Battery electrolyte evaporation kettle

Abstract

This utility model discloses a battery electrolyte evaporation vessel, which includes an evaporation chamber and a cover. A stirring scraper is provided at the bottom of the evaporation chamber, which can stir the electrolyte, enhance the heating effect, and scrape off residues when their viscosity increases during the later stages of evaporation, preventing the formation of a coking layer and ensuring good heat transfer at the bottom of the evaporation chamber. The upper and lower fixing blocks are secured with screws for easy disassembly and cleaning of the evaporation chamber and cover. The sliding fit between the sealing block and the sealing groove ensures a tight seal during fixing. When the gas pressure inside the evaporation chamber exceeds a set safety value, a pressure sensor detects this and the solenoid valve opens. Because the gas pressure in the pressure relief box is lower than that in the evaporation chamber, gas flows to the pressure relief box, reducing the gas pressure inside the evaporation chamber and ensuring the safety of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery electrolyte evaporation kettle. Background Technology

[0002] In the lithium battery recycling process, especially after dismantling, crushing, and sorting, a large amount of waste electrolyte is generated. The main components of the electrolyte are volatile organic solvents (such as carbonates) and solutes (such as lithium salts like LiPF6). Its treatment serves two main purposes: to recover high-purity solvents for resource recycling; and to safely and harmlessly dispose of it, facilitating subsequent extraction of valuable metals (lithium, cobalt, nickel, etc.) from the battery. The evaporation reactor is the core equipment for this separation process.

[0003] During the later stages of electrolyte evaporation, the viscosity of the residue increases, and the organic matter within it may decompose, polymerize, and carbonize at the heating point, easily creating dead zones near the bottom and forming a thick coking layer. This coking layer acts like an "insulation layer," significantly reducing heat transfer efficiency, leading to increased energy consumption, prolonged evaporation time, and the need for frequent kettle cleaning, thus impacting continuous production and capacity. Utility Model Content

[0004] The purpose of this invention is to provide a battery electrolyte evaporation kettle, which solves the problem that in the later stage of electrolyte evaporation, the viscosity of the residue increases, a dead zone is easily formed near the bottom, a thick coking layer is easily formed, which reduces heat transfer efficiency and production efficiency.

[0005] To achieve the above objectives, a battery electrolyte evaporation reactor is provided, comprising: an evaporation chamber and a cover; a sealing block is fixedly connected to the upper end of the evaporation chamber; a sealing groove is provided at the lower end of the cover; the outer wall of the sealing block and the inner wall of the sealing groove are slidably connected; a lower fixing block is fixedly connected to the upper outer wall of the evaporation chamber; an upper fixing block is fixedly connected to the lower outer wall of the cover; the lower fixing block and the upper fixing block are fixedly connected by screw threads; a motor is fixedly connected to the middle of the outer bottom of the evaporation chamber; a stirring scraper is fixedly connected to the output end of the motor; and a rotating frame is fixedly connected to the left and right inner walls of the evaporation chamber; the middle of the rotating frame is rotatably connected to the upper outer wall of the stirring scraper shaft. The evaporator is connected to a pressure relief box in the middle of the right wall. A solenoid valve is installed at the connection between the evaporator and the pressure relief box. A through hole three is opened on the front wall of the pressure relief box, and a vacuum machine two is connected to the through hole three.

[0006] According to the aforementioned battery electrolyte evaporation kettle, handles are fixedly connected to the left and right outer walls of the upper end of the lid.

[0007] According to the battery electrolyte evaporation kettle, a liquid collection tank is fixedly connected to the lower inner wall of the tank cover, and an outflow through hole is opened on the right wall of the liquid collection tank.

[0008] According to the aforementioned battery electrolyte evaporation vessel, a temperature sensor and a pressure sensor are fixedly connected to the right inner wall of the evaporation chamber, respectively, in front of and behind the solenoid valve.

[0009] According to the aforementioned battery electrolyte evaporation vessel, a control panel is fixedly connected to the front outer wall of the evaporation tank, and a display screen is provided on the upper outer surface of the control panel.

[0010] According to the battery electrolyte evaporation vessel, a through hole is provided on the upper part of the left front side wall of the evaporation tank, and the through hole is connected to a vacuum machine.

[0011] According to the aforementioned battery electrolyte evaporation vessel, a second through hole is provided on the lower part of the left front side wall of the evaporation tank, and the second through hole is connected to a liquid suction pump.

[0012] According to the battery electrolyte evaporation vessel, a sealing gasket is fixedly connected to the inner wall of the sealing groove, the bottom wall of the evaporation tank is hemispherical and flat in the middle, and a heating coil is provided in the inner layer of the bottom wall of the evaporation tank to heat and evaporate the electrolyte.

[0013] The above-mentioned solution has the following beneficial effects: 1. The bottom of the evaporator is equipped with a stirring scraper, which can not only stir the electrolyte to enhance the heating effect, but also scrape off the residue when the viscosity of the residue increases in the later stage of evaporation, thus avoiding the formation of a coking layer and ensuring the heat transfer effect at the bottom of the evaporator. The upper and lower fixing blocks are fixed with screws, which facilitates the disassembly and cleaning of the evaporator and the cover. The sliding fit between the sealing block and the sealing groove ensures the sealing performance when fixed. 2. When the air pressure inside the evaporator exceeds the set safety value, the air pressure sensor will detect it and the solenoid valve will open. Since the air pressure inside the pressure relief box is lower than that inside the evaporator, the gas will flow to the pressure relief box, reducing the air pressure inside the evaporator and ensuring the safety of the equipment.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a perspective view of a battery electrolyte evaporation vessel according to the present invention; Figure 2 This is a perspective view of the evaporation chamber in a battery electrolyte evaporation kettle according to the present invention; Figure 3 This is a perspective view of the inner tank cover of a battery electrolyte evaporation kettle according to the present invention; Figure 4 This is a perspective view of a liquid collection tank in a battery electrolyte evaporation kettle according to the present invention.

[0016] Legend: 1. Evaporator; 101. Sealing block; 102. Lower fixing block; 103. Rotating frame; 104. Control panel; 105. Display screen; 106. Through hole one; 107. Through hole two; 2. Cover; 201. Sealing groove; 202. Upper fixing block; 203. Liquid collection tank; 204. Outflow through hole; 205. Handle; 3. Pressure relief box; 301. Through hole three; 4. Motor; 401. Stirring scraper; 5. Solenoid valve; 6. Pressure sensor; 7. Temperature sensor; 8. Vacuum machine one; 9. Liquid suction pump; 10. Vacuum machine two. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1-3 This utility model discloses a battery electrolyte evaporation kettle, comprising: an evaporation chamber 1 and a chamber cover 2. A sealing block 101 is fixedly connected to the upper end of the evaporation chamber 1, and a sealing groove 201 is formed at the lower end of the chamber cover 2. The outer wall of the sealing block 101 and the inner wall of the sealing groove 201 are slidably connected to ensure the airtightness of the environment inside the chamber and ensure safety during operation. A lower fixing block 102 is fixedly connected to the upper outer wall of the evaporation chamber 1, and an upper fixing block 202 is fixedly connected to the lower outer wall of the chamber cover 2. The lower fixing block 102 and the upper fixing block 202 are connected by screws. The screw connection allows the cover 2 to be installed and removed from the evaporator 1, facilitating cleaning and maintenance. A motor 4 is fixedly connected to the middle of the outer bottom of the evaporator 1 to control the rotation of the stirring scraper 401. The output end of the motor 4 is fixedly connected to the stirring scraper 401. A rotating frame 103 is fixedly connected to the left and right inner walls of the evaporator 1. The middle of the rotating frame 103 is rotatably connected to the upper outer wall of the rotating shaft of the stirring scraper 401 to ensure the stability of the stirring scraper 401 during rotation, avoid shaking, and ensure the effect of stirring the electrolyte and scraping off coke. A pressure relief box 3 is connected to the middle of the right wall of the evaporator 1 to prevent excessive gas pressure in the evaporator 1 from causing danger. A solenoid valve 5 is installed at the connection between the evaporator 1 and the pressure relief box 3. It works in conjunction with the gas pressure sensor 6 to operate when the gas pressure is too high, allowing the gas to flow to the pressure relief box 3 to achieve the pressure relief effect. A through hole 301 is opened on the front wall of the pressure relief box 3. The through hole 301 is connected to a vacuum machine 2 10. Before operation, the vacuum machine 2 10 is used to ensure that the gas pressure in the pressure relief box 3 is lower than the gas pressure in the evaporator 1, so as to achieve the pressure relief effect when the gas pressure is too high.

[0019] Reference Figure 2-4Handles 205 are fixedly connected to the upper left and right outer walls of the lid 2 for easy removal. A liquid collection tank 203 is fixedly connected to the lower inner wall of the lid 2. When the electrolyte evaporates into vapor due to heating, it condenses into liquid upon contact with the inner inclined wall of the lid 2 and flows along the inner inclined wall into the liquid collection tank 203. An outflow hole 204 is provided on the right wall of the liquid collection tank 203. Due to the fluidity of the liquid, the liquid in the liquid collection tank 203 will flow out from the outflow hole 204. The required container is installed at the outflow hole 204. After the container is installed, it is necessary to ensure that the liquid in the evaporator 1 is within the range of evaporation tank 1. The evaporator 1 is sealed to facilitate the collection of the evaporated liquid. Temperature sensor 7 and pressure sensor 6 are fixedly connected to the inner right wall of the evaporator 1, respectively, before and after the solenoid valve 5, to detect the temperature and pressure inside the evaporator 1 and ensure safety. A control panel 104 is fixedly connected to the outer front wall of the evaporator 1 to set the safety values ​​for temperature and pressure, and to control the operation of vacuum pump 8, liquid suction pump 9, vacuum pump 10, solenoid valve 5, motor 4, and the heating coil at the bottom of the evaporator 1. A display screen 105 is installed on the upper outer surface of the control panel 104 to display the temperature and pressure inside the evaporator 1. The information displays the operating status of vacuum pump 8, liquid suction pump 9, vacuum pump 2 10, solenoid valve 5, motor 4, and the heating coil at the bottom of evaporator 1. A through-hole 106 is provided on the upper left front side wall of evaporator 1, connecting to vacuum pump 8. This reduces the pressure inside evaporator 1. According to physical principles, the boiling point of a liquid decreases as the external pressure decreases. This allows electrolyte solvents such as dimethyl carbonate (DMC), diethyl carbonate (DEC), and ethylene carbonate (EC) to boil and evaporate at temperatures far below their atmospheric pressure boiling points, improving efficiency. Evaporation efficiency: A through hole 2 107 is provided on the lower part of the left front side wall of evaporator 1. The through hole 2 107 is connected to a liquid suction pump 9, which draws the electrolyte to be treated into evaporator 1, which is efficient and fast. A sealing gasket is fixedly connected to the inner wall of the sealing groove 201 to ensure the airtightness of evaporator 1. The bottom wall of evaporator 1 is hemispherical and flat in the middle, which increases the heating area of ​​the electrolyte and improves the heating efficiency. A heating coil is set in the inner layer of the bottom wall of evaporator 1 to heat and evaporate the electrolyte. Cooling equipment can be installed on the outer sloping wall of the cover 2 to enhance the condensation effect and speed up production efficiency.

[0020] Working Principle: During preparation, the pressure inside the evaporator 1 is reduced using the vacuum pump 8 via the control panel 104. According to physical principles, the boiling point of a liquid decreases with decreasing external pressure, allowing the electrolyte solvent to boil and evaporate at a temperature far below its atmospheric pressure boiling point, thus improving evaporation efficiency. The vacuum pump 10 ensures that the pressure inside the pressure relief tank 3 is lower than that inside the evaporator 1, achieving a pressure relief effect when pressure is too high. The liquid suction pump 9 draws the electrolyte to be processed into the evaporator 1. The motor 4 operates, and the stirring scraper 401 rotates to stir the electrolyte, improving the heating effect. In the later stages of evaporation, it also removes easily coking residues, preventing the formation of a coking layer. The heating coil at the bottom of the evaporator 1 operates to heat the electrolyte. The electrolyte evaporates into steam when heated. When the steam comes into contact with the inner inclined wall of the cover 2, it condenses into liquid and flows along the inner inclined wall into the liquid collection tank 203. The liquid flows out from the outflow hole 204 and is collected. The temperature sensor 7 and the pressure sensor 6 constantly monitor relevant information inside the evaporator 1. When the pressure is too high, the solenoid valve 5 will open, allowing the gas to flow to the pressure relief tank 3, thus reducing the pressure and ensuring safety. The outer wall of the sealing block 101 and the inner wall of the sealing groove 201 slide together to ensure the airtightness of the environment inside the tank and ensure safety during operation. The lower fixing block 102 and the upper fixing block 202 are fixed by screw thread connection, which realizes the installation and removal of the cover 2 on the evaporator 1, which is convenient for cleaning, maintenance and other operations.

[0021] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A battery electrolyte evaporation vessel, comprising: An evaporator (1) and a lid (2) are characterized in that a sealing block (101) is fixedly connected to the upper end of the evaporator (1), a sealing groove (201) is opened at the lower end of the lid (2), the outer wall of the sealing block (101) and the inner wall of the sealing groove (201) are slidably connected, a lower fixing block (102) is fixedly connected to the upper outer wall of the evaporator (1), an upper fixing block (202) is fixedly connected to the lower outer wall of the lid (2), the lower fixing block (102) and the upper fixing block (202) are fixedly connected by screw threads, a motor (4) is fixedly connected to the middle of the outer bottom of the evaporator (1), a stirring scraper (401) is fixedly connected to the output end of the motor (4), and a rotating frame (103) is fixedly connected to the left and right inner walls of the evaporator (1), the middle of the rotating frame (103) is rotatably connected to the upper outer wall of the rotating shaft of the stirring scraper (401); The evaporator (1) has a pressure relief box (3) connected to the middle of the right wall. A solenoid valve (5) is provided at the connection between the evaporator (1) and the pressure relief box (3). A through hole three (301) is opened on the front wall of the pressure relief box (3). The through hole three (301) is connected to a vacuum machine two (10).

2. The battery electrolyte evaporation vessel according to claim 1, characterized in that, The top left and right outer walls of the box cover (2) are fixedly connected with handles (205).

3. The battery electrolyte evaporation vessel according to claim 1, characterized in that, The lower inner wall of the box cover (2) is fixedly connected to a liquid collection tank (203), and the right wall of the liquid collection tank (203) is provided with an outflow through hole (204).

4. The battery electrolyte evaporation vessel according to claim 1, characterized in that, The right inner wall of the evaporator (1) is fixedly connected to a temperature sensor (7) and a pressure sensor (6) in front of and behind the solenoid valve (5).

5. The battery electrolyte evaporation vessel according to claim 1, characterized in that, The evaporator (1) is fixedly connected to the front outer wall of the control panel (1), and the upper outer surface of the control panel (104) is provided with a display screen (105).

6. The battery electrolyte evaporation vessel according to claim 1, characterized in that, The evaporator (1) has a through hole (106) on the upper part of the left front side wall, and the through hole (106) is connected to a vacuum machine (8).

7. The battery electrolyte evaporation vessel according to claim 1, characterized in that, The evaporator (1) has a through hole 2 (107) on the lower part of the left front side wall, and the through hole 2 (107) is connected to a liquid suction pump (9).

8. The battery electrolyte evaporation vessel according to claim 1, characterized in that, A sealing gasket is fixedly connected to the inner wall of the sealing groove (201). The bottom wall of the evaporator (1) is hemispherical and flat in the middle. A heating coil is provided in the inner layer of the bottom wall of the evaporator (1) to heat and evaporate the electrolyte.

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