A high-efficiency lithium sulfate solution calcium removal reactor

Abstract

This utility model discloses a high-efficiency lithium sulfate solution calcium removal reactor, relating to the field of lithium sulfate processing technology. It includes a reaction chamber with a lithium sulfate solution inlet and a calcium removal agent inlet mounted on its upper surface. An agitator shaft is installed inside the reaction chamber. Vertical rods are mounted above horizontal bars, and agitator blades are mounted on the agitator shaft. First scrapers are mounted on the outer sides of the horizontal bars, and second scrapers are mounted below the horizontal bars. A discharge pipe is installed at the bottom of the reaction chamber, and a conveying auger is fixedly connected to the agitator shaft. A water storage tank is installed on the left side of the reaction chamber. When cleaning the reaction chamber is required, a circulating water pump draws water from the water storage tank through a pumping pipe, and the water is sprayed through a cleaning nozzle on the discharge pipe to simply rinse the agitator blades. The agitator blades stir the cleaning solution in the reaction chamber, and together with the first and second scrapers, the interior of the reaction chamber is cleaned.

Description

Technical Field

[0001] This utility model relates to the field of lithium sulfate processing technology, specifically to a high-efficiency lithium sulfate solution calcium removal reactor. Background Technology

[0002] Lithium sulfate, as an important basic lithium salt in lithium compounds, is a key raw material for the preparation of metallic lithium, lithium-ion battery cathode materials, and lithium-based lubricating greases. With the rapid development of the new energy industry, global demand for lithium sulfate continues to rise, especially in the lithium-ion battery sector, where the reliance on high-purity lithium sulfate is deepening. For example, producing one ton of lithium iron phosphate cathode material requires approximately 0.35 tons of lithium sulfate, and the core performance characteristics of power batteries, such as energy density and cycle life, are directly limited by the purity and impurity content of lithium sulfate.

[0003] However, industrially prepared lithium sulfate solutions often contain impurity ions such as calcium, magnesium, sodium, and potassium, with calcium ions having a particularly significant impact on product quality. When lithium sulfate solutions are used in the preparation of lithium battery materials, calcium ions react with carbonate and phosphate ions to form insoluble calcium salt precipitates. These precipitates not only clog reaction pipelines and reduce equipment operating efficiency but also form lattice defects in the cathode material, leading to accelerated battery capacity decay and decreased cycle stability.

[0004] For example, Chinese utility model patent application number 202320587623.8 discloses an intelligent reactor for removing calcium from lithium sulfate solution. Through the arrangement of the reaction components, the heating tube is placed inside the main body of the machine and protected by a support column. This allows all the heat generated by the heating tube to be absorbed by lithium sulfate and sodium carbonate, reducing heat consumption and preventing lithium sulfate and sodium carbonate from affecting the lifespan of the heating tube. Simultaneously, the support column supports the inner and outer cylinders, and the meshing of two first bevel gears and two second bevel gears causes the inner and outer cylinders to rotate in opposite directions and at different speeds, increasing turbulence and thus improving mixing efficiency, reducing heat consumption, and consequently reducing the energy consumption of the heating tube. However, this device still has certain shortcomings.

[0005] Precipitates such as calcium carbonate will continuously adhere to the inner wall of the reaction tank and pipe joints, forming a stubborn scale layer. Manual cleaning requires a lot of time to disassemble parts, which is not only cumbersome but may also damage the seals due to frequent disassembly and assembly, increasing the risk of equipment leakage.

[0006] Therefore, we propose a high-efficiency lithium sulfate solution calcium removal reactor to solve the problems mentioned above. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency lithium sulfate solution calcium removal reactor to solve the problem mentioned in the background art that calcium carbonate and other precipitates on the inner wall of the reaction tank and pipe interfaces will continuously adhere to form a stubborn scale layer. Manual cleaning requires a lot of time to disassemble parts, which is not only cumbersome, but may also damage the seals due to frequent disassembly and assembly, increasing the risk of equipment leakage.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency lithium sulfate solution calcium removal reactor, comprising a reaction chamber, wherein a lithium sulfate solution inlet and a calcium removal agent inlet are installed on the upper surface of the reaction chamber, a stirring shaft is provided inside the reaction chamber, and horizontal bars are installed on the left and right sides below the stirring shaft, and vertical bars are installed above the horizontal bars, stirring blades are installed on the stirring shaft, a first scraper is installed on the outer side of the horizontal bars, and a second scraper is installed below the horizontal bars;

[0009] A discharge pipe is installed at the bottom of the reaction chamber, and a conveying auger is installed inside the discharge pipe. The conveying auger is fixedly connected to the stirring shaft.

[0010] A water storage tank is installed on the left side of the reaction chamber, and a circulating water pump is installed above the water storage tank. A water pumping pipe and a water outlet pipe are installed on the left and right sides of the circulating water pump, respectively, and a cleaning nozzle is installed on the water outlet pipe.

[0011] The cleaning nozzle is equipped with a protective cover on its outer side, and a connecting plate is installed on the top of the reaction chamber, with a threaded rod installed on the connecting plate.

[0012] Preferably, branch pipes are installed on both the front and rear sides below the calcium removal agent inlet, and the branch pipes are connected to the calcium removal agent inlet and are located inside the reaction chamber.

[0013] With the above structural design, the calcium removal agent is fed through a branch pipe, which disperses the feed and ensures that the calcium removal agent is evenly distributed in the reaction tank, thereby improving the reaction efficiency with the lithium sulfate solution.

[0014] Preferably, a mounting frame is installed above the reaction chamber, and a servo motor is installed above the mounting frame. The servo motor is connected to the stirring shaft below via an output shaft. The first scraper and the second scraper abut against the inner side wall and the inner bottom surface of the reaction chamber, respectively.

[0015] With the above structural design, the servo motor drives the stirring shaft to rotate, and the first and second scrapers are in close contact with the inner wall and bottom of the reaction tank to scrape off the sediment in real time and prevent scale buildup.

[0016] Preferably, a first spiral band is installed on the stirring shaft, and a second spiral band is installed between the vertical rods, with the first and second spiral bands rotating in opposite directions.

[0017] With the above structural design, the first and second spiral bands with opposite directions of rotation form convection, which accelerates the calcium precipitation reaction and ensures that the lithium sulfate solution removes calcium completely.

[0018] Preferably, a sealing cap is installed below the discharge pipe, and the sealing cap is detachably connected to the discharge pipe.

[0019] With the above structural design, the conveying auger of the discharge pipe is linked with the stirring shaft to prevent calcium precipitation from clogging the discharge pipe, and the sealing cover facilitates discharge and maintenance.

[0020] Preferably, the water pumping pipe is connected to the interior of the water storage tank, the water outlet pipe is a rigid water pipe, and the water outlet pipe is designed with an inclined structure near the cleaning nozzle. The inclination angle of the cleaning nozzle is designed according to the layout of the agitator.

[0021] With the above structural design, the cleaning nozzle sprays water at an angle, the stirring blades agitate the cleaning liquid, and the first and second scrapers work together to achieve automatic cleaning of the inside of the reaction tank without disassembling any parts.

[0022] Preferably, a movable block is installed on the threaded rod, the movable block is connected to the protective cover, the inner bottom surface of the protective cover is designed with a sloping structure, and a sliding groove is opened on the upper surface of the reaction box, and the movable block is slidably connected to the sliding groove.

[0023] With the above structural design, the threaded rod drives the protective cover to slide and cover the cleaning nozzle, preventing calcium deposits from splashing and clogging the nozzle, and the sloping design avoids cleaning fluid residue.

[0024] Compared with the prior art, the beneficial effects of this utility model are: This high-efficiency lithium sulfate solution calcium removal reactor:

[0025] 1. Automatic cleaning: When the reaction chamber needs to be cleaned, the circulating water pump draws water from the storage tank through the water pipe and sprays water through the cleaning nozzles of the water outlet pipe to simply rinse the stirring blades. The stirring blades agitate the cleaning solution in the reaction chamber, and together with the first and second scrapers, the interior of the reaction chamber is cleaned.

[0026] 2. Cleaning and Protection: When the cleaning nozzle is idle, rotating the threaded rod drives the movable block to slide, and the movable block drives the protective cover to move. The protective cover moves with the slide groove and is placed on the outside of the cleaning nozzle to prevent calcium precipitates in the reaction from splashing onto the cleaning nozzle and causing it to become blocked. At the same time, the inner bottom surface of the protective cover is designed with a sloping structure to ensure that there is no residual cleaning liquid inside the protective cover.

[0027] 3. Anti-clogging: After the reaction is completed, the sealed cap is opened, and the solution after the reaction is discharged through the conveying auger in the discharge pipe. The conveying auger prevents calcium precipitate from clogging the discharge pipe and helps to discharge the material smoothly. After the calcium precipitate is discharged, it is separated. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the upper surface structure of the reaction chamber of this utility model;

[0029] Figure 2 This is a schematic diagram of the main cross-section of the present invention;

[0030] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0031] Figure 4 This is a schematic diagram of the main structure of this utility model;

[0032] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of this utility model.

[0034] In the diagram: 1. Reaction chamber; 2. Lithium sulfate solution inlet; 3. Calcium removal agent inlet; 4. Branch pipe; 5. Mounting frame; 6. Servo motor; 7. Stirring shaft; 8. Horizontal bar; 9. Vertical bar; 10. Stirring blade; 11. First spiral belt; 12. Second spiral belt; 13. First scraper; 14. Second scraper; 15. Discharge pipe; 16. Sealing cover; 17. Conveying auger; 18. Water storage tank; 19. Circulating water pump; 20. Water suction pipe; 21. Water outlet pipe; 22. Cleaning nozzle; 23. Protective cover; 24. Connecting plate; 25. Threaded rod; 26. Movable block; 27. Slide groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0036] Please see Figures 1-4This utility model provides a technical solution: a high-efficiency lithium sulfate solution calcium removal reactor, including a reaction tank 1, a lithium sulfate solution inlet 2, a calcium removal agent inlet 3, a mounting frame 5, a servo motor 6, a stirring shaft 7, a crossbar 8, a vertical bar 9, a stirring blade 10, a first scraper 13, a second scraper 14, a discharge pipe 15, a sealing cover 16, a conveying auger 17, a water storage tank 18, a circulating water pump 19, a water extraction pipe 20, a water outlet pipe 21, a cleaning nozzle 22, a protective cover 23, a connecting plate 24, a threaded rod 25, a movable block 26, and a sliding groove 27. The upper surface of the reaction tank 1 is equipped with the lithium sulfate solution inlet 2 and the calcium removal agent inlet 3. The inside of the reaction tank 1 is equipped with a stirring shaft 7, and crossbars 8 are installed on both the left and right sides below the stirring shaft 7, and vertical bars 9 are installed above the crossbars 8. A stirring blade 10 is installed on the shaft 7. A first scraper 13 is installed on the outer side of the crossbar 8, and a second scraper 14 is installed below the crossbar 8. A mounting frame 5 is installed above the reaction tank 1, and a servo motor 6 is installed above the mounting frame 5. The servo motor 6 is connected to the stirring shaft 7 via an output shaft. The first scraper 13 and the second scraper 14 abut against the inner side wall and the inner bottom surface of the reaction tank 1, respectively. When the servo motor 6 is started, it drives the stirring shaft 7 to rotate via the output shaft. The stirring shaft 7 drives the stirring blade 10, the crossbar 8, the vertical bar 9, the first scraper 13, and the second scraper 14 to rotate, thus stirring the solution. The first scraper 13 and the second scraper 14 continuously scrape away the sediment on the inner wall and bottom surface of the reaction tank 1 to prevent scale buildup and facilitate subsequent cleaning of the interior of the reaction tank 1.

[0037] A discharge pipe 15 is installed at the bottom of the reaction chamber 1, and a conveying auger 17 is installed inside the discharge pipe 15. The conveying auger 17 is fixedly connected to the stirring shaft 7. A sealing cover 16 is installed at the bottom of the discharge pipe 15. The sealing cover 16 is detachably connected to the discharge pipe 15. After the reaction is completed, the sealing cover 16 is opened, and the solution after the reaction is discharged through the conveying auger 17 of the discharge pipe 15. The conveying auger 17 prevents calcium precipitate from clogging the discharge pipe 15 and helps to discharge the material smoothly. After the calcium precipitate is discharged, it is separated.

[0038] A water storage tank 18 is installed on the left side of the reaction chamber 1, and a circulating water pump 19 is installed above the water storage tank 18. A water pump 20 and a water outlet 21 are installed on the left and right sides of the circulating water pump 19, respectively. A cleaning nozzle 22 is installed on the water outlet 21. The water pump 20 is connected to the inside of the water storage tank 18. The water outlet 21 is a rigid water pipe. The position of the water outlet 21 near the cleaning nozzle 22 is designed with an inclined structure. The inclination angle of the cleaning nozzle 22 is designed according to the layout of the stirring components. When it is necessary to clean the reaction chamber 1, the circulating water pump 19 draws water from the water storage tank 18 through the water pump 20 and sprays water through the cleaning nozzle 22 of the water outlet 21 to simply rinse the stirring blades 10. The stirring blades 10 stir the cleaning liquid in the reaction chamber 1, and together with the first scraper 13 and the second scraper 14, the inside of the reaction chamber 1 is cleaned.

[0039] A protective cover 23 is provided on the outside of the cleaning nozzle 22. A connecting plate 24 is installed on the top of the reaction chamber 1, and a threaded rod 25 is installed on the connecting plate 24. A movable block 26 is installed on the threaded rod 25. The movable block 26 is connected to the protective cover 23. The inner bottom surface of the protective cover 23 is designed with a sloping structure. A sliding groove 27 is opened on the upper surface of the reaction chamber 1. The movable block 26 is slidably connected to the sliding groove 27. When the cleaning nozzle 22 is idle, the threaded rod 25 is rotated to drive the movable block 26 to slide. The movable block 26 drives the protective cover 23 to move. The protective cover 23 moves with the sliding groove 27, moving the protective cover 23 to cover the outside of the cleaning nozzle 22 to prevent calcium precipitation in the reaction from splashing onto the cleaning nozzle 22 and causing it to become blocked. At the same time, the inner bottom surface of the protective cover 23 is designed with a sloping structure so that there is no residual cleaning liquid inside the protective cover 23. Example

[0040] Please see Figure 5 This utility model provides a technical solution: a high-efficiency lithium sulfate solution calcium removal reactor, including branch pipe 4. The difference between this embodiment and Embodiment 1 is:

[0041] Branch pipes 4 are installed on both the front and rear sides below the calcium removal agent inlet 3. The branch pipes 4 are connected to the calcium removal agent inlet 3 and are located inside the reaction tank 1. The lithium sulfate solution is transported into the reaction tank 1 through the lithium sulfate solution inlet 2, and then the calcium removal agent is transported into the reaction tank 1 through the calcium removal agent inlet 3 to mix and react with the lithium sulfate solution. When the calcium removal agent is transported through the calcium removal agent inlet 3, the calcium removal agent in the calcium removal agent inlet 3 can be transported into the reaction tank 1 along the two branch pipes 4, avoiding the calcium removal agent from falling in one position and improving the reaction efficiency of the calcium removal agent and the lithium sulfate solution. Example

[0042] Please see Figure 6This utility model provides a technical solution: a high-efficiency lithium sulfate solution calcium removal reactor, comprising a first helical belt 11 and a second helical belt 12. The difference between this embodiment and Embodiment 1 is that:

[0043] A first spiral band 11 is installed on the stirring shaft 7, and a second spiral band 12 is installed between the vertical rods 9. The first spiral band 11 and the second spiral band 12 rotate in opposite directions. When the stirring shaft 7 rotates, it drives the first spiral band 11 and the second spiral band 12 to rotate. The first spiral band 11 and the second spiral band 12 stir the solution. The first spiral band 11 and the second spiral band 12, which rotate in opposite directions, form convection, which accelerates the calcium precipitation reaction.

[0044] It should be noted that, according to actual needs, a telescopic cover can be provided between the slide 27 and the movable block 26 in this application. The movable block 26 is located on the left and right sides of the slide 27 and is connected to the left and right sides of the inner wall of the slide 27. When the movable block 26 moves left and right under force, the slide 27 is not in an open state, which can play a certain role in dust prevention.

[0045] Working principle: When using this high-efficiency lithium sulfate solution calcium removal reactor, firstly, the lithium sulfate solution is transported into the interior of the reaction tank 1 through the lithium sulfate solution inlet 2. Then, the calcium removal agent is transported into the interior of the reaction tank 1 through the calcium removal agent inlet 3 to mix and react with the lithium sulfate solution. The servo motor 6 is started, and the servo motor 6 drives the stirring shaft 7 to rotate through the output shaft. The stirring shaft 7 drives the stirring blade 10, the horizontal bar 8, the vertical bar 9, the first scraper 13 and the second scraper 14 to rotate, stirring the solution. The first scraper 13 and the second scraper 14 continuously scrape off the precipitate on the inner wall and bottom of the reaction tank 1 to prevent scale buildup and facilitate subsequent cleaning of the interior of the reaction tank 1. After the reaction is completed, the sealing cover 16 is opened, and the reacted solution is discharged through the conveying auger 17 of the discharge pipe 15. The conveying auger 17 prevents calcium precipitate from clogging the discharge pipe 15 and helps to discharge the solution smoothly. After the calcium precipitate is discharged, it is separated.

[0046] When cleaning of reaction chamber 1 is required, circulating water pump 19 draws water from storage tank 18 through water pipe 20, and sprays water through cleaning nozzle 22 on outlet pipe 21 to simply rinse stirring blade 10. Stirring blade 10 agitates the cleaning solution in reaction chamber 1, and together with first scraper 13 and second scraper 14, achieves internal cleaning of reaction chamber 1. When cleaning nozzle 22 is idle, rotating threaded rod 25 drives movable block 26 to slide, and movable block 26 drives protective cover 23 to move. Protective cover 23 moves with slide groove 27, moving protective cover 23 to cover the outside of cleaning nozzle 22, preventing calcium precipitate from splashing onto cleaning nozzle 22 and causing blockage. At the same time, the inner bottom surface of protective cover 23 is designed with a slope structure, so that no cleaning solution remains inside protective cover 23, thus completing a series of operations. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0047] 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 high-efficiency lithium sulfate solution calcium removal reactor, comprising a reaction chamber (1), wherein a lithium sulfate solution inlet (2) and a calcium removal agent inlet (3) are installed on the upper surface of the reaction chamber (1), characterized in that: The reaction chamber (1) is equipped with a stirring shaft (7), and a crossbar (8) is installed on both the left and right sides below the stirring shaft (7). A vertical bar (9) is installed above the crossbar (8). A stirring blade (10) is installed on the stirring shaft (7). A first scraper (13) is installed on the outside of the crossbar (8). A second scraper (14) is installed below the crossbar (8). The reaction chamber (1) is equipped with a discharge pipe (15) at the bottom, and a conveying auger (17) is provided inside the discharge pipe (15). The conveying auger (17) is fixedly connected to the stirring shaft (7). A water storage tank (18) is installed on the left side of the reaction chamber (1), and a circulating water pump (19) is installed above the water storage tank (18). A water pump (20) and a water outlet pipe (21) are installed on the left and right sides of the circulating water pump (19), respectively, and a cleaning nozzle (22) is installed on the water outlet pipe (21). The cleaning nozzle (22) is provided with a protective cover (23) on the outside, and a connecting plate (24) is installed on the top of the reaction box (1), and a threaded rod (25) is installed on the connecting plate (24).

2. The high-efficiency lithium sulfate solution calcium removal reactor according to claim 1, characterized in that: The calcium removal agent inlet (3) is equipped with branch pipes (4) on both the front and rear sides below it. The branch pipes (4) are connected to the calcium removal agent inlet (3) and are located inside the reaction chamber (1).

3. The high-efficiency lithium sulfate solution calcium removal reactor according to claim 1, characterized in that: A mounting bracket (5) is installed above the reaction chamber (1), and a servo motor (6) is installed above the mounting bracket (5). The servo motor (6) is connected to the stirring shaft (7) via an output shaft below. The first scraper (13) and the second scraper (14) abut against the inner sidewall and the inner bottom surface of the reaction chamber (1), respectively.

4. The high-efficiency lithium sulfate solution calcium removal reactor according to claim 3, characterized in that: A first spiral band (11) is installed on the stirring shaft (7), and a second spiral band (12) is installed between the vertical rods (9). The first spiral band (11) and the second spiral band (12) rotate in opposite directions.

5. The high-efficiency lithium sulfate solution calcium removal reactor according to claim 1, characterized in that: A sealing cap (16) is installed below the discharge pipe (15), and the sealing cap (16) is detachably connected to the discharge pipe (15).

6. The high-efficiency lithium sulfate solution calcium removal reactor according to claim 1, characterized in that: The water pumping pipe (20) is connected to the interior of the water storage tank (18). The water outlet pipe (21) is a hard water pipe. The water outlet pipe (21) is inclined near the cleaning nozzle (22). The inclination angle of the cleaning nozzle (22) is designed according to the layout of the agitator.

7. The high-efficiency lithium sulfate solution calcium removal reactor according to claim 1, characterized in that: A movable block (26) is installed on the threaded rod (25). The movable block (26) is connected to the protective cover (23). The inner bottom surface of the protective cover (23) is designed with a sloping structure. A sliding groove (27) is opened on the upper surface of the reaction box (1). The movable block (26) is slidably connected to the sliding groove (27).

Images