Liquid metal nuclear reactor coolant filter apparatus

Abstract

This invention discloses a liquid metal nuclear reactor coolant filtration device, comprising: a mounting base, a shell, a filtration assembly, and a liquid guiding assembly; the shell is mounted in the liquid metal coolant reactor via the mounting base; the shell has a first opening and a second opening, and a liquid passage is provided between the first opening and the second opening; the liquid passage includes: a first channel and a second channel, and a connecting hole is provided between the second channel and the first channel, respectively away from the first opening and the second opening; the filtration assembly is installed in the liquid passage. This reduces the impurity content in the coolant, prevents excessive impurity deposition on the surface of the equipment from affecting mass and heat transfer performance, reduces the overall pressure drop, avoids clogging of the flow channels, enables the reactor system to maintain normal operation for a long time, extends its service life, and reduces maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of nuclear reactor technology, and more particularly to a liquid metal nuclear reactor coolant filtration device. Background Technology

[0002] Nuclear energy is the energy produced by nuclear reactions. It has advantages such as high energy density, wide availability of fuel sources, and safety and environmental friendliness, making it one of the most promising future energy sources for mankind. Currently, sodium-cooled fast reactors (SFR) and lead-cooled fast reactors (LFR), two types of liquid metal coolant reactors, are the most promising fourth-generation advanced nuclear energy systems for engineering demonstration and commercial application.

[0003] Compared to other fast reactors, liquid metal coolant reactors possess superior neutronics, thermal-hydraulics, and safety characteristics, and are highly advantageous for reactor miniaturization. However, a series of issues need to be addressed before liquid metal coolant reactors can achieve commercial application. Among these, impurities generated from various sources are particularly critical, such as impurities from raw materials or the smelting process; impurities introduced during transportation, maintenance, and refueling; impurities generated by the corrosion of structural materials by the liquid metal coolant during service; and irradiation activation products. These impurities, flowing with the coolant in the reactor, may deposit on equipment surfaces, affecting mass and heat transfer performance. In more severe cases, they can cause an increase in overall pressure drop or even completely block the flow channels, seriously impacting the normal operation of the reactor system. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a filtration device for liquid metal nuclear reactor coolant.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A liquid metal nuclear reactor coolant filtration device is constructed, comprising: a mounting base, a shell, a filtration assembly, and a liquid guiding assembly; the shell is installed in the liquid metal coolant reactor via the mounting base; the shell is provided with a first opening and a second opening, and a liquid passage is provided between the first opening and the second opening; the liquid passage includes: a first channel and a second channel, and a connecting hole is provided between the second channel and the first channel, respectively away from the first opening and the second opening; the filtration assembly is installed in the liquid passage; the first opening and the second opening are both located on one side of the filtration assembly, and the connecting hole is located on the other side of the filtration assembly; the liquid guiding assembly is installed on the mounting base, drawing coolant from the first opening into the first channel, through the filtration assembly and the second channel, and discharging it from the second opening.

[0006] Furthermore, the filtration assembly includes a support frame and a plurality of filter elements, wherein the support frame is detachably installed in the second channel, and the plurality of filter elements are sequentially installed on the support frame.

[0007] Furthermore, the multiple filter elements are installed in a staggered manner, and there are communicating gaps between adjacent filter elements.

[0008] Furthermore, the filter assembly also includes a protective net mounted on the support frame, the protective net being located on one or both sides of the plurality of filter elements.

[0009] Furthermore, the filter element is a porous structure made of stainless steel fiber felt, glass fiber, or / and ceramic particles.

[0010] Furthermore, the liquid metal nuclear reactor coolant filtration device also includes an agglomeration component installed on the shell, the agglomeration component being an electromagnet and / or a permanent magnet, which adsorbs impurities in the coolant to the vicinity of the first opening and / or the second opening.

[0011] Furthermore, the shell is suspended in the liquid metal coolant reactor via a mounting bracket; the shell is tubular in shape.

[0012] Furthermore, the first channel is disposed on the axis of the tubular housing, and at least one second channel is disposed on the inner periphery of the housing; the first channel and the second channel form a connected n-shape.

[0013] Furthermore, the liquid guiding assembly includes a motor and blades, the motor being mounted on the mounting base and the blades being mounted on the output shaft of the motor, located in the coolant of the first channel.

[0014] Furthermore, the liquid metal nuclear reactor coolant filtration device also includes a seal that can be detachably installed in the first channel; the seal fills the gap between the motor output shaft and the first channel and is located above the connecting hole.

[0015] The implementation of this invention has the following beneficial effects:

[0016] This application uses a mounting base to install the casing in a liquid metal coolant reactor. The casing has a first opening and a second opening, with a liquid passage between the first and second openings. A filter assembly is installed in the liquid passage. The liquid guiding assembly draws in coolant carrying impurities from the first or second opening, and through the filter assembly in the liquid passage, the filter assembly temporarily captures and stores the impurities in the coolant. Then, the purified coolant is discharged from the second or first opening through the liquid guiding assembly. This reduces the impurity content in the coolant, prevents excessive impurity deposition on the surface of the equipment from affecting mass and heat transfer performance, reduces the overall pressure drop, avoids clogging of the flow channels, and enables the reactor system to maintain normal operation for a long time, extending its service life and reducing maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] In the attached image:

[0019] Figure 1 This is a front view of a liquid metal nuclear reactor coolant filtration device provided in an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of a liquid metal nuclear reactor coolant filtration device provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram showing the installation positions of the support frame and filter element provided in an embodiment of the present invention.

[0022] Explanation of markings in the diagram

[0023] Mounting base 1, housing 2, first opening 21, second opening 22, liquid passage 23, first channel 231, second channel 232, connecting hole 233, filter assembly 3, support frame 31, filter element 32, protective net 33, liquid guiding assembly 4, motor 41, blade 42, gathering assembly 5, seal 6. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0025] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0026] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0027] Please see Figures 1-3 In the first embodiment of the present invention, a liquid metal nuclear reactor coolant filtration device includes: a mounting base 1, a housing 2, a filter assembly 3, and a liquid guiding assembly 4. The housing 2 is installed in the liquid metal coolant reactor via the mounting base 1. The housing 2 has a first opening 21 and a second opening 22. A liquid passage 23 is provided between the first opening 21 and the second opening 22. The liquid passage 23 includes a first channel 231 and a second channel 232. A connecting hole 233 is provided between the second channel 232 and the first channel 231, respectively away from the first opening 21 and the second opening 22. The filter assembly 3 is installed within the liquid passage 23. The first opening 21 and the second opening 22 are both located on one side of the filter assembly 3, and the connecting hole 233 is located on the other side of the filter assembly 3. The liquid guiding assembly 4 is installed on the mounting base 1 and draws coolant from the first opening 21 into the first channel 231, through the filter assembly 3 and the second channel 232, and out through the second opening 22.

[0028] This application uses a mounting base 1 to install the casing 2 in a liquid metal coolant reactor. The casing 2 is provided with a first opening 21 and a second opening 22. A liquid passage 23 is provided between the first opening 21 and the second opening 22. A filter assembly 3 is installed in the liquid passage 23. A liquid guiding assembly 4 draws in coolant carrying impurities from the first opening 21 or the second opening 22, and through the filter assembly 3 in the liquid passage 23, the filter assembly 3 temporarily captures and stores the impurities in the coolant. Then, the purified coolant is discharged from the second opening 22 or the first opening 21 through the liquid guiding assembly 4. This reduces the impurity content in the coolant, prevents excessive impurities from depositing on the surface of the equipment and affecting mass and heat transfer performance, reduces the overall pressure drop, avoids clogging of the flow channel, enables the reactor system to maintain normal operation for a long time, extends its service life, and reduces maintenance costs.

[0029] In some embodiments, the liquid passage 23 includes a first channel 231 and a second channel 232. A connecting hole 233 is provided between the second channel 232 and the first channel 231, which is respectively away from the first opening 21 and the second opening 22. The first opening 21 and the second opening 22 are both located on one side of the filter assembly 3, and the connecting hole 233 is located on the other side of the filter assembly 3. The coolant carrying impurities is drawn into the first channel 231 through the first opening 21 using the liquid guiding component 4. The siphon principle of the first channel 231 enhances the convergence of the coolant carrying impurities, allowing the coolant to pick up more surrounding impurities and bring more impurities into the first channel 231. The coolant carrying impurities in the first channel 231 will reach the second channel 232 through the connecting hole 233. The filter component 3 purifies the coolant carrying impurities, separating the coolant and impurities. The first channel 231 and the second channel 232 are set on one side of the filter component 3, so that the purified coolant and the coolant carrying impurities are separated, preventing the coolant and the coolant carrying impurities from mixing again in the liquid passage 23, further improving the purification and filtration efficiency.

[0030] In some embodiments, both the first channel 231 and the second channel 232 may be equipped with filter components 3. The multiple filter components 3 can further improve the purification efficiency, reduce the precipitation of impurities, and enable the equipment to maintain stable operation for a longer period of time.

[0031] The coolant is drawn in or discharged through the first opening 21 and discharged or drawn in through the second opening 22, causing the coolant to circulate in the chamber where the coolant is stored in the liquid metal coolant reactor. The circulating coolant will carry away impurities in the chamber and slowly move them toward the first opening 21 or the second opening 22, so that they are purified by the filter assembly 3, which further improves the purification efficiency.

[0032] In some embodiments, the first opening 21 and / or the second opening 22 can be located on the side or bottom of the housing 2. Under the influence of the coolant buoyancy, impurities will have more difficulty exiting through the second opening 22 or the first opening 21 on the side or bottom, which can improve the capture efficiency of the filter assembly 3 for impurities. Therefore, it can prevent impurities from re-entering the reactor and thus improve the purification efficiency.

[0033] Please see Figures 1-3 In some embodiments, the filter assembly 3 includes a support frame 31 and a plurality of filter elements 32, wherein the support frame 31 is detachably installed in the second channel 232, and the plurality of filter elements 32 are sequentially installed on the support frame 31.

[0034] This application utilizes a support frame 31 to detachably install multiple filter elements 32 within the second channel 232, with the filter elements 32 sequentially mounted on the support frame 31. The multiple filter elements 32 perform multiple purification processes on the coolant carrying impurities entering the second channel 232, allowing the coolant to flow out from the second opening 22. Impurities are captured and stored within the filter elements 32. When the gaps in the filter elements 32 become filled with impurities, rendering them ineffective for purification, the operator can remove the entire housing 2. Then, through disassembly and reassembly, the multiple filter elements 32 and the captured impurities are removed from the second channel 232 using the support frame 31. This reduces the amount of impurities remaining in the reactor, facilitating maintenance or replacement of the multiple filter elements 32, reducing labor intensity, improving maintenance efficiency, saving equipment maintenance time, and further enhancing the purification efficiency of the coolant in the equipment.

[0035] In some embodiments, the inner wall of the second channel 232 is provided with protrusions to restrict the movement of the filter assembly 3. When the operator lowers the carrier frame 31 with multiple filter elements 32 from above the housing 2 into the second channel 232, the protrusions will vertically restrict the carrier frame 31, positioning it above the first opening 21 and the second opening 22. Then, the side wall of the second channel 232 will horizontally restrict the carrier frame 31, allowing it to be removed only from the side closest to the motor 41. The carrier frame 31 can then be secured with bolts, making maintenance and replacement more convenient and labor-saving, reducing labor intensity, and improving purification efficiency. Alternatively, the carrier frame 31 can be magnetically secured within the second channel 232, allowing metallic impurities in the coolant to move closer to the filter assembly 3, improving purification efficiency and making disassembly more convenient and labor-saving.

[0036] In some embodiments, multiple filter elements 32 can be installed in the support frame 31 by means of limiting grooves and bolts, which can keep the filter elements 32 stable in the support frame 31 for a long time and further improve the stability of the entire purification device during operation.

[0037] In some embodiments, multiple filter elements 32 can be sequentially and sealed in the support frame 31, so that the lower filter element 32 can purify the coolant after the upper purification, thereby achieving the purpose of multiple purification of the coolant and improving the purification intensity.

[0038] Please see Figures 1-3 In some embodiments, multiple filter elements 32 are installed in a staggered manner, and a communicating gap is provided between adjacent filter elements 32.

[0039] This application employs a staggered arrangement of multiple filter elements 32, with interconnected gaps between adjacent filter elements 32. A support frame 31 can also create a gap between the filter elements 32 and the second channel 232. This arrangement allows for a more complex flow path for the coolant carrying impurities within the purification device, slowing down the flow rate of the coolant and facilitating the precipitation and separation of impurities from the coolant. This is beneficial for the filter elements 32 to capture impurities, improving purification efficiency. Simultaneously, because the filter elements 32 do not completely fill the flow space, the flow resistance within the entire filter assembly 3 is minimized, reducing the pressure on the liquid guiding assembly 4 within the purification device. This extends the service life of the purification device and ensures safer and more stable operation.

[0040] The gaps between adjacent filter elements 32 allow more impurities to remain, extending the operating time of the purification device within the reactor, thereby reducing the frequency of maintenance, saving maintenance costs, and reducing labor intensity.

[0041] Please see Figures 1-3 In some embodiments, the filter assembly 3 further includes a protective net 33 mounted on a support frame 31, the protective net 33 being located on one or both sides of the plurality of filter elements 32.

[0042] This application utilizes protective nets 33 located on one or both sides of multiple filter elements 32. These nets 33 can block larger diameter impurities, providing protection for the filter elements 32 and reducing maintenance costs. The nets 33 also prevent larger impurities from clogging the filter elements 32, thus avoiding impacts on the pressure in the liquid passage 23 and the purification effect. When larger impurities are blocked by the nets 33, the operator can activate the liquid guiding assembly 4 to reverse the flow of coolant, using the coolant to expel the larger impurities from the housing 2, preventing blockages and further improving purification efficiency. The operator can also remove the entire housing 2 from the liquid metal coolant reactor. Because the larger impurities are blocked by the protective nets 33 around the multiple filter elements 32, the operator can easily and effortlessly remove them without disassembling the filter elements 32, further reducing maintenance labor intensity and improving maintenance and purification efficiency.

[0043] Please see Figures 1-3 In some embodiments, the filter element 32 is a porous structure made of stainless steel fiber felt, glass fiber, or / and ceramic particles.

[0044] Due to the interception effect of the filter element 32, impurities in the coolant will be intercepted on the surface or inside of the filter element 32, thereby purifying the coolant. At the same time, a filter cake will be formed on the surface of the filter element 32, which can further capture impurities in the coolant.

[0045] When the filter element 32 is made of stainless steel fiber felt, the performance parameters of the stainless steel fiber felt can be selected according to the actual particle parameters of the impurities in the reactor. The filter element 32 can be composed of multiple layers of stainless steel fiber felt with different parameters. For example, a filter element 32 composed of double-layer stainless steel fiber felt could have an upper layer of stainless steel fibers with a porosity of 80% and a pore size of 50μm to capture large-sized impurity particles, and a lower layer of stainless steel fibers with a porosity of 90% and a pore size of 10μm for fine filtration to capture small-sized impurity particles. This approach can efficiently utilize stainless steel fiber felt with different performance parameters, reduce the overall filtration resistance of the filter assembly 3, and effectively increase the amount of impurities captured.

[0046] When the filter element 32 is made of glass fiber, the overall weight of the filter element 32 is lighter, which can reduce the weight of the purification device, making it easier to install and maintain, easier to operate, and cheaper.

[0047] When the filter element 32 is a porous structure made of ceramic particles, after the maintenance personnel remove the filter assembly 3 from the housing 2, the filter element 32 with the porous structure made of ceramic particles can be cleaned to remove impurities from the surface and inside of the filter element 32. Then it can be reinstalled on the support frame 31 and placed in the liquid passage 23, so that the filter element 32 can be reused, reducing maintenance costs and making it more environmentally friendly and energy-saving.

[0048] Among them, the filter elements 32 of different materials mentioned above can be combined and used in combination according to the on-site usage environment, thus making them suitable for more usage environments and giving operators more choices.

[0049] Please see Figures 1-3 In some embodiments, the liquid metal nuclear reactor coolant filtration device further includes an agglomeration component 5 installed on the shell 2. The agglomeration component 5 is an electromagnet and / or a permanent magnet, which adsorbs impurities in the coolant to the vicinity of the first opening 21 and / or the second opening 22.

[0050] This application utilizes a gathering component 5, which is an electromagnet and / or a permanent magnet, mounted on the housing 2 to attract impurities in the coolant to the vicinity of the first opening 21 and / or the second opening 22. The magnetism generated by the gathering component 5 attracts metallic impurities in the coolant to the vicinity of the housing 2. Then, by activating the liquid guiding component 4, the coolant converges towards the first opening 211 or the second opening 22 and enters the liquid passage 23. The coolant flowing into the first opening 211 or the second opening 22 entrains the metallic impurities around the gathering component 5, thereby purifying them and increasing the purification range, thus further improving the purification efficiency.

[0051] When the aggregating component 5 is an electromagnet, the operator can control whether the aggregating component 5 generates magnetism through an external operating system. By controlling the voltage reaching the aggregating component 5, the magnetic force range of the aggregating component 5 can be controlled, thus making it suitable for more operating environments and facilitating operation. In the initial stage of coolant use, the magnetism of the aggregating component 5 can be temporarily turned off to save energy and reduce the impact on the equipment.

[0052] When the aggregation component 5 is a permanent magnet, the cost is lower, it is easier to install, simple to operate, and reduces maintenance costs.

[0053] Please see Figures 1-3 In some embodiments, the shell 2 is suspended in the liquid metal coolant reactor by a mounting base 1, and the shell 2 is tubular in shape.

[0054] This application describes a suspended installation of the purification device within a liquid metal coolant reactor via the casing 2 and mounting base 1. This suspended installation allows for an integrated arrangement within the reactor, eliminating the need for additional interfaces on the reactor vessel body to draw coolant out for purification. This ensures the integrity of the reactor body boundary, reduces the risk of coolant leakage, improves safety, and facilitates installation. The suspended installation also simplifies the overall structure of the purification device, reduces requirements on installation location, and allows for installation from any space-constrained location on the reactor top cover, while also facilitating replacement and maintenance.

[0055] This application utilizes a tubular housing 2, which reduces the impact and pressure on the housing 2 within the coolant, resulting in more stable operation of the entire purification device. It also minimizes the impact on the normal circulation of the coolant, allowing it to circulate stably within the equipment.

[0056] Please see Figures 1-3 In some embodiments, a first channel 231 is disposed on the axis of the tubular housing 2, and at least one second channel 232 is disposed on the inner periphery of the housing 2. The first channel 231 and the second channel 232 form a connected n-shape.

[0057] This application arranges a first channel 231 on the axis of a tubular shell 2, and at least one second channel 232 on the inner periphery of the shell 2, forming an interconnected n-shape between the first channel 231 and the second channel 232. When coolant carrying impurities enters the first channel 231, it is diverted to the second channel 232 through the connecting hole 233. This diversion further alleviates the flow pressure on the filter assembly 3 in each second channel 232, improving purification efficiency and providing some protection to the shell 2, thus extending its service life. The interconnected n-shape between the first channel 231 and the second channel 232 prevents cross-flow between the coolant carrying impurities and the purified coolant. After impurities enter from the lower first opening 21 or second opening 22, the buoyancy makes it more difficult for them to exit from the side second opening 22 or first opening 21, thus preventing impurities from re-entering the reactor and further improving purification efficiency.

[0058] The first channel 231 is set on the axis of the tubular shell 2, and the liquid guiding component 4 is set inside the first channel 231. After the liquid guiding component 4 is activated, it can reduce the influence of the centrifugal force generated by the coolant on the shell 2, reduce the deformation and vibration of the shell 2, further extend the service life, and improve the stability and safety of the entire purification device during operation.

[0059] Please see Figures 1-3 In some embodiments, the liquid guiding assembly 4 includes a motor 41 and a blade 42. The motor 41 is mounted on the mounting base 1, and the blade 42 is mounted on the output shaft of the motor 41 and is located in the coolant of the first channel 231.

[0060] This application utilizes a motor 41 mounted on a mounting base 1, with blades 42 mounted on the output shaft of the motor 41, located within the coolant in the first channel 231. Starting the motor 41 drives the blades 42 to rotate via the output shaft, causing the blades 42 to draw coolant carrying impurities from the first opening 21 into the first channel 231. The coolant then passes through the connecting hole 233 into the second channel 232, where it is purified by the filter assembly 3. The purified coolant is then discharged from the second opening 22, thus enabling continuous purification of the coolant and improving purification efficiency. The motor 41 is mounted on the mounting base 1 on the outer surface of the liquid metal coolant reactor, facilitating maintenance and preventing contact between the motor 41 and the coolant, thereby improving safety and operational stability.

[0061] In some embodiments, the motor 41 can be started to drive the blades 42 to rotate in the opposite direction through the output shaft, so that the blades 42 draw the coolant carrying impurities from the second opening 22 into the second channel 232. After being purified by the filter assembly 3, the coolant is then transported to the first channel 231 through the connecting hole 233 and discharged from the first opening 21. This makes it suitable for more application scenarios, can easily remove larger impurities stuck on both sides of the filter assembly 3, avoid damage to the entire purification device, improve safety, and extend the service life.

[0062] Please see Figures 1-3 In some embodiments, the liquid metal nuclear reactor coolant filtration device also includes a seal 6 removably installed in the first channel 231, the seal 6 filling the gap between the output shaft of the motor 41 and the first channel 231, and located above the connecting hole 233.

[0063] This application utilizes a seal 6 that can be detachably installed in the first channel 231. The seal 6 installed on the output shaft can be a labyrinth seal structure, which ensures that the coolant will not flow into the connection between the output shaft and the motor 41 through the gap between the output shaft and the first channel 231. This avoids the coolant from corroding the connection, affecting the service life and safety, and also prevents the coolant from leaking out of the reactor, further improving the sealing performance. It also allows the output shaft to fall as far below the coolant surface as possible, expanding the scope of application.

[0064] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A liquid metal nuclear reactor coolant filtration apparatus, comprising: include: Mounting base (1), housing (2), filter assembly (3) and liquid guiding assembly (4); The shell (2) is installed in the liquid metal coolant reactor via the mounting base (1); the shell (2) is provided with a first opening (21) and a second opening (22), and a liquid passage (23) is provided between the first opening (21) and the second opening (22); the liquid passage (23) includes: a first channel (231) and a second channel (232), and a connecting hole (233) is provided between the second channel (232) and the first channel (231) respectively away from the first opening (21) and the second opening (22); The filter assembly (3) is installed in the liquid passage (23); the first opening (21) and the second opening (22) are both located on one side of the filter assembly (3), and the connecting hole (233) is located on the other side of the filter assembly (3); The liquid guiding assembly (4) is installed on the mounting base (1) to draw coolant from the first opening (21) into the first channel (231), through the filter assembly (3) and the second channel (232), and out through the second opening (22). The filter assembly (3) includes a support frame (31) and a plurality of filter elements (32). The support frame (31) is detachably installed in the second channel (232), and the plurality of filter elements (32) are sequentially installed on the support frame (31). The plurality of filter elements (32) are staggered and interlocked, and there is a communicating gap between adjacent filter elements (32). The liquid metal nuclear reactor coolant filtration device also includes an agglomeration component (5) installed on the shell (2), the agglomeration component (5) being an electromagnet and / or a permanent magnet, which adsorbs impurities in the coolant to the vicinity of the first opening (21) and / or the second opening (22); The liquid guiding assembly (4) includes a motor (41) and a blade (42). The motor (41) is mounted on the mounting base (1), and the blade (42) is mounted on the output shaft of the motor (41) and located in the coolant of the first channel (231).

2. The liquid metal nuclear reactor coolant filtration device of claim 1, wherein, The filter assembly (3) also includes a protective net (33) mounted on the support frame (31), the protective net (33) being located on one or both sides of the plurality of filter elements (32).

3. The liquid metal nuclear reactor coolant filtration device of claim 1, wherein, The filter element (32) is a porous structure made of stainless steel fiber felt, glass fiber, or / and ceramic particles.

4. The liquid metal nuclear reactor coolant filtration device of claim 1, wherein, The shell (2) is suspended in the liquid metal coolant reactor by means of the mounting base (1); the shell (2) is tubular in shape.

5. The liquid metal nuclear reactor coolant filtration device of claim 1, wherein, The first channel (231) is disposed on the axis of the tubular housing (2), and at least one second channel (232) is disposed on the inner periphery of the housing (2); the first channel (231) and the second channel (232) form a connected n-shape.

6. The liquid metal nuclear reactor coolant filtration device of claim 1, wherein, The liquid metal nuclear reactor coolant filtration device also includes a seal (6) that is detachably installed in the first channel (231); the seal (6) fills the gap between the output shaft of the motor (41) and the first channel (231) and is located above the connecting hole (233).

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