Reaction equipment for preparing lithium hexafluorophosphate

Abstract

The invention relates to reaction equipment for preparing lithium hexafluorophosphate, which comprises a reaction kettle body, and a stirring shaft is rotatably mounted in the reaction kettle body; the feeding assembly comprises a set of discharging hoppers, and fixing plug bodies are installed on the bottom sides of the discharging hoppers in a liftable mode; the dispersing and discharging assembly comprises a set of arc-shaped guide grooves formed in the lower side of the fixed plug body, and the middles of the arc-shaped guide grooves protrude upwards; when the arc-shaped material guide groove rotates to pass through the bottom side of the fixed plug body, the driving mechanism drives the fixed plug body to leave the discharging opening of the discharging hopper; the heat exchange jacket is fixedly mounted on the outer side of the reaction kettle body, corresponding fixing grooves are concavely formed in the bottom side of the reaction kettle body at intervals, and corresponding heat exchange containers are respectively mounted in the fixing grooves in a swinging manner. According to the invention, the blanking uniformity of the material can be effectively and greatly improved, and the uniformity of the reaction temperature of the material in different reaction area ranges can be effectively and obviously improved.

Description

Technical Field

[0001] This invention relates to a reaction apparatus for preparing lithium hexafluorophosphate, which can quantitatively and uniformly feed materials for preparing lithium hexafluorophosphate and can effectively and accurately control the reaction temperature to effectively help improve the purity of lithium hexafluorophosphate. Background Technology

[0002] With the rapid development of new energy vehicles and the low-carbon economy, there are now higher requirements for the purity and manufacturing process of lithium hexafluorophosphate. As a result, the current development trend of lithium hexafluorophosphate is towards high-purity lithium hexafluorophosphate (purity of 99.95% or higher).

[0003] As a fine chemical product, high-purity lithium hexafluorophosphate has high standards for all aspects of its production process, and its industrial production threshold is relatively high. The existing synthesis of lithium hexafluorophosphate usually adopts the hydrogen fluoride solvent method, and its specific synthesis process is as follows: S1, fluorination of phosphorus pentachloride, solid phosphorus pentachloride is slowly added to an excess of anhydrous hydrogen fluoride cooled to a low temperature (usually below -20°C) to cause the following reaction: PCl5 + 5HF → PF5 + 5HCl, and the product PF5 is dissolved in anhydrous hydrogen fluoride by temperature and pressure control; S2, complexation of phosphorus pentafluoride with lithium fluoride, after the first step reaction is completed, the low temperature and pressure are maintained, and dry lithium fluoride is added in batches to the HF solution containing PF5 to cause the following reaction: PF5 + LiF → LiPF6. Because the reaction of phosphorus pentachloride with anhydrous hydrogen fluoride is highly exothermic, the addition of phosphorus pentachloride must be slow and uniform to ensure the smooth progress of the first reaction step. In the second reaction step, the complete reaction of lithium fluoride is crucial to achieving the designed purity; therefore, the uniformity of lithium fluoride feeding also needs to be controlled. Current methods for quantitative feeding of phosphorus pentachloride and lithium fluoride involve controlling the opening and closing of feeding valves to achieve batch feeding, followed by mixing with a stirring mechanism. Even with each feeding in a small range, the problem of fixed-point batch feeding still exists, leading to significant exothermic reactions at the feeding location and making it extremely difficult to ensure the uniformity of mixing between materials.

[0004] Furthermore, existing reaction equipment for lithium hexafluorophosphate preparation primarily relies on a heat exchange jacket located around the reactor body for temperature control. A heat exchange medium (liquid nitrogen) is continuously circulated into the jacket through corresponding heat exchange medium pipelines to control the reaction temperature. This temperature control process often suffers from the following problem: the temperature in the reaction zone near the heat exchange jacket is lower than the temperature in the reaction zone farther away from the jacket. This leads to significant errors in the accuracy of temperature control, which in turn affects the reaction process and results in the product purity failing to meet design requirements.

[0005] Therefore, the research objective of this invention is to design a reaction apparatus for the preparation of lithium hexafluorophosphate that can effectively and uniformly disperse and feed materials without affecting the feeding process, thereby significantly improving the uniformity of material feeding; and that can effectively and significantly improve the uniformity of reaction temperature of materials in different reaction zones, so as to ensure the smooth implementation of the reaction process and help improve the purity of the product. Summary of the Invention

[0006] To address the technical problems existing in the prior art, the present invention provides a reaction apparatus for preparing lithium hexafluorophosphate, which can effectively solve the technical problems existing in the prior art.

[0007] The technical solution of this invention is: A reaction apparatus for preparing lithium hexafluorophosphate, comprising: The reactor body has a stirring shaft rotatably mounted inside it, and the stirring shaft is driven by a corresponding drive motor. The feeding assembly includes a set of feeding hoppers installed on both sides of the top of the reactor body. The bottom side of each feeding hopper is equipped with a fixed plug that closes at the top and abuts against its feeding port. Each fixed plug is fixedly connected to a corresponding connecting rod facing upward. The connecting rods are movably connected to the feeding hoppers through elastic connectors. The dispersing and feeding assembly includes a set of arc-shaped material guide grooves disposed on the lower side of the fixed plug body. The middle part of the arc-shaped material guide grooves is raised upward and connected to the stirring shaft through a corresponding first connecting rod. The drive mechanism drives the fixed plug to leave the discharge port of the hopper when the arc-shaped guide chute rotates past the bottom side of the fixed plug. A heat exchange jacket is fixedly installed on the outside of the reactor body. The bottom side of the reactor body is provided with corresponding fixing grooves at intervals. Corresponding heat exchange containers are oscillatingly installed in the fixing grooves. The heat exchange containers are connected in parallel to an external heat exchange medium source. The oscillation angle of the heat exchange containers is proportional to the flow pressure of the heat exchange medium inside them.

[0008] The heat exchange jacket is connected to a corresponding heat exchange medium input pipe and a heat exchange medium output pipe. The upper part of the reactor body is connected to a corresponding liquid feed pipe, and the bottom of the reactor body is connected to a discharge pipe equipped with a discharge valve.

[0009] The driving mechanism includes a pulling component connected to the bottom side of the fixed plug and a driving component connected to the top of the arc-shaped guide trough. When the arc-shaped guide trough rotates past the bottom side of the fixed plug, the driving component drives the pulling component downward, and the fixed plug leaves the discharge port of the hopper. The material in the hopper is output through the gap between the fixed plug and the discharge port of the hopper and enters the corresponding arc-shaped guide trough. As the arc-shaped guide trough rotates with the stirring shaft, the material entering the arc-shaped guide trough is continuously and evenly fed into the reactor body.

[0010] The pulling assembly includes a set of inverted L-shaped pulling rods fixed to the bottom side of the fixed plug body, and corresponding guide wheels are respectively rotatably installed on the bottom side of the set of inverted L-shaped pulling rods; the driving assembly includes a set of connecting plates fixed to the top of the arc-shaped guide groove, and driving blocks with inclined bottom surfaces are respectively fixed to the top of the set of connecting plates facing outward. When the driving block moves past the position of the guide wheel, the inclined surface of the driving block forms a downward pulling drive on the guide wheel.

[0011] The connecting plate is made of spring steel plate, and the bent surface of the connecting plate is arranged in the same direction as the side of the arc-shaped guide groove. The bottom end of the driving block is fixed with a corresponding protrusion facing downward. The inner end of the guide wheel is respectively provided with a corresponding arc chamfer. When the guide wheel passes the bottom end of the driving block, the arc chamfer of the guide wheel contacts the protrusion and pushes the protrusion inward, causing the connecting plate to bend inward. After the driving block leaves the position of the guide wheel, the driving block swings continuously under the elastic force of the connecting plate. The vibration generated by the continuous swing is transmitted to the arc-shaped guide groove.

[0012] The bottom side of the arc-shaped material guide trough is provided with corresponding horizontal and vertical material dispersing components at different heights. The horizontal material dispersing component includes a shovel-type stirring blade disposed on the bottom side of the arc-shaped material guide trough. The shovel-type stirring blade is connected to the stirring shaft through a corresponding second connecting rod. The middle part of the shovel-type stirring blade is directly opposite the bottom end of the arc-shaped material guide trough. Along the rotation direction of the stirring shaft, the bottom side of the shovel-type stirring blade is arranged downwards, and along the bottom side of the shovel-type stirring blade is arranged upwards, the width of the shovel-type stirring blade increases progressively, and its top is arranged in an arc shape.

[0013] The vertical bulk material assembly includes a set of mixing blades inclinedly arranged on both sides of the lower part of the shovel-type stirring blades. The mixing blades are connected to the stirring shaft through corresponding third connecting rods. Along the stirring direction of the stirring shaft, the inclination directions of the set of mixing blades are opposite. The bottom end of the stirring shaft extends to the bottom side of the reactor body and is laterally fixed with corresponding stirring rods.

[0014] The bottom side of the fixed plug is provided with a feeding guide with a diameter greater than its maximum width. The bottom end of the feeding guide is narrowed to a diameter smaller than the width of the arc-shaped feeding groove. The feeding guide is fixed to a set of inverted L-shaped traction rods.

[0015] The elastic connector is a helical spring, and a corresponding end plate is fixed to the top of the connecting rod. The elastic connector is sleeved around the connecting rod and located between the end plate and the hopper.

[0016] The upper two sides of the heat exchange container are respectively sealed and rotatably installed with corresponding guide pipes. The guide pipes are respectively fixedly installed on corresponding fixed grooves. One guide pipe is pumped to an external heat exchange medium source, and the other guide pipe is connected to the corresponding heat exchange medium return pipe through a corresponding pressure valve. The middle part of the heat exchange container is respectively installed with a partition plate with its bottom end spaced apart from it. The middle part of the heat exchange container is respectively connected to an elastic bellows with its outer end sealed and fixed in the fixed groove. The outer periphery of the elastic bellows is respectively fixedly sleeved with a fixing spring connecting the heat exchange container and the fixed groove.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1) This invention is equipped with a set of feeding hoppers. During the reaction process, anhydrous hydrogen fluoride required for the reaction is first added quantitatively into the reactor body. Then, a quantitative amount of phosphorus pentachloride is added into one of the feeding hoppers. The drive motor is started to drive the stirring shaft to rotate. When the arc-shaped guide chute rotates past the position of the feeding hopper, that is, when it passes the bottom side of the fixed plug, the drive mechanism drives the fixed plug to leave the feeding port of the feeding hopper. Thus, the phosphorus pentachloride in the feeding hopper is output through the gap between the fixed plug and the feeding port of the feeding hopper and enters the corresponding arc-shaped guide chute. As the arc-shaped guide chute rotates with the stirring shaft, the phosphorus pentachloride entering the arc-shaped guide chute is continuously and evenly fed into the reactor body to achieve the dispersion of phosphorus pentachloride and to form a uniform contact between phosphorus pentachloride and anhydrous hydrogen fluoride, thereby effectively ensuring the smooth progress of the reaction process. Similarly, a quantitative amount of lithium fluoride is added into another feeding hopper, and the above actions are repeated to ensure the uniformity of lithium fluoride feeding, thereby ensuring that its reaction rate can be effectively improved and the purity of the product can be improved.

[0018] 2) Based on the heat exchange jacket, this invention further includes corresponding fixing grooves recessed at intervals on the bottom side of the reactor body. Within these grooves, corresponding heat exchange containers are oscillating and mounted. These heat exchange containers are connected in parallel to an external heat exchange medium source, and their oscillation angle is proportional to the flow pressure of the heat exchange medium within them. By controlling the flow pressure of the heat exchange medium within each container, the oscillation process of the containers can be effectively controlled. This not only effectively increases the contact rate between the heat exchange medium and the mixture, thereby improving heat exchange efficiency and enabling more precise control of the reaction temperature environment, but also effectively agitates the mixture within the reactor body, thus helping to improve the uniformity of material mixing.

[0019] 3) The driving mechanism of the present invention includes a pulling assembly connected to the bottom side of the fixed plug and a driving assembly connected to the top of the arc-shaped guide trough. The pulling assembly includes a set of inverted L-shaped pulling rods fixed to the bottom side of the fixed plug. The bottom side of the set of inverted L-shaped pulling rods is respectively rotatably mounted with corresponding guide wheels. The driving assembly includes a set of connecting plates fixed to the top of the arc-shaped guide trough. The top of the set of connecting plates is respectively fixed with a driving block with an inclined bottom surface. When the driving block moves past the position of the guide wheel, the inclined surface of the driving block can form a downward pulling drive on the guide wheel, so as to ensure that the arc-shaped guide trough of the present invention can smoothly form a downward pulling drive on the fixed plug when rotating past the position of the hopper, thus ensuring the practical effect of the present invention.

[0020] 4) The connecting plate of this invention is made of spring steel plate, with its bent surface aligned with the side of the arc-shaped guide trough. A corresponding protrusion is fixed downwards at the bottom end of the driving block, and corresponding arc-shaped chamfers are provided at the inner ends of the guide wheels. When the guide wheels pass the bottom end of the driving block, the arc-shaped chamfers of the guide wheels contact the protrusions and push them inwards, thereby driving the connecting plate to bend inwards. In this way, after the driving block leaves the guide wheel, it can continuously swing under the elastic force of the connecting plate, and the vibration generated by this continuous swing is transmitted to the arc-shaped guide trough. This ensures the smooth discharge of materials stored in the arc-shaped guide trough, further ensuring the practical effect of this invention.

[0021] 5) The bottom side of the arc-shaped material guide trough of the present invention is respectively provided with corresponding horizontal and vertical material dispersing components at different heights. The horizontal material dispersing component includes shovel-type stirring blades disposed on the bottom side of the arc-shaped material guide trough, with the middle portion of each shovel-type stirring blade facing the bottom end of the arc-shaped material guide trough. The vertical material dispersing component includes a set of mixing blades inclined on both sides of the lower part of the shovel-type stirring blades. Along the stirring direction of the stirring shaft, the inclination directions of the set of mixing blades are opposite. During the reaction process, the material in the arc-shaped material guide trough is continuously and uniformly fed to the upper side of the shovel-type stirring blades, and effectively and rapidly diffuses horizontally under the shoveling action of the shovel-type stirring blades. After horizontal diffusion, the material effectively and rapidly forms a longitudinal diffusion under the upward and downward turning action of the set of mixing blades, thereby further rapidly diffusing the material entering the reactor body, further assisting in improving the uniformity of material feeding and mixing of the present invention.

[0022] 6) Due to the arrangement of the traction and drive components, a large gap exists between the discharge port of the hopper and the arc-shaped guide trough. This can prevent the material from being accurately discharged into the arc-shaped guide trough, leading to a risk of material accumulating inside the reactor vessel. To address this, the present invention further provides a discharge conduit with a diameter greater than its maximum width on the bottom side of the fixed plug. The bottom end of the discharge conduit narrows to a diameter smaller than the width of the arc-shaped guide trough. This discharge conduit is fixed to a set of inverted L-shaped traction rods. The discharge conduit effectively guides the discharged material, ensuring its smooth and concentrated storage in the corresponding arc-shaped guide trough, further ensuring the practical effectiveness of the invention.

[0023] 7) The heat exchange container of the present invention has corresponding guide pipes sealed and rotatably installed on both sides of its upper part. The guide pipes are fixedly installed on corresponding fixed grooves. One guide pipe is pumped to an external heat exchange medium source, and the other guide pipe is connected to a corresponding heat exchange medium return pipe through a corresponding pressure valve. The middle part of the heat exchange container is equipped with a partition plate with its bottom end spaced apart from the partition plate. The middle part of the heat exchange container is connected to an elastic bellows with its outer end sealed and fixed in the fixed groove. The periphery of the elastic bellows is fixedly fitted with a fixing spring connecting the heat exchange container and the fixed groove. By controlling the opening and closing of the pressure valve, the flow pressure of the heat exchange medium in each heat exchange container can be controlled separately. When the flow pressure of the heat exchange medium in the heat exchange container increases, the heat exchange container swings upward; conversely, the heat exchange container swings downward under the elastic force of the elastic bellows and the fixing spring, so as to ensure the practical effect of the present invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2This is a cross-sectional view of the present invention.

[0026] Figure 3 A schematic diagram showing a structure with a horizontal and a vertical material distribution assembly located on the lower side of the material distribution assembly.

[0027] Figure 4 This is an assembly diagram of the feeding assembly, the dispersing assembly, and the driving mechanism of the present invention.

[0028] Figure 5 This is a cross-sectional view of the feeding assembly.

[0029] Figure 6 This is a schematic diagram of the traction component of the drive mechanism.

[0030] Figure 7 This is a schematic diagram of the drive component of the drive mechanism.

[0031] Figure 8 This is a schematic diagram of the heat exchange container assembly.

[0032] Figure 9 This is a cross-sectional view of the heat exchange vessel.

[0033] In the attached diagram: 1. Reactor body; 2. Stirring shaft; 3. Drive motor; 4. Feeding assembly; 401. Feeding hopper; 402. Fixed plug; 403. Connecting rod; 404. Elastic connector; 5. Dispersing and feeding assembly; 5. Arc-shaped guide chute; 502. First connecting rod; 6. Drive mechanism; 601. Pulling assembly; 6011. Inverted L-shaped pulling rod; 6012. Guide wheel; 602. Drive assembly; 6021. Connecting plate; 6022. Drive block; 7. Heat exchange jacket; 701. Heat exchange medium inlet pipe; 702. Heat exchange medium outlet pipe. 8. Fixed tank; 9. Heat exchange container; 901. Guide pipe; 10. Liquid feed pipe; 11. Discharge pipe; 1101. Discharge valve; 12. Protrusion; 13. Chamfered arc surface; 14. Horizontal material distribution assembly; 1401. Shovel-type stirring blade; 1402. Second connecting rod; 15. Vertical material distribution assembly; 1501. Mixing blade; 1502. Third connecting rod; 16. Stirring rod; 17. Discharge guide pipe; 18. End plate; 19. Pressure valve; 20. Heat exchange medium return pipe; 21. Baffle plate; 22. Elastic corrugated pipe; 23. Fixed spring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] refer to Figure 1-9 A reaction apparatus for preparing lithium hexafluorophosphate, comprising: The reactor body 1 has a stirring shaft 2 rotatably installed inside it, and the stirring shaft 2 is driven by a corresponding drive motor 3. The feeding assembly 4 includes a set of feeding hoppers 401 installed on both sides of the top of the reactor body 1. The bottom side of each feeding hopper 401 is equipped with a fixed plug 402 that closes at the top and abuts against its feeding port. Each fixed plug 402 is fixedly connected to a corresponding connecting rod 403 facing upward. The connecting rod 403 is movably connected to the feeding hopper 401 through an elastic connector 404. The dispersing and feeding assembly 5 includes a set of arc-shaped guide grooves 501 disposed on the lower side of the fixed plug 402. The middle part of the arc-shaped guide grooves 501 is raised upward and connected to the stirring shaft 2 through a corresponding first connecting rod 502. The drive mechanism 6 drives the fixed plug 402 away from the discharge port of the hopper 401 when the arc-shaped guide groove 501 rotates past the bottom side of the fixed plug 402. A heat exchange jacket 7 is fixedly installed on the outside of the reactor body 1. The bottom side of the reactor body 1 is provided with corresponding fixing grooves 8 at intervals. Corresponding heat exchange containers 9 are oscillatingly installed in the fixing grooves 8. The heat exchange containers 9 are connected to an external heat exchange medium source by a pump in parallel. The oscillation angle of the heat exchange containers 9 is proportional to the flow pressure of the heat exchange medium inside them.

[0036] The heat exchange jacket 7 is externally connected to a heat exchange medium inlet pipe 701 and a heat exchange medium outlet pipe 702. The upper part of the reactor body 1 is connected to a corresponding liquid feed pipe 10, and the bottom of the reactor body 1 is externally connected to a discharge pipe 11 equipped with a discharge valve 1101. In this embodiment, the reactor body 1 is also externally connected to a corresponding inert gas flow pipe (not labeled). Inert gas is introduced into the reactor body 1 through the inert gas flow pipe so that the entire preparation process of lithium hexafluorophosphate is carried out under the protection of inert gas, and the pressure inside the reactor body 1 is effectively controlled.

[0037] The elastic connector 404 is a helical spring, and the top of the connecting rod 403 is fixedly connected to a corresponding end plate 18. The elastic connector 404 is sleeved around the connecting rod 403 and located between the end plate 18 and the hopper 401.

[0038] This invention includes a set of feeding hoppers 401. During the reaction process, anhydrous hydrogen fluoride required for the reaction is first added quantitatively to the reaction vessel 1. Then, a quantitative amount of phosphorus pentachloride is added to one of the feeding hoppers 401. The drive motor 3 is started to drive the stirring shaft 2 to rotate. When the arc-shaped guide chute 501 rotates past the position of the feeding hopper 401, that is, when it passes the bottom side of the fixed plug 402, the drive mechanism 6 drives the fixed plug 402 away from the discharge port of the feeding hopper 401, so that the phosphorus pentachloride in the feeding hopper 401 passes through the fixed plug 402 and the discharge port of the feeding hopper 401. The phosphorus pentachloride is discharged from the interval and enters the corresponding arc-shaped feed trough 501. As the arc-shaped feed trough 501 rotates with the stirring shaft 2, the phosphorus pentachloride is continuously and evenly fed into the reactor body 1 to achieve the dispersion of phosphorus pentachloride and to form a uniform contact between phosphorus pentachloride and anhydrous hydrogen fluoride, thereby effectively ensuring the smooth progress of the reaction process. Similarly, a certain amount of lithium fluoride is added to another feed hopper 401, and the above actions are repeated to ensure the uniformity of lithium fluoride feeding, thereby ensuring that its reaction rate can be effectively improved and the purity of the product can be improved.

[0039] Based on the heat exchange jacket 7, this invention further provides corresponding fixing grooves 8 recessed at intervals on the bottom side of the reactor body 1. Within each fixing groove 8, a heat exchange container 9 is oscillatingly mounted. These heat exchange containers 9 are connected in parallel to an external heat exchange medium source, and the oscillation angle of each heat exchange container 9 is proportional to the flow pressure of the heat exchange medium inside it. By controlling the flow pressure of the heat exchange medium within each heat exchange container 9, the oscillation process of the heat exchange container 9 can be effectively controlled. This not only effectively increases the contact rate between the heat exchange medium and the mixture, thereby improving heat exchange efficiency and enabling more precise control of the reaction temperature environment, but also effectively agitates the mixture within the reactor body 1, helping to improve the uniformity of material mixing.

[0040] The driving mechanism 6 includes a pulling component 601 connected to the bottom side of the fixed plug 402 and a driving component 602 connected to the top of the arc-shaped guide trough 501. When the arc-shaped guide trough 501 rotates past the bottom side of the fixed plug 402, the driving component 602 drives the pulling component 601 downward, and the fixed plug 402 leaves the discharge port of the discharge hopper 401. The material in the discharge hopper 401 is output through the gap between the fixed plug 402 and the discharge port of the discharge hopper 401 and enters the corresponding arc-shaped guide trough 501. During the rotation of the arc-shaped guide trough 501 with the stirring shaft 2, the material entering the arc-shaped guide trough 501 is continuously and evenly fed into the reactor body 1.

[0041] The pulling assembly 601 includes a set of inverted L-shaped pulling rods 6011 fixed to the bottom side of the fixed plug 402. The bottom side of the set of inverted L-shaped pulling rods 6011 is respectively rotatably mounted with corresponding guide wheels 6012. The driving assembly 602 includes a set of connecting plates 6021 fixed to the top of the arc-shaped guide groove 501. The top of the set of connecting plates 6021 is respectively fixed with driving blocks 6022 with inclined bottom surfaces. When the driving block 6022 moves past the position of the guide wheel 6012, the inclined surface of the driving block 6022 forms a downward pulling drive on the guide wheel 6012.

[0042] With the combined action of the traction component 601 and the drive component 602, the arc-shaped guide groove 501 of the present invention can smoothly pull the fixed plug 402 downward when it rotates past the position of the hopper 401, thereby ensuring the practical effect of the present invention.

[0043] The connecting plate 6021 is made of spring steel plate. The bending surface of the connecting plate 6021 is arranged in the same direction as the side of the arc-shaped guide groove 501. The bottom end of the driving block 6022 is fixed with a corresponding protrusion 12 facing downward. The inner end of the guide wheel 6012 is respectively provided with a corresponding arc chamfer 13. When the guide wheel 6012 passes the bottom end of the driving block 6022, the arc chamfer 13 of the guide wheel 6012 contacts the protrusion 12 and pushes the protrusion 12 inward, causing the connecting plate 6021 to bend inward. After the driving block 6022 leaves the position of the guide wheel 6012, the driving block 6022 swings continuously under the elastic force of the connecting plate 6021. The vibration generated by the continuous swing is transmitted to the arc-shaped guide groove 501. In a vibrating environment, it can effectively ensure that the material stored in the arc-shaped guide trough 501 can be smoothly discharged during its rotation, thereby further ensuring the practical effect of the present invention.

[0044] The bottom side of the arc-shaped material guide trough 501 is provided with corresponding horizontal material distribution components 14 and vertical material distribution components 15 arranged at different heights. The horizontal material distribution component 14 includes a shovel-type stirring blade 1401 disposed on the bottom side of the arc-shaped material guide trough 501. The shovel-type stirring blade 1401 is connected to the stirring shaft 2 through a corresponding second connecting rod 1402. The middle part of the shovel-type stirring blade 1401 is directly opposite the bottom end of the arc-shaped material guide trough 501. Along the rotation direction of the stirring shaft 2, the bottom side of the shovel-type stirring blade 1401 is arranged downwards and upwards. The width of the shovel-type stirring blade 1401 increases progressively and its top is arc-shaped.

[0045] The vertical material distribution assembly 15 includes a set of mixing blades 1501 inclinedly arranged on both sides of the lower part of the shovel-type stirring blade 1401. The mixing blades 1501 are connected to the stirring shaft 2 through corresponding third connecting rods 1502. Along the stirring direction of the stirring shaft 2, the inclination directions of the set of mixing blades 1501 are opposite. The bottom end of the stirring shaft 2 extends to the bottom side of the reactor body 1 and is laterally fixed with a corresponding stirring rod 16.

[0046] During the reaction, the material in the arc-shaped feed trough 501 is continuously and evenly fed to the upper side of the shovel-type stirring blade 1401, and effectively diffuses rapidly in the horizontal direction under the shoveling action of the shovel-type stirring blade 1401; after horizontal diffusion, the material effectively and rapidly forms longitudinal diffusion under the upward and downward turning action of a set of mixing blades 1501, thereby further rapidly diffusing the material entering the reaction vessel 1, so as to further help improve the feeding uniformity and mixing uniformity of the present invention.

[0047] Due to the arrangement of the pulling component 601 and the driving component 602, there is a large gap between the discharge port of the discharge hopper 401 and the arc-shaped guide trough 501. This will prevent the material from being accurately discharged into the arc-shaped guide trough 501, resulting in the risk of material accumulating and entering the reactor body 1. To address this, the present invention further provides a discharge conduit 17 with a diameter greater than its maximum width on the bottom side of the fixed plug 402. The bottom end of the discharge conduit 17 is narrowed to a diameter smaller than the width of the arc-shaped guide trough 501. The discharge conduit 17 is fixed to a set of inverted L-shaped pulling rods 6011. Under the action of the discharge conduit 17, the discharged material is effectively guided, so as to effectively concentrate and store the discharged material into the corresponding arc-shaped guide trough 501, thereby further ensuring the practical effect of the present invention.

[0048] The upper two sides of the heat exchange container 9 are respectively sealed and rotatably installed with corresponding guide pipes 901. The guide pipes 901 are respectively fixedly installed on the corresponding fixed grooves 8. One guide pipe 901 is pumped to an external heat exchange medium source, and the other guide pipe 901 is connected to the corresponding heat exchange medium return pipe 20 through the corresponding pressure valve 19. The middle part of the heat exchange container 9 is respectively installed with a partition plate 21 with its bottom end spaced apart from it. The middle part of the heat exchange container 9 is respectively connected to an elastic bellows 22 with its outer end sealed and fixed in the fixed groove 8. The periphery of the elastic bellows 22 is respectively fixedly sleeved with a fixing spring 23 connecting the heat exchange container 9 and the fixed groove 8.

[0049] By controlling the opening and closing of the pressure valve 19, the flow pressure of the heat exchange medium in each heat exchange container 9 can be controlled separately. When the flow pressure of the heat exchange medium in the heat exchange container 9 exceeds the set value and continues to rise, the heat exchange container 9 swings upward; otherwise, the heat exchange container 9 swings downward under the elastic force of the elastic bellows 22 and the fixed spring 23.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A reaction apparatus for preparing lithium hexafluorophosphate, characterized in that, include: The reactor body (1) is equipped with a stirring shaft (2) which is rotatably installed inside the reactor body (1). The stirring shaft (2) is driven by a corresponding drive motor (3). The feeding assembly (4) includes a set of feeding hoppers (401) installed on both sides of the top of the reactor body (1). The bottom side of each feeding hopper (401) is equipped with a fixed plug (402) that closes at the top and abuts against its feeding port. Each fixed plug (402) is fixedly connected to a corresponding connecting rod (403) facing upward. The connecting rod (403) is movably connected to the feeding hopper (401) through an elastic connector (404). The dispersing and feeding assembly (5) includes a set of arc-shaped guide grooves (501) disposed on the lower side of the fixed plug (402). The middle part of the arc-shaped guide grooves (501) is raised upward and connected to the stirring shaft (2) through a corresponding first connecting rod (502). When the arc-shaped guide groove (501) rotates past the bottom side of the fixed plug (402), the driving mechanism (6) drives the fixed plug (402) to leave the discharge port of the hopper (401); A heat exchange jacket (7) is fixedly installed on the outside of the reactor body (1). The bottom side of the reactor body (1) is provided with corresponding fixing grooves (8) at intervals. The fixing grooves (8) are respectively oscillatingly installed with corresponding heat exchange containers (9). The heat exchange containers (9) are connected to the external heat exchange medium source by a parallel pump. The oscillation angle of the heat exchange containers (9) is proportional to the flow pressure of the heat exchange medium inside them.

2. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 1, characterized in that, The heat exchange jacket (7) is connected to a heat exchange medium input pipe (701) and a heat exchange medium output pipe (702) to the outside. The upper part of the reactor body (1) is connected to a corresponding liquid feed pipe (10), and the bottom of the reactor body (1) is connected to a discharge pipe (11) with a discharge valve (1101) installed.

3. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 1, characterized in that, The driving mechanism (6) includes a pulling component (601) connected to the bottom side of the fixed plug (402) and a driving component (602) connected to the top of the arc-shaped guide trough (501). When the arc-shaped guide trough (501) rotates past the bottom side of the fixed plug (402), the driving component (602) drives the pulling component (601) downward, and the fixed plug (402) leaves the discharge port of the hopper (401). The material in the hopper (401) is output through the gap between the fixed plug (402) and the discharge port of the hopper (401) and enters the corresponding arc-shaped guide trough (501). During the process of the arc-shaped guide trough (501) rotating with the stirring shaft (2), the material entering the arc-shaped guide trough (501) is continuously and evenly fed into the reactor body (1).

4. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 3, characterized in that, The pulling assembly (601) includes a set of inverted L-shaped pulling rods (6011) fixed to the bottom side of the fixed plug (402), and the bottom side of the set of inverted L-shaped pulling rods (6011) is respectively rotatably mounted with corresponding guide wheels (6012); the driving assembly (602) includes a set of connecting plates (6021) fixed to the top of the arc-shaped guide groove (501), and the top of the set of connecting plates (6021) is respectively fixed with driving blocks (6022) with inclined bottom surfaces. When the driving block (6022) moves past the position of the guide wheel (6012), the inclined surface of the driving block (6022) forms a downward pulling drive on the guide wheel (6012).

5. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 4, characterized in that, The connecting plate (6021) is made of spring steel plate. The bent surface of the connecting plate (6021) is arranged in the same direction as the side of the arc-shaped guide groove (501). The bottom end of the driving block (6022) is fixedly connected with a corresponding protrusion (12) facing downward. The inner end of the guide wheel (6012) is respectively provided with a corresponding arc chamfer (13). When the guide wheel (6012) passes the bottom end of the driving block (6022), the guide wheel (6012) 2) The chamfer (13) of the arc surface makes contact with the protrusion (12) and pushes the protrusion (12) inward, causing the connecting plate (6021) to bend inward; after the driving block (6022) leaves the position of the guide wheel (6012), the driving block (6022) swings continuously under the elastic force of the connecting plate (6021), and the vibration generated by the continuous swing is transmitted to the arc-shaped guide groove (501).

6. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 1, characterized in that, The bottom side of the arc-shaped guide trough (501) is provided with corresponding horizontal material distribution components (14) and vertical material distribution components (15) at different heights. The horizontal material distribution component (14) includes a shovel-type stirring blade (1401) disposed on the bottom side of the arc-shaped guide trough (501). The shovel-type stirring blade (1401) is connected to the stirring shaft (2) through a corresponding second connecting rod (1402). The middle part of the shovel-type stirring blade (1401) is directly opposite the bottom end of the arc-shaped guide trough (501). Along the rotation direction of the stirring shaft (2), the bottom side of the shovel-type stirring blade (1401) is arranged downwards and upwards. The width of the shovel-type stirring blade (1401) increases progressively and its top is arc-shaped.

7. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 6, characterized in that, The vertical bulk material assembly (15) includes a set of mixing blades (1501) inclinedly arranged on both sides of the lower part of the shovel-type stirring blade (1401). The mixing blades (1501) are connected to the stirring shaft (2) through a corresponding third connecting rod (1502). Along the stirring direction of the stirring shaft (2), the set of mixing blades (1501) are arranged in opposite directions. The bottom end of the stirring shaft (2) extends to the bottom side of the reactor body (1) and is laterally fixed with a corresponding stirring rod (16).

8. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 4, characterized in that, The bottom side of the fixed plug (402) is provided with a feeding guide (17) with a diameter greater than its maximum width. The bottom end of the feeding guide (17) is narrowed to a diameter smaller than the width of the arc-shaped guide groove (501). The feeding guide (17) is fixed to a set of inverted L-shaped pull rods (6011).

9. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 1, characterized in that, The elastic connector (404) is a helical spring. The top of the connecting rod (403) is fixed with a corresponding end plate (18). The elastic connector (404) is sleeved on the periphery of the connecting rod (403) and located between the end plate (18) and the hopper (401).

10. The reaction apparatus for preparing lithium hexafluorophosphate according to claim 1, characterized in that, The upper two sides of the heat exchange container (9) are respectively sealed and rotatably installed with corresponding guide pipes (901). The guide pipes (901) are respectively fixedly installed on the corresponding fixed grooves (8). One guide pipe (901) is pumped to the external heat exchange medium source, and the other guide pipe (901) is connected to the corresponding heat exchange medium return pipe (20) through the corresponding pressure valve (19). The middle part of the heat exchange container (9) is respectively installed with a partition plate (21) with its bottom end spaced apart from it. The middle part of the heat exchange container (9) is respectively connected to an elastic bellows (22) with its outer end sealed and fixed in the fixed groove (8). The outer periphery of the elastic bellows (22) is respectively fixedly sleeved with a fixed spring (23) connected between the heat exchange container (9) and the fixed groove (8).

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