Rapid leakage detection device, condenser system and rapid leakage detection method

Abstract

The invention discloses a rapid leakage detection device, a condenser system and a rapid leakage detection method.The rapid leakage detection device is used for conducting rapid leakage detection on a condenser, the condenser comprises a condenser body and a vertical pipe system connected to the condenser body, and the rapid leakage detection device comprises a sampling point and a dissolved oxygen measuring assembly; the dissolved oxygen measuring assembly is connected to the sampling point and is used for quantitatively measuring the dissolved oxygen content of sample water extracted from the sampling point; wherein the sampling points comprise a plurality of sampling points, and at least part of the sampling points are connected to different areas of the condenser body and used for extracting sample water in the different areas of the condenser body; at least part of the sampling points are connected to different positions of the vertical pipe system and are used for extracting sample water at different positions in the vertical pipe system. Through quantitative measurement of the dissolved oxygen content, the leakage area can be positioned, so that the leakage detection range is effectively reduced, and rapid leakage detection of the condenser is realized.

Description

Technical Field

[0001] The invention relates to the technical field of condenser leak detection in a pressurized water reactor nuclear power plant, and in particular to a rapid leak detection device, a condenser system and a rapid leak detection method. Background Art

[0002] At present, the following six methods are commonly used for leak detection of condenser vacuum system leakage: thin film leak detection, ultrasonic leak detection, foam leak detection, halogen leak detection, pressurized water leak detection, and helium mass spectrometer leak detection. These methods can effectively judge the leakage of suspected leaks. Due to the large number of boundaries and wide range of condensers, the general screening content has more than a thousand items. Therefore, in the screening process, it is necessary to list the possible leaks and then check them one by one. The scope of the list screening is mainly in the system drain and exhaust pipelines, vacuum breaking valves, bursting valves, expansion joints, flanges of various containers, steam traps, instrument pipe sockets, etc.

[0003] In the prior art, Figure 1 As shown in FIG. 1 , it is a schematic diagram of a helium mass spectrometer leak detection device. The helium mass spectrometer leak detection method mainly includes the following steps. First, the air entering the condenser 10 and the non-condensable gas in the turbine exhaust steam will be sucked away by the vacuum pump 20 of the condenser air exhaust system (CVI) and discharged through the exhaust pipeline. Under normal circumstances, the volume content of helium in the atmosphere is about 5.24×10 -6 When the unit is running, the volume content of helium in the exhaust gas extracted by the vacuum pump 20 is about 10 -8 Based on this characteristic, a helium mass spectrometer 40 is installed on the exhaust pipeline 30 of the vacuum pump 20. At the same time, the outlet pressure of the helium cylinder 50 is adjusted to about 2 to 3 bar on site, and the helium is sprayed onto the interface device 60 that may have tightness problems. In this way, a higher concentration of helium will enter the condenser 10 with the air and be extracted by the vacuum pump 20. It usually takes 3 minutes from the helium being sprayed out to the helium mass spectrometer 40 reacting. During this period of time, it is necessary to closely observe whether the background level changes. Generally, if the volume content of helium rises to 10 -6 When the above conditions are met, it can be determined that the interface device has a leakage problem.

[0004] However, although the helium mass spectrometer leak detection method can effectively determine the leak point, it cannot locate the leak point. It can only be screened by a checklist, that is, a list of possible leak points is listed and then checked one by one. Because the condenser has many interfaces and a wide range, the general screening content must be more than a thousand items. This "checklist" leak detection method requires a lot of manpower and material resources, and it is not easy to find more hidden leaks such as internal leaks. Summary of the invention

[0005] The purpose of the present invention is to provide a rapid leak detection device, a condenser system and a rapid leak detection method, aiming to solve the problem that the condenser system leak detection method in the prior art can only be screened through a checklist and cannot locate the leak point, thus consuming a lot of manpower and material resources.

[0006] The embodiment of the present invention provides a rapid leak detection device for rapid leak detection of a condenser, wherein the condenser comprises a condenser body and a riser system connected to the condenser body, the rapid leak detection device comprises a sampling point and a dissolved oxygen measurement component, the dissolved oxygen measurement component is connected to the sampling point, and is used to quantitatively measure the dissolved oxygen content of the sample water extracted from the sampling point;

[0007] Wherein, the sampling points include multiple sampling points, at least some of the sampling points are connected to different areas of the condenser body, for extracting sample water from different areas of the condenser body; at least some of the sampling points are connected to different positions of the riser system, for extracting sample water from different positions of the riser system.

[0008] Optionally, sampling points connected to different areas of the condenser body are first sampling points, the riser system includes a plurality of risers, and a plurality of the first sampling points are arranged close to different risers.

[0009] Optionally, sampling points connected to different positions of the riser system are second sampling points, the riser includes a plurality of riser components, and a plurality of the second sampling points are respectively arranged on different riser components.

[0010] Optionally, the condenser further includes a hydrophobic expansion container connected to the condenser body, and the sampling point further includes a third sampling point connected to the condenser body, and the third sampling point is arranged close to the hydrophobic expansion container.

[0011] Optionally, the hydrophobic expansion container includes a plurality of hydrophobic expansion container components, and the sampling points further include a plurality of fourth sampling points, and the plurality of fourth sampling points are arranged on different hydrophobic expansion container components.

[0012] Optionally, the dissolved oxygen measurement assembly includes multiple sampling head valves and a dissolved oxygen measurement meter, one end of the multiple sampling head valves is correspondingly connected to the multiple sampling points, and the other end of the multiple sampling head valves is connected to the dissolved oxygen measurement meter.

[0013] Optionally, the dissolved oxygen measurement assembly further includes a first cooling rack and a plurality of isolation valves, the other ends of the plurality of sampling head valves are respectively connected to one ends of the plurality of isolation valves through the first cooling rack, and the other ends of the plurality of isolation valves are connected to the dissolved oxygen measurement meter.

[0014] Optionally, the dissolved oxygen measurement assembly further includes a second cooling rack and a joint, the other ends of the plurality of isolation valves are connected to one end of the joint via the second cooling rack, and the other end of the joint is connected to the dissolved oxygen measurement meter.

[0015] Optionally, the dissolved oxygen measurement component further includes a filter disposed between the plurality of sampling head valves and the dissolved oxygen measurement meter, for filtering impurities in the sample water.

[0016] Optionally, the rapid leak detection device further includes an alarm, which is connected to the dissolved oxygen measuring component and is configured to send out an alarm signal when the dissolved oxygen measuring component detects that the dissolved oxygen content exceeds a preset threshold value.

[0017] An embodiment of the present invention further provides a condenser system, comprising a condenser and a riser system connected to the condenser body, and a quick leak detection device as described in any one of the above items.

[0018] Optionally, the condenser includes a first condenser body and a second condenser body, and the riser system includes five risers connected to the first condenser body and two risers connected to the second condenser body.

[0019] Optionally, the condenser further includes a hydrophobic expansion container connected to the first condenser body.

[0020] The embodiment of the present invention further provides a rapid leak detection method, which is applied to the rapid leak detection device as described above, comprising:

[0021] By connecting to sampling points on different areas of the condenser body, sample water from different areas of the condenser body is extracted;

[0022] Extracting water samples from different locations in the standpipe system by connecting to sampling points at different areas of the standpipe system;

[0023] The dissolved oxygen content of the sample water extracted from each sampling point is quantitatively measured by the dissolved oxygen measuring component and cross-compared to determine the leakage location.

[0024] Optionally, the method of quantitatively measuring the dissolved oxygen content of the sample water extracted from each sampling point by the dissolved oxygen measurement component for cross comparison to determine the leakage location includes:

[0025] Determine the initial leakage location by the dissolved oxygen content of the sample water in different areas of the condenser body;

[0026] In combination with the preliminary leakage location, the final leakage location is determined by the dissolved oxygen content of the sample water at different locations of the standpipe system.

[0027] The present invention provides a rapid leak detection device, a condenser system and a rapid leak detection method. The embodiment of the present invention sets a plurality of sampling points in different areas of the condenser body and different positions of the riser system, and uses a dissolved oxygen measurement component to quantitatively measure the dissolved oxygen content of the sample water extracted from each sampling point, so as to quickly and accurately locate the leakage point, thereby effectively narrowing the leak detection range, improving the leak detection efficiency, reducing the manpower and material costs, and realizing rapid leak detection of the condenser. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 will be briefly introduced below. Obviously, the accompanying drawings described below are 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 any creative work.

[0029] Figure 1 A schematic diagram of the structure of a helium mass spectrometer leak detection device provided by the prior art;

[0030] Figure 2 A schematic diagram of the riser arrangement structure of a condenser provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the structure of a dissolved oxygen measurement assembly provided in an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the structure of another dissolved oxygen measurement assembly provided in an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of draining systems on the No. 3 and No. 6 risers connected to the second condenser body provided in an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the structure of the position arrangement of the sampling points of the condenser and the riser provided in an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a flow chart of a rapid leak detection method provided by an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of a sub-process of a rapid leak detection method provided by an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the hydrophobicity of the ACO A column provided in an embodiment of the present invention;

[0038] Fig.10 A schematic diagram of the hydrophobicity of the shell side of the GSS provided in an embodiment of the present invention;

[0039] Fig.11Schematic diagram of the hydrophobicity of AHP 7A and AHP 7A6A provided in the embodiments of the present invention.

[0040] Notes in the figure:

[0041] In the prior art, 10, condenser; 20, vacuum pump; 30, exhaust pipeline; 40, helium mass spectrometer; 50, helium cylinder; 60, interface equipment;

[0042] In each embodiment of the present invention, 100, condenser; 101, condenser body; 1011, first condenser body; 1012, second condenser body; 102, riser system; 1021, riser; 103, drain expansion tank;

[0043] 200. Quick leak detection device; 201. Sampling point; 202. Dissolved oxygen measurement assembly; 2021. Sampling head valve; 2022. Dissolved oxygen measurement meter; 2023. First cooling rack; 2024. Isolation valve; 2025. Second cooling rack; 2026. Connector. DETAILED DESCRIPTION

[0044] 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.

[0045] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0046] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0047] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] After research and analysis, during the operation of the steam turbine unit in a nuclear power plant, the main way to maintain the vacuum of the condenser 100 is to flow cooling water (seawater) through the titanium tube of the condenser 100, condense steam on the surface of the titanium tube, and condense the steam into water in the condenser 100, and the volume decreases rapidly, thereby generating a vacuum. The function of the condenser air exhaust system is to extract the non-condensable gas brought into the condenser 100 with the steam and a small amount of air leaked from the atmosphere, establish and maintain the vacuum of the condenser 100, and improve the economy of the steam turbine unit. However, when the air entering the condenser 100 cannot be discharged through the condenser air exhaust system, it will be entrained by the condensed water to form dissolved oxygen, so dissolved oxygen is a secondary product of the condenser air leakage, that is, the location of the leakage in the condenser 100 can be detected by measuring the content of dissolved oxygen. The specific leak detection device and leak detection method are specifically described in the following embodiments.

[0049] See also Figures 2 to 4 The embodiment of the present invention provides a rapid leak detection device 200 for rapid leak detection of a condenser 100. The condenser 100 includes a condenser body 101 and a riser system 102 connected to the condenser body 101. The rapid leak detection device 200 includes a sampling point 201 and a dissolved oxygen measuring component 202. The dissolved oxygen measuring component 202 is connected to the sampling point 201 and is used to quantitatively measure the dissolved oxygen content of the sample water extracted from the sampling point 201; wherein the sampling point 201 includes a plurality of sampling points 201, at least some of the sampling points 201 are connected to different areas of the condenser body 101, and are used to extract sample water from different areas of the condenser body 101; at least some of the sampling points 201 are connected to different positions of the riser system 102, and are used to extract sample water from different positions of the riser system 102.

[0050] In this embodiment, by setting sampling points 201 in different areas of the condenser body 101 and the riser system 102 and using the dissolved oxygen measurement assembly 202 to quantitatively measure the dissolved oxygen content of the sample water extracted from each sampling point 201, the leakage location can be quickly and accurately determined.

[0051] The quick leak detection device 200 includes a plurality of sampling points 201, some of which are connected to different areas of the condenser body 101, and some of which are connected to different positions of the standpipe system 102. These sampling points 201 are used to extract water samples from different areas, and the dissolved oxygen measurement component 202 is used to quantitatively measure the dissolved oxygen content of these water samples. By comparing the dissolved oxygen content of water samples from different areas, the leak location can be quickly determined.

[0052] The dissolved oxygen measurement component 202 includes a sampling head valve 2021 and a dissolved oxygen measurement meter 2022. One end of the sampling head valve 2021 is connected to the sampling point 201, and the other end is connected to the dissolved oxygen measurement meter 2022. Through this connection method, the dissolved oxygen measurement component 202 can accurately measure the dissolved oxygen content of the sample water, thereby determining the leakage location.

[0053] The quick leak detection device 200 measures the water samples in different areas of the condenser 100 by setting multiple sampling points 201 and combining the quantitative measurement function of the dissolved oxygen measurement component 202. By comparing the dissolved oxygen content of the water samples in different areas, the leak location can be quickly determined, solving the problem that the leak detection method in the prior art is time-consuming, labor-intensive and difficult to locate.

[0054] Further, the sampling points 201 connected to different areas of the condenser body 101 are first sampling points. The riser system 102 includes a plurality of risers 1021 , and the plurality of first sampling points are disposed close to different risers 1021 .

[0055] Specifically, multiple first sampling points are set on different areas of the condenser body 101, close to different risers 1021. Through these first sampling points, sample water from different areas of the condenser body 101 can be extracted and quantitatively measured through the dissolved oxygen measurement component 202. The dissolved oxygen measurement component 202 includes multiple sampling head valves 2021 and a dissolved oxygen measurement meter 2022. One end of the sampling head valve 2021 is correspondingly connected to the multiple sampling points 201, and the other end is connected to the dissolved oxygen measurement meter 2022. In this way, the dissolved oxygen content in different areas of the condenser body 101 can be measured, and the leakage position can be determined.

[0056] In summary, by arranging multiple first sampling points, different areas of the condenser body 101 can be covered to ensure that the sampled water is representative. Combined with the quantitative measurement of the dissolved oxygen measurement component 202, the potential leakage area can be quickly and accurately determined, thereby effectively narrowing the scope of leak detection, avoiding the tedious process of one-by-one inspection in the traditional method, and realizing rapid leak detection of the condenser 100, while improving the leak detection efficiency and saving manpower and material resources.

[0057] Furthermore, the sampling points 201 connected to different positions of the standpipe system 102 are second sampling points. The standpipe 1021 includes a plurality of standpipe 1021 components, and the plurality of second sampling points are respectively arranged on different standpipe 1021 components. In this embodiment, by setting the second sampling points, sample water can be more accurately drawn from different positions of the standpipe system 102, and the dissolved oxygen content can be measured. Due to the complexity and diversity of the standpipe system 102, setting a plurality of second sampling points can cover more potential leakage locations and improve the comprehensiveness and accuracy of the detection. Specifically, each second sampling point is connected to a different standpipe 1021 component, so that it can be ensured that sample water is drawn from each standpipe 1021 component for analysis, thereby better locating the leakage point.

[0058] Further, the condenser 100 further includes a hydrophobic expansion tank 103 connected to the condenser body 101, and the sampling point 201 further includes a third sampling point connected to the condenser body 101, and the third sampling point is arranged near the hydrophobic expansion tank 103. In this embodiment, the hydrophobic expansion tank 103 is a component for processing and expanding the hydrophobic expansion tank in the condenser 100 system. Since the water sample around the hydrophobic expansion tank 103 is more susceptible to leakage. Therefore, setting the sampling point 201 at this position can more accurately monitor the dissolved oxygen content in the area, which helps to quickly locate the leakage point.

[0059] Specifically, the hydrophobic expansion tank 103 includes a plurality of hydrophobic expansion tank 103 components, and the sampling point 201 further includes a plurality of fourth sampling points, which are arranged on different hydrophobic expansion tank 103 components. In this embodiment, in order to solve the problem that the leakage detection method in the prior art cannot accurately locate the leakage point, by setting a plurality of fourth sampling points on the plurality of components of the hydrophobic expansion tank 103, the various components of the hydrophobic expansion tank 103 can be sampled and detected more accurately. In this way, the specific leakage position of the hydrophobic expansion tank 103 can be further determined by measuring the dissolved oxygen content of the sample water extracted from each fourth sampling point, that is, by adding a plurality of fourth sampling points, the leakage of each component of the hydrophobic expansion tank 103 can be detected more meticulously, thereby improving the accuracy and efficiency of the leakage detection.

[0060] Furthermore, the dissolved oxygen measurement component 202 includes a plurality of sampling head valves 2021 and a dissolved oxygen measurement meter 2022, one end of the plurality of sampling head valves 2021 is correspondingly connected to the plurality of sampling points 201, and the other end of the plurality of sampling head valves 2021 is connected to the dissolved oxygen measurement meter 2022. In this embodiment, the dissolved oxygen measurement component 202 can realize quantitative measurement of the dissolved oxygen content of the sample water extracted from the sampling point 201, and by connecting the plurality of sampling points 201 with the plurality of sampling head valves 2021, the sample water of the plurality of sampling points 201 can be measured at the same time, thereby improving the detection efficiency. The dissolved oxygen measurement meter 2022 is used to display and record the dissolved oxygen content, so as to facilitate comparative analysis of the dissolved oxygen content data of each sampling point 201.

[0061] Specifically, the sampling head valve 2021 can be manually or automatically controlled to ensure that the sample water can smoothly enter the dissolved oxygen measuring meter 2022 for detection. The dissolved oxygen measuring meter 2022 can use a high-precision sensor to ensure the accuracy of the measurement results. In order to further improve the detection accuracy, a filter can be set between the sampling head valve 2021 and the dissolved oxygen measuring meter 2022 to filter out impurities in the sample water to prevent them from affecting the measurement results.

[0062] The dissolved oxygen measurement component 202 in this embodiment realizes the synchronous detection of the dissolved oxygen content of the sample water at multiple sampling points 201 through the combination of multiple sampling head valves 2021 and dissolved oxygen measurement meters 2022, which significantly improves the detection efficiency and accuracy, can quickly and accurately determine the leakage location in the condenser 100 system, reduces the investment of manpower and material resources, and improves the reliability and effectiveness of detection.

[0063] like Figure 3 As shown, further, the dissolved oxygen measurement component 202 also includes a first cooling rack 2023 and multiple isolation valves 2024, the other ends of the multiple sampling head valves 2021 are respectively connected to one end of the multiple isolation valves 2024 through the first cooling rack 2023, and the other ends of the multiple isolation valves 2024 are connected to the dissolved oxygen measurement meter 2022.

[0064] In this embodiment, the dissolved oxygen measurement assembly 202 includes a first cooling rack 2023 and a plurality of isolation valves 2024. One end of the plurality of sampling head valves 2021 is connected to the plurality of sampling points 201, and the other end is connected to one end of the plurality of isolation valves 2024 through the first cooling rack 2023, and the other end of the plurality of isolation valves 2024 is connected to the dissolved oxygen measurement meter 2022. Through the provision of the first cooling rack 2023, the sample water extracted from the sampling point 201 can be effectively cooled to avoid the accuracy of the dissolved oxygen measurement being affected by the excessively high temperature of the sample water. The provision of the isolation valve 2024 can isolate the sampling point 201 when necessary, and facilitate the maintenance and replacement of the sampling head valve 2021.

[0065] The dissolved oxygen measurement assembly 202 in this embodiment can improve the accuracy and reliability of dissolved oxygen measurement by providing a first cooling rack 2023 and a plurality of isolation valves 2024. The provision of the cooling rack can effectively reduce the sample water temperature and avoid the interference of high temperature on the measurement results. The provision of the isolation valve 2024 facilitates the maintenance and management of the system and improves the operational stability of the system.

[0066] Further, such as Figure 4 As shown, the dissolved oxygen measurement component 202 also includes a second cooling rack 2025 and a connector 2026, and the other end of the plurality of isolation valves 2024 is connected to one end of the connector 2026 through the second cooling rack 2025, and the other end of the connector 2026 is connected to the dissolved oxygen measurement meter 2022. In this embodiment, the second cooling rack 2025 and the connector 2026 in the dissolved oxygen measurement component 202 are provided to further optimize the temperature control and transmission efficiency of the sample water. By adding the second cooling rack 2025 between the isolation valve 2024 and the dissolved oxygen measurement meter 2022, the temperature of the sample water can be more effectively reduced to ensure the accuracy of the dissolved oxygen measurement. At the same time, the use of the connector 2026 makes the system connection more flexible and convenient, which is helpful for maintaining and replacing components.

[0067] By adding the second cooling rack 2025 and the joint 2026, the quick leak detection device 200 in this embodiment can more accurately control the temperature of the sample water during the dissolved oxygen measurement process, reduce the measurement error caused by temperature fluctuations, and thus improve the reliability and accuracy of the measurement results.

[0068] Further, the dissolved oxygen measurement assembly 202 also includes a filter disposed between the plurality of sampling head valves 2021 and the dissolved oxygen measurement meter 2022, for filtering impurities in the sample water. In the present embodiment, the filter is used to remove impurities in the sample water to ensure that the measurement result of the dissolved oxygen measurement meter 2022 is accurate. The filter can be in a variety of forms, for example, it can be a simple mesh filter or a multi-layer composite filter. Specifically, the filter can be selected according to the type of impurities and particle size in the sample water to achieve the best filtering effect. As a preferred embodiment, the filter can be regularly replaced or cleaned to maintain its filtering performance.

[0069] By adding a filter to the dissolved oxygen measurement assembly 202, the accuracy of the measurement of the dissolved oxygen content of the sample water can be effectively improved, and the interference of impurities on the measurement results can be reduced. Therefore, the rapid leak detection device 200 in this embodiment can provide more accurate and reliable data support when detecting the leakage position of the condenser 100 and the standpipe system 102, further improving the leak detection efficiency and accuracy.

[0070] Furthermore, the quick leak detection device 200 also includes an alarm, which is connected to the dissolved oxygen measurement component 202 and is used to send an alarm signal when the dissolved oxygen measurement component 202 detects that the dissolved oxygen content exceeds a preset threshold. In this embodiment, by adding an alarm, when the dissolved oxygen measurement component 202 detects that the dissolved oxygen content exceeds the preset threshold, the alarm can send an alarm signal in time. As a result, the operator can be quickly reminded of possible leakage problems, so that corresponding measures can be taken in time to avoid greater losses and dangers.

[0071] The embodiment of the present invention further provides a condenser 100 system, comprising a condenser 100 and a riser system 102 connected to a condenser body 101 , and the above-mentioned rapid leak detection device 200 .

[0072] Furthermore, the condenser 100 includes a first condenser body 1011 and a second condenser body 1012 , and the riser system 102 includes five risers 1021 connected to the first condenser body 1011 and two risers 1021 connected to the second condenser body 1012 .

[0073] In a specific embodiment, the first condenser body 1011 and the second condenser body 1012 are separated from each other, each forming an independent steam space. The outer cylinder of the low-pressure cylinder of the steam turbine is directly welded to the neck of the condenser body 101. The circulating water in the condenser body 101 flows perpendicular to the center line of the steam turbine, and the circulating water is arranged in a single flow path, flowing from one side of the condenser body 101 to the other side.

[0074] The condenser body 101 is equipped with 6 drain risers 1021, among which, the No. 1, No. 5, No. 4 and No. 2 risers are connected to the first condenser body 1011, and the No. 3 and No. 6 risers are connected to the second condenser body 1012. After the drain from each system is expanded by the riser 1021, it is condensed into water in the riser 1021 and then enters the condenser body 101. The condensed water in the first condenser body 1011 and the second condenser body 1012 is combined to the condensate outlet mother pipe and then pumped out by the condensate pump. Figure 5 As shown, it is a schematic diagram of the drainage of each system on the No. 3 riser and the No. 6 riser connected to the second condenser body 1012.

[0075] Furthermore, the condenser 100 further comprises a drain expander 103 connected to the first condenser body 1011. The condenser body 101 is further provided with a drain expander 103, and the No. 1 riser, No. 5 riser, No. 4 riser, No. 2 riser and the drain expander 103 are connected to the first condenser body 1011.

[0076] like Figure 6As shown, it is a structural schematic diagram of the position arrangement of multiple sampling points of the condenser 100 and the riser 1021. After the high-temperature and high-pressure drain is expanded through different risers 1021, it enters the hot well from the bottom of the riser 1021 and is pumped away by the condensate pump. Therefore, multiple sampling head valves 2021 in different areas can be used to extract sample water and measure dissolved oxygen in a targeted manner, so as to determine which drain of the riser 1021 the leak comes from, thereby narrowing the scope of investigation. As can be seen from the arrangement of Figure 1, the dissolved oxygen in different areas of different condensers 100 can be measured by switching the sampling head valve 2021, thereby confirming the location of the leak. The corresponding jurisdiction of each sampling point 201 and the potential leaking riser 1021 is listed in the following table.

[0077]

[0078] See also Figure 7 , Figure 7 A flowchart of a rapid leak detection method provided by an embodiment of the present invention is applied to the rapid leak detection device as described above. The method includes steps S101 to S103:

[0079] S101, extracting water samples from different areas of the condenser body through sampling points connected to different areas of the condenser body;

[0080] S102, extracting water samples from different positions in the standpipe system through sampling points connected to different areas of the standpipe system;

[0081] S103. Quantitatively measure the dissolved oxygen content of the sample water extracted from each sampling point through a dissolved oxygen measurement component and perform cross-comparison to determine the leakage location.

[0082] In this embodiment, the sampling device is connected to the sampling points on the condenser body to obtain sample water from each system inside the condenser. At the same time, the sampling device is also connected to the sampling points on different areas of the riser system to obtain sample water at different positions in the riser system. These sampling points should be distributed in different areas of the condenser to ensure that the water quality inside the condenser can be fully reflected, especially the dissolved oxygen content. The leak location is found by measuring and analyzing the dissolved oxygen content of the sample water. The sample water extracted in steps S101 and S102 is quantitatively measured for dissolved oxygen content using a dissolved oxygen measurement component. The measurement results of different sampling points are compared and analyzed to find out the area with abnormal dissolved oxygen content. Specifically, by comparing the dissolved oxygen content of different sampling points in the condenser and the riser system, the dissolved oxygen content in the leakage area is usually different from that in other areas. By analyzing these differences, the approximate location of the leak can be determined.

[0083] In one embodiment, if Figure 8 As shown, step S103 includes steps S201 to S202:

[0084] S201, determining the initial leakage location through the dissolved oxygen content of sample water in different areas of the condenser body;

[0085] S202. Based on the preliminary leakage location, the final leakage location is determined by measuring the dissolved oxygen content of the water samples at different locations of the riser system.

[0086] In this embodiment, the possible range of the leakage location is first narrowed down by measuring the dissolved oxygen content of the sample water in different areas of the condenser body. Specifically, sample water is extracted from different preset sampling points of the condenser body, and the dissolved oxygen content of these sample waters is accurately measured using a dissolved oxygen measuring instrument. The data of the dissolved oxygen content is analyzed to find out the areas that are significantly different from the normal areas. These differences may indicate the existence of a leak. According to the changing trend of the dissolved oxygen content and the structural characteristics of the condenser, the location where the leak may occur is preliminarily determined. Furthermore, combined with the preliminary leakage location, the final leakage location is determined by the dissolved oxygen content of the sample water at different locations of the riser system.

[0087] In a specific embodiment, Fig. 9 As shown, a sampling point is set at the outlet of the ACO (low-pressure feedwater heater drain recovery system) drain pump, and the sampling of the ACO column A pump outlet is used as an example. The drains of low-pressure heater 4A and low-pressure heater 3A are normally discharged to the ACO No. 1 drain tank. The ACOA column pump draws sample water from the No. 1 drain tank and injects the drain into the feedwater pipe after the low-pressure heater 3A. Therefore, if the oxygen content at the outlet of the ACO column A pump is abnormal, the leak detection area should be focused on the steam side interfaces of the low-pressure heater 3A, low-pressure heater 4A and ACO No. 1 drain tank. On the contrary, if the oxygen content at the outlet of the ACOA column is normal, the low-pressure heater 3A, low-pressure heater 4A and ACO No. 1 drain tank can be excluded from the key leak detection area.

[0088] In another specific embodiment, Fig.10 As shown, at the sampling point of the GSS (steam-water separator reheater system) drain pump outlet, the sampling of the GSS A column drain pump outlet is also used as an example. The GSS A column shell side drain is normally discharged to the GSS A column shell side drain tank. The GSS A column pump draws sample water from the shell side drain tank and injects the drain into the deaerator. Therefore, if the oxygen content at the GSS A column pump outlet is abnormal, the leak detection area should be focused on the GSS A column shell side and the GSS A column shell side drain tank interfaces. On the contrary, if the GSS A column drain pump outlet oxygen content is normal, the GSS A column shell side and the GSS A column shell side drain tank interfaces can be excluded from the key leak detection area.

[0089] In another specific embodiment, Fig.11As shown in the figure, sampling points are set in the drains of AHP (high pressure feed water heater) 7A and AHP6A, and the drain sampling of AHPA is taken as an example. In addition to the drain produced by the 7-stage extraction steam, AHP 7A also contains the pipe-side drain of the 2nd stage heater of GSS A. The heat source of the GSS2-stage heater comes from the main steam VVP. Therefore, when the oxygen content of the AHP 7A drain is abnormal, the AHP 7A extraction steam pipeline and the related pipeline interfaces of the GSS2-stage heater should be checked in particular.

[0090] The drain of AHP 6A mainly includes the drain of GSS1-level heater, whose heat source comes from the 7-stage steam extraction; the drain generated by the 6-stage steam extraction of AHP 6A itself, and the drain generated by AHP 7A. At this time, if the oxygen content of 7A drain is normal and the dissolved oxygen of 6A is high, the relevant interfaces of AHP 6A steam extraction and GSS1-level heater should be checked in particular.

[0091] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described equipment, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0092] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A rapid leak detection device for rapid leak detection of a condenser, wherein the condenser comprises a condenser body and a riser system connected to the condenser body, characterized in that: The rapid leak detection device comprises a sampling point and a dissolved oxygen measuring component, wherein the dissolved oxygen measuring component is connected to the sampling point and is used to quantitatively measure the dissolved oxygen content of the sample water extracted from the sampling point; Wherein, the sampling points include multiple sampling points, at least some of the sampling points are connected to different areas of the condenser body, for extracting sample water from different areas of the condenser body; at least some of the sampling points are connected to different positions of the riser system, for extracting sample water from different positions of the riser system.

2. The rapid leak detection device according to claim 1, characterized in that: The sampling points connected to different areas of the condenser body are first sampling points. The riser system includes a plurality of risers, and a plurality of the first sampling points are arranged close to different risers.

3. The rapid leak detection device according to claim 2, characterized in that: The sampling points connected to different positions of the riser system are second sampling points. The riser includes a plurality of riser components, and a plurality of the second sampling points are respectively arranged on different riser components.

4. The rapid leak detection device according to claim 1, characterized in that: The condenser further comprises a hydrophobic expansion container connected to the condenser body, and the sampling point further comprises a third sampling point connected to the condenser body, and the third sampling point is arranged close to the hydrophobic expansion container.

5. The rapid leak detection device according to claim 4, characterized in that: The hydrophobic expansion container includes a plurality of hydrophobic expansion container components, and the sampling points further include a plurality of fourth sampling points, and the plurality of fourth sampling points are arranged on different hydrophobic expansion container components.

6. The rapid leak detection device according to claim 1, characterized in that: The dissolved oxygen measurement assembly includes a plurality of sampling head valves and a dissolved oxygen measurement meter. One end of the plurality of sampling head valves is correspondingly connected to the plurality of sampling points, and the other end of the plurality of sampling head valves is connected to the dissolved oxygen measurement meter.

7. The rapid leak detection device according to claim 6, characterized in that: The dissolved oxygen measurement assembly also includes a first cooling rack and a plurality of isolation valves. The other ends of the plurality of sampling head valves are respectively connected to one end of the plurality of isolation valves through the first cooling rack, and the other ends of the plurality of isolation valves are connected to the dissolved oxygen measurement meter.

8. The rapid leak detection device according to claim 7, characterized in that: The dissolved oxygen measurement assembly further includes a second cooling rack and a joint, the other ends of the plurality of isolation valves are connected to one end of the joint through the second cooling rack, and the other end of the joint is connected to the dissolved oxygen measurement meter.

9. The rapid leak detection device according to claim 6, characterized in that: The dissolved oxygen measurement assembly also includes a filter disposed between the plurality of sampling head valves and the dissolved oxygen measurement meter, and is used for filtering impurities in the sample water.

10. The rapid leak detection device according to claim 1, characterized in that: The rapid leak detection device also includes an alarm, which is connected to the dissolved oxygen measuring component and is used to send an alarm signal when the dissolved oxygen measuring component detects that the dissolved oxygen content exceeds a preset threshold.

11. A condenser system, characterized in that: It comprises a condenser and a riser system connected to the condenser body, and a quick leak detection device as claimed in any one of claims 1 to 10.

12. The condenser system according to claim 11, characterized in that: The condenser includes a first condenser body and a second condenser body, and the riser system includes five risers connected to the first condenser body and two risers connected to the second condenser body.

13. The condenser system according to claim 12, characterized in that: The condenser further includes a drain expansion container connected to the first condenser body.

14. A rapid leak detection method, applied to the rapid leak detection device according to claims 1-10, characterized in that: include: By connecting to sampling points on different areas of the condenser body, sample water from different areas of the condenser body is extracted; Extracting water samples from different locations in the standpipe system by connecting to sampling points at different areas of the standpipe system; The dissolved oxygen content of the sample water extracted from each sampling point is quantitatively measured by the dissolved oxygen measuring component and cross-compared to determine the leakage location.

15. The rapid leak detection method according to claim 14, characterized in that: The method of quantitatively measuring the dissolved oxygen content of the sample water extracted from each sampling point by the dissolved oxygen measurement component for cross comparison to determine the leakage location includes: Determine the initial leakage location by the dissolved oxygen content of the sample water in different areas of the condenser body; In combination with the preliminary leakage location, the final leakage location is determined by the dissolved oxygen content of the sample water at different locations of the standpipe system.

Images