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

Abstract

The invention relates to the technical field of steam-water separator testing, and discloses a method, a device, a system and equipment for acquiring test data of a steam-water separator, and the method comprises the steps: starting the steam-water separator, and inputting a steam-water mixture into the steam-water separator; an air drying heater is started, and moisture in air output by the steam-water separator is dried and heated through the air drying 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 drying heater device, the relative humidity and absolute humidity of water vapor at the outlet of the air drying heater device are determined; and determining the air water content at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the water vapor relative humidity at the outlet of the air drying heater, the water vapor absolute humidity, the second air parameter and the water mass flow at the inlet of the steam-water separator. The online monitoring and measurement of the outlet air water content and the separation efficiency of the steam-water separator are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of steam-water separation device testing, and in particular to a method, device, system and equipment for acquiring test data of a steam-water separator. Background Art

[0002] High-quality steam is one of the important conditions for ensuring the safe and economical operation of nuclear power plants. As a key part of the steam generator, the main equipment of nuclear power plants, the steam-water separator is used to separate the steam-water mixture in the steam generator into two phases. Due to the complexity of the structure and internal flow of the steam-water separator, it is necessary to conduct verification tests on its separation performance during the development of the steam-water separator.

[0003] At present, in the cold screening test of the steam-water separator, the air washing method and the sampling weighing method are mainly used to obtain the air moisture content of the steam-water separator outlet air and the separation efficiency of the steam-water separator, and the air moisture content and separation efficiency are used as separation test data. However, both methods are offline measurement methods, which cannot monitor and measure the separation efficiency of the steam-water separator and the air moisture content in real time, resulting in serious lag in test data, affecting the test cycle and test efficiency. Summary of the invention

[0004] The present invention provides a method, device, system and equipment for acquiring test data of a steam-water separator, so as to solve the technical problem that an off-line measurement method cannot monitor and measure the separation efficiency of the steam-water separator and the water content of air in real time, resulting in serious lag of 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, which is applied to a test data acquisition system of a steam-water separator, wherein the performance test system of the steam-water separator includes a steam-water separator and an air drying heater, and the method includes:

[0006] In response to a test data acquisition request of 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;

[0007] The air drying heater is started to dry and heat the moisture in the air output by the steam-water separator through the air drying heater;

[0008] Determine the water vapor relative humidity and water vapor absolute humidity at the outlet of the air drying 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 drying heater device, wherein the air parameters include air relative humidity, air temperature and air pressure;

[0009] The water content of air at the outlet of the water separator and the separation efficiency of the water separator are determined based on the relative humidity of water vapor at the outlet of the air drying heater, the absolute humidity of water vapor, the second air parameter and the water mass flow rate at the inlet of the water separator.

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

[0011] A control module, for starting the steam-water separator in response to a test data acquisition request of the steam-water separator, and inputting 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 to dry and heat the moisture in the air output by the steam-water separator through the air drying heater;

[0013] A first determination module is used to determine the water vapor relative humidity and the water vapor absolute humidity at the outlet of the air drying 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 drying heater device, wherein the air parameters include air relative humidity, air temperature and air pressure;

[0014] The second determination module is used to determine the water content of air 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 drying 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 the present application, a test data acquisition system for a steam-water separator is provided, comprising:

[0016] A steam-water separator, used for separating steam and water;

[0017] The air drying heater is used to dry and heat 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.

[0018] According to the fourth aspect of the present application, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the test data acquisition method for the above-mentioned steam-water separator are implemented.

[0019] In the scheme implemented by the test data acquisition method, device, system and equipment of the above-mentioned steam-water separator, an air drying heater is used to dry and heat the outlet air of the steam-water separator, and the water contained in the outlet air is converted into water vapor by heating. The air humidity is measured by an air humidity measuring instrument, and then the air humidity is converted into air water content by calculation, and then the separation efficiency is calculated, so that all performance test data are calculated based on directly measurable gaseous water vapor, thereby realizing real-time monitoring and measurement of the test data of the steam-water separator, overcoming the shortcomings of the related technology that the test data of the steam-water separator cannot be monitored in real time, the operation is complicated, and the test cycle is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

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

[0022] Figure 2 yes Figure 1 A schematic flow chart of a specific implementation of step S20;

[0023] Figure 3 yes Figure 1 A schematic flow chart of a specific implementation of step S30;

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

[0025] Figure 5 is a structural schematic diagram of a test data acquisition device for a steam-water separator in one embodiment of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a test data acquisition system for a steam-water separator in one embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 As shown, Figure 1 A flow chart of a method for acquiring test data of a steam-water separator provided in an embodiment of the present invention comprises the following steps:

[0029] S10: in response to a test data acquisition request of the steam-water separator, starting the steam-water separator and inputting a steam-water mixture into the steam-water separator;

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

[0031] The test data acquisition method for the steam-water separator provided by the present invention can be applied to the cold screening test scenario of the steam generator steam-water separator. During the development process of the steam-water separator or before operation, the test data acquisition system of the steam-water separator is used to acquire the test data of the steam-water separator for testing and assessing the steam-water separator. Specifically, the test data acquisition system of the steam-water separator includes a steam-water separator and an air drying heater, wherein 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-water mixture into two phases, and the air drying heater is used to evaporate the water entrained in the air output by the steam-water separator into water vapor.

[0032] During the test assessment, in response to the test data acquisition instruction for the steam-water separator, the steam-water separator is started, and the original compressed air and water from the outside are transported into the system for mixing. After the steam-water mixture that meets the test requirements is produced, it flows into the steam-water separator, so that the steam-water separator separates the steam-water mixture 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, wherein the steam-water mixer is used to mix water and original 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 actual application scenarios, in response to a test data acquisition request of a steam-water separator, the steam-water separator is started, and original compressed air is continuously injected into the steam-water separator through the first pipeline, and water is continuously injected into the steam-water separator through the second pipeline. The injected original compressed air and water are mixed by a steam-water mixer, and the mixed steam-water mixture is transported to the steam-water separator. During the transportation process, the air flow rate and the water flow rate are controlled within a certain range to ensure that the steam-water mixture is mixed evenly and flows into the steam-water separator to meet the test conditions of the steam-water separator.

[0035] S20: starting the air drying heater to dry and heat the moisture in the air output by the steam-water separator;

[0036] During the test of the steam-water separator, the water content in the air separated by the steam-water separator has always been the key parameter of the test assessment. Since the water content of the air cannot be measured directly by an instrument, in the related technology, the air washing method or the sampling weighing method is usually used to measure the water content of the separated air. However, the above measurement methods are all offline measurement methods. Special measurement calibration tests need to be carried out during the test, and the system needs to be turned on and off at specific times, resulting in a complicated operation procedure for the entire water content measurement. In addition, under the low water content working condition of the secondary steam-water separator, the water content measurement time is long, which will also lead to low efficiency of the entire performance test. Based on the above problems, the present application proposes to use an air drying heater to connect with the output end of the steam-water separator, and convert the water contained in the air at the outlet of the steam-water separator into water vapor by heating. This can use an air humidity measuring instrument to measure the gaseous water vapor data, and then convert it into air water content data, so as to achieve online measurement of air water content.

[0037] Specifically, during the test, when the steam-water separator is running stably, the air drying heater is started, and the outlet air of the steam-water separator is transported to the air drying heater. The water droplets entrained in the outlet air are dried and heated by the air drying heater to evaporate the moisture 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] Through the above method, the air drying heater is used to convert the water droplets entrained in the air into water vapor, so that the test data acquisition data of the steam-water separator are all calculated based on gaseous water vapor, which simplifies the data processing process, avoids the complexity brought by liquid data processing, and makes the calculation more direct and simple.

[0039] In one embodiment of the present 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: Controlling the operation of the air drying heater based on the preset heating power;

[0041] S22: when the air drying heater operates stably, obtaining the dew point temperature at the outlet of the air drying heater;

[0042] S23: Obtaining a 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 to determine whether the difference between the second air temperature and the dew point temperature is less than the preset temperature margin. If so, proceed to step S25; if not, proceed to step S27;

[0044] S25: adjusting the heating power of the air drying heater according to the preset power increase value;

[0045] S26: determining whether the difference between the second air temperature and the dew point temperature is less than a preset temperature margin at a preset time interval; if the difference between the second air temperature and the dew point temperature is less than the preset temperature margin, adjusting the heating power of the air drying heater according to a 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: There is no need to adjust the heating power of the air drying heater.

[0047] For steps S21-S27, during the evaluation process, when the air flow rate and water flow rate are monitored to be stable, the air drying heater is started, the air drying heater is controlled to operate according to the preset heating power, and the outlet temperature T1 and the dew point temperature T2 of the air drying heater are monitored in real time. c When the air drying heater is running 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, keep the heating power of the air drying heater unchanged; if T1-T c <ΔT, at this time, the heating power W of the air drying heater is increased according to the preset power ΔW (for example, 5%W). After the increase, at the preset time interval (for example, 1 minute), the difference between the outlet temperature and the dew point temperature is compared with the preset temperature margin again. If T1-Tc<ΔT, the preset power is continued to be increased until T1-Tc≥ΔT.

[0048] Through the above method, the heating power of the air drying heater is automatically adjusted according to the difference between the outlet temperature of the air drying heater and the dew point temperature, so as to realize automatic adjustment of the heating power and sufficient evaporation of the water content in the air under different test conditions, thereby realizing wide-range and accurate measurement of the water content.

[0049] S30: Determine the relative humidity and absolute humidity of water vapor at the outlet of the air drying 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 drying heater device;

[0050] Among them, air parameters include air relative humidity, air temperature and air pressure;

[0051] The first air parameter is a parameter of the original compressed air to be transported at the inlet of the steam-water separator. The original compressed air can be air sampled from the external environment, and the air usually contains a small amount of moisture. Before the steam and water are mixed, the first air parameters of the original compressed air transported 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 converting water droplets entrained in the air at the outlet of the steam-water separator into water vapor using an air drying heater, the air containing the water vapor is discharged, and the second air parameters of the outlet air are measured at the outlet of the air drying heater, wherein the second air parameters include a second air relative humidity, a second air temperature and a second air pressure.

[0053] After measuring the first air parameter and the second air parameter, the absolute humidity of water vapor and the relative humidity of water vapor in the air at the outlet of the air drying heater are calculated using the first air parameter and the second air parameter, wherein the absolute humidity of water vapor refers to the absolute humidity of water vapor generated after the evaporation of water droplets entrained in the air at the outlet of the air drying heater, and the relative humidity of water vapor refers to the relative humidity of water vapor generated after the evaporation of water droplets entrained in the air at the outlet of the air drying heater.

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

[0055] In one embodiment of the present application, a solution 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 device, 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, and specifically include the following steps S31-S36:

[0056] S31: Obtaining a first air relative humidity, a first air temperature, and a first air pressure at an inlet of a steam-water separator;

[0057] S32: Obtaining a second air relative humidity, a second air temperature, and a second air pressure at an outlet of the air drying heater;

[0058] For steps S31-S32, the test data acquisition system of the steam-water separator also includes a first temperature sensor, a first pressure sensor and a first air humidity measuring instrument, wherein the first temperature sensor, the first pressure sensor and the first air humidity measuring instrument are arranged on the first pipeline, and are used to measure the total pressure of wet air, the temperature of wet air and the relative humidity of wet air of the original compressed air delivered to the steam-water separator, which are respectively recorded as the first air pressure, the first air temperature and the first air relative humidity. Further, the test data acquisition system of the steam-water separator also includes a second temperature sensor, a second pressure sensor and a second air humidity measuring instrument, wherein the second temperature sensor, the second pressure sensor and the second air humidity measuring instrument are arranged on the air exhaust pipe at the outlet of the air drying heater, and are used to measure the total pressure of wet air, the temperature of wet air and the relative humidity of wet air at the outlet of the air drying heater, which are respectively recorded as the second air pressure, the second air temperature and the second air relative humidity.

[0059] By the above method, the temperature, pressure and relative humidity are measured as key parameters for calculating the water content of the air at the outlet of the steam-water separator and the separation efficiency, so as to realize the online measurement of the water content of the air at the outlet of the steam-water separator and the separation efficiency.

[0060] S33: determining an air humidity conversion value at an outlet of the air drying heater based on the first air pressure, the second air pressure, the first air relative humidity, the first air temperature, and the second air temperature;

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

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

[0063]

[0064] Among them, the above H 0-1is the converted value of the air humidity at the outlet of the air drying heater; the above-mentioned P1 is the second air pressure at the outlet of the air drying heater; the above-mentioned P0 is the first air pressure at the inlet of the steam-water separator; the above-mentioned H0 is the first air relative humidity at the inlet of the steam-water separator; the above-mentioned T0 is the first air temperature at the inlet of the steam-water separator; the above-mentioned T1 is the second air temperature at the outlet of the air drying heater; the above-mentioned A, B, C, and D are constants, A=1.2811805×10-5, B=1.9509874×10-2, C=34.04926034, D=6.353611×103.

[0065] S34: determining the water vapor relative humidity at the outlet of the air drying heater based on the second air relative humidity at the outlet of the air drying heater and the air humidity conversion value at the outlet of the air drying heater;

[0066] After calculating the converted value of the air humidity at the outlet of the air drying 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 drying 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 drying heater, and this is recorded as the relative humidity of water vapor.

[0067] S35: Obtaining the absolute humidity of air at the outlet of the air drying heater;

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

[0069] For steps S35-S36, the absolute humidity of the wet air at the outlet of the air drying heater is measured and recorded as the absolute humidity of the air. The relative humidity of the wet air at the outlet of the air drying heater, the absolute humidity of the wet air, and the calculated air humidity conversion value are introduced into the water vapor absolute humidity calculation formula to calculate the absolute humidity occupied by the water vapor generated after the evaporation of the wet air entrained with water droplets at the outlet of the air drying heater, which is recorded as the absolute humidity of the water vapor;

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

[0071]

[0072] Among them, the above a d is the absolute humidity of water vapor at the outlet of the air drying heater; H1 is the relative humidity of the second air at the outlet of the air drying heater; H 0-1 is the converted value of air humidity at the outlet of the air drying heater; the above a1 is the absolute humidity of air at the outlet of the air drying heater.

[0073] S40: Determine the water content of air at the outlet of the water separator and the separation efficiency of the water separator based on the relative humidity of water vapor at the outlet of the air drying heater, the absolute humidity of water vapor, the second air parameter and the water mass flow rate at the inlet of the water separator.

[0074] After the water droplets entrained in the air separated by the steam-water separator are 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 of the water vapor at the outlet of the air drying heater, the absolute humidity of the water vapor, 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 are used as performance test assessment parameters to evaluate the steam-water separator.

[0076] In one embodiment of the present 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, that is, based on the relative humidity of water vapor at the outlet of the air drying 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 water content of air at the outlet of the steam-water separator and the separation efficiency of the steam-water separator are determined, which specifically includes the following steps S41-S48:

[0077] S41: determining a first saturated water vapor partial pressure at an inlet of a 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 wet air at the steam-water separator inlet. The measured wet air temperature at the steam-water separator inlet is introduced into the saturated water vapor partial pressure calculation formula to calculate the first saturated water vapor partial pressure at the steam-water separator inlet.

[0079] The calculation formula of saturated water vapor partial pressure is:

[0080]

[0081] Among them, the above P s0 is the first saturated water vapor partial pressure at the inlet of the steam-water separator; the above T0 is the first air temperature at the inlet of the steam-water separator; the above A, B, C, and D are constants.

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

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

[0084] The air density calculation formula is:

[0085]

[0086] Wherein, the above ρ0 is the first air density under the conditions of the first air temperature and the first air pressure; the above P0 is the first air pressure at the inlet of the steam-water separator; the above T0 is the first air temperature at the inlet of the steam-water separator; the above H0 is the first air relative humidity at the inlet of the steam-water separator; the above P s0 It is the first saturated water vapor partial pressure at the inlet of the steam-water separator.

[0087] S43: determining a second saturated water vapor partial pressure at an outlet of the air drying heater based on the second air temperature;

[0088] The measured wet air temperature at the outlet of the air drying heater is introduced into the saturated water vapor partial pressure calculation formula to calculate the saturated water vapor partial pressure in the wet air at the outlet of the air drying heater, which is recorded as the second saturated water vapor partial pressure;

[0089] The calculation formula of saturated water vapor partial pressure is:

[0090]

[0091] Among them, the above P s1 is the second saturated water vapor partial pressure at the outlet of the air drying heater; the above T1 is the second air temperature at the outlet of the air drying heater; the above A, B, C, and D are constants.

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

[0093] The measured total pressure, temperature and relative humidity of the wet air at the outlet of the air drying heater are introduced into the air density calculation formula to calculate the air density under the second air temperature and the second air pressure conditions, which is recorded as the second air density;

[0094] The air density calculation formula is:

[0095]

[0096] Wherein, ρ1 is the second air density under the conditions of the second air temperature and the second air pressure; P1 is the second air pressure at the outlet of the air drying heater; T1 is the second air temperature at the outlet of the air drying heater; H1 is the second air relative humidity at the outlet of the air drying heater; P s1 It is the second saturated water vapor partial pressure at the outlet of the air drying heater.

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

[0098] The air droplet mass ratio at the outlet of the steam-water separator refers to the ratio of the mass of the droplets in the air coming out of the steam-water separator outlet to the total outlet air mass. This parameter is an important parameter for measuring the steam-water separation efficiency. The mass of the droplets in the air at the outlet of the steam-water separator cannot be measured directly. The experimental data acquisition system of the present application uses the set air drying heater to evaporate the droplets in the air at the outlet of the steam-water separator into water vapor, and then by calculating the steam humidity in the hot state, the droplet mass ratio of the air at the outlet of the steam-water separator can be obtained. Specifically, the measured wet air temperature, wet air pressure, and wet air relative humidity at the outlet of the air drying heater are combined with the calculated absolute humidity occupied by 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 wet air at the outlet of the air drying heater are introduced into the droplet mass ratio calculation formula to obtain the droplet mass ratio of the air at the outlet of the steam-water separator;

[0099] The droplet mass ratio calculation formula is:

[0100]

[0101] Among them, the above x d is the mass ratio of droplets at the outlet of the steam-water separator; d is the absolute humidity of water vapor at the outlet of the air drying heater; the above P1 is the second air pressure at the outlet of the air drying heater; the above T1 is the second air temperature at the outlet of the air drying heater; the above H1 is the second air relative humidity at the outlet of the air drying heater; the above P s1 It is the second saturated water vapor partial pressure at the outlet of the air drying heater.

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

[0103] The test data acquisition system of the steam-water separator also includes a first flow meter and a second flow meter, wherein the first flow meter is arranged on the first pipeline for real-time monitoring of the air volume flow rate; the second flow meter is arranged on the second pipeline for real-time monitoring of the water mass flow rate. During the test, the air volume flow rate of the original compressed air at the current test operating point is measured by the first flow meter, and the water mass flow rate at the current test operating point is measured by the second flow meter.

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

[0105] The measured air volume flow rate of the original compressed air at the steam-water separator inlet, the calculated total pressure of the wet air at the steam-water separator inlet, the air density under the wet air temperature condition and the droplet mass ratio of the air at the steam-water separator outlet are introduced into the air moisture content calculation formula to calculate the moisture content of the air at the steam-water separator outlet;

[0106] The calculation formula of air moisture content is:

[0107]

[0108] Among them, the above Q d,out is the water content of air at the outlet of the steam-water separator; V0 is the air volume flow rate at the inlet of the steam-water separator; ρ0 is the first air density; x d is the droplet mass ratio at the outlet of the steam-water separator.

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

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

[0111] The calculation formula of separation efficiency is:

[0112]

[0113] Wherein, the above η is the separation efficiency of the steam-water separator; the above Q d,out is the droplet mass ratio at the outlet of the steam-water separator; the above Q1 is the water mass flow rate at the inlet of the steam-water separator.

[0114] It can be seen that 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 measuring instrument, and then the air humidity is converted into air water content by calculation, and then the separation efficiency is calculated, so that all performance test data are calculated based on directly measurable gaseous water vapor, thereby realizing real-time monitoring and measurement of the test data of the steam-water separator, overcoming the shortcomings of the related technology that the test data of the steam-water separator cannot be monitored in real time, the operation is complicated, and the test cycle is long.

[0115] In one embodiment, a test data acquisition device for a steam-water separator is provided, and the test data acquisition device for the steam-water separator corresponds one-to-one to the test data acquisition method for the steam-water separator in the above embodiment. 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. The detailed description of each functional module is as follows:

[0116] The control module 101 is used to start the steam-water separator in response to a test data acquisition request of 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 to dry and heat the moisture in the air output by the steam-water separator through the air drying heater;

[0118] A first determination module 102 is used to determine the water vapor relative humidity and the water vapor absolute humidity at the outlet of the air drying 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 drying heater device, wherein the air parameters include air relative humidity, air temperature and air pressure;

[0119] The second determination module 103 is used to determine the water content of air 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 drying 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 configured to:

[0121] Obtaining a first air relative humidity, a first air temperature, and a first air pressure at an inlet of a steam-water separator;

[0122] Obtaining a second air relative humidity, a second air temperature, and a second air pressure at an outlet of the air drying heater;

[0123] Determining a converted value of air humidity at an outlet of the air drying heater based on the first air pressure, the second air pressure, the first air relative humidity, the first air temperature, and the second air temperature;

[0124] Based on the second air relative humidity at the outlet of the air drying heater and the air humidity conversion value of the air drying heater, determine the water vapor relative humidity at the outlet of the air drying heater, and the relative humidity occupied by the water vapor generated after the water droplets entrained in the air evaporate;

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

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

[0127] In one embodiment, the second determining module 103 is specifically configured to:

[0128] determining a first saturated water vapor partial pressure at an inlet of a steam-water separator based on the first air temperature;

[0129] Determining a first air density under the first air temperature and the first air pressure based on the first air temperature, the first air pressure, the first air relative humidity, and the first saturated water vapor partial pressure;

[0130] determining a second saturated water vapor partial pressure at an outlet of the air drying heater based on the second air temperature;

[0131] Determine a second air density under the second air temperature and the second air pressure based on the second air temperature, the second air pressure, the second air relative humidity, and the second saturated water vapor partial pressure;

[0132] determining a liquid drop mass ratio at an outlet of a steam-water separator based on the absolute humidity of water vapor at an outlet of the air drying heater, a second air pressure, a second air temperature, a second air relative humidity, and a second air density;

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

[0134] Determine the air water content at the outlet of the steam-water separator based on the air volume flow rate, the first air density, and the air-liquid droplet mass ratio;

[0135] Determine the separation efficiency of the water separator based on the water mass flow rate and the water content of the air.

[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 comprises:

[0138] A first acquisition module is used to acquire the dew point temperature at the outlet of the air drying heater when the air drying heater operates stably;

[0139] A second acquisition module, used to obtain a 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 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.

[0141] In one embodiment, the control module 101 is further configured to adjust the heating power of the air drying 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 also used to determine whether the difference between the second air temperature and the dew point temperature is less than a preset temperature margin at a preset time interval; 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 a 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.

[0143] The present invention provides a test data acquisition device 100 for a steam-water separator, which uses an air drying heater to dry and heat the outlet air of the steam-water separator, converts the water contained in the outlet air into water vapor by a heating method, measures the air humidity by an air humidity measuring instrument, and then converts the air humidity into air water content by calculation, and then calculates the separation efficiency, so that all performance test data are calculated based on directly measurable gaseous water vapor, thereby realizing real-time monitoring and measurement of the test data of the steam-water separator, overcoming the shortcomings of the related art that the test data of the steam-water separator cannot be monitored in real time, the operation is complicated, and the test cycle is long.

[0144] The specific definition of the test data acquisition device for the steam-water separator can be found in the definition of the test data acquisition method for the steam-water separator above, which will not be repeated here. Each module in the test data acquisition device for the steam-water separator can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0145] In one embodiment, if 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; 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] Steam generator is an important equipment of nuclear reactor system and plays an important role in reactor operation. The quality of steam provided by it is directly related to the safe operation and energy conversion efficiency of nuclear power plant. In addition to the operating parameters (temperature and pressure) of the steam generator itself, the humidity of steam entering the steam turbine unit is also an important parameter of steam quality. In the reactor system, there are strict requirements for steam humidity. If the steam humidity provided by the steam generator is too high, it may cause salt accumulation in the flow part of the turbine, reduce the efficiency of the turbine, and affect the safe and reliable operation of the turbine unit. In order to effectively control the steam humidity at the outlet of the steam generator, the steam generator is equipped with a multi-stage steam-water separator. Due to the complexity of its structure and internal flow, the development of new steam-water separators usually requires experimental research to verify its performance. At present, the experimental research of new steam-water separators is mainly divided into two steps. The first step is to determine the structure with the best separation performance through cold screening tests, and the second step is to verify the performance of the screened steam-water separation device through hot tests. In the cold screening test, air-water is usually used as the test fluid. Since air is a non-condensable gas, the measurement of air moisture content during the test has always been the focus of the cold screening test. In the related technology, the air moisture content measurement methods for cold screening tests mainly include the air washing method, the sampling weighing method, etc., but these measurement methods have obvious shortcomings: they are all offline measurement methods, and it is impossible to achieve real-time monitoring and measurement of air moisture content during the test; in addition, under the low moisture content working condition of the secondary steam-water separator, the water content measurement time is more than one hour, resulting in a long test time; special measurement calibration tests need to be carried out during the test, and the measurement system needs to be turned on and off at specific times, and the operation procedure of the entire water content measurement system is complicated. Based on the above technical problems, this application proposes to set an air drying heater to be connected to the steam-water separator, and use the air drying heater to dry and heat the water droplets entrained in the outlet air of the steam-water separator to evaporate the liquid water into gaseous water vapor. In order to achieve online monitoring and measurement of the air moisture content and separation efficiency of the outlet air of the steam-water separator. By combining a steam-water separator and an air drying heater, liquid moisture that cannot be directly measured is converted into gaseous moisture that can be directly measured, achieving online monitoring and measurement of a wide range of air moisture content and separation efficiency. At the same time, the system process and equipment are simplified, making the system operation simple, and the construction cost and daily maintenance cost low.

[0147] In one embodiment, the system also includes: a soda-water mixer, used to mix water and air to form a soda-water mixture, wherein the output end of the soda-water mixer is connected to the input end of the soda-water separator; a first pipe, used to inject air into the soda-water separator, wherein the output end of the first pipe is connected to the input end of the soda-water mixer; and a second pipe, used to inject water into the soda-water separator, wherein the output end of the second pipe is connected to the input end of the soda-water mixer.

[0148] Alternatively, the soda mixer may be a mixer or an atomizer.

[0149] In actual application scenarios, in response to a test data acquisition request of a steam-water separator, the steam-water separator is started, and original compressed air is continuously injected into the steam-water separator through the first pipeline, and water is continuously injected into the steam-water separator through the second pipeline. The injected original compressed air and water are mixed by a steam-water mixer, and the mixed steam-water mixture is transported to the steam-water separator. During the transportation process, the air flow rate and the water flow rate are controlled within a certain range to ensure that the steam-water mixture is mixed evenly and flows into the steam-water separator to meet the test conditions of the steam-water separator.

[0150] In one embodiment, the system further comprises: a first flow meter, arranged in the first pipeline, for measuring the air volume flow rate; a second flow meter, arranged in the second pipeline, for measuring the water mass flow rate; a first air humidity measuring instrument, arranged in the first pipeline, for measuring the relative humidity of the air at the inlet of the steam-water separator; a second air humidity measuring instrument, arranged 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 heating device; a first pressure sensor, arranged in the first pipeline, for measuring the air pressure at the inlet of the steam-water separation device; a second pressure sensor, arranged 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, arranged in the first pipeline, for measuring the air temperature at the inlet of the steam-water separation device; a second temperature sensor, arranged at the outlet of the air drying heater, for measuring the air temperature at the outlet of the air drying heater. By using the above components, air parameters such as temperature, pressure and relative humidity are measured as key parameters for calculating the air moisture content and separation efficiency at the outlet of the steam-water separator, so as to realize online monitoring and measurement of the air moisture content and separation efficiency at the test outlet of the steam-water separation device under different working 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 implements the following steps when executing the computer program:

[0152] In response to a test data acquisition request of 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;

[0153] The air drying heater is started to dry and heat the moisture in the air output by the steam-water separator through the air drying heater;

[0154] Determine the water vapor relative humidity and water vapor absolute humidity at the outlet of the air drying 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 drying heater device, wherein the air parameters include air relative humidity, air temperature and air pressure;

[0155] The water content of air at the outlet of the water separator and the separation efficiency of the water separator are determined based on the relative humidity of water vapor at the outlet of the air drying heater, the absolute humidity of water vapor, the second air parameter and the water mass flow rate at the inlet of the water separator.

[0156] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by 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 embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in 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 applied to a steam-water separator, wherein the performance test system of the steam-water separator includes a steam-water separator and an air drying heater, and the method includes: In response to a test data acquisition request of a steam-water separator, starting the steam-water separator and inputting a steam-water mixture into the steam-water separator, wherein the steam-water mixture is a mixture of air and water; Starting the air drying heater to dry and heat the moisture in the air output by the steam-water separator; Determine the water vapor relative humidity and water vapor absolute humidity at the outlet of the air drying 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 drying heater device, wherein the air parameters include air relative humidity, air temperature and air pressure; Based on the relative humidity of the water vapor at the outlet of the air drying heater, the absolute humidity of the water vapor, 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 and the separation efficiency of the steam-water separator are determined.

2. The method according to claim 1, characterized in that The step of determining the relative humidity and absolute humidity of water vapor at the outlet of the air drying 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 drying heater device specifically comprises: Obtaining a first air relative humidity, a first air temperature and a first air pressure at an inlet of the steam-water separator; Obtaining a second air relative humidity, a second air temperature, and a second air pressure at an outlet of the air drying heater; determining a converted value of air humidity at an outlet of the air drying heater based on the first air pressure, the second air pressure, the first air relative humidity, the first air temperature, and the second air temperature; Determining the water vapor relative humidity at the outlet of the air drying heater based on the second air relative humidity at the outlet of the air drying heater and the air humidity conversion value at the outlet of the air drying heater; Obtaining the absolute humidity of air at the outlet of the air drying heater; The absolute humidity of water vapor at the outlet of the air drying heater is determined based on the second air relative humidity, the relative humidity of water vapor at the outlet of the air drying heater, and the absolute humidity of air.

3. The method according to claim 2, characterized in that The step of determining the water content of the air at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity of the water vapor at the outlet of the air drying heater, the absolute humidity of the water vapor, the second air parameter and the water mass flow at the inlet of the steam-water separator specifically comprises: determining a first saturated water vapor partial pressure at an inlet of the steam-water separator based on the first air temperature; Determining a first air density under the first air temperature and the first air pressure based on a first air temperature, a first air pressure, a first air relative humidity, and the first saturated water vapor partial pressure; determining a second saturated water vapor partial pressure at an outlet of the air drying heater based on the second air temperature; Determining a second air density under the second air temperature and the second air pressure based on the second air temperature, the second air pressure, the second air relative humidity, and the second saturated water vapor partial pressure; determining a droplet mass ratio at an outlet of the steam-water separator based on the absolute humidity of water vapor at an outlet of the air drying heater, the second air pressure, the second air temperature, the second air relative humidity, and the second air density; Obtain the air volume flow rate and water mass flow rate at the steam-water separator inlet; determining the water content of air at the outlet of the steam-water separator based on the air volume flow rate, the first air density, and the droplet mass ratio; The separation efficiency of the water separator is determined based on the water mass flow rate and the air water content.

4. The method according to any one of claims 1 to 3, characterized in that After starting the drying and heating device, the method further comprises: Controlling the operation of the air drying heater based on a preset heating power; When the air drying heater operates stably, obtaining the dew point temperature at the outlet of the air drying heater; obtaining a 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 a preset temperature margin, adjusting the heating power of the air drying heater according to a preset power increase value; 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.

5. A test data acquisition device for a steam-water separator, characterized in that: A test data acquisition system applied to a steam-water separator, wherein the performance test system of the steam-water separator includes a steam-water separator and an air drying heater, and the device includes: a control module, for starting the steam-water separator in response to a test data acquisition request of the steam-water separator, and inputting 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 to dry and heat the moisture in the air output by the steam-water separator through the air drying heater; A first determination module is used to determine the water vapor relative humidity and the water vapor absolute humidity at the outlet of the air drying 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 drying heater device, wherein the air parameters include air relative humidity, air temperature and air pressure; The second determination module is used to determine the water content of the air at the outlet of the steam-water separator and the separation efficiency of the steam-water separator based on the relative humidity of the water vapor at the outlet of the air drying heater, the absolute humidity of the water vapor, the second air parameter and the water mass flow rate at the inlet of the steam-water separator.

6. A test data acquisition system for a steam-water separator, characterized in that: include: A steam-water separator, used for separating steam and water; The air drying heater is used to dry and heat 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.

7. The system according to claim 6, characterized in that Also includes: A soda mixer, used for mixing water and air to form a soda mixture, wherein an output end of the soda mixer is connected to an input end of the soda separator; A first pipeline, used for injecting air into the steam-water separator, wherein an output end of the first pipeline is connected to an input end of the steam-water mixer; The second pipeline is used to inject water into the steam-water separator, wherein the output end of the second pipeline is connected to the input end of the steam-water mixer.

8. The system according to claim 7, characterized in that Also includes: A first flow meter, disposed in the first conduit, for measuring air volume flow; a second flow meter, disposed in the second pipeline, for measuring water mass flow; A first air humidity measuring instrument, arranged in the first pipeline, for measuring the relative humidity of the air at the inlet of the steam-water separator; The second air humidity measuring instrument is arranged 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 heater; A first pressure sensor, disposed on the first pipeline, for measuring the air pressure at the inlet of the steam-water separation device; a second pressure sensor, disposed 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, disposed on the first pipeline, for measuring the air temperature at the inlet of the steam-water separation device; The second temperature sensor is arranged at the outlet of the air drying heater and is used to measure the air temperature at the outlet of the air drying heater.

9. The system according to any one of claims 6 to 8, characterized in that A program or instruction is stored thereon, wherein when the program or instruction is executed by a processor, the method for acquiring test data of a steam-water separator as described in any one of claims 1 to 4 is implemented.

10. 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, the steps of the test data acquisition method for the steam-water separator according to any one of claims 1 to 4 are implemented.

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