A cement kiln heat energy cascade recovery device

Abstract

The utility model relates to cement kiln heat energy technical field discloses a cement kiln heat energy step -by -step recovery device, including the shell, the inner wall fixedly connected with the aperture plate of shell, the outer wall of multiple aperture plate all is established with the hole, the outer wall top of aperture plate all is fixedly connected with the frame, the inner wall of multiple frame all is fixedly connected with the finned tube, the outer wall of multiple finned tube all is established with the screw groove, the front and back end of finned tube all are established with the water inlet, the top rear side of frame all is fixedly connected with the water inlet pipe, the top front side of frame all is fixedly connected with the water outlet pipe, the bottom of multiple water inlet pipe and water outlet pipe all are connected with the connecting pipe. In the utility model, after flowing to the other side of frame, entering left side bottom frame through frame bottom aperture plate, hot gas is partially consumed, again to right side bottom frame through shell inner wall bottom, after consuming again, entering right side top frame, finally discharging through the exhaust pipe.

Description

Technical Field

[0001] This utility model relates to the field of cement kiln thermal energy technology, and in particular to a cement kiln thermal energy cascade recovery device. Background Technology

[0002] Cement kilns are the core equipment in the cement production process. Their main function is to calcine cement raw materials, which are mainly composed of limestone, clay and iron ore powder mixed in a certain proportion, into clinker at high temperatures. Clinker is an indispensable key intermediate product in cement production. After being mixed and ground with gypsum and other materials, it can be made into finished cement products. Therefore, the operating status of cement kilns directly determines the output and quality of cement. However, cement kilns consume a lot of energy during operation, and the energy utilization rate is low. Because the calcination process requires maintaining a high-temperature environment, a lot of waste heat is generated on the surface of the kiln, in the exhaust gas, and during the cooling of clinker. Therefore, the recovery and utilization of heat energy in cement kilns has important practical significance.

[0003] However, traditional heat recovery devices suffer from significant temperature differences in waste heat generated in different parts of cement kilns. A single recovery device cannot rationally utilize the heat energy based on its grade. Furthermore, the unstable heat supply due to the varying speeds of hot air entering the recovery device leads to energy waste. Moreover, some low-temperature waste heat resources are not effectively captured. While distributed low-temperature heat exchangers, combined with heat pipe technology to enhance heat exchange and intelligent temperature control systems, are currently used to accurately capture waste heat and improve low-temperature heat recovery rates, single recovery devices still cannot rationally utilize the required heat energy, resulting in inefficient use of high-grade heat energy and limited improvement in energy utilization. Additionally, they cannot adjust the distribution and utilization of heat energy in real time according to changes in operating conditions, leading to unstable system operating efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a cement kiln heat energy cascade recovery device, which aims to improve the problem in the existing technology that a single recovery device cannot make reasonable use of the required heat gas and adjust the heat energy rate in real time according to changes in operating conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cement kiln heat energy cascade recovery device, comprising a shell, a perforated plate fixedly connected to the inner wall of the shell, holes formed on the outer walls of multiple perforated plates, a frame fixedly connected to the top of the outer walls of multiple perforated plates, finned tubes fixedly connected to the inner walls of multiple frames, threaded grooves formed on the outer walls of multiple finned tubes, water inlets formed at the front and rear ends of multiple finned tubes, water inlet pipes fixedly connected to the rear top of multiple frames, water outlet pipes fixedly connected to the front top of multiple frames, connecting pipes connected to the bottom of multiple water inlet pipes and water outlet pipes, and connecting pipes connected to the ends of multiple connecting pipes at the water inlets, and an adjustment mechanism fixedly connected to the front outer wall of the shell, the adjustment mechanism being used to adjust the hot air flow speed.

[0006] As a further description of the above technical solution: The adjustment mechanism includes an air intake pipe, the end of which is connected to the outer shell. A protective shell is fixedly connected to the middle of the outer wall of the air intake pipe. Air inlets are provided on both the front and rear sides of the outer wall of the protective shell. A screw is threadedly connected to the top of the inner wall of the protective shell. A support column is fixedly connected to the bottom of the outer wall of the screw. A small ring is fixedly connected to the top of the outer wall of the support column. A large ring is fixedly connected to the middle of the outer wall of the support column. A sealing ring is fixedly connected to the bottom of the outer wall of the support column.

[0007] As a further description of the above technical solution: A handle is fixedly connected to the top of the screw, and a graduated ring is fixedly connected to the middle of the outer wall of the screw.

[0008] As a further description of the above technical solution: A support plate is fixedly connected to the outer wall of the outer shell, and a support block is fixedly connected to both the support plate and the top of the outer wall of the outer shell. An exhaust pipe is connected to the rear side of the outer wall of the outer shell.

[0009] As a further description of the above technical solution: A cold water tank is fixedly connected to the top of the multiple support blocks, and a cold water pipe is connected to the outer wall of the cold water tank. The top of the multiple cold water pipes is connected to the water inlet pipe.

[0010] As a further description of the above technical solution: Each of the support blocks is fixedly connected to a hot water tank (first type) and a hot water tank (second type).

[0011] As a further description of the above technical solution: The outer wall of the hot water tank is connected to a medium-temperature pipe, and the outer wall of the hot water tank is connected to a medium-temperature pipe. Both the medium-temperature pipe and the medium-temperature pipe are connected to the water outlet pipe.

[0012] As a further description of the above technical solution: The outer wall of the second hot water tank is connected to a high-temperature pipe, and the outer wall of the second hot water tank is connected to a high-temperature pipe.

[0013] This utility model has the following beneficial effects: 1. In this utility model, hot air first enters the outer shell through the air inlet pipe, and cold water in the cold water tank is transported to multiple finned tubes inside the outer shell through the cold water pipe. The hot air first reaches the top frame on the left side of the inner wall of the outer shell, flows through the gap to the outer wall of the finned tube, and the screw groove on the outer wall of the finned tube prolongs the residence time of the hot air. After flowing to the other side of the frame, it enters the bottom frame on the left side through the bottom perforated plate of the frame. The hot air is partially consumed, and then flows through the bottom of the inner wall of the outer shell to the bottom frame on the right side. After being consumed again, it enters the top frame on the right side and is finally discharged through the exhaust pipe.

[0014] 2. In this utility model, when hot air needs to enter the outer shell, the screw is rotated to move it up and down along the texture of the protective shell. When hot air needs to enter, the screw is rotated downwards, causing the bottom support column and the sealing ring at the bottom of the support column to move down. The large ring in the middle of the support column fits with the air inlet, and the hot air flows into the outer shell through the large ring. When it needs to flow in slowly, the screw is rotated again to continue moving down. The large ring moves down, and the small ring at the top of the screw fits with the air inlet. Because the hollow area of ​​the small ring is small, the flow rate of hot air is reduced. Attached Figure Description

[0015] Figure 1 This is a front perspective view of a cement kiln heat energy cascade recovery device proposed in this utility model; Figure 2 This is a top view of a cement kiln heat energy cascade recovery device proposed in this utility model; Figure 3 This is a partial structural diagram of the cold water tank of a cement kiln heat energy cascade recovery device proposed in this utility model; Figure 4 This is a partial structural diagram of the frame of a cement kiln heat energy cascade recovery device proposed in this utility model; Figure 5 This is a partial structural diagram of a finned tube for a cement kiln heat energy cascade recovery device proposed in this utility model. Figure 6 This is a partial structural disassembly diagram of the protective shell of a cement kiln heat energy cascade recovery device proposed in this utility model.

[0016] Legend: 1. Outer shell; 2. Adjustment mechanism; 201. Air inlet pipe; 202. Protective shell; 203. Air inlet; 204. Screw; 205. Support column; 206. Small ring; 207. Large ring; 208. Sealing ring; 3. Orifice plate; 4. Hole; 5. Frame; 6. Finned tube; 7. Screw groove; 8. Water inlet; 9. Connecting pipe; 10. Water inlet pipe; 11. Water outlet pipe; 12. Support block; 13. Cold water tank; 14. Cold water pipe; 15. Hot water tank one; 16. Medium temperature pipe one; 17. Medium temperature pipe two; 18. Hot water tank two; 19. High temperature pipe one; 20. High temperature pipe two; 21. Handle; 22. Exhaust pipe; 23. Scale ring; 24. Support plate. Detailed Implementation

[0017] 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.

[0018] Please see the appendix Figure 3 - Appendix Figure 5 An embodiment of this utility model provides a cement kiln heat energy cascade recovery device, including an outer shell 1. The inner wall of the outer shell 1 is fixedly connected with multiple perforated plates 3. Each perforated plate 3 has a certain number of holes 4 on its outer wall. These holes 4 optimize the heat energy transfer efficiency. A frame 5 is firmly fixedly connected to the top of the outer wall of each perforated plate 3. The inner wall of these frames 5 is also fixedly connected with multiple finned tubes 6. The outer wall of the finned tubes 6 is designed with screw grooves 7 to enhance the heat exchange effect. Water inlets 8 are opened at both the front and rear ends of each finned tube 6 to ensure smooth water flow. A water inlet pipe 10 is fixedly connected to the rear side of the top of the frame 5, and a water outlet pipe 11 is fixedly connected to the front side of the top. The bottoms of the multiple water inlets 10 and water outlet pipes 11 are interconnected by connecting pipes 9. The ends of these connecting pipes 9 are tightly connected to the water inlets 8 of the finned tubes 6. An adjustment mechanism 2 is fixedly connected to the front side of the outer wall of the outer shell 1. The adjustment mechanism 2 is used to adjust the hot air flow speed. Specifically, multiple perforated plates 3 are fixed to the inner wall of the outer shell 1, and holes 4 are opened on the outer wall of the perforated plates 3 to optimize heat transfer efficiency. A frame 5 is fixed to the top of the outer wall of the perforated plates 3, and multiple finned tubes 6 are fixed to the inner wall of the frame 5. The outer wall of the finned tubes 6 is designed with screw grooves 7 to enhance the heat exchange effect. Water inlets 8 are opened at both ends of the finned tubes 6 to ensure smooth water flow. A water inlet pipe 10 is fixed to the rear side of the top of the frame 5, and a water outlet pipe 11 is fixed to the front side. A connecting pipe 9 connects the water inlet pipe 10 and the water outlet pipe 11 and is tightly connected to the water inlet 8. An adjustment mechanism 2 is fixed to the front side of the outer wall of the outer shell 1 to adjust the hot air flow speed.

[0019] Please see the appendix Figure 5 - Appendix Figure 6 The regulating mechanism 2 specifically includes an air inlet pipe 201. One end of the air inlet pipe 201, i.e., the terminal part, is connected to the outer shell 1 to ensure smooth gas flow. A protective shell 202 is fixedly connected to the middle of the outer wall of the air inlet pipe 201. The main function of the protective shell 202 is to protect the internal structure from external damage. Air inlets 203 are opened on both the front and rear sides of the outer wall of the protective shell 202 to facilitate the smooth entry of gas. A screw 204 is fixedly connected to the top of the inner wall of the protective shell 202 by a threaded connection. A support column 205 is fixedly connected to the bottom of the outer wall of the screw 204. The main function of the support column 205 is to provide structural support. A small ring 206 is fixedly connected to the top of the outer wall of the support column 205 for connecting or fixing other small parts. A large ring 207 is fixedly connected to the middle of the outer wall of the support column 205 for connecting or fixing other large parts. A sealing ring 208 is fixedly connected to the bottom of the outer wall of the support column 205. The main function of the sealing ring 208 is to ensure the gas sealing and prevent leakage. Specifically, the regulating mechanism 2 includes an air inlet pipe 201, one end of which is connected to the outer casing 1 to ensure gas flow. A protective shell 202 is fixed in the middle of the outer wall of the air inlet pipe 201 to protect the internal structure from external damage. Air inlets 203 are opened on the front and rear sides of the outer wall of the protective shell 202 to facilitate gas entry. A screw 204 is threaded to the top of the inner wall of the protective shell 202. A support column 205 is fixed to the bottom of the outer wall of the screw 204 to provide structural support. A small ring 206 is fixed to the top of the outer wall of the support column 205 to connect small components, a large ring 207 is fixed in the middle to connect large components, and a sealing ring 208 is fixed at the bottom to ensure gas sealing and prevent leakage.

[0020] Please see the appendix Figure 1 - Appendix Figure 3A handle 21 is securely fixed to the top of the screw 204 for easy operation. This handle 21 is used to manually rotate the screw 204 to achieve corresponding mechanical adjustments. A graduated ring 23 is fixedly connected to the middle of the outer wall of the screw 204. This graduated ring 23 is marked with precise graduations, allowing the user to make precise adjustments as needed. A support plate 24 is securely fixed to the outer wall of the housing 1. This support plate 24 mainly enhances the stability and load-bearing capacity of the entire device. Both the support plate 24 and the top of the outer wall of the housing 1 are... Support blocks 12 are fixedly connected to the outer wall of the outer casing 1. These support blocks 12 are evenly distributed and connected to an exhaust pipe 22 at the rear side of the outer wall. The exhaust pipe 22 is used to discharge the exhaust gas generated inside the device and ensure ventilation of the internal environment. A cold water tank 13 is fixedly connected to the top of the multiple support blocks 12. The cold water tank 13 is mainly used to store cooling water. Multiple cold water pipes 14 are connected to the outer wall of the cold water tank 13. These cold water pipes 14 are used to transport the cooling water in the cold water tank 13 to the heating part. The top of the multiple cold water pipes 14 are all connected to the water inlet pipe 10. Specifically, a handle 21 is fixed to the top of the screw 204 for manual rotation of the screw 204 to achieve mechanical adjustment. A scale ring 23 is fixed to the middle of the outer wall of the screw 204, marked with precise scales for easy adjustment. A support plate 24 is fixed to the outer wall of the outer shell 1 to enhance the stability and load-bearing capacity of the device. A support block 12 is fixed to the top of the support plate 24 and the outer wall of the outer shell 1. An exhaust pipe 22 is connected to the rear side of the outer wall of the outer shell 1 to discharge exhaust gas and ensure ventilation. A cold water tank 13 is fixed to the top of multiple support blocks 12 to store cooling water. Multiple cold water pipes 14 are connected to the outer wall of the cold water tank 13 to transport cooling water to the heating part. The top of the cold water pipe 14 is connected to the water inlet pipe 10.

[0021] Please see the appendix Figure 2 - Appendix Figure 4 Hot water tank 15 is firmly fixedly connected to the top of support block 12, and hot water tank 28 is also firmly fixedly connected to the top of support block 12. The outer wall of hot water tank 15 is connected to medium temperature pipe 16 through a pipe connection, and the outer wall of hot water tank 15 is also connected to medium temperature pipe 27 through a pipe connection. Both medium temperature pipe 16 and medium temperature pipe 27 are connected to water outlet pipe 11 to ensure smooth water flow. In addition, the outer wall of hot water tank 28 is also connected to high temperature pipe 19 through a pipe connection, and the outer wall of hot water tank 28 is also connected to high temperature pipe 20 through a pipe connection, thereby realizing the effective management and transportation of water at different temperatures. Specifically, the top of the support block 12 is firmly fixed to hot water tank 15 and hot water tank 2 18. The outer wall of hot water tank 15 is connected to medium temperature pipe 16 and medium temperature pipe 2 17 through pipes. Both are connected to the outlet pipe 11 to ensure smooth water flow and realize the collection and transportation of medium temperature water. The outer wall of hot water tank 2 18 is connected to high temperature pipe 19 and high temperature pipe 20 through pipes, which can effectively collect and transport high temperature water. In this way, through the connection of different pipes and water tanks, the effective management and transportation of water at different temperatures can be realized to meet different water needs.

[0022] Working principle: First, hot air enters the interior of the outer shell 1 through the air inlet pipe 201. At this time, the cold water in the cold water tank 13 is transported to the multiple finned tubes 6 inside the outer shell 1 through the cold water pipe 14. Then, the hot air first comes to the frame 5 on the top left side of the inner wall of the outer shell 1 and flows to the outer wall of the finned tubes 6 through the gaps in the frame 5. At this time, due to the screw grooves 7 on the outer wall of the finned tubes 6, the hot air stays in the finned tubes 6 for a longer time. Then, after flowing to the other side of the top left frame 5, the hot air enters the bottom left frame 5 through the perforated plate 3 at the bottom of the frame 5. At this time, some of the hot air has been consumed. After the finned tubes 6 at the bottom left circulate with the hot air, the hot air comes to the bottom right frame 5 along the bottom of the inner wall of the outer shell 1. At this time, the hot air is consumed again and enters the top right frame 5. Then, it is discharged to the outside through the exhaust pipe 22. Through different stages of heat recovery, the hot air is fully utilized. When hot air needs to enter the outer casing 1, the screw 204 can be rotated to move up and down along the corresponding texture of the protective casing 202. When hot air needs to enter, the screw 204 can be rotated to move downward, which in turn moves the support column 205 at the bottom of the screw 204 downward, causing the sealing ring 208 at the bottom of the support column 205 to move downward. Then, the large ring 207 in the middle of the support column 205 fits into the air inlet 203, allowing hot air to flow into the outer casing 1 through the large ring 207. When hot air needs to flow in slowly, the screw 204 can be rotated again to move downward, causing the large ring 207 to move downward. Then, the small ring 206 at the top of the screw 204 fits into the air inlet 203. Since the hollow area of ​​the small ring 206 is smaller than that of the large ring 207, the speed at which hot air flows into the air inlet pipe 201 is reduced, thus allowing for free adjustment of the hot air flow rate.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cement kiln heat energy cascade recovery device, comprising a shell (1), characterized in that: The inner wall of the outer shell (1) is fixedly connected to a perforated plate (3). The outer walls of the perforated plates (3) are provided with holes (4). The top of the outer walls of the perforated plates (3) are fixedly connected to a frame (5). The inner walls of the frames (5) are fixedly connected to finned tubes (6). The outer walls of the finned tubes (6) are provided with screw grooves (7). The front and rear ends of the finned tubes (6) are provided with water inlets (8). The rear top side of the frame (5) is fixedly connected to a water inlet pipe (10). The front top side of the frame (5) is fixedly connected to a water outlet pipe (11). The bottom of the multiple water inlets (10) and water outlet pipes (11) are connected to a connecting pipe (9). The ends of the multiple connecting pipes (9) are connected to the water inlets (8). The front side of the outer wall of the outer shell (1) is fixedly connected to an adjustment mechanism (2). The adjustment mechanism (2) is used to adjust the flow rate of hot air.

2. The cement kiln heat energy cascade recovery device according to claim 1, characterized in that: The adjustment mechanism (2) includes an air inlet pipe (201), the end of which is connected to the outer shell (1). A protective shell (202) is fixedly connected to the middle of the outer wall of the air inlet pipe (201). An air inlet (203) is provided on both the front and rear sides of the outer wall of the protective shell (202). A screw (204) is threadedly connected to the top of the inner wall of the protective shell (202). A support column (205) is fixedly connected to the bottom of the outer wall of the screw (204). A small ring (206) is fixedly connected to the top of the outer wall of the support column (205). A large ring (207) is fixedly connected to the middle of the outer wall of the support column (205). A sealing ring (208) is fixedly connected to the bottom of the outer wall of the support column (205).

3. The cement kiln heat energy cascade recovery device according to claim 2, characterized in that: A handle (21) is fixedly connected to the top of the screw (204), and a scale ring (23) is fixedly connected to the middle of the outer wall of the screw (204).

4. The cement kiln heat energy cascade recovery device according to claim 1, characterized in that: A support plate (24) is fixedly connected to the outer wall of the outer shell (1). A support block (12) is fixedly connected to both the support plate (24) and the top of the outer wall of the outer shell (1). An exhaust pipe (22) is connected to the rear side of the outer wall of the outer shell (1).

5. A cement kiln heat energy cascade recovery device according to claim 4, characterized in that: A cold water tank (13) is fixedly connected to the top of the multiple support blocks (12), and a cold water pipe (14) is connected to the outer wall of the cold water tank (13). The top of the multiple cold water pipes (14) is connected to the water inlet pipe (10).

6. The cement kiln heat energy cascade recovery device according to claim 4, characterized in that: Hot water tank 1 (15) is fixedly connected to the top of each support block (12), and hot water tank 2 (18) is fixedly connected to the top of each support block (12).

7. A cement kiln heat energy cascade recovery device according to claim 6, characterized in that: The outer wall of the hot water tank (15) is connected to a medium-temperature pipe (16), and the outer wall of the hot water tank (15) is connected to a medium-temperature pipe (17). Both the medium-temperature pipe (16) and the medium-temperature pipe (17) are connected to the water outlet pipe (11).

8. A cement kiln heat energy cascade recovery device according to claim 6, characterized in that: The outer wall of the second hot water tank (18) is connected to a high-temperature pipe (19), and the outer wall of the second hot water tank (18) is connected to a high-temperature pipe (20).

Images