Molten salt treatment device

Abstract

The embodiment of the invention relates to the technical field of material transportation or storage, in particular to a fused salt treatment device which is used for transferring fused salt from a fused salt storage container and conducting granulation treatment and comprises a shell, a liquid fused salt receiving assembly, a granulation assembly and a fused salt particle receiving part. The shell forms a vacuum chamber; the liquid molten salt receiving assembly is arranged to enable the liquid molten salt in the molten salt storage container to enter the liquid molten salt receiving assembly under the action of pressure difference; the granulation assembly is arranged in the vacuum chamber and is used for manufacturing the liquid molten salt from the liquid molten salt receiving assembly into solid molten salt particles; the molten salt particle receiving part is arranged to be used for receiving the solid molten salt particles manufactured by the granulation assembly. According to the embodiment of the invention, the liquid molten salt is quickly transferred from the molten salt storage container to the liquid molten salt receiving assembly through the pressure difference effect, so that the transfer speed of the molten salt is favorably improved; and the solidification and granulation of the liquid molten salt are realized through the granulation assembly, so that the molten salt is convenient to store and transfer.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of material transportation or storage, and specifically to a molten salt processing device. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] At present, the molten salt electrolysis process is usually used to treat fast reactor spent fuel. The molten salt electrolysis process usually uses LiCl-KCl molten salt as the medium. As the electrolysis process proceeds, the content of impurity ions in the molten salt gradually increases. In order to ensure the smooth progress of the electrolysis process, it is necessary to replace the molten salt with too high impurity ion content in the electrolysis process. At present, when replacing the molten salt, there are problems such as low replacement efficiency and poor durability of the replacement equipment. Summary of the invention

[0004] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0005] The embodiment of the present application provides a molten salt processing device for transferring molten salt from a molten salt storage container and performing granulation processing, and the molten salt processing device comprises: a shell, a liquid molten salt receiving component, a granulation component and a molten salt particle receiving member. The shell forms a vacuum chamber; the liquid molten salt receiving component is configured to allow the liquid molten salt in the molten salt storage container to enter the liquid molten salt receiving component under the action of a pressure difference; the granulation component is disposed in the vacuum chamber and configured to manufacture the liquid molten salt from the liquid molten salt receiving component into solid molten salt particles; the molten salt particle receiving member is configured to receive the solid molten salt particles manufactured by the granulation component.

[0006] The molten salt processing device of the embodiment of the present application can realize the rapid transfer of liquid molten salt from the molten salt storage container to the liquid molten salt receiving component by means of the liquid molten salt receiving component through the pressure difference effect, which is conducive to improving the transportation speed of the molten salt in the electrolysis process. At the same time, the liquid molten salt is solidified and granulated by the granulation component, which is convenient for the storage, transportation and subsequent reuse of the molten salt.

[0007] The molten salt treatment device provided in the embodiments of the present application can realize the rapid transfer of molten salt from the molten salt storage container to the liquid molten salt receiving component without the need for a molten salt pump and a long pipeline. After the molten salt is transferred to the liquid molten salt receiving component, the liquid molten salt can be solidified and granulated through the granulation component, thereby reducing the corrosiveness of the liquid molten salt to the molten salt treatment device and extending the service life of the molten salt treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Other objects and advantages of the present application will become apparent from the following description of the embodiments of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application.

[0009] Figure 1 It is a schematic structural diagram of a molten salt treatment device according to an embodiment of the present application.

[0010] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

[0011] Description of reference numerals:

[0012] 1. Molten salt treatment device;

[0013] 10. Shell; 101. Vacuum chamber; 11. Shell body; 12. Connector; 1201. Connecting channel; 13. Valve; 14. Vacuum extraction interface;

[0014] 20. Liquid molten salt receiving assembly; 21. Molten salt receiving container; 211. Liquid outlet; 22. Pipeline assembly; 221. First pipe section; 222. Second pipe section; 223. Third pipe section; 23. Heating element; 24. Liftable plug; 25. Quick-release flange;

[0015] 30. Granulation assembly; 31. Rotating roller;

[0016] 40. Molten salt particle receiving part;

[0017] 50. Closed shell; 51. Molten salt storage container. DETAILED DESCRIPTION

[0018] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0019] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0020] The inventor of the present application has found that the existing molten salt treatment device usually uses molten salt pumps, valves and pipelines to realize the transportation of molten salt between different devices in the electrolysis process. Since the lowest eutectic point of molten salt is 353°C, and it is extremely hard and highly corrosive after solidification, in the existing molten salt treatment device, molten salt often blocks valves, corrodes transmission pipelines and molten salt pumps, and reduces the transportation speed of molten salt in the electrolysis process and the service life of the molten salt treatment device.

[0021] Based on this, an embodiment of the present application provides a molten salt processing device for transferring molten salt from a molten salt storage container and performing granulation processing. Figure 1 Schematic diagram of the structure of a molten salt treatment device according to an embodiment of the present application. Figure 1 As shown, the molten salt treatment device 1 comprises: a housing 10, a liquid molten salt receiving assembly 20, a granulation assembly 30 and a molten salt particle receiving member 40. The housing 10 forms a vacuum chamber 101; the liquid molten salt receiving assembly 20 is configured to allow the liquid molten salt in the molten salt storage container 51 to enter the liquid molten salt receiving assembly 20 under the action of a pressure difference; the granulation assembly 30 is disposed in the vacuum chamber 101, and is configured to manufacture the liquid molten salt from the liquid molten salt receiving assembly 20 into solid molten salt particles; the molten salt particle receiving member 40 is configured to receive the solid molten salt particles manufactured by the granulation assembly 30.

[0022] The molten salt treatment device 1 of the embodiment of the present application, by providing a liquid molten salt receiving component 20, can utilize the pressure difference to realize the rapid transfer of liquid molten salt from the molten salt storage container 51 to the liquid molten salt receiving component 20, without installing valves and molten salt pumps, avoiding valve blockage and corrosion of the molten salt pump during the molten salt transportation process, reducing the residence time of the liquid molten salt in the molten salt treatment device 1, thereby reducing the corrosiveness of the liquid molten salt to the molten salt treatment device 1, extending the service life of the molten salt treatment device 1, and improving the transportation speed of the liquid molten salt in the electrolysis process. In addition, the solidification and granulation of the liquid molten salt are realized by the granulation component 30, which further reduces the corrosiveness of the liquid molten salt to the molten salt treatment device 1, extends the service life of the molten salt treatment device 1, and facilitates the storage of the molten salt and the subsequent reuse of the molten salt.

[0023] In some embodiments, the housing 10 is provided with a vacuum port 14 in communication with the vacuum chamber 101, and the vacuum port 14 is used to connect with a vacuum device to evacuate the vacuum chamber 101. By evacuating the vacuum chamber 101, a pressure difference is formed between the vacuum chamber 101 and the molten salt storage container 51, and then the liquid molten salt is quickly transported from the molten salt storage container 51 to the liquid molten salt receiving assembly 20 by utilizing the effect of the pressure difference on the liquid molten salt.

[0024] In some embodiments, a plurality of observation windows are formed on the housing 10, and the observation windows are used to observe the transfer process of the liquid molten salt by the liquid molten salt receiving assembly 20, so as to determine the start and end of the liquid molten salt transfer process. In some embodiments, the observation windows can be made of quartz glass.

[0025] like Figure 1 As shown, in some embodiments, the liquid molten salt receiving assembly 20 includes: a molten salt receiving container 21, a pipeline assembly 22 and a heating element 23. The molten salt receiving container 21 is disposed in the vacuum chamber 101 and communicated with the vacuum chamber 101; one port of the pipeline assembly 22 is located in the molten salt storage container 51, and the other port of the pipeline assembly 22 is located directly above the molten salt receiving container 21 and communicated with the vacuum chamber 101, so that the liquid molten salt in the molten salt storage container 51 can enter the pipeline assembly 22 through one port and enter the molten salt receiving container 21 through another port under the action of the pressure difference; the heating element 23 is used to heat the liquid molten salt in the molten salt receiving container 21 to keep it in a liquid state.

[0026] In the embodiment of the present application, the two ports of the pipeline assembly 22 are respectively located in the molten salt storage container 51 and the vacuum chamber 101. When the vacuum chamber 101 is evacuated, the port of the pipeline assembly 22 located in the molten salt storage container 51 and the port of the pipeline assembly 22 located in the vacuum chamber 101 form a pressure difference, so that the liquid molten salt in the molten salt storage container 51 can enter the molten salt receiving container 21 through the pipeline assembly 22 under the action of the pressure difference, thereby eliminating the need to provide a molten salt pump and a valve on the pipeline assembly 22 to achieve the transfer of the liquid molten salt, thereby simplifying the structure of the pipeline assembly 22. At the same time, the heating element 23 is configured to heat the liquid molten salt in the molten salt receiving container 21 to keep it in a liquid state, ensuring that the liquid molten salt has a high fluidity, so that the molten salt in the molten salt receiving container 21 can fall under the action of gravity and flow to the granulation assembly 30 for granulation.

[0027] In some embodiments, the heating element 23 is sleeved on the molten salt receiving container 21 to heat the molten salt receiving container 21 from the outside to the inside to prevent the liquid molten salt from solidifying on the container wall of the molten salt receiving container 21 .

[0028] like Figure 1 As shown, in some embodiments, the heating element 23 is an induction coil. By energizing the induction coil, an induced magnetic field is formed around the induction coil, and the induced magnetic field acts on the molten salt receiving container 21, thereby heating the molten salt receiving container 21. In some embodiments, the molten salt receiving container 21 can be made of metal or graphite so as to form electromagnetic induction with the induction coil and thus be heated.

[0029] In some embodiments, a heat-insulating member is further provided between the molten salt receiving container 21 and the induction coil, and the heat-insulating member is used to reduce heat loss of the molten salt receiving container 21 .

[0030] In some embodiments, the molten salt receiving container 21 is configured to be cylindrical, so that the heating coil can heat the molten salt receiving container 21 and ensure that the liquid molten salt is evenly heated in the molten salt receiving container 21 .

[0031] In some embodiments, the heating temperature of the molten salt receiving container 21 by the heating element 23 is set to be higher than the melting temperature of the molten salt. For example, the heating temperature may be 650°C.

[0032] like Figure 1 As shown, in some embodiments, a liquid outlet 211 is provided at the bottom of the molten salt receiving container 21 ; the granulation assembly 30 faces the liquid outlet 211 .

[0033] In the embodiment of the present application, a liquid outlet 211 is provided at the bottom of the molten salt receiving container 21, so that the liquid molten salt flows to the granulation component 30 through the liquid outlet 211. Compared with allowing the liquid molten salt to flow directly from the port of the pipeline component 22 to the granulation component 30, the embodiment of the present application transfers the liquid molten salt from the pipeline component 22 by providing a molten salt receiving container 21 with a liquid outlet 211 at the bottom, thereby facilitating the control of the flow rate of the liquid molten salt flowing to the granulation component 30 and avoiding the liquid molten salt flowing to the granulation component 30 at a too fast flow rate, which is not conducive to granulation of the granulation component 30.

[0034] In some embodiments, the size of the liquid outlet 211 may be set according to the granulation efficiency of the granulation assembly 30 .

[0035] like Figure 1 As shown, in some embodiments, the liquid molten salt receiving assembly 20 further includes: a liftable plug 24, which is used to close the liquid outlet 211 or adjust the size of the liquid outlet 211. When the liftable plug 24 completely closes the liquid outlet 211, the liquid molten salt in the molten salt receiving container 21 cannot flow downward, so that the start and stop of the process of the liquid molten salt flowing out of the molten salt receiving container 21 is controlled by the liftable plug 24. When the liftable plug 24 is moved a small distance so that it is a small distance away from the liquid outlet 211, the liquid molten salt can flow downward from the gap between the liftable plug 24 and the liquid outlet 211; when the liftable plug 24 is moved a large distance, the liquid molten salt can flow directly downward from the liquid outlet 211; thus, the flow rate of the liquid molten salt flowing out of the molten salt receiving container 21 is adjusted by the liftable plug 24, so as to facilitate the control of the morphology of the molten salt particles in the subsequent granulation process.

[0036] In some embodiments, the liftable plug 24 is configured to be able to be lifted and lowered in the vertical direction. By adjusting the lifting position of the liftable plug 24, the gap size between the liftable plug 24 and the liquid outlet 211 can be adjusted, thereby controlling the flow rate of the liquid molten salt flowing out of the molten salt receiving container 21.

[0037] In some embodiments, the elevating plug 24 may be rod-shaped, and its diameter is set to match the size of the liquid outlet 211. When the elevating plug 24 is fully inserted into the liquid outlet 211, the elevating plug 24 can effectively close the liquid outlet 211 to prevent the liquid molten salt from flowing out of the molten salt receiving container 21.

[0038] In some embodiments, the liftable plug 24 can be made of the same material as the molten salt receiving container 21. For example, the liftable plug 24 can be made of metal or graphite so that it can form electromagnetic induction with the induction coil and be heated to avoid solidification of liquid molten salt due to the low temperature of the liftable plug 24.

[0039] In some embodiments, a plug mounting hole for mounting a liftable plug 24 is formed on the top wall of the shell 10. The diameter of the plug mounting hole is set to match the size of the liftable plug 24. A seal is also provided on the inner edge of the plug mounting hole to ensure that the sealing of the shell 10 is maintained when the liftable plug 24 is raised or lowered.

[0040] In some embodiments, the liftable plug 24 includes a plug body and a rod connected to the plug body. The rod passes through the plug mounting hole of the housing 10 upwardly and out of the housing 10. The lifting mechanism can be connected to the rod to drive the liftable plug 24 to perform lifting movement.

[0041] like Figure 1 As shown, in some embodiments, the granulation assembly 30 includes two rotating rollers 31 arranged in parallel, and the liquid outlet 211 of the molten salt receiving container 21 is aligned with the gap between the two rotating rollers 31, so that the liquid molten salt flowing out of the liquid outlet 211 can enter the gap between the two rotating rollers 31 and be squeezed and solidified.

[0042] In an embodiment of the present application, the liquid outlet 211 is aligned with the gap between the two rotating rollers 31 so that all the liquid molten salt flowing out of the liquid outlet 211 can flow into the gap between the two rotating rollers 31, thereby ensuring that all the liquid molten salt flowing out of the liquid outlet 211 is squeezed and solidified by the granulation assembly 30, thereby improving the solidification efficiency of the liquid molten salt.

[0043] In some embodiments, the rotation direction of the two rotating rollers 31 is set to bidirectional rotation, so as to be more conducive to the molten salt being solidified into particles on the surface of the rotating rollers 31.

[0044] In some embodiments, a plurality of grooves are formed on the surface of the rotating roller 31 , and the liquid molten salt flows into the grooves on the surface of the rotating roller 31 and solidifies in the grooves to form molten salt particles, thereby ensuring the uniformity of the size of the molten salt particles.

[0045] In some embodiments, a cooling medium flow cavity is formed in the rotating roller 31 ; the granulating assembly 30 includes a cooling medium supply member to supply cooling medium into the cooling medium flow cavity to cool the rotating roller 31 .

[0046] In the embodiment of the present application, a cooling medium supply member is provided to provide cooling medium to the cooling medium flow cavity, thereby reducing the temperature of the surface of the rotating roller 31. When the liquid molten salt contacts the surface of the rotating roller 31, the cooled rotating roller 31 can quickly dissipate heat and solidify the liquid molten salt, thereby accelerating the solidification process of the liquid molten salt and improving the solidification efficiency of the liquid molten salt.

[0047] The embodiment of the present application is more conducive to the granulation of molten salt by providing a liftable plug 24, a rotating roller 31 and a cooling medium supply member, which facilitates the subsequent reuse and storage of the molten salt.

[0048] In some embodiments, the rotating roller 31 may be a copper roller. The cooling medium may be water.

[0049] like Figure 1 As shown, in some embodiments, the molten salt storage container 51 is arranged in a closed shell 50; the pipeline assembly 22 includes: a first pipe segment 221, a second pipe segment 222 and a third pipe segment 223 connected in sequence; wherein the second pipe segment 222 passes through the closed shell 50 and is fixedly arranged on the closed shell 50; the first pipe segment 221 is detachably connected to the second pipe segment 222 in the closed shell 50, the first pipe segment 221 enters the molten salt storage container 51 and extends to the bottom wall of the molten salt storage container 51; the third pipe segment 223 is detachably connected to the second pipe segment 222 outside the closed shell 50, the third pipe segment 223 enters the vacuum chamber 101 of the shell 10, and extends to directly above the molten salt receiving container 21.

[0050] In the embodiment of the present application, by passing the second pipe section 222 through the closed shell 50 and being fixedly arranged on the closed shell 50, and making the first pipe section 221 detachably connected to the second pipe section 222 in the closed shell 50, when the molten salt is not transported, the first pipe section 221 and the second pipe section 222 can be disassembled to remove the first pipe section 221 from the molten salt storage container 51, thereby preventing the first pipe section 221 from affecting the original function of the molten salt storage container 51. At the same time, by making the third pipe section 223 detachably connected to the second pipe section 222 outside the closed shell 50, the shell 10 can be isolated from the closed shell 50 when the molten salt is not transported, so as to facilitate the removal of the shell 10 and the like from the closed shell 50 and prevent it from interfering with the process operation in the closed shell 50.

[0051] In some embodiments, the second pipe segment 222 is detachably connected to the first pipe segment 221 and the third pipe segment 223 through the quick-release flange 25. When the first pipe segment 221 and the third pipe segment 223 are separated from the second pipe segment 222, at least one end of the second pipe segment 222 can be sealed.

[0052] In some embodiments, a sealing gasket is further provided on the quick-release flange 25 to ensure the sealing of the connection between the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223, so as to prevent the liquid molten salt from flowing out from the connection between the second pipe segment 222 and the first pipe segment 221 and the third pipe segment 223 during the transportation of the liquid molten salt. For example, the sealing gasket can be made of graphite.

[0053] In some embodiments, the quick release flange 25 may be a KF interface.

[0054] In some embodiments, the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 have the same size, and the pipe diameter is set within 40 mm. Preferably, the pipe diameter is set to 25 mm, which ensures a certain liquid molten salt transport rate while accelerating the liquid molten salt passing rate in the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223, thereby minimizing the heat loss of the molten salt. At the same time, the impact force of the molten salt is used to reduce the residual molten salt in the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223.

[0055] In some embodiments, the first tube segment 221 , the second tube segment 222 , and the third tube segment 223 may be made of metal.

[0056] In some embodiments, the pipeline assembly 22 also includes a preheating element, which is arranged on the outside of the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223, and is configured to preheat the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 before the liquid molten salt is transported, so as to prevent the liquid molten salt from blocking the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 when passing through in the initial stage of the liquid molten salt transportation.

[0057] In some embodiments, the preheating temperature of the preheating element for the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 is set to be higher than the melting point of the liquid molten salt. For example, the preheating temperature may be 600°C.

[0058] In some embodiments, the preheating element may be a heating tape, which is arranged to be wound around the outside of the first pipe segment 221 , the second pipe segment 222 , and the third pipe segment 223 to fully heat the first pipe segment 221 , the second pipe segment 222 , and the third pipe segment 223 .

[0059] In some embodiments, the closed housing 50 may be a glove box, for example, a low-water-oxygen dry glove box.

[0060] In some embodiments, the molten salt storage container 51 may be an electrolytic cell. For example, the electrolytic cell may be an electrolytic cell for an electrolytic process to provide the molten salt to be transported.

[0061] In some embodiments, the top wall of the closed shell 50 and the top wall of the shell 10 are respectively formed with mounting holes for mounting the second pipe segment 222 and the third pipe segment 223. The diameter of the mounting hole is set to match the size of the second pipe segment 222 and the third pipe segment 223. A seal is also provided on the inner edge of the mounting hole to ensure the air tightness of the closed shell 50 and the shell 10.

[0062] like Figure 1As shown, in some embodiments, the shell 10 includes a shell body 11 and a connector 12 connected to the shell body 11 at the bottom of the shell body 11, the shell body 11 forms a vacuum chamber 101, and the connector 12 forms a connecting channel 1201 connected to the vacuum chamber 101; the molten salt particle receiving member 40 is detachably connected to the connector 12; the solid molten salt particles manufactured by the granulation assembly 30 can fall to the connecting channel 1201 under the action of gravity and enter the molten salt particle receiving member 40.

[0063] In the embodiment of the present application, since the shell 10 is configured to include a shell body 11 and a connecting piece 12 connected to the shell body 11 at the bottom of the shell body 11, and the molten salt particle receiving piece 40 is detachably connected to the connecting piece 12, it is convenient to centrally collect the molten salt particles by connecting the molten salt particle receiving piece 40 to the shell 10, and it is convenient to transfer the molten salt particles by disassembling the molten salt particle receiving piece 40 from the shell 10.

[0064] In some embodiments, the connecting member 12 may be configured to be in an inverted trapezoidal shape, so as to collect the molten salt particles produced by the granulation assembly 30 , so that the molten salt particles can smoothly enter the molten salt particle receiving member 40 .

[0065] In some embodiments, the center of the connecting channel 1201 may be aligned with the gap between the two rotating rollers 31 to ensure effective collection of the molten salt particles.

[0066] In some embodiments, the connector 12 may be made of metal.

[0067] like Figure 1 As shown, in some embodiments, the housing 10 further includes a valve 13, which is disposed on the connector 12 and is used to open or close the connection channel to control the start and end of the molten salt particle collection process. At the same time, the valve 13 can also be used to isolate the housing body 11 from the molten salt particle receiving member 40, so that when the vacuum chamber 101 is evacuated, the airtightness of the vacuum chamber 101 is ensured to avoid interference with the liquid molten salt transfer process.

[0068] In some embodiments, the valve 13 may be a ball valve.

[0069] In some embodiments, the molten salt particle receiving component 40 is quickly connected to the connecting component 12 via a ball valve to facilitate replacement of the molten salt particle receiving component 40 .

[0070] In some embodiments, the molten salt particle receiver 40 may be made of metal. The molten salt particle receiver 40 may be a metal container.

[0071] The following describes the process of taking out and treating molten salt using the molten salt treatment device 1 of the present invention in conjunction with specific embodiments.

[0072] 100 kg of LiCl-KCl molten salt is prepared according to the mass ratio of LiCl:KCl=38:45, and the mixed molten salt is placed in a molten salt storage container 51; the molten salt storage container 51 is heated to 600°C to fully mix and melt the molten salt in the molten salt storage container 51 to form a mixed liquid molten salt; the second pipe section 222 is connected to the first pipe section 221 and the third pipe section 223 through the KF interface, wherein the first pipe section 221 extends to the bottom wall of the molten salt storage container 51 in the glove box, and the third pipe section 223 enters the vacuum chamber 101 of the shell 10 and extends to directly above the molten salt receiving container 21.

[0073] Start the heating tape wrapped around the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 to preheat the temperature inside the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 to 400°C; start the induction coil to preheat the molten salt receiving container 21 to 500°C.

[0074] The vacuum port 14 is opened, and the vacuum chamber 101 of the shell 10 is continuously evacuated. Through the observation window, it can be observed that the liquid molten salt continuously flows into the molten salt receiving container 21. After 5 minutes, it is observed that no liquid molten salt flows out of the third pipe segment 223. The vacuum port 14 is closed, and the continuous evacuation of the vacuum chamber 101 of the shell 10 is stopped. The power supply of the heating belt is turned off, and the heating of the first pipe segment 221, the second pipe segment 222 and the third pipe segment 223 is stopped.

[0075] Start the water-cooled rotating copper roller and pass water cooling, move the liftable plug 24 upward, and make the liquid molten salt flow out from the bottom liquid outlet 211 of the molten salt receiving container 21; the outflowing liquid molten salt flows into the gap between the two rotating rollers 31 of the water-cooled rotating copper roller, is squeezed and solidified to form molten salt granules, and falls into the connecting piece 12 and enters the molten salt particle receiving piece 40. After 3 hours, it is observed that no molten salt particles fall anymore, and the water-cooled rotating copper roller and the induction coil are closed.

[0076] After the molten salt particles are cooled, the ball valve is opened, and the molten salt particle receiving part 40 is removed from the connecting part 12. It is observed that most of the molten salt in the molten salt particle receiving part 40 is the size of a fingernail, which meets the requirements for the transportation and reuse of the molten salt. The molten salt particles in the molten salt particle receiving part 40 are transferred to a pre-prepared plastic tank for storing molten salt particles and stored in separate packages.

[0077] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0078] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A molten salt processing device for transferring molten salt from a molten salt storage container and performing granulation processing, characterized in that: The device comprises: a housing, the housing forming a vacuum chamber; a liquid molten salt receiving assembly, configured to allow the liquid molten salt in the molten salt storage container to enter the liquid molten salt receiving assembly under the action of a pressure difference; A granulation component is disposed in the vacuum chamber and is configured to convert the liquid molten salt from the liquid molten salt receiving component into solid molten salt particles; The molten salt particle receiving member is configured to receive the solid molten salt particles produced by the granulation assembly.

2. The molten salt treatment device according to claim 1, characterized in that: The liquid molten salt receiving assembly comprises: A molten salt receiving container is disposed in the vacuum chamber and communicated with the vacuum chamber; A pipeline assembly, one port of which is located in the molten salt storage container, and another port of which is located just above the molten salt receiving container and is in communication with the vacuum chamber, so that liquid molten salt in the molten salt storage container can enter the pipeline assembly through one port and enter the molten salt receiving container through the other port under the action of pressure difference; The heating element is used to heat the liquid molten salt in the molten salt receiving container to keep the liquid molten salt in a liquid state.

3. The molten salt treatment device according to claim 2, characterized in that: The bottom of the molten salt receiving container is provided with a liquid outlet; The granulation assembly faces the liquid outlet.

4. The molten salt treatment device according to claim 3, characterized in that: The liquid molten salt receiving assembly also includes: The plug can be raised and lowered, and is used to close the liquid outlet or adjust the size of the liquid outlet.

5. The molten salt treatment device according to claim 3, characterized in that: The granulation assembly comprises two rotating rollers arranged in parallel, and the liquid outlet is aligned with the gap between the two rotating rollers, so that the liquid molten salt flowing out of the liquid outlet can enter the gap between the two rotating rollers to be squeezed and solidified.

6. The molten salt treatment device according to claim 5, characterized in that: A cooling medium flow cavity is formed in the rotating roller; The granulation assembly includes a cooling medium supply member to supply cooling medium into the cooling medium flow cavity to cool the rotating roller.

7. The molten salt treatment device according to claim 2, characterized in that: The molten salt storage container is arranged in a closed shell; The pipeline assembly comprises: a first pipe section, a second pipe section and a third pipe section connected in sequence; The second pipe section passes through the closed shell and is fixedly disposed on the closed shell; The first pipe section is detachably connected to the second pipe section in the closed shell, and the first pipe section enters the molten salt storage container and extends to the bottom wall of the molten salt storage container; The third pipe section is detachably connected to the second pipe section outside the closed shell, and the third pipe section enters into the vacuum chamber of the shell and extends to just above the molten salt receiving container.

8. The molten salt treatment device according to claim 2, characterized in that: The heating element is an induction coil.

9. The molten salt treatment device according to claim 2, characterized in that: The shell comprises a shell body and a connecting piece connected to the shell body at the bottom of the shell body, the shell body forms the vacuum chamber, and the connecting piece forms a connecting channel communicating with the vacuum chamber; The molten salt particle receiving member is detachably connected to the connecting member; The solid molten salt particles produced by the granulation assembly can fall to the connecting channel under the action of gravity and enter the molten salt particle receiving member.

10. The molten salt treatment device according to claim 9, characterized in that: The housing further comprises a valve, which is arranged on the connecting piece and is used to open or close the connecting passage.

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