A lithium recovery device from waste electrolyte of lithium batteries

Abstract

This invention discloses a lithium recovery device from waste lithium battery electrolyte, relating to the field of centrifugal extraction technology. It includes three support legs, with an extraction tower fixedly mounted on top of each support leg. A top cover is fixedly mounted on top of the extraction tower, and an adjustment mechanism is mounted on top of the top cover. This invention, through the arrangement of a third wedge block, an adjusting motor, a U-shaped sliding plate, a first conical block, an adjusting spring, a slider, an L-shaped adjusting rod, and a second conical block, achieves an adaptive reduction in centrifugal speed as temperature increases. Combined with centrifugal shaft speed adjustment, this ensures that even in high-temperature environments, reducing the centrifugal shaft speed prevents continuous temperature increases. Furthermore, increasing the centrifugal shaft length ensures centrifugal efficiency while preventing excessively high extraction tower temperatures that could lead to emulsification of the internal extract. This avoids damage to the extraction tower caused by continuous temperature rise, thus extending the tower's lifespan. The device is highly applicable and worthy of widespread adoption.

Description

Technical Field

[0001] This invention relates to the field of centrifugal extraction technology, specifically to a device for recovering lithium from waste electrolyte of lithium batteries. Background Technology

[0002] In industrial processes, lithium extraction from waste electrolytes typically employs mechanical methods, high-temperature treatment, or extraction to separate lithium ions. Waste electrolyte extraction is the most widely used method due to its advantages: high lithium yield, high lithium product purity, large processing capacity, short process, low investment, and ease of industrialization. This method utilizes a centrifugal extractor as the core extraction equipment and an extraction system containing a composite extractant. Extraction of the lithium-containing solution is performed under high pH conditions, achieving highly efficient lithium extraction and separating it from numerous impurity elements such as sodium, potassium, and boron.

[0003] Patent CN116422006A discloses a centrifugal extractor, which includes a first flow channel, a second flow channel, a sixth chamber, and a fifth chamber. The sixth chamber is rotatable for centrifugal extraction of a mixture. The heavy phase liquid extracted by centrifugation is discharged through the first flow channel, and the light phase liquid extracted by centrifugation is discharged through the second flow channel. The light phase liquid mixed with the heavy phase liquid in the first flow channel is discharged into the fifth chamber, and the heavy phase liquid mixed with the light phase liquid in the second flow channel is discharged into the fifth chamber. The fifth chamber re-enters the stored mixture into the sixth chamber for centrifugal extraction. The fifth chamber is set up to collect the mixture of heavy phase liquid and light phase liquid that was not completely extracted by centrifugation, and the mixture is re-centrifuged and extracted through the fifth chamber to improve the effect of centrifugal extraction.

[0004] The aforementioned device re-extracts incompletely extracted mixed liquids through multiple chambers, improving the centrifugal extraction effect. However, many factors influence the actual extraction effect, including rotational speed, ambient temperature, and the diameter and length of the drum. Especially in summer, the machine has difficulty dissipating heat, requiring operators to constantly monitor the machine temperature and adjust the centrifugal speed accordingly. This not only significantly increases the workload of operators but also increases the risk of overheating and damage due to human oversight. Furthermore, temperatures exceeding the optimal extraction temperature can disrupt the mixing and extraction of the internal liquids. Existing technologies mostly achieve cooling by increasing heat dissipation or reducing centrifugal speed. However, due to the large size of the device, the cost of adding heat dissipation devices increases significantly, making widespread use difficult. Reducing the rotational speed directly leads to a decrease in centrifugal efficiency, increasing working time costs. Summary of the Invention

[0005] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide a lithium recovery device from waste electrolyte of lithium batteries to solve the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lithium recovery device for waste electrolyte from lithium batteries, comprising three support legs, an extraction tower fixedly mounted on the top of the three support legs, a top cover fixedly mounted on the top of the extraction tower, an adjustment mechanism mounted on the top of the top cover, a protective shell mounted on the top of the top cover, a centrifugal shaft fixedly mounted at the bottom of the adjustment mechanism, a baffle plate fixedly mounted on the outer wall of the centrifugal shaft, a mixing mechanism fixedly mounted at the end of the centrifugal shaft, a fixed disk fixedly mounted at the bottom of the mixing mechanism, four connecting columns fixedly mounted on the top of the fixed disk, a rotating drum fixedly mounted on the top of the four connecting columns, a light phase outlet mounted on the top of the rotating drum, a light phase weir plate rotatably mounted on the top of the rotating drum, a heavy phase outlet mounted on the side wall of the top of the rotating drum, a heavy phase weir plate rotatably mounted on the top of the rotating drum, four shock-absorbing springs mounted at the bottom of the fixed disk, an overheat protection mechanism mounted on the side wall of the extraction tower, a light phase inlet fixedly mounted on the side wall of the extraction tower, a heavy phase inlet fixedly mounted on the side wall of the extraction tower, and a rotating ring rotatably mounted at the bottom of the fixed disk.

[0007] Preferably, the overheat protection mechanism includes a first rack, a first wedge block, three baffles, three second wedge blocks, a heat-conducting block, a piston plate, a liquid storage box, an L-shaped connecting rod, a mounting plate, a second rack, a second gear, a first gear, and a rotating shaft. The rotating shaft is rotatably mounted at the bottom of the rotating ring. The mounting plate is fixedly mounted on the outer wall of the extraction tower. The liquid storage box is fixedly mounted on the side wall of the mounting plate. The piston plate is slidably mounted inside the liquid storage box. The L-shaped connecting rod is fixedly mounted on the top of the piston plate. The second rack is fixedly mounted at the end of the L-shaped connecting rod. The first gear and the second gear are both rotatably mounted on the side wall of the mounting plate and are coaxially and fixedly connected. The first wedge block is slidably mounted on the side wall of the mounting plate. The first rack is fixedly mounted on the top of the first wedge block. The three baffles are inserted into the side wall of the extraction tower. The three second wedge blocks are respectively fixedly mounted on the side walls of the three baffles. The two ends of the heat-conducting block are respectively fixedly mounted on the outer wall of the extraction tower and the side wall of the liquid storage box.

[0008] Preferably, the liquid storage box contains kerosene located below the piston plate.

[0009] Preferably, the adjustment mechanism includes a third wedge block, an adjustment motor, a U-shaped sliding plate, a first conical block, an adjustment spring, a slider, an L-shaped adjustment rod, and a second conical block. The L-shaped adjustment rod is rotatably sleeved on the side wall of the centrifugal shaft. The third wedge block is fixedly mounted on the top of the L-shaped adjustment rod. The second conical block is fixedly mounted on the top of the centrifugal shaft. The U-shaped sliding plate is slidably mounted on the top of the top cover. The adjustment motor is fixedly mounted on the top of the U-shaped sliding plate. The first conical block is fixedly mounted on the output shaft of the adjustment motor. The slider is rotatably mounted on the end of the output shaft of the adjustment motor. The adjustment spring is fixedly mounted on the side wall of the slider.

[0010] Preferably, the first conical block and the second conical block mesh with each other, and the third wedge block abuts against the U-shaped sliding plate.

[0011] Preferably, the mixing mechanism includes five mixing plates, five mixing shafts, five first bevel gears, two bevel gears, a limiting block, a mixing column, and a protective cover. The mixing column is fixedly installed at the bottom of the extraction tower, the second bevel gears are rotatably installed on the top of the fixed plate, the protective cover is fixedly installed on the top of the fixed plate, the five mixing shafts are rotatably installed in a circular array on the side wall of the protective cover, the five mixing plates are respectively fixedly installed at one end of the five mixing shafts, the five first bevel gears are respectively fixedly installed at the other end of the five mixing shafts, a circular hole is provided at the center of the second bevel gear, and the limiting block is installed on the side wall of the circular hole.

[0012] Preferably, the sidewall of the mixing column is provided with a spiral groove for the sliding of the limiting block, and all five first bevel gears mesh with the second bevel gears.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) By setting up a third wedge block, an adjusting motor, a U-shaped sliding plate, a first conical block, an adjusting spring, a slider, an L-shaped adjusting rod, and a second conical block, this invention achieves an adaptive reduction in centrifugal speed as the temperature rises. Combined with centrifugal shaft speed adjustment, it ensures that in high-temperature environments, the temperature is prevented from rising continuously by reducing the centrifugal shaft speed. Furthermore, the centrifugal efficiency is ensured by increasing the centrifugal length of the centrifugal shaft, while avoiding the problem of emulsification of the internal extract liquid due to excessively high temperature in the extraction tower. This also prevents damage to the extraction tower caused by continuous temperature rise, thus ensuring the service life of the extraction tower. It has strong applicability and is worth promoting.

[0015] (2) The present invention, through the arrangement of a first rack, a first wedge block, three baffles, three second wedge blocks, a heat-conducting block, a piston plate, a liquid storage box, an L-shaped connecting rod, a mounting plate, a second rack, a second gear, a first gear and a rotating shaft, realizes the adjustment of the length of the centrifugal shaft and the rotating drum by sensing the temperature inside the extraction tower, thereby increasing the centrifugal efficiency of the device. Through the setting of the shock-absorbing spring, it also realizes the downward movement of the centrifugal shaft, squeezing the shock-absorbing spring, increasing its shock absorption performance, and avoiding the increase in centrifugal vibration caused by the extension of the centrifugal shaft, which affects the centrifugal extraction effect.

[0016] (3) The present invention achieves the effect of increasing the shearing effect between the mixed extract and the waste electrolyte by changing the tilt angle of the mixing plate through the setting of five mixing plates, five mixing shafts, five first bevel gears, two bevel gears, limiting blocks, mixing columns and protective covers. It can also be adjusted according to the rotation speed to avoid over-mixing or incomplete mixing and improve the efficiency of subsequent centrifugal separation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

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

[0019] Figure 3 This is a cross-sectional view of the overheat protection mechanism of the present invention;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the rotating ring of the present invention;

[0021] Figure 5 This is a schematic diagram of the adjustment mechanism structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the hybrid mechanism structure of the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0024] In the diagram: 1. Extraction tower; 2. Light phase inlet; 3. Heavy phase inlet; 4. Overheat protection mechanism; 41. First rack; 42. First wedge block; 43. Baffle; 44. Second wedge block; 45. Heat-conducting block; 46. Piston plate; 47. Liquid storage box; 48. L-shaped connecting rod; 49. Mounting plate; 410. Second rack; 411. Second gear; 412. First gear; 413. Rotating shaft; 5. Mixing mechanism; 51. Mixing plate; 52. Mixing shaft; 53. First bevel gear; 54. Second bevel gear; 55. Limiting block; 56. 57. Mixing column; 78. Protective cover; 79. Adjusting mechanism; 70. Third wedge block; 71. Adjusting motor; 72. U-shaped sliding plate; 73. First cone block; 74. Adjusting spring; 75. Slider; 76. L-shaped adjusting rod; 77. Second cone block; 8. Protective shell; 90. Heavy phase outlet; 91. Heavy phase weir plate; 10. Light phase outlet; 11. Light phase weir plate; 12. Support leg; 13. Top cover; 14. Centrifugal shaft; 15. Baffle plate; 16. Rotating drum; 17. Fixed plate; 18. Shock-absorbing spring; 19. Connecting column; 10. Rotating ring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-7An embodiment of the present invention provides a lithium recovery device for waste electrolyte from lithium batteries, comprising three support legs 11, an extraction tower 1 fixedly mounted on the top of the three support legs 11, a top cover 12 fixedly mounted on the top of the extraction tower 1, an adjustment mechanism 7 mounted on the top of the top cover 12, a protective shell 8 mounted on the top of the top cover 12, a centrifugal shaft 13 fixedly mounted at the bottom of the adjustment mechanism 7, a baffle plate 14 fixedly mounted on the outer wall of the centrifugal shaft 13, a mixing mechanism 5 fixedly mounted at the end of the centrifugal shaft 13, a fixed disk 16 fixedly mounted at the bottom of the mixing mechanism 5, and a top of the fixed disk 16... The extraction tower 1 is equipped with four connecting columns 18, and a rotating drum 15 is fixedly mounted on the top of each of the four connecting columns 18. A light phase outlet 10 is provided on the top of the rotating drum 15, and a light phase weir plate 101 is rotatably mounted on the top of the rotating drum 15. A heavy phase outlet 9 is provided on the top side wall of the rotating drum 15, and a heavy phase weir plate 91 is rotatably mounted on the top of the rotating drum 15. Four shock-absorbing springs 17 are provided at the bottom of the fixed disk 16. An overheat protection mechanism 4 is provided on the side wall of the extraction tower 1. A light phase inlet 2 is fixedly mounted on the side wall of the extraction tower 1, and a heavy phase inlet 3 is fixedly mounted on the side wall of the extraction tower 1. A rotating ring 19 is rotatably mounted at the bottom of the fixed disk 16. First, the waste electrolyte and extractant are injected into the extraction tower 1 through the heavy phase inlet 3 and the light phase inlet 2, respectively. Then, the centrifugal shaft 13 and the drum 15 are driven to rotate synchronously by the regulating mechanism 7. Simultaneously, the mixing mechanism 5 is driven by the regulating mechanism 7 to mix the extractant and the waste electrolyte evenly. As the temperature continues to rise, the centrifugal shaft 13 and the drum 15 are driven to move downward synchronously by the overheat protection mechanism 4. It is worth noting that the top and middle of the drum 15 are telescopic structures. The speed of the regulating mechanism 7 is controlled by the three gears of the overheat protection mechanism 4, thereby reducing the speed of the centrifugal shaft 13. The downward movement of the centrifugal shaft 13 synchronously changes the mixing angle of the mixing mechanism 5, thereby increasing the shear mixing effect of the mixing mechanism 5 and the drum 15 on the extractant and the waste electrolyte. This ensures that a certain mixing effect can still be maintained even when the speed is reduced. Through the rotation of the centrifugal shaft 13 and the drum 15, the light phase and the heavy phase are separated and flow out from the light phase outlet 10 and the heavy phase outlet 9, respectively, so that lithium ions can be separated and extracted.

[0027] Specifically, the overheat protection mechanism 4 includes a first rack 41, a first wedge block 42, three baffles 43, three second wedge blocks 44, a heat-conducting block 45, a piston plate 46, a liquid storage box 47, an L-shaped connecting rod 48, a mounting plate 49, a second rack 410, a second gear 411, a first gear 412, and a rotating shaft 413. The rotating shaft 413 is rotatably mounted at the bottom of the rotating ring 19. The mounting plate 49 is fixedly mounted on the outer wall of the extraction tower 1. The liquid storage box 47 is fixedly mounted on the side wall of the mounting plate 49. The piston plate 46 is slidably mounted inside the liquid storage box 47. The L-shaped connecting rod 48 is fixedly mounted on the piston plate 49. At the top of the 6th section, the second rack 410 is fixedly mounted at the end of the L-shaped connecting rod 48. The first gear 412 and the second gear 411 are both rotatably mounted on the side wall of the mounting plate 49, and the first gear 412 and the second gear 411 are coaxially fixedly connected. The first wedge block 42 is slidably mounted on the side wall of the mounting plate 49. The first rack 41 is fixedly mounted on the top of the first wedge block 42. The three baffles 43 are inserted into the side wall of the extraction tower 1. The three second wedge blocks 44 are respectively fixedly mounted on the side walls of the three baffles 43. The two ends of the heat-conducting block 45 are respectively fixedly mounted on the outer wall of the extraction tower 1 and the side wall of the liquid storage box 47. The piston plate 46 drives the L-shaped connecting rod 48 to move upward, which in turn drives the second rack 410 to move upward. The second rack 410 then drives the second gear 411 to rotate, which in turn drives the first gear 412 to rotate synchronously. The rotation of the first gear 412 drives the first rack 41 to move downward, which in turn drives the first wedge block 42 to move downward synchronously. The first wedge block 42 then moves downward and contacts the second wedge block 44, which in turn drives the baffle 43 to be pulled out. The removal of the baffle 43 releases the resistance to rotation. The limiting position of ring 19 allows the centrifugal shaft 13 and drum 15 to move down a certain distance synchronously under the action of gravity, which in turn drives the fixed ring to move down and compress the damping spring 17. This enables the length of the centrifugal shaft 13 and drum 15 to be adjusted by sensing the temperature inside the extraction tower 1, thereby increasing the centrifugation efficiency of the device. The damping spring 17 is also designed to compress the damping spring 17 as the centrifugal shaft 13 moves down, increasing its damping performance and preventing the centrifugal vibration caused by the extension of the centrifugal shaft 13 from affecting the centrifugal extraction effect.

[0028] Specifically, the liquid storage box 47 contains kerosene located below the piston plate 46. Heat is transferred from inside the extraction tower 1 through the heat-conducting block 45, and the kerosene expands due to heat, causing the piston plate 46 to move upward.

[0029] Specifically, the adjustment mechanism 7 includes a third wedge block 71, an adjustment motor 72, a U-shaped sliding plate 73, a first conical block 74, an adjustment spring 75, a slider 76, an L-shaped adjustment rod 77, and a second conical block 78. The L-shaped adjustment rod 77 is rotatably sleeved on the side wall of the centrifugal shaft 13. The third wedge block 71 is fixedly mounted on the top of the L-shaped adjustment rod 77. The second conical block 78 is fixedly mounted on the top of the centrifugal shaft 13. The U-shaped sliding plate 73 is slidably mounted on the top of the top cover 12. The adjustment motor 72 is fixedly mounted on the top of the U-shaped sliding plate 73. The first conical block 74 is fixedly mounted on the output shaft of the adjustment motor 72. The slider 76 is rotatably mounted on the end of the output shaft of the adjustment motor 72. The adjustment spring 75 is fixedly mounted on the side wall of the slider 76. The centrifugal shaft 13 moves downward, causing the second conical block 78 and the L-shaped adjusting rod 77 to move downward. The L-shaped adjusting rod 77 moves downward, causing the third wedge block 71 to move downward. The third wedge block 71 moves downward, contacting the U-shaped sliding plate 73. The movement of the U-shaped sliding plate 73 causes the adjusting motor 72 and the first conical block 74 to move synchronously, thus ensuring that the first conical block 74 and the second conical block 78 always maintain meshing transmission. After adjustment, the output shaft of the adjusting motor 72 rotates, driving the centrifugal shaft 13 and the drum 15 to rotate for centrifugal separation of internal lithium ions. This achieves adaptive reduction of centrifugal speed as the temperature rises. Combined with the speed adjustment of the centrifugal shaft 13, it ensures that in high-temperature environments, the temperature is prevented from rising continuously by reducing the speed of the centrifugal shaft 13. Furthermore, the increased centrifugal length of the centrifugal shaft 13 ensures centrifugal efficiency while preventing the extraction tower 1 from becoming too hot and causing emulsification of the internal extract. This avoids damage to the extraction tower 1 caused by continuous temperature rise, ensuring the service life of the extraction tower 1. It has strong applicability and is worth promoting.

[0030] Specifically, the first conical block 74 and the second conical block 78 mesh with each other, and the third wedge block 71 abuts against the U-shaped sliding plate 73.

[0031] Specifically, the mixing mechanism 5 includes five mixing plates 51, five mixing shafts 52, five first bevel gears 53, two bevel gears 54, a limiting block 55, a mixing column 56, and a protective cover 57. The mixing column 56 is fixedly installed at the bottom of the extraction tower 1. The second bevel gears 54 are rotatably installed on the top of the fixed disk 16. The protective cover 57 is fixedly installed on the top of the fixed disk 16. The five mixing shafts 52 are arranged in a circular array and rotatably installed on the side wall of the protective cover 57. The five mixing plates 51 are respectively fixedly installed at one end of the five mixing shafts 52. The five first bevel gears 53 are respectively fixedly installed at the other end of the five mixing shafts 52. A circular hole is provided at the center of the second bevel gear 54. The limiting block 55 is installed on the side wall of the circular hole. The centrifugal shaft 13 moves downward, causing the fixed plate 16 and the protective cover 57 to move downward simultaneously. The protective cover 57 moves downward, causing the second bevel gear 54 to move downward. The second bevel gear 54 moves downward, causing the limiting block 55 to move downward simultaneously. The limiting block 55 moves downward and rotates along the mixing column 56. The rotation of the second bevel gear 54 causes the first bevel gear 53 to rotate. The rotation of the first bevel gear 53 causes the mixing shaft 52 and the mixing plate 51 to rotate synchronously. This achieves the effect of increasing the shearing effect between the mixed extract and the waste electrolyte by changing the tilt angle of the mixing plate 51. It can be adaptively adjusted according to the rotation speed to avoid over-mixing or incomplete mixing, thereby improving the efficiency of subsequent centrifugal separation.

[0032] Specifically, the sidewall of the mixing column 56 is provided with a spiral groove for the sliding of the limiting block 55, and all five first bevel gears 53 mesh with the second bevel gears 54.

[0033] Working principle: First, the waste electrolyte and extractant are injected into the extraction tower 1 through the heavy phase inlet 3 and the light phase inlet 2, respectively. Then, by adjusting the output shaft of the motor 72, the centrifugal shaft 13 and the drum 15 rotate synchronously, which in turn drives the mixing plate 51 to rotate, mixing the extractant and waste electrolyte evenly. As the temperature continues to rise, the overheat protection mechanism 4 drives the centrifugal shaft 13 and the drum 15 to move downward synchronously. It is worth noting that the top and middle of the drum 15 are telescopic structures. The piston plate 46 drives the L-shaped connecting rod 48 to move upward, and the upward movement of the connecting rod drives the second rack 410 to move upward. The second rack 410 moves upward, causing the second gear 411 to rotate. The rotation of the second gear 411 causes the first gear 412 to rotate synchronously. The rotation of the first gear 412 causes the first rack 41 to move downward. The downward movement of the first rack 41 causes the first wedge block 42 to move downward synchronously. The downward movement of the first wedge block 42 abuts against the second wedge block 44. The second wedge block 44 causes the baffle 43 to be pulled out. The removal of the baffle 43 releases the restriction on the rotating ring 19, thereby causing the centrifugal shaft 13 and the drum 15 to move downward synchronously a certain distance under the action of gravity. This synchronously causes the fixed ring to move downward, compressing the shock-absorbing spring 17 and increasing its shock absorption performance. The downward movement of the centrifugal shaft 13 causes the second conical block 78 and the L-shaped adjusting rod 77 to move downwards. The downward movement of the L-shaped adjusting rod 77 causes the third wedge block 71 to move downwards. The downward movement of the third wedge block 71 abuts against the U-shaped sliding plate 73, which moves. The movement of the U-shaped sliding plate 73 causes the adjusting motor 72 and the first conical block 74 to move synchronously, thus ensuring that the first conical block 74 and the second conical block 78 are always engaged. After adjustment, the output shaft of the adjusting motor 72 rotates, causing the centrifugal shaft 13 and the drum 15 to rotate and centrifuge the internal lithium ions for separation. The downward movement of the centrifugal shaft 13 causes the fixed plate 16 and the protective cover 57 to move downwards synchronously. The protective cover 57 moves downward, causing the second bevel gear 54 to move downward. The second bevel gear 54 moves downward, causing the limiting block 55 to move downward synchronously. The limiting block 55 moves downward and rotates along the mixing column 56. The rotation of the second bevel gear 54 causes the first bevel gear 53 to rotate. The rotation of the first bevel gear 53 causes the mixing shaft 52 and the mixing plate 51 to rotate synchronously, so that a certain mixing effect can still be maintained even when the speed is reduced. Through the rotation of the centrifugal shaft 13 and the drum 15, the light phase and the heavy phase are separated and flow out from the light phase outlet 10 and the heavy phase outlet 9 respectively, so that lithium ions can be separated and extracted.

[0034] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A device for recovering lithium from waste electrolyte of lithium batteries, characterized in that: The device includes three supporting legs, with an extraction tower fixedly mounted on top of each leg. A top cover is fixedly mounted on top of the extraction tower. The top cover has an adjusting mechanism and a protective shell. A centrifugal shaft is fixedly mounted at the bottom of the adjusting mechanism. A baffle plate is fixedly mounted on the outer wall of the centrifugal shaft. A mixing mechanism is fixedly mounted at the end of the centrifugal shaft. A fixed disk is fixedly mounted at the bottom of the mixing mechanism. Four connecting columns are mounted on top of the fixed disk. A drum is fixedly mounted on top of the four connecting columns. A light phase outlet is mounted on top of the drum. A light phase weir is rotatably mounted on top of the drum. A heavy phase outlet is mounted on the side wall of the drum. A heavy phase weir is rotatably mounted on top of the drum. Four damping springs are mounted at the bottom of the fixed disk. An overheat protection mechanism is provided on the side wall of the extraction tower. A light phase inlet and a heavy phase inlet are fixedly mounted on the side wall of the extraction tower. A rotating ring is rotatably mounted at the bottom of the fixed disk. The overheat protection mechanism includes… The extraction tower comprises a first rack, a first wedge block, three baffles, three second wedge blocks, a heat-conducting block, a piston plate, a liquid storage box, an L-shaped connecting rod, a mounting plate, a second rack, a second gear, a first gear, and a rotating shaft. The rotating shaft is rotatably mounted at the bottom of a rotating ring. The mounting plate is fixedly mounted on the outer wall of the extraction tower. The liquid storage box is fixedly mounted on the side wall of the mounting plate. The piston plate is slidably mounted inside the liquid storage box. The L-shaped connecting rod is fixedly mounted on the top of the piston plate. The second rack is fixedly mounted at the end of the L-shaped connecting rod. The first gear and the second gear are both rotatably mounted on the side wall of the mounting plate and are coaxially and fixedly connected. The first wedge block is slidably mounted on the side wall of the mounting plate. The first rack is fixedly mounted on the top of the first wedge block. The three baffles are inserted into the side wall of the extraction tower. The three second wedge blocks are respectively fixedly mounted on the side walls of the three baffles. The two ends of the heat-conducting block are respectively fixedly mounted on the outer wall of the extraction tower and the side wall of the liquid storage box. The liquid storage box, located below the piston plate, contains kerosene.

2. The lithium recovery device for waste electrolyte from lithium batteries according to claim 1, characterized in that: The adjustment mechanism includes a third wedge block, an adjustment motor, a U-shaped sliding plate, a first conical block, an adjustment spring, a slider, an L-shaped adjustment rod, and a second conical block. The L-shaped adjustment rod is rotatably sleeved on the side wall of the centrifugal shaft. The third wedge block is fixedly mounted on the top of the L-shaped adjustment rod. The second conical block is fixedly mounted on the top of the centrifugal shaft. The U-shaped sliding plate is slidably mounted on the top of the top cover. The adjustment motor is fixedly mounted on the top of the U-shaped sliding plate. The first conical block is fixedly mounted on the output shaft of the adjustment motor. The slider is rotatably mounted on the end of the output shaft of the adjustment motor. The adjustment spring is fixedly mounted on the side wall of the slider.

3. The lithium recovery device in waste electrolyte of lithium batteries according to claim 2, characterized in that: The first and second conical blocks mesh with each other, and the third wedge block abuts against the U-shaped sliding plate.

4. The lithium recovery device for waste electrolyte from lithium batteries according to claim 1, characterized in that: The mixing mechanism includes five mixing plates, five mixing shafts, five first bevel gears, five second bevel gears, a limiting block, a mixing column, and a protective cover. The mixing column is fixedly installed at the bottom of the extraction tower. The second bevel gears are rotatably installed on the top of the fixed plate. The protective cover is fixedly installed on the top of the fixed plate. The five mixing shafts are arranged in a circular array and rotatably installed on the side wall of the protective cover. The five mixing plates are respectively fixedly installed at one end of the five mixing shafts. The five first bevel gears are respectively fixedly installed at the other end of the five mixing shafts. A circular hole is provided at the center of the second bevel gear. The limiting block is installed on the side wall of the circular hole.

5. The lithium recovery device for waste lithium battery electrolyte according to claim 4, characterized in that: The sidewall of the mixing column is provided with a spiral groove for the sliding of the limiting block, and all five first bevel gears mesh with the second bevel gears.

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