Lithium hexafluorophosphate crushing device
By designing a crushing device for lithium hexafluorophosphate, the combination of crushing rollers, screens and stirring mechanisms is used to solve the problem of efficient crushing and homogenization of large-scale crystallization of lithium hexafluorophosphate, and the efficient and homogenous crushing process is achieved.
Patent Information
- Application Number
- CN202421324090.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In the production process of lithium hexafluorophosphate crystals, large pieces of lithium hexafluorophosphate crystals need to be crushed into particles, but the prior art is difficult to achieve an efficient and homogeneous crushing process.
A lithium hexafluorophosphate crushing device is designed, including a shell, a crushing roller, a screen, a stirring mechanism, etc. The crushing and screening of lithium hexafluorophosphate is achieved through the rotation of the crushing roller, the vibration of the screen and the function of the stirring mechanism.
It realizes efficient crushing and homogenization of lithium hexafluorophosphate, and improves the quality and production efficiency of the crushed products.
Smart Images
Figure CN222956290U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lithium hexafluorophosphate production equipment, and particularly relates to a lithium hexafluorophosphate crushing device. Background Technique
[0002] As the most widely commercially used electrolyte for lithium-ion batteries, lithium hexafluorophosphate has good ionic conductivity and electrochemical stability, and has become the core raw material for producing lithium-ion battery electrolytes, accounting for about 43% of the total cost of electrolytes. With the rapid development of the new energy industry, its market demand has increased sharply, and the development prospect is good.
[0003] At present, the main domestic and foreign preparation processes of lithium hexafluorophosphate include hydrofluoric acid solvent method, gas-solid reaction method, organic solvent method, ion exchange method, etc. Among them, the hydrofluoric acid solvent method is the most important industrial production method at present. The process is to dissolve lithium fluoride in anhydrous hydrofluoric acid to prepare a lithium fluoride solution, and then introduce phosphorus pentafluoride gas into the solution for gas-liquid reaction to produce lithium hexafluorophosphate, which has the advantages of fast reaction speed, easy reaction control, high product conversion rate, relatively few side reactions, and high product purity.
[0004] During the production process of lithium hexafluorophosphate crystals, after the lithium hexafluorophosphate crystals are produced, it is necessary to break them into lithium hexafluorophosphate particles through a crushing device. It is necessary to provide a lithium hexafluorophosphate crushing device. Content of the Utility Model
[0005] In order to achieve the above object, the utility model provides a lithium hexafluorophosphate crushing device.
[0006] The technical solution of a lithium hexafluorophosphate crushing device of the utility model is as follows:
[0007] A lithium hexafluorophosphate crushing device includes a housing. An inlet pipe is provided at the upper end of the housing, and an inlet valve is provided on the inlet pipe. An outlet pipe is provided at the lower end of the housing, and an outlet valve is provided on the outlet pipe. Two crushing rollers are provided in the housing below the outlet of the inlet pipe. A screen is provided in the housing below the crushing rollers and is arranged obliquely. The screen is installed on the inner wall of the housing through a vertical vibration mechanism. A crushing box is provided on the outer wall of the housing near the lower end side of the screen. An inlet and an outlet communicating with the crushing box are provided on the housing on the upper and lower sides of the screen. A rotating shaft with a horizontal extending rotation axis is provided in the crushing box. A plurality of groups of crushing blades are provided on the outer wall of the rotating shaft. The end of the rotating shaft extends into the interior of the housing and is fixedly connected with a cam for driving the screen to move up and down. A stirring mechanism is provided in the housing below the screen.
[0008] Furthermore, two split sealing plates are hinged at the outlet of the feed pipe, and a return spring for keeping the sealing plates horizontally sealed is arranged between the sealing plates and the inner wall of the feed pipe.
[0009] Furthermore, the vertical vibration mechanism includes a guide rod, a guide plate and a buffer spring. The guide rod is fixedly connected to the lower side of the sieve mesh, the guide plate is fixedly connected to the inner wall of the housing, the guide plate is provided with a guide hole matching the guide rod, the buffer spring is sleeved on the guide rod, and the upper and lower ends of the buffer spring are respectively abutted against the sieve mesh and the guide plate.
[0010] Furthermore, a connecting plate is fixedly connected to the lower side of the lower end of the sieve mesh. The upper end of the vertical section of the connecting plate is fixedly connected to the lower side surface of the sieve mesh, and the lower side surface of the horizontal section of the connecting plate abuts against the cam. A first driving motor for driving the rotating shaft to rotate is fixedly connected to the outer wall of the crushing box far away from the housing.
[0011] Furthermore, a transmission cavity separated by a partition plate is arranged at the bottom of the housing. The stirring mechanism includes a second driving motor, a transmission mechanism, a delivery pipe, a screw conveyor and two stirring shafts. The delivery pipe is fixedly connected to the center position of the upper side surface of the partition plate. A discharge pipe arranged obliquely downward is arranged at the upper end of the delivery pipe. A feed inlet is arranged on the outer wall of the lower end of the delivery pipe. The screw conveyor is located in the delivery pipe. The rotating shaft of the screw conveyor is rotatably installed on the partition plate. The two stirring shafts are rotatably installed on the partition plate. The two stirring shafts are symmetrically arranged with respect to the delivery pipe. The central axis of the stirring shaft penetrates downward into the transmission cavity, and the central axis of the screw conveyor penetrates downward into the transmission cavity. The second driving motor is fixedly connected to the bottom of the housing, and the output shaft of the second driving motor is fixedly connected to the central axis of the screw conveyor. The transmission mechanism includes a driving gear and two driven gears. The driving gear is fixedly connected to the central axis of the screw conveyor, and the two driven gears are respectively fixedly connected to the lower ends of the central axes of the stirring shafts.
[0012] Furthermore, there are two discharge pipes, and the two discharge pipes are symmetrically arranged on both sides of the housing.
[0013] The utility model provides a lithium hexafluorophosphate crushing device, and its beneficial effects are as follows:
[0014] When the lithium hexafluorophosphate crushing device of the present utility model is in use, large crystal lithium hexafluorophosphate to be crushed enters the shell through the feed pipe and the feed valve. After the feeding is completed, the two sealing plates seal the pipe orifice of the feed pipe under the action of the return spring. The two crushing rollers rotate to crush the large crystal lithium hexafluorophosphate that falls between the two crushing rollers. The first driving motor starts to drive the rotating shaft and the crushing knife to rotate, and at the same time drives the cam to rotate. The screen vibrates up and down under the combined action of the cam and the vertical vibration mechanism to screen the crystal lithium hexafluorophosphate that falls onto the screen. The larger crystal lithium hexafluorophosphate slides down along the screen into the crushing box and is crushed again by the crushing knife. The crushed crystal lithium hexafluorophosphate slides into the shell. The crystal lithium hexafluorophosphate passing through the screen falls to the bottom of the shell. The second driving motor starts, and the second driving motor drives the auger and the two stirring shafts to rotate. The auger conveys the crystal lithium hexafluorophosphate at the bottom upward and discharges it from the discharge port at the upper end. The two stirring shafts stir the crystal lithium hexafluorophosphate to improve the homogeneity of the crushed lithium hexafluorophosphate, and the mixed crystal lithium hexafluorophosphate is discharged from the discharge pipe. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the lithium hexafluorophosphate crushing device of the present utility model;
[0016] Figure 2 is Figure 1 an enlarged view of part A in
[0017] Figure 3 is Figure 1 an enlarged view of part B in
[0018] In the figure: 1, shell; 2, partition board; 3, feed pipe; 4, feed valve; 5, discharge pipe; 6, discharge valve; 7, sealing plate; 8, return spring; 9, crushing roller; 10, screen; 11, guide rod; 12, guide plate; 13, buffer spring; 14, connecting plate; 15, crushing box; 16, feed port; 17, discharge port; 18, rotating shaft; 19, crushing blade; 20, first driving motor; 21, cam; 22, conveying pipe; 23, discharge pipe; 24, stirring shaft; 25, second driving motor; 26, driving gear; 27, driven gear. Detailed Embodiments
[0019] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:
[0020] A specific embodiment of the lithium hexafluorophosphate crushing device of the present utility model, such as Figure 1 , Figure 2 , Figure 3As shown in the figure, it includes a housing 1. An inlet pipe 3 is provided at the upper end of the housing 1, and an inlet valve 4 is provided on the inlet pipe 3. An outlet pipe 5 is provided at the lower end of the housing 1, and an outlet valve 6 is provided on the outlet pipe 5. Inside the housing 1, there are two crushing rollers 9 located below the outlet of the inlet pipe 3. Inside the housing 1, there is a screen 10 which is arranged obliquely and located below the crushing rollers 9. The screen 10 is installed on the inner wall of the housing 1 through a vertical vibration mechanism. On the outer wall of the housing 1 near the lower end side of the screen 10, there is a crushing box 15. On the housing 1, there are an inlet 16 and an outlet 17 which are located on the upper and lower sides of the screen 10 and communicate with the crushing box 15. Inside the crushing box 15, there is a rotating shaft 18 whose axis extends horizontally. On the outer wall of the rotating shaft 18, there are several groups of crushing blades 19. The end of the rotating shaft 18 extends into the interior of the housing 1 and is fixedly connected with a cam 21 for driving the screen 10 to move up and down. Inside the housing 1, there is a stirring mechanism located below the screen 10.
[0021] At the outlet of the inlet pipe 3, there are two split sealing plates 7 hinged. Between the sealing plates 7 and the inner wall of the inlet pipe 3, there is a return spring 8 for keeping the sealing plates 7 horizontally sealed. The vertical vibration mechanism includes a guide rod 11, a guide plate 12 and a buffer spring 13. The guide rod 11 is fixedly connected to the lower side of the screen 10. The guide plate 12 is fixedly connected to the inner wall of the housing 1. The guide plate 12 has a guide hole matching the guide rod 11. The buffer spring 13 is sleeved on the guide rod 11, and the upper and lower ends of the buffer spring 13 are respectively abutted against the screen 10 and the guide plate 12. A connecting plate 14 is fixedly connected to the lower side of the lower end of the screen 10. The upper end of the vertical section of the connecting plate 14 is fixedly connected to the lower surface of the screen 10. The lower surface of the horizontal section of the connecting plate 14 is abutted against the cam 21. On the outer wall of the end of the crushing box 15 far from the housing 1, there is a first driving motor 20 for driving the rotating shaft 18 to rotate.
[0022] At the bottom of the housing 1, there is a transmission cavity separated by a partition 2. The stirring mechanism includes a second driving motor 25, a transmission mechanism, a conveying pipe 22, an auger and two stirring shafts 24. The conveying pipe 22 is fixedly connected to the center position of the upper surface of the partition 2. At the upper end of the conveying pipe 22, there is a discharge pipe 23 arranged obliquely downward. On the outer wall of the lower end of the conveying pipe 22, there is an inlet 16. The auger is located inside the conveying pipe 22. The rotating shaft 18 of the auger is rotatably installed on the partition 2. The two stirring shafts 24 are rotatably installed on the partition 2. The two stirring shafts 24 are symmetrically arranged with respect to the conveying pipe 22. The central axis of the stirring shaft 24 penetrates downward into the transmission cavity. The central axis of the auger penetrates downward into the transmission cavity. The second driving motor 25 is fixedly connected to the bottom of the housing 1. The output shaft of the second driving motor 25 is fixedly connected to the central axis of the auger. The transmission mechanism includes a driving gear 26 and two driven gears 27. The driving gear 26 is fixedly connected to the central axis of the auger. The two driven gears 27 are respectively fixedly connected to the lower ends of the central axes of the stirring shafts 24. There are two outlet pipes 5, and the two outlet pipes 5 are symmetrically arranged on both sides of the housing 1.
[0023] When the lithium hexafluorophosphate crushing device of the present utility model is in use, large crystal lithium hexafluorophosphate to be crushed enters the shell 1 through the feed pipe 3 and the feed valve 4. After the feeding is completed, the two sealing plates 7 seal the orifice of the feed pipe 3 under the action of the return spring 8. The two crushing rollers 9 rotate to crush the large crystal lithium hexafluorophosphate falling between the two crushing rollers 9. The first driving motor 20 is started to drive the rotating shaft 18 and the crushing knife to rotate, and at the same time drive the cam 21 to rotate. The screen 10 vibrates up and down under the combined action of the cam 21 and the vertical vibration mechanism to screen the crystal lithium hexafluorophosphate falling on the screen 10. The larger crystal lithium hexafluorophosphate slides down along the screen 10 into the crushing box and is crushed again by the crushing knife. The crushed crystal lithium hexafluorophosphate slides into the shell 1. The crystal lithium hexafluorophosphate passing through the screen 10 falls to the bottom of the shell 1. The second driving motor 25 is started, and the second driving motor 25 drives the auger and the two stirring shafts 24 to rotate. The auger conveys the crystal lithium hexafluorophosphate at the bottom upward and discharges it from the discharge port at the upper end. The two stirring shafts 24 stir the crystal lithium hexafluorophosphate, improving the homogeneity of the crushed lithium hexafluorophosphate. The mixed crystal lithium hexafluorophosphate is discharged from the discharge pipe 5.
[0024] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A lithium hexafluorophosphate crushing device, characterized in that: It comprises a shell, the upper end of which is provided with a feed pipe, the feed pipe is provided with a feed valve, the lower end of which is provided with a discharge pipe, the discharge pipe is provided with a discharge valve, two crushing rollers located at the lower side of the feed pipe outlet are arranged in the shell, a screen arranged obliquely and located at the lower side of the crushing roller is arranged in the shell, the screen is mounted on the inner wall of the shell through a vertical vibration mechanism, a crushing box is arranged on the outer wall of the shell near the lower end of the screen, the shell is provided with a feed port and a discharge port located on the upper and lower sides of the screen and connected to the crushing box, a rotating shaft with a rotating axis extending in a horizontal direction is arranged in the crushing box, a plurality of groups of crushing blades are arranged on the outer wall of the rotating shaft, an end of the rotating shaft extends into the shell and is fixedly connected to a cam for driving the screen to move up and down, and a stirring mechanism located at the lower side of the screen is arranged in the shell.
2. The lithium hexafluorophosphate crushing device according to claim 1, characterized in that: Two opposing sealing plates are hinged at the outlet of the feed pipe, and a return spring is arranged between the sealing plate and the inner wall of the feed pipe to keep the sealing plate in horizontal sealing.
3. The lithium hexafluorophosphate crushing device according to claim 1, characterized in that: The vertical vibration mechanism includes a guide rod, a guide plate and a buffer spring. The guide rod is fixedly connected to the lower side of the screen, the guide plate is fixedly connected to the inner wall of the shell, and the guide plate has a guide hole matching the guide rod. The buffer spring is sleeved on the guide rod, and the upper and lower ends of the buffer spring are respectively in contact with the screen and the guide plate.
4. The lithium hexafluorophosphate crushing device according to claim 3, characterized in that: A connecting plate is fixedly connected to the lower side of the lower end of the screen, the upper end of the vertical section of the connecting plate is fixedly connected to the lower side of the screen, the lower side of the horizontal section of the connecting plate abuts against the cam, and a first driving motor that drives the rotating shaft to rotate is fixedly connected to the outer wall of the end of the crushing box away from the shell.
5. The lithium hexafluorophosphate crushing device according to claim 1, characterized in that: The bottom of the shell is provided with a transmission chamber separated by a partition, the stirring mechanism comprises a second driving motor, a transmission mechanism, a conveying pipe, an auger and two stirring shafts, the conveying pipe is fixedly connected to the center position of the side of the partition, the upper end of the conveying pipe is provided with a discharge pipe arranged inclined downward, and the outer wall of the lower end of the conveying pipe is provided with a feed port, the auger is located in the conveying pipe, the rotating shaft of the auger is rotatably mounted on the partition, the two stirring shafts are rotatably mounted on the partition, the two stirring shafts are symmetrically arranged about the conveying pipe, the center axis of the stirring shaft penetrates downward into the transmission chamber, the center axis of the auger penetrates downward into the transmission chamber, the second driving motor is fixedly connected to the bottom of the shell, the output shaft of the second driving motor is fixedly connected to the center axis of the auger, the transmission mechanism comprises a driving gear and two driven gears, the driving gear is fixedly connected to the center axis of the auger, and the two driven gears are respectively fixedly connected to the lower ends of the center axis of the stirring shaft.
6. The lithium hexafluorophosphate crushing device according to claim 1, characterized in that: There are two discharge pipes, which are symmetrically arranged on both sides of the shell.