Lithium ion battery negative electrode material carbonization furnace

Abstract

The utility model relates to the technical field of graphitization furnaces, and discloses a lithium ion battery cathode material carbonization furnace which comprises a combustion chamber, the top of the combustion chamber is fixedly connected with a smoke conveying pipe, the bottom of the smoke conveying pipe is fixedly connected with a heat exchange mechanism, and the left side of the heat exchange mechanism is fixedly connected with a heat exchange pipe. The top of the heat exchange pipe is fixedly connected with a high-temperature carbonization furnace, the top of the high-temperature carbonization furnace is fixedly connected with a flue gas return pipe, and the bottom of the flue gas return pipe is fixedly connected with a spraying mechanism. According to the utility model, fuel is put into the combustion chamber for combustion, generated heat and dense smoke flow into the smoke distribution block through the smoke conveying pipe, then hot air and dense smoke are distributed in the smoke distribution block, and then the heat and dense smoke flow into the plurality of heat exchange pipes; air sucked by the fan at the heat exchange pipe and then flowing into the heat exchange block through the fresh air conveying pipe is subjected to heat exchange, and therefore the temperature of the sucked air is increased.

Description

Technical Field

[0001] This utility model relates to the field of graphitization furnace technology, and in particular to a carbonization furnace for lithium-ion battery anode materials. Background Technology

[0002] Lithium-ion batteries are rechargeable batteries widely used in electronic products and electric vehicles. Their working principle is based on the reciprocating movement of lithium ions between the positive and negative electrodes. The negative electrode material of lithium-ion batteries is usually graphite or other carbon-based materials because they have good conductivity, stability and high energy density. In order to improve the performance of the negative electrode material, graphite needs to be treated at high temperature in a carbonization furnace to make its structure more stable and its porosity appropriate, thereby enhancing the ability of lithium ions to insert and extract, extending the cycle life of the battery and improving its overall performance.

[0003] The working principle of a carbonization furnace for lithium-ion battery anode materials is to heat carbon-based raw materials at high temperatures to induce a pyrolysis reaction, transforming them into carbon materials with stable structures and high specific surface areas. The carbonization furnace typically operates in an oxygen-free or low-oxygen environment to avoid oxidation reactions and ensure the purity and performance of the carbon materials. During the high-temperature processing, volatile components in the raw materials are removed, and the structure of the carbon-based materials is optimized, improving their conductivity, porosity, and lithium-ion intercalation capacity, thus providing efficient anode materials for lithium-ion batteries.

[0004] In existing technologies, some lithium-ion battery anode material carbonization furnaces typically lack efficient heat exchange systems, leading to wasted high-temperature heat flow, reduced energy utilization, and failure to fully utilize the heat energy generated within the carbonization furnace. This increases both energy consumption and operating costs. Meanwhile, the carbonization furnace generates a large amount of harmful fumes during operation. If left untreated, these fumes will be directly emitted, harming the environment and human health. Therefore, a lithium-ion battery anode material carbonization furnace is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a carbonization furnace for lithium-ion battery anode materials, aiming to improve the problem that some existing lithium-ion battery anode material carbonization furnaces often lack an efficient heat exchange system, resulting in the waste of high-temperature heat flow and reduced energy utilization.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a carbonization furnace for lithium-ion battery negative electrode materials, including a combustion chamber, a flue gas pipe fixedly connected to the top of the combustion chamber, a heat exchange mechanism fixedly connected to the bottom of the flue gas pipe, a heat exchange pipe fixedly connected to the left side of the heat exchange mechanism, a high-temperature carbonization furnace fixedly connected to the top of the heat exchange pipe, a flue gas return pipe fixedly connected to the top of the high-temperature carbonization furnace, a spraying mechanism fixedly connected to the bottom of the flue gas return pipe, and a locking mechanism fixedly connected to the outside of the high-temperature carbonization furnace.

[0007] The heat exchange mechanism includes a smoke distribution block, which is fixedly connected to the bottom of the smoke conveying pipe. A heat exchange block is fixedly connected to the bottom of the smoke distribution block. A heat exchange groove is opened inside the heat exchange block. A heat exchange tube is fixedly connected inside the heat exchange groove. The heat exchange tube is fixedly connected to the bottom of the smoke distribution block. A smoke collection block is fixedly connected to the bottom of the heat exchange tube. A fresh air intake mechanism is fixedly connected to the right side of the heat exchange tube. A fresh air return pipe is fixedly connected to the bottom of the heat exchange block. The heat exchange tube is fixedly connected to the top of the smoke collection block.

[0008] As a further description of the above technical solution: the spraying mechanism includes a filter block, a filter assembly is fixedly connected inside the filter block, a water tank is fixedly connected to the rear side of the filter block, a water supply pipe is fixedly connected to the right side of the water tank, a spray nozzle is fixedly connected to the top of the water supply pipe, and the spray nozzle is fixedly connected inside the filter block.

[0009] As a further description of the above technical solution: the fresh air intake mechanism includes a fresh air delivery pipe, which is fixedly connected to the right side of the heat exchange block. A fan is fixedly connected inside the fresh air delivery pipe, and a vent is opened inside the heat exchange block. The fresh air delivery pipe corresponds to the vent.

[0010] As a further description of the above technical solution: the filter assembly includes a filter block one, the filter block one is fixedly connected inside the filter block, the filter block two is fixedly connected inside the filter block, the filter block one is fixedly connected to the top of the filter block two, an activated carbon tank is fixedly connected inside the filter block, a through hole is opened at the bottom of the activated carbon tank, and an activated carbon block is fixedly connected inside the activated carbon tank.

[0011] As a further description of the above technical solution: the locking mechanism includes a sealing block, which is slidably connected inside the high-temperature carbonization furnace. Four locking blocks are fixed on both sides of the outside of the flue gas return pipe, with the four locking blocks in pairs. A rotating adjustment block is fixedly connected to the outside of the sealing block, and the rotating adjustment block is rotatably connected to the adjacent side of the locking block. A locking block is fixedly connected to the outside of the sealing block, and the locking block is slidably connected to the adjacent side of two of the locking blocks. A locking shaft is slidably connected inside the locking block.

[0012] As a further description of the above technical solution: a heat-absorbing baffle is fixedly connected inside the high-temperature carbonization furnace, the high-temperature carbonization furnace and the heat-absorbing baffle form a heating tank, the flue gas return pipe is fixedly connected inside the heating tank, and the heat exchange pipe is fixedly connected inside the heating tank;

[0013] As a further description of the above technical solution: the bottom of the filter block is provided with an air outlet groove, and the interior of the air outlet groove is provided with multiple air outlet baffles;

[0014] As a further description of the above technical solution: four support blocks are fixedly connected to both sides of the high-temperature carbonization furnace, and the four support blocks are fixedly connected to the four corners of the bottom of the high-temperature carbonization furnace.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, fuel is placed in a combustion chamber for combustion. The heat and smoke generated flow to a smoke distribution block through a smoke conveying pipe. The smoke distribution block then separates the hot air and smoke, which then flow to multiple heat exchange tubes. At the heat exchange tubes, air drawn in by a fan and then flowing into the heat exchange block through a fresh air supply pipe undergoes heat exchange, thereby increasing the temperature of the drawn-in air. The exchanged air then flows into the combustion chamber through a fresh air return pipe, thereby improving combustion efficiency and fuel utilization.

[0017] 2. In this utility model, after the heat and smoke have exchanged heat, they flow into the cavity of the high-temperature carbonization furnace through the heat exchange pipe, thereby heating the material inside the high-temperature carbonization furnace and completing the carbonization process. Then, the smoke in the cavity of the high-temperature carbonization furnace flows into the filter block through the flue gas return pipe. The water in the water tank flows to the spray nozzle through the water supply pipe to spray the smoke. Then, the smoke adsorbs harmful substances through the cooperation of filter block one and filter block two. Finally, after being filtered by the activated carbon block, it is discharged from the gas outlet baffle. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the carbonization furnace for the lithium-ion battery negative electrode material proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the filter block in the carbonization furnace for lithium-ion battery negative electrode material proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the water storage tank in the carbonization furnace for lithium-ion battery anode materials proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the heat-absorbing partition of the carbonization furnace for lithium-ion battery negative electrode material proposed in this utility model.

[0022] Legend:

[0023] 1. Combustion chamber; 2. Smoke conveying pipe; 3. Smoke distribution block; 4. Heat exchange block; 5. Fresh air supply pipe; 6. Fan; 7. Fresh air return pipe; 8. Heat exchange pipe; 9. Smoke distribution block; 10. Heat exchange pipe; 11. High-temperature carbonization furnace; 12. Rotation adjustment block; 13. Locking block; 14. Locking shaft; 15. Sealing block; 16. Flue gas return pipe; 17. Filter block; 18. Exhaust baffle; 19. Filter block one; 20. Filter block two; 21. Activated carbon block; 22. Activated carbon tank; 23. Water storage tank; 24. Water supply pipe; 25. Spray nozzle; 26. Heat absorption baffle; 27. Support block. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1 , Figure 2 , Figure 4This utility model provides an embodiment of a lithium-ion battery anode material carbonization furnace, including a combustion chamber 1. The combustion chamber 1 is one of the core components of the lithium-ion battery anode material carbonization furnace. The combustion chamber 1 is used to generate a high-temperature environment, causing the battery anode material to undergo a carbonization reaction under high-temperature conditions. A smoke conveying pipe 2 is fixedly connected to the top of the combustion chamber 1. The smoke conveying pipe 2 is responsible for exhausting the heat waves and hot smoke generated in the combustion chamber, ensuring effective control of temperature and airflow. A heat exchange mechanism is fixedly connected to the bottom of the smoke conveying pipe 2. The heat exchange mechanism is responsible for recovering heat from the high-temperature flue gas and... The heat exchange mechanism avoids energy waste by exchanging heat and using the heat to heat the newly flowing air. The heated air is then returned to combustion chamber 1, thus avoiding the energy consumption of combustion chamber 1 in heating the air. The airflow also accelerates fuel combustion. A heat exchange pipe 10 is fixedly connected to the left side of the heat exchange mechanism, serving as a conveyor to transfer heat and smoke to the high-temperature carbonization furnace, thereby completing the carbonization process. A high-temperature carbonization furnace 11 is fixedly connected to the top of the heat exchange pipe 10. The high-temperature carbonization furnace 11 is the main equipment in the carbonization process, providing a high-temperature environment for the lithium-ion battery negative electrode material. The material undergoes carbonization treatment. A heat-absorbing baffle 26 is fixedly connected inside the high-temperature carbonization furnace 11. The heat-absorbing baffle 26 evenly distributes the heat within the high-temperature furnace and forms a heat exchange zone, ensuring uniform carbonization of the negative electrode material. The high-temperature carbonization furnace 11 and the heat-absorbing baffle 26 form a heating tank. A flue gas return pipe 16 and a heat exchange pipe 10 are fixedly connected inside the heating tank. A flue gas return pipe 16 is fixedly connected to the top of the high-temperature carbonization furnace 11 for recovering flue gas, preventing leakage and direct emission, thus avoiding environmental pollution. Pollution, a spray mechanism is fixedly connected to the bottom of the flue gas return pipe 16. The spray mechanism is responsible for treating harmful substances in the exhaust gas to ensure that the emitted gas meets environmental standards. A locking mechanism is fixedly connected to the outside of the high-temperature carbonization furnace 11. The locking mechanism is used to fix and seal the block 15 to ensure the sealing and stability inside the high-temperature carbonization furnace. It also ensures the stability of the internal pressure and temperature of the high-temperature carbonization furnace and avoids leakage or instability under high-temperature conditions. Four support blocks 27 are fixedly connected to both sides of the high-temperature carbonization furnace 11. The four support blocks 27 are fixedly connected to the four corners of the bottom of the high-temperature carbonization furnace 11.

[0026] The locking mechanism includes a sealing block 15, which is slidably connected inside the high-temperature carbonization furnace 11, serving a sealing and regulating function to ensure the airtightness of the furnace environment. Four locking blocks are fixed to both sides of the flue gas return pipe 16, arranged in pairs. A rotating adjusting block 12 is fixedly connected to the outside of the sealing block 15, used to adjust the position of the sealing block 15, ensuring that the pressure and temperature inside the furnace are maintained within an appropriate range, and also guiding the rotation of the sealing block 15. When opening the high-temperature spring furnace, to avoid damage to the sealing block 15 due to incorrect rotation, the rotation adjustment block 12 is rotatably connected to the side of the locking block. The sealing block 15 is fixedly connected to the outside of the locking block 15. The locking block 13 is slidably connected to the outside of the sealing block 15 to fix the position of the sealing block 15 and ensure its firmness and reliability. The locking block 13 is slidably connected to the side of the two locking blocks. The locking shaft 14 is slidably connected inside the locking block 13. The locking shaft 14 is connected to the locking block 13 to ensure the fixing function of the locking block 13.

[0027] The heat exchange mechanism includes a smoke distribution block 3, which is used to divert the flue gas discharged from the combustion chamber 1, allowing the flue gas to enter the heat exchange block 4 evenly. The smoke distribution block 3 is fixedly connected to the bottom of the flue gas pipe 2, and the heat exchange block 4 is fixedly connected to the bottom of the smoke distribution block 3. The heat exchange block 4 has multiple heat exchange tubes 8 inside, through which heat exchange occurs with newly introduced air. The heat exchange block 4 has an exchange groove inside, and the heat exchange tubes 8 are fixedly connected inside the heat exchange groove. The heat exchange tubes 8 are the core component of the heat exchange mechanism. By allowing the flue gas to come into contact with the newly introduced air inside the heat exchange tubes 8, heat is effectively transferred to the air. The heat exchange pipe 8 is fixedly connected to the bottom of the smoke block 3. The bottom of the heat exchange pipe 8 is fixedly connected to the smoke block 9, which merges the split smoke. The right side of the heat exchange pipe 8 is fixedly connected to the fresh air intake mechanism, which ensures that the system can continuously draw in fresh air, promote heat exchange, and maintain stable airflow. The bottom of the heat exchange block 4 is fixedly connected to the fresh air return pipe 7, which is responsible for guiding the air after heat exchange with the flue gas into the combustion chamber 1, thereby improving the fuel utilization rate in the combustion chamber 1. At the same time, the exchanged air saves the energy consumed in heating the air. The heat exchange pipe 10 is fixedly connected to the top of the smoke block 9.

[0028] The fresh air intake mechanism includes a fresh air delivery pipe 5, which serves as a channel for extracting external air and assists in guiding air into the heat exchange block 4. The fresh air delivery pipe 5 is fixedly connected to the right side of the heat exchange block 4. A fan 6 is fixedly connected inside the fresh air delivery pipe 5. The fan 6 is driven by a motor and draws external air into the fresh air delivery pipe 5 by rotating. Ventilation holes are provided inside the heat exchange block 4, and the fresh air delivery pipe 5 corresponds to the ventilation holes.

[0029] Reference Figure 1 , Figure 3 The spraying mechanism includes a filter block 17, which contains a filter assembly that can effectively filter suspended solids in the exhaust gas, reducing the pollution of the exhaust gas to the external environment. An air outlet slot is provided at the bottom of the filter block 17, and multiple air outlet baffles 18 are provided inside the air outlet slot to prevent external impurities from entering the filter assembly. The filter assembly is fixedly connected inside the filter block 17 to filter the exhaust gas, thereby reducing the pollution of the exhaust gas to the environment. A water storage device is fixedly connected to the rear side of the filter block 17. The water tank 23 stores water for spraying, ensuring the continuous operation of the spraying system. A water supply pipe 24 is fixedly connected to the right side of the water tank 23 as a conveying component to deliver water to the spray nozzle 25, ensuring the water supply. The top of the water supply pipe 24 is fixedly connected to the spray nozzle 25, which is installed inside the filter block 17 and is responsible for spraying the water in the water tank 23 into the exhaust gas flow for purification. The spray nozzle 25 is fixedly connected inside the filter block 17.

[0030] The filter assembly includes a filter block 19, which is fixedly connected inside the filter block 17. A filter block 20 is fixedly connected inside the filter block 17. The filter blocks 1 and 20 work together to filter the exhaust gas, thereby reducing the content of harmful components in the exhaust gas. The filter block 19 is fixedly connected to the top of the filter block 20. An activated carbon tank 22 is fixedly connected inside the filter block 17 to provide a place for the activated carbon block 21. At the same time, the through holes at the bottom of the activated carbon tank 22 ensure the flow of spray water. The activated carbon tank 22 has through holes at the bottom and activated carbon blocks 21 are fixedly connected inside the activated carbon tank 22. The activated carbon blocks 21 adsorb harmful components in the exhaust gas, thereby reducing the impact of the exhaust gas.

[0031] Working principle: The fuel is ignited inside the combustion chamber 1. The high-temperature smoke generated by the combustion flows to the smoke distribution block 3 through the smoke supply pipe 2. Inside the smoke distribution block 3, the high-temperature smoke is divided. The divided high-temperature smoke exchanges heat with the fresh air drawn in by the fan 6 inside the fresh air supply pipe 5 through the heat exchange pipe 8 located inside the heat exchange block 4. The exchanged smoke merges inside the smoke block 9 and then flows to the interior of the high-temperature carbonization furnace 11 through the heat exchange pipe 10. Specifically, it flows into the cavity formed by the heat absorption baffle 26 and the inner wall of the high-temperature carbonization furnace 11. The air after heat exchange flows back to the interior of the combustion chamber 1 through the fresh air return pipe 7, thereby improving the combustion efficiency of the fuel inside the combustion chamber 1, thereby improving the fuel utilization rate and reducing energy waste.

[0032] To open the internal sealing block 15 of the high-temperature carbonization furnace 11, specifically, pull out the locking shaft 14 to release the restriction of the locking block 13, and then, with the help of the rotating adjusting block 12, drive the sealing block 15 to rotate, thereby opening the cavity inside the heat-absorbing baffle 26, and then place the material in the cavity.

[0033] The heat contained in the high-temperature smoke flowing into the cavity is absorbed by the heat-absorbing baffle 26, thereby carbonizing the negative electrode material inside the high-temperature carbonization furnace 11. The smoke with absorbed heat flows to the filter block 17 through the flue gas return pipe 16. Then, the water in the water tank 23 located behind the filter block 17 is transported through the water supply pipe 24 and flows to the spray nozzle 25. The water is sprayed out through the spray nozzle 25 to complete the spraying of the smoke, thereby reducing the harmful substances in the smoke. Then, the air is filtered by the double layer of filter block 19 and filter block 20, and the activated carbon block 21 inside the activated carbon tank 22, which greatly reduces the harmful substances in the smoke. Then, the filtered smoke is directly discharged to the outside through the exhaust baffle 18.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A carbonization furnace for lithium-ion battery negative electrode materials, comprising a combustion chamber (1), characterized in that: The combustion chamber (1) is fixedly connected to the top of a flue pipe (2), the bottom of the flue pipe (2) is fixedly connected to a heat exchange mechanism, the left side of the heat exchange mechanism is fixedly connected to a heat exchange pipe (10), the top of the heat exchange pipe (10) is fixedly connected to a high-temperature carbonization furnace (11), the top of the high-temperature carbonization furnace (11) is fixedly connected to a flue gas return pipe (16), the bottom of the flue gas return pipe (16) is fixedly connected to a spraying mechanism, and the outside of the high-temperature carbonization furnace (11) is fixedly connected to a locking mechanism. The heat exchange mechanism includes a smoke distribution block (3), which is fixedly connected to the bottom of the smoke supply pipe (2). A heat exchange block (4) is fixedly connected to the bottom of the smoke distribution block (3). An exchange groove is opened inside the heat exchange block (4). A heat exchange pipe (8) is fixedly connected inside the exchange groove. The heat exchange pipe (8) is fixedly connected to the bottom of the smoke distribution block (3). A smoke and gas block (9) is fixedly connected to the bottom of the heat exchange pipe (8). A fresh air intake mechanism is fixedly connected to the right side of the heat exchange pipe (8). A fresh air return pipe (7) is fixedly connected to the bottom of the heat exchange block (4). A heat exchange pipe (10) is fixedly connected to the top of the smoke and gas block (9).

2. The lithium-ion battery negative electrode material carbonization furnace according to claim 1, characterized in that: The spraying mechanism includes a filter block (17), a filter assembly is fixedly connected inside the filter block (17), a water tank (23) is fixedly connected to the rear side of the filter block (17), a water supply pipe (24) is fixedly connected to the right side of the water tank (23), a spray nozzle (25) is fixedly connected to the top of the water supply pipe (24), and the spray nozzle (25) is fixedly connected inside the filter block (17).

3. The lithium-ion battery negative electrode material carbonization furnace according to claim 1, characterized in that: The fresh air intake mechanism includes a fresh air delivery pipe (5), which is fixedly connected to the right side of the heat exchange block (4). A fan (6) is fixedly connected inside the fresh air delivery pipe (5). A ventilation hole is opened inside the heat exchange block (4), and the fresh air delivery pipe (5) corresponds to the ventilation hole.

4. The lithium-ion battery negative electrode material carbonization furnace according to claim 2, characterized in that: The filter assembly includes a filter block one (19), which is fixedly connected inside the filter block (17). A filter block two (20) is fixedly connected inside the filter block (17). The filter block one (19) is fixedly connected to the top of the filter block two (20). An activated carbon tank (22) is fixedly connected inside the filter block (17). A through hole is opened at the bottom of the activated carbon tank (22). An activated carbon block (21) is fixedly connected inside the activated carbon tank (22).

5. The lithium-ion battery negative electrode material carbonization furnace according to claim 1, characterized in that: The locking mechanism includes a sealing block (15), which is slidably connected inside the high-temperature carbonization furnace (11). Four locking blocks are fixed on both sides of the flue gas return pipe (16), and the four locking blocks are in pairs. A rotating adjustment block (12) is fixedly connected to the outside of the sealing block (15), and the rotating adjustment block (12) is rotatably connected to the adjacent side of the locking block. A locking block (13) is fixedly connected to the outside of the sealing block (15), and the locking block (13) is slidably connected to the adjacent side of the two locking blocks. A locking shaft (14) is slidably connected inside the locking block (13).

6. The lithium-ion battery negative electrode material carbonization furnace according to claim 1, characterized in that: The high-temperature carbonization furnace (11) is internally fixedly connected to a heat-absorbing baffle (26), and the high-temperature carbonization furnace (11) and the heat-absorbing baffle (26) form a heating tank. The flue gas return pipe (16) is fixedly connected in the heating tank, and the heat exchange pipe (10) is fixedly connected in the heating tank.

7. The lithium-ion battery anode material carbonization furnace according to claim 2, characterized in that: The bottom of the filter block (17) is provided with an air outlet groove, and multiple air outlet baffles (18) are provided inside the air outlet groove.

8. The lithium-ion battery negative electrode material carbonization furnace according to claim 1, characterized in that: Four support blocks (27) are fixedly connected to both sides of the high-temperature carbonization furnace (11), and the four support blocks (27) are fixedly connected to the four corners of the bottom of the high-temperature carbonization furnace (11).

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