Flow dividing channel for glass liquid flow of one-furnace multi-line glass melting furnace
By setting up a diversion zone and adjustment zone behind the borehole of a one-kiln multi-line glass melting kiln, the problem of differences in the flow rate, temperature and uniformity of the glass liquid in the branch passage is solved, and isothermal and mass diversion of the glass liquid in each branch passage is achieved, improving the yield and production stability.
Patent Information
- Application Number
- CN202510474880.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2025-05-13
AI Technical Summary
The existing one-kiln multi-line glass melting kiln has a large difference in the flow rate, temperature and uniformity of the glass liquid in the branch passage, resulting in poor production capacity and quality stability, and the complex design increases the difficulty of construction.
The diversion area and adjustment area of the glass liquid are set up behind the borehole, and the glass liquid is divided and adjusted by the partition weir and the flow dam, so that the glass liquid is fully uniform in the adjustment area, thereby realizing isothermal and mass diversion of the glass liquid of each branch passage.
Through the design of the diversion zone and adjustment zone, the temperature and quality consistency of the glass liquid of each branch passage is achieved, the yield rate is improved, the difficulty of construction and production management is reduced, and the length and heat loss of the branch passage is reduced.
Smart Images
Figure CN119977283A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of glass manufacturing, in particular to a diversion channel for glass liquid flow in a multi-line glass melting furnace. Background Art
[0002] Photovoltaic glass kilns are one of the most important equipment for producing photovoltaic glass. In recent years, with the continuous expansion of the photovoltaic industry market, the demand for photovoltaic glass has increased dramatically. Large-tonnage one-kiln multi-line large-pulling glass kilns have gradually become the mainstream. Glass kilns have developed from one kiln and two lines with 400t / d in the past to one kiln and four lines with 800 t / d at present. By 2024, the production lines that have been put into operation will generally use kilns with ultra-large pulling capacities of more than 1,200 t / d with one kiln and five lines or one kiln and six lines.
[0003] At present, the structure of these kilns generally starts from the charging port and mainly includes the melting zone (including the melting part, the clarification part and the homogenization part), the neck, the horizontal passage and several branch passages of different lengths (such as Figure 5 The figure shows a common one-kiln four-line 800t / d kiln structure). The main feature of this melting furnace structure is that a straight horizontal passage is connected to multiple branch passages of different lengths and parallel to each other, and each branch passage is symmetrically arranged on both sides of the longitudinal center line of the melting furnace; the glass batch is melted and clarified in the melting zone to form a uniform glass liquid, which flows into the horizontal passage through the neck, and then naturally flows into each branch passage through the horizontal passage. Finally, it is rolled, formed, annealed and cooled by a calender to become photovoltaic glass sheets. The photovoltaic glass kiln with this passage structure has different distances from the longitudinal center line of the melting furnace for the glass liquid inlet of each branch passage, resulting in greatly different flow speeds, temperatures and even uniformity of the glass liquid when it flows into each branch passage; in order to ensure that the temperature of the glass liquid at the outlet of all branch passages is consistent, the furnace designers design branch passages of different lengths according to the cooling rate of the glass liquid to meet the molding process requirements. Figure 5 The longest of the four branch passages is more than twice the length of the shortest branch passage. This setting of different lengths of branches makes it difficult to ensure the consistency of the glass liquid performance in each branch passage during the production process, resulting in poor production capacity and quality stability of glass processed by each branch line. At the same time, this design requires laying multiple water, electricity, and gas lines, reducing the smoothness of the process; it increases the engineering cost and construction difficulty during the project construction. Summary of the invention
[0004] In view of the problems raised by the background technology, the purpose of the present invention is to propose a diversion channel for the glass liquid flow of a one-kiln multi-line glass melting furnace. The present invention analyzes the causes of defects in the glass products of each branch line of the current one-kiln multi-line glass melting furnace and conducts in-depth research on the flow patterns of the glass liquid in each branch passage of the melting furnace. A diversion zone and an adjustment zone for the glass liquid are set after the neck of the glass melting furnace, and the height of the bottom of the adjustment zone is set higher than the height of the bottom of the diversion zone. The glass liquid can be fully uniform in the adjustment zone, thereby improving the yield of the glass and reducing the difficulty of construction and production management.
[0005] To achieve the above object, the present invention adopts the following technical solutions: A diversion channel for glass liquid flow in a multi-line glass melting furnace of a single kiln includes a melting zone, a neck and a diversion pool, wherein the front end inlet of the neck is connected to the melting zone, and the rear end outlet is connected to the diversion pool, and the central axis of the diversion pool is coaxial with the central axis of the neck when viewed from above; the inside of the diversion pool is provided with a diversion zone, a dividing weir, an adjustment zone and a plurality of branch passages from front to back, the two ends of the dividing weir are respectively connected to the left and right inner walls of the diversion pool, the diversion zone and the adjustment zone are respectively located on the front and rear sides of the dividing weir, and the plurality of branch passages are respectively connected to the rear end of the adjustment zone; the bottom surface of the diversion zone is a plane, and the bottom surface of the adjustment zone is also a plane, and the bottom surface height of the adjustment zone is higher than the bottom surface height of the diversion zone; a flow dam is provided in the middle of the front side of the dividing weir, facing the neck, and the flow dam and the dividing weir are integrally formed, and the flow dam and the dividing weir divide the glass liquid in the diversion zone into two paths, and the two paths of glass liquid respectively cross the dividing weir from the left and right sides of the flow dam to enter the adjustment zone, and after mixing in the adjustment zone, they flow out from a plurality of branch passages at the same time.
[0006] The flow-incoming dam has a flow-incoming surface, which is an outwardly convex arc surface, with its convex direction facing the neck outlet, and its chord length is greater than the neck width.
[0007] The dividing weir includes a base and an adjusting part. The base is a rectangular parallelepiped structure as a whole, and its lower part is integrated with the bottom of the diversion pool, and the left and right ends of the base are respectively integrated with the left and right inner walls of the diversion pool; the adjusting part is a trapezoidal platform structure as a whole, and the bottom surface of the adjusting part is integrated with the upper surface of the base, and the front side surface of the adjusting part is parallel to the rear side surface of the adjusting part, and the left side surface and right side surface of the adjusting part extend to the left and right inner walls of the diversion pool respectively.
[0008] The left side surface of the adjusting portion is provided with a first guide surface and a first intercepting surface, the first guide surface is an inclined surface parallel to the front end edge line of the left side surface, and the first guide surface simultaneously cuts the left side surface and the front side surface of the adjusting portion; the first intercepting surface is an inclined surface parallel to the rear end edge line of the left side surface, and the first intercepting surface simultaneously cuts the left side surface and the rear side surface of the adjusting portion; The right side surface of the adjusting portion is provided with a second guide surface and a second cut-off surface. The second guide surface is an inclined surface parallel to the front end edge line of the right side surface, and the second guide surface simultaneously cuts the right side surface and the front side surface of the adjusting portion; the second cut-off surface is an inclined surface parallel to the rear end edge line of the right side surface, and the second cut-off surface simultaneously cuts the right side surface and the rear side surface of the adjusting portion.
[0009] The height of the base is not less than 50 mm. If the sum of the maximum heights of the base and the adjusting portion is H, and the height of the glass liquid level in the diversion area is h, then Hh>80 mm.
[0010] The height difference between the bottom surface of the adjustment area and the bottom surface of the diversion area is 50-250 mm.
[0011] The area of the diversion zone is S1, the area of the adjustment zone is S2, the area of the melting zone of the glass melting furnace is A, and if S1 / S2=B, then 10%≤B≤30%; if (S1+S2) / A=C, then 32%≤C≤38%.
[0012] The outlet end of the branch passage is provided with a slope rising backwards; and a plurality of branch passages are parallel to each other and have equal lengths.
[0013] The beneficial effects of the present invention are: (1) The present invention realizes isothermal and equal-mass effective diversion of glass liquid in each branch of a multi-line glass melting furnace by arranging a glass liquid diversion zone and a glass liquid adjustment zone after the neck. Since the dividing weir divides the lower layer of glass liquid in the diversion pool into front and back, the solid phase impurities in the glass liquid are blocked before the dividing weir, which can effectively reduce the solid inclusions in the product glass. The design of the adjustment zone after the dividing weir enables the small microbubbles in the glass liquid to be fully absorbed and dissolved in the glass liquid, thereby reducing the number of bubble defects in the product glass. The reduction of microbubbles can also significantly improve the transmittance of photovoltaic glass.
[0014] (2) Through model experiments, the present invention designs the height of the bottom of the adjustment zone to be higher than the height of the bottom of the diversion zone, and determines the reasonable area of the adjustment zone, so that the glass liquid can be fully uniform in the adjustment zone.
[0015] (3) The design of the present invention allows the molten glass to flow evenly into the adjustment zone through the diversion effect of the dividing weir in the diversion zone; the molten glass is fully mixed and homogenized in the adjustment zone, and its physical and chemical properties are uniform and stable. There is no need to set up branch passages of different lengths, and the length of the branch passages can be shortened according to process requirements, thereby reducing the heat loss of the branch passages and the amount of refractory materials used. At the same time, since the present invention adopts an equal-length branch passage design, a single-channel water, electricity, and steam line can directly reach each subsequent branch line use point, making the production process flow smoother and reducing the difficulty of construction and production management. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1It is a three-dimensional schematic diagram of the overall structure of the present invention.
[0017] Figure 2 It is a top view of the overall structure of the present invention.
[0018] Figure 3 for Figure 2 AA section view.
[0019] Figure 4 for Figure 2 BB cross-sectional view.
[0020] Figure 5 A top view of the glass liquid diversion structure of a multi-line glass melting furnace used in the prior art.
[0021] In the figure: 1-melting zone, 2-neck, 3-diverter pool; 31-diverter zone, 32-dividing weir, 33-adjustment zone; 321-base, 322-regulating part; 4-flow dam; 401-flow surface; 5-branch passage, 501-slope; 6-cross passage. Implementation
[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.
[0023] like Figure 5As shown, at present, the front end of the longitudinal center line of a multi-line glass melting furnace is composed of a feeding pool, a melting zone 1 and a neck 2 in sequence, and the melting zone 1 is composed of a melting part, a clarification part, and a homogenization part. The glass liquid diversion structure of the multi-line glass melting furnace is that the neck 2 outlet of the melting furnace is connected to a transverse passage 6, and more than two branch passages are arranged on the transverse passage 6, and each branch passage is connected to a float or rolling forming device. When producing glass, the glass liquid flowing out of the melting zone 1 passes through the neck 2, and then is diverted into several branch passages 6 of different lengths through the narrow transverse passage 6. When the glass liquid enters the transverse passage 6 through the neck 2, the transverse passage 6 is perpendicular to the longitudinal direction of the glass melting furnace. The transverse distance of the transverse passage 6 is called the length of the transverse passage 6, which is more than five times the width of the neck 2, while the width of the transverse passage 6 is only 10%-20% of the length of the transverse passage 6. The relative size belongs to a long and narrow structure, which is easy to cause a large transverse temperature difference in the flow direction of the glass liquid, so that the glass liquid temperature between the branch passages at the far and near ends is greatly different. It is common that the glass liquid at the entrance of the middle branch passage has a high flow rate and high temperature, while the glass liquid at the entrance of the side branch passage has a low temperature and a slow flow rate. This also leads to large differences in the uniformity of the glass liquid between the branch passages, which results in large differences in the quality of the glass liquid in each branch passage. Ultimately, the production capacity and quality of the glass of each branch line connected by each branch passage fluctuates continuously. In addition, after flowing out of the bottleneck 2, the glass liquid needs to pass through the narrow channels of the transverse passage 6 and the branch passage to make continuous large-angle turns many times. The glass liquid flow rates and temperature differences on both sides of the corner are quite different, which can easily form a "dead corner" where the glass liquid is almost still, causing glass crystallization and accumulation of impurities to produce glass defects. Especially when more than four branch passages are required for large tonnage, the transverse passage 6 is longer and has more corners, making it more difficult to guarantee the quality of the glass liquid, resulting in poor production capacity and quality stability of the entire glass melting furnace.
[0024] In order to solve the problem of large differences in glass liquid temperature, flow rate and uniformity in each branch channel, such as Figure 1-4As shown, the present invention proposes a diversion channel for glass liquid flow in a one-furnace multi-line glass melting furnace, comprising a melting zone 1, a neck 2 and a diversion pool 3, wherein the front end inlet of the neck 2 is connected to the melting zone 1, and the rear end outlet is connected to the diversion pool 3, and when viewed from a top view, the central axis of the diversion pool 3 is coaxial with the central axis of the neck 2; the inside of the diversion pool 3 is provided with a diversion zone 31, a separation weir 32, an adjustment zone 33 and a plurality of branch passages 5 in sequence from front to back, the left and right ends of the separation weir 32 are respectively connected to the left and right inner walls of the diversion pool 3, the diversion zone 31 and the adjustment zone 33 are respectively located on the front and rear sides of the separation weir 32, and the plurality of branch passages 5 are arranged in sequence. The branch passages 5 are respectively connected to the rear end of the adjustment zone 33; the bottom surface of the diversion zone 31 is a plane, and the bottom surface of the adjustment zone 33 is also a plane, and the bottom surface height of the adjustment zone 33 is higher than the bottom surface height of the diversion zone 31; a flow inlet dam 4 is provided in the middle of the left side of the dividing weir 32, facing the outlet of the neck 2, and the flow inlet dam 4 and the dividing weir 32 are solidly integrated. The flow inlet dam 4 and the dividing weir 32 divide the glass liquid in the diversion zone 31 into left and right paths. The two paths of glass liquid respectively cross the dividing weir 32 from the left and right sides of the flow inlet dam 4 to enter the adjustment zone 33, and after being mixed in the adjustment zone 33, they flow out from multiple branch passages 5 at the same time.
[0025] The flow dam 4 has a flow surface 401, which is a convex arc surface, and its convex direction is toward the outlet of the neck 2. Its chord length is greater than the width of the neck 2. The width of the neck is Figure 2 The spacing between the inner walls of the clamp neck is shown.
[0026] The dividing weir 32 includes a base 321 and an adjusting portion 322. The base 321 is a rectangular parallelepiped structure as a whole, and its lower portion is fixed to the bottom of the diverter pool 3 as a whole. The left and right ends of the base 321 are respectively fixed to the left and right inner walls of the diverter pool 3; the adjusting portion 322 is a trapezoidal platform structure as a whole, and the bottom surface of the adjusting portion 322 is fixed to the upper surface of the base 321 as a whole, and the front side surface of the adjusting portion 322 is parallel to the rear side surface of the adjusting portion 322, and the left side surface and the right side surface of the adjusting portion 322 extend to the left and right inner walls of the diverter pool 3 respectively.
[0027] The left side of the adjusting portion 322 is provided with a first guide surface and a first intercepting surface. The first guide surface is an inclined surface parallel to the front end edge line of the left side surface, and the first guide surface simultaneously cuts the left side surface and the front side surface of the adjusting portion 322; the first intercepting surface is an inclined surface parallel to the rear end edge line of the left side surface, and the first intercepting surface simultaneously cuts the left side surface and the rear side surface of the adjusting portion 322; The right side surface of the adjusting portion 322 is provided with a second guide surface and a second cut-off surface. The second guide surface is an inclined surface parallel to the front end edge line of the right side surface, and the second guide surface simultaneously cuts the right side surface and the front side surface of the adjusting portion 322; the second cut-off surface is an inclined surface parallel to the rear end edge line of the right side surface, and the second cut-off surface simultaneously cuts the right side surface and the rear side surface of the adjusting portion 322.
[0028] The present invention realizes the effect of isothermal and equal-mass effective diversion of glass liquid in each branch passage 5 of a multi-line glass melting furnace. The present invention arranges a diversion zone 31 of the glass liquid and an adjustment zone 33 of the glass liquid behind the neck 2, and arranges the bottom height of the adjustment zone 33 to be higher than the bottom height of the diversion zone 31, so that the glass liquid can be fully uniform in the adjustment zone 33. Through model experiments, it is concluded that the bottom height of the adjustment zone 33 should be 50-250mm higher than the bottom height of the diversion zone 31.
[0029] The flow dividing area 31 and the adjusting area 33 are separated by a separating weir 32. The structure of the separating weir 32 is as follows: Figure 1-4 The bottom of the dividing weir 32 is closely built with the bottom of the diversion pool 3, the distance from the top surface of the dividing weir 32 to the bottom surface of the dividing weir 32 is the highest height of the dividing weir 32, and its value should be greater than the glass liquid level in the neck 2 by more than 80mm, and the upper and lower distances where the dividing weir 32 contacts the inner wall of the adjustment area 33 is the side height of the dividing weir 32, and its value should be not less than 50mm; the vertical surface of the incoming weir 4 opposite to the outlet of the neck 2 is an arc surface.
[0030] The area of the diversion zone 31 is S1, the area of the adjustment zone 33 is S2, the area of the melting zone 1 of the glass melting furnace is A, and if S1 / S2=B, then 10%≤B≤30%; if (S1+S2) / A=C, then 32%≤C≤38%. The melting zone area A can be calculated according to the usual glass melting furnace design principles.
[0031] The outlet end of the branch passage 5 is provided with a slope 501 rising backwards; the plurality of branch passages 5 are parallel to each other and have the same length. It should be noted that the maximum height of the slope 501 should be 80-150 mm lower than the glass liquid level in the adjustment area.
[0032] During glass production, the molten glass clarified and homogenized in the melting zone 1 flows into the neck 2, and at the outlet of the neck 2, the molten glass is diverted to the left and right sides in the diversion zone 31 through the flow surface 401 of the flow dam 4. In the process of the molten glass flowing to the left and right sides of the diversion pool 3, due to the inclined structure of the two wings of the dividing weir 32, the molten glass begins to gradually cross the dividing weir 32 and flow into the adjustment zone 33 according to the amount of pulling. After that, the molten glass is spread and mixed in the adjustment zone 33, and fully adjusted to achieve the performance required for molding, and finally flows into each branch passage 5, and then enters each processing branch line for glass molding, annealing and other operations to make commercial glass. Note that when the molten glass is about to flow into the entrance of each branch passage, its temperature difference is not more than 5°C.
[0033] The present invention can ensure to the maximum extent that the temperature of the glass liquid at the entrance of each branch glass liquid passage is the same, the flow rate is the same, and the physical and chemical properties of the glass liquid are highly uniform. The invention realizes the purpose of isothermal and equal-quality effective diversion of the glass liquid in each branch of a multi-line glass melting furnace, and can achieve high-quality and stable production. Example
[0034] Example 1: A photovoltaic glass melting furnace with one furnace and four lines with a daily melting capacity of 850 tons / day was designed. According to experimental calculations, the area A of the melting zone 1 is 340m 2 , the ratio of the area S1 of the diversion zone 31 plus the area S2 of the adjustment zone 33 to the area A of the melting zone 1 is 0.35, then S1+S2=0.35A=119m 2 , the ratio of the area S1 of the diversion zone 31 to the area S2 of the adjustment zone 33 is 0.31, then the area S1 of the diversion zone is 28.85m 2 , the area S2 of adjustment zone 33 is 90.15m 2 .
[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
[0036] Parts of the present invention not described in detail are prior art.
Claims
1. A glass flow diversion channel of a multi-line glass melting furnace, comprising a melting zone (1), a neck (2) and a diversion pool (3), characterized in that: The front inlet of the clamping neck (2) is connected to the melting zone (1), and the rear outlet is connected to the diversion pool (3). When viewed from above, the central axis of the diversion pool (3) is coaxial with the central axis of the clamping neck (2). The diversion pool (3) is provided with a diversion zone (31), a separation weir (32), an adjustment zone (33) and a plurality of branch passages (5) in sequence from front to back. The two ends of the separation weir (32) are respectively connected to the left and right inner walls of the diversion pool (3). The diversion zone (31) and the adjustment zone (33) are respectively located on the front and rear sides of the separation weir (32). The plurality of branch passages (5) are respectively connected to the rear end of the adjustment zone (33). The bottom surface of the zone (31) is a plane, and the bottom surface of the adjustment zone (33) is also a plane. The bottom surface height of the adjustment zone (33) is higher than the bottom surface height of the diversion zone (31). A flow inlet dam (4) is provided in the middle of the front side of the separation weir (32) directly opposite to the neck (2). The flow inlet dam (4) and the separation weir (32) are integrally formed. The flow inlet dam (4) and the separation weir (32) divide the glass liquid in the diversion zone (31) into two paths. The two paths of glass liquid respectively pass through the separation weir (32) from the left and right sides of the flow inlet dam (4) to enter the adjustment zone (33), and after being mixed in the adjustment zone (33), they flow out simultaneously from a plurality of branch paths (5).
2. The glass flow diversion channel of a multi-line glass melting furnace according to claim 1 is characterized by: The flow dam (4) has a flow surface (401), which is an outwardly convex arc surface, with its convex direction facing the outlet of the neck (2), and its chord length is greater than the width of the neck (2).
3. The glass flow diversion channel of a multi-line glass melting furnace in one furnace according to claim 1, characterized in that: The dividing weir (32) comprises a base (321) and an adjusting portion (322); the base (321) is an overall rectangular parallelepiped structure, the lower portion of which is integrally fixed to the bottom of the diverter pool (3), and the left and right ends of the base (321) are respectively integrally fixed to the left and right inner walls of the diverter pool (3); the adjusting portion (322) is an overall trapezoidal platform structure, the bottom surface of the adjusting portion (322) is integrally fixed to the upper surface of the base (321), the front side surface of the adjusting portion (322) is parallel to the rear side surface of the adjusting portion (322), and the left side surface and the right side surface of the adjusting portion (322) extend to the left and right inner walls of the diverter pool (3), respectively.
4. The glass flow diversion channel of a multi-line glass melting furnace according to claim 3 is characterized by: The regulating portion (322) is provided with a first flow guide surface and a first flow cut-off surface on its left side surface, the first flow guide surface being an inclined surface parallel to the front end edge line of the left side surface, and the first flow guide surface simultaneously cuts the left side surface and the front side surface of the regulating portion (322); the first flow cut-off surface is an inclined surface parallel to the rear end edge line of the right side surface, and the first flow cut-off surface simultaneously cuts the left side surface and the rear side surface of the regulating portion (322); The right side surface of the adjusting portion (322) is provided with a second guide surface and a second intercepting surface, the second guide surface is an inclined surface parallel to the front end edge line of the right side surface, and the second guide surface simultaneously cuts the right side surface and the front side surface of the adjusting portion (322); the second intercepting surface is an inclined surface parallel to the rear end edge line of the right side surface, and the second intercepting surface simultaneously cuts the right side surface and the rear side surface of the adjusting portion (322).
5. The glass flow diversion channel of a multi-line glass melting furnace according to claim 3, characterized in that: The height of the base (321) is not less than 50 mm. Assuming that the sum of the maximum heights of the base (321) and the adjustment portion (322) is H, and the height of the glass liquid level in the diversion area (31) is h, then Hh>80 mm.
6. The glass flow diversion channel of a multi-line glass melting furnace according to claim 1, characterized in that: The height difference between the bottom surface of the adjustment area (33) and the bottom surface of the diversion area (31) is 50-250 mm.
7. The glass flow diversion channel of a multi-line glass melting furnace according to claim 1, characterized in that: The area of the diversion zone (31) is S1, the area of the adjustment zone (33) is S2, and the area of the melting zone (1) of the glass melting furnace is A. If S1 / S2=B, then 10%≤B≤30%; if (S1+S2) / A=C, then 32%≤C≤38%.
8. The glass flow diversion channel of a multi-line glass melting furnace according to claim 1, characterized in that: The outlet end of the branch passage (5) is provided with a slope (501) rising backwards; the plurality of branch passages (5) are parallel to each other and have equal lengths.