Lithium hexafluorophosphate synthesis tank

Abstract

The utility model relates to the field of chemical equipment, and particularly discloses a lithium hexafluorophosphate synthesis tank which is characterized by comprising an inner container, a motor is arranged at the upper end of the inner container, and the motor is in driving connection with a stirring device arranged in the inner container; a barrel is arranged on the outer side of the inner container, a jacket is arranged between the barrel and the inner container, and a flow guide plate is arranged in the jacket; a circulating device is arranged on one side of the cylinder body and is communicated with the jacket in a circulating manner; a shielding stirrer is arranged at the bottom of the barrel, and an air inlet and a discharge port are formed in one side of the shielding stirrer and are communicated with the inner container; one side of the motor is provided with a feed port and an exhaust port which are communicated with the inner container; the utility model aims to improve the production efficiency, the product quality and the safety and reduce the cost.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to a lithium hexafluorophosphate synthesis tank. Background Art

[0002] In today's era of rapid development of new energy industries, the market demand for lithium hexafluorophosphate, as a key electrolyte material for lithium-ion batteries, continues to rise. The synthesis process of lithium hexafluorophosphate is crucial, and the synthesis tank is the core equipment.

[0003] In the production of lithium hexafluorophosphate, lithium fluoride is first dissolved in high-purity anhydrous hydrogen fluoride to produce an anhydrous hydrogen fluoride solution containing lithium fluoride. This step places strict demands on the structure and performance of the synthesis tank. Traditional synthesis tanks can suffer from uneven stirring during the dissolution process. Improper tank shape and internal baffle placement can create dead zones where the solution cannot be effectively stirred. This prevents the lithium fluoride from dissolving fully and quickly in the anhydrous hydrogen fluoride, impacting production efficiency.

[0004] Next, phosphorus pentachloride is added to the solution to produce a saturated lithium hexafluorophosphate solution. This process requires a well-sealed synthesis tank to prevent the leakage of harmful gases produced during the reaction, which could cause environmental pollution and safety hazards. Currently, gas is added to the synthesis tank through the upper end of the cylinder during operation. During synthesis, the gas cannot fully mix with the solution, resulting in low reaction efficiency.

[0005] Existing synthesis tank jacket temperature control regulates the temperature of the material within the synthesis tank by circulating a heat medium or a refrigerant within the jacket. When the temperature needs to be increased, a heat medium, such as hot water or steam, is introduced into the jacket. The heat from the heat medium is transferred to the material within the synthesis tank through the jacket wall, raising the material temperature. When the temperature needs to be lowered, a refrigerant, such as cold water or chilled brine, is introduced into the jacket. The refrigerant absorbs the heat from the material within the synthesis tank, lowering the material temperature. Because heat needs to be transferred through the jacket wall, the jacket temperature control response speed is relatively slow, making it difficult to meet the needs of rapid temperature changes. To achieve effective temperature control, the heat medium or refrigerant must be continuously introduced into the jacket, which results in a certain amount of energy consumption. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the utility model provides a lithium hexafluorophosphate synthesis tank to improve the rapid return of the slide, thereby improving production efficiency, product quality, safety and reducing costs.

[0007] In order to solve the above problems, the technical solution adopted by the utility model is: a lithium hexafluorophosphate synthesis tank, characterized in that: it includes an inner tank, a motor is provided at the upper end of the inner tank, and the motor is driven and connected to a stirring device arranged inside the inner tank; a cylinder is provided on the outside of the inner tank, a jacket is provided between the cylinder and the inner tank, and a guide plate is provided in the jacket; a circulation device is provided on one side of the cylinder and is connected to the jacket circulation; a shielded agitator is provided at the bottom of the cylinder, and an air inlet and a discharge port are provided on one side of the shielded agitator and are connected to the inner tank; a feed port and an exhaust port are provided on one side of the motor and are connected to the inner tank.

[0008] The beneficial effects of this solution are as follows: the shielded agitator installed at the bottom further enhances the stirring effect on the material at the bottom of the tank, preventing material precipitation, so that the material in the entire inner tank can be in a good state of motion, ensuring the consistency of the reaction; the guide plate is installed in the jacket, and the circulation device on the side of the barrel can make the flow of the heat medium or coolant in the jacket more orderly and efficient, thereby improving the uniformity and speed of temperature transfer, thereby better meeting the demand for precise temperature control during the synthesis process. Whether heating or cooling, the set temperature can be reached more quickly, reducing the impact of temperature fluctuations on the reaction. The bottom air inlet is set so that the gas can enter the inner tank more evenly and mix with the solution, avoiding the local pressure unevenness and safety hazards that may be caused by adding gas from the top, and improving the stability and safety of the reaction.

[0009] Furthermore, the stirring device includes a stirring rod and a stirring blade, the stirring rod being fixedly connected to the stirring blade, and the stirring rod being fixedly connected to the output end of the motor by a snap-fit connection. The snap-fit connection enables quick installation and disassembly. When the stirring device needs to be assembled, the connection can be quickly completed by simply aligning and snapping the connecting end of the stirring rod with the snap on the output end of the motor, which greatly saves installation time and improves work efficiency. The snap design can withstand large torque and vibration during the stirring process, ensuring that the stirring rod and the output end of the motor will not loosen or slip, ensuring stable stirring operation, and thus improving the quality and effect of stirring.

[0010] Furthermore, the stirring blade is provided with a plurality of spoiler grooves and grooves arranged vertically on the stirring blade. The presence of the spoiler grooves and grooves can change the flow path of the fluid, causing the fluid to generate more turbulence and eddies during the stirring process, which helps to improve the mixing degree of the fluid, allowing substances of different components to more fully contact and react, thereby enhancing the stirring effect. The spoiler grooves and grooves increase the contact area between the stirring blade and the fluid, which is conducive to heat transfer. When a chemical reaction is carried out in the synthesis tank, it is usually accompanied by the release or absorption of heat. Good heat transfer efficiency can make the temperature more uniform, which is conducive to controlling the reaction process and improving the stability and safety of the reaction.

[0011] Furthermore, the spoiler groove is arranged at an angle. The inclined spoiler groove can make the fluid produce a more complex flow pattern during the stirring process. When the fluid passes through the inclined spoiler groove, its flow direction will change, forming a spiral or twisted flow path, thereby increasing the turbulence degree and mixing effect of the fluid. Moreover, since the fluid forms a complex flow under the guidance of the spoiler groove, the contact area and heat exchange time between the fluid and the stirring plate and the wall of the synthesis tank are increased, thereby improving the heat transfer efficiency.

[0012] Furthermore, the guide plate is a spiral guide plate, which is fitted with the inner liner and is a heat-conducting guide plate. The spiral guide plate can guide the heat medium or refrigerant in the jacket to flow in a spiral manner. This flow mode extends the flow path of the fluid in the jacket, increases the contact time and contact area between the fluid and the inner liner, thereby significantly improving the heat transfer efficiency. The heat-conducting guide plate can quickly transfer the heat of the fluid in the jacket to the inner liner or absorb heat from the inner liner, reducing the resistance to heat transfer and making the heat transfer process more efficient. The spiral guide plate causes the fluid in the jacket to produce a rotational motion, thereby enhancing the mixing effect of the fluid. This mixing action makes the fluid temperature at different positions in the jacket more uniform, avoids the situation where the local temperature difference is too large, and is conducive to maintaining stable heat transfer conditions.

[0013] Furthermore, a control valve is provided at the connection between the circulation device and the jacket. This control valve is a flow control valve. By adjusting the flow control valve, the flow rate of the fluid in the jacket can be precisely controlled according to specific process requirements, thereby achieving precise control of the heat transfer rate. The flow control valve can be used to adjust the fluid flow rate according to actual needs, avoiding unnecessary energy waste. In the early stages of the reaction or when a large amount of heat transfer is not required, the flow rate can be appropriately reduced to reduce the energy consumption of the circulation device. When the reaction requires rapid temperature increase or decrease, the flow rate can be increased to meet the heat transfer requirements.

[0014] Furthermore, the circulation device is a temperature-adjustable circulation device, and the temperature of the circulation device can be adjusted according to actual needs to avoid unnecessary energy waste. When high or low temperatures are not required, the power of the circulation device can be reduced to save energy.

[0015] Furthermore, a liquid level gauge is provided at the upper end of the stirring blade and is fixedly connected to the stirring blade. Positioning the liquid level gauge at the upper end of the stirring blade enables real-time monitoring of liquid level changes as the stirring blade moves. Since the stirring blade is typically immersed in the liquid within the synthesis tank, the fixed connection of the liquid level gauge to the stirring blade ensures that it is always in contact with the liquid, thereby providing accurate liquid level information. This also reduces errors in liquid level measurement and avoids inaccurate measurements caused by liquid level fluctuations or other factors. Whether during static or dynamic stirring, the liquid level is accurately and promptly reflected.

[0016] Furthermore, the exhaust port is a pressure-sensing exhaust port, which can monitor the pressure changes in the synthesis tank in real time. When the pressure exceeds the set safety value, the exhaust port will automatically open to release excess gas, thereby reducing the pressure in the tank and ensuring that the system operates within a safe pressure range. The function of automatically adjusting the pressure can reduce the need for manual intervention and reduce the workload of operators. At the same time, it can also avoid abnormal pressure conditions caused by human operational errors and improve production reliability and stability.

[0017] Furthermore, the coolant provided in the jacket is ethylene glycol refrigerant, which ensures that the jacket can continue to cool effectively in cold environments or working conditions requiring low-temperature cooling, and the cooling function will not fail due to freezing of the coolant. This means that under the same flow rate and temperature difference conditions, the ethylene glycol refrigerant can take away more heat, improve the cooling efficiency, and help to reduce the temperature of the cooled object more quickly. At the same time, it can reduce corrosion damage to the jacket and internal pipes of the equipment, extend the service life of the equipment, and reduce maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0019] The figure marks in the drawings of the specification include: cylinder 1, inner tank 2, feed port 3, motor 4, exhaust port 5, jacket 6, guide plate 7, circulation device 8, connecting pipe 9, circulation device 10, stirring rod 11, stirring blade 12, spoiler groove 13, groove 14, liquid level meter 15, air inlet 16, shielded stirrer 17, discharge port 18, stirring device 19.

[0020] Example 1 is basically as shown in the attached Figure 1 As shown: A lithium hexafluorophosphate synthesis tank includes an inner tank, which has an elliptical head structure at the upper and lower ends. A motor is provided at the center position of the upper end of the inner tank. A stirring device arranged inside the inner tank is connected to the motor drive, and stirring is performed by controlling the rotation of the stirring device by the motor. The stirring device arranged inside the inner tank includes a stirring blade and a stirring rod. One end of the stirring rod extends to the outside of the inner tank and is fixedly connected with the motor output shaft by a clip. A plurality of grooves and spoiler grooves are provided on the stirring blade, and the spoiler grooves are arranged in an inclined structure to improve the stirring effect during the stirring process.

[0021] A feed port is provided on one side of the motor, through which the material is fed into the inner tank. A pressure sensing exhaust port is provided on one side of the feed port. Through the sensing exhaust port, the pressure sensing exhaust port can monitor the pressure changes in the synthesis tank in real time. When the pressure exceeds the set safety value, the exhaust port will automatically open to release excess gas, thereby reducing the pressure in the tank and ensuring that the system operates within a safe pressure range. The function of automatically adjusting the pressure can reduce the need for manual intervention and reduce the workload of operators.

[0022] A cylinder is provided on the outside of the inner tank, and a sealed jacket is formed between the cylinder and the inner tank. A spiral guide plate is provided in the jacket that fits the inner tank. This guide plate can be set to conduct heat. A circulation device is provided on one side of the cylinder. The circulation device is circulated with the upper and lower ends of the jacket, and a flow control valve is installed at the connection position between the circulation device and the jacket to accurately control the circulation flow. In addition, the circulation device is a temperature-adjustable device, which can flexibly adjust the temperature of the medium in the jacket according to actual needs. The coolant set in the jacket is ethylene glycol refrigerant, which ensures that the jacket can continue to cool effectively in cold environments or working conditions requiring low-temperature cooling, and the cooling function will not fail due to freezing of the coolant. This means that under the same flow and temperature difference conditions, ethylene glycol refrigerant can take away more heat, improve the cooling efficiency, and help to reduce the temperature of the cooled object more quickly. At the same time, it can reduce corrosion damage to the jacket and internal pipes of the equipment, extend the service life of the equipment, and reduce maintenance and replacement costs.

[0023] A shielded agitator is provided at the bottom of the cylinder, and an air inlet and a discharge port are provided on one side of the shielded agitator. Both the air inlet and the discharge port are connected to the inner tank. Air is introduced through the air inlet, so that the gas can enter the inner tank and mix with the solution more evenly, avoiding local pressure unevenness and safety hazards that may be caused by adding gas from the top, and improving the stability and safety of the reaction; a liquid level gauge is fixedly installed at the upper end of the stirring plate, which can monitor the liquid level in real time, and the exhaust port adopts a pressure-sensing exhaust port, which can automatically adjust the air outlet according to the internal pressure.

[0024] In actual operation, lithium fluoride is added to the inner tank through the feed port and dissolved in high-purity anhydrous hydrogen fluoride to obtain an anhydrous hydrogen fluoride solution containing lithium fluoride. The motor is started to drive the stirring device to stir the solution. The inclined spoiler groove further enhances the stirring effect. The temperature in the jacket is adjusted by the circulation device. The spiral guide plate improves the heat exchange efficiency. Then, nitrogen is introduced from the air inlet. Under suitable conditions, a saturated solution of lithium hexafluorophosphate is obtained and finally discharged from the discharge port.

[0025] During the entire process, the liquid level gauge monitors the liquid level in real time, the pressure sensing exhaust port ensures the stability of the internal pressure, and the various components work together to ensure the efficient synthesis of lithium hexafluorophosphate.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is clear to those skilled in the art that various changes, modifications, substitutions, and variations of these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A lithium hexafluorophosphate synthesis tank, characterized in that: It includes an inner liner, and a motor is provided at the upper end of the inner liner, and the motor is driven and connected to a stirring device arranged inside the inner liner; a cylinder is provided on the outside of the inner liner, and a jacket is provided between the cylinder and the inner liner, and a guide plate is provided in the jacket; a circulation device is provided on one side of the cylinder and is connected to the jacket circulation; a shielded agitator is provided at the bottom of the cylinder, and an air inlet and a discharge port are provided on one side of the shielded agitator and are connected to the inner liner; a feed port and an exhaust port are provided on one side of the motor and are connected to the inner liner.

2. A lithium hexafluorophosphate synthesis tank according to claim 1, characterized in that: The stirring device includes a stirring rod and a stirring blade. The stirring rod is fixedly connected to the stirring blade, and the stirring rod is fixedly connected to the output end of the motor.

3. A lithium hexafluorophosphate synthesis tank according to claim 2, characterized in that: The stirring piece is provided with a plurality of spoiler grooves and grooves vertically arranged on the stirring piece.

4. A lithium hexafluorophosphate synthesis tank according to claim 3, characterized in that: The spoiler groove is arranged obliquely.

5. A lithium hexafluorophosphate synthesis tank according to claim 1, characterized in that: The guide plate is a spiral guide plate, which is fitted with the inner tank and is a heat-conducting guide plate.

6. A lithium hexafluorophosphate synthesis tank according to claim 1, characterized in that: A control valve is provided at the connection position between the circulation device and the jacket, and the control valve is a flow control valve.

7. A lithium hexafluorophosphate synthesis tank according to claim 1, characterized in that: The circulation device is a temperature-adjustable circulation device.

8. A lithium hexafluorophosphate synthesis tank according to claim 3, characterized in that: A liquid level gauge is provided at the upper end of the stirring piece and is fixedly connected to the stirring piece.

9. The lithium hexafluorophosphate synthesis tank according to claim 1, characterized in that: The exhaust port is a pressure-sensing exhaust port.

10. The lithium hexafluorophosphate synthesis tank according to claim 1, characterized in that: The coolant arranged in the jacket is ethylene glycol coolant.

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