Helium recovery system

Abstract

The invention discloses a helium recovery system, and relates to the technical field of helium recovery, and the helium recovery system comprises a gas source; the inlet end of the filtering device is connected with the outlet end of the gas source; the inlet end of the separating assembly is connected with the outlet end of the filtering device; the inlet end of the purification assembly is connected with the outlet end of the separation assembly; the inlet end of the first storage device is connected with the outlet end of the purification assembly. According to the helium recovery system, effective recovery of helium can be achieved, the recovery efficiency and purity of helium are improved, and the system is safe, reliable, simple and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of helium recovery, and particularly to a helium recovery system. Background Art

[0002] Helium resources are strategic resources related to national security and economic lifelines. It plays an irreplaceable role in many fields, such as high-end equipment manufacturing, aerospace, nuclear reactors, etc. However, the helium resource storage in China is relatively small, with difficulties in exploitation and extraction, and a high degree of external dependence.

[0003] Fusion energy has become the ultimate ideal energy source for human society and is one of the most promising fundamental paths to completely solve the energy crisis. Currently, the rapidly developing technical path is to obtain huge energy through magnetic confinement fusion reactions. The fuels used in the reactions are the hydrogen isotopes deuterium (D) and tritium (T), and the reactions produce neutrons and helium.

[0004] In related technologies, the helium extraction paths mainly rely on the development of natural gas associated resources, industrial waste recycling, etc. For the extraction of helium associated with natural gas, a membrane separation, adsorption dehydrogenation and pressure swing adsorption coupling process is used to extract high-purity helium from natural flash vapor; for industrial waste gas recycling, technologies such as condensation adsorption and membrane separation are used to recover helium from industries such as optical fibers and air conditioners. There is no reliable solution for the recovery of helium after the fusion deuterium-tritium reaction. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a helium recovery system, which can effectively recover helium, improve the recovery efficiency and purity of helium, and the system is safe, reliable, simple and efficient.

[0006] The helium recovery system according to an embodiment of the present invention includes: a gas source; a filtering device, the inlet end of the filtering device is connected to the outlet end of the gas source; a separation component, the inlet end of the separation component is connected to the outlet end of the filtering device; a purification component, the inlet end of the purification component is connected to the outlet end of the separation component; a first storage device, the inlet end of the first storage device is connected to the outlet end of the purification component.

[0007] The helium recovery system according to an embodiment of the present invention realizes the effective recovery of helium by setting a gas source, a filtering device, a separation component, a purification component and a first storage device connected in sequence, improves the recovery efficiency and purity of helium, and the system is safe, reliable, simple and efficient.

[0008] According to the helium recovery system of some embodiments of the present invention, the separation component includes at least two separation devices, and at least two of the separation devices are adapted to be selectively connected in series between the outlet end of the filtering device and the inlet end of the purification component in sequence.

[0009] According to the helium recovery system of some embodiments of the present invention, the separation component further includes a first detection device and a first circulating return branch; wherein, there are two separation devices which are a first separation device and a second separation device connected in sequence, the first circulating return branch is used to selectively connect the outlet end and the inlet end of the second separation device, and the first detection device is arranged at the outlet end of the second separation device and is adapted to control the first circulating return branch to conduct when detecting that the tritium radioactivity dose in the helium exceeds a first set value.

[0010] According to the helium recovery system of some embodiments of the present invention, a first separation control valve is arranged between the outlet end of the first separation device and the inlet end of the second separation device; and / or, a first circulation control valve is arranged in the first circulating return branch; and / or, a second separation control valve is arranged between the outlet end of the second separation device and the inlet end of the purification component.

[0011] According to the helium recovery system of some embodiments of the present invention, the helium recovery system further includes a second storage device, the separation device is provided with a collection port, and the collection port is communicated with the second storage device.

[0012] According to the helium recovery system of some embodiments of the present invention, the collection ports of at least two of the separation devices are all communicated with the inlet end of the second storage device; and / or, a collection control valve is arranged between each separation device and the inlet end of the second storage device.

[0013] According to the helium recovery system of some embodiments of the present invention, the purification component includes at least one purification device, and the purification device is selectively communicated between the outlet end of the separation component and the inlet end of the first storage device.

[0014] According to the helium recovery system of some embodiments of the present invention, the purification component further includes a second detection device; wherein, the purification component includes a main flow path and a purification circulation branch, the main flow path is selectively communicated between the outlet end of the separation component and the inlet end of the first storage device, the purification device is arranged in the purification circulation branch, and the second detection device is arranged in the main flow path and is adapted to control the main flow path and the purification circulation branch to form a circulating purification loop when detecting that the helium purity is lower than a second set value.

[0015] According to some embodiments of the present invention, in the helium recovery system, a first purification control valve is provided upstream of the main flow path where it is connected to the purification circulation branch; and / or, a second purification control valve is provided downstream of the main flow path where it is connected to the purification circulation branch; and / or, a third purification control valve is provided in the purification circulation branch.

[0016] According to some embodiments of the present invention, in the helium recovery system, the purification assembly further includes a buffer tank, and the buffer tank is connected between the outlet end of the separation assembly and the inlet end of the main flow path.

[0017] According to some embodiments of the present invention, the helium recovery system further includes a main control valve, and the main control valve is connected between the outlet end of the gas source and the inlet end of the filtering device.

[0018] According to some embodiments of the present invention, the helium recovery system further includes a compressor, and the compressor is connected between the outlet end of the purification assembly and the inlet end of the first storage device.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein: Figure 1 is a schematic structural diagram of a helium recovery system according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a separation assembly according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a purification assembly according to an embodiment of the present invention.

[0021] Reference Numerals: Helium recovery system 100, Gas source 1, Filtering device 2, Separation assembly 3, Separation device 31, First separation device 311, Second separation device 312, First detection device 32, First circulation return branch 33, First separation control valve 34, First circulation control valve 35, Second separation control valve 36, Purification assembly 4, Purification device 41, Second detection device 42, Main flow path 43, Purification circulation branch 44, First purification control valve 45, Second purification control valve 46, Third purification control valve 47, Buffer tank 48, First storage device 5, Second storage device 6, Collection control valve 61, Main control valve 7, Compressor 8. Detailed Embodiments

[0022] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. 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 the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the transverse direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0025] Reference will be made below to Figures 1 - 3 Describe a helium recovery system 100 according to an embodiment of the present invention. The helium recovery system 100 can effectively recover helium, improve the recovery efficiency and purity of helium, and the system is safe, reliable, simple and efficient.

[0026] As Figures 1 - 3 shown, a helium recovery system 100 according to an embodiment of the present invention includes: a gas source 1, a filtering device 2, a separation assembly 3, a purification assembly 4, and a first storage device 5.

[0027] First of all, it should be noted that helium is generated through magnetic confinement fusion reactions. The fuels used in the reactions are isotopes of hydrogen, deuterium (D) and tritium (T). Neutrons and helium are produced in the reactions. Therefore, there will be various mixed gases after the fusion reactions in the fusion device, mainly consisting of three gases: deuterium, tritium, and helium.

[0028] Gas source 1 is mainly used to store various mixed gases recovered after the fusion reactions in the fusion device, in preparation for helium extraction.

[0029] There may be tiny particles such as dust introduced during the regeneration process of the cryopump in the mixed gases after the fusion reactions. Filter device 2 is mainly used to filter particulate matters such as dust impurities that may exist in the mixed gases in gas source 1. The inlet end of filter device 2 is connected to the outlet end of gas source 1. That is, the mixed gases in gas source 1 can come out from the outlet end and enter the interior of filter device 2 through the inlet end of filter device 2, so as to effectively filter and remove the tiny particulate matters such as dust impurities in the mixed gases. In actual design, filter device 2 can be constructed as a dust filter.

[0030] Separation component 3 is mainly used to separate the filtered mixed gases, separating helium from other gases. The inlet end of separation component 3 is connected to the outlet end of filter device 2. That is, the filtered mixed gases can flow out from the outlet end of filter device 2 and enter the interior of separation component 3 through the inlet end of separation component 3, so as to separate helium from other gases.

[0031] The recovered helium needs to reach a certain purity level to be utilized. Purification component 4 is mainly used to purify the separated helium, improving the purity of helium. The inlet end of purification component 4 is connected to the outlet end of separation component 3. That is, the helium separated by separation component 3 can flow out from the outlet end of separation component 3 and enter the interior of purification component 4 through the inlet end of purification component 4, so as to purify the helium.

[0032] The first storage device 5 is used to store the purified helium. The inlet end of the first storage device 5 is connected to the outlet end of purification component 4. That is, the high-purity helium purified by purification component 4 can flow out from the outlet end of purification component 4 and enter the interior of the first storage device 5 through the inlet end of the first storage component, so as to store the purified and refined helium.

[0033] Thus, through gas source 1, filter device 2, separation component 3, purification component 4, and the first storage device 5 connected in sequence, the effective recovery of helium is achieved, improving the recovery efficiency and purity of helium, and the system is safe, reliable, simple, and efficient.

[0034] The helium recovery system 100 according to an embodiment of the present invention realizes the effective recovery of helium by arranging a gas source 1, a filtering device 2, a separation component 3, a purification component 4, and a first storage device 5 connected in sequence, improving the recovery efficiency and purity of helium, and the system is safe, reliable, simple, and efficient.

[0035] In some embodiments, the separation component 3 includes at least two separation devices 31, and the at least two separation devices 31 are adapted to be selectively connected in series between the outlet end of the filtering device 2 and the inlet end of the purification component 4 in sequence.

[0036] That is to say, the separation device 31 may include two, three or more separation devices 31. The separation device 31 is mainly used for separating helium from other gases. By arranging multiple separation devices 31, multiple separations of helium can be achieved, greatly reducing other gases mixed in helium. Among them, the at least two separation devices 31 are adapted to be selectively connected in series between the outlet end of the filtering device 2 and the inlet end of the purification component 4. That is, the mixed gas coming out of the outlet end of the filtering device 2 can be separated at least twice through the at least two separation devices 31 in sequence to reduce other gases mixed in helium. Then, the separated helium can enter the purification component 4 from the inlet end of the purification component 4 for the next step of purification. And the at least two separation devices 31 can be connected or not connected.

[0037] In actual design, the separation device 31 can be configured as a cryogenic helium separation device, which can utilize the physical property of extremely low boiling point of helium to separate helium from other gases through the phase state difference in an ultra-low temperature environment, which is convenient and efficient.

[0038] In some embodiments, as Figure 2 shown, the separation component 3 further includes a first detection device 32 and a first circulating reflux branch 33.

[0039] Specifically, the first detection device 32 is used to detect the tritium radioactivity dose in the helium separated and purified by the separation component 3. If the detected tritium radioactivity dose is too high, it needs to be separated again through the separation component 3. If the tritium radioactivity dose is qualified, the separated helium can continue to be purified. In actual design, the first detection device 32 can be configured as a radiation metering detector.

[0040] Further, the separation device 31 is two and is the first separation device 311 and the second separation device 312 connected in sequence. The first circulating reflux branch 33 is used to selectively connect the outlet end and the inlet end of the second separation device 312. The first detection device 32 is arranged at the outlet end of the second separation device 312 and is adapted to control the first circulating reflux branch 33 to conduct when the tritium radioactivity dose in the detected helium exceeds a first set value.

[0041] Specifically, as Figure 2 shown, the separation device 31 is composed of two first separation devices 311 and second separation devices 312 connected in sequence. The first separation device 311 is located upstream of the second separation device 312. That is, the first separation device 311 preliminarily separates helium from other gases, preliminarily reducing other gases mixed in helium. The second separation device 312 performs secondary separation on helium and other gases, further reducing other gases mixed in helium, thereby achieving secondary separation, improving the separation effect, and greatly reducing other gases mixed in helium.

[0042] The first circulation reflux branch 33 is used to selectively connect the outlet end and the inlet end of the second separation device 312. That is, the first circulation reflux branch 33 can connect the outlet end and the inlet end of the second separation device 312 so that helium can circulate in the first circulation reflux branch 33 and be continuously purified by passing through the second separation device 312. The first circulation reflux branch 33 can also disconnect the outlet end and the inlet end of the second separation device 312 so that the helium purified by the first separation device 311 can directly flow through the second separation device 312 to the inlet end of the purification component 4.

[0043] As Figure 2 shown, the first detection device 32 is arranged at the outlet end of the second separation device 312 and is adapted to control the first circulation reflux branch 33 to conduct when detecting that the tritium radioactive dose in helium exceeds the first set value. That is to say, the first detection device 32 can detect the tritium radioactive dose in the helium separated and purified by the second separation device 312. The first set value can be 0 or other values. When the first detection device 32 detects that the tritium radioactive dose in the helium flowing out of the outlet end of the second separation device 312 exceeds the first set value, that is, when the tritium radioactive dose is too high and the tritium radioactive dose is unqualified, at this time, the first detection device 32 will control the first circulation reflux branch 33 to conduct so that helium can circulate in the first circulation reflux branch 33 and be continuously purified by passing through the second separation device 312 until the first detection device 32 detects that the tritium radioactive dose in helium is less than or equal to the first set value, that is, when the tritium radioactive dose is qualified, the first circulation reflux branch 33 disconnects, so that the helium with qualified tritium radioactive dose can continue to flow from the outlet end of the second separation device 312 to the inlet end of the purification component 4, and then flow into the interior of the purification component 4 for the next step of purification.

[0044] Thus, through the setting of the first detection device 32 and the first circulation reflux branch 33, the tritium radioactive dose in the helium separated and purified by the separation component 3 is reduced, the qualification of the tritium radioactive dose in the helium separated and purified by the separation component 3 is ensured, the situation of too high tritium radioactive dose in helium is avoided, and thus the purity of helium is improved.

[0045] In some embodiments, a first separation control valve 34 is provided between the outlet end of the first separation device 311 and the inlet end of the second separation device 312 .

[0046] Specifically, if Figure 2 As shown, a first separation control valve 34 is provided between the outlet end of the first separation device 311 and the inlet end of the second separation device 312. The first separation control valve 34 is used to achieve selective communication between the outlet end of the first separation device 311 and the inlet end of the second separation device 312. That is, when the first separation control valve 34 is opened, the outlet end of the first separation device 311 and the inlet end of the second separation device 312 are in a connected state. At this time, the helium flowing out of the outlet end of the first separation device 311 can flow to the inlet end of the second separation device 312 through the first separation control valve 34, and then enter the interior of the second separation device 312 for further separation and purification. When the first separation control valve 34 is closed, the outlet end of the first separation device 311 and the inlet end of the second separation device 312 are in a disconnected state. At this time, the helium flowing out of the outlet end of the first separation control valve 34 cannot flow to the inlet end of the second separation device 312.

[0047] In actual design, the first separation control valve 34 can be set as a tritium-containing metal valve. The tritium-containing metal valve has the characteristics of tolerance to strong radiation, corrosion resistance, high sealing and long life. Due to the radioactivity of tritium gas, it can cause harm to the human body. Therefore, by setting the first separation control valve 34 as a tritium-containing metal valve, tritium gas leakage can be prevented, the safety and reliability of the helium recovery system 100 can be improved, and the first separation control valve 34 can be stably operated under extreme working conditions, effectively extending the service life of the first separation control valve 34 and reducing costs.

[0048] In the actual process of recovering helium, when the first circulation reflux branch 33 is connected, the first separation control valve 34 can be in a closed state to prevent the helium flowing out from the outlet end of the first separation device 311 from entering the first circulation reflux branch 33, affecting the separation and purification of the helium in the previous step, and to prevent excessive gas from clogging the first circulation reflux branch 33, resulting in a pressure increase. Accordingly, when the first circulation reflux branch 33 is disconnected, the first separation control valve 34 can be in an open state, so that the helium separated and purified by the first separation device 311 and the second separation device 312 can flow continuously to the purification device 41, and the helium recovery process is continuously carried out.

[0049] In other embodiments, a first circulation control valve 35 is provided in the first circulation return branch 33 .

[0050] Specifically, if Figure 2As shown, a first circulation control valve 35 is provided in the first circulation return branch 33. The first circulation control valve 35 is used to achieve selective communication between the inlet end and the outlet end of the second separation device 312. In other words, the on and off of the first circulation control valve 35 realizes the conduction and disconnection of the first circulation return branch 33.

[0051] Among them, when the first circulation control valve 35 is opened, the inlet end and the outlet end of the second separation device 312 are in a communicating state, that is, the first circulation return branch 33 is in a conducting state. The helium gas flowing out from the outlet end of the second separation device 312 can flow into the second separation device 312 again from the inlet end of the second separation device 312 and circulate in the first circulation return branch 33. It is continuously purified through the second separation device 312 until the tritium radioactivity dose in the helium gas flowing out from the outlet end of the second separation device 312 is less than or equal to the first set value. Then the first circulation control valve 35 is closed and the first circulation return branch 33 is disconnected. At this time, the helium gas flowing out from the outlet end of the second separation device 312 can continue to flow to the inlet end of the purification component 4.

[0052] In actual design, the first circulation control valve 35 can be set as a tritium-related metal valve. The tritium-related metal valve has the characteristics of strong radiation resistance, corrosion resistance, high sealing performance and long service life. Due to the radioactivity of tritium gas, it will cause harm to the human body. Therefore, by setting the first circulation control valve 35 as a tritium-related metal valve, tritium gas leakage can be prevented, the safety and reliability of the helium recovery system 100 can be improved, and the first circulation control valve 35 can operate stably under extreme working conditions, effectively extending the service life of the first circulation control valve 35 and reducing costs.

[0053] In some other embodiments, a second separation control valve 36 is provided between the outlet end of the second separation device 312 and the inlet end of the purification component 4.

[0054] Specifically, as Figure 2 shown, a second separation control valve 36 is provided between the outlet end of the second separation device 312 and the inlet end of the purification component 4. The second separation control valve 36 is used to achieve selective communication between the outlet end of the second separation device 312 and the inlet end of the purification component 4. That is to say, when the second separation control valve 36 is opened, the outlet end of the second separation device 312 and the inlet end of the purification component 4 are in a communicating state. The helium gas flowing out from the outlet end of the second separation device 312 can flow through the second separation control valve 36 to the inlet end of the purification component 4 and then flow into the purification component 4 for further purification. When the second separation control valve 36 is closed, the outlet end of the second separation device 312 and the inlet end of the purification component 4 are in a disconnected state, and the helium gas flowing out from the outlet end of the second separation device 312 cannot flow to the inlet end of the purification component 4.

[0055] During the actual helium recovery process, when the first circulation return branch 33 is open, the second separation control valve 36 can be in a disconnected state to prevent helium with an unqualified tritium radioactivity dose from flowing out of the outlet of the second separation device 312 from flowing into the purification assembly 4. This ensures that the helium with an unqualified tritium radioactivity dose can only circulate within the first circulation return branch 33 and be continuously separated and purified by the second separation device 312 until the tritium radioactivity dose in the helium reaches a qualified level. Accordingly, when the first circulation return branch 33 is disconnected, the second separation control valve 36 can be in an open state, allowing the helium with a qualified tritium radioactivity dose, after separation and purification by the second separation device 312, to continuously flow to the purification device 41, continuously performing the helium recovery process.

[0056] In actual design, the second separation control valve 36 can be set as a tritium-containing metal valve. The tritium-containing metal valve has the characteristics of tolerance to strong radiation, corrosion resistance, high sealing and long life. Due to the radioactivity of tritium gas, it can cause harm to the human body. Therefore, by setting the second separation control valve 36 as a tritium-containing metal valve, tritium gas leakage can be prevented, the safety and reliability of the helium recovery system 100 can be improved, and the second separation control valve 36 can be stably operated under extreme working conditions, effectively extending the service life of the second separation control valve 36 and reducing costs.

[0057] In some embodiments, the helium recovery system 100 further includes a second storage device 6 , and the separation device 31 is provided with a collecting port, which is connected to the second storage device 6 .

[0058] Specifically, the second storage device 6 is used to store the remaining mixed gases after the helium is separated, facilitating the subsequent recovery of deuterium and tritium. The deuterium and tritium can then be reused for helium production, thereby achieving efficient gas recycling. The collection port provided in the separation device 31 is used to collect the remaining mixed gases after the helium is separated. The collection port is connected to the second storage device 6. Thus, the remaining mixed gases in the collection port can enter the second storage device 6 for storage, preventing the collection port from becoming overfilled with gas.

[0059] In some embodiments, the collection ports of at least two separation devices 31 are both connected to the inlet end of the second storage device 6 .

[0060] That is to say, each separation device 31 is provided with a collecting port, and the collecting port of each separation device 31 is connected to the inlet end of the second storage device 6. In this way, the other mixed gases collected and separated from the helium in the collecting port of each separation device 31 can flow to the inlet end of the second storage device 6, and flow into the second storage device 6 from the inlet end of the second storage device 6, thereby realizing the storage of the mixed gas after the helium is separated by each separation device 31.

[0061] In some other embodiments, a collection control valve 61 is provided between each separation device 31 and the inlet end of the second storage device 6.

[0062] That is to say, the connection or disconnection between each separation device 31 and the inlet end of the second storage device 6 can be achieved by opening and closing the collection control valve 61. When the collection control valve 61 is in the open state, each separation device 31 is connected to the inlet end of the second storage device 6, so that the other mixed gases after helium collection and separation in the collection ports of each separation device 31 can flow to the inlet end of the second storage device 6 and then flow into the second storage device 6; correspondingly, when the collection control valve 61 is in the closed state, each separation device 31 is disconnected from the inlet end of the second storage device 6, so that the other mixed gases after helium collection and separation in the collection ports of each separation device 31 cannot flow to the inlet end of the second storage device 6.

[0063] Specifically, as Figure 2 shown, there are two separation devices 31, the first separation device 311 and the second separation device 312. A collection control valve 61 is provided between each of the two separation devices 31 and the inlet end of the second storage device 6. In this way, the mixed gas after helium removal collected by the first separation device 311 can flow into the second storage device 6 through the opening of the collection control valve 61, and the mixed gas after helium removal collected by the second separation device 312 can also flow into the second storage device 6 through the opening of the collection control valve 61.

[0064] In some embodiments, the purification assembly 4 includes at least one purification device 41, and the purification device 41 is selectively connected between the outlet end of the separation assembly 3 and the inlet end of the first storage device 5.

[0065] That is to say, the purification component 4 may include one, two, three or more purification devices 41. By setting multiple purification devices 41, the purification effect of helium can be improved, and the purity of helium can be greatly enhanced. The purification device 41 is selectively connected between the outlet end of the separation component 3 and the inlet end of the first storage device 5. That is, a purification device 41 is provided between the outlet end of the separation component 3 and the inlet end of the first storage device 5, and the purification device 41 can be connected between the outlet end of the separation component 3 and the inlet end of the first storage device 5. Thus, the helium flowing out from the outlet end of the separation component 3 can flow through the purification device 41, so that the purification device 41 can purify the helium to further enhance the purity of helium. The purified helium then flows to the inlet end of the first storage device 5 and then flows into the first storage device 5. Or, the purification device 41 is not connected between the outlet end of the separation component 3 and the inlet end of the first storage device 5, so that the helium flowing out from the outlet end of the separation component 3 can directly flow to the inlet end of the first storage device 5 and then flow into the first storage device 5.

[0066] Thus, by selectively connecting the purification device 41 between the outlet end of the separation component 3 and the inlet end of the first storage device 5, the selective purification of helium is achieved.

[0067] In actual design, the purification device 41 can be configured as a cryogenic helium purification device. The cryogenic helium purification device can utilize the physical property of the extremely low boiling point of helium to separate helium from other gases through the phase difference in an ultra-low temperature environment, which is convenient and efficient.

[0068] In some embodiments, as Figure 3 shown, the purification component 4 further includes a second detection device 42.

[0069] Specifically, the second detection device 42 is used to detect the purity of the helium separated and purified by the separation component 3. If the detected helium is too low, it needs to be purified again through the purification device 41. If the purity of helium is sufficient, the separated and purified helium can be directly stored in the first storage device 5. In actual design, the second detection device 42 can be configured as an on-line helium purity detector.

[0070] Further, the purification component 4 includes a main flow path 43 and a purification circulation branch path 44. The main flow path 43 is selectively connected between the outlet end of the separation component 3 and the inlet end of the first storage device 5. The purification device 41 is provided in the purification circulation branch path 44. The second detection device 42 is provided in the main flow path 43 and is adapted to control the main flow path 43 and the purification circulation branch path 44 to form a circulating purification loop when the detected helium purity is lower than a second set value.

[0071] Specifically, as Figure 3As shown, the purification component 4 includes a main flow path 43 and a purification circulation branch path 44. The main flow path 43 is selectively connected between the outlet end of the separation component 3 and the inlet end of the first storage device 5. That is, the main flow path 43 can be connected between the outlet end of the separation component 3 and the inlet end of the first storage device 5, so that the helium flowing out of the separation component 3 can flow to the inlet end of the first storage device 5 and then flow into the first storage device 5. Or, the main flow path 43 can be disconnected between the outlet end of the separation component 3 and the inlet end of the first storage device 5, so that the helium flowing out of the separation component 3 cannot flow to the inlet end of the first storage device 5 and then flow into the first storage device 5.

[0072] As Figure 3 shown, a purification device 41 is provided in the purification circulation branch path 44, and a second detection device 42 is provided in the main flow path 43 and is adapted to control the main flow path 43 and the purification circulation branch path 44 to form a circulation purification loop when it detects that the purity of helium is lower than a second set value.

[0073] That is to say, the second detection device 42 can detect the purity of the helium flowing into the main flow path 43 after being separated and purified by the separation component 3. The second set value can be any value greater than 0. When the second detection device 42 detects that the purity of the helium in the main flow path 43 is lower than the second set value, that is, the purity of the helium is too low. At this time, the second detection device 42 can control the main flow path 43 and the purification circulation branch path 44 to be connected to form a circulation purification loop, so that the helium circulates in the circulation purification loop and is continuously purified by the purification device 41 to improve the purity of the helium. At the same time, the second detection device 42 continuously detects the purity of the circulating helium until the second detection device 42 detects that the purity of the helium is greater than or equal to the second set value, that is, when the purity of the helium is sufficient, the circulation purification loop is disconnected, that is, the main flow path 43 and the purification circulation branch path 44 are disconnected, so that the helium reaching the set purity can continue to flow to the inlet end of the first storage device 5 and then flow into the first storage device 5.

[0074] In some embodiments, a first purification control valve 45 is provided upstream of the main flow path 43 where it is connected to the purification circulation branch path 44.

[0075] Specifically, as Figure 3As shown, a first purification control valve 45 is provided upstream of the main flow path 43 where it is connected to the purification circulation branch 44. When the main flow path 43 is disconnected from the purification circulation branch 44, that is, when the circulation purification loop is disconnected, the first purification control valve 45 can be set to the open state so that the helium gas flowing out from the separation component ⑶ can directly flow to the inlet end of the first storage device 5 and then continuously flow into the first storage device 5. When the main flow path 43 is connected to the purification circulation branch 44 to form a circulation purification loop, the first purification control valve 45 can be set to the disconnected state so that the helium gas flowing out from the separation component 3 cannot continue to flow to the first storage device 5. In other words, the helium gas with a purity lower than the second set value detected by the second detection device 42 can circulate in the circulation purification loop for purification, preventing the helium gas flowing out from the separation component 3 from continuing to flow into the circulation purification loop, which may affect the purification effect of the previous step of helium gas and prevent excessive gas from blocking the circulation purification loop, resulting in an increase in air pressure.

[0076] In some other embodiments, a second purification control valve 46 is provided downstream of the main flow path 43 where it is connected to the purification circulation branch 44.

[0077] Specifically, as Figure 3 shown, a second purification control valve 46 is provided downstream of the main flow path 43 where it is connected to the purification circulation branch 44. When the main flow path 43 is disconnected from the purification circulation branch 44, that is, when the circulation purification loop is disconnected, the second purification control valve can be in the open state so that the helium gas flowing out from the separation component 3 and having a purity reaching the second set value detected by the second detection device 42 can directly flow to the inlet end of the first storage device 5 and then continuously flow into the first storage device 5. When the main flow path 43 is connected to the purification circulation branch 44 to form a circulation purification loop, the first purification control valve 45 can be set to the disconnected state to prevent the helium gas with a purity not reaching the second set value detected by the second detection device 42 flowing in the circulation purification loop from flowing to the inlet end of the first storage device 5 and then continuously flowing into the first storage device 5.

[0078] In some other embodiments, a third purification control valve 47 is provided in the purification circulation branch 44.

[0079] Specifically, as Figure 3As shown in the figure, a third purification control valve 47 is provided in the purification circulation branch 44. The selective connection between the purification circulation branch 44 and the main flow path 43 can be realized by opening and closing the third purification control valve 47, that is, the on-off of the circulation purification loop. When the third purification control valve 47 is closed, the purification circulation branch 44 is disconnected from the main flow path 43, that is, the main flow path 43 and the purification circulation branch 44 do not form a circulation purification loop. The helium gas that flows out of the separation component 3 and has been detected by the second detection device 42 to have a purity reaching the second set value can directly flow to the inlet end of the first storage device 5 without flowing through the circulation purification loop, and then continuously flow into the first storage device 5. When the third purification control valve 47 is opened, the purification circulation branch 44 is connected to the main flow path 43 to form a circulation purification loop. The helium gas that flows out of the separation component 3 and has not reached the second set value after being detected by the second detection device 42 can flow into the circulation purification loop to circulate in the circulation purification loop and be continuously purified by the purification device 41 to improve the purity of the helium gas. When the purity of the helium gas reaches the second set value, the third purification control valve 47 can be closed so that the purified helium gas with a purity reaching the second set value can flow out of the circulation purification loop and continue to flow to the inlet end of the first storage device 5, and then continuously flow into the first storage device 5.

[0080] In some embodiments, the first purification control valve 45, the second purification control valve 46, and the third purification control valve 47 can be configured as pneumatic solenoid valves, which have a simple structure and are convenient to control.

[0081] In some embodiments, the purification component 4 further includes a buffer tank 48, and the buffer tank 48 is connected between the outlet end of the separation component 3 and the inlet end of the main flow path 43.

[0082] Specifically, as Figure 3 shown, the purification component 4 further includes a buffer tank 48. The buffer tank 48 is used to temporarily buffer the helium gas purified by the separation component 3. The inlet end of the buffer tank 48 is connected to the outlet end of the separation component 3, and the output end of the buffer tank 48 is connected to the inlet end of the main flow path 43. Thus, the buffer tank 48 is connected between the outlet end of the separation component 3 and the inlet end of the main flow path 43. Therefore, the purified helium gas flowing out of the outlet end of the separation component 3 can flow into the buffer tank 48 to be temporarily buffered in the buffer tank 48 to prevent local pressure from being too high. When the pressure decreases or stabilizes, the helium gas in the buffer tank 48 can continue to flow to the inlet end of the main flow path 43 and then flow into the main flow path 43.

[0083] Thus, by providing the buffer tank 48, the pressure of the helium recovery system 100 can be stabilized, enabling continuous recovery of helium. For example, during the actual helium recovery process, when the first purification control valve 45 is in the closed state, the helium flowing out from the outlet end of the separation assembly 3 cannot continue to flow into the main flow path 43. At this time, to prevent pressure increase caused by excessive local gas, the helium flowing out from the outlet end of the separation assembly 3 can be made to flow into the buffer tank 48, thereby stabilizing the pressure.

[0084] In some embodiments, the helium recovery system 100 further includes a main control valve 7, which is connected between the outlet end of the gas source 1 and the inlet end of the filtration device 2.

[0085] Specifically, as Figure 1 shown, the helium recovery system 100 further includes a main control valve 7, which is used to enable or interrupt the supply of the gas source 1. One end of the main control valve 7 is connected to the outlet end of the gas source 1, and the other end of the main control valve 7 is connected to the inlet end of the filtration device 2. Thus, the main control valve 7 is connected between the outlet end of the gas source 1 and the inlet end of the filtration device 2.

[0086] Thus, when the main control valve 7 is opened, the mixed gas flowing out from the outlet end of the gas source 1 can flow through the main control valve 7 to the inlet end of the filtration device 2, and then flow into the filtration device 2 for dust filtration, thereby realizing a continuous separation and purification process. When the main control valve 7 is closed, the mixed gas flowing out from the outlet end of the gas source 1 cannot flow through the main control valve 7 to the inlet end of the filtration device 2 and flow into the filtration device 2. In this way, it can prevent the subsequent helium from circulating in the first circulation return branch 33 for purification, resulting in excessive gas supply and causing the local pressure of the system to increase.

[0087] For example, during the actual helium recovery process, when the first separation control valve 34 and the second separation control valve 36 are in the closed state and the first circulation control valve 35 is in the open state, helium continuously circulates in the first circulation return branch 33 for purification. At this time, the main control valve 7 can be closed.

[0088] In actual design, the main control valve 7 can be configured as a tritium-containing metal valve.

[0089] In some embodiments, the helium recovery system 100 further includes a compressor 8, which is connected between the outlet end of the purification assembly 4 and the inlet end of the first storage device 5.

[0090] Specifically, as Figure 1 and Figure 3As shown, the helium recovery system 100 further includes a compressor 8. The compressor 8 is used to compress the separated, purified, and refined helium to reduce the occupied volume of the helium. Among them, the inlet end of the compressor 8 is connected to the outlet end of the purification component 4, and the outlet end of the compressor 8 is connected to the inlet end of the first storage device 5. Thus, the compressor 8 is connected between the outlet end of the purification component 4 and the inlet end of the first storage device 5. Therefore, the helium flowing out from the outlet end of the purification component 4 can flow into the compressor 8 from the inlet end of the compressor 8 for compression. Furthermore, the compressed helium can flow out from the compressor 8 and flow into the first storage device 5 from the inlet end of the first storage device 5 to achieve the storage of the compressed helium.

[0091] In actual design, the compressor 8 can be configured as a diaphragm compressor 8.

[0092] In some embodiments, the gas source 1, the filtration device 2, the separation component 3, the purification component 4, the compressor 8, and the first storage device 5 are all connected through double-layer pipes, and the material can be selected as stainless steel 316L to improve the strength and sealing performance of the pipes and prevent tritium leakage.

[0093] The specific working process of the helium recovery system 100 of the present invention is as follows; After the helium recovery system 100 is ready, the main control valve 7 is opened, and the mixed gas flows out from the gas source 1, passes through the main control valve 7, and flows into the filtering device 2 to filter out tiny particles such as possible dust; then it enters the separation assembly 3. The first separation control valve 34 is opened, and the mixed gas sequentially passes through the first separation device 311, the first separation control valve 34, and the second separation device 312 for double purification and separation. After that, the tritium radioactivity dose in the helium is detected by the first detection device 32 to see if it exceeds the first set value. If it does not exceed the first set value, the second separation control valve 36 is opened to enter the further process. If it exceeds the first set value, the main control valve 7 and the first separation control valve 34 are closed, and the first circulation control valve 35 is opened to allow the helium to circulate in the first circulation return branch 33, that is, to circulate and purify between the second separation device 312, the first detection device 32, and the first circulation control valve 35 until the first detection device 32 detects that the tritium radioactivity dose in the helium does not exceed the first set value. Then the main control valve 7 and the first separation control valve are reopened, and the first circulation control valve 35 is closed, so that the purified helium can enter the further process through the second separation control valve 36; after entering the purification assembly 4, the first purification control valve 45 is opened, and the helium sequentially passes through the buffer tank 48, the first purification control valve 45, and reaches the second detection device 42 for purity detection. If the helium purity is higher than or equal to the second set value, the second purification control valve 46 is opened, and the helium passes through the main flow path 43 and the second purification control valve 46 to enter the next process. If the helium purity is lower than the second set value, the third purification control valve 47 is opened, the first purification control valve 45 and the second purification control valve 46 are closed, and the helium circulates in the purification loop to enter the purification device 41 to improve the purity. The helium purity is detected again until the second detection device 42 detects that the helium purity is higher than or equal to the second set value. Then the first purification control valve 45 and the second purification control valve 46 are reopened, and the third purification control valve 47 is closed. The purified helium passes through the main flow path 43 and the second purification control valve 46 to enter the next process; the helium with the set purity enters the compressor 8 for compression and then enters the first storage device 5 for storage. Thus, the helium recovery work after the fusion reaction of the fusion device is completed by the helium recovery system 100. After the helium recovery is completed, the collection control valve 61 can be opened to regenerate the first separation device 311 and the second separation device 312 in the separation assembly 3, allow the mixed gas after helium removal to enter the second storage device 6, and then carry out the deuterium and tritium recovery work.

[0094] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0095] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A helium recovery system, characterized in that, Comprising: Gas source (1); Filter device (2), the inlet end of the filter device (2) is connected to the outlet end of the gas source (1); Separation component (3), the inlet end of the separation component (3) is connected to the outlet end of the filter device (2); Purification component (4), the inlet end of the purification component (4) is connected to the outlet end of the separation component (3); First storage device (5), the inlet end of the first storage device (5) is connected to the outlet end of the purification component (4).

2. The helium recovery system according to claim 1, wherein The separation component (3) includes at least two separation devices (31), and at least two of the separation devices (31) are adapted to be selectively connected in series between the outlet end of the filter device (2) and the inlet end of the purification component (4).

3. The helium recovery system according to claim 2, characterized in that, The separation component (3) further includes a first detection device (32) and a first circulation return branch (33); Wherein, there are two separation devices (31), namely a first separation device (311) and a second separation device (312) connected in sequence, the first circulation return branch (33) is used to selectively communicate the outlet end and the inlet end of the second separation device (312), and the first detection device (32) is arranged at the outlet end of the second separation device (312) and is adapted to control the first circulation return branch (33) to conduct when detecting that the tritium radioactivity dose in helium exceeds a first set value.

4. The helium recovery system according to claim 3, wherein, A first separation control valve (34) is provided between the outlet end of the first separation device (311) and the inlet end of the second separation device (312); And / or, a first circulation control valve (35) is provided in the first circulation return branch (33); And / or, a second separation control valve (36) is provided between the outlet end of the second separation device (312) and the inlet end of the purification component (4).

5. The helium recovery system according to claim 2, wherein It further includes a second storage device (6), the separation device (31) is provided with a collection port, and the collection port is communicated with the second storage device (6).

6. The helium recovery system according to claim 5, wherein The collection ports of at least two of the separation devices (31) are all communicated with the inlet end of the second storage device (6); And / or, a collection control valve (61) is provided between each separation device (31) and the inlet end of the second storage device (6).

7. The helium recovery system according to claim 1, characterized in that, The purification component (4) includes at least one purification device (41), and the purification device (41) is selectively communicated between the outlet end of the separation component (3) and the inlet end of the first storage device (5).

8. The helium recovery system according to claim 7, wherein The purification component (4) further includes a second detection device (42); Wherein, the purification component (4) includes a main flow path (43) and a purification circulation branch (44), the main flow path (43) is selectively communicated between the outlet end of the separation component (3) and the inlet end of the first storage device (5), the purification device (41) is arranged in the purification circulation branch (44), and the second detection device (42) is arranged in the main flow path (43) and is adapted to control the main flow path (43) and the purification circulation branch (44) to form a circulation purification loop when detecting that the helium purity is lower than a second set value.

9. The helium recovery system according to claim 8, wherein, The main flow path (43) is provided with a first purification control valve (45) upstream of the connection with the purification circulation branch path (44); and / or, the main flow path (43) is provided with a second purification control valve (46) downstream of the connection with the purification circulation branch path (44); and / or, the purification circulation branch path (44) is provided with a third purification control valve (47).

10. The helium recovery system according to claim 8, wherein The purification assembly (4) further includes a buffer tank (48), and the buffer tank (48) is connected between the outlet end of the separation assembly (3) and the inlet end of the main flow path (43).

11. The helium recovery system according to claim 1, characterized in that, It further includes a main control valve (7), and the main control valve (7) is connected between the outlet end of the gas source (1) and the inlet end of the filtering device (2).

12. The helium recovery system according to claim 1, characterized in that, It further includes a compressor (8), and the compressor (8) is connected between the outlet end of the purification assembly (4) and the inlet end of the first storage device (5).

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