A float glass furnace insulation structure

Abstract

The utility model discloses a kind of float glass melting furnace heat preservation structures, including kiln top, kiln body, the kiln top is set in kiln body top, the kiln body inner wall one side is fixedly connected with kiln ridge, the kiln body inner wall bottom side is fixed with heat preservation tile, the kiln top bottom side is embedded and fixed with heat preservation composite layer, maintain the temperature of pool bottom glass liquid, prevent its solidification, and promote the good convection of pool bottom glass liquid, beneficial to bubble discharge and chemical homogenization, while significantly reduce the heat loss of pool bottom to base, on the only way of heat transfer, set by nano microporous material and static air layer, almost insurmountable multiple thermal barrier, while through integration and stress buffer design, ensure that this high-efficiency heat preservation capacity can be long-term, stably maintained under the harsh environment of melting furnace.

Description

Technical Field

[0001] This utility model relates to the field of furnace technology in the glass manufacturing industry, and more specifically, to a heat preservation structure for a float glass melting furnace. Background Technology

[0002] The float glass melting furnace is the core thermal equipment in glass production, with internal temperatures exceeding 1500℃. Effective heat preservation of the furnace is a crucial technical aspect, aimed at reducing heat loss, lowering production costs, improving the working environment, and stabilizing the melting process. The furnace's insulation structure is primarily applied to the arch, breast wall, tank walls, and tank bottom.

[0003] In existing technologies, traditional insulation materials (such as ordinary insulating bricks) have relatively high thermal conductivity, and the insulation layer design is simple, making it difficult to form an effective thermal resistance gradient. This results in persistently high surface temperatures in the kiln, especially on the outer surface of the large arch, which often exceeds 200°C. The base temperature at the bottom of the pool also remains at a high level, causing a huge waste of energy. The interlayer connections of traditional pool bottom insulation structures are weak, and under the long-term action of static pressure and thermal stress from molten glass, uneven settlement and compression are likely to occur, leading to cracks in the refractory bricks of the upper working layer. This accelerates the erosion and penetration of molten glass into the bottom of the pool, posing a risk of leakage.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a heat preservation structure for float glass melting furnaces to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows: A heat preservation structure for a float glass melting furnace includes a furnace roof and a furnace body. The furnace roof is located on top of the furnace body. A furnace sill is fixedly connected to one side of the inner wall of the furnace body. Heat-insulating floor bricks are laid and fixed on the bottom side of the inner wall of the furnace body. A heat-insulating composite layer is embedded and fixed on the bottom side of the furnace roof.

[0007] Preferably, the thermal insulation composite layer includes an upper arch brick, an outer arch brick, and supporting bricks. The upper arch bricks are laid and fixed between the outer arch bricks in sequence, and the supporting bricks are respectively installed on the bottom side of the outer wall of the outer arch bricks. Nanoporous plate bricks are laid in sequence on the top side of the upper arch bricks.

[0008] Preferably, the nanoporous bricks and the top arch bricks are staggered, and inner arch bricks are respectively provided on both sides of the top of the nanoporous bricks. Insulating bricks are laid between the inner arch bricks, and refractory fiber blankets are laid on the top side of the insulating bricks.

[0009] Preferably, the kiln body includes bottom bricks and wall bricks, with the bottom bricks laid at the bottom between the wall bricks, and the outer and inner walls of the bottom bricks and wall bricks respectively provided with foundation steel plates.

[0010] Preferably, the bottom bricks of the pool are installed at equal intervals on the top side of the foundation steel plate, the top side of the bottom bricks is covered with refractory bricks, the top side of the refractory bricks is covered with refractory mortar, the top side of the refractory mortar is embedded with rhomboid base grooves at equal intervals, and the heat-insulating floor bricks are respectively installed inside the rhomboid base grooves.

[0011] Preferably, the heat-insulating floor tile includes a rhombus-shaped hollow brick, a bottom cover, and a top cover. The bottom cover is disposed on the bottom side of the rhombus-shaped hollow brick, and the top cover is disposed on the top of the rhombus-shaped hollow brick. The bottom cover is embedded and fixed inside the rhombus-shaped base groove.

[0012] Preferably, the bottom side of the upper end cover is fixedly connected with refractory castable, and the top side of the bottom end cover is fixedly connected with refractory sealant. The upper end cover and the bottom end cover are respectively fixed by refractory castable and refractory sealant, and the interior of the rhomboid hollow brick is filled with nanoporous heat insulation core brick.

[0013] Preferably, the diameter of the nanoporous heat-insulating core brick matches the cavity of the rhomboid hollow brick, and the height of the nanoporous heat-insulating core brick occupies half of the cavity.

[0014] The beneficial effects of this invention are as follows: it maintains the temperature of the molten glass at the bottom of the tank, prevents it from solidifying, and promotes good convection of the molten glass at the bottom of the tank, which is conducive to the discharge of bubbles and chemical homogenization. At the same time, it significantly reduces the heat loss from the bottom of the tank to the foundation. On the inevitable path of heat transfer, a nearly insurmountable multi-layer thermal barrier composed of nanoporous materials and static air layers is set up. At the same time, through the integrated and stress buffer design, it ensures that this efficient heat preservation capability can be maintained stably for a long time in the harsh environment of the melting furnace. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. 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 the overall structure of a float glass melting furnace insulation structure according to an embodiment of the present utility model; Figure 2 This is a schematic cross-sectional view of the composite insulation layer of a float glass melting furnace insulation structure according to an embodiment of the present utility model. Figure 3This is a schematic diagram of the kiln body cross-section structure of a float glass melting furnace insulation structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the disassembled structure of the insulation bricks in a float glass melting furnace insulation structure according to an embodiment of the present utility model.

[0017] In the picture: 1. Kiln roof; 2. Kiln body; 3. Kiln sill; 4. Insulating floor bricks; 5. Insulating composite layer; 6. Upper arch bricks; 7. Outer arch bricks; 8. Supporting bricks; 9. Nano-microporous plate bricks; 10. Inner arch bricks; 11. Insulating bricks; 12. Refractory fiber blanket; 13. Pool bottom bricks; 14. Pool wall bricks; 15. Foundation steel plate; 16. Pool bottom slab bricks; 17. Refractory brick body; 18. Refractory mortar; 19. Rhomboid hollow bricks; 20. Bottom cover; 21. Top cover; 22. Refractory castable; 23. Refractory sealant; 24. Nano-microporous insulating core bricks. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a heat preservation structure for a float glass melting furnace is provided.

[0020] Example 1 like Figure 1-4As shown, a float glass melting furnace insulation structure according to an embodiment of the present invention includes a furnace roof 1 and a furnace body 2. The furnace roof 1 is located on top of the furnace body 2. A furnace sill 3 is fixedly connected to one side of the inner wall of the furnace body 2. Insulating floor bricks 4 are laid and fixed on the bottom side of the inner wall of the furnace body 2. An insulating composite layer 5 is embedded and fixed on the bottom side of the furnace roof 1. The insulating composite layer 5 includes upper arch bricks 6, outer arch bricks 7, and supporting bricks 8. The upper arch bricks 6 are laid and fixed between the outer arch bricks 7. The supporting bricks 8 are respectively installed on the bottom side of the outer wall of the outer arch bricks 7. Nanoporous plate bricks 9 are laid on the top side of the upper arch bricks 6 in sequence. The nanoporous plate bricks 9 and the top side of the upper arch bricks 6 are staggered. Inner arch bricks 10 are respectively provided on both sides of the top of the nanoporous plate bricks 9. Insulating bricks 11 are laid between the inner arch bricks 10. With the refractory fiber blanket 12 laid out, when the furnace is ignited and the temperature inside the furnace rises to over 1500℃, the enormous heat will be transferred to the main arch brick layer through thermal radiation, conduction and convection. The heat attempts to dissipate outward, but when it reaches the nanoporous brick 9, it encounters great resistance. Due to its extremely low thermal conductivity, the nanoporous material becomes a strong thermal barrier, causing most of the heat to be blocked and reflected back into the furnace. The insulating brick and flexible refractory fiber blanket further increase the total thermal resistance, ensuring that the temperature of the outer surface of the furnace is reduced to the minimum. Through multi-layer insulation, the heat loss from the surface of the furnace is greatly reduced, directly saving fuel. The significant reduction in the outer surface temperature protects the steel structure around the furnace from losing strength due to overheating, extending the overall life of the furnace.

[0021] Example 2 like Figure 1-4As shown, a float glass melting furnace insulation structure according to an embodiment of the present invention includes a furnace roof 1 and a furnace body 2. The furnace roof 1 is located on top of the furnace body 2. A furnace sill 3 is fixedly connected to one side of the inner wall of the furnace body 2. Insulating floor bricks 4 are laid and fixed on the bottom side of the inner wall of the furnace body 2. An insulating composite layer 5 is embedded and fixed on the bottom side of the furnace roof 1. The furnace body 2 includes bottom bricks 13 and wall bricks 14. The bottom bricks 13 are laid at the bottom between the wall bricks 14. Foundation steel plates 15 are respectively provided on the outer and inner walls of the bottom bricks 13 and wall bricks 14. Bottom bricks 16 are installed at equal intervals on the top side of the foundation steel plates 15. Refractory bricks 17 are laid on the top side of the bottom bricks 16. Refractory mortar 18 is laid on the top side of the refractory bricks 17. Rhomboid base grooves are embedded at equal intervals on the top side of the refractory mortar 18. Insulating floor bricks 4 are respectively installed inside the rhomboid base grooves. The heat inside the kiln and the main arch bricks are transferred upwards through heat conduction. The multi-layer thermal insulation composite material together establishes a huge thermal resistance, especially the high-efficiency insulation layer, which can greatly slow down the heat loss to the outside. The heat of the molten glass and the refractory bricks on the working surface of the pool bottom are conducted downwards. The brick structure creates a stable air insulation layer. The foundation steel plate 15 is the foundation of the entire pool bottom. The pool bottom bricks are installed on it at equal intervals to form support points and air insulation channels. The lower layer of refractory bricks is laid on the bricks to form the main structure of the pool bottom. Refractory mortar is used to level the surface on this structural layer and thermal insulation bricks 4 are laid on it. Through effective insulation, the temperature of the molten glass at the bottom of the pool is maintained, preventing it from solidifying and promoting good convection of the molten glass at the bottom of the pool. This is conducive to the discharge of bubbles and chemical homogenization, while significantly reducing the heat loss from the bottom of the pool to the foundation.

[0022] Example 3 like Figure 1-4As shown, a float glass melting furnace insulation structure according to an embodiment of the present invention includes a furnace roof 1 and a furnace body 2. The furnace roof 1 is located on top of the furnace body 2. A furnace sill 3 is fixedly connected to one side of the inner wall of the furnace body 2. Insulating floor bricks 4 are laid and fixed on the bottom side of the inner wall of the furnace body 2. An insulating composite layer 5 is embedded and fixed on the bottom side of the furnace roof 1. The insulating floor bricks 4 include rhomboid hollow bricks 19, bottom end caps 20, and top end caps 21. The bottom end caps 20 are located on the bottom side of the rhomboid hollow bricks 19, and the top end caps 21 are located on the top of the rhomboid hollow bricks 19. The bottom end caps 20 are respectively embedded in the rhomboid base groove. The upper end cover 21 is fixedly connected to the bottom side with refractory castable 22, and the bottom end cover 20 is fixedly connected to the top side with refractory sealant 23. The upper end cover 21 and the bottom end cover 20 are respectively engaged and fixed by refractory castable 22 and refractory sealant 23. The interior of the rhomboid hollow brick 19 is filled and fixed with nanoporous heat-insulating core brick 24. The diameter of the nanoporous heat-insulating core brick 24 matches the cavity of the rhomboid hollow brick 19, and the height of the nanoporous heat-insulating core brick 24 occupies half of the cavity. Heat is conducted from the glass melt at about 1500°C above to the working layer at the bottom of the pool. The refractory bricks then reach the upper cover 21 of this insulating floor tile. The refractory shell, nano-core bricks, air, and sealing material begin to expand uniformly due to heat. The semi-filled design provides space for the thermal expansion of the nano-microporous insulating core bricks 24, preventing them from being crushed. The heat attempts to conduct downwards through the upper cover, refractory castable, nano-microporous insulating core bricks, static air layer, bottom cover, and pool bottom foundation. Through the nano-microporous core bricks and static air layer, a sharp temperature gradient from high to low temperature is formed in the vertical direction, thereby achieving an ultimate insulation effect. Temperature and heat loss at the bottom of the furnace are minimized. The brickwork becomes a sturdy fortress by the interlocking and fixing of refractory castable 22 and refractory sealant 23. It can withstand the static pressure of the molten glass and refractory material above and maintain its own structure without damage when the furnace body is slightly deformed. On the inevitable path of heat transfer, a near-insurmountable multi-layer thermal barrier composed of nanoporous materials and static air layers is set up. At the same time, through the integrated and stress buffer design, this efficient heat preservation capacity can be maintained stably for a long time in the harsh environment of the melting furnace.

[0023] In summary, with the help of the above-mentioned technical solution of this utility model, when the furnace is ignited and heated, and the temperature inside the furnace rises to above 1500℃, a huge amount of heat will be transferred to the main arch brick layer through thermal radiation, conduction, and convection. The heat attempts to dissipate outwards, but when it reaches the nanoporous plate brick 9, it encounters great resistance. The heat inside the furnace and the main arch brick are transferred upwards through heat conduction. The multi-layer thermal insulation composite material together establishes a huge thermal resistance, especially the high-efficiency thermal insulation layer, which can greatly slow down the heat loss to the outside. The heat of the molten glass and the refractory bricks on the working surface of the pool bottom are conducted downwards. The slab brick structure creates a stable air insulation layer. The base steel plate 15 is the foundation of the entire pool bottom. Slab bricks are installed on it at equal intervals to form support points and air insulation channels. The lower layer of refractory bricks is laid on top of the slab bricks. The main structure forming the bottom of the pool is leveled with refractory mortar and insulated floor bricks 4. Through effective insulation, the temperature of the molten glass at the bottom of the pool is maintained, preventing it from solidifying. Heat is conducted from the molten glass at approximately 1500°C above to the refractory bricks of the working layer at the bottom of the pool, and then to the upper end cap 21 of this insulated floor brick. The refractory shell, nano-core brick, air, and sealing material begin to expand uniformly due to heat. The semi-filled design provides space for the thermal expansion of the nano-microporous insulating core brick 24, preventing it from being crushed. The heat attempts to be conducted downwards through the upper end cap, refractory castable, nano-microporous insulating core brick, static air layer, bottom end cap, and pool bottom foundation. Through the nano-microporous core brick and static air layer, a sharp temperature gradient from high temperature to low temperature is formed in the vertical direction, thereby achieving the ultimate insulation effect.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat preservation structure for a float glass melting furnace, comprising a furnace roof (1) and a furnace body (2), characterized in that, The kiln top (1) is set on the top of the kiln body (2). A kiln sill (3) is fixedly connected to one side of the inner wall of the kiln body (2). Insulating bricks (4) are laid and fixed on the bottom side of the inner wall of the kiln body (2). An insulating composite layer (5) is embedded and fixed on the bottom side of the kiln top (1).

2. The heat preservation structure for a float glass melting furnace according to claim 1, characterized in that, The thermal insulation composite layer (5) includes an upper arch brick (6), an outer arch brick (7), and a support brick (8). The upper arch brick (6) is laid and fixed between the outer arch bricks (7) in sequence. The support bricks (8) are installed on the bottom side of the outer wall of the outer arch brick (7). The top side of the upper arch brick (6) is laid with nano-microporous plate bricks (9).

3. The heat preservation structure for a float glass melting furnace according to claim 2, characterized in that, The nanoporous bricks (9) and the upper arch bricks (6) are staggered on the top side. Inner arch bricks (10) are respectively provided on both sides of the top of the nanoporous bricks (9). Insulating bricks (11) are laid between the inner arch bricks (10). Refractory fiber blankets (12) are laid on the top side of the insulating bricks (11).

4. The heat preservation structure for a float glass melting furnace according to claim 3, characterized in that, The kiln body (2) includes bottom bricks (13) and wall bricks (14). The bottom bricks (13) are laid at the bottom between the wall bricks (14), and the outer and inner walls of the bottom bricks (13) and wall bricks (14) are respectively provided with foundation steel plates (15).

5. The heat preservation structure for a float glass melting furnace according to claim 4, characterized in that, The base steel plate (15) is equidistantly installed with bottom bricks (16) on the top side. The bottom bricks (16) are covered with refractory bricks (17) on the top side. The refractory bricks (17) are covered with refractory mortar (18) on the top side. The refractory mortar (18) is equidistantly embedded with rhomboid base grooves on the top side. The heat-insulating floor tiles (4) are installed inside the rhomboid base grooves.

6. The heat preservation structure for a float glass melting furnace according to claim 5, characterized in that, The heat-insulating floor tile (4) includes a rhombus hollow brick (19), a bottom cover (20), and an upper cover (21). The bottom cover (20) is located on the bottom side of the rhombus hollow brick (19), and the upper cover (21) is located on the top of the rhombus hollow brick (19). The bottom cover (20) is embedded and fixed inside the rhombus base groove.

7. The heat preservation structure for a float glass melting furnace according to claim 6, characterized in that, The bottom side of the upper end cover (21) is fixedly connected with refractory castable (22), and the top side of the bottom end cover (20) is fixedly connected with refractory sealant (23). The upper end cover (21) and the bottom end cover (20) are respectively fixed by refractory castable (22) and refractory sealant (23). The interior of the rhomboid hollow brick (19) is filled with nanoporous heat insulation core brick (24).

8. The heat preservation structure for a float glass melting furnace according to claim 7, characterized in that, The diameter of the nanoporous heat insulation core brick (24) matches the cavity of the rhombic hollow brick (19), and the height of the nanoporous heat insulation core brick (24) occupies half of the cavity.

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