control the rate of decrease in water concentration with greater precision after switching to normal purification mode, ensuring that the final concentration is achieved. Acceptance standards.

[0092] Furthermore, the system uses a high-precision water concentration monitoring device (such as an infrared spectrometer or dew point meter) to collect water concentration data in the primary loop medium in real time. The sampling frequency is typically set to once every 10 minutes to ensure data continuity and timely response. When the water concentration drops to the optimal switching humidity... At this time, the emergency dehumidification unit is shut down, and the normal purification unit is put into operation. The system then enters a low humidity range, and the dehumidification rate decreases from [previous rate]. It was determined that the dehumidification process had entered a stable and declining phase.

[0093] Furthermore, the implementation of this step must meet the primary loop thermal conditions ( Conditions must be met to ensure the adsorption performance of the molecular sieve and the stability of the system operation. Simultaneously, the system must possess good sealing and circulation control capabilities to ensure that the helium gas fully contacts the molecular sieve bed in the dehumidification column, thereby improving adsorption efficiency.

[0094] Specifically, by appropriately switching to the normal purification train, the system can achieve more efficient dehumidification in low humidity ranges, avoiding the efficiency decline of the emergency dehumidification train under low humidity conditions. Simultaneously, since the switching timing is based on theoretical calculations, the adsorption capacity of the molecular sieve bed is fully utilized, significantly reducing the number of regeneration cycles, thereby lowering commissioning costs and operational complexity. In practical applications, this step can be widely applied to the primary loop dehumidification optimization of HTR-PM and other high-temperature gas-cooled reactors, demonstrating good engineering practicality and promotional value.

[0095] Furthermore, S5 includes: The S51 uses an online electrolysis humidity monitoring device, which collects water concentration data every 15 minutes.

[0096] Specifically, this step is based on the principle of real-time monitoring and uses electrolysis to quantitatively analyze the moisture content in the helium gas in the primary loop, thereby providing data support for determining the timing of subsequent dehumidification series switching.

[0097] Specifically, online electrolytic humidity monitoring devices typically employ electrolytic humidity sensors. Their working principle involves electrolyzing moisture in helium gas in an electrolytic cell to produce hydrogen and oxygen. The moisture concentration is calculated based on changes in the electrolytic current or gas volume. This device offers advantages such as high accuracy, rapid response, and long-term stability, making it suitable for continuous monitoring in high-temperature, high-pressure, and inert gas environments. The monitoring frequency is set to collect data every 15 minutes to ensure that dynamic changes in water concentration are captured during dehumidification, avoiding missing the optimal switching point due to excessively long sampling intervals.

[0098] Furthermore, the accuracy of water concentration data acquisition should be no less than ±2 ppm, and the response time should be less than 30 seconds to meet the stringent humidity control requirements of the HTR-PM primary loop. The sampling gas flow rate of the monitoring device is typically controlled within the range of 0.1~0.5 L / min to ensure measurement stability and representativeness. In addition, the monitoring device should have data storage and remote transmission capabilities, supporting integration with control systems or data analysis platforms for real-time monitoring and subsequent processing.

[0099] Specifically, this step is typically implemented at the outlet or a critical node of the primary loop helium circulation system, and monitoring is initiated after heating to a hot state (250°C). By continuously collecting water concentration data, the system can determine the current operating efficiency of the dehumidifier and combine this with a preset dehumidification rate model (such as the formula). and Dynamic analysis is performed to determine the optimal humidity switching method. This provides a basis for the determination.

[0100] Specifically, by acquiring high-frequency, high-precision water concentration data, the dehumidification process is precisely controlled, improving dehumidification efficiency and reducing operational risks caused by human error. Simultaneously, it provides a reliable data foundation for subsequent switching strategies based on the principle of equal dehumidification rates, which is a crucial prerequisite for achieving the optimization objectives of this invention.

[0101] S52, when the water concentration is measured three times consecutively below the final target water concentration When the time is right, the dehumidification process is considered complete.

[0102] Specifically, this step is based on the principle of real-time monitoring and uses electrolysis to quantitatively analyze the moisture content in the helium gas in the primary loop, thereby providing data support for determining the timing of subsequent dehumidification series switching.

[0103] Specifically, online electrolytic humidity monitoring devices typically employ electrolytic humidity sensors. Their working principle involves electrolyzing moisture in helium gas in an electrolytic cell to produce hydrogen and oxygen. The moisture concentration is calculated based on changes in the electrolytic current or gas volume. This device offers advantages such as high accuracy, rapid response, and long-term stability, making it suitable for continuous monitoring in high-temperature, high-pressure, and inert gas environments. The monitoring frequency is set to collect data every 15 minutes to ensure that dynamic changes in water concentration are captured during dehumidification, avoiding missing the optimal switching point due to excessively long sampling intervals.

[0104] Furthermore, the accuracy of water concentration data acquisition should be no less than ±2 ppm, and the response time should be less than 30 seconds to meet the stringent humidity control requirements of the HTR-PM primary loop. The sampling gas flow rate of the monitoring device is typically controlled within the range of 0.1~0.5 L / min to ensure measurement stability and representativeness. In addition, the monitoring device should have data storage and remote transmission capabilities, supporting integration with control systems or data analysis platforms for real-time monitoring and subsequent processing.

[0105] Specifically, this step is typically implemented at the outlet or a critical node of the primary loop helium circulation system, and monitoring is initiated after heating to a hot state (250°C). By continuously collecting water concentration data, the system can determine the current operating efficiency of the dehumidifier and combine this with a preset dehumidification rate model (such as the formula). and Dynamic analysis is performed to determine the optimal humidity switching method. This provides a basis for the determination.

[0106] Specifically, by acquiring high-frequency, high-precision water concentration data, the dehumidification process is precisely controlled, improving dehumidification efficiency and reducing operational risks caused by human error. Simultaneously, it provides a reliable data foundation for subsequent switching strategies based on the principle of equal dehumidification rates, which is a crucial prerequisite for achieving the optimization objectives of this invention.

[0107] S6, record the total time of the optimized dehumidification process. Compared with the number of molecular sieve bed regenerations and the dehumidification time of traditional methods. and number of regenerations A comparative analysis was conducted to verify the optimization effect.

[0108] Specifically, this step is based on dynamic modeling of the dehumidification process and optimization of switching strategies, and uses quantitative analysis to evaluate the actual effect of system performance improvement.

[0109] Specifically, this step first involves real-time monitoring of changes in water concentration in the primary loop medium, recording the temperature drop from the initial water concentration to the optimal switching humidity. Required emergency dehumidifier run time and from Reduced to the final target water concentration Required normal clean column run time Total time The calculation is based on a two-stage dehumidification rate model, where the dehumidification rate of the emergency dehumidification series is given by the formula... The description is as follows, while the dehumidification rate of a normal purification column is... By switching the system at the optimal switching point, dehumidification efficiency can be maximized.

[0110] Furthermore, this step involves several key parameters, including the emergency dehumidification train flow rate. Normal purification column flow rate , Concentration of water at the outlet of the dehumidifier in case of an accident Total volume of primary circuit medium Initial water concentration Ultimate target water concentration and optimal humidity switching The accurate acquisition and input of these parameters are fundamental to ensuring the reliability of the optimization model's calculation results.

[0111] Furthermore, this step applies to the dehumidification process of the HTR-PM primary loop system during the commissioning phase, especially when the system is hot (approximately...). Under normal operating conditions, all moisture in the internal components of the reactor has evaporated, and the system has entered a stable dehumidification phase. By collecting and comparing data during actual operation, the effectiveness of the optimization method in shortening the construction period and reducing the number of molecular sieve bed regenerations can be verified.

[0112] Specifically, this step uses quantitative comparison to visually demonstrate the superiority of the optimized method compared to the traditional method. For example, in the implementation case, the optimized total dehumidification time was shortened to... Compared to traditional methods Reduced Meanwhile, the number of molecular sieve bed regeneration times is reduced from Second drop This significantly reduced system operating costs and complexity. This step not only verified the accuracy of the theoretical model but also provided reusable evaluation methods and data support for the subsequent commissioning and optimization of the high-temperature gas-cooled reactor system.

[0113] This invention discloses an optimization method for switching the primary loop dehumidification train in a high-temperature gas-cooled reactor. By systematically acquiring the operating parameters of the dehumidification train and the state of the primary loop medium, and establishing a mathematical model based on the dynamic dehumidification rate characteristics of the emergency dehumidification train and the normal purification train under different humidity levels, the optimal switching humidity is accurately calculated when their dehumidification rates are equal. This effectively solves the problems of traditional methods, such as reliance on experience-based judgment for switching timing, low dehumidification efficiency, and high operating costs. After heating the primary loop to a hot operating condition and confirming complete evaporation of moisture, the method starts the emergency dehumidification train for dehumidification and monitors concentration changes in real time. When the optimal switching humidity is reached, it automatically switches to the normal purification train to continue deep dehumidification until the final target concentration is reached. This invention achieves quantitative decision-making and dynamic optimization control of the dehumidification process, significantly shortening the overall dehumidification period, effectively reducing the regeneration frequency of the molecular sieve bed and system operating energy consumption, and improving the economy, reliability, and engineering applicability of the commissioning process.

[0114] Example 2 To achieve the above invention, embodiments of the present invention also provide specific steps for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, such as... Figure 2 As shown, it includes: The embodiments of the present invention determine the primary loop water concentration (i.e., the optimal switching humidity) when the dehumidification rates of the emergency dehumidification column and the normal purification column are equal under different humidity conditions, based on the dehumidification rate characteristics of the two columns. This concentration is then used as the switching point for the dehumidification column. The specific steps are as follows: In one embodiment of the present invention, the relevant parameters are determined.

[0115] Specifically, key parameters in the HTR-PM primary loop heating and dehumidification process are collected, including: flow rate Q1 of the helium purification emergency cooling dehumidification train, flow rate Q2 of the helium purification system normal purification train, water concentration a at the outlet of the helium purification emergency cooling dehumidification train, total volume V of the primary loop medium, initial water concentration C0 under primary loop hot operating conditions, and final target water concentration C_final (usually 2 ppm) for primary loop dehumidification.

[0116] In one embodiment of the present invention, the dehumidification rate of the helium purification accident cooling dehumidification column is [not specified].

[0117] Specifically, let the concentration of the primary loop medium water at time t be x1, and the formula for calculating the concentration of the primary loop medium water is: ; Among them, C0 ＇ The dehumidification constant is used for cooling and dehumidification during helium purification accidents.

[0118] The dehumidification rate of the helium purification accident cooling and dehumidification train is: v1= .

[0119] In one embodiment of the present invention, the dehumidification rate of the helium purification normal column is [not specified].

[0120] Specifically, let the concentration of the primary loop medium water at time t be x2, and the formula for calculating the concentration of the primary loop medium water is: ; Among them, C0 ＇＇ This is the dehumidification constant for normal helium purification.

[0121] The dehumidification rate of a normal helium-purified column is: v2= .

[0122] In one embodiment of the invention, optimal switching humidity calculation is performed.

[0123] Specifically, when the primary loop humidity is high, the dehumidification rate of the emergency dehumidification train is much higher than that of a normal purification train. However, limited by the concentration 'a' of the outlet water of the helium purification emergency cooling dehumidification train, the dehumidification rate of the emergency train will tend to a stable value when the primary loop humidity drops to a certain level. Therefore, the optimal process for primary loop heating and dehumidification is as follows: first, use the emergency dehumidification train to dehumidify to a certain humidity level in the primary loop, at which point the dehumidification rate of the emergency dehumidification train is equal to that of a normal train; then, switch from the emergency dehumidification train to a normal purification train for dehumidification.

[0124] Furthermore, by substituting the relevant parameter values ​​into the calculation, the optimal switching humidity x0 can be obtained. That is, when the water concentration in the primary loop drops to x0, the dehumidification rates of the emergency dehumidification train and the normal purification train are equal, and this is the optimal switching time.

[0125] In one embodiment of the present invention, the dehumidification time is calculated after optimization.

[0126] Specifically, the dehumidification time of the emergency dehumidification train is calculated as follows: based on the dehumidification rate of the helium purification emergency cooling dehumidification train, the initial humidity conditions of the primary loop, and the optimal switching humidity, the dehumidification time t1 of the emergency dehumidification train can be calculated.

[0127] Furthermore, the dehumidification time of the normal purification column is calculated as follows: Based on the dehumidification rate of the normal purification column, the optimal switching humidity, and the final dehumidification target of the first loop, the dehumidification time t2 of the normal purification column can be calculated.

[0128] Furthermore, the total dehumidification time is: the optimized total dehumidification time t0 = t1 + t2.

[0129] In one embodiment of the present invention, the optimized dehumidification process is implemented.

[0130] Specifically, after the primary loop is heated to a hot state (250°C) and all moisture in the reactor internals has evaporated, the helium purification emergency cooling and dehumidification train is put into operation for dehumidification. The water concentration in the primary loop is monitored in real time. When the water concentration drops to the optimal switching humidity x0, the emergency dehumidification train is stopped and switched to the normal purification train of the helium purification system. The water concentration in the primary loop is monitored until the water concentration drops to the final target concentration, and the dehumidification process is completed.

[0131] This invention discloses a method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor. By establishing a mathematical model based on the dynamic dehumidification rate characteristics of the emergency dehumidification train and the normal purification train, the optimal switching humidity is precisely calculated when their rates are equal. This transforms the traditional experience-based switching operation into a quantitative decision-making and dynamic optimization control process. It effectively solves the problems of low dehumidification efficiency, extended construction period, and high operating costs caused by improper switching timing in existing technologies. By monitoring water concentration in real time and performing train switching at the optimal switching point, the scientific allocation of dehumidification resources and efficient connection of the entire process are achieved, significantly shortening the overall dehumidification period and effectively reducing the regeneration frequency of the molecular sieve bed in the normal purification train and the system's operating energy consumption. This invention improves the efficiency, economy, and operational reliability of the primary loop dehumidification process and enhances the engineering applicability of this method in nuclear power plant commissioning.

[0132] Example 3 To achieve the above invention, embodiments of the present invention also provide an application scenario for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, including: Specifically, it possesses the equipment and systems required for the HTR-PM primary loop heating and dehumidification process, including the main helium fan, helium purification emergency cooling and dehumidification train, helium purification system normal purification train, water concentration monitoring device, etc.; it has known relevant parameters of the HTR-PM primary loop, such as the flow rate of the helium purification emergency cooling and dehumidification train, the flow rate of the normal purification train, the water concentration at the outlet of the emergency dehumidification train, the total volume of the primary loop medium, the initial water concentration, the final target water concentration, etc.; it has the ability to monitor water concentration in real time, and can accurately obtain water concentration change data during the primary loop dehumidification process to ensure timely switching of the dehumidification train when the optimal humidity is reached.

[0133] Furthermore, the specific implementation steps include (such as) Figure 3 (as shown) (1) Parameter collection and confirmation: Collect parameters such as the flow rate of the helium purification emergency cooling dehumidification train Q1, the normal purification train flow rate Q2, the outlet water concentration a of the emergency dehumidification train, the total volume of the primary loop medium V, the initial hot water concentration C0 of the primary loop, and the final target water concentration C0. Confirm the accuracy of the parameters through on-site measurement or design data.

[0134] (2) Calculation of optimal switching humidity: The humidity of the first loop when the dehumidification rate of the emergency dehumidification column is equal to the dehumidification rate of a normal column is the optimal switching humidity x0.

[0135] (3) Preparation for dehumidification process: Heat the primary loop to hot state (250°C) to ensure that all moisture in the reactor internals evaporates. Check the operating status of the helium purification accident cooling dehumidification train, normal purification train and water concentration monitoring device to ensure that the equipment is in normal condition.

[0136] (4) Dehumidification stage of the emergency dehumidification train: The helium purification emergency cooling dehumidification train is put into operation, the water concentration monitoring device is turned on, the change of primary circuit water concentration is monitored in real time, and relevant data is recorded.

[0137] (5) Dehumidification column switching: When the water concentration in the primary loop drops to the optimal switching humidity x0, the helium purification emergency cooling dehumidification column is shut down, and the normal purification column of the helium purification system is put into operation to complete the dehumidification column switching.

[0138] (6) Normal purification column dehumidification stage: Continue to monitor the water concentration of the first loop through the water concentration monitoring device until the water concentration drops to the final target concentration C, then shut down the normal purification column to complete the first loop dehumidification process.

[0139] (7) Effect verification: Record the total time of the optimized dehumidification process and compare it with the time of the traditional dehumidification method to verify the optimization effect; at the same time, record the number of times the molecular sieve bed is regenerated to evaluate the reduction in operating costs.

[0140] In addition, taking the optimization of the heating and dehumidification process in the first loop of HTR-PM B stage as an example, the implementation process is as follows: Specifically, parameter collection: Helium purification accident cooling dehumidifier flow rate Q1 = 625.5924 m³ / h, normal purification flow rate Q2 = 23.6967 m³ / h, accident dehumidifier outlet water concentration a = 335.2857 ppm, primary loop medium total volume V = 473.93 m³, primary loop hot initial water concentration C0 = 30412 ppm, final target water concentration C_final = 2 ppm; Optimal switching humidity calculation: The optimal switching humidity x = 348.4859 ppm was calculated; Dehumidification process implementation: The primary loop was heated to 250°C. After confirming that all moisture in the reactor components had evaporated, the accident dehumidifier was put into operation, and the water concentration monitoring device was activated. The initial water concentration was 30412 ppm. During the dehumidification process, the water concentration was monitored in real time. When the water concentration dropped to 348.4859 ppm, the accident dehumidifier was shut down, and the normal purification train was put into operation. Water concentration monitoring continued for 103.0 h. Afterwards, the water concentration dropped to 2 ppm, the normal purification column was shut down, and dehumidification was completed. Effect verification: The total dehumidification time after optimization was 108.9 h, while the total dehumidification time of the traditional method was 116.8 h, shortening the construction period by 7.9 h. The number of molecular sieve bed regeneration times in the normal purification column was reduced from 3 times in the traditional method to 1 time, which significantly reduced the operating cost and complexity, verifying the effectiveness of the optimized method of the present invention.

[0141] Example 4 To achieve the above invention, such as Figure 4 As shown, this embodiment also provides a high-temperature gas-cooled reactor primary loop dehumidification train switching timing optimization device 10, which includes: The parameter acquisition module 100 is used to acquire the flow rate and outlet water concentration of the helium purification emergency cooling and dehumidification column, as well as the flow rate of the normal purification column, and to determine the total volume of the primary loop medium, the initial hot water concentration, and the final target water concentration.

[0142] The humidity calculation module 200 is used to calculate the primary loop water concentration when the dehumidification rates of the emergency dehumidification column and the normal purification column are equal under different humidity conditions, and to use this as the optimal switching humidity.

[0143] The operating condition start-up module 300 is used to heat the primary loop to a hot operating condition and, after confirming that the moisture in the reactor components has completely evaporated, to start the emergency dehumidification train for dehumidification operation, while simultaneously monitoring the changes in the primary loop water concentration in real time.

[0144] The column switching module 400 is used to shut down the emergency dehumidification column and switch to the normal purification column to continue dehumidification when the concentration of the primary loop water drops to the optimal switching humidity.

[0145] The process monitoring module 500 is used to continuously monitor the primary loop water concentration until the final target water concentration is reached, thus completing the dehumidification process.

[0146] In one embodiment of the present invention, it further includes: a recording module, used to record the total time of the optimized dehumidification process. Compared with the number of molecular sieve bed regenerations and the dehumidification time of traditional methods. and number of regenerations A comparative analysis was conducted to verify the optimization effect.

[0147] 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.

[0148] To implement the methods of the above embodiments, the present invention also provides a computer device, such as... Figure 5 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 the switching timing of the primary loop dehumidification train of a high-temperature gas-cooled reactor.

[0149] 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 method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor as described in the foregoing embodiments.

[0150] 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.

[0151] 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 the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, characterized in that, include: S1, obtain the flow rate and outlet water concentration of the helium purification emergency cooling and dehumidification column, as well as the flow rate of the normal purification column, and at the same time determine the total volume of the primary loop medium, the initial hot water concentration, and the final target water concentration. S2, based on the dehumidification rate characteristics of the emergency dehumidification column and the normal purification column under different humidity, calculate the primary loop water concentration when the dehumidification rates of the two are equal as the optimal switching humidity; S3: After heating the primary circuit to hot operating conditions and confirming that all moisture in the reactor components has evaporated, start the emergency dehumidification train to perform dehumidification operation, while monitoring the changes in primary circuit water concentration in real time. S4, when the concentration of the primary circuit water drops to the optimal switching humidity, shut down the emergency dehumidification column and switch to the normal purification column to continue dehumidification; S5 continuously monitors the primary loop water concentration until the final target water concentration is reached, thus completing the dehumidification process.

2. The method as described in claim 1, characterized in that, The method of calculating the primary loop water concentration when the dehumidification rates of the emergency dehumidification train and the normal purification train are equal under different humidity conditions, based on the dehumidification rate characteristics of the two trains, is used as the optimal switching humidity. This includes: S21, according to formula and Calculate the dehumidification rates of the emergency dehumidification train and the normal purification train separately; S22, through joint The equation is solved to obtain the optimal switching humidity. The specific value.

3. The method as described in claim 1, characterized in that, After heating the primary circuit to hot operating conditions and confirming that all moisture in the reactor components has evaporated, the emergency dehumidification train is activated for dehumidification, while simultaneously monitoring changes in the primary circuit water concentration in real time, including: S31, heat the primary circuit to Thermal operating conditions; S32 confirmed that the moisture in the reactor internals had completely evaporated using an infrared moisture detector and a dew point analyzer.

4. The method as described in claim 1, characterized in that, The step of shutting down the emergency dehumidification column and switching to the normal purification column to continue dehumidification when the primary loop water concentration is detected to drop to the optimal switching humidity includes: S41, shut down the main helium fan and dryer of the helium purification emergency cooling and dehumidification train; S42, start the molecular sieve bed adsorption device of the normal purification column of the helium purification system, and adjust the system pressure to the design conditions.

5. The method as described in claim 1, characterized in that, The continuous monitoring of the primary loop water concentration until the final target water concentration is reached to complete the dehumidification process includes: The S51 uses an online electrolysis humidity monitoring device, which collects water concentration data every 15 minutes. S52, when the water concentration is measured three times consecutively below the final target water concentration When the time is right, the dehumidification process is considered complete.

6. The method as described in claim 1, characterized in that, Also includes: S6, record the total time of the optimized dehumidification process. Compared with the number of molecular sieve bed regenerations and the dehumidification time of traditional methods. and number of regenerations A comparative analysis was conducted to verify the optimization effect.

7. A device for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor, characterized in that, include: The parameter acquisition module is used to acquire the flow rate and outlet water concentration of the helium purification emergency cooling and dehumidification column, as well as the flow rate of the normal purification column, and to determine the total volume of the primary loop medium, the initial hot water concentration, and the final target water concentration. The humidity calculation module is used to calculate the primary loop water concentration when the dehumidification rates of the emergency dehumidification column and the normal purification column are equal under different humidity conditions, and to use this as the optimal switching humidity. The operating condition start-up module is used to heat the primary loop to the hot operating condition and, after confirming that the moisture in the reactor components has completely evaporated, to start the emergency dehumidification train for dehumidification operation, while monitoring the changes in the primary loop water concentration in real time. The column switching module is used to shut down the emergency dehumidification column and switch to the normal purification column to continue dehumidification when the concentration of the primary loop water drops to the optimal switching humidity. The process monitoring module is used to continuously monitor the primary loop water concentration until the final target water concentration is reached, thus completing the dehumidification process.

8. The apparatus as claimed in claim 7, characterized in that, Also includes: The recording module is used to record the total time of the optimized dehumidification process. Compared with the number of molecular sieve bed regenerations and the dehumidification time of traditional methods. and number of regenerations A comparative analysis was conducted to verify the optimization effect.

9. An electronic device, comprising: processor; The memory stores executable instructions; when the processor executes the instructions, it implements the method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor as described in any one of claims 1-6.

10. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, it implements a method for optimizing the switching timing of the primary loop dehumidification train in a high-temperature gas-cooled reactor as described in any one of claims 1-6.

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