A tray dryer for preventing material from falling

Abstract

The utility model provides a kind of disc dryer to prevent material from falling, more particularly to material drying technical field, to solve the technical problem that material is easily due to centrifugal force exceeds baffle edge constraint or interlayer sliding effect from edge falling in prior art.The device includes shell, multiple layers of disc body are equipped in shell, and center driving shaft is passed through the center of disc body;Each layer of disc body is equipped with material flow guide structure, stirring dispersion mechanism, disc surface antiskid structure, parameter control structure and airflow auxiliary structure;Stirring dispersion mechanism is fixedly connected with center driving shaft;Disc body center is equipped with material drop opening;Hot air passage is surrounded in the periphery of multiple layers of disc body and is communicated with the chamber of disc body;Each layer of airflow auxiliary structure is communicated with the hot air passage.The device is effectively prevented from moving and falling to disc body edge by the triple protection structure of stepped baffle edge, centripetal airflow barrier and wear-resistant antiskid layer, compared with traditional disc dryer, material waste can be effectively reduced, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of material drying technology, and more specifically, to a disc dryer that prevents materials from falling off. Background Technology

[0002] In the production process of lithium salts, granular materials need to be dried using a disc dryer (i.e., a disc dryer). The drying process is achieved through the combined action of heat transfer from the disc surface and hot air. Existing disc dryers are mainly divided into two types according to their structure: single-layer disc dryers and multi-layer disc dryers. Among them, the multi-layer disc dryer structure has become the mainstream choice for large-scale material drying due to its advantages of small footprint and high processing efficiency. However, existing multi-layer disc dryers still have the following prominent technical problems in practical applications: When the discs of existing multi-layer disc dryers rotate, they drive the material to spread across the disc surface through centrifugal force. However, the centrifugal force increases with the increase of the disc radius, easily causing material to concentrate and accumulate at the edge of the disc. If the edge retaining design is simple, such as a single-height straight edge, the material is prone to fall from the edge due to the centrifugal force exceeding the retaining constraint or the interlayer sliding effect, resulting in material loss and internal equipment contamination. This problem is particularly pronounced for highly fluid materials, such as fine particles in the later stages of drying. Utility Model Content

[0003] The purpose of this utility model is to provide a disc dryer that prevents materials from falling off, which can solve the technical problem in the prior art of high risk of materials falling off the edge of the disc and resulting in large material losses.

[0004] The embodiments of this utility model are achieved through the following technical solutions: A disc dryer for preventing material drop includes a housing with an inlet and an outlet at the top and bottom, respectively. Inside the housing are multiple discs fixed vertically, and a central drive shaft passing through the center of each disc. Each disc layer has a material guiding structure, a stirring and dispersing mechanism, a disc surface anti-slip structure, a parameter control structure, and an airflow assist structure. The stirring and dispersing mechanism is fixedly connected to the central drive shaft and is driven to rotate by the central drive shaft. A material discharge port is located at the center of each disc. The central drive shaft is driven to rotate by a variable frequency motor. A hot air channel surrounds the periphery of the multiple discs and communicates with the chambers of the discs. The airflow assist structures in each layer are connected to the hot air channel.

[0005] In some embodiments, the material guiding structure includes a stepped baffle arranged circumferentially along the top edge of the disc body. The stepped baffle is composed of radially distributed multi-level baffle rings. The inner sidewall of each level of the baffle ring is provided with an inclined guiding surface. The surface of the inclined guiding surface is provided with a guiding groove adapted to the stirring direction. The top of the outermost baffle ring is provided with an elastic buffer strip.

[0006] In some embodiments, the stirring and dispersing mechanism includes a stirring paddle that is uniformly distributed and fixed around the outer periphery of the central drive shaft. The stirring paddle is disposed above the surface of the disc body. A plurality of scrapers are arranged parallel to the stirring paddle and the disc body. The scrapers are inclined to the tangential direction of the disc body to guide the material toward the center of the disc body. The bottom of the scraper is serrated. The scraper is close to the disc surface of the disc body, and the end of the scraper is in contact with the innermost baffle ring in the material guiding structure.

[0007] In some embodiments, the anti-slip structure of the disc surface is a wear-resistant anti-slip layer on the upper surface of the disc body, and the surface of the wear-resistant anti-slip layer is provided with anti-slip textures in the radial direction to enhance the friction between the material and the disc surface.

[0008] In some embodiments, the parameter control structure includes a weighing sensor disposed on the top surface of the disc body, an infrared temperature sensor disposed on the bottom of the disc body with its detection end facing downwards, and a frequency converter electrically connected to the frequency converter motor of the central drive shaft.

[0009] In some embodiments, the airflow assist structure includes a plurality of air nozzles surrounding the top of the outermost edge ring of the material guide structure. The air outlet direction of the air nozzles is obliquely towards the center of the disc body and consistent with the guiding direction of the scraper, forming a centripetal airflow barrier.

[0010] In some embodiments, an adjustable gate is provided at the material discharge port at the center of the disc.

[0011] In some embodiments, a guide hopper is provided between adjacent discs, the upper port of the guide hopper is connected to the upper material discharge port, and the lower port extends above the working area of ​​the stirring and dispersing mechanism of the lower disc.

[0012] In some embodiments, the central drive shaft is detachably connected to the stirring paddles of each layer.

[0013] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: 1. This device effectively prevents materials from moving to the edge of the disc and falling off through a triple protection structure of stepped side guards, centripetal airflow barrier and wear-resistant anti-slip layer. Compared with traditional disc dryers, it can effectively reduce material waste and improve production efficiency. 2. This device uses a combination of multi-layer discs, a stirring paddle, and the heat conduction and convection of hot air to form a uniform material layer on the discs, ensuring full contact between the material and the disc surface and the hot air, resulting in higher drying efficiency. At the same time, the interlayer synergistic drying ensures uniform drying of the material, avoiding local overheating or insufficient drying, and significantly improving product quality. 3. This device monitors the thickness and temperature of material accumulation in real time through weighing sensors and infrared temperature sensors. The control system intelligently adjusts the feed rate, stirring speed, hot air temperature, etc. according to preset parameters and real-time data, so as to achieve precise control of the operation status of the disc dryer, effectively avoid problems such as material accumulation and overheating, improve the stability of the device operation, and reduce downtime due to failure. 4. This device adopts an adjustable gate and guide hopper design to precisely control the interlayer transfer speed and landing point of materials, prevent material blockage and deviation, ensure that materials smoothly enter the effective processing area of ​​the lower plate, greatly improve production continuity, reduce the frequency of manual cleaning and intervention, and reduce labor costs. Attached Figure Description To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Fig. 1 This is a schematic diagram of the structure of a disc dryer for preventing material from falling, provided in an embodiment of the present invention; Fig. 2 This is a schematic diagram of the structure of the uppermost disc provided in an embodiment of the present invention; Fig. 3 This is a top view of the uppermost disc in an embodiment of the present invention.

[0015] Icons: 1. Shell; 2. Inlet; 3. Outlet; 4. Disc; 5. Central drive shaft; 6. Material discharge port; 7. Variable frequency motor; 8. Hot air channel; 9. Side ring; 10. Agitator; 11. Scraper; 12. Anti-slip texture; 13. Weighing sensor; 14. Infrared temperature sensor; 15. Air nozzle; 16. Adjustable gate; 17. Guide hopper; 18. Exhaust port; 19. Exhaust fan; 20. Elastic buffer strip. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figs. 1-3 As shown, the main body of this embodiment is a disc dryer to prevent material from falling. The disc dryer includes a housing 1 with an inlet 2 and an outlet 3 at its upper and lower ends, respectively. Inside the housing 1 are multiple discs 4 fixedly arranged vertically, and a central drive shaft 5 penetrating the center of each of the multiple discs 4. Each disc 4 has a material guiding structure, a stirring and dispersing mechanism, a disc surface anti-slip structure, a parameter control structure, and an airflow assist structure. The stirring and dispersing mechanism is fixedly connected to the central drive shaft 5 and is driven to rotate by the central drive shaft 5. A material discharge port 6 is located at the center of each disc 4. The central drive shaft 5 is driven to rotate by a variable frequency motor 7. A hot air channel 8 surrounds the periphery of the multiple discs 4 and communicates with the chambers of the discs 4. The airflow assist structures of each layer are connected to the hot air channel 8.

[0022] Furthermore, the material guiding structure includes a stepped baffle arranged circumferentially along the top edge of the disc 4. The stepped baffle is composed of radially distributed multi-level baffle rings 9. The inner sidewall of each level of the baffle ring 9 is provided with an inclined guiding surface. The inclined guiding surface is provided with a guiding groove adapted to the stirring direction. The top of the outermost baffle ring 9 is provided with an elastic buffer strip 20.

[0023] Furthermore, the stirring and dispersing mechanism includes a stirring paddle 10 that is uniformly distributed and fixed around the outer periphery of the central drive shaft 5. The stirring paddle 10 is positioned above the surface of the disc body 4. A plurality of scrapers 11 are arranged parallel to the stirring paddle 10 and the disc body 4. The scrapers 11 are inclined to the tangential direction of the disc body 4 to guide the material to move toward the center of the disc body 4. The bottom of the scraper 11 is serrated. The scraper 11 is close to the disc surface of the disc body 4, and the end of the scraper 11 is in contact with the innermost baffle ring 9 in the material guiding structure.

[0024] Furthermore, the anti-slip structure of the disc surface is a wear-resistant and anti-slip layer on the upper surface of the disc body 4, and the surface of the wear-resistant and anti-slip layer is provided with anti-slip textures 12 in the radial direction to enhance the friction between the material and the disc surface.

[0025] Furthermore, the parameter control structure includes a weighing sensor 13 disposed on the top surface of the disc 4, an infrared temperature sensor 14 disposed on the bottom of the disc 4 with the detection end facing downwards, and a frequency converter controller electrically connected to the frequency converter motor 7 of the central drive shaft 5.

[0026] Furthermore, the airflow assist structure includes multiple air nozzles 15 surrounding the top of the outermost edge ring 9 of the material guide structure. The air outlet direction of the air nozzles 15 is obliquely towards the center of the disc body 4, consistent with the guiding direction of the scraper 11, forming a centripetal airflow barrier.

[0027] Furthermore, an adjustable gate 16 is provided at the material discharge port 6 at the center of the disc 4.

[0028] Furthermore, a guide hopper 17 is provided between adjacent discs 4. The upper port of the guide hopper 17 is connected to the upper material discharge port 6, and the lower port extends to the area above the working area of ​​the stirring and dispersing mechanism of the lower disc 4.

[0029] Furthermore, the central drive shaft 5 is detachably connected to the stirring paddles 10 of each layer.

[0030] It is worth mentioning that the top of the housing is provided with a dehumidification port 18, and the outer end of the dehumidification port is connected to a fan 19.

[0031] The operating procedure of this device is as follows: Set the parameters of the tray dryer according to the characteristics of the material to be dried. For heat-sensitive materials, the temperature threshold of the infrared temperature sensor 14 must be set in advance to prevent the material from overheating and deteriorating.

[0032] Next, check whether each layer of the disc 4 is fixed firmly, and whether the stepped sidewalls, stirring paddle 10, air nozzle 15 and other components are loose or damaged; confirm that the adjustable gate 16 is in the closed state and the guide hopper 17 is tightly connected to prevent material leakage; check whether the detachable connection between the central drive shaft 5 and the stirring paddle 10 is firm to ensure that the transmission system is normal.

[0033] After the inspection is completed, the system is started. First, the feed inlet 2 is opened, and the material enters the housing 1 through the feed inlet 2, falling onto the surface of the uppermost disc 4. At this time, the adjustable gate 16 slowly opens according to a preset program to control the feeding speed and flow rate of the material, ensuring that the material is evenly distributed on the disc 4.

[0034] Subsequently, the variable frequency motor 7 drives the central drive shaft 5 to rotate, causing the stirring paddles 10 in each layer to rotate. The bottom of the serrated scraper 11 disperses and stirs the material, forming a uniform material layer on the disc 4, while ensuring full contact with the wear-resistant and anti-slip layer of the disc surface to prevent material from sliding and accumulating. At the same time, the inclined scraper 11 of the stirring paddle 10 guides the material towards the center of the disc 4, while the hot air channel 8 introduces hot air into the cavity inside the disc 4, thereby drying the material on the surface of the disc 4. The hot air in the hot air channel 8 is blown obliquely towards the center of the disc 4 through the air nozzle 15, consistent with the guiding direction of the scraper 11, forming a centripetal airflow barrier. This prevents the material from moving towards the edge of the disc 4 and from falling off, while also accelerating the evaporation of moisture from the material surface, enhancing the drying effect.

[0035] After the material in the upper disc 4 has been stirred and dried to a certain extent, the adjustable gate 16 is further opened. Under the guidance of the scraper 11, the material falls into the guide hopper 17 through the material discharge port 6. The guide hopper 17 accurately guides the material to the area above the stirring and dispersing mechanism of the lower disc 4 for the next round of stirring and drying.

[0036] In addition, the weighing sensor 13 monitors the weight change of the material on the disc 4 in real time and converts it into stacking thickness data; the infrared temperature sensor 14 detects the temperature of the material and transmits the data to the control system in real time. Operators can view the status information of the material in each layer of the disc 4, including stacking thickness and temperature, through the monitoring interface of the control system.

[0037] It is worth mentioning that the control system adopts an industrial PLC, which analyzes and judges based on preset drying process parameters and real-time monitoring data. If the material accumulation thickness of a certain layer of disc 4 exceeds the threshold, the system automatically adjusts the adjustable gate 16 to reduce the feed rate, while increasing the rotation speed of the stirring paddle 10 in that layer to enhance material dispersion; if the material temperature is close to the threshold set by the infrared temperature sensor 14, the system adjusts the hot air temperature and flow rate of the hot air channel 8 to prevent the material from overheating.

[0038] Once the material has finished drying and is discharged from the outlet 3 of the bottom tray 4, close the inlet 2, gradually reduce the speed of the variable frequency motor 7, and stop the rotation of the central drive shaft 5 and the stirring paddle 10; close the hot air channel 8 and stop the hot air supply.

[0039] This device forms multiple layers of protection for the edge of the disc body 4 through multi-stage baffle rings 9 with stepped baffles. During operation, when the material moves towards the edge of the disc body 4 under the action of centrifugal force, it first encounters the obstruction of the inner baffle ring 9. The inclined guide surface and guide groove guide the material to flow in a specific direction, avoiding the material from directly impacting the baffle. The elastic buffer strip 20 at the top of the outermost baffle ring 9 can buffer the impact force of the material and prevent the material from being bounced off the disc body 4 due to collision.

[0040] In addition, the hot air blown out of the nozzle 15 at an angle to the center of the disc 4 forms a centripetal airflow barrier, which is consistent with the direction of the stirring paddle 10 guiding the material. This generates a thrust on the material toward the center of the disc 4, counteracting the tendency of the material to move toward the edge and further preventing the material from falling.

[0041] It is worth mentioning that the anti-slip texture 12 on the surface of the wear-resistant and anti-slip layer increases the friction between the material and the disc surface, making the material relatively stable on the disc surface, less prone to sliding and accumulation, and reducing the risk of the material falling off due to sliding to the edge.

[0042] In addition, the disc 4 acts as a heat transfer medium, transferring heat to the material through heat conduction, causing the moisture inside the material to evaporate; the hot air in the hot air channel 8 exchanges heat with the surface of the material, carrying away the evaporated moisture, thus achieving convection drying. The stirring paddle 10 continuously stirs the material, ensuring full contact between the material and the disc surface and the hot air, improving heat and mass transfer efficiency, and accelerating the drying speed.

[0043] Secondly, the multi-layer disc design allows materials to be dried sequentially on different layers. After initial drying on the upper disc 4, the material falls into the lower disc 4 for further drying, extending the drying time and ensuring uniform and thorough drying. The control system allows for independent adjustment of parameters such as the hot air temperature and stirring speed of each disc 4, adapting to the needs of materials at different drying stages. The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disc dryer for preventing material from falling off, characterized in that, The device includes a housing (1) with an inlet (2) and an outlet (3) at its upper and lower ends, respectively. Inside the housing (1) are multiple layers of discs (4) fixedly arranged in the vertical direction, and a central drive shaft (5) passing through the center of the multiple layers of discs (4). Each layer of discs (4) is provided with a material guiding structure, a stirring and dispersing mechanism, a disc surface anti-slip structure, a parameter control structure, and an airflow auxiliary structure. The stirring and dispersing mechanism is fixedly connected to the central drive shaft (5) and is driven to rotate by the central drive shaft (5). The center of the disc (4) is provided with a material drop outlet (6). The central drive shaft (5) is driven to rotate by a variable frequency motor (7). A hot air channel (8) surrounds the periphery of the multiple layers of discs (4) and communicates with the chamber of the discs (4). The airflow auxiliary structure of each layer is connected to the hot air channel (8).

2. The tray drier for preventing material from falling according to claim 1, wherein The material guiding structure includes a stepped baffle arranged circumferentially along the top edge of the disc (4). The stepped baffle is composed of radially distributed multi-level baffle rings (9). The inner sidewall of each level of the baffle ring (9) is provided with an inclined guiding surface. The surface of the inclined guiding surface is provided with a guiding groove adapted to the stirring direction. The top of the outermost baffle ring (9) is provided with an elastic buffer strip (20).

3. The tray drier for preventing material from falling according to claim 2, wherein The stirring and dispersing mechanism includes a stirring paddle (10) that is uniformly distributed and fixed around the outer periphery of the central drive shaft (5). The stirring paddle (10) is positioned above the surface of the disc body (4). Several scrapers (11) are arranged parallel to the stirring paddle (10) and the disc body (4). The scrapers (11) are inclined to the tangential direction of the disc body (4) to guide the material to move toward the center of the disc body (4). The bottom of the scraper (11) is serrated. The scraper (11) is close to the disc surface of the disc body (4), and the end of the scraper (11) is in contact with the innermost baffle ring (9) in the material guiding structure.

4. The tray drier for preventing material from falling according to claim 1, wherein The anti-slip structure of the disc surface is a wear-resistant and anti-slip layer on the upper surface of the disc body (4), and the surface of the wear-resistant and anti-slip layer is provided with anti-slip textures (12) in the radial direction to enhance the friction between the material and the disc surface.

5. The anti-dumping tray dryer of claim 1, wherein, The parameter control structure includes a weighing sensor (13) disposed on the top surface of the disc (4), an infrared temperature sensor (14) disposed on the bottom of the disc (4) with the detection end facing downward; and a frequency converter controller electrically connected to the frequency converter motor (7) of the central drive shaft (5).

6. The tray drier for preventing material from falling according to claim 3, wherein The airflow assist structure includes multiple air nozzles (15) surrounding the top of the outermost edge ring (9) of the material guide structure. The air outlet direction of the air nozzles (15) is oblique to the center of the disc (4) and consistent with the guiding direction of the scraper (11), forming a centripetal airflow barrier.

7. The anti-dumping tray dryer of claim 1, wherein, An adjustable gate (16) is provided at the material discharge port (6) at the center of the disc (4).

8. The tray drier for preventing material from falling according to claim 7, wherein A guide hopper (17) is provided between adjacent discs (4). The upper port of the guide hopper (17) is connected to the upper material discharge port (6), and the lower port extends to the area above the working area of ​​the stirring and dispersing mechanism of the lower disc (4).

9. The tray drier for preventing material from falling according to claim 3, wherein The central drive shaft (5) is detachably connected to the stirring paddles (10) of each layer.

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