Lithium hexafluorophosphate concentration kettle

Abstract

The utility model relates to the technical field of lithium hexafluorophosphate reaction equipment, in particular to a lithium hexafluorophosphate concentration kettle, which comprises a kettle body, a reaction cavity, a feed port, a discharge port and a stirring device, a lifting pipe is formed at the feed port, and a driving structure for controlling the lifting movement of the lifting pipe is arranged at the top of the kettle body; when the driving structure drives the lifting pipe to lift, the stirring end of the stirring device can be synchronously controlled to move, and the lifting pipe is controlled to lift through the driving structure, so that phosphorus pentafluoride gas can be fed into a solution in the reaction cavity when the phosphorus pentafluoride gas is fed into the reaction cavity, and the reaction efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium hexafluorophosphate reaction equipment, in particular to a lithium hexafluorophosphate concentration kettle. Background Art

[0002] Lithium-ion battery is a pollution-free, long cycle life, high cycle efficiency rechargeable battery, which has been widely used in small mobile power supplies, electric vehicles and electric bicycles.

[0003] Electrolyte lithium salt is the main component of lithium-ion battery electrolyte, and currently lithium hexafluorophosphate is one of the commonly used electrolyte lithium salts.

[0004] In the production process of lithium hexafluorophosphate, phosphorus pentafluoride gas is mainly introduced into hydrogen fluoride and lithium fluoride, and reacted at a specific temperature and pressure to obtain a lithium hexafluorophosphate solution. In this reaction process, a lithium hexafluorophosphate concentrator is usually used. However, the current concentrator has corresponding defects in the intake and stirring of phosphorus pentafluoride:

[0005] 1. During the gas intake, only phosphorus pentafluoride gas can be fed into the concentration reactor, but phosphorus pentafluoride gas cannot be fed into the solution of hydrogen fluoride and lithium fluoride, thus affecting the reaction efficiency.

[0006] 2. During stirring, the agitator is concentrated at a certain position of the concentration kettle and cannot stir the materials at various positions in the concentration kettle, so the stirring effect is not ideal.

[0007] In summary, it is necessary to make necessary improvements to the existing concentration kettle. Utility Model Content

[0008] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a lithium hexafluorophosphate concentration kettle, aiming to solve the problems arising from the above-mentioned background technology.

[0009] The technical solution of the utility model is implemented as follows: a lithium hexafluorophosphate concentration kettle, comprising:

[0010] A kettle body having a reaction chamber;

[0011] A feed inlet is provided on the kettle body and communicated with the reaction chamber;

[0012] A discharge port is provided on the kettle body and is connected to the reaction chamber;

[0013] The stirring device has a stirring end that can move in the reaction chamber and is used to stir the material in the reaction chamber, and is characterized in that: a lifting pipe is formed at the feed inlet, and a driving structure for controlling the lifting movement of the lifting pipe is provided at the top of the kettle body;

[0014] Wherein, when the driving structure drives the lifting pipe to rise and fall, it can synchronously control the movement of the stirring end of the stirring device.

[0015] Preferably, the driving structure comprises:

[0016] A plurality of driving wheels are rotatably connected to the kettle body through a rotating shaft and are arranged at equal intervals in the circumferential direction of the feed inlet;

[0017] A transmission belt, which is connected between the driving wheels;

[0018] Transmission gear, mounted on any rotating shaft;

[0019] The driven gear is rotatably arranged on the top of the kettle body through a limiting structure and meshes with the transmission gear;

[0020] A support plate is connected to the kettle body through a support shaft and is spaced apart from the kettle body;

[0021] The nut is mounted on the support plate and is coaxially arranged with the feed port;

[0022] A screw rod is coaxially arranged with the feed port and cooperates with the nut, and one end of the screw rod passes through the driven gear;

[0023] The lifting tube is installed at one end of the screw and can penetrate into the kettle body from the feed port, and a first limiting rib and a first limiting groove that are mutually adapted and axially extended are provided on the matching surfaces of the screw and the driven gear.

[0024] Preferably, the limiting structure includes:

[0025] The limit block is installed on the kettle body through a column and is located on one side of the driven gear;

[0026] The first limiting area is recessed on one side of the limiting block close to the driven gear;

[0027] Wherein, the driven gear is provided with a first annular slide rail which is coaxially arranged with the driven gear, and the inner wall of the first limiting area is provided with a first slide groove for the first annular slide rail to move.

[0028] Preferably, the stirring device comprises:

[0029] A jet gas is rotatably connected to one end of the lift pipe and forms a jet cavity communicating with the lift pipe;

[0030] An injection check valve is installed on the injection body and communicated with the injection chamber;

[0031] Stirring rods are installed on the circumferential side wall of the jet body and are equidistantly spaced in the circumferential direction;

[0032] A fixed ring is arranged coaxially with the gas jet, and the inner ring wall is connected to one end of the stirring rod;

[0033] Wherein, a driving shaft connected to each driving wheel is arranged in the kettle body, and a lifting structure for supporting and driving the fixed ring to rotate is axially slidably arranged on the driving shaft.

[0034] Preferably, the lifting structure comprises:

[0035] A lifting ring is sleeved on the driving shaft, and an installation cavity is formed on the inner ring wall;

[0036] The lifting gear is arranged in the installation cavity and is coaxially arranged with the driving shaft, and a second limiting rib and a second limiting groove which are mutually adapted and axially extended are provided on the matching surfaces of the lifting gear and the driving shaft;

[0037] The lifting ring is concavely formed on one side close to the fixed ring with a second limiting area connected with the installation cavity and used to support the fixed ring, and a second annular slide rail is provided on the fixed ring, and a second slide groove for the second annular slide rail to move is provided on the inner wall of the second limiting area;

[0038] The outer wall of the fixed ring is provided with a gear ring meshing with the lifting gear.

[0039] The utility model has at least the following beneficial effects:

[0040] 1. When the phosphorus pentafluoride gas is introduced into the reaction chamber through the lifting tube, the driving structure is used to control the lifting of the lifting tube, so that the phosphorus pentafluoride gas can be sent into the solution of the reaction chamber, and during the lifting process of the lifting tube, the position of the exhaust end of the lifting tube can be adjusted, so that the phosphorus pentafluoride gas is evenly distributed in the solution, thereby ensuring the reaction efficiency.

[0041] 2. The stirring device of the utility model can be controlled by the driving structure to rise and fall and rotate, so as to stir the materials at any position (i.e., in the height direction) in the reaction chamber, thereby improving the stirring effect.

[0042] 3. The lifting tube and the stirring device of the utility model share a driving structure, so the driver (such as a motor, a hydraulic cylinder) can be omitted, thereby reducing energy consumption.

[0043] In addition, other advantages of the present invention will be demonstrated in the embodiments of the present invention, thereby making the beneficial effects of the present invention more significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 This is a schematic diagram of the structure of a specific embodiment 1 of the utility model;

[0046] Figure 2 for Figure 1 AA section view in;

[0047] Figure 3 for Figure 2 BB section view in;

[0048] Figure 4 This is a schematic diagram of the structure of a specific embodiment 2 of the utility model;

[0049] Figure 5 for Figure 4 A magnified view of part A in FIG.

[0050] Figure 6 for Figure 5 CC section view in. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] Example 1

[0053] like Figure 1-3 As shown, the utility model discloses a lithium hexafluorophosphate concentration kettle, comprising:

[0054] The kettle body 10 has a reaction chamber 100;

[0055] A feed inlet (consisting of a first feed inlet 11 and a second feed inlet) is provided on the kettle body 10 and communicated with the reaction chamber 100;

[0056] The discharge port 12 is provided on the kettle body 10 and communicated with the reaction chamber 100;

[0057] In this embodiment, control valves 13 are provided at both the feed port 11 and the discharge port 12 .

[0058] In this embodiment, the reaction chamber 100 is further provided with a stirring device, which has a stirring end 5 that can move in the reaction chamber and is used to stir the material in the reaction chamber 100 .

[0059] In this embodiment, a lifting pipe 2 is formed at the second feed port, and a driving structure for controlling the lifting and lowering movement of the lifting pipe 2 is provided on the top of the kettle body 10;

[0060] Wherein, when the driving structure drives the lifting pipe 2 to rise and fall, it can synchronously control the movement of the stirring end of the stirring device.

[0061] In this embodiment: the driving structure includes:

[0062] A plurality of driving wheels 30 are rotatably connected to the kettle body 10 via a rotating shaft 31 and are arranged at equal intervals in the circumferential direction around the second feed port (i.e., the lifting pipe, the same below);

[0063] A transmission belt 32 is connected between the driving wheels 30;

[0064] A transmission gear 33 is mounted on any rotating shaft 31;

[0065] The driven gear 34 is rotatably disposed on the top of the kettle body 10 through a limiting structure and meshes with the transmission gear 33;

[0066] The support plate 35 is connected to the kettle body 10 through the support shaft 36 and is spaced apart from the kettle body 10;

[0067] The nut 37 is mounted on the support plate 35 and is coaxially arranged with the second feed port;

[0068] The screw 38 is coaxially arranged with the second feed port and cooperates with the nut 37, and one end of the screw passes through the driven gear 34;

[0069] Among them, the lifting tube 2 is installed at one end of the screw 38, and can penetrate into the kettle body 10 from the second feed port, and a first limiting rib 39a and a first limiting groove 39b that are mutually adapted and axially extended are provided on the matching surfaces of the screw 38 and the driven gear 34. The first limiting rib 39a is provided on the outer wall of the screw 38 and extends axially, and the first limiting groove 39b is provided on the matching inner wall of the driven gear 34 and the screw 38 and extends axially and penetrates the driven gear 34.

[0070] In this embodiment, the support shaft 36 is provided with a wheel seat 36a for supporting the driving wheel 30 (the driving wheel is supported by the wheel seat 36a, and the wheel seat 36a is connected to the kettle body 10 through the support shaft 36, so the driving wheel 30 is rotatably connected to the kettle body with the help of the wheel seat 36), and the support shaft 36 is also provided with a support seat 36b for installing a limiting structure (the limiting structure is supported by the support seat 36b, and the driven gear 34a is supported by the limiting structure, so the driven gear is rotatably arranged on the top of the kettle body with the help of the support seat 36b and the limiting structure).

[0071] In this embodiment: the limiting structure includes:

[0072] The limit block 40 is installed on the kettle body through the column 41 and is located on one side of the driven gear;

[0073] A first limiting area 42 is recessed from one side of the limiting block 40 close to the driven gear 34;

[0074] The driven gear 34 is provided with a first annular slide rail 34 a coaxially arranged with the driven gear 34 , and the inner wall of the first limiting area 42 is provided with a first slide groove 42 a for the first annular slide rail 34 a to move.

[0075] In this embodiment, the stirring end 5 (stirrer) of the stirring device is connected to the rotating shaft 31 and is located in the reaction chamber 100 .

[0076] In this embodiment, the driver of the driving structure can be a motor or a hydraulic cylinder. If it is a motor, the motor shaft of the motor is connected to any driving wheel. If it is a hydraulic cylinder, the piston shaft of the hydraulic cylinder is connected to the top of the screw. Since the driver of this embodiment is not limited to one type, it is not limited in this embodiment, so it is not shown in the figure. As for the driving principle of the motor or the driving principle of the hydraulic cylinder, it is a relatively mature existing technology, so it will not be described in detail in this embodiment.

[0077] refer to Figure 1-3 The principle of this embodiment is (taking the driver as a hydraulic cylinder as an example):

[0078] The solutions of hydrogen fluoride and lithium fluoride can be added to the reaction chamber through the first feed port, and the phosphorus pentafluoride gas can be delivered into the reaction chamber through the lifting tube (a one-way valve is provided at the bottom end). When delivering gas, the hydraulic cylinder controls the screw to descend. Since the screw cooperates with the nut on the support plate, the screw rotates while descending, and the driven gear is controlled to rotate by the cooperation of the first limiting rib and the first limiting groove. When the driven gear rotates, the transmission gear meshing with the driven gear also rotates accordingly, and controls the rotation of the driving wheel. Finally, the driving wheel and the rotating shaft are used to control the rotation of the agitator to stir the material in the reaction chamber.

[0079] In this embodiment, when the screw is descending, the lifting tube is also controlled to descend, so that the height position of the gas outlet end at the bottom of the lifting tube can be changed, thereby delivering phosphorus pentafluoride gas into the solution, thereby improving the reaction efficiency.

[0080] It should be noted that the first limiting rib and the second limiting groove arranged between the driven gear and the screw rod can enable relative axial sliding between the screw rod and the driven gear, and can drive the driven gear to rotate when the screw rod rotates, and the limiting structure can limit the movement of the driven gear in height position, and the first sliding groove in the limiting structure and the first annular sliding rail on the driven gear can enable the driven gear to rotate smoothly. Therefore, the limiting structure of this embodiment supports the driven gear and allows the driven gear to rotate.

[0081] Embodiment 2 is different from Embodiment 1 in that

[0082] like Figure 4-6 As shown, in this embodiment: the stirring device includes:

[0083] The jet body 60 is rotatably connected to one end of the lift pipe 2 and forms a jet chamber 61 communicating with the lift pipe 2;

[0084] The jet check valve 62 is installed on the jet body 60 and communicates with the jet chamber 61;

[0085] Stirring rods 63 are mounted on the circumferential side wall of the jet body 60 and are equidistantly spaced in the circumferential direction;

[0086] The fixing ring 64 is coaxially arranged with the spray body 60, and the inner ring wall is connected to one end of the stirring rod 63;

[0087] The kettle body 10 is provided with a driving shaft 65 connected to each driving wheel 30 (or rotating shaft 31 ), and a lifting structure for supporting and driving the fixing ring 64 to rotate is axially slidably provided on the driving shaft 65 .

[0088] In this embodiment: the lifting structure includes:

[0089] The lifting ring 70 is sleeved on the driving shaft 65, and the inner wall of the lifting ring 70 is formed with a mounting cavity 71;

[0090] The lifting gear 72 is arranged in the installation cavity 71 and is coaxially arranged with the driving shaft 65, and a second limiting rib 73 and a second limiting groove 74 that are mutually adapted and axially extended are provided on the matching surfaces of the lifting gear 72 and the driving shaft 65;

[0091] The lifting ring 70 is concavely formed with a second limiting area 75 on one side close to the fixing ring 64, which is connected with the installation cavity 71 and used to support the fixing ring 64. A second annular slide rail 76 is provided on the fixing ring 64, and a second slide groove 77 for the second annular slide rail 76 to move is provided on the inner wall of the second limiting area 75.

[0092] The outer wall of the fixing ring 64 is provided with a gear ring 78 meshing with the lifting gear 72 .

[0093] refer to Figure 4-6 , the principle of this embodiment is:

[0094] When the lifting tube is lifted or lowered (the principle is referred to Example 1), the jet gas is lifted or lowered accordingly, and the jet gas drives the fixed ring to be lifted or lowered through the stirring rod, and the fixed ring is used to drive the lifting ring to be lifted or lowered. When the lifting ring is lifted or lowered, the lifting gear in the mounting cavity of the lifting ring is also lifted or lowered accordingly. Moreover, since the driving structure can control the rotation of the transmission wheel, the lifting gear is controlled to rotate through the second limiting rib and the second limiting groove during the lifting process, and the gear ring is driven to rotate at the same time. Therefore, the jet gas and the stirring rod rotate during the lifting process and stir the material in the reaction chamber. The stirring rod of this embodiment can be lifted or lowered in the reaction chamber, so the material in the reaction chamber can be fully stirred to ensure the reaction efficiency.

[0095] It should be noted that the phosphorus pentafluoride gas in the lift pipe can be sent into the reaction chamber through the jet check valve after the jet gas is sent into the reaction chamber.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium hexafluorophosphate concentration kettle, comprising: A kettle body (10) having a reaction chamber (100); A feed inlet is provided on the kettle body (10) and is connected to the reaction chamber (100); A discharge port (12) is provided on the kettle body (10) and is communicated with the reaction chamber (100); The stirring device has a stirring end that can move in a reaction chamber (100) and is used to stir the material in the reaction chamber (100), and is characterized in that: a lifting pipe (2) is formed at the feed inlet, and a driving structure for controlling the lifting movement of the lifting pipe (2) is provided at the top of the kettle body (10); Wherein, when the driving structure drives the lifting pipe (2) to rise and fall, it can synchronously control the movement of the stirring end of the stirring device.

2. A lithium hexafluorophosphate concentrating kettle according to claim 1, characterized in that: The driving structure comprises: A plurality of driving wheels (30) are rotatably connected to the kettle body (10) via a rotating shaft (31) and are arranged at equal intervals in the circumferential direction of the feed inlet; A transmission belt (32) is transmission-connected between the driving wheels (30); A transmission gear (33) is mounted on any rotating shaft (31); A driven gear (34) is rotatably disposed on the top of the kettle body (10) through a limiting structure and meshes with the transmission gear (33); A support plate (35) is connected to the kettle body (10) via a support shaft (36) and is spaced apart from the kettle body (10); A nut (37) is mounted on the support plate (35) and is coaxially arranged with the feed port; A screw (38) is coaxially arranged with the feed port and cooperates with the nut (37), and one end of the screw passes through the driven gear (34); The lifting tube (2) is installed at one end of the screw (38) and can penetrate into the kettle body (10) from the feed port, and a first limiting rib (39a) and a first limiting groove (39b) which are mutually adapted and axially extended are provided on the matching surfaces of the screw (38) and the driven gear (34).

3. A lithium hexafluorophosphate concentrating kettle according to claim 2, characterized in that: The limiting structure comprises: A limit block (40) is mounted on the kettle body (10) through a column (41) and is located on one side of the driven gear (34); A first limiting area (42) is recessed from a side of the limiting block (40) close to the driven gear (34); The driven gear (34) is provided with a first annular slide rail (34a) coaxially arranged with the driven gear (34), and the inner wall of the first limiting area (42) is provided with a first slide groove (42a) for the first annular slide rail (34a) to move.

4. A lithium hexafluorophosphate concentrating kettle according to claim 2 or 3, characterized in that: The stirring device comprises: A jet body (60) is rotatably connected to one end of the lifting pipe (2) and is formed with a jet chamber (61) communicating with the lifting pipe (2); An injection check valve (62) is installed on the injection body (60) and communicated with the injection chamber (61); Stirring rods (63) are mounted on the circumferential side wall of the jet body (60) and are equidistantly spaced in the circumferential direction; A fixing ring (64) is coaxially arranged with the spray body (60), and the inner wall of the fixing ring is connected to one end of the stirring rod (63); A driving shaft (65) connected to each driving wheel (30) is provided in the kettle body (10), and a lifting structure for supporting and driving the fixed ring (64) to rotate is axially slidably provided on the driving shaft (65).

5. A lithium hexafluorophosphate concentrating kettle according to claim 4, characterized in that: The lifting structure comprises: A lifting ring (70) is sleeved on the driving shaft (65), and an inner ring wall is formed with a mounting cavity (71); The lifting gear (72) is arranged in the installation cavity (71) and is coaxially arranged with the driving shaft (65), and a second limiting rib (73) and a second limiting groove (74) which are mutually adapted and extend axially are provided on the matching surfaces of the lifting gear (72) and the driving shaft (65); The lifting ring (70) is recessed on one side close to the fixed ring (64) to form a second limiting area (75) which is connected to the installation cavity (71) and is used to support the fixed ring (64), and a second annular slide rail (76) is provided on the fixed ring (64), and a second slide groove (77) for the second annular slide rail (76) to move is provided on the inner wall of the second limiting area (75); The outer wall of the fixing ring (64) is provided with a gear ring (78) meshing with the lifting gear (72).

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