Filter press for solid-liquid separation of lithium carbonate

Abstract

The utility model relates to the technical field of lithium carbonate production, in particular to a filter press for solid-liquid separation of lithium carbonate. The filter press for solid-liquid separation of lithium carbonate comprises a bottom plate, a filter box, a sealing assembly, a first air cylinder, guide rods, a filter plate and reset springs, the filter box is fixedly connected to the right side of the upper portion of the bottom plate, the sealing assembly is arranged on the right side of the filter box, the first air cylinder is installed on the top of the filter box, and the guide rods are fixedly connected to the top in the filter box. A filter plate is connected between the exteriors of the plurality of guide rods in a sliding manner, and a reset spring for assisting resetting sleeves the exteriors of the plurality of guide rods. By arranging the discharging mechanism, the lithium carbonate saturated solution is automatically and rapidly added into the filter plate, manual intervention is reduced, charging can be conveniently and rapidly stopped, and the problem that the existing process of adding the lithium carbonate saturated solution is tedious and time-consuming is effectively solved; the risk of excessive addition exists; and the operation complexity and the time cost are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium carbonate production, in particular to a filter press for solid-liquid separation of lithium carbonate. Background Art

[0002] Lithium carbonate is an inorganic compound, which is a colorless monoclinic crystal or white powder, soluble in dilute acid, slightly soluble in water, more soluble in cold water than in hot water, and insoluble in alcohol and acetone. It is a commonly used raw material for lithium-ion batteries. It is stable in air and does not deliquesce. It is thermally stable below 600 °C, but begins to decompose into lithium oxide and carbon dioxide when heated to 618 °C. It can be used to make ceramics, drugs, catalysts, etc. In the production process of lithium carbonate, pressure filtration is a key solid-liquid separation step. The filter press is mainly used to separate solid lithium carbonate particles from the saturated lithium carbonate solution, and at the same time remove as much water adhering to the particle surface as possible.

[0003] The patent with the patent authorization announcement number CN221155548U discloses a pressure filtration structure for improving lithium carbonate products, including a machine shell. A cylinder is fixedly installed on the upper surface of the machine shell. The output end of the cylinder is fixedly installed with an installation box. A filter plate is arranged below the installation box. Two slide rails are installed on the inner side wall of the machine shell. A filter screen is slidably connected between the two slide rails. When using this pressure filtration structure for improving lithium carbonate products, the saturated lithium carbonate solution enters the machine shell through two feed pipes. By setting the two feed pipes, the feeding time is greatly shortened. At the same time, the conveying pressure of the material is monitored by a pressure sensor to understand the filling situation inside the filter press in real time and avoid blockage. When in use, the cylinder drives the filter plate to move downward to press-filter the material on the filter screen, thus completing solid-liquid separation. Although the above patent can work, several deficiencies are still exposed in practical applications. For example, when adding the saturated lithium carbonate solution from the feed pipe into the machine shell, it is necessary to pre-connect the conveying pipe of the saturated lithium carbonate solution to the feed pipe, which is a cumbersome and time-consuming process. Secondly, when adding the saturated lithium carbonate solution into the machine shell, there is a lack of a mechanism to immediately cut off the connection between the conveying pipe and the feed pipe, resulting in the inability to quickly stop feeding, and there is a risk of over-adding, which may affect the subsequent pressure filtration efficiency. In addition, the conveying pipe and the feed pipe need to be reconnected and disconnected for each round of feeding, increasing the complexity and time cost of the operation.

[0004] Therefore, there is a particular need for a filter press for solid-liquid separation of lithium carbonate to solve the problems existing in the prior art. Summary of the Utility Model

[0005] In order to overcome the shortcomings that the process of adding the saturated lithium carbonate solution in the existing patent is cumbersome and time-consuming; there is a risk of over-adding; and it increases the complexity and time cost of the operation, the utility model provides a filter press for solid-liquid separation of lithium carbonate.

[0006] This utility model is achieved through the following technical means: a filter press for solid-liquid separation of lithium carbonate, including a bottom plate, a filtration tank, a sealing assembly, a first cylinder, a guide rod, a filter plate, a return spring, a pressing plate, a discharge pipe, a limiting rod, and a dust-proof cover. The upper right side of the bottom plate is fixedly connected with a filtration tank. A sealing assembly is arranged on the right side of the filtration tank. A first cylinder is installed on the top of the filtration tank. Multiple guide rods are fixedly connected to the inner top of the filtration tank. A filter plate is slidably connected between the multiple guide rods and is sleeved with a return spring for assisting in resetting. The two ends of the return spring are respectively connected to the filtration tank and the filter plate. The telescopic rod of the first cylinder penetrates into the interior of the filtration tank, and the lower end is fixedly connected with a pressing plate. The pressing plate is located directly above the filter plate and can be mutually engaged with the filter plate. The lower left side of the filtration tank is fixedly connected with a discharge pipe. The lower left side of the filtration tank is fixedly connected with a limiting rod. A dust-proof cover is slidably connected to the outside of the limiting rod. The dust-proof cover closely adheres to the left end of the discharge pipe to close it. It further includes a feeding mechanism, and a feeding mechanism is arranged between the filtration tank and the support frame.

[0007] Optionally, the feeding mechanism includes a second electric slide rail, a second electric slider, a storage frame, a discharge port, a cover plate, a baffle, a hopper, a support frame, and a second cylinder. Second electric slide rails are installed on the front and rear sides of the upper part of the filtration tank. A second electric slider is slidably connected inside the second electric slide rail. A storage frame is installed between the two second electric sliders. The bottom of the storage frame is fixedly connected with a discharge port. A cover plate for sealing is rotatably connected to the upper part of the storage frame. A baffle is installed between the left ends of the two second electric slide rails. The baffle is located below the discharge port and contacts it. A hopper is rotatably connected to the upper left side of the filtration tank. The upper left side of the bottom plate is fixedly connected with a support frame. A second cylinder is installed on the right side of the middle of the support frame. The upper end of the telescopic rod of the second cylinder is connected to the bottom of the hopper.

[0008] Optionally, the sealing assembly includes a first electric slide rail, a first electric slider, and a sliding plate. First electric slide rails are symmetrically installed on the front and rear sides of the right side of the filtration tank. A first electric slider is slidably connected inside the first electric slide rail. A sliding plate is installed between the two first electric sliders. The sliding plate is located on the right side of the filtration tank to close it.

[0009] Optionally, it further includes a first filter screen, and the first filter screen is placed in the discharge pipe in an embedded manner.

[0010] Optionally, it further includes a limiting ring, and the limiting ring is fixedly connected inside the discharge pipe.

[0011] Optionally, it further includes an activated carbon plate, and the activated carbon plate is placed in the discharge pipe in an embedded manner.

[0012] Optionally, it further includes a second filter screen, and the second filter screen is slidably placed in the lower part of the filtration tank. The second filter screen is located below the filter plate.

[0013] From the above description of the structure of the present utility model, the design starting point, concept and advantages of the present utility model are as follows: 1. By setting the blanking mechanism, the saturated lithium carbonate solution can be automatically and quickly added into the filter plate, reducing manual intervention and facilitating the rapid stop of feeding, effectively solving the problems of cumbersome and time-consuming process when adding the saturated lithium carbonate solution in the prior art; there is a risk of over-addition; increasing the complexity and time cost of operation.

[0014] 2. By setting the first electric slide rail, the first electric slider and the sliding plate, when the first electric slide rail is turned on, the first electric slider can be controlled to drive the sliding plate to move upward to open the filter box, or the first electric slider can be controlled to drive the sliding plate to move downward to close the filter box, realizing the automatic opening and closing of the filter box.

[0015] 3. By setting the first filter screen, the filter plate and the second filter screen, the pressed liquid is filtered multiple times, effectively improving the purity of the liquid. Description of the Drawings

[0016] Figure 1 is a three-dimensional structure schematic diagram of the present utility model.

[0017] Figure 2 is the first partial cross-sectional view of the present utility model.

[0018] Figure 3 is the second partial cross-sectional view of the present utility model.

[0019] Figure 4 is the third partial cross-sectional view of the present utility model.

[0020] The meanings of the reference numerals in the drawings: 1. Bottom plate, 101. Support frame, 2. Filter box, 3. First electric slide rail, 4. First electric slider, 5. Sliding plate, 6. First cylinder, 7. Second electric slide rail, 8. Second electric slider, 9. Storage frame, 901. Discharge port, 10. Cover plate, 11. Baffle, 12. Hopper, 13. Second cylinder, 14. Guide rod, 15. Filter plate, 16. Return spring, 17. Discharge pipe, 18. Pressing plate, 19. Dust-proof cover, 20. Limiting ring, 2001. Limiting rod, 21. First filter screen, 22. Activated carbon plate, 23. Second filter screen. Detailed Embodiments

[0021] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings. It should be noted that the terms such as up, down, left, right, front, back, inside and outside that appear or will appear in the text of the present utility model are only based on the drawings of the present utility model, and they do not specifically limit the present utility model.

[0022] Embodiment: A filter press for solid-liquid separation of lithium carbonate, refer toFigures 1 - 4 As shown in the figure, it includes a bottom plate 1, a filter box 2, a sealing assembly, a first cylinder 6, a guide rod 14, a filter plate 15, a return spring 16, a pressing plate 18, a discharge pipe 17, a limiting rod 2001, a dust cover 19, a first filter screen 21, a limiting ring 20, an activated carbon plate 22 and a second filter screen 23. On the upper right side of the bottom plate 1, the filter box 2 is connected by welding. On the right side of the filter box 2, a sealing assembly is provided. On the top of the filter box 2, the first cylinder 6 is connected by bolts. Inside the top of the filter box 2, a plurality of guide rods 14 distributed in a rectangular path are connected by welding. A filter plate 15 is slidably connected between the outer parts of the plurality of guide rods 14, and a return spring 16 for assisting in resetting is sleeved. The two ends of the return spring 16 are respectively connected to the filter box 2 and the filter plate 15. The telescopic rod of the first cylinder 6 penetrates into the interior of the filter box 2, and the lower end is connected to the pressing plate 18 by welding. The pressing plate 18 is located directly above the filter plate 15 and can be mutually engaged with the filter plate 15. On the lower left side of the filter box 2, the discharge pipe 17 is connected by welding. On the lower left side of the filter box 2, the limiting rod 2001 is connected by welding. A dust cover 19 is slidably connected to the outside of the limiting rod 2001. The dust cover 19 closely adheres to the left end of the discharge pipe 17 to close it, and there is a certain frictional force between the dust cover 19 and the limiting rod 2001. A convex block for assisting in pulling is provided on the left side of the dust cover 19. The first filter screen 21 is placed inside the discharge pipe 17 in an embedded manner. Inside the discharge pipe 17, the limiting ring 20 is connected by welding. The limiting ring 20 is located to the left of the first filter screen 21, so that the first filter screen 21 can be limited inside the discharge pipe 17. The activated carbon plate 22 is placed inside the discharge pipe 17 in an embedded manner. The activated carbon plate 22 is located between the limiting ring 20 and the first filter screen 21. The second filter screen 23 is slidably placed in the lower part of the filter box 2. The second filter screen 23 is located below the filter plate 15, so that the liquid passing through the filter plate 15 flows into the second filter screen 23 for screening. By controlling the telescopic rod of the first cylinder 6 to extend or retract, the pressing plate 18 is driven to move downward or upward. It also includes a feeding mechanism. A feeding mechanism is provided between the filter box 2 and the support frame 101.

[0023] Refer to Figure 1As shown in the figure, the blanking mechanism includes a second electric slide rail 7, a second electric slider 8, a material storage box 9, a discharge port 901, a cover plate 10, a baffle 11, a hopper 12, a support frame 101 and a second cylinder 13. Both the front and rear sides of the upper part of the filter box 2 are connected by bolts to the second electric slide rail 7. The second electric slider 8 is slidably connected inside the second electric slide rail 7. The material storage box 9 is connected by bolts between the two second electric sliders 8. The bottom of the material storage box 9 is connected by welding to the discharge port 901. The upper part of the material storage box 9 is rotatably connected to a cover plate 10 for sealing. A U-shaped handle for assisting rotation is provided on the right side of the cover plate 10. A baffle 11 is connected by bolts between the left ends of the two second electric slide rails 7. The baffle 11 is located below the discharge port 901 and is in contact with it. The hopper 12 is rotatably connected to the upper left side of the filter box 2. The upper left side of the bottom plate 1 is connected by welding to the support frame 101. The left end of the second electric slide rail 7 is fixedly connected to the support frame 101 to improve the stability of the second electric slide rail 7. The upper right side of the middle of the support frame 101 is connected by bolts to the second cylinder 13. The upper end of the telescopic rod of the second cylinder 13 is connected to the bottom of the hopper 12.

[0024] Refer to Figure 1 As shown in the figure, the sealing assembly includes a first electric slide rail 3, a first electric slider 4 and a sliding plate 5. The right side of the filter box 2 is connected by bolts to the front and rear symmetric first electric slide rails 3. The first electric slider 4 is slidably connected inside the first electric slide rail 3. The sliding plate 5 is connected by bolts between the two first electric sliders 4. The sliding plate 5 is located on the right side of the filter box 2 to close it.

[0025] First, the staff rotates the cover plate 10 upwards by 180 degrees to open the storage frame 9, and then pours the saturated lithium carbonate solution into the storage frame 9. After pouring, the staff rotates the cover plate 10 downwards by 180 degrees to close the storage frame 9, and then turns on the second electric slide rail 7 to control the second electric slide block 8 to drive the storage frame 9 to move rightward to a suitable position so that the discharge port 901 avoids the baffle 11 and is opened. After the discharge port 901 is opened, the saturated lithium carbonate solution in the storage frame 9 flows out to the hopper 12. When the hopper 12 receives an appropriate amount of saturated lithium carbonate solution, the second electric slide block 8 is immediately controlled to drive the storage frame 9 to move leftward to repeat. The discharging port 901 is aligned with the baffle plate 11 and is closed to stop discharging. Then the staff starts the second cylinder 13 and controls its telescopic rod to extend to a suitable length, thereby driving the hopper 12 to rotate upward by 45 degrees to pour all the saturated lithium carbonate solution into the filter box 2. The saturated lithium carbonate solution directly flows into the filter plate 15. Then the telescopic rod of the second cylinder 13 is controlled to retract, driving the hopper 12 to rotate downward by 45 degrees to reset. Then the first cylinder 6 is started and its telescopic rod is controlled to extend, thereby driving the pressing plate 18 to move downward and embed into the filter plate 15 to realize the pressure filtration of the saturated lithium carbonate solution. During the filtration process, the pressing plate 18 squeezes the filter plate 15 to move downward to the limit position, and the return spring 16 is compressed accordingly. The liquid separated during the filtration passes through the filter plate 15 and flows down, and is filtered by the second screen and collected at the bottom of the filter box 2. After the filtration is completed, the telescopic rod of the first cylinder 6 is controlled to retract, thereby driving the pressing plate 18 to move upward and separate from the filter plate 15. At this time, the return spring 16 returns to its original state, prompting the filter plate 15 to move upward and reset. During the resetting process of the filter plate 15, the liquid remaining at the bottom is completely removed due to the shaking of the filter plate 15. The staff repeats the above steps to continue filtering the storage frame 9, after all the saturated lithium carbonate solutions are filtered, pull up the dust cover 19 to open the discharge pipe 17, so that the liquid is discharged from the discharge pipe 17. During the discharge, the first filter screen 21 and the activated carbon plate 22 perform double filtration on the liquid to improve the purity of the liquid. After the liquid is discharged, push the dust cover 19 downward to close the discharge pipe 17, and finally open the first electric slide rail 3, control the first electric slider 4 to drive the sliding plate 5 to move upward to open the filter box 2 and clean the filter plate 15. After cleaning, control the first electric slider 4 to drive the sliding plate 5 to move downward to close the filter box 2.

[0026] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications and equivalent structures and functions.

Claims

1. A filter press for solid-liquid separation of lithium carbonate, comprising a bottom plate (1), a filter box (2), a sealing assembly, a first cylinder (6), a guide rod (14), a filter plate (15), a reset spring (16), a pressure plate (18), a discharge pipe (17), a limit rod (2001) and a dust cover (19), wherein the filter box (2) is fixedly connected to the right side of the upper part of the bottom plate (1), the sealing assembly is arranged on the right side of the filter box (2), the first cylinder (6) is installed on the top of the filter box (2), a plurality of guide rods (14) are fixedly connected to the top of the filter box (2), the filter plates (15) are slidably connected between the outsides of the plurality of guide rods (14), and a sleeve is provided with a filter for assisting the reset. The two ends of the return spring (16) are respectively connected to the filter box (2) and the filter plate (15). The telescopic rod of the first cylinder (6) penetrates into the filter box (2) and is fixedly connected to a pressure plate (18) at the lower end. The pressure plate (18) is located directly above the filter plate (15) and can be mutually engaged with the filter plate (15). The left side of the lower part of the filter box (2) is fixedly connected to a discharge pipe (17). The left side of the lower part of the filter box (2) is fixedly connected to a limit rod (2001). The outer part of the limit rod (2001) is slidably connected to a dust cover (19). The dust cover (19) is tightly attached to the left end of the discharge pipe (17) to close it. The invention is characterized in that It also includes a material discharge mechanism, which is arranged between the filter box (2) and the support frame (101).

2. The filter press for solid-liquid separation of lithium carbonate according to claim 1, characterized in that: The unloading mechanism comprises a second electric slide rail (7), a second electric slider (8), a material storage frame (9), a material outlet (901), a cover plate (10), a baffle (11), a hopper (12), a support frame (101) and a second cylinder (13); the second electric slide rail (7) is installed on both the front and rear sides of the upper part of the filter box (2); the second electric slider (8) is slidably connected inside the second electric slide rail (7); a material storage frame (9) is installed between the two second electric sliders (8); the material outlet is fixedly connected to the bottom of the material storage frame (9). (901), a cover plate (10) for sealing is rotatably connected to the upper part of the material storage frame (9), a baffle (11) is installed between the left ends of the two second electric slide rails (7), and the baffle (11) is located below the discharge port (901) and contacts therewith, a hopper (12) is rotatably connected to the left side of the upper part of the filter box (2), a support frame (101) is fixedly connected to the left side of the upper part of the bottom plate (1), a second cylinder (13) is installed on the right side of the middle part of the support frame (101), and the upper end of the telescopic rod of the second cylinder (13) is connected to the bottom of the hopper (12).

3. The filter press for solid-liquid separation of lithium carbonate according to claim 2, characterized in that: The sealing component comprises a first electric slide rail (3), a first electric slider (4) and a sliding plate (5); a first electric slide rail (3) symmetrically arranged front and rear is installed on the right side of the filter box (2); a first electric slider (4) is slidably connected inside the first electric slide rail (3); a sliding plate (5) is installed between the two first electric sliders (4); and the sliding plate (5) is located on the right side of the filter box (2) to close it.

4. The filter press for solid-liquid separation of lithium carbonate according to claim 3, characterized in that: It also includes a first filter screen (21), and the first filter screen (21) is embedded and placed inside the discharge pipe (17).

5. The filter press for solid-liquid separation of lithium carbonate according to claim 4, characterized in that: It also includes a limiting ring (20), and the inside of the discharge pipe (17) is fixedly connected to the limiting ring (20).

6. The filter press for solid-liquid separation of lithium carbonate according to claim 5, characterized in that: It also includes an activated carbon plate (22), and the activated carbon plate (22) is embedded in the discharge pipe (17).

7. The filter press for solid-liquid separation of lithium carbonate according to claim 6, characterized in that: It also includes a second filter screen (23), which is slidably placed in the lower part of the filter box (2), and the second filter screen (23) is located below the filter plate (15).

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