Energy-saving and carbon-reducing flue gas waste heat recovery device

Abstract

The utility model discloses an energy-saving and carbon-reducing flue gas waste heat recovery device, and particularly relates to the technical field of waste heat recovery, the energy-saving and carbon-reducing flue gas waste heat recovery device comprises a connecting pipe arranged in a heat preservation tank, the two ends of the connecting pipe are fixedly communicated with heat exchange pipes, and the ends, away from the connecting pipe, of the heat exchange pipes are movably connected with the inner wall of the heat preservation tank through bearings; a driving piece for driving the heat exchange pipe to rotate is arranged outside the connecting pipe; and the driving piece comprises a main shaft arranged at the top of the connecting pipe. The servo motor drives the driving bevel gear on the main shaft to rotate, the driving bevel gear drives the connecting pipe and the heat exchange pipe to rotate through the meshed driven bevel gears, the heat exchange pipe stirs liquid to improve the contact efficiency, the rotating heat exchange pipe can transfer heat to all parts of the liquid more quickly, the local overheating or supercooling phenomenon is avoided, and the heat exchange efficiency is improved. Meanwhile, shearing force can be generated through rotation of the heat exchange tubes, impurities and suspended solids in the liquid are prevented from being adhered, the surfaces of the heat exchange tubes are kept clean, and therefore the heat exchange performance of the heat exchange tubes is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and more specifically to an energy-saving and carbon-reducing flue gas waste heat recovery device. Background Technology

[0002] With societal development, energy consumption is increasing daily, making efficient energy utilization and environmental protection crucial issues. Flue gas waste heat recovery, a key technology for energy conservation and carbon reduction, is receiving increasing attention. Flue gas waste heat primarily originates from waste gas emissions in various industrial production processes, such as metallurgy, cement, power generation, chemicals, and machinery manufacturing. These flue gases carry significant amounts of heat during production, characterized by high temperature, large flow rate, high dust content, and varying levels of corrosive substances. The recovery and utilization of flue gas waste heat is mainly achieved through heat exchangers, transferring heat from the flue gas to a working medium (such as water or air), thus realizing the recovery and utilization of thermal energy. By recovering flue gas waste heat, it can be converted into useful thermal or electrical energy, reducing dependence on external energy sources and lowering energy consumption costs.

[0003] As shown in the prior art published in CN222165776U, although the prior art can filter flue gas through a tubular filter to prevent dust in the flue gas from condensing on the inner wall of the heat exchange tube and affecting waste heat recovery, and can adsorb harmful gases such as carbon dioxide in the flue gas through a plate-shaped activated carbon adsorption mesh, the liquid flow rate in the prior art is relatively slow, resulting in low contact efficiency between the liquid and the heat exchange tube, which in turn affects the heat exchange efficiency between the heat exchange tube and the liquid. Utility Model Content

[0004] To overcome the aforementioned deficiencies in the prior art, this utility model provides an energy-saving and carbon-reducing flue gas waste heat recovery device. A servo motor drives a main bevel gear on the main shaft to rotate. The main bevel gear, through a meshing driven bevel gear, drives the connecting pipe and heat exchange tube to rotate. The heat exchange tube agitates the liquid, improving contact efficiency. Furthermore, the rotating heat exchange tube can transfer heat more quickly to all parts of the liquid, avoiding localized overheating or overcooling. Simultaneously, the rotation of the heat exchange tube generates shear force, preventing impurities and suspended matter in the liquid from adhering, keeping the surface of the heat exchange tube clean, thereby ensuring the heat exchange performance of the heat exchange tube and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving and carbon-reducing flue gas waste heat recovery device, including a connecting pipe installed inside an insulation tank, both ends of which are fixedly connected to heat exchange pipes, and the end of the heat exchange pipe furthest from the connecting pipe is movably connected to the inner wall of the insulation tank through a bearing.

[0006] The connecting pipe is equipped with a drive component that drives the heat exchange tube to rotate.

[0007] The driving component includes a main shaft located at the top of the connecting pipe, a main bevel gear mounted at the bottom end of the main shaft, and a driven bevel gear meshing on one side of the bottom end of the main bevel gear, the driven bevel gear being sleeved on the outside of the connecting pipe.

[0008] In a preferred embodiment, the heat preservation tank is equipped with a fixing frame on both sides, and an inlet chimney and an outlet chimney are respectively installed on the top of the two fixing frames. A smoke supply pipe is fixedly connected to the side of the inlet chimney away from the outlet chimney, and an exhaust pipe is fixedly connected to the top of the outlet chimney.

[0009] Two heat exchange tubes are respectively fitted with an inlet pipe and an outlet pipe connected by bearings at their far ends. The front end of the inlet pipe is fixedly connected to the bottom of the inlet cylinder, and the top of the rear end of the outlet pipe is fixedly connected to the end of the outlet cylinder that is far from the inlet cylinder.

[0010] In a preferred embodiment, the outer sides of the inlet and outlet chimneys that are close to each other are threaded with mounting rings, and the mounting rings are fitted with movable plates that are movably connected by bearings. Filter rings and annular activated carbon meshes are respectively installed on the sides of the two movable plates that are far apart.

[0011] The filter ring is located inside the flue gas inlet and is fitted outside the flue gas delivery pipe. The annular activated carbon mesh is located inside the flue gas outlet and is fitted outside the flue gas outlet pipe.

[0012] In a preferred embodiment, slots are provided on the side of the two movable plates that are close to each other. A locking block is provided inside the slot. A telescopic rod is installed on the side of the locking block away from the movable plate. A spring is sleeved on the outside of the end of the telescopic rod that is close to the locking block. A driven helical gear is installed on the end of the telescopic rod that is away from the locking block. The same master helical gear meshes between the two driven helical gears.

[0013] In a preferred embodiment, the top of the main helical gear is provided with a mounting bracket, and the bottom of both ends of the mounting bracket are fixed to the top of the insulation tank. The top of the main shaft penetrates the insulation tank and extends into the interior of the mounting bracket, and the top of the main shaft is movably connected to the bottom of the mounting bracket through a bearing. The main helical gear is sleeved on the outside of the main shaft.

[0014] A servo motor is mounted on the top of the mounting bracket, and the output shaft of the servo motor passes through the mounting bracket and is fixed to the top of the main shaft.

[0015] In a preferred embodiment, the top of the insulated tank is fixedly connected to an inlet pipe, and one side of the bottom of the insulated tank is fixedly connected to an outlet pipe.

[0016] In a preferred embodiment, the telescopic rod is fitted with a positioning seat that is movably connected to the helical gear near one end, and the bottom end of the positioning seat is fixed to the top of the insulated tank.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. The main bevel gear on the spindle is driven to rotate by the servo motor. The main bevel gear drives the connecting tube and heat exchange tube to rotate through the meshing bevel gear. The heat exchange tube agitates the liquid to improve the contact efficiency. The rotating heat exchange tube can transfer heat to all parts of the liquid more quickly, avoiding local overheating or overcooling. This makes the temperature of the liquid in the heat preservation tank more uniform. At the same time, the rotation of the heat exchange tube can generate shear force, preventing impurities and suspended matter in the liquid from adhering and keeping the surface of the heat exchange tube clean, thereby ensuring the heat exchange performance of the heat exchange tube.

[0019] 2. The spring tension pushes the locking block into the slot, and then the main shaft drives the main helical gear to rotate. The main helical gear drives the locking block on the telescopic rod to rotate through the meshing helical gear. The locking block then drives the filter ring and annular activated carbon mesh on the movable plate to rotate, thereby throwing away impurities and avoiding blockage, ensuring the filtration performance of the filter ring and annular activated carbon mesh.

[0020] 3. By utilizing the telescopic properties of the telescopic rod and spring, the spring and telescopic rod can be moved inward to separate the locking block from the movable plate. Then, the mounting ring can be rotated to separate from the inlet or outlet of the flue, making it easier to remove the filter ring and annular activated carbon mesh for inspection and maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a cross-sectional view of the insulated tank of this utility model;

[0023] Figure 3 For the present utility model Figure 2 Enlarged view of section A in the middle;

[0024] Figure 4 For the present utility model Figure 2 Enlarged view of section B;

[0025] Figure 5 This is a cross-sectional view of the flue of this utility model.

[0026] The attached diagram is labeled as follows: 1. Insulation tank; 2. Connecting pipe; 3. Heat exchange pipe; 4. Main shaft; 5. Main bevel gear; 6. Driven bevel gear; 7. Fixing frame; 8. Inlet flue; 9. Outlet flue; 10. Flue supply pipe; 11. Exhaust pipe; 12. Inlet flue; 13. Outlet flue; 14. Mounting ring; 15. Movable plate; 16. Filter ring; 17. Annular activated carbon mesh; 18. Slot; 19. Locking block; 20. Telescopic rod; 21. Spring; 22. Driven helical gear; 23. Main helical gear; 24. Mounting bracket; 25. Servo motor; 26. Liquid inlet pipe; 27. Liquid outlet pipe; 28. Positioning seat. Detailed Implementation

[0027] 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.

[0028] Refer to the attached diagram in the instruction manual. Figures 1-5 This utility model provides an energy-saving and carbon-reducing flue gas waste heat recovery device, including a connecting pipe 2 installed inside an insulated tank 1. Both ends of the connecting pipe 2 are fixedly connected to heat exchange pipes 3. The end of the heat exchange pipe 3 away from the connecting pipe 2 is movably connected to the inner wall of the insulated tank 1 through a bearing. A driving component for driving the heat exchange pipe 3 to rotate is provided outside the connecting pipe 2. The driving component includes a main shaft 4 installed at the top of the connecting pipe 2. A main bevel gear 5 is installed at the bottom end of the main shaft 4, and a driven bevel gear 6 meshes with one side of the bottom end of the main bevel gear 5. The driven bevel gear 6 is sleeved on the outside of the connecting pipe 2.

[0029] In use, the main helical gear 23 is equipped with a mounting bracket 24 at its top, and the bottom of both ends of the mounting bracket 24 are fixed to the top of the insulation tank 1. The top of the main shaft 4 penetrates the insulation tank 1 and extends into the mounting bracket 24, and the top of the main shaft 4 is movably connected to the bottom of the mounting bracket 24 via a bearing. The main helical gear 23 is sleeved on the outside of the main shaft 4. A servo motor 25 is mounted on the top of the mounting bracket 24, and the output shaft of the servo motor 25 penetrates the mounting bracket 24 and is fixed to the top of the main shaft 4, allowing the operator to start the servo motor 25 to drive the main bevel gear 5 on the main shaft 4 to rotate. The main bevel gear 5 rotates by meshing... The bevel gear 6 drives the connecting pipe 2 to rotate. Since the end of the heat exchange tube 3 away from the connecting pipe 2 is movably connected to the heat insulation tank 1 through a bearing, the connecting pipe 2 can drive the heat exchange tube 3 to stir the liquid flow, thereby improving the contact efficiency between the liquid and the heat exchange tube 3. The rotating heat exchange tube 3 can transfer heat to all parts of the liquid more quickly, thereby avoiding uneven heating and local overheating or undercooling, making the temperature of the liquid in the heat insulation tank 1 more uniform. At the same time, the rotation of the heat exchange tube 3 can generate shear force, preventing impurities and suspended matter in the liquid from adhering, thereby keeping the surface of the heat exchange tube 3 clean and ensuring the heat exchange performance of the heat exchange tube 3.

[0030] When heat exchange is performed using the aforementioned heat exchange tube 3, the heat exchange tube 3 needs to absorb the waste heat from the flue gas, such as... Figure 1 , Figure 2 and Figure 5As shown, the heat preservation tank 1 is equipped with a fixing frame 7 on both sides. The top of the two fixing frames 7 are respectively equipped with a flue 8 and a flue 9. The side of the flue 8 away from the flue 9 is fixedly connected to a flue pipe 10, and the top of the flue 9 is fixedly connected to a flue pipe 11. The two heat exchange tubes 3 are respectively fitted with a flue pipe 12 and a flue pipe 13 connected by bearings on their outer sides. The front end of the flue pipe 12 is fixedly connected to the bottom of the flue 8, and the rear end of the flue pipe 13 is fixedly connected to the top of the flue 9 away from the flue 8. The high-temperature flue gas is transported to the inside of the flue 8 through the flue pipe 10.

[0031] In this system, mounting rings 14 are threadedly connected to the outer ends of the inlet smoke duct 8 and the outlet smoke duct 9, respectively. Inside each mounting ring 14, a movable plate 15 is movably connected via a bearing. A filter ring 16 and an annular activated carbon mesh 17 are respectively installed on the opposite sides of the two movable plates 15. The filter ring 16 is located inside the inlet smoke duct 8 and is fitted over the outside of the flue gas supply pipe 10. The annular activated carbon mesh 17 is located inside the outlet smoke duct 9 and is fitted over the outside of the outlet smoke pipe 13. Thus, the filter ring 16 filters impurities in the high-temperature flue gas, preventing impurities from entering the flue gas. The heat exchange performance of the heat exchange tube 3 is affected by the internal structure of the heat exchange tube 3. The filtered high-temperature flue gas is transported to the inside of the heat exchange tube 3 through the flue gas inlet pipe 12. The top of the insulation tank 1 is fixedly connected to the liquid inlet pipe 26, and the bottom side of the insulation tank 1 is fixedly connected to the liquid outlet pipe 27. This allows the staff to transport liquid into the inside of the insulation tank 1 to contact the heat exchange tube 3, thereby realizing the utilization of the waste heat of the flue gas. The flue gas after heat exchange is then transported to the inside of the flue gas outlet 9 through the flue gas outlet pipe 13, and impurities such as carbon dioxide are adsorbed and filtered by the annular activated carbon mesh 17. The filtered flue gas is then discharged through the flue gas outlet pipe 11.

[0032] Meanwhile, to ensure the filtration performance of the filter ring 16 and the annular activated carbon mesh 17 in the above structure, it is necessary to avoid clogging of the filter ring 16 and the annular activated carbon mesh 17, such as... Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, each of the two movable plates 15 has a slot 18 on the side closest to each other. The slot 18 has a locking block 19 inside. A telescopic rod 20 is installed on the side of the locking block 19 away from the movable plate 15. A spring 21 is sleeved on the outside of the end of the telescopic rod 20 near the locking block 19. A driven helical gear 22 is installed on the end of the telescopic rod 20 away from the locking block 19. The same main helical gear 23 meshes between the two driven helical gears 22. The tension of the spring 21 pushes the locking block 19 into the slot 18, so that the telescopic rod 20 and the movable plate 15 can be connected as one unit. Thus, when the main shaft 4 drives the main helical gear 23 to rotate, the main helical gear 23 can drive the locking block 19 on the telescopic rod 20 to rotate through the meshing driven helical gear 22. The locking block 19 then drives the filter ring 16 and the annular activated carbon mesh 17 on the movable plate 15 to rotate, so as to throw away impurities and avoid clogging, thereby ensuring the filtration performance of the filter ring 16 and the annular activated carbon mesh 17.

[0033] Furthermore, thanks to the telescopic properties of the telescopic rod 20 and the spring 21, the operator can pull the spring 21 and the telescopic rod 20 inward to separate the locking block 19 from the movable plate 15, and then rotate the mounting ring 14 to separate it from the inlet chimney 8 or the outlet chimney 9, thereby facilitating the removal of the filter ring 16 and the annular activated carbon mesh 17 for inspection and maintenance.

[0034] To ensure the operational stability of the telescopic rod 20, it is necessary to provide support and limit the telescopic rod 20, such as... Figure 1 , Figure 2 and Figure 5 As shown, a positioning seat 28 is sleeved on the outside of the telescopic rod 20 near one end of the helical gear 22 and is movably connected by a bearing. The bottom end of the positioning seat 28 is fixed to the top of the heat preservation tank 1. The positioning seat 28 supports and limits the telescopic rod 20, thereby ensuring the operational stability of the telescopic rod 20 and preventing the telescopic rod 20 from tilting or swaying.

[0035] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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. An energy-saving and carbon-reducing flue gas waste heat recovery device, characterized in that: The utility model provides a heat preservation tank, which comprises a connecting pipe (2) arranged in the heat preservation tank (1), heat exchange pipes (3) fixedly connected to both ends of the connecting pipe (2), and bearings arranged between the heat exchange pipes (3) and the inner wall of the heat preservation tank (1). The connecting pipe (2) is externally provided with a driving member for driving the heat exchange pipes (3) to rotate. The driving member comprises a main shaft (4) arranged at the top of the connecting pipe (2), a main bevel gear (5) arranged at the bottom end of the main shaft (4), and a slave bevel gear (6) arranged at the bottom end of the main bevel gear (5) and meshing with the main bevel gear (5).

2. The energy-saving and carbon-reducing flue gas waste heat recovery device according to claim 1, characterized in that: The heat preservation tank (1) is provided with a fixed frame (7) on each side, an inlet smoke pipe (8) and an outlet smoke pipe (9) are arranged at the top of the two fixed frames (7), respectively, a smoke delivery pipe (10) is fixedly connected to the side of the inlet smoke pipe (8) away from the outlet smoke pipe (9), and a smoke exhaust pipe (11) is fixedly connected to the top of the outlet smoke pipe (9). The outer sides of the ends of the two heat exchange pipes (3) away from each other are respectively sleeved with an inlet smoke pipe (12) and an outlet smoke pipe (13) which are movably connected through bearings, the front end of the inlet smoke pipe (12) is fixedly connected to the bottom of the inlet smoke pipe (8), and the top of the rear end of the outlet smoke pipe (13) is fixedly connected to the end of the outlet smoke pipe (9) away from the inlet smoke pipe (8).

3. The energy-saving and carbon-reducing flue gas waste heat recovery device according to claim 2, characterized in that: The outer sides of the ends of the inlet smoke pipe (8) and the outlet smoke pipe (9) close to each other are respectively threadedly connected with mounting rings (14), and the mounting rings (14) are internally provided with movable plates (15) movably connected through bearings, and the sides of the two movable plates (15) away from each other are respectively provided with filter rings (16) and annular activated carbon nets (17). The filter rings (16) are arranged in the inlet smoke pipe (8) and sleeved on the smoke delivery pipe (10), and the annular activated carbon nets (17) are arranged in the outlet smoke pipe (9) and sleeved on the outlet smoke pipe (13).

4. The energy-saving and carbon-reducing flue gas waste heat recovery device according to claim 3, characterized in that: The sides of the two movable plates (15) close to each other are respectively provided with clamping grooves (18), the clamping grooves (18) are internally provided with clamping blocks (19), the sides of the clamping blocks (19) away from the movable plates (15) are respectively provided with telescopic rods (20), the outer sides of the ends of the telescopic rods (20) close to the clamping blocks (19) are sleeved with springs (21), the ends of the telescopic rods (20) away from the clamping blocks (19) are provided with slave bevel gears (22), and the same main bevel gear (23) is arranged between the two slave bevel gears (22).

5. The energy saving and carbon reducing flue gas waste heat recovery device according to claim 4, characterized in that: The top of the main bevel gear (23) is provided with a mounting bracket (24), the top of the main shaft (4) penetrates through the heat preservation tank (1) and extends into the mounting bracket (24), the top of the main shaft (4) is movably connected to the bottom of the mounting bracket (24) through a bearing, and the main bevel gear (23) is sleeved on the main shaft (4). A servo motor (25) is arranged at the top of the mounting bracket (24), and the output shaft of the servo motor (25) penetrates through the mounting bracket (24) and is fixed to the top of the main shaft (4).

6. The energy saving and carbon reducing flue gas waste heat recovery device according to claim 1, characterized in that: The heat preservation tank (1) top is fixedly connected with a liquid inlet pipe (26), and the heat preservation tank (1) bottom side is fixedly connected with a liquid outlet pipe (27).

7. The energy saving and carbon reducing flue gas waste heat recovery device according to claim 4, characterized in that: The telescopic rod (20) is externally sleeved with a positioning seat (28) movably connected through a bearing at one end close to the bevel gear (22), and the positioning seat (28) bottom is fixedly connected with the heat preservation tank (1) top.

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