Gas-liquid-liquid reactor for preparing battery-grade lithium carbonate

Abstract

The invention discloses a gas-liquid-liquid reactor for preparing battery-grade lithium carbonate, and relates to the technical field of lithium carbonate preparation equipment application, the gas-liquid-liquid reactor comprises a tank body, a driving mechanism is installed at the top of the tank body, a motor frame is fixedly connected to the top of the tank body, a driving motor is fixedly connected to the top of the motor frame, and an output shaft of the driving motor is fixedly connected with a driving rod; a plurality of rotating discs are fixedly connected to the driving rod in an array mode, a first hollow sleeve is fixedly connected to the upper portion of the interior of the tank body, and the driving rod is movably arranged in the first hollow sleeve in a sleeved mode. According to the equipment, bubbles in gas bubbling upwards from the lower surface of the tank body can be broken through rotation of the rotating disc, the reaction rate with liquid is increased, meanwhile, gas-liquid-liquid reaction observation of battery-grade lithium carbonate is carried out through a plurality of observation openings, flow speed control treatment of flowing of different liquids can be carried out through a plurality of partition plates, and the gas-liquid-liquid reaction observation efficiency is improved. Different liquids are injected through the heavy phase inlet, the light phase inlet, the light phase outlet and the heavy phase outlet.

Description

Technical Field

[0001] The invention relates to an application technology of lithium carbonate preparation equipment, and in particular to a gas-liquid-liquid reactor for preparing battery-grade lithium carbonate. Background Art

[0002] Lithium is one of the important metal resources. Lithium compounds are widely used in batteries, glass and ceramic industries. In recent years, due to the rapid development of electronic products such as electric vehicles and energy storage equipment, the demand for lithium resources has shown a substantial growth in the past few decades. Liquid lithium resources account for 61.8% of the global lithium resource reserves, and solid lithium resources account for 38.2%. my country's lithium reserves are 1 million tons (accounting for 7.14%), ranking fourth in the world. my country's ore lithium resources account for 29%, mainly distributed in Sichuan, Jiangxi, Hunan, Xinjiang and other regions. Salt lake lithium resources are rich, accounting for about 71% of the total reserves, mainly concentrated in Qinghai, Tibet and other places. The areas where Tibet's salt lake brine mines are located lack industrial infrastructure such as water and electricity, poor development conditions, fragile ecological environment, and inconvenient transportation, making lithium resource development difficult. Qinghai's salt lake brine is rich in lithium resources, but the magnesium-lithium separation and lithium extraction of salt lake brine with a high magnesium-to-lithium ratio (tens to hundreds or even thousands) are global problems, and extraction technology The difficulty is high, the lithium extraction rate is low, the lithium resources are seriously wasted, the magnesium resources are abandoned, the comprehensive utilization of resources is low, the competitiveness of the lithium industry is not strong, and there is a lack of high-end / high-purity lithium product production technology. Lithium carbonate (Li2CO3) is the basic raw material for the preparation of various lithium compounds and is widely used in batteries, medicine, refrigeration, organic synthesis, ceramics and other industries. In recent years, with the application of lithium-ion batteries in electronic products, new energy electric vehicles and other fields, the demand for battery-grade lithium carbonate, an important basic raw material for lithium-ion batteries, has increased sharply. Among them, battery-grade lithium carbonate is the key raw material for the production of lithium-ion battery positive electrode materials, such as lithium cobalt oxide batteries, ternary batteries, etc. In addition, battery-grade lithium carbonate, as an electrolyte additive for lithium-ion batteries, can not only significantly improve the safety performance of the battery, but also prolong the service life. Therefore, the improvement of the preparation process of battery-grade lithium carbonate plays an important role in promoting the development of the lithium-ion battery industry;

[0003] At present, whether it is to extract lithium from ore and salt lake brine to prepare Li2CO3 or to recycle and prepare Li2CO3 from secondary resource lithium-ion batteries, sodium carbonate is generally used to directly precipitate lithium to obtain crude Li2CO3 or industrial-grade Li2CO3 products, which need to be further purified and refined to remove impurity ions such as Na+, Cl-, Fe2+, Ca2+, Mg2+ to obtain battery-grade Li2CO. The purification methods of Li2CO3 include carbonization decomposition method, carbonization precipitation method, causticization method, electrolysis method, Li2CO3 recrystallization method, ion exchange method, etc. Compared with battery-grade lithium carbonate, industrial-grade lithium carbonate has high particle size requirements and more stringent impurity content requirements. However, due to the multi-level structure of lithium carbonate, the secondary crystallization phenomenon mainly based on agglomeration is serious, which greatly affects the product performance. In the conventional preparation process, there are obvious problems such as large product particle size, uneven particle size distribution, and poor sedimentation performance. It is difficult to directly prepare battery-grade lithium carbonate. For this reason, we propose a gas-liquid-liquid reactor for preparing battery-grade lithium carbonate. Summary of the invention

[0004] The object of the present invention is to provide a gas-liquid-liquid reactor for preparing battery-grade lithium carbonate to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a gas-liquid-liquid reactor for preparing battery-grade lithium carbonate, comprising a tank body, a driving mechanism is installed on the top of the tank body, and a motor frame is fixedly connected to the top of the motor frame, a driving motor is fixedly connected to the output shaft of the driving motor is fixedly connected to a driving rod, a plurality of turntables are fixedly connected to the array on the driving rod, a first hollow casing is fixedly connected to the upper part of the interior of the tank body, the driving rod is movably sleeved inside the first hollow casing, and a first flow stabilizer is fixedly connected to the bottom of the first hollow casing.

[0006] In this embodiment, a plurality of partitions are fixedly connected to the internal array of the tank body, through holes are opened on the plurality of partitions, the driving rod movably passes through the interior of the plurality of partitions, and the plurality of partitions are adjacently staggered with the plurality of turntables.

[0007] In this embodiment, a second flow stabilizer and a third flow stabilizer are fixedly connected to the lower part of the interior of the tank body, a second hollow sleeve is fixedly connected between the second flow stabilizer and the third flow stabilizer, and the other end of the driving rod is movably sleeved inside the second hollow sleeve.

[0008] In this embodiment, a gas phase outlet and a first heavy phase circulation port are respectively opened on the upper side of the tank body, the gas phase outlet is fixedly connected to the first gas phase pipe, and the first heavy phase circulation port is fixedly connected to the first heavy phase circulation pipe.

[0009] In this embodiment, a light phase outlet and a heavy phase inlet are respectively opened on the other side above the tank body, the light phase outlet is fixedly connected to a first light phase tube, the heavy phase inlet is fixedly connected to a first heavy phase tube, and a plurality of observation ports are arrayed on one side of the tank body, and observation tubes are respectively fixedly connected to the plurality of observation ports.

[0010] In this embodiment, a light phase inlet and a gas phase inlet are respectively opened on the lower side of the tank body, and a second light phase pipe is fixedly connected to the light phase inlet. A porous coil is fixedly connected to the lower interior of the tank body, and one end of the porous coil movably passes through the gas phase inlet. A second heavy phase circulation port is opened on one side of the bottom of the tank body, and a second heavy phase circulation pipe is fixedly connected to the second heavy phase circulation port. A heavy phase outlet is opened on the other side of the bottom of the tank body, and a second heavy phase pipe is fixedly connected to the heavy phase outlet.

[0011] Compared with the prior art, the present invention provides a gas-liquid-liquid reactor for preparing battery-grade lithium carbonate. The device can not only break up the bubbles in the gas bubbling upward from the bottom of the tank body by the rotation of the turntable to increase the reaction efficiency with the liquid, but also observe the gas-liquid-liquid reaction of battery-grade lithium carbonate through multiple observation ports, and can also control the flow rate of different liquids through multiple partitions, and inject different liquids through the heavy phase inlet, light phase inlet, light phase outlet and heavy phase outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 A schematic diagram of the overall top-down stereoscopic structure provided by an embodiment of the present invention;

[0014] Figure 2 A schematic diagram of the overall bottom-up stereoscopic structure provided by an embodiment of the present invention;

[0015] Figure 3 A schematic diagram of a three-dimensional structure of a partial cross-section of a tank body provided by an embodiment of the present invention;

[0016] Figure 4 A schematic diagram of a three-dimensional structure of a partial cross-section of a tank body provided by an embodiment of the present invention when viewed from above;

[0017] Figure 5 A schematic top view of a three-dimensional structure of a first flow stabilizer and a first hollow sleeve provided in an embodiment of the present invention;

[0018] Figure 6A schematic top view of a three-dimensional structure of a porous coil provided in an embodiment of the present invention;

[0019] Figure 7 A schematic top view of a three-dimensional structure of a drive motor, a drive rod, a turntable and a partition provided in an embodiment of the present invention;

[0020] Figure 8 A bottom-up stereoscopic structural schematic diagram of a second flow stabilizer and a second hollow sleeve provided in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Tank body; 2. Third flow stabilizer; 3. Motor frame; 4. Driving motor; 5. Driving rod; 6. Turntable; 7. First hollow casing; 8. First flow stabilizer; 9. Partition; 10. Multi-hole coil; 11. Second light phase tube; 12. Observation tube; 13. First gas phase tube; 14. First light phase tube; 15. First heavy phase tube; 16. First heavy phase circulation tube; 17. Second heavy phase circulation tube; 18. Second heavy phase tube; 19. Second hollow casing; 20. Second flow stabilizer. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Example 1: Please refer to Figure 1-8 A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate includes a tank body 1, a driving mechanism is installed on the top of the tank body 1, and a motor frame 3 is fixedly connected to the top of the motor frame 3. A driving motor 4 is fixedly connected to the output shaft of the driving motor 4, and a plurality of turntables 6 are fixedly connected to the array on the driving rod 5. A first hollow sleeve 7 is fixedly connected to the upper part of the interior of the tank body 1, and the driving rod 5 is movably sleeved inside the first hollow sleeve 7. A first flow stabilizer 8 is fixedly connected to the bottom of the first hollow sleeve 7.

[0025] In this embodiment, a plurality of partitions 9 are fixedly connected in an array inside the tank body 1, through holes are opened on the plurality of partitions 9, and the driving rod 5 movably passes through the interior of the plurality of partitions 9, and the plurality of partitions 9 and the plurality of turntables 6 are adjacently staggered.

[0026] In this embodiment, the second flow stabilizer 20 and the third flow stabilizer 2 are fixedly connected to the lower part of the interior of the tank body 1, and a second hollow sleeve 19 is fixedly connected between the second flow stabilizer 20 and the third flow stabilizer 2. The other end of the driving rod 5 is movably sleeved inside the second hollow sleeve 19.

[0027] In this embodiment, a gas phase outlet and a first heavy phase circulation port are respectively opened on one side above the tank body 1, the gas phase outlet is fixedly connected to a first gas phase pipe 13, and the first heavy phase circulation port is fixedly connected to a first heavy phase circulation pipe 16.

[0028] In this embodiment, a light phase outlet and a heavy phase inlet are respectively opened on the other side above the tank body 1, the light phase outlet is fixedly connected to a first light phase tube 14, and the heavy phase inlet is fixedly connected to a first heavy phase tube 15. A plurality of observation ports are opened in an array on one side of the tank body 1, and observation tubes 12 are respectively fixedly connected to the plurality of observation ports.

[0029] In this embodiment, a light phase inlet and a gas phase inlet are respectively opened on one side of the lower part of the tank body 1, and a second light phase pipe 11 is fixedly connected to the light phase inlet. A porous coil 10 is fixedly connected to the lower part of the interior of the tank body 1, and one end of the porous coil 10 movably passes through the gas phase inlet. A second heavy phase circulation port is opened on one side of the bottom of the tank body 1, and a second heavy phase circulation pipe 17 is fixedly connected to the second heavy phase circulation port. A heavy phase outlet is opened on the other side of the bottom of the tank body 1, and a second heavy phase pipe 18 is fixedly connected to the heavy phase outlet.

[0030] Working principle: When in use, the driving motor 4 is started to drive the driving rod 5 to rotate, and the rotation of the driving rod 5 drives multiple turntables 6 to rotate synchronously. The rotation of the turntable 6 is used to break up the bubbles in the gas bubbling upward from below, thereby increasing the reaction efficiency with the liquid.

[0031] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate, comprising a tank body (1), characterized in that: A driving mechanism is installed on the top of the tank body (1), and is fixedly connected to a motor frame (3); a driving motor (4) is fixedly connected to the top of the motor frame (3); a driving rod (5) is fixedly connected to the output shaft of the driving motor (4); a plurality of rotating disks (6) are fixedly connected in an array on the driving rod (5); a first hollow sleeve (7) is fixedly connected to the top of the interior of the tank body (1); the driving rod (5) is movably sleeved inside the first hollow sleeve (7); and a first flow stabilizer (8) is fixedly connected to the bottom of the first hollow sleeve (7).

2. A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A plurality of partitions (9) are fixedly connected in an array inside the tank body (1), and through holes are provided on the plurality of partitions (9). The driving rod (5) movably passes through the interior of the plurality of partitions (9), and the plurality of partitions (9) are adjacently staggered with the plurality of rotating disks (6).

3. A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A second flow stabilizer (20) and a third flow stabilizer (2) are respectively fixedly connected at the lower part of the interior of the tank body (1); a second hollow sleeve (19) is fixedly connected between the second flow stabilizer (20) and the third flow stabilizer (2); and the other end of the driving rod (5) is movably sleeved inside the second hollow sleeve (19).

4. A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A gas phase outlet and a first heavy phase circulation port are respectively provided on one side of the upper portion of the tank body (1); a first gas phase pipe (13) is fixedly connected to the gas phase outlet, and a first heavy phase circulation pipe (16) is fixedly connected to the first heavy phase circulation port.

5. A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A light phase outlet and a heavy phase inlet are respectively provided on the other upper side of the tank body (1), the light phase outlet is fixedly connected to a first light phase pipe (14), the heavy phase inlet is fixedly connected to a first heavy phase pipe (15), and a plurality of observation ports are arranged in an array on one side of the tank body (1), and the plurality of observation ports are respectively fixedly connected to observation pipes (12).

6. A gas-liquid-liquid reactor for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A light phase inlet and a gas phase inlet are respectively provided on one side of the lower part of the tank body (1), and a second light phase pipe (11) is fixedly connected to the light phase inlet. A porous coil (10) is fixedly connected to the lower part of the interior of the tank body (1), and one end of the porous coil (10) movably passes through the gas phase inlet. A second heavy phase circulation port is provided on one side of the bottom of the tank body (1), and a second heavy phase circulation pipe (17) is fixedly connected to the second heavy phase circulation port. A heavy phase outlet is provided on the other side of the bottom of the tank body (1), and a second heavy phase pipe (18) is fixedly connected to the heavy phase outlet.

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