Physical oxygenation, decoloration and clarification system for ultra-white glass

Abstract

The utility model relates to the field of glass manufacturing, in particular to an ultra-white glass physical oxygenation, decoloration and clarification system which comprises a melting furnace, a bubbling gun is embedded in the bottom of the melting furnace, the bubbling gun is of a three-layer sleeve structure, air passes through the center of the bubbling gun, water is fed into the outermost cavity, the top end of the second-layer cavity is communicated with the outermost cavity in series, and water passes through the second-layer cavity. A water inlet, an air inlet and a water outlet are formed in the bottom end of the bubbling gun, the water inlet and the water outlet of the bubbling gun are communicated through a cooling water system, and the air inlet of the bubbling gun is connected with an air inlet system. The physical oxygenation, decoloration and clarification system for the ultra-white glass can stabilize liquid flow, increase mechanical stirring to promote glass melting and improve the melting rate, on the other hand, high-concentration oxygen is directly introduced into the melting furnace in a physical mode and is in full contact with molten glass in the melting furnace, so that the high-concentration oxygen can partially replace variable-valence oxides, the use amount of a defoaming agent is reduced, and the production cost is reduced. Clarification of molten glass is accelerated, the light transmittance of the glass is improved, and the production cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of glass manufacturing, specifically to a physical oxygenation, decolorization, and clarification system for ultra-white glass. Background Technology

[0002] Glass melting furnaces are key thermal equipment in glass manufacturing used to melt glass batches. The process involves feeding a uniformly mixed batch (including a certain amount of crushed glass clinker) into the furnace, where it undergoes complex physicochemical reactions during high-temperature melting, refining, and cooling to obtain molten glass that meets forming requirements. To improve thermal energy utilization, bottom bubbling technology is commonly used in domestic glass melting furnaces. This technology involves installing a row of bubbling pipes at the furnace's hot spring to introduce gas into the molten glass, enhancing the thermal barrier effect. Due to the strengthened thermal barrier, convection in the molten glass intensifies, significantly increasing the temperature of the molten glass at the bottom of the melting pool. This stabilizes the flow and promotes the melting of the batch.

[0003] Photovoltaic glass is a crucial component of photovoltaic (PV) modules. Low-iron-content ultra-clear glass is required as the cover glass for PV cells to increase sunlight transmittance, improve photoelectric conversion efficiency, and ultimately enhance PV power generation efficiency. During the melting of ultra-clear glass in the furnace, its low iron content results in high heat permeability, a minimal temperature gradient between the upper and lower layers of the furnace, and weak convection of the molten glass. Traditional bubbling techniques use dehydrated, ambient-temperature compressed air, which can enhance glass convection and improve clarification efficiency, but the effect is limited. Furthermore, the melting process of ultra-clear glass produces a lot of foam, leading to slow clarification, necessitating the additional spraying of defoamers to accelerate clarification.

[0004] Therefore, it is necessary to provide a physical oxygenation, decolorization, and clarification system for ultra-white glass to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a physical oxygenation, decolorization and clarification system for ultra-white glass.

[0006] This utility model provides a physical oxygenation, decolorization, and clarification system for ultra-white glass, including a melting furnace. A bubbling gun is embedded in the bottom of the melting furnace. The bubbling gun has a three-layer sleeve structure, with a hollow center for air circulation, an outermost cavity for water supply, and a second cavity at the top connected to the outermost cavity for water return. The bottom of the bubbling gun is provided with a water inlet, an air inlet, and a drain outlet. The water inlet and drain outlet of the bubbling gun are connected through a cooling water system, and the air inlet of the bubbling gun is connected to an air intake system.

[0007] Preferably, the air intake system includes an oxygen generator, a pressure regulating valve group, a gas distribution cabinet, oxygen branch pipes, and a safety compressed air pipe. The oxygen produced by the oxygen generator goes to the gas distribution cabinet through the pressure regulating valve group. The gas distribution cabinet is equipped with N oxygen branch pipes at its outlet end. Each oxygen branch pipe is located below each bubble gun. Each oxygen branch pipe is equipped with a three-way valve group. After the gas passes through the three-way valve group, one path is connected to the air intake interface of the bubble gun through a metal hose, and the other path is connected to the safety compressed air pipe after another valve.

[0008] Preferably, the air intake system further includes an air storage tank, the air intake end of which is connected to the air outlet end of the oxygen generator, the air outlet end of which is connected to the air intake end of the pressure regulating valve group, and a valve is provided at the air outlet end of the air storage tank.

[0009] Preferably, the inlet and outlet of the bubbling gun are both connected to a metal hose, the metal hose is equipped with a valve, and the ends of the metal hoses at the inlet and outlet are respectively connected to a water supply column and a water return column, and a water supply pipe and a water return pipe are respectively installed on the water supply column and the water return column.

[0010] Preferably, the cooling water system includes a pipeline connecting the supply water pipe and the return water pipe, and a rising stem gate valve, a filter, a booster pump, a check valve, a rising stem gate valve, a pressure gauge, a pressure transmitter, and a temperature gauge are installed sequentially on the pipeline. The check valve and the booster pump are connected by a pressure transmitter through a ball valve.

[0011] Preferably, the pool furnace section of the melting furnace includes pool walls located around the melting furnace, large clay bricks at the bottom of the pool, a ramming material layer above the large clay bricks, AZS paving bricks above the ramming material layer, bottom insulation below the large clay bricks, a secondary beam below the bottom insulation, and a main beam below the secondary beam. The bubbling gun passes sequentially through the bottom insulation, the large clay bricks, the ramming material layer, and the AZS paving bricks, and is inserted into the molten glass inside the furnace, so that the bubbling nozzle at the top of the bubbling gun extends a certain distance beyond the AZS paving bricks.

[0012] Preferably, the bubble gun is made of heat-resistant boiler steel or 316L stainless steel to ensure that it does not leak.

[0013] Preferably, the air entering the oxygen generator is compressed air at a certain pressure that has been dehydrated and deoiled from the air compression station, and this compressed air can be directly introduced into the gas distribution cabinet through a valve.

[0014] Preferably, a pool bottom stack brick is provided between the secondary beam and the large clay bricks at the bottom of the pool, a pool bottom steel platform is provided directly below the melting furnace, a kiln bottom column is fixed on the pool bottom steel platform, and a kiln bottom main beam is fixed on the top of the kiln bottom column.

[0015] Preferably, the top of the secondary beam is provided with a furnace column, the furnace column is equipped with a pool wall top screw, the end of the pool wall top screw is provided with a pool wall railing, the outer side of the pool wall is provided with pool wall insulation clay bricks and pool wall insulation calcium silicate board, and the pool wall railing is in contact with the pool wall insulation clay bricks and pool wall insulation calcium silicate board.

[0016] Compared with related technologies, the present invention provides the following beneficial effects:

[0017] By adding a new water-cooled bubbling system to the bottom of the glass melting furnace, it possesses all the advantages of the existing bubbling system. On the one hand, it stabilizes the liquid flow and promotes the melting of the batch material; on the other hand, it increases mechanical stirring to promote glass melting and improve the melting rate, while also reducing the unit energy consumption.

[0018] To accelerate the clarification of ultra-clear glass melt, traditional ultra-clear glass often uses variable-valence oxide clarifiers and decolorizing agents, such as cerium and antimony compounds. These clarifiers can both accelerate the clarification of the glass melt and aid in decolorization. The clarification process involves decomposition at a certain temperature, releasing oxygen, which then diffuses in the glass melt. Due to the principle of gas partial pressure, this oxygen permeates into bubbles or nuclei, causing them to grow and rise to the surface before being expelled. Alternatively, the glass melt absorbs or combines with the gas in the bubbles, reducing their size to below the critical bubble diameter and causing them to disappear, thus achieving the purpose of clarifying the glass melt. Chemical decolorization is based on the decomposition of the decolorizing agent at high temperatures, releasing oxygen, which then oxidizes the highly coloring Fe... 2+ (Blue) transforms into Fe 3+ (Yellow-green) FeO has a coloring ability approximately 10 times greater than Fe2O3 in the visible light range, which to some extent weakens the coloring of iron and increases the transparency of glass. However, variable-valence oxide clarifying and decolorizing agents are expensive and pollute the environment, keeping production costs high. Since high-concentration oxygen is directly introduced into the melting furnace in a physical manner, it fully contacts the molten glass inside, partially replacing the use of variable-valence oxides, reducing their usage, and also reducing the amount of defoamer needed. This accelerates the clarification of the molten glass, improves glass transmittance, and significantly reduces production costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall process of this utility model.

[0020] Figure 2 This is a schematic diagram of the kiln bottom installation of this utility model.

[0021] Figure 3 This is a schematic diagram of the connection of the metal hose of the bubble gun of this utility model.

[0022] Figure 4 This is a schematic diagram of the pressurization pump system of this utility model.

[0023] Figure 5 This is a schematic diagram of the oxygen supply system of this utility model;

[0024] Figure 6 This is a schematic diagram of the overall structure of this utility model.

[0025] Numbered in the diagram: 1. Bubble gun; 2. AZS paving bricks at the bottom of the pool; 3. Rammed earth layer at the bottom of the pool; 4. Large clay bricks at the bottom of the pool; 5. Stacked bricks at the bottom of the pool; 6. Insulation at the bottom of the pool; 7. Secondary beam; 8. Water supply column; 9. Water return column; 11. Steel platform at the bottom of the pool; 12. Furnace column; 13. Top screws on the pool wall; 14. Iron railings on the pool wall; 15. Pool wall; 16. Clay bricks for pool wall insulation; 17. Calcium silicate board for pool wall insulation; 18. 19. Kiln bottom main beam; 20. Kiln bottom column; 21. Water supply pipe; 22. Safety compressed air pipe; 23. Oxygen branch pipe; 24. Return water pipe; 25. Metal flexible hose; 26. Thermometer; 27. Pressure transmitter; 28. Pressure gauge; 29. ​​Rising stem gate valve; 30. Check valve; 31. Booster pump; 32. Filter; 33. Ball valve; 34. Oxygen generator; 35. Gas storage tank; 36. Pressure stabilizing valve assembly; 37. Gas distribution cabinet. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Please refer to the following: Figures 1 to 6 A physical oxygenation decolorization and clarification system for ultra-white glass, the core components of which include a carefully designed melting furnace and its matching bubbling gun 1, air intake system and cooling water system.

[0028] The melting furnace has a complex and intricate structure, with a bubbler lance 1 cleverly embedded in its bottom. This bubbler lance 1 employs a unique three-layer sleeve structure: the central layer is hollow and used to transport gas; the outermost cavity is responsible for water supply; and the second cavity at the top connects to the outermost cavity for water return. The bottom of the bubbler lance 1 is cleverly equipped with a water inlet, an air inlet, and a drain outlet. The water inlet and drain outlet are tightly connected through a sophisticated cooling water system to ensure water recycling; while the air inlet is closely connected to the air supply system to provide the necessary oxygen to the molten glass inside the melting furnace.

[0029] The air intake system (the factory has a compressed air station that specifically produces compressed air to supply the entire plant) is also very precisely designed. It includes an oxygen generator 33, a pressure regulating valve assembly 35, a gas distributor 36, oxygen branch pipes 22, and a safety compressed air pipe 21. The high-purity oxygen produced by the oxygen generator 33 is precisely regulated by the pressure regulating valve assembly 35 and then sent to the gas distributor 36. The outlet of the gas distributor 36 is cleverly equipped with N oxygen branch pipes 22, each precisely positioned below each bubbling gun 1, and the gas is distributed through a three-way valve assembly. One gas path connects to the air intake port of the bubbling gun 1 via a metal hose 24, providing oxygen to the molten glass in the furnace; the other gas path passes through a valve and connects to the safety compressed air pipe 21. In addition, the air intake system is equipped with a gas storage tank 34, located between the oxygen generator 33 and the pressure regulating valve assembly 35, serving as a temporary oxygen storage device, and controlling the oxygen output through a valve.

[0030] The inlet and outlet of the bubbling gun 1 are connected to the supply water column 8 and the return water column 9 via a metal flexible hose 24 with a valve. The supply water column 8 and the return water column 9 are in turn connected to the supply water pipe 20 and the return water pipe 23, respectively, forming a complete water circulation path. Along this path, a series of devices are cleverly installed, such as a rising stem gate valve 28, a filter 31, a booster pump 30, a check valve 29, a pressure gauge 27, a pressure transmitter 26, and a temperature gauge 25. These devices work together to ensure the efficient operation and safety of the cooling water system. The check valve 29 and the booster pump 30 are also cleverly connected to the pressure transmitter 26 via a ball valve 32 to monitor pressure changes within the pipeline in real time.

[0031] The furnace's structure is equally remarkable, comprising pool walls 15 on all four sides, large clay bricks 4 at the bottom, a ramming layer 3 above the clay bricks 4, AZS paving bricks 2 above the ramming layer 3, and bottom insulation 6 below the clay bricks 4. Below the insulation 6, secondary beams 7 and the main furnace bottom beam 18 are cleverly designed. The bubbling gun 1 passes through these layers sequentially from the bottom of the furnace, penetrating the molten glass inside. Its bubbling nozzle extends a certain distance beyond the AZS paving bricks 2 to ensure effective bubble generation and rise within the molten glass.

[0032] The bubbling gun 1 is made of high-performance materials such as heat-resistant boiler steel or 316L stainless steel to ensure its durability and sealing performance in high-temperature environments. In addition, the gas entering the oxygen generator 33 is compressed air from the compressed air station that has undergone dehydration and oil removal treatment, and this compressed air can be directly sent to the gas distribution cabinet 36 for distribution through valves.

[0033] To support the entire melting furnace and provide the necessary installation space, a steel platform 11 is cleverly installed directly beneath the furnace. The steel platform 11 is fitted with furnace bottom columns 19 and main furnace bottom beams 18, allowing the furnace to be suspended in mid-air. Simultaneously, furnace bottom columns 12 are also installed on the top of the secondary beams 7 to further support and secure the various parts of the furnace. Components such as furnace wall top screws 13 and furnace wall railings 14 are installed on the furnace bottom columns 12. These components are in close contact with the insulation materials on the outer side of the furnace wall 15, including the furnace wall insulation clay bricks 16 and the furnace wall insulation calcium silicate board 17, providing excellent insulation for the furnace and preventing the insulation materials from detaching.

[0034] When the bubbling system is initially started, the safety compressed air is turned on to protect the insertion port of the bubbling gun 1 and prevent the high-temperature molten glass from overflowing. At the same time, the compressed air valve and oxygen valve of the three-way valve group are opened, and the mixture of compressed air and oxygen is introduced into the melting furnace through the bubbling gun 1 to break up the stationary layer of molten glass at the bottom of the furnace pool, which facilitates the rise of bubbles, and the size and number of bubbles are adjusted. After adjustment, the safety compressed air is turned off, the compressed air valve of the three-way valve group is closed, and only the oxygen valve is opened to blow in oxygen bubbles of a certain concentration, quantity and size for normal production.

[0035] When the oxygen generator malfunctions, open the compressed air valve of the three-way valve group, close the oxygen valve, and repair the oxygen generator. At this time, ordinary compressed air will be blown into the kiln.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A system for physical oxygen-enhanced decolorization and clarification of ultra-white glass, characterized in that, The application relates to a bubble gun embedded in the bottom of a melting furnace, wherein the bubble gun is a three-layer sleeve structure, the center is hollow for air, the outermost cavity is for water feeding, the second layer cavity is communicated with the outermost cavity at the top end for backwater, the bottom end of the bubble gun is provided with a water inlet, an air inlet and a water outlet, the water inlet and the water outlet of the bubble gun are communicated through a cooling water system, and the air inlet of the bubble gun is connected with an air feeding system.

2. A system for decoloring and clarifying of ultra-white glass by physical oxygenation according to claim 1, characterized in that, The air feeding system comprises an oxygen generator (33), a pressure stabilizing valve group (35), a gas distribution cabinet (36), oxygen branch pipes (22) and security compressed air pipes (21), oxygen generated by the oxygen generator (33) passes through the pressure stabilizing valve group (35) to the gas distribution cabinet (36), the gas outlet end of the gas distribution cabinet (36) is provided with N oxygen branch pipes (22), each oxygen branch pipe (22) is arranged below each bubble gun (1), a three-way valve group is arranged on each oxygen branch pipe (22), after the gas passes through the three-way valve group, one way is connected to the air inlet interface of the bubble gun (1) through a metal hose (24), and the other way is connected to the security compressed air pipe (21) after being connected to another valve.

3. A system for decoloring and clarifying ultrawhite glass by physical oxygenation according to claim 2, characterized in that, The air feeding system further comprises a gas storage tank (34), the gas inlet end of the gas storage tank (34) is communicated with the gas outlet end of the oxygen generator (33), the gas outlet end of the gas storage tank (34) is communicated with the gas inlet end of the pressure stabilizing valve group (35), and a valve is arranged at the gas outlet end of the gas storage tank (34).

4. The system for decoloring and clarifying of ultra-white glass by physical oxygenation according to claim 1, characterized in that, The water inlet and the water outlet of the bubble gun (1) are connected with metal hoses (24), the metal hoses (24) are provided with valves, the water inlet and the water outlet are respectively connected with water feeding and backwater distribution columns (8) and (9) through the metal hoses (24), and water feeding pipes (20) and backwater pipes (23) are respectively arranged on the water feeding and backwater distribution columns (8) and (9).

5. A system for decoloring and clarifying ultrawhite glass by physical oxygenation according to claim 4, characterized in that, The cooling water system comprises a pipeline connected between the water feeding pipe (20) and the backwater pipe (23), and a clear rod gate valve (28), a filter (31), a pressure pump (30), a check valve (29), a clear rod gate valve (28), a pressure gauge (27), a pressure transmitter (26) and a temperature gauge (25) are sequentially arranged on the pipeline, and the check valve (29) and the pressure pump (30) are connected with the pressure transmitter (26) through a ball valve (32).

6. A system for decoloring and clarifying ultrawhite glass by physical oxygenation according to claim 4, characterized in that, The pool furnace part of the melting furnace comprises pool walls (15) located around the melting furnace, pool bottom clay big bricks (4) located at the bottom, a pool bottom rammed layer (3) located above the pool bottom clay big bricks (4), pool bottom AZS paving bricks (2) located above the pool bottom rammed layer (3), pool bottom insulation (6) located below the pool bottom clay big bricks (4), secondary beams (7) below the pool bottom insulation (6), a furnace bottom main beam (18) below the secondary beams (7), and the bubble gun (1) sequentially penetrates through the pool bottom insulation (6), the pool bottom clay big bricks (4), the pool bottom rammed layer (3) and the pool bottom AZS paving bricks (2) from the pool bottom, and is inserted into the glass liquid in the furnace, so that the top bubble opening of the bubble gun (1) exceeds the pool bottom AZS paving bricks (2) by a certain distance.

7. A system for decoloring and clarifying ultrawhite glass by physical oxygenation according to claim 2, characterized in that, The material of the bubble gun (1) is heat-resistant boiler steel or stainless steel 316L, which ensures no water leakage.

8. A system for decoloring and clarifying ultrawhite glass by physical oxygenation according to claim 2, characterized in that, The gas of the oxygen machine (33) is compressed air with certain pressure from the air compression station after dehydration and oil removal, and the compressed air can be directly introduced into the gas distribution cabinet (36) through a valve.

9. A system for decoloring and clarifying ultrawhite glass by physical oxygenation according to claim 6, characterized in that, The pool bottom brick (5) is arranged between the secondary beam (7) and the pool bottom clay big brick (4), the pool bottom steel platform (11) is arranged below the smelting furnace, the kiln bottom column (19) is fixed on the pool bottom steel platform (11), and the kiln bottom main beam (18) is fixed on the top of the kiln bottom column (19).

10. The system for decoloring and clarifying of ultra-white glass by physical oxygenation according to claim 6, characterized in that, The smelting furnace column (12) is arranged on the top of the secondary beam (7), the pool wall top wire (13) is arranged on the smelting furnace column (12), the pool wall rail iron (14) is arranged at the end of the pool wall top wire (13), the pool wall (15) is provided with the pool wall heat preservation clay board brick (16) and the pool wall heat preservation silica calcium board (17) on the outer side, and the pool wall rail iron (14) is in contact with the pool wall heat preservation clay board brick (16) and the pool wall heat preservation silica calcium board (17).

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