A high-purity lithium hexafluorophosphate production device

Abstract

The utility model discloses a high -purity lithium hexafluorophosphate production device, include: drying bottom case, drying bottom case top is equipped with separation middle case, separation middle case top is equipped with feeding inverted trug through box, and the both sides symmetry of separation middle case are equipped with sliding inclined mouth, and the inboard lower extreme of separation middle case is fixedly connected with the partition board spare, and separation middle case inside and outside are equipped with separation mechanism together, and the back lower extreme of drying bottom case is fixedly connected with the drying fan, and the back middle part screw thread connection of drying bottom case has the wall pipe, and the inside fixed connection of wall pipe has the filter screen, and the inside fixed connection of drying bottom case has the isolation board, the utility model discloses through motor no.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium hexafluorophosphate production equipment, specifically a high-purity lithium hexafluorophosphate production device. Background Technology

[0002] Lithium hexafluorophosphate is a white crystalline powder and an important lithium salt, mainly used in the electrolyte of lithium batteries as a lithium-ion conducting medium. There are various methods for synthesizing lithium hexafluorophosphate, with the hydrogen fluoride solvent method being commonly used in industry. This method involves reacting lithium fluoride and phosphorus pentafluoride in anhydrous hydrofluoric acid solvent to produce lithium hexafluorophosphate. This method has a high raw material utilization rate and can achieve a high level of product purity, making it suitable for large-scale industrial production.

[0003] First, high-purity lithium fluoride is dissolved in anhydrous hydrofluoric acid to form a homogeneous solution. Then, purified phosphorus pentafluoride gas is introduced into the solution, and the reaction is carried out under certain temperature and stirring conditions. After the reaction, lithium hexafluorophosphate is obtained through separation, washing, and drying. However, in existing lithium hexafluorophosphate production equipment, when separating the solution, a spiral blade is generally used to drive the crystal forward after filtration. This method causes significant friction and compression between the spiral blade and the crystal, making the crystal easily break and producing fine powder. When using a filter plate for crystal separation, crystal particles of different sizes in the solution are easily embedded in the pores of the filter plate, causing blockage and a sharp decrease in the solution filtration rate, which seriously affects production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the problems in existing lithium hexafluorophosphate production equipment where, during solution separation, spiral blades are typically used to drive the crystals forward after filtration. However, this method generates significant friction and compression between the spiral blades and the crystals, leading to easy crystal breakage and the production of fine powder. Furthermore, when using a filter plate for crystal separation, crystal particles of varying sizes in the solution easily become embedded in the pores of the filter plate, causing blockage and a sharp decrease in solution filtration speed, severely impacting production efficiency. Therefore, this invention provides a high-purity lithium hexafluorophosphate production device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-purity lithium hexafluorophosphate production device, comprising: a drying bottom box, a separation middle box at the top of the drying bottom box, a feeding hopper box at the top of the separation middle box, sliding oblique openings symmetrically opened on both sides of the separation middle box, a partition plate fixedly connected to the lower inner side of the separation middle box, a separation mechanism jointly provided inside and outside the separation middle box, a drying fan fixedly connected to the lower back of the drying bottom box, a wall tube threadedly connected to the middle of the back of the drying bottom box, a filter screen fixedly connected inside the wall tube, an isolation plate fixedly connected inside the drying bottom box, an inverted V-shaped material discharge plate fixedly connected to the middle inner side of the feeding hopper box, and a sliding door slidably connected to the front of the drying bottom box.

[0006] As a further embodiment of this utility model: the lower outer end of the feeding hopper box is fixedly connected to a perforated connecting skirt frame, the upper and lower outer ends of the separating middle box are also provided with perforated connecting skirt frame structures, and the upper outer end of the drying bottom box is provided with a perforated connecting skirt frame structure.

[0007] As a further embodiment of this utility model: the separation mechanism includes a porous inclined plate and a filter membrane. The porous inclined plate is fixedly connected to the lower inner side of the separation chamber, and the filter membrane is laid on the surface of the porous inclined plate. A supporting inclined box, a first motor, a lead screw, and a slide block are also included. The supporting inclined box is fixedly connected to one end of the front of the separation chamber, the first motor is fixedly connected to one end of the outer side of the supporting inclined box, the lead screw is rotatably connected to the inner side of the supporting inclined box, and the slide block is slidably connected to the inside of the supporting inclined box. A second motor, a sliding block, a rotating shaft, a brush roller, and a folded waterproof membrane are also included. The second motor is fixedly connected to the top of the slide block, the sliding block is slidably connected to the inside of the sliding inclined passage, the rotating shaft is rotatably connected to the inside of the sliding block, the brush roller is fixedly connected to one end of the rotating shaft, and the folded waterproof membrane is symmetrically fixedly connected to both sides of the sliding block.

[0008] As a further embodiment of this utility model: a sealing frame strip is fixedly connected to the bottom center of the feeding hopper box, a sealing frame groove is provided on the top of the separation box, a sealing frame strip structure is also provided at the bottom center of the separation box, and a sealing frame groove structure is also provided at the top center of the drying bottom box, with the sealing frame strip and the sealing frame groove being compatible.

[0009] As a further embodiment of this utility model: two sets of the partition plate, the separation mechanism and the isolation plate are provided, the partition plate and the isolation plate are movably connected, and the other end of the wall tube is connected to the air outlet pipe of the drying fan through a flange.

[0010] As a further embodiment of this utility model: the perforated inclined plate is located at the lower part and is fixedly connected to the partition plate; the other end of the lead screw passes through the support inclined box and is fixedly connected to one output end of the motor; and the slide is threadedly connected to the lead screw.

[0011] As a further embodiment of this utility model: the other end of the rotating shaft is fixedly connected to the second output end of the motor, the other end of the folded waterproof membrane is fixedly connected to the edge of the sliding oblique passage, and there are two sets of both the sliding block and the rotating shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, lithium hexafluorophosphate solution enters the separation chamber from the feed hopper. An inverted V-shaped discharge plate ensures the solution flows evenly to both sides of the filter membranes, trapping crystal particles. The filtered solution then flows through the pores of the filter membrane and the porous inclined plate into the drying chamber, where it is separated by a partition plate. A motor drives a lead screw to rotate, causing the slide and brush roller to move horizontally. A second motor drives the brush roller to rotate and scrape the filter membrane, causing crystals to detach and enter the channels formed by the partition plates. A folded waterproof membrane prevents solution leakage and avoids the breakage and fine powder problems caused by the spiral blades driving the crystals, as well as filtration issues. The cost of clogging the orifice plate or carrying away small crystals is wasted. After the crystals fall into the drying chamber, the drying fan blows clean hot air through the wall tube with a removable filter screen for drying. Finally, the sliding door is opened to collect the product. The feeding hopper, the separation chamber, and the drying chamber are connected by a multi-hole connecting skirt frame and fasteners, which facilitates disassembly, cleaning, and maintenance. The sealing frame strip and sealing frame groove ensure the sealing effect after connection. This device efficiently separates crystals and solutions, improves product purity, reduces maintenance costs, and ensures long-term stable operation. This device has the advantages of high separation efficiency, high product purity, and convenient maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the drying bottom box in this utility model;

[0016] Figure 3 This is a schematic diagram of the separation box in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the feeding hopper box in this utility model;

[0018] Figure 5 This is a schematic diagram of the separation mechanism in this utility model;

[0019] Figure 6 This is a schematic diagram of the drying fan in this utility model.

[0020] In the diagram: 1. Drying bottom box; 2. Separation middle box; 3. Feed hopper box; 4. Sliding inclined port; 5. Divider plate; 6. Separation mechanism; 601. Perforated inclined plate; 602. Filter membrane; 603. Support inclined box; 604. Motor 1; 605. Lead screw; 606. Slide seat; 607. Motor 2; 608. Sliding block; 609. Rotating shaft; 610. Brush roller; 611. Folded waterproof membrane; 7. Drying fan; 8. Wall tube; 9. Filter screen; 10. Divider plate; 11. Inverted V-shaped material discharge plate; 12. Sliding door; 13. Perforated connecting skirt frame; 14. Sealing frame strip; 15. Sealing frame groove. Detailed Implementation

[0021] 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.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0023] Reference Figures 1 to 6In this embodiment of the present invention, a high-purity lithium hexafluorophosphate production device includes: a drying bottom box 1, which serves as the bottom support component of the entire device and provides space for drying the separated crystals; a separation middle box 2 is provided on the top of the drying bottom box 1, which is the main place for solution separation, and performs crystal and solution separation operations on the incoming lithium hexafluorophosphate solution; and a feeding inlet box 3 is provided on the top of the separation middle box 2 for receiving the lithium hexafluorophosphate solution.

[0024] The separating chamber 2 has symmetrical sliding oblique openings 4 on both sides. A partition plate 5 is fixedly connected to the lower inner side of the separating chamber 2. The separating chamber 2 has a separation mechanism 6 both inside and outside. A drying fan 7 is fixedly connected to the lower back of the drying chamber 1. A wall tube 8 is threadedly connected to the middle of the back of the drying chamber 1. A filter screen 9 is fixedly connected inside the wall tube 8. An isolation plate 10 is fixedly connected inside the drying chamber 1. When the crystal falls between the two sets of isolation plates 10 inside the drying chamber 1, the drying fan 7 starts and blows hot air into the drying chamber 1 through the wall tube 8. The filter screen 9 inside the wall tube 8 can filter out impurities in the hot air, ensuring that the hot air entering the drying chamber 1 is clean. Through the connection between the wall tube 8, the drying chamber 1, and the drying fan 7, the wall tube 8 can be disassembled and the filter screen 9 can be replaced. Then the hot air flows inside the drying chamber 1 to dry the solution, remove the water or other volatile substances, and further improve the purity and quality of the solution.

[0025] The inner middle of the feeding hopper box 3 is fixedly connected to an inverted V-shaped material discharge plate 11. The front of the drying bottom box 1 is slidably connected to a sliding door 12. There are two sets of partition plates 5, separation mechanism 6 and isolation plate 10. The partition plates 5 and isolation plate 10 are movably inserted. The other end of the wall pipe 8 is connected to the air outlet pipe of the drying fan 7 through a flange.

[0026] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The lower outer side of the feed hopper box 3 is fixedly connected to a perforated connecting skirt frame 13. The upper and lower outer sides of the separation box 2 are also provided with perforated connecting skirt frame 13 structures. The upper outer side of the drying bottom box 1 is provided with a perforated connecting skirt frame 13 structure. The feed hopper box 3, the separation box 2 and the drying bottom box 1 are connected by perforated connecting skirt frames 13 and fasteners. This modular connection allows for easy disassembly after long-term use, thus facilitating cleaning and maintenance.

[0027] A sealing frame strip 14 is fixedly connected to the bottom center of the feeding hopper box 3. A sealing frame groove 15 is opened on the top of the separation box 2. A sealing frame strip 14 structure is also provided at the bottom center of the separation box 2. A sealing frame groove 15 structure is also provided at the top center of the drying bottom box 1. The sealing frame strip 14 and the sealing frame groove 15 are compatible. The sealing frame strip 14 and the sealing frame groove 15 ensure the sealing effect after the feeding hopper box 3, the separation box 2 and the drying bottom box 1 are connected.

[0028] Reference Figure 1 and Figure 5 The separation mechanism 6 includes a porous inclined plate 601 and a filter membrane 602. The porous inclined plate 601 is fixedly connected to the lower end of the inner side of the separation chamber 2, and the filter membrane 602 is laid on the surface of the porous inclined plate 601.

[0029] The inclined box 603, motor 604, lead screw 605 and slide 606 are supported. The inclined box 603 is fixedly connected to one end of the front of the separation box 2. The motor 604 is fixedly connected to one end of the outer side of the inclined box 603. The lead screw 605 is rotatably connected to the inner side of the inclined box 603. The slide 606 is slidably connected to the inside of the inclined box 603.

[0030] The components include a second motor 607, a sliding block 608, a rotating shaft 609, a brush roller 610, and a folded waterproof membrane 611. The second motor 607 is fixedly connected to the top of the slide block 606. The sliding block 608 is slidably connected to the inside of the sliding oblique opening 4. The rotating shaft 609 is rotatably connected to the inside of the sliding block 608. The brush roller 610 is fixedly connected to one end of the rotating shaft 609. The folded waterproof membrane 611 is symmetrically fixedly connected to both sides of the sliding block 608.

[0031] The porous inclined plate 601 is located at the lower part and is fixedly connected to the partition plate 5. The other end of the screw 605 passes through the supporting inclined box 603 and is fixedly connected to the output end of the motor 604. The slide block 606 is threadedly connected to the screw 605. The other end of the rotating shaft 609 is fixedly connected to the output end of the motor 607. The other end of the folded waterproof membrane 611 is fixedly connected to the side end of the sliding inclined port 4. There are two sets of sliding blocks 608 and rotating shafts 609. The lithium hexafluorophosphate solution enters the separation chamber 2 from the feed inlet box 3. During the feeding process, the inverted V-shaped discharge plate 11 plays a role in dispersing the solution evenly, preventing the solution from accumulating in one place, and allowing it to flow evenly to the filter membranes 602 on both sides. The crystal particles are trapped by the filter membrane, while the filtered solution flows down through the holes of the filter membrane 602 and the porous inclined plate 601 until it falls into the feed hopper box 3, where it is separated by the isolation plate 10 for further processing. Then, the motor 604 drives the lead screw 605 to rotate, which drives the slide 606 to move horizontally along the support inclined box 603, so that the sliding block 608 and the brush roller 610 move synchronously. At the same time, the motor 607 drives the brush roller 610 to rotate, scraping the membrane surface, so that the crystals detach from the filter membrane 602 and enter the channel formed between the two sets of separating plates 5. This forms a highly efficient separation. The folded waterproof membrane 611 moves with the sliding block 608 to prevent the solution from leaking from the sliding inclined port 4.

[0032] The working principle of this utility model is as follows:

[0033] Step 1: The lithium hexafluorophosphate solution enters the separation chamber 2 from the feed inverted bucket box 3. During the feeding process, the inverted V-shaped discharge plate 11 plays a role in dispersing the solution evenly, preventing it from accumulating in one place. The solution flows evenly to the filter membranes 602 on both sides, where crystal particles in the solution are trapped. The filtered solution then flows down through the holes of the filter membrane 602 and the porous inclined plate 601 until it falls into the feed inverted bucket box 3, where it is separated by the isolation plate 10 for subsequent processing. Subsequently, the motor 604 drives the lead screw 605 to rotate, causing the slide 606 to move horizontally along the supporting inclined box 603, thus moving the sliding block 608 and the brush roller. Simultaneously, the second motor 607 drives the brush roller 610 to rotate, scraping the membrane surface and causing the crystals to detach from the filter membrane 602 and enter the channel formed between the two sets of separator plates 5, thus forming an efficient separation. The folded waterproof membrane 611 moves with the sliding block 608 to prevent the solution from leaking from the sliding oblique port 4. This method can avoid the problem of crystal breakage and fine powder generation caused by friction and squeezing between the spiral blades and the crystals during separation, which affects the purity of the product. It also avoids the problem of filter pores being blocked or carrying away small crystals when using only filter plates for separation, which leads to a waste of cost.

[0034] Step 2: When the crystals fall between the two sets of isolation plates 10 inside the drying chamber 1, the drying fan 7 starts and blows hot air into the drying chamber 1 through the wall pipe 8. The filter screen 9 inside the wall pipe 8 can filter out impurities in the hot air, ensuring that the hot air entering the drying chamber 1 is clean. Through the connection between the wall pipe 8, the drying chamber 1, and the drying fan 7, the wall pipe 8 can be disassembled and the filter screen 9 can be replaced. Then the hot air flows inside the drying chamber 1 to dry the solution, remove moisture or other volatile substances, and further improve the purity and quality of the solution. Finally, the sliding door 12 is pulled to collect the final product.

[0035] Step 3: The feeding bucket box 3, the separation middle box 2 and the drying bottom box 1 are connected by a multi-hole connecting skirt frame 13 and fasteners. This modular connection makes it easy to disassemble after long-term use for cleaning and maintenance. The sealing frame strip 14 and sealing frame groove 15 ensure the sealing effect after the feeding bucket box 3, the separation middle box 2 and the drying bottom box 1 are connected.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-purity lithium hexafluorophosphate production apparatus, characterized in that, include: A drying bottom box (1) is provided with a separation middle box (2) on the top of the drying bottom box (1). A feeding bucket box (3) is provided on the top of the separation middle box (2). Sliding oblique openings (4) are symmetrically opened on both sides of the separation middle box (2). A partition plate (5) is fixedly connected to the lower inner side of the separation middle box (2). A separation mechanism (6) is provided both inside and outside the separation middle box (2). A drying fan (7) is fixedly connected to the lower back of the drying bottom box (1). A wall tube (8) is threadedly connected to the middle back of the drying bottom box (1). A filter screen (9) is fixedly connected inside the wall tube (8). An isolation plate (10) is fixedly connected inside the drying bottom box (1). An inverted V-shaped material discharge plate (11) is fixedly connected to the middle inner side of the feeding bucket box (3). A sliding door (12) is slidably connected to the front of the drying bottom box (1).

2. The high-purity lithium hexafluorophosphate production apparatus according to claim 1, characterized in that, The lower outer side of the feed hopper box (3) is fixedly connected to a perforated connecting skirt frame (13). The upper and lower outer sides of the separation box (2) are also provided with a perforated connecting skirt frame (13) structure. The upper outer side of the drying bottom box (1) is provided with a perforated connecting skirt frame (13) structure.

3. The high-purity lithium hexafluorophosphate production apparatus according to claim 1, characterized in that, The separation mechanism (6) includes: A porous inclined plate (601) and a filter membrane (602) are provided. The porous inclined plate (601) is fixedly connected to the lower end of the inner side of the separation chamber (2), and the filter membrane (602) is laid on the surface of the porous inclined plate (601). The structure includes a support inclined box (603), a motor (604), a lead screw (605), and a slide (606). The support inclined box (603) is fixedly connected to one end of the front of the separation box (2). The motor (604) is fixedly connected to one end of the outer side of the support inclined box (603). The lead screw (605) is rotatably connected to the inner side of the support inclined box (603). The slide (606) is slidably connected to the inside of the support inclined box (603). The components include a second motor (607), a sliding block (608), a rotating shaft (609), a brush roller (610), and a folded waterproof membrane (611). The second motor (607) is fixedly connected to the top of the slide block (606). The sliding block (608) is slidably connected to the inside of the sliding oblique opening (4). The rotating shaft (609) is rotatably connected to the inside of the sliding block (608). The brush roller (610) is fixedly connected to one end of the rotating shaft (609). The folded waterproof membrane (611) is symmetrically fixedly connected to both sides of the sliding block (608).

4. The high-purity lithium hexafluorophosphate production apparatus according to claim 1, characterized in that, A sealing frame strip (14) is fixedly connected to the bottom center of the feeding bucket box (3). A sealing frame groove (15) is opened on the top of the separation box (2). A sealing frame strip (14) structure is also provided in the bottom center of the separation box (2). A sealing frame groove (15) structure is also provided in the top center of the drying bottom box (1). The sealing frame strip (14) and the sealing frame groove (15) are compatible.

5. The high-purity lithium hexafluorophosphate production apparatus according to claim 1, characterized in that, The number of the partition plate (5), the separation mechanism (6) and the isolation plate (10) are all provided in two sets. The partition plate (5) and the isolation plate (10) are movably inserted into each other. The other end of the wall tube (8) is connected to the air outlet pipe of the drying fan (7) through a flange.

6. The high-purity lithium hexafluorophosphate production apparatus according to claim 3, characterized in that, The perforated inclined plate (601) is located at the lower part and is fixedly connected to the partition plate (5). The other end of the lead screw (605) passes through the support inclined box (603) and is fixedly connected to the output end of the motor (604). The slide (606) is threadedly connected to the lead screw (605).

7. The high-purity lithium hexafluorophosphate production apparatus according to claim 3, characterized in that, The other end of the rotating shaft (609) is fixedly connected to the output end of the second motor (607), and the other end of the folded waterproof membrane (611) is fixedly connected to the side end of the sliding oblique opening (4). There are two sets of both the sliding block (608) and the rotating shaft (609).

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