Liquid metal nuclear reactor coolant filtering device

Abstract

The invention discloses a liquid metal nuclear reactor coolant filtering device which comprises a mounting seat, a shell, a filtering assembly and a liquid guide assembly, the shell is mounted in the liquid metal coolant reactor through the mounting seat; the shell is provided with a first opening and a second opening, and a liquid passing channel is arranged between the first opening and the second opening; the liquid passing channel comprises a first channel and a second channel, and a communicating hole far away from the first opening and the second opening is formed between the second channel and the first channel; and the filtering assembly is mounted in the liquid passing channel. Therefore, the content of impurities in the coolant is reduced, the condition that more impurities are deposited on the surface of equipment to influence mass transfer and heat transfer performance is avoided, the overall pressure drop is reduced, a runner is prevented from being blocked, a reactor system can keep normal operation for a long time, the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear reactors, and in particular to a liquid metal nuclear reactor coolant filtering device. Background Art

[0002] Nuclear energy, generated through nuclear reactions, offers advantages such as high energy density, a wide range of fuel sources, and safety and environmental friendliness, making it one of humanity's most promising future energy sources. Currently, the sodium-cooled fast reactor (SFR) and lead-cooled fast reactor (LFR), two liquid metal coolant reactors, are the fourth-generation advanced nuclear energy systems with the greatest potential for engineering demonstration and commercial application.

[0003] Compared with other fast reactors, liquid metal coolant reactors (LMCRs) have excellent neutronics, thermal hydraulics, and safety characteristics, and are highly conducive to reactor miniaturization. However, before LMRs can be commercialized, a series of issues remain to be resolved. Among these, impurities arising from various reasons are particularly critical, such as impurities introduced from raw materials or the smelting process; impurities introduced during transportation, maintenance, loading and unloading; impurities generated by corrosion of structural materials by the liquid metal coolant during service; and irradiation activation products. As the coolant flows through the reactor, these impurities may deposit on equipment surfaces, affecting mass and heat transfer performance. In more serious cases, they can increase the overall pressure drop or even completely block the flow path, severely 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 liquid metal nuclear reactor coolant filtering device.

[0005] The technical solution adopted by the present invention to solve its technical problems is: constructing a liquid metal nuclear reactor coolant filter device, including: a mounting seat, a shell, a filter assembly and a liquid guide assembly; the shell is installed in the liquid metal coolant reactor through the mounting seat; a first opening and a second opening are provided on the shell, 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 away from the first opening and the second opening is provided between the second channel and the first channel; the filter assembly is installed in the liquid passage; the first opening and the second opening are both located on one side of the filter assembly, and the connecting hole is located on the other side of the filter assembly; the liquid guide assembly is installed on the mounting seat, and the coolant is sucked from the first opening into the first channel, passes through the filter assembly and the second channel, and is discharged from the second opening.

[0006] Furthermore, the filter assembly includes: a carrier and a plurality of filter elements, the carrier is detachably mounted in the second channel, and the plurality of filter elements are sequentially mounted on the carrier.

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

[0008] Furthermore, the filter assembly further includes a protective net mounted on the supporting frame, and the protective net is located on one side 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 and / or ceramic particles.

[0010] Furthermore, the liquid metal nuclear reactor coolant filtering device also includes a gathering component installed on the shell, and the gathering component is 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 and installed in the liquid metal coolant reactor through a mounting seat; the shell is tubular throughout.

[0012] Furthermore, the first channel is arranged on the axis of the tubular shell, and at least one second channel is arranged on the inner periphery of the shell; the first channel and the second channel form an n-shaped connection.

[0013] Furthermore, the liquid guiding assembly includes: a motor and a blade, the motor is mounted on the mounting seat, and the blade is mounted on the output shaft of the motor and is located in the coolant of the first channel.

[0014] Furthermore, the liquid metal nuclear reactor coolant filtering device also includes a sealing member that is detachably mounted in the first channel; the sealing member fills the gap between the output shaft of the motor and the first channel and is located above the communicating hole.

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

[0016] The present application installs the shell in a liquid metal coolant reactor through a mounting seat, and a first opening and a second opening are provided on the shell, and a liquid flow channel is provided between the first opening and the second opening. The filter assembly is installed in the liquid flow channel, and the liquid guide assembly draws in the coolant carrying impurities from the first opening or the second opening, passes through the filter assembly in the liquid flow channel, and uses the filter assembly to temporarily capture the impurities in the coolant carrying impurities and store them in the filter assembly, and then discharges the purified coolant from the second opening or the first opening through the liquid guide assembly, thereby reducing the content of impurities in the coolant, avoiding the deposition of a large amount of impurities on the surface of the equipment to affect the mass transfer and heat transfer performance, reducing the overall pressure drop, avoiding blockage of the flow channel, so that the reactor system can maintain normal operation for a long time, extending the service life, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] In the attached figure:

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

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

[0021] Figure 3 It is a schematic diagram of the installation position of the carrier frame and the filter element provided in an embodiment of the present invention.

[0022] Description of the marks in the figure

[0023] Mounting base 1, shell 2, first opening 21, second opening 22, liquid passage 23, first channel 231, second channel 232, connecting hole 233, filter assembly 3, carrier frame 31, filter element 32, protective net 33, liquid guide assembly 4, motor 41, blades 42, aggregation assembly 5, and seal 6. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0025] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0027] See also Figure 1-Figure 3 In a first embodiment of the present invention, a liquid metal nuclear reactor coolant filter device comprises: a mounting base 1, a shell 2, a filter assembly 3, and a liquid guide assembly 4. The shell 2 is mounted in a liquid metal coolant reactor via the mounting base 1. The shell 2 is provided with a first opening 21 and a second opening 22. A liquid passage 23 is provided between the first and second openings 21 and 22. The liquid passage 23 comprises 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 and second openings 21 and 22. The filter assembly 3 is mounted within the liquid passage 23. The first and second openings 21 and 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 guide assembly 4 is mounted on the mounting base 1 and draws coolant from the first opening 21 into the first channel 231, passes through the filter assembly 3 and the second channel 232, and is discharged from the second opening 22.

[0028] In the present application, the shell 2 is installed in the liquid metal coolant reactor through the mounting base 1, and a first opening 21 and a second opening 22 are provided on the shell 2. A liquid passage 23 is provided between the first opening 21 and the second opening 22, and the filter component 3 is installed in the liquid passage 23. The liquid guide component 4 sucks the coolant carrying impurities from the first opening 21 or the second opening 22, passes through the filter component 3 in the liquid passage 23, and uses the filter component 3 to temporarily capture the impurities in the coolant carrying impurities and store them in the filter component 3. Thereafter, the purified coolant is discharged from the second opening 22 or the first opening 21 through the liquid guide component 4, thereby reducing the content of impurities in the coolant, avoiding the impurities from being deposited on the surface of the equipment and affecting the mass transfer and heat transfer performance, reducing the overall pressure drop, avoiding blockage of the flow channel, and enabling the reactor system to maintain normal operation for a long time, extending the service life, and reducing maintenance costs.

[0029] In some embodiments, 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, which is respectively away from the first opening 21 and the second opening 22, and the first opening 21 and the second opening 22 are both located on one side of the filter component 3, and the connecting hole 233 is located on the other side of the filter component 3. The liquid guiding component 4 is used to suck the coolant carrying impurities from the first opening 21 into the first channel 231. The siphon principle of the first channel 231 is used to improve the convergence of the coolant carrying impurities, so that the coolant can roll up more surrounding impurities, allowing more impurities to enter the first channel 231. The coolant carrying impurities entering the first channel 231 will reach the second channel 232 through the connecting hole 233. The filter component 3 is used to purify the coolant carrying impurities to separate the coolant and impurities. The first channel 231 and the second channel 232 are arranged on one side of the filter component 3, so that the purified coolant and the coolant carrying impurities are diverted, avoiding the coolant and the coolant carrying impurities from mixing again in the liquid channel 23, thereby further improving the efficiency of purification and filtration.

[0030] In some embodiments, filter components 3 may be provided in both the first channel 231 and the second channel 232. 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] Among them, the coolant is sucked in or discharged through the first opening 21, and the coolant is discharged or sucked in through the second opening 22, so that the coolant is self-circulated in the chamber for storing the coolant of the liquid metal coolant reactor. The circulating coolant will roll up the impurities in the chamber and slowly approach the first opening 21 or the second opening 22, so that it passes through the filter component 3 for purification, thereby further improving the purification efficiency.

[0032] In some embodiments, the first opening 21 and / or the second opening 22 can be set on the side or bottom of the shell 2. Under the influence of the buoyancy of the coolant, it will be more difficult for impurities to escape from the second opening 22 or the first opening 21 on the side or bottom, which can improve the capture efficiency of the filter component 3 for impurities, thereby preventing impurities from re-entering the reactor, thereby improving the purification efficiency.

[0033] See also Figure 1-Figure 3 In some embodiments, the filter assembly 3 includes: a carrier frame 31 and a plurality of filter elements 32 . The carrier frame 31 is detachably mounted in the second channel 232 , and the plurality of filter elements 32 are sequentially mounted on the carrier frame 31 .

[0034] The present application is detachably mounted in the second channel 232 via a carrier 31, and a plurality of filters 32 are sequentially mounted on the carrier 31. The plurality of filters 32 are used to perform multiple purifications on the coolant carrying impurities entering the second channel 232, so that the coolant flows out from the second opening 22, while the impurities are captured and stored by the plurality of filters 32. When the gaps in the filters 32 are filled with impurities and cannot achieve the purification effect, the operator can remove the entire housing 2, and then remove the plurality of filters 32 and the captured impurities from the second channel 232 by disassembly and assembly using the carrier 31, thereby reducing the amount of impurities remaining in the reactor and facilitating maintenance or replacement of the plurality of filters 32, thereby reducing labor intensity and improving maintenance efficiency, thereby saving time for equipment maintenance and further improving the purification efficiency of the coolant in the equipment.

[0035] In some embodiments, a protrusion that limits the movement of the filter assembly 3 is provided on the inner wall of the second channel 232. When the operator lowers the carrier 31 with multiple filter elements 32 from the top of the housing 2 into the second channel 232, the protrusion will limit the carrier 31 in the vertical direction, so that the carrier 31 is located above the first opening 21 and the second opening 22. The side wall of the second channel 232 then limits the carrier 31 in the horizontal direction, so that the carrier 31 can only be removed from the side close to the motor 41. The carrier 31 can then be fixed with bolts, making maintenance and replacement more convenient and labor-saving, reducing labor intensity and improving purification efficiency. The carrier 31 can also be confined in the second channel 232 by magnetic attraction, which can make metal impurities in the coolant closer to the filter assembly 3, improve the efficiency of evolution, and make disassembly more convenient and labor-saving.

[0036] In some embodiments, multiple filter elements 32 can be installed in the support frame 31 through limiting grooves and bolts, which can enable the filter elements 32 to maintain long-term stability in the support frame 31, further improving the stability of the entire purification device during operation.

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

[0038] See also Figure 1-Figure 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] In the present application, a plurality of filter elements 32 are installed in a staggered manner with gaps between adjacent filter elements 32. A certain gap can also be provided between the filter element 32 and the second channel 232 by means of a carrier frame 31. This arrangement can make the flow path of the coolant carrying impurities in the purification device more complicated, slow down the flow rate of the coolant carrying impurities, and facilitate the precipitation of impurities in the coolant and separation from the coolant, which is beneficial for the filter element 32 to capture the impurities therein and improve the purification efficiency. At the same time, since the filter element 32 does not completely fill the flow space, the flow resistance inside the entire filter assembly 3 can be minimized, reducing the pressure of the liquid guide assembly 4 in the purification device, which is beneficial to extending the service life of the purification device and making it safer and more stable during operation.

[0040] The gaps provided between adjacent filter elements 32 can retain more impurities, thereby extending the operating time of the purification device in the reactor, thereby reducing the number of maintenance times, saving maintenance costs, and alleviating labor intensity.

[0041] See also Figure 1-Figure 3 In some embodiments, the filter assembly 3 further includes a protective net 33 mounted on the carrier 31 , and the protective net 33 is located on one side or both sides of the plurality of filter elements 32 .

[0042] The present application uses a protective net 33 located on one or both sides of multiple filter elements 32. The protective net 33 can block impurities with larger diameters, play a certain protective role for the filter elements 32, and thus reduce maintenance costs. The protective net 33 can also prevent larger impurities from blocking the filter elements 32, affecting the pressure in the liquid channel 23 and the purification effect. When larger impurities are intercepted by the protective net 33, the operator can start the liquid guide component 4 to reversely transport coolant, using the coolant to discharge the larger impurities from the shell 2, avoiding blockage and further improving the purification efficiency. The operator can also remove the shell 2 as a whole from the liquid metal coolant reactor. Since the larger impurities are blocked by the protective net 33 on the periphery of the multiple filter elements 32, the operator can easily and labor-savingly remove the larger impurities without having to disassemble the multiple filter elements 32, further reducing the labor intensity during maintenance and improving the efficiency of maintenance and purification.

[0043] See also Figure 1-Figure 3 In some embodiments, the filter element 32 is a porous structure made of stainless steel fiber felt, glass fiber and / or 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 filter element 32 is a stainless steel fiber felt, its performance parameters can be selected based on the actual parameters of the impurity particles within the reactor. Filter element 32 can be composed of multiple layers of stainless steel fiber felt with different parameters. For example, a double-layered filter element 32 could have an upper layer of stainless steel fiber felt with an 80% porosity and a 50μm pore size to capture large impurity particles, while a lower layer of stainless steel fiber felt with a 90% porosity and a 10μm pore size to finely filter and capture small impurity particles. This solution efficiently utilizes stainless steel fiber felts with different performance parameters, reducing the filtration resistance of the entire filter assembly 3 and effectively increasing the amount of impurities captured.

[0046] Among them, when the filter element 32 is made of glass fiber, the overall filter element 32 is lighter, which can reduce the weight of the purification device, thereby facilitating installation and maintenance, making operation more labor-saving and cost-effective.

[0047] Among them, when the filter element 32 is a porous structure made of ceramic particles, when the maintenance personnel remove the filter assembly 3 from the shell 2, the filter element 32 made of the porous structure of ceramic particles can be cleaned, and impurities on the surface and inside of the filter element 32 can be removed. Then, it can be reinstalled on the support frame 31 and placed in the liquid channel 23, and the filter element 32 can be reused, which reduces the maintenance cost and is more environmentally friendly and energy-saving.

[0048] The filter elements 32 made of different materials can be used in combination according to the on-site usage environment, thereby being applicable to more usage environments and providing operators with more choices.

[0049] See also Figure 1-Figure 3 In some embodiments, the liquid metal nuclear reactor coolant filter device further includes a gathering component 5 mounted on the shell 2, and the gathering component 5 is an electromagnet and / or a permanent magnet, which absorbs impurities in the coolant to the vicinity of the first opening 21 and / or the second opening 22.

[0050] The present application uses a gathering component 5 installed on the shell 2, which is an electromagnet and / or a permanent magnet, to adsorb 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 can adsorb metal impurities in the coolant to the periphery of the shell 2, and then the coolant is converged to the first opening 211 or the second opening 22 and enters the liquid passage 23 by starting the liquid guide component 4. The coolant flowing into the first opening 211 or the second opening 22 will draw the metal impurities around the gathering component 5 into it, thereby purifying it, thereby increasing the scope of purification and further improving the efficiency of purification.

[0051] Among them, when the aggregation component 5 is an electromagnet, the operator can control whether the aggregation component 5 generates magnetism through an external operating system, and control the voltage reaching the aggregation component 5 to control the magnetic range of the aggregation component 5, so that it can be applied to more usage environments and facilitate operation. The magnetism of the aggregation component 5 can be temporarily turned off in the initial stage of coolant use to save energy and reduce the impact on the equipment.

[0052] Among them, when the gathering component 5 is a permanent magnet, the cost is lower, it is easy to install, simple to operate, and reduces the cost of maintenance.

[0053] See also Figure 1-Figure 3 In some embodiments, the shell 2 is suspended and installed in the liquid metal coolant reactor through the mounting base 1, and the shell 2 is tubular throughout.

[0054] This application utilizes a housing 2 for suspension installation within a liquid metal coolant reactor via a mounting base 1. The suspension design allows for integrated placement of the purification device within the reactor, eliminating the need for additional interfaces on the reactor vessel to extract coolant from the reactor for purification. This ensures the integrity of the reactor's boundaries, reduces the risk of coolant leakage, improves safety, and facilitates installation. The suspension-mounted purification device has a simpler overall structure and fewer installation requirements. It can be installed from any location on the reactor roof that meets the required space requirements, making replacement and maintenance easier.

[0055] The present application reduces the impact and pressure of the shell 2 in the coolant by making the shell 2 tubular throughout, making the entire purification device run more smoothly. It can also reduce the impact on the normal circulation of the coolant and allow the coolant to circulate stably inside the device.

[0056] See also Figure 1-Figure 3 In some embodiments, 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 an N-shaped connection.

[0057] The present application arranges a first channel 231 on the axis of a tubular shell 2, and at least one second channel 232 is arranged around the inner periphery of the shell 2, forming an n-shaped interconnection between the first channel 231 and the second channel 232. This allows coolant carrying impurities to enter the first channel 231 and then be diverted through the connecting holes 233 to the second channel 232. This diversion further alleviates the flow pressure of the filter assembly 3 in each second channel 232, improving purification efficiency. It also provides a certain degree of protection for the shell 2 and extends its service life. The n-shaped interconnection 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 through the first opening 21 or the second opening 22 at the lower end, buoyancy makes it more difficult for the impurities to exit through the second opening 22 or the first opening 21 at the side, thereby preventing the impurities from re-entering the reactor and further improving purification efficiency.

[0058] Among them, 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 started, 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] See also Figure 1-Figure 3 In some embodiments, the liquid guiding component 4 includes: a motor 41 and a blade 42 , the motor 41 is mounted on the mounting seat 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] The present application is mounted on the mounting base 1 by a motor 41, and the blades 42 are mounted on the output shaft of the motor 41 and are located in the coolant of the first channel 231. The motor 41 is started to drive the blades 42 to rotate through the output shaft, so that the blades 42 draw the coolant carrying impurities from the first opening 21 into the first channel 231. The coolant carrying impurities then enters the second channel 232 through the connecting hole 233 and is purified by the filter assembly 3. The purified coolant is discharged from the second opening 22, thereby continuously purifying the coolant and improving the purification efficiency. Among them, the motor 41 is mounted on the mounting base 1 and is located on the outer surface of the liquid metal coolant reactor, which is convenient for maintenance and can also prevent the motor 41 from contacting the coolant and affecting the operation, thereby improving safety and operational stability.

[0061] Among them, 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 will suck the coolant carrying impurities from the second opening 22 into the second channel 232, and then pass through the filter component 3 for purification, and then the coolant is transported to the first channel 231 through the connecting hole 233 and discharged from the first opening 21, so that it can be applied to more usage scenarios, and can easily remove larger impurities stuck on both sides of the filter component 3, thereby avoiding damage to the entire purification device, improving safety, and extending the service life.

[0062] See also Figure 1-Figure 3 In some embodiments, the liquid metal nuclear reactor coolant filter device further includes a seal 6 detachably mounted 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 .

[0063] The present application uses a seal 6 that is 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, thereby avoiding corrosion of the connection by the coolant, affecting the service life and safety, and preventing the coolant from leaking out of the reactor, further improving the sealing performance, and also allowing the output shaft to fall as far as possible below the liquid level of the coolant, thereby expanding the scope of use.

[0064] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A liquid metal nuclear reactor coolant filter device, characterized in that: include: A mounting base (1), a housing (2), a filter assembly (3) and a liquid guide assembly (4); The shell (2) is installed in a liquid metal coolant reactor via a mounting seat (1); a first opening (21) and a second opening (22) are provided on the shell (2), and a liquid passage (23) is provided between the first opening (21) and the second opening (22); The liquid passage (23) comprises: a first channel (231) and a second channel (232); a communication hole (233) is provided between the second channel (232) and the first channel (231), the communication hole being 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 communication hole (233) is located on the other side of the filter assembly (3); The liquid guide assembly (4) is mounted on the mounting seat (1), and draws coolant from the first opening (21) into the first channel (231), passes through the filter assembly (3) and the second channel (232), and is discharged from the second opening (22).

2. The liquid metal nuclear reactor coolant filter device according to claim 1, characterized in that: The filter assembly (3) comprises: a carrier (31) and a plurality of filter elements (32); the carrier (31) is detachably mounted in the second channel (232); and the plurality of filter elements (32) are sequentially mounted on the carrier (31).

3. The liquid metal nuclear reactor coolant filter device according to claim 2, characterized in that: The plurality of filter elements (32) are installed in a mutually staggered manner, and a communicating gap is provided between adjacent filter elements (32).

4. The liquid metal nuclear reactor coolant filter device according to claim 2, characterized in that: The filter assembly (3) further comprises a protective net (33) mounted on the carrier (31), wherein the protective net (33) is located on one side or both sides of the plurality of filter elements (32).

5. The liquid metal nuclear reactor coolant filter device according to claim 2, characterized in that: The filter element (32) is a porous structure made of stainless steel fiber felt, glass fiber and / or ceramic particles.

6. The liquid metal nuclear reactor coolant filter device according to claim 1, characterized in that: The liquid metal nuclear reactor coolant filtering device further comprises a gathering component (5) mounted on the shell (2), wherein the gathering component (5) is an electromagnet and / or a permanent magnet, and adsorbs impurities in the coolant to the vicinity of the first opening (21) and / or the second opening (22).

7. The liquid metal nuclear reactor coolant filter device according to claim 1, characterized in that: The shell (2) is suspended and mounted in the liquid metal coolant reactor via a mounting seat (1); the shell (2) is tubular throughout.

8. The liquid metal nuclear reactor coolant filtering device according to claim 7, characterized in that: The first channel (231) is arranged on the axis of the tubular shell (2), and at least one second channel (232) is arranged on the inner periphery of the shell (2); the first channel (231) and the second channel (232) form an n-shaped connection.

9. The liquid metal nuclear reactor coolant filter device according to claim 1, characterized in that: The liquid guide assembly (4) comprises: a motor (41) and a blade (42), wherein the motor (41) is mounted on the mounting seat (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).

10. The liquid metal nuclear reactor coolant filter device according to claim 9, characterized in that: The liquid metal nuclear reactor coolant filtering device further comprises a sealing member (6) detachably mounted in the first channel (231); the sealing member (6) fills the gap between the output shaft of the motor (41) and the first channel (231) and is located above the communicating hole (233).

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