Fused salt leakage detection apparatus and power generation system having same

Abstract

The utility model provides a kind of molten salt leakage detection device and the power generation system with it, wherein, molten salt leakage detection device includes: the inside of accommodating box has accommodating space, accommodating box is provided with air inlet, first mounting hole and second mounting hole, first mounting hole and second mounting hole are used to be measured pipeline, air inlet is used to pass into inert gas;First detection component includes first electrode piece and second electrode piece, first electrode piece and second electrode piece are located on the side wall of accommodating box and are oppositely arranged;Second detection component is arranged in accommodating space, and second detection component includes third electrode piece and fourth electrode piece, and third electrode piece and fourth electrode piece are located on the side wall of accommodating box and are oppositely arranged;Signal processing structure is signal connected with first detection component and second detection component. The technical scheme of the application effectively solves the problem that the cost of molten salt leakage detection device in related art is higher and the arrangement is limited.

Description

Technical Field

[0001] This utility model relates to the field of power generation technology, and more specifically, to a molten salt leakage detection device and a power generation system having the same. Background Technology

[0002] Molten salts, due to their high heat capacity and other advantages, are widely used in thermal power plant heat storage and solar thermal power plant energy storage. However, molten salts operate at high temperatures (commonly nitrate molten salts range from approximately 190 to 565°C) and are corrosive. Leaks in pipelines or storage tanks can lead to equipment damage and safety accidents, particularly at valves, pump inlets, and other connections, causing reduced equipment regulation capabilities and operating point drift, thus affecting overall control performance. Molten salts have a high freezing point; leaks solidify rapidly upon cooling and remain inside the insulation layer, making them difficult to detect. Furthermore, molten salt system components are typically covered by thick insulation layers, further complicating leak detection.

[0003] Currently, fiber Bragg grating sensor networks are commonly used in molten salt leak detection. The optical fibers are deployed within the storage tank and insulation layer, demodulating wavelength drift caused by localized temperature rises to achieve continuous distributed detection. This method offers precise location and strong anti-interference capabilities, but it is costly and difficult to install and maintain, making it unsuitable for complex structures and harsh environments. Utility Model Content

[0004] The main objective of this invention is to provide a molten salt leak detection device and a power generation system thereon, in order to solve the problems of high cost and limited deployment of molten salt leak detection devices in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a molten salt leakage detection device is provided, comprising: a receiving box having an internal receiving space, an air inlet, a first mounting hole, and a second mounting hole provided on the receiving box, the first and second mounting holes being used for passing through a pipeline to be tested, and the air inlet being used for introducing inert gas; a first detection component disposed within the receiving space, the first detection component including a first electrode and a second electrode, both located on the side wall of the receiving box and arranged opposite to each other; a second detection component disposed within the receiving space, the second detection component including a third electrode and a fourth electrode, both located on the side wall of the receiving box and arranged opposite to each other; and a signal processing structure signal-connected to both the first and second detection components.

[0006] Furthermore, along the height direction of the receiving box, the first detection component and the second detection component are positioned below the first mounting hole, with the second detection component positioned below the first detection component.

[0007] Furthermore, the electrode spacing between the first electrode and the second electrode is smaller than the electrode spacing between the third electrode and the fourth electrode.

[0008] Furthermore, the electrode spacing between the first electrode and the second electrode is between 2 mm and 5 mm; and / or, the electrode spacing between the third electrode and the fourth electrode is between 8 mm and 15 mm.

[0009] Furthermore, the center lines of the first electrode, the third electrode, and the first mounting hole are all located in the first vertical plane, while the center lines of the second electrode, the fourth electrode, and the second mounting hole are all located in the second vertical plane.

[0010] Furthermore, the molten salt leakage detection device also includes a first retaining ring electrode and a second retaining ring electrode, wherein the first retaining ring electrode is disposed on the outer periphery of the first electrode component and the second retaining ring electrode is disposed on the outer periphery of the second electrode component, and / or, the molten salt leakage detection device also includes a third retaining ring electrode and a fourth retaining ring electrode, wherein the third retaining ring electrode is disposed on the outer periphery of the third electrode component and the fourth retaining ring electrode is disposed on the outer periphery of the fourth electrode component.

[0011] Furthermore, the molten salt leakage detection device also includes a first insulating component and a second insulating component, which are symmetrically arranged on the inner wall of the receiving box. The first electrode and the third electrode are both arranged on the first insulating component, and the second electrode and the fourth electrode are both arranged on the second insulating component.

[0012] Furthermore, the molten salt leak detection device also includes a collection tray, which is disposed at the bottom of the receiving space and located below the first mounting hole, the second mounting hole, the first detection component, and the second detection component.

[0013] Furthermore, the molten salt leakage detection device also includes a self-testing structure, which is signal-connected to both the first detection component and the second detection component. The signal processing structure is signal-connected to the self-testing structure, and the self-testing structure is used to detect the first detection component and the second detection component.

[0014] Furthermore, the housing includes a first cover, a second cover, and a sealing structure. The first cover and the second cover are closable, and the sealing structure is disposed between the first cover and the second cover.

[0015] Furthermore, the first mounting hole is provided on the first cover, the first electrode and the third electrode are both provided on the first cover, the second mounting hole is provided on the second cover, and the second electrode and the fourth electrode are both provided on the second cover.

[0016] Furthermore, the molten salt leakage detection device also includes an air outlet, which is located on the receiving box and communicates with the receiving space. In the height direction of the receiving box, the air outlet is set lower than the air inlet.

[0017] According to another aspect of the present invention, a power generation system is provided, including a molten salt leakage detection device, wherein the molten salt leakage detection device is the aforementioned molten salt leakage detection device.

[0018] The present invention utilizes a housing with an internal space. An air inlet, a first mounting hole, and a second mounting hole are all located on the housing, and the test pipeline passes through the first and second mounting holes. The air inlet is used to introduce inert gas into the housing space. The first and second electrodes are both located on the side wall of the housing and are positioned opposite each other. The third and fourth electrodes are also located on the side wall of the housing and are positioned opposite each other. The signal processing structure is signal-connected to both the first and second detection components. With this configuration, when molten salt leaks (i.e., molten salt enters the housing space), the dielectric constant of the molten salt is greater than that of the inert gas. This causes a change in the equivalent capacitance between the first and second electrodes, and / or between the third and fourth electrodes. This change is transmitted to the signal processing structure, thereby enabling the identification of molten salt leaks. Since the cost of the first, second, third, and fourth electrodes is lower than that of optical fibers in related technologies, the production cost of the molten salt leak detection device can be reduced. Therefore, the technical solution of this application effectively solves the problems of high cost and limited deployment of molten salt leakage detection devices in related technologies. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the molten salt leakage detection device according to the present invention is shown;

[0021] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the molten salt leak detection device from another perspective;

[0022] Figure 3 It shows Figure 1 A schematic diagram of the exploded structure of a molten salt leak detection device;

[0023] Figure 4 It shows Figure 1 A top view of a molten salt leak detection device;

[0024] Figure 5 It shows Figure 4 A schematic diagram of the molten salt leak detection device viewed from the AA direction;

[0025] Figure 6 It shows Figure 5 A magnified view of section C of the molten salt leak detection device;

[0026] Figure 7 It shows Figure 4 A schematic diagram of the molten salt leak detection device from the BB direction.

[0027] The above figures include the following reference numerals:

[0028] 1. Test pipeline; 10. Receiving box; 11. Receiving space; 12. Air inlet; 13. First mounting hole; 14. Second mounting hole; 15. First cover; 16. Second cover; 17. Sealing structure; 18. Air outlet; 20. First detection component; 21. First electrode; 22. Second electrode; 30. Second detection component; 31. Third electrode; 32. Fourth electrode; 40. Signal processing structure; 51. First guard ring electrode; 52. Second guard ring electrode; 53. Third guard ring electrode; 54. Fourth guard ring electrode; 61. First insulating component; 62. Second insulating component; 70. Collection tray; 80. Self-test structure. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] like Figures 1 to 3 As shown, in this embodiment, the molten salt leakage detection device includes: a receiving box 10, a first detection component 20, a second detection component 30, and a signal processing structure 40. The receiving box 10 has an internal receiving space 11. The receiving box 10 is provided with an air inlet 12, a first mounting hole 13, and a second mounting hole 14. The first mounting hole 13 and the second mounting hole 14 are used to pass through the pipe to be tested 1. The air inlet 12 is used to introduce inert gas. The first detection component 20 is disposed within the receiving space 11. The first detection component 20 includes a first electrode 21 and a second electrode 22, both located on the side wall of the receiving box 10 and arranged opposite to each other. The second detection component 30 is disposed within the receiving space 11. The second detection component 30 includes a third electrode 31 and a fourth electrode 32, both located on the side wall of the receiving box 10 and arranged opposite to each other. The signal processing structure 40 is signal-connected to both the first detection component 20 and the second detection component 30.

[0033] Using the technical solution of this embodiment, the receiving box 10 has a receiving space 11 inside. An air inlet 12, a first mounting hole 13, and a second mounting hole 14 are all disposed on the receiving box 10. The test pipeline 1 passes through the first mounting hole 13 and the second mounting hole 14. The air inlet 12 is used to introduce inert gas into the receiving space 11. The first electrode 21 and the second electrode 22 are both disposed on the side wall of the receiving box 10 and are arranged opposite to each other. The third electrode 31 and the fourth electrode 32 are both disposed on the side wall of the receiving box 10 and are arranged opposite to each other. The signal processing structure 40 is signal-connected to both the first detection component 20 and the second detection component 30. With the above-described configuration, when molten salt leaks, i.e., when molten salt enters the containing space 11, the dielectric constant of the molten salt is greater than that of the inert gas. This causes a change in the equivalent capacitance between the first electrode 21 and the second electrode 22, and / or a change in the equivalent capacitance between the third electrode 31 and the fourth electrode 32. This change is transmitted to the signal processing structure 40, thereby enabling the identification of molten salt leakage. Since the cost of the first electrode 21, the second electrode 22, the third electrode 31, and the fourth electrode 32 is lower than that of optical fibers in related technologies, the production cost of the molten salt leakage detection device can be reduced. Therefore, the technical solution of this embodiment effectively solves the problems of high cost and limited layout of molten salt leakage detection devices in related technologies.

[0034] In this embodiment, detection is performed based on data received by the signal processing structure 40. As one implementation, the signal processing structure 40 acquires data at a frequency of at least 10Hz. The built-in algorithm uses a rolling baseline to eliminate long-term drift caused by changes in ambient temperature, etc., and uses statistical methods such as Z-score to determine abnormal signal fluctuations. For example, if the Z-score consistently exceeds 3 for 60 seconds, a "warning" is triggered; if the Z-score exceeds 5, an "alarm" is triggered; and if the signal value approaches the upper limit of the range or the slope of change is extremely large, an "alarm" is triggered. The system can also automatically switch between fine and coarse range channels based on the signal strength to broaden the detection range. Of course, the solution in this application is not limited to the above detection method; other methods known in the prior art can also be used for detection.

[0035] like Figures 3 to 5 as well as Figure 7As shown, in this embodiment, along the height direction of the receiving box 10, the first detection component 20 and the second detection component 30 are positioned below the first mounting hole 13, and the second detection component 30 is positioned below the first detection component 20. This arrangement allows the first detection component 20 and the second detection component 30 to be sequentially distributed vertically, thereby enabling the detection of changes in dielectric constant at different heights within the receiving space 11. When molten salt begins to leak and enters the receiving space 11, the first detection component 20 first detects the change in dielectric constant and then transmits an electrical signal to the signal processing structure 40, enabling the molten salt leakage detection device to identify the leakage and issue an early warning. As the leakage increases, the second detection component 30 can detect the molten salt and transmit the signal to the signal processing structure 40. That is, the first detection component 20 can detect minute amounts of molten salt leakage. When the leakage is large, the molten salt easily accumulates between the first electrode 21 and the second electrode 22, which can prevent the first detection component 20 from effectively detecting the leakage. Therefore, the second detection component 30 is provided to avoid missed detections.

[0036] like Figures 3 to 5 as well as Figure 7 As shown, in this embodiment, the electrode spacing between the first electrode 21 and the second electrode 22 is smaller than the electrode spacing between the third electrode 31 and the fourth electrode 32. Because the electrode spacing between the first electrode 21 and the second electrode 22 is smaller, the first electrode 21 and the second electrode 22 are more sensitive to changes in dielectric constant, thus enabling rapid detection of trace molten salt leaks. As the amount of molten salt leakage gradually increases, the larger electrode spacing of the third electrode 31 and the fourth electrode 32 allows for detection, preventing the first electrode 21 and the second electrode 22 from losing their detection capability due to capacitance exceeding their range during large molten salt leaks, or from molten salt accumulating between the first electrode 21 and the second electrode 22 and causing damage to the first detection component 20. This ensures the continuity, stability, and accuracy of the molten salt leakage detection device.

[0037] Specifically, the above-mentioned arrangement forms a gradient sensitive area inside the accommodating space 11, thereby achieving accuracy from detecting minute leaks to detecting large leaks, and thus improving the accuracy and detection efficiency of the molten salt leak detection device for different leak levels.

[0038] like Figures 3 to 5 as well as Figure 7As shown, in this embodiment, the electrode spacing between the first electrode 21 and the second electrode 22 is between 2 mm and 5 mm; and / or, the electrode spacing between the third electrode 31 and the fourth electrode 32 is between 8 mm and 15 mm. Setting the electrode spacing between the first electrode 21 and the second electrode 22 to between 2 mm and 5 mm is beneficial for capturing subtle changes in the dielectric constant within the detection cavity, providing high sensitivity for detecting small amounts of molten salt leakage. Simultaneously, expanding the electrode spacing between the third electrode 31 and the fourth electrode 32 to between 8 mm and 15 mm maintains an effective detection range as the leakage increases, avoiding signal saturation and ensuring that the detection system provides stable and accurate detection at different leakage stages.

[0039] Specifically, the electrode spacing between the first electrode 21 and the second electrode 22 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, or other dimensions between 2mm and 5mm.

[0040] The electrode spacing between the third electrode 31 and the fourth electrode 32 can be 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, or other sizes between 8mm and 15mm.

[0041] like Figures 3 to 5 as well as Figure 7 As shown, in this embodiment, the center lines of the first electrode 21, the third electrode 31, and the first mounting hole 13 are all located within the first vertical plane, while the center lines of the second electrode 22, the fourth electrode 32, and the second mounting hole 14 are all located within the second vertical plane. This design ensures precise alignment of the first detection component 20 and the second detection component 30 within the accommodating space 11, thereby effectively enhancing the stability and accuracy of the measurement signal.

[0042] Preferably, the first vertical plane and the second vertical plane are arranged on the same plane.

[0043] The pipeline under test 1 is equipped with a docking flange. Molten salt usually leaks from the docking flange. By arranging the first detection component 20 and the second detection component 30 in two mutually perpendicular planes, that is, the first detection component 20 and the second detection component 30 are located directly below the first mounting hole, the first detection component 20 and the second detection component 30 can be directly below the docking flange, thereby enabling rapid identification of the dielectric constant change inside the accommodating space 11.

[0044] like Figure 5 and Figure 7 As shown, in this embodiment, the molten salt leakage detection device further includes a first retaining ring electrode 51 and a second retaining ring electrode 52. The first retaining ring electrode 51 is disposed on the outer periphery of the first electrode component 21, and the second retaining ring electrode 52 is disposed on the outer periphery of the second electrode component 22. The molten salt leakage detection device also includes a third retaining ring electrode 53 and a fourth retaining ring electrode 54. The third retaining ring electrode 53 is disposed on the outer periphery of the third electrode component 31, and the fourth retaining ring electrode 54 is disposed on the outer periphery of the fourth electrode component 32. The voltage of the first detection component 20 is different from the voltage of the second detection component 30. By applying a voltage at the same potential as the first detection component 20 to the first retaining ring electrode 51 and the second retaining ring electrode 52, and applying a voltage at the same potential as the second detection component 30 to the third retaining ring electrode 53 and the fourth retaining ring electrode 54, the electric field boundary can be effectively constrained, making the electric field lines in the accommodating space 11 more uniformly distributed, significantly reducing the measurement error caused by edge effects, and improving the detection accuracy and reliability of the device.

[0045] like Figure 5 and Figure 7 As shown, in this embodiment, the molten salt leakage detection device further includes a first insulating member 61 and a second insulating member 62. The first insulating member 61 and the second insulating member 62 are symmetrically arranged on the inner wall of the receiving box 10. The first electrode member 21 and the third electrode member 31 are both disposed on the first insulating member 61, and the second electrode member 22 and the fourth electrode member 32 are both disposed on the second insulating member 62. The symmetrical arrangement of the first insulating member 61 and the second insulating member 62 on the inner wall of the receiving box 10 forms an effective isolation, that is, the first insulating member 61 and the second insulating member 62 can isolate the first detection component 20 and the second detection component 30 from the receiving box 10. The first electrode member 21 and the third electrode member 31 are both placed on the first insulating member 61, while the second electrode member 22 and the fourth electrode member 32 are located on the second insulating member 62.

[0046] Specifically, the first electrode 21 and the third electrode 31 are fixed to the first insulating component 61 by adhesive bonding, and the second electrode 22 and the fourth electrode 32 are fixed to the second insulating component 62 by adapter bonding, which makes the installation of the first detection component 20 and the second detection component 30 simpler and faster.

[0047] The first insulating component 61 and the second insulating component 62 have high temperature resistance and corrosion resistance. The first insulating component 61 and the second insulating component 62 can be made of ceramic. For example... Figure 3 , Figure 5 as well as Figure 7As shown, in this embodiment, the molten salt leakage detection device further includes a collection tray 70, which is disposed at the bottom of the receiving space 11 and located below the first mounting hole 13, the second mounting hole 14, the first detection component 20, and the second detection component 30. The collection tray 70 can collect leaked molten salt, thereby preventing the leaked molten salt from dripping onto the receiving box 10.

[0048] Specifically, the collection tray 70 can collect and temporarily contain molten salt leaking from the detection chamber, preventing the molten salt from directly damaging the first detection component 20 and the second detection component 30, or damaging the receiving box 10. At the same time, the collection tray 70 allows for more efficient handling of leaked molten salt during maintenance of the molten salt leak detection device, simplifying the cleaning process and improving the maintainability and maintenance efficiency of the device.

[0049] like Figures 1 to 4 As shown, in this embodiment, the molten salt leak detection device further includes a self-testing structure 80. The self-testing structure 80 is signal-connected to both the first detection component 20 and the second detection component 30. The signal processing structure 40 is signal-connected to the self-testing structure 80. The self-testing structure 80 is used to detect the first detection component 20 and the second detection component 30. The self-testing structure 80 can promptly detect problems such as contamination and circuit aging in the first detection component 20 and the second detection component 30, ensuring the reliability of the entire molten salt leak detection device.

[0050] Specifically, the self-test structure 80 has the following structure: a standard capacitor socket signal processing unit is simultaneously provided on both the first detection component 20 and the second detection component 30, or a standard capacitor socket signal processing unit is simultaneously provided at the connection port of the first detection component 20 and the connection port of the second detection component 30, and is connected to the first detection component 20 and the second detection component 30 via a cable. During routine maintenance or troubleshooting, the measurement object can be switched to a standard capacitor with a known capacitance value. If the self-test structure 80 can accurately read this value, it proves that the measurement circuit to the cable connector is healthy, and the problem lies at the sensing end (such as contamination of the first detection component 20 and / or the second detection component 30); otherwise, the fault lies in a structure other than the first detection component 20 and the second detection component 30. This effectively simplifies the fault diagnosis process.

[0051] like Figures 1 to 7As shown, in this embodiment, the receiving box 10 includes a first cover 15, a second cover 16, and a sealing structure 17. The first cover 15 and the second cover 16 are closable, and the sealing structure 17 is disposed between the first cover 15 and the second cover 16. The arrangement of the first cover 15 and the second cover 16 makes the installation of the receiving box 10 easier. When it is necessary to inspect or maintain the first detection component 20 and the second detection component 30, the first cover and the second cover can be opened. At the same time, after the first cover 15 and the second cover 16 are opened, the collection tray 70 can be removed. Of course, in the embodiment not shown in the figure, the receiving box 10 can also be a one-piece structure.

[0052] The sealing structure 17 ensures a tight seal between the first cover 15 and the second cover 16, thereby preventing leakage of inert gas within the containment space 11.

[0053] Specifically, such as Figure 6 As shown, the sealing structure 17 includes a first sealing ring and a second sealing ring. The first sealing ring is disposed on the side of the first cover 15 facing the second cover 16, and the second sealing ring is disposed on the side of the second cover 16 facing the first cover 15. The first sealing ring has a groove, and the second sealing ring can be inserted into the groove, thus improving the sealing effect. Figures 1 to 4 As shown, in this embodiment, a first mounting hole 13 is provided on the first cover 15, and both the first electrode 21 and the third electrode 31 are provided on the first cover 15. A second mounting hole 14 is provided on the second cover 16, and both the second electrode 22 and the fourth electrode 32 are provided on the second cover 16. The first mounting hole 13 on the first cover 15 allows the first electrode 21 and the third electrode 31 to be securely mounted on the first cover 15, ensuring the alignment and effective contact of the electrode assemblies. The second mounting hole 14 on the second cover 16 allows for precise positioning of the second electrode 22 and the fourth electrode 32. This design not only simplifies the assembly process of the device but also improves the overall stability of the molten salt leakage detection device.

[0054] like Figures 1 to 4 As shown, in this embodiment, the molten salt leakage detection device further includes a vent 18, which is disposed on the receiving box 10 and communicates with the receiving space 11. In the height direction of the receiving box 10, the vent 18 is positioned lower than the inlet 12. This design enables the circulation of inert gas within the receiving space 11, ensuring uniform gas distribution within the cavity, thereby improving the accuracy of capacitance measurement.

[0055] The working process of the molten salt leakage detection device in this embodiment is as follows:

[0056] First, the first cover 15 and the second cover 16 are respectively installed on the pipeline to be tested 1, and the first cover 15 and the second cover 16 are connected. Simultaneously, the sealing structure 17 seals the containing space 11. Inert gas is injected into the containing space 11 through the air inlet 12, making the change in dielectric constant within the containing space 11 more noticeable. The first electrode 21 and the second electrode 22 are correspondingly arranged, as are the third electrode 31 and the fourth electrode 32, thus effectively achieving detection. When there is a small amount of molten salt leakage, the electrode spacing between the first electrode 21 and the second electrode 22 is small, making it more sensitive to changes in dielectric constant, thereby achieving molten salt leakage detection. When there is a large amount of molten salt leakage, the third electrode 31 and the fourth electrode 32 can also achieve molten salt leakage detection. The signal processing structure 40 can determine whether there is molten salt leakage based on the detection signals from the first detection component 20 and / or the second detection component 30.

[0057] It should be noted that molten salt, also known as melted salt, refers to inorganic salts that melt at high temperatures. They are commonly used as heat carriers and reaction media in chemical reactions, energy storage, heat exchange, and nuclear reactors. There are many types of molten salts, the most common being chlorides, fluorides, nitrates, and carbonates.

[0058] Molten salt has the following characteristics:

[0059] High heat capacity: Molten salt has a large heat capacity, which can store and release a large amount of heat.

[0060] High thermal conductivity: Molten salt has high thermal conductivity, which enables it to transfer heat quickly.

[0061] Stability: Molten salts exhibit good chemical stability at high temperatures and are not easily decomposed.

[0062] Good fluidity: In the molten state, molten salt has good fluidity and pumpability.

[0063] Low vapor pressure: Molten salt has a low vapor pressure and is not easily volatilized, which is beneficial for long-term use at high temperatures.

[0064] Adjustable melting point: By adjusting the composition of the molten salt, molten salts with different melting points can be obtained to adapt to different working temperatures.

[0065] Non-toxic or low-toxic: Compared with some high-temperature working media, such as organic heat transfer fluids, molten salts have lower toxicity.

[0066] Because molten salt is fluid, it is easy for it to leak from the connecting flange of the test pipeline 1 when it flows in the test pipeline 1. When it leaks, the molten salt overflows from the connecting flange of the test pipeline 1 and drips down. The molten salt can be detected by the molten salt leak detection device during the dripping process.

[0067] The molten salt leak detection device of this embodiment moves the detection point to the near field of the leak. A stable detection space is formed on the surface of the pipeline 1 under test by the first enclosure 15 and the second enclosure 16. Combined with the first detection component 20 and the second detection component 30, it detects changes in dielectric properties. Compared to detection schemes relying on temperature, vision, or acoustics, it is more sensitive to early, concealed, and low-flow molten salt leaks. Furthermore, it does not alter pressure boundaries, does not rely on heat tracing, and has lower modification and maintenance costs. The molten salt leak detection device of this embodiment can provide stable early warnings at the minute stage and maintains the continuity of measurement range and criteria even as the leak increases. After solid salt coverage occurs, the measurement capability can be quickly restored within a shutdown window thanks to the disassembly and resettable self-testing of the first enclosure 15 and the second enclosure 16, reducing downtime losses and spare parts consumption.

[0068] According to another aspect of this application, a power generation system is provided. The power generation system of this embodiment includes a molten salt leakage detection device, which is the aforementioned molten salt leakage detection device. The aforementioned molten salt leakage detection device has good detection accuracy and low cost; therefore, the power generation system having the aforementioned molten salt leakage detection device also has the aforementioned advantages.

[0069] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0072] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A molten salt leakage detection device, characterized in that, include: The container (10) has an internal storage space (11). The container (10) is provided with an air inlet (12), a first mounting hole (13) and a second mounting hole (14). The first mounting hole (13) and the second mounting hole (14) are used to pass through the pipeline to be tested (1). The air inlet (12) is used to introduce inert gas. The first detection component (20) is disposed in the accommodating space (11). The first detection component (20) includes a first electrode (21) and a second electrode (22). The first electrode (21) and the second electrode (22) are both located on the side wall of the accommodating box (10) and are disposed opposite to each other. The second detection component (30) is disposed in the accommodating space (11). The second detection component (30) includes a third electrode (31) and a fourth electrode (32). The third electrode (31) and the fourth electrode (32) are both located on the side wall of the accommodating box (10) and are disposed opposite to each other. The signal processing structure (40) is signal connected to both the first detection component (20) and the second detection component (30).

2. The molten salt leakage detection device according to claim 1, characterized in that, Along the height direction of the receiving box (10), the first detection component (20) and the second detection component (30) are set below the first mounting hole (13), and the second detection component (30) is set below the first detection component (20).

3. The molten salt leakage detection device according to claim 1, characterized in that, The electrode spacing between the first electrode (21) and the second electrode (22) is smaller than the electrode spacing between the third electrode (31) and the fourth electrode (32).

4. The molten salt leakage detection device according to claim 1, characterized in that, The electrode spacing between the first electrode (21) and the second electrode (22) is between 2 mm and 5 mm; and / or, the electrode spacing between the third electrode (31) and the fourth electrode (32) is between 8 mm and 15 mm.

5. The molten salt leakage detection device according to claim 1, characterized in that, The center lines of the first electrode (21), the third electrode (31), and the first mounting hole (13) are all located in the first vertical plane, and the center lines of the second electrode (22), the fourth electrode (32), and the second mounting hole (14) are all located in the second vertical plane.

6. The molten salt leakage detection device according to claim 1, characterized in that, The molten salt leakage detection device further includes a first retaining ring electrode (51) and a second retaining ring electrode (52). The first retaining ring electrode (51) is disposed on the outer periphery of the first electrode (21), and the second retaining ring electrode (52) is disposed on the outer periphery of the second electrode (22). Alternatively, the molten salt leakage detection device further includes a third retaining ring electrode (53) and a fourth retaining ring electrode (54). The third retaining ring electrode (53) is disposed on the outer periphery of the third electrode (31), and the fourth retaining ring electrode (54) is disposed on the outer periphery of the fourth electrode (32).

7. The molten salt leakage detection device according to any one of claims 1 to 6, characterized in that, The molten salt leakage detection device further includes a first insulating element (61) and a second insulating element (62). The first insulating element (61) and the second insulating element (62) are symmetrically arranged on the inner wall of the receiving box (10). The first electrode element (21) and the third electrode element (31) are both arranged on the first insulating element (61), and the second electrode element (22) and the fourth electrode element (32) are both arranged on the second insulating element (62).

8. The molten salt leakage detection device according to any one of claims 1 to 6, characterized in that, The molten salt leakage detection device also includes a collection tray (70), which is disposed at the bottom of the accommodating space (11) and below the first mounting hole (13), the second mounting hole (14), the first detection component (20), and the second detection component (30).

9. The molten salt leakage detection device according to any one of claims 1 to 6, characterized in that, The molten salt leakage detection device further includes a self-testing structure (80), which is signal-connected to both the first detection component (20) and the second detection component (30). The signal processing structure (40) is signal-connected to the self-testing structure (80), and the self-testing structure (80) is used to detect the first detection component (20) and the second detection component (30).

10. The molten salt leakage detection device according to any one of claims 1 to 6, characterized in that, The container (10) includes a first cover (15), a second cover (16) and a sealing structure (17). The first cover (15) and the second cover (16) are closable, and the sealing structure (17) is disposed between the first cover (15) and the second cover (16).

11. The molten salt leakage detection device according to claim 10, characterized in that, The first mounting hole (13) is disposed on the first cover (15), the first electrode (21) and the third electrode (31) are both disposed on the first cover (15), the second mounting hole (14) is disposed on the second cover (16), and the second electrode (22) and the fourth electrode (32) are both disposed on the second cover (16).

12. The molten salt leakage detection device according to any one of claims 1 to 6, characterized in that, The molten salt leakage detection device also includes an air outlet (18), which is disposed on the container (10) and communicates with the container space (11). In the height direction of the container (10), the air outlet (18) is disposed lower than the air inlet (12).

13. A power generation system, comprising a molten salt leakage detection device, characterized in that, The molten salt leakage detection device is the molten salt leakage detection device according to any one of claims 1 to 12.

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