Photovoltaic glass tempering waste heat recovery system

Abstract

The utility model provides a photovoltaic glass tempering waste heat recovery system which comprises a tempering furnace (1), the tempering furnace (1) is sequentially connected with a gas-water heat exchange device (6), a hot water tank (10) and a pure water heat exchange plate exchanger (14), waste heat generated by the tempering furnace (1) heats first low-temperature pure water into high-temperature pure water through the gas-water heat exchange device (6), the high-temperature pure water is stored in the hot water tank (10), and the hot water tank (10) is connected with the pure water heat exchange plate exchanger (14). And the second low-temperature pure water is mixed with the second low-temperature pure water in the pure water heat exchange plate exchanger (14). The photovoltaic glass tempering waste heat recovery system is simple in structure, convenient to operate and good in using effect.

Description

Technical Field

[0001] This application relates to the field of photovoltaic glass production technology, and in particular to a photovoltaic glass tempering waste heat recovery system. Background Technology

[0002] In current photovoltaic glass production processes, the tempering furnace process includes three stages: preheating, tempering, and annealing, which require at least 120 minutes, 260 minutes, and 55 minutes respectively. Sufficient cooling time is necessary in each of these stages to prevent product deformation. Specifically, during the preheating stage, the product support needs to be cooled in the preheating chamber after preheating, and the product and support exiting the tempering furnace need to be cooled in the annealing stage. All of these cooling processes utilize top-mounted fans for air cooling, resulting in a significant amount of heat being dissipated into the production area, leading to persistently high ambient temperatures. Furthermore, this heat dissipation also results in substantial energy waste, hindering energy conservation and emission reduction. Utility Model Content

[0003] The technical problem to be solved by this application is to provide a photovoltaic glass tempering waste heat recovery system. This photovoltaic glass tempering waste heat recovery system heats the heat in the preheating and annealing sections of the tempering furnace through a gas-water heat exchanger and a pure water heat exchange plate to heat the low-temperature pure water for subsequent processes. This avoids heat dissipation into the air, effectively reduces the ambient temperature of the production site, and also facilitates the conversion and utilization of excess heat. It effectively achieves the goal of efficient energy utilization and energy saving and consumption reduction. The system has a simple structure, is easy to operate, and effectively reduces production costs.

[0004] To address the aforementioned technical problems, this application provides a photovoltaic glass tempering waste heat recovery system, including a tempering furnace. The tempering furnace is sequentially connected to a gas-water heat exchanger, a hot water tank, and a pure water heat exchange plate. The waste heat generated by the tempering furnace heats a first low-temperature pure water to high-temperature pure water through the gas-water heat exchanger. The high-temperature pure water is stored in the hot water tank and mixed with a second low-temperature pure water in the pure water heat exchange plate.

[0005] In some embodiments, a fan, a first remote thermometer, and an electric air valve are further provided between the tempering furnace and the gas-water heat exchange device, and the fan is connected to the tempering furnace through an insulated air duct.

[0006] In some embodiments, a remote pressure gauge, a second remote thermometer, and a first hot water pump are sequentially arranged between the air-water heat exchange device and the hot water tank along the water flow direction.

[0007] In some embodiments, the hot water tank is provided with a hot water tank vent valve.

[0008] In some embodiments, a second hot water pump and an electric flow valve are sequentially provided between the hot water tank and the pure water heat exchange plate along the water flow direction.

[0009] In some embodiments, a control system is also included, which is signal-connected to the fan, the first remote thermometer, the electric air valve, the remote pressure gauge, the second remote thermometer, the first hot water pump, the hot water tank vent valve, the second hot water pump, and the electric flow valve.

[0010] In some embodiments, the first low-temperature pure water is pure water with a temperature of less than or equal to 30°C, the second low-temperature pure water is pure water with a temperature of 35-45°C, and the high-temperature pure water is pure water with a temperature of 55-80°C.

[0011] In some embodiments, the gas-water heat exchanger is a finned combined air handling unit gas-water heat exchanger.

[0012] In some embodiments, the pure water heat exchange plate is replaced with a spiral tube type water heat exchange plate.

[0013] In some embodiments, the hot water tank is provided with an insulation layer.

[0014] The photovoltaic glass tempering waste heat recovery system provided in this application, through the above technical solution, includes a tempering furnace. A gas-water heat exchanger, a hot water tank, and a pure water heat exchanger are sequentially connected to the tempering furnace. The waste heat generated by the tempering furnace heats first low-temperature pure water to high-temperature pure water through the gas-water heat exchanger. The high-temperature pure water is stored in the hot water tank and mixed with second low-temperature pure water in the pure water heat exchanger. The photovoltaic glass tempering waste heat recovery system provided in this application, with a gas-water heat exchanger, a hot water tank, and a pure water heat exchanger connected to the tempering furnace, recovers the heat energy emitted by the tempering furnace during the preheating and annealing stages through the gas-water heat exchanger. The recovered heat energy is then used to increase the temperature of the pure water for cleaning equipment through the pure water heat exchanger, avoiding the impact of emitted heat energy on the surrounding environment and facilitating energy conservation and emission reduction, effectively reducing production costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a specific embodiment of the photovoltaic glass tempering waste heat recovery system disclosed in this application.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Tempering furnace; 2. Insulated air duct; 3. Fan; 4. First remote thermometer; 5. Electric air valve; 6. Gas-water heat exchanger; 7. Remote pressure gauge; 8. Second remote thermometer; 9. First hot water pump; 10. Hot water tank; 11. Hot water tank vent valve; 12. Second hot water pump; 13. Electric flow valve; 14. Water heat exchange plate. Detailed Implementation

[0019] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0021] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0023] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0024] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0026] like Figure 1 As shown, this application discloses a photovoltaic glass tempering waste heat recovery system, including a tempering furnace 1. The tempering furnace 1 is sequentially connected to a gas-water heat exchange device 6, a hot water tank 10, and a pure water heat exchange plate 14. The waste heat generated by the tempering furnace 1 heats the first low-temperature pure water to high-temperature pure water through the gas-water heat exchange device 6. The high-temperature pure water is stored in the hot water tank 10 and mixed with the second low-temperature pure water in the pure water heat exchange plate 14.

[0027] The existing tempering furnace operates normally through three stages: preheating, tempering, and annealing. During the preheating stage, the product racks require cooling of the preheating chamber after preheating. Similarly, during the annealing stage, the products exiting the furnace and the racks holding them also require cooling in the annealing section. Both processes rely on top-mounted fans for air cooling, resulting in significant heat dissipation into the production area. Specifically, the preheating stage is set at 410℃, requiring a cooling time of 2 hours to 180℃, and this process is repeated every 6-7 hours. The annealing stage is set at 360℃, requiring a cooling time of 55 minutes to 180℃, and this process is also repeated every 6-7 hours. As can be seen, the measured exhaust temperatures in both the preheating and annealing stages exceed 100℃, significantly impacting the overall temperature of the production area and resulting in substantial heat energy waste.

[0028] Therefore, in this application, to address the aforementioned problems, the heat energy in the preheating and annealing sections is recovered and utilized. The heat energy dissipated from the tempering furnace is absorbed by the gas-water heat exchanger 6, thereby increasing the temperature of the first low-temperature pure water in the gas-water heat exchanger 6 and converting it into high-temperature pure water. Then, the high-temperature pure water is mixed with the second low-temperature pure water through the pure water heat exchanger plate 14 to obtain pure water at a suitable temperature for use in other equipment on-site. Preferably, it can be used for cleaning equipment.

[0029] It should be noted that the second type of low-temperature pure water can be stored in the pure water tank in advance, and a pure water supply pump at 65m³ / h can be used. 2 The second low-temperature pure water is supplied to the pure water heat exchange plate 14 at a rate of / h.

[0030] In some possible implementations, a fan 3, a first remote thermometer 4, and an electric air valve 5 are also provided between the tempering furnace 1 and the gas-water heat exchange device 6. The fan 3 is connected to the tempering furnace 1 through an insulated air duct 2.

[0031] In some embodiments, the heat-insulating duct 2 is preferably a rectangular heat-insulating duct. The heat required to be dissipated in the preheating section and annealing section is conducted through the heat-insulating duct 2 to the gas-water heat exchange device 6 for heat transfer with the first low-temperature pure water in the gas-water heat exchange device 6, thereby converting the first low-temperature pure water into high-temperature pure water.

[0032] In some possible implementations, a remote pressure gauge 7, a second remote thermometer 8, and a first hot water pump 9 are also sequentially arranged between the air-water heat exchange device 6 and the hot water tank 10 along the water flow direction.

[0033] In some embodiments, the second remote thermometer 8 is connected to the control system, which is equipped with a digital display device that can display the temperature of the converted high-temperature pure water in real time. The first hot water pump 9 can quickly pump out the converted high-temperature pure water, effectively improving the conversion efficiency.

[0034] In some possible implementations, the hot water tank 10 is provided with a hot water tank vent valve 11.

[0035] In some embodiments, the hot water tank vent valve 11 can quickly discharge the high-temperature pure water in the hot water tank 10 when needed, so as to avoid excessive high-temperature pure water in the hot water tank 10.

[0036] In some possible implementations, a second hot water pump 12 and an electric flow valve 13 are also sequentially provided between the hot water tank 10 and the pure water heat exchange plate 14 along the water flow direction.

[0037] In some embodiments, the second hot water pump 12 can rapidly pump out the high-temperature pure water in the hot water tank 10 at a certain pressure and mix it with the second low-temperature pure water in the pure water heat exchange plate 14 at a certain pressure. That is, the high-temperature pure water from the second hot water pump 12 forms water turbulence during the mixing process with the second low-temperature pure water due to the pressure of the second hot water pump 12, making the mixing more efficient and the mixing effect better.

[0038] In some possible implementations, the photovoltaic glass tempering waste heat recovery system of this application also includes a control system, which is signal-connected to the fan 3, the first remote thermometer 4, the electric air valve 5, the remote pressure gauge 7, the second remote thermometer 8, the first hot water pump 9, the hot water tank vent valve 11, the second hot water pump 12, and the electric flow valve 13.

[0039] In some embodiments, the control system includes a PLC control module for controlling the entire photovoltaic glass tempering waste heat recovery system to adjust the operation of each component according to the automatically detected temperature of the high-temperature pure water.

[0040] In some possible implementations, the first low-temperature pure water is pure water with a temperature of less than or equal to 30°C, the second low-temperature pure water is pure water with a temperature of 35-45°C, and the high-temperature pure water is pure water with a temperature of 55-80°C.

[0041] In some embodiments, the first remote thermometer 4 is used to detect the temperature of the gas emitted in the preheating section and the annealing section, and the second remote thermometer 8 is used to detect the temperature of the high-temperature pure water.

[0042] In some possible implementations, the gas-water heat exchange device 6 is a finned combined air handling unit gas-water heat exchange device.

[0043] In some possible implementations, the pure water heat exchanger 14 is a spiral tube type water heat exchanger.

[0044] In some possible implementations, the hot water tank 10 is provided with an insulation layer.

[0045] As a preferred embodiment of the photovoltaic glass tempering waste heat recovery system of this application, the photovoltaic glass tempering waste heat recovery system includes a tempering furnace 1 and a control system. The tempering furnace 1 is connected to a gas-water heat exchanger 6, a hot water tank 10, and a pure water heat exchange plate 14. A fan 3, a first remote thermometer 4, and an electric air valve 5 are also provided between the tempering furnace 1 and the gas-water heat exchanger 6. The fan 3 is connected to the tempering furnace 1 through an insulated air duct 2. A remote pressure gauge 7, a second remote thermometer 8, and a first hot water pump 9 are also sequentially provided between the gas-water heat exchanger 6 and the hot water tank 10 along the water flow direction. A hot water tank vent valve 11 is provided on the hot water tank 10. A connection is made between the hot water tank 10 and the pure water heat exchange plate 14 along the water flow direction. The system also includes a second hot water pump 12 and an electric flow valve 13. The control system is connected to the fan 3, the first remote thermometer 4, the electric air valve 5, the remote pressure gauge 7, the second remote thermometer 8, the first hot water pump 9, the hot water tank vent valve 11, the second hot water pump 12, and the electric flow valve 13. The control system includes a PLC control module, which is used to control the entire photovoltaic glass tempering waste heat recovery system to adjust the operation of each component according to the automatically detected temperature of the high-temperature pure water. The waste heat generated by the tempering furnace 1 heats the first low-temperature pure water to high-temperature pure water through the gas-water heat exchanger 6. The high-temperature pure water is stored in the hot water tank 10 and mixed with the second low-temperature pure water in the pure water heat exchanger plate 14.

[0046] Therefore, based on the above preferred embodiments, the process flow of the photovoltaic glass tempering waste heat recovery system of this application is as follows:

[0047] In the first step, the heat emitted by the tempering furnace 1 during the preheating and annealing processes is conducted to the gas-water heat exchange device 6 through the insulated air duct 2 and the electric air valve 5. The first low-temperature pure water with a temperature greater than 100°C and a temperature less than or equal to 30°C exchanges heat with the hot air through the gas-water heat exchange device 6, and obtains high-temperature pure water with a temperature of 55-80°C. The lower-temperature hot air with a temperature less than 60°C is discharged.

[0048] The second step involves storing high-temperature pure water into the hot water tank 10 via the first hot water pump 9.

[0049] The third step involves the hot water in the hot water tank 10 entering the pure water heat exchange plate 14 through the second hot water pump 12, where it mixes and exchanges heat with the second low-temperature pure water to obtain second low-temperature pure water with a temperature of 35-45℃, which can be directly used in the cleaning machine operation.

[0050] It can be seen that the photovoltaic glass tempering waste heat recovery system of this application solves the problem of high-temperature heat dissipated to the production site during the preheating and annealing processes, avoiding the high-temperature working environment caused by this. On the other hand, it also directly solves the problem of pure water heating in the cleaning machine operation, truly achieving waste utilization and effectively saving production costs.

[0051] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0052] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A photovoltaic glass tempering waste heat recovery system comprising a tempering furnace (1), characterized in that, The tempering furnace (1) is sequentially connected with an air-water heat exchange device (6), a hot water tank (10) and a pure water heat exchange plate heat exchanger (14), the waste heat generated by the tempering furnace (1) is used to heat first low-temperature pure water to high-temperature pure water through the air-water heat exchange device (6), the high-temperature pure water is stored in the hot water tank (10) and mixed with second low-temperature pure water in the pure water heat exchange plate heat exchanger (14).

2. The photovoltaic glass solarization waste heat recovery system of claim 1, wherein, The tempering furnace (1) is further provided with a fan (3), a first remote thermometer (4) and an electric air valve (5) between the tempering furnace (1) and the air-water heat exchange device (6), and the fan (3) is communicated with the tempering furnace (1) through an adiabatic air pipe (2).

3. The photovoltaic glass solarization waste heat recovery system of claim 2, wherein, The air-water heat exchange device (6) and the hot water tank (10) are further sequentially provided with a remote pressure gauge (7), a second remote thermometer (8) and a first hot water pump (9) along the water flow direction.

4. The photovoltaic glass solarization waste heat recovery system of claim 3, wherein, The hot water tank (10) is provided with a hot water tank emptying valve (11).

5. The photovoltaic glass solarization waste heat recovery system of claim 4, wherein, The hot water tank (10) and the pure water heat exchange plate heat exchanger (14) are further sequentially provided with a second hot water pump (12) and an electric flow valve (13) along the water flow direction.

6. The photovoltaic glass solarization waste heat recovery system of claim 5, wherein, A control system is further included, and the control system is signal connected with the fan (3), the first remote thermometer (4), the electric air valve (5), the remote pressure gauge (7), the second remote thermometer (8), the first hot water pump (9), the hot water tank emptying valve (11), the second hot water pump (12) and the electric flow valve (13).

7. The photovoltaic glass tempering waste heat recovery system according to any one of claims 1 to 6, characterized in that, The first low-temperature pure water is pure water with a temperature less than or equal to 30℃, the second low-temperature pure water is pure water with a temperature of 35-45℃, and the high-temperature pure water is pure water with a temperature of 55-80℃.

8. The photovoltaic glass tempering waste heat recovery system according to any one of claims 1 to 6, characterized in that, The air-water heat exchange device (6) is a fin combined air cabinet air-water heat exchange device.

9. The photovoltaic glass tempering waste heat recovery system according to any one of claims 1 to 6, characterized in that, The pure water heat exchange plate heat exchanger (14) is a spiral pipe type water heat exchange plate heat exchanger.

10. The photovoltaic glass tempering waste heat recovery system according to any one of claims 1 to 6, characterized in that, The hot water tank (10) is externally provided with a heat preservation layer.

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