CN212076818U - Stepped arch structure of rolled glass melting furnace - Google Patents
Stepped arch structure of rolled glass melting furnace Download PDFInfo
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- CN212076818U CN212076818U CN202020453682.2U CN202020453682U CN212076818U CN 212076818 U CN212076818 U CN 212076818U CN 202020453682 U CN202020453682 U CN 202020453682U CN 212076818 U CN212076818 U CN 212076818U
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Abstract
The utility model discloses a stepped arch structure of a rolled glass melting furnace, wherein a transition arch is additionally arranged between a branch passage inlet arch and a branch passage arch, the transition arch is built on a branch passage transition breast wall, and the branch passage transition breast wall and the branch passage breast wall are integrally built and only have different heights; the length of the branch passage inlet arch is greater than the thickness of the cross passage breast wall, so that the transition arch is separated from the cross passage breast wall and is not contacted with the cross passage breast wall; the heights of the branch passage inlet arch, the transition arch and the branch passage arch are sequentially increased to form the stepped arch structure. Thus, the high-temperature gas emitted by the expansion straight joint can be prevented from burning the supporting steel member of the cross passage arch, and the sealing treatment of the expansion straight joint can be carried out; and the outer side of the transverse passage breast wall at the side of the branch passage is exposed in the air, and the air can play a role in cooling the transverse passage breast wall.
Description
Technical Field
The utility model relates to the technical field of glass production, in particular to a stepped arch structure for reinforcement in a rolled glass melting furnace.
Background
The photovoltaic glass is a high-transmittance glass material for photovoltaic modules and is produced by adopting a calendering process. The larger the melting capacity of the glass melting furnace is, the lower the energy consumption is, and the lower the manufacturing cost of the corresponding glass is. The melting furnace for photovoltaic glass production is therefore a furnace with multiple lines (multiple branch channels), namely: a plurality of branch passages are arranged on one side of one transverse passage and perpendicular to the transverse passage, and all the branch passages are connected in parallel on the transverse passage. In normal production, glass raw materials are firstly melted into molten glass at high temperature in a melting tank of a glass melting furnace, then flow into a transverse passage for cooling, further flow into a branch passage for further cooling, and are sent into a forming area for forming after reaching the forming temperature. Due to the flow of the molten glass, the spaces among the melting tank, the lateral passage and the branch passage are communicated with each other by the flow of the molten glass.
The largest glass melting furnace I for photovoltaic glass is a five-line furnace (namely five branch passages, see figure 1), namely five branch passages III are distributed on a transverse passage II; the length of the transverse passage breast wall reaches 45 meters, and the height reaches 1.8 meters. The connection between the transverse channel II and the branch channel III is shown in FIG. 4 (FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 1). However, in a baking furnace (i.e., the furnace is baked to gradually raise the temperature to a desired temperature before being built to be put into normal production) or in a normal production process, the transverse passage breast wall is always in a high temperature state, and the long and high transverse passage breast wall is easily deformed and even collapsed, so that the glass melting furnace cannot be safely operated for the whole furnace age.
The glass process requires that the temperature of the glass liquid is stabilized at 1150-1250 ℃ after being cooled by the branch passages, the temperature difference cannot exceed +/-1 ℃, and the space pressure of the glass liquid is micro-positive pressure. When molten glass flows into the transverse passage from the high-temperature melting tank, high-temperature gas in the partial melting tank is brought. In order to prevent the high-temperature gas from flowing into the branch passage again and affecting the stability of the branch passage glass liquid temperature and pressure, the cross-sectional area of the branch passage inlet arch 3 at the intersection of the cross passage and the branch passage is reduced as much as possible, that is, the opening degree of the branch passage inlet arch 3 is reduced as much as possible, so that the width and height H of the inlet arch 3 are required to be reduced as much as possible1Are reduced as much as possible. Branch passage inletThe arch 3 is directly built on the top surface of the tank wall of the molten glass tank, and the width of the inlet arch 3 needs to be matched with the width of the branch passage and is difficult to change, so that the high-temperature gas entering the branch passage III can be reduced to the maximum extent only by enabling the height of the inlet arch 3 to be as low as possible.
However, the branch passage iii requires the rolling process, and requires the kiln holes 9 and the air blowing holes 10 integrated with the branch passage breast wall 8 to be embedded in the branch passage breast wall 8, and therefore the kiln holes 9 and the air blowing holes 10 must be installed only when the branch passage breast wall 8 has a certain height (not less than 460 mm). And because the branch passage arch 7 of the branch passage III is directly contacted with the cross passage breast wall 2, the top surface of the cross passage breast wall 2 is higher than the arch top of the branch passage arch 7, namely the height of the cross passage breast wall 2 is higher than the sum of the heights of the branch passage breast wall 8 and the branch passage arch 7, the safety height of the branch passage arch 7 is about 900mm, and expansion gaps are reserved between the branch passage arch 7 and the branch passage breast wall 8 and between the branch passage breast wall 8 and the top surface of the branch passage glass liquid pool VII pool wall. Therefore, the height of the support passage arch 7 is more than or equal to 1650mm, and the height H of the transverse passage breast wall 2 needs more than or equal to 1800mm to meet the requirement. The contact part of the support passage arch 7 and the transverse passage breast wall 2 has an expansion straight slit 14, high-temperature gas can emerge during the baking kiln and normal operation, the high-temperature gas can not seal the high-temperature gas, and the support steel member 13 of the transverse passage arch 1 can be burnt by the high-temperature gas, so that the transverse passage arch 1 has a safety problem and can be collapsed seriously. Meanwhile, in the baking kiln or the normal production process, the transverse passage breast wall 2 with the length of 45 meters and the height of 1.8 meters is high in gravity center, the inner surface and the outer surface of the transverse passage breast wall 2 on the side directly contacting with the branch passage arch 7 are in high-temperature environments, the inner side and the outer side are subjected to physical erosion and chemical erosion of high-temperature gas, the transverse passage breast wall is easy to burn and deform, and the transverse passage breast wall cannot be thermally repaired in a hot state, so that the transverse passage breast wall finally collapses. Either of the two conditions can cause production to be suspended, so that the production efficiency of the glass is reduced and the production cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cascaded arch structure of calendering glass melting furnace to the technical defect who exists among the prior art, promptly: a transition arch is arranged between the branch passage inlet arch and the branch passage arch, and after the length of the branch passage inlet arch is increased, the transition arch and the branch passage arch are both far away from the cross passage breast wall, so that the height of the cross passage breast wall does not need to be higher than the top of the branch passage arch, and the height of the cross passage breast wall can be reduced. The height of the transverse passage breast wall is reduced, 1) the gravity center of the transverse passage breast wall is moved downwards, and the stability and the safety of the whole structure of the breast wall are improved; 2) the area of the transverse passage breast wall subjected to physical erosion and chemical erosion of flame gas is reduced, and particularly, the two sides of the transverse passage breast wall body in contact with the branch passages are prevented from being subjected to physical erosion and chemical erosion of the flame gas, so that the temperature of each part of the transverse passage breast wall body is uniform, and the problems of wall deformation and inclined collapse caused by nonuniform temperature and different burning loss degrees of each part of the wall body are solved.
The stepped crown structure of the rolled glass melting furnace comprises a transverse passage and a plurality of parallel branch passages which are arranged on the same side of the transverse passage and are vertical to the transverse passage, wherein the transverse passage comprises a transverse passage breast wall arranged in parallel and a transverse passage crown built on the top surface of the transverse passage breast wall, and the branch passages comprise a branch passage breast wall arranged in parallel and a branch passage crown built on the top surface of the branch passage breast wall; a branch passage inlet arch is arranged on the top surface of the branch passage glass liquid pool wall at the intersection of the cross passage and the branch passage and at the bottom of the cross passage at the intersection of the branch passage and the branch passage, a section of transition breast wall is additionally arranged between the branch passage inlet arch and the branch passage breast wall, and the transition breast wall is built with a transition arch; the heights of the branch passage inlet arch, the transition arch and the branch passage arch are sequentially increased to form the stepped arch structure.
The transition breast wall and the branch passage breast wall are integrally built, and the height of the transition breast wall is 170mm-260mm lower than that of the branch passage breast wall.
Height H of said branch passage transition breast wall2Is 180mm-200mm, and the height of the arch top of the transition arch from the top surface of the branch passage transition breast wall is 600mm-650 mm.
Height H of said bypass entry arch1Is 610mm-630 mm.
Height H of said branch passage breast wall3350mm-460mm, and the height of the arch crown top of the branch passage from the top surface of the branch passage breast wall is 735mm-930 mm.
The length of the transition arch is 300mm-800 mm.
The length of the branch passage inlet arch is greater than the thickness of the cross passage breast wall, and the transition arch and the cross passage breast wall are separated by the branch passage inlet arch.
The length of the branch passage inlet arch is 1.8-2 times of the thickness of the cross passage breast wall.
Length L of the bypass inlet arch1Is 810mm-920 mm.
The heights of the branch passage inlet arch, the transition arch and the branch passage arch are sequentially increased to form the stepped arch structure.
The utility model discloses a step arch structure of a rolled glass melting furnace, which is characterized in that a transition arch is arranged between a branch passage inlet arch and a branch passage arch, and the heights of the branch passage inlet arch, the transition arch and the branch passage arch are sequentially increased to form a step arch structure; and meanwhile, the length of the branch passage inlet arch is increased, so that the length of the branch passage inlet arch is 1.8-2 times of the thickness of the cross passage breast wall. Thus, the expansion straight joint between the branch passage inlet arch and the transition arch is far away from the cross passage breast wall, so that the high-temperature gas emitted by the expansion straight joint is prevented from ablating the supporting steel member of the cross passage arch, and the temperature at the position can also carry out the sealing treatment of the expansion straight joint; and a large gap is formed between the transverse passage breast wall and the transition arch, so that the outer side of the transverse passage breast wall at the branch passage side is exposed in the air, the air can play a cooling role on the transverse passage breast wall, and the inner surface and the outer surface of the transverse passage breast wall are prevented from being subjected to physical erosion and chemical erosion of flame gas. In addition, since the transition arch and the branch passage arch are not in direct contact with the cross passage breast wall, the height of the cross passage breast wall is not higher than that of the crown of the branch passage arch, namely: the utility model discloses a cascaded arch structure can reduce the height of crossing passageway breast wall, makes the height of crossing passageway breast wall drop to 1350mm-1390mm from 1800 mm. The height of the transverse passage breast wall is reduced, the gravity center of the transverse passage breast wall moves downwards, and the stability of the whole transverse passage breast wall structure is improved. In a word, the utility model discloses adding of cascaded arch structure establishes can make glass melting furnace cross access breast wall and cross access arch overall structure simple, do benefit to build by laying bricks or stones, and structural stability is good, can ensure that calendering technology method glass melting furnace for photovoltaic glass can move a whole kiln age that reaches 10 years smoothly safely.
Drawings
FIG. 1 is a schematic structural view of a glass melting furnace for photovoltaic glass by a calendering process;
FIG. 2 is a cross-sectional view taken along section A-A of FIG. 1, showing a stepped crown structure of the rolled glass melting furnace of the present invention;
FIG. 3 is a cross-sectional view taken along section B-B of FIG. 2, showing the stepped crown structure of the rolled glass melting furnace of the present invention;
FIG. 4 is a schematic structural view of a cross section A-A of the conventional glass melting furnace shown in FIG. 1;
FIG. 5 is a schematic structural view of a D-D section of the conventional glass melting furnace shown in FIG. 4.
Detailed Description
In order to prolong the service life of the glass melting furnace for the photovoltaic glass by the calendering process method, the utility model adds a transition arch as a reinforcing device between the branch passage inlet arch and the branch passage arch, wherein the height of the transition arch (the height of the arch refers to the distance from the arch top to the pool wall top surface of the glass liquid pool) is 235mm-610mm lower than that of the branch passage arch, and is 150mm-240mm higher than that of the branch passage inlet arch. The branch passage inlet arch is laid on the pool wall top surface of the transverse passage molten glass pool, the height of the corresponding breast wall is 0, and the height of the inlet arch top from the pool wall top surface is 610mm-630 mm; the transition arch is laid on the breast wall of the transition arch, and the height H of the breast wall2Is 180mm-200mm, and the height of the arch top of the transition arch from the top surface of the breast wall is 600mm-650 mm; breast wall height H for arch laying of support channel3350mm-460mm, and the height of the arch crown of the branch passage from the top surface of the breast wall is 735mm-930 mm; therefore, along the glass liquid flow direction, the heights of the branch passage inlet arch, the transition arch and the branch passage arch are sequentially increased to form a stepped arch structure. Meanwhile, the length of the branch passage inlet arch is increased towards the direction of the branch passage, the cross passage breast wall is separated from the branch passage arch, and the expansion straight joint between the branch passage arch and the branch passage inlet arch is far away from the cross passage breast wall. If the length of the branch passage inlet arch is increased, the height of the branch passage inlet arch is more than that of the branch passage arch, so that the branch passage inlet arch cannot be in seamless connection with the branch passage arch, a broken seam occurs between the branch passage inlet arch and the branch passage arch, and the inner part of the branch passage is emptyThe chamber is communicated with the outside, and the stability of the temperature and the pressure of the glass liquid in the branch passage cannot be ensured, so that a transition breast wall and a transition arch are required to be arranged between the branch passage inlet arch and the branch passage breast wall to fill the gap between the branch passage inlet arch and the branch passage arch caused by the height difference. In the stepped arch structure, the branch passage inlet arch and the transition arch are overlapped during building, and the transition arch and the branch passage arch are also overlapped without a crack, so that the inside of the branch passage is not communicated with the outside.
After the glass melting furnace is provided with the stepped arch structure, compared with the existing photovoltaic glass melting furnace: 1) the height of the transverse passage breast wall is reduced, the center of gravity is moved downwards, and the stability of the whole breast wall structure is improved; 2) the outer side of the transverse passage breast wall adjacent to the side of the branch passage is exposed in ambient air, so that the physical scouring erosion and chemical erosion of high-temperature gas on the two sides of the transverse passage breast wall are avoided; 3) the expansion straight joint is far away from the cross passage breast wall, so that the possibility that high-temperature gas penetrating from the expansion straight joint ablates the arch support steel member of the cross passage is avoided, and the sealing treatment of the expansion straight joint is facilitated.
The three advantages ensure that the integral structure of the cross passage breast wall and the cross passage arch has good stability and simple structure, is beneficial to building, and can ensure that the photovoltaic glass melting furnace produced by the calendering process can smoothly and safely run for a whole furnace age period of 10 years.
The present invention will be described in more detail and further illustrated with reference to specific examples, which are not intended to limit the present invention in any way.
As shown in figures 2 and 4, the transverse passage II of the rolled glass melting furnace comprises an upper space and a lower space, the lower space comprises a transverse passage molten glass pool VI, and the transverse passage molten glass pool VI is an open groove-shaped pool consisting of a transverse passage pool bottom 5 and two oppositely arranged transverse passage pool walls 4. Two sides of the tank wall 4 of the transverse passage glass liquid tank VI are also provided with vertical columns VIII. A transverse passage breast wall 2 is built on the top surface of the wall of the transverse passage molten glass pool along the length direction of the transverse passage, the transverse passage breast wall 2 is fixed on a stand column VIII and the top end of the transverse passage pool wall 4 through a lower support bracket V, and the thickness L of the transverse passage breast wall 2 is 450mm-460 mm. The top of the cross passage breast wall 2 is built with an arched cross passage arch 1 which connects the breast walls at two opposite sides, an upper support bracket IV is arranged between the cross passage arch 1 and the cross passage breast wall 2 for supporting the cross passage arch 1, and the cross passage breast wall 2 and the cross passage arch 1 jointly form the upper space of the cross passage II. The breast wall on one side of the transverse passage II is adjacent to a melting tank of the glass melting furnace (the left side in the figure), and the other side of the transverse passage II is vertical to and communicated with a plurality of parallel branch passages III (the right side in the figure). The transverse passage structure is basically similar to the existing transverse passage structure, and the height H of the transverse passage breast wall 2 is reduced to 1350mm-1390mm in the embodiment.
The structure of the branch passage III is shown in the combined drawings of fig. 2-5, and is basically the same as that of the transverse passage II, and also comprises an upper space and a lower space, wherein the lower space comprises a branch passage molten glass pool VII, and the branch passage molten glass pool VII is an open groove-shaped pool consisting of a branch passage pool bottom 12 and two oppositely arranged branch passage pool walls 11. And two sides of the cell wall 11 of the branch passage molten glass cell VII are also provided with vertical columns VIII. A branch passage breast wall 8 is built on the top surface of the pool wall along the length direction of the branch passage, the branch passage breast wall 8 is fixed on the upright post VIII and the top end of the branch passage pool wall 11 through a lower support bracket V, and the height H of the branch passage breast wall 83Is 350mm-460 mm. The top of the branch passage breast wall 8 is built with an arched branch passage arch 7 which connects the breast walls at two opposite sides, and the height of the arch top of the branch passage arch 7 from the top surface of the branch passage breast wall 8 is 735mm-930 mm; an upper support bracket IV is arranged between the branch passage arch 7 and the branch passage breast wall 8 for supporting the branch passage arch 7, and the branch passage breast wall 8 and the branch passage arch 7 jointly form an upper space of a branch passage III. The branch passage breast wall 8 is also provided with a kiln baking hole 9 and an air blowing hole 10 which are communicated with the outside of the kiln. In the present embodiment, the structure of the branch passage is not changed.
A branch passage inlet arch 3 is provided at a position where the branch passage iii intersects the lateral passage ii, that is, at a starting point of the branch passage iii (starting from a flow direction of the molten glass, starting from an inflow direction of the molten glass, and ending from an outflow direction). The branch passage inlet arch 3 is laid at the intersection point of the cross passage molten glass pool VI and the branch passage molten glass pool VII, and the circular arc-shaped arch structure supports the cross passage breast wall 2 at the intersection point to ensure the stability of the breast wall. The branch passage inlet arch 3 is directly built on the upper part of the branch passage molten glass pool VII, and the branch passageThe two ends of the inlet arch 3 are respectively fixed on the tops of two pool walls of the branch passage molten glass pool VII, and the branch passage inlet arch 3 is positioned at one side of a transverse passage breast wall 2 (the right side shown in figure 4) connected with the branch passage inlet arch 3, namely: a part of the bottom of the transverse passage breast wall at the intersection with the branch passage III is removed, and the transverse passage breast wall is directly laid on the top surface of the branch passage glass liquid pool wall 11 (not on the branch passage breast wall 8) and spans between the branch passage glass liquid pool walls 11. The arch top of the branch passage inlet arch 3 is away from the top of the pool wall of the cross passage molten glass pool VI1Is 610mm-630mm, and has a length L1(i.e., the length along the length of branch channel III) is 810mm-920 mm. Since the branch passage inlet arch 3 is built at the bottom of the cross passage breast wall 2, the cross passage breast wall 2 is still used as a connection between the crown of the inlet arch 3 and the cross passage arch 1.
In this embodiment, a transition arch 6 is additionally provided between the branch passage inlet arch 3 and the branch passage breast wall 8, as shown in fig. 2 and 3. A section of transition breast wall 15 is additionally arranged between the branch passage inlet arch 3 and the branch passage breast wall 8, the transition breast wall 15 and the branch passage breast wall 8 are integrally built, the length of the transition breast wall 15 is 300mm-800mm, and the height H2Is 180mm-200 mm. The transition breast wall 15 is built with a transition arch 6, and the height of the arch top of the transition arch 6 from the top surface of the transition breast wall 15 is 600mm-650 mm.
The heights of the branch passage inlet arch 3, the transition arch 6 and the branch passage arch 7 (namely the distance from the arch tops of all the arches to the top surface of the branch passage glass liquid pool wall) are sequentially increased to form the stepped arch structure. The stepped breast wall height forms a branch passage stepped crown, so that the branch passage crown 7 is not directly contacted with the cross passage breast wall 2 and is far away from the cross passage breast wall 2, and the height of the cross passage breast wall 2 is not influenced by the crown height of the branch passage crown 7. Set up in the glass melting furnace the utility model discloses cascaded arch structure, the 2 high H of cross access breast wall only are 1350mm-1390mm, and it reduces 400mm-450mm to reach 45 meters II high H of breast wall of cross access than current melting furnace cross access breast wall, and the 2 centrobaric reductions of cross access breast wall have strengthened the holistic stability of cross access breast wall 2 greatly. In addition, along with the increase of the length of the branch passage inlet arch 3, the outer side of the right cross passage breast wall 2 can be exposed in the atmospheric ambient air, and the cooling effect of the ambient air strengthens the resistance of the cross passage breast wall 2Physical scouring erosion and chemical erosion of the high temperature atmosphere of the glass melting furnace. Length L of bypass inlet arch 31The thickness L of the cross passage breast wall 2 is 1.8-2 times of the thickness L of the cross passage breast wall 2, so that an expansion straight seam 14 between the branch passage inlet arch 3 and the transition arch 6 (the existing melting furnace is the expansion straight seam between the cross passage and the branch passage) is far away from a support steel member 13 of the cross passage breast wall 2, the possibility that high-temperature gas emitted from the expansion straight seam 14 ablates the support steel member 13 is avoided, and meanwhile, enough space and conditions (namely, the temperature is not too high) are provided for sealing the expansion straight seam 14. The reduction of the height of the cross passage breast wall 2, the exposure of the outer side in the air of the atmospheric environment and the distance of the expansion straight seam 14 from the supporting steel member 13 have the triple functions of ensuring that the cross passage arch 1 and the cross passage breast wall 2 are not easy to ablate, deform and collapse in the process of roasting or normal production, and the operation is safe and stable for 10 years of kiln age.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should be regarded as the contents of the present invention.
Claims (10)
1. A step-type arch structure of a rolled glass melting furnace comprises a transverse passage and a plurality of parallel branch passages which are arranged on the same side of the transverse passage and are vertical to the transverse passage, wherein the transverse passage comprises a transverse passage breast wall arranged in parallel and a transverse passage arch built on the top surface of the transverse passage breast wall, and the branch passages comprise a branch passage breast wall arranged in parallel and a branch passage arch built on the top surface of the branch passage breast wall; a branch passage inlet arch is arranged on the top surface of the branch passage glass liquid pool wall at the intersection of the cross passage and the branch passage and at the bottom of the cross passage at the intersection of the branch passage and the branch passage, and is characterized in that a section of transition breast wall is additionally arranged between the branch passage inlet arch and the branch passage breast wall, and a transition arch is built on the transition breast wall; the heights of the branch passage inlet arch, the transition arch and the branch passage arch are sequentially increased to form the stepped arch structure.
2. The stepped crown structure of a drawn glass melting furnace as claimed in claim 1, wherein the transition breast wall is integrally constructed with the branch passage breast wall, and the height of the transition breast wall is 170mm to 260mm lower than that of the branch passage breast wall.
3. The stepped crown structure of a drawn glass melting furnace as in claim 2, wherein the height H of the branch passage transition breast wall2Is 180mm-200mm, and the height of the arch top of the transition arch from the top surface of the branch passage transition breast wall is 600mm-650 mm.
4. The stepped crown structure of a drawn glass melting furnace as claimed in claim 3, wherein the height H of the bypass inlet crown1Is 610mm-630 mm.
5. The stepped crown structure of a drawn glass melting furnace as claimed in claim 4, wherein the height H of the branch passage breast wall3350mm-460mm, and the height of the arch crown top of the branch passage from the top surface of the branch passage breast wall is 735mm-930 mm.
6. The stepped crown structure of a drawn glass melting furnace as in claim 5, wherein the length of the transition crown is 300mm to 800 mm.
7. The stepped crown structure of a drawn glass melting furnace as claimed in any one of claims 1 to 6, wherein the length of the strut access inlet crown is greater than the thickness of the cross access breast wall, and the transition crown is spaced apart from the cross access breast wall by the strut access inlet crown.
8. The stepped crown structure of a drawn glass melting furnace as in claim 7, wherein the length of the bypass inlet crown is 1.8-2 times the thickness of the cross-channel breast wall.
9. The stepped crown structure of a drawn glass melting furnace as in claim 8, wherein the length L of the bypass inlet crown1Is 810mm-920 mm.
10. The stepped crown structure of a drawn glass melting furnace as claimed in claim 9, wherein the heights of the branch passage inlet crown, the transition crown and the branch passage crown are sequentially increased to form the stepped crown structure.
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