A device for improving the efficiency of removing thallium from lithium leaching solution

Abstract

The application discloses a device for improving the thallium removal efficiency of lithium leaching solution, which comprises a tank body, a mounting seat is arranged on the tank body, and further comprises a connecting table, a volumetric pump, and a main feed inlet.

Description

Technical Field

[0001] This application relates to the field of thallium removal technology from lithium leaching solutions, and in particular to a device for improving the efficiency of thallium removal from lithium leaching solutions. Background Technology

[0002] In the process design of lithium extraction from lepidolite, "thallium removal" has become a standard and essential wastewater treatment unit to ensure that the thallium content of the backwash filtrate stably meets the emission standards before reuse or discharge.

[0003] However, traditional thallium removal processes using leachate often rely on manual labor, which can lead to problems such as unstable process parameters, low thallium removal efficiency, and long processing times.

[0004] Therefore, it is necessary to propose a device to improve the efficiency of thallium removal from lithium leaching solutions and enhance the stability of thallium removal process parameters, which has become an important technical problem that urgently needs to be solved. Utility Model Content

[0005] This application provides a device for improving the thallium removal efficiency of lithium leaching solutions, aiming to solve the problem that the traditional thallium removal process of leaching solutions in the prior art often relies on manual operation, which leads to unstable process parameters, low thallium removal efficiency and long time consumption.

[0006] To achieve the above objectives, this application proposes an apparatus for improving the thallium removal efficiency of lithium leaching solution, comprising a tank body with a mounting base on the tank body, and further comprising: a connecting platform connected to the mounting base; a volumetric pump mounted on the connecting platform; and a main feed inlet located in the tank body and connected to the volumetric pump.

[0007] In some embodiments, the system further includes: a pH value detection sensor disposed on the tank body; and a first feed inlet disposed on the tank body to deliver lime slurry solution to the tank body.

[0008] In some embodiments, the device further includes: a stirring drive mounted on a mounting base; a stirring shaft connected to the stirring drive to drive the stirring shaft to rotate; and stirring blades disposed on the stirring shaft.

[0009] In some embodiments, the system further includes: a first discharge port disposed at the bottom of the tank; and a second discharge port disposed at the bottom of the tank.

[0010] In some embodiments, the device further includes a filter screen, wherein the filter screen is disposed at the end of the second discharge port.

[0011] This application proposes a device for improving the thallium removal efficiency of lithium leaching solution. The device includes a tank with a mounting base, a connecting platform connected to the mounting base, a volumetric pump mounted on the connecting platform, and a main inlet located in the tank and connected to the volumetric pump. The lithium leaching solution is pumped into the tank by the volumetric pump. A thallium removal promoter, catalyst, and flocculant are added sequentially according to a programmed sequence, with each reaction time set to ensure complete reaction. This application reduces the processing time for a single tank of backflow filtrate from 1 hour (traditional manual operation) to 45 minutes, while significantly improving material preparation accuracy (error <1%) and thallium removal efficiency (thallium removal rate in the leaching solution increases from 85% manually to ≥90%). It effectively solves the problem of process fluctuations caused by inconsistent operation, improves process stability, and is highly suitable for heavy metal wastewater treatment and hazardous waste resource utilization. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of a device for improving the thallium removal efficiency of lithium leaching solution according to an embodiment of this application; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0013] In the diagram: 1. Tank body; 2. Main feed inlet; 3. Solenoid valve; 4. Volumetric pump; 5. Connecting platform; 6. Connecting pipe; 7. Stirring drive; 8. Mounting base; 9. Viewing window; 10. First sub-feed inlet; 11. pH value detection sensor; 12. First discharge port; 13. Stirring blade; 14. Mounting lug; 15. Stirring shaft; 16. Second discharge port; 17. Positioning platform; 18. Filter screen. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0015] See Figure 1As shown, this application proposes an apparatus for improving the thallium removal efficiency of lithium leaching solution, including a tank body 1, a mounting base 8 provided on the tank body 1, and further including: a connecting platform 5, the connecting platform 5 being connected to the mounting base 8; a volumetric pump 4, the volumetric pump 4 being installed on the connecting platform 5; and a main feed inlet 2, the main feed inlet 2 being provided on the tank body 1 and connected to the volumetric pump 4.

[0016] Tank 1 is the structural foundation of the device, and all other structures on the device are directly or indirectly connected to Tank 1. Mounting base 8 is welded to the top of Tank 1. Connecting platform 5 is connected to mounting base 8 by screws, and connecting platform 5 is the foundation of structures such as volumetric pump 4.

[0017] The volumetric pump 4 is the core structure of the device. The lithium leaching solution is pumped into the tank 1 via the volumetric pump 4 to accurately control the pumping volume. This improves the stability of process parameters, and the high pumping speed of the volumetric pump 4 helps save time required for the thallium removal process. The volumetric pump 4 is equipped with a connecting pipe 6, which connects to the lithium leaching solution tank. A solenoid valve 3 is also installed on the connecting pipe between the volumetric pump 4 and the main feed inlet 2 to control the opening and closing of the lithium leaching solution inlet passage.

[0018] In this embodiment, the tank 1 is also equipped with a second, third, and fourth feed inlet. Each of the second, third, and fourth feed inlets is equipped with a corresponding pump to achieve automatic feeding and precise control of the feeding amount. The second feed inlet is used to add thallium removal accelerators, such as sodium hypochlorite, potassium permanganate, and sodium persulfate; the third feed inlet is used to add iron / aluminum hydroxide flocculants; and the fourth feed inlet is used to add catalysts to accelerate the oxidation reaction process.

[0019] Specifically, the lithium leaching solution is pumped into tank 1 by volumetric pump 4. Thallium removal promoter, catalyst and flocculant are added in sequence according to the programmed order, and the reaction time is set for each to ensure sufficient reaction. Through the above scheme, this application shortens the treatment time of single tank return filtrate from 1 hour of traditional manual operation to 45 minutes. At the same time, it significantly improves the material preparation accuracy (error <1%) and thallium removal efficiency (thallium removal rate in leaching solution is increased from 85% by manual operation to ≥90%). It effectively solves the problem of process fluctuation caused by inconsistent operation, improves process stability, and is very suitable for heavy metal wastewater treatment and hazardous waste resource utilization.

[0020] This system also includes a PLC (Programmable Logic Controller), with start / stop buttons for the volumetric pump 4 and other pumps connected to the PLC. The PLC controls the start and stop of the volumetric pump 4 and other pumps, and also controls the pumping rates of lithium leaching solution, thallium removal promoter, catalyst, and flocculants. A timer within the PLC controls the reaction time, ensuring a complete reaction and shortening the total time required for the thallium removal process.

[0021] See Figure 1 As shown, in some embodiments, the system further includes: a pH value detection sensor 11, which is disposed on the tank body 1; the pH value detection sensor 11 is used to detect the pH value of the solution in the tank body 1. A first feed inlet 10, disposed on the tank body 1, is used to feed lime slurry solution into the tank body 1. The first feed inlet 10 is used to add lime slurry solution to adjust the pH value of the solution in the tank body 1. By real-time detection of the pH value, the amount of lime slurry solution added is controlled according to the detected pH value to keep the pH value of the solution in the tank body 1 within the pH range required by the process. After pumping in the lithium leaching solution, the pH value needs to be adjusted first, and then the thallium removal accelerator, catalyst, and flocculants are pumped in.

[0022] In this embodiment, the pH sensor 11 mainly consists of a pH electrode and a reference electrode. When the pH electrode is placed in the test solution, a special material on its surface reacts with hydrogen ions in the water, generating a weak electrical signal. The reference electrode provides a stable voltage that determines a reference potential in the same solution. Specifically, the sensitive glass membrane in the pH electrode reacts with hydrogen ions, resulting in a pressure difference between positive and negative ions inside the glass. This pressure difference induces an internal current, outputting a weak electrical signal. When the difference between the potential of the reference electrode and the potential of the pH electrode remains constant, this electrical signal can be accurately converted into a specific pH value. The common pH range is 0-14.

[0023] See Figure 1 As shown, in some embodiments, the system further includes: a stirring drive 7, which is mounted on a mounting base 8; the stirring drive 7 is mounted on the mounting base 8 by fasteners such as screws. A stirring shaft 15 is connected to the stirring drive 7 to drive the stirring shaft 15 to rotate; the stirring drive 7 is provided with an output shaft, which is connected to the stirring shaft 15 via a coupling. The stirring shaft 15 is preferably composed of two shaft sections connected together, which can be connected together by fasteners such as screws or by welding. A stirring blade 13 is disposed on the stirring shaft 15. The stirring blade 13 is welded to the stirring shaft 15, and the stirring drive 7 drives the stirring blade 13 to rotate, so that the liquid in the tank 1 is fully stirred, allowing the solution in the tank 1 to react fully.

[0024] See Figure 1 and Figure 2As shown, in some embodiments, the tank body 1 further includes: a first discharge port 12, located at the bottom of the tank body 1; the first discharge port 12 is used to discharge sludge containing thallium ions. A second discharge port 16, also located at the bottom of the tank body 1, is used to discharge the leachate after thallium ion removal. Preferably, both the first discharge port 12 and the second discharge port 16 are equipped with corresponding control valves to control the opening or closing of the first discharge port 12 and the second discharge port 16. After the reaction is completed, the materials are discharged sequentially according to the order of addition, achieving full-process automation. More preferably, the tank body 1 is also equipped with a flushing port to clean the inner wall of the tank body 1 by flushing with water, preventing waste residue from remaining on the inner wall of the tank body 1.

[0025] See Figure 1 and Figure 2 As shown, in some embodiments, the system further includes a filter screen 18, which is disposed at the end of the second discharge port 16. The filter screen 18 is provided to initially prevent thallium-containing sludge from entering the second discharge port 16.

[0026] In this embodiment, a positioning platform 17 for positioning filter 18 is also provided on the second discharge port 16. The filter 18 is connected to the second discharge port 16 by means of adhesive or welding.

[0027] See Figure 1 As shown, in some embodiments, it further includes: a viewing window 9, which is disposed on the top of the tank 1; the viewing window 9 is used to observe the reaction inside the tank 1, and can be opened when necessary, allowing maintenance personnel to climb into the tank 1 through the viewing window 9. A mounting ear 14 is connected to the outer circumferential surface of the tank 1. The mounting ear 14 is welded to the tank 1, and has mounting holes through which it is connected to an external frame.

[0028] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A device for improving the thallium removal efficiency of lithium leaching solution, comprising a tank (1), wherein a mounting base (8) is provided on the tank (1), characterized in that, Also includes: Connecting platform (5), the connecting platform (5) is connected to the mounting base (8); A volumetric pump (4) is mounted on the connecting platform (5). Main feed inlet (2), the main feed inlet (2) is located in the tank body (1), and the main feed inlet (2) is connected to the volumetric pump (4).

2. The apparatus for improving the thallium removal efficiency of lithium leaching solution according to claim 1, characterized in that, Also includes: A pH value detection sensor (11) is disposed on the tank body (1); The first feed inlet (10) is provided on the tank (1) to deliver lime slurry solution to the tank (1).

3. The apparatus for improving the thallium removal efficiency of lithium leaching solution according to claim 1, characterized in that, Also includes: A stirring drive (7) is mounted on the mounting base (8); A stirring shaft (15) is connected to the stirring drive (7) to drive the stirring shaft (15) to rotate. A stirring blade (13) is mounted on the stirring shaft (15).

4. The apparatus for improving the thallium removal efficiency of lithium leaching solution according to claim 1, characterized in that, Also includes: The first discharge port (12) is located at the bottom of the tank body (1); The second discharge port (16) is located at the bottom of the tank (1).

5. The apparatus for improving the thallium removal efficiency of lithium leaching solution according to claim 4, characterized in that, Also includes: The filter screen (18) is provided at the end of the second discharge port (16).

6. The apparatus for improving the thallium removal efficiency of lithium leaching solution according to claim 1, characterized in that, Also includes: A viewing window (9) is provided on the top of the tank body (1); Mounting ear (14), the outer peripheral surface of the tank (1) is connected to the mounting ear (14).

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