A flue gas shunting device for a cooling section of a photovoltaic glass kiln

Abstract

This invention discloses a flue gas diversion device for the cooling section of a photovoltaic glass kiln, relating to the field of flue gas diversion technology for kiln cooling sections. It includes a horizontal passageway structure for the kiln, with a pedestrian walkway structure fixedly installed above it. The walkway structure consists of a supporting grid plate, a connecting support plate, and a top step. A flue gas diversion structure is fixedly installed on the side of the horizontal passageway structure via connecting pipe clamps. The flue gas diversion structure is also fixedly connected to the walkway structure via two connecting brackets. The flue gas diversion structure consists of a flue gas diversion bend, an electric discharge valve, and a large-diameter conical pipe. By setting the flue gas diversion structure at the original observation port pipe of the horizontal passageway, some of the high-temperature flue gas within the horizontal passageway can be diverted in advance, breaking the natural flow path of the flue gas along the passage. This fundamentally reduces the probability of flue gas carrying ash deposits and high-temperature volatiles from the molten glass flow towards the overflow port and mixing with the molten glass.

Description

Technical Field

[0001] This invention relates to the field of flue gas diversion technology in the cooling section of a kiln, and particularly to a flue gas diversion device for the cooling section of a photovoltaic glass kiln. Background Technology

[0002] In the production of photovoltaic glass, the transverse passage of the furnace cooling section is a crucial transition channel for molten glass flowing from the melting section to the forming section. The flow state of the flue gas inside directly determines the temperature uniformity and cleanliness of the molten glass, thus affecting the core performance indicators of the final photovoltaic glass, such as light transmittance and flatness. In existing technologies, the flue gas in the transverse passage of the furnace cooling section mostly flows naturally along the channel. The condensate generated by the liquid flow on the molten glass, including ash deposits, stones, and various inclusions formed by the condensation of high-temperature volatiles, is easily carried by the flowing flue gas into the overflow port and eventually mixes into the interior of the molten glass, forming product defects that are difficult to eliminate through subsequent processes. This significantly reduces the yield rate of finished photovoltaic glass and increases the production loss costs for enterprises.

[0003] Meanwhile, with the rapid increase in photovoltaic glass production capacity, the amount of molten glass drawn from the furnace is constantly increasing, leading to a significant increase in the amount of flue gas and heat introduced into the horizontal cooling channel. When the internal temperature of the vertical and horizontal channels exceeds the process-set threshold, the excess heat cannot be discharged in time, causing dissolved gases inside the molten glass to precipitate and form a large number of microbubbles, resulting in bubble defects on the glass surface and seriously affecting the power generation efficiency and service life of photovoltaic glass. Currently, the industry lacks targeted flue gas diversion and control devices, making it difficult to meet the stringent requirements of modern photovoltaic glass production lines for process stability and product quality. Summary of the Invention

[0004] The main objective of this invention is to provide a flue gas diversion device for the cooling section of a photovoltaic glass furnace, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A flue gas diversion device for the cooling section of a photovoltaic glass furnace includes a horizontal passage structure of the furnace. A pedestrian walkway structure is fixedly installed above the horizontal passage structure. The pedestrian walkway structure consists of a supporting grid plate, a connecting support plate, and a top step. A flue gas diversion structure is fixedly installed on the side of the horizontal passage structure of the furnace through connecting pipe clamps. The flue gas diversion structure is also fixedly connected to the pedestrian walkway structure through two connecting fixing brackets. The flue gas diversion structure consists of a flue gas diversion bend, an electric discharge valve, and a large-diameter cone pipe. The electric discharge valve is fixedly installed at the upper end of the flue gas diversion bend, and the large-diameter cone pipe is fixedly installed at the upper end of the electric discharge valve. The upper end of the large-diameter cone pipe faces the pedestrian walkway structure.

[0006] Preferably, the kiln transverse passage structure includes a transverse passage body and an observation port pipe. The observation port pipe is inserted into the side wall of the transverse passage body and is fixedly connected to the transverse passage body by bolts. A temperature sensor is installed inside the transverse passage body.

[0007] Preferably, the pedestrian walkway structure has several connecting support plates that are evenly installed at the lower end of the supporting grid plate, and several connecting support plates are simultaneously and evenly installed at the upper end of the transverse passage body. The connecting support plates are fixedly connected to the supporting grid plate and the transverse passage body by welding.

[0008] Preferably, the top pedal of the pedestrian walkway structure has honeycomb holes, and the top pedal is fixedly installed on the upper end of the supporting grid plate by bolts.

[0009] Preferably, the electric discharge valve on the flue gas diversion structure is fixedly connected to the flue gas diversion bend and the large-diameter tapered pipe by bolts.

[0010] Preferably, the lower part of the flue gas diversion bend on the flue gas diversion structure is sleeved on the observation port pipe on the kiln horizontal passage structure, and the large-diameter cone pipe is located below the connecting support plate on the pedestrian walkway structure.

[0011] Preferably, the connecting fixing frame consists of an inclined support plate and a bottom connecting plate. The lower end of the inclined support plate is fixedly installed on the upper outer wall of the flue gas diversion bend by welding. The upper end of the inclined support plate is fixedly installed on the lower end of the bottom connecting plate by welding. The bottom connecting plate is fixedly installed on the lower end of the supporting grid plate by welding.

[0012] The connecting pipe clamp consists of two metal fixing half-rings and two semi-annular heat-insulating ceramic limiting liners. The two metal fixing half-rings are fixed and spliced ​​together to form a ring, which is sleeved on the lower part of the flue gas diversion bend. The two semi-annular heat-insulating ceramic limiting liners are respectively fixedly installed on the inner walls of the two metal fixing half-rings, and the semi-annular heat-insulating ceramic limiting liners are also tightly attached to the outer wall of the flue gas diversion bend.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) By setting a flue gas diversion structure at the original observation port pipe of the main body of the horizontal passage, some of the high-temperature flue gas in the main body of the horizontal passage can be diverted in advance, breaking the natural flow path of the flue gas along the passage. This reduces the probability of the flue gas carrying the liquid flow of the glass liquid and the condensation of high-temperature volatiles flowing to the overflow port and mixing into the glass liquid. At the same time, the pedestrian step net structure above the horizontal passage adopts a top step with honeycomb holes and a supporting grid plate, which can intercept some of the condensate carried in the rising flue gas, greatly reducing the occurrence rate of glass liquid inclusion defects. In addition, the electric discharge valve can be linked with the temperature sensor in the main body of the horizontal passage. When the amount of glass liquid drawn out of the furnace increases and the temperature in the main body of the horizontal passage exceeds the process set threshold, the opening of the electric discharge valve is automatically increased to quickly discharge excess heat, preventing the dissolved gas inside the glass liquid from precipitating and forming microbubbles, effectively reducing the bubble defects on the plate surface, and ensuring the core performance indicators such as light transmittance and flatness of photovoltaic glass.

[0014] (2) This device directly uses the existing observation port pipe in the horizontal passage of the kiln as the installation interface. The sealed connection between the flue gas diversion bend and the observation port pipe can be quickly completed by connecting the pipe clamp. There is no need to make destructive modifications such as opening holes or cutting the horizontal passage structure of the kiln, thus avoiding affecting the normal operation and service life of the kiln.

[0015] (3) This device adopts a double rigid fixing structure of connecting pipe clamp and connecting fixing frame. The connecting fixing frame firmly welds the flue gas diversion bend to the upper supporting grid plate through the inclined support plate and the bottom connecting plate. It has high structural strength and impact resistance, and can effectively resist the continuous impact of high temperature flue gas and the vibration generated by the operation of the kiln, avoiding the safety hazard of the device tilting and falling off. At the same time, the semi-circular heat insulation ceramic limiting lining on the connecting pipe clamp can not only isolate the heat transfer of high temperature flue gas and reduce the heat loss at the connection, but also play a limiting buffer role, preventing the metal fixing half ring from directly contacting the high temperature flue gas diversion bend and causing thermal deformation, which significantly extends the overall service life of the device.

[0016] (4) The large-diameter cone tube at the upper end of the flue gas diversion structure adopts a gradually expanding design with a smaller bottom and a larger top, which can effectively reduce the flow resistance of flue gas, improve the emission efficiency of flue gas, and ensure that excess heat is discharged quickly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the kiln transverse passage structure of the present invention; Figure 3 This is a schematic diagram of the flue gas diversion structure, the connecting fixing frame, and the connecting pipe clamp of the present invention. Figure 4 This is an exploded view of the pedestrian walkway structure of the present invention; Figure 5 This is a split view of the flue gas diversion structure of the present invention; Figure 6 This is an exploded view of the connecting clamp of the present invention.

[0018] In the diagram: 1. Kiln horizontal passage structure; 2. Pedestrian walkway structure; 3. Flue gas diversion structure; 4. Connecting fixing frame; 5. Connecting pipe clamp; 6. Main body of the horizontal passage; 7. Observation port pipe; 8. Supporting grating plate; 9. Connecting support plate; 10. Top step; 11. Flue gas diversion bend; 12. Electric exhaust valve; 13. Large diameter tapered pipe; 14. Inclined support plate; 15. Bottom connecting plate; 16. Metal fixing semi-ring; 17. Semi-circular heat-insulating ceramic limiting lining. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, a flue gas diversion device for the cooling section of a photovoltaic glass furnace includes a horizontal passage structure 1. A pedestrian walkway structure 2 is fixedly installed above the horizontal passage structure 1. The pedestrian walkway structure 2 consists of a supporting grid plate 8, a connecting support plate 9, and a top step 10. A flue gas diversion structure 3 is fixedly installed on the side of the horizontal passage structure 1 via connecting pipe clamps 5. The flue gas diversion structure 3 is also fixedly connected to the pedestrian walkway structure 2 via two connecting fixing brackets 4. The flue gas diversion structure 3 consists of a flue gas diversion bend 11, an electric discharge valve 12, and a large-diameter cone pipe 13. The electric discharge valve 12 is fixedly installed at the upper end of the flue gas diversion bend 11, and the large-diameter cone pipe 13 is fixedly installed at the upper end of the electric discharge valve 12. The end faces the pedestrian walkway net structure 2; by setting a flue gas diversion structure 3 at the original observation port pipe 7 of the main body of the horizontal passage 6, some of the high-temperature flue gas in the main body of the horizontal passage 6 can be diverted in advance, breaking the natural flow path of the flue gas along the passage, and fundamentally reducing the probability of the flue gas carrying the ash stones and high-temperature volatile condensate impurities generated by the liquid flow of the glass melt flowing to the overflow port and mixing into the glass melt. At the same time, the pedestrian walkway net structure 2 above the horizontal passage adopts a top footboard 10 with honeycomb holes and a supporting grid plate 8, which can intercept some of the condensate carried in the rising flue gas, greatly reducing the occurrence rate of glass melt inclusion defects. In addition, the electric discharge valve 12 can be linked with the temperature sensor in the main body of the horizontal passage 6. When the amount of glass melt drawn from the furnace increases, causing the main body of the horizontal passage 6 to be affected, the electric discharge valve 12 can be activated. When the internal temperature exceeds the process-set threshold, the electric exhaust valve 12 automatically increases its opening to quickly discharge excess heat, preventing the precipitation of dissolved gases inside the molten glass and the formation of microbubbles. This effectively reduces bubble defects on the glass surface and ensures the core performance indicators of photovoltaic glass, such as light transmittance and flatness. This device directly utilizes the existing observation port pipe 7 in the kiln's horizontal passage as the installation interface. A sealing connection between the flue gas diversion bend 11 and the observation port pipe 7 can be quickly completed via the connecting clamp 5, eliminating the need for destructive modifications such as opening or cutting into the kiln's horizontal passage structure 1, thus avoiding impact on the kiln's normal operation and service life. This device employs a double rigid fixing structure of the connecting clamp 5 and the connecting fixing frame 4. The connecting fixing frame 4 uses an inclined support plate 14 and a bottom connecting plate 15 to divert the flue gas... The diversion bend 11 is firmly welded to the upper supporting grid plate 8, possessing high structural strength and impact resistance. It can effectively resist the continuous impact of high-temperature flue gas and the vibration generated by kiln operation, avoiding the safety hazard of the device tilting and falling off. At the same time, the semi-annular heat-insulating ceramic limiting lining 17 on the connecting pipe clamp 5 can not only isolate the heat transfer of high-temperature flue gas and reduce heat loss at the connection, but also play a limiting and buffering role, preventing the metal fixing semi-ring 16 from directly contacting the high-temperature flue gas diversion bend 11 and causing thermal deformation, significantly extending the overall service life of the device. The large-diameter tapered pipe 13 set at the upper end of the flue gas diversion structure 3 adopts a gradually expanding design with a smaller bottom and a larger top, which can effectively reduce the flow resistance of flue gas, improve the emission efficiency of flue gas, and ensure the rapid discharge of excess heat.

[0021] Specifically, the kiln's horizontal passage structure 1 includes a horizontal passage body 6 and an observation port pipe 7. The observation port pipe 7 is inserted into the side wall of the horizontal passage body 6 and is fixedly connected to the horizontal passage body 6 by bolts. A temperature sensor is installed inside the horizontal passage body 6. Several connecting support plates 9 on the pedestrian walkway structure 2 are evenly installed at the lower end of the supporting grid plate 8, and several connecting support plates 9 are simultaneously and evenly installed at the upper end of the horizontal passage body 6. The connecting support plates 9 are fixedly connected to the supporting grid plate 8 and the horizontal passage body 6 by welding. The top step 10 on the pedestrian walkway structure 2 has honeycomb holes and is fixedly installed at the upper end of the supporting grid plate 8 by bolts. The electric discharge valve 12 on the flue gas diversion structure 3 is fixedly connected to the flue gas diversion bend 11 and the large-diameter cone pipe 13 by bolts. The lower part of the flue gas diversion bend 11 on the flue gas diversion structure 3 is sleeved on the kiln's horizontal passage structure 1. On the observation port pipe 7, the large-diameter tapered pipe 13 is located below the connecting support plate 9 on the pedestrian walkway structure 2. The connecting fixing frame 4 is composed of an inclined support plate 14 and a bottom connecting plate 15. The lower end of the inclined support plate 14 is fixedly installed on the upper outer wall of the flue gas diversion bend 11 by welding. The upper end of the inclined support plate 14 is fixedly installed on the lower end of the bottom connecting plate 15 by welding. The bottom connecting plate 15 is fixedly installed on the lower end of the support grid plate 8 by welding. The connecting pipe clamp 5 is composed of two metal fixing half rings 16 and two semi-annular heat-insulating ceramic limiting liners 17. The two metal fixing half rings 16 are fixedly spliced ​​into a ring by bolts. The ring is fitted on the lower part of the flue gas diversion bend 11. The two semi-annular heat-insulating ceramic limiting liners 17 are respectively fixedly installed on the inner wall of the two metal fixing half rings 16, and the semi-annular heat-insulating ceramic limiting liners 17 are also tightly attached to the outer wall of the flue gas diversion bend 11.

[0022] It should be noted that during the normal operation of the photovoltaic glass furnace, the high-temperature molten glass that has been melted in the melting section flows into the main body 6 of the horizontal passage structure 1 of the furnace for cooling and homogenization. Various inclusions, such as ash deposits, granules, and condensation of high-temperature volatiles, will form on the surface of the molten glass. At the same time, a large amount of high-temperature flue gas will flow naturally along the channel of the main body 6 towards the overflow port of the forming section. At this time, some of the high-temperature flue gas will enter the flue gas diversion bend 11 of the flue gas diversion structure 3 from the observation port pipe 7 on the side wall of the main body 6, actively breaking the single path of natural flow of flue gas along the channel, thereby reducing the entrainment of molten glass by flue gas from the source. The force that drives the inclusions towards the overflow port significantly reduces the probability of inclusions mixing into the molten glass. The high-temperature flue gas entering the flue gas diversion bend 11 flows upward through the electric discharge valve 12 and then enters the large-diameter cone 13. The large-diameter cone 13 adopts a gradually expanding structure design with a smaller bottom and a larger top, which can effectively reduce the flow resistance of the flue gas and increase the emission velocity of the flue gas, so that the diverted flue gas can be quickly discharged upward to the space below the pedestrian walkway structure 2. The top footboard 10 with honeycomb holes on the pedestrian walkway structure 2, together with the supporting grid plate 8 below it, forms a double-layer physical interception structure, which can effectively capture the condensate and dust particles carried in the rising flue gas. To prevent these impurities from falling back and mixing into the molten glass inside the transverse passage body 6, further improving the cleanliness of the molten glass, a temperature sensor pre-installed inside the transverse passage body 6 monitors the flue gas temperature and molten glass temperature in the cooling section in real time. When the molten glass draw-out from the furnace increases, causing the temperature inside the transverse passage body 6 to exceed the preset process threshold, the temperature sensor transmits the temperature signal to the furnace control system in real time. The control system automatically adjusts the opening of the electric discharge valve 12 according to the preset program, increasing the flue gas diversion flow rate and quickly discharging excess heat from the transverse passage body 6, preventing dissolved gases from escaping due to excessively high temperatures in the molten glass. Microbubbles are formed by precipitation, effectively reducing bubble defects on the photovoltaic glass panel. When the temperature inside the main body 6 of the horizontal passage drops back to the normal range set by the process, the control system reduces the opening of the electric discharge valve 12 accordingly to maintain a stable temperature and pressure field inside the cooling section, ensuring the uniformity and stability of the glass liquid cooling homogenization process. The triangular support structure formed by the inclined support plate 14 and the bottom connecting plate 15 of the connecting frame 4 can effectively resist the continuous impact of high-temperature flue gas and the mechanical vibration generated during the operation of the kiln, preventing the flue gas diversion structure 3 from tilting, loosening or falling off, and ensuring the long-term stable and reliable operation of the device.

[0023] In addition, the top pedal 10 is made of high-temperature resistant stainless steel, which has good heat resistance, corrosion resistance and structural strength. It can withstand high-temperature flue gas radiation and personnel trampling load for a long time. Its honeycomb hole diameter is set to 8mm to 12mm, which can not only ensure the normal flow of flue gas, but also effectively intercept condensate particles with a diameter greater than 8mm. The flue gas diversion bend 11 is made of high-temperature resistant alloy steel pipe, which can withstand the long-term scouring of high-temperature flue gas and is not easy to deform and crack. The pipe diameter must be adapted to the diameter of the observation port pipe 7 to ensure that the flue gas diversion flow is stable and controllable. The electric exhaust valve 12 is a high-temperature resistant electric butterfly valve with excellent sealing performance and fast response speed. It can accurately adjust the opening in high-temperature environment to realize real-time dynamic control of flue gas emission. The temperature sensor adopts thermocouple sensor, and multiple sensors can be set. They are installed in the main body 6 of the horizontal passage near the observation port pipe 7, above the glass liquid surface and in the main flue gas channel. Multi-point real-time collection of temperature data in different areas ensures comprehensive and accurate temperature monitoring and provides reliable data support for the linkage control of the electric exhaust valve 12.

[0024] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A flue gas diversion device for the cooling section of a photovoltaic glass furnace, comprising a transverse passage structure (1) of the furnace, characterized in that: A pedestrian walkway structure (2) is fixedly installed above the horizontal passage structure (1) of the kiln. The pedestrian walkway structure (2) consists of a supporting grid plate (8), a connecting support plate (9), and a top step plate (10). A flue gas diversion structure (3) is fixedly installed on the side of the horizontal passage structure (1) through a connecting pipe clamp (5). The flue gas diversion structure (3) is also fixedly connected to the pedestrian walkway structure (2) through two connecting fixing brackets (4). The flue gas diversion structure (3) consists of a flue gas diversion bend (11), an electric discharge valve (12), and a large-diameter cone pipe (13). The electric discharge valve (12) is fixedly installed at the upper end of the flue gas diversion bend (11), and the large-diameter cone pipe (13) is fixedly installed at the upper end of the electric discharge valve (12). The upper end of the large-diameter cone pipe (13) faces the pedestrian walkway structure (2).

2. The flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 1, characterized in that: The kiln transverse passage structure (1) includes a transverse passage body (6) and an observation port pipe (7). The observation port pipe (7) is inserted into the side wall of the transverse passage body (6). The observation port pipe (7) is fixedly connected to the transverse passage body (6) by bolts. A temperature sensor is installed inside the transverse passage body (6).

3. The flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 2, characterized in that: The pedestrian walkway structure (2) has several connecting support plates (9) that are evenly installed at the lower end of the supporting grid plate (8). Several connecting support plates (9) are also evenly installed at the upper end of the horizontal passage body (6). The connecting support plates (9) are fixedly connected to the supporting grid plate (8) and the horizontal passage body (6) by welding.

4. The flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 3, characterized in that: The top pedal (10) of the pedestrian walkway structure (2) has honeycomb holes, and the top pedal (10) is fixedly installed on the upper end of the supporting grid plate (8) by bolts.

5. A flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 4, characterized in that: The electric discharge valve (12) on the flue gas diversion structure (3) is fixedly connected to the flue gas diversion bend (11) and the large-diameter cone pipe (13) by bolts.

6. The flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 5, characterized in that: The lower part of the flue gas diversion bend (11) on the flue gas diversion structure (3) is fitted onto the observation port pipe (7) on the kiln horizontal passage structure (1), and the large-diameter cone pipe (13) is located below the connecting support plate (9) on the pedestrian walkway structure (2).

7. A flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 6, characterized in that: The connecting fixing frame (4) consists of an inclined support plate (14) and a bottom connecting plate (15). The lower end of the inclined support plate (14) is fixedly installed on the upper outer wall of the flue gas diversion bend (11) by welding. The upper end of the inclined support plate (14) is fixedly installed on the lower end of the bottom connecting plate (15) by welding. The bottom connecting plate (15) is fixedly installed on the lower end of the support grid plate (8) by welding.

8. A flue gas diversion device for the cooling section of a photovoltaic glass furnace according to claim 7, characterized in that: The connecting clamp (5) consists of two metal fixing half-rings (16) and two semi-annular heat-insulating ceramic limiting liners (17). The two metal fixing half-rings (16) are bolted together to form a ring, which is fitted onto the lower part of the flue gas diversion bend (11). The two semi-annular heat-insulating ceramic limiting liners (17) are respectively fixedly installed on the inner walls of the two metal fixing half-rings (16), and the semi-annular heat-insulating ceramic limiting liners (17) are also tightly attached to the outer wall of the flue gas diversion bend (11).

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