Chloride molten salt purification apparatus and purification method

Abstract

This application relates to the field of separation using physical or chemical methods, specifically to a chloride molten salt purification device and method. The chloride molten salt purification device includes a container holding assembly, a purification furnace body, a purification furnace cover, a furnace cover moving mechanism, and a purification moving assembly. The container holding assembly holds multiple molten salt containers; the purification furnace cover opens or closes the top opening of the purification furnace body and, together with the purification furnace body, forms a reaction space; the furnace cover moving mechanism drives the purification furnace cover to rise, fall, and rotate, so that the top opening is fully opened or closed; the purification moving assembly moves the container holding assembly within the reaction space, and when the top opening is fully open, the purification moving assembly moves the container holding assembly to protrude beyond the top opening. The chloride molten salt purification device provided by the embodiments of this application can improve the efficiency of chloride molten salt discharge after purification and the efficiency of chloride molten salt feeding.

Description

Technical Field

[0001] The embodiments of this application relate to the field of separation using physical or chemical methods, specifically to a chloride molten salt purification device and purification method. Background Technology

[0002] The statements herein are provided merely as background information in connection with this application and do not necessarily constitute prior art.

[0003] In some cases, to obtain metallic materials, it is necessary to process the corresponding metallic compounds. For example, the corresponding metallic materials can be obtained by electrolytic reduction of the metallic compounds in an electrolytic device.

[0004] In the preparation of corresponding metallic materials using electrolysis, used chloride molten salts can be treated for reuse to save costs. Currently, the technology for treating chloride molten salts for reuse still has many limitations. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] To address the aforementioned issues, embodiments of this application provide a chloride molten salt purification device and purification method.

[0007] In a first aspect, embodiments of this application provide a chloride molten salt purification device, comprising a container holding assembly, a purification furnace body, a purification furnace cover, a furnace cover moving mechanism, and a purification moving assembly. The container holding assembly holds multiple molten salt containers, each containing chloride molten salt to be treated. The purification furnace body has a top opening, and the purification furnace cover is used to open or close the top opening of the purification furnace body. The purification furnace cover and the purification furnace body together form a reaction space for accommodating the container holding assembly. The furnace cover moving mechanism drives the purification furnace cover to rise, fall, and rotate relative to the purification furnace body, so that the top opening is fully opened or fully closed. The purification moving assembly moves the container holding assembly within the reaction space, and when the top opening is fully open, the purification moving assembly can move the container holding assembly to protrude beyond the top opening.

[0008] The chloride molten salt purification equipment provided in this application uses a container holding assembly to hold multiple molten salt containers, thereby enabling the simultaneous purification of more chloride molten salts and improving the purification efficiency. A furnace cover movement mechanism drives the purification furnace cover to rise, fall, and rotate relative to the purification furnace body, fully opening the top opening. A purification moving assembly then moves the container holding assembly to a position protruding from the top opening, facilitating its removal using lifting equipment and improving the efficiency of chloride molten salt discharge after purification. Furthermore, a new container holding assembly can be hoisted through the top opening to cooperate with the purification moving assembly, improving the efficiency of chloride molten salt feeding.

[0009] Secondly, embodiments of this application provide a method for purifying chloride molten salt, which utilizes the chloride molten salt purification equipment provided in the first aspect of this application to remove impurity components from the chloride molten salt. The impurity components include lanthanide chlorides, strontium chloride, and cesium chloride.

[0010] The purification method includes the following steps: S10, injecting molten chloride salt into a molten salt container and placing the molten salt container into a first reaction subspace; S20, heating the first reaction subspace and supplying oxygen to the molten salt container so that the lanthanide chlorides in the molten chloride salt react with oxygen to form a precipitate and chlorine gas; S30, then heating the second reaction subspace so that the temperature of the second reaction subspace is higher than the melting point of the molten chloride salt; S40, moving the molten salt container from the first reaction subspace to the second reaction subspace and cooling the first reaction subspace so that the temperature of the first reaction subspace is lower than the melting point of the molten chloride salt; S50, slowly moving the molten salt container from the second reaction subspace to the first reaction subspace so that the molten chloride salt entering the first reaction subspace in the molten salt container gradually solidifies, so that strontium chloride and cesium chloride can be enriched in the molten chloride salt located in the second reaction subspace and finally separate from the molten chloride salt and solidify.

[0011] The purification method provided in the embodiments of this application involves placing molten salt into the first reaction space of a chloride molten salt purification device. After heating the first reaction space and introducing oxygen into the molten salt to form lanthanide oxide precipitates from lanthanide chlorides, the molten salt container can be transferred to the second reaction space without removing the lanthanide oxide precipitates from the chloride molten salt. After cooling the first reaction space, the removal of strontium chloride and cesium chloride is achieved by moving the molten salt container from the second reaction space to the first reaction space. Therefore, the chloride molten salt purification device provided in the embodiments of this application can remove lanthanide chlorides, strontium chloride, and strontium chloride impurities from chloride molten salt using only one device. This simplifies the removal of impurities from chloride molten salt, reduces purification time, and improves the efficiency of purifying chloride molten salt. Attached Figure Description

[0012] Other objects and advantages of this application will become apparent from the following description of embodiments of this application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of this application.

[0013] Figure 1 This is a cross-sectional schematic diagram of the chloride molten salt purification equipment provided in the embodiments of this application.

[0014] Figure 2 yes Figure 1 A magnified view of a section of the chloride molten salt purification equipment near the oxygen supply components.

[0015] Figure 3 yes Figure 1 A magnified view of a portion of the chloride molten salt purification equipment near the sealing guide assembly.

[0016] Figure 4 yes Figure 1 The diagram shows the structure of the purification furnace body of the chloride molten salt purification equipment when the top opening of the purification furnace body is opened.

[0017] Figure 5 yes Figure 1 The image shows a magnified view of a chloride molten salt purification device near the oxygen supply lifting drive.

[0018] Figure 6 yes Figure 1 A partially enlarged view of the oxygen supply pipe fittings of the chloride molten salt purification equipment is shown.

[0019] Figure 7 yes Figure 1 The diagram shows the structure of the purification furnace body of the chloride molten salt purification equipment.

[0020] Figure 8 yes Figure 1 The diagram shows the structure of the container holding assembly and multiple molten salt containers assembled in the chloride molten salt purification equipment.

[0021] Figure 9 yes Figure 1 A partial enlarged view of the chloride molten salt feed device of the chloride molten salt purification equipment near the rotary conveyor assembly.

[0022] Figure 10 yes Figure 8 The diagram shows the structure of the retaining component when it is engaged with the support positioning part.

[0023] Figure 11 yes Figure 10 The structure shown is a magnified view from another angle.

[0024] Figure 12 yes Figure 1 A partially enlarged view of the purification moving component of the chloride molten salt purification device is shown.

[0025] Figure 13 yes Figure 12 The diagram shows a cross-sectional view of the structure.

[0026] Figure 14 yes Figure 1 The image shows a magnified view of a portion of the chloride molten salt purification equipment near the furnace cover movement mechanism.

[0027] Figure 15 yes Figure 14 The diagram shows the structure of the furnace cover movement mechanism.

[0028] Explanation of reference numerals in the attached figures: 100. Chloride molten salt purification equipment; 1. Molten salt container; 2. Oxygen supply assembly; 21. Oxygen supply fittings; 210. Vent; 22. Oxygen supply lifting drive; 221. Vertical extension; 222. Oxygen supply mounting; 2221. Vertical mounting; 2222. Horizontal mounting; 223. Drive; 23. Flow control. 3. Purification furnace body; 30. Reaction space; 301. First reaction subspace; 302. Second reaction subspace; 303. Top opening; 31. Purification furnace body; 311. First purification furnace section; 3111. First purification shell; 3112. First insulation component; 3113. First heating component; 3114. Cooling component; 3115. First mounting component; 3116. First splicing and mating component; 31161. First positioning hole; 312. Second purification furnace section; 3121. Second purification shell; 3122. Second insulation component; 3123. Second heating component; 3124. Heat insulation component; 31240. Heat insulation channel; 3125. Second mounting component; 3126. Second splicing and mating component; 31261. Second positioning component; 3127. Third splicing and mating component; 32. Purification furnace cover; 321. Purification cover body; 322. Insulation cover; 3201. Oxygen supply through hole; 3202. Receiving cavity; 3203. Cover lifting component; 33. First space temperature measuring component; 34. Second space temperature measuring component; 35. Channel temperature measuring component; 36. Purification furnace base; 361. Purification base plate; 3610. Base plate through hole; 362. Bottom insulation component; 3620. Moving mating through hole; 3621. Groove; 360. Air outlet; 3601. Lifting channel; 363. Fourth splicing component; 3001, First airway; 3002, Second airway; 3003, Airflow channel; 4. Exhaust gas discharge components; 5. Sealing guide assembly; 51. Resilient seal; 511. Sealing ring; 5111. Sealing body; 5112. First extension; 51120. Annular groove; 5113. Second extension; 52. Sealing mount; 521. Channel; 522. Sealing groove; 523. Lubrication groove; 53. Lubricating element; 6. Purification moving component; 61. Support and positioning part; 611. Support body; 6110. Support and positioning component; 612. Support column; 62. Moving insulation component; 63. Purification moving component; 601. Insulated space; 64. Moving rod; 65. Dynamic sealing structure; 7. Chloride molten salt feeding device; 71. Molten salt receiving container; 711. Container body; 712. Discharge part; 713. Control valve; 72. Molten salt suction part; 73. Container holding assembly; 731. Holding part; 7310. Holding hole; 732. Support part; 7320. Positioning fitting part; 733. Holding connection part; 734. Lifting fitting part; 741. Support fitting part; 7410. Support fitting positioning part; 7411. Support fitting body; 742. Rotating part; 743. Moving part; 744. Fitting part; 745. Moving drive part; 746. Rotating drive part; 8. Furnace cover moving mechanism; 81. Moving part; 810. First mating groove; 811. Second mating groove; 812. Guide mating part; 82. Motion drive assembly; 821. Rotation drive unit; 8211. Motor; 8212. Reducer; 822. Rotating part; 823. Threaded mating part; 8231. Mating body; 8232. Mounting part; 824. Fastener; 83. Motion-fitting part; 831. Guide cylinder; 8310. Guide part; 83101. Vertical extension section; 83102. Inclined extension section; 832. Guide connection part; 84. Drive connector; 841. First mounting component; 842. Second mounting component; 843. Reinforcing component; 85. Motion connector; 851. Connecting cylinder; 852. Connector; 86. Lifting component; 87. Fixing bolt; 88. Bolt; 9. Support platform; 90. Lifting channel.

[0029] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0030] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0031] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0032] When preparing metallic uranium using molten chloride as an electrolyte via electrolysis, the molten chloride contains impurities such as lanthanide chlorides, strontium chloride, and cesium chloride. Before reuse, the molten chloride needs to be purified to remove these impurities. Currently, the purification efficiency of molten chloride is low.

[0033] To address the aforementioned issues, embodiments of this application provide a chloride molten salt purification device and purification method.

[0034] See Figure 1 and Figure 4 , Figure 1 This is a cross-sectional schematic diagram of the chloride molten salt purification device 100 provided in an embodiment of this application. Figure 4 yes Figure 1The diagram shows the structure of the purification furnace body 3 of the chloride molten salt purification device 100 when the top opening 303 of the purification furnace body 31 is opened by the purification furnace cover 32. The embodiments of this application provide a chloride molten salt purification device 100, which may include a receiving component holding assembly 73, a purification furnace body 3, a furnace cover moving mechanism 8, and a purification moving assembly 6. The container holding assembly 73 is used to hold multiple molten salt containers 1, which contain chloride molten salt to be treated; the purification furnace body 3 includes a purification furnace body 31 and a purification furnace cover 32. The purification furnace body 31 has a top opening 303, and the purification furnace cover 32 is used to open or close the top opening 303 of the purification furnace body 31. The purification furnace cover 32 and the purification furnace body 31 together form a reaction space 30 for accommodating the container holding assembly 73; the furnace cover moving mechanism 8 is used to drive the purification furnace cover 32 to rise, fall and rotate relative to the purification furnace body 31 so that the top opening 303 is fully opened or fully closed; the purification moving assembly 6 is used to drive the container holding assembly 73 to move in the reaction space 30, and when the top opening 303 is fully opened, the purification moving assembly 6 can drive the container holding assembly 73 to move to protrude from the top opening 303.

[0035] The chloride molten salt purification equipment 100 provided in the embodiments of this application holds multiple molten salt containers 1 through a container holding assembly 73, thereby enabling the simultaneous purification of more chloride molten salts and improving the purification efficiency. The furnace cover movement mechanism 8 drives the purification furnace cover 32 to rise, fall, and rotate relative to the purification furnace body 31, so that the top opening 303 is fully opened. The purification moving assembly 6 then moves the container holding assembly 73 to a position protruding from the top opening 303, facilitating the lifting of the container holding assembly 73 using a hoisting device, thus improving the discharge efficiency of the purified chloride molten salt. Furthermore, a new container holding assembly 73 can be hoisted through the top opening 303 to cooperate with the purification moving assembly 6, improving the feeding efficiency of the chloride molten salt.

[0036] In some embodiments, the chloride molten salt may be lithium chloride and potassium chloride, and the impurity components in the chloride molten salt may include lanthanide chlorides, strontium chloride, and cesium chloride. The molten salt container 1 is, for example, a tubular ceramic crucible.

[0037] See Figure 14 and Figure 15In some embodiments, the furnace cover movement mechanism 8 may include a moving part 81 fixedly connected to the furnace cover body 32, a movement drive assembly 82 fixedly connected to the furnace body 31, and a movement mating part 83 detachably connected to the furnace body 31. The movement mating part 83 is configured to guide the movement of the moving part 81, so that the moving part 81 can rise, fall, and rotate under the driving action of the movement drive assembly 82. In such embodiments, the movement of the moving part 81 is guided by the movement mating part 83, and the moving part 81 is driven by the movement drive assembly, enabling the moving part 81 to rise, fall, and rotate, thereby enabling the moving part 81 to drive the furnace cover body 32 fixedly connected to it to rise, fall, and rotate.

[0038] In some embodiments, the motion drive assembly 82 may include a rotation drive part 821, a rotation part 822, and a threaded engagement part 823 that is threadedly engaged with the rotation part 822. The rotation drive part 821 is used to drive the rotation part 822 to rotate, and the threaded engagement part 823 is rigidly connected to the motion part 81 in a detachable manner. When the threaded engagement part 823 is disconnected from the motion part 81 and the motion engagement part 83 is disconnected from the purification furnace body 31, the purification furnace cover 32 can be lifted upward relative to the purification furnace body 31, the rotation part 822, and the threaded engagement part 823 together with the motion part 81 and the motion engagement part 83 to separate it from the purification furnace body 31.

[0039] When replacing or repairing the purification furnace body 3, it is usually necessary to disassemble and reassemble it. For the purification furnace body 3 used in the hot chamber, due to the radioactivity within the hot chamber, operators cannot directly enter and operate it; the purification furnace body 3 must be moved out of the hot chamber. Since the purification furnace body 3 is typically a single structure, and the purification furnace body 3 used in the hot chamber itself is also radioactive, removing the purification furnace body 3 from the hot chamber requires disassembling and reassembling the entire structure, which is cumbersome. This increases the operator's exposure time to radioactivity and is also detrimental to improving the efficiency of removing lanthanide chlorides from chloride molten salts. The embodiments of this application allow the purification furnace cover 32, along with the moving part 81 and the moving mating part 83, to be lifted upwards relative to the purification furnace body 31, the rotating part 822, and the threaded mating part 823 to separate it from the purification furnace body 31. This facilitates the use of lifting equipment to lift the purification furnace cover 32 away from or into the hot chamber, making maintenance and disassembly easier, thereby improving the efficiency of removing lanthanide chlorides from chloride molten salts.

[0040] In some embodiments, the motion mating part 83 may include a guide cylinder 831 and a guide connecting part 832 for detachably connecting the guide cylinder 831 to the purification furnace body 31; wherein, the guide cylinder 831 is formed with a guide part 8310; the motion part 81 enters the guide cylinder 831, and the motion part 81 forms a guide mating part 812. Through the cooperation of the guide part 8310 and the guide mating part 812, the motion part 81 can move up and down and rotate when the rotating part 822 rotates, so as to drive the purification furnace cover 32 fixedly connected to the motion part 81 to move up and down and rotate. In such an embodiment, through the cooperation of the guide part 8310 and the guide mating part 812, the motion part 81 and the threaded mating part 823 can move up and down and rotate when the rotating part 822 rotates, so that only one driving part (i.e., the rotation driving part 821) is provided and no additional lifting driving part is required, so that the top opening 303 can be completely opened or completely closed.

[0041] In some embodiments, the rotating part 822 is, for example, a screw, and the threaded part 823 can be a nut that is threaded into the screw. In some embodiments, the rotating part 822 and the threaded part 823 can form a ball screw.

[0042] In some embodiments, the guide connection 832 is detachably connected to the purification furnace body 31 by a fixing bolt 87. When the fixing bolt 87 is removed, the guide connection 832 is disconnected from the purification furnace body 31.

[0043] In some embodiments, the guide portion 8310 may be a guide groove, and the guide mating portion 812 enters the guide groove to slide along the guide groove. In such an embodiment, the sliding of the guide mating portion 812 along the guide groove enables the moving portion 81 to rise and fall and rotate when the rotating portion 822 rotates.

[0044] In some embodiments, the guide groove may include a vertical extension 83101 and an inclined extension 83102 connected to the top of the vertical extension 83101. In such an embodiment, when the furnace cover 32 closes the top opening 303 of the furnace body 31, the guide mating part 812 is located at the bottom end of the vertical extension 83101. When it is necessary to open the top opening 303, the rotation drive 821 drives the rotation part 822 to rotate in the first direction. At this time, due to the limiting effect of the vertical extension section 83101 on the guide mating part 812, the moving part 81 and the threaded mating part 823 cannot rotate. They can only rise in the vertical direction with the rotation of the rotation part 822 until the guide mating part 812 enters the inclined extension section 83102 (at this time, the furnace cover 32 rises together with the moving part 81, thereby separating the furnace cover 32 from the furnace body 31). Afterwards, as the rotation part 822 continues to rotate in the first direction, the guide mating part 812 can slide along the inclined extension section 83102, and the moving part 81 and the threaded mating part 823 accordingly perform a spiral upward movement (i.e., rise and rotate simultaneously), thereby exposing the top opening 303. When it is necessary to close the top opening 303 of the purification furnace body 31 using the purification furnace cover 32, the rotation drive 821 drives the rotation part 822 to rotate in a second direction opposite to the first direction. The motion part 81 and the threaded engagement part 823 first perform a spiral descent motion (i.e., descent and rotation are performed simultaneously) until the guide engagement part 812 enters the vertical extension section 83101. The rotation drive 821 continues to drive the rotation part 822 to rotate in the second direction. The motion part 81 and the threaded engagement part 823 descend in the vertical direction until the guide engagement part 812 is located at the bottom end of the vertical extension section 83101. At this time, the purification furnace cover 32 closes the top opening 303 of the purification furnace body 31.

[0045] In some embodiments, the projection of the inclined extension section 83102 on the horizontal plane is an arc, and the central angle corresponding to the arc is greater than 90°, so that when the guide fitting part 812 enters the inclined extension section 83102 and slides along the inclined extension section 83102, the moving part 81 can drive the purification furnace cover 32 to rotate more than 90 degrees, thereby exposing the top opening 303.

[0046] In some embodiments, the end of the moving part 81 facing the rotating part 822 forms a first mating groove 810 and a second mating groove 811 connected to the first mating groove 810. The threaded mating part 823 may include a mating body 8231 and a mounting part 8232 connected to the mating body 8231. The mating body 8231 enters the first mating groove 810, and the mounting part 8232 is detachably connected to the moving part 81 outside the first mating groove 810 by a fastener 824. The rotating part 822 extends out of the threaded mating part 823 and enters the second mating groove 811. In such an embodiment, the mounting part 8232 is detachably connected to the moving part 81 by the fastener 824. When the fastener 824 is removed, the threaded mating part 823 is disconnected from the moving part 81, and the threaded mating part 823 and the rotating part 822 can be separated from the first mating groove 810 and the second mating groove 811 of the moving part 81 in a vertical direction.

[0047] In some embodiments, the fastener 824 may be a bolt.

[0048] In some embodiments, both the mating body 8231 and the mounting portion 8232 are threadedly engaged with the rotating portion 822.

[0049] In some embodiments, the rotation drive unit 821 may include a motor 8211 and a reducer 8212 connected to the motor 8211, and the rotation unit 822 is connected to the reducer 8212 so that the motor 8211 can drive the rotation unit 822 to rotate.

[0050] In some embodiments, the furnace cover movement mechanism 8 may further include a drive connector 84 for fixing the rotation drive unit 821 to the purification furnace body 31. See also Figure 15 The drive connector 84 may include a first mounting member 841, a second mounting member 842, and a reinforcing member 843. The rotation drive part 821 is fixedly mounted below the first mounting member 841, the rotation part 822 extends upward through the first mounting member 841, and the threaded engagement part 823 is threadedly engaged with the rotation part 822 above the first mounting member 841.

[0051] The second mounting member 842 is used to be fixedly connected to the purification furnace body 31, and the first mounting member 841 is fixedly connected to the second mounting member 842; the reinforcing member 843 is used to connect to both the first mounting member 841 and the second mounting member 842 at the same time to enhance the connection strength between the first mounting member 841 and the second mounting member 842.

[0052] In some embodiments, the second mounting member 842 is fixedly connected to the purification furnace body 31 by bolts 88.

[0053] In some embodiments, the furnace cover movement mechanism 8 may further include a movement connector 85 for fixing the movement part 81 to the purification furnace cover body 32. The movement connector 85 may include a connecting cylinder 851 and a connector 852. The movement part 81 enters the connecting cylinder 851 and is fixedly connected to the connecting cylinder 851; the connector 852 is used to fix the connecting cylinder 851 to the purification furnace cover body 32.

[0054] In some embodiments, the furnace cover moving mechanism 8 may further include a lifting member 86 disposed on the moving part 81 for lifting the moving part 81. See also Figure 4 The furnace cover 32 is provided with a cover lifting component 3203. When the threaded mating part 823 is disconnected from the moving part 81 and the moving mating part 83 is disconnected from the furnace body 31, the lifting equipment can lift the furnace cover 32, the moving part 81 and the moving mating part 83 together relative to the furnace body 31 through the lifting component 86 and the cover lifting component 3203, so as to separate them from the furnace body 31.

[0055] See Figure 1 and Figure 2 , Figure 2 yes Figure 1 The diagram shows a partial enlarged view of the chloride molten salt purification device 100 near the oxygen supply component 2. The chloride molten salt purification device 100 may also include the oxygen supply component 2, the exhaust gas discharge component 4, and the sealing guide component 5.

[0056] Oxygen supply component 2 is used to supply oxygen to the molten salt container 1 for containing chloride molten salt, so as to react with at least some of the impurity components in the chloride molten salt to form precipitate and chlorine gas; oxygen supply component 2 includes: oxygen supply pipe 21 and oxygen supply lifting drive component 22 for driving the oxygen supply pipe 21 to move up and down; purification furnace body 3 is capable of regulating the temperature of reaction space 30, and the purification furnace body 3 is configured to form an oxygen supply through hole 3201 for the oxygen supply pipe 21 to enter the reaction space 30; tail gas discharge component 4 is used to discharge chlorine gas in the reaction space 30 to the outside; sealing guide component 5 is disposed in oxygen supply through hole 3201, and sealing guide component 5 is used to form a dynamic seal between oxygen supply pipe 21 and oxygen supply through hole 3201, reduce the friction force on oxygen supply pipe 21 during lifting and lowering movement, and guide oxygen supply pipe 21.

[0057] The chloride molten salt purification device 100 provided in the embodiments of this application can introduce oxygen into the chloride molten salt through the oxygen supply pipe 21, so as to remove the lanthanide chloride from the chloride molten salt by reacting the oxygen with the lanthanide chloride. The chlorine gas generated by the reaction can be discharged from the reaction space 30 through the tail gas discharge device 4. The oxygen supply lifting drive device 22 is used to drive the oxygen supply pipe 21 to move up and down, so that the oxygen supply pipe 21 enters and exits the molten salt container 1. Due to the provision of the sealing guide component 5, a dynamic seal is formed between the oxygen supply pipe 21 and the oxygen supply through hole 3201, which can prevent oxygen and chlorine from leaking from the oxygen supply through hole 3201, and prevent air from entering the reaction space 30 and affecting the reaction. It also reduces the friction force on the oxygen supply pipe 21 during the lifting movement and guides the oxygen supply pipe 21 to prevent the outlet of the oxygen supply pipe 21 from being significantly deviated due to the above-mentioned friction force, thus avoiding interference with the molten salt container 1. When removing lanthanide chlorides using the chloride molten salt purification equipment 100 provided in the embodiments of this application, since oxygen is only introduced into the chloride molten salt through the oxygen supply pipe 21, and the reaction space 30 is heated to the reaction temperature by the purification furnace body 3, the lanthanide chlorides are removed from the chloride molten salt by reacting with the oxygen, thereby improving the efficiency of removing lanthanide chlorides from the chloride molten salt.

[0058] See Figure 3 , Figure 3 yes Figure 1 The diagram shows a partial enlarged view of the chloride molten salt purification device 100 at the sealing guide assembly 5. In some embodiments, the sealing guide assembly 5 includes an elastic seal 51, a sealing mount 52 for mounting the elastic seal 51, and a lubricant 53. The sealing mount 52 is disposed within the oxygen supply through-hole 3201, forming a channel 521 for the passage of the oxygen supply pipe 21, a sealing groove 522 communicating with the channel 521, and a lubrication groove 523 communicating with the channel 521. The elastic seal 51 is disposed within the sealing groove 522 and is configured to abut against the oxygen supply pipe 21 through elastic deformation to achieve dynamic sealing. The lubricant 53 is disposed within the lubrication groove 523 and is configured to contact the oxygen supply pipe 21 to reduce the frictional force experienced by the oxygen supply pipe 21 during lifting and lowering movements and to guide the oxygen supply pipe 21. In this embodiment, the lifting and lowering movement of the oxygen supply pipe 21 causes the elastic sealing element 51 to undergo elastic deformation and come into contact with the oxygen supply pipe 21, thereby forming a dynamic seal between the oxygen supply pipe 21 and the oxygen supply through hole 3201. The lubricating element 53 reduces the friction force on the oxygen supply pipe 21 during the lifting and lowering movement and guides the oxygen supply pipe 21 to avoid significant displacement of the outlet of the oxygen supply pipe 21 due to large friction force, and to avoid interference between the oxygen supply pipe 21 and the molten salt container 1, thereby reducing the efficiency of removing lanthanide chlorides from the chloride molten salt.

[0059] In some embodiments, the sealing mounting component 52 is fixedly connected to the purification furnace body 3.

[0060] In some embodiments, the sealing mount 52 is fixedly connected to the peripheral wall of the oxygen supply through-hole 3201. The resilient seal 51 is capable of forming a dynamic seal between the sealing mount 52 and the oxygen supply fitting 21.

[0061] In some embodiments, the lubricant 53 is made of graphite so that it can lubricate the oxygen supply pipe 21 during its lifting and lowering motion, reduce the friction force on the oxygen supply pipe 21 during its lifting and lowering motion, and also guide the oxygen supply pipe 21 to prevent significant displacement of the outlet of the oxygen supply pipe 21 due to excessive friction.

[0062] See Figure 3 In some embodiments, the resilient seal 51 may include two sealing rings 511 arranged axially along the sealing groove 522. Each sealing ring 511 may include a sealing body 5111, a first extension 5112, and a second extension 5113. The sealing body 5111 forms a gap with the oxygen supply tube 21, the first extension 5112 extends obliquely from one end of the sealing body 5111 away from the other sealing ring 511 toward the other sealing ring 511 to abut against the oxygen supply tube 21, and the second extension 5113 extends from the end of the first extension 5112 toward the sealing body 5111, forming a gap with the sealing body 5111.

[0063] In related technologies, the large contact area between the elastic seal 51 and the oxygen supply pipe 21 results in high friction between them, affecting the raising and lowering of the oxygen supply pipe 21 and reducing the efficiency of removing lanthanide chlorides from chloride molten salt. The embodiments of this application, through the above-described arrangement, allow the elastic seal 51 to contact the oxygen supply pipe 21 only at the connection between its first extension 5112 and second extension 5113, thereby reducing the contact area between them. Furthermore, due to the aforementioned structural arrangement of the first extension 5112 and second extension 5113, the connection between them has greater elasticity, enabling close contact with the oxygen supply pipe 21. This facilitates the raising and lowering of the oxygen supply pipe 21 without affecting the dynamic seal between the sealing mounting member 52 and the corresponding oxygen supply pipe 21, thus improving the efficiency of removing lanthanide chlorides from chloride molten salt.

[0064] In addition, the inclined extension of the first extension 5112 of the two elastic seals 51 can also provide guidance for the oxygen supply tube 21, making it easier for the oxygen supply tube 21 to enter or be pulled out of the elastic seal 51.

[0065] See Figure 3 In some embodiments, the surface of the first extension 5112 facing the sealing body 5111 is recessed in a direction away from the sealing body 5111 to form an annular groove 51120. In such embodiments, the above arrangement makes it easier for the first extension 5112 to deform, thereby facilitating the first extension 5112 to seal the sealing mounting member 52 with the oxygen supply pipe 21.

[0066] See Figure 3 In some embodiments, the sealing bodies 5111 of the two sealing rings 511 abut against each other, and there is a gap between the second extensions 5113 of the two sealing rings 511. In such embodiments, the above-mentioned configuration allows the first extension 5112 and the second extension 5113 to deform to provide space, thereby facilitating the sealing rings 511 to seal between the sealing mounting member 52 and the oxygen supply pipe fitting 21.

[0067] In some embodiments, the height of the sealing body 5111 is greater than the height of the second extension 5113, so that a gap can exist between the second extensions 5113 of the two abutting sealing rings 511.

[0068] See Figure 3 In some embodiments, the cross-section of the sealing body 5111 is a right trapezoid, with the straight and inclined sides of the trapezoid located radially outward and radially inward, respectively. In such embodiments, this arrangement facilitates providing space for the deformation of the first extension 5112 and the second extension 5113, while simultaneously increasing the strength of the sealing body 5111 and preventing displacement of the sealing body 5111 due to deformation.

[0069] In some embodiments, the furnace cover 32 is configured to rotate relative to the furnace body 31 about a rotation axis parallel to the axis of the furnace body 31, thereby opening or closing the top opening 303 of the furnace body 31; the furnace cover 32 forms an oxygen supply through-hole 3201. In such an embodiment, the way the furnace cover 32 opens the top opening 303 of the furnace body 31 facilitates both maintaining the stability of the oxygen supply component 2 and allowing the molten salt container 1 to be placed into or removed from the reaction space 30 through the top opening 303.

[0070] Because the furnace cover 32 rotates around a rotation axis parallel to the axis of the furnace body 31, the oxygen supply lifting drive 22 needs to raise the oxygen supply pipe 21 above the top opening 303 of the furnace body 31 to avoid interference with the rotation of the furnace cover 32. After the molten salt container 1 is placed into the reaction space 30, the oxygen supply lifting drive 22 needs to lower the oxygen supply pipe 21 to the bottom of the molten salt container 1, which results in a longer length for the oxygen supply pipe 21. Thus, even a slight tilt at the oxygen supply through-hole 3201 can cause a significant shift in the outlet of the oxygen supply pipe 21. The structure of the sealing guide component 5 in the embodiments of this application is particularly suitable for dynamic sealing of long oxygen supply pipes 21. It reduces the friction force on the oxygen supply pipes 21 during lifting and lowering and guides the oxygen supply pipes 21 to avoid significant displacement of the outlet of the oxygen supply pipes 21 due to large friction force, and avoids interference between the oxygen supply pipes 21 and the molten salt container 1, thereby reducing the efficiency of removing lanthanide chlorides from the chloride molten salt.

[0071] In some embodiments, the oxygen supply component 2 may be disposed on the furnace cover 32 so that when the furnace cover 32 rotates relative to the furnace body 31, it is not necessary to completely pull the oxygen supply pipe 21 upward from the sealing guide component 5.

[0072] See Figure 4 In some embodiments, the oxygen supply lifting drive 22 is mounted on the furnace cover 32. The oxygen supply lifting drive 22 may include a vertical extension 221, an oxygen supply mounting part 222, and a drive 223. The vertical extension 221 is connected to the furnace cover 32 and extends vertically; the oxygen supply mounting part 222 is used to mount the oxygen supply pipe 21, and the oxygen supply mounting part 222 is slidably connected to the vertical extension 221; the drive 223 is used to drive the oxygen supply mounting part 222 to move vertically relative to the vertical extension 221. In such embodiments, the oxygen supply mounting part 222 is driven to move vertically relative to the vertical extension 221 by the drive part, thereby driving the oxygen supply pipe 21 mounted on the oxygen supply mounting part 222 to move up and down, thereby realizing the lifting and lowering of the oxygen supply pipe 21 and avoiding interference of the oxygen supply pipe 21 with the furnace cover 32.

[0073] See Figure 1 and Figure 5 , Figure 5 yes Figure 1 The diagram shows a partial enlarged view of the chloride molten salt purification device 100 near the oxygen supply lifting drive 22. In some embodiments, the oxygen supply assembly 2 may also include a flow control component 23 for controlling the oxygen flow rate of the oxygen supply pipe 21 in order to adjust the amount of oxygen supplied to the chloride molten salt.

[0074] The oxygen supply mounting component 222 may include a vertical mounting portion 2221 and a horizontal mounting portion 2222 connected to the vertical mounting portion 2221. The vertical mounting portion 2221 is slidably connected to the vertical extension portion 221. A flow control component 23 is disposed on the vertical mounting portion 2221. An oxygen supply pipe 21 is connected to the flow control component 23 and is connected to the horizontal mounting portion 2222, passing downward through the horizontal mounting portion 2222. The section of the oxygen supply pipe 21 located below the horizontal mounting portion 2222 extends vertically. In this embodiment, when the driving component 223 drives the oxygen supply mounting component 222 to move vertically relative to the vertical extension portion 221, it is beneficial for the flow control component 23 and the oxygen supply pipe 21 to remain stable relative to the oxygen supply mounting component 222, thereby preventing loosening at the connection between the flow control component 23 and the oxygen supply pipe 21.

[0075] Flow control component 23 is, for example, a flow meter.

[0076] See Figure 6 , Figure 6 yes Figure 1 The diagram shows a partial enlarged view of the oxygen supply pipe 21 of the chloride molten salt purification device 100. In some embodiments, the lower end of the oxygen supply pipe 21 is closed, and multiple vent holes 210 are provided on the peripheral wall near the lower end of the oxygen supply pipe 21. In such embodiments, because the lower end of the oxygen supply pipe 21 is closed, oxygen is prevented from continuously entering the chloride molten salt from the lower end of the oxygen supply pipe 21 in the form of large bubbles and leaving the molten salt container 1 without sufficient reaction. Since the oxygen in the oxygen supply pipe 21 can slowly enter the chloride molten salt through each vent hole 210, it is convenient for the impurity components in the chloride molten salt to react fully with the oxygen, which is beneficial to improving the reaction rate.

[0077] In some embodiments, the diameter of the vent 210 can be 10-20% of the diameter of the oxygen supply pipe 21, so as to facilitate the slow entry of oxygen in the oxygen supply pipe 21 into the chloride molten salt through each vent 210. For example, the diameter of the oxygen supply pipe 21 can be 16 mm, and the diameter of the vent 210 can be 2.5 mm.

[0078] In some embodiments, the oxygen supply pipe 21 is provided with multiple sets of vent holes in the circumferential direction. Each set of vent holes includes multiple vent holes distributed along the axial direction of the oxygen supply pipe 21, which facilitates the slow entry of oxygen from the oxygen supply pipe 21 into the chloride molten salt through each vent hole 210. For example, the number of vent holes 210 can be 16, divided into 4 groups. The 4 groups of vent holes 210 are evenly spaced along the circumferential direction of the oxygen supply pipe 21, and each group includes 4 vent holes 210 distributed along the axial direction of the oxygen supply pipe 21. In some embodiments, the distance between the centers of two adjacent vent holes 210 in the same group can be 10 mm.

[0079] In some embodiments, the purification furnace body 31 is also configured to adjust the temperature of the reaction space 30.

[0080] In related technologies, at least two separate devices are usually required to remove lanthanide chlorides, strontium chlorides, and cesium chloride impurities from chloride molten salts, which is cumbersome and has low purification efficiency.

[0081] See Figure 1 In some embodiments, the purification furnace body 31 may include a first purification furnace section 311, a second purification furnace section 312, and a purification furnace base 36. The first purification furnace section 311, together with the purification furnace cover 32, forms a first reaction subspace 301, and is configured to heat and cool the first reaction subspace 301. The second purification furnace section 312 and the purification furnace base 36 are together configured to form a second reaction subspace 302, and are configured to heat the second reaction subspace 302. The first reaction subspace 301 and the second reaction subspace 302 together form a reaction space 30, and the purification moving component 6 can drive the molten salt container 1 to move in the first reaction subspace 301 and the second reaction subspace 302.

[0082] In this embodiment, the first purification furnace section 311 is configured to heat the first reaction subspace 301, thereby adjusting the temperature of the first reaction subspace 301 to a level suitable for the formation of lanthanide oxide precipitates and chlorine gas from the lanthanide chlorides in the chloride molten salt in the molten salt container 1, thus removing lanthanide chlorides within the first reaction subspace 301. Subsequently, the purification moving component 6 can be used to move the molten salt container 1 from the first reaction subspace 301 to the second reaction subspace 302. The first purification furnace section 311 cools the first reaction subspace 301, while the second purification furnace section 312 heats the second reaction subspace 302, ensuring that the temperature of the first reaction subspace 301 is below the melting point of the chloride molten salt and the temperature of the second reaction subspace 302 is above the melting point of the chloride molten salt. The molten salt is determined by the melting point of the molten salt. The purification moving component 6 moves the molten salt container 1 from the second reaction subspace 302 to the first reaction subspace 301. During the movement, the chloride molten salt that enters the lower-temperature first reaction subspace 301 in the molten salt container 1 gradually solidifies, allowing strontium chloride and cesium chloride to accumulate in the chloride molten salt located in the second reaction subspace 302 and temporarily unsolidified, and eventually separate from the chloride molten salt, thus removing strontium chloride and cesium chloride. Therefore, the chloride molten salt purification equipment 100 provided by the embodiments of this application can remove lanthanide chlorides, strontium chloride, and strontium chloride impurities from chloride molten salt using only one device, which simplifies the removal operation of impurities in chloride molten salt, reduces purification time, and improves the efficiency of purifying chloride molten salt.

[0083] In some embodiments, see Figure 7 The chloride molten salt purification equipment 100 may also include a dynamic sealing structure 65, which is disposed on the purification furnace base 36 so that the purification moving component 6 can achieve dynamic sealing with the purification furnace base 36.

[0084] In some embodiments, the first purification furnace section 311 and the second purification furnace section 312 are detachably connected, and the second purification furnace section 312 and the purification furnace base 36 are detachably connected, so that the first purification furnace section 311 and the second purification furnace section 312 can be removed separately, thereby facilitating the disassembly and individual repair of the problematic first purification furnace section 311 and / or the second purification furnace section 312, which helps to reduce the difficulty of repair and shortens the time for operators to replace or repair the first purification furnace section 311 and the second purification furnace section 312.

[0085] In some embodiments, the first reaction subspace 301 is located above the second reaction subspace 302. The molten salt container 1 can be placed in the first reaction subspace 301. Oxygen is injected into the molten salt container 1 located in the first reaction subspace 301 through the oxygen supply component 2. The temperature of the first reaction subspace 301 is adjusted to be suitable for the oxygen to react with the lanthanide chlorides in the chloride molten salt in the molten salt container 1 to form lanthanide oxide precipitates and chlorine gas, so as to remove the lanthanide chlorides in the chloride molten salt within the first reaction subspace 301.

[0086] In some embodiments, the first purification furnace section 311 is supported by the second purification furnace section 312. The first purification furnace section 311 is configured to be lifted upward relative to the second purification furnace section 312 after the detachable connection is released, so as to facilitate the separation of the first purification furnace section 311 from the second purification furnace section 312 by hoisting, thereby facilitating the disassembly, assembly, and maintenance of the purification furnace body 31. In such embodiments, the first purification furnace section 311 and the second purification furnace section 312 are spliced ​​together. In the embodiments of this application, splicing two components means that one component is placed or stacked on top of another component, supported by the other component, and the component on top can move vertically upward under the action of external force to separate from the component below. In some embodiments, the two spliced ​​components can be positioned by respectively providing vertically extending positioning holes and vertically extending positioning pins; or by respectively providing vertically extending grooves or protrusions.

[0087] In some embodiments, a first splicing fitting 3116 is formed at the lower end of the first purification furnace section 311, and a second splicing fitting 3126 is formed at the upper end of the second purification furnace section 312 facing the first splicing fitting 3116. In such embodiments, the splicing of the first purification furnace section 311 and the second purification furnace section 312 can be achieved by the cooperation of the first splicing fitting 3116 and the second splicing fitting 3126 which are arranged facing each other.

[0088] In some embodiments, the first splicing mating part 3116 and the second splicing mating part 3126 have a flange structure, which facilitates increasing the contact area and helps improve the stability of the splicing.

[0089] In some embodiments, the second splicing member 3126 forms a second positioning member 31261, and the first splicing member 3116 correspondingly forms a first positioning hole 31161. When the first purification furnace section 311 is hoisted onto the second purification furnace section 312, the second positioning member 31261 can enter the first positioning hole 31161 to circumferentially position the first purification furnace section 311 and the second purification furnace section 312, preventing circumferential relative rotation between the first purification furnace section 311 and the second purification furnace section 312. In some embodiments, the second positioning member 31261 can be a stud fixed to the second splicing member 3126, or the stud can be fastened using a nut.

[0090] In some embodiments, a first splicing mating member 3116 is formed on a first purification shell 3111, and a second splicing mating member 3126 is formed on a second purification shell 3121. A first thermal insulation member 3112 is connected to the first purification shell 3111, and a second thermal insulation member 3122 is connected to the second purification shell 3121.

[0091] In some embodiments, the second purification furnace section 312 is supported by the purification furnace base 36 and is configured to be lifted upward relative to the purification furnace base 36 to separate it from the purification furnace base 36, so as to facilitate the separation of the second purification furnace section 312 from the purification furnace base 36 by hoisting, thereby facilitating the maintenance of the second purification furnace section 312.

[0092] The lower end of the second purification furnace section 312 forms a third splicing component 3127, and the upper end of the purification furnace base 36 forms a fourth splicing component 363 facing the third splicing component 3127. In this embodiment, the splicing of the second purification furnace section 312 and the purification furnace base 36 can be achieved by the cooperation of the third splicing component 3127 and the fourth splicing component 363 which are arranged facing each other.

[0093] In some embodiments, the third splicing mating component 3127 and the fourth splicing mating component 363 have flange structures, which facilitates increasing the contact area and improves the stability of the splicing. The structures of the third splicing mating component 3127 and the fourth splicing mating component 363 may be the same as or similar to the structures of the first splicing mating component 3116 and the second splicing mating component 3126, respectively, and will not be described in detail here.

[0094] See Figure 1 and Figure 7 In some embodiments, the chloride molten salt purification equipment 100 may further include a support platform 9, a purification furnace base 36 disposed on the support platform 9, and lifting channels 3601 and 90 respectively provided on the purification furnace base 36 and the support platform 9; the purification moving component 6 is configured to enter the reaction space 30 through the lifting channels 3601 and 90. The purification moving component 6 is connected to the support platform 9; the support platform 9, the purification furnace base 36, and the purification moving component 6 can be lifted apart together. In such an embodiment, the purification furnace base 36 is disposed on the support platform 9 so that the purification moving component 6 can enter the reaction space 30 through the lifting channel 90, facilitating the lifting and lowering of the purification moving component 6; at the same time, the support platform 9, the purification furnace base 36, and the purification moving component 6 can be lifted apart together, facilitating the maintenance and replacement of the purification furnace base 36 and the purification moving component 6.

[0095] In some embodiments, the purification moving component 6 and the purification furnace base 36 are both fixed to the support platform 9 so that the support platform 9, the purification furnace base 36 and the purification moving component 6 can be lifted off together.

[0096] See Figure 1 , Figure 2 and Figure 7 , Figure 7 yes Figure 1The schematic diagram of the purification furnace body 3 of the chloride molten salt purification equipment 100 shown illustrates that, in some embodiments, the first purification furnace section 311 may include a first purification shell 3111, a first insulation member 3112, a first heating member 3113, and a cooling member 3114. The first insulation member 3112 is disposed within the first purification shell 3111, forming a first reaction subspace 301 with a heat-insulating function. The first heating member 3113 is disposed within the first insulation member 3112 and is used to heat the first reaction subspace 301 so that the temperature of the first reaction subspace 301 is suitable for oxygen to react with lanthanide chlorides in the chloride molten salt in the molten salt container 1 to form lanthanide oxide precipitates and chlorine gas. The cooling member 3114 is disposed within the first reaction subspace 301 and is used to cool the first reaction subspace 301 so that the temperature of the first reaction subspace 301 rapidly decreases to below the melting point of the chloride molten salt. In this embodiment, the first heating element 3113 heats the first reaction subspace 301 to a temperature suitable for oxygen to react with lanthanide chlorides in the chloride molten salt to form lanthanide oxide precipitates and chlorine gas, thereby facilitating the removal of lanthanide chlorides from the chloride molten salt within the first reaction subspace 301. The cooling element 3114 cools the first reaction subspace 301, increasing its cooling rate. This, in turn, shortens the cooling time of the first reaction subspace 301 and improves the purification rate of the chloride molten salt when using the temperature difference between the first reaction subspace 301 and the second reaction subspace 302 to remove strontium chloride and strontium chloride from the chloride molten salt.

[0097] In some embodiments, the cooling element 3114 may be a spiral tube through which a cooling medium flows to cool the first reaction subspace 301. The cooling medium may be, for example, cooling water.

[0098] In some embodiments, the cooling element 3114 can cool the temperature of the first reaction subspace 301 to 270°C, at which temperature the chloride molten salt can be solidified while reducing the time required to cool the first reaction subspace 301.

[0099] See Figure 1 and Figure 7In some embodiments, the second purification furnace section 312 may include a second purification shell 3121, a second heat insulation member 3122, a second heating member 3123, and a heat insulation member 3124. The second purification shell 3121 is connected to the first purification shell 3111; the second heat insulation member 3122 is disposed inside the second purification shell 3121, and the second heat insulation member 3122 forms a second reaction subspace 302 with a heat insulation function; the second heating member 3123 is disposed in the second heat insulation member 3122 and is used to heat the second reaction subspace 302 so that the temperature of the second reaction subspace 302 is higher than the melting point of the chloride molten salt, thereby keeping the chloride molten salt in the second reaction subspace 302 in a molten state. A heat insulation element 3124 is disposed between the first heat insulation element 3112 and the second heat insulation element 3122 to reduce heat transfer between the first reaction subspace 301 and the second reaction subspace 302, thereby improving the heating and cooling efficiency of the first reaction subspace 301 and the heating efficiency of the second reaction subspace 302. The heat insulation element 3124 also forms a heat-insulating channel 31240 connecting the first reaction subspace 301 and the second reaction subspace 302, enabling the purification moving assembly 6 to move the molten salt container 1 through the heat-insulating channel 31240 between the first reaction subspace 301 and the second reaction subspace 302.

[0100] In some embodiments, the first heating element 3113 and the second heating element 3123 adopt resistance heating, and the heating rate is not less than 5°C / min, so as to reduce the heating time and improve the efficiency of chloride molten salt purification.

[0101] In some embodiments, the second heating element 3123 can heat the temperature of the second reaction subspace 302 to 350°C. At this temperature, it is possible to ensure that the chloride molten salt does not solidify, while also reducing the energy required to heat the second reaction subspace 302.

[0102] In some embodiments, the thickness of the insulation element 3124 may be 70 mm to minimize heat transfer between the first reaction subspace 301 and the second reaction subspace 302.

[0103] In some embodiments, the inner diameter of the heat insulation channel 31240 is smaller than the inner diameter of the first reaction subspace 301 and the second reaction subspace 302, so as to reduce the heat transfer between the first reaction subspace 301 and the second reaction subspace 302 through the heat insulation channel 31240.

[0104] See Figure 7In some embodiments, the second purification housing 3121 is connected to the first purification housing 3111 below the first purification housing 3111; the purification moving assembly 6 is configured to drive the molten salt container 1 to move up and down through the heat insulation channel 31240. In such embodiments, the above configuration enables the purification moving assembly 6 to move the molten salt container 1 in the first reaction subspace 301 and the second reaction subspace 302, so that the molten salt container 1 can be in different temperature environments during the removal of strontium chloride and cesium chloride, thereby facilitating the removal of strontium chloride and cesium chloride from the chloride molten salt by utilizing the difference in solubility of strontium chloride and cesium chloride in solid chloride molten salt and liquid chloride molten salt.

[0105] In some embodiments, a third splicing mating member 3127 is formed at the lower end of the second purification housing 3121.

[0106] See Figure 4 In some embodiments, the purification furnace body 3 may further include multiple first heating temperature measuring elements, multiple second heating temperature measuring elements, a temperature control element, multiple first space temperature measuring elements 33, multiple second space temperature measuring elements 34, and a channel temperature measuring element 35. The first heating temperature measuring elements and the second heating temperature measuring elements are used to measure the temperature of the first heating element 3113 and the second heating element 3123, respectively; the temperature control element is used to control the heating power of the first heating element 3113 and the second heating element 3123 according to the temperature measured by each of the first heating temperature measuring elements and each of the second heating temperature measuring elements, so that the temperature of the first heating element 3113 and the second heating element 3123 are respectively their set temperatures; the first space temperature measuring elements 33 and the second space temperature measuring elements 34 are used to measure the temperature of the first reaction subspace 301 and the second reaction subspace 302, respectively, so as to adjust the set temperatures of the first heating element 3113 and the second heating element 3123 according to the temperature of the first reaction subspace 301 and the second reaction subspace 302. The channel temperature sensor 35 is used to measure the temperature of the heat-insulating channel 31240, so as to adjust the set temperature of the second heating element 3123 according to the temperature of the heat-insulating channel 31240. In this embodiment, the temperature of the first reaction subspace 301 and the second reaction subspace 302 are measured by the first space temperature sensor 33 and the second space temperature sensor 34, which facilitates the determination of the actual temperature of the chloride molten salt, thereby facilitating the adjustment of the temperature of the first reaction subspace 301 and the second reaction subspace 302 as needed. The channel temperature sensor 35 measures the temperature of the heat-insulating channel 31240 to determine whether too much heat is transferred from the second reaction subspace 302 to the first reaction subspace 301 through the heat-insulating channel 31240. This allows for the reduction of heat transfer from the second reaction subspace 302 to the first reaction subspace 301 by adjusting the set temperature of the second heating element 3123, which is beneficial for the rapid cooling of the first reaction subspace 301 and thus improves the purification efficiency of the chloride molten salt.

[0107] Multiple first space temperature measuring elements 33 can be arranged at intervals along the height direction of the first reaction subspace 301. Multiple second space temperature measuring elements 34 can be arranged at intervals along the height direction of the second reaction subspace 302.

[0108] The temperatures of the first reaction subspace 301 and the second reaction subspace 302 can be the air temperatures within the first reaction subspace 301 and the second reaction subspace 302, respectively. In some embodiments, the temperature probes of the first space temperature measuring element 33 and the second space temperature measuring element 34 are both suspended in the air and used to measure the air temperatures within the first reaction subspace 301 and the second reaction subspace 302.

[0109] In some embodiments, when the first reaction subspace 301 is cooled by the cooling element 3114, if the temperature of the first reaction subspace 301 is too high, the heating power of the second heating element 3123 can be reduced to reduce the heat transferred from the second reaction subspace 302 to the first reaction subspace 301, thereby helping to reduce the temperature of the first reaction subspace 301.

[0110] See Figure 1 and Figure 7 In some embodiments, both the first purification shell 3111 and the second purification shell 3121 can be cylindrical; the purification furnace cover 32 is connected to the first purification shell 3111 to close the first purification shell 3111; the purification furnace base 36 is connected to the second purification shell 3121 to close the second purification shell 3121; the purification furnace cover 32 and the purification furnace base 36 are arranged opposite to each other, the oxygen supply component 2 is arranged on the side where the purification furnace cover 32 is located, and the purification moving component 6 is arranged on the side where the purification furnace base 36 is located. In this embodiment, the oxygen supply component 2 is located on the side of the purification furnace cover 32, which facilitates the oxygen supply component 2 to supply oxygen to the molten salt container 1 located in the first reaction subspace 301, so as to remove lanthanide chlorides in the chloride molten salt in the first reaction subspace 301; the purification moving component 6 is located on the side of the purification furnace base 36, which can drive the molten salt container 1 to move in the first reaction subspace 301 and the second reaction subspace 302 while avoiding interference between the purification moving component 6 and the oxygen supply component 2, so that each molten salt container 1 can cooperate with the oxygen supply component 2, thereby facilitating the oxygen supply component 2 to supply oxygen to the molten salt container 1.

[0111] See Figure 7 In some embodiments, a first air passage 3001 is formed between the first purification housing 3111 and the first insulation member 3112, and a second air passage 3002 is formed between the second purification housing 3121 and the second insulation member 3122, with the first air passage 3001 and the second air passage 3002 in fluid communication. See also Figure 1The purification furnace base 36 forms an outlet 360, and the exhaust gas discharge component 4 is in fluid communication with the second gas passage 3002 through the outlet 360. The first insulation component 3112 forms an airflow channel 3003 for connecting the first reaction subspace 301 and the first gas passage 3001, so that chlorine gas formed by oxygen reacting with lanthanide chlorides in the chloride molten salt in the molten salt container 1 can enter the first gas passage 3001 through the airflow channel 3003, and then enter the outlet 360 through the second gas passage 3002, thereby entering the exhaust gas discharge component 4. In this embodiment, through the above arrangement, the chlorine gas formed in the molten salt container 1 can be discharged to the exhaust gas discharge component 4 without passing through the second reaction subspace 302 after entering the first reaction subspace 301. This helps to reduce the residence time of chlorine gas in the reaction space 30, which is beneficial to the full reaction of lanthanide chlorides with oxygen to improve purification efficiency, and at the same time helps to avoid corrosion of the purification moving component 6 and the dynamic sealing structure 65 by chlorine gas.

[0112] In some embodiments, the first insulation member 3112 forms an airflow channel 3003 on the side away from the second insulation member 3122, so as to further prevent the chlorine gas flowing out from the molten salt container 1 from corroding the purification moving component 6 and the dynamic sealing structure 65, so as to make it difficult to separate the purification moving component 6 from the molten salt container 1 or to destroy the sealing of the reaction space 30, thus affecting the purification efficiency.

[0113] The first gas passage 3001 is formed radially outside the first reaction subspace 301, and the second gas passage 3002 is formed radially outside the second reaction subspace 302. For ease of description, the first gas passage 3001 and the second gas passage 3002 can be collectively referred to as the exhaust gas discharge channel. The exhaust gas discharge channel is formed radially outside the reaction space 30 and is connected to the exhaust port 360. The first reaction subspace 301 is connected to the exhaust gas discharge channel only through the airflow channel 3003, and the second reaction subspace 302 is connected to the exhaust gas discharge channel only through the first reaction subspace 301. Because the exhaust gas discharge channel is formed radially outside the reaction space 30, the exhaust gas discharge channel and the reaction space 30 are isolated from each other, which helps to prevent chlorine gas entering the exhaust gas discharge channel from returning to the reaction space 30.

[0114] In some embodiments, the chloride molten salt purification device 100 may further include a suction element for providing suction force to the exhaust gas outlet 4, so as to rapidly discharge chlorine gas from the first reaction subspace 301. In such an embodiment, the rapid extraction of chlorine gas by the suction element accelerates the departure of chlorine gas from the first reaction subspace 301, enhances the reaction between lanthanide chlorides and oxygen, and further prevents chlorine gas flowing out of the molten salt container 1 from corroding the purification moving assembly 6 and the dynamic sealing structure 65. The suction element is, for example, a vacuum pump.

[0115] In some embodiments, a vacuum can be created in the reaction space 30 using a suction device and an exhaust gas vent 4. In such an embodiment, the reaction space 30 is evacuated using the exhaust gas vent 4 before heating to prevent air in the reaction space 30 from affecting the removal of impurities.

[0116] See Figure 7 In some embodiments, the purification furnace cover 32 may include a purification cover body 321 and a heat-insulating cover 322; the heat-insulating cover 322 is disposed inside the purification cover body 321 and installed on the purification cover body 321. In such embodiments, the heat-insulating cover 322 and the first heat-insulating member 3112 form a first reaction subspace 301, and the two can also insulate the formed first reaction subspace 301 to reduce the heat loss from the first reaction subspace 301 to the outside, thereby helping to ensure that the first reaction subspace 301 can reach the preset temperature.

[0117] See Figure 7 In some embodiments, a gap exists between the insulation cover 322 and the first insulation member 3112 to form an airflow channel 3003, thereby allowing the first reaction subspace 301 to communicate with the exhaust gas discharge channel only through the airflow channel 3003. In such embodiments, the first reaction subspace 301 communicates with the exhaust gas discharge channel at its position furthest from the second reaction subspace 302, which facilitates the rapid departure of exhaust gas from the first reaction subspace 301 and reduces the impact on the purification moving component 6.

[0118] See Figure 7 In some embodiments, the purification cover body 321 forms a receiving cavity 3202 on the side facing the first purification furnace section 311, and the heat insulation cover 322 is disposed in the receiving cavity 3202. The heat insulation cover 322 is connected to the purification cover body 321 so that there is a gap between it and the first heat insulation member 3112.

[0119] See Figure 7 In some embodiments, the purification furnace base 36 may include a purification base plate 361 and a bottom insulation component 362; the bottom insulation component 362 is disposed on the inner side of the purification base plate 361 and installed on the purification base plate 361. In such embodiments, the bottom insulation component 362 and the second insulation component 3122 form a second reaction subspace 302, and the two components can also insulate the formed second reaction subspace 302 to reduce the heat loss from the second reaction subspace 302 to the outside, thereby helping to ensure that the second reaction subspace 302 can reach the preset temperature.

[0120] The heat insulation element 3124 is installed on the second purification shell 3121 and is in contact with the first heat insulation element 3112 and the second heat insulation element 3122, so that the heat insulation element 3124 can be disposed between the first heat insulation element 3112 and the second heat insulation element 3122, so that the heat insulation element 3124 can reduce the heat transfer between the first reaction subspace 301 and the second reaction subspace 302.

[0121] In some embodiments, the heat insulation cover 322 and the bottom heat insulation component 362 are disposed opposite to each other. In some embodiments, the second heat insulation component 3122 is spliced ​​with the bottom heat insulation component 362. The heat insulation component 3124 is spliced ​​with the first heat insulation component 3112 and the second heat insulation component 3122 to improve the heat insulation effect.

[0122] In some embodiments, the fourth splicing mating member 363 is formed on the cleanroom base plate 361.

[0123] In some embodiments, the first purification furnace section 311 may further include a first mounting member 3115, which is spaced apart from and connected to the first purification shell 3111. A first insulation member 3112 is mounted on the first mounting member 3115 radially inside the first mounting member 3115, and a first air passage 3001 is formed between the first mounting member 3115 and the first purification shell 3111. By providing the first mounting member 3115, the stability of the installation of the first insulation member 3112 can be improved.

[0124] In some embodiments, the second purification furnace section 312 may further include a second mounting member 3125, which is spaced apart from and connected to the second purification shell 3121. A second insulation member 3122 is mounted on the second mounting member 3125 radially inside the second mounting member 3125, and a second air passage 3002 is formed between the second mounting member 3125 and the second purification shell 3121. By providing the second mounting member 3125, the installation stability of the second insulation member 3122 can be improved.

[0125] See Figure 7In some embodiments, the bottom insulation component 362 is provided with a movable mating through hole 3620 for the purification moving component 6 to enter the reaction space 30, and the purification base plate 361 is provided with a base plate through hole 3610 for the purification moving component 6 to enter the reaction space 30. The dynamic sealing structure 65 is disposed between the purification moving component 6 and the base plate through hole 3610 of the purification base plate 361. In such an embodiment, the purification moving component 6 enters the second reaction subspace 302 through the aforementioned base plate through hole 3610 and movable mating through hole 3620. The bottom insulation component 362 and the second mounting component 3125 can isolate the base plate through hole 3610 and movable mating through hole 3620 of the purification base plate 361 from the exhaust gas discharge channel, thereby preventing chlorine gas from corroding the purification moving component 6 and the dynamic sealing structure 65.

[0126] In some embodiments, the bottom plate through hole 3610 and the movable mating through hole 3620 together form the lifting channel 3601.

[0127] In some embodiments, the vent 360 is formed on the purification base plate 361 and is located radially outside the bottom insulation member 362. After entering the exhaust gas discharge channel, chlorine gas flows out from the vent 360 to the exhaust gas discharge member 4, without flowing into the bottom plate through hole 3610 and causing adverse effects on the dynamic sealing structure 65.

[0128] In some embodiments, the purification moving assembly 6 and the container holding assembly 73 are configured such that the container holding assembly 73 can be hoisted through the top opening 303 of the purification furnace body 31 to engage with or detach from the purification moving assembly 6, so as to facilitate the placement of the container holding assembly 73 and the plurality of molten salt containers 1 held therein into the reaction space 30, thereby facilitating the placement of the chloride molten salt to be treated into the reaction space 30. The purification moving assembly 6 is used to move the container holding assembly 73 and the molten salt containers 1 as a whole into the first reaction subspace 301 and the second reaction subspace 302.

[0129] The material of the housing retaining assembly 73 is, for example, 310s, so that the housing retaining assembly 73 has good high temperature resistance and molten salt corrosion resistance.

[0130] See Figure 8 , Figure 8 yes Figure 1The diagram shows a schematic of the structure of the molten salt holding assembly 73 of the chloride molten salt purification device 100 after assembly with multiple molten salt containers 1. In some embodiments, the holding assembly 73 may include multiple layers of holding portions 731, support portions 732, and holding connection portions 733. The holding portions 731 are spaced apart along the height direction, and each holding portion 731 forms a holding hole 7310 for the molten salt container 1 to pass through. The molten salt container 1 can pass through the corresponding holding hole 7310 of each holding portion 731. The support portion 732 is disposed below each holding portion 731 to provide support for the lower end of the molten salt container 1. The holding connection portion 733 connects each holding portion 731 and the support portion 732. In such embodiments, multiple molten salt containers 1 can be held by the multiple layers of holding portions 731 and the support portion 732 to prevent the molten salt containers 1 from tipping over, without affecting the introduction of oxygen into each molten salt container 1 or the heating of each molten salt container 1.

[0131] In some embodiments, the number of retaining holes 7310 formed by each retaining part 731 can be 5, that is, the number of molten salt containers 1 that the container retaining assembly 73 can hold can be 5.

[0132] See Figure 8 In some embodiments, the uppermost holding portion 731 also forms a lifting assembly 734 for cooperating with external lifting equipment (e.g., lifting equipment inside the hot chamber) to lift the container holding assembly 73 and the plurality of molten salt containers 1 held therein into the purification furnace body 3 to cooperate with the purification moving assembly 6. The purification moving assembly 6 then provides support for the container holding assembly 73 and lifts the container holding assembly 73 and the plurality of molten salt containers 1 held therein away from the purification moving assembly 6. The embodiments of this application improve the efficiency of feeding and discharging into the purification furnace body 3, thereby improving the purification efficiency of chloride molten salt.

[0133] See Figure 8 In some embodiments, the lifting fitting 734 is located in the middle of the holding portion 731, and the holding holes 7310 are distributed around the lifting fitting 734. In such embodiments, the above arrangement allows each molten salt container 1 to be evenly distributed around the lifting fitting 734, which can prevent the container holding assembly 73 from tilting when being lifted through the lifting fitting 734, thereby reducing the difficulty of lifting and improving the lifting efficiency.

[0134] The inventors of this application have discovered that when the container holding assembly 73 is hoisted as a whole into the reaction space 30 and used in conjunction with the purification moving assembly 6 using hoisting equipment, the molten salt container 1 and the oxygen supply pipe 21 may be misaligned, which makes it difficult for the oxygen supply pipe 21 to be accurately inserted into the corresponding molten salt container 1 and to supply oxygen to the molten salt container 1.

[0135] For this question, see [link / reference] Figure 2 In some embodiments, the purification moving component 6 is also configured to provide support and positioning for the container holding component 73 so that the multiple molten salt containers 1 can be aligned with the multiple oxygen supply pipes 21 respectively, and to drive the container holding component 73 to move in the reaction space 30, thereby preventing the oxygen supply pipes 21 from being misaligned when they are lowered and inserted into the molten salt containers 1, thus preventing oxygen from being supplied to the molten salt containers 1.

[0136] See Figure 1 In some embodiments, the purification moving assembly 6 may include a support positioning part 61, a purification moving part 63, and a moving drive part. The support positioning part 61 is configured to provide support and positioning for the receiving part holding assembly 73; the purification moving part 63 is used to move the support positioning part 61; and the moving drive part is used to drive the purification moving part 63 to move. In such an embodiment, by providing support and positioning for the receiving part holding assembly 73 through the support positioning part 61, multiple molten salt receiving parts 1 can be aligned with multiple oxygen supply pipes 21 respectively, thereby allowing the oxygen supply pipes 21 to be inserted into the corresponding molten salt receiving parts 1 to supply oxygen to the molten salt receiving parts 1.

[0137] The purification moving component 6 may also include a moving rod 64 connected to the purification moving component 63. The moving drive component drives the moving rod 64 to move, thereby causing the purification moving component 63 to rise and fall.

[0138] In some embodiments, see Figure 7 The dynamic sealing structure 65 is provided in the lifting channel 3601 and the lifting channel 90 so that the moving rod 64 can achieve dynamic sealing with the lifting channel 3601 and the lifting channel 90.

[0139] In some embodiments, the bottom insulation member 362 also forms a groove 3621 adapted to the purification moving member 63, so that when the purification moving member 6 moves the receiving member holding member 73 to the second reaction subspace 302, the purification moving member 63 is located in the groove 3621 formed by the bottom insulation member 362, thereby improving the insulation effect of the second reaction subspace 302.

[0140] In some embodiments, the dimensions of the heat insulation channel 31240 are clearance-fitted with the purification moving member 63 so that when the purification moving member 6 moves the receiving member holding member 73 to the first reaction subspace 301, the purification moving member 63 is located within the heat insulation channel 31240, thereby improving the heat preservation effect of the first reaction subspace 301.

[0141] See Figures 10 to 13In some embodiments, the support positioning part 61 may include a support body 611 and a plurality of support positioning members 6110 disposed on the support body 611. The accommodating member holding assembly 73 forms a plurality of positioning mating members 7320 so as to position the accommodating member holding assembly 73 by the cooperation of the support positioning members 6110 and the positioning mating members 7320, so that when the accommodating member holding assembly 73 is supported by the purification moving assembly 6, each molten salt accommodating member 1 can be aligned with each oxygen supply pipe 21 respectively.

[0142] See Figure 12 In some embodiments, all the support positioning members 6110 of the support positioning part 61 are arranged non-rotationally symmetrically with respect to the center line of the support body 611; the positions of the positioning mating members 7320 correspond one-to-one with the positions of the support positioning members 6110. In such embodiments, when the support body 611 rotates relative to its center line, the multiple support positioning members 6110 will not completely coincide with their positions before rotation, so that there is a unique mating position between the receiving member holding assembly 73 and the support positioning part 61, so that when the receiving member holding assembly 73 is supported by the purification moving assembly 6, the position of each molten salt receiving member 1 in the reaction space 30 is uniquely determined.

[0143] See Figure 12 In some embodiments, there are three support positioning members 6110, and the line connecting the three support positioning members 6110 forms a non-equilateral triangle; there are three positioning mating members 7320, and the positions of the three positioning mating members 7320 correspond one-to-one with the positions of the three support positioning members 6110, so that there is a unique mating position between the receiving member holding assembly 73 and the support positioning part 61.

[0144] In some embodiments, the support positioning member 6110 is a positioning protrusion and the positioning mating member 7320 is a positioning through hole, so that the positioning of the support positioning part 61 and the receiving member retaining assembly 73 can be achieved through the cooperation of the positioning protrusion and the positioning through hole.

[0145] The inventors of this application discovered that after the molten salt purification process is completed, the container holding assembly 73 and the purification moving assembly 6 are not easily separated. The inventors further discovered that this may be due to the vapors from the chloride molten salt causing adhesion between the mating surfaces of the container holding assembly 73 and the purification moving assembly 6, or other reasons (such as a high-temperature oxygen environment) causing corrosion at the mating surfaces, thus making it difficult to separate the container holding assembly 73 and the purification moving assembly 6. For more information on this problem, see [link to relevant documentation]. Figure 12In some embodiments, the support body 611 is a ring. By setting the support body 611 as a ring, the embodiments of this application can reduce the contact area between the support body 611 and the receiving member retaining assembly 73, which helps to avoid the difficulty in separating the two due to adhesion or corrosion of the support body 611 and the receiving member retaining assembly 73.

[0146] In some embodiments, when the receiving member retaining assembly 73 includes a support portion 732, a positioning mating member 7320 is formed on the support portion 732, and a support positioning portion 61 is used to provide support and positioning for the support portion 732.

[0147] In some embodiments, the inner diameter of the ring (i.e., the support body 611) is two-fifths to three-fifths of the radius of the support portion 732, and the outer diameter of the ring is three-fifths to four-fifths of the radius of the support portion 732, so as to minimize the contact area between the support body 611 and the support portion 732, while also facilitating the support body 611 to provide stable support to the support portion 732.

[0148] In some embodiments, when the hoisting housing holding assembly 73 is separated from the purification moving assembly 6, the hoisting mating member 734 can be raised by the purification moving assembly 6 to a preset height such that the upper surface of the hoisting mating member 734 is higher than the top opening 303, so that the hoisting equipment in the hot chamber can engage with the hoisting mating member 734, thereby hoisting the housing holding assembly 733 away from the purification furnace body 3. The preset height can be 100mm, which is more conducive to the engagement of the hoisting equipment in the hot chamber with the hoisting mating member 734.

[0149] In some embodiments, the purification moving component 6 is also configured to keep the first reaction subspace 301 or the second reaction subspace 302 warm, so as to reduce the heat diffused from the first reaction subspace 301 to the second reaction subspace 302 through the heat insulation channel 31240 or reduce the heat lost from the second reaction subspace 302 to the outside through the bottom plate through hole 3610 and the moving mating through hole 3620, thereby helping to ensure that the first reaction subspace 301 or the second reaction subspace 302 can reach the preset temperature.

[0150] See Figure 1 In some embodiments, the purification moving component 6 may include a movable heat-insulating member 62 disposed on the purification moving component 63. The movable heat-insulating member 62 is used to insulate the second reaction subspace 302 or the first reaction subspace 301; by insulating the second reaction subspace 302 or the first reaction subspace 301 with the movable heat-insulating member 62, it is beneficial to ensure that the second reaction subspace 302 or the first reaction subspace 301 can reach a preset temperature. In some embodiments, the purification moving component 63 forms an insulated space 601, and the movable heat-insulating member 62 is disposed in the insulated space 601.

[0151] In some embodiments, the support positioning part 61 may further include a plurality of support columns 612 for connecting the support body 611 to the movable insulation member 62 or the purification movable member 63.

[0152] In some embodiments, since some impurity components in the chloride molten salt contain radioactivity, the chloride molten salt purification device 100 may be installed in a heated chamber.

[0153] In related technologies, since chloride molten salt is radioactive, it is currently mainly placed into the molten salt container 1 by a robotic arm, which results in low feeding efficiency and thus low purification efficiency of chloride molten salt.

[0154] For the above issues, please refer to Figure 1 In some embodiments, the chloride molten salt purification apparatus 100 may further include a chloride molten salt feeding device 7 for feeding chloride molten salt into a plurality of molten salt containers 1. The chloride molten salt feeding device 7 may include a molten salt receiving container 71, a molten salt suction device 72, and a rotary transport assembly. The molten salt receiving container 71 is used to receive chloride molten salt to be processed, and the molten salt receiving container 71 is configured to form an outlet 712; the molten salt suction device 72 is used to provide a suction force to allow the chloride molten salt to be processed to enter the molten salt receiving container 71; the rotary transport assembly is configured to move the container holding assembly 73 to a position where one molten salt container 1 is aligned with the outlet 712 of the molten salt receiving container 71, so that the molten salt in the molten salt receiving container 71 can enter the molten salt container 1 through the outlet 712; and is configured to rotate the container holding assembly 73 so that each molten salt container 1 can be aligned with the outlet 712. In this embodiment, multiple molten salt containers 1 are held by the container holding assembly 73, and the container holding assembly 73 is moved and rotated by the rotating transport assembly so that each molten salt container 1 can be aligned with the liquid outlet 712, thereby realizing feeding into each molten salt container 1, improving feeding efficiency, and thus improving the purification efficiency of chloride molten salt.

[0155] Molten salt suction component 72 is, for example, a vacuum pump.

[0156] See Figure 1 and Figure 9In some embodiments, the rotary transport assembly may include a support mating part 741, a rotating member 742, and a moving member 743. The support mating part 741 cooperates with the container holding assembly 73 to provide support for the container holding assembly 73; the rotating member 742 drives the support mating part 741 to rotate, thereby driving the container holding assembly 73 to rotate together; the moving member 743 moves the rotating member 742 and the support mating part 741 so that one of the molten salt containers 1 of the container holding assembly 73 is aligned with the outlet 712 of the molten salt receiving container 71. In such an embodiment, the moving member 743 drives the rotating member 742 and the support mating part 741 to move, and the rotating member 742 drives the support mating part 741 to rotate, so that each molten salt container 1 held by the container holding assembly 73 can be aligned with the outlet 712, thereby feeding multiple molten salt containers 1 held by the container holding assembly 73 to improve feeding efficiency.

[0157] In some embodiments, the structure of the support mating part 741 may be substantially the same as the structure of the support positioning part 61. See also Figure 9 In some embodiments, the support mating part 741 includes a support mating body 7411 and a plurality of support mating positioning members 7410 disposed on the support mating body 7411. The support mating positioning members 7410 can cooperate with the positioning mating members 7320 of the support part 732, so that the support part 732 and the support mating part 741 are circumferentially relatively stationary through the cooperation of the support mating positioning members 7410 and the positioning mating members 7320. In such embodiments, the support part 732 and the support mating part 741 are circumferentially relatively stationary, so that the support part 732 and the support mating part 741 can be rotated together by the rotating member 742, thereby enabling each molten salt container 1 held by the container holding assembly 73 to be aligned with the liquid outlet 712.

[0158] In some embodiments, all the support-fitting positioning members 7410 of the support-fitting part 741 are arranged non-rotationally symmetrically with respect to the center line of the support-fitting body 7411; the positions of the positioning members 7320 correspond one-to-one with the positions of the support-fitting positioning members 7410. In such an embodiment, when the support-fitting part 741 rotates relative to its center line, the plurality of support-fitting positioning members 7410 will not completely coincide with their positions before rotation, so that there is a unique mating position between the receiving member holding assembly 73 and the support-fitting part 741, so that when the receiving member holding assembly 73 is supported by the support-fitting part 741, the position of each molten salt receiving member 1 in the receiving member holding assembly 73 is uniquely determined.

[0159] See Figure 9In some embodiments, there are three supporting and positioning members 7410, and the line connecting the three supporting and positioning members 7410 forms a non-equilateral triangle; there are three positioning members 7320, and the positions of the three positioning members 7320 correspond one-to-one with the positions of the three supporting and positioning members 7410, so that the receiving member holding assembly 73 and the supporting and positioning part 741 have a unique relative position.

[0160] In some embodiments, the support fitting positioning member 7410 is a positioning protrusion and the positioning fitting member 7320 is a positioning through hole, so that the positioning of the support fitting part 741 and the receiving member retaining assembly 73 can be realized through the cooperation of the positioning protrusion and the positioning through hole.

[0161] See Figure 9 In some embodiments, the support mating body 7411 is an annular plate and the support portion 732 is a circular plate. The outer diameter of the circular plate is larger than the outer diameter of the annular plate to reduce the contact area between the support mating body 7411 and the receiving member retaining assembly 73. This helps to avoid the difficulty in separating the support mating body 7411 and the receiving member retaining assembly 73 due to adhesion or corrosion. It also helps to enable the support mating body 7411 to provide stable support to the support portion 732.

[0162] See Figure 9 In some embodiments, the rotary transport assembly may further include a mating member 744 for sliding engagement with the movable member 743. Through the sliding engagement between the movable member 743 and the mating member 744, the movable member 743 can move along the mating member 744, thereby enabling the movable member 743 to drive the rotating member 742 and the support mating part 741 to move.

[0163] See Figure 9 In some embodiments, the rotating transport assembly may further include a moving drive 745 and a rotating drive 746. The moving drive 745 is used to drive the moving part 743 to move along the mating part 744, and the rotating drive 746 is used to drive the rotating part 742 to rotate, thereby causing the rotating part 742 to drive the supporting mating part 741 to rotate.

[0164] See Figure 1In some embodiments, the molten salt receiving container 71 may include a container body 711, a heating element, and a control valve 713. The container body 711 is used to receive the chloride molten salt to be processed, and a liquid outlet 712 is formed at the bottom of the container body 711. The heating element is used to heat the container body 711 to prevent the chloride molten salt from solidifying. The control valve 713 is disposed on the liquid outlet 712 and configured to control the opening or closing of the liquid outlet 712, and to automatically control the opening duration of the liquid outlet 712 according to the volume of the molten salt container 1. In such embodiments, the heating element heats the container body 711 to prevent the chloride molten salt from solidifying, thereby ensuring that the chloride molten salt in the container body 711 can flow into the molten salt container 1 through the liquid outlet 712. At the same time, the control valve 713 controls the opening or closing of the liquid outlet 712 and the opening duration, which can control the amount of chloride molten salt entering each molten salt container 1, which is beneficial for precise feeding into each molten salt container 1 and improves feeding efficiency.

[0165] In some embodiments, the outlet 712 is formed at the bottom of the molten salt receiving container 71 so that the molten salt in the molten salt receiving container 71 can flow out through the outlet 712 under the action of gravity. In some embodiments, the chloride molten salt feeding device 7 further includes a support frame, the molten salt receiving container 71 is disposed above the support platform 9 through the support frame, and the mating part 744 extends from the outside of the support frame to the bottom of the molten salt receiving container 71 so that the moving part 743 can be positioned directly below the outlet 712 and outside the support frame, thereby facilitating the engagement and disengagement of the receiving part holding assembly 73 and the support mating part 741 using a lifting device.

[0166] Embodiments of this application also provide a method for purifying chloride molten salt, which utilizes the chloride molten salt purification equipment 100 provided in any embodiment of this application to remove impurity components from the chloride molten salt. The impurity components include lanthanide chlorides, strontium chloride, and cesium chloride. The purification method may include the following steps: S10, injecting chloride molten salt into a molten salt container 1 and placing the molten salt container 1 into a first reaction subspace 301; S20, heating the first reaction subspace 301 and supplying oxygen to the molten salt container 1 to allow the lanthanide chlorides in the chloride molten salt to react with oxygen, forming a precipitate and chlorine gas; S30, subsequently heating a second reaction subspace 302 to raise the temperature of the second reaction subspace 302 above the melting point of the chloride molten salt; S40, moving the molten salt container 1 from the first reaction subspace 301. The first reaction subspace 301 is cooled to a temperature below the melting point of the chloride molten salt in the second reaction subspace 302. Then, the molten salt container 1 is moved from the second reaction subspace 302 to the first reaction subspace 301 at a preset rate, so that the chloride molten salt entering the first reaction subspace 301 in the molten salt container 1 gradually solidifies, allowing strontium chloride and cesium chloride to accumulate in the chloride molten salt in the second reaction subspace 302, ultimately separating from and solidifying with the chloride molten salt.

[0167] The purification method provided in the embodiments of this application involves placing molten salt into the first reaction subspace 301 of the chloride molten salt purification device 100. After heating the first reaction subspace 301 and introducing oxygen into the molten salt to form lanthanide oxide precipitates of lanthanide chlorides, the molten salt container 1 can be transferred to the second reaction subspace 302 without removing the lanthanide oxide precipitates from the chloride molten salt. After cooling the first reaction subspace 301, the removal of strontium chloride and cesium chloride can be achieved by moving the molten salt container 1 from the second reaction subspace 302 to the first reaction subspace 301. Thus, the chloride molten salt purification device 100 provided in the embodiments of this application can achieve the removal of lanthanide chlorides, strontium chloride, and strontium chloride impurities from chloride molten salt using only one device. This simplifies the removal operation of impurities in chloride molten salt, reduces purification time, and improves the efficiency of purifying chloride molten salt.

[0168] In some embodiments, in step S20, the set temperature of the first heating element 3113 can be adjusted based on the temperatures measured by the plurality of first space temperature measuring elements 33, so that the temperature of the first reaction subspace 301 reaches the expected temperature. The temperature inside the first reaction subspace 301 is typically lower than the temperature of the first heating element 3113, and the temperature of the chloride molten salt in the molten salt container 1 is also typically lower than the temperature of the first heating element 3113. Therefore, it is necessary to adjust the actual temperature inside the first reaction subspace 301 to the expected temperature. For example, when removing lanthanide chlorides, it is necessary to adjust the actual temperature inside the first reaction subspace 301 to a temperature conducive to the reaction between oxygen and lanthanide chlorides; when removing strontium chloride and cesium chloride, it is necessary to adjust the actual temperature inside the first reaction subspace 301 to a temperature lower than the melting point of the chloride molten salt. In the embodiments of this application, the temperature of the first reaction subspace 301 is measured by the first space temperature measuring element 33, and the set temperature of the first heating element 3113 is adjusted according to the temperature measured by the first space temperature measuring element 33, so as to ensure that the temperature of the first reaction subspace 301 can reach the expected temperature, which is beneficial to removing lanthanide chlorides, strontium chloride and cesium chloride from the chloride molten salt.

[0169] In some embodiments, in step S30, the set temperature of the second heating element 3123 can be adjusted based on the temperatures measured by the multiple second space temperature measuring elements 34, so that the temperature of the second reaction subspace 302 reaches a expected temperature higher than the melting point of the chloride molten salt. The temperature inside the second reaction subspace 302 is typically lower than the temperature of the second heating element 3123, and the temperature of the chloride molten salt in the molten salt container 1 is also typically lower than the temperature of the second heating element 3123. Therefore, it is necessary to adjust the actual temperature inside the second reaction subspace 302 to the expected temperature. Thus, when removing strontium chloride and cesium chloride, it can be ensured that the temperature of the second reaction subspace 302 reaches the expected temperature. The embodiments of this application measure the temperature of the second reaction subspace 302 using the second space temperature measuring elements 34, and adjust the set temperature of the second heating element 3123 based on the temperature measured by the second space temperature measuring elements 34 to ensure that the temperature of the second reaction subspace 302 reaches the expected temperature, which is beneficial for removing strontium chloride and cesium chloride from the chloride molten salt.

[0170] In some embodiments, step S40 may further include: adjusting the set temperature of the second heating element 3123 according to the temperature measured by each first space temperature measuring element 33 and the temperature measured by the channel temperature measuring element 35, so as to reduce the heat transfer from the second reaction subspace 302 to the first reaction subspace 301, and avoid the temperature of the first reaction subspace 301 being too high, which is not conducive to the removal of strontium chloride and cesium chloride in the chloride molten salt and affects the purification efficiency of the chloride molten salt.

[0171] In some embodiments, during step S20, when oxygen is supplied to the molten salt container 1, chlorine is extracted from the first reaction subspace 301 without passing through the second reaction subspace 302. This facilitates the continued reaction of lanthanide chloride with oxygen and avoids corrosion of the purification moving component 6 and the dynamic sealing structure 65 by chlorine.

[0172] In some embodiments, in step S20, suction is provided to the exhaust gas discharge channel, and the chlorine gas in the first reaction subspace 301 is forced into the exhaust gas discharge channel by the pressure difference and discharged outward, thereby accelerating the departure of chlorine gas from the first reaction subspace 301, improving the reaction between lanthanide chloride and oxygen, and further preventing the chlorine gas flowing out of the molten salt container 1 from corroding the purification moving component 6 and the dynamic sealing structure 65. Suction can be provided to the exhaust gas discharge channel using a suction device.

[0173] In some embodiments, in step S50, the rate at which the molten salt container 1 moves from the second reaction subspace 302 to the first reaction subspace 301 can be 3 mm-15 mm / h. Moving the molten salt container 1 at this rate range prevents strontium chloride and cesium chloride from failing to accumulate in the chloride molten salt in the second reaction subspace 302 due to the container moving too quickly, thus ensuring the removal of strontium chloride and cesium chloride. Simultaneously, moving the molten salt container 1 at this rate range also avoids prolonged purification time due to the container moving too slowly, which is beneficial for ensuring purification efficiency.

[0174] The chloride molten salt purification method of this application is described in detail below with reference to specific embodiments.

[0175] ① A suction force is provided to the container body 711 by the molten salt suction component 72, so that the chloride molten salt flows into the container body 711; the moving component 743 drives the container holding component 73 and the five molten salt containers 1 held therein to move so that one of the molten salt containers 11 is aligned with the liquid outlet 712; then, the control valve 713 is opened and the opening degree of the control valve 713 is adjusted so that the chloride molten salt can flow into the molten salt container 1 at a set flow rate, and the control valve 713 is closed after a predetermined time; then, the rotating component 742 drives the five molten salt containers 1 to rotate so that the chloride molten salt can flow into the remaining four molten salt containers 1. At this time, the chloride molten salt solidifies into chloride salt due to the temperature drop; then, the moving component 743 moves away from the container body 711 to a position below the container body 711 so that the lifting equipment can lift it.

[0176] ② The furnace cover 32 is driven to rise and rotate by the furnace cover movement mechanism 8 to open the top opening 303. The container holding assembly 73 and the five molten salt containers 1 it holds are placed into the reaction space 30 by the hoisting equipment, and the container holding assembly 73 is made to cooperate with the purification moving assembly 6. The container holding assembly 73 is moved to the first reaction subspace 301. Then, the furnace cover 32 is driven to rotate by the furnace cover movement mechanism 8 to above the top opening 303, and then the furnace cover 32 is driven to fall to close the top opening 303.

[0177] ③ Start heating the first reaction subspace 301. After the chloride salt in the molten salt container 1 melts back into chloride molten salt, use the drive 223 to drive multiple oxygen supply pipes 21 to descend so that each oxygen supply pipe 21 is inserted into a molten salt container 1. Then, continue heating the first reaction subspace 301 and adjust the set temperature of the first heating element 3113 according to the temperature measured by the first space temperature measuring element 33 so that the temperature of the first reaction subspace 301 reaches the expected temperature. Then, oxygen is introduced into the molten salt container 1 through the oxygen supply pipes 21 to carry out the reaction.

[0178] ④ After the reaction is completed, the driving component 223 drives multiple oxygen supply pipes 21 to rise and leave the first reaction subspace 301; then, the second reaction subspace 302 is heated, and the purification moving component 6 moves each molten salt container 1 to the second reaction subspace 302; during the heating of the second reaction subspace 302, the temperature of the second reaction subspace 302 is measured by the second space temperature measuring component 34, and the set temperature of the second heating component 3123 is adjusted so that the temperature of the second reaction subspace 302 is not lower than the expected temperature of the melting point of the chloride molten salt (for example, 350°C). The first reaction subspace 301 is cooled by the cooling element 3114. During the cooling process, the temperature of the first reaction subspace 301 is measured by the first space temperature measuring element 33 and the temperature of the heat insulation channel 31240 is measured by the channel temperature measuring element 35. If the temperature of the first reaction subspace 301 is too high, the set temperature of the second heating element 3123 is reduced. When the temperature of the first reaction subspace 301 is not higher than the expected temperature of the melting point of the chloride molten salt (e.g., 270°C), the molten salt container 1 is moved from the second reaction subspace 302 to the first reaction subspace 301 at a speed of 3mm-15mm / h (e.g., 5mm / h) by the purification moving component until all the substances in the molten salt container 1 are solidified.

[0179] ⑤ The furnace cover movement mechanism 8 drives the purification furnace cover 32 to rise and rotate until the top opening 303 is opened; then, the purification moving component 6 moves the upper surface of the hoisting fitting 734 of the container holding component 73 to about 100mm above the top opening 303, and the hoisting equipment removes the container holding component 73 and the molten salt container 1 it holds, thus completing the removal of impurity components from the chloride molten salt.

[0180] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0181] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A chloride molten salt purification device, characterized in that, include: A container holding assembly for holding a plurality of molten salt containers, wherein the molten salt containers contain chloride molten salt to be processed; The purification furnace body and the purification furnace cover are provided. The purification furnace body has a top opening, and the purification furnace cover is used to open or close the top opening of the purification furnace body. The purification furnace cover and the purification furnace body together form a reaction space for accommodating the containment holding assembly. The furnace cover movement mechanism is used to drive the furnace cover to rise, fall and rotate relative to the furnace body, so that the top opening is fully opened or fully closed. A purification moving assembly is used to move the receiving member holding assembly in the reaction space, and when the top opening is fully opened, the purification moving assembly can move the receiving member holding assembly to protrude from the top opening; The purification furnace body includes: The first purification furnace section is configured to form a first reaction subspace together with the purification furnace cover, and the first purification furnace section is configured to heat and cool the first reaction subspace. The second purification furnace section and the purification furnace base together form a second reaction subspace. The second purification furnace section is configured to heat the second reaction subspace. The first reaction subspace and the second reaction subspace together form the reaction space; The first purification furnace section and the second purification furnace section are configured to be detachably connected, and the second purification furnace section and the purification furnace base are configured to be detachably connected.

2. The chloride molten salt purification equipment according to claim 1, characterized in that, The furnace cover movement mechanism includes a movement part for fixed connection with the furnace cover body, a movement drive assembly for fixed connection with the furnace body, and a movement mating part for detachable connection with the furnace body. The motion engagement part is configured to guide the motion of the motion part, so that the motion part can sequentially rise, fall, and rotate under the driving action of the motion drive assembly.

3. The chloride molten salt purification equipment according to claim 2, characterized in that, The motion drive assembly includes a rotation drive part, a rotation part, and a threaded mating part that is threadedly engaged with the rotation part; The rotation drive unit is used to drive the rotation unit to rotate, and the threaded engagement part is detachably and rigidly connected to the moving part; When the threaded engagement part is disconnected from the moving part and the moving engagement part is disconnected from the purification furnace body, the purification furnace cover can be lifted upward relative to the purification furnace body along with the moving part and the moving engagement part to separate from the purification furnace body.

4. The chloride molten salt purification equipment according to claim 3, characterized in that, The motion-fitting part includes: A guide cylinder and a guide connection portion for detachably connecting the guide cylinder to the purification furnace body; The guide cylinder has a guide portion. The moving part enters the guide cylinder and forms a guide mating part. Through the cooperation of the guide part and the guide mating part, the moving part can sequentially rise, fall and rotate under the driving action of the motion drive assembly.

5. The chloride molten salt purification equipment according to claim 4, characterized in that, The guide portion is a guide groove, and the guide mating portion enters the guide groove to move along the guide groove.

6. The chloride molten salt purification equipment according to claim 5, characterized in that, The guide groove includes a vertical extension and an inclined extension connected to the top of the vertical extension.

7. The chloride molten salt purification equipment according to claim 3, characterized in that, The moving part has a first mating groove and a second mating groove connected to the first mating groove at one end facing the rotating part; The threaded mating part includes a mating body and a mounting part connected to the mating body. The mating body enters the first mating groove, and the mounting part is detachably connected to the moving part outside the first mating groove by fasteners. The rotating part extends out from the threaded mating part and enters the second mating groove.

8. The chloride molten salt purification equipment according to claim 1, characterized in that, The first purification furnace section is supported by the second purification furnace section, and the first purification furnace section is configured to be lifted upward relative to the second purification furnace section to separate from the second purification furnace section after the detachable connection is released.

9. The chloride molten salt purification equipment according to claim 8, characterized in that, The second purification furnace section is supported by the purification furnace base, and the second purification furnace section is configured to be lifted upward relative to the purification furnace base to separate from the purification furnace base.

10. The chloride molten salt purification equipment according to claim 1, characterized in that, Also includes: A support platform is provided, and the purification furnace base is disposed on the support platform. Both the purification furnace base and the support platform are provided with lifting channels. A purification lifting assembly is configured to enter the reaction space through the lifting channel, thereby moving the receiving component holding assembly within the reaction space. The purification lifting assembly is connected to the support platform. The supporting platform, the purification furnace base, and the purification lifting assembly can all be lifted off together.

11. A method for purifying chloride molten salt, comprising using the chloride molten salt purification equipment according to any one of claims 1, 8-10 to remove impurity components from the chloride molten salt, wherein the impurity components include lanthanide chlorides, strontium chloride, and cesium chloride; Its features are, The purification method includes the following steps: S10. The chloride molten salt is injected into the molten salt container, and the molten salt container is placed in the first reaction subspace; S20. Heat the first reaction subspace and supply oxygen to the molten salt container so that the lanthanide chloride in the chloride molten salt reacts with oxygen to form a precipitate and chlorine gas. S30. Then heat the second reaction subspace so that the temperature of the second reaction subspace is higher than the melting point of the chloride molten salt; S40. Move the molten salt container from the first reaction subspace to the second reaction subspace, and cool the first reaction subspace so that the temperature of the first reaction subspace is lower than the melting point of the chloride molten salt. S50. The molten salt container is slowly moved from the second reaction subspace to the first reaction subspace so that the chloride molten salt entering the first reaction subspace in the molten salt container gradually solidifies, so that the strontium chloride and cesium chloride can be enriched in the chloride molten salt located in the second reaction subspace, and finally separate from the chloride molten salt and solidify.

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