Compact ternary positive electrode material precursor drying system
By dividing the drying equipment into a waiting area, a drying area, and a cooling area, and adopting a gradient heating design, the problems of long drying time and heat waste in existing equipment are solved, and efficient and energy-saving drying of ternary cathode material precursors is achieved.
Patent Information
- Application Number
- CN202520226275.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Existing drying equipment suffers from problems such as prolonged drying time, significant heat waste, and poor drying effect during the drying process of ternary cathode material precursors, especially continuous drying equipment which performs poorly under high temperature differences.
A compact ternary cathode material precursor drying system is adopted, which divides the equipment into a waiting area, a drying area and a cooling area. Gradient heating and drying are achieved through the design of lifting gates and connecting pipes. The heat gradient is used to achieve reasonable heating and avoid uneven drying and surface hardening under a single high temperature.
It improves drying efficiency, saves energy, avoids heat waste, achieves more efficient drying results, and at the same time ensures the quality of materials.
Smart Images
Figure CN223623318U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ternary precursor drying and processing technology, and more specifically, to a compact ternary cathode material precursor drying system. Background Technology
[0002] The precursor for ternary cathode materials is an important intermediate in the preparation of ternary cathode materials. It is usually a compound synthesized by a co-precipitation reaction of a salt solution of three metal elements: nickel (Ni), cobalt (Co), and manganese (Mn). During the preparation of the precursor by co-precipitation reaction, the product usually carries a large amount of water. If this water is not removed, it will adversely affect subsequent processes such as sintering and the performance of the final material.
[0003] Current drying equipment requires the drying chamber to cool down before and after drying ternary cathode material precursors to avoid high temperatures affecting operators. This not only prolongs the drying operation time but also requires reheating, resulting in significant heat waste and increased drying costs. Furthermore, some continuous drying equipment has a large temperature difference due to increased feed temperature, leading to poor drying effect on ternary cathode material precursors. Utility Model Content
[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a compact ternary cathode material precursor drying system to solve the above-mentioned background technical problems.
[0005] To achieve the above objectives, the present invention adopts the following technical solution;
[0006] A compact ternary cathode material precursor drying system includes a conveyor line and an oven. The conveyor line is mounted on the front of the oven. Four gate mounting seats are integrally formed on the top of the oven, and lifting gates are installed on the inner sides of each of the four gate mounting seats. The interior of the oven is divided into a waiting area, a drying area, and a cooling area by the four lifting gates. An air inlet cooling port is provided on the back of the oven. A channel is provided on the lifting gate between the drying area and the cooling area, and the two ends of the channel are connected to the air inlet cooling port and the cooling area, respectively. A connecting pipe is fixedly installed inside the oven, and the two ends of the connecting pipe are connected to the waiting area and the cooling area, respectively. An exhaust pipe is fixedly installed on the lifting gate on the right side of the waiting area, and a solenoid valve and a ventilation fan are fixedly installed on the exhaust pipe. A temperature sensor is fixedly installed inside the waiting area.
[0007] As a further description of the above technical solution:
[0008] The channel has an L-shaped side view cross-section, and the connection between the channel and the cooling zone is located at the bottom of the cooling zone.
[0009] As a further description of the above technical solution:
[0010] The middle part of the connecting pipe is inserted into the interior of the drying zone, and the connecting pipe is a metal pipe.
[0011] As a further description of the above technical solution:
[0012] The connection point between the connecting pipe and the cooling zone is located at the top of the cooling zone, and the connection point between the connecting pipe and the waiting zone is located at the top of the waiting zone.
[0013] As a further description of the above technical solution:
[0014] The connection between the exhaust pipe and the waiting area is located at the bottom of the waiting area.
[0015] Compared with existing technologies, the advantages of this utility model are:
[0016] This solution divides the equipment into a preheating section and a heating section, and uses a reasonable gradient heating method to dry the material, avoiding problems such as uneven drying and surface hardening that may occur under a single high temperature. This improves the overall drying efficiency and makes full use of heat, making it more energy-efficient and environmentally friendly. Attached Figure Description
[0017] Figure 1 This is a top view of the structure of this utility model;
[0018] Figure 2 This is a front sectional view of the oven of this utility model;
[0019] Figure 3 This is a side sectional view of the cooling zone of this utility model.
[0020] Figure 4 This utility model Figure 2 A magnified structural diagram of part A in the middle.
[0021] Explanation of the labels in the diagram:
[0022] 1. Conveyor line; 2. Oven; 21. Waiting area; 22. Drying area; 23. Cooling area; 24. Air inlet / cooling port; 3. Gate mounting base; 4. Lifting gate; 5. Channel; 6. Connecting pipe; 7. Exhaust pipe; 8. Solenoid valve; 9. Temperature sensor; 10. Ventilation fan. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;
[0024] Please see Figure 1-4In this utility model, a compact ternary cathode material precursor drying system includes a conveyor line 1 and an oven 2. The conveyor line 1 is mounted on the front of the oven 2. Four gate mounting seats 3 are integrally formed on the top of the oven 2. Lifting gates 4 are installed on the inner side of each of the four gate mounting seats 3. The interior of the oven 2 is divided into a waiting area 21, a drying area 22, and a cooling area 23 by the four lifting gates 4. An air inlet cooling port 24 is provided on the back of the oven 2. A channel 5 is provided on the lifting gate 4 between the drying area 22 and the cooling area 23. The two ends of the channel 5 are respectively connected to the air inlet cooling port 24 and the cooling area 23. A connecting pipe 6 is fixedly installed on the inside of the oven 2. The two ends of the connecting pipe 6 are respectively connected to the waiting area 21 and the cooling area 23. An exhaust pipe 7 is fixedly installed on the lifting gate 4 on the right side of the waiting area 21. A solenoid valve 8 and a ventilation fan 10 are fixedly installed on the exhaust pipe 7. A temperature sensor 9 is fixedly installed inside the waiting area 21.
[0025] In this invention, four gate mounting seats 3 are provided, and the opening, closing, and connection states of the waiting area 21, drying area 22, and cooling area 23 of the oven 2 are controlled respectively. During feeding and discharging, the two gate mounting seats 3 on both sides are opened. After feeding and discharging are completed, the two sides are closed. After the ternary cathode material precursor in the drying area 22 is dried, the two middle gate mounting seats 3 are opened to transport the ternary cathode material precursor in the waiting area 21 to the drying area 22. The dried portion in the drying area 22 is transferred to the cooling area 23, and then the gate mounting seats 3 are closed. During the cooling process, the gate mounting seats 3 between the drying area 22 and the cooling area 23 are in a closed state. At this time, the channel 5 is connected to the air inlet cooling port 24, and external air can enter the cooling area 23 through the air inlet cooling port 24 and the channel 5 to cool the dried ternary cathode material precursor. The air intake is affected by the diameter of channel 5, which will not cause the ternary cathode material precursor to cool down suddenly. The hot air in the cooling zone 23 is introduced into the waiting zone 21 through the connecting pipe 6 to increase the temperature of the waiting zone 21, which facilitates the preheating of the ternary cathode material precursor in the waiting zone 21. According to the temperature sensor 9, the temperature in the waiting zone 21 is detected. When the temperature is too low, the solenoid valve 8 and the ventilation fan 10 are opened to exhaust the low-temperature air and receive the high-temperature air introduced from the cooling zone 23 to maintain the preheating function. The waiting zone 21 and the drying zone 22 have a stepped temperature increase, which divides the equipment into a preheating section and a heating section. The material to be dried is dried in a reasonable gradient temperature increase, avoiding problems such as uneven drying and surface hardening that may occur under a single high temperature. This improves the overall drying efficiency and makes full use of heat, which is more energy-saving and environmentally friendly.
[0026] Please see Figure 2 and Figure 3 The side view cross-section of channel 5 is L-shaped, and the connection between channel 5 and cooling zone 23 is located at the bottom of cooling zone 23.
[0027] In this invention, when the lifting gate 4 between the drying zone 22 and the cooling zone 23 is opened, the two ends of the channel 5 are misaligned with the cooling zone 23 and the air inlet cooling port 24, respectively. When closed, the three are connected, and the connection between the channel 5 and the cooling zone 23 can utilize thermal expansion and contraction to allow the cold air to gradually distribute and dissipate from bottom to top, facilitating gas flow and cooling of the ternary cathode material precursor.
[0028] Please see Figure 2 The middle part of the connecting pipe 6 is inserted into the interior of the drying zone 22, and the connecting pipe 6 is a metal pipe.
[0029] In this invention, the connecting pipe 6 located in the drying zone 22 can exchange heat with the high temperature in the drying zone 22, further heating the gas passing through the connecting pipe 6 to ensure the residual heat temperature requirement of the waiting zone 21.
[0030] Please see Figure 2 Wherein: the connection point between the connecting pipe 6 and the cooling zone 23 is located at the top of the cooling zone 23, and the connection point between the connecting pipe 6 and the waiting zone 21 is located at the top of the waiting zone 21.
[0031] In this invention, thermal expansion and contraction are utilized to allow preheated air to circulate from top to bottom, preventing hot air from being directly discharged through the exhaust pipe 7.
[0032] Please see Figure 2 and Figure 4 Wherein: the connection between the exhaust pipe 7 and the waiting area 21 is located at the bottom of the waiting area 21.
[0033] In this invention, it is ensured that the air discharged through the exhaust pipe 7 is air with a lower temperature.
[0034] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.
Claims
1. A compact ternary cathode material precursor drying system, comprising a conveyor line (1) and an oven (2), wherein the conveyor line (1) is mounted on the front of the oven (2), characterized in that: The top of the oven (2) is integrally formed with four gate mounting seats (3), and each of the four gate mounting seats (3) is equipped with a lifting gate (4). The interior of the oven (2) is divided into a waiting area (21), a drying area (22) and a cooling area (23) by the four lifting gates (4). An air inlet cooling port (24) is provided on the back of the oven (2). A channel (5) is provided on the lifting gate (4) between the drying area (22) and the cooling area (23). The two ends of the channel (5) are connected to the air intake cooling port (24) and the cooling zone (23) respectively. A connecting pipe (6) is fixedly installed inside the oven (2). The two ends of the connecting pipe (6) are connected to the waiting area (21) and the cooling zone (23) respectively. An exhaust pipe (7) is fixedly installed on the lifting gate (4) on the right side of the waiting area (21). A solenoid valve (8) and a ventilation fan (10) are fixedly installed on the exhaust pipe (7). A temperature sensor (9) is fixedly installed inside the waiting area (21).
2. The compact ternary cathode material precursor drying system according to claim 1, characterized in that: The side view cross-section of the channel (5) is L-shaped, and the connection between the channel (5) and the cooling zone (23) is located at the bottom of the cooling zone (23).
3. The compact ternary cathode material precursor drying system according to claim 1, characterized in that: The middle part of the connecting pipe (6) is inserted into the interior of the drying zone (22), and the connecting pipe (6) is a metal pipe.
4. The compact ternary cathode material precursor drying system according to claim 1, characterized in that: The connection point between the connecting pipe (6) and the cooling zone (23) is located at the top of the cooling zone (23), and the connection point between the connecting pipe (6) and the waiting zone (21) is located at the top of the waiting zone (21).
5. A compact ternary cathode material precursor drying system according to claim 1, characterized in that: The connection between the exhaust pipe (7) and the waiting area (21) is located at the bottom of the waiting area (21).