A low-energy-consumption metal lithium preparation device of an up-inserted multi-anode electrolytic cell

Abstract

The utility model relates to non ferrous metallurgy technical field discloses a kind of low-energy-consumption metal lithium preparation devices of upper insertion multi-anode electrolytic cell, including heat preservation layer, the top of the heat preservation layer is fixedly connected with connecting plate, the top of the connecting plate is equipped with multiple chutes, the top of the connecting plate is fixedly connected with sealing chamber near edge, the right side of the sealing chamber is communicated with fan, the output of the fan is communicated with gas pipe one, the outer wall of the gas pipe one is slidably connected with sealing plug one, the outer wall of the sealing plug one is slidably connected with reagent bottle one, the inner wall of the sealing plug one is slidably connected with gas pipe two, in the utility model, the chlorine generated by anode reaction is recycled back to electrolytic cell after multistage processing, realize the effective utilization and resource recovery of chlorine, this process not only avoids the pollution caused by direct discharge of chlorine to environment, but also reduces the collection and processing cost of chlorine.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal metallurgy technology, and in particular to a low-energy-consumption lithium metal preparation device with an upper multi-anode electrolytic cell. Background Technology

[0002] Lithium is a metallic element, hailed as a green energy metal and "white oil," widely used in energy storage, chemical, pharmaceutical, metallurgical, and electronics industries. Elemental lithium is a silvery-white, soft metal, the lightest of all known metals. It reacts with water and is soluble in nitric acid and liquid ammonia solutions. Lithium belongs to the alkali metals, but its compounds are not as typical as other alkali metals. This is because lithium has a high charge density and a stable helium-type double electron shell, making it easy to polarize other molecules and ions while remaining relatively unpolarized itself. This affects the stability of lithium and its compounds. Furthermore, because lithium has the most negative electrode potential, it is the most reactive metal among known elements. Industrially, metallic lithium is mainly prepared through molten salt electrolysis.

[0003] Molten salt electrolysis uses lithium chloride as the main electrolyte and adds flux to lower the melting point. The crude lithium obtained by electrolysis can be processed to obtain high-purity metallic lithium. Existing molten salt electrolysis methods mostly use multiple anodes. This design can shorten the average distance between the anode and cathode. At the same time, the uniform current distribution reduces local overvoltage, thereby reducing the overall cell voltage. According to the electrolysis energy consumption formula, the reduction of cell voltage can directly reduce the energy consumption per unit product. However, the cost of collecting and treating chlorine gas generated by the anode in existing multi-anode metallic lithium preparation devices is high, and it is not well recycled. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low-energy-consumption lithium metal preparation device with an upper-mounted multi-anode electrolytic cell, aiming to improve the problem of high cost of chlorine collection and treatment in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a low-energy-consumption lithium metal preparation device with an upper-insulated multi-anode electrolytic cell, comprising an insulation layer, a connecting plate fixedly connected to the top of the insulation layer, multiple sliding grooves formed on the top of the connecting plate, a sealing chamber fixedly connected near the edge of the top of the connecting plate, a fan connected to the right side of the sealing chamber, a gas pipe connected to the output end of the fan, a sealing plug slidably connected to the outer wall of the gas pipe slidably, a reagent bottle slidably connected to the outer wall of the sealing plug slidably, a gas pipe 2 slidably connected to the inner wall of the sealing plug slidably, a sealing plug 2 slidably connected to the outer wall of the gas pipe 2, a reagent bottle 2 slidably connected to the outer wall of the sealing plug 2, a gas pipe 3 slidably connected to the inner wall of the sealing plug 2, and a stirring mechanism fixedly connected to the left side of the insulation layer. The stirring mechanism is used to promote the uniform distribution of ions in the molten salt, further reduce concentration polarization, improve electrolysis efficiency, and reduce energy consumption.

[0006] As a further description of the above technical solution:

[0007] The stirring mechanism includes a liquid bend one, the outer wall of which is fixedly connected to the left side of the insulation layer. A water pump is connected to the top of the insulation layer, a liquid straight pipe is connected to the right side of the water pump, a water tank is connected to the right end of the liquid straight pipe, a motor is fixedly connected to the top of the water tank, a fan blade is fixedly connected to the output end of the motor, multiple liquid bends two are connected to the rear side of the water tank, and multiple liquid bends three are connected to the front side of the water tank.

[0008] As a further description of the above technical solution:

[0009] A slider is slidably connected to the inner wall of the chute, and a cathode is slidably connected to the top front side of the connecting plate.

[0010] As a further description of the above technical solution:

[0011] An anode is slidably connected to the inner wall of the slider, and a terminal block is fixedly connected to the top of the anode.

[0012] As a further description of the above technical solution:

[0013] The top of the cathode is fixedly connected to a second terminal, and the outer wall of the cathode is fixedly connected to a collection cover.

[0014] As a further description of the above technical solution:

[0015] The front side of the collection cover is connected to a lithium guide tube, and the bottom end of the lithium guide tube is connected to a lithium collection chamber.

[0016] As a further description of the above technical solution:

[0017] A heating layer is fixedly connected to the inner wall of the insulation layer, and a reaction tank is fixedly connected to the inner wall of the heating layer.

[0018] As a further description of the above technical solution:

[0019] The bottom of the water pump is fixedly connected to the top left side of the sealed chamber, and the bottom of the water tank is fixedly connected to the top right side of the sealed chamber.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the chlorine gas generated by the anode reaction is recycled back to the electrolytic cell after multi-stage treatment, which realizes the effective utilization and resource recovery of chlorine gas. This process not only avoids the pollution caused by the direct emission of chlorine gas to the environment, but also reduces the collection and treatment costs of chlorine gas, while ensuring the stable operation of the electrolysis process and improving the comprehensive utilization rate of resources.

[0022] 2. In this utility model, a water pump and a motor drive the fan blades to circulate and stir the molten salt, which effectively reduces the concentration polarization phenomenon. After the molten salt is fully mixed, it is circulated back to different depths below the surface of the molten salt, which promotes the uniform rise of the molten salt from multiple points at the bottom, thereby promoting the uniform distribution of ions in the molten salt, improving the efficiency of the electrolysis reaction, reducing the energy loss caused by concentration polarization, and realizing the high-efficiency and low-energy operation of the electrolysis process. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a low-energy-consumption lithium metal preparation device with an upper-mounted multi-anode electrolytic cell proposed in this utility model;

[0024] Figure 2 This is a top view of a low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell proposed in this utility model;

[0025] Figure 3 This is a side view of a low-energy-consumption lithium metal preparation device with an upper-mounted multi-anode electrolytic cell proposed in this utility model;

[0026] Figure 4 This is a partial structural diagram of the connecting plate of a low-energy-consumption lithium metal preparation device with an upper-mounted multi-anode electrolytic cell proposed in this utility model;

[0027] Figure 5 This is a partial structural diagram of the sealed chamber of a low-energy-consumption lithium metal preparation device with an upper-mounted multi-anode electrolytic cell proposed in this utility model;

[0028] Figure 6 This is a partial structural exploded view of a low-energy-consumption lithium metal preparation device with an upper-mounted multi-anode electrolytic cell proposed in this utility model.

[0029] Legend:

[0030] 1. Insulation layer; 2. Stirring mechanism; 201. Liquid bend one; 202. Water pump; 203. Liquid straight pipe; 204. Water tank; 205. Motor; 206. Fan blade; 207. Liquid bend two; 208. Liquid bend three; 3. Heating layer; 4. Reaction tank; 5. Connecting plate; 6. Sealing chamber; 7. Fan; 8. Gas pipe one; 9. Sealing plug one; 10. Reagent bottle one; 11. Gas pipe two; 12. Sealing plug two; 13. Reagent bottle two; 14. Gas pipe three; 15. Slide groove; 16. Slider; 17. Anode; 18. Cathode; 19. Collection cover; 20. Lithium-conducting tube; 21. Lithium collection chamber; 22. Terminal one; 23. Terminal two. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 4 This utility model provides an embodiment of a low-energy lithium metal preparation device with an upper-inserted multi-anode electrolytic cell, including a heat insulation layer 1, a connecting plate 5 fixedly connected to the top of the heat insulation layer 1, a plurality of sliding grooves 15 opened on the top of the connecting plate 5, a sealing chamber 6 fixedly connected near the edge of the top of the connecting plate 5, a fan 7 connected to the right side of the sealing chamber 6, a gas pipe 8 connected to the output end of the fan 7, a sealing plug 9 slidably connected to the outer wall of the gas pipe 8, a reagent bottle 10 slidably connected to the outer wall of the sealing plug 9, a gas pipe 11 slidably connected to the inner wall of the sealing plug 9, a sealing plug 12 slidably connected to the outer wall of the gas pipe 11, a reagent bottle 13 slidably connected to the outer wall of the sealing plug 12, a gas pipe 14 slidably connected to the inner wall of the sealing plug 12, and a stirring mechanism 2 fixedly connected to the left side of the heat insulation layer 1. The stirring mechanism 2 is used to promote the uniform distribution of ions in the molten salt, further reduce concentration polarization, improve electrolysis efficiency, and reduce energy consumption.

[0033] Specifically, the chute 15 allows the chlorine gas produced by the reaction to enter the sealed chamber 6. When the blower 7 is working, it extracts the gas from the sealed chamber 6 and transports it to the subsequent processing stage through the gas pipe 8 connected to the output end. The reagent bottle 10 contains saturated saline solution to remove hydrogen chloride gas mixed in with the chlorine gas. The reagent bottle 2 contains concentrated sulfuric acid, which is used to dry the gas after it has been treated by the reagent bottle 10. The gas pipe 3 leads the dried gas out of the reagent bottle 2 13 and circulates it back into the sealed chamber 6 to maintain a stable gas atmosphere.

[0034] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 5 The stirring mechanism 2 includes a liquid bend 201. The outer wall of the liquid bend 201 is fixedly connected to the left side of the insulation layer 1. A water pump 202 is connected to the top of the insulation layer 1. A liquid straight pipe 203 is connected to the right side of the water pump 202. A water tank 204 is connected to the right end of the liquid straight pipe 203. A motor 205 is fixedly connected to the top of the water tank 204. A fan blade 206 is fixedly connected to the output end of the motor 205. Multiple liquid bends 207 are connected to the rear side of the water tank 204. Multiple liquid bends 208 are connected to the front side of the water tank 204.

[0035] Specifically, the water pump 202 is the power source for the entire stirring mechanism 2, the water tank 204 provides space for the stirring and mixing of molten salt, and the second liquid bend 207 and the third liquid bend 208 are the return channels for the molten salt after stirring, circulating it back to different depths below the surface of the molten salt. This allows the molten salt to rise evenly from multiple points at the bottom, further promoting the uniform distribution of ions in the molten salt.

[0036] Please see the appendix Figure 4 and attached Figure 5 The inner wall of the chute 15 is slidably connected to a slider 16, the top front side of the connecting plate 5 is slidably connected to a cathode 18, the inner wall of the slider 16 is slidably connected to an anode 17, the top of the anode 17 is fixedly connected to a terminal 22, the top of the cathode 18 is fixedly connected to a terminal 23, and the outer wall of the cathode 18 is fixedly connected to a collection cover 19.

[0037] Specifically, the slider 16 is movable, allowing the anode 17 to be adjusted in position according to actual conditions to prevent reaction imbalance. Terminal 1 22 and terminal 2 23 are used to connect to the power supply. The collection cover 19 can cover the cathode 18 in all directions to effectively collect the deposited lithium metal.

[0038] Please see the appendix Figure 1 Appendix Figure 4 and attached Figure 6The front side of the collection cover 19 is connected to the lithium guide tube 20, the bottom end of the lithium guide tube 20 is connected to the lithium collection chamber 21, the inner wall of the insulation layer 1 is fixedly connected to the heating layer 3, the inner wall of the heating layer 3 is fixedly connected to the reaction tank 4, the bottom of the water pump 202 is fixedly connected to the top left side of the sealing chamber 6, and the bottom of the water tank 204 is fixedly connected to the top right side of the sealing chamber 6.

[0039] Specifically, the lithium-conducting tube 20 can transport lithium to the lithium-collecting chamber 21. The lithium-collecting chamber 21 has good sealing properties, which can prevent external air and moisture from entering and avoid the metallic lithium from reacting with these substances and affecting its quality and performance. The heating layer 3 can keep the molten salt at a suitable reaction temperature, so that the reaction can proceed smoothly.

[0040] Working principle: After the reaction occurs, chlorine gas is generated near the anode 17. The chlorine gas is passed through the slide 15 to the sealed chamber 6, and then enters the gas pipe 8 under the action of the fan 7 and is passed to the saturated brine in the reagent bottle 10. The hydrogen chloride gas in the chlorine gas is removed by the saturated brine. The treated chlorine gas is then passed through the gas pipe 11 to the reagent bottle 13, which contains concentrated sulfuric acid to dry the chlorine gas. Finally, the treated chlorine gas is circulated back into the electrolytic cell through the gas pipe 14 to maintain a stable gas atmosphere in the cell and reduce the cost of chlorine collection and treatment.

[0041] During electrolysis, lithium chloride is continuously consumed, and it is necessary to maintain a stable molten salt concentration to reduce concentration polarization. When the water pump 202 starts working, the molten salt enters the water tank 204 through the liquid bend 201 and the liquid straight pipe 203. At the same time, the motor 205 starts working to rotate the fan blade 206 to stir the molten salt. The stirred molten salt is circulated back to different depths below the molten salt surface through the liquid bend 207 and the liquid bend 3 208, so that the molten salt rises evenly from multiple points at the bottom, promotes the uniform distribution of ions in the molten salt, further reduces concentration polarization, improves electrolysis efficiency, and reduces energy consumption.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell, comprising a heat insulation layer (1), characterized in that: A connecting plate (5) is fixedly connected to the top of the insulation layer (1). The top of the connecting plate (5) has multiple sliding grooves (15). A sealing chamber (6) is fixedly connected to the top of the connecting plate (5) near the edge. A fan (7) is connected to the right side of the sealing chamber (6). A gas pipe (8) is connected to the output end of the fan (7). A sealing plug (9) is slidably connected to the outer wall of the gas pipe (8). A reagent bottle (10) is slidably connected to the outer wall of the sealing plug (9). Gas tube 2 (11) is slidably connected to the inner wall of the first (9), and sealing plug 2 (12) is slidably connected to the outer wall of the gas tube 2 (11). Reagent bottle 2 (13) is slidably connected to the outer wall of the sealing plug 2 (12), and gas tube 3 (14) is slidably connected to the inner wall of the sealing plug 2 (12). Stirring mechanism (2) is fixedly connected to the left side of the insulation layer (1). Stirring mechanism (2) is used to promote the uniform distribution of ions in molten salt, further reduce concentration polarization, improve electrolysis efficiency, and reduce energy consumption.

2. The low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 1, characterized in that: The stirring mechanism (2) includes a liquid bend (201), the outer wall of which is fixedly connected to the left side of the insulation layer (1), a water pump (202) is connected to the top of the insulation layer (1), a liquid straight pipe (203) is connected to the right side of the water pump (202), a water tank (204) is connected to the right end of the liquid straight pipe (203), a motor (205) is fixedly connected to the top of the water tank (204), a fan blade (206) is fixedly connected to the output end of the motor (205), a plurality of liquid bends (207) are connected to the rear side of the water tank (204), and a plurality of liquid bends (208) are connected to the front side of the water tank (204).

3. The low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 1, characterized in that: The inner wall of the chute (15) is slidably connected to a slider (16), and the top front side of the connecting plate (5) is slidably connected to a cathode (18).

4. The low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 3, characterized in that: The inner wall of the slider (16) is slidably connected to an anode (17), and the top of the anode (17) is fixedly connected to a terminal block (22).

5. The low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 3, characterized in that: The top of the cathode (18) is fixedly connected to a terminal block (23), and the outer wall of the cathode (18) is fixedly connected to a collection cover (19).

6. The low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 5, characterized in that: The front side of the collection cover (19) is connected to a lithium guide tube (20), and the bottom end of the lithium guide tube (20) is connected to a lithium collection chamber (21).

7. The low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 1, characterized in that: The inner wall of the insulation layer (1) is fixedly connected to the heating layer (3), and the inner wall of the heating layer (3) is fixedly connected to the reaction tank (4).

8. A low-energy-consumption lithium metal preparation apparatus with an upper-mounted multi-anode electrolytic cell according to claim 2, characterized in that: The bottom of the water pump (202) is fixedly connected to the top left side of the sealing chamber (6), and the bottom of the water tank (204) is fixedly connected to the top right side of the sealing chamber (6).

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