Recycling device for extracting lithium from brine

Abstract

The invention discloses a recycling device for extracting lithium from brine, and relates to the technical field of extracting lithium from brine, the recycling device comprises a heating tank, the heating tank is provided with a stirring assembly for stirring the brine in the heating tank, and the stirring assembly comprises airtight boxes arranged at the top of the heating tank at intervals; a plurality of gas conveying pipes communicating with the interior of the airtight box are arranged on the periphery of the airtight box, gas inlet one-way valves are fixedly installed on the inner walls of the ends, extending into the airtight box, of the gas conveying pipes, the other ends of the gas conveying pipes communicate with the interior of the heating tank, and stirring rods are rotatably installed on the bottom wall of the airtight box; the bottom end of the stirring rod penetrates through the top wall of the heating tank and then extends into the heating tank, and a plurality of air outlet holes are formed in the outer wall, extending into the heating tank, of the stirring rod. According to the device, brine liquid is driven by gas to move to form vortex and rotation, and the movement is beneficial to enhancing the liquidity and the mixing effect of the liquid and promoting uniform mixing of different components.

Description

Technical Field

[0001] The invention relates to the technical field of lithium extraction from brine, and in particular to a device for recycling lithium extracted from brine. Background Art

[0002] Brine extraction is mainly used to extract lithium from salt lake brine. The solvent extraction method uses brine to produce high-purity lithium chloride. The brine is concentrated by sunlight, and then the impurity boron magnesium sulfate is converted into hydrated calcium borate hydroxide with lime or calcium chloride. It is a method of directly extracting lithium from salty concentrated lake water.

[0003] The existing patent (application number: CN202321568944.X) proposes a device for recycling lithium from brine, including a base plate, a support block is fixedly installed on one side of the top surface of the base plate, and a filter box is fixedly installed on the support block, a mounting seat is symmetrically installed on the inner wall of the filter box, and an arc-shaped filter screen is fixedly installed on the mounting seat, a support cover is fixedly installed on the top surface of the base plate, and a heater is installed in the support cover, and a heating plate is fixedly installed on the heater, and a heating tank is fixedly installed on the top surface of the heating plate, and a first connecting pipe is connected between the filter box and the top of the inner cavity of the heating tank, so that the device for recycling lithium from brine can automatically clean impurities attached to and blocked on the arc-shaped filter screen, without the need for workers to manually clean it regularly, and without stopping the machine for operation, which not only reduces the labor intensity of workers but also improves work efficiency.

[0004] In the existing process of extracting lithium from brine, the brine needs to be heated and stirred. Heating the brine can increase the solubility of lithium compounds, so that more lithium can exist in the brine in a dissolved form, which is beneficial to the subsequent extraction process. However, due to the current working mode and structure of brine heating and stirring, traditional stirring equipment mainly relies on mechanical stirring structure, that is, the stirring effect is achieved through the rotation of the stirring shaft and stirring blades. However, the mechanical stirring structure has some limitations in the stirring process. The stirring area is limited. If you want to stir evenly, you need to increase the stirring time, which results in low brine heating efficiency.

[0005] In view of this, this application is hereby filed. Summary of the invention

[0006] The purpose of the present invention is to provide a device for extracting lithium from brine and recycling it to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention provides a device for recycling lithium from brine, comprising a heating tank, on which a stirring assembly for stirring brine inside the heating tank is provided; the stirring assembly comprises an airtight box arranged at intervals on the top of the heating tank, a plurality of gas pipes connected to the inside of the airtight box are arranged on the outer periphery of the airtight box, an air inlet one-way valve is fixedly installed on the inner wall of one end of the gas pipe extending to the inside of the airtight box, the other ends of the plurality of gas pipes are connected to the inside of the heating tank, a stirring rod is rotatably installed on the bottom wall of the airtight box, the bottom end of the stirring rod penetrates the top wall of the heating tank and then extends to the inside of the heating tank, and a plurality of air outlet holes are opened on the outer wall of the stirring rod extending to the inside of the heating tank; An air outlet pipe fitting is fixedly installed on the outer wall of one end of the stirring rod extending to the inside of the heating tank, and the air outlet pipe fitting includes a connecting part fixedly installed on the inner wall of the air outlet hole, an exhaust one-way valve is arranged inside the connecting part, and a hose part is fixedly connected to one end of the connecting part away from the inner wall of the air outlet hole, and an air dispersion plate is fixedly connected to the other end of the hose part away from the other end, and the air dispersion plate is provided with exhaust micropores.

[0008] Furthermore, the stirring assembly also includes a driving motor fixedly mounted on the inner bottom wall of the airtight box, a lower turntable is sealingly and rotatably mounted on the top wall of the heating tank, an upper turntable is sealingly and rotatably mounted on the inner bottom wall of the airtight box, and the stirring rod is sealingly and rotatably mounted on the upper turntable and the lower turntable.

[0009] Furthermore, the heating tank includes a tank body, a bottom end of the tank body is provided with an inlet and outlet, a sealing plate for sealing the inlet and outlet is fixedly installed at the outer end of the inlet and outlet, a jacket is fixedly installed on the outer wall of the tank body, and a liquid supply pipe and a liquid discharge pipe are fixedly installed on the outer wall of the jacket.

[0010] Furthermore, it also includes a transmission component, which includes an outer ring body fixedly mounted on the top surface of the tank body, an inner gear ring fixedly mounted on the inner wall of the outer ring body, and a transmission gear fixedly mounted on the outer wall of the stirring rod, and the transmission gear is meshed and connected with the inner gear ring. During the revolution of the stirring rod, the inner gear ring and the transmission gear are meshed and transmitted to cause the stirring rod to rotate.

[0011] Furthermore, an exhaust component is provided on the top wall of the airtight box, and the exhaust component includes an exhaust port opened on the top wall of the airtight box, an exhaust pipe is fixedly installed at the top port of the exhaust port, a mesh plate is fixedly installed at the top port of the exhaust pipe, and a sealing ball for sealing the exhaust port is slidably installed inside the exhaust pipe.

[0012] Furthermore, a support spring is fixedly installed on the bottom surface of the mesh plate, and the other end of the support spring is against the sealing ball. When the gas pressure inside the airtight box is too high and greater than the elastic force of the support spring, the gas inside the airtight box can push the sealing ball to move upward.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention; The brine inside the heating tank will generate high-temperature steam during the heating process. The steam will enter the inside of the airtight box through the gas pipe, and then flow back to the inside of the heating tank through the stirring rod. The gas flowing back to the inside of the heating tank can disturb the brine liquid inside the heating tank. When the gas is introduced into the brine liquid, it will form bubbles in the liquid. These bubbles will drive the surrounding liquid to move during the rising process, forming vortices and rotations. This movement helps to enhance the fluidity and mixing effect of the liquid and promote uniform mixing between different components. 2. The present invention; the gas discharged from the gas outlet can enter the interior of the heating tank through the gas outlet pipe fitting, and the brine inside the heating tank is prevented from entering the interior of the stirring rod by the exhaust one-way valve. The gas discharged from the gas outlet pipe fitting can be dispersed into multiple small air flows by the gas dispersion plate and the exhaust micropores, so that the gas can flow back to the interior of the heating tank evenly, and the hose part is a flexible pipe structure, which will be deformed to varying degrees due to the resistance of the brine liquid during the rotation of the stirring rod, further expanding the gas escape range and improving the stirring and mixing efficiency; 3. The present invention; when the stirring rod revolves along the inner wall of the heating tank, the transmission gear installed thereon will mesh with the internal gear ring to transmit, thereby causing the transmission gear to rotate, and the transmission gear drives the stirring rod to rotate synchronously, thereby achieving the effects of revolution and rotation of the stirring rod. The rotation can form a high-speed flow field for the brine around the stirring rod, accelerate the rate of the mixing reaction, and effectively improve the stirring efficiency and homogeneity. At the same time, the rotation can also enable the stirring rod to continuously change its angle and position during the movement, avoid dead angles, and further improve the homogeneity of the mixture. The revolution mainly plays the role of rotating the material in the heating tank outward, which helps to mix the brine more evenly during the heating and stirring process, and makes the stirring rod more effective in stirring the brine inside the heating tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 For along Figure 2 Schematic diagram of the cross-sectional structure along the middle section line BB; Figure 4 for Figure 3 A magnified view of the structure at center A; Figure 5 It is a front view structural schematic diagram of the stirring assembly in the present invention; Figure 6 It is a bottom view structural schematic diagram of the stirring assembly in the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the air outlet pipe member in the present invention.

[0015] In the figure: 1. Heating tank; 11. Tank body; 12. Inlet and outlet; 13. Sealing plate; 14. Jacket; 15. Liquid supply pipe; 16. Liquid discharge pipe; 2. Stirring assembly; 21. Air pipe; 22. Airtight box; 23. Stirring rod; 24. Air outlet; 25. Lower turntable; 26. Upper turntable; 27. Driving motor; 28. Air outlet pipe; 281. Connecting part; 282. Exhaust one-way valve; 283. Hose part; 284. Air diffuser; 285. Exhaust micropore; 3. Transmission components; 31. Outer ring body; 32. Inner gear ring; 33. Transmission gear; 4. Exhaust components; 41. Exhaust port; 42. Exhaust pipe; 43. Mesh plate; 44. Sealing ball; 45. Support spring. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-7 , the present invention provides a technical solution: a device for recycling lithium from brine, comprising a heating tank 1, on which a stirring assembly 2 for stirring brine therein is provided; The stirring assembly 2 includes an airtight box 22 arranged at intervals on the top of the heating tank 1, a plurality of air pipes 21 connected to the inside of the airtight box 22 are arranged on the outer periphery of the airtight box 22, an air inlet check valve is fixedly installed on the inner wall of one end of the airtight box 22, and the other ends of the plurality of air pipes 21 are connected to the inside of the heating tank 1, a stirring rod 23 is rotatably installed on the bottom wall of the airtight box 22, the bottom end of the stirring rod 23 penetrates the top wall of the heating tank 1 and extends to the inside of the heating tank 1, and a plurality of air outlet holes 24 are opened on the outer wall of the stirring rod 23 extending to the inside of the heating tank 1; The brine inside the heating tank 1 will generate high-temperature steam during the heating process. The steam will enter the interior of the airtight box 22 through the gas pipe 21, and then flow back to the interior of the heating tank 1 through the stirring rod 23. The gas flowing back to the interior of the heating tank 1 can disturb the brine liquid inside the heating tank 1. When the gas is introduced into the brine liquid, it will form bubbles in the liquid. These bubbles will drive the surrounding liquid to move during the rising process, forming vortices and rotation. This movement helps to enhance the fluidity and mixing effect of the liquid and promote uniform mixing between different components.

[0018] The stirring assembly 2 also includes a driving motor 27 fixedly mounted on the inner bottom wall of the airtight box 22, a lower turntable 25 is sealed and rotatably mounted on the top wall of the heating tank 1, an upper turntable 26 is sealed and rotatably mounted on the inner bottom wall of the airtight box 22, and a stirring rod 23 is sealed and rotatably mounted on the upper turntable 26 and the lower turntable 25; The lower turntable 25 can be driven to rotate by the driving motor 27, and the lower turntable 25 can drive multiple stirring rods 23 to rotate synchronously on the heating tank 1. The brine inside the heating tank 1 is stirred by the rotating stirring rods 23 to ensure the uniformity of stirring.

[0019] See also Figure 3 , Figure 6 and Figure 7 The stirring rod 23 extends to the outer wall of one end of the heating tank 1 and is fixedly installed with an air outlet pipe 28. The air outlet pipe 28 includes a connecting portion 281 fixedly installed on the inner wall of the air outlet hole 24. An exhaust one-way valve 282 is arranged inside the connecting portion 281. One end of the connecting portion 281 away from the inner wall of the air outlet hole 24 is fixedly connected with a hose portion 283. The other end of the hose portion 283 is fixedly connected with a diffuser plate 284, and the diffuser plate 284 is provided with exhaust micropores 285. The gas exhausted from the air outlet 24 can enter the interior of the heating tank 1 through the air outlet pipe 28. The exhaust one-way valve 282 is set to prevent the brine inside the heating tank 1 from entering the interior of the stirring rod 23. The gas exhausted from the air outlet pipe 28 can be dispersed into multiple small air flows through the set gas dispersion plate 284 and the exhaust micropores 285, so that the gas can flow back to the interior of the heating tank 1 evenly. The hose part 283 is a flexible tube structure. During the rotation of the stirring rod 23, it will be deformed to varying degrees due to the resistance of the brine liquid, thereby further expanding the escape range of the gas and improving the stirring and mixing efficiency.

[0020] See also Figure 1-Figure 3 The heating tank 1 comprises a tank body 11, a material inlet and outlet 12 is provided at the bottom of the tank body 11, a sealing plate 13 for sealing the material inlet and outlet 12 is fixedly installed at the outer end of the material inlet and outlet 12, a jacket 14 is fixedly installed on the outer wall of the tank body 11, and a liquid supply pipe 15 and a liquid discharge pipe 16 are fixedly installed on the outer wall of the jacket 14; The tank body 11 is used to contain brine and a stirring structure, the inlet and outlet 12 is provided to facilitate the entry and discharge of brine, the sealing plate 13 has a sealing effect, so that the heating tank 1 always remains in an airtight state, realizes air circulation, and avoids heat loss. The provided jacket 14 is convenient for heating the brine inside the heating tank 1, the liquid supply pipe 15 is convenient for adding hot water to the inside of the jacket 14, and the drain pipe 16 is convenient for discharging the hot water inside the jacket 14.

[0021] See also Figure 1-Figure 3 , Figure 5 and Figure 6 , further comprising a transmission component 3, the transmission component 3 comprising an outer ring body 31 fixedly mounted on the top surface of the tank body 11, an inner gear ring 32 fixedly mounted on the inner wall of the outer ring body 31, a transmission gear 33 fixedly mounted on the outer wall of the stirring rod 23, the transmission gear 33 meshingly connected with the inner gear ring 32, during the revolution of the stirring rod 23, the inner gear ring 32 meshes with the transmission gear 33 to transmit the stirring rod 23 to rotate; When the stirring rod 23 revolves along the inner wall of the heating tank 1, the transmission gear 33 installed thereon will mesh with the internal gear ring 32 for transmission, thereby causing the transmission gear 33 to rotate, and the transmission gear 33 drives the stirring rod 23 to rotate synchronously, thereby achieving the effects of revolution and rotation of the stirring rod 23. The rotation can form a high-speed flow field for the brine around the stirring rod 23, accelerate the rate of the mixing reaction, and effectively improve the stirring efficiency and homogeneity. At the same time, the rotation can also enable the stirring rod 23 to continuously change its angle and position during the movement, avoid dead angles, and further improve the homogeneity of the mixture. The revolution mainly plays the role of rotating the material in the heating tank 1 outward, which helps to mix the brine more evenly during the heating and stirring process, and makes the stirring rod 23 more effective in stirring the brine inside the heating tank 1.

[0022] See also Figure 1-Figure 4 An exhaust component 4 is provided on the top wall of the airtight box 22. The exhaust component 4 includes an exhaust port 41 opened on the top wall of the airtight box 22. An exhaust pipe 42 is fixedly installed at the top end of the exhaust port 41. A mesh plate 43 is fixedly installed at the top end of the exhaust pipe 42. A sealing ball 44 for blocking the exhaust port 41 is slidably installed inside the exhaust pipe 42. A support spring 45 is fixedly installed on the bottom surface of the mesh plate 43. The other end of the support spring 45 is against the sealing ball 44. When the gas pressure inside the airtight box 22 is too large and greater than the elastic force of the support spring 45, the gas inside the airtight box 22 can push the sealing ball 44 to move upward; In the process of heating brine, high-temperature steam is generated inside the heating tank 1, and the high-temperature steam continuously enters the interior of the airtight box 22 through the gas pipe 21. The steam entering the airtight box 22 will flow back to the interior of the heating tank 1 through the stirring rod 23. When the pressure of the high-temperature steam entering the airtight box 22 is greater than the elastic force of the support spring 45, the gas inside the airtight box 22 can push the sealing ball 44 to move upward. The upward movement of the sealing ball 44 can make the exhaust port 41 in an open state. The high-pressure steam inside the airtight box 22 can pass through the gap between the outer wall of the sealing ball 44 and the exhaust pipe 42 to the top of the sealing ball 44, and is discharged by the mesh plate 43. When the pressure in the airtight box 22 exceeds the preset safety value, the sealing ball 44 will automatically open and discharge part of the gas, thereby keeping the air pressure inside the airtight box 22 within a safe range. This can effectively prevent the airtight box 22 from rupturing due to overpressure or the gas from escaping from the connection between the upper turntable 26 and the airtight box 22, thereby ensuring the safety of the production process.

[0023] Working principle: the tank body 11 is used to contain brine and a stirring structure, the inlet and outlet 12 is provided to facilitate the entry and discharge of brine, the sealing plate 13 has a sealing effect, so that the heating tank 1 always remains airtight, air circulation is achieved, and heat loss is avoided. The jacket 14 is provided to facilitate heating the brine inside the heating tank 1, the liquid supply pipe 15 is used to facilitate adding hot water to the inside of the jacket 14, and the liquid discharge pipe 16 is used to facilitate the discharge of the hot water inside the jacket 14. The brine inside the heating tank 1 will generate high-temperature steam during the heating process, and the steam will enter the interior of the airtight box 22 through the gas pipe 21, and then flow back to the interior of the heating tank 1 through the stirring rod 23. The gas flowing back to the interior of the heating tank 1 can turbulent the brine liquid inside the heating tank 1.

[0024] When gas is introduced into the brine liquid, it forms bubbles in the liquid. These bubbles will drive the surrounding liquid to move during the rising process, forming vortices and rotation. This movement helps to enhance the fluidity and mixing effect of the liquid and promote uniform mixing between different components. The lower turntable 25 can be driven to rotate by the driving motor 27. The lower turntable 25 can drive multiple stirring rods 23 to rotate synchronously on the heating tank 1. The brine inside the heating tank 1 is stirred by the rotating stirring rods 23 to ensure the uniformity of stirring.

[0025] When the stirring rod 23 revolves along the inner wall of the heating tank 1, the transmission gear 33 installed thereon will mesh with the internal gear ring 32 for transmission, thereby causing the transmission gear 33 to rotate, and the transmission gear 33 drives the stirring rod 23 to rotate synchronously, thereby achieving the effects of the revolution and rotation of the stirring rod 23. The rotation can form a high-speed flow field for the brine around the stirring rod 23, accelerate the rate of the mixing reaction, and effectively improve the stirring efficiency and homogeneity. At the same time, the rotation can also enable the stirring rod 23 to continuously change its angle and position during the movement, avoid dead angles, and further improve the homogeneity of the mixture. The revolution mainly plays the role of rotating the material in the heating tank 1 outward, which is helpful for the brine to be heated and stirred. The mixing process is more uniform, so that the stirring rod 23 can stir the brine inside the heating tank 1 more effectively, and the gas discharged from the air outlet 24 can enter the interior of the heating tank 1 through the air outlet pipe 28. The exhaust one-way valve 282 is set to prevent the brine inside the heating tank 1 from entering the interior of the stirring rod 23. The gas discharged from the air outlet pipe 28 can be dispersed into multiple small air flows through the set gas dispersion plate 284 and the exhaust micropores 285, so that the gas can flow back to the interior of the heating tank 1 evenly, and the hose part 283 is a flexible tube structure. During the rotation of the stirring rod 23, it will be deformed to varying degrees due to the resistance of the brine liquid, thereby further expanding the escape range of the gas and improving the stirring and mixing efficiency.

Claims

1. A device for extracting lithium from brine and recycling it, comprising a heating tank (1), characterized in that: The heating tank (1) is provided with a stirring component (2) for stirring the brine inside the heating tank; The stirring assembly (2) comprises an airtight box (22) arranged at intervals on the top of the heating tank (1); a plurality of air supply pipes (21) connected to the interior of the airtight box (22) are arranged on the outer periphery of the airtight box (22); an air intake check valve is fixedly installed on the inner wall of one end of the air supply pipe (21) extending to the interior of the airtight box (22); the other ends of the plurality of air supply pipes (21) are connected to the interior of the heating tank (1); a stirring rod (23) is rotatably installed on the bottom wall of the airtight box (22); the bottom end of the stirring rod (23) penetrates the top wall of the heating tank (1) and extends to the interior of the heating tank (1); and a plurality of air outlet holes (24) are opened on the outer wall of the stirring rod (23) extending to the interior of the heating tank (1); An air outlet pipe (28) is fixedly mounted on the outer wall of one end of the stirring rod (23) extending to the interior of the heating tank (1), the air outlet pipe (28) comprising a connecting portion (281) fixedly mounted on the inner wall of the air outlet hole (24), an exhaust one-way valve (282) being arranged inside the connecting portion (281), a hose portion (283) being fixedly connected to one end of the connecting portion (281) away from the inner wall of the air outlet hole (24), and an air diffuser (284) being fixedly connected to the other end of the hose portion (283), the air diffuser (284) being provided with exhaust microholes (285).

2. The device for extracting lithium from brine and recycling it according to claim 1, characterized in that: The stirring assembly (2) further comprises a driving motor (27) fixedly mounted on the inner bottom wall of the airtight box (22); a lower turntable (25) is rotatably mounted on the top wall of the heating tank (1); an upper turntable (26) is rotatably mounted on the inner bottom wall of the airtight box (22); and the stirring rod (23) is rotatably mounted on the upper turntable (26) and the lower turntable (25).

3. A device for recycling lithium from brine as claimed in claim 2, characterized in that: The heating tank (1) comprises a tank body (11), a material inlet and outlet (12) being provided at the bottom end of the tank body (11), a sealing plate (13) being fixedly mounted at the outer end of the material inlet and outlet (12) for sealing the material inlet and outlet (12), a jacket (14) being fixedly mounted on the outer wall of the tank body (11), and a liquid supply pipe (15) and a liquid discharge pipe (16) being fixedly mounted on the outer wall of the jacket (14).

4. A device for recycling lithium from brine as claimed in claim 3, characterized in that: The invention also comprises a transmission component (3), the transmission component (3) comprising an outer ring body (31) fixedly mounted on the top surface of the tank body (11), an inner toothed ring (32) fixedly mounted on the inner wall of the outer ring body (31), a transmission gear (33) fixedly mounted on the outer wall of the stirring rod (23), the transmission gear (33) meshingly connected with the inner toothed ring (32), and during the process of the stirring rod (23) revolving, the inner toothed ring (32) meshes with the transmission gear (33) to cause the stirring rod (23) to rotate.

5. The device for extracting lithium from brine and recycling it according to claim 1, characterized in that: An exhaust component (4) is provided on the top wall of the airtight box (22), the exhaust component (4) comprising an exhaust port (41) opened on the top wall of the airtight box (22), an exhaust pipe (42) fixedly mounted at the top end of the exhaust port (41), a mesh plate (43) fixedly mounted at the top end of the exhaust pipe (42), and a sealing ball (44) for sealing the exhaust port (41) slidably mounted inside the exhaust pipe (42).

6. A device for extracting lithium from brine and recycling it as claimed in claim 5, characterized in that: A support spring (45) is fixedly mounted on the bottom surface of the mesh plate (43), and the other end of the support spring (45) abuts against the sealing ball (44). When the gas pressure inside the airtight box (22) is too high and greater than the elastic force of the support spring (45), the gas inside the airtight box (22) can push the sealing ball (44) to move upward.

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