Processing equipment for sodium ion battery hard carbon negative electrode material
Patent Information
- Application Number
- CN202522171239.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-10-14
AI Technical Summary
[0003]在钠离子电池硬碳负极材料的烟煤酸浸加工中，当前主流设备多为批次式反应釜，使用时得反复走进料、酸浸、停机排料、清洗的循环流程，没法连续作业；酸浸后要分离烟煤颗粒和酸液，大多靠静置沉淀或离心分离，但烟煤经超微粉碎后颗粒很细，容易跟着酸液流失；且排料时，这些细颗粒还常把控制排料的阀门通道堵住，得频繁拆开阀门清理，才能恢复设备运行
[0014] The beneficial effects of this utility model are as follows: The overflow plate forms a fixed liquid level boundary in the acid leaching tank, ensuring that the acid leaching time of the bituminous coal particles in the tank is consistent, avoiding insufficient reaction of some particles and excessive acid leaching of others due to liquid level fluctuations; The receiving hopper receives the overflowing mixture of bituminous coal particles and acid, and the inclined design allows the material to slide down naturally, which, together with the filter screen, achieves continuous solid-liquid separation of coal particle interception and acid permeation, avoiding material loss; The presence of the filter screen also prevents coal particles from entering the drain pipe and causing blockage, ensuring unobstructed acid recovery channels; The hydraulic rod drives the sealing plate to slide along the receiving hopper, which can flexibly control the start and stop of discharge; The bottom end of the sealing plate contacts the inner wall of the receiving hopper to avoid acid waste; The two guide plates are symmetrical about the overflow plate and are inclined, which can evenly guide the mixture of bituminous coal particles and acid in the acid leaching tank to the vicinity of the overflow plate, avoiding local accumulation of material in the tank; The drain pipe connects the acid leaching tank and the bottom of the filter screen, which can directly recover the filtered acid to the acid circulation system, while reducing the wastewater treatment pressure.
Smart Images
Figure CN224724133U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a processing equipment, specifically a processing equipment for hard carbon anode materials for sodium-ion batteries, belonging to the field of processing technology for hard carbon anode materials for sodium-ion batteries. Background Technology
[0002] In the field of sodium-ion batteries, hard carbon has become the mainstream anode material due to its core advantages such as adaptable interlayer spacing and high sodium storage capacity. Bituminous coal, with its high carbon content and easily modulated carbon structure into amorphous hard carbon through subsequent processes, is an ideal precursor for the large-scale preparation of hard carbon anodes. However, bituminous coal naturally contains ash and sulfur. If these impurities remain, they will damage the sodium storage channels of hard carbon and trigger side reactions during battery charging and discharging. Therefore, it is necessary to remove them through acid leaching pretreatment with 1-2M hydrochloric acid to control the final ash and sulfur content of hard carbon and ensure its sodium storage performance and cycle stability.
[0003] In the acid leaching process of bituminous coal for hard carbon anode materials in sodium-ion batteries, the current mainstream equipment is mostly batch reactors. During use, the process involves repeated feeding, acid leaching, shutdown for discharge, and cleaning, making continuous operation impossible. After acid leaching, the bituminous coal particles and acid solution need to be separated, which is mostly done by static sedimentation or centrifugation. However, after being ultra-finely pulverized, the bituminous coal particles are very fine and easily lost with the acid solution. Moreover, during discharge, these fine particles often block the valve channels that control the discharge, requiring frequent disassembly and cleaning of the valves to restore equipment operation. Utility Model Content
[0004] The purpose of this invention is to provide a processing device for hard carbon anode material of sodium-ion batteries in order to solve the above problems. The receiving hopper receives overflow material, the filter screen intercepts bituminous coal particles and separates acid in real time, and the hydraulic rod drives the sealing plate to slide, so that the discharge can be started and stopped at any time. The sealing plate fits with the receiving hopper to prevent acid leakage.
[0005] This utility model achieves the above-mentioned objective through the following technical solution: a processing equipment for hard carbon anode material of sodium-ion batteries, comprising an acid leaching tank, an overflow plate fixedly installed inside the acid leaching tank, a filter mechanism connected to the part of the acid leaching tank near the overflow plate, the filter mechanism comprising a receiving hopper and a sealing plate, the receiving hopper fixedly installed to the part of the acid leaching tank near the overflow plate, a filter screen fixedly installed on the receiving hopper, a guide plate and a hydraulic rod fixedly installed to the part of the acid leaching tank near the receiving hopper, an installation block fixedly connected to the telescopic end of the hydraulic rod, a sealing plate fixedly installed on the installation block, the sealing plate being slidably connected to the receiving hopper, and a drain pipe connected to the part of the acid leaching tank near the filter screen.
[0006] Preferably, the two guide plates are symmetrically arranged about the overflow plate, the guide plates are arranged with an inclined structure, and the top of the overflow plate is arranged with a sawtooth structure.
[0007] Preferably, both the receiving hopper and the filter screen are arranged with an inclined structure, and the receiving hopper is connected to the interior of the acid leaching tank through the filter screen.
[0008] Preferably, the bottom end of the sealing plate contacts the inner wall of the receiving hopper, and the width of the sealing plate is smaller than the width of the receiving hopper.
[0009] Preferably, a connecting mechanism is installed inside the acid leaching tank. The connecting mechanism includes a hot water circulation pipe and a liquid inlet pipe. The liquid inlet pipe is fixedly installed on the acid leaching tank. Two hot water circulation pipes are symmetrically fixed on the acid leaching tank. A heat preservation cavity is provided in the part of the acid leaching tank near the hot water circulation pipe.
[0010] Preferably, the hot water circulation pipe is connected to the insulation cavity, and the liquid inlet pipe is connected to the interior of the acid leaching tank.
[0011] Preferably, a stirring mechanism is rotatably installed at the part between the acid leaching tank and the overflow plate. The stirring mechanism includes a rotating frame and scrapers. Several scrapers are rotatably installed at the part between the acid leaching tank and the overflow plate. A motor is fixedly installed on the acid leaching tank. The output end of the motor is fixedly connected to a rotating shaft through a coupling. A sleeve rod is fixedly installed on the rotating shaft. Several rotating frames and stirring rods are fixedly installed at equal intervals on the sleeve rod. The rotating frames are fixedly connected to the scrapers.
[0012] Preferably, the sleeve rod and the rotating shaft are rotatably connected to the acid leaching tank and the overflow plate, and the end of the stirring rod is spherically shaped.
[0013] Preferably, a stirring rod is provided between two adjacent rotating frames, and the end of the scraper is set with an inclined structure.
[0014] The beneficial effects of this utility model are as follows: The overflow plate forms a fixed liquid level boundary in the acid leaching tank, ensuring that the acid leaching time of the bituminous coal particles in the tank is consistent, avoiding insufficient reaction of some particles and excessive acid leaching of others due to liquid level fluctuations; The receiving hopper receives the overflowing mixture of bituminous coal particles and acid, and the inclined design allows the material to slide down naturally, which, together with the filter screen, achieves continuous solid-liquid separation of coal particle interception and acid permeation, avoiding material loss; The presence of the filter screen also prevents coal particles from entering the drain pipe and causing blockage, ensuring unobstructed acid recovery channels; The hydraulic rod drives the sealing plate to slide along the receiving hopper, which can flexibly control the start and stop of discharge; The bottom end of the sealing plate contacts the inner wall of the receiving hopper to avoid acid waste; The two guide plates are symmetrical about the overflow plate and are inclined, which can evenly guide the mixture of bituminous coal particles and acid in the acid leaching tank to the vicinity of the overflow plate, avoiding local accumulation of material in the tank; The drain pipe connects the acid leaching tank and the bottom of the filter screen, which can directly recover the filtered acid to the acid circulation system, while reducing the wastewater treatment pressure. Attached Figure Description
[0015] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the acid leaching tank and the guide plate of this utility model; Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A. Figure 4 This is a schematic diagram of the connection structure between the scraper and the overflow plate of this utility model; Figure 5 This is a schematic diagram of the connection structure between the acid leaching tank and the heat preservation cavity of this utility model. Figure 6 This is a schematic diagram of the connection structure between the receiving hopper and the sealing plate of this utility model; Figure 7 This is a schematic diagram of the connection structure between the acid leaching tank and the drain pipe of this utility model.
[0016] In the diagram: 1. Acid leaching tank; 2. Stirring mechanism; 201. Motor; 202. Rotating frame; 203. Scraper; 204. Sleeve rod; 205. Stirring rod; 206. Rotating shaft; 3. Connecting mechanism; 301. Hot water circulation pipe; 302. Liquid inlet pipe; 303. Insulation chamber; 4. Overflow plate; 5. Filtration mechanism; 501. Guide plate; 502. Receiving hopper; 503. Filter screen; 504. Hydraulic rod; 505. Sealing plate; 506. Mounting block; 507. Drain pipe. Detailed Implementation
[0017] 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.
[0018] Please see Figures 1-7As shown, a processing device for hard carbon anode material for sodium-ion batteries includes an acid leaching tank 1. An overflow plate 4 is fixedly installed inside the acid leaching tank 1. A filter mechanism 5 is connected to the part of the acid leaching tank 1 near the overflow plate 4. The filter mechanism 5 includes a receiving hopper 502 and a sealing plate 505. The receiving hopper 502 is fixedly installed in the part of the acid leaching tank 1 near the overflow plate 4. A filter screen 503 is fixedly installed on the receiving hopper 502. A guide plate 5 is fixedly installed in the part of the acid leaching tank 1 near the receiving hopper 502. 01 and hydraulic rod 504, with a mounting block 506 fixedly connected to the telescopic end of hydraulic rod 504. A sealing plate 505 is fixedly installed on mounting block 506, and the sealing plate 505 is slidably connected to receiving hopper 502. When the mixture slides down the inclined surface of receiving hopper 502, the filter screen 503 fixed inside receiving hopper 502 intercepts bituminous coal particles, while the acid flows through the filter screen 503 to the drain pipe 507 at the bottom of acid leaching tank 1. If it is necessary to pause the discharge, hydraulic rod 504 is restarted. The sealing plate 505 is pushed upward to block the channel of the receiving hopper 502; the part of the acid leaching tank 1 near the filter screen 503 is connected to the drain pipe 507, and the two guide plates 501 are symmetrically arranged about the overflow plate 4. The guide plates 501 are arranged with an inclined structure. After the bituminous coal particles have reached the standard for acid leaching, a small amount of acid solution is added slowly to raise the liquid level in the acid leaching tank 1 above the top of the overflow plate 4. The mixture of bituminous coal particles and acid solution overflows naturally along the overflow plate 4. The part of the acid leaching tank 1 near the overflow plate 4 is solidified. A guide plate 501 is provided, and the inclined structure of the guide plate 501 accurately guides the overflow mixture into the receiving hopper 502 to avoid material splashing or deviation; the top of the overflow plate 4 is set with a sawtooth structure, and both the receiving hopper 502 and the filter screen 503 are set with an inclined structure. The receiving hopper 502 is connected to the interior of the acid leaching tank 1 through the filter screen 503. The bottom end of the sealing plate 505 contacts the inner wall of the receiving hopper 502, and the width of the sealing plate 505 is smaller than the width of the receiving hopper 502.
[0019] As a technical optimization of this utility model, a connecting mechanism 3 is installed inside the acid leaching tank 1. The connecting mechanism 3 includes a hot water circulation pipe 301 and a liquid inlet pipe 302. The liquid inlet pipe 302 is fixedly installed on the acid leaching tank 1, and two hot water circulation pipes 301 are symmetrically fixed on the acid leaching tank 1. Hot water is introduced into the hot water circulation pipe 301 and enters the heat preservation cavity 303 provided inside the acid leaching tank 1. The temperature inside the acid leaching tank 1 is kept stable through circulation, which facilitates the acid leaching reaction rate and avoids hydrochloric acid volatilization. The heat preservation cavity 303 is provided near the hot water circulation pipe 301 of the acid leaching tank 1. The hot water circulation pipe 301 is connected to the heat preservation cavity 303, and the liquid inlet pipe 302 is connected to the inside of the acid leaching tank 1.
[0020] As a technical optimization of this utility model, a stirring mechanism 2 is rotatably installed in the middle of the acid leaching tank 1 and the overflow plate 4. The stirring mechanism 2 includes a rotating frame 202 and scrapers 203. Several scrapers 203 are rotatably installed in the middle of the acid leaching tank 1 and the overflow plate 4. A motor 201 is fixedly installed on the acid leaching tank 1. The output end of the motor 201 is fixedly connected to a rotating shaft 206 through a coupling. A sleeve rod 204 is fixedly installed on the rotating shaft 206. Several rotating frames 202 and stirring rods 205 are fixedly installed at equal intervals on the sleeve rod 204. The rotating frames 202 and the scrapers 203 are fixedly connected. The sleeve rod 204... The rotating shaft 206 is rotatably connected to the acid leaching tank 1 and the overflow plate 4. The output end of the motor 201 drives the rotating shaft 206 to rotate through the coupling, which in turn drives the sleeve rod 204, the rotating frame 202 fixed on the side wall, and the stirring rod 205 to rotate. The stirring rod 205 breaks up the bituminous coal particles to prevent agglomeration and ensure that the particles are in full contact with the acid solution. The rotating frame 202 drives the scraper 203 fixed at the end to scrape the bottom of the acid leaching tank 1 and the side wall of the overflow plate 4 to prevent the bituminous coal particles from accumulating. The end of the stirring rod 205 is spherical, and there is a stirring rod 205 between two adjacent rotating frames 202. The end of the scraper 203 is inclined.
[0021] In use, this invention first injects hydrochloric acid solution into the acid leaching tank 1 through the inlet pipe 302, with the injection amount ensuring the liquid surface does not touch the top of the overflow plate 4. Then, hot water is introduced into the hot water circulation pipe 301, entering the heat preservation chamber 303 located inside the acid leaching tank 1. Circulation maintains a stable temperature within the acid leaching tank 1, thus ensuring the acid leaching reaction rate and preventing hydrochloric acid evaporation. The hydraulic rod 504 fixed on the acid leaching tank 1 is activated, its extension end driving the mounting block 506 to push the sealing plate 505 along the inner wall of the receiving hopper 502 to the closed position, preventing leakage during subsequent material addition. Finally, ultra-finely pulverized bituminous coal particles are added to the acid leaching tank 1, the amount of which... The liquid level is controlled at 5-10cm from the top of the overflow plate 4; then, the switch of the motor 201 fixed on the acid leaching tank 1 is turned on. The output end of the motor 201 drives the rotating shaft 206 to rotate through the coupling, which in turn drives the sleeve rod 204, the rotating frame 202 fixed on the side wall, and the stirring rod 205 to rotate. The stirring rod 205 breaks up the bituminous coal particles to prevent agglomeration and ensure that the particles are in full contact with the acid liquid. The rotating frame 202 drives the scraper 203 fixed at the end to scrape the bottom of the acid leaching tank 1 and the side wall of the overflow plate 4 to prevent the bituminous coal particles from accumulating; then, hot water is continuously replenished through the hot water circulation pipe 301, and the heat preservation chamber 303 ensures that the acid leaching reaction proceeds stably; when the bituminous coal particles are acid leached... After reaching the target level, continue to slowly add a small amount of acid solution until the liquid level in the acid leaching tank 1 rises above the top of the overflow plate 4. The mixture of bituminous coal particles and acid solution overflows naturally along the overflow plate 4. A guide plate 501 is fixed near the overflow plate 4 in the acid leaching tank 1. The inclined structure of the guide plate 501 accurately guides the overflowing mixture into the receiving hopper 502, preventing material splashing or deviation. As the mixture slides down the inclined surface of the receiving hopper 502, the filter screen 503 fixed in the receiving hopper 502 intercepts the bituminous coal particles, while the acid solution flows through the filter screen 503 to the drain pipe 507 at the bottom of the acid leaching tank 1. If it is necessary to pause the discharge, restart the hydraulic rod 504 to push the sealing plate 505 upward. Block the channel of receiving hopper 502; during normal discharge, the sealing plate 505 remains open to ensure smooth material flow; open the drain pipe 507 valve to transport the acid solution that has passed through the filter screen 503 to the acid solution circulation system. After concentration calibration, it can be reused for acid leaching through the inlet pipe 302. The wet bituminous coal particles intercepted in the receiving hopper 502 slide along the inclined surface of the receiving hopper 502 into the plate and frame filter press for dehydration and washing, ultimately becoming hard carbon precursors; after the acid leaching batch is completed, turn off the motor 201 and the hot water circulation pipe 301, and inject clean water through the inlet pipe 302 to rinse the acid leaching tank 1. The scraper 203 rotates synchronously to assist in cleaning, and the wastewater is discharged through the drain pipe 507 for treatment.
[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A processing apparatus for hard carbon anode material for sodium-ion batteries, comprising an acid leaching tank (1), characterized in that: An overflow plate (4) is fixedly installed inside the acid leaching tank (1). A filter mechanism (5) is connected to the part of the acid leaching tank (1) near the overflow plate (4). The filter mechanism (5) includes a receiving hopper (502) and a sealing plate (505). A receiving hopper (502) is fixedly installed to the part of the acid leaching tank (1) near the overflow plate (4). A filter screen (503) is fixedly installed on the receiving hopper (502). A guide plate (501) and a hydraulic rod (504) are fixedly installed to the part of the acid leaching tank (1) near the receiving hopper (502). An installation block (506) is fixedly connected to the telescopic end of the hydraulic rod (504). A sealing plate (505) is fixedly installed on the installation block (506). The sealing plate (505) is slidably connected to the receiving hopper (502). A drain pipe (507) is connected to the part of the acid leaching tank (1) near the filter screen (503).
2. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 1, characterized in that: The two guide plates (501) are symmetrically arranged about the overflow plate (4), the guide plates (501) are arranged with a sloping structure, and the top of the overflow plate (4) is arranged with a sawtooth structure.
3. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 1, characterized in that: The receiving hopper (502) and the filter screen (503) are both arranged with an inclined structure. The receiving hopper (502) is connected to the interior of the acid leaching tank (1) through the filter screen (503).
4. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 1, characterized in that: The bottom end of the sealing plate (505) contacts the inner wall of the receiving hopper (502), and the width of the sealing plate (505) is smaller than the width of the receiving hopper (502).
5. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 1, characterized in that: The acid leaching tank (1) is equipped with a connecting mechanism (3), which includes a hot water circulation pipe (301) and an inlet pipe (302). The inlet pipe (302) is fixedly installed on the acid leaching tank (1), and two hot water circulation pipes (301) are symmetrically fixed on the acid leaching tank (1). The acid leaching tank (1) is provided with a heat preservation cavity (303) near the hot water circulation pipe (301).
6. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 5, characterized in that: The hot water circulation pipe (301) is connected to the heat preservation cavity (303), and the liquid inlet pipe (302) is connected to the interior of the acid leaching tank (1).
7. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 1, characterized in that: A stirring mechanism (2) is rotatably installed in the middle of the acid leaching tank (1) and the overflow plate (4). The stirring mechanism (2) includes a rotating frame (202) and a scraper (203). Several scrapers (203) are rotatably installed in the middle of the acid leaching tank (1) and the overflow plate (4). A motor (201) is fixedly installed on the acid leaching tank (1). The output end of the motor (201) is fixedly connected to a rotating shaft (206) through a coupling. A sleeve rod (204) is fixedly installed on the rotating shaft (206). Several rotating frames (202) and stirring rods (205) are fixedly installed at equal intervals on the sleeve rod (204). The rotating frames (202) and the scrapers (203) are fixedly connected.
8. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 7, characterized in that: The sleeve rod (204) and the rotating shaft (206) are rotatably connected to the acid leaching tank (1) and the overflow plate (4), and the end of the stirring rod (205) is set with a spherical structure.
9. The processing equipment for a sodium-ion battery hard carbon anode material according to claim 7, characterized in that: A stirring rod (205) is provided between two adjacent rotating frames (202), and the end of the scraper (203) is set with a bevel structure.