Device for treating alkali metal by using alkali liquor

Abstract

The embodiment of the invention relates to the technical field of alkali metal treatment, in particular to a device for treating alkali metal by using alkali liquor, which comprises a reaction container, a reaction space providing part, an alkali metal injection assembly, an alkali liquor injection assembly and a hydrogen outlet pipeline. The reaction container forms an accommodating cavity. The reaction space providing part is arranged in the containing cavity, the reaction space providing part is arranged to form a reaction space used for enabling alkali liquor to react with alkali metal, and the reaction space providing part is further arranged to enable hydrogen generated in the reaction and alkali liquor with the higher concentration to enter the containing cavity. The alkali metal injection assembly is used for injecting liquid alkali metal into the reaction space. The alkali liquor injection assembly is used for injecting alkali liquor into the reaction space. The hydrogen outlet pipeline is used for allowing hydrogen in the containing cavity to flow out of the containing cavity. The reaction space providing part is arranged to enable a path of hydrogen flowing from the reaction space to the accommodating cavity to be a nonlinear path. According to the treatment device, hydrogen can enter the containing cavity after being effectively cooled.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of treating alkali metals, and in particular, to a device for treating alkali metals using alkali solution. Background Art

[0002] This section of content merely provides background information related to the present application and does not necessarily constitute prior art.

[0003] Sodium-cooled fast reactors produce a large amount of radioactive sodium waste during operation and after decommissioning. With the continued operation and increasing number of sodium-cooled fast reactors, the impact of radioactive sodium waste treatment on reactor operation safety and facility decommissioning will become increasingly prominent. Due to the active chemical properties of radioactive sodium waste, it is necessary to safely and effectively treat the waste sodium. At present, there are still many problems in the process of treating waste sodium. Summary of the invention

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

[0005] To solve the above technical problems, an embodiment of the present application provides a device for treating alkali metal with alkali solution, which may include: a reaction vessel, a reaction space providing member, an alkali metal injection assembly, an alkali solution injection assembly, and a hydrogen outlet pipeline. The reaction vessel is configured to form a receiving chamber. The reaction space providing member is arranged in the receiving chamber, and the reaction space providing member is configured to form a reaction space for providing alkali solution to react with alkali metal to generate hydrogen and alkali solution with a higher concentration, and the reaction space providing member is also configured to allow hydrogen and alkali solution with a higher concentration to enter the receiving chamber. The alkali metal injection assembly is used to inject liquid alkali metal into the reaction space. The alkali solution injection assembly is used to inject alkali solution into the reaction space. The hydrogen outlet pipeline is used to supply hydrogen in the receiving chamber to flow out of the receiving chamber. The reaction space providing member is configured to allow the path of hydrogen flowing from the reaction space to the receiving chamber to be a non-linear path.

[0006] The device for treating alkali metal with alkali solution provided in the embodiment of the present application forms a reaction space by setting a reaction space providing member, and injects liquid alkali metal and alkali solution into the reaction space, which can effectively limit the reaction to be concentrated in the reaction space, and reduce the corrosion of the reaction container by high heat and high concentration solution. Due to the concentration of the reaction, the temperature of the hydrogen is relatively high. The embodiment of the present application increases the flow path of the hydrogen from the reaction space to the accommodating chamber by setting the reaction space providing member so that the path of the hydrogen flowing from the reaction space to the accommodating chamber is a non-linear path, and prolongs the flow time of the hydrogen, which is conducive to the hydrogen entering the accommodating chamber after effective cooling, and avoids the damage of the sensor device by the high temperature hydrogen.

[0007] These and other advantages of the present application will become more apparent through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to further illustrate the above and other advantages and features of the present application, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. The accompanying drawings together with the following detailed description are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only describe typical examples of the present application and should not be regarded as limiting the scope of the present application.

[0009] Figure 1 is a schematic diagram of a device for treating alkali metal using alkali solution according to an embodiment of the present application observed from one angle;

[0010] Figure 2 is a schematic diagram of an apparatus for treating alkali metals using alkali solution according to an embodiment of the present application observed from another angle;

[0011] Figure 3 is a cross-sectional schematic diagram of a device for treating alkali metal using alkali solution according to one embodiment of the present application;

[0012] Figure 4 is a schematic structural diagram of a reaction space providing component according to an embodiment of the present application;

[0013] Figure 5 is a structural schematic diagram of a cover body matching assembly according to an embodiment of the present application;

[0014] Figure 6 is a schematic diagram of the connection between the alkali liquid injection assembly and its mounting part according to one embodiment of the present application;

[0015] Figure 7 is a schematic structural diagram of an alkali solution spraying assembly according to an embodiment of the present application;

[0016] Figure 8 yes Figure 7 A schematic cross-sectional view of the alkali solution injection assembly shown;

[0017] Fig. 9 Show Figure 1 An enlarged schematic diagram of the manhole assembly in the device shown.

[0018] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

[0019] Description of reference numerals:

[0020] 10. reaction container; 101. receiving chamber; 102. chamber; 103. installation space;

[0021] 11. Container body;

[0022] 12. Container cover assembly;

[0023] 121, cover body; 1211, cover body through hole;

[0024] 122, cover body matching assembly; 1221, inner tube; 1222, outer tube; 1223, first connecting plate; 1224, second connecting plate; 12241, third through hole; 1225, separator;

[0025] 20. Reaction space providing member; 21. Cylinder member; 211. First through hole; 22. Cover member; 23. Connecting member; 231. Mounting hole; 24. First mounting member; 201. Reaction space;

[0026] 30. Alkali metal injection assembly; 31. Alkali metal injection pipeline; 32. Alkali metal nozzle; 33. Heating element;

[0027] 40. Alkali solution injection assembly;

[0028] 41. Alkali solution injection pipeline; 411. First pipe section; 412. Second pipe section; 413. Third pipe section;

[0029] 42. Alkali liquid injection assembly; 421. First liquid outlet; 4210. Middle liquid outlet channel; 4211. First diffusion section; 4212. First inlet section; 42120. Flow limiting channel; 42121. Rectangular hole section; 42122. Gradually expanding hole section; 422. Second liquid outlet; 4220. Annular liquid outlet channel; 4221. Second diffusion section; 4222. Second inlet section; 423. Liquid outlet connector;

[0030] 43. third mounting member; 44. second mounting member;

[0031] 50. Hydrogen outlet pipeline;

[0032] 60. Filter element; 61. Stopper

[0033] 71. Hydrogen filter; 72. Support; 73. Manhole assembly; 731. Manhole plate; 7311. Lifting lug; 732. Support member; 7321. Lifting member; 74. Overflow pipe; 75. Level gauge mounting; 76. Alkali concentration meter; 77. Hydrogen-oxygen concentration meter; 78. Liquid-phase pressure sensor; 79. Temperature sensor; 710. High-frequency pressure sensor

[0034] 701. Water injection pipeline; 702. Bursting disc; 703. Pressure sensor; 704. Lifting lug; 705. Alkali discharge pipeline; 706. Inert gas pipeline Detailed implementation

[0035] In the following, exemplary embodiments of the present application will be described in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made during the development of any such actual embodiment in order to achieve the specific goals of the developer, for example, to comply with those limitations related to the system and business, and these limitations may vary with different implementations. In addition, it should also be understood that although the development work may be very complex and time-consuming, for those skilled in the art who benefit from the content of the present application, such development work is merely a routine task.

[0036] Here, it should also be noted that in order to avoid obscuring the present application with unnecessary details, only the device structures and / or processing steps closely related to the solution of the present application are shown in the drawings, while other details less related to the present application are omitted.

[0037] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meaning understood by those of ordinary skill in the field to which the present application belongs.

[0038] In the description of the embodiments of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] The inventors of the present application found that when the related art uses the chemical reaction of water and alkali metal in a reaction vessel to treat the alkali metal, the sensor components for monitoring the pressure, etc. in the reaction vessel are prone to damage, resulting in the inability to continue the reaction. The inventors of the present application further found that this is because in the related art, the temperature of the hydrogen gas generated by the reaction is relatively high, thus damaging the sensor components in contact with the hydrogen gas.

[0040] In order to solve the above technical problems, an embodiment of the present application provides a device for treating alkali metals using alkali solution (hereinafter referred to as a treatment device).

[0041] See also Figures 1 to 3 , Figure 1 and Figure 2 is a schematic diagram of the structure of a processing device according to an embodiment of the present application observed from different angles, Figure 3 It is a cross-sectional schematic diagram of a processing device of an embodiment of the present application. The processing device provided by the embodiment of the present application may include a reaction vessel 10, a reaction space providing member 20, an alkali metal injection assembly 30, an alkali solution injection assembly 40 and a hydrogen outlet pipeline 50. The reaction vessel 10 is configured to form a housing chamber 101. The reaction space providing member 20 is arranged in the housing chamber 101, and the reaction space providing member 20 is configured to form a reaction space 201 for providing alkali solution and alkali metal to react to generate hydrogen and a higher concentration of alkali solution. The reaction space providing member 20 is also configured to allow hydrogen and a higher concentration of alkali solution to enter the housing chamber 101. The alkali metal injection assembly 30 is used to inject liquid alkali metal into the reaction space 201. The alkali solution injection assembly 40 is used to inject alkali solution into the reaction space 201. The hydrogen outlet pipeline 50 is arranged in the reaction vessel 10, and is used for the hydrogen in the housing chamber 101 to flow out of the housing chamber 101. The reaction space providing member 20 is configured to allow the path of hydrogen from the reaction space 201 to the housing chamber 101 to be a non-linear path.

[0042] The processing device provided in the embodiment of the present application forms a reaction space 201 by setting a reaction space providing member 20, and injects liquid alkali metal and alkali solution into the reaction space 201, which can effectively limit the reaction to be concentrated in the reaction space 201, reduce the corrosion of the reaction container 10 by high heat and high concentration solution; due to the concentration of the reaction, the temperature of the hydrogen is relatively high. The embodiment of the present application increases the flow path of the hydrogen from the reaction space 201 to the accommodating chamber 101 by setting the reaction space providing member 20 so that the path of the hydrogen flowing from the reaction space 201 to the accommodating chamber 101 is a non-linear path, and prolongs the flow time of the hydrogen, which is conducive to the hydrogen entering the accommodating chamber 101 after effective cooling, avoiding the damage of the high-temperature hydrogen to the sensor device, and thus facilitating the processing device to continuously process radioactive waste sodium.

[0043] In some embodiments, the alkali metal may be sodium and the alkali solution may be sodium hydroxide solution.

[0044] See also Figure 4 , Figure 42 is a schematic diagram of the structure of a reaction space providing member according to an embodiment of the present application. In some embodiments, the reaction space providing member 20 may include multiple layers of coaxially arranged cylinders 21, a cover 22 that closes the top of the innermost cylinder 21, and a connector 23 that connects the cylinders 21. A plurality of first through holes 211 are formed on each cylinder 21, and the first through holes 211 on two adjacent cylinders 21 are staggered. The innermost cylinder 21 and the cover 22 form a reaction space 201, and the hydrogen in the reaction space 201 passes through the first through holes 211 of each cylinder 21 in sequence from the inside to the outside in a radial direction and enters the accommodating chamber 101.

[0045] In the embodiment of the present application, the innermost cylinder 21 and the cover 22 form a reaction space 201, which can effectively limit the reaction to be concentrated in the reaction space 201, and reduce the corrosion caused by high heat and high concentration solution to the reaction container 10. In addition, by providing a multi-layer cylinder 21, the impact generated during the reaction can be reduced, and the liquid surface oscillation outside the cylinder 21 can be reduced, which is beneficial to the control of the liquid level, ensuring the safety of the reaction, and thus facilitating the treatment device to continuously treat radioactive waste sodium.

[0046] Furthermore, since the first through holes 211 on the two adjacent cylinders 21 are staggered, when the hydrogen flows out from the first through hole 211 of the inner cylinder 21, it cannot flow directly into the first through hole 211 of the outer cylinder 21 along a straight line, but needs to adjust the flow direction to flow in a circuitous manner between the two adjacent cylinders 21. This arrangement makes the path of the hydrogen flowing through each layer of the cylinder 21 a non-linear path, thereby extending the flow time of the hydrogen, improving the cooling effect, and facilitating the hydrogen to enter the accommodating cavity 101 after being fully cooled.

[0047] Also, see Figure 3 and Figure 4 In some embodiments, the lower end of each layer of the cylinder 21 gradually rises from the inside to the outside in the radial direction. It can be understood that the reaction is concentrated in the reaction space 201, the liquid level fluctuation in the innermost layer of the cylinder 21 is the largest, and the liquid level fluctuation gradually decreases from the inside to the outside in the radial direction. In this embodiment, the length of each layer of the cylinder 21 is gradually reduced from the inside in the radial direction, so that the reaction space providing member 20 can reduce the overall weight of the reaction space providing member 20 while reducing the liquid level oscillation.

[0048] In some embodiments, the cover 22 is oval in shape, which helps to confine the reaction to be concentrated in the reaction space 201 .

[0049] See also Figure 4In some embodiments, the first through hole 211 of the innermost layer cylinder 21 is circular; the first through holes 211 of the other layers of cylinders 21 are racetrack-shaped through holes, which are composed of a rectangle and a semicircle connected to the two ends of the rectangle along the length direction of the cylinder 21. Such a configuration of the first through hole 211 is conducive to better dispersing the force of hydrogen on the flow channel wall, reducing the risk of stress concentration, thereby extending the service life of the reaction space providing member 20, and thus facilitating the processing device to continuously process radioactive waste sodium.

[0050] In some embodiments, the dimension of the racetrack-shaped through hole along the length direction of the cylinder 21 is greater than the dimension thereof along the circumference direction of the cylinder 21 .

[0051] In some embodiments, the number of the first through holes 211 in the circumferential direction of each layer of the cylinder 21 is the same. The size of the first through holes 211 in the height direction of the cylinder 21 of each layer of the cylinder 21 gradually increases from the inside to the outside in the radial direction, and the size of the first through holes 211 in the circumferential direction of the cylinder 21 gradually decreases from the inside to the outside in the radial direction. By such an arrangement, it is convenient for the gas to be quickly discharged from the radial inner side to the radial outer side of the reaction space providing member 20, reduce the pressure of the inner layer cylinder 21, ensure the safe progress of the reaction, and thus facilitate the treatment device to continuously treat radioactive waste sodium.

[0052] In the embodiment of the present application, the reaction space providing member 20 is arranged so that the path of hydrogen flowing from the reaction space 201 to the accommodating chamber 101 is a non-linear path, thereby extending the flow path of hydrogen in the reaction space providing member 20, which is equivalent to increasing the heat exchange area of ​​hydrogen; by setting the size of the first through hole 211 of each layer of the cylinder member 21 in the above manner, the gas is quickly discharged from the radial inner side to the radial outer side of the reaction space providing member 20, which is equivalent to accelerating the flow speed of hydrogen. Through the above two aspects, on the basis of ensuring that hydrogen flows out quickly from the reaction space providing member 20 to ensure the safety of the reaction, it is helpful to reduce the temperature of hydrogen.

[0053] For example, for a reaction space providing member 20 having three layers of cylinder members 21, the first through hole 211 of the outermost cylinder member 21 has the largest size along the height direction of the cylinder member 21, and the first through hole 211 of the innermost cylinder member 21 has the smallest size along the height direction of the cylinder member 21; the first through hole 211 of the outermost cylinder member 21 has the smallest size along the circumferential direction of the cylinder member 21, and the first through hole 211 of the innermost cylinder member 21 has the largest size along the height direction of the cylinder member 21.

[0054] In some embodiments, the areas of the first through hole 211 of the innermost cylinder member 21 and the first through hole 211 of the middle cylinder member 21 among the three-layer cylinder member 21 can be basically the same, and both are larger than the area of ​​the first through hole 211 of the outermost cylinder member 21, for example, larger than 5-10% of the area of ​​the first through hole 211 of the outermost cylinder member 21, so as to facilitate the outward flow of hydrogen.

[0055] The hydrogen flowing into the accommodating chamber 101 from the first through hole 211 can enter the hydrogen outlet pipeline 50 from the gap between the outermost cylinder 21 and the container body 11 , thereby establishing a path for the hydrogen to flow from the multi-layer cylinder 21 into the hydrogen outlet pipeline 50 .

[0056] See also Figure 3 In some embodiments, the processing device may further include a filter 60. The filter 60 is disposed in the accommodating chamber 101 to allow hydrogen to pass through while preventing foam formed during the reaction from passing through. In this embodiment, by disposing the filter 60, hydrogen can pass through but foam cannot pass through, which is beneficial to preventing foam from accumulating in the upper space of the accommodating chamber 101, thereby leaving sufficient gas buffer space in the upper part of the accommodating chamber 101.

[0057] In the related art, the filter element 60 is directly arranged on the connecting element 23, and the filter element 60 is in direct contact with the connecting element 23. The inventor of the present application found that such an arrangement makes the volume of the gas area above the liquid surface small, which is not conducive to the safety of the device operation. Figure 3 In the embodiment of the present application, the filter 60 is disposed above the connector 23 and is spaced apart from the connector 23 to form a space for hydrogen to flow between the connector 23 and the filter 60. This arrangement can increase the volume of the gas region above the liquid surface, thereby facilitating improved safety of the device operation.

[0058] See also Figure 3 In some embodiments, the reaction vessel 10 may include a container body 11 and a container cover assembly 12. The container body 11 has a top opening, and the container cover assembly 12 closes the top opening to form a accommodating chamber 101 together with the container body 11. The container cover assembly 12 includes a cover body 121 and a cover mating assembly 122 connected to the cover body 121. A chamber 102 connected to the hydrogen outlet pipeline 50 is formed between the cover mating assembly 122 and the cover body 121, and the cover mating assembly 122 also forms an installation space 103 connected to the chamber 102, and the filter element 60 is installed in the installation space 103. Since the installation space 103 is connected to the chamber 102, and the chamber 102 is connected to the hydrogen outlet pipeline 50, installing the filter element 60 in the installation space 103 is conducive to preventing foam from flowing into the chamber 102 as a gas buffer space, thereby ensuring that sufficient gas buffer space is reserved in the upper part of the accommodating chamber 101.

[0059] In some embodiments, the filter 60 may be a wire mesh.

[0060] In some embodiments, the hydrogen outlet pipeline 50 is disposed on the cover body 121 , so that hydrogen is discharged from above the cover body 121 .

[0061] See also Figures 1 to 3In some embodiments, the processing device may further include a hydrogen filter 71. The hydrogen filter 71 is installed on the hydrogen outlet pipeline 50 to remove impurities in the hydrogen.

[0062] See also Figure 5 , is a schematic diagram of the structure of a cover body matching assembly according to an embodiment of the present application. In some embodiments, the cover body matching assembly 122 may include a coaxially arranged inner cylinder 1221 and an outer cylinder 1222, a first connecting plate 1223, and a second connecting plate 1224. The inner cylinder 1221 is arranged on the radial inner side of the outer cylinder 1222, and the inner cylinder 1221 and the outer cylinder 1222 are both fixedly connected to the cover body 121. The first connecting plate 1223 is connected to the inner cylinder 1221 on the radial inner side of the inner cylinder 1221. The second connecting plate 1224 is connected to the inner cylinder 1221 and the outer cylinder 1222. The inner cylinder 1221, the outer cylinder 1222, the second connecting plate 1224, and the cover body 121 together form a chamber 102. The inner cylinder 1221, the outer cylinder 1222, and the second connecting plate 1224 together form the installation space 103, and the second connecting member 23 forms a third through hole 12241. The hydrogen entering the installation space 103 enters the chamber 102 through the third through hole 12241. The cover body 121, the inner cylinder 1221, and the first connecting plate 1223 close the top opening of the container body 11. In such an embodiment, by forming the third through hole 12241 on the second connecting plate 1224, the installation space 103 can be connected to the chamber 102, which is conducive to the flow of hydrogen.

[0063] In some embodiments, the container cover assembly 12 may further include a stopper 61 disposed on the outer cylinder 1222 to prevent the filter element 60 from falling.

[0064] In some embodiments, the container cover assembly 12 may further include a plurality of partitions 1225 disposed in the installation space 103 for dividing the installation space 103 into a plurality of fan-shaped spaces to enhance the strength of the container cover assembly 12 .

[0065] See also Figure 3 In some embodiments, the processing device may further include a first mounting member 24, which is used to fix the reaction space providing member 20 to the container body 11, so that the weight of the reaction space providing member 20 can be borne by the container body 11 instead of the container cover assembly 12, thereby facilitating the stability of the processing device. At the same time, such a configuration can also facilitate the disassembly and assembly of the reaction space providing member 20, thereby facilitating the maintenance or replacement of the reaction space providing member 20.

[0066] In some embodiments, the first mounting member 24 may be welded to the inner wall of the container body 11 , and the connecting member 23 of the reaction space providing member 20 may be connected to the first mounting member 24 .

[0067] See also Figure 4 In some embodiments, the connecting member 23 protrudes radially outward from the outermost cylinder member 21, and the portion of the connecting member 23 located radially outside the outermost cylinder member 21 is provided with a mounting hole 231. Correspondingly, the first mounting member 24 is also provided with a plurality of mounting holes, so that the connecting member 23 is connected to the first mounting member 24 by bolts.

[0068] See also Figure 3 In some embodiments, the alkali metal injection assembly 30 may include an alkali metal injection pipeline 31 and an alkali metal nozzle 32 connected to the alkali metal injection pipeline 31. The cover body 121 forms a cover body through hole 1211, and the alkali metal injection pipeline 31 is connected to the first connecting plate 1223 through the cover body through hole 1211. The first connecting plate 1223 and the cover 22 of the reaction space providing member 20 respectively form openings, and the alkali metal nozzle 32 enters the reaction space 201 through the opening, so that the alkali metal can be sprayed from the nozzle from top to bottom and injected into the reaction space 201, thereby increasing the contact area with the alkali solution and improving the reaction efficiency. In such an embodiment, the installation of the alkali metal injection pipeline 31 is facilitated; and by adjusting the connection position of the first connecting plate 1223 and the inner cylinder 1221, the height of the reaction space 201 can be adjusted.

[0069] In some embodiments, the alkali metal injection pipeline 31 may be connected to the first connection plate 1223 via a flange.

[0070] See also Figure 6 , Figure 6 1 is a schematic diagram of the structure of an alkali liquid injection assembly according to an embodiment of the present application. In some embodiments, the alkali liquid injection assembly 40 may include an alkali liquid injection pipeline 41 and an alkali liquid injection assembly 42 connected to the alkali liquid injection pipeline 41. The alkali liquid injection pipeline 41 is fixedly connected to the container body 11, and the alkali liquid injection assembly 42 is arranged facing the alkali metal injection assembly 30. Since the alkali liquid injection assembly 42 is arranged facing the alkali metal injection assembly 30, it is conducive to the chemical reaction between the alkali liquid and the alkali metal. At the same time, since the alkali liquid injection pipeline 41 is fixedly connected to the container body 11, it is conducive to ensuring the stability of the alkali liquid injection assembly 42 during the alkali liquid injection process.

[0071] In the related art, a heating chamber is formed in the container cover assembly 12, a heat transfer fluid is injected into the heating chamber, and the heat transfer fluid is heated by a heating element entering the heating chamber, thereby heating the alkali metal injection pipeline 31. However, the inventors of the present application have found that such a heating method is not uniform enough, resulting in the alkali metal in the alkali metal injection pipeline 31 not flowing smoothly, which is not conducive to the continuous reaction.

[0072] See also Figure 2In an embodiment of the present application, the alkali metal injection assembly 30 may further include a heating element 33, which is thermally connected to the alkali metal injection pipeline 31 on the radial outer side of the alkali metal injection pipeline 31 to heat the alkali metal injection pipeline 31. This can make the alkali metal in the alkali metal injection pipeline 31 heated more evenly and at a higher temperature, and can make the injection temperature of the alkali metal in the alkali metal injection pipeline 31 greater than 200°C, thereby facilitating the injection of the alkali metal into the reaction space 201 to react with the alkali solution.

[0073] In some embodiments, the heating element 33 may be a cast copper heater.

[0074] See also Figures 6 to 8 , Figure 6 is a schematic diagram of the connection between the alkali liquid injection assembly and its mounting parts according to one embodiment of the present application, Figure 7 is a schematic structural diagram of an alkali solution spraying assembly according to an embodiment of the present application. Figure 8 yes Figure 7 The cross-sectional schematic diagram of the alkali liquid injection assembly shown in the figure, in some embodiments, the alkali liquid injection assembly 42 may include a first liquid outlet 421 and a second liquid outlet 422 arranged radially outside the first liquid outlet 421; an annular liquid outlet channel 4220 is formed between the first liquid outlet 421 and the second liquid outlet 422, so that the alkali liquid in the alkali liquid injection pipeline 41 can be sprayed out from the annular liquid outlet channel 4220; the first liquid outlet 421 is configured to form a middle liquid outlet channel 4210, so that the alkali liquid in the alkali liquid injection pipeline 41 can overflow from the middle liquid outlet channel 4210. In such an embodiment, most of the alkali liquid in the alkali liquid injection pipeline 41 can be sprayed out from the annular liquid outlet channel 4220, and part of the alkali liquid flows out from the middle liquid outlet channel 4210 in the form of overflow, so as to prevent the alkali metal from accumulating in the middle of the alkali liquid injection assembly 42, which is conducive to the full contact between the alkali metal and the alkali liquid and improves the reaction efficiency.

[0075] In some embodiments, the alkali liquid spraying assembly 42 may include a liquid outlet connector 423 , and the first liquid outlet member 421 is connected to the second liquid outlet member 422 via the liquid outlet connector 423 .

[0076] In some embodiments, the first liquid outlet 421 may include a first inlet section 4212 and a first diffuser section 4211 connected to the first inlet section 4212 . The second liquid outlet 422 may include a second inlet section 4222 and a second diffuser section 4221 connected to the second inlet section 4222 .

[0077] The second inlet section 4222 is used to be connected to the alkali solution injection pipeline 41 , and an opening is formed at the bottom of the first inlet section 4212 so that part of the alkali solution entering the second inlet section 4222 can enter the first inlet section 4212 .

[0078] The first diffusion section 4211 and the second diffusion section 4221 may have a trumpet shape to facilitate the dispersion of the alkali solution. The first diffusion section 4211 may extend upwardly within the second diffusion section 4221 to the top of the second diffusion section 4221, and the outer diameter of the upper end of the first diffusion section 4211 is greater than the outer diameter of the upper end of the second diffusion section 4221, so that the alkali solution sprayed from the annular liquid outlet channel 4220 can spray out in a "lotus" shape.

[0079] In some embodiments, the first inlet section 4212 forms a flow limiting channel 42120 to slow down the flow rate of the alkali solution entering the first inlet section 4212, and prevent the alkali solution entering the first inlet section 4212 from being sprayed out from the middle liquid outlet channel 4210 due to excessive flow rate. In some embodiments, the flow limiting channel 42120 includes a plurality of rectangular hole sections 42121 and a plurality of gradually expanding hole sections 42122 arranged alternately, and the aperture of the gradually expanding hole section 42122 gradually increases from bottom to top to the same aperture as the rectangular hole section 42121. By such an arrangement, the flow rate of the alkali solution entering the first inlet section 4212 can be effectively slowed down.

[0080] In some embodiments, the alkali solution injection pipeline 41 includes a first pipe section 411, a second pipe section 412, and a third pipe section 413. The third pipe section 413 extends in a vertical direction and is connected to the alkali solution injection assembly 42. In some specific embodiments, the third pipe section 413 is detachably connected to the second inlet section 4222. For example, the third pipe section 413 is threadedly connected to the second inlet section 4222.

[0081] The second pipe section 412 is connected to the first pipe section 411, and both the second pipe section 412 and the first pipe section 411 extend in the horizontal direction. The first pipe section 411 is inserted into the container body 11, and the first pipe section 411 and the second pipe section 412 are connected by a flange. This arrangement facilitates the connection and disassembly of the alkali liquid injection assembly 42 and the alkali liquid injection pipeline 41.

[0082] See also Figure 6 In some embodiments, the processing device may further include a third mounting member 43 and a second mounting member 44. The extension direction of the third mounting member 43 is perpendicular to the extension direction of the second mounting member 44, and the third mounting member 43 is fixedly connected to the second mounting member 44. The third mounting member 43 and the second mounting member 44 are used to connect the alkali liquid injection assembly 42 to the container body 11 to improve the stability of the alkali liquid injection assembly 42.

[0083] In some embodiments, the third mounting member 43 is fixedly connected to the third pipe segment 413 , and the second mounting member 44 is fixedly connected to the inner wall of the container body 11 (eg, welded).

[0084] In some embodiments, the processing device may further include a camera. The camera is disposed on the side wall of the container body 11, and the cover 22 of the reaction space providing member 20 may form an observation window so that the camera can observe the spraying of the alkali metal and the reaction of the alkali metal with the alkali solution.

[0085] See also Figure 1 and Figure 2 In some embodiments, the processing device may further include a support 72. The support 72 is used to support the reaction container 10 to improve the stability of the reaction container 10.

[0086] See also Figure 1 and Figure 2 In some embodiments, the side wall of the container body 11 forms a manhole channel, and the processing device may also include a manhole assembly 73, which is used to seal the manhole channel to facilitate maintenance personnel to enter the interior of the reaction container 10 to repair or replace parts. At the same time, it also reduces the number of times the cover body 121 is opened, which is conducive to reducing safety risks.

[0087] In some embodiments, a winding pad may be used to seal the manhole assembly 73 and the container body 11 .

[0088] See also Fig. 9 , Fig. 9 Show Figure 1 The enlarged schematic diagram of the manhole assembly in the device shown in the figure, in some embodiments, the manhole assembly 73 may include a manhole plate 731 for closing the manhole passage and a connecting assembly for connecting the manhole plate 731 to the container body 11. The connecting assembly may include: a support member 732 hinged to the container body 11, a hanging member 7321 connected to the support member 732, and a hanging ear 7311 connected to the manhole plate 731. When the manhole plate 731 needs to be opened, the support member 732 is rotated, and the support member 732 hangs the manhole plate 731 away from the position of closing the manhole passage.

[0089] See also Figure 3 In some embodiments, the treatment device may further include an alkali solution discharge pipeline 705 for discharging the alkali solution in the reaction vessel 10. The alkali solution may be continuously injected into the reaction space 201 through the alkali solution injection assembly 40. When the alkali solution level is at a predetermined height (i.e., a normal working level), the alkali solution flows out of the reaction vessel 10 from the alkali solution discharge pipeline 705, so that the alkali solution level in the reaction vessel 10 is substantially stabilized at a predetermined height, so as to ensure smooth reaction.

[0090] See also Figure 1 and Figure 3In some embodiments, the processing device may further include an overflow pipe 74. The overflow pipe 74 is disposed on the side wall of the container body 11 and is connected to the accommodating chamber 101. The height of the overflow pipe 74 is higher than the normal working liquid level in the accommodating chamber 101. When the liquid level in the accommodating chamber 101 continues to rise and exceeds the minimum height of the overflow pipe 74, the liquid will automatically be discharged from the overflow pipe 74. The entire discharge process is passively controlled, which fully guarantees the safety of the reaction container 10. By providing the overflow pipe 74, it is helpful to prevent the excessively high alkali liquid level from affecting the discharge of hydrogen.

[0091] In some embodiments, the normal working liquid level of the alkali solution is higher than the bottom of the outermost cylinder 21 and lower than the height of the overflow pipe 74 .

[0092] In some embodiments, the end of the overflow pipe 74 may be connected to a U-shaped tube to prevent the hydrogen in the reaction vessel 10 from flowing out through the overflow pipe 74 .

[0093] See also Figure 1 and Figure 2 In some embodiments, the processing device may further include a plurality of pressure measuring components for measuring the pressure in the reaction vessel 10. The plurality of pressure measuring components may include a pressure sensor 703, a high frequency pressure sensor 710, and a liquid phase pressure sensor 78 for monitoring the alkali liquid pressure to ensure that the measured pressure data is accurate.

[0094] In some embodiments, the processing device may further include a temperature sensor 79 for monitoring the temperature inside the reaction vessel 10 .

[0095] See also Figure 1 and Figure 3 In some embodiments, the processing device may further include a liquid level meter for measuring the liquid level in the reaction container 10. The liquid level meter is used to measure the liquid level of the alkali solution so that the liquid level of the alkali solution is at a predetermined height. The reaction container 10 also includes a liquid level meter mounting member 75 disposed on the container body 11 for mounting the liquid level meter.

[0096] See also Figure 1 and Figure 3 In some embodiments, the processing device may further include an alkali solution concentration meter 76 and a hydrogen and oxygen concentration meter 77. The alkali solution concentration meter 76 is used to monitor the concentration of the alkali solution. The hydrogen and oxygen concentration meter 77 is used to monitor the concentration of hydrogen and oxygen in the reaction container 10 in real time. The processing device may also include an alarm, which will sound an alarm if the oxygen or oxygen concentration is too high.

[0097] The alkali solution concentration meter 76 , the hydrogen and oxygen concentration meter 77 and the liquid phase pressure sensor 78 may be respectively disposed on the side walls of the container body 11 .

[0098] See also Figure 3In some embodiments, the treatment device may further include a water injection pipeline 701. The water injection pipeline 701 is connected to the bottom of the container body 11 and is used to reduce the temperature and concentration of the alkali solution. If the temperature or concentration of the alkali solution is too high, liquid water is introduced through the water injection pipeline 701 to reduce the temperature and concentration of the alkali solution.

[0099] In some embodiments, the processing device may further include a bursting disc 702, which is disposed on the cover body 121. If the internal pressure of the reaction vessel 10 is too high and exceeds the rated pressure of the bursting disc 702, the bursting disc 702 will burst, causing the top of the cover body 121 to rupture for pressure relief, thereby facilitating the safety of the device operation.

[0100] See also Figure 1 and Figure 2 In some embodiments, the processing device may further include an inert gas pipeline 706 for injecting an inert gas (such as argon) into the reaction vessel 10 to exhaust the oxygen in the reaction vessel 10, thereby preventing oxygen from participating in the chemical reaction and reducing safety risks. After the oxygen is completely exhausted, the inert gas valve is closed to stop the inert gas from being introduced.

[0101] See also Figure 1 and Figure 2 In some embodiments, the container cover assembly 12 may further include a lifting ear 704. The lifting ear 704 is fixedly connected to the cover body 121 to facilitate lifting the entire processing device.

[0102] The process of treating alkali metals using the treatment device provided in the embodiments of the present application is described in detail below in conjunction with specific embodiments.

[0103] (1) Assemble the entire processing device and ensure the sealing of the processing device.

[0104] (2) Argon gas is introduced into the reaction vessel 10 through the inert gas pipeline 706 to replace all oxygen inside the reaction vessel 10, and the oxygen concentration inside the reaction vessel 10 is detected. After the oxygen is completely eliminated, the valve of the inert gas pipeline 706 is closed to stop introducing argon gas into the reaction vessel 10.

[0105] (3) A sodium hydroxide solution with a concentration of 30% is injected into the reaction space 201 through the alkali solution injection component 40; the liquid level of the sodium hydroxide solution is monitored by a liquid level meter until the liquid level reaches a predetermined height; the alkali solution discharge pipeline 705 is opened, and a sodium hydroxide solution with a concentration of 30% is continuously injected to keep the liquid level at a predetermined height; the sodium hydroxide solution is sprayed out through the alkali solution injection component 42 to form a "lotus" shape, and the middle part of the sodium hydroxide solution flows out in the form of overflow; the sodium hydroxide solution enters the reaction space 201.

[0106] (4) injecting metallic sodium into the alkali metal injection pipeline 31; using the cast copper heater 33 to heat the alkali metal injection pipeline 31 so that the temperature of the metallic sodium reaches 250° C., so as to ensure that the metallic sodium in the alkali metal injection pipeline 31 remains in a liquid state; the liquid sodium is atomized by the alkali metal nozzle 32 to form sodium particles of 200 μm; the sodium particles enter the reaction space 201, collide with the ejected sodium hydroxide solution, and react chemically to generate hydrogen.

[0107] (5) Turn on the hydrogen exhaust fan, and the hydrogen in the reaction space 201 passes through the first through holes 211 of each cylinder 21 in turn from the inside to the outside in the radial direction and enters the accommodating chamber 101; after the hydrogen flows out from the first through holes 211 of the outermost cylinder 21, it flows into the metal mesh in the installation space 103 through the gap between the outermost cylinder 21 and the container body 11; after the foam is removed by the metal mesh in the installation space 103, the hydrogen enters the chamber 102 through the third through hole 12241 on the second connecting member 23, and then flows into the hydrogen outlet pipeline 50 connected to the chamber 102, and after the impurities are removed by the hydrogen filter 71, the hydrogen is discharged.

[0108] (6) During the reaction process, the temperature and pressure values ​​inside the reaction vessel 10 are continuously monitored by the temperature sensor 79 and the pressure sensor 703, and the concentrations of hydrogen and oxygen are monitored in real time by the hydrogen and oxygen concentration meter 77. If the temperature of the alkali solution is too high or the concentration of the alkali solution is too high, liquid water can be injected into the reaction vessel 10 through the water injection pipeline 701 to reduce the temperature or concentration of the alkali solution; if the pressure inside the reaction vessel 10 is too high and exceeds the rated pressure of the bursting disc 702, the bursting disc 702 explodes, causing the top of the cover body 121 to rupture for pressure relief. If oxygen appears inside the reaction vessel 10 or the oxygen concentration is too high, an alarm is issued.

[0109] (7) After the processing device has been running for a period of time, the manhole assembly 73 is opened, and maintenance personnel enter the reaction vessel 10 to repair or replace internal components; after the repair or replacement work is completed, the manhole assembly 73 is closed, and steps (1) to (7) are repeated to complete the next operation cycle.

[0110] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0111] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A device for treating alkali metals using alkali solution, characterized in that: include: A reaction container, configured to form a receiving chamber; A reaction space providing member is disposed in the containing chamber, the reaction space providing member is configured to form a reaction space for the alkali solution to react with the alkali metal to generate hydrogen gas and alkali solution with a higher concentration, and the reaction space providing member is further configured to allow the hydrogen gas and alkali solution with a higher concentration to enter the containing chamber; an alkali metal injection assembly, used for injecting liquid alkali metal into the reaction space; An alkali solution injection component, used for injecting alkali solution into the reaction space; A hydrogen outlet pipeline, used for allowing the hydrogen in the accommodating cavity to flow out of the accommodating cavity; The reaction space providing member is configured so that a path for the hydrogen to flow from the reaction space to the containing chamber is a non-linear path.

2. The device according to claim 1, characterized in that The reaction space providing component comprises: Multiple layers of coaxially arranged cylinders, a cover for sealing the top of the innermost cylinder, and a connector for connecting the cylinders; A plurality of first through holes are formed on each layer of the cylinder members, and the first through holes on two adjacent cylinder members are staggered with each other; The innermost cylinder and the cover form the reaction space, and the hydrogen in the reaction space passes through the first through holes of each cylinder in sequence from inside to outside in the radial direction and enters the accommodating cavity.

3. The device according to claim 2, characterized in that The lower end of each layer of the cylinder gradually rises from the inside to the outside along the radial direction.

4. The device according to claim 2, characterized in that The first through holes of the innermost layer of the cylinder are circular; the first through holes of the other layers of the cylinder are racetrack-shaped through holes, which are composed of a rectangle and a semicircle connected to the two ends of the rectangle along the length direction of the cylinder.

5. The device according to claim 2, characterized in that The size of the first through hole of each layer of the cylinder along the height direction of the cylinder gradually increases from the inside to the outside along the radial direction, and the size along the circumferential direction of the cylinder gradually decreases from the inside to the outside along the radial direction.

6. The device according to any one of claims 2 to 5, characterized in that: It also includes a filter element, which is arranged in the containing cavity and is used to allow hydrogen to pass through while preventing foam formed in the reaction from passing through; The filter element is disposed above the connector and is spaced apart from the connector to form a space for hydrogen to flow between the connector and the filter element.

7. The device according to claim 6, characterized in that The reaction container comprises a container body and a container cover assembly, wherein the container body has a top opening, and the container cover assembly closes the top opening to form the containing cavity together with the container body; The container cover assembly comprises a cover body and a cover matching assembly connected to the cover body; A chamber communicating with the hydrogen outlet pipeline is formed between the cover body matching assembly and the cover body. The cover body matching assembly also forms an installation space communicating with the chamber, and the filter element is installed in the installation space.

8. The device according to claim 7, characterized in that The cover body matching component comprises: An inner cylinder and an outer cylinder are coaxially arranged, wherein the inner cylinder is arranged radially inward of the outer cylinder, and both the inner cylinder and the outer cylinder are fixedly connected to the cover body; a first connecting plate connected to the inner cylinder at the radial inner side of the inner cylinder; a second connecting plate connected to the inner tube and the outer tube; The inner tube, the outer tube, the second connecting plate, and the cover body together form the chamber; The inner tube, the outer tube, and the second connecting plate together form the installation space, the second connecting plate forms a third through hole, and the hydrogen entering the installation space enters the chamber through the third through hole; The cap body, the inner cylinder and the first connecting plate close the top opening of the container body.

9. The device according to claim 8, characterized in that The alkali metal injection assembly comprises: an alkali metal injection pipeline and an alkali metal nozzle connected to the alkali metal injection pipeline; The cover body forms a cover through hole, the alkali metal injection pipeline is connected to the first connecting plate through the cover through hole, the first connecting plate and the cover of the reaction space providing member respectively form openings, and the alkali metal nozzle enters the reaction space through the openings.

10. The device according to claim 7, characterized in that The alkali solution injection assembly comprises: An alkali solution injection pipeline and an alkali solution injection assembly connected to the alkali solution injection pipeline; The alkali solution injection pipeline is fixedly connected to the container body, and the alkali solution injection component is arranged facing the alkali metal injection component.

11. The device according to claim 10, characterized in that The alkali solution injection assembly comprises: a first liquid outlet member and a second liquid outlet member arranged radially outside the first liquid outlet member; an annular liquid outlet channel is formed between the first liquid outlet member and the second liquid outlet member, so that the alkali liquid in the alkali liquid injection pipeline can be sprayed out from the annular liquid outlet channel; the first liquid outlet member is arranged to form a middle liquid outlet channel, so that the alkali liquid in the alkali liquid injection pipeline can overflow from the middle liquid outlet channel.

Images