A rotary dryer suitable for drying wet material

Abstract

The utility model discloses a kind of rotary driers suitable for wet material drying, it is related to drying technical field.The utility model includes rotary cylinder, rotary cylinder is hollow structure, rotary cylinder is inclinedly arranged, head assembly is provided on rotary cylinder, head assembly includes bearing that is symmetric interference connection in the both ends of rotary cylinder, the positive cover abutting at one end of rotary cylinder is rotatably connected on one bearing, the reverse cover abutting at the other end of rotary cylinder is rotatably connected on another bearing;Driving assembly is provided on rotary cylinder.The utility model sets up head assembly, simplifies the feeding and discharging process of wet material, reduces the workload of staff, and sets up driving assembly, the rotation of rotary cylinder makes material be lifted, scatter, form material curtain;Meanwhile, by internal agitator, material is forced to agitate, the two kinds of movement compound effect greatly enhance the mixing and heat exchange efficiency of material, scraper simultaneously clean wet material on rotary cylinder inner wall, reduce the waste of wet material.

Description

Technical Field

[0001] This utility model belongs to the field of drying technology, and in particular relates to a rotary dryer suitable for drying wet materials. Background Technology

[0002] Lithium-ion batteries possess three key characteristics in the current battery industry: high volumetric energy density and high gravimetric energy density, as well as being rechargeable and pollution-free. The components of a lithium-ion battery include a positive electrode, a negative electrode, a separator, an electrolyte, a casing, conductive agents, and binders. The negative electrode, through its layered structure, reversibly inserts and extracts lithium ions. The conductivity, chemical stability, and structural reversibility of the negative electrode directly affect the battery's energy density, cycle life, and low-temperature performance. During discharge, the negative electrode undergoes an oxidation reaction to store lithium ions; during charging, it undergoes a reduction reaction to release lithium ions back into the circuit. Because petroleum coke, needle coke, pitch coke, and graphite all possess characteristics of high rate capability, long cycle life, and high capacity, they are used in the production of lithium-ion batteries. Before being put into use, petroleum coke, needle coke, pitch coke, and graphite need to be dried using a dryer. The purpose of drying petroleum coke, needle coke, pitch coke, and graphite is to remove physically adsorbed water (free water) from the surface of the materials to meet the moisture requirements of subsequent production processes, thereby ensuring product quality, production safety, and process stability.

[0003] A search revealed a patent document with publication number CN220062391U, which discloses a raw material drying device for graphite electrode processing. The device includes a support leg, a working plate fixedly mounted on the top of the support leg, a rotary drying mechanism fixedly mounted on the top of the working plate, and an air extraction mechanism fixedly mounted on the top of the rotary drying mechanism. Through the rotary drying mechanism, graphite is placed inside a feeding box during use, inserted into the inner side of a locking block, and then fixed in place. A motor and heating rod are then driven, causing the motor's drive shaft to rotate the feeding box. This ensures more even heat distribution, and the feeding box rotates and sways inside the locking block, adjusting the position of the graphite inside to guarantee uniform heating and prevent the graphite from failing to conduct heat, thus improving the efficiency of the drying device when drying graphite.

[0004] However, existing raw material drying devices for graphite electrode processing still have the following drawbacks in practical use: 1. The telescopic rod is fixedly installed on the inner side of the fixed plate. A locking block is fixedly installed on the inner side of the telescopic rod. A spring is fixedly installed on the outer side of the locking block. A material box is slidably installed on the inner side of the locking block. An internal thread block is fixedly installed on the front of the material box. A screwing thread rod is installed on the internal thread of the internal thread block. This allows the material box to shake inside the shaking locking assembly by shaking, so as to shake the graphite to make it heat evenly. However, this will require repeatedly opening and closing the drying chamber door and disassembling the entire material box when loading and unloading materials. The operation steps are cumbersome. This not only increases the workload of the staff and the downtime of the equipment, but also ultimately reduces the overall drying efficiency of the wet material. 2. The drying chamber is fixedly installed on the top of the working plate. Heating rods are fixedly installed on the inner sides of both the top and bottom of the drying chamber. A motor base is fixedly installed on the left side of the drying chamber, and a motor is fixedly installed inside the motor base. A first connecting block is fixedly installed on the right side of the motor's drive shaft. A second connecting block is fixedly installed on the inner side of the first connecting block. Fixing plates are fixedly installed on the outer side of the first connecting block and the back of the second connecting block to facilitate the rotational drying of graphite by the drying assembly. The first connecting block is rotatably installed on the inner right side of the drying chamber. The drying chamber and the motor drive... A hole is provided at the corresponding position of the shaft, and the drive shaft of the motor is rotatably installed inside the hole inside the drying box, which facilitates the rotation of the feeding box under normal conditions. However, during the rotation of the feeding box, it can only rotate in one direction, resulting in poor activity of the wet material inside the feeding box. This affects the contact effect between the wet material and heat, reduces the drying efficiency of the wet material, and at the same time, some wet material will stick to the inner wall of the feeding box. It is difficult to clean the wet material on the inner wall of the feeding box in time, which will cause incomplete discharge of the wet material inside the feeding box and increase the waste of wet material.

[0005] To address these issues, we provide a rotary dryer suitable for drying wet materials. Utility Model Content

[0006] The purpose of this invention is to provide a rotary dryer suitable for drying wet materials. By setting fixed forward and reverse covers supported by bearings, the feeding, discharging, and hot air pipelines do not need to move when the rotary drum rotates, thus greatly simplifying the loading and unloading process and reducing operational intensity and equipment complexity. Simultaneously, the drive assembly rotates the drum, and combined with the internal independent agitator and scraper, a compound stirring and tumbling effect is achieved on the wet material. This not only ensures more uniform heating and higher drying efficiency but also automatically cleans the drum wall, reducing material residue and waste, thereby solving the technical problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a rotary dryer suitable for drying wet materials, comprising a rotary drum, which is a hollow structure and is inclined. A head assembly is provided on the rotary drum, the head assembly including bearings symmetrically interference-fitted at both ends of the rotary drum. A forward-facing cover rotatably connected to one bearing abuts against one end of the rotary drum, and a reverse-facing cover rotatably connected to the other bearing abuts against the other end of the rotary drum. A drive assembly is provided on the rotary drum, the drive assembly including a driven gear sleeved on the outer circumference of the rotary drum, a drive gear meshing below the driven gear. A stirring motor is mounted on the outer wall of the forward-facing cover, the output end of the stirring motor is connected to a stirring shaft, the stirring shaft extends through the forward-facing cover into the interior of the rotary drum, a stirring rod is connected to the periphery of the stirring shaft, and a scraper connected to the end of the stirring rod abuts against the inner wall of the rotary drum.

[0008] The present invention is further configured such that the forward limiting ring fixed to the circumference of the rotating cylinder is located on the side closer to the forward cover, and the reverse limiting ring fixed to the circumference of the rotating cylinder is located on the side closer to the reverse cover, and a sealing ring is provided on the side wall of both the forward limiting ring and the reverse limiting ring.

[0009] The present invention is further configured such that a threaded plug is threadedly connected to the feed hopper connected to the outer wall of the forward-facing cover, the hot air inlet pipe connected to the outer wall of the forward-facing cover is located below the feed hopper, the exhaust pipe is connected to the outer wall of the reverse-facing cover, and the discharge pipe connected to the outer wall of the reverse-facing cover is located below the exhaust pipe.

[0010] The present invention is further configured such that a forward support foot is installed on the lower surface of the forward-facing cover, and a reverse support foot is installed on the lower surface of the reverse-facing cover.

[0011] The present invention is further configured such that a controller is installed on the outer wall of the reverse cover, a terminal socket is embedded in the reverse cover, and a temperature sensor is installed on the inner wall of the reverse cover.

[0012] The present invention is further configured such that a protective shell is fitted on the rotating cylinder, the driving gear and the driven gear are both located inside the protective shell, and cover plates are installed on both sides of the protective shell, the cover plates being fitted on the rotating cylinder.

[0013] The present invention is further configured such that a support is installed on the lower surface of the protective shell, a drive motor is installed on the side wall of the support, the output end of the drive motor is connected to a drive shaft, and the drive shaft is fixedly connected to the drive gear.

[0014] This utility model has the following beneficial effects: 1. This utility model, by setting a sealing head assembly, rotatably connects a forward sealing cover and a reverse sealing cover at both ends of the rotating cylinder. This seals the inlets at both ends of the rotating cylinder, reduces heat loss inside the rotating cylinder, reduces energy waste, and also prevents the forward and reverse sealing covers from rotating with the rotating cylinder. This fixes the positions of the feed hopper and hot air inlet pipe connected to the forward sealing cover, and simultaneously fixes the positions of the exhaust pipe and discharge pipe connected to the reverse sealing cover. This facilitates the entry and exit of wet materials and hot air, simplifies the feeding and discharging process of wet materials, and reduces the workload of workers.

[0015] 2. This utility model, by setting up a drive assembly, energizes the drive motor and the stirring motor. The drive motor causes the drive shaft to rotate, the drive gear to rotate, and the driven gear to rotate in the opposite direction, causing the rotating drum to rotate with the driven gear. The stirring motor causes the stirring shaft to rotate, which in turn drives the stirring rod and scraper to rotate. The stirring shaft, stirring rod and scraper stir the wet material inside the rotating drum in a forward direction, keeping the wet material inside the rotating drum in an active state, so that the wet material can fully contact the heat, thus accelerating the drying efficiency of the wet material. At the same time, the rotating scraper cleans the wet material adhering to the inner wall of the rotating drum, reducing the amount of wet material remaining on the inner wall of the rotating drum, facilitating the cleaning of the rotating drum later, and also reducing the waste of wet material. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 A three-dimensional schematic diagram of a rotary dryer suitable for drying wet materials. Figure 1 ; Figure 2 A three-dimensional schematic diagram of a rotary dryer suitable for drying wet materials. Figure 2 ; Figure 3 This is a cross-sectional schematic diagram of a rotary dryer suitable for drying wet materials; Figure 4 This is a schematic diagram showing the connection between the rotating cylinder, drive motor, drive shaft, driving gear, and driven gear.

[0018] The attached diagram lists the components represented by each number as follows: 1-Rotating cylinder, 2-End cap assembly, 201-Forward cover, 201a-Forward support foot, 202-Feed hopper, 202a-Threaded plug, 203-Hot air inlet pipe, 204-Reverse cover, 204a-Reverse support foot, 205-Exhaust pipe, 206-Forward limit ring, 206a-Sealing ring, 207-Reverse limit ring, 208-Discharge pipe, 209-Controller, 209a-Terminal socket, 209b-Temperature sensor, 210-Bearing, 3-Drive assembly, 301-Drive motor, 301a-Drive shaft, 302-Protective housing, 302a-Cover plate, 302b-Support, 303-Agitator motor, 303a-Agitator shaft, 303b-Agitator rod, 303c-Scraper, 304-Drive gear, 304a-Driven gear. Detailed Implementation

[0019] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 Please see Figure 1 and Figure 2 This utility model is a rotary dryer suitable for drying wet materials, including a rotating drum 1 and a head assembly 2. The head assembly 2 includes a forward cover 201, a reverse cover 204 and a bearing 210. The cooperation of the forward cover 201 and the reverse cover 204 seals both ends of the rotating drum 1, preventing heat loss inside the rotating drum 1, reducing energy waste, and ensuring the temperature for drying wet materials. The bearing 210 prevents the forward cover 201 and the reverse cover 204 from rotating with the rotating drum 1, thus fixing the positions of the feed hopper 202, hot air inlet pipe 203, exhaust pipe 205 and discharge pipe 208, simplifying the feeding and discharging process of wet materials and reducing workload. Specifically, two bearings 210 are symmetrically interference-fitted at both ends of the rotating cylinder 1. A positive cover 201 rotatably connected to one bearing 210 abuts against one end of the rotating cylinder 1, and a negative cover 204 rotatably connected to the other bearing 210 abuts against the other end of the rotating cylinder 1. Furthermore, the rotating cylinder 1 has a hollow structure and is inclined. A positive limiting ring 206 fixed to the circumference of the rotating cylinder 1 is located near the positive sealing cover 201. The positive limiting ring 206 is used to limit the position of the positive sealing cover 201 on the rotating cylinder 1. A reverse limiting ring 207 fixed to the circumference of the rotating cylinder 1 is located near the reverse sealing cover 204. The reverse limiting ring 207 is used to limit the position of the reverse sealing cover 204 on the rotating cylinder 1. A sealing ring 206a is provided on the side wall of both the positive limiting ring 206 and the reverse limiting ring 207. The sealing ring 206a ensures the sealing effect of the contact surface between the positive sealing cover 201 and the positive limiting ring 206, and at the same time ensures the sealing effect of the contact surface between the reverse sealing cover 204 and the reverse limiting ring 207, preventing rotation. Heat is discharged from the inside of cylinder 1 to reduce energy loss. A threaded plug 202a is threadedly connected to the feed hopper 202 on the outer wall of the forward cover 201. A hot air inlet pipe 203 connected to the outer wall of the forward cover 201 is located below the feed hopper 202. An exhaust pipe 205 is connected to the outer wall of the reverse cover 204. A discharge pipe 208 connected to the outer wall of the reverse cover 204 is located below the exhaust pipe 205. A forward support foot 201a is installed on the lower surface of the forward cover 201. A reverse support foot 204a is installed on the lower surface of the reverse cover 204. A controller 209 is installed on the outer wall of the reverse cover 204. A terminal socket 209a is embedded in the reverse cover 204. A temperature sensor 209b is installed on the inner wall of the reverse cover 204. The operation process of this embodiment is as follows: Connect the inlet end of the hot air inlet pipe 203 to the fan on the external hot air source pipe. Power on the fan to allow hot air to pass through the hot air inlet pipe 203 and enter the interior of the rotating drum 1, heating the interior of the rotating drum 1. Simultaneously, the temperature sensor 209b detects the temperature inside the rotating drum 1. When the detected temperature is lower than the temperature value set by the controller 209, continue to input hot air into the rotating drum 1 to further heat the interior. When the detected temperature is higher than the temperature value set by the controller 209, stop inputting hot air into the rotating drum 1. Then, rotate the threaded plug 202a clockwise to remove it from the feed hopper 202, and then insert the external wet material (petroleum coke). The outlet of the pipe (containing needle coke, pitch coke, or graphite) is connected to the inlet of the feed hopper 202, allowing the wet material to pass through the feed hopper 202 under its own weight and enter the interior of the rotating drum 1. The wet material inside the rotating drum 1 comes into contact with hot air for heat exchange, achieving the drying process. The gas inside the rotating drum 1 is discharged upward through the exhaust pipe 205. After the wet material inside the rotating drum 1 is dried, the valve on the discharge pipe 208 is opened, allowing the dried wet material to pass through the discharge pipe 208 and be discharged to the outside of the rotating drum 1. After the discharge is completed, wet material continues to be introduced into the rotating drum 1. A forward sealing cover 201 and a reverse sealing cover 204 are rotatably connected to the rotating drum 1 to seal both ends of the rotating drum 1 and prevent the heat inside the rotating drum 1 from escaping.

[0021] Example 2 Please see Figure 1 , Figure 3 and Figure 4 Based on the first specific embodiment, a drive assembly 3 is provided. The drive assembly 3 includes a drive motor 301, a drive shaft 301a, a stirring motor 303, a stirring shaft 303a, a stirring rod 303b, a scraper 303c, a drive gear 304, and a driven gear 304a. Through the cooperation of the drive motor 301, the drive shaft 301a, the drive gear 304, and the driven gear 304a, the rotating drum 1 is rotated in the opposite direction, so that the wet material inside the rotating drum 1 is in a non-static state, and the wet material is fully in contact with heat. Through the cooperation of the stirring motor 303, the stirring shaft 303a, the stirring rod 303b, and the scraper 303c, the wet material inside the rotating drum 1 is stirred in the forward direction, so that the movement of the wet material inside the rotating drum 1 is more active, which is conducive to accelerating the drying efficiency of the wet material. At the same time, the scraper 303c cleans the wet material adhering to the inner wall of the rotating drum 1, reducing the residue of the wet material. Specifically, the driven gear 304a is sleeved on the outer periphery of the rotating cylinder 1, and the driving gear 304 is meshed below the driven gear 304a. The stirring motor 303 is installed on the outer wall of the positive cover 201. The output end of the stirring motor 303 is connected to the stirring shaft 303a. The stirring shaft 303a extends through the positive cover 201 into the interior of the rotating cylinder 1. The stirring rod 303b is connected to the periphery of the stirring shaft 303a. The scraper 303c connected to the end of the stirring rod 303b abuts against the inner wall of the rotating cylinder 1. Furthermore, a protective shell 302 is fitted onto the rotating cylinder 1. The driving gear 304 and the driven gear 304a are both located inside the protective shell 302. Cover plates 302a are installed on both sides of the protective shell 302. The cooperation between the protective shell 302 and the cover plates 302a protects the driving gear 304 and the driven gear 304a from dust accumulation, thereby ensuring smooth linkage between the driving gear 304 and the driven gear 304a and preventing the rotating cylinder 1 from jamming during rotation. The cover plates 302a are fitted onto the rotating cylinder 1. A support 302b is installed on the lower surface of the protective shell 302. A drive motor 301 is installed on the side wall of the support 302b. The output end of the drive motor 301 is connected to a drive shaft 301a. The drive shaft 301a is fixedly connected to the driving gear 304. The cooperation between the drive motor 301 and the drive shaft 301a is used to drive the driving gear 304 to rotate, thereby realizing the rotation of the rotating cylinder 1. The operation process of this embodiment is as follows: The drive motor 301 is energized, causing the drive shaft 301a to rotate, which in turn drives the drive gear 304 to rotate. The driven gear 304a rotates in the opposite direction to the drive gear 304, and the rotating drum 1 rotates in the same direction as the driven gear 304a. This keeps the wet material (petroleum coke, needle coke, pitch coke, or graphite) inside the rotating drum 1 in a non-static state, allowing the wet material to fully contact the heat inside the rotating drum 1, thus achieving the drying process. The stirring motor 303 is energized, causing the stirring shaft 303a to rotate, stirring the wet material inside the rotating drum 1. The stirring shaft 303a drives the stirring rod 303b to rotate. Similarly, the stirring rod 303b drives the scraper 303c to rotate, stirring the wet material inside the rotating drum 1. This makes the wet material inside the rotating drum 1 move more actively, allowing heat to come into more thorough contact with the wet material, and the wet material to dry more completely. At the same time, the rotating scraper 303c cleans the wet material adhering to the inner wall of the rotating drum 1, reducing the amount of wet material remaining on the inner wall of the rotating drum 1. Since both the forward cover 201 and the reverse cover 204 are rotatably connected to the rotating drum 1 through the bearing 210, the forward cover 201 and the reverse cover 204 do not rotate with the rotating drum 1 during the rotation of the rotating drum 1.

[0022] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A rotary dryer suitable for drying wet materials, comprising a rotating drum (1), wherein the rotating drum (1) has a hollow structure and is inclined, characterized in that: The rotating cylinder (1) is provided with a head assembly (2), which includes bearings (210) symmetrically interference-connected at both ends of the rotating cylinder (1). A positive cover (201) rotatably connected to one of the bearings (210) abuts against one end of the rotating cylinder (1), and a negative cover (204) rotatably connected to the other bearing (210) abuts against the other end of the rotating cylinder (1). A drive assembly (3) is provided on the rotating cylinder (1). The drive assembly (3) includes a driven gear (304a) sleeved on the outer periphery of the rotating cylinder (1). A drive gear (304) is meshed below the driven gear (304a). A stirring motor (303) is installed on the outer wall of the positive cover (201). A stirring shaft (303a) is connected to the output end of the stirring motor (303). The stirring shaft (303a) extends through the positive cover (201) into the interior of the rotating cylinder (1). A stirring rod (303b) is connected to the periphery of the stirring shaft (303a). A scraper (303c) connected to the end of the stirring rod (303b) abuts against the inner wall of the rotating cylinder (1).

2. A rotary dryer suitable for drying wet materials according to claim 1, characterized in that: The forward limiting ring (206) fixed to the circumference of the rotating cylinder (1) is located on the side closer to the forward cover (201), and the reverse limiting ring (207) fixed to the circumference of the rotating cylinder (1) is located on the side closer to the reverse cover (204). Both the forward limiting ring (206) and the reverse limiting ring (207) are provided with sealing rings (206a).

3. A rotary dryer suitable for drying wet materials according to claim 2, characterized in that: A threaded plug (202a) is threadedly connected to the feed hopper (202) connected to the outer wall of the forward cover (201). A hot air inlet pipe (203) connected to the outer wall of the forward cover (201) is located below the feed hopper (202). An exhaust pipe (205) is connected to the outer wall of the reverse cover (204). A discharge pipe (208) connected to the outer wall of the reverse cover (204) is located below the exhaust pipe (205).

4. A rotary dryer suitable for drying wet materials according to claim 2, characterized in that: The lower surface of the forward cover (201) is provided with a forward support foot (201a), and the lower surface of the reverse cover (204) is provided with a reverse support foot (204a).

5. A rotary dryer suitable for drying wet materials according to claim 1, characterized in that: A controller (209) is installed on the outer wall of the reverse cover (204), a terminal socket (209a) is embedded in the reverse cover (204), and a temperature sensor (209b) is installed on the inner wall of the reverse cover (204).

6. A rotary dryer suitable for drying wet materials according to claim 1, characterized in that: A protective shell (302) is fitted on the rotating cylinder (1). The driving gear (304) and the driven gear (304a) are both located inside the protective shell (302). Cover plates (302a) are installed on both sides of the protective shell (302), and the cover plates (302a) are fitted on the rotating cylinder (1).

7. A rotary dryer suitable for drying wet materials according to claim 6, characterized in that: A support (302b) is installed on the lower surface of the protective shell (302), and a drive motor (301) is installed on the side wall of the support (302b). The output end of the drive motor (301) is connected to a drive shaft (301a), and the drive shaft (301a) is fixedly connected to the drive gear (304).

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