Kiln tail waste heat utilization device of rotary cement kiln
By setting up curved pipes and staggered limit plates in the cement rotary kiln tail heat utilization device, the flue gas flows in a "S" shape, the problem of poor utilization of high-temperature flue gas in the existing device is solved, and the further development is achieved Efficient waste heat utilization.
Patent Information
- Application Number
- CN202421144855.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The existing kiln tail waste heat utilization device needs to be discharged immediately after the flue gas enters the recycling box, resulting in a large amount of heat wasted and the high-temperature flue gas utilization effect is not good.
A cement rotary kiln tail heat utilization device is designed, using curved pipes with uniform distribution and interlaced limit plates. The flue gas flows in the "S" shape under the barrier of the limit plates. Increase the contact area and contact duration between high-temperature flue gas and curved pipes.
By increasing the contact area and contact time between the flue gas and the curved pipe, the waste heat utilization effect on high-temperature flue gas is improved, heat waste is reduced, and utilization rate is improved.
Smart Images
Figure CN222438542U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cement rotary kilns, in particular to a cement rotary kiln tail waste heat utilization device. Background Art
[0002] Cement rotary kiln is divided into two categories: internal heating and external heating according to different heating methods. The materials in the internal heating rotary kiln are in direct contact with the flame and flue gas, and the oxidation or reduction atmosphere in the furnace can be adjusted. The inner wall of the cylinder is built with refractory bricks, and the lining of the head and tail hoods is high-strength wear-resistant castables. There is a flexible seal between the head and tail hoods and the cylinder, which can completely prevent dust and leakage. Multi-level support can be adopted to make the cylinder length reach 60 meters. The maximum operating temperature can reach 1600℃, the output is large, and the applicable fuels are liquefied gas, natural gas, coal gas, fuel oil, coal powder, coal, etc.
[0003] A cement rotary kiln generates a large amount of high-temperature flue gas during operation. Generally, a kiln tail waste heat utilization device is used to recycle the flue gas. However, most of the existing kiln tail waste heat utilization devices need to discharge the flue gas immediately after it enters the recovery box to ensure the continuous entry of the flue gas, resulting in a large amount of heat waste, which leads to poor utilization of the high-temperature flue gas. Utility Model Content
[0004] The technical problem to be solved by the utility model is that the existing kiln tail waste heat utilization device has poor utilization effect of high temperature flue gas, resulting in a large amount of heat waste and low utilization rate.
[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a cement rotary kiln tail waste heat utilization device, including a box body, a waste heat utilization structure is arranged in the box body, the waste heat utilization structure includes evenly distributed curved pipes, a water inlet pipe is arranged between one ends of the curved pipes, and a water outlet pipe is arranged between the other ends of the curved pipes, the water inlet pipe and the water outlet pipe are located outside the box body, the upper and lower sides of the box body are provided with limit plates arranged in an upper and lower position staggered, and a filter structure for filtering smoke is arranged in the box body.
[0006] As a further solution of the utility model, the filter structure includes a filter plate, a motor, a screw, a threaded sleeve, and a brush. The filter plate is located between the inner walls of the box body, the motor is located on the top of the box body, the screw is located at the output end of the motor, the threaded sleeve is threadedly connected to the screw, the brush is connected to the threaded sleeve, and the brush is in contact with the surface of the filter plate.
[0007] As a further solution of the utility model, the box body includes an outer wall and an inner wall, and a heat insulation layer is formed between the outer wall and the inner wall.
[0008] As a further solution of the utility model, a sliding block is provided at one side of the threaded sleeve, and a sliding groove is provided on the inner wall of the box body, and the sliding block is slidably matched with the sliding groove.
[0009] As a further solution of the utility model, connecting pipes are provided on both sides of the box body, and the smoke enters from the connecting pipe on one side and is discharged from the connecting pipe on the other side.
[0010] As a further solution of the utility model, the limiting plate is located in each curved space of the curved pipe.
[0011] The advantage of the utility model over the prior art lies in that, by setting a waste heat utilization structure, when the flue gas enters the box, due to the staggered upper and lower positions of the limit plates, the flue gas is blocked by the limit plates and flows through the entire box in an "S" shape, thereby increasing the contact area and contact time between the high-temperature flue gas and the curved pipe, thereby improving the waste heat utilization effect of the high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model is a stereoscopic diagram of a cement rotary kiln tail waste heat utilization device.
[0013] Figure 2 The utility model is a schematic diagram of the internal structure of a cement rotary kiln tail waste heat utilization device.
[0014] Figure 3 The utility model is a schematic diagram of the filter structure of a cement rotary kiln tail waste heat utilization device.
[0015] Figure 4 The utility model is a schematic diagram of the enlarged structure of the A part of a cement rotary kiln tail waste heat utilization device.
[0016] As shown in the figure: 1. Box body; 2. Curved pipe; 3. Water inlet pipe; 4. Water outlet pipe; 5. Limit plate; 6. Filter plate; 7. Motor; 8. Screw; 9. Threaded sleeve; 10. Brush; 11. Outer wall; 12. Inner wall; 13. Insulation layer; 14. Slider; 15. Slide; 16. Connecting pipe. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.
[0019] Combined with Figure 1 , Figure 2 A cement rotary kiln tail waste heat utilization device comprises a box body 1, wherein the box body 1 comprises an outer wall 11 and an inner wall 12, an insulation layer 13 is formed between the outer wall 11 and the inner wall 12, and connecting pipes 16 are provided on both sides of the box body 1, and the smoke enters from the connecting pipe 16 on one side and is discharged from the connecting pipe 16 on the other side.
[0020] Combined with Figure 2 , Figure 3 A waste heat utilization structure is provided in the box body 1, and the waste heat utilization structure includes evenly distributed curved pipes 2, a water inlet pipe 3 is provided between one ends of the curved pipes 2, and a water outlet pipe 4 is provided between the other ends of the curved pipes 2. The water inlet pipe 3 and the water outlet pipe 4 are located outside the box body 1, and the upper and lower sides of the box body 1 are provided with limit plates 5 that are staggered in upper and lower positions. The limit plates 5 are located in each curved space of the curved pipe 2, and a filter structure for filtering smoke is provided in the box body 1.
[0021] Combined with Figure 3 , Figure 4 The filter screen structure includes a filter plate 6, a motor 7, a screw 8, a threaded sleeve 9, and a brush 10. The filter plate 6 is located between the inner walls 12 of the box body 1, the motor 7 is located on the box body 1, the screw 8 is located at the output end of the motor 7, the threaded sleeve 9 is threadedly connected to the screw 8, the brush 10 is connected to the threaded sleeve 9, the brush 10 is in contact with the surface of the filter plate 6, a slider 14 is provided on one side of the threaded sleeve 9, a slide groove 15 is provided on the inner wall 12 of the box body 1, and the slider 14 and the slide groove 15 are slidably matched.
[0022] During the specific implementation of the utility model, firstly, the high-temperature flue gas enters the box body through the connecting pipe at one end, and the dust and other harmful dust in the flue gas are blocked under the filtering action of the filter plate. After the flue gas passes through the filter plate, due to the staggered arrangement of the upper and lower positions of the limit plates, the flue gas is blocked by the limit plates and flows through the entire box body in an "S" shape, thereby increasing the contact area and contact time between the high-temperature flue gas and the curved pipe, and utilizing the waste heat of the high-temperature flue gas to the maximum extent. At the same time, water enters each curved water pipe from the water inlet main pipe, is fully heated by the waste heat of the flue gas, and is then discharged from the water outlet main pipe. At the same time, the temperature of the outer wall of the box body can be reduced under the action of the heat insulation layer to avoid burns. When there is a lot of dust on the filter plate, the motor is started, and the motor drives the brush to sweep the filter plate to avoid dust clogging the filter plate.
[0023] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A cement rotary kiln tail waste heat utilization device, comprising a housing (1), characterized in that: The box body (1) is provided with a waste heat utilization structure, the waste heat utilization structure comprising evenly distributed curved pipes (2), a water inlet pipe (3) is provided between one end of the curved pipe (2), a water outlet pipe (4) is provided between the other end of the curved pipe (2), the water inlet pipe (3) and the water outlet pipe (4) are located outside the box body (1), upper and lower side surfaces of the box body (1) are provided with limit plates (5) arranged in an upper and lower staggered manner, and a filter screen structure for filtering smoke is provided inside the box body (1).
2. The device for utilizing waste heat from the tail of a cement rotary kiln according to claim 1, characterized in that: The filter screen structure comprises a filter plate (6), a motor (7), a screw (8), a threaded sleeve (9), and a brush (10); the filter plate (6) is located between the inner walls (12) of the casing (1); the motor (7) is located on the casing (1); the screw (8) is located at the output end of the motor (7); the threaded sleeve (9) is threadedly connected to the screw (8); the brush (10) is connected to the threaded sleeve (9); and the brush (10) is in contact with the surface of the filter plate (6).
3. The device for utilizing waste heat from the tail of a cement rotary kiln according to claim 1, characterized in that: The box body (1) comprises an outer wall (11) and an inner wall (12), and a heat insulation layer (13) is formed between the outer wall (11) and the inner wall (12).
4. The device for utilizing waste heat from the tail of a cement rotary kiln according to claim 2, characterized in that: A sliding block (14) is provided on one side of the threaded sleeve (9), and a sliding groove (15) is provided on the inner wall (12) of the box body (1), and the sliding block (14) and the sliding groove (15) are slidably matched.
5. The device for utilizing waste heat at the tail of a cement rotary kiln according to claim 1, characterized in that: Connecting pipes (16) are provided on both sides of the box body (1), and the smoke enters from the connecting pipe (16) on one side and is discharged from the connecting pipe (16) on the other side.
6. The device for utilizing waste heat from the tail of a cement rotary kiln according to claim 1, characterized in that: The limiting plate (5) is located in each curved space of the curved pipeline (2).