A device for removing Po from lead-bismuth solution

Abstract

This invention relates to a device for removing polonium (Po) from a lead-bismuth solution, comprising a high-temperature tank and a gas storage chamber. The high-temperature tank holds the lead-bismuth solution and has a heating device fixedly installed inside. The gas storage chamber is connected to the top of the high-temperature tank via a gas supply pipeline and is used to store inert gas, which is then supplied to the high-temperature tank via the gas supply pipeline. The advantages of this invention are its compact structure, reasonable design, and ability to effectively remove Po from the lead-bismuth solution, i.e., removing polonium at its source, reducing the probability of polonium migration into the atmosphere, minimizing the risk of polonium leakage, improving the safety and reliability of the device, high removal efficiency, reusable protective gas, and low cost.

Description

Technical Field

[0001] This invention relates to the field of lead-bismuth solution treatment equipment, and more specifically to a device for removing Po from lead-bismuth solutions. Background Technology

[0002] 210 Po is an extremely toxic radioactive isotope with a physical half-life of 138.4 days. Its decay involves the release of an alpha particle, and the decay products are stable. 206 Pb decays into alpha particles, which have a very short range in air and cannot penetrate paper or skin, so it does not pose a risk of external radiation exposure to humans. However, it has a strong ionizing ability, and if ingested through inhalation, accidental ingestion, or skin contact, it can lead to internal contamination, poisoning, or acute radiation sickness.

[0003] Lead-bismuth alloy (LBE) possesses advantages such as good chemical stability, low melting point, high boiling point, low reactivity with water and air, and good neutron performance, making it a suitable coolant for fourth-generation reactors and a target material for subcritical systems driven by accelerators. However, in practical applications, the interaction between protons and neutrons and bismuth can lead to the generation of protons and neutrons in the products and coolant. 208-210 Po. The hazardous properties of Po pose serious safety risks to workers, and the generation of radionuclides in the coolant can hinder the development of reactor technology. Therefore, advancements in radionuclide processing technology are of great significance to the development of nuclear energy.

[0004] In existing technologies, there are few descriptions of Po treatment, and most of them focus on the detection and collection of H2Po aerosols. The problem of removing Po from lead-bismuth solutions urgently needs to be solved. Summary of the Invention

[0005] This invention provides an apparatus for removing Po from lead-bismuth solutions, aiming to solve the problems in the prior art.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] An apparatus for removing Po from a lead-bismuth solution includes a high-temperature tank and a gas storage chamber. The high-temperature tank is used to hold the lead-bismuth solution and a heating device is fixedly installed inside it. The gas storage chamber is connected to the top of the high-temperature tank through a gas supply pipeline and is used to store inert gas and deliver the inert gas to the high-temperature tank through the gas supply pipeline.

[0008] The beneficial effects of this invention are: during the removal process, the lead-bismuth solution in the high-temperature tank is heated by a heating device, and the high temperature causes the Po in the lead-bismuth solution to vaporize. At the same time, a protective gas (i.e., an inert gas) is sent into the high-temperature tank through a gas storage chamber. The vaporized Po rises to the upper part of the high-temperature tank along with the protective gas, thereby achieving rapid removal of Po from the lead-bismuth solution with high efficiency.

[0009] This invention features a compact structure and reasonable design, enabling effective removal of polonium from lead-bismuth solutions. It removes polonium at its source, reducing the probability of polonium migration into the atmosphere, minimizing the risk of polonium leakage, and improving the safety and reliability of the device. It also boasts high removal efficiency.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, it also includes a rotary stirrer, which is vertically fixedly installed on the top of the high-temperature tank, with its lower end extending downward into the lower part of the high-temperature tank; the rotary stirrer is provided with an air inlet channel that is open at both the top and bottom, and one end of the air supply pipeline is connected to the upper end of the air inlet channel.

[0012] The advantages of adopting the above-mentioned further scheme are that it has a simple structure and reasonable design. It uses a rotary stirrer to stir the lead-bismuth solution in the high-temperature tank, so that the lead-bismuth solution is heated evenly. At the same time, the protective gas enters the high-temperature tank through the air inlet channel in the rotary stirrer, realizing simultaneous stirring and gas filling. This expands the contact area between the protective gas and the lead-bismuth, which is conducive to the contact between polonium and the protective gas and its discharge from the lead-bismuth solution with the protective gas, resulting in high removal efficiency.

[0013] Furthermore, an air supply valve is fixedly installed on the air supply pipeline.

[0014] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and the gas supply valve can be used to control the opening and closing of the gas supply pipeline, allowing for flexible gas supply.

[0015] Furthermore, the longitudinal cross-section of the heating device is U-shaped.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the heating device has a reasonable shape design, which can make the lead-bismuth solution in the high-temperature tank heated evenly, which is conducive to the rapid removal of Po from the lead-bismuth solution.

[0017] Furthermore, it also includes a gas detection device and an exhaust pipe, one end of which is connected to the top of the high-temperature tank; the gas detection device is fixedly installed on the exhaust pipe.

[0018] The advantages of adopting the above-mentioned further solution are that it has a simple structure and reasonable design. The exhaust pipe can be used to discharge the protective gas and Po that have accumulated in the upper part of the high-temperature tank. At the same time, the gas detection device can be used to detect the composition of the mixed gas discharged from the exhaust pipe to determine whether the Po in the lead bismuth solution has been completely removed.

[0019] Furthermore, it also includes a polonium trapping device for containing alkaline trapping solution, with the other end of the exhaust pipe extending from the top of the polonium trapping device to the lower part inside the polonium trapping device.

[0020] The advantages of adopting the above-mentioned further scheme are that the structure is simple and the design is reasonable. The mixed gas discharged from the exhaust pipe enters the polonium trapping device. The alkaline trapping liquid in the polonium trapping device captures the Po in the mixed gas and effectively absorbs and removes the polonium in the mixed gas. At the same time, the protective gas rises to the upper part of the polonium trapping device.

[0021] Furthermore, it also includes a second gas detection device and a recovery pipeline, one end of which is connected to the top of the polonium trapping device; the second gas detection device is fixedly installed on the recovery pipeline.

[0022] The advantages of adopting the above-mentioned further scheme are that it has a simple structure and reasonable design. It recovers the protective gas accumulated in the upper part of the polonium trap through the recovery pipeline and detects the composition of the protective gas through the gas detection device.

[0023] Furthermore, the recovery pipeline is connected to the exhaust pipeline via a return test pipeline, and a return test valve is fixedly installed on the return test pipeline; the other end of the recovery pipeline is connected to the gas storage chamber, and a recovery valve is fixedly installed on the recovery pipeline at the point where its other end connects to the return test pipeline and the recovery pipeline; an exhaust valve is fixedly installed on the exhaust pipeline at the point where the gas detection device connects to the return test pipeline and the exhaust pipeline.

[0024] The advantages of adopting the above-mentioned further scheme are that it has a simple structure and reasonable design. It uses a recovery pipeline to recover the protective gas accumulated in the upper part of the polonium trap back to the gas storage chamber, realizing the reuse of the protective gas and reducing costs. During this process, the protective gas is detected by the second gas detection device. If the protective gas contains Po, the recovery valve and the exhaust valve are closed, and the return valve is opened to send the protective gas back into the polonium trap for processing until the second gas detection device can no longer detect Po. At this time, the recovery valve can be opened and the return valve can be closed to recover the protective gas back to the gas storage chamber.

[0025] Furthermore, a pressure detector is fixedly installed on the top of the polonium trap and / or the top of the high-temperature tank, respectively.

[0026] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and uses two pressure detectors to detect the pressure in the high-temperature tank and the polonium trap respectively, which is safe and reliable.

[0027] Furthermore, a temperature detector is also fixedly installed on the top of the high-temperature tank.

[0028] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and the temperature inside the high-temperature tank can be detected by a temperature detector. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Heating device; 2. High-temperature tank; 3. Gas supply pipeline; 4. Rotary stirrer; 5. Gas supply valve; 6. Pressure detector; 7. Temperature detector; 8. Gas detection device one; 9. Exhaust valve; 10. Gas storage chamber; 11. Backtest pipeline; 12. Backtest valve; 13. Recovery valve; 14. Gas detection device two; 15. Polonium trap; 16. Alkaline trapping solution; 17. Lead-bismuth solution; 18. Exhaust pipeline; 19. Recovery pipeline. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Example 1

[0037] like Figure 1 As shown, this embodiment provides a device for removing Po from a lead-bismuth solution, including a high-temperature tank 2 and a gas storage chamber 10. The high-temperature tank 2 is used to hold a lead-bismuth solution 17, and a heating device 1 is fixedly installed inside it. The gas storage chamber 10 is connected to the top of the high-temperature tank 2 through a gas supply pipeline 3, and is used to store inert gas and send the inert gas to the high-temperature tank 2 through the gas supply pipeline 3.

[0038] During the removal process, the lead-bismuth solution in the high-temperature tank 2 is heated by the heating device 1. The high temperature causes the Po in the lead-bismuth solution to vaporize. At the same time, a protective gas (i.e., an inert gas) is introduced into the high-temperature tank 2 through the gas storage chamber 10. The vaporized Po rises to the upper part of the high-temperature tank 2 along with the protective gas, thus achieving rapid removal of Po from the lead-bismuth solution with high efficiency.

[0039] Preferably, in this embodiment, the cross-section of the high-temperature tank 2 can be rectangular or circular.

[0040] Based on the above scheme, the protective gas can preferably be an inert gas such as argon or nitrogen.

[0041] In addition, the gas storage chamber 10 is equipped with a gas pump, which can deliver protective gas to the high-temperature tank 2.

[0042] Based on the above scheme, polonium has a melting point of 254℃ and a boiling point of 962℃. During the operation of the device, the temperature of the high-temperature tank is maintained at 900-1000℃.

[0043] This embodiment features a compact structure and reasonable design, enabling effective removal of polonium from lead-bismuth solutions. This means removing polonium at its source, reducing the probability of polonium migration into the atmosphere, minimizing the risk of polonium leakage, improving the safety and reliability of the device, and achieving high removal efficiency.

[0044] Example 2

[0045] Based on Embodiment 1, this embodiment also includes a rotary stirrer 4, which is vertically fixed on the top of the high-temperature tank 2, with its lower end extending downward into the lower part of the high-temperature tank 2; the rotary stirrer 4 is provided with an air inlet channel that is open at both the top and bottom, and one end of the air supply pipe 3 is connected to the upper end of the air inlet channel.

[0046] The scheme has a simple structure and reasonable design. It uses a rotary stirrer 4 to stir the lead-bismuth solution in the high-temperature tank 2, so that the lead-bismuth solution is heated evenly. At the same time, the protective gas enters the high-temperature tank 2 through the air inlet channel in the rotary stirrer 4, realizing simultaneous stirring and gas filling. This expands the contact area between the protective gas and the lead-bismuth, which is conducive to the contact between polonium and the protective gas and its discharge from the lead-bismuth solution with the protective gas, resulting in high removal efficiency.

[0047] The aforementioned rotary stirrer 4 includes an air pipe, a motor, and stirring blades. The air pipe is vertically fixedly installed on the top of the high-temperature tank 2, with both its upper and lower ends open. The corresponding end of the air supply pipe 3 is connected to the upper end of the air pipe. The motor is fixedly installed at the lower end of the air pipe, with its drive end pointing vertically downward and fixedly connected to the stirring blades.

[0048] It should be noted that the above-mentioned motors are preferably waterproof motors.

[0049] When the rotary stirrer 4 is not installed, the corresponding end of the gas supply line 3 extends into the high-temperature tank 2, preferably extending below the liquid surface of the lead-bismuth solution 17, so that the protective gas can quickly carry the vaporized Po to the upper part of the high-temperature tank 2.

[0050] Alternatively, the corresponding end of the gas supply line 3 can be extended into the high-temperature tank 2 and above the liquid surface of the lead-bismuth solution 17, but the efficiency of Po removal in this scheme is not as good as the above scheme.

[0051] Example 3

[0052] Based on the above embodiments, in this embodiment, an air supply valve 5 is fixedly installed on the air supply pipeline 3.

[0053] The scheme has a simple structure and reasonable design. The gas supply valve 5 can control the opening and closing of the gas supply pipeline 3, allowing for flexible gas supply.

[0054] Preferably, in this embodiment, the gas supply valve 5 is a solenoid valve.

[0055] Example 4

[0056] Based on the above embodiments, in this embodiment, the longitudinal cross-section of the heating device 1 is U-shaped.

[0057] The heating device 1 has a reasonable shape design, which can make the lead-bismuth solution in the high-temperature tank 2 heated evenly, which is conducive to the rapid removal of Po from the lead-bismuth solution.

[0058] Example 5

[0059] Based on the above embodiments, this embodiment also includes a gas detection device 8 and an exhaust pipe 18, one end of which is connected to the top of the high-temperature tank 2; the gas detection device 8 is fixedly installed on the exhaust pipe 18.

[0060] The scheme has a simple structure and reasonable design. The exhaust pipe 18 can discharge the protective gas and Po that have accumulated in the upper part of the high-temperature tank 2. At the same time, the gas detection device 8 can detect the composition of the mixed gas discharged from the exhaust pipe 18 to determine whether the Po in the lead bismuth solution has been completely removed.

[0061] It should be noted that the gas detection device 8 mentioned above uses a gas composition detector from the existing technology, and its specific structure and principle will not be described in detail here.

[0062] Example 6

[0063] Based on Example 5, this example also includes a polonium trapping device 15 for containing alkaline trapping solution 16, and the other end of the exhaust pipe 18 extends from the top of the polonium trapping device 15 to the lower part inside the polonium trapping device 15.

[0064] The scheme has a simple structure and reasonable design. The mixed gas discharged from the exhaust pipe 18 enters the polonium trap 15. The alkaline trapping liquid in the polonium trap 15 captures the Po in the mixed gas and effectively absorbs and removes the polonium in the mixed gas. At the same time, the protective gas rises to the upper part of the polonium trap 15.

[0065] Preferably, in this embodiment, the cross-section of the polonium trapping device 15 can be rectangular or circular.

[0066] The polonium trapping device 15 can also be replaced by other devices that can filter and remove polonium, such as rare earth element extraction devices, metal filtration devices, etc.

[0067] The solution inside the polonium trapping device 15 is an alkaline solution, used to absorb and remove polonium from the mixed gas. The reaction formula inside the trapping device is as follows:

[0068] 3Po+6NaOH→2Na2Po+Na2PoO3+3H2O;

[0069] PbPo+4NaOH→Na2Po+Na2PbO2+2H2O.

[0070] Example 7

[0071] Based on Embodiment 6, this embodiment also includes a second gas detection device 14 and a recovery pipeline 19, one end of which is connected to the top of the polonium trapping device 15; the second gas detection device 14 is fixedly installed on the recovery pipeline 19.

[0072] The scheme has a simple structure and reasonable design. It recovers the protective gas that accumulates in the upper part of the polonium trap 15 through the recovery pipeline 19, and detects the composition of the protective gas through the gas detection device 14.

[0073] It should be noted that the gas detection device 214 mentioned above uses a gas composition detector from the prior art, and its specific structure and principle will not be described in detail here.

[0074] If the recovery pipeline 19 is not installed, an exhaust port can be installed on the top of the polonium trap 15 for direct discharge.

[0075] Example 8

[0076] Based on Embodiment 7, in this embodiment, the recovery pipeline 19 is connected to the exhaust pipeline 18 via the return test pipeline 11, and a return test valve 12 is fixedly installed on the return test pipeline 11; the other end of the recovery pipeline 19 is connected to the gas storage chamber 10, and a recovery valve 13 is fixedly installed on the recovery pipeline 19 at the location between its other end and the connection between the return test pipeline 11 and the recovery pipeline 19; an exhaust valve 9 is fixedly installed on the exhaust pipeline 18 at the location between the gas detection device 8 and the connection between the return test pipeline 11 and the exhaust pipeline 18.

[0077] The scheme has a simple structure and reasonable design. It uses the recovery pipeline 19 to recover the protective gas accumulated in the upper part of the polonium trap 15 back to the gas storage chamber 10, realizing the reuse of the protective gas at a low cost. During this process, the protective gas is detected by the gas detection device 2 14. If the protective gas contains Po, the recovery valve 13 and the exhaust valve 9 are closed, and the return valve 12 is opened at the same time. This part of the protective gas is sent back into the polonium trap 15 for processing until the gas detection device 2 14 can no longer detect Po. At this time, the recovery valve 13 can be opened and the return valve 12 can be closed to recover the protective gas back to the gas storage chamber.

[0078] Preferably, in this embodiment, the recovery valve 13, the exhaust valve 9, and the return valve 12 are all preferably solenoid valves.

[0079] Based on the above scheme, the removal rate of polonium from the lead-bismuth solution can be controlled by adjusting the rate at which protective gas is introduced into the high-temperature tank 2 by controlling the gas supply valve 5, while simultaneously adjusting the gas pressure in the high-temperature tank 2 by coordinating with the exhaust valve 9.

[0080] In addition, based on the signal feedback from the pressure sensor, the polonium removal efficiency in the trapping device is controlled by adjusting the inflow and outflow rates of the mixed gas in the trapping device through the control of the exhaust valve 9 and the recovery valve 13. The polonium removal efficiency after passing through the trapping device can be calculated by the polonium concentration ratio in the gas detection device 18 and the gas detection device 24.

[0081] Based on the above scheme, the overall control method for gas in the device pipeline is as follows:

[0082] Based on the feedback from the pressure gauge and temperature gauge in the high-temperature tank, the difference between the inlet and outlet rates of the gas supply valve 5 and the exhaust valve 9 is adjusted to keep the pressure inside the high-temperature tank 2 within a safe range. Based on the concentration of polonium in the mixed gas detected by the gas detection device 8, the overall inlet and outlet rates are adjusted. For example, if the polonium content in the mixed gas exceeds 30%, the overall inlet and outlet rates of the gas supply valve 5 and the exhaust valve 9 are increased. If the polonium content in the mixed gas is less than 5%, the overall inlet and outlet rates of the gas supply valve 5 and the exhaust valve 9 are decreased, thereby reducing the flow rate of gas in the pipeline.

[0083] In addition, the return valve 12 or the recovery valve 13 is opened based on the concentration of polonium in the mixed gas detected by the gas detection device 2 14. If the concentration of polonium in the mixed gas detected by the gas detection device 2 14 is less than 0.01%, the recovery valve 13 is opened, and the gas flows to the gas storage chamber to participate in the next cycle. Otherwise, the recovery valve 13 is closed, and the return valve 12 is opened, so that the mixed gas passes through the polonium trap again to participate in the reaction until the concentration of polonium in the mixed gas is less than 0.01%. Then, the return valve 12 is closed and the recovery valve 13 is opened. Similarly, if the gas detection device 1 8 detects that the concentration of polonium in the mixed gas is less than 0.01%, the exhaust valve 9 and the recovery valve 13 are opened at the same time, so that the gas no longer passes through the polonium trap, thereby improving the overall operating efficiency of the device.

[0084] Furthermore, by comparing the polonium content in gas detection device 18 with the polonium content in gas detection device 214, the polonium removal efficiency in the polonium trapping device can be detected and recorded.

[0085] It should be noted that the alkaline solution inside the polonium collection device 15 is replaced regularly to ensure the polonium removal effect.

[0086] Example 9

[0087] Based on any one of Embodiments 6 to 8, in this embodiment, a pressure detector 6 is fixedly installed on the top of the polonium trapping device 15 and / or the top of the high-temperature tank 2.

[0088] The scheme has a simple structure and reasonable design. It uses two pressure detectors 6 to detect the pressure in the high-temperature tank 2 and the polonium trap 15 respectively, which is safe and reliable.

[0089] It should be noted that the two pressure detectors 6 mentioned above use existing technology, and their specific structures and principles will not be elaborated here.

[0090] Example 10

[0091] Based on Example 9, in this example, a temperature detector 7 is also fixedly installed on the top of the high-temperature tank 2.

[0092] The scheme has a simple structure and reasonable design. The temperature inside the high-temperature tank 2 is detected by the temperature detector 7.

[0093] It should be noted that the temperature detector 7 mentioned above uses existing technology, and its specific structure and principle will not be described in detail here.

[0094] Based on the above scheme, the high-temperature tank 2 is equipped with a pressure detector 6 and a temperature detector 7 to detect the pressure and temperature inside the high-temperature tank 2 in real time, and to control the gas valve to regulate the gas flow and control the heating power to regulate the heating temperature in a timely manner based on the signal feedback.

[0095] The working principle of this invention is as follows:

[0096] During the removal process, the lead-bismuth solution in the high-temperature tank 2 is heated by the heating device 1. The high temperature causes the Po in the lead-bismuth solution to vaporize. At the same time, a protective gas (i.e., an inert gas) is introduced into the high-temperature tank 2 through the gas storage chamber 10. The vaporized Po rises to the upper part of the high-temperature tank 2 along with the protective gas. During this process, the lead-bismuth solution in the high-temperature tank 2 is stirred by the rotary stirrer 4, so that the lead-bismuth solution is heated evenly. At the same time, the protective gas enters the high-temperature tank 2 through the air inlet channel in the rotary stirrer 4, realizing simultaneous stirring and gas filling. This expands the contact area between the protective gas and the lead-bismuth, which is conducive to the contact between polonium and the protective gas and its discharge from the lead-bismuth solution with the protective gas, resulting in high removal efficiency.

[0097] During this process, the protective gas and Po accumulated in the upper part of the high-temperature tank 2 can be discharged through the exhaust pipe 18; at the same time, the composition of the mixed gas discharged from the exhaust pipe 18 is detected by the gas detection device 8 to determine whether the Po in the lead bismuth solution has been completely removed.

[0098] Then, the protective gas accumulated in the upper part of the polonium trap 15 is recovered back into the gas storage chamber 10 through the recovery pipeline 19, realizing the reuse of the protective gas at a low cost. During this process, the protective gas is detected by the gas detection device 2 14. If the protective gas contains Po, the recovery valve 13 and the exhaust valve 9 are closed, and the return valve 12 is opened at the same time to send the protective gas back into the polonium trap 15 for processing until the gas detection device 2 14 can no longer detect Po. At this time, the recovery valve 13 can be opened and the return valve 12 can be closed to recover the protective gas into the gas storage chamber.

[0099] The key point of this invention is:

[0100] 1) A high-temperature evaporation device is used to precisely and efficiently remove polonium from liquid lead bismuth. The high-temperature tank is equipped with a rotating stirrer that can pass through a protective gas, which makes the liquid lead bismuth heat evenly and allows the protective gas to better contact the lead bismuth, thereby removing more polonium.

[0101] 2) After passing through the filtration device, the polonium-containing gas enters the gas detection device. For the mixed gas that does not meet the conditions, it is passed back into the filtration device. The reusable protective gas is reintroduced into the gas storage chamber to participate in the next cycle.

[0102] 3) Based on the data comparison of the pressure detector, temperature detector and two gas detection devices, flexibly adjust different gas valves to regulate the gas pressure inside the instrument and the polonium removal and filtration efficiency.

[0103] The advantages of this invention are:

[0104] 1) High gas utilization efficiency. The protective gas can be reused for polonium collection and filtration.

[0105] 2) Compact structure and high polonium removal rate. Through its compact design, the gas containing radioactive polonium is almost completely removed after passing through the filtration device. The overall system structure is simple and has few components.

[0106] 3) High reliability. Removing polonium at its source reduces the probability of polonium migration into the atmosphere, decreases the risk of polonium leakage, and improves the safety and reliability of the device.

[0107] It should be noted that all electronic components involved in this invention adopt existing technology, and all the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is existing technology.

[0108] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0109] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for removing Po from a lead-bismuth solution, characterized in that: The system includes a high-temperature tank (2) and a gas storage chamber (10). The high-temperature tank (2) is used to hold a lead-bismuth solution (17), and a heating device (1) is fixedly installed inside it. The gas storage chamber (10) is connected to the top of the high-temperature tank (2) through a gas supply pipeline (3) and is used to store inert gas and to deliver the inert gas to the high-temperature tank (2) through the gas supply pipeline (3). It also includes a rotary stirrer (4), which is vertically fixed on the top of the high temperature tank (2), and its lower end extends downward to the lower part inside the high temperature tank (2); the rotary stirrer (4) is provided with an air inlet channel with both the upper and lower ends open, and one end of the air supply pipeline (3) is connected to the upper end of the air inlet channel; It also includes a gas detection device (8) and an exhaust pipe (18), one end of which is connected to the top of the high-temperature tank (2); the gas detection device (8) is fixedly installed on the exhaust pipe (18); It also includes a polonium trapping device (15) for containing alkaline trapping solution (16), the other end of which extends from the top of the polonium trapping device (15) to the lower part of the polonium trapping device (15).

2. The apparatus for removing Po from lead-bismuth solution according to claim 1, characterized in that: An air supply valve (5) is fixedly installed on the air supply pipeline (3).

3. The apparatus for removing Po from lead-bismuth solution according to claim 1, characterized in that: The longitudinal cross-section of the heating device (1) is U-shaped.

4. The apparatus for removing Po from lead-bismuth solution according to claim 1, characterized in that: It also includes a second gas detection device (14) and a recovery pipeline (19), one end of which is connected to the top of the polonium trap (15); the second gas detection device (14) is fixedly installed on the recovery pipeline (19).

5. The apparatus for removing Po from lead-bismuth solution according to claim 4, characterized in that: The recovery pipeline (19) is connected to the exhaust pipeline (18) through the return test pipeline (11), and a return test valve (12) is fixedly installed on the return test pipeline (11); the other end of the recovery pipeline (19) is connected to the gas storage chamber (10), and a recovery valve (13) is fixedly installed on the recovery pipeline (19) at the position between its other end and the connection between the return test pipeline (11) and the recovery pipeline (19); an exhaust valve (9) is fixedly installed on the exhaust pipeline (18) at the position between the gas detection device (8) and the connection between the return test pipeline (11) and the exhaust pipeline (18).

6. The apparatus for removing Po from lead-bismuth solution according to claim 1, characterized in that: Pressure detectors (6) are fixedly installed on the top of the polonium trap (15) and / or the top of the high-temperature tank (2).

7. The apparatus for removing Po from lead-bismuth solution according to claim 6, characterized in that: A temperature detector (7) is also fixedly installed on the top of the high-temperature tank (2).

Images