Lithium carbonate recycling and purifying device

Abstract

The invention relates to the technical field of lithium carbonate recovery, and discloses a lithium carbonate recovery and purification device which comprises a reaction box, a plurality of stirring assemblies used for stirring reaction liquid are arranged at the top of the reaction box and distributed in an annular array, and a driving assembly used for driving the stirring assemblies to operate is arranged at the top of the reaction box. A gas pumping assembly used for conveying gas to the stirring assembly is arranged over the reaction box, the stirring assembly comprises a plurality of stirring rods rotationally installed on the top wall of the reaction box, and the stirring rods are hollow. The stirring assembly is driven by the driving assembly to stir reactants, meanwhile, under the action of the air pumping assembly, when the stirring rod stirs the reactants, the stirring rod can move up and down and can also stir the reactants along with air, the stirring depth and strength are effectively improved, the agglomerated reactants are dispersed more uniformly, and the stirring efficiency is improved. The contact area between reactants is greatly increased, and the reaction rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of lithium carbonate recovery, and in particular to a lithium carbonate recovery and purification device. Background Art

[0002] As the global demand for electric vehicles and energy storage equipment continues to grow, lithium batteries, as important energy storage devices, have become the main source of global lithium demand. The widespread use of lithium batteries has driven the rapid consumption of lithium resources. Waste lithium batteries and lithium-containing waste generated in industrial processes have become potential sources for recycling lithium carbonate. Recycling lithium carbonate can not only reduce the consumption of lithium resources and ease resource shortages, but also reduce environmental pollution caused by waste batteries. It is a key technology to promote circular economy and sustainable development. Through effective recycling and purification technology, not only can the utilization rate of lithium resources be improved, but also production costs can be reduced and environmental pollution can be reduced, which has important economic and social significance.

[0003] In the process of recycling lithium carbonate, the acid leaching method is often used to dissolve and separate lithium. The acid leaching method mainly converts lithium carbonate in waste into soluble lithium salt through the reaction of acid solution with waste, thereby realizing the recovery of lithium carbonate. During recycling, the waste needs to be crushed and ground into powder. After grinding, the surface of the powdered waste is relatively rough and the particles are small, which increases the surface area of ​​contact between the waste and the acid solution, and improves the reaction rate and recovery efficiency. However, when the powdered waste is in contact with the acid solution, the fine particles are easily attracted by electrostatic attraction and aggregated, especially in a humid environment. The hygroscopicity of the powder particles is enhanced, and agglomeration is prone to occur. The contact between the agglomerated waste and the acid solution becomes uneven, resulting in the acid solution not being able to fully penetrate the surface of each particle, which will reduce the efficiency of the acid leaching reaction and affect its uniformity in the acid solution. In order to avoid this situation, the reaction needs to be stirred through relevant structures to break up the agglomerated waste. However, during the mechanical stirring process, it mainly relies on the mechanical movement of rotating blades or stirring rods to promote the flow and mixing of the waste, which may only loosen part of the surface of the agglomerated waste, but cannot effectively penetrate into the interior of the agglomerate, resulting in the existence of agglomerated materials and possibly affecting the subsequent reaction process. Summary of the invention

[0004] The present application proposes a lithium carbonate recovery and purification device, which has the advantages of being able to lift reactants upward during stirring, the stirring rod being able to move up and down during stirring, the stirring rod being accompanied by gas stirring during stirring, and the gas being able to impact and crush agglomerated reactants, so as to solve the problem that traditional stirring equipment only relies on rotating blades or stirring rods to stir the reactants, resulting in agglomerated waste materials being only partially loosened but not completely crushed.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a lithium carbonate recovery and purification device, comprising a reaction box, a plurality of stirring components for stirring the reaction liquid are arranged on the top of the reaction box, and the plurality of stirring components are distributed in a ring array, a driving component for driving the plurality of stirring components to operate is arranged on the top of the reaction box, and a pump gas component for conveying gas to the stirring component is arranged directly above the reaction box;

[0006] The stirring assembly includes a plurality of stirring rods rotatably mounted on the top wall of the reaction box. The stirring rods are hollow and have spiral blades fixedly mounted on the outer sides of the stirring rods. The bottoms of the stirring rods are fixedly connected to a plurality of stirring tubes distributed in a circular array, and the tops of the stirring rods are rotatably connected to support air pipes in an airtight manner.

[0007] Furthermore, the driving assembly includes a motor fixedly mounted on the outer top wall of the reaction box, the output end of the motor is fixedly connected to a rotating shaft, the outer side of the rotating shaft is fixedly mounted with a first gear, the outer side of the stirring rod is fixedly mounted with a second gear meshing with the first gear, and the height of the second gear is greater than the height of the first gear.

[0008] Furthermore, an adjustment ring is fixedly connected to the top of the rotating shaft, a plurality of arc blocks distributed in a circular array are fixedly installed on the bottom of the adjusting ring, the supporting air pipe is made of hard material, a supporting frame is fixedly installed on the top of the supporting air pipe, and a roller is rotatably installed on the top of the supporting frame.

[0009] Furthermore, a spring is fixedly mounted on the bottom of the second gear, the spring is sleeved on the outside of the stirring rod, and the bottom end of the spring is fixedly connected to the top of the reaction box.

[0010] Furthermore, the pump air assembly includes a plurality of vertical plates fixedly mounted on the top of the reaction box, the plurality of vertical plates are distributed in a circular array, an air storage box is commonly fixedly mounted on the top of the plurality of vertical plates, an air pump is fixedly mounted on the top of the air storage box, an air inlet of the air pump is fixedly connected to the air storage box via an air inlet pipe, an air outlet of the air pump is fixedly connected to an air outlet pipe, an end of the air outlet pipe away from the air pump is fixedly connected to a shunt pipe, a plurality of air supply pipes are fixedly connected to the outside of the shunt pipe, an end of the plurality of air supply pipes away from the shunt pipe is respectively fixedly connected to corresponding supporting air pipes, and the air supply pipes are made of retractable material.

[0011] Furthermore, the top of the reaction box is fixedly connected to a plurality of connecting pipes distributed in a ring array, and one end of the connecting pipes away from the reaction box is fixedly connected to the gas storage box.

[0012] Furthermore, the stirring tube is arranged in an arc shape, and a one-way valve is fixedly installed on the inner wall of one end of the stirring tube away from the stirring rod.

[0013] The beneficial effects of the present invention are as follows:

[0014] The lithium carbonate recovery and purification device provided by the present application, when the reactants in the reaction box react, the motor drives the rotating shaft, the first gear and the second gear to rotate, thereby driving each stirring rod to rotate to stir the reactants, and when the stirring rod rotates, the spiral blades are driven to rotate to lift the reactants inside the reaction box upward, and at the same time, under the action of multiple wavy arc blocks, rollers and springs, the spiral blades and the stirring rods can move up and down while stirring the reactants, thereby avoiding the reaction The phenomenon of retention or deposition of the reactants in a local area effectively improves the depth and intensity of stirring;

[0015] At the same time, when the stirring rod and the spiral blades stir the reactants, the gas in the gas storage box is pumped into the interior of the stirring rod through the air pump, the diverter pipe and the gas delivery pipe. The gas exerts a certain degree of impact force on the reactants through the stirring pipe, and the gas in the reactants eventually overflows the reactants and re-enters the gas storage box through the connecting pipe. These gases are heated inside the reaction box to form hot air, and the hot air re-enters the reactants through the air pump. A circulating airflow is formed. The flow of the circulating airflow not only avoids heat loss, but also can effectively promote the movement of the reactants, helps to break up the agglomerated waste, makes the reactant particles dispersed more evenly, greatly increases the contact area between the reactants, and improves the reaction rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the reaction box, the motor and the second gear of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the stirring rod, spiral blades and the second gear of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the motor, the first gear and the adjustment ring of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the air storage box, air pump and air delivery pipe of the present invention.

[0023] In the figure: 1. reaction box; 2. stirring assembly; 21. stirring rod; 22. spiral blade; 23. stirring tube; 24. supporting air pipe; 25. spring; 3. driving assembly; 31. motor; 32. rotating shaft; 33. first gear; 34. adjusting ring; 341. arc block; 35. second gear; 36. supporting frame; 37. roller; 4. pump air assembly; 41. vertical plate; 42. air storage box; 43. air pump; 44. air inlet pipe; 45. air outlet pipe; 46. shunt pipe; 47. air supply pipe; 48. connecting pipe. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiment 1

[0026] See also Figures 1 to 6 A lithium carbonate recovery and purification device comprises a reaction box 1, wherein a plurality of stirring components 2 for stirring a reaction liquid are arranged on the top of the reaction box 1, and the plurality of stirring components 2 are distributed in a ring array, and a driving component 3 for driving the plurality of stirring components 2 to operate is arranged on the top of the reaction box 1, and the plurality of stirring components 2 are driven to operate by the driving component 3, and the plurality of stirring components 2 distributed in a ring array jointly stir the reaction liquid and waste material in the reaction box 1 to make the reaction of the two more thorough, and a pump gas component 4 for conveying gas to the stirring component 2 is arranged directly above the reaction box 1, and gas is conveyed into the stirring component 2 by the pump gas component 4, so that when the stirring component 2 stirs the reaction liquid and the waste material, the gas can also achieve the effect of gas stirring, and the gas has a certain impact force on the reactants in the reaction box 1, and can assist the stirring component 2 to break up the agglomerated waste material in the reaction box 1.

[0027] As a basis of this embodiment, the reaction box 1 has a discharge port (not shown in the figure) for loading and unloading materials.

[0028] See also Figure 4The stirring assembly 2 includes a plurality of stirring rods 21 rotatably mounted on the top wall of the reaction box 1. The stirring rods 21 are hollow, and a spiral blade 22 is fixedly mounted on the outer side of the stirring rods 21. The bottom of the stirring rods 21 is fixedly connected with a plurality of stirring tubes 23 distributed in a ring array. The stirring tubes 23 are arc-shaped, and a one-way valve is fixedly mounted on the inner wall of one end of the stirring tubes 23 away from the stirring rods 21. The top of the stirring rods 21 is airtightly rotatably connected with a supporting air pipe 24. The driving assembly 3 drives the plurality of stirring rods 21 to rotate. When the stirring rods 21 rotate, the spiral blades 22 are driven to rotate together. The rotation of the spiral blades 22 can not only stir the reactants, but also flip the reactants upwards to prevent part of the reactants from accumulating on the inner bottom wall of the reaction box 1 and causing an incomplete reaction. The stirring rods 2 While rotating, the pump air assembly 4 delivers air to the stirring rod 21 through the supporting air pipe 24. The air entering the stirring rod 21 through the supporting air pipe 24 impacts the reactants to a certain extent through the stirring tube 23, thereby breaking up the reactants agglomerated in the reaction box 1. The one-way valve on the inner wall of the stirring tube 23 allows the gas to be transported only in one direction toward the inside of the reaction box 1, and the reactants in the reaction box 1 will not enter the stirring rod 21 through the stirring tube 23. Under the combined effect of the pump air assembly 4 delivering gas to the stirring rod 21 and the rotation of the stirring rod 21 itself, the stirring rod 21 and the spiral blade 22 mechanically stir the reactants in the reaction box 1, and are also accompanied by gas stirring, which can break up the agglomerated waste materials, so that the stirring effect on the reactants in the reaction box 1 is better.

[0029] Embodiment 2

[0030] See also Figure 4 and Figure 5On the basis of the first embodiment, the driving assembly 3 includes a motor 31 fixedly mounted on the outer top wall of the reaction box 1, the output end of the motor 31 is fixedly connected to the rotating shaft 32, the outer side of the rotating shaft 32 is fixedly mounted with a first gear 33, the outer side of the stirring rod 21 is fixedly mounted with a second gear 35 meshing with the first gear 33, and the height of the second gear 35 is greater than the height of the first gear 33. The rotating shaft 32 and the first gear 33 are driven to rotate by the output end of the motor 31. When the first gear 33 rotates, the second gear 35 is driven to rotate through the meshing transmission, thereby driving each stirring rod 21 to rotate. In order to stir the reactants, an adjusting ring 34 is fixedly connected to the top of the rotating shaft 32, and a plurality of arc blocks 341 distributed in a circular array are fixedly installed at the bottom of the adjusting ring 34. The supporting air pipe 24 is made of hard material, and a supporting frame 36 is fixedly installed on the top of the supporting air pipe 24. A roller 37 is rotatably installed on the top of the supporting frame 36. When the rotating shaft 32 rotates, the adjusting ring 34 and the plurality of arc blocks 341 are driven to rotate. The arc setting of the plurality of arc blocks 341 makes the bottom of the plurality of arc blocks 341 resemble an undulating wave shape. When the wavy arc blocks 341 rotate, they will drive the roller 37 to rotate and adjust the roller 37. 7 is squeezed, so that the stirring rod 21 can move up and down. A spring 25 is fixedly installed at the bottom of the second gear 35. The spring 25 is sleeved on the outside of the stirring rod 21, and the bottom end of the spring 25 is fixedly connected to the top of the reaction box 1. When the stirring rod 21 is forced to move downward, the spring 25 is also compressed. Therefore, when the arc block 341 does not squeeze the roller 37, the stirring rod 21 can be reset upward under the action of the elastic force of the spring 25. Since the height of the second gear 35 is greater than the height of the first gear 33, when the stirring rod 21 drives the second gear 35 to move up and down, the first gear 33 and the second gear 33 are connected. The meshing between the gears 35 will not fail. Through the squeezing of the roller 37 by the arc block 341, when the motor 31 drives the second gear 35 and the stirring rod 21 to rotate through the first gear 33, the spiral blade 22 and the stirring tube 23 can move up and down while stirring the reactants, and can cover a wider area in the reaction box 1, thereby avoiding the reaction The phenomenon of retention or deposition of reactants in local areas can be effectively improved, and the depth and intensity of stirring can be effectively improved, so that all parts of the reactants can fully contact and participate in the reaction, thereby significantly enhancing the stirring effect and promoting the speed and efficiency of the reaction.

[0031] Embodiment 3

[0032] See also Figure 1 and Figure 6On the basis of the first embodiment, the pump gas assembly 4 includes a plurality of vertical plates 41 fixedly mounted on the top of the reaction box 1, the plurality of vertical plates 41 are distributed in a circular array, an air storage box 42 is fixedly mounted on the top of the plurality of vertical plates 41, a plurality of connecting pipes 48 distributed in a circular array are fixedly connected to the top of the reaction box 1, one end of the connecting pipes 48 away from the reaction box 1 is fixedly connected to the air storage box 42, an air pump 43 is fixedly mounted on the top of the air storage box 42, an air inlet of the air pump 43 is fixedly connected to the air storage box 42 through an air inlet pipe 44, an air outlet of the air pump 43 is fixedly connected to an air outlet pipe 45, an end of the air outlet pipe 45 away from the air pump 43 is fixedly connected to a shunt pipe 46, a plurality of air delivery pipes 47 are fixedly connected to the outside of the shunt pipe 46, and one end of the plurality of air delivery pipes 47 away from the shunt pipe 46 is fixedly connected to the corresponding supporting air pipe 24, and The gas pipe 47 is made of a retractable material or a retractable bellows or is loosely installed to adapt to the up and down movement of the stirring rod 21. The gas in the air storage box 42 is transported to the gas pipe 47 through the air outlet pipe 45 and the diversion pipe 46 by the air pump 43, and the pumping rate of the air pump 43 is proportional to the amount of reactants inside the reaction box 1. The gas in the gas pipe 47 then enters the interior of the stirring rod 21 through the supporting air pipe 24. The gas in the stirring rod 21 is transported to the reactants through the stirring pipe 23, and finally overflows the reactants to the inner top wall of the reaction box 1. These gases are heated inside the reaction box 1 to form hot air, and re-enter the interior of the gas storage box 42 through the connecting pipe 48, forming a circulating airflow to avoid waste of resources. Since the gas pipe 47 is made of a retractable material, when the stirring rod 21 moves up and down, the expansion and contraction of the gas pipe 47 ensures the normal transportation of the gas.

[0033] Working principle:

[0034] 1. When performing the recycling operation, the waste material ground into powder and the prepared reaction liquid are added into the reaction box 1, and the reaction box 1 is heated by an external device to reach the temperature required for the reaction. During the reaction, the output end of the motor 31 drives the shaft 32 and the first gear 33 to rotate. When the first gear 33 rotates, the second gear 35 is driven to rotate through meshing transmission, thereby driving each stirring rod 21 to rotate to stir the reactants. When the shaft 32 rotates, the adjusting ring 34 and the plurality of arc blocks 341 are driven to rotate. When the plurality of wavy arc blocks 341 rotate, the roller 37 is squeezed, thereby enabling the stirring rod 21 to move up and down. When the motor 31 drives the second gear 35 and the stirring rod 21 to rotate through the first gear 33, the spiral blade 22 and the stirring tube 23 can move up and down while stirring the reactants, thereby covering a wider area in the reaction box 1, thereby avoiding the reactionants from being retained or deposited in a local area, and effectively improving the depth and intensity of stirring.

[0035] 2. While the stirring rod 21, the spiral blade 22 and the stirring tube 23 are stirring the reactants, the gas in the air storage box 42 is transported to the gas delivery pipe 47 through the gas outlet pipe 45 and the diverter pipe 46 by the air pump 43. The gas in the gas delivery pipe 47 then enters the interior of the stirring rod 21 through the supporting gas pipe 24. The air entering the interior of the stirring rod 21 through the supporting gas pipe 24 exerts a certain degree of impact force on the reactants through the stirring tube 23. The one-way valve on the inner wall of the stirring tube 23 allows the gas to be transported only in one direction toward the interior of the reaction box 1, and the reactants in the reaction box 1 will not enter the stirring rod 21 through the stirring tube 23. Such air flow can not only effectively promote The movement of the reactants also helps to break up the agglomerated waste materials, making the reactant particles more evenly dispersed, greatly increasing the contact area between the reactants, improving the reaction rate, and effectively reducing the probability of incomplete reaction or local slow reaction due to agglomeration of the waste materials. The gases in the reactants eventually overflow the reactants to the inner top wall of the reaction box 1 and re-enter the air storage box 42 through the connecting pipe 48. These gases are heated inside the reaction box 1 to form hot air, and the hot air re-enters the reactants through the air pump 43, forming a circulating airflow, and its dissipation in the reactants further makes the heating more uniform. The circulating airflow also avoids heat loss.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lithium carbonate recovery and purification device, characterized in that: The invention comprises a reaction box (1), wherein a plurality of stirring components (2) for stirring a reaction liquid are arranged on the top of the reaction box (1), and the plurality of stirring components (2) are distributed in a ring array, a driving component (3) for driving the plurality of stirring components (2) to operate is arranged on the top of the reaction box (1), and a pumping component (4) for conveying gas to the stirring components (2) is arranged directly above the reaction box (1); The stirring assembly (2) comprises a plurality of stirring rods (21) rotatably mounted on the top wall of the reaction box (1); the stirring rods (21) are hollow, a spiral blade (22) is fixedly mounted on the outer side of the stirring rods (21), a plurality of stirring tubes (23) distributed in a ring array are fixedly connected to the bottom of the stirring rods (21), and a supporting air pipe (24) is rotatably connected to the top of the stirring rods (21) in an airtight manner.

2. The lithium carbonate recovery and purification device according to claim 1, characterized in that: The driving assembly (3) comprises a motor (31) fixedly mounted on the outer top wall of the reaction box (1); the output end of the motor (31) is fixedly connected to a rotating shaft (32); a first gear (33) is fixedly mounted on the outer side of the rotating shaft (32); a second gear (35) meshing with the first gear (33) is fixedly mounted on the outer side of the stirring rod (21); and the height of the second gear (35) is greater than the height of the first gear (33).

3. The lithium carbonate recovery and purification device according to claim 2, characterized in that: The top end of the rotating shaft (32) is fixedly connected to an adjusting ring (34), the bottom end of the adjusting ring (34) is fixedly mounted with a plurality of arc-shaped blocks (341) distributed in a ring array, the supporting air pipe (24) is made of a hard material, the top end of the supporting air pipe (24) is fixedly mounted with a supporting frame (36), and the top end of the supporting frame (36) is rotatably mounted with a roller (37).

4. The lithium carbonate recovery and purification device according to claim 2, characterized in that: A spring (25) is fixedly mounted on the bottom of the second gear (35), the spring (25) is sleeved on the outside of the stirring rod (21), and the bottom end of the spring (25) is fixedly connected to the top of the reaction box (1).

5. The lithium carbonate recovery and purification device according to claim 1, characterized in that: The pump air assembly (4) comprises a plurality of vertical plates (41) fixedly mounted on the top of the reaction box (1), the plurality of vertical plates (41) being distributed in a circular array, an air storage box (42) being fixedly mounted on the top of the plurality of vertical plates (41), an air pump (43) being fixedly mounted on the top of the air storage box (42), an air inlet of the air pump (43) being fixedly connected to the air storage box (42) via an air inlet pipe (44), an air outlet of the air pump (43) being fixedly connected to an air outlet pipe (45), an end of the air outlet pipe (45) away from the air pump (43) being fixedly connected to a shunt pipe (46), an outer side of the shunt pipe (46) being fixedly connected to a plurality of air supply pipes (47), an end of the plurality of air supply pipes (47) away from the shunt pipe (46) being fixedly connected to a corresponding supporting air pipe (24), and the air supply pipe (47) being made of a retractable material.

6. The lithium carbonate recovery and purification device according to claim 5, characterized in that: The top of the reaction box (1) is fixedly connected to a plurality of connecting pipes (48) distributed in a ring array, and the ends of the connecting pipes (48) away from the reaction box (1) are fixedly connected to the gas storage box (42).

7. The lithium carbonate recovery and purification device according to claim 1, characterized in that: The stirring tube (23) is arranged in an arc shape, and a one-way valve is fixedly installed on the inner wall of one end of the stirring tube (23) away from the stirring rod (21).

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