Device for improving preheating effect of rotary kiln preheater

Abstract

The utility model relates to the technical field of rotary kiln accessory equipment, in particular to a device for improving the preheating effect of a rotary kiln preheater, which comprises a blanking pipe, a hot-air blower arranged on the outer ring surface of the blanking pipe, a hot chamber arranged on the lower side of the hot-air blower, a preheater push plate arranged in the hot chamber, a lifting platform arranged on one side of the preheater push plate, and a lifting platform arranged on the other side of the lifting platform. The lower surface of the lifting platform is fixedly connected with a large-torque motor, the output end of the large-torque motor is fixedly connected with a connecting shaft, the bottom of the connecting shaft is fixedly connected with a rotating plate, and the lower surface of the rotating plate is fixedly connected with a stirrer; the discharging device has the advantages that the horn-shaped baffle at the bottom of the discharging pipe is cut off, the overall heat utilization rate is improved, the cold air mixing amount is reduced, the frequency of a main exhaust fan at the kiln tail is reduced, heat loss is reduced, meanwhile, after the horn-shaped baffle of the discharging pipe is dismantled, the material level at the top of a hot chamber can rise, the material storage in the hot chamber is increased, and the energy consumption is reduced. And the heat utilization efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln auxiliary equipment, in particular to a device for improving the preheating effect of a rotary kiln preheater. Background Art

[0002] A rotary kiln refers to a rotating calcining kiln, commonly known as a rotary kiln. It can be divided into cement kilns, metallurgical chemical kilns, and lime kilns according to the materials it processes.

[0003] In existing rotary kiln combustion processes, the kiln is equipped with a preheating system. Limestone raw material must be preheated in a vertical preheater before entering the rotary kiln chamber for calcination. The original preheater design contained multiple feed pipes, each with a trumpet-shaped baffle at the bottom. This reduced the preheater's hot chamber volume, lowered fuel thermal efficiency, and increased energy consumption. To address this issue, the present utility model proposes a device for improving the preheating efficiency of a rotary kiln preheater. Utility Model Content

[0004] The purpose of the utility model is to provide a device for improving the preheating effect of a rotary kiln preheater, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model provides the following technical solutions: a device for improving the preheating effect of a rotary kiln preheater, comprising: a feed pipe, a hot air blower provided on the outer ring surface of the feed pipe, a hot chamber installed on the lower side of the hot air blower, and a preheater push plate installed in the hot chamber.

[0006] A lifting platform is provided on one side of the preheater push plate, and a high-torque motor is fixedly connected to the lower surface of the lifting platform. The output end of the high-torque motor is fixedly connected to the connecting shaft, and a rotating plate is fixedly connected to the bottom of the connecting shaft. The lower surface of the rotating plate is fixedly connected to the agitator.

[0007] Preferably, the bottom of the discharge pipe is fixedly connected to the heat chamber and communicates with the heat chamber, and the output end of the hot air blower is fixedly sleeved on the outer ring surface of the discharge pipe.

[0008] Preferably, the output end of the cylinder on one side of the preheater push plate is fixedly connected, one side of the cylinder is fixedly connected to the heat chamber, and a feed opening is provided on the lower surface of the heat chamber.

[0009] Preferably, the lower surface of the hot chamber is fixedly connected to the preheater silo, the bottom of the preheater silo is fixedly connected to one end of the feed pipe, the other end of the feed pipe is rotatably sleeved on one end of the rotary kiln body, the other end of the rotary kiln body is rotatably sleeved in the vertical cooler, and the inner wall of the preheater silo is fixedly connected to a heating pipe.

[0010] Preferably, both sides of the lifting platform are fixedly connected to the threaded sleeve, a threaded rod is sleeved inside the threaded sleeve, and a worm gear is fixedly sleeved at the bottom of the threaded rod.

[0011] Preferably, a worm is engaged with one side of the worm wheel, one end of the worm is fixedly connected to the output end of one side of the dual-axis motor, and the dual-axis motor is fixedly installed in the fixed box.

[0012] Preferably, the fixed box is fixedly connected to the preheater silo, and the fixed box is fixedly connected to the limiting frame on both sides. The limiting block is fixedly installed in the limiting frame, the threaded rod is rotatably sleeved in the limiting block, and the threaded sleeve is slidably installed in the limiting frame. The limiting sleeve is fixedly installed on the upper surface of the preheater silo, and the connecting shaft is rotatably sleeved in the limiting sleeve.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Remove the trumpet-shaped baffle at the bottom of the discharge pipe to improve the overall heat utilization rate, reduce the amount of cold air added, and thus reduce the frequency of the main exhaust fan at the kiln tail and reduce heat loss while ensuring the stability of the gas input.

[0015] 2. After the "trumpet"-shaped baffle of the discharge pipe is removed, the material level at the top of the hot chamber can be raised, which increases the material inventory in the hot chamber and effectively improves the heat utilization efficiency.

[0016] 3. The hot air is blown into the discharge pipe by the hot air blower, so that before the material enters the hot chamber, the direction of the material and the hot air is opposite, which increases the falling resistance of the material flow, thereby increasing the contact area between the raw material and the hot air. At the same time, due to the long length of the discharge pipe, the preheating time of the material is increased, thereby achieving a better preheating effect of the material.

[0017] 4. The agitator stirs the material, which is beneficial to the uniform heating of the material. The height of the lifting platform is adjusted to adjust the position of the agitator in the preheater silo, so that the material can be stirred better and more evenly, the particle size of the raw material is reduced, and the contact area with the hot air is increased, thereby achieving a better preheating effect. At the same time, the incoming raw materials can be completely dispersed, further improving the preheating effect of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 This is a top view schematic diagram of the internal structure of the utility model;

[0021] Figure 4 It is a bottom view schematic diagram of the internal structure of the utility model.

[0022] In the figure: 1. discharge pipe; 2. hot air blower; 3. hot chamber; 4. preheater push plate; 5. lifting platform; 6. high-torque motor; 7. connecting shaft; 8. rotating plate; 9. agitator; 10. cylinder; 11. discharge port; 12. preheater hopper; 13. feed pipe; 14. rotary kiln body; 15. vertical cooler; 16. threaded sleeve; 17. threaded rod; 18. worm gear; 19. worm; 20. dual-axis motor; 21. fixing box; 22. limit frame; 23. limit block; 24. limit sleeve; 25. heating pipe. DETAILED DESCRIPTION

[0023] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "one," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] For the purpose of simplicity and illustration, the principles of the embodiments are described primarily with reference to examples. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring the understanding of these embodiments. In addition, all embodiments may be used in combination with each other.

[0027] See also Figures 1 to 4 The utility model provides a technical solution: a device for improving the preheating effect of a rotary kiln preheater, comprising: a feed pipe 1, a hot air blower 2 is arranged on the outer ring surface of the feed pipe 1, a heat chamber 3 is installed under the hot air blower 2, a preheater push plate 4 is installed in the heat chamber 3, the feed pipe 1 is fixedly installed on the top of the heat chamber 3 and is connected to the bottom of the feed pipe 1 and the heat chamber 3, a fixing plate is fixedly connected to the bottom of the hot air blower 2, and the fixing plate is fixedly installed on the outer ring surface of the feed pipe 1, thereby stably supporting the hot air blower 2. The bottom of the feeding pipe 1 is fixedly connected to the heat chamber 3 and communicated with the heat chamber 3. The output end of the hot air blower 2 is fixedly sleeved on the outer ring surface of the feeding pipe 1, and the air outlet of the hot air blower 2 is fixedly sleeved on the outer ring surface of the feeding pipe 1. At the same time, each feeding pipe 1 is provided with a hot air blower 2 at different heights, so as to preheat the hot air at different positions of the feeding pipe 1. The output end of the cylinder 10 on one side of the preheater push plate 4 is fixedly connected, and one side of the cylinder 10 is fixedly connected to the heat chamber 3. A feeding port is provided on the lower surface of the heat chamber 3. 11. The hot air blown out by the hot air blower 2 enters the hot chamber 3, thereby preheating the material falling into the hot chamber 3 again. The output end of the cylinder 10 is fixedly connected to the preheater push plate 4, so that the output end of the cylinder 10 extends, thereby driving the preheater push plate 4 to move, so that the preheater push plate 4 pushes the material from the discharge port 11 opened on the lower side of the hot chamber 3 into the preheater silo 12 for preheating again. The lower surface of the hot chamber 3 is fixedly connected to the preheater silo 12, and the preheater material The bottom of the silo 12 is fixedly connected to one end of the feed pipe 13, and the other end of the feed pipe 13 is rotatably sleeved on one end of the rotary kiln body 14. The other end of the rotary kiln body 14 is rotatably sleeved in the vertical cooler 15. The inner wall of the preheater silo 12 is fixedly connected with a heating pipe 25, and the inner wall of the preheater silo 12 is arranged with a circumferential array of heating pipes 25, thereby improving the uniform preheating of the material. The bottom of the preheater silo 12 is fixedly sleeved with a feed pipe 13 to transport the preheated material.

[0028] The hot air blower 2, the cylinder 10, the rotary kiln body 14, the vertical cooler 15 and the external terminal control device are electrically connected. The material is added from the discharge pipe 1. The hot air blower 2 is fixedly installed on the outer ring surface of the discharge pipe 1. The hot air blower 2 blows the hot air into the discharge pipe 1. Before the material enters the hot chamber 3, the direction of the material and the hot air is opposite, which increases the falling resistance of the material, thereby increasing the contact area between the raw material and the hot air. At the same time, due to the long length of the discharge pipe 1, the preheating time of the material is increased, thereby making the preheating effect of the material better. When the material continues to enter the hot chamber 3, the output of the cylinder 10 is controlled. The output end extends, so that its output end drives the preheater push plate 4 to move in the hot chamber 3, so that the preheater push plate 4 pushes the material from the discharge port 11 into the preheater silo 12, thereby further preheating the material. By cutting off the "trumpet"-shaped baffle at the bottom of the discharge pipe 1, while ensuring the stability of the gas input, the overall heat utilization rate is improved, the amount of cold air added is reduced, and the frequency of the main exhaust fan at the kiln tail is reduced, and the heat loss is reduced. After the "trumpet"-shaped baffle of the discharge pipe 1 is removed, the material level at the top of the preheater silo 12 can be raised, which increases the material inventory in the preheater silo 12 and effectively increases the heat utilization efficiency.

[0029] A lifting platform 5 is provided on one side of the preheater push plate 4. A high-torque motor 6 is fixedly connected to the lower surface of the lifting platform 5. The output end of the high-torque motor 6 is fixedly connected to the connecting shaft 7. A rotating plate 8 is fixedly connected to the bottom of the connecting shaft 7. The lower surface of the rotating plate 8 is fixedly connected to the agitator 9. Both sides of the lifting platform 5 are fixedly connected to the threaded sleeve 16. A threaded rod 17 is provided in the inner sleeve of the threaded sleeve 16. A worm gear 18 is provided on the fixed sleeve at the bottom of the threaded rod 17. The lifting of the lifting platform 5 is driven by the movement of the threaded sleeve 16. The threaded rod 17 is rotated to drive the threaded sleeve 16 to move. A worm 19 is engaged with one side of the worm gear 18. One end of the worm 19 is fixedly connected to the output end of one side of the dual-axis motor 20. The dual-axis motor 20 is fixedly installed in the fixed box 21. There are two worms 19 and they are symmetrically arranged about the dual-axis motor 20. 0 drives the worm 19 to move, so that the worm 19 engages with the worm wheel 18 for transmission, and the worm wheel 18 then drives the threaded rod 17 fixedly sleeved thereon to rotate, and the fixed box 21 is fixedly connected to the preheater silo 12, and the fixed box 21 is fixedly connected to the limit frame 22 on both sides. The limit block 23 is fixedly installed in the limit frame 22, the threaded rod 17 is rotatably sleeved in the limit block 23, and the threaded sleeve 16 is slidably installed in the limit frame 22. A limit sleeve 24 is fixedly installed on the upper surface of the preheater silo 12, and the connecting shaft 7 is rotatably sleeved in the limit sleeve 24. The fixed box 21 is fixedly connected to the top of the preheater silo 12 through a steel column, and the bottom of the limit frame 22 is also fixedly connected to the top of the preheater silo 12. The limit frame 22 limits the sliding position of the threaded sleeve 16, and the limit block 23 is fixedly installed in the limit frame 22, so that the limit frame 22 limits the threaded rod 17.

[0030] The high-torque motor 6, the dual-axis motor 20, and the heating tube 25 are all electrically connected to the external terminal control device. When the preliminarily preheated material is pushed into the preheater silo 12, the heating tube 25 is turned on for heating. The high-torque motor 6 is first started, so that the high-torque motor 6 drives the connecting shaft 7 to rotate. The connecting shaft 7 is rotated in the limit sleeve 24. The limit sleeve 24 limits the connecting shaft 7, so that the rotating plate 8 is driven to rotate in the preheater silo 12 through the connection of the connecting shaft 7. The rotating plate 8 drives the agitator 9 fixed thereon to stir the material, which is beneficial to the uniform heating of the material. At the same time, the dual-axis motor 20 is started. The worm 19 is driven to rotate, and the worm 19 is meshed with the worm wheel 18 for transmission, so that the worm wheel 18 drives the threaded rod 17 to rotate, and the threaded rod 17 rotates under the limiting action of the limit block 23, so that the threaded rod 17 drives the threaded sleeve 16 to move, and the threaded sleeve 16 drives the lifting platform 5 to move, thereby adjusting the height of the lifting platform 5, thereby adjusting the position of the agitator 9 in the preheater silo 12, so as to better and more fully stir the material evenly, reduce the particle size of the raw material, and increase the contact area with the hot air, so as to achieve better preheating effect, and at the same time enable the incoming raw materials to be completely dispersed, further improving the preheating effect of the raw materials.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for improving the preheating effect of a rotary kiln preheater, comprising a feed pipe (1), characterized in that: The outer ring surface of the discharge pipe (1) is provided with a hot air blower (2), a heat chamber (3) is installed on the lower side of the hot air blower (2), and a preheater push plate (4) is installed in the heat chamber (3); A lifting platform (5) is provided on one side of the preheater push plate (4); a high-torque motor (6) is fixedly connected to the lower surface of the lifting platform (5); an output end of the high-torque motor (6) is fixedly connected to a connecting shaft (7); a rotating plate (8) is fixedly connected to the bottom of the connecting shaft (7); and a lower surface of the rotating plate (8) is fixedly connected to a stirrer (9).

2. The device for improving the preheating effect of a rotary kiln preheater according to claim 1, characterized in that: The bottom of the discharge pipe (1) is fixedly connected to the heat chamber (3) and communicates with the heat chamber (3), and the output end of the hot air blower (2) is fixedly sleeved on the outer ring surface of the discharge pipe (1).

3. The device for improving the preheating effect of a rotary kiln preheater according to claim 2, characterized in that: The output end of the cylinder (10) on one side of the preheater push plate (4) is fixedly connected, and one side of the cylinder (10) is fixedly connected to the heat chamber (3), and a feed opening (11) is provided on the lower surface of the heat chamber (3).

4. The device for improving the preheating effect of a rotary kiln preheater according to claim 3, characterized in that: The lower surface of the heat chamber (3) is fixedly connected to the preheater silo (12), the bottom of the preheater silo (12) is fixedly connected to one end of the feed pipe (13), the other end of the feed pipe (13) is rotatably sleeved on one end of the rotary kiln body (14), the other end of the rotary kiln body (14) is rotatably sleeved in the vertical cooler (15), and the inner wall of the preheater silo (12) is fixedly connected to a heating pipe (25).

5. The device for improving the preheating effect of a rotary kiln preheater according to claim 4, characterized in that: The two sides of the lifting platform (5) are fixedly connected to the threaded sleeve (16), the threaded sleeve (16) is provided with a threaded rod (17), and the bottom of the threaded rod (17) is fixedly provided with a worm gear (18).

6. The device for improving the preheating effect of a rotary kiln preheater according to claim 5, characterized in that: A worm (19) is meshed with one side of the worm wheel (18), one end of the worm (19) is fixedly connected to an output end of one side of a dual-axis motor (20), and the dual-axis motor (20) is fixedly installed in a fixed box (21).

7. The device for improving the preheating effect of a rotary kiln preheater according to claim 6, characterized in that: The fixed box (21) is fixedly connected to the preheater silo (12), and the two sides of the fixed box (21) are fixedly connected to the limiting frame (22). The limiting block (23) is fixedly installed in the limiting frame (22), the threaded rod (17) is rotatably sleeved in the limiting block (23), the threaded sleeve (16) is slidably installed in the limiting frame (22), and a limiting sleeve (24) is fixedly installed on the upper surface of the preheater silo (12), and the connecting shaft (7) is rotatably sleeved in the limiting sleeve (24).

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