A rotary kiln waste heat utilization device

Abstract

This utility model relates to the field of rotary kiln waste heat utilization technology, specifically a rotary kiln waste heat utilization device, including a rotary kiln body and an annular insulation shell. The annular insulation shell is installed on the rotary kiln body and is provided with an inlet pipe and an outlet pipe. The bottom of the annular insulation shell is provided with a drain pipe and a support assembly. The drain pipe is provided with a valve. The top of the annular insulation shell is provided with a maintenance box, and the top of the maintenance box has a maintenance groove. A slot is formed between the maintenance groove and the interior of the annular insulation shell, and a maintenance cover is provided on the maintenance groove. This structure achieves effective waste heat recovery by installing an annular insulation shell outside the rotary kiln body and using the inlet and outlet pipes to allow heat exchange liquid to flow through the interior of the insulation shell, directly absorbing the waste heat emitted by the kiln body. A drive motor drives a cleaning brush to rotate, which can periodically clean the scale, impurities, etc. accumulated inside the annular insulation shell.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln waste heat utilization technology, specifically a rotary kiln waste heat utilization device. Background Technology

[0002] As is well known, in industrial production, rotary kilns, as core equipment in industries such as cement, metallurgy, and chemicals, continuously emit a large amount of waste heat from their surfaces during the high-temperature calcination of materials. Statistics show that this waste heat accounts for approximately 15%-25% of the total energy consumption of a rotary kiln. If it cannot be effectively recovered and utilized, it will not only cause serious energy waste but also lead to increased ambient temperature, increased ventilation and cooling costs in the workshop, and even affect the normal operation of surrounding equipment. Currently, various rotary kiln waste heat utilization devices have emerged in the industry, but many problems still need to be solved in their practical application:

[0003] First, the waste heat recovery efficiency declines rapidly. Existing devices mostly adopt a fixed annular heat exchange chamber structure. As the heat exchange liquid flows within the chamber, dust detached from the kiln surface and minerals in the liquid gradually deposit on the inner wall of the heat exchange chamber over time, forming scale and dirt. These deposits have extremely low thermal conductivity, which significantly increases thermal resistance, leading to a continuous decline in waste heat transfer efficiency.

[0004] Secondly, cleaning and maintenance are difficult and costly. Traditional equipment typically has a rigid connection between the heat exchange chamber and the rotary kiln body, and the structure is enclosed. When internal fouling needs to be cleaned, numerous connecting parts must be disassembled, and sometimes the entire heat exchange unit may even need to be detached from the kiln body. This is not only time-consuming and labor-intensive, but frequent disassembly can also damage seals, increasing the equipment failure rate. Therefore, it is necessary to propose a solution to this technical problem. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a rotary kiln waste heat utilization device.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a rotary kiln waste heat utilization device, comprising a rotary kiln body and an annular insulation shell, the annular insulation shell being installed on the rotary kiln body, the annular insulation shell being provided with an inlet pipe and an outlet pipe, the bottom end of the annular insulation shell being provided with a drain pipe and a support assembly, the drain pipe being provided with a valve, the top end of the annular insulation shell being provided with a maintenance box, the top end of the maintenance box being provided with a maintenance groove, the maintenance groove being provided with a slot between the maintenance groove and the interior of the annular insulation shell, the maintenance groove being provided with a maintenance cover, the maintenance cover being provided with a drive motor, the output end of the drive motor extending into the slot and being provided with drive bevel teeth, the interior of the annular insulation shell being provided with bearing seats on both sides, the first bearing seat being provided with an annular bevel teeth, the drive bevel teeth meshing with the annular bevel teeth, the annular bevel teeth being provided with a cleaning brush between the annular bevel teeth and the second bearing seat, and a fastening mechanism being provided between the maintenance box and the maintenance cover.

[0009] Furthermore, the present invention is improved in that the fastening mechanism includes a fastening box and an inclined groove. The inclined groove is formed on one side of the maintenance cover, and the fastening box is installed on one side of the maintenance box. The interior of the fastening box is connected to the maintenance groove through the fastening groove and is provided with an inclined plate. A fastening plate is provided between the inclined plate and the interior of the fastening box. A compression spring is provided between the fastening plate and the interior of the fastening box. An adjusting post is provided on one side of the fastening plate, and the adjusting post extends to the outside of the fastening box. A locking mechanism is provided between the fastening box and the inclined plate.

[0010] Furthermore, the present invention is improved in that the locking mechanism includes a toothed groove and a toothed plate. The toothed groove is formed at the top of the inclined plate, and the toothed plate is located inside the fastening box and engages with the toothed groove. A lifting column is provided at the top of the toothed plate, and the lifting column extends to the outside of the fastening box.

[0011] Furthermore, the present invention is improved in that the cleaning brush is provided in a plurality of them and arranged in a circular array.

[0012] Furthermore, the present invention is improved by providing a high-temperature resistant rubber sealing gasket around the bottom of the maintenance cover.

[0013] Furthermore, the present invention is improved in that both the inlet pipe and the outlet pipe are provided with flanges.

[0014] Furthermore, an improvement of this utility model is that the drive motor is a servo motor.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a rotary kiln waste heat utilization device, which has the following beneficial effects:

[0017] This rotary kiln waste heat recovery device utilizes an annular insulating shell installed outside the rotary kiln body. Inlet and outlet pipes allow heat exchange liquid to flow through the interior of the insulating shell, directly absorbing the waste heat emitted by the kiln and transferring the heat energy to the stages requiring heating. This achieves effective waste heat recovery and reduces energy waste. The device incorporates a cleaning brush driven by a motor and bevel gear set. The motor rotates the brush to periodically clean accumulated scale and impurities inside the annular insulating shell. Wastewater from cleaning is discharged through a drain pipe and valve, preventing scale from affecting heat conduction and ensuring long-term stable heat exchange efficiency. No manual entry into the enclosed cavity for cleaning is required, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a first-view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0020] Figure 3 This utility model Figure 1 Enlarged front half-sectional view of the central annular insulation shell;

[0021] Figure 4 This utility model Figure 1 Enlarged left half-section view of the central annular insulation shell.

[0022] In the diagram: 1. Rotary kiln body; 2. Annular insulation shell; 3. Inlet pipe; 4. Outlet pipe; 5. Drain pipe; 6. Support assembly; 7. Valve; 8. Maintenance box; 9. Maintenance cover; 10. Drive motor; 11. Drive bevel gear; 12. Bearing seat; 13. Annular bevel gear; 14. Cleaning brush; 15. Fastening box; 16. Inclined groove; 17. Inclined plate; 18. Fastening plate; 19. Compression spring; 20. Adjusting column; 21. Gear groove; 22. Gear plate; 23. Lifting column; 24. Flange. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4This utility model relates to a rotary kiln waste heat utilization device, comprising a rotary kiln body 1 and an annular insulation shell 2. The annular insulation shell 2 is mounted on the rotary kiln body 1. The annular insulation shell 2 is provided with an inlet pipe 3 and an outlet pipe 4. The bottom end of the annular insulation shell 2 is provided with a drain pipe 5 and a support assembly 6. The drain pipe 5 is provided with a valve 7. The top end of the annular insulation shell 2 is provided with a maintenance box 8. The top end of the maintenance box 8 has a maintenance groove. A slot is formed between the maintenance groove and the interior of the annular insulation shell 2. The maintenance groove is provided with a maintenance cover 9. The maintenance cover 9 is provided with a drive motor 10. The output end of the drive motor 10 extends into the slot and is provided with a drive bevel gear 11. Bearing seats 12 are provided on both sides of the interior of the annular insulation shell 2. An annular bevel gear 13 is provided on the first bearing seat 12. The drive bevel gear 11 meshes with the annular bevel gear 13. A cleaning brush 14 is provided between the annular bevel gear 13 and the second bearing seat 12. A fastening mechanism is provided between the maintenance box 8 and the maintenance cover 9. In this embodiment, by installing the annular insulation shell 2 on the rotary kiln body 1, the heat exchange liquid can flow through the interior of the insulation shell using the inlet pipe 3 and outlet pipe 4 on the annular insulation shell 2, absorbing the heat emitted by the rotary kiln. The residual heat is utilized, and the support component 6 provides support. After long-term use, scale and other impurities accumulate inside the annular insulation shell 2, affecting heat transfer efficiency. At this time, the output of the drive motor 10 is controlled to rotate, driving the bevel gear 11. The bevel gear 11 meshes with the annular bevel gear 13, driving the cleaning brush 14 to rotate. Two bearing seats 12 ensure stable rotation of the annular bevel gear 13 and the cleaning brush 14. The cleaning brush 14 effectively cleans scale and other foreign matter adhering to the inside of the annular insulation shell 2. Then, by opening the valve 7, water containing impurities and foreign matter is discharged through the drain pipe 5, removing impurities or accumulated liquid from the insulation shell. After shutting down the drive motor 10, automatic cleaning can be achieved. When the cleaning brush 14 needs to be replaced after long-term use, the fastening mechanism is used to release the maintenance cover 9, and then the maintenance cover 9 can be removed. The cleaning brush 14 can then be replaced by slotting. The cleaning brush 14, the annular bevel gear 13, and the bearing seat 12 are installed and fixed using a traditional assembly method. Alternatively, bolts or other parts could be used for installation and fixing, but this will not be detailed here. This method also facilitates the inspection and maintenance of the drive motor 10 and enables the recovery and utilization of waste heat from the rotary kiln. The waste heat is removed through liquid heat exchange and can be used in other processes requiring heat energy, improving energy efficiency. Simultaneously, the cleaning brush 14 can be periodically cleaned internally to ensure normal operation and heat exchange efficiency of the equipment. The maintenance box 8 and maintenance cover 9 facilitate equipment maintenance and repair.

[0025] To facilitate the fastening of the maintenance cover 9, in this design, the fastening mechanism includes a fastening box 15 and an inclined groove 16. The inclined groove 16 is formed on one side of the maintenance cover 9. The fastening box 15 is installed on one side of the maintenance box 8. The interior of the fastening box 15 is connected to the maintenance groove through the fastening groove and is provided with an inclined plate 17. A fastening plate 18 is provided between the inclined plate 17 and the interior of the fastening box 15. A compression spring 19 is provided between the fastening plate 18 and the interior of the fastening box 15. An adjusting post 20 is provided on one side of the fastening plate 18. 20 extends to the outside of the fastening box 15. A locking mechanism is provided between the fastening box 15 and the inclined plate 17. The locking mechanism includes a toothed groove 21 and a toothed plate 22. The toothed groove 21 is opened at the top of the inclined plate 17. The toothed plate 22 is located inside the fastening box 15 and engages with the toothed groove 21. A lifting column 23 is provided at the top of the toothed plate 22. The lifting column 23 extends to the outside of the fastening box 15. In the fastening mechanism, firstly, the adjusting column 20 is pulled, thereby causing the adjusting column 20 to drive the inclined plate 17 to move through the fastening plate 18. One end of plate 17 is removed from the maintenance slot. After the maintenance cover 9 is placed, the adjusting column 20 is released, and the elastic support force of the compression spring 19 pushes the fastening plate 18, causing the fastening plate 18 to apply force to the inclined plate 17. The inclined plate 17 then generates a fastening force on the maintenance cover 9. The position of the fastening plate 18 can be adjusted by adjusting the adjusting column 20, thereby adjusting the tightness of the maintenance cover 9. This ensures that the maintenance cover 9 is firmly fixed, preventing it from loosening during equipment operation, guaranteeing the sealing of the maintenance box 8 and the stability of equipment operation, while also facilitating tightness adjustment as needed. Lifting the lifting column 23 allows the toothed plate 22 to leave the toothed groove 21, facilitating the movement of the inclined plate 17 via the adjusting column 20. When the inclined plate 17 rests against the inclined groove 16, pushing the lifting column 23 downwards causes the toothed plate 22 to engage against the toothed groove 21, thus firmly fixing the inclined plate 17 in place through the toothed groove 21. Moreover, through gravity and engagement, there will be no loosening, further enhancing the stability and reliability of the fastening mechanism, preventing the fastening plate 18 from moving automatically due to vibration or other reasons, ensuring that the maintenance cover 9 is always in a fastened state, and guaranteeing the normal operation of the equipment.

[0026] To improve cleaning efficiency, in this design, multiple cleaning brushes 14 are arranged in a circular array. These multiple brushes can simultaneously clean the interior of the annular insulation shell 2, covering a larger area. This improves cleaning efficiency and effectiveness, enabling a more comprehensive cleaning of the interior of the annular insulation shell 2, reducing dirt and debris residue, and better maintaining the heat exchange performance and normal operation of the equipment.

[0027] To improve the sealing between the maintenance tank and the maintenance cover 9, in this design, a high-temperature resistant rubber sealing gasket is provided around the bottom of the maintenance cover 9. The high-temperature resistant rubber sealing gasket has good elasticity and high-temperature resistance. When the maintenance cover 9 is placed on the maintenance tank, the sealing gasket is squeezed and fills the gap between the maintenance cover 9 and the maintenance tank, which enhances the sealing of the maintenance box 8 and prevents high-temperature gas or dust from entering from the connection between the maintenance cover 9 and the maintenance box 8, protecting the internal components. It also prevents heat loss and helps to improve the waste heat recovery efficiency.

[0028] To facilitate the connection of the inlet pipe 3 and the outlet pipe 4 with other equipment, in this design, both the inlet pipe 3 and the outlet pipe 4 are equipped with flanges 24, which can be used to quickly and securely connect the pipes to other equipment such as heat exchangers and liquid storage tanks through bolts and other connecting parts.

[0029] To precisely control the rotation speed of the cleaning brush 14, in this design, the drive motor 10 is a servo motor, which features high precision, high response speed, and excellent control performance. It can precisely control the rotation speed and angle according to the instructions of the control system, thereby precisely controlling the rotation speed of the cleaning brush 14.

[0030] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary kiln waste heat utilization device, comprising a rotary kiln body (1) and an annular insulation shell (2), characterized in that, The annular insulation shell (2) is installed on the rotary kiln body (1). The annular insulation shell (2) is provided with an inlet pipe (3) and an outlet pipe (4). The bottom end of the annular insulation shell (2) is provided with a drain pipe (5) and a support assembly (6). The drain pipe (5) is provided with a valve (7). The top end of the annular insulation shell (2) is provided with a maintenance box (8). The top end of the maintenance box (8) is provided with a maintenance groove. A groove is provided between the maintenance groove and the interior of the annular insulation shell (2). The maintenance groove is provided with a maintenance cover (9). A drive motor (10) is provided on the cover (9). The output end of the drive motor (10) extends into the slot and is provided with a drive bevel tooth (11). Bearing seats (12) are provided on both sides inside the annular heat insulation shell (2). Annular bevel teeth (13) are provided on the first bearing seat (12). The drive bevel teeth (11) mesh with the annular bevel teeth (13). A cleaning brush (14) is provided between the annular bevel teeth (13) and the second bearing seat (12). A fastening mechanism is provided between the maintenance box (8) and the maintenance cover (9).

2. The rotary kiln waste heat utilization device according to claim 1, characterized in that, The fastening mechanism includes a fastening box (15) and an inclined groove (16). The inclined groove (16) is opened on one side of the maintenance cover (9). The fastening box (15) is installed on one side of the maintenance box (8). The interior of the fastening box (15) is connected to the maintenance groove through the fastening groove and is provided with an inclined plate (17). A fastening plate (18) is provided between the inclined plate (17) and the interior of the fastening box (15). A compression spring (19) is provided between the fastening plate (18) and the interior of the fastening box (15). An adjusting column (20) is provided on one side of the fastening plate (18). The adjusting column (20) extends to the outside of the fastening box (15). A locking mechanism is provided between the fastening box (15) and the inclined plate (17).

3. The rotary kiln waste heat utilization device according to claim 2, characterized in that, The locking mechanism includes a toothed groove (21) and a toothed plate (22). The toothed groove (21) is opened at the top of the inclined plate (17). The toothed plate (22) is located inside the fastening box (15) and engages with the toothed groove (21). The top of the toothed plate (22) is provided with a lifting column (23), which extends to the outside of the fastening box (15).

4. The rotary kiln waste heat utilization device according to claim 3, characterized in that, The cleaning brush (14) is provided in multiple and arranged in a ring array.

5. A rotary kiln waste heat utilization device according to claim 4, characterized in that, The bottom of the maintenance cover (9) is provided with a high-temperature resistant rubber sealing gasket.

6. A rotary kiln waste heat utilization device according to claim 5, characterized in that, Flanges (24) are provided on both the inlet pipe (3) and the outlet pipe (4).

7. A rotary kiln waste heat utilization device according to claim 6, characterized in that, The drive motor (10) is a servo motor.

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