A pit furnace rotary furnace

Abstract

The utility model belongs to the technical field of thermal equipment, specifically disclose a kind of kiln rotary furnace.The utility model includes rotary kiln cylinder and located kiln tail and kiln head of rotary kiln cylinder both ends, and the outer wall of kiln tail is equipped with rotating assembly, rotating assembly includes drive unit and cleaning unit, and the motor in rotating assembly is synchronously realized rotary kiln cylinder forward rotation and scraper reverse rotation, without additional driving equipment, both greatly simplify equipment overall structure, reduce manufacturing cost and later maintenance difficulty, reduce power consumption again, meet the production demand of efficient energy saving, and through the copy board can also rotate with cylinder and realize material even flip, avoid local temperature agglomeration, guarantee product quality stability, simultaneously through the design that scraper sticks to inner wall and both sides are inclined, can prevent skin accumulation to hinder material flow, reduce cleaning frequency to extend equipment continuous operation time to extend equipment overall service life.

Description

Technical Field

[0001] This application relates to the field of thermal equipment technology, and more specifically, to a rotary kiln. Background Technology

[0002] A rotary kiln (also known as a swivel kiln) is a thermal equipment with an inclined rotating cylinder as its core. A drive device drives the cylinder to rotate slowly around its axis, allowing the material inside to be evenly turned over and heated during rotation, and gradually moved along the inclined direction of the cylinder to complete processes such as drying, roasting, calcination, or reaction. It mainly consists of a rotating cylinder, a support roller group, a transmission system, a kiln head combustion device, a kiln tail feeding / sealing device, and a waste heat recovery system. It is widely used in building materials (such as lime and cement), metallurgy (such as ore roasting), chemical industry (such as catalyst preparation), and hazardous waste treatment, and is especially suitable for production scenarios that require continuous, large-scale processing of granular or lumpy materials.

[0003] During long-term operation, existing rotary kilns are prone to material buildup due to factors such as high temperature, compositional fluctuations, and uneven local temperatures. These buildup forms kiln crusts that gradually adhere to the kiln wall. As production continues, these crusts harden and thicken. When the buildup reaches a certain level, it directly encroaches on the effective space inside the kiln, obstructing the material's movement path and disrupting the smooth flow along the inclined direction of the cylinder. This results in material jamming and stagnation. If the kiln crusts are not effectively addressed in time, they will continue to expand and may form a ring-shaped "cluster" inside the kiln, eventually completely blocking the material conveying channel, forcing the production line to shut down for cleaning, and shortening the equipment's lifespan. Utility Model Content

[0004] To address the aforementioned problems, this application provides a rotary kiln.

[0005] The rotary kiln provided in this application adopts the following technical solution:

[0006] A rotary kiln includes a rotary kiln body and a kiln tail and a kiln head located at both ends of the rotary kiln body. The outer wall of the kiln tail is provided with a rotating assembly, which includes a drive unit and a cleaning unit.

[0007] The drive unit includes a motor and a first gear ring. The motor drives the first gear ring to rotate, thereby driving the rotary kiln cylinder to rotate.

[0008] The cleaning unit includes a second toothed ring and a scraper. A motor is used to drive the second toothed ring and the scraper to reverse, thereby cleaning the inner wall of the rotary kiln.

[0009] Furthermore, a connecting ring is rotatably connected to one side of the kiln head, and one side of the connecting ring is rotatably connected to one end of the rotary kiln body. The end of the rotary kiln body away from the connecting ring is rotatably connected to one side of the kiln tail. Multiple lifting plates are provided inside the side of the rotary kiln body near the kiln tail.

[0010] Furthermore, a first fixed seat is provided on one side of the bottom of the rotary kiln body, the motor is fixedly installed on one side of the first fixed seat, a first gear is fixedly connected to the outer wall of the output end of the motor, and a first gear ring is fixedly installed on the outer wall of the rotary kiln body, with the first gear meshing with the first gear ring.

[0011] Furthermore, a rotating shaft is rotatably connected to the top of the first fixed base, and a second gear and a third gear are fixedly connected to the outer wall of the rotating shaft. The second gear meshes with the first gear, and a second gear ring is fixedly installed on the outer wall of the connecting ring. The third gear meshes with the second gear ring.

[0012] Furthermore, the number of scrapers is set to two, with the two scrapers located on both sides of the inner wall of the rotary kiln body. The two scrapers are in contact with both sides of the inner wall of the rotary kiln body, and both sides of each scraper are inclined.

[0013] Furthermore, each scraper is provided with multiple bolts on one side, and each scraper is fixedly connected to the inner wall of the connecting ring by corresponding bolts.

[0014] Through the above technical solution, the motor in the rotating component synchronously realizes the forward rotation of the rotary kiln cylinder and the reverse rotation of the scraper, without the need for additional drive equipment. This greatly simplifies the overall structure of the equipment, reduces manufacturing costs and later maintenance difficulties, and also reduces power consumption.

[0015] Furthermore, the outer wall of the rotary kiln body is provided with two tires, and the bottom of the rotary kiln body is provided with two second fixed seats. Each second fixed seat is provided with two support rollers on its top, and each pair of support rollers is located on both sides of the bottom of the corresponding tire.

[0016] Furthermore, a fixing box is fixedly installed on one side of each idler roller, and a guide plate is fixedly connected to one side of each fixing box. The top of the guide plate is in contact with the outer wall of the corresponding idler roller, and the outer wall of the guide plate is set to a smooth surface. A collection box is placed inside each fixing box, and a handle is fixedly connected to one side of each collection box.

[0017] Through the above technical solution, the guide plate can clean the impurities adhering to the surface of the idler roller in real time, avoid the accumulation of impurities affecting the contact accuracy between the tire and the idler roller, and prevent vibration or displacement of the rotary kiln cylinder during operation.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] (1) This utility model realizes the forward rotation of the rotary kiln cylinder and the reverse rotation of the scraper by the synchronous motor in the rotating component. No additional drive equipment is required, which greatly simplifies the overall structure of the equipment, reduces manufacturing costs and post-maintenance difficulty, and reduces power consumption, which meets the production requirements of high efficiency and energy saving. In addition, the scraper can also rotate with the cylinder to realize the uniform turning of materials, avoid local heat accumulation and agglomeration, and ensure stable product quality. At the same time, the scraper is designed to fit the inner wall and be inclined on both sides, which can fully cover the cleaning area, reduce material resistance, efficiently scrape off the crust, prevent the crust from accumulating and hindering the flow of materials, reduce the frequency of downtime for cleaning, and extend the continuous running time of the equipment, thereby extending the overall service life of the equipment.

[0020] (2) By setting the guide plate, the present invention can clean the impurities adhering to the surface of the idler roller in real time, avoid the accumulation of impurities affecting the contact accuracy between the tire and the idler roller, prevent vibration or displacement of the rotary kiln cylinder during operation, and the scraped impurities can fall into the collection box in the fixed box along the inclined angle of the guide plate. With the handle, they can be easily pulled out for cleaning without disassembling the idler roller or the fixed box, which greatly reduces the maintenance difficulty and downtime, and can also prevent impurities from scattering and contaminating the equipment, further extending the service life of the idler roller, tire and other components, and ensuring the overall operational stability of the rotary kiln. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a top view of the overall structure of this utility model;

[0023] Figure 3 This is a side view of the overall structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the rotary kiln cylinder of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall structure of the second toothed ring and scraper of this utility model;

[0026] Figure 6 For the present utility model Figure 3 Enlarged view of the structure at point A;

[0027] Figure 7 For the present utility model Figure 3 Enlarged view of the structure at point B.

[0028] Explanation of reference numerals in the attached drawings: 1. Rotary kiln body; 2. Kiln tail; 3. Kiln head; 4. Connecting ring; 5. First fixed seat; 6. Motor; 7. First gear; 8. First gear ring; 9. Shaft; 10. Second gear; 11. Third gear; 12. Second gear ring; 13. Scraper; 14. Bolt; 15. Tire; 16. Second fixed seat; 17. Idler roller; 18. Fixed box; 19. Guide plate; 20. Collection box; 21. Handle; 22. Lifting plate. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] Reference Figures 1-7 A rotary kiln includes a rotary kiln body 1 and a kiln tail 2 and a kiln head 3 located at both ends of the rotary kiln body 1. The outer wall of the kiln tail 2 is provided with a rotating assembly, which includes a drive unit and a cleaning unit.

[0031] The drive unit includes a motor 6 and a first gear ring 8. The motor 6 is used to drive the first gear ring 8 to rotate, thereby driving the rotary kiln cylinder 1 to rotate.

[0032] The cleaning unit includes a second toothed ring 12 and a scraper 13. The motor 6 is used to drive the second toothed ring 12 and the scraper 13 to reverse, thereby cleaning the inner wall of the rotary kiln cylinder 1.

[0033] The kiln tail 2 has a feed inlet on one side, and the kiln head 3 has a discharge outlet on one side. The kiln tail 2 is fixedly installed on the feed-related support structure such as the kiln tail 2 smoke chamber or the feed pipe, while the kiln head 3 is fixedly installed on the fixed frame connected to the combustion device or the cooling discharge equipment. (The installation method of the kiln tail 2 and the kiln head 3 is existing technology and is not shown in the figure.)

[0034] Reference Figures 1-7A connecting ring 4 is rotatably connected to one side of the kiln head 3. One side of the connecting ring 4 is rotatably connected to one end of the rotary kiln body 1. The end of the rotary kiln body 1 away from the connecting ring 4 is rotatably connected to one side of the kiln tail 2. Multiple lifting plates 22 are provided inside the rotary kiln body 1 on the side near the kiln tail 2. A first fixed seat 5 is provided on one side of the bottom of the rotary kiln body 1. A motor 6 is fixedly installed on one side of the first fixed seat 5. A first gear 7 is fixedly connected to the outer wall of the output end of the motor 6. A first gear ring 8 is fixedly installed on the outer wall of the rotary kiln body 1. The first gear 7 and the first gear ring 8 are connected to the kiln tail 2. The gear ring 8 meshes with each other. The top of the first fixed seat 5 is rotatably connected to the rotating shaft 9. The outer wall of the rotating shaft 9 is fixedly connected to the second gear 10 and the third gear 11. The second gear 10 meshes with the first gear 7. The second gear ring 12 is fixedly installed on the outer wall of the connecting ring 4. The third gear 11 meshes with the second gear ring 12. The number of scrapers 13 is set to two. The two scrapers 13 are located on both sides of the inner wall of the rotary kiln body 1. The two scrapers 13 are respectively attached to both sides of the inner wall of the rotary kiln body 1. Both sides of each scraper 13 are inclined.

[0035] The rotating assembly can clean the inner wall of the rotary kiln cylinder 1 while driving it to rotate. Specifically, the material first enters the rotary kiln cylinder 1 through the feed inlet on one side of the kiln tail 2. Then, the motor 6, fixed to the first fixed seat 5, is started. The first fixed seat 5 provides stable support for the motor 6, preventing vibration and displacement from affecting transmission accuracy. Next, the output end of the motor 6 drives the first gear 7 fixed to the outer wall to rotate. The first gear 7 is rigidly connected to the output end of the motor 6, resulting in high transmission efficiency and low power loss, quickly transmitting the torque of the motor 6 to subsequent components. Since the first gear 7 meshes with the first gear ring 8 fixed to the outer wall of the rotary kiln cylinder 1, and the first gear ring 8 is circumferentially distributed and conforms to the outer wall of the cylinder, it is subjected to… The force is uniform and firmly connected to the cylinder, which can drive the cylinder to rotate smoothly along the axis. This can avoid the cylinder deformation caused by excessive local force. At the same time, since the end of the cylinder away from the kiln head 3 is rotatably connected to the kiln tail 2, and the end closer to the kiln head 3 is rotatably connected to the kiln head 3 through the connecting ring 4, and the connection points of the rotary kiln cylinder 1, kiln tail 2, kiln head 3 and connecting ring 4 are equipped with sealing elements, the sealing of the cylinder connection can be guaranteed, reducing the leakage of high temperature gas in the kiln and the infiltration of cold air from the outside. Among them, the multiple lifting plates 22 inside the cylinder near the kiln tail 2 rotate synchronously with the cylinder. The lifting plates 22 can lift the material upward and sprinkle it evenly, realizing the full turning of the material. This not only increases the contact area between the material and the heat source in the kiln to improve the heating efficiency, but also avoids the material from local heat accumulation and agglomeration.

[0036] Simultaneously, when motor 6 drives the first gear 7 to rotate, it also meshes with the second gear 10 on the outer wall of the rotating shaft 9, which is connected to the top of the first fixed base 5. The rotating shaft 9 is connected to the first fixed base 5 through a high-precision bearing, resulting in low rotational resistance and smooth transmission, ensuring stable power transmission. The rotating shaft 9 also synchronously drives the third gear 11, which is fixed on the outer wall, to rotate. The third gear 11 and the second gear 10 are coaxially arranged, and their gear modules are matched, preventing jamming or skipping during transmission. Since the third gear 11 meshes with the second gear ring 12 fixed on the outer wall of the connecting ring 4, and the second gear ring 12 is fixed on the connecting ring 4, its position is stable and... The rotating mechanism moves synchronously with the connecting ring 4 and maintains continuous and precise meshing with the third gear 11, ensuring that the reverse power is stably transmitted to the connecting ring 4. This, in turn, drives the two scrapers 13 linked to the connecting ring 4 to rotate in the opposite direction (opposite to the rotation direction of the cylinder). The two scrapers 13 are respectively attached to both sides of the inner wall of the cylinder, which can fully cover the inner wall cleaning area and avoid missed cleaning. Moreover, the two sides of each scraper 13 are inclined, which can reduce the resistance of the material to the scraper 13 and increase the contact area between the scraper 13 and the inner wall, thereby improving the efficiency of skin removal. At the same time, the attached design can remove the skin of the material adhering to the inner wall and prevent the skin from accumulating and affecting the material flow.

[0037] Ultimately, the rotary kiln cylinder 1 achieves the dual functions of forward rotation (driving the material to move and complete the heat treatment) and reverse rotation of scraper 13 (synchronously cleaning the inner wall) through motor 6. No additional drive equipment is required, which simplifies the overall structure of the equipment, reduces manufacturing costs and maintenance difficulty, and reduces energy consumption, meeting the requirements of high-efficiency and energy-saving production.

[0038] The rotary kiln cylinder 1 rotates forward (driving the material and completing the heat treatment) and the scraper 13 rotates in the opposite direction (simultaneously cleaning the inner wall crust) through the motor 6 in the rotating assembly. No additional drive equipment is required, which greatly simplifies the overall structure of the equipment, reduces manufacturing costs and later maintenance difficulty, and reduces power consumption, meeting the requirements of high-efficiency and energy-saving production. In addition, the lifting plate 22 can also rotate with the cylinder to achieve uniform material turning, avoid local heat accumulation and agglomeration, and ensure stable product quality. At the same time, the scraper 13 is designed to fit the inner wall and be inclined on both sides, which can fully cover the cleaning area, reduce material resistance, efficiently scrape off the crust, prevent the crust from accumulating and hindering the material flow, reduce the frequency of downtime for cleaning, and extend the continuous operation time of the equipment, thereby extending the overall service life of the equipment.

[0039] Reference Figures 1-7 Each scraper 13 has multiple bolts 14 on one side, and each scraper 13 is fixedly connected to the inner wall of the connecting ring 4 by the corresponding bolts 14.

[0040] The connection method of bolt 14 can achieve a stable fixation between scraper 13 and connecting ring 4, ensuring that scraper 13 does not loosen when rotating synchronously in the opposite direction with connecting ring 4, ensuring stable cleaning effect of inner wall, and facilitating disassembly and maintenance of scraper 13. When scraper 13 is worn or malfunctions due to long-term use, it can be quickly replaced by removing bolt 14 without disassembling the connecting ring 4 as a whole, reducing maintenance costs and downtime.

[0041] Reference Figures 1-7 The outer wall of the rotary kiln body 1 is provided with two tires 15, and the bottom of the rotary kiln body 1 is provided with two second fixed seats 16. Each second fixed seat 16 is provided with two rollers 17 on its top. Each pair of rollers 17 is located on the bottom sides of the corresponding tires 15. A fixed box 18 is fixedly installed on one side of each roller 17. A guide plate 19 is fixedly connected to one side of each fixed box 18. The top of the guide plate 19 is in contact with the outer wall of the corresponding roller 17. The outer wall of the guide plate 19 is set as a smooth surface. A collection box 20 is placed inside each fixed box 18. A handle 21 is fixedly connected to one side of each collection box 20.

[0042] By setting the guide plate 19, impurities adhering to the surface of the idler roller 17 can be cleaned. Specifically, the cleaning method is as follows: First, the two tires 15 on the outer wall of the rotary kiln cylinder 1 rotate synchronously with the cylinder. The tires 15 are fixed to the outer wall of the cylinder, ensuring even force distribution and stable support, thus evenly transferring the weight of the cylinder to the lower idler roller 17 and preventing localized deformation of the cylinder. Next, the tires 15 contact the idler rollers 17 on top of the two second fixed seats 16 at the bottom. The second fixed seats 16 provide stable support for the idler rollers 17, ensuring that the idler rollers 17 do not shift when bearing the weight of the cylinder. Furthermore, the arrangement of two idler rollers 17 on each second fixed seat 16, with the idler rollers 17 distributed on both sides of the bottom of the tires 15, allows for more balanced force distribution on the tires 15, further improving the stability of the cylinder operation. Simultaneously, on the idler roller 1... Driven by the friction of the belt 15, the roller 17 rotates. If impurities are generated on the surface of the roller 17 due to material spillage or dust adhesion, they will come into contact with the guide plate 19 on the fixed box 18 on one side as the roller 17 rotates. The top of the guide plate 19 is in contact with the outer wall of the roller 17. When the roller 17 rotates, the surface impurities are blocked and scraped off by the guide plate 19, and will slide down naturally along the inclined angle of the guide plate 19, eventually falling into the collection box 20 inside the fixed box 18. The collection box 20 can directly receive the sliding impurities, realize the centralized collection of impurities, and prevent impurities from scattering and contaminating the equipment or affecting the operation of other components. In addition, the handle 21 fixed on one side of the collection box 20 makes it easy for operators to regularly pull out the collection box 20 to clean impurities without disassembling the roller 17 or the fixed box 18, reducing the difficulty of maintenance and downtime.

[0043] By setting the guide plate 19, impurities adhering to the surface of the idler roller 17 can be cleaned in real time, avoiding the accumulation of impurities that affect the contact accuracy between the tire 15 and the idler roller 17, preventing vibration or displacement of the rotary kiln cylinder 1 during operation. The scraped impurities can fall into the collection box 20 in the fixed box 18 along the inclined angle of the guide plate 19. With the help of the handle 21, they can be easily pulled out for cleaning without disassembling the idler roller 17 or the fixed box 18, which greatly reduces the maintenance difficulty and downtime. It can also prevent impurities from scattering and contaminating the equipment, further extending the service life of components such as the idler roller 17 and tire 15, and ensuring the overall operational stability of the rotary kiln.

[0044] Working principle: First, the material enters the rotary kiln cylinder 1 through the feed inlet on one side of the kiln tail 2. Then, the motor 6, fixed on the first fixed seat 5, is started. The first fixed seat 5 provides stable support for the motor 6, preventing vibration and displacement from affecting the transmission accuracy. Next, the output end of the motor 6 drives the first gear 7 fixed on the outer wall to rotate. The first gear 7 is rigidly connected to the output end of the motor 6, resulting in high transmission efficiency and low power loss. It can quickly transmit the torque of the motor 6 to subsequent components. Since the first gear 7 meshes with the first gear ring 8 fixed on the outer wall of the rotary kiln cylinder 1, and the first gear ring 8 is circumferentially distributed and conforms to the outer wall of the cylinder, the force is evenly distributed and it is firmly connected to the cylinder, which can drive the cylinder along the axis. Smooth rotation avoids excessive local stress that could cause cylinder deformation. The end of the cylinder furthest from the kiln head 3 is rotatably connected to the kiln tail 2, while the end closest to the kiln head 3 is rotatably connected to the kiln head 3 via a connecting ring 4. Sealing elements are installed at the connections between the rotary kiln cylinder 1, kiln tail 2, kiln head 3, and connecting ring 4, ensuring the cylinder's airtightness and reducing leakage of high-temperature gas and infiltration of cold air from the outside. Multiple lifting plates 22 inside the cylinder near the kiln tail 2 rotate synchronously with the cylinder. These plates lift the material upwards and distribute it evenly, ensuring thorough material agitation. This increases the contact area between the material and the kiln's heat source, improving heating efficiency, and prevents localized heat accumulation that could lead to agglomeration.

[0045] Simultaneously, when motor 6 drives the first gear 7 to rotate, it also meshes with the second gear 10 on the outer wall of the rotating shaft 9, which is connected to the top of the first fixed base 5. The rotating shaft 9 is connected to the first fixed base 5 through a high-precision bearing, resulting in low rotational resistance and smooth transmission, ensuring stable power transmission. The rotating shaft 9 also synchronously drives the third gear 11, which is fixed on the outer wall, to rotate. The third gear 11 and the second gear 10 are coaxially arranged, and their gear modules are matched, preventing jamming or skipping during transmission. Since the third gear 11 meshes with the second gear ring 12 fixed on the outer wall of the connecting ring 4, and the second gear ring 12 is fixed on the connecting ring 4, its position is stable and... The rotating mechanism moves synchronously with the connecting ring 4 and maintains continuous and precise meshing with the third gear 11, ensuring that the reverse power is stably transmitted to the connecting ring 4. This, in turn, drives the two scrapers 13 linked to the connecting ring 4 to rotate in the opposite direction (opposite to the rotation direction of the cylinder). The two scrapers 13 are respectively attached to both sides of the inner wall of the cylinder, which can fully cover the inner wall cleaning area and avoid missed cleaning. Moreover, the two sides of each scraper 13 are inclined, which can reduce the resistance of the material to the scraper 13 and increase the contact area between the scraper 13 and the inner wall, thereby improving the efficiency of skin removal. At the same time, the attached design can remove the skin of the material adhering to the inner wall and prevent the skin from accumulating and affecting the material flow.

[0046] Ultimately, the rotary kiln cylinder 1 achieves the dual functions of forward rotation (driving the material to move and complete the heat treatment) and reverse rotation of scraper 13 (synchronously cleaning the inner wall) through motor 6. No additional drive equipment is required, which simplifies the overall structure of the equipment, reduces manufacturing costs and maintenance difficulty, and reduces energy consumption, meeting the requirements of high-efficiency and energy-saving production.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary kiln, comprising a rotary kiln body (1) and a kiln tail (2) and a kiln head (3) located at both ends of the rotary kiln body (1), characterized in that, The outer wall of the kiln tail (2) is provided with a rotating assembly, which includes a driving unit and a cleaning unit; The drive unit includes a motor (6) and a first gear ring (8). The motor (6) is used to drive the first gear ring (8) to rotate, thereby driving the rotary kiln cylinder (1) to rotate. The cleaning unit includes a second toothed ring (12) and a scraper (13). The motor (6) is used to drive the second toothed ring (12) and the scraper (13) to reverse, thereby cleaning the inner wall of the rotary kiln body (1).

2. The rotary kiln according to claim 1, characterized in that: A connecting ring (4) is rotatably connected to one side of the kiln head (3). One side of the connecting ring (4) is rotatably connected to one end of the rotary kiln body (1). The end of the rotary kiln body (1) away from the connecting ring (4) is rotatably connected to one side of the kiln tail (2). Multiple lifting plates (22) are provided inside the side of the rotary kiln body (1) near the kiln tail (2).

3. A rotary kiln according to claim 2, characterized in that: The rotary kiln body (1) has a first fixed seat (5) on one side of its bottom. The motor (6) is fixedly installed on one side of the first fixed seat (5). The output end of the motor (6) is fixedly connected to the outer wall of the first gear (7). The first gear ring (8) is fixedly installed on the outer wall of the rotary kiln body (1). The first gear (7) meshes with the first gear ring (8).

4. A rotary kiln according to claim 3, characterized in that: The top of the first fixed seat (5) is rotatably connected to a rotating shaft (9). The outer wall of the rotating shaft (9) is fixedly connected to a second gear (10) and a third gear (11). The second gear (10) meshes with the first gear (7). The second gear ring (12) is fixedly installed on the outer wall of the connecting ring (4). The third gear (11) meshes with the second gear ring (12).

5. A rotary kiln according to claim 4, characterized in that: The number of scrapers (13) is set to two. The two scrapers (13) are located on both sides of the inner wall of the rotary kiln body (1). The two scrapers (13) are respectively attached to both sides of the inner wall of the rotary kiln body (1). Both sides of each scraper (13) are inclined.

6. A rotary kiln according to claim 5, characterized in that: Each scraper (13) has multiple bolts (14) on one side, and each scraper (13) is fixedly connected to the inner wall of the connecting ring (4) by the corresponding bolts (14).

7. A rotary kiln according to claim 1, characterized in that: The outer wall of the rotary kiln body (1) is provided with two tires (15), and the bottom of the rotary kiln body (1) is provided with two second fixed seats (16). Each second fixed seat (16) is provided with two rollers (17) on its top. Each pair of rollers (17) is located on the bottom sides of the corresponding tire (15).

8. A rotary kiln according to claim 7, characterized in that: Each of the idler rollers (17) has a fixed box (18) fixedly installed on one side, and a guide plate (19) fixedly connected to one side of each fixed box (18). The top of the guide plate (19) is in contact with the outer wall of the corresponding idler roller (17). The outer wall of the guide plate (19) is set as a smooth surface. Each fixed box (18) has a collection box (20) placed inside, and a handle (21) fixedly connected to one side of each collection box (20).

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