CN111763000A - Large arch structure of large-scale total oxygen combustion glass kiln - Google Patents
Large arch structure of large-scale total oxygen combustion glass kiln Download PDFInfo
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- CN111763000A CN111763000A CN202010369452.2A CN202010369452A CN111763000A CN 111763000 A CN111763000 A CN 111763000A CN 202010369452 A CN202010369452 A CN 202010369452A CN 111763000 A CN111763000 A CN 111763000A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 39
- 239000011521 glass Substances 0.000 title claims abstract description 35
- 239000001301 oxygen Substances 0.000 title claims description 22
- 229910052760 oxygen Inorganic materials 0.000 title claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 20
- 239000011449 brick Substances 0.000 claims abstract description 198
- 238000002844 melting Methods 0.000 claims abstract description 22
- 230000008018 melting Effects 0.000 claims abstract description 21
- 239000000446 fuel Substances 0.000 claims abstract description 12
- 210000000481 breast Anatomy 0.000 claims description 28
- 229910052593 corundum Inorganic materials 0.000 claims description 17
- 239000010431 corundum Substances 0.000 claims description 17
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 22
- 238000007789 sealing Methods 0.000 abstract description 21
- 239000011819 refractory material Substances 0.000 abstract description 13
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 239000003566 sealing material Substances 0.000 description 10
- 238000004321 preservation Methods 0.000 description 9
- 101150097977 arch-1 gene Proteins 0.000 description 8
- 238000009413 insulation Methods 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 239000003513 alkali Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 206010022000 influenza Diseases 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
Abstract
The large arch structure of the large-scale oxy-fuel combustion glass kiln comprises a front large arch and a rear large arch, wherein the front large arch and the rear large arch are respectively composed of multi-ring large arch bricks, each ring of large arch bricks of the front large arch are sequentially arranged and composed of arch bricks, flow guide bricks are arranged on two sides of each arch brick, arch ballast bricks are arranged on two sides of each flow guide brick, the rear large arch is composed of the multi-ring large arch bricks, and each ring of large arch bricks is sequentially arranged and composed of arch bricks. The invention can save money, improve the overall safety and economy of the kiln, reduce the erosion of refractory materials, prolong the service life of the kiln, improve the sealing effect of the kiln, improve the quality of the kiln and realize the use of the electric melting arch structure in the second kiln stage by optimizing the distribution of the arch materials and reasonably arranging the arch structure.
Description
Technical Field
The invention relates to the technical field of glass kilns, in particular to a large arch structure of a large-scale total oxygen combustion glass kiln.
Background
In the total oxygen combustion kiln, oxygen is used for supporting combustion instead of air. Compared with the air combustion process, about 79 percent of nitrogen in the air does not participate in the combustion any more, and no nitrogen exists in the flue gas, so that the energy is saved, the consumption is reducedReduce NOXThe glass is discharged, the total oxygen combustion does not need to be carried out, the flame is stable, the flame temperature is high, the fuel combustion is complete, and the melting of the glass and the yield improvement are facilitated.
After the total oxygen combustion technology is adopted, the gas composition in the kiln changes obviously, the water vapor content in the combustion products can reach more than 50%, the water vapor can react with sodium oxide in the glass melt to generate a large amount of sodium hydroxide, so that the volume concentration of alkali volatile matters is greatly increased, the great alkali vapor concentration can cause the crown refractory material to be seriously eroded, and the service life of the big crown is shortened. The main crown surface area accounts for more than 70% of the whole flame space surface area and is also the key part for heat dissipation control, so that the main crown structure, material, heat preservation and the like need to be reasonably selected and designed, and the economical efficiency is considered.
At present, the structural design of a domestic large-scale total oxygen combustion glass kiln is still in a groping and lifting stage, a mature case is not provided basically, particularly, the selection of a main crown structure is not basically separated from the thinking scope of an air kiln, only the material is upgraded, and the economical efficiency and the balance of refractory materials of all parts cannot be considered. The existing crown of the total oxygen combustion glass kiln partially uses high-quality silica bricks, although the refractoriness is improved to a certain extent, the properties of the silica bricks determine that the silica bricks are not suitable for a larger alkali steam atmosphere, the corrosion of the silica bricks can be accelerated, perforations are easy to form, the service life of the crown is shortened, and the kiln has certain hidden troubles in safety. After the electric melting refractory materials such as alpha beta alumina bricks and the like are used, expansion joint structures and heat preservation structures matched with the electric melting refractory materials cannot be arranged, and the use and energy-saving effect of the electric melting material in the second kiln stage of the crown are not fully considered.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a large arch structure of a large oxy-fuel combustion glass kiln, which can save funds, improve the overall safety and economy of the kiln, reduce the corrosion of refractory materials, prolong the service life of the kiln, improve the sealing effect of the kiln, improve the quality of the kiln and realize the use of the large arch structure for electric melting in the second kiln period by optimizing the distribution of the material of the large arch and reasonably arranging the large arch structure.
In order to achieve the purpose, the invention adopts the technical scheme that:
the large arch structure of the large-scale oxy-fuel combustion glass kiln comprises a front main arch 1 and a rear main arch 2, wherein the front main arch 1 and the rear main arch 2 are respectively composed of multi-ring main arch bricks, each ring of main arch bricks of the front main arch 1 are sequentially formed by arranging arch bricks 8, two sides of each arch brick 8 are provided with diversion bricks 7, two sides of each diversion brick 7 are provided with arch ballast bricks 6, the rear main arch 2 is composed of multi-ring main arch bricks, and each ring of main arch bricks is formed by sequentially arranging arch bricks 8.
The front main arch 1 is AZS zirconia corundum brick, and the rear main arch 2 is alpha beta corundum brick.
And 1-3 blocks are arranged on each side of the flow guide brick 7.
The front main arch 1 is a main arch electric melting brick, each ring of main arch bricks are formed side by side, and the cross section of a single main arch brick is in a trapezoid shape with a large upper part and a small lower part.
The upper part of the diversion brick 7 is of an arch brick structure, the lower part of the diversion brick is provided with a diversion structure 9 on the inner cambered surface along the longitudinal direction of the kiln, and the diversion structure 9 is of a prismatic structure protruding on the inner surface of the main arch brick.
The height of the flow guide structure 9 is selected to be 20-50 mm.
The lower part of the arch ballast brick 6 is provided with a breast wall brick 10, the upper part of the breast wall brick 10 is provided with a boss 11, the boss 11 is buckled with the arch ballast brick 6, and a gap is reserved between the breast wall brick 10 and the arch ballast brick 6.
And polycrystalline cellucotton 12 with high temperature resistance of 1600 ℃ is paved in the gap.
A groove is formed between each ring of main arch bricks, and cover seam bricks which are of T-shaped structures are arranged on the grooves.
And small expansion gaps are arranged among the arch bricks 8, cover gap bricks are arranged on the small expansion gaps, and the cover gap bricks are of T-shaped structures.
The upper surfaces of the front main arch 1 and the rear main arch 2 are provided with heat preservation layers, and the heat preservation layers are 5-7 layers.
The invention has the beneficial effects that:
the invention relates to a brand-new main arch structure design of a total oxygen combustion glass kiln, which adopts material layout of different parts, sets a main arch melt flow diversion structure, designs a sealing mode of arch slag bricks and a breast wall and a sealing mode of a main arch expansion joint matched with the main arch melt flow diversion structure, and is suitable for a heat insulation structure of the large total oxygen combustion glass kiln.
Drawings
FIG. 1 is a schematic diagram of the overall layout of the present invention.
FIG. 2 is a cross-sectional view of the main arch of the present invention.
Fig. 3 is a partial schematic view of fig. 2.
Fig. 4 is a schematic view of a centralized expansion joint.
FIG. 5 is a schematic view of a small expansion gap between single ring arches.
Fig. 6 is a schematic view of the structure of the cover seam brick.
Fig. 7 is a schematic structural view of the expansion joint and cover joint brick.
Fig. 8 is a schematic structural view of the small expansion joint and the cover joint brick.
FIG. 9 is a schematic view of the layout of the insulating layer.
FIG. 10 is a schematic view of the structure of the insulating layer.
FIG. 11 is a schematic view of the crown.
Fig. 12 is a sectional view of fig. 11 taken along line 1-1.
Fig. 13 is a cross-sectional view 2-2 of fig. 11.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A main arch structure suitable for a large-scale oxy-fuel combustion glass kiln comprises main arch materials and distribution, brick type selection, a main arch brick and breast wall brick 10 combination mode, a dilatation joint sealing mode and a main arch heat insulation layer.
Example 1
As shown in figure 1, the main arch is divided into a front main arch 1 and a rear main arch 2, the front main arch 1 of the kiln uses AZS zirconia corundum bricks, and the rear main arch 2 of the kiln uses alpha beta corundum bricks. A high-temperature melting zone is arranged between the two pairs of vertical flues, and a clarifying zone with lower temperature is arranged behind the vertical flues. The front high-temperature area is made of AZS zirconia corundum, so that the manufacturing cost can be reduced, the molten rungs generated by the main arches can be melted at high temperature after being dripped into the melting tank, the quality cannot be affected, the distance between the second group of main arches in the use area from the feeding port 3 to the front vertical flue 5 at the rear and the rear vertical flue 5 is kept by the group of main arches, and certain high-temperature melting time is provided after the molten rungs generated by the AZS main arches are dripped into the melting tank. The pure alpha beta corundum brick is selected and used in the clarifying area with lower rear temperature, so that the pollution to molten glass can be prevented.
As shown in fig. 2 and fig. 3, each ring of the main arch brick of the AZS zirconia corundum brick part at the front part of the main arch consists of arch slag bricks 6, diversion bricks 7 and arch bricks 8, the diversion bricks 7 are arranged at the positions, close to the arch slag bricks 6, of two sides of each ring of the main arch, and 1-3, preferably 2, bricks are arranged on each side. The large arch electric melting brick is formed by assembling single ring arches side by side, the cross section of a single arch brick is in a trapezoid shape with a large upper part and a small lower part, the upper part of the 7-shaped diversion brick is consistent with other arch bricks 8, a diversion structure 9 is arranged on an inner arc surface along the longitudinal direction of a kiln, the diversion structure 9 is in a ridge structure protruding on the inner surface of the large arch brick, and melts such as arch drops and the like are led into a high-temperature melting area in advance to be melted, so that the melts can be prevented from flowing onto the breast wall bricks 10 on two sides along the large arch, the height is selected to be 20-50 mm, preferably 30mm, the melts on the inner surface of the large arch brick can be prevented from flowing, and the flowing materials can be prevented from flowing over the diversion structure 9 due to the fact. The alpha beta corundum brick used in the rear main arch 2 area basically has no pollution to molten glass, a flow guide brick 7 is not required to be arranged, and the style of a conventional arch brick 8 is selected.
As shown in fig. 2 and fig. 3, a boss 11 is arranged on the upper portion of the breast wall brick 10 and is buckled with the arch ballast brick, a gap is reserved between the breast wall brick 10 and the arch ballast brick 6, the height of the gap between the breast wall brick 10 and the arch ballast brick 6 is selected according to the height of the breast wall brick, the expansion coefficient of a refractory material is consulted, when the breast wall brick 10 is higher, the gap height is properly selected, when the breast wall brick 10 is lower, the gap height is properly selected to be smaller, the value range is about 10mm to 20mm, and the expansion amount of the gap height is slightly larger than that of the breast wall brick 10. The horizontal distance between the arch ballast bricks 6 and the upper boss 11 of the breast wall brick 10 is about 10 mm. And polycrystalline fiber cotton 12 with high temperature resistance of 1600 ℃ is laid in a gap reserved between the breast wall brick 10 and the arch ballast brick 6, so that the sealing effect is further realized. The breast wall brick rises after the baking kiln, and the reserved gap between the breast wall brick 10 and the arch slag brick 6 can be tightly combined by utilizing the expansion of the brick body, so that the upper gap brick does not need to be purchased, the adjustment is not needed in the baking kiln process, the sealing is tight, the structure is compact, the maintenance is not needed in the later period, and the purchasing cost and the maintenance cost are reduced.
As shown in figures 4 to 10, the shape of the big arch brick at the position of the centralized expansion joint is arranged, and the big arch bricks at the two sides of the centralized expansion joint are respectively provided with a groove. Regarding the arrangement of the groove depth and the groove width, the groove depth is reasonably selected according to the thickness and the width of the main arch brick, the upper cover seam brick is easy to redden or burn, the groove depth can influence the strength of the main arch brick, and generally 50mm to 100mm is selected as the preferable value; similarly, the slot width should not be too large, which may affect the strength of the arch brick and may cause the risk of lateral twisting of the arch brick, and therefore, is generally selected to be between 50mm and 100 mm.
As shown in fig. 4 to 10, centralized expansion joint cover seam bricks are arranged, and the cover seam bricks consist of a part A and a part B. The width L1 of the part A of the cover gap brick is equal to the width of the arch brick slotting on both sides of the centralized expansion joint, and the height H1 is equal to the height of the arch brick slotting on both sides of the centralized expansion joint; the width L2 of the part B of the cover plate brick is the width of the centralized expansion joint plus the width of the grooves of the arch bricks on two sides, the width is properly widened by 10-20 mm on the basis, so that the groove part is completely sealed, the sealing materials are prevented from falling, and the height H2 is about half of the height H1.
In the large arch AZS brick part, the small expansion joint between the middle ring and the ring of each large arch is arranged by referring to the centralized expansion joint sealing structure, so that the size of the slot and the size of the cover plate brick are correspondingly reduced, and the sealing material is prevented from falling into the AZS material after the AZS material is contracted at 950-1150 ℃.
As shown in figures 4 to 10, the cover plate brick is placed in a slot at a main arch centralized expansion joint before the roasting kiln, and a small expansion joint between middle rings and rings of the AZS main arch is arranged according to the main arch centralized expansion joint.
As shown in FIGS. 9 to 13, the total oxygen combustion electrocast arch heat preservation layer is provided with 5-7 layers, preferably 6 layers. The layer 1 is a zirconium sealing material and plays a role in integral sealing; the 2 nd layer is made of hard refractory materials and plays a role in isolating heat, because the 2 nd layer is wrapped in the upper layer of heat insulation materials, if the light heat insulation bricks are used, creep deformation can occur quickly, and the main arch is caused to fire. The hard refractory material can be selected from first-grade high-alumina bricks or mullite bricks. 2-4 layers of light heat-insulating bricks can be selected above the 3 rd layer, and 3 layers are selected preferably to further play a role in heat insulation; the upmost layer is made of plastic sealing material, so that the outer layer is sealed and molded. It should be noted that the temperature of the inner and outer surfaces of each layer of the insulating layer is calculated by accounting when the thickness of the insulating layer is set, the temperature cannot exceed the refractoriness under load of the selected material, and the load of the arch per unit area is considered by accounting.
A large arch structure suitable for large-scale oxy-fuel combustion glass kiln comprises large arch materials and distribution, brick type selection, a large arch and breast wall brick combination mode, an expansion joint sealing mode and a large arch heat preservation layer.
The method comprises the following steps:
the material and layout of the crown are selected.
The combustion in the total oxygen combustion kiln can generate more than 50% of water vapor and larger alkali vapor concentration, so the crown material is made of the electro-melting refractory material. The AZS zirconia-corundum brick has high refractoriness, good erosion resistance and relatively low price, is a high-quality refractory material for a glass kiln, contains about 17 percent of glass phase, can seep at high temperature and can pollute glass liquid in a clarification area.
αβ corundum brick contains more than 94% of AL2O3，AL2O3The fused brick is saturated by sodium in the fusion casting process, is very stable to the action of alkali steam at high temperature, and has the best thermal stability in the fused brick, while the αβ corundum brick hardly contains a glass phase, does not pollute molten glass, but has higher unit price, and is a factor which needs to be considered.
The use stability and the economical efficiency of the material are comprehensively considered, the AZS zirconium corundum brick is used at the front part of the kiln, and the alpha beta corundum brick is used at the rear part of the kiln.
Step two:
and (4) selecting a brick type.
The powder flying at the front part of the furnace and the glass precipitated from the crown can form molten flow which flows down along the inner arc, scouring erosion is caused to the breast wall brick 10, the hook brick and the pool wall brick, the burning gun is coked, and the quality of the glass liquid is influenced. Therefore, flow guide bricks are arranged at the positions, close to the ballast bricks 6, of two sides of each ring of the main arch of the front AZS zirconia corundum brick, 1-3 flow guide bricks are arranged on each side of each flow guide brick 7, and the alpha-beta corundum bricks used by the rear main arch are in a conventional mode.
Step three:
the sealing mode of the arch ballast bricks 6 and the breast wall bricks 10 is set.
At present, the glass kiln mainly adopts an upper gap brick to seal an expansion joint between a arch ballast brick 6 and a breast wall brick 10, the upper gap brick needs to be processed with a certain inclination, the expansion amount needs to be noticed at any moment in the kiln baking process, and the upper gap brick can be deadly jacked by the breast wall after being adjusted in time, so that the purchase cost is increased, the adjustment is difficult, and the later maintenance cost is increased. Aiming at the problem, the design cancels an upper gap brick, the upper part of the breast wall brick 10 is provided with a boss 11, the structure of the brick body is changed, the breast wall brick 10 is buckled with the arch slag brick 6, and the brick body is expanded to play a sealing role after the roasting kiln.
Step four:
the sealing form of the main arch expansion joint is arranged.
At present, the sealing of the main arch centralized expansion joint basically adopts two forms, one is that the sealing form of the continuous silica brick main arch expansion joint adopts a wedge-shaped brick structure, the processing of the wedge-shaped brick is complex, the position of the wedge-shaped brick is required to be adjusted according to the temperature in the kiln baking process, or the wedge-shaped brick is inserted after the kiln baking is finished, but the subsequent expansion of refractory materials is not facilitated, and when the kiln is subjected to cold repair and temperature reduction, the wedge-shaped brick can be blocked in the expansion joint and is not facilitated to the temperature rise and expansion in the second kiln period; the second sealing mode is that the main arch bricks at two sides of the expansion joint are provided with grooves, and the expansion joint bricks are placed in the grooves, which is an improvement over the wedge-shaped brick structure, but sealing materials can fall into two sides of the expansion joint bricks, the sealing materials can fill the gaps in the grooves when the heat preservation construction of the expansion joint clamping and building is finished in the baking kiln, and the sealing materials can also fall into the gaps in the grooves when the kiln is subjected to cold repair and temperature reduction, which is also not beneficial to the temperature rise and expansion in the second kiln period.
The small expansion joint between the middle ring and the ring of each main arch is not sealed at present, but the AZS material contracts to a certain extent at 950-1150 ℃, the conventional electric melting main arch requires cold protection before a kiln, only 2-3 bricks are kept for heat protection, and if the expansion joint between the ring and the ring of the AZS material arch brick part is not sealed, when the temperature is raised to the contraction point of the AZS material, the sealing material is filled into the expansion joint, so that the subsequent temperature rise expansion is influenced.
Therefore, the sealing form of the main arch expansion joint is redesigned, a groove is reserved at the central expansion joint and the small expansion joint of the AZS brick, and the small expansion joint cover joint brick between the central ring and the ring of each main arch of the central expansion joint cover joint brick and the main arch AZS brick is arranged. The concentrated expansion joint can be completely sealed, and the heat loss can be effectively reduced. A small expansion joint sealing structure is arranged aiming at the main arch characteristic of the AZS material, so that the problem that sealing materials are easy to fall into the AZS electric melting brick after the AZS electric melting brick is contracted at 950-1150 ℃ is solved. The overall structure is simple, later-stage adjustment is not needed, sealing materials and impurities can be prevented from falling into the expansion joint, the quality of the baking kiln and the quality of the combination of the expansion joint are improved, and the guarantee is provided for the use of the electric melting arch in the second kiln stage.
Step five:
and selecting a main arch heat preservation form.
The main arch of the oxy-fuel combustion kiln is made of an electric melting material, the heat conductivity coefficient is greatly increased compared with that of the silica brick main arch, and heat insulation is enhanced relative to the silica brick main arch, so that heat loss of the main arch is reduced. The heat preservation form matched with the kiln is selected according to the burning form of the kiln and the material of the crown.
The principle of the invention is as follows:
the invention is a brand new main arch structure design of the total oxygen combustion glass kiln, by optimizing the material distribution of the main arch, reasonably setting the main arch structure, adopting the main arch melting flowing guide structure, designing the sealing mode of arch slag bricks and breast walls, the sealing mode of the main arch expansion joints and the heat insulation structure suitable for the large total oxygen combustion glass kiln matched with the main arch structure, reducing the investment of the kiln, improving the stability and the economy of the whole structure of the kiln, reducing the cleaning times of combustion guns, reducing the corrosion of refractory materials, prolonging the service life of the kiln, improving the sealing and heat insulation effects of the kiln, improving the quality of the kiln, realizing the use of the electric melting main arch structure in the second kiln period, ensuring the application of the total oxygen combustion technology on the glass kiln and fully embodying the advancement of the total oxygen combustion technology.
Claims (10)
1. The large arch structure of the large-scale total oxygen combustion glass kiln is characterized by comprising a front large arch (1) and a rear large arch (2), wherein the front large arch (1) and the rear large arch (2) are respectively composed of multi-ring large arch bricks, each ring of large arch bricks of the front large arch (1) are sequentially formed by arranging arch bricks (8), both sides of each arch brick (8) are provided with flow guide bricks (7), both sides of each flow guide brick (7) are provided with arch slag bricks (6), the rear large arch (2) is composed of the multi-ring large arch bricks, and each ring of large arch bricks are sequentially formed by arranging the arch bricks (8).
2. The large oxy-fuel combustion glass furnace crown structure according to claim 1, wherein the front crown (1) is an AZS zirconia corundum brick, and the rear crown (2) is an alpha beta corundum brick.
3. The large arch structure of the large oxy-fuel combustion glass furnace as claimed in claim 1, wherein 1-3 diversion bricks are arranged on each side of the diversion brick (7).
4. The large total oxygen combustion glass furnace crown structure as claimed in claim 1, wherein the front crown (1) is a crown electric melting brick, the crown bricks of each ring are formed side by side, and the cross section of a single large crown brick is in a trapezoid shape with a large top and a small bottom.
5. The large arch structure of the large oxy-fuel combustion glass furnace as claimed in claim 1, wherein the upper part of the deflector brick (7) is of arch brick structure, the lower part is of deflector structure (9) arranged on the inner cambered surface along the longitudinal direction of the furnace, and the deflector structure (9) is of ridge structure protruding from the inner surface of the large arch brick.
6. The large arch structure of the large-scale total-oxygen combustion glass kiln as claimed in claim 5, wherein the height of the flow guide structure (9) is selected to be 20-50 mm.
7. The large arch structure of the large-scale oxy-fuel combustion glass furnace according to claim 1, wherein a breast wall brick (10) is arranged below the arch slag bricks (6), a boss (11) is arranged on the upper portion of the breast wall brick (10), the boss (11) is buckled with the arch slag bricks (6), and a gap is reserved between the breast wall brick (10) and the arch slag bricks (6).
8. The large arch structure of the large oxy-fuel combustion glass furnace as claimed in claim 7, wherein the gap is internally laid with a polycrystalline fiber cotton (12) resistant to 1600 ℃.
9. The large total oxygen combustion glass furnace arch structure as claimed in claim 1, wherein a groove is formed between each ring of arch bricks, and a cover seam brick is arranged on the groove and is of a T-shaped structure;
and small expansion gaps are arranged among the arch bricks (8), cover gap bricks are arranged on the small expansion gaps, and the cover gap bricks are of T-shaped structures.
10. The large total-oxygen combustion glass kiln crown structure as claimed in claim 1, wherein the upper surfaces of the front crown (1) and the rear crown (2) are provided with heat-insulating layers, and the heat-insulating layers are provided with 5-7 layers.
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| CN202010369452.2A CN111763000A (en) | 2020-05-01 | 2020-05-01 | Large arch structure of large-scale total oxygen combustion glass kiln |
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| CN202010369452.2A CN111763000A (en) | 2020-05-01 | 2020-05-01 | Large arch structure of large-scale total oxygen combustion glass kiln |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480142A (en) * | 2021-07-21 | 2021-10-08 | 甘肃旭康材料科技有限公司 | Glass kiln |
| CN115894018A (en) * | 2023-01-05 | 2023-04-04 | 郑州方铭高温陶瓷新材料有限公司 | Glass kiln material flowing nozzle brick and preparation method thereof |
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| JPH10120462A (en) * | 1996-10-18 | 1998-05-12 | Asahi Glass Co Ltd | Zirconia refractory |
| CN206531399U (en) * | 2017-01-20 | 2017-09-29 | 彩虹（合肥）光伏有限公司 | A kind of total oxygen glass furnace arch roof construction |
| CN208485791U (en) * | 2018-04-09 | 2019-02-12 | 秦皇岛玻璃工业研究设计院有限公司 | A kind of big arch arch brick of corrosion resistant oxy-fuel combustion glass melting furnace, big arch and oxy-fuel combustion glass melting furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10120462A (en) * | 1996-10-18 | 1998-05-12 | Asahi Glass Co Ltd | Zirconia refractory |
| CN206531399U (en) * | 2017-01-20 | 2017-09-29 | 彩虹（合肥）光伏有限公司 | A kind of total oxygen glass furnace arch roof construction |
| CN208485791U (en) * | 2018-04-09 | 2019-02-12 | 秦皇岛玻璃工业研究设计院有限公司 | A kind of big arch arch brick of corrosion resistant oxy-fuel combustion glass melting furnace, big arch and oxy-fuel combustion glass melting furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480142A (en) * | 2021-07-21 | 2021-10-08 | 甘肃旭康材料科技有限公司 | Glass kiln |
| CN115894018A (en) * | 2023-01-05 | 2023-04-04 | 郑州方铭高温陶瓷新材料有限公司 | Glass kiln material flowing nozzle brick and preparation method thereof |
| CN115894018B (en) * | 2023-01-05 | 2023-09-22 | 郑州方铭高温陶瓷新材料有限公司 | Glass kiln material flow nozzle brick and preparation method thereof |
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Application publication date: 20201013 |