Drying device for lithium hydroxide

Abstract

The utility model relates to the technical field of drying equipment, in particular to a drying device for lithium hydroxide. The device comprises a stirring tank, a stirring mechanism and a plurality of crushing mechanisms, the stirring mechanism comprises a first driving part, a rotating shaft and a plurality of stirring rods, the fixed end of the first driving part is fixedly mounted at the top of the stirring tank, the output end of the first driving part penetrates through the top of the stirring tank to be connected with one end of the rotating shaft, the rotating shaft extends vertically, and the other end of the rotating shaft is located at the bottom of the stirring tank; the plurality of stirring rods are vertically connected to the outer wall of the rotating shaft; and a plurality of crushing mechanisms are installed on each stirring rod in the length direction of the stirring rod, each crushing mechanism comprises a crushing wheel and a second driving part, the second driving parts are installed in the stirring rods, and the output ends of the second driving parts are connected with the crushing wheels. By arranging the stirring mechanism and the crushing mechanism, the problem of internal moisture residue caused by caking is reduced, and the preparation efficiency of lithium hydroxide powder is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying equipment technical field especially relates to a drying device for lithium hydroxide. BACKGROUND

[0002] Lithium hydroxide is an inorganic compound with the chemical formula LiOH. It is a white crystalline powder that dissolves in water and is slightly soluble in ethanol. It has strong alkaline properties, with a pH of about 14 in a 1 mol / L solution. It is mainly used to prepare lithium salts, lithium-based lubricating grease, electrolyte for alkaline batteries, lithium bromide refrigerator absorbing liquid, and carbon dioxide absorbent.

[0003] Currently, lithium hydroxide is typically prepared by placing lithium hydroxide monohydrate powder in a suitable container and heating it in a laboratory or industrial environment. Generally, the dehydration temperature of lithium hydroxide monohydrate powder is between 100°C and 150°C. After dehydration is complete, the material is allowed to cool naturally to room temperature. At this point, anhydrous lithium hydroxide powder is obtained.

[0004] However, current drying devices for lithium hydroxide typically use a motor to drive a stirring shaft to rotate, causing the stirring assembly to stir the lithium hydroxide monohydrate powder in the tank. This ensures uniform heating of the lithium hydroxide monohydrate powder. However, since lithium hydroxide monohydrate powder releases steam during drying, it is prone to sticking together to form clumps. The stirring rod has limited effect and cannot break up the clumps during stirring, significantly reducing the efficiency of lithium hydroxide production.

[0005] Therefore, there is a need for a drying device for lithium hydroxide that can break up lithium hydroxide monohydrate clumps. SUMMARY

[0006] (I) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present utility model provides a drying device for lithium hydroxide, which solves the technical problem that the existing drying device for lithium hydroxide cannot break up the sticking lithium hydroxide monohydrate during stirring, reducing the efficiency of lithium hydroxide production.

[0008] (II) Technical solutions

[0009] To achieve the above-mentioned purposes, the main technical solutions adopted by the present utility model include:

[0010] The utility model provides a kind of for lithium hydroxide drying device, including stirring tank, stirring mechanism and multiple crushing mechanism;The stirring mechanism includes first driving part, shaft and multiple stirring rod, the fixed end of the first driving part is fixedly installed in the top of the stirring tank, the output end of the first driving part passes through the top of the stirring tank and is connected with the one end of the shaft, the shaft extends along vertical and the other end of the shaft is located in the bottom of the stirring tank, multiple the stirring rod is connected in the outer wall of the shaft, the first driving part can drive the shaft rotation, to be able to drive multiple the stirring rod stirring the lithium hydroxide monohydrate powder contained in the stirring tank;Multiple the crushing mechanism is mounted on each the stirring rod along its length direction, the crushing mechanism includes crushing wheel and second driving part, the second driving part is installed in the inside of the stirring rod, the output end of the second driving part is connected with the crushing wheel, the second driving part can drive the crushing wheel rotation, to scatter the lithium hydroxide monohydrate powder that has been caked.

[0011] Preferably, the crushing wheel includes a rotating seat and multiple crushing blades; the rotating seat is connected with the driving end of the second driving part, and multiple the crushing blades are fixedly arranged on the outer wall of the rotating seat in a circumferential array. The second driving part can drive the rotating seat to rotate, so as to drive multiple the crushing blades to rotate with the rotating seat, thereby scattering the lithium hydroxide monohydrate powder that has been caked.

[0012] Preferably, the end of the stirring rod away from the shaft is in an arc shape, and the arc shape is recessed towards the rotation direction of the stirring rod. The end of the arc shape away from the shaft is in sliding fit with the inner wall of the stirring tank.

[0013] Preferably, the stirring tank includes an outer tank and an inner tank. The outer tank is sleeved outside the inner tank, and the top and bottom of the outer tank are connected with the top and bottom of the inner tank, respectively. A layer is formed between the inner wall of the outer tank and the outer wall of the inner tank, and a heater in a spiral shape around the inner tank is arranged in the layer to heat the lithium hydroxide monohydrate powder in the inner tank.

[0014] Preferably, the inner tank includes an upper tank body and a lower tank body. The bottom of the upper tank body is connected with the top of the lower tank body, and the upper tank body is in communication with the lower tank body. The upper tank body is in a cylindrical shape, and the lower tank body is in an inverted circular truncated cone shape. Multiple crushing fins are arranged on the inner wall of the lower tank body, and multiple the crushing fins are arranged in a circumferential array around the axis of the lower tank body.

[0015] Preferably, the stirring mechanism further comprises a mounting frame and a plurality of stirring blades; the mounting frame is mounted on the bottom of the upper tank body, the end of the rotating shaft away from the first driving member penetrates through the mounting frame and is arranged on the bottom of the lower tank body, and a space is formed between the rotating shaft and the bottom wall of the lower tank body, and the rotating shaft is rotatably connected with the mounting frame; a plurality of the stirring blades are arranged below the mounting frame and in the lower tank body, and the plurality of stirring blades are vertically and circumferentially arranged on the outer wall of the rotating shaft along the axis of the rotating shaft, and the lengths of the plurality of stirring blades gradually decrease from top to bottom.

[0016] Preferably, the outer wall of the outer tank is horizontally provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is arranged at the top of the outer tank, and the liquid outlet pipe is arranged at the bottom of the outer tank; the heat conducting oil or hot water can enter the interlayer from the liquid inlet pipe and be discharged from the liquid outlet pipe.

[0017] Preferably, the stirring tank further comprises a feeding pipe and a discharging pipe; the feeding pipe is mounted on the top of the stirring tank and communicates with the stirring tank, and is used for adding lithium hydroxide monohydrate powder into the stirring tank; the discharging pipe is mounted on the bottom of the stirring tank through a stop valve, and is used for discharging lithium hydroxide monohydrate powder.

[0018] Preferably, the feeding pipe comprises a cover, a pipe body and a spiral channel; the pipe body is fixedly mounted on the top of the stirring tank and communicates with the stirring tank, the spiral channel is arranged in the pipe body, and the outer wall of the spiral channel is connected with the inner wall of the pipe body; lithium hydroxide monohydrate powder can enter the stirring tank through the spiral channel, so as to slow down the falling speed of the lithium hydroxide monohydrate powder; and the cover is detachably mounted on the top of the pipe body, so as to close the pipe body.

[0019] Preferably, the stirring tank further comprises a vacuum air extraction device; the vacuum air extraction device comprises a filter, an air extraction pipe and a vacuum pump; the filter is arranged in the stirring tank and is used for filtering lithium hydroxide monohydrate powder; the top of the filter communicates with one end of the air extraction pipe, and the other end of the air extraction pipe is connected with the vacuum pump; and the vacuum pump can extract air, so that the steam released after the lithium hydroxide monohydrate powder is dried is sequentially discharged through the filter, the air extraction pipe and the vacuum pump.

[0020] (Three) beneficial effects

[0021] The beneficial effects of the utility model are:

[0022] The utility model discloses a first driving part, pivot and multiple stirring rods are set up, and the stirring rod can stir the lithium hydroxide monohydrate powder in the stirring jar, thereby can heat evenly when the lithium hydroxide monohydrate powder is drying, avoid the uneven heating caused by partial heating, thereby influence lithium hydroxide powder's drying preparation efficiency. Through setting up multiple broken mechanism on every stirring rod along its length direction, it can scatter the agglomerated lithium hydroxide monohydrate powder. That is, the second driving part drives the broken wheel to rotate, and the broken wheel breaks the agglomeration and scatters, thereby ensuring the loose state of the material, increasing the heating area, and further improving the drying effect. Moreover, the broken mechanism breaks along with the stirring of the stirring rod, and multiple broken mechanisms can also perform secondary stirring on the lithium hydroxide monohydrate powder, which is more helpful to realize uniform heating of the lithium hydroxide monohydrate powder and avoid local overheating or incomplete drying. The utility model discloses a stirring mechanism and a broken mechanism, which reduce the problem of residual internal moisture caused by agglomeration, improve the preparation efficiency of lithium hydroxide powder, and improve the purity and quality of the final product. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole three-dimensional structure schematic view of the drying device for lithium hydroxide of the utility model.

[0024] Figure 2 It is a sectional structure schematic view of the drying device for lithium hydroxide of the utility model.

[0025] Figure 3 It is Figure 2 It is an enlarged structure schematic view of A in the middle.

[0026] Figure 4 It is a whole structure three-dimensional schematic view of the stirring mechanism and the broken mechanism of the drying device for lithium hydroxide of the utility model.

[0027]

BRIEF DESCRIPTION OF DRAWINGS

[0028] 1: stirring jar;11: outer jar;12: inner jar;121: upper jar body;122: lower jar body;2: stirring mechanism;21: first driving part;22: pivot;23: stirring rod;24: mounting frame;25: stirring blade;3: broken mechanism;31: broken wheel;311: rotating seat;312: broken blade;4: heater;5: broken fin;6: liquid inlet pipe;7: liquid outlet pipe;8: feed pipe;81: cover;82: pipe body;83: spiral channel;9: discharge pipe;10: vacuum air extraction device;101: filter;102: air extraction pipe;103: vacuum pump;a: stop valve. DETAILED DESCRIPTION

[0029] For a better understanding of the above technical solutions, the exemplary embodiments of the present application will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application can be more clearly, thoroughly understood and the scope of the present application can be completely conveyed to those skilled in the art.

[0030] Embodiment

[0031] As shown in Figure 1 , the lithium hydroxide drying device of the present embodiment comprises a stirring tank 1, a stirring mechanism 2 and a plurality of crushing mechanisms 3.

[0032] Specifically, as shown in Figure 2 and Figure 4 , the stirring mechanism 2 comprises a first driving member 21, a rotating shaft 22 and a plurality of stirring rods 23. The fixed end of the first driving member 21 is fixedly installed on the top of the stirring tank 1, the output end of the first driving member 21 is connected with one end of the rotating shaft 22 through the top of the stirring tank 1, the rotating shaft 22 extends vertically and the other end of the rotating shaft 22 is located at the bottom of the stirring tank 1, and the plurality of stirring rods 23 are connected perpendicularly to the outer wall of the rotating shaft 22. The first driving member 21 can drive the rotating shaft 22 to rotate, so as to drive the plurality of stirring rods 23 to stir the lithium hydroxide monohydrate powder contained in the stirring tank 1. A plurality of crushing mechanisms 3 are installed on each stirring rod 23 along the length direction thereof. The crushing mechanism 3 comprises a crushing wheel 31 and a second driving member (not shown in the figure). The second driving member is installed inside the stirring rod 23, the output end of the second driving member is connected with the crushing wheel 31, and the second driving member can drive the crushing wheel 31 to rotate, so as to break up the caked lithium hydroxide monohydrate powder. By arranging the first driving member 21, the rotating shaft 22 and the plurality of stirring rods 23, the stirring rods 23 can stir the lithium hydroxide monohydrate powder in the stirring tank 1, so that the lithium hydroxide monohydrate powder can be heated uniformly during drying, avoiding uneven heating caused by local heating, thereby affecting the drying preparation efficiency of the lithium hydroxide powder. By arranging a plurality of crushing mechanisms 3 on each stirring rod 23 along the length direction thereof, the caked lithium hydroxide monohydrate powder can be broken up. That is, the second driving member drives the crushing wheel 31 to rotate, and the crushing wheel 31 breaks up the caking, thereby ensuring the loose state of the material and increasing the heating area, further improving the drying effect. Moreover, the crushing mechanism 3 breaks up along with the stirring of the stirring rod 23, and the plurality of crushing mechanisms 3 can also perform secondary stirring on the lithium hydroxide monohydrate powder, which is more helpful to realize uniform heating of the lithium hydroxide monohydrate powder, avoiding the situation of local overheating or incomplete drying.

[0033] It should be noted that the rotating shaft 22 and the plurality of stirring rods 23 can be hollow structures, but the structural strength of the rotating shaft 22 and the plurality of stirring rods 23 should be ensured to avoid damage to the rotating shaft 22 and the plurality of stirring rods 23 during stirring. Among them, a plurality of power supplies can be fixedly installed in the hollow structure of the rotating shaft 22, the plurality of power supplies are connected in series, and the plurality of second driving members in the hollow structure of the same stirring rod 23 are connected in series and connected with one of the plurality of power supplies, so that the plurality of crushing mechanisms 3 can be started and stopped at the same time, that is, all the second driving members in the same stirring rod 23 are powered by the same power supply. When it is necessary to start the plurality of crushing mechanisms 3, the remote controller is only required to drive the plurality of power supplies to be turned on at the same time to drive the plurality of second driving members to be started at the same time, so as to drive the plurality of crushing rollers 31 to rotate at the same time, so as to crush and scatter the agglomerated lithium hydroxide monohydrate powder and perform secondary stirring. When the stirring is completed, the remote controller drives the plurality of power supplies to be turned off at the same time to simultaneously turn off the plurality of second driving members, so as to simultaneously drive the plurality of crushing rollers 31 to stop rotating. It should be noted that the above-mentioned remote controller drives the plurality of power supplies to be started and stopped at the same time, and the plurality of power supplies drive the plurality of second driving members to be started and stopped at the same time, which are all prior art, and also include relays, air switches and the like to ensure that the plurality of second driving members drive the plurality of crushing rollers 31 at the same time. The specific structure can refer to the remote power switch, which will not be described here. In addition, the first driving member 21 can be a speed reducer motor, and the second driving member can be a micro motor, and the specific model is not limited here.

[0034] Further, as shown in Figure 3 The crushing roller 31 includes a rotating seat 311 and a plurality of crushing blades 312. The rotating seat 311 is connected with the driving end of the second driving member, and the plurality of crushing blades 312 are fixedly arranged on the outer wall of the rotating seat 311. The second driving member can drive the rotating seat 311 to rotate, so as to drive the plurality of crushing blades 312 to rotate with the rotating seat 311, so as to scatter the agglomerated lithium hydroxide monohydrate powder. By arranging the rotating seat 311 and the plurality of crushing blades 312, the second driving member drives the rotating seat 311 to rotate at high speed, which can generate strong shearing force and centrifugal force. These forces act on the agglomerated lithium hydroxide monohydrate powder, effectively decompose it into smaller particles, and prevent the agglomerated lithium hydroxide monohydrate powder from being heated unevenly, which affects the preparation efficiency of the lithium hydroxide powder.

[0035] Further, as shown in Figure 4As shown, the end of the stirring rod 23 away from the rotating shaft 22 is arc-shaped, and the arc-shaped structure is recessed towards the rotating direction of the stirring rod 23, which helps to promote the overall circulation of the lithium hydroxide monohydrate powder, further improving the drying efficiency and processing effect. The end of the arc-shaped structure away from the rotating shaft 22 is in sliding fit with the inner wall of the stirring tank 1, which can effectively remove the lithium hydroxide monohydrate powder adhering to the inner wall of the stirring tank 1, especially for the lithium hydroxide monohydrate powder with certain viscosity or the agglomerated lithium hydroxide monohydrate powder, so that the lithium hydroxide monohydrate powder is more fully utilized, improving the utilization rate.

[0036] Further, as shown in Figure 2 The stirring tank 1 includes an outer tank 11 and an inner tank 12. The outer tank 11 is sleeved outside the inner tank 12, and the top and bottom of the outer tank 11 are connected with the top and bottom of the inner tank 12, respectively. A gap is formed between the inner wall of the outer tank 11 and the outer wall of the inner tank 12, which forms a heat insulation layer, which can reduce the heat loss to the external environment, improving the energy utilization efficiency during heating. The gap is provided with a heater 4 spirally arranged around the inner tank 12 for heating the lithium hydroxide monohydrate powder in the inner tank 12. The spirally arranged heater 4 can ensure that the heat is uniformly distributed around the inner tank 12, thereby achieving uniform heating of the lithium hydroxide monohydrate powder. Compared with the centralized or local heating mode, it can avoid the phenomenon of local overheating or incomplete drying of the lithium hydroxide monohydrate powder.

[0037] Further, as shown in Figure 2 The inner tank 12 includes an upper tank body 121 and a lower tank body 122. The bottom of the upper tank body 121 is connected with the top of the lower tank body 122, and the upper tank body 121 is in communication with the lower tank body 122. The upper tank body 121 is cylindrical, and the lower tank body 122 is inverted circular truncated cone-shaped, which can make the dried lithium hydroxide powder smoothly release due to the action of gravity, avoiding residual lithium hydroxide powder in the stirring tank 1. A plurality of crushing fins 5 are arranged on the inner wall of the lower tank body 122, which are arranged circumferentially around the axis of the lower tank body 122. It can effectively scatter the agglomerated lithium hydroxide monohydrate powder, so as to apply shear force and friction force to the lithium hydroxide monohydrate powder, thereby more thoroughly dispersing the agglomerated lithium hydroxide monohydrate powder and improving the drying efficiency.

[0038] Further, as shown in Figure 4As shown, the stirring mechanism 2 further comprises a mounting frame 24 and a plurality of stirring blades 25. The mounting frame 24 is mounted on the bottom of the upper tank body 121, the end of the rotating shaft 22 away from the first driving member 21 penetrates through the mounting frame 24 and is placed on the bottom of the lower tank body 122 with a space between the bottom wall of the lower tank body 122, the rotating shaft 22 is rotatably connected with the mounting frame 24, which can provide an additional support point for the stirring mechanism 2, enhance the stability of the rotating shaft 22 and prolong its service life. The plurality of stirring blades 25 are placed below the mounting frame 24 and in the lower tank body 122, the plurality of stirring blades 25 are vertically and circumferentially arranged on the outer wall of the rotating shaft 22 along the axis of the rotating shaft 22, the length of the plurality of stirring blades 25 decreases from top to bottom, which can match the inverted circular truncated cone structure of the lower tank body 122. As the lithium hydroxide monohydrate powder flows downward, the gradually shortened stirring blades 25 can better adapt to the change of space in the lower tank body 122, ensuring that the lithium hydroxide monohydrate powder can be fully stirred at each position, avoiding the stirring dead angle caused by the reduction of space.

[0039] Further, as shown in Figure 1 and Figure 2 , the outer wall of the outer tank 11 is horizontally installed with a liquid inlet pipe 6 and a liquid outlet pipe 7, the liquid inlet pipe 6 is located at the top of the outer tank 11, and the liquid outlet pipe 7 is located at the bottom of the outer tank 11. The heat conducting oil or hot water can enter the interlayer from the liquid inlet pipe 6 to assist the heater 4 to heat the inner tank 12, so that the heat is more stable and the drying efficiency is improved. After drying, it is released from the liquid outlet pipe 7 for recycling, improving the utilization rate of heat conducting oil and hot water.

[0040] Further, as shown in Figure 1 and Figure 2 , the present embodiment further comprises a feeding pipe 8 and a discharging pipe 9. The feeding pipe 8 is installed at the top of the stirring tank 1, the feeding pipe 8 communicates with the stirring tank 1, and is used for adding lithium hydroxide monohydrate powder into the stirring tank 1. The discharging pipe 9 is installed at the bottom of the stirring tank 1 through a stop valve a to release the lithium hydroxide monohydrate powder. By setting the stop valve a, not only can the discharge speed of the lithium hydroxide monohydrate powder be changed, but also the stop valve a can be quickly closed in emergency to prevent accidental leakage or other safety accidents.

[0041] Further, as shown in Figure 2As shown, the feeding pipe 8 comprises a cover 81, a pipe body 82 and a spiral channel 83. The pipe body 82 is fixedly installed on the top of the stirring tank 1 and communicates with the stirring tank 1, the spiral channel 83 is located in the pipe body 82, and the outer wall of the spiral channel 83 is connected with the inner wall of the pipe body 82. The lithium hydroxide monohydrate powder can enter the stirring tank 1 through the spiral channel 83 to slow down the falling speed of the lithium hydroxide monohydrate powder, avoid a large amount of lithium hydroxide monohydrate powder from entering the stirring tank 1 at one time, so as to realize a uniform and controllable feeding process, thereby ensuring the stability of drying and stirring. The cover 81 is detachably installed on the top of the pipe body 82 to close the pipe body 82. By setting the cover 81, the cover 81 can be covered after the lithium hydroxide monohydrate powder is added, so as to ensure the sealing of the stirring tank 1 and avoid foreign matters from entering or dust from leaking.

[0042] Further, the embodiment further comprises a vacuum air extraction device 10. The vacuum air extraction device 10 comprises a filter 101, an air extraction pipe 102 and a vacuum pump 103. The filter 101 is located in the stirring tank 1 and is used for filtering the lithium hydroxide monohydrate powder, so as to avoid the dried lithium hydroxide powder or the lithium hydroxide monohydrate powder which has not been dried from entering the air extraction pipe 102 and the vacuum pump 103, avoid damaging the vacuum pump 103 and reduce waste. The top of the filter 101 communicates with one end of the air extraction pipe 102, the other end of the air extraction pipe 102 is connected with the vacuum pump 103, and the vacuum pump 103 can extract air to make the steam released after the lithium hydroxide monohydrate powder is dried to be released in turn through the filter 101, the air extraction pipe 102 and the vacuum pump 103. By the air extraction pipe 102 and the vacuum pump 103, the steam released can be continuously extracted, so as to discharge the steam generated in the drying process from the stirring tank 1, avoid the steam from re-attaching to the surface of the dried lithium hydroxide powder after condensation, and ensure the dryness and purity of the final lithium hydroxide powder. The filter 101 is a micron filter, which can make air and steam pass through, but the lithium hydroxide and the lithium hydroxide monohydrate powder cannot pass through, so as to avoid the dried lithium hydroxide powder or the lithium hydroxide monohydrate powder which has not been dried from entering the air extraction pipe 102 and the vacuum pump 103. It is prior art and will not be described here.

[0043] Through the above structure, the working principle of the lithium hydroxide drying device of the embodiment is as follows:

[0044] As Figure 1As shown, the closing stop valve a, open cover 81, a lithium hydroxide monohydrate powder through the spiral channel 83 poured into the inner tank 12. Pour a certain amount, and take over the cover 81 cover on the pipe 82, so that the inner tank 12 is in a sealed state. Then open the heater 4, while closing the liquid outlet pipe 7, through the liquid inlet pipe 6 to the outer tank 11 and the inner tank 12 between the interlayer to add heat conducting oil or hot water, so as to assist the heater 4 heating, until the inner tank 12 internal temperature reaches 100-150 ℃, so that the internal lithium hydroxide monohydrate powder dehydration. In the process of heating the heater 4, the first drive 21 start, drive shaft 22 rotation, thus driving a plurality of stirring rod 23 and a plurality of stirring blades 25 with the rotation of the shaft 22 rotation, so as to stir the lithium hydroxide monohydrate powder. At the same time, the remote control drive a plurality of power supply start, a plurality of power supply simultaneously drive a plurality of second drive driven, thus driving a plurality of rotating seat 311 rotation, thus driving the broken blade 312 with the rotation of the rotating seat 311 rotation, so as to break the agglomerated lithium hydroxide monohydrate powder, increase the contact area of lithium hydroxide monohydrate powder, improve the drying efficiency. And the lower tank body 122 in the agglomerated lithium hydroxide monohydrate powder in contact with the broken fin 5 when the stirring is scattered.

[0045] After a period of time, the driving vacuum pump 103, to the inner tank 12 through the exhaust pipe 102 steam suction. Filter 101 prevent lithium hydroxide monohydrate powder and lithium hydroxide powder is sucked away. After drying, stop driving the first drive 21 and the second drive, so that the shaft 22 and the rotating seat 311 stop rotating. The interlayer of the heat conducting oil or hot water out of the liquid pipe 7 release, the heater 4 stop heating. After the inner tank 12 and the internal lithium hydroxide powder cooling to room temperature, open the stop valve a, so that the lithium hydroxide powder from the discharge pipe 9 release, complete the drying of lithium hydroxide.

[0046] The embodiment by setting the stirring mechanism 2 and broken mechanism 3, it reduces the problem of residual moisture due to the agglomeration of the internal, improve the preparation efficiency of lithium hydroxide powder, improve the purity and quality of the final product.

[0047] In the description of the utility model, it is understood that the term "first", "second" is only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can be explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0048] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect;Can be two element inside communication or two element mutual action relation.For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0049] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can be first and second feature direct contact, or first and second feature indirectly contact through intermediate medium.Moreover, first feature is "on", "above" and "upper surface" of second feature, can be first feature is directly above or obliquely above second feature, or just indicate that the horizontal height of first feature is higher than second feature.First feature is "under", "below" and "lower surface" of second feature, can be first feature is directly below or obliquely below second feature, or just indicate that the horizontal height of first feature is lower than second feature.

[0050] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable way.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0051] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as the limitation of the utility model, and the ordinary skilled person in the art can change, modify, replace and change the above-mentioned embodiments within the scope of the utility model.

Claims

1. A drying device for lithium hydroxide, characterized by, It comprises a stirring tank (1), a stirring mechanism (2) and a plurality of crushing mechanisms (3); The stirring mechanism (2) comprises a first driving member (21), a rotating shaft (22) and a plurality of stirring rods (23), the fixed end of the first driving member (21) is fixedly installed on the top of the stirring tank (1), the output end of the first driving member (21) penetrates through the top of the stirring tank (1) and is connected with one end of the rotating shaft (22), the rotating shaft (22) extends vertically and the other end of the rotating shaft (22) is located at the bottom of the stirring tank (1), a plurality of the stirring rods (23) are vertically connected to the outer wall of the rotating shaft (22), and the first driving member (21) can drive the rotating shaft (22) to rotate so as to drive a plurality of the stirring rods (23) to stir the lithium hydroxide monohydrate powder contained in the stirring tank (1). A plurality of the crushing mechanisms (3) are installed on each of the stirring rods (23) along the length direction thereof, the crushing mechanism (3) comprises a crushing wheel (31) and a second driving member, the second driving member is installed inside the stirring rod (23), the output end of the second driving member is connected with the crushing wheel (31), and the second driving member can drive the crushing wheel (31) to rotate so as to break up the caked lithium hydroxide monohydrate powder.

2. The lithium hydroxide drying device according to claim 1, characterized in that: The crushing wheel (31) comprises a rotating seat (311) and a plurality of crushing blades (312); The rotating seat (311) is connected with the driving end of the second driving member, a plurality of the crushing blades (312) are fixedly arranged in a circumferential array on the outer wall of the rotating seat (311), and the second driving member can drive the rotating seat (311) to rotate so as to drive a plurality of the crushing blades (312) to rotate with the rotating seat (311) to break up the caked lithium hydroxide monohydrate powder.

3. The lithium hydroxide drying device according to claim 1, characterized in that: The end of the stirring rod (23) away from the rotating shaft (22) is in an arc structure, the arc structure is recessed towards the rotating direction of the stirring rod (23), and the end of the arc structure away from the rotating shaft (22) is in sliding fit with the inner wall of the stirring tank (1).

4. The lithium hydroxide drying device according to claim 1, characterized in that: The stirring tank (1) comprises an outer tank (11) and an inner tank (12); The outer tank (11) is sleeved outside the inner tank (12), the top and bottom of the outer tank (11) are connected with the top and bottom of the inner tank (12) respectively, a gap is formed between the inner wall of the outer tank (11) and the outer wall of the inner tank (12), a heater (4) spirally arranged around the inner tank (12) is arranged in the gap, and the heater (4) is used for heating the lithium hydroxide monohydrate powder in the inner tank (12).

5. The lithium hydroxide drying device according to claim 4, characterized in that: The inner tank (12) comprises an upper tank body (121) and a lower tank body (122); The bottom of the upper tank body (121) is connected with the top of the lower tank body (122), the upper tank body (121) is communicated with the lower tank body (122), the upper tank body (121) is cylindrical, and the lower tank body (122) is inverted circular table shape. A plurality of crushing fins (5) are arranged on the inner wall of the lower tank body (122) and are arranged in a circumferential array around the axis of the lower tank body (122).

6. The lithium hydroxide drying device according to claim 5, characterized in that: The stirring mechanism (2) further comprises a mounting frame (24) and a plurality of stirring blades (25); The mounting frame (24) is mounted on the bottom of the upper tank body (121), one end of the rotating shaft (22) away from the first driving member (21) penetrates through the mounting frame (24) and is arranged at the bottom of the lower tank body (122), and there is a gap between the rotating shaft (22) and the bottom wall of the lower tank body (122), and the rotating shaft (22) is rotatably connected with the mounting frame (24); A plurality of stirring blades (25) are arranged below the mounting frame (24) and in the lower tank body (122), the plurality of stirring blades (25) are arranged in a vertical circumferential array on the outer wall of the rotating shaft (22) along the axis of the rotating shaft (22), and the lengths of the plurality of stirring blades (25) decrease from top to bottom.

7. The lithium hydroxide drying device according to claim 4, characterized in that: A liquid inlet pipe (6) and a liquid outlet pipe (7) are horizontally mounted on the outer wall of the outer tank (11), the liquid inlet pipe (6) is arranged at the top of the outer tank (11), and the liquid outlet pipe (7) is arranged at the bottom of the outer tank (11); The heat-conducting oil or hot water can enter the interlayer from the liquid inlet pipe (6) and be discharged from the liquid outlet pipe (7).

8. The lithium hydroxide drying device according to claim 1, characterized in that: Further comprising a feeding pipe (8) and a discharging pipe (9); The feeding pipe (8) is mounted on the top of the stirring tank (1) and is communicated with the stirring tank (1) to add a lithium hydroxide monohydrate powder into the stirring tank (1); The discharging pipe (9) is mounted on the bottom of the stirring tank (1) through a stop valve (a) to discharge a lithium hydroxide monohydrate powder.

9. The lithium hydroxide drying device according to claim 8, characterized in that: The feeding pipe (8) comprises a cover (81), a pipe body (82) and a spiral channel (83); The pipe body (82) is fixedly mounted on the top of the stirring tank (1) and is communicated with the stirring tank (1), the spiral channel (83) is arranged in the pipe body (82), and the outer wall of the spiral channel (83) is connected with the inner wall of the pipe body (82), a lithium hydroxide monohydrate powder can enter the stirring tank (1) through the spiral channel (83) to slow down the falling speed of the lithium hydroxide monohydrate powder; The cover (81) is detachably mounted on the top of the pipe body (82) to close the pipe body (82).

10. The drying device for lithium hydroxide according to claim 1, characterized in that: It further comprises a vacuum air extraction device (10); The vacuum air extraction device (10) comprises a filter (101), an air extraction pipe (102) and a vacuum pump (103); The filter (101) is located in the stirring tank (1) and used for filtering lithium hydroxide monohydrate powder; The top of the filter (101) is communicated with one end of the air extraction pipe (102), the other end of the air extraction pipe (102) is connected with the vacuum pump (103), and the vacuum pump (103) can extract air so that the steam released after the lithium hydroxide monohydrate powder is dried is released in sequence through the filter (101), the air extraction pipe (102) and the vacuum pump (103).

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