Adjustable air volume rotary kiln preheater

Abstract

The utility model discloses a rotary kiln preheater of adjustable air quantity, include: feed hopper, the right side of feed hopper is connected with secondary return air pipe, the inside of secondary return air pipe and tertiary return air pipe all is installed with valve bushing, the inside rotation of valve bushing is installed with vane, the outer edge of vane is connected with the pivot, the surface fixed mounting of pivot has the swing bar, the one end fixed mounting of pivot away from vane has motor, the surface rotation of swing bar is connected with linkage link, the rotation of vane, the passage space of valve bushing inside gradually opens, makes the wind to be able to pass through return air pipe and enter feed hopper and feeding chamber in smoothly and carry out preheating, through the turning angle of adjusting vane, can accurate control return air pipe inside passage diameter, and then adjust air quantity, and this kind of adjustment effectively avoid hot air to enter too fast, thereby prevent material preheating uneven, reduce the effect of preheating, ensure that material can obtain even and effective preheating treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kiln preheaters, specifically an adjustable air volume rotary kiln preheater. Background Technology

[0002] During the calcination process in a rotary kiln, the fuel used can be solid, liquid, or gaseous. To achieve the optimal cost, multiple fuels are often blended together. When using more than one fuel, sudden changes in one fuel or untimely or excessive / insufficient adjustment of another fuel can affect the rotary kiln's operating conditions, leading to unstable material quality, impacting product quality, and affecting production costs. To improve calcination stability and efficiency, a preheater is used to pre-dry the material during calcination, preventing it from becoming damp and difficult to discharge. Simultaneously, the preheater is connected to a return air duct to collect waste heat, improving energy efficiency.

[0003] In current industrial production, the design of rotary kiln preheaters typically involves interconnection with secondary and tertiary air ducts. The main purpose of this design is to effectively utilize waste heat to dry and preheat materials in the feeding chamber through the return air system. However, in actual operation, this method of collecting waste heat and returning air presents several problems. First, due to the collection of waste heat, adjusting the airflow in the return air duct becomes difficult. This inconvenience leads to an increased return air velocity, causing materials in the feeding chamber to be easily blown away by the high-speed airflow, resulting in backflow and re-entering the feeding system. Second, because the airflow is not easily controlled precisely within the space, the preheating process becomes too fast, leading to uneven preheating of the materials. Specifically, the outer part of the material is preheated too quickly due to earlier contact with hot air, thus increasing the temperature difference between the inside and outside of the material. This increased internal and external temperature difference ultimately reduces the overall preheating effect and affects the processing quality of the materials.

[0004] Therefore, those skilled in the art have provided an adjustable airflow rotary kiln preheater to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable airflow rotary kiln preheater to solve the problem of poor preheating effect of existing rotary kiln preheaters mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable airflow rotary kiln preheater includes: a feed hopper, a secondary return air pipe connected to the right side of the feed hopper, a tertiary return air pipe connected to the left side of the feed hopper, valve sleeves installed inside both the secondary and tertiary return air pipes, blades rotatably mounted inside the valve sleeves, a rotating shaft connected to the outer edge of the blades, a rocker arm fixedly mounted on the surface of the rotating shaft, a motor fixedly mounted at the end of the rotating shaft away from the blades, and a linkage rod rotatably connected to the surface of the rocker arm.

[0008] As a further improvement of this utility model: the swing arm and the rotating shaft are fixedly connected, and a connecting shaft is provided between the swing arm and the linkage rod.

[0009] As a further improvement of this utility model: the connecting shaft and the linkage rod are fixedly connected, and the linkage rod is rotatably connected to the swing rod through the connecting shaft.

[0010] As a further embodiment of this utility model: the rotating shaft and the blade are fixedly connected, and the blade, rotating shaft and rocker arm are all arranged in a ring about the symmetrical center line of the valve sleeve.

[0011] As a further embodiment of this utility model: a mounting base is fixedly installed on the outer wall of the valve sleeve, the rotating shaft passes through the surface of the mounting base, and the rotating shaft and the fixed base form a rotating structure, a fixed base is fixedly installed at the center of the valve sleeve, and a reinforcing rod is fixedly installed on the surface of the fixed base.

[0012] As a further embodiment of this utility model: a feeding pipe is connected to the lower part of the feeding hopper, and a feeding chamber is installed at the lower end of the feeding pipe. The feeding hopper and the feeding chamber are interconnected through the feeding pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] Valve sleeves are installed inside both the secondary and tertiary return air ducts. These valve sleeves are designed to control the return air volume in the ducts. The rotating part inside each valve sleeve contains several sets of blades. These fan-shaped blades combine to form a perfect circular structure, effectively sealing the internal passage of the valve sleeve. Each set of blades is tightly connected to a rotating shaft, on which a rocker arm is mounted. The surface of the rocker arm is rotatably connected to a linkage rod, ensuring that the structure of each set of blades and the connection structure between the blades are consistent. Through the linkage rod, the blades are interconnected, forming a coordinated operating whole. One set of rotating shafts is specifically connected... Next, the motor drives the shaft to rotate, which in turn drives the connected blades to rotate. The remaining blades rotate synchronously through the linkage rod, ensuring the coordination of the entire blade rotation. As the blades rotate, the channel space inside the valve sleeve gradually opens, allowing air to smoothly enter the feed hopper and feeding chamber through the return air pipe for preheating. By adjusting the rotation angle of the blades, the diameter of the channel inside the return air pipe can be precisely controlled, thereby adjusting the air volume. This adjustment effectively prevents hot air from entering too quickly, thus preventing uneven preheating of the material and reducing the preheating effect, ensuring that the material can receive uniform and effective preheating treatment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a rotary kiln preheater with adjustable air volume.

[0016] Figure 2 This is a schematic diagram of the valve sleeve structure of a rotary kiln preheater with adjustable air volume.

[0017] Figure 3 This is a schematic diagram of the blade structure in a rotary kiln preheater with adjustable air volume.

[0018] Figure 4 In a rotary kiln preheater with adjustable air volume Figure 3 An enlarged schematic diagram of part A of the structure.

[0019] In the diagram: 1. Feed hopper; 2. Secondary return air duct; 3. Tertiary return air duct; 4. Valve sleeve; 5. Feeding pipe; 6. Feeding chamber; 7. Fixed seat; 8. Reinforcing rod; 9. Mounting seat; 10. Blade; 11. Rotating shaft; 12. Swing rod; 13. Motor; 14. Linkage rod; 15. Connecting shaft. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 This utility model provides an adjustable air volume rotary kiln preheater, including: a feed hopper 1, a secondary return air pipe 2 connected to the right side of the feed hopper 1, a tertiary return air pipe 3 connected to the left side of the feed hopper 1, a feeding pipe 5 connected to the bottom of the feed hopper 1, a feeding chamber 6 installed at the lower end of the feeding pipe 5, and the feed hopper 1 and the feeding chamber 6 being interconnected through the feeding pipe 5.

[0022] Specifically, the material enters the feed hopper 1 through the feed pipe, which is the first step in material handling. Next, waste heat return air is introduced through the secondary return air pipe 2 and the tertiary return air pipe 3. These return air pipes are designed to fully utilize thermal energy to preheat the material in the feed hopper 1 and the feeding chamber 6 connected to it. Preheating is a crucial step, as it raises the material temperature, preparing it for subsequent processing. To ensure the uniformity and efficiency of the preheating process, the airflow is finely adjusted by controlling the rotation of the blades 10 inside the control valve sleeve 4 to prevent hot air from entering at too high a speed. This prevents uneven preheating of the material, thus reducing the preheating effect. By controlling the airflow, it is ensured that the material receives uniform and effective preheating, laying a good foundation for subsequent production processes.

[0023] Both the secondary return air duct 2 and the tertiary return air duct 3 are equipped with valve sleeves 4. Blades 10 are rotatably installed inside the valve sleeves 4. A rotating shaft 11 is connected to the outer edge of the blades 10. A rocker arm 12 is fixedly installed on the surface of the rotating shaft 11. A motor 13 is fixedly installed at the end of the rotating shaft 11 away from the blades 10. A linkage rod 14 is rotatably connected to the surface of the rocker arm 12. The rocker arm 12 and the rotating shaft 11 are fixedly connected. A connecting shaft 15 is provided between the rocker arm 12 and the linkage rod 14. The connecting shaft 15 and the linkage rod 14 are fixedly connected. The linkage rod 14 is rotatably connected to the rocker arm 12 through the connecting shaft 15. The rotating shaft 11 and the blades 10 are fixedly connected. The blades 10, the rotating shaft 11, and the rocker arm 12 are all arranged in a ring about the symmetrical center line of the valve sleeves 4.

[0024] Specifically, a set of blades 10 is connected to a set of rotating shafts 11. A set of rocker arms 12 are mounted on these rotating shafts 11. These rocker arms 12 are arranged in a ring around the symmetrical center line of the valve sleeve 4, ensuring the uniformity and symmetry of the structure. Adjacent rocker arms 12 are connected to linkage rods 14 via rotatable connections, forming a linkage mechanism. Both ends of the linkage rods 14 are equipped with connecting shafts 15. These connecting shafts 15 and the rocker arms 12 together constitute a flexible rotating structure. It is worth noting that each rocker arm 12 is connected to two sets of linkage rods 14, located on the left and right sides of the rocker arm 12 respectively. This tightly connects the adjacent blades 10, rotating shafts 11, and rocker arms 12 together. In this design, one set of rotating shafts 11... A motor 13 is installed at the end of the shaft 11. The function of the motor 13 is to drive the shaft 11 to rotate. Since the swing arm 12 is fixedly connected to the shaft 11, the swing arm 12 can swing with the rotation of the shaft 11. During the swinging process, the swing arm 12 uses the rotation structure between itself and the linkage rod 14 to pull the linkage rod 14 to swing together. The linkage rod 14 then pulls the adjacent set of swing arms 12 and the shaft 11 to rotate accordingly. This design ensures that the rotation of several sets of blades 10 can maintain synchronicity. The rotation of the shaft 11 directly drives the blades 10 to flip. By finely adjusting the flipping angle of the blades 10, the diameter of the channel inside the return air duct can be precisely controlled. This adjustment mechanism makes the control of air volume more precise and efficient.

[0025] A mounting base 9 is fixedly installed on the outer wall of the valve sleeve 4. A rotating shaft 11 passes through the surface of the mounting base 9, and a rotating structure is formed between the rotating shaft 11 and the fixed base 7. A fixed base 7 is fixedly installed at the center of the valve sleeve 4, and a reinforcing rod 8 is fixedly installed on the surface of the fixed base 7.

[0026] Specifically, the mounting base 9 makes the installation process between the rotating shaft 11 and the valve sleeve 4 more convenient and efficient. The rotating shaft 11 is inserted between the mounting base 9 and the valve sleeve 4 and is tightly connected to the blade 10. One end of the rotating shaft 11 is firmly fixed to the blade 10, ensuring that the blade 10 can move synchronously with the rotation of the rotating shaft 11. The end of the blade 10 away from the rotating shaft 11 is flexibly rotated to the fixed base 7. This design allows the blade 10 to precisely control the air volume by flipping, thereby achieving the purpose of regulating airflow.

[0027] The working principle of this utility model is as follows:

[0028] In using this invention, the material is first fed into the feed hopper 1 through the feed pipe. Then, waste heat return air is introduced into the feed hopper 1 through the secondary return air pipe 2 and the tertiary return air pipe 3. These return air pipes are designed to maximize the utilization of thermal energy for preheating the material. Preheating is a crucial step in raising the material temperature and preparing it for subsequent processing. To optimize the preheating effect, the airflow is adjusted. The rotating shaft 11 is driven to rotate by the motor 13. Since the swing arm 12 is fixedly connected to the rotating shaft 11, the swing arm 12 can swing with the rotation of the rotating shaft 11. During the swinging process, the swing arm 12 utilizes the rotation between itself and the linkage rod 14... The moving structure pulls the linkage rod 14 to swing together, and the linkage rod 14 in turn pulls the adjacent set of swing rods 12 and rotating shaft 11 to rotate accordingly. This design ensures that the rotation of several sets of blades 10 can maintain synchronicity. The rotation of the rotating shaft 11 directly drives the blades 10 to flip. The flip angle of the blades 10 can be finely adjusted, thereby accurately controlling the channel diameter inside the return air duct. This design ensures the accuracy and efficiency of air volume control, avoids the problem of uneven material preheating caused by hot air entering too quickly. Through precise control of air volume, it ensures that the material can be preheated evenly and effectively, laying a solid foundation for the subsequent production process.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rotary kiln preheater with adjustable air volume, characterized in that, include: Feed hopper (1), the right side of the feed hopper (1) is connected to a secondary return air pipe (2), the left side of the feed hopper (1) is connected to a tertiary return air pipe (3), the interior of the secondary return air pipe (2) and the tertiary return air pipe (3) are both equipped with valve sleeves (4), the interior of the valve sleeves (4) is rotatably equipped with blades (10), the outer edge of the blades (10) is connected to a rotating shaft (11), the surface of the rotating shaft (11) is fixedly equipped with a swing rod (12), the end of the rotating shaft (11) away from the blades (10) is fixedly equipped with a motor (13), the surface of the swing rod (12) is rotatably connected with a linkage rod (14).

2. The rotary kiln preheater with adjustable air volume according to claim 1, characterized in that, The swing arm (12) is fixedly connected to the rotating shaft (11), and a connecting shaft (15) is provided between the swing arm (12) and the linkage rod (14).

3. The rotary kiln preheater with adjustable air volume according to claim 2, characterized in that, The connecting shaft (15) and the linkage rod (14) are fixedly connected, and the linkage rod (14) is rotatably connected to the swing rod (12) through the connecting shaft (15).

4. The rotary kiln preheater with adjustable air volume according to claim 1, characterized in that, The rotating shaft (11) and the blade (10) are fixedly connected, and the blade (10), the rotating shaft (11) and the rocker arm (12) are all distributed in a ring about the symmetrical center line of the valve sleeve (4).

5. A rotary kiln preheater with adjustable air volume according to claim 1, characterized in that, The valve sleeve (4) is fixedly mounted with a mounting base (9) on its outer wall. The rotating shaft (11) passes through the surface of the mounting base (9) and forms a rotating structure with the rotating shaft (11) and the fixed base (7). The valve sleeve (4) is fixedly mounted with a fixed base (7) at its center. The fixed base (7) is fixedly mounted with a reinforcing rod (8) on its surface.

6. A rotary kiln preheater with adjustable air volume according to claim 1, characterized in that, The feed hopper (1) is connected to a feeding pipe (5) at its lower end, and a feeding chamber (6) is installed at the lower end of the feeding pipe (5). The feed hopper (1) and the feeding chamber (6) are interconnected through the feeding pipe (5).

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