A glass annealing lehr waste heat recycling device

Abstract

The utility model relates to glass annealing lehr technical field, concretely is a kind of glass annealing lehr waste heat recycling device, it mainly includes: annealing lehr body, waste heat leading-out pipeline, drying conveyer belt, air volume adjusting component and guiding component.The glass annealing lehr waste heat recycling device of the application is directly guided to the drying conveyer belt at hot air outlet top by setting waste heat leading-out pipeline in annealing lehr body top, the high-temperature hot air with a large amount of waste heat after annealing is directly guided to the drying conveyer belt at hot air outlet top, the waste glass to be dried on conveyer belt is heated and dried, without additional configuration independent drying heat source, the waste heat of annealing lehr external discharge is fully recycled, both avoid heat energy waste and thermal pollution, and reduce the energy cost of waste glass drying link.

Description

Technical Field

[0001] This utility model relates to the field of glass annealing furnace technology, specifically to a device for recycling waste heat from glass annealing furnaces. Background Technology

[0002] In the glass production process, the annealing furnace is a key piece of equipment for stress relief after glass forming. The heat inside the annealing furnace is generated by gas combustion or electric heating. After the annealing process of the glass products is completed, the high-temperature hot air (usually 250°C~450°C) inside the annealing furnace is directly discharged into the atmosphere. In the downstream stage of glass production, waste glass, as one of the important raw materials for glass melting, needs to be dried before being put into the furnace to remove the surface moisture and dust impurities, improve melting efficiency and reduce furnace energy consumption.

[0003] Currently, in the glass manufacturing industry, the conventional practice in existing technologies is to directly discharge the high-temperature hot air after the annealing process into the atmosphere through the exhaust pipe without any form of recycling or reuse. The exhaust pipe of the annealing furnace is usually only equipped with butterfly valves or gates for regulating the pressure inside the furnace. The hot air flows in a unidirectional straight direction and is equipped with an independent drying furnace, which generates hot flue gas by burning natural gas or biomass pellet fuel to heat and dry the waste glass.

[0004] However, the high-temperature hot air discharged from the annealing furnace contains a large amount of unused waste heat resources. Directly releasing it into the atmosphere not only causes a huge waste of heat energy, but also creates local thermal pollution. This is incompatible with the current industry development requirements of energy conservation, emission reduction and green production. Waste glass drying furnaces rely on natural gas or biomass pellets as heating energy. However, natural gas is a non-renewable resource and its market price fluctuates greatly. The storage and transportation costs of biomass pellets are high, which keeps the energy cost of waste glass drying at a high level for a long time, increasing the overall cost of glass production. Utility Model Content

[0005] The purpose of this invention is to provide a device for recycling waste heat from glass annealing furnaces, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A device for recycling waste heat from a glass annealing furnace includes: Annealing kiln body; Waste heat extraction pipes are located at the top of the annealing furnace body, with hot air outlets at the ends furthest from the annealing furnace body. The drying conveyor belt is positioned above the hot air outlet; The air volume regulating component is installed on the waste heat extraction duct and is used to regulate the air volume at the hot air outlet. A guide component, located at the bottom of the drying conveyor belt, is used to guide the hot air blown out of the hot air outlet.

[0007] Preferably, the air volume regulating component includes a fixed frame, which is fixed inside the waste heat outlet pipe. A drive shaft is rotatably mounted on the fixed frame, and a drive impeller is mounted on the end of the drive shaft near the annealing kiln body. A valve plate is mounted inside the waste heat outlet pipe. It also includes a transmission component and an opening component. The opening component is used to adjust the opening of the valve plate. One end of the transmission component is connected to the drive shaft, and the other end is connected to the opening component. The transmission component is used to drive the opening component.

[0008] Preferably, the opening element includes a valve stem, which is rotatably mounted on the waste heat outlet pipe, and the bottom end of the valve stem is connected to the valve plate, with a manual adjustment handle provided at the top of the valve stem.

[0009] Preferably, the outer wall of the waste heat outlet pipe is provided with a limit block baffle. There are two sets of limit block baffles, which are engaged with the waste heat outlet pipe. A limit block is provided at the corresponding position of the limit block baffle on the valve stem. A torsion spring is sleeved on the valve stem. One end of the torsion spring is connected to the limit block, and the other end is connected to the waste heat outlet pipe, which is used to drive the limit block to rotate toward the limit block baffle.

[0010] Preferably, the transmission component includes a first rotating shaft, which is rotatably mounted on the waste heat extraction pipe. A second bevel gear is provided at the bottom of the first rotating shaft, and a first bevel gear is provided at the position of the second bevel gear on the drive shaft. The first bevel gear and the second bevel gear are meshed together.

[0011] Preferably, a first synchronous pulley is provided at the top of the first rotating shaft, a second synchronous pulley is provided on the valve stem, and a synchronous belt is sleeved on the outer side of the first synchronous pulley and the second synchronous pulley.

[0012] Preferably, the guiding component includes a hot air baffle, which is disposed at the bottom of the drying conveyor belt and located on both sides of the hot air outlet. A second rotating shaft is rotatably disposed on the hot air baffle, and an adjusting baffle is sleeved on the second rotating shaft. It also includes an adjustment component, which is installed on the hot air baffle to adjust the angle of the baffle.

[0013] Preferably, the adjusting component includes a guide groove, which is formed on the hot air baffle. A guide rod is provided at the position of the adjusting baffle corresponding to the guide groove, and the guide rod is slidably disposed in the guide groove.

[0014] Preferably, the adjusting component also includes a handle, which is fixed on the guide rod. A movable handle is slidably disposed on the guide rod. The movable handle is located between the hot air baffle and the handle. A return spring is connected between the movable handle and the handle to push the movable handle toward the hot air baffle.

[0015] Preferably, the hot air baffle has multiple sets of limiting holes, and the movable handle is provided with a limiting rod at the corresponding limiting hole position.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model sets up a waste heat extraction pipe at the top of the annealing kiln body to directly guide the high-temperature hot air with a large amount of waste heat after annealing to the drying conveyor belt located above the hot air outlet, so as to heat and dry the waste glass to be dried on the conveyor belt. There is no need to configure an additional independent drying heat source, which fully recovers and utilizes the waste heat discharged from the annealing kiln, avoids heat energy waste and heat pollution, and reduces the energy cost of the waste glass drying process. 2. This utility model can flexibly adjust the air volume of the hot air outlet according to the actual needs of waste glass drying through the air volume adjustment component, thereby adjusting the drying temperature and adapting to waste glass drying operations with different moisture contents; the guide component can change the flow direction of the hot air, so that the hot air can pass through the drying conveyor belt more evenly, ensuring that the waste glass is heated evenly and improving the drying effect. 3. This utility model can automatically adjust the valve plate opening under the drive of the waste heat airflow through the air volume adjustment component. When the waste heat air volume in the annealing furnace increases, the airflow drives the impeller to rotate, and drives the opening component to move through the transmission component, automatically increasing the valve plate opening and increasing the air volume to match the heat generation changes of the annealing furnace. It does not require frequent manual adjustment and is more convenient to use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of the structure at point A; Figure 3 for Figure 1 An enlarged schematic diagram of the structure at point B; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 for Figure 4 An enlarged schematic diagram of the structure at point C.

[0018] In the diagram: 1. Annealing furnace body; 2. Waste heat outlet pipe; 201. Hot air outlet; 3. Drying conveyor belt; 4. Hot air baffle; 5. Guide groove; 6. Limiting hole; 7. First rotating shaft; 8. First synchronous pulley; 9. Synchronous belt; 10. Valve stem; 11. Manual adjustment handle; 12. Second synchronous pulley; 13. Limiting block; 14. Limiting block baffle; 15. Torsion spring; 16. Guide rod; 17. Handle; 18. Movable handle; 19. Return spring; 20. Limiting rod; 21. Adjusting baffle; 22. Second rotating shaft; 23. Valve plate; 24. Fixing frame; 25. Drive shaft; 26. Drive impeller; 27. First bevel gear; 28. Second bevel gear. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] like Figures 1-5 As shown, this application provides a waste heat recycling device for a glass annealing furnace, comprising: an annealing furnace body 1; a waste heat extraction pipe 2, disposed at the top of the annealing furnace body 1, with a hot air outlet 201 at its end away from the annealing furnace body 1; a drying conveyor belt 3, disposed above the hot air outlet 201; an air volume regulating component, disposed on the waste heat extraction pipe 2, for regulating the air volume at the hot air outlet 201; and a guiding component, disposed at the bottom of the drying conveyor belt 3, for guiding the hot air blown out of the hot air outlet 201.

[0022] Specifically, such as Figure 1-2 As shown, the air volume regulating component includes a fixed frame 24, which is fixed inside the waste heat outlet pipe 2. A drive shaft 25 is rotatably mounted on the fixed frame 24. A drive impeller 26 is provided at the end of the drive shaft 25 near the annealing kiln body 1. A valve plate 23 is provided inside the waste heat outlet pipe 2. The component also includes a transmission component and an opening component. The opening component is used to adjust the opening of the valve plate 23. One end of the transmission component is connected to the drive shaft 25, and the other end is connected to the opening component. The transmission component is used to drive the opening component.

[0023] Specifically, such as Figure 5As shown, the opening component includes a valve stem 10, which is rotatably mounted on the waste heat outlet pipe 2. The bottom end of the valve stem 10 is connected to the valve plate 23, and the top of the valve stem 10 is equipped with a manual adjustment handle 11. The outer wall of the waste heat outlet pipe 2 is provided with a limit block baffle 14. There are two sets of limit block baffles 14, which are engaged with the waste heat outlet pipe 2. A limit block 13 is provided at the corresponding position of the limit block baffle 14 on the valve stem 10. A torsion spring 15 is sleeved on the valve stem 10. One end of the torsion spring 15 is connected to the limit block 13, and the other end is connected to the waste heat outlet pipe 2, which is used to drive the limit block 13 to rotate toward the limit block baffle 14.

[0024] Adjust the manual adjustment handle 11 to overcome the elastic force of the torsion spring 15 and drive the limit block 13 to disengage from a set of limit block baffles 14. Then, you can directly rotate the valve stem 10 to adjust the opening of the valve stem 10. After the adjustment is completed, adjust the position of the locked limit block baffle 14 to the position of the limit block 13. At this time, release the manual adjustment handle 11. The torsion spring 15 will drive the limit block 13 to move toward the limit block baffle 14 to complete the manual opening lock.

[0025] Specifically, such as Figure 5 As shown, the transmission component includes a first rotating shaft 7, which is rotatably mounted on the waste heat outlet pipe 2. A second bevel gear 28 is provided at the bottom of the first rotating shaft 7, and a first bevel gear 27 is provided at the position of the second bevel gear 28 on the drive shaft 25. The first bevel gear 27 and the second bevel gear 28 are meshed together. A first synchronous pulley 8 is provided at the top of the first rotating shaft 7, and a second synchronous pulley 12 is provided on the valve stem 10. A synchronous belt 9 is sleeved on the outer side of the first synchronous pulley 8 and the second synchronous pulley 12.

[0026] During the operation of the annealing furnace body 1, the high-temperature waste heat and hot air generated enter the waste heat extraction pipe 2. The high-speed hot air will impact the drive impeller 26, causing the drive shaft 25 to rotate. When the drive shaft 25 rotates, it drives the first rotating shaft 7 to rotate through the meshing first bevel gear 27 and second bevel gear 28. The first rotating shaft 7 drives the valve stem 10 to rotate through the transmission of the first synchronous pulley 8, the synchronous belt 9 and the second synchronous pulley 12. The rotation of the valve stem 10 can drive the valve plate 23 to deflect, thereby automatically adjusting the ventilation opening in the waste heat extraction pipe 2.

[0027] Specifically, such as Figure 4 As shown, the guiding component includes a hot air baffle 4, which is disposed at the bottom of the drying conveyor belt 3 and located on both sides of the hot air outlet 201. A second rotating shaft 22 is rotatably disposed on the hot air baffle 4, and an adjusting baffle 21 is sleeved on the second rotating shaft 22. It also includes an adjusting component disposed on the hot air baffle 4 for adjusting the angle of the adjusting baffle 21.

[0028] After the hot air is discharged from the hot air outlet 201, the hot air baffles 4 on both sides can guide the hot air flow direction and adjust the hot air diffusion angle according to the stacking thickness and laying range of the waste glass to be dried.

[0029] Specifically, such as Figure 3 As shown, the adjusting component includes a guide groove 5, which is formed on the hot air baffle 4. A guide rod 16 is provided at the position of the adjusting baffle 21 corresponding to the guide groove 5, and the guide rod 16 is slidably disposed in the guide groove 5. The adjusting component also includes a handle 17, which is fixed on the guide rod 16. A movable handle 18 is slidably disposed on the guide rod 16. The movable handle 18 is located between the hot air baffle 4 and the handle 17. A return spring 19 is connected between the movable handle 18 and the handle 17 to push the movable handle 18 toward the hot air baffle 4. Multiple sets of limiting holes 6 are formed on the hot air baffle 4, and a limiting rod 20 is provided at the position of the movable handle 18 corresponding to the limiting hole 6.

[0030] During adjustment, first pull the movable handle 18 to overcome the elastic force of the return spring 19, causing the limit rod 20 to disengage from the limit hole 6. Then pull the handle 17 to drive the guide rod 16 to slide along the guide groove 5. The guide rod 16 drives the adjusting baffle 21 to rotate around the second rotating shaft 22. After adjusting to the target angle, release the movable handle 18. The return spring 19 pushes the movable handle 18 to reset, causing the limit rod 20 to insert into the corresponding limit hole 6 to complete the locking.

[0031] The specific details of this plan are as follows: In actual use, the high-temperature waste heat generated during the operation of the annealing kiln body 1 enters the waste heat extraction pipe 2. The high-speed flowing hot air impacts the drive impeller 26, causing the drive shaft 25 to rotate. When the drive shaft 25 rotates, it drives the first rotating shaft 7 to rotate through the meshing first bevel gear 27 and second bevel gear 28. The first rotating shaft 7 drives the valve stem 10 to rotate through the transmission of the first synchronous pulley 8, synchronous belt 9 and second synchronous pulley 12. The rotation of the valve stem 10 can drive the valve plate 23 to deflect, thereby automatically adjusting the ventilation opening in the waste heat extraction pipe 2. Under normal conditions, the torsion spring 15 drives the limit block 13 to move toward the limit block baffle 14, so that the valve plate 23 closes the waste heat extraction pipe 2. When it is necessary to open the valve plate 23, the resistance of the torsion spring 15 needs to be overcome. Through the engaging limit block baffle 14, the positions of the two sets of limit block baffles 14 can be adjusted, thereby adjusting the rotation angle of the limit block 13 and thus adjusting the opening of the valve plate 23.

[0032] When the hot air output from the annealing furnace body 1 is large and the flow rate is fast, the rotation speed of the drive shaft 25 increases accordingly. Through the transmission mechanism, the valve plate 23 rotates to a larger angle, overcoming the resistance of the torsion spring 15 and increasing the opening of the waste heat extraction pipe 2, thereby increasing the hot air discharge volume. When the hot air output from the annealing furnace body 1 is small and the flow rate is slow, the rotation speed of the drive shaft 25 decreases accordingly. Through the transmission mechanism, the valve plate 23 rotates, overcoming the resistance of the torsion spring 15 and decreasing the opening of the waste heat extraction pipe 2, thereby stabilizing the hot air output volume. Automatic air volume adjustment can be achieved without additional electric power components, reducing the overall energy consumption and operating cost of the device.

[0033] When manual adjustment of the air volume is required, simply adjust the manual adjustment handle 11 to overcome the elastic force of the torsion spring 15 and drive the limit block 13 to disengage from a set of limit block baffles 14. Then, directly rotate the valve stem 10 to adjust the opening of the valve stem 10. After adjustment, adjust the position of the locked limit block baffle 14 to the position of the limit block 13. At this time, release the manual adjustment handle 11, and the torsion spring 15 will drive the limit block 13 to move toward the limit block baffle 14, completing the manual opening lock. It has both automatic and manual adjustment functions to meet the needs of different production scenarios.

[0034] After the hot air is discharged from the hot air outlet 201, the hot air baffles 4 on both sides can guide the hot air flow. The hot air diffusion angle can be adjusted according to the stack thickness and laying range of the waste glass to be dried. When adjusting, first pull the movable handle 18 to overcome the elastic force of the return spring 19, and drive the limit rod 20 to disengage from the limit hole 6. Then pull the handle 17 to drive the guide rod 16 to slide along the guide groove 5. The guide rod 16 drives the adjusting baffle 21 to rotate around the second rotating shaft 22. After adjusting to the target angle, release the movable handle 18. The return spring 19 pushes the movable handle 18 to reset, and drives the limit rod 20 to insert into the limit hole 6 at the corresponding position to complete the locking. This allows the hot air to stably cover the surface of the waste glass and make full use of the heat carried by the hot air to complete the drying operation of the waste glass.

[0035] This device directly introduces the waste heat discharged from the annealing furnace into the waste glass drying process, replacing the fossil energy consumed by the original independent drying furnace. This not only reduces heat waste and heat pollution, meeting the requirements of green production development, but also effectively reduces the energy cost of the waste glass drying process, thereby reducing the overall energy consumption and input of glass production.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0037] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for recycling waste heat from a glass annealing furnace, characterized in that, include: Annealing furnace body (1); Waste heat extraction pipe (2) is provided at the top of the annealing furnace body (1), and a hot air outlet (201) is provided at the end away from the annealing furnace body (1). A drying conveyor belt (3) is disposed above the hot air outlet (201); An air volume regulating component is installed on the waste heat outlet pipe (2) and is used to regulate the air volume at the hot air outlet (201); A guiding component is provided at the bottom of the drying conveyor belt (3) for guiding the hot air blown out of the hot air outlet (201).

2. The waste heat recovery device for a glass annealing furnace according to claim 1, characterized in that, The air volume regulating component includes a fixed frame (24), which is fixed inside the waste heat outlet pipe (2). A drive shaft (25) is rotatably mounted on the fixed frame (24). A drive impeller (26) is mounted on the end of the drive shaft (25) near the end of the annealing kiln body (1). A valve plate (23) is mounted inside the waste heat outlet pipe (2). It also includes a transmission component and an opening component. The opening component is used to adjust the opening degree of the valve plate (23). One end of the transmission component is connected to the drive shaft (25) and the other end is connected to the opening component. The transmission component is used to drive the opening component.

3. The waste heat recovery device for a glass annealing furnace according to claim 2, characterized in that, The opening element includes a valve stem (10), which is rotatably mounted on the waste heat outlet pipe (2), and the bottom end of the valve stem (10) is connected to the valve plate (23). A manual adjustment handle (11) is provided on the top of the valve stem (10).

4. The waste heat recovery device for a glass annealing furnace according to claim 3, characterized in that, The outer wall of the waste heat outlet pipe (2) is provided with a limit block baffle (14). There are two sets of limit block baffles (14), which are engaged with the waste heat outlet pipe (2). The valve stem (10) is provided with a limit block (13) at the position corresponding to the limit block baffle (14). A torsion spring (15) is sleeved on the valve stem (10). One end of the torsion spring (15) is connected to the limit block (13), and the other end is connected to the waste heat outlet pipe (2), which is used to drive the limit block (13) to rotate toward the limit block baffle (14).

5. A waste heat recovery device for a glass annealing furnace according to claim 4, characterized in that, The transmission component includes a first rotating shaft (7), which is rotatably mounted on the waste heat outlet pipe (2). A second bevel gear (28) is provided at the bottom of the first rotating shaft (7), and a first bevel gear (27) is provided at the position of the drive shaft (25) corresponding to the second bevel gear (28). The first bevel gear (27) and the second bevel gear (28) are meshed.

6. The waste heat recovery device for a glass annealing furnace according to claim 5, characterized in that, The first rotating shaft (7) is provided with a first synchronous pulley (8) at its top, and the valve stem (10) is provided with a second synchronous pulley (12). The first synchronous pulley (8) and the second synchronous pulley (12) are fitted with a synchronous belt (9) on their outer sides.

7. The waste heat recovery device for a glass annealing furnace according to claim 1, characterized in that, The guiding component includes a hot air baffle (4), which is located at the bottom of the drying conveyor belt (3) and on both sides of the hot air outlet (201). A second rotating shaft (22) is rotatably mounted on the hot air baffle (4), and an adjusting baffle (21) is sleeved on the second rotating shaft (22). It also includes an adjustment component, which is disposed on the hot air baffle (4) for adjusting the angle of the adjustment baffle (21).

8. The waste heat recovery device for a glass annealing furnace according to claim 7, characterized in that, The adjusting component includes a guide groove (5), which is formed on the hot air baffle (4). The adjusting baffle (21) is provided with a guide rod (16) at the position corresponding to the guide groove (5), and the guide rod (16) is slidably disposed in the guide groove (5).

9. A waste heat recovery device for a glass annealing furnace according to claim 8, characterized in that, The adjusting component also includes a handle (17), which is fixed on the guide rod (16). A movable handle (18) is slidably disposed on the guide rod (16). The movable handle (18) is located between the hot air baffle (4) and the handle (17). A return spring (19) is connected between the movable handle (18) and the handle (17) to push the movable handle (18) toward the hot air baffle (4).

10. A waste heat recovery device for a glass annealing furnace according to claim 9, characterized in that, The hot air baffle (4) has multiple sets of limiting holes (6), and the movable handle (18) is provided with a limiting rod (20) at the position corresponding to the limiting hole (6).

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