A lithium carbonate hydrocarbon purification device

Abstract

The application discloses a lithium carbonate hydrocarbon hydrogenation purification device, which comprises an outer cylinder and a flow guide cylinder. A first rotating motor is arranged on the top wall of the outer cylinder and supported by a support frame. The output end of the first rotating motor is fixedly connected with a rotating shaft through a shaft coupling. The bottom end of the rotating shaft extends downward to the bottom end of the flow guide cylinder. A plurality of upper rotating blades are arranged on the rotating shaft at intervals. The upper rotating blades are arranged in the flow guide cylinder, and the edges of the upper rotating blades are close to the inner wall of the flow guide cylinder. Correspondingly, a gas inlet pipe for supplying carbon dioxide gas is arranged at the bottom end in the flow guide cylinder. After the rotating shaft is driven to rotate by the first rotating motor, the rotating shaft drives the upper rotating blades to rotate. The upper rotating blades upwardly convey the slurry in the flow guide cylinder. Meanwhile, the rising carbon dioxide bubbles are broken up by the upper rotating blades to form small bubbles. Since the slurry is limited in the flow guide cylinder, the slurry can fully contact with the carbon dioxide gas, so that the reaction is fully carried out, and the reaction efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of battery-grade lithium carbonate purification technology, specifically to a lithium carbonate hydrocarbon purification apparatus. Background Technology

[0002] Most lithium carbonate produced from lithium extraction from salt lakes and lithium battery recycling is industrial-grade lithium carbonate, which needs to be purified to meet the quality requirements of battery-grade lithium carbonate before it can be used as a battery material.

[0003] The production of battery-grade lithium carbonate from industrial-grade lithium carbonate mainly employs carbonization and thermal precipitation processes. The process is as follows:

[0004] 1. Industrial-grade lithium carbonate (solid) is mixed with water to form a slurry of a certain concentration (solid-liquid mass ratio is generally 1:20~30), which reacts with CO2 (gas) to produce lithium bicarbonate solution. Soluble impurities (mainly Na) + K + SO4 2- Cl - The impurities (e.g.) dissolve in the solution; the insoluble impurities remain suspended in the solution. The reaction process is as follows: Li₂CO₃(s) + H₂O(l) + CO₂(g) = 2LiHCO₃(aq).

[0005] 2. Purification: The lithium bicarbonate solution is filtered to obtain a clear solution, removing insoluble impurities.

[0006] 3. Thermal decomposition reaction: Clarified lithium bicarbonate decomposes upon heating to yield solid lithium carbonate, along with other soluble impurities (mainly Na). + K + SO4 2- Cl - The solid (etc.) remains in the solution. After separation, the solid is battery-grade lithium carbonate. The reaction process is as follows: 2LiHCO3(aq) = Li2CO3(s) + H2O(l) + CO2(g).

[0007] Among the equipment used in hydrocarbon reaction processes, the most commonly used types in industry are bubble column reactors and stirred tank reactors. In bubble column reactors, the gas rises from the bottom of the column via a distributor, forming small bubbles that react with the solids in the solution. As the gas rises, it forms larger bubbles, and the probability of contact with the solids gradually decreases. Therefore, this type of equipment has relatively low reaction efficiency.

[0008] In a stirred tank reactor, gas enters from the bottom and, as it rises, is broken up by the agitator into small bubbles, which then react with the solids in the solution. Alternatively, the gas enters from the bottom, is dispersed by the agitator in the lower layer, and then diffuses to the periphery. As it rises, it aggregates into larger bubbles, with the central part colliding with the impeller blades and being broken up again to react with the solids in the solution. Compared to a bubble column, the multiple forced dispersions by the mechanical device result in relatively higher reaction efficiency. However, during the ascent, the distance between the agitator blades and the reactor wall prevents the bubbles around the periphery from contacting the blades and being broken up, thus preventing the slurry in the surrounding area from fully participating in the reaction. Summary of the Invention

[0009] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the prior art, and to provide a lithium carbonate hydrocracking purification device.

[0010] A lithium carbonate hydrocracking purification apparatus, comprising:

[0011] outer cylinder;

[0012] An inner cylinder, which is located in the middle of the outer cylinder;

[0013] A flow guide tube, wherein the flow guide tube is disposed in the middle of the inner cylinder;

[0014] A rotating shaft with several upward rotating blades spaced apart is provided on the rotating shaft. The upward rotating blades are disposed inside the guide tube, and the edges of the upward rotating blades are close to the inner wall of the guide tube. The rotating shaft is driven to rotate by a first rotating motor so that the upward rotating blades convey the slurry in the guide tube upward.

[0015] An air inlet pipe, one end of which extends to the bottom of the guide tube, is used to supply carbon dioxide gas into the guide tube.

[0016] A filter screen, which is snapped between the outer cylinder and the inner cylinder;

[0017] The clarified liquid outlet pipe is installed on the side wall of the outer cylinder and is located above the filter screen.

[0018] A further embodiment is that an upper turntable is fixedly connected to the outer surface of the upper end of the rotating shaft, and a lower turntable is sleeved thereon. Several wedge-shaped blocks are distributed in a circular array on the lower surface of the upper turntable, and several transmission blocks are distributed in a circular array on the upper surface of the lower turntable. The transmission blocks cooperate with the inclined surfaces of the wedge-shaped blocks. The lower turntable is installed on a lifting plate, and both ends of the lifting plate extend to the inner wall of the outer cylinder. The upper surface of the lifting plate is connected to the top wall of the outer cylinder through a first spring. The lifting plate is used to drive the perforated needle to move up and down, so that the perforated needle can penetrate the mesh of the filter screen.

[0019] A further embodiment involves the lower surface of the lifting plate being connected to the outer ring of a rotary bearing via a first connecting rod, and the bottom end of the inner ring of the rotary bearing being connected to an annular plate via a second connecting rod. The inner ring of the rotary bearing is provided with gear teeth that mesh with cylindrical teeth, which are driven to rotate by a second rotary motor. Several fixed cylinders are spaced apart on the lower surface of the annular plate, and the interior of each fixed cylinder is connected to a sliding block via a second spring. The sliding block is connected to the top end of the perforated needle, and the second spring is in a compressed state. When the lifting plate drives the perforated needle to disengage from the filter screen, the lifting plate triggers a switching mechanism, which is used to activate the second rotary motor.

[0020] A further embodiment is that the switching mechanism includes a pressing rod, which is mounted on the upper surface of the lifting plate. The inner cylinder has a movable groove, and the end of the movable groove away from the outer cylinder is connected to a movable block via a third spring. The lower surface of the movable block is set as an inclined surface. When the movable block retracts into the movable groove, it connects the first conductive block and the second conductive block to start the second rotary motor. When the movable block extends out of the movable groove, it separates the first conductive block and the second conductive block.

[0021] A further embodiment is that a sliding groove is provided on one side of the movable groove, the first conductive block is installed on the movable block and slides in cooperation with the sliding groove, and the second conductive block is installed at the end of the sliding groove away from the outer cylinder.

[0022] A further embodiment is that the end of the air inlet pipe located inside the guide tube extends to the eccentric position of the guide tube and is fitted with a flexible tube. The flexible tube has several air outlet holes spaced apart. The bottom end of the rotating shaft is fixedly connected to a toggle block through a third connecting rod. The outer surface of the end of the flexible tube away from the air inlet pipe is provided with a fixing block that cooperates with the toggle block. The inside of the air inlet pipe is connected to one end of a spring plate. The other end of the spring plate extends to the position corresponding to the fixing block and then adheres to the inner surface of the flexible tube.

[0023] A further embodiment is that a slurry outlet pipe is fixedly connected to the bottom end of the outer cylinder, the end of the slurry outlet pipe away from the outer cylinder is connected to the inlet end of the chemical pump, and a slurry return pipe is fixedly connected to the outlet end of the chemical pump, which is connected to the bottom end of the guide cylinder.

[0024] A further option is to connect a replenishment pipe to the slurry outlet pipe.

[0025] A further option is that the chemical pump is a shear pump.

[0026] A further embodiment is that the side wall of the guide tube is provided with an annular cavity, and a spiral cooling water pipe is provided in the annular cavity. The two ends of the spiral cooling water pipe are connected to a cooling water inlet pipe and a cooling water outlet pipe, respectively.

[0027] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention drives the rotating shaft to rotate through the first rotating motor, which will drive the upper rotating blades to rotate together. During the rotation process, the upper rotating blades push the slurry in the guide tube upward, and at the same time break up the carbon dioxide bubbles in the rising process to form small bubbles. Since the slurry is restricted by the guide tube, the slurry can have more sufficient contact with the carbon dioxide gas, thereby achieving a full reaction and significantly improving the reaction efficiency;

[0028] (2) The present invention utilizes the cooperation of a rotating shaft, an upper turntable, a lower turntable, a wedge block, a transmission block, a lifting plate, a switching mechanism, an annular plate, a fixed cylinder, a sliding block, a first spring, a second spring, and a perforated needle. When the lifting plate moves downward, the perforated needles that are not aligned with the mesh holes of the filter screen will be blocked by the filter screen, thereby further compressing the second spring. This will not hinder the perforated needles corresponding to the mesh holes on the filter screen from clearing their corresponding mesh holes. When the lifting plate moves upward, the switching mechanism will be triggered only when the bottom end of the perforated needle leaves the filter screen. At this time, the second rotary motor drives the annular plate to rotate through the rotary bearing, and the annular plate drives the perforated needles to rotate together, which facilitates the perforated needles to clear the mesh holes in other positions of the filter screen, thus achieving a comprehensive cleaning of the filter screen. Moreover, before the perforated needles move downward to contact the filter screen, the second rotary motor will stop driving the perforated needles to rotate, ensuring that the perforated needles have completely stopped rotating before contacting the filter screen.

[0029] (3) The present invention utilizes the cooperation of a rotating shaft, a fourth connecting rod, a moving block, a fixed block, a hose, an air inlet pipe, and a spring plate. During the rotation of the rotating shaft, the moving block will rotate synchronously and drive the fixed block to move accordingly, thereby causing the hose and the spring plate to bend. Since the connection between the hose and the air inlet pipe is located at the eccentric position of the guide tube, the moving block and the fixed block will gradually separate during the bending process. When the moving block and the fixed block are no longer in contact, under the reset action of the spring plate, the restoring force of the spring plate will cause the hose to quickly return to the initial position, thereby realizing the oscillation of the hose within a certain range. This oscillation helps the carbon dioxide gas overflowing from the hose to be more fully dispersed, thereby promoting the full contact between the carbon dioxide gas and the slurry.

[0030] (4) By setting a spiral cooling water pipe on the side wall of the guide tube, since the hydrocarbon reaction process is an exothermic reaction, the guide tube can be cooled down by the spiral cooling water pipe, which can maintain a low temperature inside the guide tube; and the lower temperature can increase the solubility of carbon dioxide gas, thereby promoting the reaction efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the body structure of a lithium carbonate hydrocracking purification device provided in an embodiment of the present invention;

[0032] Figure 2 Provided by the embodiments of the present invention Figure 1 A magnified view of the structure at point A in the middle;

[0033] Figure 3 Provided by the embodiments of the present invention Figure 1 A magnified schematic diagram of the structure at point B in the middle;

[0034] Figure 4 This is a three-dimensional structural diagram of the upward-spinning blade provided in an embodiment of the present invention;

[0035] Figure 5 This is a three-dimensional structural diagram of the upper turntable provided in an embodiment of the present invention;

[0036] Figure 6 This is a three-dimensional structural diagram of the lower turntable provided in an embodiment of the present invention;

[0037] Figure 7 This is a three-dimensional structural diagram of the annular plate and the perforated needle provided in an embodiment of the present invention;

[0038] Figure 8 This is a cross-sectional structural diagram of the fixing cylinder and the perforated needle provided in an embodiment of the present invention;

[0039] Figure 9 For the purposes of the embodiments of the present invention Figure 1 A magnified schematic diagram of the structure at point C in the middle;

[0040] Figure 10 This is a schematic diagram of the cross-sectional structure of the air intake pipe and hose provided in an embodiment of the present invention.

[0041] Reference numerals: 1. Outer cylinder; 2. Inner cylinder; 3. Guide cylinder; 4. First rotary motor; 5. Rotating shaft; 6. Upper rotating blade; 7. Upper turntable; 8. Lower turntable; 701. Wedge block; 801. Transmission block; 9. Lifting plate; 10. First spring; 11. First connecting rod; 12. Rotary bearing; 13. Second connecting rod; 14. Annular plate; 15. Fixed cylinder; 16. Second spring; 17. Sliding block; 18. Perforated needle; 19. Filter screen plate; 20. Second rotary motor; 21. Cylindrical tooth; 22. Switching mechanism; 221. Extrusion rod; 222. Live... 223. Moving block; 224. Third spring; 225. Movable groove; 226. Slide groove; 227. First conductive block; 228. Second conductive block; 229. Annular cavity; 20. Spiral cooling water pipe; 21. Cooling water inlet pipe; 220. Cooling water outlet pipe; 221. Third connecting rod; 222. Actuating block; 222. Fixed block; 33. Flexible hose; 34. Spring plate; 35. Air inlet pipe; 36. Slurry outlet pipe; 37. Slurry return pipe; 38. Chemical pump; 39. Make-up pipe; 40. Clarified liquid outlet pipe; 31. Fourth connecting rod; 322. Connecting groove; 43. Exhaust pipe. Detailed Implementation

[0042] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Please see Figure 1 The present invention provides a lithium carbonate hydrocarbon purification device, including an outer cylinder 1 with an opening at the upper end, an inner cylinder 2 inside the outer cylinder 1 with an opening at the lower end, and the inner wall of the inner cylinder 2 being connected to the outer wall of the guide cylinder 3 via a fourth connecting rod 38.

[0045] Please see Figure 1 and Figure 4 The top wall of the outer cylinder 1 is supported by a support frame, and the output end of the first rotary motor 4 is fixedly connected to a rotating shaft 5 via a coupling. The bottom end of the rotating shaft 5 extends downward to the bottom end of the guide cylinder 3, and several upward rotating blades 6 are spaced apart on the rotating shaft 5. The upward rotating blades 6 are disposed inside the guide cylinder 3, and the edges of the upward rotating blades 6 are close to the inner wall of the guide cylinder 3; correspondingly, an air inlet pipe 32 for supplying carbon dioxide gas is provided at the bottom of the guide cylinder 3. When the first rotary motor 4 drives the rotating shaft 5 to rotate, the rotating shaft 5 drives the upward rotating blades 6 to rotate. The upward rotating blades 6 transport the slurry in the guide cylinder 3 upward, and at the same time, the upward rotating blades 6 break up the rising carbon dioxide bubbles to form small bubbles. Since the slurry is confined inside the guide cylinder 3, the slurry can fully contact the carbon dioxide gas, thereby fully reacting and greatly improving the reaction efficiency.

[0046] Please continue reading. Figure 1A slurry outlet pipe 33 is fixedly connected to the bottom end of the outer cylinder 1. The end of the slurry outlet pipe 33 away from the outer cylinder 1 is connected to the inlet end of the chemical pump 35. A slurry return pipe 34 is fixedly connected to the outlet end of the chemical pump 35, and the slurry return pipe 34 is connected to the bottom end of the guide cylinder 3. A replenishment pipe 36 is connected to the slurry outlet pipe 33. In addition, a clarified liquid outlet pipe 37 is also installed on the side wall of the outer cylinder 1. Therefore, the lithium carbonate feedstock liquid and circulating liquid continuously enter from the bottom of the guide tube 3, rise along the guide tube 3 after being acted upon by the upward rotating blades 6 inside the guide tube 3, and undergo rapid and high-intensity mixing reaction with carbon dioxide gas inside the guide tube 3. The unreacted carbon dioxide gas escapes from the top of the outer cylinder 1, and the solution after reaction flows downward along the space between the inner cylinder 2 and the guide tube 3. During the flow, sedimentation and separation occur, and the slurry enriched with solid phase eventually settles to the bottom, mixes with the external circulating feedstock liquid, and is sent to the chemical pump 35; while the LiHCO3 clear liquid is transported outward through the clarified liquid outlet pipe 37.

[0047] Optionally, the chemical pump 35 can be a shear pump. The shear pump shears the lithium carbonate raw material liquid newly added through the replenishment pipe 36 and the incompletely reacted slurry transported through the slurry outlet pipe 33. This can break the coarse particles of the raw material into fine particles, thereby increasing the specific surface area of ​​the solid and further increasing the contact probability between the gas and solid phases, thus achieving the purpose of increasing the reaction efficiency.

[0048] A filter screen 19 is snapped between the outer cylinder 1 and the inner cylinder 2, and the clarified liquid outlet pipe 37 is located above the filter screen 19. Therefore, the filter screen 19 can filter the incompletely reacted slurry and prevent the solid phase in the incompletely reacted slurry from being discharged out through the clarified liquid outlet pipe 37.

[0049] To prevent unreacted solid phase in the slurry from clogging the mesh of the filter screen 19, an upper rotating disk 7 and a lower rotating disk 8 are fixedly connected to the outer surface of the upper end of the rotating shaft 5. Figure 5 and Figure 6As shown, the lower surface of the upper turntable 7 has a plurality of wedge-shaped blocks 701 arranged in a circular array, and the upper surface of the lower turntable 8 has a plurality of transmission blocks 801 arranged in a circular array. The transmission blocks 801 cooperate with the inclined surfaces of the wedge-shaped blocks 701. In addition, the lower turntable 8 is mounted on a lifting plate 9, and the two ends of the lifting plate 9 extend to the inner wall of the outer cylinder 1 through the connecting grooves 39 opened on the side wall of the inner cylinder 2. The upper surface of the lifting plate 9 is connected to the top wall of the outer cylinder 1 by a first spring 10, while the lower surface of the lifting plate 9 is fitted with perforated needles 18 through a connecting structure. When the first rotary motor 4 drives the rotating shaft 5 to rotate, it will cause the inclined surface of the wedge block 701 to press against the transmission block 801, causing the lifting plate 9 to move downward, thereby allowing the pore-clearing needle 18 to penetrate the mesh holes on the filter screen plate 19, thus clearing the blocked mesh holes; after the wedge block 701 separates from the transmission block 801, under the reset action of the first spring 10, it will drive the lifting plate 9 to reset upward, so that the bottom end of the pore-clearing needle 18 moves to the top of the filter screen plate 19, making it easier for the pore-clearing needle 18 to clear the mesh holes of the filter screen plate 19 again.

[0050] For further details, please refer to Figure 1 , Figure 3 , Figure 7 and Figure 8 The lower surface of the lifting plate 9 is connected to the outer ring of the rotary bearing 12 via a first connecting rod 11, and the lower surface of the inner ring of the rotary bearing 12 is connected to the annular plate 14 via a second connecting rod 13. The inner ring of the rotary bearing 12 is provided with gear teeth that mesh with cylindrical teeth 21, which are driven to rotate by a second rotary motor 20. A plurality of fixed cylinders 15 are spaced apart on the lower surface of the annular plate 14. The fixed cylinders 15 are discretely arranged, and the interior of each fixed cylinder 15 is connected to a sliding block 17 via a second spring 16. The sliding block 17 slides within the fixed cylinder 15, and its lower surface is connected to the top end of the perforated needle 18. The second spring 16 is in a compressed state. Furthermore, when the lifting plate 9 drives the perforated needle 18 to disengage from the filter screen plate 19 and continue to move upward, the lifting plate 9 will trigger the switching mechanism 22, which is used to activate the second rotary motor 20. Therefore, when the lifting plate 9 moves downward, the perforation needles 18 that are not aligned with the mesh holes of the filter plate 19 will be blocked by the filter plate 19, thereby further compressing the second spring 16. This will not prevent the perforation needles 18 corresponding to the mesh holes on the filter plate 19 from clearing their corresponding mesh holes. In addition, after the lifting plate 9 moves upward and triggers the switching mechanism 22, the second rotary motor 20 will drive the annular plate 14 to rotate through the rotary bearing 12, which will in turn drive the perforation needles 18 to rotate together. This facilitates the perforation needles 18 to clear the mesh holes in other positions of the filter plate 19, achieving a comprehensive cleaning of the filter plate 19. Moreover, since the lifting plate 9 moves upward, it will bring the perforation needles 18 above the filter plate 19, ensuring that the filter plate 19 will not obstruct the annular plate 14 from driving the perforation needles 18 to rotate.

[0051] It should be noted that the second rotary motor 20 can be directly installed on the lifting plate 9 or on the outer wall of the inner cylinder 2. Those skilled in the art can determine the appropriate installation method based on the actual situation.

[0052] Optionally, please refer to Figure 1 and Figure 2 The switching mechanism 22 includes a pressing rod 221, which is mounted on the upper surface of the lifting plate 9. A movable groove 224 is provided on the inner cylinder 2. The end of the movable groove 224 away from the outer cylinder 1 is connected to a movable block 222 via a third spring 223. The lower surface of the movable block 222 is set as an inclined surface. A sliding groove 225 is provided on one side of the movable groove 224. A first conductive block 226 is mounted on the movable block 222 and slides in cooperation with the sliding groove 225. A second conductive block 227 is mounted on the end of the sliding groove 225 away from the outer cylinder 1. When the lifting plate 9 rises to a certain level, the bottom end of the perforated needle 18 has detached from the filter screen plate 19. At this time, the pressing rod 221 on the lifting plate 9 pushes the movable block 222 into the movable groove 224. The movable block 222 then drives the first conductive block 226 to approach and contact the second conductive block 227. After the first conductive block 226 and the second conductive block 227 contact each other, the second rotary motor 20 is powered on and started. When the lifting plate 9 descends to a certain position, the pressing rod 221 on the lifting plate 9 no longer presses the movable block 222. At this time, under the reset action of the third spring 223, the first conductive block 226 and the second conductive block 227 separate, causing the second rotary motor 20 to be de-energized. The second rotary motor 20 stops driving the perforated needle 18 to rotate, ensuring that the perforated needle 18 has completely stopped rotating before contacting the filter screen plate 19.

[0053] Preferably, the side wall of the guide tube 3 has an annular cavity 23, and a spiral cooling water pipe 24 is disposed in the annular cavity 23. The two ends of the spiral cooling water pipe 24 are connected to a cooling water inlet pipe 25 and a cooling water outlet pipe 26, respectively. Since the hydrocarbon reaction is an exothermic reaction, cooling the guide tube 3 through the spiral cooling water pipe 24 can maintain a lower temperature inside the guide tube 3; and the lower temperature can increase the solubility of carbon dioxide gas, thereby promoting reaction efficiency.

[0054] Please see Figure 9 and Figure 10The air inlet pipe 32, located inside the guide tube 3, extends to an eccentric position within the guide tube 3 and is fitted with a flexible hose 30. The hose 30 is securely fixed to the air inlet pipe 32 using a clamp. Multiple air outlets are spaced apart on the hose 30, through which carbon dioxide gas escapes. A toggle block 28 is fixedly connected to the bottom end of the rotating shaft 5 via a third connecting rod 27. A fixing block 29, cooperating with the toggle block 28, is provided on the outer surface of the end of the hose 30 furthest from the air inlet pipe 32. One end of a spring plate 31 is welded to the inside of the air inlet pipe 32. The other end of the spring plate 31 extends to a position corresponding to the fixing block 29 and is tightly adhered to the inner surface of the hose 30. The spring plate 31 not only supports the hose 30 but also enhances its recovery ability after deformation. During the rotation of the rotating shaft 5, the actuating block 28 also rotates synchronously. When the actuating block 28 comes into contact with the fixed block 29, the fixed block 29 will move accordingly, causing the hose 30 and the spring plate 31 to bend. Since the connection between the hose 30 and the air inlet pipe 32 is located at an eccentric position at the bottom of the guide tube 3, the actuating block 28 and the fixed block 29 will gradually separate during the bending process. When the actuating block 28 and the fixed block 29 are no longer in contact, under the restoring action of the spring plate 31, the restoring force of the spring plate 31 will cause the hose 30 to quickly return to its initial position, thereby realizing the oscillation of the hose 30 within a certain range. This oscillation helps the carbon dioxide gas overflowing from the hose 30 to be more fully dispersed, thereby promoting the full contact between the carbon dioxide gas and the slurry.

[0055] Preferably, an exhaust pipe 40 is provided on the top wall of the inner cylinder 2, through which unreacted gas phase can be discharged.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0057] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0058] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lithium carbonate hydrocracking purification apparatus, characterized in that, include: outer cylinder (1); Inner cylinder (2), which is located in the middle of outer cylinder (1); A flow guide tube (3) is disposed in the middle of the inner cylinder (2); A rotating shaft (5) is provided with a plurality of upward rotating blades (6) at intervals. The upward rotating blades (6) are provided inside the guide tube (3), and the edges of the upward rotating blades (6) are close to the inner wall of the guide tube (3). The rotating shaft (5) is driven to rotate by a first rotating motor (4) so ​​that the upward rotating blades (6) convey the slurry in the guide tube (3) upward. An air inlet pipe (32) is provided, one end of which extends to the bottom of the guide tube (3). The air inlet pipe (32) is used to supply carbon dioxide gas into the guide tube (3). A filter screen (19) is snapped between the outer cylinder (1) and the inner cylinder (2); Clarified liquid outlet pipe (37) is installed on the side wall of the outer cylinder (1) and is located above the filter screen plate (19); The upper outer surface of the rotating shaft (5) is fixedly connected to an upper turntable (7) and a lower turntable (8) is sleeved thereon. The lower surface of the upper turntable (7) is arranged in a ring array with several wedge blocks (701), and the upper surface of the lower turntable (8) is arranged in a ring array with several transmission blocks (801). The transmission blocks (801) cooperate with the inclined surfaces of the wedge blocks (701). The lower turntable (8) is installed on the lifting plate (9). The two ends of the lifting plate (9) extend to the inner wall of the outer cylinder (1). The upper surface of the lifting plate (9) is connected to the top wall of the outer cylinder (1) through a first spring (10). The lifting plate (9) is used to drive the perforated needle (18) to move up and down so that the perforated needle (18) penetrates the mesh on the filter screen plate (19). The lower surface of the lifting plate (9) is connected to the outer ring of the rotary bearing (12) via the first connecting rod (11). The bottom end of the inner ring of the rotary bearing (12) is connected to the annular plate (14) via the second connecting rod (13). The inner ring of the rotary bearing (12) is provided with gear teeth that mesh with the cylindrical teeth (21). The cylindrical teeth (21) are driven to rotate by the second rotary motor (20). The lower surface of the annular plate (14) is provided with several fixed cylinders (15) at intervals. The inside of the fixed cylinder (15) is connected to the sliding block (17) via the second spring (16). The sliding block (17) is connected to the top end of the perforated needle (18). The second spring (16) is in a compressed state. When the lifting plate (9) drives the perforated needle (18) to disengage from the filter screen plate (19), the lifting plate (9) triggers the switching mechanism (22). The switching mechanism (22) is used to conduct the second rotary motor (20).

2. The lithium carbonate hydrocracking purification apparatus according to claim 1, characterized in that: The switching mechanism (22) includes a pressing rod (221), which is installed on the upper surface of the lifting plate (9). The inner cylinder (2) has a movable groove (224). The end of the movable groove (224) away from the outer cylinder (1) is connected to the movable block (222) through a third spring (223). The lower surface of the movable block (222) is set as an inclined surface. When the movable block (222) retracts into the movable groove (224), the movable block (222) conducts the first conductive block (226) and the second conductive block (227) to start the second rotary motor (20). When the movable block (222) extends out of the movable groove (224), the movable block (222) separates the first conductive block (226) and the second conductive block (227).

3. The lithium carbonate hydrocracking purification apparatus according to claim 2, characterized in that: The movable groove (224) has a sliding groove (225) on one side. The first conductive block (226) is installed on the movable block (222) and slides in cooperation with the sliding groove (225). The second conductive block (227) is installed at the end of the sliding groove (225) away from the outer cylinder (1).

4. The lithium carbonate hydrocracking purification apparatus according to claim 1, characterized in that: The end of the air inlet pipe (32) located inside the guide tube (3) extends to the eccentric position of the guide tube (3) and is fitted with a hose (30). The hose (30) is provided with several air outlet holes spaced apart. The bottom end of the rotating shaft (5) is fixedly connected to a toggle block (28) through a third connecting rod (27). The outer surface of the end of the hose (30) away from the air inlet pipe (32) is provided with a fixing block (29) that cooperates with the toggle block (28). The inside of the air inlet pipe (32) is connected to one end of the spring plate (31). The other end of the spring plate (31) extends to the position corresponding to the fixing block (29) and then adheres to the inner surface of the hose (30).

5. The lithium carbonate hydrocracking purification apparatus according to claim 1, characterized in that: The bottom end of the outer cylinder (1) is fixedly connected to a slurry outlet pipe (33). The end of the slurry outlet pipe (33) away from the outer cylinder (1) is connected to the inlet end of the chemical pump (35). The outlet end of the chemical pump (35) is fixedly connected to a slurry return pipe (34). The slurry return pipe (34) is connected to the bottom end of the guide cylinder (3).

6. The lithium carbonate hydrocracking purification apparatus according to claim 5, characterized in that: A replenishment pipe (36) is connected to the slurry outlet pipe (33).

7. The lithium carbonate hydrocracking purification apparatus according to claim 5, characterized in that: The chemical pump (35) is a shear pump.

8. The lithium carbonate hydrocracking purification apparatus according to claim 1, characterized in that: The guide tube (3) has an annular cavity (23) on its side wall. A spiral cooling water pipe (24) is installed in the annular cavity (23). The two ends of the spiral cooling water pipe (24) are connected to the cooling water inlet pipe (25) and the cooling water outlet pipe (26) respectively.

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