Plate dryer for lithium carbonate

Abstract

The utility model discloses a disc dryer for lithium carbonate, which comprises a main shaft arranged in a machine shell along the vertical direction; the at least one drying disc is arranged on the main shaft in a sleeving mode, the drying disc and the main shaft move independently relative to each other, and a discharging gap is formed between the drying disc and the main shaft; the rake arm is connected with the main shaft and follows the main shaft; the scrapers are located on the drying disc and connected to the rake arm so as to rotate in the axial direction under the rotation action of the main shaft. According to the drying device, due to the fact that the discharging gaps are formed between the drying discs and the main shaft, materials on the drying discs can conveniently fall onto the next drying disc and finally flow out of the discharging opening of the bottommost drying disc, and drying of the materials is achieved.

Description

Technical Field

[0001] This utility model relates to a disc dryer for lithium carbonate. Background Technology

[0002] With the development of the new energy industry, lithium carbonate (Li2CO3), as a core raw material for lithium-ion batteries, has its purity and water content directly affecting battery performance. Industrial-grade lithium carbonate requires a water content of ≤0.2% after drying, while battery-grade lithium carbonate requires ≤0.1%. Traditional hot air drying technology suffers from high energy consumption (thermal efficiency of only 30%-40%) and serious dust pollution, while microwave drying and far-infrared drying are difficult to popularize due to large equipment investment and uneven heating of materials.

[0003] Currently, the dehydration and drying of lithium carbonate mainly uses a disc dryer. A disc dryer has multiple drying discs and scrapers. The lithium carbonate moves on the drying discs via the movement of the scrapers, and drying is achieved through water vapor and heat conduction from the disc surface. Therefore, disc dryers, with their high efficiency, energy saving, and closed-loop operation, have become the mainstream choice for lithium carbonate drying, and more than ten production lines have been successfully applied in China.

[0004] However, the battery-grade lithium carbonate dried using the above method is prone to being mixed with magnetic metal particles. The main reason is that when the disc dryer is running, the scraper mounted on the rake arm is prone to friction with the drying disc, generating magnetic metal particles, which affects the quality of the battery-grade lithium carbonate.

[0005] Meanwhile, due to the effect of thermal expansion and contraction, the inner shaft of the disc dryer will expand to a certain extent during the process of passing a heat source into the inner shaft. The expansion of the inner shaft along its own axis will cause the relative position between the discs fixed on it to change. This will cause the material adhering to the discs to be unable to be effectively scraped off, affecting the normal operation of the discs, and in severe cases, it may even cause damage to the disc dryer. Utility Model Content

[0006] The main purpose of this utility model is to provide a disc dryer for lithium carbonate, which aims to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides a disc dryer for lithium carbonate, comprising:

[0008] The main shaft is vertically mounted inside the machine housing;

[0009] At least one drying tray is sleeved on the main shaft and moves relatively independently of the main shaft, and there is a material discharge gap between the drying tray and the main shaft;

[0010] The rake arm is connected to and moves with the main shaft;

[0011] Multiple scrapers are located on the drying tray and connected to the rake arm to rotate axially under the rotation of the main shaft.

[0012] In one embodiment, there are multiple drying trays, which are spaced apart along the extension direction of the main shaft.

[0013] In one embodiment, the lithium carbonate disc dryer further includes a sliding structure disposed at the end of the rake arm away from the main shaft to rotate on the drying disc.

[0014] In one embodiment, a slide rail protrudes from the outer edge of the drying tray, and the sliding structure and the slide rail are connected in cooperation.

[0015] In one embodiment, the sliding structure includes a mounting clamp and a pulley. The mounting clamp is mounted on the end of the rake arm, and the pulley is connected to the mounting clamp and cooperates with the slide rail.

[0016] In one embodiment, the rake arm is provided with a fixing sleeve, a fixing frame, and a fixing block. The fixing sleeve is fitted onto and fixedly connected to the rake arm. The fixing block is connected to the scraper. Both ends of the fixing frame are respectively connected to the fixing sleeve and the fixing block.

[0017] In one embodiment, the lithium carbonate disc dryer further includes a fixing structure connected between the rake arm and the scraper.

[0018] In one embodiment, the fixing structure includes a fixing clamp, a support tube, and a pressure tube. The fixing clamp is fixedly installed on the rake arm. The support tube and the pressure tube are connected through a through hole in the fixing clamp. The support tube and the pressure tube are respectively located on the upper and lower sides of the fixing frame.

[0019] The technical solution of this utility model includes a lithium carbonate disc dryer comprising:

[0020] The main shaft is vertically mounted inside the machine housing;

[0021] At least one drying tray is sleeved on the main shaft and moves relatively independently of the main shaft, and there is a material discharge gap between the drying tray and the main shaft;

[0022] The rake arm is connected to and moves with the main shaft;

[0023] Multiple scrapers are located on the drying tray and connected to the rake arm to rotate axially under the rotation of the main shaft.

[0024] Therefore, in this technical solution, when the main shaft rotates, it can drive the rake arm connected to it to rotate. The rotation of the rake arm can drive the scraper to rotate, so that the scraper moves on the drying tray and spreads the material on the drying tray evenly for drying. At the same time, since there is a material drop gap between the drying tray and the main shaft, the material on the drying tray can easily fall onto the next drying tray and finally flow out from the discharge port of the bottom drying tray, thus achieving the drying of the material. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a disc dryer for lithium carbonate according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the lithium carbonate disc dryer from another perspective, representing an embodiment of the present invention.

[0028] Explanation of reference numerals: 10, main shaft; 20, drying tray; 21, slide rail; 30, rake arm; 31, fixing sleeve; 32, fixing frame; 33, fixing block; 40, scraper; 50, sliding structure; 51, mounting clamp; 52, pulley; 60, fixing structure; 61, fixing clamp; 62, support tube; 63, pressing tube.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] This invention provides a disc dryer for lithium carbonate, which is applicable to the drying of materials such as lithium carbonate.

[0035] like Figure 1-2 As shown, the lithium carbonate disc dryer provided in this embodiment of the present invention includes:

[0036] The main shaft 10 is vertically mounted inside the machine housing;

[0037] At least one drying tray 20 is sleeved on the main shaft 10 and moves relatively independently from the main shaft 10, and there is a material discharge gap between the drying tray 20 and the main shaft 10;

[0038] The rake arm 30 is connected to and moves with the main shaft 10;

[0039] Multiple scrapers 40 are located on the drying tray 20 and connected to the rake arm 30 to rotate axially under the rotation of the main shaft 10.

[0040] In this embodiment, the main shaft 10 passes through the hole in the drying tray 20 and is connected to the drive device. Since there is a gap between the drying tray 20 and the main shaft 10, they do not contact each other. Therefore, the drying tray 20 will not rotate with the main shaft 10. When the main shaft 10 rotates, it can drive the rake arm 30 connected to it to rotate. The rotation of the rake arm 30 can drive the scraper 40 to rotate, so that the scraper 40 moves on the drying tray 20 and spreads the material on the drying tray 20 evenly for drying. At the same time, since there is a material drop gap between the drying tray 20 and the main shaft 10, the material on the drying tray 20 can easily fall onto the next drying tray 20 and finally flow out from the discharge port of the bottom drying tray 20, thus achieving the drying of the material.

[0041] Optionally, there may be multiple drying trays 20, which are spaced apart along the extension direction of the main shaft 10 to accommodate the drying of different materials. Similarly, there may also be multiple rake arms 30, which are spaced apart along the circumference of the drying trays 20.

[0042] In addition, the lithium carbonate tray dryer also includes a sliding structure 50, which is disposed at the end of the rake arm 30 away from the main shaft 10 to rotate on the drying tray 20. The outer edge of the drying tray 20 is provided with a slide rail 21. The sliding structure 50 and the slide rail 21 are connected and cooperate with each other. The sliding structure 50 includes a mounting clamp 51 and a pulley 52. ​​The mounting clamp 51 is installed at the end of the rake arm 30. The pulley 52 is connected to the mounting clamp 51 and cooperates with the slide rail 21.

[0043] The pulley 52 is made of PEEK engineering plastic, while the bearing inside the pulley 52 and the mounting clamp 51 above it are made of stainless steel (316L). The annular slide rail 21 is also made of stainless steel (316L). The pulley 52 is fixedly connected to the rake arm 30 and is mounted on the slide rail 21. The rotation of the rake arm 30 drives the pulley 52 to move on the slide rail 21. The pulley 52 and slide rail 21 can raise the rake arm 30, preventing it from bending and deforming downwards due to the excessive number of scrapers 40 installed and long-term operation. This reduces the friction between the scrapers 40 and the disc surface, thereby reducing the generation of magnetic metal particles. Furthermore, the sliding friction between the PEEK engineering plastic pulley 52 and the stainless steel (316L) slide rail 21 can also reduce the generation of magnetic metal particles.

[0044] Meanwhile, the pulley 52 is detachably connected to the clamp, which facilitates the replacement of the pulley 52 and allows the mounting clamp 51 to be adapted to pulleys 52 of various radii to meet the needs of different rake heights.

[0045] To prevent magnetic metal particles from mixing into lithium carbonate, pulley 52 in this specific embodiment is a non-metallic wheel, such as made of PEEK material.

[0046] In addition, the rake arm 30 is provided with a fixing sleeve 31, a fixing frame 32, and a fixing block 33. The fixing sleeve 31 is fitted onto the rake arm 30 and fixedly connected to it. The fixing block 33 is connected to the scraper 40. The two ends of the fixing frame 32 are respectively connected to the fixing sleeve 31 and the fixing block 33. The structure of the fixing sleeve 31, fixing frame 32, and fixing block 33 can effectively improve the stability of the lithium carbonate disc dryer during operation.

[0047] In addition, the lithium carbonate drying disc also includes a fixing structure 60, which is connected between the rake arm 30 and the scraper 40. The fixing structure 60 includes a fixing clamp 61, a support tube 62, and a pressure tube 63. The fixing clamp 61 is fixedly installed on the rake arm 30. The support tube 62 and the pressure tube 63 pass through the through hole on the fixing clamp 61 and are connected. The support tube 62 and the pressure tube 63 are respectively located on the upper and lower sides of the fixing frame 32. In this embodiment, the support tube 62 and the pressure tube 63 can limit the fixing frame 32 between the two, preventing the fixing frame 32 from causing the scraper to jump, and further improving stability.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A tray drier for lithium carbonate, characterized by, The lithium carbonate drying disc dryer includes: The main shaft (10) is vertically mounted inside the machine housing; At least one drying disc (20) is sleeved on the main shaft (10) and moves independently relative to the main shaft (10), and there is a material discharge gap between the drying disc (20) and the main shaft (10); The rake arm (30) is connected to the main shaft (10) and moves along the main shaft (10). Multiple scrapers (40) are located on the drying disc (20) and connected to the rake arm (30) to rotate axially under the rotation of the main shaft (10).

2. The lithium carbonate tray drier according to claim 1, characterized by, The number of drying trays (20) is multiple, and the multiple drying trays (20) are spaced apart along the extension direction of the main shaft (10).

3. The lithium carbonate tray drier according to claim 1, characterized by, The lithium carbonate disc dryer also includes a sliding structure (50), which is disposed at one end of the rake arm (30) away from the main shaft (10) to rotate on the drying disc (20).

4. The lithium carbonate tray drier according to claim 3, wherein The outer edge of the drying tray (20) is provided with a slide rail (21), and the sliding structure (50) and the slide rail (21) are connected in cooperation.

5. The lithium carbonate tray drier according to claim 4, wherein The sliding structure (50) includes a mounting clamp (51) and a pulley (52). The mounting clamp (51) is mounted on the end of the rake arm (30). The pulley (52) is connected to the mounting clamp (51) and cooperates with the slide rail (21).

6. The lithium carbonate tray drier according to claim 1, wherein The rake arm (30) is provided with a fixing sleeve (31), a fixing frame (32) and a fixing block (33). The fixing sleeve (31) is fitted onto the rake arm (30) and fixedly connected to the rake arm (30). The fixing block (33) is connected to the scraper (40). The two ends of the fixing frame (32) are respectively connected to the fixing sleeve (31) and the fixing block (33).

7. The lithium carbonate tray drier according to claim 6, wherein The lithium carbonate drying disc also includes a fixing structure (60) connected between the rake arm (30) and the scraper (40).

8. The lithium carbonate tray dryer of claim 7, wherein, The fixing structure (60) includes a fixing clamp (61), a support tube (62), and a pressure tube (63). The fixing clamp (61) is fixedly installed on the rake arm (30). The support tube (62) and the pressure tube (63) are connected through the through hole on the fixing clamp (61). The support tube (62) and the pressure tube (63) are respectively located on the upper and lower sides of the fixing frame (32).

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