Lithium hexafluorophosphate crystallization kettle

Abstract

The utility model discloses a lithium hexafluorophosphate crystallization kettle, which belongs to the technical field of lithium hexafluorophosphate crystallization kettles and comprises a treatment kettle, the lower end of the surface of the treatment kettle is communicated with a connecting pipe, the top end of the treatment kettle is communicated with a feeding pipe, and the lower end of the surface of the connecting pipe is communicated with a discharging pipe and an anti-disassembly mechanism. The anti-disassembly mechanism comprises a liquid discharge pipe communicated with the lower end of the surface of the treatment kettle, and the upper end of the surface of a connecting pipe is communicated with a crimping pipe and an exhaust pipe. According to the lithium hexafluorophosphate crystallization kettle, nitrogen is blown into the discharging pipe, the connecting pipe, the treatment kettle and the feeding pipe through the ingress pipe, so that the interior of the lithium hexafluorophosphate crystallization kettle is safely cleaned, and compared with an existing mode that cleaning is conducted after a pipeline communicating with the discharging pipe and the feeding pipe is disassembled, potential safety hazards are easily increased, and inconvenience is caused; according to the mode, splitting is not needed during cleaning, it is guaranteed that the interior of the lithium hexafluorophosphate crystallization kettle is cleaned more conveniently, and potential safety hazards are reduced.

Description

Technical Field

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

[0002] Lithium hexafluorophosphate (LFP) is an important electrolyte material for lithium-ion batteries. Its preparation and purification are key steps in the production of lithium-ion batteries. A crystallization reactor is a device used to crystallize and separate LFP, typically used to separate and purify LFP crystals from solutions.

[0003] When using the lithium hexafluorophosphate crystallization kettle, flange connection is usually used to connect the feed pipe and discharge pipe on the crystallization kettle to the corresponding pipes respectively. After the material is fed in and out, the corresponding pipes on the feed pipe and discharge pipe are removed, and the crystallization kettle, feed pipe and discharge pipe can be cleaned to ensure the quality of lithium hexafluorophosphate crystals produced by the crystallization kettle next time.

[0004] After the corresponding pipes on the feed pipe and the discharge pipe are removed, it is easy to cause the residual materials or toxic gases in the crystallization kettle to be exposed to the air, thereby increasing the safety hazard.

[0005] Based on this, the utility model designs a lithium hexafluorophosphate crystallization kettle to solve the above problems. Utility Model Content

[0006] In view of the above shortcomings of the prior art, the utility model provides a lithium hexafluorophosphate crystallization kettle.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The lithium hexafluorophosphate crystallization kettle includes a treatment kettle, the lower end of the surface of the treatment kettle is connected to a connecting pipe, the top of the treatment kettle is connected to a feed pipe, the lower end of the surface of the connecting pipe is connected to a discharge pipe, and an anti-dismantling mechanism, the anti-dismantling mechanism includes a drain pipe connected to the lower end of the surface of the treatment kettle, the upper end of the surface of the connecting pipe is connected to a compression pipe and an exhaust pipe, one end of the connecting pipe is connected to an inlet pipe, the inner wall of the inlet pipe is provided with a movable hole, the inner wall of the movable hole is fixedly connected to a slide, the inner wall of the slide is slidably connected to a block, the end of the block is fixedly connected to a spring, and the other end of the spring is fixedly connected to the inner wall of the slide.

[0009] Furthermore, the inner walls of the feed pipe, discharge pipe, outlet pipe and exhaust pipe are rotatably connected to a block, and the surfaces of the feed pipe, discharge pipe, outlet pipe and exhaust pipe are fixedly connected to a first servo motor, and the output shaft of the first servo motor is fixedly connected to one end of the block.

[0010] Furthermore, the inner walls of the feed pipe, the liquid discharge pipe, the discharge pipe and the exhaust pipe are all fixedly connected with elastic rings, and the surface of the stopper contacts the surface of the elastic ring.

[0011] Furthermore, a sliding block is fixedly connected to the upper end of the surface of the stopper, and arc blocks are fixedly connected to the surfaces of the feed pipe, the liquid discharge pipe, the discharge pipe and the exhaust pipe.

[0012] Furthermore, the inner wall of the movable hole is concave in a truncated cone shape, and the surface of the blocking block is truncated cone-shaped.

[0013] Furthermore, an auger is provided inside the connecting pipe, and one end of the auger is fixedly connected to a second servo motor.

[0014] Furthermore, the inner bottom wall of the processing kettle is fixedly connected to a protection frame, one end of the auger is rotatably connected to the inner wall of the protection frame, and the surface of the second servo motor is fixedly connected to the inner wall of the protection frame.

[0015] Furthermore, the inner wall of the connecting pipe is fixedly connected to a support block, and the surface of the auger is rotatably connected to the inner wall of the support block. Beneficial effects

[0016] Through the introduction pipe, nitrogen is blown into the discharge pipe, the connecting pipe, the treatment kettle and the feed pipe through the introduction pipe, thereby achieving safe cleaning of the lithium hexafluorophosphate crystallization kettle. Compared with the existing method of separating the pipes connecting the discharge pipe and the feed pipe and then cleaning them, which easily increases safety hazards and is inconvenient, this method does not require separation during cleaning, ensuring that cleaning of the lithium hexafluorophosphate crystallization kettle is more convenient and reduces safety hazards;

[0017] The first servo motor and the block are used to automatically block the inside of the discharge pipe, exhaust pipe, feed pipe and drain pipe, thereby automatically controlling the state of discharge, exhaust gas discharge, feed and acid liquid discharge, thereby improving the safety of using the lithium hexafluorophosphate crystallization kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0019] Figure 1 It is a three-dimensional diagram of the main structure of the lithium hexafluorophosphate crystallization kettle of the present invention;

[0020] Figure 2This is a cross-sectional view of a treatment tank in a lithium hexafluorophosphate crystallization kettle of the present invention;

[0021] Figure 3 This is a three-dimensional diagram of the anti-disassembly mechanism in the lithium hexafluorophosphate crystallization kettle of the present invention;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] The numbers in the figure represent:

[0024] 1. Processing kettle; 2. Connecting pipe; 3. Discharge pipe; 4. Anti-dismantling mechanism; 41. Drain pipe; 42. Press tube; 43. Exhaust pipe; 44. Inlet pipe; 45. Stopper; 46. Movable hole; 47. Block; 48. Slide; 49. Spring; 410. First servo motor; 411. Elastic ring; 412. Slider; 413. Arc block; 414. Second servo motor; 415. Auger; 416. Protective frame; 417. Support block; 5. Feed pipe. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] In some embodiments, please refer to the appendix of the specification. Figure 1-4 , a lithium hexafluorophosphate crystallization kettle includes a treatment kettle 1, the lower end of the surface of the treatment kettle 1 is connected to a connecting pipe 2, the top of the treatment kettle 1 is connected to a feed pipe 5, the lower end of the surface of the connecting pipe 2 is connected to a discharge pipe 3, an anti-dismantling mechanism 4, the anti-dismantling mechanism 4 includes a drain pipe 41 connected to the lower end of the surface of the treatment kettle 1, the upper end of the surface of the connecting pipe 2 is connected to a compression pipe 42 and an exhaust pipe 43, one end of the connecting pipe 2 is connected to an inlet pipe 44, the inner wall of the inlet pipe 44 is provided with a movable hole 46, the inner wall of the movable hole 46 is fixedly connected to a slide 48, the inner wall of the slide 48 is slidably connected to a block 47, the end of the block 47 is fixedly connected to a spring 49, and the other end of the spring 49 is fixedly connected to the inner wall of the slide 48.

[0028] The inner wall of the processing kettle 1 is provided with a hot and cold coal coil, both ends of the hot and cold coal coil pass through and extend out of the inner wall of the processing kettle 1. The top of the processing kettle 1 is fixedly connected to a third servo motor, and the output shaft of the third servo motor is fixedly connected to a stirring shaft, and the surface of the stirring shaft is rotatably connected to the inner wall of the processing kettle 1.

[0029] In the embodiment of the present invention, when lithium hexafluorophosphate needs to be prepared, the feed pipe 5, the discharge pipe 3, the hot and cold coal coils, the drain pipe 41, the pressure pipe 42, the exhaust pipe 43 and the introduction pipe 44 are respectively connected to the corresponding pipes through flanges. The working process of the processing kettle 1 is operated by the control panel, so that the feeding system automatically delivers the lithium hexafluorophosphate solution or other required materials to the processing kettle 1 through the feed pipe 5, the temperature control system automatically delivers the coolant to the hot and cold coal coils to cool the processing kettle 1, and automatically delivers the mother liquor to the introduction pipe 44. The mother liquor pushes the block 47 to move during the flow in the introduction pipe 44, and the block As block 47 moves, it compresses spring 49 and opens movable hole 46, allowing the mother liquor to be transported into processing kettle 1 through the open movable hole 46 and connecting pipe 2. This automatically activates the third servo motor, and its output shaft rotates to drive the stirring shaft to stir the material in processing kettle 1. Because the mother liquor contains dissolved lithium hexafluorophosphate, it provides the necessary ion concentration for crystal growth. By cooling or evaporating the mother liquor, the lithium hexafluorophosphate reaches a supersaturated state, thereby promoting crystal precipitation. When drying is required, the temperature control system introduces hot water into the hot and cold coal coils to increase the temperature in processing kettle 1, thereby heating the wet material and evaporating the solvent. At this time, the stirring shaft stirs the material in processing kettle 1, causing the material to continuously contact the inner wall of processing kettle 1, thereby drying the material and obtaining lithium hexafluorophosphate of higher purity.

[0030] During the crystallization process of lithium hexafluorophosphate, after the crystals are precipitated from the solution, some uncrystallized acidic liquid, such as sulfuric acid, hydrochloric acid or other acidic substances, may remain in the treatment kettle 1. At this time, the drain pipe 41 is opened to discharge the residual acidic liquid in the treatment kettle 1 into the designated container through the drain pipe 41.

[0031] The waste gas generated in the treatment kettle 1 is guided into the exhaust pipe 43 through the connecting pipe 2 and then guided to a suitable location through the exhaust pipe 43 for treatment.

[0032] After the material in the treatment kettle 1 is discharged, nitrogen is injected into the inlet pipe 44. The nitrogen pushes the block 47 to move in the movable hole 46, so that the movable hole 46 is unblocked, and then the nitrogen is used to purge the residual material in the connecting pipe 2, the discharge pipe 3, the treatment kettle 1 and the feed pipe 5. During the purge process, the nitrogen can take away the residual harmful gases and impurities, reducing the risk of operators being exposed to harmful substances, thereby ensuring the cleanliness of the equipment, avoiding the inconvenience of disassembling and cleaning the feed pipe 5, the discharge pipe 3 and the corresponding pipelines, and thus avoiding the residual materials or toxic gases in the treatment kettle 1 from being exposed to the air.

[0033] In the embodiment of the present invention, nitrogen is blown into the outlet pipe 3, the connecting pipe 2, the treatment kettle 1 and the feed pipe 5 through the inlet pipe 44, thereby achieving safe and convenient cleaning of the lithium hexafluorophosphate crystallization kettle.

[0034] In some embodiments, as Figure 3-4 As shown, as a preferred embodiment of the present invention, the inner walls of the feed pipe 5, the discharge pipe 41, the discharge pipe 3, and the exhaust pipe 43 are all rotatably connected to a stopper 45. The surfaces of the feed pipe 5, the discharge pipe 41, the discharge pipe 3, and the exhaust pipe 43 are all fixedly connected to a first servo motor 410. The output shaft of the first servo motor 410 is fixedly connected to one end of the stopper 45. The inner walls of the feed pipe 5, the discharge pipe 41, the discharge pipe 3, and the exhaust pipe 43 are all fixedly connected to an elastic ring 411. The surface of the stopper 45 contacts the surface of the elastic ring 411. The upper end of the surface of the stopper 45 is fixedly connected to a slider 412. The surfaces of the feed pipe 5, the discharge pipe 41, the discharge pipe 3, and the exhaust pipe 43 are all fixedly connected to an arc block 413. The elastic ring 411 is a rubber component.

[0035] In the embodiment of the present invention, when discharge is required, the first servo motor 410 on the discharge pipe 3 is automatically turned on by operating the control panel. The output shaft of the first servo motor 410 rotates, driving the slider 412 and the stopper 45 to move in a circular motion. The slider 412 moves and contacts the end of the arc block 413, and the first servo motor 410 is automatically turned off, causing the stopper 45 to flip to a vertical position. At this time, the discharge pipe 3 is unobstructed, and the material in the processing kettle 1 is discharged to the corresponding position through the connecting pipe 2 and the discharge pipe 3. According to the above method, when feeding, exhaust gas or acidic liquid are required, the corresponding first servo motor 410 is automatically turned on in sequence.

[0036] In the embodiment of the present invention, the first servo motor 410 and the block 45 are used to automatically block the inside of the discharge pipe 3, the exhaust pipe 43, the feed pipe 5 and the drain pipe 41, thereby automatically controlling the state of discharging, exhaust gas discharge, feeding and acid liquid discharge, thereby improving the safety of using the lithium hexafluorophosphate crystallization kettle. The elastic ring 411 is used to tightly adhere to the block 45, thereby ensuring the blocking effect of the block 45.

[0037] In some embodiments, as Figure 3 As shown in FIG. 4 , as a preferred embodiment of the present invention, the inner wall of the movable hole 46 is concave in a truncated cone shape, and the surface of the blocking block 47 is truncated cone-shaped.

[0038] In some embodiments, as Figure 3As shown, as the preferred embodiment of the utility model, the inside of the connecting pipe 2 is provided with an auger 415, one end of the auger 415 is fixedly connected with a second servo motor 414, the inner bottom wall of the processing kettle 1 is fixedly connected with a protective frame 416, one end of the auger 415 is rotatably connected to the inner wall of the protective frame 416, the surface of the second servo motor 414 is fixedly connected to the inner wall of the protective frame 416, the inner wall of the connecting pipe 2 is fixedly connected with a supporting block 417, and the surface of the auger 415 is rotatably connected to the inner wall of the supporting block 417.

[0039] In the embodiment of the utility model, through the operation control panel, the second servo motor 414 is automatically started, the output shaft of the second servo motor 414 rotates and drives the auger 415 to rotate, and the auger 415 rotates and rapidly transports the material in the processing kettle 1 to the discharge pipe 3 by the spiral conveying mode.

[0040] In the embodiment of the utility model, through the auger 415 and the second servo motor 414, the material in the processing kettle 1 is rapidly guided and transported to the discharge pipe 3, and the material retention condition is avoided.

[0041] It should be noted that the first servo motor 410, the second servo motor 414, the third servo motor, the processing kettle 1, the auger 415 and the spring 49 in the above description are all relatively mature devices in prior art, and the specific model can be selected according to actual needs, and the power supply of the first servo motor 410, the second servo motor 414 and the third servo motor can be built-in power supply or commercial power supply, and the specific power supply mode is selected as needed, which will not be repeated here.

[0042] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A lithium hexafluorophosphate crystallization kettle, comprising a treatment kettle (1), wherein the lower end of the surface of the treatment kettle (1) is connected to a connecting pipe (2), the top end of the treatment kettle (1) is connected to a feed pipe (5), and the lower end of the surface of the connecting pipe (2) is connected to a discharge pipe (3), characterized in that: An anti-dismantling mechanism (4) includes a drain pipe (41) connected to the lower end of the surface of the treatment kettle (1), the upper end of the surface of the connecting pipe (2) is connected to a compression pipe (42) and an exhaust pipe (43), one end of the connecting pipe (2) is connected to an introduction pipe (44), a movable hole (46) is opened on the inner wall of the introduction pipe (44), a slide (48) is fixedly connected to the inner wall of the movable hole (46), a block (47) is slidably connected to the inner wall of the slide (48), an end of the block (47) is fixedly connected to a spring (49), and the other end of the spring (49) is fixedly connected to the inner wall of the slide (48).

2. The lithium hexafluorophosphate crystallization kettle according to claim 1, characterized in that The inner walls of the feed pipe (5), the liquid discharge pipe (41), the discharge pipe (3) and the exhaust pipe (43) are all rotatably connected to a stopper (45); the surfaces of the feed pipe (5), the liquid discharge pipe (41), the discharge pipe (3) and the exhaust pipe (43) are all fixedly connected to a first servo motor (410); and the output shaft of the first servo motor (410) is fixedly connected to one end of the stopper (45).

3. The lithium hexafluorophosphate crystallization kettle according to claim 2, characterized in that The inner walls of the feed pipe (5), the liquid discharge pipe (41), the discharge pipe (3), and the exhaust pipe (43) are all fixedly connected with an elastic ring (411), and the surface of the stopper (45) contacts the surface of the elastic ring (411).

4. The lithium hexafluorophosphate crystallization kettle according to claim 2, characterized in that The upper end of the surface of the stopper (45) is fixedly connected to a slider (412), and the surfaces of the feed pipe (5), the liquid discharge pipe (41), the discharge pipe (3), and the exhaust pipe (43) are all fixedly connected to an arc block (413).

5. The lithium hexafluorophosphate crystallization kettle according to claim 1, characterized in that The inner wall of the movable hole (46) is concave in a truncated cone shape, and the surface of the blocking block (47) is truncated cone-shaped.

6. The lithium hexafluorophosphate crystallization kettle according to claim 1, characterized in that An auger (415) is provided inside the connecting pipe (2), and one end of the auger (415) is fixedly connected to a second servo motor (414).

7. The lithium hexafluorophosphate crystallization kettle according to claim 6, characterized in that The inner bottom wall of the processing kettle (1) is fixedly connected to a protective frame (416), one end of the auger (415) is rotatably connected to the inner wall of the protective frame (416), and the surface of the second servo motor (414) is fixedly connected to the inner wall of the protective frame (416).

8. The lithium hexafluorophosphate crystallization kettle according to claim 6, characterized in that The inner wall of the connecting pipe (2) is fixedly connected to a support block (417), and the surface of the auger (415) is rotatably connected to the inner wall of the support block (417).

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