A waste heat recovery steam generator

Abstract

The utility model relates to waste heat recovery technical field discloses a waste heat recovery produces steam device, including solidification furnace, the solidification furnace inner wall fixedly connected with the conveying pipe no.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a waste heat recovery steam generation device. Background Technology

[0002] In the industrial production field, equipment such as curing furnaces and melting furnaces continuously discharge a large amount of high-temperature waste heat during operation. Direct discharge not only wastes energy but also causes thermal pollution to the environment. At the same time, equipment such as annealing furnaces require a stable supply of steam to create an oxygen-free environment during processing to prevent workpiece oxidation. In traditional production models, high-temperature waste heat is mostly discharged after being treated by simple cooling devices, while steam is generated by heating in a separate boiler.

[0003] The mechanical structure of existing waste heat recovery steam generation devices typically consists of a waste heat collection pipeline, a simple tubular heat exchanger, a steam storage tank, and a makeup water tank. The waste heat collection pipeline is made of ordinary carbon steel, with one end connected to the waste heat discharge equipment and the other end connected to the tubular heat exchanger. The tubular heat exchanger contains a single set of straight heat exchange tubes, and the outside of the tubes is a water storage chamber. The water storage chamber is connected to the makeup water tank through a pipeline, and the top of the water storage chamber is connected to the steam storage tank. The steam storage tank is then connected to the downstream steam-using equipment through a pipeline.

[0004] Existing waste heat recovery steam generation devices have room for improvement in terms of waste heat utilization efficiency and heat exchange sufficiency. The heat exchange structure mostly adopts a single set of straight heat exchange tubes, and there is no special structure design to enhance heat transfer outside the tubes. This results in a limited contact area between waste heat and water, with heat only transferred through the surface of the tube wall. A large amount of waste heat is discharged with the exhaust gas without sufficient exchange, leading to a low waste heat recovery utilization rate. The connection between the heat exchange tubes and the water storage chamber is relatively simple, lacking a design to extend the residence time of waste heat in the tubes. The waste heat flows too fast in the tubes, resulting in a short heat exchange time with water, which further reduces the heat exchange effect and makes the generated steam quantity and temperature stability insufficient. Therefore, a waste heat recovery steam generation device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a waste heat recovery steam generation device, which aims to improve the existing waste heat recovery steam generation devices in terms of waste heat utilization efficiency and heat exchange adequacy, where there is still room for optimization.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery steam generation device, comprising a curing furnace, a second conveying pipe fixedly connected to the inner wall of the curing furnace, a water storage tank fixedly connected to the outer wall of the second conveying pipe, a water supply pipe provided inside the water storage tank, a floating water tank provided on the outer wall of the water supply pipe, a first conveying pipe fixedly connected to the inner wall of the water storage tank, an annealing furnace fixedly connected to one end of the first conveying pipe, and a waste heat utilization component provided inside the water storage tank; The waste heat utilization component includes a collecting plate and a heat exchange tube. The collecting plate is installed inside the water storage tank. The inner wall of the collecting plate is fixedly connected to one end of the conveying pipe. The outer wall of the heat exchange tube is fixedly connected to the inner wall of the collecting plate. A spiral tube is fixedly connected to the inner wall of the collecting plate. Multiple heat-conducting plates are fixedly connected to the outer wall of the heat exchange tube.

[0007] Through the above technical solution, a high-temperature waste heat source is provided by the curing furnace, the second conveying pipe realizes the waste heat transfer, the water storage tank serves as the core container for heat exchange and steam generation, the water supply pipe works with the floating water tank to ensure the stability of the water level in the water storage tank, the first conveying pipe connects the water storage tank and the annealing furnace to transport steam, and a waste heat utilization component is set up to lay the structural foundation for subsequent efficient recovery of waste heat and heating to generate steam.

[0008] Preferably, a fixed box is fixedly connected to the outer wall of the water storage tank, a high-temperature resistant cylinder is installed inside the fixed box, a fixed block is fixedly connected to the output end of the high-temperature resistant cylinder, and a gear is rotatably connected to the inner wall of the fixed block.

[0009] The above technical solution provides a mounting carrier for the high-temperature resistant cylinder by setting a fixed box on the outer wall of the water storage tank. The output end of the high-temperature resistant cylinder is connected to the fixed block and the gear, so that the high-temperature resistant cylinder can transmit power to the gear, providing initial power support for the subsequent gear to drive the rack and pinion to work and drive the cleaning components.

[0010] Preferably, a second rack is fixedly connected to the inner wall of the water storage tank, and a first rack is slidably connected to the inner wall of the water storage tank.

[0011] Through the above technical solution, by fixing rack two to the inner wall of the water storage tank and slidingly connecting rack one, rack two and rack one can respectively mesh with gears to form a transmission structure, creating conditions for the transmission and conversion of power in the cleaning mechanism.

[0012] Preferably, the rack two is meshed with the gear, and the gear is meshed with the rack one.

[0013] Through the above technical solution, the meshing connection between rack two, rack one and gear enables the gear to rotate synchronously and drive rack one to slide, realizing the transmission of power from gear to rack one, and providing a power transmission path for the subsequent sliding block to drive the cleaning component to move.

[0014] Preferably, a sliding block is fixedly connected to the outer wall of the rack, and a slide rail is slidably connected to the inner wall of the sliding block.

[0015] Through the above technical solution, by fixing a sliding block to the outer wall of the rack and sliding a slide rail to the inner wall of the sliding block, the sliding block can slide smoothly along the slide rail under the drive of the rack. At the same time, the sliding block can serve as a mounting carrier for cleaning components such as sleeves, ensuring that the cleaning components can move in the direction of the sliding block.

[0016] Preferably, the outer wall of the slide rail is fixedly connected to the inner wall of the water storage tank, and the inner wall of the sliding block is fixedly connected with multiple sleeves.

[0017] The above technical solution ensures that the slide rail provides stable guidance for the sliding block by fixing the slide rail to the inner wall of the water tank. At the same time, multiple sleeves are fixed to the inner wall of the sliding block so that the sleeves can move synchronously with the sliding block, providing structural support for the subsequent installation of springs, connecting blocks and cleaning brushes.

[0018] Preferably, a plurality of springs are fixedly connected to the inner wall of the sleeve, and a connecting block is fixedly connected to one end of each spring.

[0019] The above technical solution involves fixing a spring to the inner wall of the sleeve and connecting a connecting block to one end of the spring. This allows the connecting block to slide inside the sleeve and compress the spring, forming an elastic buffer structure. This lays the foundation for buffering and preventing hard wear when the cleaning brush encounters resistance.

[0020] Preferably, the outer wall of the connecting block is slidably connected to the inner wall of the sleeve, and a plurality of cleaning brushes are fixedly connected to one side of the outer wall of the connecting block, the cleaning brushes being in contact with the heat exchange tube.

[0021] The above technical solution uses a connecting block to slide the sleeve and fix a cleaning brush on one side. The cleaning brush is in contact with the heat exchange tube, allowing the cleaning brush to move with the connecting block, sleeve, and sliding block to remove impurities from the surface of the heat exchange tube. At the same time, the buffering effect of the connecting block's compression spring is used to prevent the cleaning brush from being worn hard or the pipe from being scratched, ensuring both cleaning effect and component protection.

[0022] This utility model has the following beneficial effects: 1. In this utility model, a waste heat recovery and utilization structure composed of a second conveying pipe, a collecting plate, a heat exchange pipe, and a heat-conducting plate is used. The high-temperature waste heat discharged from the curing furnace is transported to the collecting plate via the second conveying pipe and then flows into multiple sets of heat exchange pipes. The heat-conducting plate outside the heat exchange pipes expands the heat transfer area and enhances the heat conduction efficiency. Furthermore, the connection between the heat exchange pipes and the water-adjacent end and the spiral pipe further improves the heat exchange sufficiency, thereby efficiently heating the water in the water storage tank to generate steam. The generated steam is then transported to the annealing furnace via the first conveying pipe. Through the cooperation of this series of structures, the waste heat of the curing furnace is fully recovered for heating to generate steam, creating an oxygen-free environment for copper wire annealing in the annealing furnace and protecting the surface of the copper wire from oxidation. This not only greatly improves the energy utilization rate but also ensures the quality of copper wire annealing.

[0023] 2. In this utility model, a reciprocating cleaning and buffering structure composed of a high-temperature resistant cylinder, a fixed block, gears, and racks is used. When the heat exchange efficiency is affected by scale or other impurities on the surface of the heat exchange tube, the high-temperature resistant cylinder drives the fixed block, causing the gears to move along the racks. This causes the racks to drive the sliding block to slide along the slide rail, and the sleeve drives the cleaning brush to reciprocate along the surface of the heat exchange tube to remove impurities. At the same time, when the cleaning brush encounters local protrusions or scale buildup, the connecting block slides inside the sleeve and squeezes the spring to achieve buffering. This design effectively cleans impurities on the surface of the heat exchange tube, ensures heat exchange efficiency, and avoids wear on the cleaning brush or scratches on the pipe, thus extending the service life of the components. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a waste heat recovery and steam generation device proposed in this utility model; Figure 2 This is a schematic diagram of the floating tank part of a waste heat recovery and steam generation device proposed in this utility model; Figure 3 This is a schematic diagram of the water storage tank part of a waste heat recovery and steam generation device proposed in this utility model; Figure 4 This is a schematic diagram of the rack and pinion structure of a waste heat recovery and steam generation device proposed in this utility model; Figure 5 This is a schematic diagram of the spiral tube section of a waste heat recovery and steam generation device proposed in this utility model; Figure 6 This is a schematic diagram of the sleeve structure of a waste heat recovery and steam generation device proposed in this utility model; Figure 7 This is a schematic diagram of the cleaning brush section of a waste heat recovery steam generation device proposed in this utility model.

[0025] Legend: 1. Curing oven; 2. Water storage tank; 3. Floating water tank; 4. Water supply pipe; 5. Fixing box; 6. Conveying pipe one; 7. Annealing furnace; 8. Conveying pipe two; 9. Collecting plate; 10. Heat exchange pipe; 11. Heat conducting plate; 12. Slide rail; 13. Rack one; 14. High temperature resistant cylinder; 15. Rack two; 16. Fixing block; 17. Gear; 18. Sliding block; 19. Spiral tube; 20. Sleeve; 21. Spring; 22. Connecting block; 23. Cleaning brush. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0027] Reference Figures 1-5An embodiment of this utility model provides a waste heat recovery steam generation device, including a curing furnace 1. A conveying pipe 2 8 is fixedly connected to the inner wall of the curing furnace 1. The conveying pipe 2 8 stably conveys the high-temperature waste heat discharged from the curing furnace 1 to the subsequent heat exchange structure to provide energy for heat exchange. A water storage tank 2 is fixedly connected to the outer wall of the conveying pipe 2 8. A water replenishment pipe 4 is provided inside the water storage tank 2. The water replenishment pipe 4 is the key to realize the automatic water replenishment of the water storage tank 2. The float ball in the component can move synchronously with the rise and fall of the water level in the water storage tank 2. The water replenishment control valve is linked by the connected linkage. When the liquid level drops, the valve is driven to open to replenish water. When the liquid level rises to the set height, the valve is driven to close to maintain the stability of the liquid level in the water storage tank 2. A floating water tank 3 is installed on the outer wall of the water supply pipe 4, and a conveying pipe 6 is fixedly connected to the inner wall of the water storage tank 2. One end of the conveying pipe 6 is fixedly connected to the annealing furnace 7. The conveying pipe 6 is responsible for conveying the steam generated in the water storage tank 2 to the annealing furnace 7, ensuring that the steam can accurately reach the steam-using terminal and meet the oxygen-free environment requirements of the annealing furnace 7. Waste heat utilization components are installed inside the water storage tank 2. The waste heat utilization component includes a collection plate 9 and heat exchange tubes 10. The collection plate 9 is installed inside the water storage tank 2. The inner wall of the collection plate 9 is fixedly connected to one end of the conveying pipe 8. The outer wall of the heat exchange tubes 10 is fixedly connected to the inner wall of the collection plate 9. The collection plate 9 plays the role of collecting and distributing high-temperature waste heat. After receiving the high-temperature waste heat sent by the conveying pipe 8, it evenly distributes it to multiple heat exchange tubes 10. The heat exchange tubes 10 transfer heat to the water in the water storage tank 2 outside the tube through the tube wall, so that the water is heated to generate steam. A spiral tube 19 is fixedly connected to the inner wall of the collecting plate 9. The spiral tube 19 is connected to the end of multiple heat exchange tubes 10 near the water, which can extend the flow path and residence time of high-temperature waste heat in the heat exchange tubes 10, allowing the high-temperature waste heat to have more sufficient heat exchange with the water, improving the waste heat utilization rate and steam generation efficiency. Multiple heat-conducting plates 11 are fixedly connected to the outer wall of the heat exchange tubes 10. The heat-conducting plates 11 expand the contact area between the heat exchange tubes 10 and the water, enhance the heat conduction efficiency from the tube wall to the water, reduce heat loss, and allow the water to absorb heat and convert into steam more quickly. A fixed box 5 is fixedly connected to the outer wall of the water storage tank 2. A high-temperature resistant cylinder 14 is installed inside the fixed box 5. A fixed block 16 is fixedly connected to the output end of the high-temperature resistant cylinder 14. The high-temperature resistant cylinder 14 used in this application is model C76-XB6, which is used to drive the fixed block 16. A gear 17 is rotatably connected to the inner wall of the fixed block 16.

[0028] Specifically, a second conveying pipe 8 is fixedly connected to the inner wall of the curing furnace 1, which can stably transport the high-temperature waste heat discharged from the curing furnace 1 to the subsequent heat exchange structure. A water storage tank 2 is fixedly connected to the outer wall of the second conveying pipe 8. A water replenishment pipe 4 is installed inside the water storage tank 2. The water replenishment pipe 4 is connected to the water replenishment control valve through a float ball that moves up and down with the liquid level, so as to realize the automatic water replenishment of the water storage tank 2 and maintain the stable liquid level. A floating water tank 3 is fitted on the outer wall of the water replenishment pipe 4 to provide water for water replenishment. A first conveying pipe 6 is also fixedly connected to the inner wall of the water storage tank 2. One end of the first conveying pipe 6 is fixedly connected to the annealing furnace 7, which can transport the steam generated in the water storage tank 2 to the annealing furnace 7 to meet its oxygen-free environment requirements. The water storage tank 2 is equipped with a waste heat utilization component, which includes a collecting plate 9 and a heat exchange tube 10. The collecting plate 9 is located inside the water storage tank 2 and its inner wall is fixedly connected to one end of the second conveying pipe 8. The outer wall of the heat exchange tube 10 is fixedly connected to the inner wall of the collecting plate 9. The collecting plate 9 can evenly distribute the waste heat sent by the second conveying pipe 8 to the heat exchange tube 10. The heat exchange tube 10 transfers heat to the water in the water storage tank 2 through the tube wall to generate steam. The inner wall of the collecting plate 9 is also fixedly connected to a spiral tube 19. The spiral tube 19 is connected to the end of multiple heat exchange tubes 10 near the water, which can extend the flow path and residence time of waste heat in the heat exchange tubes 10 and improve the heat exchange efficiency. Multiple heat-conducting plates 11 fixedly connected to the outer wall of the heat exchange tube 10 can expand the heat transfer area and enhance the heat conduction efficiency. A fixed box 5 is fixedly connected to the outer wall of the water storage tank 2. A high-temperature resistant cylinder 14 of model C76-XB6 is installed inside the fixed box 5. A fixed block 16 is fixedly connected to the output end of the high-temperature resistant cylinder 14. A gear 17 is rotatably connected to the inner wall of the fixed block 16 to provide a power base for the subsequent cleaning mechanism.

[0029] Reference Figures 4-7 A rack 15 is fixedly connected to the inner wall of the water storage tank 2, and a rack 13 is slidably connected to the inner wall of the water storage tank 2. The rack 15 meshes with the gear 17, and the gear 17 meshes with the rack 13. The rack 15 is fixed inside the fixed box 5 and meshes with the gear 17 to provide meshing support for the rotation of the gear 17. When the high-temperature resistant cylinder 14 drives the fixed block 16 to move, the gear 17 rolls along the rack 15 to realize the conversion and transmission of power direction. A sliding block 18 is fixedly connected to the outer wall of the rack 13, and a slide rail 12 is slidably connected to the inner wall of the sliding block 18. The slide rail 12 is installed on both sides of the inner wall of the water storage tank 2 to provide a guide rail for the movement of the sliding block 18, limit the movement direction of the sliding block 18, and ensure that the sliding block 18 moves smoothly along the fixed path. The outer wall of the slide rail 12 is fixedly connected to the inner wall of the water storage tank 2. Multiple sleeves 20 are fixedly connected to the inner wall of the sliding block 18. Multiple springs 21 are fixedly connected to the inner wall of the sleeves 20. A connecting block 22 is fixedly connected to one end of the spring 21. The outer wall of the connecting block 22 is slidably connected to the inner wall of the sleeve 20. Multiple cleaning brushes 23 are fixedly connected to one side of the outer wall of the connecting block 22. When the cleaning brush 23 encounters a protrusion or scale buildup on the surface of the heat exchange tube 10, the connecting block 22 squeezes the spring 21 to cause it to deform slightly, which plays a buffering role and prevents the cleaning brush 23 from being worn or the pipe from being scratched. At the same time, it maintains a uniform cleaning pressure. The cleaning brush 23 fits against the heat exchange tube 10. The sliding block 18 slides along the slide rail 12 under the drive of the rack 13, providing motion support for the sleeves 20 and the cleaning brushes 23, ensuring that the cleaning brushes 23 can perform reciprocating cleaning motion along the surface of the heat exchange tube 10.

[0030] Specifically, a rack 15 is fixedly connected to the inner wall of the water tank 2, and a rack 13 is slidably connected to the inner wall of the water tank 2. Both rack 15 and rack 13 mesh with gear 17. Rack 15 provides meshing support for the rotation of gear 17. When the high-temperature resistant cylinder 14 drives the fixed block 16 to move, gear 17 rolls along rack 15 to realize the conversion and transmission of power direction. A sliding block 18 is fixedly connected to the outer wall of rack 13. A slide rail 12 is slidably connected to the inner wall of sliding block 18. The outer wall of slide rail 12 is fixedly connected to both sides of the inner wall of water tank 2, which can provide a guide track for sliding block 18 and limit its movement direction to ensure smooth sliding. Multiple sleeves 20 are fixedly connected to the inner wall of the sliding block 18. Multiple springs 21 are fixedly connected to the inner wall of the sleeves 20. A connecting block 22 is fixedly connected to one end of the spring 21. The outer wall of the connecting block 22 is slidably connected to the inner wall of the sleeve 20. Multiple cleaning brushes 23 that fit against the heat exchange tube 10 are fixedly connected to one side of the outer wall of the connecting block 22. When the sliding block 18 slides along the slide rail 12 under the drive of the rack 13, it will drive the cleaning brushes 23 to reciprocate along the surface of the heat exchange tube 10 to remove impurities. If the cleaning brushes 23 encounter protrusions or scale buildup on the surface of the heat exchange tube 10, the connecting block 22 will slide inside the sleeve 20 and squeeze the springs 21. The slight deformation of the springs 21 will play a buffering role to prevent the cleaning brushes 23 from being worn hard or the pipe from being scratched, while maintaining uniform cleaning pressure.

[0031] Working principle: When it is necessary to recover and utilize the high-temperature waste heat discharged from the curing furnace 1, the high-temperature waste heat is transported to the collection plate 9 through the second conveying pipe 8, and then flows into multiple heat exchange pipes 10 to carry out heat exchange. The ends of the multiple heat exchange pipes 10 that are close to the water are connected to the spiral pipe 19 to improve the fullness of heat exchange. The heat-conducting plate 11 outside the heat exchange pipe 10 can expand the heat transfer area and enhance the heat conduction efficiency, thereby heating the water in the water storage tank 2 to generate steam. The generated steam is transported to the annealing furnace 7 through the first conveying pipe 6, so that the copper wire in the annealing furnace 7 is isolated from oxygen during the annealing process, protecting the surface of the copper wire from oxidation. When the water level in the water storage tank 2 drops, the float in the water replenishment pipe 4 will descend along with the water level under the combined action of its own weight and buoyancy. As the float descends, the connecting rod connected to it will rotate or move, thereby driving the water replenishment control valve to open, allowing water in the float tank 3 to flow into the water storage tank 2 through the pipe. As water replenishment continues, the water level in the water storage tank 2 gradually rises, and the float also rises. When the water level reaches the preset stop water replenishment level, the position change of the float is fed back to the water replenishment control valve through the connecting rod, causing the valve to close, thus realizing automatic water replenishment. If the heat exchange efficiency is affected by scale or other impurities on the surface of the heat exchange tube 10, the high-temperature resistant cylinder 14 inside the fixed box 5 will drive the fixed block 16, causing the gear 17 to move along the upper rack 15. The lower rack 13 will then drive the sliding block 18 to slide along the slide rails 12 on both sides of the inner wall of the water storage tank 2, allowing the multiple sleeves 20 inside the sliding block 18 to reciprocate along the surface of the heat exchange tube 10. The cleaning brush 23 will remove scale and other impurities from the surface of the heat exchange tube 10. When the cleaning brush 23 touches a local protrusion or scale buildup on the surface of the heat exchange tube 10, the connecting block 22 will slide inside the sleeve 20 and squeeze the spring 21, causing the spring 21 to deform slightly, thus preventing the cleaning brush 23 from being worn hard or the pipe from being scratched, while ensuring uniform cleaning pressure.

Claims

1. A waste heat recovery steam generation device, comprising a curing furnace (1), characterized in that: The curing furnace (1) is fixedly connected to the inner wall of the conveying pipe two (8), and the outer wall of the conveying pipe two (8) is fixedly connected to the water storage tank (2). The water storage tank (2) is provided with a water supply pipe (4), and the outer wall of the water supply pipe (4) is provided with a floating water tank (3). The inner wall of the water storage tank (2) is fixedly connected to the conveying pipe one (6), and one end of the conveying pipe one (6) is fixedly connected to the annealing furnace (7). The water storage tank (2) is provided with a waste heat utilization component. The waste heat utilization component includes a collection plate (9) and a heat exchange tube (10). The collection plate (9) is located inside the water storage tank (2). The inner wall of the collection plate (9) is fixedly connected to one end of the second conveying pipe (8). The outer wall of the heat exchange tube (10) is fixedly connected to the inner wall of the collection plate (9). A spiral tube (19) is fixedly connected to the inner wall of the collection plate (9). A plurality of heat-conducting plates (11) are fixedly connected to the outer wall of the heat exchange tube (10).

2. The waste heat recovery steam generation device according to claim 1, characterized in that: The water storage tank (2) is fixedly connected to a fixed box (5) on its outer wall. A high-temperature resistant cylinder (14) is installed inside the fixed box (5). A fixed block (16) is fixedly connected to the output end of the high-temperature resistant cylinder (14). A gear (17) is rotatably connected to the inner wall of the fixed block (16).

3. The waste heat recovery steam generation device according to claim 2, characterized in that: The inner wall of the water storage tank (2) is fixedly connected to a rack two (15), and the inner wall of the water storage tank (2) is slidably connected to a rack one (13).

4. The waste heat recovery steam generation device according to claim 3, characterized in that: The second rack (15) is meshed with the gear (17), and the gear (17) is meshed with the first rack (13).

5. A waste heat recovery steam generation device according to claim 4, characterized in that: A sliding block (18) is fixedly connected to the outer wall of the rack (13), and a slide rail (12) is slidably connected to the inner wall of the sliding block (18).

6. The waste heat recovery steam generation device according to claim 5, characterized in that: The outer wall of the slide rail (12) is fixedly connected to the inner wall of the water storage tank (2), and the inner wall of the sliding block (18) is fixedly connected to multiple sleeves (20).

7. A waste heat recovery steam generation device according to claim 6, characterized in that: Multiple springs (21) are fixedly connected to the inner wall of the sleeve (20), and a connecting block (22) is fixedly connected to one end of each spring (21).

8. A waste heat recovery steam generation device according to claim 7, characterized in that: The outer wall of the connecting block (22) is slidably connected to the inner wall of the sleeve (20), and a plurality of cleaning brushes (23) are fixedly connected to one side of the outer wall of the connecting block (22), and the cleaning brushes (23) are in contact with the heat exchange tube (10).

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