Lithium hydroxide redissolving device

Abstract

The application discloses a lithium hydroxide resolubilization device, which comprises a temporary storage tank and a reaction tube, the reaction tube is arranged obliquely, the obliquely upward end of the reaction tube is communicated with the outlet end of the temporary storage tank along the axial direction of the reaction tube, the other end of the reaction tube is further connected with a resolubilization tank, a spiral agitator is further arranged in the reaction tube, the spiral agitator conveys materials upward along the axial direction of the reaction tube, a water supplement pipe is further arranged on the water supplement pipe, an electric regulating valve is arranged on the water supplement pipe, a density detection module for monitoring the concentration of a dissolved solution is further arranged on the reaction tube, the resolubilization device further comprises a controller, the controller is electrically connected with the spiral agitator, the electric regulating valve and the density detection module respectively, compared with the prior art, the reaction tube of the application can continuously feed materials, and the bottom of the reaction tube can continuously discharge materials, so that continuous production is realized, compared with the traditional intermittent production mode, the turnover efficiency of the equipment can be remarkably improved, and the purification efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of lithium hydroxide production equipment, specifically to a lithium hydroxide remelting device. Background Technology

[0002] Lithium hydroxide (LiOH) is an important raw material in the fields of lithium batteries, ceramics, glass and nuclear industry, and its purity directly affects the performance of downstream products.

[0003] In the lithium salt production process, the purification of crude lithium hydroxide is a key step, and the re-dissolution process is the core step to improve product purity. At present, some lithium industry plants still use intermittent re-dissolution process to carry out batch production in tanks. Although the above-mentioned process has a certain degree of flexibility and adaptability, its cumbersome operation and inability to carry out continuous operation result in low purification efficiency of lithium hydroxide. Utility Model Content

[0004] The main objective of this application is to provide a lithium hydroxide remelting device, which aims to solve the problem of low purification efficiency in the prior art.

[0005] This application achieves the above objectives through the following technical solutions: A lithium hydroxide remelting device includes a temporary storage tank; The reaction tube is inclined and its axial direction is such that one end of the reaction tube inclined upward is connected to the outlet end of the temporary storage tank, and its other end is connected to the redissolution tank. A spiral stirrer is disposed inside the reaction tube and conveys materials upward along the axial direction of the reaction tube; A water supply pipe is connected to the reaction pipe to deliver dissolving water into the reaction pipe; an electric regulating valve is installed on the water supply pipe. A density detection module is installed on the reaction tube to monitor the concentration of the solution; The controller is electrically connected to the spiral stirrer, the electric regulating valve and the density detection module.

[0006] Optionally, the temporary storage box includes a box body and a vibration box, with the vibration box inserted into the box body; the box body is provided with a plurality of sliding rods, each of which is fitted with a buffer spring; the vibration box is provided with a plurality of sliding holes adapted to each of the sliding rods; the bottom of the vibration box is provided with a perforated plate, and a vibration motor is also provided inside the vibration box.

[0007] Optionally, the box body is designed in a conical shape, and a discharge pipe is provided at the bottom of the box body. A rotary feed valve connected to the controller is provided on the discharge pipe.

[0008] Optionally, a plate and frame filter press and a filter are sequentially arranged between the reaction tube and the redissolution tank along the flow direction of the dissolving liquid.

[0009] Optionally, the spiral stirrer includes a drive motor and a rotating shaft connected to the power source. The rotating shaft is rotatably disposed inside the reaction tube, and a spiral pusher plate is also disposed on the rotating shaft.

[0010] Optionally, along the axis of the rotating shaft, a plurality of crushing rods for crushing large particles are also provided on the rotating shaft.

[0011] Optionally, along the axial direction of the reaction tube, one end of the reaction tube is provided with a feed pipe communicating with the temporary storage box, and the spiral pusher plate is located on the lower side of the feed pipe, and the distance between the spiral pusher plate and the feed pipe is 10-15cm.

[0012] Optionally, the reaction tube is also provided with a connecting pipe, which is connected to the water supply pipe, and the outlet end of the water supply pipe is positioned opposite the feed pipe.

[0013] Optionally, a support frame is also provided in the redissolving tank, a stirring motor is provided on the support frame, and a stirring paddle connected to the stirring motor is provided in the redissolving tank.

[0014] Optionally, the density detection module includes several electronic densitometers, and a horizontally arranged drainage tube is provided at the outlet end of the reaction tube. Both the drainage tube and the inlet end of the redissolution tank are equipped with electronic densitometers; each of the electronic densitometers is electrically connected to the controller.

[0015] Compared with the prior art, this application has the following beneficial effects: This application includes a temporary storage tank and a reaction tube, wherein the reaction tube is inclined, and one end of the reaction tube inclined upward is connected to the outlet end of the temporary storage tank, and the other end is connected to a redissolution tank. A spiral stirrer is also provided inside the reaction tube, and the spiral stirrer conveys materials upward along the axis of the reaction tube. A water supply pipe is also provided for conveying dissolving water, and an electric regulating valve is provided on the water supply pipe. A density detection module for monitoring the concentration of the solution is also provided on the reaction tube. The redissolution device also includes a controller, which is electrically connected to the spiral stirrer, the electric regulating valve and the density detection module respectively.

[0016] In use, crude lithium hydroxide stored in a temporary storage tank enters the reaction tube, while dissolving water is simultaneously supplied through a water supply tank. The crude lithium hydroxide and water gradually mix to form a solution. Under the influence of gravity, the solution automatically moves towards the outlet of the reaction tube. Simultaneously, because the spiral stirrer supplies material to the upper part of the reaction tube (its direction of action is opposite to the flow direction of the solution), it intensifies the fluctuation of the solution, thereby agitating it and ensuring uniform dissolution, which is beneficial for improving purification efficiency. Furthermore, the direction of the solution lifted by the spiral stirrer and the direction of the falling solution are opposite, creating a counter-current effect. This not only further improves the uniformity of mixing but also prolongs the residence time of the solution in the reaction tube, ensuring that the lithium hydroxide is fully dissolved. Secondly, compared with the prior art, the reaction tube of this application can continuously feed material and continuously discharge material from its bottom, thereby achieving continuous production. Compared with the traditional intermittent production method, it can significantly improve the turnover efficiency of the equipment, thereby improving the purification efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a lithium hydroxide remelting device provided in an embodiment of this application; Figure 2 An exploded view of a lithium hydroxide remelting device provided in an embodiment of this application; Figure 3 A cross-sectional view of the temporary storage box and reaction tube provided in an embodiment of this application; Figure 4 Exploded view of the temporary storage box; Figure 5 This is an exploded view of the reaction tube; Reference numerals: 1-Temporary storage tank, 2-Reaction tube, 3-Redissolving tank, 4-Water supply pipe, 5-Electric regulating valve, 6-Controller, 7-Discharge pipe, 8-Rotary feed valve, 9-Plate and frame filter press, 10-Filter, 11-Drive motor, 12-Rotating shaft, 13-Spiral pusher plate, 14-Crushing rod, 15-Feed pipe, 16-Connecting pipe, 17-Support frame, 18-Agitator motor, 19-Agitator paddle, 20-Electronic densitometer, 21-Drainage pipe, 101-Box body, 102-Vibration box, 103-Slide rod, 104-Buffer spring, 105-Sliding hole, 106-Perforated plate, 107-Vibration motor.

[0018] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "robot coordinate system and / or m" as an example, it includes a robot coordinate system solution, an m solution, or a solution where both the robot coordinate system and m are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] Implementation Method 1 Reference Figures 1 to 5 This embodiment, as another optional embodiment of this application, discloses a lithium hydroxide remelting device, including a temporary storage box 1. The temporary storage box 1 includes a box body 101 and a vibration box 102. The box body 101 is generally arranged in a square pyramid or conical structure, with openings at both ends. A discharge pipe 7 is integrally connected to its small end. The vibration box 102 is inserted into the box body 101. The top of both the box body 101 and the vibration box 102 are open, and both have flanges folded up on their tops. The vibrating box 102 has a plurality of sliding rods 103 on its flange, and each sliding rod 103 is evenly arranged around the axis of the box 101. The vibrating box 102 has a plurality of sliding holes 105 on its flange, and each sliding hole 105 is arranged around the axis of the vibrating box 102. Each sliding rod 103 corresponds to each sliding hole 105 and is inserted and connected. The vibrating box 102 is coaxial with the box 101. Furthermore, a buffer spring 104 is sleeved on each of the slide rods 103. The top end of the buffer spring 104 abuts against the bottom surface of the flange of the vibration box 102, and its bottom end abuts against the top surface of the flange of the box body 101. A limit nut is also threadedly connected to the top of the slide rod 103. A perforated plate 106 is also provided at the bottom of the vibration box 102. At the same time, a mounting frame is provided directly above the perforated plate 106 along the axial direction of the vibration box 102. The mounting frame is connected to the inner wall of the vibration box 102 by several connecting rods. A vibration motor is provided on the mounting frame. In use, crude lithium hydroxide is placed in the vibrating box 102, and the vibrating box 102 is driven to vibrate by the vibration motor 107. While discharging the crude lithium hydroxide, it can also prevent it from clogging the porous plate 106, thereby ensuring stable output of materials. The buffer spring 104 can reduce the vibration noise of the equipment. A rotary feed valve 8 is also provided on the discharge pipe 7. The opening size of the discharge pipe 7 can be controlled by the rotary feed valve 8, thereby controlling the material conveying speed, realizing dynamic adjustment of the remelting process, and ensuring that the equipment always operates in the best operating condition. Furthermore, the remelting device also includes a reaction tube 2, which is a cylindrical tubular structure. A spiral stirrer is installed inside the reaction tube 2. The spiral stirrer includes a drive motor 11 and a rotating shaft 12. The rotating shaft 12 is inserted into the reaction tube 2 and is coaxial with the reaction tube 2. The drive motor 11 is mounted on the reaction tube 2 and is poweredly connected to one end of the rotating shaft 12; Along the axis of the reaction tube 2, a rolling bearing connected to the rotating shaft 12 is provided at the upper end of the reaction tube 2, and a support ring is provided at the other end of the rotating shaft 12. The support ring is in contact with the inner wall of the reaction tube 2 to ensure the structural stability of the rotating shaft 12. A spiral pusher plate 13 is also provided on the outer surface of the rotating shaft 12. Furthermore, along the axis of the rotating shaft 12, a plurality of crushing rods 14 for crushing large particles of material are also provided on the rotating shaft 12; the crushing rods 14 can crush large particles of crude lithium hydroxide, thereby improving the dissolution efficiency. Furthermore, along the axial direction of the reaction tube 2, one end of the reaction tube 2 is provided with a feed pipe 15, and the other end is provided with a discharge port; The reaction tube 2 is inclined, and the section connected to the drive motor 11 is inclined upward, that is, the feed tube 15 is inclined upward, while the end with the discharge port is inclined downward, thus forming a certain slope. The feed pipe 15 is connected to the discharge pipe 7, thereby receiving the crude lithium hydroxide discharged from the temporary storage tank 1; The spiral pusher plate 13 is located below the feed pipe 15, and the distance between the spiral pusher plate 13 and the feed pipe 15 is 10-15cm.

[0024] By setting the distance between the spiral pusher plate 13 and the feed pipe 15, a blank area can be formed on the upper side of the reaction pipe 2, preventing the spiral pusher plate 13 from guiding some of the dissolved liquid through the feed pipe 15 into the discharge pipe 7 during operation.

[0025] Furthermore, a connecting pipe 16 is also provided on the reaction tube 2, and the remelting device also includes a water supply pipe 4, which is connected to the connecting pipe 16. An electric regulating valve 5 is also provided on the water supply pipe 4. The inlet end of the water supply pipe 4 is connected to an external water source; the outlet end of the water supply pipe 4 is positioned opposite the feed pipe 15. Since the outlet end of the water supply pipe 4 is set directly opposite the feed pipe 15, under the action of water pressure, the dissolved water will collide with the crude lithium hydroxide, dissolving the crude lithium hydroxide while dispersing it. The water volume can also be flexibly adjusted by the electric regulating valve 5. Furthermore, the resolution device also includes a redissolution tank 3, and a plate and frame filter press 9 and a filter 10 are arranged sequentially between the reaction tube 2 and the redissolution tank 3 along the flow direction of the dissolving liquid; The redissolving tank 3 is a cylindrical tank with an opening at the top. A support frame 17 is also provided inside the redissolving tank 3. A stirring motor 18 is provided on the support frame 17. A stirring paddle 19, which is powered by the stirring motor 18, is provided inside the redissolving tank 3. The dual filtration of the plate and frame filter press 9 and the filter 10 can remove large particulate impurities and insoluble substances from the solution, thereby improving the purity of the solution and improving the efficiency of subsequent purification. Furthermore, the remelting device also includes a density detection module, which includes several electronic densitometers 20. A drainage pipe 21 is also horizontally arranged at the outlet end of the reaction tube 2. Electronic densitometers 20 are arranged at the inlet ends of the drainage pipe 21 and the remelting tank 3. Each of the electronic densitometers 20 is electrically connected to the controller 6. The density of the solution at the outlet of the reaction tube 2 and the inlet of the redissolution tank 3 can be monitored in real time by the electronic densitometer 20. When the density of the solution is too high, the water flow rate is increased and the supply of crude lithium hydroxide is reduced. Conversely, the operation is reversed to ensure that the concentration of the solution is always within the optimal range and to ensure the stable operation of the equipment. In use, crude lithium hydroxide stored in a temporary storage tank enters the reaction tube, while dissolving water is simultaneously supplied through a water supply tank. The crude lithium hydroxide and water gradually mix to form a solution. Under the influence of gravity, the solution automatically moves towards the outlet of the reaction tube. Simultaneously, because the spiral stirrer supplies material to the upper part of the reaction tube (its direction of action is opposite to the flow direction of the solution), it intensifies the fluctuation of the solution, thereby agitating it and ensuring uniform dissolution, which is beneficial for improving purification efficiency. Furthermore, the direction of the solution lifted by the spiral stirrer and the direction of the falling solution are opposite, creating a counter-current effect. This not only further improves the uniformity of mixing but also prolongs the residence time of the solution in the reaction tube, ensuring that the lithium hydroxide is fully dissolved. Secondly, compared with the prior art, the reaction tube of this application can continuously feed material and continuously discharge material from its bottom, thereby achieving continuous production. Compared with the traditional intermittent production method, it can significantly improve the turnover efficiency of the equipment, thereby improving the purification efficiency.

[0026] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A lithium hydroxide remelting device, characterized in that, Including temporary storage box (1); The reaction tube (2) is inclined. Along the axial direction of the reaction tube (2), one end of the reaction tube (2) inclined upward is connected to the outlet end of the temporary storage tank (1), and the other end is connected to the redissolution tank (3). A spiral stirrer is disposed inside the reaction tube (2) and conveys materials upward along the axial direction of the reaction tube (2); A water supply pipe (4) is connected to the reaction pipe (2) to deliver dissolving water into the reaction pipe (2); an electric regulating valve (5) is provided on the water supply pipe (4); A density detection module is installed on the reaction tube (2) to monitor the concentration of the solution; The controller (6) is electrically connected to the spiral stirrer, the electric regulating valve (5) and the density detection module respectively.

2. The lithium hydroxide remelting device according to claim 1, characterized in that, The temporary storage box (1) includes a box body (101) and a vibration box (102), the vibration box (102) being inserted into the box body (101); the box body (101) is provided with a plurality of sliding rods (103), and each sliding rod (103) is fitted with a buffer spring (104); the vibration box (102) is provided with a plurality of sliding holes (105) adapted to each sliding rod (103); the bottom of the vibration box (102) is provided with a perforated plate (106), and a vibration motor (107) is also provided inside the vibration box (102).

3. The lithium hydroxide remelting device according to claim 2, characterized in that, The box (101) is cone-shaped, and a discharge pipe (7) is provided at the bottom of the box (101). A rotary feed valve (8) connected to the controller (6) is provided on the discharge pipe (7).

4. The lithium hydroxide remelting device according to claim 1, characterized in that, Along the flow direction of the dissolving liquid, a plate and frame filter press (9) and a filter (10) are sequentially arranged between the reaction tube (2) and the redissolving tank (3).

5. The lithium hydroxide remelting device according to claim 1, characterized in that, The spiral stirrer is powered by a drive motor (11) and a rotating shaft (12). The rotating shaft (12) is rotatably mounted inside the reaction tube (2). A spiral pusher plate (13) is also mounted on the rotating shaft (12).

6. The lithium hydroxide remelting device according to claim 5, characterized in that, Along the axis of the rotating shaft (12), a plurality of crushing rods (14) for crushing large particles are also provided on the rotating shaft (12).

7. A lithium hydroxide remelting device according to claim 5 or 6, characterized in that, Along the axial direction of the reaction tube (2), one end of the reaction tube (2) is provided with a feed pipe (15) that communicates with the temporary storage box (1). The spiral pusher plate (13) is located on the lower side of the feed pipe (15) and the distance between the spiral pusher plate (13) and the feed pipe (15) is 10-15cm.

8. The lithium hydroxide remelting device according to claim 7, characterized in that, The reaction tube (2) is also provided with a connecting pipe (16), which is connected to the water supply pipe (4), and the outlet end of the water supply pipe (4) is positioned opposite the feed pipe (15).

9. A lithium hydroxide remelting device according to claim 1, characterized in that, The redissolution tank (3) is also provided with a support frame (17), a stirring motor (18) is provided on the support frame (17), and a stirring paddle (19) is provided in the redissolution tank (3) and is powered by the stirring motor (18).

10. A lithium hydroxide remelting device according to claim 1, characterized in that, The density detection module includes several electronic densitometers (20), and a drainage tube (21) is horizontally arranged at the outlet end of the reaction tube (2). Both the drainage tube (21) and the inlet end of the redissolution tank (3) are equipped with electronic densitometers (20); each of the electronic densitometers (20) is electrically connected to the controller (6).

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