Method, device, system and equipment for obtaining test data of steam-water separator

Abstract

This invention relates to the field of testing technology for steam-water separators, and discloses a method, apparatus, system, and equipment for acquiring test data of a steam-water separator. The method includes: starting the steam-water separator and inputting a steam-water mixture into it; starting an air drying heater to dry and heat the moisture in the air output from the steam-water separator; determining the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater based on a first air parameter at the inlet of the steam-water separator and a second air parameter at the outlet of the air drying heater; and determining the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator. This achieves online monitoring and measurement of the outlet air moisture content and separation efficiency of the steam-water separator.

Description

Technical Field

[0001] This invention relates to the field of testing technology for steam-water separators, and in particular to a method, apparatus, system, and equipment for acquiring test data of a steam-water separator. Background Technology

[0002] High-quality steam is one of the essential conditions for ensuring the safe and economical operation of nuclear power plants. As a key component of the steam generator, a main piece of equipment in nuclear power plants, the steam-water separator's function is to separate the steam and water mixture into two phases. Due to the complexity of the steam-water separator's structure and internal flow, its separation performance must be verified through testing during its development.

[0003] Currently, in cold-state screening tests of steam-water separators, the main methods used are air washing and sampling weighing to obtain the air moisture content at the separator outlet and the separator's separation efficiency. These parameters are then used as the test data. However, both of these methods are offline measurements, which cannot monitor and measure the separator's separation efficiency and air moisture content in real time. This results in significant data delays, affecting the test cycle and efficiency. Summary of the Invention

[0004] This invention provides a method, apparatus, system, and equipment for acquiring test data of a steam-water separator, in order to solve the technical problem that offline measurement methods cannot monitor and measure the separation efficiency of the steam-water separator and the moisture content of the air in real time, resulting in serious lag in test data and affecting the test cycle and test efficiency.

[0005] In a first aspect, a method for acquiring test data of a steam-water separator is provided, applied to a test data acquisition system for a steam-water separator, wherein the test data acquisition system for the steam-water separator includes a steam-water separator and an air drying heater, and the method includes:

[0006] In response to a request to acquire test data from the steam-water separator, the steam-water separator is started and a steam-water mixture is input into it, wherein the steam-water mixture is a mixture of air and water;

[0007] Start the air drying heater to dry and heat the moisture in the air output from the air-water separator;

[0008] Based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air drying heater, the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater are determined. The air parameters include relative humidity, air temperature and air pressure.

[0009] Based on the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator, the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator are determined.

[0010] According to a second aspect of this application, a test data acquisition device for a steam-water separator is provided, applied to a test data acquisition system for a steam-water separator, wherein the test data acquisition system for the steam-water separator includes a steam-water separator and an air drying heater, and the device includes:

[0011] The control module is used to respond to the test data acquisition request of the steam-water separator, start the steam-water separator, and input a steam-water mixture into the steam-water separator, wherein the steam-water mixture is a mixture of air and water;

[0012] The control module is also used to start the air drying heater, which dries and heats the moisture in the air output from the steam-water separator.

[0013] The first determining module is used to determine the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air dryer heater device. The air parameters include relative humidity, air temperature and air pressure.

[0014] The second determining module is used to determine the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity of water vapor at the outlet of the air dryer heater, the absolute humidity of water vapor, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator.

[0015] According to a third aspect of this application, a test data acquisition system for a steam-water separator is provided, comprising:

[0016] A steam-water separator is used to separate steam and water.

[0017] An air drying heater is used to dry and heat the moisture in the air separated by a steam-water separator. The input end of the air drying heater is connected to the output end of the steam-water separator.

[0018] According to a fourth aspect of this application, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method for acquiring test data of a steam-water separator.

[0019] In the above-mentioned scheme for acquiring test data of steam-water separator, the outlet air of the steam-water separator is dried and heated by an air drying heater. The water contained in the outlet air is converted into water vapor by heating. The air humidity is measured by an air humidity meter, and then the air humidity is converted into air water content by calculation. The separation efficiency is then calculated, so that all performance test data are calculated based on directly measurable gaseous water vapor. This enables real-time monitoring and measurement of test data of steam-water separator, overcoming the shortcomings of related technologies such as the inability to monitor test data in real time, complex operation, and long test cycle. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an application environment for a method of acquiring test data of a steam-water separator according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of a specific implementation method for step S20;

[0023] Figure 3 yes Figure 1 A schematic diagram of a specific implementation method for step S30;

[0024] Figure 4 yes Figure 1 A schematic diagram of a specific implementation of step S40;

[0025] Figure 5 This is a schematic diagram of the structure of a test data acquisition device for a steam-water separator according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the experimental data acquisition system of a steam-water separator in one embodiment of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 As shown, Figure 1 A flowchart illustrating the method for acquiring test data of a steam-water separator provided in an embodiment of the present invention includes the following steps:

[0029] S10: In response to a request to acquire test data from the steam-water separator, start the steam-water separator and input a steam-water mixture into the steam-water separator;

[0030] Among them, the soft drink mixture is a mixture of air and water;

[0031] The test data acquisition method for a steam-water separator provided by this invention can be applied to cold-state screening tests of steam-water separators in steam generators. During the development of the steam-water separator or before its operation, the test data acquisition system is used to acquire test data for evaluating the separator. Specifically, the test data acquisition system includes a steam-water separator and an air drying heater. The output end of the steam-water separator is connected to the input end of the air drying heater. The steam-water separator is used to separate the steam and water mixture into two phases, and the air drying heater is used to evaporate the water entrained in the air output from the steam-water separator into water vapor.

[0032] During the test, in response to the command to acquire test data of the steam-water separator, the steam-water separator is started, and the external raw compressed air and water are delivered to the system for mixing. After producing a steam-water mixture that meets the test requirements, it flows into the steam-water separator so that the steam-water separator can separate the steam and water into two phases.

[0033] Optionally, the test data acquisition system for the steam-water separator also includes a steam-water mixer, a first pipeline, and a second pipeline. The steam-water mixer is used to mix water and raw compressed air into a steam-water mixture, and the output end of the steam-water mixer is connected to the input end of the steam-water separator. The first pipeline is an air delivery pipeline used to inject air into the steam-water separator. The input end of the first pipeline is connected to an external system, and the output end is connected to the input end of the steam-water mixer. The second pipeline is a water delivery pipeline used to inject water into the steam-water separator. The input end of the second pipeline is connected to an external system, and the output end is connected to the input end of the steam-water mixer.

[0034] In practical applications, in response to a request to acquire test data from the steam-water separator, the separator is activated. Raw compressed air is continuously injected into the separator through the first pipe, while water is continuously injected through the second pipe. A steam-water mixer is used to mix the injected raw compressed air and water, and the resulting mixture is then transported to the steam-water separator. During this transport process, the air and water flow rates are controlled within a certain range to ensure the steam-water mixture flows evenly into the separator, meeting the test conditions for the steam-water separator.

[0035] S20: Start the air drying heater to dry and heat the moisture in the air output from the air-water separator.

[0036] In steam-water separator testing, the moisture content of the separated air is a key parameter for evaluation. Since air moisture content cannot be directly measured by instruments, related technologies typically employ air washing or sampling-weighing methods to measure the moisture content of the separated air. However, these methods are all offline, requiring specialized calibration tests and the system to be turned on and off at specific times, making the entire moisture content measurement procedure complex. Furthermore, under low moisture content conditions in a two-stage steam-water separator, the measurement time is long, leading to low efficiency in the overall performance test. To address these issues, this application proposes connecting an air drying heater to the output of the steam-water separator. This heater converts the water in the air at the separator outlet into water vapor, allowing for the measurement of gaseous water vapor data using an air humidity meter, which is then converted into air moisture content data, enabling online measurement of air moisture content.

[0037] Specifically, during the experiment, after the steam-water separator was running stably, the air drying heater was started to deliver the outlet air of the steam-water separator to the air drying heater. The air drying heater dries and heats the water droplets entrained in the outlet air, causing the moisture to evaporate into water vapor. The air parameters of the outlet humid air containing water vapor are measured to calculate the water content of the outlet air of the steam-water separator.

[0038] By using the above method, the water droplets entrained in the air are converted into water vapor by the air drying heater, so that the experimental data of the steam-water separator are all calculated based on gaseous water vapor. This simplifies the data processing process, avoids the complexity of liquid data processing, and makes the calculation more direct and simple.

[0039] In one embodiment of this application, a control scheme for the heating power of an air drying heater is provided, such as... Figure 2 As shown, after S20, that is, after starting the air drying heater, the following steps S21-S27 are also included:

[0040] S21: Control the operation of the air drying heater based on the preset heating power;

[0041] S22: When the air dryer heater is operating stably, obtain the dew point temperature at the outlet of the air dryer heater;

[0042] S23: Obtain the difference between the second air temperature and the dew point temperature;

[0043] S24: Compare the difference between the second air temperature and the dew point temperature with the preset temperature margin, and determine whether the difference between the second air temperature and the dew point temperature is less than the preset temperature margin. If yes, proceed to step S25; otherwise, proceed to step S27.

[0044] S25: Adjust the heating power of the air dryer heater according to the preset power boost value;

[0045] S26: According to the preset time interval, determine whether the difference between the second air temperature and the dew point temperature is less than the preset temperature margin. If the difference between the second air temperature and the dew point temperature is less than the preset temperature margin, adjust the heating power of the air drying heater according to the preset power increase value until the difference between the second air temperature and the dew point temperature is greater than or equal to the preset temperature margin.

[0046] S27: No need to adjust the heating power of the air dryer heater.

[0047] For steps S21-S27, during the evaluation process, once the air and water flow rates are monitored to be stable, the air drying heater is started and operated according to the preset heating power. The outlet temperature T1 and dew point temperature Tc of the air drying heater are monitored in real time. Once the air drying heater is operating stably (i.e., the operating power fluctuation is less than ±2% of the real-time power), the difference between the outlet temperature and the dew point temperature is calculated, and the calculated difference is compared with the preset temperature margin ΔT. If T1-T c ≥ΔT, at this time the heating power of the air dryer heater remains constant; if T1-T c <ΔT, at this point, the heating power W of the air dryer heater is increased according to the preset power ΔW (e.g., 5%W). After the increase, at a preset time interval (e.g., 1 minute), the difference between the outlet temperature and the dew point temperature is compared with the preset temperature margin again. If T1-T c If the power is less than ΔT, the power will continue to increase according to the preset power until T1-T. c ≥ΔT.

[0048] By means of the above method, the heating power of the air dryer is automatically adjusted based on the difference between the outlet temperature and the dew point temperature of the air dryer, so as to realize the automatic adjustment of the heating power and the full evaporation of water in the air under different test conditions, thereby realizing the wide range of accurate measurement of water content.

[0049] S30: Based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air drying heater, determine the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater;

[0050] The air parameters include relative humidity, air temperature, and air pressure.

[0051] The first air parameter refers to the parameters of the raw compressed air to be supplied at the inlet of the air-water separator. The raw compressed air can be air sampled from the external environment, which typically contains a small amount of moisture. Before the air and water are mixed, the first air parameters of the raw compressed air supplied to the system from the outside are measured, including the first air relative humidity, the first air temperature, and the first air pressure.

[0052] After the water droplets entrained in the air at the outlet of the air dryer are converted into water vapor by the air dryer heater, the air containing water vapor is discharged. The second air parameters of the outlet air are measured at the outlet of the air dryer heater, including the second air relative humidity, the second air temperature and the second air pressure.

[0053] After measuring the first air parameter and the second air parameter, the absolute humidity and relative humidity of water vapor in the air at the outlet of the air dryer are calculated using the first air parameter and the second air parameter. The absolute humidity of water vapor refers to the absolute humidity of water vapor generated after the water droplets in the air at the outlet of the air dryer evaporate, and the relative humidity of water vapor refers to the relative humidity of water vapor generated after the water droplets in the air at the outlet of the air dryer evaporate.

[0054] In the above method, all moisture exists in the gaseous state after drying and heating. The specific amount of water vapor contained in the air at the outlet of the air dryer is obtained as the basis for subsequent moisture content calculation, so that only gaseous moisture data needs to be processed in the calculation process, which simplifies the calculation complexity.

[0055] In one embodiment of this application, a method for obtaining the relative humidity and absolute humidity of water vapor at the outlet of an air drying heater is provided, such as... Figure 3 As shown, in S30, based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air drying heater, the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater are determined. The air parameters include relative humidity, air temperature, and air pressure. Specifically, this includes the following steps S31-S36:

[0056] S31: Obtain the first relative humidity, first air temperature and first air pressure at the inlet of the air-water separator;

[0057] S32: Obtain the second relative humidity, second air temperature, and second air pressure at the outlet of the air dryer heater;

[0058] For steps S31-S32, the test data acquisition system for the steam-water separator further includes a first temperature sensor, a first pressure sensor, and a first air humidity meter. The first temperature sensor, first pressure sensor, and first air humidity meter are installed on the first pipe and are used to measure the total humid air pressure, humid air temperature, and relative humidity of the raw compressed air supplied to the steam-water separator, respectively recorded as first air pressure, first air temperature, and first air relative humidity. Further, the test data acquisition system for the steam-water separator also includes a second temperature sensor, a second pressure sensor, and a second air humidity meter. The second temperature sensor, second pressure sensor, and second air humidity meter are installed on the air discharge pipe at the outlet of the air drying heater and are used to measure the total humid air pressure, humid air temperature, and relative humidity of the air at the outlet of the air drying heater, respectively recorded as second air pressure, second air temperature, and second air relative humidity.

[0059] By measuring temperature, pressure, and relative humidity using the above methods, key parameters are used to calculate the moisture content of the air at the outlet of the steam-water separator and the separation efficiency, thereby enabling online measurement of the moisture content of the air at the outlet of the steam-water separator and the separation efficiency.

[0060] S33: Based on the first air pressure, the second air pressure, the first air relative humidity, the first air temperature, and the second air temperature, determine the converted value of the air humidity at the outlet of the air drying heater;

[0061] The converted air humidity value refers to the converted value of the original compressed air humidity injected into the system in the humid air at the outlet of the air dryer heater. The first air pressure, first air temperature, and first air relative humidity at the inlet of the steam-water separator, as well as the second air pressure and second air temperature at the outlet of the air dryer heater, which are measured by the experiment, are imported into the air humidity conversion value calculation formula. Based on the multi-component gas thermodynamics method, the converted air humidity value at the outlet of the air dryer heater is calculated.

[0062] The formula for calculating the conversion value of air humidity is:

[0063] ;

[0064] Among them, the above This is the converted value of the air humidity at the outlet of the air dryer heater; the above The second air pressure at the outlet of the air drying heater; the above The first air pressure at the inlet of the steam-water separator; the above The first relative humidity of the air at the inlet of the steam-water separator; the above The first air temperature at the inlet of the steam-water separator; the above The second air temperature is at the outlet of the air dryer heater; A, B, C, and D are constants, A=1.2811805×10-5, B=1.9509874×10-2, C=34.04926034, and D=6.353611×103.

[0065] S34: Determine the water vapor relative humidity at the outlet of the air dryer based on the second relative humidity of the air at the outlet of the air dryer and the converted value of the air humidity at the outlet of the air dryer;

[0066] After calculating the converted value of air humidity at the outlet of the air dryer heater, the relative humidity of the water vapor generated after the evaporation of water droplets entrained in the air at the outlet of the air dryer heater is obtained by subtracting the converted value of the original compressed air humidity in the humid air from the measured relative humidity of the humid air at the outlet of the air dryer heater. This is denoted as the relative humidity of water vapor.

[0067] S35: Obtain the absolute humidity of the air at the outlet of the air dryer heater;

[0068] S36: Determine the absolute humidity of water vapor at the outlet of the air dryer based on the second relative humidity of air, the relative humidity of water vapor at the outlet of the air dryer, and the absolute humidity of air.

[0069] For steps S35-S36, the absolute humidity of the humid air at the outlet of the air dryer is measured and recorded as the absolute humidity of the air. The relative humidity of the humid air at the outlet of the air dryer, the absolute humidity of the humid air, and the calculated air humidity conversion value are imported into the formula for calculating the absolute humidity of water vapor. The absolute humidity occupied by the water vapor generated after the humid air at the outlet of the air dryer carries water droplets and evaporates is calculated and recorded as the absolute humidity of water vapor.

[0070] The formula for calculating absolute humidity of water vapor is:

[0071] ;

[0072] Among them, the above The absolute humidity of water vapor at the outlet of the air dryer heater; the above The second relative humidity of the air at the outlet of the air dryer heater; the above This is the converted value of the air humidity at the outlet of the air dryer heater; the above The absolute humidity of the air at the outlet of the air dryer heater.

[0073] S40: Based on the relative humidity of water vapor at the outlet of the air dryer heater, the absolute humidity of water vapor, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator, determine the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator.

[0074] After the water droplets entrained in the air separated by the steam-water separator have been converted into water vapor by the air drying heater, the water mass flow rate at the inlet of the steam-water separator is measured. Based on the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator, the water content of the air at the outlet of the steam-water separator can be obtained through heat balance calculation, and then the separation efficiency of the steam-water separator can be calculated.

[0075] Finally, the air moisture content and separation efficiency were used as performance test parameters to evaluate the steam-water separator.

[0076] In one embodiment of this application, a method for obtaining the air moisture content and separation efficiency at the outlet of a steam-water separator is provided, such as... Figure 4 As shown, in S40, the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator are used to determine the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator. This specifically includes the following steps S41-S48:

[0077] S41: Determine the first saturated water vapor partial pressure at the inlet of the steam-water separator based on the first air temperature;

[0078] The saturated water vapor partial pressure refers to the saturated water vapor partial pressure in the original humid air at the inlet of the steam-water separator. The measured humid air temperature at the inlet of the steam-water separator is imported into the saturated water vapor partial pressure calculation formula to calculate the first saturated water vapor partial pressure at the inlet of the steam-water separator.

[0079] The formula for calculating the partial pressure of saturated water vapor is:

[0080] ;

[0081] Among them, the above The first saturated water vapor partial pressure at the inlet of the steam-water separator; the above The first air temperature at the inlet of the steam-water separator; A, B, C, and D above are constants.

[0082] S42: Determine the first air density under the first air temperature and first air pressure conditions based on the first air temperature, first air pressure, first air relative humidity and first saturated water vapor partial pressure;

[0083] The measured total pressure, temperature and relative humidity of the humid air at the inlet of the steam-water separator are imported into the air density calculation formula to calculate the air density under the first air temperature and first air pressure conditions, and this is recorded as the first air density.

[0084] The formula for calculating air density is:

[0085] ;

[0086] Among them, the above The first air density is given under the conditions of a first air temperature and a first air pressure; the above The first air pressure at the inlet of the steam-water separator; the above The first air temperature at the inlet of the steam-water separator; the above The first relative humidity of the air at the inlet of the steam-water separator; the above The first saturated water vapor partial pressure at the inlet of the steam-water separator.

[0087] S43: Determine the second saturated water vapor partial pressure at the outlet of the air dryer heater based on the second air temperature;

[0088] The measured temperature of the humid air at the outlet of the air dryer is imported into the formula for calculating the saturated water vapor partial pressure. The saturated water vapor partial pressure in the humid air at the outlet of the air dryer is calculated and denoted as the second saturated water vapor partial pressure.

[0089] The formula for calculating the partial pressure of saturated water vapor is:

[0090] ;

[0091] Among them, the above The second saturated water vapor partial pressure at the outlet of the air dryer heater; the above The second air temperature is the outlet temperature of the air dryer heater; A, B, C, and D are constants.

[0092] S44: Determine the second air density under the conditions of second air temperature and second air pressure based on the second air temperature, second air pressure, second air relative humidity, and second saturated water vapor partial pressure;

[0093] The measured total pressure, temperature, and relative humidity of the humid air at the outlet of the air dryer heater are imported into the air density calculation formula to calculate the air density under the second air temperature and second air pressure conditions, which is denoted as the second air density.

[0094] The formula for calculating air density is:

[0095] ;

[0096] Among them, the above The second air density is defined under the conditions of the second air temperature and the second air pressure. The second air pressure at the outlet of the air drying heater; the above The second air temperature at the outlet of the air dryer heater; the above The second relative humidity of the air at the outlet of the air dryer heater; the above This is the second saturated water vapor partial pressure at the outlet of the air dryer heater.

[0097] S45: Determine the droplet mass ratio at the outlet of the steam-water separator based on the absolute humidity of water vapor at the outlet of the air dryer heater, the second air pressure, the second air temperature, the second air relative humidity, and the second air density;

[0098] The air-to-liquid-droplet mass ratio at the outlet of a steam-water separator refers to the ratio of the mass of droplets in the air exiting the separator to the total mass of the outlet air. This parameter is crucial for measuring steam-water separation efficiency. Since the mass of droplets in the air exiting the steam-water separator cannot be directly measured, the experimental data acquisition system of this application utilizes an air drying heater to evaporate the droplets in the air exiting the steam-water separator into water vapor. Then, by calculating the humidity of the steam under hot conditions, the droplet mass ratio of the air exiting the steam-water separator can be obtained. Specifically, the measured humid air temperature, humid air pressure, and humid air relative humidity at the outlet of the air drying heater, combined with the calculated absolute humidity occupied by the water vapor generated after the evaporation of water droplets entrained in the air at the outlet of the air drying heater, and the saturated water vapor partial pressure in the humid air at the outlet of the air drying heater, are input into the droplet mass ratio calculation formula to obtain the droplet mass ratio of the air exiting the steam-water separator.

[0099] The formula for calculating the droplet mass ratio is:

[0100] ;

[0101] Among them, the above The mass ratio of droplets at the outlet of the steam-water separator; the above The absolute humidity of water vapor at the outlet of the air dryer heater; the above The second air pressure at the outlet of the air drying heater; the above The second air temperature at the outlet of the air dryer heater; the above The second relative humidity of the air at the outlet of the air dryer heater; the above This is the second saturated water vapor partial pressure at the outlet of the air dryer heater.

[0102] S46: Obtain the air volume flow rate and water mass flow rate at the inlet of the steam-water separator;

[0103] The test data acquisition system for the steam-water separator also includes a first flow meter and a second flow meter. The first flow meter is installed on the first pipeline to monitor the air volumetric flow rate in real time; the second flow meter is installed on the second pipeline to monitor the water mass flow rate in real time. During the test, the first flow meter measures the original compressed air volumetric flow rate at the current test operating point, and the second flow meter measures the water mass flow rate at the current test operating point.

[0104] S47: Determine the air moisture content at the outlet of the steam-water separator based on air volume flow rate, first air density, and droplet mass ratio;

[0105] The measured air volume flow rate of the original compressed air at the inlet of the steam-water separator, along with the calculated total pressure of the humid air at the inlet of the steam-water separator, the air density under the humid air temperature conditions, and the droplet mass ratio of the air at the outlet of the steam-water separator, are imported into the formula for calculating the water content of the air at the outlet of the steam-water separator.

[0106] The formula for calculating air moisture content is:

[0107] ;

[0108] Among them, the above The moisture content of the air at the outlet of the steam-water separator; the above The air volumetric flow rate at the inlet of the steam-water separator; the above The first air density; the above This refers to the mass ratio of liquid droplets at the outlet of the steam-water separator.

[0109] S48: Determine the separation efficiency of the steam-water separator based on water mass flow rate and air moisture content.

[0110] The measured inlet water mass flow rate of the steam-water separator and the calculated moisture content of the outlet air of the steam-water separator are imported into the separation efficiency calculation formula to calculate the separation efficiency of the steam-water separator at the current test operating point.

[0111] The formula for calculating separation efficiency is:

[0112] ;

[0113] Among them, the above The separation efficiency of the steam-water separator; the above The mass ratio of droplets at the outlet of the steam-water separator; the above This refers to the water mass flow rate at the inlet of the steam-water separator.

[0114] As can be seen, in the above scheme, the outlet air of the steam-water separator is dried and heated by an air drying heater. The water contained in the outlet air is converted into water vapor by heating. The air humidity is measured by an air humidity meter, and then the air humidity is converted into air water content by calculation. The separation efficiency is then calculated, so that all performance test data are calculated based on directly measurable gaseous water vapor. This enables real-time monitoring and measurement of the test data of the steam-water separator, overcoming the shortcomings of related technologies, such as the inability to monitor test data in real time, complex operation, and long test cycle.

[0115] In one embodiment, a test data acquisition device for a steam-water separator is provided, which corresponds one-to-one with the test data acquisition method for the steam-water separator described in the above embodiments. For example... Figure 5 As shown, the test data acquisition device 100 for the steam-water separator includes: a control module 101, a first determination module 102, and a second determination module 103. Detailed descriptions of each functional module are as follows:

[0116] The control module 101 is used to respond to the test data acquisition request of the steam-water separator, start the steam-water separator, and input a steam-water mixture into the steam-water separator, wherein the steam-water mixture is a mixture of air and water;

[0117] The control module 101 is also used to start the air drying heater and dry the moisture in the air output from the steam-water separator.

[0118] The first determining module 102 is used to determine the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater based on the first air parameters at the inlet of the steam-water separator and the second air parameters at the outlet of the air dryer heater device. The air parameters include relative humidity, air temperature and air pressure.

[0119] The second determining module 103 is used to determine the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity of water vapor at the outlet of the air dryer heater, the absolute humidity of water vapor, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator.

[0120] In one embodiment, the first determining module 102 is specifically used for:

[0121] Obtain the first relative humidity, first air temperature, and first air pressure at the inlet of the air-water separator;

[0122] The relative humidity, temperature, and pressure of the second air at the outlet of the air dryer heater are obtained.

[0123] Based on the first air pressure, the second air pressure, the first relative humidity, the first air temperature, and the second air temperature, determine the converted value of the air humidity at the outlet of the air drying heater.

[0124] Based on the second relative humidity of the air at the outlet of the air dryer and the converted value of the air humidity of the air dryer, the relative humidity of water vapor at the outlet of the air dryer is determined, and the relative humidity occupied by water vapor generated after the evaporation of water droplets entrained in the air is determined.

[0125] Obtain the absolute humidity of the air at the outlet of the air dryer heater;

[0126] Based on the second relative humidity of the air, the relative humidity occupied by water vapor generated after the evaporation of water droplets entrained in the air at the outlet of the air dryer, and the absolute humidity of the air, the absolute humidity occupied by water vapor generated after the evaporation of water droplets entrained in the air at the outlet of the air dryer is determined.

[0127] In one embodiment, the second determining module 103 is specifically used for:

[0128] Based on the first air temperature, determine the first saturated water vapor partial pressure at the inlet of the steam-water separator;

[0129] Based on the first air temperature, first air pressure, first air relative humidity, and first saturated water vapor partial pressure, determine the first air density under the first air temperature and first air pressure conditions;

[0130] Based on the second air temperature, determine the second saturated water vapor partial pressure at the outlet of the air drying heater;

[0131] Based on the second air temperature, second air pressure, second air relative humidity, and second saturated water vapor partial pressure, determine the second air density under the conditions of the second air temperature and second air pressure.

[0132] The droplet mass ratio at the outlet of the steam-water separator is determined based on the absolute humidity of water vapor at the outlet of the air dryer heater, the second air pressure, the second air temperature, the second air relative humidity, and the second air density.

[0133] Obtain the air volume flow rate and water mass flow rate at the inlet of the steam-water separator;

[0134] The air moisture content at the outlet of the steam-water separator is determined based on the air volumetric flow rate, the first air density, and the air-to-liquid droplet mass ratio; steam-water separator

[0135] The separation efficiency of the steam-water separator is determined based on the water mass flow rate and air moisture content.

[0136] In one embodiment, the control module 101 is further configured to control the operation of the air drying heater based on a preset heating power.

[0137] In one embodiment, the device further includes:

[0138] The first acquisition module is used to acquire the dew point temperature at the outlet of the air dryer when the air dryer is running stably.

[0139] The second acquisition module is used to acquire the difference between the second air temperature and the dew point temperature;

[0140] The comparison module is used to compare the difference between the second air temperature and the dew point temperature with a preset temperature margin to determine whether the difference between the second air temperature and the dew point temperature is less than the preset temperature margin.

[0141] In one embodiment, the control module 101 is further configured to adjust the heating power of the air dryer heater according to a preset power boost value if the difference between the second air temperature and the dew point temperature is less than a preset temperature margin.

[0142] In one embodiment, the control module 101 is further configured to determine, according to a preset time interval, whether the difference between the second air temperature and the dew point temperature is less than a preset temperature margin; if the difference between the second air temperature and the dew point temperature is less than the preset temperature margin, adjust the heating power of the air drying heater according to a preset power boost value until the difference between the second air temperature and the dew point temperature is greater than or equal to the preset temperature margin.

[0143] This invention provides a test data acquisition device 100 for a steam-water separator. It uses an air drying heater to dry and heat the outlet air of the steam-water separator, converting the water contained in the outlet air into water vapor through heating. The air humidity is measured using an air humidity meter, and then the air humidity is converted into air water content through calculation, thereby calculating the separation efficiency. This allows all performance test data to be calculated based on directly measurable gaseous water vapor, thus realizing real-time monitoring and measurement of test data for the steam-water separator. This overcomes the shortcomings of related technologies, such as the inability to monitor test data in real time, complex operation, and long test cycles.

[0144] Specific limitations regarding the data acquisition device for the steam-water separator can be found in the above description of the data acquisition method for the steam-water separator, and will not be repeated here. Each module in the aforementioned data acquisition device for the steam-water separator can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0145] In one embodiment, such as Figure 6 As shown, a test data acquisition system for a steam-water separator is provided, comprising: a steam-water separator for separating steam and water; and an air drying heater for drying and heating the moisture in the air separated by the steam-water separator, wherein the input end of the air drying heater is connected to the output end of the steam-water separator.

[0146] The steam generator is a crucial piece of equipment in a nuclear reactor system, playing a vital role in reactor operation. The quality of the steam it provides directly affects the safe operation and energy conversion efficiency of the nuclear power plant. Besides the operating parameters of the steam generator itself (temperature and pressure), the humidity of the steam entering the turbine unit is also a critical parameter for steam quality. Strict requirements are placed on steam humidity in the reactor system. If the humidity of the steam supplied by the steam generator is too high, it may cause salt accumulation in the turbine's flow path, reducing turbine efficiency and affecting the safe and reliable operation of the turbine unit. To effectively control the steam humidity at the steam generator outlet, the steam generator is equipped with multi-stage steam-water separators. Due to the complexity of its structure and internal flow, the development of new steam-water separators usually requires experimental research to verify their performance. Currently, experimental research on new steam-water separators mainly consists of two steps: the first step is to determine the structure with optimal separation performance through cold screening tests; the second step is to verify the performance of the selected steam-water separator through hot testing. In cold-state screening tests, air-water is typically used as the working fluid. Since air is a non-condensable gas, measuring the air moisture content during the test is a key focus of cold-state screening. Related technologies for measuring air moisture content in cold-state screening tests mainly include air washing and sampling-weighing methods, but these methods have significant drawbacks: they are all offline methods, unable to achieve real-time monitoring and measurement of air moisture content during the test; furthermore, under the low moisture content conditions of the secondary steam-water separator, the moisture content measurement time can exceed one hour, resulting in a long overall test time; and a dedicated measurement calibration test is required during the test, and the measurement system needs to be turned on and off at specific times, making the entire moisture content measurement system operation procedure complex. Based on the above technical problems, this application proposes to connect an air drying heater to the steam-water separator, using the air drying heater to dry and heat the water droplets entrained in the outlet air of the steam-water separator, evaporating the liquid moisture into gaseous water vapor. This allows for online monitoring and measurement of the air moisture content and separation efficiency of the steam-water separator outlet air. By combining a vapor-water separator and an air drying heater, liquid moisture that cannot be directly measured is converted into gaseous moisture that can be directly measured. This enables online monitoring and measurement of air moisture content and separation efficiency over a wide range, while simplifying the system process and equipment. As a result, the system is easy to operate and has low construction and daily maintenance costs.

[0147] In one embodiment, the system further includes: a water-air mixer for mixing water and air to form a water-air mixture, wherein the output end of the water-air mixer is connected to the input end of a water-air separator; a first pipe for injecting air into the water-air separator, wherein the output end of the first pipe is connected to the input end of the water-air mixer; and a second pipe for injecting water into the water-air separator, wherein the output end of the second pipe is connected to the input end of the water-air mixer.

[0148] Alternatively, the soft drink mixer can be a mixer or an atomizer.

[0149] In practical applications, in response to a request to acquire test data from the steam-water separator, the separator is activated. Raw compressed air is continuously injected into the separator through the first pipe, while water is continuously injected through the second pipe. A steam-water mixer is used to mix the injected raw compressed air and water, and the resulting mixture is then transported to the steam-water separator. During this transport process, the air and water flow rates are controlled within a certain range to ensure the steam-water mixture flows evenly into the separator, meeting the test conditions for the steam-water separator.

[0150] In one embodiment, the system further includes: a first flow meter installed in the first pipe for measuring air volumetric flow rate; a second flow meter installed in the second pipe for measuring water mass flow rate; a first air humidity meter installed in the first pipe for measuring the relative humidity of the air at the inlet of the steam-water separator; a second air humidity meter installed at the outlet of the air drying heater for measuring the relative humidity and absolute humidity of the air at the outlet of the air drying heater; a first pressure sensor installed in the first pipe for measuring the air pressure at the inlet of the steam-water separator; a second pressure sensor installed at the outlet of the air drying heater for measuring the air pressure at the outlet of the air drying heater; a first temperature sensor installed in the first pipe for measuring the air temperature at the inlet of the steam-water separator; and a second temperature sensor installed at the outlet of the air drying heater for measuring the air temperature at the outlet of the air drying heater. Using the above components, air parameters such as temperature, pressure, and relative humidity are measured as key parameters for calculating the water content and separation efficiency of the air at the outlet of the steam-water separator, enabling online monitoring and measurement of the water content and separation efficiency of the steam-water separator at different operating conditions.

[0151] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to perform the following steps:

[0152] In response to a request to acquire test data from the steam-water separator, the steam-water separator is started and a steam-water mixture is input into it, wherein the steam-water mixture is a mixture of air and water;

[0153] Start the air drying heater to dry and heat the moisture in the air output from the air-water separator;

[0154] Based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air drying heater, the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater are determined. The air parameters include relative humidity, air temperature and air pressure.

[0155] Based on the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator, the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator are determined.

[0156] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0157] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for acquiring test data of a steam-water separator, characterized in that, A test data acquisition system using a steam-water separator, comprising a steam-water separator, an air drying heater, and a steam-water mixer, wherein the steam-water separator is used to separate steam and water, the air drying heater is used to dry and heat the moisture in the air separated by the steam-water separator, and the steam-water mixer is used to mix water and air to form a steam-water mixture, the input end of the air drying heater is connected to the output end of the steam-water separator, and the output end of the steam-water mixer is connected to the input end of the steam-water separator, the method comprising: In response to a request to acquire test data from the steam-water separator, the steam-water separator is started, and a steam-water mixture is input into the steam-water separator, wherein the steam-water mixture is a mixture of air and water; Start the air drying heater to dry and heat the moisture in the air output from the air-water separator; Based on the first air parameter at the inlet of the steam-water mixer and the second air parameter at the outlet of the air drying heater, the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater are determined, wherein the air parameters include relative humidity, air temperature and air pressure; Based on the relative humidity of water vapor at the outlet of the air dryer heater, the absolute humidity of water vapor, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator, the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator are determined. The step of determining the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air dryer heater specifically includes: The first relative humidity, first air temperature, and first air pressure at the inlet of the air-water separator are obtained; The second relative humidity, second air temperature, and second air pressure at the outlet of the air drying heater are obtained; Based on the first air pressure, the second air pressure, the first relative humidity, the first air temperature, and the second air temperature, determine the converted value of the air humidity at the outlet of the air drying heater; The formula for calculating the conversion value of air humidity is: ； in, This is the converted value of the air humidity at the outlet of the air dryer heater; The second air pressure at the outlet of the air drying heater; The first air pressure at the inlet of the steam-water separator; The first relative humidity of the air at the inlet of the steam-water separator; The first air temperature at the inlet of the steam-water separator; The second air temperature at the outlet of the air dryer heater; A, B, C, and D are constants; The relative humidity of water vapor at the outlet of the air dryer heater is determined based on the second relative humidity of the air at the outlet of the air dryer heater and the converted value of the air humidity at the outlet of the air dryer heater. Obtain the absolute humidity of the air at the outlet of the air dryer heater; The absolute humidity of water vapor at the outlet of the air dryer is determined based on the second relative humidity of the air, the relative humidity of water vapor at the outlet of the air dryer heater, and the absolute humidity of the air. The step of determining the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity of water vapor at the outlet of the air dryer heater, the absolute humidity of water vapor, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator specifically includes: The first saturated water vapor partial pressure at the inlet of the steam-water separator is determined based on the first air temperature. Based on the first air temperature, the first air pressure, the first air relative humidity, and the first saturated water vapor partial pressure, determine the first air density under the first air temperature and the first air pressure conditions; The second saturated water vapor partial pressure at the outlet of the air drying heater is determined based on the second air temperature. Based on the second air temperature, second air pressure, second air relative humidity, and second saturated water vapor partial pressure, determine the second air density under the conditions of the second air temperature and second air pressure; Based on the absolute humidity of water vapor at the outlet of the air dryer heater, the second air pressure, the second air temperature, the second air relative humidity, and the second air density, the droplet mass ratio at the outlet of the steam-water separator is determined, wherein the droplet mass ratio is the mass proportion of the residual droplets that have not been separated after passing through the steam-water separator in the outlet humid air. The formula for calculating the droplet mass ratio is: ； in, The mass ratio of liquid droplets at the outlet of the steam-water separator; The absolute humidity of water vapor at the outlet of the air dryer heater; The second air pressure at the outlet of the air drying heater; The second air temperature at the outlet of the air drying heater; The second relative humidity of the air at the outlet of the air dryer heater; The second saturated water vapor partial pressure at the outlet of the air dryer heater; Obtain the air volume flow rate and water mass flow rate at the inlet of the steam-water separator; The air moisture content at the outlet of the steam-water separator is determined based on the air volume flow rate, the first air density, and the droplet mass ratio. The separation efficiency of the steam-water separator is determined based on the water mass flow rate and the air moisture content.

2. The method according to claim 1, characterized in that, After starting the drying and heating device, the process also includes: The air drying heater is controlled based on a preset heating power. When the air dryer heater is operating stably, the dew point temperature at the outlet of the air dryer heater is obtained. Obtain the difference between the second air temperature and the dew point temperature; If the difference between the second air temperature and the dew point temperature is less than the preset temperature margin, the heating power of the air drying heater is adjusted according to the preset power boost value. According to a preset time interval, it is determined whether the difference between the second air temperature and the dew point temperature is less than the preset temperature margin. If the difference between the second air temperature and the dew point temperature is less than the preset temperature margin, the heating power of the air drying heater is adjusted according to the preset power increase value until the difference between the second air temperature and the dew point temperature is greater than or equal to the preset temperature margin.

3. An apparatus for acquiring test data of the steam-water separator as described in claim 1, characterized in that, The device includes a steam-water separator, an air drying heater, and a steam-water mixer. The steam-water separator separates steam and water. The air drying heater dries and heats the moisture in the air separated by the steam-water separator. The steam-water mixer mixes water and air to form a steam-water mixture. The input end of the air drying heater is connected to the output end of the steam-water separator, and the output end of the steam-water mixer is connected to the input end of the steam-water separator. The device includes: The control module is used to respond to a test data acquisition request from the steam-water separator, start the steam-water separator, and input a steam-water mixture into the steam-water separator, wherein the steam-water mixture is a mixture of air and water; The control module is also used to start the air drying heater and dry the moisture in the air output from the steam-water separator through the air drying heater; The first determining module is used to determine the relative humidity and absolute humidity of water vapor at the outlet of the air dryer heater based on the first air parameter at the inlet of the steam-water separator and the second air parameter at the outlet of the air dryer heater device, wherein the air parameters include relative humidity, air temperature and air pressure; The second determining module is used to determine the air moisture content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity of water vapor at the outlet of the air dryer heater, the absolute humidity of water vapor, the second air parameter, and the water mass flow rate at the inlet of the steam-water separator.

4. The apparatus according to claim 3, characterized in that, Also includes: A first pipe is used to inject air into the steam-water separator, wherein the output end of the first pipe is connected to the input end of the steam-water mixer; The second pipe is used to inject water into the steam-water separator, and the output end of the second pipe is connected to the input end of the steam-water mixer.

5. The apparatus according to claim 4, characterized in that, Also includes: A first flow meter is installed in the first pipe to measure the volumetric flow rate of air. The second flow meter is installed in the second pipe and is used to measure the water mass flow rate; A first air humidity measuring instrument is installed in the first pipeline to measure the relative humidity of the air at the inlet of the steam-water separator; The second air humidity measuring instrument is installed at the outlet of the air drying heater and is used to measure the relative humidity and absolute humidity of the air at the outlet of the air drying heating device. A first pressure sensor is installed in the first pipe to measure the air pressure at the inlet of the steam-water separator. The second pressure sensor is located at the outlet of the air dryer heater and is used to measure the air pressure at the outlet of the air dryer heater. A first temperature sensor is installed in the first pipe to measure the air temperature at the inlet of the steam-water separator. The second temperature sensor is located at the outlet of the air dryer heater and is used to measure the air temperature at the outlet of the air dryer heater.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the test data acquisition method for the steam-water separator as described in claim 1 or 2.

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