High-temperature gas cooled reactor primary loop heating and dehumidification test system and application thereof

Abstract

The invention discloses a high-temperature gas cooled reactor primary loop heating and dehumidification test system and application thereof, and belongs to the technical field of high-temperature gas cooled reactors. The system comprises a dry gas supply module, a wet gas supply module, a carbon material container, a gas discharge module and a weight analysis module, and the dry gas supply module, the wet gas supply module, the carbon material container, the gas discharge module and the weight analysis module are used for respectively obtaining a humidified carbon material sample and a dehumidified carbon material sample from the carbon material container; respectively weighing the humidified carbon material sample and the dehumidified carbon material sample, respectively carrying out drying treatment on the humidified carbon material sample and the dehumidified carbon material sample, and re-measuring the dried carbon material sample after the drying treatment; and the dehumidification effect is analyzed according to the weight difference of the carbon material samples. According to the invention, the humidity data and the temperature data of the carbon material during dehumidification test by different dehumidification methods can be obtained, so that the debugging time of the multi-module high-temperature gas cooled reactor can be better shortened.

Description

Technical Field

[0001] The present invention relates to a primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor and its application, belonging to the technical field of high-temperature gas-cooled reactors. Background Art

[0002] The high-temperature gas-cooled reactor (HTGR) is one of the reactor types with the characteristics of the fourth-generation nuclear power. A large amount of carbonaceous materials are loaded in the high-temperature gas-cooled reactor. The carbonaceous materials will be directly exposed to the air during production, transportation, and installation. However, due to the porous material characteristics of the carbonaceous materials, their internal pores will adsorb impurity gases in the air when contacting the air, especially water vapor impurities. In the high-temperature environment during the operation of the reactor, water vapor will undergo a chemical corrosion reaction with the carbonaceous materials, which will affect the mechanical properties and strength of the carbonaceous materials, not only shortening their service life, but also posing a certain threat to the safe operation of the reactor. Therefore, the water content in the core of the reactor must meet the predetermined requirements. For example, at normal temperature and pressure, the water vapor content that can be adsorbed by boron-containing carbon BC materials and nuclear graphite IG110 materials is about 0.1%.

[0003] In the prior art, for the carbonaceous material such as graphite in the high-temperature gas-cooled reactor, most of the research focuses on the mechanical properties of graphite and the research on the oxidation and corrosion process of graphite after a primary circuit water inlet accident. There is almost no test data on the moisture equivalent diffusion coefficient of the porous medium material with low moisture content such as the carbonaceous material in the high-temperature gas-cooled reactor, and there is also less research on its humidity analysis and dehumidification process means. Summary of the Invention

[0004] The purpose of the present invention is to provide a primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor, which can obtain humidity data and temperature data when different dehumidification methods are used to dehumidify carbonaceous materials, and thus better shorten the commissioning time of a multi-module high-temperature gas-cooled reactor.

[0005] The structure of the primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor provided by the present invention is as follows, including:

[0006] A dry gas supply module, which provides heated dry working gas;

[0007] A wet gas supply module, which adds a predetermined amount of water vapor to the ambient gas to obtain ambient gas with an expected humidity;

[0008] A carbonaceous material container, which accommodates carbonaceous materials and switches to receive the heated dry working gas or the ambient gas with an expected humidity provided by the dry gas supply module or the wet gas supply module, so that the carbonaceous materials are in the heated dry working gas for dehumidification or in the ambient gas with an expected humidity for humidification;

[0009] A gas emission module that processes and emits the heated dry working gas or ambient gas with the expected humidity in the carbon material container to form the pressure difference required for gas flow in the carbon material container or to form a vacuum environment to dehumidify the carbon material;

[0010] A circulation module that forms an air flow circuit in the carbon material container to facilitate more thorough dehumidification of the carbon material in the carbon material container;

[0011] A gravimetric analysis module that respectively obtains the humidified carbon material sample and the dehumidified carbon material sample from the carbon material container, weighs the humidified carbon material sample and the dehumidified carbon material sample respectively, and respectively dries the humidified carbon material sample and the dehumidified carbon material sample and re-measures the dried carbon material sample after drying, and analyzes the dehumidification effect according to the weight difference of the carbon material samples.

[0012] Preferably, the carbon material container is composed of a first carbon material container and a second carbon material container in parallel with two lines. Among them, temperature measurement points are arranged at the upper, middle and lower parts of the first carbon material container and the second carbon material container, and the first carbon material container and the second carbon material container are used to load carbon materials of different materials.

[0013] Preferably, the circulation module dehumidifies the working gas through a low-pressure nitrogen circulation dehumidification process and / or a high-pressure helium circulation dehumidification process, and transports the dehumidified working gas to the dry gas supply module.

[0014] Preferably, the circulation module includes a diaphragm compressor that compresses the ambient gas or working gas in the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor to form an air flow circuit in the carbon material container.

[0015] Preferably, the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor of the present invention further includes an equipment cooling water module that cools the cooling equipment and compression equipment in the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor.

[0016] Preferably, the wet gas supply module includes a humidity generator that adds a predetermined amount of water mist to the ambient gas according to user settings.

[0017] Preferably, the dry gas supply module includes an electric heater that heats the dry working gas to obtain the heated dry working gas.

[0018] Preferably, the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor of the present invention further includes a gas filtration module that filters out solid particles and sample particles in the working gas output from the carbon material container.

[0019] The present invention further provides a method for heating and dehumidifying the primary circuit of a high-temperature gas-cooled reactor, comprising the following steps:

[0020] Providing heated dry working gas through the dry gas supply module;

[0021] Adding a predetermined amount of water vapor to the ambient gas through the wet gas supply module to obtain ambient gas with an expected humidity;

[0022] Containing carbon materials in the carbon material container, and switching to receive the heated dry working gas or the ambient gas with an expected humidity provided by the dry gas supply module or the wet gas supply module, so that the carbon materials are dehumidified in the heated dry working gas or humidified in the ambient gas with an expected humidity;

[0023] Processing and discharging the heated dry working gas or the ambient gas with an expected humidity in the carbon material container through the gas discharge module to form a pressure difference required for gas flow in the carbon material container or to form a vacuum environment for dehumidifying the carbon materials;

[0024] Forming an air flow circuit in the carbon material container through the circulation module to facilitate more thorough dehumidification of the carbon materials in the carbon material container;

[0025] Obtaining the humidified carbon material sample and the dehumidified carbon material sample from the carbon material container through the gravimetric analysis module respectively, weighing the humidified carbon material sample and the dehumidified carbon material sample respectively, and drying the humidified carbon material sample and the dehumidified carbon material sample respectively and re-measuring the dried carbon material sample after drying, and analyzing the dehumidification effect according to the weight difference of the carbon material samples.

[0026] Preferably, different materials of carbon materials are loaded in the first carbon material container and the second carbon material container.

[0027] Preferably, the working gas can be dehumidified by a low-pressure nitrogen circulation dehumidification process and / or a high-pressure helium circulation dehumidification process and / or a vacuum dehumidification process, and the dehumidified working gas is transported to the dry gas supply module.

[0028] Preferably, the cooling equipment and the compression equipment in the high-temperature gas-cooled reactor primary circuit heating and dehumidifying test system are cooled through the equipment cooling water module.

[0029] Preferably, according to the user setting, a predetermined amount of water mist is added to the ambient gas through the humidity generator.

[0030] Preferably, the dry working gas is heated by the electric heater to obtain the heated dry working gas.

[0031] Preferably, the solid particles and sample particles in the working gas output from the carbon material container are filtered by the gas filtration module.

[0032] Preferably, the ambient gas or working gas in the primary circuit heating and dehumidifying test system of the high-temperature gas-cooled reactor is compressed by the diaphragm compressor to form an air flow circuit in the carbon material container.

[0033] The present invention can obtain the humidity data and temperature data when different dehumidification methods are used to dehumidify the carbon material, so as to analyze the dehumidification effect of different dehumidification methods on the carbon material, and further shorten the commissioning time of the multi-module high-temperature gas-cooled reactor. Description of the Drawings

[0034] Figure 1 is a schematic diagram of a specific embodiment of the primary circuit heating and dehumidifying test system of the present application for high-temperature gas-cooled reactors;

[0035] Figure 2 is a schematic diagram of the system structure of the primary circuit heating and dehumidifying test system of the present application for high-temperature gas-cooled reactors;

[0036] Figure 3 is a schematic diagram of a specific embodiment of the primary circuit heating and dehumidifying test method of the present application for high-temperature gas-cooled reactors. Detailed Embodiments

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the presence of additional identical elements in the process, method, article or device including the said elements.

[0038] The inventive concept of the present application is: Based on the background of the primary circuit heating and dehumidifying commissioning test process of the high-temperature gas-cooled reactor, a set of test methods for the primary circuit heating and dehumidifying technology is established. By comparing and studying the influence of three commissioning test process methods, namely high pressure, low pressure and vacuum pumping, on the commissioning test duration of dehumidification, and obtaining test data such as humidity and temperature, it is of great significance for shortening the commissioning duration of the multi-module high-temperature gas-cooled reactor.

[0039] Through the design of a wet gas supply module, a dry gas supply module, a carbon material container, an exhaust module, a circulation module, and an equipment cooling water module, as well as the coordinated scheduling and operation among the modules, this application can verify the dehumidification effects of different dehumidification processes on carbon materials of different materials and different humidities, that is, it can realize the research on the dehumidification technology of nuclear graphite carbon materials.

[0040] The high-temperature gas-cooled reactor primary loop heating and dehumidification test system provided by this application includes:

[0041] A dry gas supply module that provides heated dry working gas; a wet gas supply module that adds a predetermined amount of water vapor to the ambient gas to obtain ambient gas with an expected humidity; a carbon material container that accommodates carbon materials and alternately receives the heated dry working gas provided by the dry gas supply module or the ambient gas with an expected humidity provided by the wet gas supply module, so that the carbon materials are in the heated dry working gas for dehumidification or in the ambient gas with an expected humidity for humidification; a gas exhaust module that processes and discharges the heated dry working gas or the ambient gas with an expected humidity in the carbon material container to form a pressure difference required for gas flow in the carbon material container or to form a vacuum environment for dehumidifying the carbon materials; a circulation module that forms an air flow circuit in the carbon material container to facilitate more thorough dehumidification of the carbon materials in the carbon material container; a gravimetric analysis module that respectively obtains a humidified carbon material sample and a dehumidified carbon material sample from the carbon material container, weighs the humidified carbon material sample and the dehumidified carbon material sample respectively, and respectively dries the humidified carbon material sample and the dehumidified carbon material sample and re-measures the dried carbon material sample after drying, and analyzes the dehumidification effect based on the weight difference of the carbon material samples.

[0042] In this application, the carbon material in the carbon material container is humidified by using the ambient gas with the expected humidity generated by the wet gas supply module, and after a predetermined time, a carbon material sample is obtained from the carbon material container through the gravimetric analysis module, and the carbon material sample is weighed. Then, the carbon material sample is dried and the dried carbon material sample is re-measured after the drying process to obtain experimental data and record the two measurement results. Then, by using the dry gas supply module or the gas discharge module, the humidified carbon material in the carbon material container is dehumidified. After a predetermined time, a carbon material sample is obtained from the carbon material container through the gravimetric analysis module, the carbon material sample is weighed, and then the carbon material sample is dried and the dried carbon material sample is re-measured after the drying process to obtain the experimental data after dehumidification and record the two experimental measurement results. Analyze the dehumidification effects of different dehumidification methods on the carbon material of the same material at the same time to obtain the analysis result, that is, the gravimetric analysis module of this application determines the dehumidification effect by comparing the dehumidification of the carbon material sample in the carbon material container by using the dry gas supply module and the dehumidification of the carbon material sample in the carbon material container by forming a vacuum environment through the gas discharge module.

[0043] The following uses specific embodiments to elaborate in detail on the technical solution of this application and how the technical solution of this application solves the above technical problems.

[0044] The specific embodiments described below can be combined with each other to form new embodiments. For the same or similar ideas or processes described in one embodiment, they may not be repeated in some other embodiments. The embodiments of this application will be described below with reference to the drawings.

[0045] Figure 1 An embodiment of the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor of this application is shown.

[0046] Figure 1The high-temperature gas-cooled reactor primary loop heating and dehumidification test system shown in the figure includes: a dry gas supply module 101 that provides heated dry working gas; a wet gas supply module 102 that adds a predetermined amount of water vapor to ambient gas to obtain ambient gas with an expected humidity; a carbon material container 103 that houses carbon materials and alternately receives the heated dry working gas or the ambient gas with an expected humidity provided by the dry gas supply module or the wet gas supply module, so that the carbon materials are in the heated dry working gas for dehumidification or in the ambient gas with an expected humidity for humidification; a gas discharge module 104 that processes and discharges the heated dry working gas or the ambient gas with an expected humidity in the carbon material container to form the pressure difference required for gas flow in the carbon material container or to form a vacuum environment for dehumidifying the carbon materials; a circulation module 105 that forms an air flow loop in the carbon material container to facilitate more thorough dehumidification of the carbon materials in the carbon material container; a gravimetric analysis module 106 that respectively obtains the humidified carbon material samples and the dehumidified carbon material samples from the carbon material container, weighs the humidified carbon material samples and the dehumidified carbon material samples respectively, and respectively dries the humidified carbon material samples and the dehumidified carbon material samples and re-measures the dried carbon material samples after drying, and analyzes the dehumidification effect based on the weight difference of the carbon material samples. This specific embodiment can obtain the humidity data and temperature data when different dehumidification methods are used to dehumidify carbon materials, thereby analyzing the dehumidification effects of different dehumidification methods on carbon materials, and further better shortening the commissioning time of the multi-module high-temperature gas-cooled reactor.

[0047] For example, the dehumidification effects of two materials, carbon material IG110 and boron-containing carbon BC carbon material, are tested using the high-temperature gas-cooled reactor primary loop heating and dehumidification test system of the present application in the low-pressure nitrogen dehumidification method, the high-pressure helium dehumidification method, and the vacuum dehumidification method. The present application conducts the dehumidification effect test on carbon material IG110 and boron-containing carbon BC carbon material when the mass of carbon material IG110 in the graphite carbon material is 1.1 tons, the mass of boron-containing carbon BC carbon material is 1.1 tons, the system pressure is 8.0 MPa, the system design temperature is 350 °C, and the medium materials are vacuum, nitrogen, and helium.

[0048] Figure 2 is the system structure schematic diagram of the high-temperature gas-cooled reactor primary loop heating and dehumidification test system of the present application, and Table 1 is the corresponding equipment list. Figure 2 [[ID=�]]The parameters and performance indicators detected by the sensors in are shown in Table 2. Figure 2The valve coding in it and its corresponding relationship with the ball valve or globe valve, as well as data such as the specifications of the valve, the materials of the valve, and the working parameters and design parameters of the valve, and data such as the connection method are not elaborated in this application. Among them, the valve is used to control the flow direction and whether the gas flows in the system of the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor. It can be an electrically controlled valve or a valve controlled manually. The specific switching sequence and method are not elaborated in this application.

[0049] Table 1 Figure 2 the equipment in

[0050] Serial number Number Equipment name Serial number Number Equipment name 1 AT001 Humidity generator 9 AT009 Gas storage tank 2 AT002 Electric heater 10 AN001 Exhaust machine 3 AT003 BC carbon material sample container 11 AN002 Vacuum pump 4 AT004 IG110 carbon material sample container 12 AN003 Circulating diaphragm compressor 5 AT005 Filter 13 AN004 Dry nitrogen compressor 6 AT006 Molecular sieve 14 AN005 Booster pump 7 AT007 Shell and tube cooler 15 AN006 Steam-water separation device 8 AT008 Plate cooler

[0051] Table 2 Figure 2 the parameters and performance indicators detected by the sensors in

[0052]

[0053]

[0054] From Figure 2 It can be seen from the schematic diagram of the system structure of the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor shown that the wet gas supply module includes a humidity generator AT001 and corresponding pipelines and valves. The wet gas supply module provides environmental gas with the expected humidity by adding an appropriate amount of water vapor generated by the humidity generator AT001 to the ambient air. Among them, the humidity generator AT001 adds a predetermined amount of water mist to the environmental gas according to the user settings.

[0055] The dry gas supply module includes a gas storage tank AT009, a booster pump AN004, and corresponding pipelines and valves. Among them, high-purity nitrogen or helium is stored in the gas storage tank AT009. And when using the low-pressure nitrogen dehumidification method or the high-pressure helium dehumidification method to dehumidify the humidified carbon material, the booster pump acts on the high-purity dry nitrogen or helium to make it enter the loop, and the high-purity dry nitrogen is heated by the electric heater AT002 to obtain the heated dry working gas for dehumidifying the humidified carbon material. Preferably, two gas storage tanks are designed to store high-purity dry nitrogen or helium respectively. By setting the dry working gas and the environmental gas with the expected humidity, the difference in the water vapor removal effect in the test experiment can be obtained through comparison. Here, by controlling the variables in the experimental process, the calculation amount in the analysis process can be simplified and the accuracy of the experimental results can be ensured. Among them, the booster pump is used to provide helium or nitrogen for the system.

[0056] A carbon material container that holds carbon materials and switches to receive the heated dry working gas or ambient gas with the expected humidity provided by a dry gas supply module or a wet gas supply module, enabling the carbon materials to be dehumidified in the heated dry working gas or humidified in the ambient gas with the expected humidity. The carbon material container includes a first carbon material container and a second carbon material container with two parallel lines. Among them, temperature measurement points are provided at the upper, middle, and lower parts of the first carbon material container and the second carbon material container. Different materials of carbon materials are loaded in the first carbon material container and the second carbon material container. Moreover, the loop structures of the two carbon material containers are exactly the same, and they can respectively load BC carbon materials and IG-110 carbon materials. There are corresponding carbon material sample containers AT003 and carbon material sample containers AT004 on the two loops. The ambient gas with the expected humidity humidifies the carbon materials in the carbon material container, and the heated dry working gas dehumidifies the humidified carbon materials in the carbon material container. Temperature measurement points are provided at the upper, middle, and lower parts of the container to facilitate better monitoring of the temperature data during the dehumidification process of the carbon materials and ensure the accuracy and objectivity of the data.

[0057] The gas discharge module includes two lines, namely, a bypass valve AA020 installed at the first exhaust outlet of the carbon material container with an exhaust fan AN001 and a vacuum pump AN002 installed at the second exhaust outlet. Moreover, a filter AT005, a shell-and-tube cooler AT007, and a standby plate cooler AT008 parallel to the shell-and-tube cooler AT007 are provided between the second outlet and the bypass valve AA020 of the vacuum pump AN002. That is, the gas discharge module needs to remove solid particles and sample particles through a gas filtration module. Among them, the first exhaust outlet can provide the pressure difference required for gas flow for the primary circuit heating and dehumidification test system of a high-temperature gas-cooled reactor. The gas passing through the first exhaust outlet can directly reach the ambient gas to achieve the direct exhaust function. The second exhaust outlet can be used to cool the working gas nitrogen or helium and discharge it from the carbon material container. At the same time, a vacuum environment can also be set for the carbon material container through the second exhaust outlet to conduct an experiment on dehumidifying the carbon materials in the carbon material container by the vacuum dehumidification method. Among them, the shell-and-tube cooler AT007 and the standby plate cooler AT008 are used to cool the working gas helium or nitrogen, and the exhaust fan AN001 is used to drive the ambient gas with the expected humidity through the test sample container.

[0058] A circulation module that dehumidifies the working gas through a low-pressure nitrogen circulation dehumidification process and / or a high-pressure helium circulation dehumidification process and transports the dehumidified working gas to the dry gas supply module. Through Figure 2It can be seen that the circulation system includes a steam-water separator AN006, a molecular sieve AT006, a helium circulation diaphragm compressor AN003, a standby low-pressure nitrogen dry compressor AN004 in parallel with the helium circulation diaphragm compressor AN003, and corresponding pipelines and valves. The circulation module will use the gas filtration module to remove solid particles and sample particles from the working gas containing water vapor, and use the low-pressure nitrogen dehumidification process and the high-pressure helium circulation dehumidification process. After dehumidification treatment using these two dehumidification processes, the dehumidified working gas is collected. By dehumidifying the working gas output from the carbon material container, it is possible to effectively avoid the influence of the working gas carrying water vapor on the experimental results, further ensure the accuracy of the experimental results. At the same time, by recycling the working gas, it is possible to avoid the impact on the environment when the working gas is a harmful gas, and it is also possible to reuse the recycled working gas, thereby reducing costs. Among them, the steam-water separator separates the water vapor and environmental gas in the environmental gas with the expected humidity and the working gas after dehumidification work. The helium circulation diaphragm compressor and the nitrogen dry compressor can drive the working gas to perform dehumidification circulation; the diaphragm compressor compresses the environmental gas or working gas in the primary loop heating and dehumidification test system of the high-temperature gas-cooled reactor to form an air flow loop in the carbon material container.

[0059] The equipment cooling water module cools the cooling equipment and compression equipment in the primary loop heating and dehumidification test system of the high-temperature gas-cooled reactor. The equipment cooling water module includes a chiller and corresponding pipelines and valves, and is used to cool the vacuum pump AN002, the shell-and-tube cooler AT007, the plate cooler AT008, and the circulation diaphragm compressor AN003 to ensure the controllability of the gas temperature during the experiment. Among them, the chiller is used to provide equipment cooling for the cold trap and the pumps that need to be cooled.

[0060] The gas filtration module filters out the solid particles and sample particles in the working gas output from the carbon material container. The gas filtration module includes a filter AT005 and a molecular sieve bed AT006. Among them, the filter AT005 can remove solid particles with a diameter of more than 0.5 μm in the gas output from the carbon material container, and the molecular sieve bed AT006 can filter the sample particles that may be contained in the working gas. The molecular sieve bed AT006 performs re-filtration after the filtration of the filter AT005. The molecular sieve bed AT006 performs the sieving treatment after the water vapor separation of the working gas by the circulation module. Through gas filtration, the purity of the working gas can be ensured, and at the same time, it is possible to avoid the unsmooth gas transmission caused by the accumulation of solid particles in the pipeline after long-term use of the equipment, and to avoid the influence of solid particles on the experimental results, ensuring the accuracy of the experimental data.

[0061] A gravimetric analysis module, which respectively obtains a humidified carbon material sample and a dehumidified carbon material sample from a carbon material container, weighs the humidified carbon material sample and the dehumidified carbon material sample respectively, and respectively performs a drying treatment on the humidified carbon material sample and the dehumidified carbon material sample and re-measures the dried carbon material sample after the drying treatment, and analyzes the dehumidification effect according to the weight difference of the carbon material samples. The gravimetric analysis module includes an analytical balance EX224ZH and an oven. Among them, the analytical balance is used to weigh the carbon material sample, and the oven is used to perform a drying treatment on the carbon material sample to facilitate the determination of the depth and effect of moisture absorption or dehumidification.

[0062] In a specific embodiment of the present application, the humidification and dehumidification effects of the carbon material can be displayed through the weight change of the carbon material sample, and the sampler cannot damage the test environment in the carbon container during the sampling process, affecting the accuracy and objectivity of the experimental data.

[0063] Based on the magnetic coupling sampler, a sampling operation is performed every 6 hours. The taken carbon material sample is weighed with an analytical balance, and the recorded time is t1 and the corresponding mass is m1. Then, the carbon material sample is put into the oven for drying. The oven temperature is set to 250 °C, and the drying duration is two hours. The dried carbon material sample is taken out and weighed with an analytical balance to obtain the mass m1. Judge the difference between the mass m1 and the mass m2. When the difference is less than 0.01%, the moisture content depth Δm of the sample at time t i is defined as: i

[0064]

[0065] Using each moisture content data point Δm obtained i generate a line graph about the sampling time t i to obtain the change curve of the moisture content depth Δmi of the carbon material with time under the humidification test or different dehumidification processes of the carbon material, so as to analyze the dehumidification effects of different dehumidification processes on carbon materials of different materials and different humidities. Among them, judging whether the difference between the carbon material before and after drying meets the threshold can ensure the accuracy of the experimental data and avoid the influence of equipment failures on the collection of experimental result data.

[0066] In particular, the sampling time interval, the drying temperature and duration of the dryer here are all exemplary and not the only limit values of the present application.

[0067] In a specific embodiment of the present application, the humidification process of the carbon material of the present application is mainly completed by the cooperation of a wet gas supply module, a carbon material sample container, and an emission module. As Figure 2 ​As shown, when conducting the experiment, first open valve AA035, start exhaust machine AN001 to provide air flow pressure, and then start humidity generator AT001 to supply ambient gas with a predetermined humidity to the system. During the humidification process, samples are taken every 6 hours through the magnetic coupling sampler installed in the middle of the carbon material sample container, and the moisture content depth of the samples is measured and analyzed by weighing with an analytical balance and using an oven. When the moisture content depth of the sample exceeds 0.5%, the moisture absorption capacity of the sample has reached saturation, meeting the requirements for the test. Therefore, stop humidifying the carbon material. At this time, first turn off exhaust machine AN001, and then close the pipeline valves. Analyze and process the recorded relevant data to obtain the water absorption performance results of the material.

[0068] In a specific embodiment of the present application, the low-pressure nitrogen dehumidification method mainly uses high-temperature and low-pressure nitrogen to purge and dehumidify the carbon material samples that have completed the humidification process. As Figure 2 shown, when conducting the experiment, first open the corresponding valves of the dry gas supply module, carbon material container, circulation module, and equipment cooling water module, and start the equipment cooling water module for cooling. Then, use booster pump AN005 to inject low-pressure nitrogen from gas storage tank AT009 into the system circuit and the carbon material sample container that has completed humidification, so that the pressure in the entire circulation circuit rises to about 0.5 MPa. During the subsequent circulation process, always pay attention to the pressure measurement point in the circuit to ensure pressure stability. After that, start circulation diaphragm compressor AN003 to make the working gas start to circulate, so that the nitrogen gas flow rate in the system reaches about 120 m 3 / h. Subsequently, start shell-and-tube cooler AT007, then turn on electric heater AT002 to heat the working gas to 300 °C, and then re-inject it into the carbon material sample container. The low-pressure and high-temperature nitrogen enters the carbon material sample container to carry out the sample moisture, and then enters filter AT005 to remove impurities such as dust. After that, the high-temperature nitrogen enters the shell-and-tube cooler for cooling, and is subjected to steam-water separation in the steam-water separator. The separated water is discharged to the waste water tank, and the nitrogen gas enters the molecular sieve to further remove moisture and sample solids. After that, the dry nitrogen is heated by electric heater AT002 again and enters the next cycle.

[0069] Start timing from the start of heating and take samples every 6 hours during the test, and measure and analyze the moisture content depth of the samples by using an analytical balance and an oven. Until the moisture content depth approaches stability, confirm that the dehumidification process of the low-pressure nitrogen dehumidification method ends and stop timing. Finally, turn off the electric heater and booster pump AN004. After the gas temperature in the circuit drops to a certain temperature, turn off shell-and-tube cooler AT007, turn off compression circulation pump AN003, and then open the discharge system to discharge the low-pressure nitrogen. Analyze and process the recorded relevant data to obtain the dehumidification effect of the low-pressure nitrogen dehumidification method.

[0070] In a specific embodiment of the present application, the high-pressure helium dehumidification process mainly uses high-temperature and high-pressure helium to purge and dehumidify carbon materials. As Figure 2 shown, when conducting the experiment, first open the corresponding valves of the dry gas supply module, carbon material container, circulation module, and equipment cooling water module, and start the equipment cooling water module for cooling treatment. Then, use the booster pump AN005 to inject high-pressure helium from the gas storage tank AT009 into the system circuit and the carbon material sample container after humidification, so that the gas pressure in the entire circulation circuit rises to about 7 MPa. Thereafter, during the circulation process, the pressure measuring point of the circuit should be continuously monitored to ensure pressure stability. Then, start the circulating diaphragm compressor AN004 to make the working gas start to circulate, so that the gas flow rate of helium reaches 120 m 3 / h. Subsequently, start the shell-and-tube cooler AT007, and then turn on the electric heater AT002 to heat the working gas to 300 °C. During the dehumidification process, the high-pressure and high-temperature helium enters the carbon material sample container to carry out the sample moisture, and then enters the filter AT005 to remove impurities such as dust. Thereafter, the high-temperature helium enters the shell-and-tube cooler for cooling, and gas-liquid separation is carried out in the gas-liquid separator. The separated water is discharged to the waste water tank, and the separated gas enters the molecular sieve to further remove the sample solids in the gas. Thereafter, the dry helium is heated by the electric heater AT002 again and enters the next cycle.

[0071] Start timing from the start of heating and take samples every 6 hours, and measure and analyze the moisture content depth of the samples through an analytical balance and an oven. Until the moisture content depth approaches stability, confirm that the dehumidification process is over and stop timing. Finally, turn off the electric heater and the booster pump AN004. After the gas temperature in the circuit drops to a certain temperature, turn off the shell-and-tube cooler AT007, turn off the compression circulation pump AN003, and then open the discharge system to discharge the high-pressure helium. Analyze and process the recorded relevant data to obtain the dehumidification effect of the high-pressure helium dehumidification process.

[0072] In a specific embodiment of the present application, the vacuum dehumidification method mainly relies on the vacuum pumping method to separate the moisture adsorbed in the sample, so as to achieve the dehumidification effect. As Figure 2 shown, when conducting the experiment, first close the valves at all locations in the circuit to avoid the valves affecting the extraction efficiency during the vacuum pumping process of the carbon material sample container and affecting the formation of the vacuum environment, that is, close the valves such as AA011, AA012, AA013, AA014, AA021, AA036, etc., and open the valves such as AA015, AA019, etc. Thereafter, turn on the vacuum pump AN002 to pump the system to a vacuum until the pressure of the system is 100 Pa and maintain the pressure of the system at about 100 Pa.

[0073] Start timing from the beginning of vacuum pumping and take samples every 6 hours. Analyze the moisture content depth of the samples using an analytical balance and an oven. Stop timing after the moisture content depth approaches stability, confirm the end of the dehumidification process, and turn off the vacuum pump and the relevant pipeline valves. Analyze and process the recorded relevant data to obtain the dehumidification effect of the vacuum dehumidification method.

[0074] Preferably, the parameter settings of the dehumidification methods in the above three embodiments should satisfy a maximum heating temperature of 250 °C, a maximum pressure of 7 MPa, and a vacuum degree less than 100 Pa.

[0075] In a specific embodiment of the present application, the applicable dehumidification methods for different materials of experimental materials can be determined by comparing and analyzing the experimental results of different dehumidification methods. Also, based on the humidification experimental data, the moisture absorption capacity of the materials can be determined to facilitate better analysis of the material properties.

[0076] Figure 3 The flow schematic diagram of the primary circuit heating and dehumidification test method for the high-temperature gas-cooled reactor of the present application is shown:

[0077] In Figure 3 In the specific embodiment shown, the primary circuit heating and dehumidification test method of the present invention for the high-temperature gas-cooled reactor mainly includes the following steps:

[0078] Step S301, provide heated dry working gas through the dry gas supply module;

[0079] Step S302, add a predetermined amount of water vapor to the ambient gas through the wet gas supply module to obtain ambient gas with an expected humidity;

[0080] Step S303, accommodate carbon materials in a carbon material container and switch to receive the heated dry working gas or the ambient gas with an expected humidity provided by the dry gas supply module or the wet gas supply module, so that the carbon materials are in the heated dry working gas for dehumidification or in the ambient gas with an expected humidity for humidification;

[0081] Step S304, process and discharge the heated dry working gas or the ambient gas with an expected humidity in the carbon material container through the gas discharge module to form the pressure difference required for gas flow in the carbon material container or form a vacuum environment for dehumidifying the carbon materials;

[0082] Step S305, form an air flow circuit in the carbon material container through the circulation module to facilitate more thorough dehumidification of the carbon materials in the carbon material container;

[0083] Step S306: Obtain the humidified carbon material sample and the dehumidified carbon material sample from the carbon material container through the weight analysis module respectively, weigh the humidified carbon material sample and the dehumidified carbon material sample respectively, and perform drying treatment on the humidified carbon material sample and the dehumidified carbon material sample respectively, and re-measure the dried carbon material sample after the drying treatment, and analyze the dehumidification effect according to the weight difference of the carbon material samples.

[0084] In a specific embodiment of the present application, the carbon material container includes a first carbon material container and a second carbon material container with two parallel lines. Among them, temperature measurement points are arranged at the upper, middle, and lower parts of the first carbon material container and the second carbon material container, and carbon materials of different materials are loaded in the first carbon material container and the second carbon material container.

[0085] In a specific embodiment of the present application, the working gas is dehumidified through a low-pressure nitrogen circulation dehumidification process and / or a high-pressure helium circulation dehumidification process and / or a vacuum dehumidification process, and the dehumidified working gas is transmitted to the dry gas supply module.

[0086] In a specific embodiment of the present application, the cooling equipment and the compression equipment in the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor are cooled through the equipment cooling water module.

[0087] In a specific embodiment of the present application, a humidity generator adds a predetermined amount of water mist to the ambient gas according to user settings.

[0088] In a specific embodiment of the present application, the dry working gas is heated through an electric heater to obtain the heated dry working gas.

[0089] In a specific embodiment of the present application, the solid particles and sample particles in the working gas output from the carbon material container are filtered through the gas filtration module.

[0090] In a specific embodiment of the present application, the water vapor and ambient gas in the ambient gas with the expected humidity and the working gas after dehumidification are separated through a steam-water separator.

[0091] In a specific embodiment of the present application, the diaphragm compressor compresses the ambient gas or the working gas in the primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor to form an air flow circuit in the carbon material container.

[0092] The primary circuit heating and dehumidification test method provided by the present application can implement the primary circuit heating and dehumidification test system described in any of the above embodiments, and its implementation principle and technical effects are similar, which will not be elaborated here.

[0093] In several embodiments provided by the present application, it should be understood that the disclosed modules and methods can be implemented in other ways. For example, the module embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

Claims

1. A primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor, comprising: A dry gas supply module that provides heated dry working gas; A wet gas supply module that adds a predetermined amount of water vapor to ambient gas to obtain ambient gas with a desired humidity; A carbon material container that houses carbon materials and alternately receives the heated dry working gas provided by the dry gas supply module or the ambient gas with a desired humidity provided by the wet gas supply module, such that the carbon materials are in the heated dry working gas for dehumidification or in the ambient gas with a desired humidity for humidification; A gas discharge module that processes and discharges the heated dry working gas or the ambient gas with a desired humidity in the carbon material container to create the pressure difference required for gas flow in the carbon material container or to create a vacuum environment for dehumidifying the carbon materials; A weight analysis module that respectively obtains carbon material samples after humidification and carbon material samples after dehumidification from the carbon material container, weighs the carbon material samples after humidification and the carbon material samples after dehumidification respectively, and respectively performs drying treatment on the carbon material samples after humidification and the carbon material samples after dehumidification and re-measures the dried carbon material samples after the drying treatment, and analyzes the dehumidification effect based on the weight difference of the carbon material samples.

2. The once-through coolant system of the high-temperature gas-cooled reactor for heating and dehumidifying test system according to claim 1, characterized in that: The primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor further includes a circulation module that forms an air flow circuit in the carbon material container to facilitate more thorough dehumidification treatment of the carbon materials in the carbon material container.

3. The once-through coolant system of the high-temperature gas-cooled reactor for heating and dehumidifying test according to claim 1 or 2, characterized in that: The carbon material container includes a first carbon material container and a second carbon material container with two parallel lines, which are used to load carbon materials of different materials.

4. The once-through coolant loop heating and dehumidifying test system for high temperature gas-cooled reactor according to claim 3, wherein: Temperature measurement points are provided at the upper, middle, and lower parts of the first carbon material container and the second carbon material container.

5. The once-through coolant system for high-temperature gas-cooled reactor heating and dehumidification test system according to any one of claims 2-4, characterized in that: The circulation module dehumidifies the working gas through a low-pressure nitrogen circulation dehumidification process and / or a high-pressure helium circulation dehumidification process, and transmits the dehumidified working gas to the dry gas supply module.

6. The once-through coolant system heating and dehumidifying test system for high-temperature gas-cooled reactors according to claim 5, characterized in that: The circulation module includes a diaphragm compressor that compresses the ambient gas or the working gas in the primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor to form an air flow circuit in the carbon material container.

7. The primary circuit heating and dehumidification test system of the high-temperature gas-cooled reactor according to any one of claims 1-6, characterized in that: The primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor further includes an equipment cooling water module that cools the cooling equipment and the compression equipment.

8. The once-through coolant system of the high-temperature gas-cooled reactor for heating and dehumidifying test according to any one of claims 1-7, characterized in that: The wet gas supply module includes a humidity generator that adds a predetermined amount of water mist to the ambient gas according to user settings; The dry gas supply module includes an electric heater that heats the dry working gas to obtain heated dry working gas.

9. The once-through coolant system of the high-temperature gas-cooled reactor for heating and dehumidifying test according to any one of claims 1-8, characterized in that: The primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor further includes a gas filtration module that filters out solid particles and sample particles in the working gas output from the carbon material container.

10. A primary circuit heating and dehumidification test method for a high-temperature gas-cooled reactor, including the following steps performed in the primary circuit heating and dehumidification test system for a high-temperature gas-cooled reactor according to any one of claims 1-9: Provide heated drying working gas through the drying gas supply module; Add a predetermined amount of water vapor to the ambient gas through the wet gas supply module to obtain ambient gas with an expected humidity; Contain carbon materials in the carbon material container, and switch to receive the heated drying working gas or the ambient gas with an expected humidity provided by the drying gas supply module or the wet gas supply module, so that the carbon materials are in the heated drying working gas for dehumidification or in the ambient gas with an expected humidity for humidification; Treat and discharge the heated drying working gas or the ambient gas with an expected humidity in the carbon material container through the gas discharge module to form a pressure difference required for gas flow in the carbon material container or form a vacuum environment for dehumidifying the carbon materials; Form an air flow circuit in the carbon material container through the circulation module to facilitate more thorough dehumidification of the carbon materials in the carbon material container; Obtain the humidified carbon material sample and the dehumidified carbon material sample from the carbon material container respectively through the gravimetric analysis module, weigh the humidified carbon material sample and the dehumidified carbon material sample respectively, and dry the humidified carbon material sample and the dehumidified carbon material sample respectively and re-measure the dried carbon material sample after drying, and analyze the dehumidification effect based on the weight difference of the carbon material samples.

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