Drying device for lithium hydroxide monohydrate powder and using method

Abstract

The invention relates to the technical field of drying equipment, in particular to a drying device for lithium hydroxide monohydrate powder and a using method. The device comprises a stirring barrel, a driving device and a stirring device, the stirring barrel is horizontally arranged and comprises an outer barrel and an inner barrel used for containing lithium hydroxide monohydrate powder, the inner barrel is rotatably mounted in the outer barrel, the inner barrel and the outer barrel are coaxially arranged, and a plurality of heating pieces are mounted on the inner wall of the outer barrel; the driving device is respectively connected with the end wall of the inner cylinder and the end wall of the outer cylinder; one end of the stirring device is rotatably connected with the inner wall of one side, close to the driving device, of the inner barrel, and the other end of the stirring device penetrates through the end wall of one side, away from the driving device, of the inner barrel. By arranging the driving device and the stirring device, the outer barrel and the inner barrel are driven to synchronously and reversely rotate at the same time, and the stirring device synchronously rotates, so that a plurality of heating sheets uniformly heat the inner barrel, and the drying rate of lithium hydroxide monohydrate powder is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of drying equipment, and particularly relates to a drying device and a using method for lithium hydroxide monohydrate powder. Background Art

[0002] Lithium hydroxide is an inorganic compound with the chemical formula LiOH. It appears as a white crystalline powder, is soluble in water, slightly soluble in ethanol, has strong alkalinity, the pH of a 1mol / L solution is about 14, pKb = -0.04, and is mainly used for preparing lithium salts and lithium-based greases, electrolytes of alkaline storage batteries, absorption liquid of lithium bromide refrigerators, carbon dioxide absorbents, etc.

[0003] To prepare lithium hydroxide powder, it is usually necessary to heat and dehydrate lithium hydroxide monohydrate powder. (Lithium hydroxide monohydrate is also known as lithium hydroxide monohydrate, with the molecular formula LiOH·H 2 2O, and the molar mass is 41.9636 (about 42). Lithium hydroxide monohydrate is a white crystalline powder. It is soluble in water and slightly soluble in alcohol. It can absorb carbon dioxide from the air and deteriorate. It is strongly alkaline, does not burn, but has strong corrosiveness. It usually appears in the form of monohydrate. It is mainly used as a raw material for preparing lithium compounds. It can also be used in industries such as metallurgy, petroleum, glass, and ceramics). That is, pour lithium hydroxide monohydrate powder into a stirring tank and heat it at a high temperature to make it lose crystal water and convert it into anhydrous lithium hydroxide. The temperature is generally controlled above 100°C, and the specific temperature is adjusted according to the actual situation. Usually, a relatively high temperature is required to ensure complete removal of crystal water.

[0004] However, when using a traditional drying device to dry lithium hydroxide monohydrate powder to prepare anhydrous lithium hydroxide powder, the traditional drying device does not stir the lithium hydroxide monohydrate powder sufficiently, and when the traditional drying device heats and dehydrates the lithium hydroxide monohydrate powder, it is extremely easy to cause uneven heating of the lithium hydroxide monohydrate powder, resulting in part of the lithium hydroxide monohydrate powder being unable to be dried and dehydrated to form anhydrous lithium hydroxide powder, greatly reducing the preparation quality and preparation efficiency of anhydrous lithium hydroxide powder. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a drying device and a using method for lithium hydroxide monohydrate powder, which solve the technical problem that the traditional drying device is extremely easy to cause uneven heating of lithium hydroxide monohydrate powder, resulting in part of the lithium hydroxide monohydrate powder being unable to be dried and dehydrated to form anhydrous lithium hydroxide powder, reducing the preparation quality and preparation efficiency of anhydrous lithium hydroxide powder.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the main technical solutions adopted by the present invention include:

[0009] On the one hand, the present invention provides a drying device for lithium hydroxide monohydrate powder, including a stirring cylinder, a driving device and a stirring device; the stirring cylinder is horizontally arranged, and it includes an outer cylinder and an inner cylinder for accommodating lithium hydroxide monohydrate powder. The inner cylinder is rotatably installed in the outer cylinder. The inner cylinder and the outer cylinder are coaxially arranged and a sandwich layer is formed between them. A plurality of heating sheets are installed on the inner wall of the outer cylinder for heating the inner cylinder; the driving device is respectively connected to the end wall of the inner cylinder and the end wall of the outer cylinder to drive the outer cylinder and the inner cylinder to rotate synchronously and reversely, so that the plurality of heating sheets uniformly heat the inner cylinder; one end of the stirring device is rotatably connected to the inner wall of the inner cylinder close to the driving device, and the other end passes through the end wall of the inner cylinder far from the driving device. The stirring device can rotate synchronously around the axis of the inner cylinder as the inner cylinder rotates, and at the same time rotate around the axis of the stirring device itself to stir the lithium hydroxide monohydrate powder in the stirring cylinder.

[0010] Preferably, the driving device includes a reduction motor, a transmission mechanism, a first rotating shaft and a second rotating shaft. The fixed end of the reduction motor is fixedly installed on the top of the installation platform. The output end of the reduction motor is connected to the transmission mechanism. The first rotating shaft and the second rotating shaft are coaxially arranged. The first rotating shaft is inserted inside the second rotating shaft. One ends of the first rotating shaft and the second rotating shaft are both connected to the transmission mechanism. The other ends of the first rotating shaft and the second rotating shaft are respectively connected to the end wall of the inner cylinder and the end wall of the outer cylinder; the reduction motor can drive the first rotating shaft and the second rotating shaft to rotate synchronously and reversely around their own axes through the transmission mechanism.

[0011] Preferably, the transmission mechanism includes a first bevel gear, a second bevel gear, a third bevel gear and a protective housing; the second bevel gear and the third bevel gear are arranged oppositely, the second bevel gear is rotatably mounted on the inner wall of the protective housing, and the first bevel gear is vertically meshed with the second bevel gear and the third bevel gear respectively; one end of the first rotating shaft is connected to the second bevel gear, and the other end passes through the protective housing and is connected to the end wall of the inner cylinder; one end of the second rotating shaft is connected to the third bevel gear, and the other end passes through the protective housing and is connected to the end wall of the outer cylinder; the output end of the reduction motor passes through the bottom wall of the protective housing and is connected to the first bevel gear; the reduction motor can drive the first bevel gear to rotate, so that the first bevel gear drives the second bevel gear and the third bevel gear to rotate synchronously and reversely respectively, to drive the first rotating shaft and the second rotating shaft to rotate synchronously and reversely, so as to drive the outer cylinder and the inner cylinder to rotate synchronously and reversely; the first rotating shaft, the second rotating shaft, the second bevel gear, the third bevel gear, the inner cylinder and the outer cylinder are coaxially arranged.

[0012] Preferably, the stirring device includes a plurality of stirring mechanisms and a first gear; a plurality of the stirring mechanisms are all arranged inside the inner cylinder, the axes of the plurality of stirring mechanisms are parallel to the axis of the inner cylinder, and the center connection lines of the plurality of stirring mechanisms are square; each stirring mechanism includes a rotating shaft, a second gear, and a plurality of groups of stirring components; the first gear is fixedly mounted on the end wall of the inner cylinder away from the driving device through a fixed shaft, and the axis of the first gear is consistent with the axis of the inner cylinder; one end of the rotating shaft is rotatably connected to the inner wall of the inner cylinder facing the driving device, and the other end passes through the side of the inner cylinder away from the driving device and is fixedly connected to the second gear through a fixed shaft, and the second gear meshes with the first gear; a plurality of groups of the stirring components are arranged at intervals along the axis of the rotating shaft and are perpendicularly connected to the rotating shaft, the plurality of groups of the stirring components on the plurality of rotating shafts correspond to each other, and the axes of the corresponding plurality of groups of the stirring components on the plurality of rotating shafts are located in the same vertical plane; the inner cylinder can drive the plurality of rotating shafts to rotate around the axis of the inner cylinder, so as to drive the plurality of second gears to rotate around the axis of the first gear and rotate self, to drive the rotating shaft to rotate self, so that the plurality of groups of the stirring components rotate along with the self-rotation of the rotating shaft, so as to stir the lithium hydroxide monohydrate powder in the inner cylinder.

[0013] Preferably, the stirring component includes a plurality of stirring rods; the plurality of stirring rods are perpendicularly connected to the outer wall of the rotating shaft, and the plurality of stirring rods corresponding to the plurality of rotating shafts are arranged staggeredly.

[0014] Preferably, a brush is installed at one end of each stirring rod away from the rotating shaft, and one end of the brush away from the stirring rod can be slidably attached to the inner wall of the inner cylinder to clean the inner wall of the inner cylinder.

[0015] Preferably, the drying device further includes at least two mounting brackets; at least two of the mounting brackets are vertically installed on the top of the mounting platform, and the stirring cylinder is rotatably horizontally installed in the mounting brackets to support the stirring cylinder.

[0016] Preferably, it further includes two cover caps; a feed port and a discharge port are respectively formed on both side end walls of the inner cylinder, the feed port is located above the discharge port, and the two cover caps can be respectively buckled at the feed port and the discharge port to close the inner cylinder.

[0017] Preferably, the outer cylinder includes a cylinder body and two end covers; the inner cylinder is placed inside the cylinder body, and a plurality of heating sheets are installed on the inner wall of the cylinder body, and the two end covers are respectively installed at both ends of the cylinder body to close the cylinder body.

[0018] On the other hand, the present invention provides a method for using a drying device for lithium hydroxide monohydrate powder, including the above-mentioned drying device, and further including the following steps:

[0019] S1: Add 100L - 500L of lithium hydroxide monohydrate powder into the inner cylinder;

[0020] S2: After adding is completed, start a plurality of the heating sheets so that the temperature of the inner cylinder reaches between 120°C and 180°C to reach the dehydration temperature of the lithium hydroxide monohydrate powder;

[0021] S3: Start the driving device simultaneously with step S2;

[0022] S4: The driving device synchronously drives the outer cylinder and the inner cylinder to rotate in opposite directions around their own axes at a speed of 10 rpm - 30 rpm, so that a plurality of the heating sheets uniformly heat the inner cylinder to heat and dehydrate the lithium hydroxide monohydrate in the inner cylinder;

[0023] S5: The stirring device rotates in the same direction as the inner cylinder at the same speed as the inner cylinder in step S5, and moreover, the stirring device can simultaneously rotate in the same direction as the rotation direction of the inner cylinder around its own axis, and the rotation speed of the self-rotation of the stirring device is 20 rpm - 40 rpm to stir the lithium hydroxide monohydrate powder in the inner cylinder;

[0024] S6: After all the lithium hydroxide monohydrate powder is dehydrated and dried, stop the driving device and take out the dehydrated anhydrous lithium hydroxide powder from the inner cylinder.

[0025] (III) Advantageous Effects

[0026] The advantageous effects of the present invention are as follows:

[0027] In the present invention, a plurality of heating sheets are arranged on the inner wall of the outer cylinder, which can heat the inner cylinder to heat and dehydrate the lithium hydroxide monohydrate powder in the inner cylinder. By providing a driving device, which is respectively connected to the end walls of the inner cylinder and the outer cylinder, the inner cylinder and the outer cylinder can be driven to rotate in opposite directions at the same time, so as to realize the uniform heating of the inner cylinder by the plurality of heating sheets on the inner wall of the outer cylinder, so that the lithium hydroxide monohydrate powder in the inner cylinder is uniformly heated, improving the heat exchange efficiency, accelerating the drying rate of the lithium hydroxide monohydrate powder, and improving the preparation efficiency and quality of the anhydrous lithium hydroxide powder. Moreover, by providing a stirring device, the stirring device can rotate and rotate itself along with the rotation of the inner cylinder, which can stir the lithium hydroxide monohydrate powder in the inner cylinder, so that the lithium hydroxide monohydrate powder can be heated while being stirred, increasing its heating area and improving the drying efficiency. By providing a driving device and a stirring device, the present invention realizes driving the outer cylinder and the inner cylinder to rotate synchronously in opposite directions at the same time and making the stirring device rotate synchronously, so as to uniformly heat the inner cylinder by the plurality of heating sheets on the inner wall of the outer cylinder, improving the drying rate of the lithium hydroxide monohydrate powder in the inner cylinder and improving the preparation efficiency and quality of the anhydrous lithium hydroxide powder. Description of the Drawings

[0028] Figure 1 It is an overall three-dimensional structural schematic diagram of a drying device and a using method for lithium hydroxide monohydrate powder according to the present invention;

[0029] Figure 2 It is a sectional structural schematic diagram of a stirring cylinder, a driving device and a stirring device of a drying device and a using method for lithium hydroxide monohydrate powder according to the present invention;

[0030] Figure 3 It is an overall disassembled structural schematic diagram of an inner cylinder and a stirring device of a drying device and a using method for lithium hydroxide monohydrate powder according to the present invention.

[0031]

Description of the Reference Numerals

[0032] 1: Agitating cylinder; 11: Outer cylinder; 111: Cylinder body; 112: Cover; 12: Inner cylinder; 121: Feed inlet; 122: Discharge outlet; 2: Driving device; 21: Reducing motor; 22: Transmission mechanism; 221: First bevel gear; 222: Second bevel gear; 223: Third bevel gear; 224: Protective shell; 23: First rotating shaft; 24: Second rotating shaft; 3: Heating sheet; 4: Agitating device; 41: Agitating mechanism; 411: Rotating shaft; 412: Second gear; 413: Agitating assembly; 4131: Agitating rod; 4132: Brush; 42: First gear; 5: Mounting bracket; 6: Cover; 7: Universal wheel; 8: Fixed shaft; 9: Mounting platform. Detailed implementation manners

[0033] To better understand the above technical solutions, the exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and the scope of the present invention can be fully conveyed to those skilled in the art.

[0034] Embodiment 1

[0035] As Figure 1 shown, this embodiment provides a drying device for lithium hydroxide monohydrate powder, including an agitating cylinder 1, a driving device 2 and an agitating device 4.

[0036] Specifically, the mixing drum 1 is horizontally arranged and includes an outer cylinder 11 and an inner cylinder 12 for accommodating lithium hydroxide monohydrate powder. The inner cylinder 12 is rotatably installed in the outer cylinder 11. The inner cylinder 12 and the outer cylinder 11 are coaxially arranged and a sandwich layer is formed between them. A plurality of heating sheets 3 are installed on the inner wall of the outer cylinder 11 for heating the inner cylinder 12. The driving device 2 is respectively connected to the end walls of the inner cylinder 12 and the outer cylinder 11 to drive the outer cylinder 11 and the inner cylinder 12 to rotate synchronously in opposite directions, so that the plurality of heating sheets 3 uniformly heat the inner cylinder 12. One end of the stirring device 4 is rotatably connected to the inner wall of the inner cylinder 12 close to the driving device 2, and the other end passes through the end wall of the inner cylinder 12 far from the driving device 2. The stirring device 4 can rotate synchronously around the axis of the inner cylinder 12 as the inner cylinder 12 rotates, and at the same time rotate around its own axis to stir the lithium hydroxide monohydrate powder in the mixing drum 1. By arranging a plurality of heating sheets 3 on the inner wall of the outer cylinder 11, it can heat the inner cylinder 12 to heat and dehydrate the lithium hydroxide monohydrate powder in the inner cylinder 12. By arranging the driving device 2 and connecting it to the end walls of the inner cylinder 12 and the outer cylinder 11 respectively, the inner cylinder 12 and the outer cylinder 11 can be driven to rotate in opposite directions at the same time, so as to realize the uniform heating of the inner cylinder 12 by the plurality of heating sheets 3 on the inner wall of the outer cylinder 11, so that the lithium hydroxide monohydrate powder in the inner cylinder 12 is uniformly heated, improving the heat exchange efficiency, accelerating the drying rate of the lithium hydroxide monohydrate powder, and improving the preparation efficiency and quality of the anhydrous lithium hydroxide powder. Moreover, by arranging the stirring device 4, the stirring device 4 can rotate and rotate self - synchronously as the inner cylinder 12 rotates, and it can stir the lithium hydroxide monohydrate powder in the inner cylinder 12, so that the lithium hydroxide monohydrate powder can be heated while being stirred, increasing its heating area and improving the drying efficiency. Preferably, the volume of the inner cylinder 12 is between 100L and 500L, which is convenient for improving production efficiency. The heat transfer temperature range of the plurality of heating sheets 3 in the inner cylinder 12 is 120°C - 180°C, so as to facilitate the drying of the lithium hydroxide monohydrate powder to form anhydrous lithium hydroxide powder.

[0037] Preferably, as Figure 2 shown, two adjacent rows of heating sheets 3 along the axis of the outer cylinder 11 are staggered, so that the plurality of heating sheets 3 can uniformly heat the inner cylinder 12.

[0038] Furthermore, as Figure 2 and Figure 3As shown in the figure, the outer cylinder 11 and the inner cylinder 12 are rotatably connected through grooves and protrusions. Specifically, two circular grooves are provided on the inner wall of the outer cylinder 11. The axes of the circular grooves are consistent with the axis of the outer cylinder 11, and the positions of the two circular grooves are located at both ends of the outer cylinder 11. T-shaped protrusions corresponding to the circular grooves are provided on the outer wall of the inner cylinder 12. The inner cylinder 12 is rotatably installed in the outer cylinder 11 through the T-shaped protrusions and the circular grooves, so as to achieve stable installation and enable the inner cylinder 12 and the outer cylinder 11 to rotate in opposite directions. Among them, a plurality of rollers are further provided on the T-shaped protrusions, and the rollers are in rolling connection with the circular grooves, so as to reduce the friction force when the outer cylinder 11 and the inner cylinder 12 rotate in opposite directions, and make the outer cylinder 11 and the inner cylinder 12 rotate more smoothly when rotating in opposite directions.

[0039] Furthermore, as Figure 2 shown in the figure, the driving device 2 includes a reduction motor 21, a transmission mechanism 22, a first rotating shaft 23 and a second rotating shaft 24. The fixed end of the reduction motor 21 is fixedly installed on the top of the installation platform 9. The output end of the reduction motor 21 is connected to the transmission mechanism 22. The first rotating shaft 23 and the second rotating shaft 24 are coaxially arranged. The first rotating shaft 23 is inserted into the second rotating shaft 24. One ends of the first rotating shaft 23 and the second rotating shaft 24 are both connected to the transmission mechanism 22, and the other ends of the first rotating shaft 23 and the second rotating shaft 24 are respectively connected to the end walls of the inner cylinder 12 and the outer cylinder 11. The reduction motor 21 can drive the first rotating shaft 23 and the second rotating shaft 24 to rotate synchronously and in opposite directions around their own axes through the transmission mechanism 22. By setting the reduction motor 21, the transmission mechanism 22, the first rotating shaft 23 and the second rotating shaft 24, the first rotating shaft 23 is inserted into the second rotating shaft 24, and one ends of the first rotating shaft 23 and the second rotating shaft 24 far from the transmission mechanism 22 are respectively connected to the end walls of the inner cylinder 12 and the outer cylinder 11, so that the reduction motor 21 can drive the first rotating shaft 23 and the second rotating shaft 24 to rotate synchronously and in opposite directions through the transmission mechanism 22, thereby driving the outer cylinder 11 and the inner cylinder 12 to rotate synchronously and in opposite directions around their own axes, so as to realize that a plurality of heating sheets 3 on the inner wall of the outer cylinder 11 can rotate with the rotation of the outer cylinder 11, so that the plurality of heating sheets 3 can uniformly heat the inner cylinder 12, so that the lithium hydroxide monohydrate powder in the inner cylinder 12 can be heated evenly, improving the heat exchange efficiency, accelerating the drying rate of the lithium hydroxide monohydrate powder, and improving the preparation efficiency and preparation quality of the anhydrous lithium hydroxide powder.

[0040] Preferably, the speed of the reduction motor 21 driving the first rotating shaft 23 and the second rotating shaft 24 to rotate is 10 rpm - 30 rpm, so that the rotation speeds of the outer cylinder 11 and the inner cylinder 12 are 10 rpm - 30 rpm, so that the lithium hydroxide monohydrate powder in the inner cylinder 12 can roll stably, avoiding the situation of dusting of the lithium hydroxide monohydrate powder, and enabling the plurality of heating sheets 3 to stably and uniformly heat the inner cylinder 12, so that the lithium hydroxide monohydrate powder in the inner cylinder 12 can be uniformly heated and dried, improving the drying efficiency.

[0041] Furthermore, as Figure 2 shown, the transmission mechanism 22 includes a first bevel gear 221, a second bevel gear 222, a third bevel gear 223 and a protective housing 224. The second bevel gear 222 and the third bevel gear 223 are arranged oppositely, the second bevel gear 222 is rotatably installed on the inner wall of the protective housing 224, and the first bevel gear 221 is vertically meshed with the second bevel gear 222 and the third bevel gear 223 respectively. One end of the first rotating shaft 23 is connected to the second bevel gear 222, and the other end passes through the protective housing 224 and is connected to the end wall of the inner cylinder 12. One end of the second rotating shaft 24 is connected to the third bevel gear 223, and the other end passes through the protective housing 224 and is connected to the end wall of the outer cylinder 11. The output end of the reduction motor 21 passes through the bottom wall of the protective housing 224 and is connected to the first bevel gear 221. The reduction motor 21 can drive the first bevel gear 221 to rotate, so that the first bevel gear 221 drives the second bevel gear 222 and the third bevel gear 223 to rotate synchronously and reversely respectively, to drive the first rotating shaft 23 and the second rotating shaft 24 to rotate synchronously and reversely, thereby driving the outer cylinder 11 and the inner cylinder 12 to rotate synchronously and reversely, so as to realize uniform heating of the inner cylinder 12 by the plurality of heating sheets 3 and improve the drying rate of the lithium hydroxide monohydrate powder in the inner cylinder 12. By providing the protective housing 224, on the one hand, it can improve the installation stability of the second bevel gear 222 and the third bevel gear 223, and on the other hand, it can also protect the first bevel gear 221, the second bevel gear 222 and the third bevel gear 223 inside, avoiding the influence of dust, dirt, etc. on the transmission. The first rotating shaft 23, the second rotating shaft 24, the second bevel gear 222, the third bevel gear 223, the inner cylinder 12 and the outer cylinder 11 are coaxially arranged, which can ensure the stability and consistency of the transmission mechanism 22 and avoid eccentric rotation.

[0042] It should be noted that the sizes and numbers of teeth of the first bevel gear 221, the second bevel gear 222 and the third bevel gear 223 are the same, and their transmission ratio is 1:1, so that the inner cylinder 12 and the outer cylinder 11 can rotate stably.

[0043] Furthermore, as Figure 2As shown, the stirring device 4 includes a plurality of stirring mechanisms 41 and a first gear 42. The plurality of stirring mechanisms 41 are all disposed inside the inner cylinder 12. The axes of the plurality of stirring mechanisms 41 are parallel to the axis of the inner cylinder 12, and the center connection lines of the plurality of stirring mechanisms 41 form a square, so that the plurality of stirring mechanisms 41 form a symmetric and uniformly distributed structure inside the inner cylinder 12, ensuring that during the stirring process, the lithium hydroxide monohydrate powder can be more uniformly mixed and turned in the inner cylinder 12, reducing the possibility of the lithium hydroxide monohydrate powder accumulating, and improving the dispersibility and uniformity of the lithium hydroxide monohydrate powder during the drying process. By providing a plurality of stirring mechanisms 41, and the plurality of stirring mechanisms 41 can not only rotate synchronously with the rotation of the inner cylinder 12, but also rotate self-rotation through the rotation of the inner cylinder 12, which can significantly improve the stirring efficiency of the lithium hydroxide monohydrate powder inside the inner cylinder 12, make the lithium hydroxide monohydrate powder uniformly distributed inside the inner cylinder 12, avoid accumulation and dead corner areas, so as to ensure that the heating and drying processes are more uniform.

[0044] As Figure 2 and Figure 3As shown, each stirring mechanism 41 includes a rotating shaft 411, a second gear 412, and multiple groups of stirring components 413. The first gear 42 is fixedly installed on the end wall of the inner cylinder 12 away from the driving device 2 through a fixed shaft 8, and the axis of the first gear 42 is consistent with the axis of the inner cylinder 12. One end of the rotating shaft 411 is rotatably connected to the inner wall of the end of the inner cylinder 12 facing the driving device 2, and the other end passes through the side of the inner cylinder 12 away from the driving device 2 and is fixedly connected to the second gear 412 through a fixed shaft 8. The second gear 412 meshes with the first gear 42. The multiple groups of stirring components 413 are arranged at intervals along the axis of the rotating shaft 411 and are perpendicularly connected to the rotating shaft 411. The multiple groups of stirring components 413 on the multiple rotating shafts 411 correspond one by one, and the axes of the corresponding multiple groups of stirring components 413 on the multiple rotating shafts 411 are located in the same vertical plane. The inner cylinder 12 can drive the multiple rotating shafts 411 to rotate around the axis of the inner cylinder 12, so as to drive the multiple second gears 412 to rotate around the axis of the first gear 42 and rotate self - rotatably, so as to drive the rotating shaft 411 to rotate self - rotatably, so that the multiple groups of stirring components 413 rotate with the self - rotation of the rotating shaft 411, so as to stir the lithium hydroxide monohydrate powder in the inner cylinder 12. By setting the rotating shaft 411, the second gear 412, and the multiple groups of stirring components 413, and fixedly installing the first gear 42 on the end wall of the inner cylinder 12 away from the driving device 2, when the inner cylinder 12 rotates, the multiple rotating shafts 411 rotate around the axis of the inner cylinder 12 with the rotation of the inner cylinder 12. At the same time, since the multiple second gears 412 in the multiple stirring mechanisms 41 all mesh with the first gear 42, during the process of the rotating shaft 411 rotating around the axis of the inner cylinder 12, the multiple second gears 412 rotate around the axis of the first gear 42. In this way, the first gear 42 is equivalent to a sun gear, and the multiple second gears 412 are equivalent to planet gears. The first gear 42 is fixed, resulting in the multiple second gears 412 rotating self - rotatably and rotating around the axis of the first gear 42, so that the multiple rotating shafts 411 rotate self - rotatably, thus realizing the rotation of the multiple stirring components 413 with the self - rotation of the multiple rotating shafts 411, so as to stir the lithium hydroxide monohydrate powder in the inner cylinder 12 in all directions and at multiple levels, ensuring the uniform distribution and repeated turning of the lithium hydroxide monohydrate powder in the inner cylinder 12, and greatly improving the drying efficiency and heating uniformity. Among them, as Figure 3 shown, the rotating shaft 411 is rotatably connected to the inner cylinder 12 through a bearing. Preferably, the self - rotation speeds of the multiple rotating shafts 411 are the same, all being 20 rpm - 40 rpm, so that the multiple groups of stirring components 413 are more stable when stirring the lithium hydroxide monohydrate powder. It should be noted that the ratio of the number of teeth of the first gear 42 to the number of teeth of the second gear 412 is 2:1 or 3:1, in order to balance the self - rotation speed and mechanical strength of the rotating shaft 411.

[0045] Furthermore, as Figure 3As shown, the stirring assembly 413 includes a plurality of stirring rods 4131. The plurality of stirring rods 4131 are vertically connected to the outer wall of the rotating shaft 411, and they can stir the lithium hydroxide monohydrate powder in the inner cylinder 12 at multiple levels, ensuring that the lithium hydroxide monohydrate powder is evenly heated and improving the drying efficiency of the lithium hydroxide monohydrate powder. The plurality of stirring rods 4131 corresponding to the plurality of rotating shafts 411 are arranged staggeredly, which can prevent interference between the plurality of stirring rods 4131 on the plurality of rotating shafts 411. Since the plurality of rotating shafts 411 rotate synchronously at the same rate, it is only necessary to avoid interference between the plurality of stirring rods 4131 during installation to avoid interference between the plurality of stirring rods 4131 during stirring, thereby improving the stability of the stirring device 4. The distance between two adjacent stirring rods 4131 within the same set of stirring assemblies 413 on the same rotating shaft 411 is between 15 cm and 20 cm along the outer wall of the rotating shaft 411.

[0046] Furthermore, as Figure 3 shown, a brush 4132 is installed at one end of each stirring rod 4131 away from the rotating shaft 411. One end of the brush 4132 away from the stirring rod 4131 can be slidably attached to the inner wall of the inner cylinder 12 to clean the inner wall of the inner cylinder 12. This can not only prevent the lithium hydroxide monohydrate powder from adhering to the inner wall of the inner cylinder 12, avoiding waste or difficult cleaning of the lithium hydroxide monohydrate powder caused by adhesion, but also scrape off the possibly formed lumps or accumulated lithium hydroxide monohydrate powder and remix it into the main lithium hydroxide monohydrate powder for tumbling and heating, significantly reducing the possibility of the lithium hydroxide monohydrate powder caking, ensuring the continuity and stability of the drying process, and improving the preparation quality of the anhydrous lithium hydroxide powder. Preferably, the distance between the hairs on the brush 4132 is 1 mm - 2 mm, and the particle sizes of the lithium hydroxide monohydrate powder and the anhydrous lithium hydroxide powder are generally 15 μm, thereby preventing the lithium hydroxide monohydrate powder from adhering to the brush 4132. It should be noted that the distance between the hairs on the brush 4132 is determined according to the particle sizes of the lithium hydroxide monohydrate powder and the anhydrous lithium hydroxide powder.

[0047] Furthermore, as Figure 1As shown, the drying device further includes at least two mounting brackets 5. At least two mounting brackets 5 are vertically mounted on the top of the mounting platform 9, and the mixing drum 1 is rotatably horizontally mounted within the mounting brackets 5 to support the mixing drum 1. By providing at least two mounting brackets 5, it can keep the mixing drum 1 in a horizontal state during operation and prevent it from shaking or tilting due to the synchronous reverse rotation of the inner cylinder 12 and the outer cylinder 11, enhancing the structural stability of the entire drying device, avoiding mechanical failures caused by vibration or imbalance, and improving the safety and reliability of the operation of the drying device. Specifically, the mounting bracket 5 includes a plurality of support frames and a large bearing. One end of each of the plurality of support frames is connected to the outer wall of the large bearing, and the other end is connected to the mounting platform 9. The inner ring of the large bearing is connected to the outer cylinder 11, as Figure 1 shown, so as to enable the outer cylinder 11 to rotate.

[0048] Furthermore, as Figure 2 and Figure 3 shown, it further includes two cover caps 6. Feeding ports 121 and discharging ports 122 are respectively formed on both side end walls of the inner cylinder 12, the feeding port 121 is located above the discharging port 122, and the two cover caps 6 can respectively cover the feeding port 121 and the discharging port 122 to close the inner cylinder 12. By providing two cover caps 6, it can close the feeding port 121 and the discharging port 122 when it is not necessary to add lithium hydroxide monohydrate powder into the inner cylinder 12 through the feeding port 121 and release lithium hydroxide monohydrate powder through the discharging port 122, preventing the leakage of lithium hydroxide monohydrate powder or the entry of external impurities and ensuring the operation safety.

[0049] Furthermore, as Figure 2 shown, the outer cylinder 11 includes a cylinder body 111 and two end covers 112. The inner cylinder 12 is placed inside the cylinder body 111, and a plurality of heating sheets 3 are all mounted on the inner wall of the cylinder body 111. The two end covers 112 are respectively mounted at both ends of the cylinder body 111 to close the cylinder body 111, preventing heat from dissipating from both ends of the cylinder body 111, and at the same time avoiding the entry of external moisture or impurities into the inside of the cylinder body 111, improving the thermal energy utilization rate, ensuring that the lithium hydroxide monohydrate powder inside the inner cylinder 12 can be dried under stable temperature and humidity conditions, and thus enhancing the drying efficiency and product quality.

[0050] Furthermore, as Figure 1 shown, universal wheels 7 are further provided at the bottom of the mounting platform 9, which can move the drying device to any position for convenient use.

[0051] It should be noted that the large bearings and bearings described in this embodiment are all ball bearings, or other bearings that can achieve their functions can also be used, and no limitation is imposed here.

[0052] Embodiment Two

[0053] The present invention provides a method for using a drying device for lithium hydroxide monohydrate powder, including the above-mentioned drying device, and further including the following steps:

[0054] S1: Open the cover 112 at one end of the outer cylinder 11 close to the feed port 121, and open the buckle cover 6 at the feed port 121, and add 100L - 500L of lithium hydroxide monohydrate powder into the inner cylinder 12.

[0055] S2: After adding, cover both the cover 112 and the buckle cover 6 to achieve sealing, and then start multiple heating sheets 3.

[0056] S3: Start the reduction motor 21 simultaneously with step S2.

[0057] S4: The driving end of the reduction motor 21 drives the first bevel gear 221 to transmit power, so that the second bevel gear 222 meshing with the first bevel gear 221 and the second bevel gear 222 rotate, thereby driving the first rotating shaft 23 and the second rotating shaft 24 to rotate synchronously and reversely around their own axes, and the rotation speeds of the first rotating shaft 23 and the second rotating shaft 24 are 10 rpm - 30 rpm.

[0058] S5: The first rotating shaft 23 and the second rotating shaft 24 synchronously drive the outer cylinder 11 and the inner cylinder 12 to rotate reversely around the axis of the first rotating shaft 23, and the rotation speeds of the outer cylinder 11 and the inner cylinder 12 are 10 rpm - 30 rpm, so that multiple heating sheets 3 uniformly heat the inner cylinder 12 to perform heat dehydration treatment on the lithium hydroxide monohydrate in the inner cylinder 12.

[0059] S6: Multiple rotating shafts 411 rotate in the same direction as the rotation of the inner cylinder 12 in step S5, and moreover, each rotating shaft 411 rotates around its own axis in the same direction as the rotation direction relative to the inner cylinder 12 through the meshing of the first gear 42 and the second gear 412, and the rotation speed of the self-rotation of the rotating shaft 411 is 20 rpm - 40 rpm.

[0060] S7: According to step S5, multiple stirring rods 4131 rotate with the rotation of the rotating shaft 411 to stir the lithium hydroxide monohydrate powder in the inner cylinder 12.

[0061] S8: For the lithium hydroxide monohydrate powder and / or anhydrous lithium hydroxide powder adhering to the inner wall of the inner cylinder 12, the brush 4132 brushes it off through the stirring of multiple stirring rods 4131.

[0062] S9: After all the lithium hydroxide monohydrate powder is dehydrated and dried, turn off the reduction motor 21 to stop the movement of the outer cylinder 11, the inner cylinder 12, and the stirring device 4.

[0063] S10: Open the cover 112 at one end of the outer cylinder 11 close to the driving device 2, and open the fastening cover 6 at the discharge port 122 of the inner cylinder 12, and take out the dehydrated anhydrous lithium hydroxide powder from the inner cylinder 12.

[0064] S11: Continue to produce anhydrous lithium hydroxide powder according to steps S1 - S10, and details are not repeated here.

[0065] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0066] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0068] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0069] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A drying device for lithium hydroxide monohydrate powder, characterized in that: It comprises a mixing drum (1), a driving device (2) and a mixing device (4); The mixing drum (1) is arranged horizontally, and comprises an outer drum (11) and an inner drum (12) for containing lithium hydroxide monohydrate powder, the inner drum (12) being rotatably mounted in the outer drum (11), the inner drum (12) being coaxially arranged with the outer drum (11) and forming a sandwich therebetween, and a plurality of heating plates (3) being mounted on the inner wall of the outer drum (11) for heating the inner drum (12); The driving device (2) is respectively connected to the end wall of the inner cylinder (12) and the end wall of the outer cylinder (11) to drive the outer cylinder (11) and the inner cylinder (12) to rotate synchronously in opposite directions, so that the plurality of heating plates (3) heat the inner cylinder (12) uniformly; One end of the stirring device (4) is rotatably connected to the inner wall of the inner cylinder (12) close to the driving device (2), and the other end passes through the end wall of the inner cylinder (12) away from the driving device (2). The stirring device (4) can rotate synchronously with the rotation of the inner cylinder (12) around the axis of the inner cylinder (12), and at the same time rotate around the axis of the stirring device (4) itself, so as to stir the lithium hydroxide monohydrate powder in the stirring cylinder (1).

2. The drying device for lithium hydroxide monohydrate powder according to claim 1, characterized in that: The driving device (2) comprises a reduction motor (21), a transmission mechanism (22), a first rotating shaft (23) and a second rotating shaft (24); the fixed end of the reduction motor (21) is fixedly mounted on the top of the mounting platform (9); the output end of the reduction motor (21) is connected to the transmission mechanism (22); the first rotating shaft (23) and the second rotating shaft (24) are coaxially arranged; the first rotating shaft (23) is inserted into the second rotating shaft (24); one end of the first rotating shaft (23) and the second rotating shaft (24) are both connected to the transmission mechanism (22); the other ends of the first rotating shaft (23) and the second rotating shaft (24) are respectively connected to the end wall of the inner cylinder (12) and the end wall of the outer cylinder (11); The reduction motor (21) can drive the first rotating shaft (23) and the second rotating shaft (24) to rotate synchronously in opposite directions around their own axes through the transmission mechanism (22).

3. The drying device for lithium hydroxide monohydrate powder according to claim 2, characterized in that: The transmission mechanism (22) comprises a first bevel gear (221), a second bevel gear (222), a third bevel gear (223) and a protective shell (224); The second bevel gear (222) and the third bevel gear (223) are arranged opposite to each other, the second bevel gear (222) is rotatably mounted on the inner wall of the protective shell (224), and the first bevel gear (221) is vertically meshed with the second bevel gear (222) and the third bevel gear (223) respectively; One end of the first rotating shaft (23) is connected to the second bevel gear (222), and the other end passes through the protective shell (224) to be connected to the end wall of the inner cylinder (12); one end of the second rotating shaft (24) and the third bevel gear (223) and the other end passes through the protective shell (224) to be connected to the end wall of the outer cylinder (11); the output end of the reduction motor (21) passes through the bottom wall of the protective shell (224) to be connected to the first bevel gear (221); The reduction motor (21) is capable of driving the first bevel gear (221) to rotate, so that the first bevel gear (221) drives the second bevel gear (222) and the third bevel gear (223) to rotate synchronously in the opposite direction, thereby driving the first rotating shaft (23) and the second rotating shaft (24) to rotate synchronously in the opposite direction, thereby driving the outer cylinder (11) and the inner cylinder (12) to rotate synchronously in the opposite direction; The first rotating shaft (23), the second rotating shaft (24), the second bevel gear (222), the third bevel gear (223), the inner cylinder (12) and the outer cylinder (11) are coaxially arranged.

4. The drying device for lithium hydroxide monohydrate powder according to claim 1, characterized in that: The stirring device (4) comprises a plurality of stirring mechanisms (41) and a first gear (42); The plurality of stirring mechanisms (41) are all placed in the inner cylinder (12); the axes of the plurality of stirring mechanisms (41) are parallel to the axis of the inner cylinder (12); and the axis connecting the plurality of stirring mechanisms (41) is a square; each stirring mechanism (41) comprises a rotating shaft (411), a second gear (412), and a plurality of stirring components (413); The first gear (42) is fixedly mounted on an end wall of the inner cylinder (12) at an end away from the driving device (2) via a fixed shaft (8), and the axis of the first gear (42) is consistent with the axis of the inner cylinder (12); One end of the rotating shaft (411) is rotatably connected to the inner wall of the inner cylinder (12) at one end facing the driving device (2), and the other end passes through the side of the inner cylinder (12) away from the driving device (2) and is fixedly connected to the second gear (412) via a fixed shaft (8), and the second gear (412) is meshed with the first gear (42); A plurality of groups of stirring components (413) are arranged at intervals along the axis of the rotating shaft (411) and are vertically connected to the rotating shaft (411); the plurality of groups of stirring components (413) on the plurality of rotating shafts (411) correspond to each other one by one, and the axes of the corresponding plurality of groups of stirring components (413) on the plurality of rotating shafts (411) are located in the same vertical plane; The inner cylinder (12) can drive the plurality of rotating shafts (411) to rotate around the axis of the inner cylinder (12), thereby driving the plurality of second gears (412) to rotate around the axis of the first gear (42) and to rotate on their own, thereby driving the rotating shaft (411) to rotate on its own, thereby causing the plurality of stirring components (413) to rotate along with the rotation of the rotating shaft (411), thereby stirring the lithium hydroxide monohydrate powder in the inner cylinder (12).

5. The drying device for lithium hydroxide monohydrate powder according to claim 4, characterized in that: The stirring assembly (413) includes a plurality of stirring rods (4131); The plurality of stirring rods (4131) are vertically connected to the outer wall of the rotating shaft (411), and the plurality of stirring rods (4131) corresponding to the plurality of rotating shafts (411) are arranged in a staggered manner.

6. The drying device for lithium hydroxide monohydrate powder according to claim 5, characterized in that: A brush (4132) is installed at one end of each stirring rod (4131) away from the rotating shaft (411), and the end of the brush (4132) away from the stirring rod (4131) can slide and fit with the inner wall of the inner cylinder (12) to clean the inner wall of the inner cylinder (12).

7. The drying device for lithium hydroxide monohydrate powder according to claim 2, characterized in that: The drying device further comprises at least two mounting frames (5); At least two of the mounting frames (5) are vertically mounted on the top of the mounting platform (9), and the mixing drum (1) is rotatably mounted horizontally in the mounting frames (5) to support the mixing drum (1).

8. The drying device for lithium hydroxide monohydrate powder according to claim 1, characterized in that: Also includes two buckle covers (6); A feed port (121) and a discharge port (122) are respectively provided on the two side end walls of the inner cylinder (12), wherein the feed port (121) is located above the discharge port (122), and the two buckle covers (6) can be buckled on the feed port (121) and the discharge port (122) respectively to close the inner cylinder (12).

9. The drying device for lithium hydroxide monohydrate powder according to claim 1, characterized in that: The outer cylinder (11) comprises a cylinder body (111) and two sealing covers (112); The inner cylinder (12) is placed inside the cylinder (111), the plurality of heating plates (3) are mounted on the inner wall of the cylinder (111), and the two sealing covers (112) are respectively mounted on the two ends of the cylinder (111) to seal the cylinder (111).

10. A method for using a drying device for lithium hydroxide monohydrate powder, comprising the drying device according to any one of claims 1 to 9, characterized in that: The following steps are also included: S1: adding 100L-500L of lithium hydroxide monohydrate powder into the inner cylinder (12); S2: After the addition is completed, the plurality of heating plates (3) are activated to make the temperature of the inner cylinder (12) reach between 120° C. and 180° C., so as to reach the dehydration temperature of the lithium hydroxide monohydrate powder; S3: starting the driving device (2) simultaneously with step S2; S4: the driving device (2) synchronously drives the outer cylinder (11) and the inner cylinder (12) to rotate in opposite directions around their own axes at a speed of 10 rpm-30 rpm, so that the plurality of heating plates (3) uniformly heat the inner cylinder (12), thereby performing heating and dehydration treatment on the lithium hydroxide monohydrate in the inner cylinder (12); S5: the stirring device (4) rotates in the same direction as the inner cylinder (12) in step S5 at the same speed as the inner cylinder, and the stirring device (4) can simultaneously rotate around its own axis in the same direction as the rotation direction of the inner cylinder (12), and the rotation speed of the stirring device (4) is 20 rpm-40 rpm, so as to stir the lithium hydroxide monohydrate powder in the inner cylinder; S6: After the monohydrated lithium hydroxide powder is completely dehydrated and dried, the driving device (2) is stopped, and the dehydrated anhydrous lithium hydroxide powder is taken out from the inner cylinder (12).

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