A method for homogenizing the melt in a float glass furnace

Abstract

This invention discloses a method for homogenizing the melt in a float glass furnace, relating to the field of glass production technology. The method includes the following steps: Step 1, raw materials are continuously and uniformly fed into the melting zone of the glass furnace via a feeder for high-temperature melting, and the furnace is first stirred by gas bubbling within the melting zone; Step 2, the molten glass enters a neck, where it is secondarily stirred by a combination of vertical stirrer and gas bubbling. This method enhances the homogenization effect by adding gas bubbling at the neck for glass homogenization. Furthermore, the bubbles disperse into the molten glass as the blades rotate, generating micro-convection. As the microbubbles rise, they drive local melt flow, enhancing boundary layer mixing.

Description

Technical Field

[0001] This invention relates to the field of glass production technology, specifically to a method for homogenizing the melt in a float glass furnace. Background Technology

[0002] The entire float glass production line is a long, continuous operation, often several hundred meters in length. Its process can be summarized into the following five main stages:

[0003] I. Batching and Melting: The above raw materials are mixed evenly in precise proportions, and the mixed raw materials are sent into the melting furnace through a conveying device. The melting furnace is usually a huge pool furnace built of refractory bricks, with a temperature as high as about 1600℃. The raw materials are heated at high temperature here and melted into a uniform, bubble-free glass liquid.

[0004] 2. Tin Bath Forming: This is the most core and unique step in the float glass process. Molten glass flows out from the end of the furnace and floats continuously on the tin bath filled with protective gases (inert gas and hydrogen) through an adjusting gate (edge ​​puller).

[0005] In the prior art, the glass melt is homogenized by bubbling in the melting zone of the melting furnace and adding mechanical stirring in the bottleneck area. For example, the patent with publication number CN209685569U proposes a horizontal vertical stirrer suitable for glass melting furnace, which uses multiple sets of stirring rakes to stir the raw materials at the bottleneck.

[0006] However, simply using mechanical agitation at the bottleneck point leads to two major blind spots: 1. Insufficient mixing near the wall: The gap between the agitator and the pool wall at the bottleneck point easily forms a low-speed zone, which is difficult to cover with traditional agitation; 2. Axial stratification: Ordinary agitators mainly affect radial mixing, and axial (upper and lower) temperature / composition differences may still exist. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a method for homogenizing the melt in a float glass furnace, which solves the problems of insufficient mixing near the wall and axial stratification.

[0008] To achieve the above objectives, the present invention provides a method for homogenizing the melt in a float glass furnace, comprising the following steps:

[0009] Step 1: The raw materials are continuously and evenly fed into the melting zone of the glass melting furnace through a feeding machine for high-temperature melting. The first stirring is carried out in the melting zone by gas bubbling.

[0010] Step 2: The molten glass enters the neck, where it is agitated a second time using a combination of vertical stirrer and gas bubbling.

[0011] Step 3: The stirred clarified glass liquid enters the clarification zone and gradually flows into the tin bath.

[0012] Furthermore, in step two, gas is bulged out from the stirring head of the vertical stirrer, which has a structure with pores.

[0013] Furthermore, the stirring head includes a blade body, which is formed by alternating rigid support plates and perforated plates to form a columnar structure. The middle part of the columnar structure is a cavity channel, inert gas is introduced into the cavity channel, and the inert gas bulges out from the pores of the perforated plate.

[0014] Furthermore, the vertical stirrer also includes: a main shaft, at least three sets of stirring heads evenly arranged outside the main shaft, each stirring head capable of independently rising or falling axially relative to the main shaft; the stirring head descends and inserts into the molten glass to stir the molten glass; the stirring head rises and detaches from the molten glass to clean; and a cleaning drive mechanism, which in the cleaning state controls the stirring head to rotate at high speed to cause the molten glass entering the pores of the porous plate to detach from the pores.

[0015] Furthermore, the stirring head includes an assembly frame for assembling the blade body and a rotating shaft body for driving the assembly frame to rotate; the outer surface of the main shaft is provided with a guide groove along the axial direction, and a side frame is provided in the area of ​​the main shaft opposite to the guide groove. An axially sliding block is provided between the side frame and the guide groove, and the rotating shaft body is rotatably mounted on the block; the cleaning drive mechanism includes: an inner incomplete gear ring, which is located on the upper periphery of the side frame and does not rotate with the main shaft; an acceleration gear set, which is located on the upper end of the side frame and can drive the acceleration gear set through the tooth area of ​​the inner incomplete gear ring when the side frame rotates with the main shaft; and a rotation gear, which is mounted on the rotating shaft body. When the rotating shaft body rises to detach the blade body from the molten glass, the rotation gear can mesh with the acceleration gear set to form a state of high-speed rotation of the blade body.

[0016] Furthermore, it also includes a bracket, which is fixed above the neck. A cylindrical body is provided on the area of ​​the bracket opposite to the main shaft. The inner wall of the cylindrical body is provided with a bottom arc groove, a first inclined groove, a top arc groove, and a second inclined groove that can form a closed loop. A bearing seat is rotatably installed on the upper end of the rotating shaft body. A slider is provided on one side of the bearing seat. The slider can move in the bottom arc groove, the first inclined groove, the top arc groove, and the second inclined groove when rotating with the main shaft, forming a state in which the rotating shaft body continuously rises and falls.

[0017] Furthermore, it also includes an adjustment mechanism for driving the cylinder to rotate intermittently; a connecting frame is fixed between the cylinder and the inner incomplete toothed ring, so that the cylinder and the inner incomplete toothed ring rotate synchronously to adjust the position of the first inclined groove and the teeth of the inner incomplete toothed ring above the neck, so that different positions above the neck form cleaning stations.

[0018] Furthermore, the adjusting mechanism includes: an external gear ring, which is fixed to the periphery of the cylinder, and a second gear meshes with one side of the external gear ring, the second gear being rotatably mounted on the bracket via a limiting shaft; and an external incomplete gear ring, which is fixed to the main shaft via spokes, and a first gear is fixed at the upper end of the limiting shaft, the first gear being able to mesh with the teeth of the external incomplete gear ring.

[0019] Furthermore, the positioning mechanism also includes: a limiting arc frame, which is fixed to the periphery of the outer incomplete tooth ring by spokes, the limiting arc frame being a notched arc ring with the notch positioned opposite to the tooth portion of the outer incomplete tooth ring; and a limiting seat, which is fixed to the upper end of the first gear, with a limiting groove formed on the upper surface of the limiting seat, allowing the limiting arc frame to enter the limiting seat when rotating, thereby restricting the rotation of the limiting shaft.

[0020] Furthermore, the upper end of the main shaft is provided with an inert gas tube, the main shaft is a hollow tubular structure, and the main shaft is also provided with a gas chamber; a stainless steel corrugated pipe, the main body of the rotating shaft is a hollow tubular structure, the stainless steel corrugated pipe is connected between the gas chamber and the upper end of the main body of the rotating shaft through a connector, and the assembly frame is provided with a gas channel for connecting the main body of the rotating shaft and the blade body.

[0021] The present invention has the following beneficial effects:

[0022] (1) The float glass furnace melt homogenization method provided in this embodiment of the invention adds a gas bubbling method at the bottleneck to homogenize the glass melt, thereby enhancing the homogenization effect.

[0023] (2) The method for homogenizing the float glass furnace melt by dispersing bubbles into the glass melt as the blade body rotates creates three situations: First, micro-convection, where the rising microbubbles drive local melt flow and enhance boundary layer mixing; Second, bubble merging promotion: microbubbles, as "seeds," can collide and merge with existing small bubbles in the glass melt, accelerating clarification and being more efficient than traditional stirring; Third, it also solves the "two major blind spots" caused by simply using mechanical stirring at the bottleneck in the existing technology. These two blind spots are: 1. Insufficient mixing near the wall: the gap between the stirring blade and the pool wall at the bottleneck easily forms a low-speed zone, which is difficult to cover with traditional stirring. However, the bubbles released from the porous part of the blade body can diffuse into this area, eliminating component segregation; 2. Axial stratification: ordinary stirring blades mainly affect radial mixing, and axial (upper and lower) temperature / composition differences may still exist. The rising flow of microbubbles can drive axial circulation and achieve three-dimensional homogenization.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] Figure 1 This is a process flow diagram of the present invention;

[0026] Figure 2 This is a diagram showing the installation location of the mechanical stirring device of the present invention;

[0027] Figure 3 For the present invention Figure 2 A partial view;

[0028] Figure 4 This is a schematic diagram of the installation of the driving component of the present invention;

[0029] Figure 5 This is a schematic diagram of the mechanical stirring device of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the blade body of the present invention;

[0031] Figure 7 For the present invention Figure 5 Exploded view;

[0032] Figure 8 This is a schematic diagram showing the position of the stainless steel corrugated pipe of the present invention;

[0033] Figure 9 This is an assembly diagram of the slider and the cylinder of the present invention;

[0034] Figure 10 This is a schematic diagram of the cleaning drive mechanism of the present invention;

[0035] Figure 11 This is a top view of the cylinder of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of the stirring head of the present invention;

[0037] Figure 13 This is a schematic diagram of the adjustment mechanism of the present invention;

[0038] Figure 14 This is a schematic diagram of the accelerating gear set of the present invention;

[0039] Figure 15 This is a bottom view of the cylindrical body of the present invention;

[0040] In the diagram, 1. Melting zone; 2. Neck; 3. Refining zone; 4. Inert gas pipe; 5. Drive assembly; 51. Motor; 52. Worm gear; 53. Turbine; 6. Stirring head; 61. Shaft body; 611. Bearing seat; 612. Slider; 62. Blade body; 621. Rigid support plate; 622. Perforated plate; 63. Assembly frame; 7. Adjustment mechanism; 71. External incomplete gear ring; 72. Spoke; 73. Limiting arc frame; 74. Limiting seat; 741. Limiting groove; 75. First gear; 76. Limiting shaft; 77. Second gear; 78. External... 8. Gear ring 1; 8. Cleaning drive mechanism; 81. Incomplete inner gear ring; 82. Acceleration gear set; 821. Third gear; 822. Acceleration gear 1; 823. Acceleration gear 2; 824. Acceleration gear 3; 83. Rotating gear; 9. Support; 10. Main shaft; 101. Guide groove; 102. Side frame; 103. Air chamber; 11. Carrier block; 12. Cylinder; 121. Bottom arc groove; 122. First inclined groove; 123. Top arc groove; 124. Second inclined groove; 13. Support ring; 14. Connecting frame; 15. Stainless steel corrugated pipe; 151. Connector. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0043] The following is based on Figures 1-15This invention describes a method for homogenizing the melt in a float glass furnace, as provided in an embodiment of the present invention.

[0044] Please see Figures 1-4 As shown, this embodiment of the invention provides a method for homogenizing the melt in a float glass furnace, comprising the following steps:

[0045] Step 1: The raw materials are continuously and evenly fed into the melting zone 1 of the glass melting furnace through a feeding machine for high-temperature melting. The first stirring is carried out in the melting zone 1 by gas bubbling.

[0046] Step 2: The molten glass enters the neck 2 and is then stirred a second time within the neck 2 by a combination of vertical stirrer and gas bubbling.

[0047] Step 3: The stirred clarified glass liquid enters the clarification zone 3 and gradually enters the tin bath.

[0048] Because the float glass furnace melt homogenization method provided in this embodiment of the invention adds a gas bubbling method at the bottleneck 2 to homogenize the glass melt, the homogenization effect is enhanced.

[0049] At least two vertical mixers are arranged side by side in the area of ​​the neck 2; in this embodiment, four are arranged.

[0050] Preferably, in order to improve the uniformity of gas bubbling at the bottleneck 2, in step two above, the gas is bubbled out from the stirring head 6 of the vertical stirrer. The stirring head 6 of the vertical stirrer has a structure with air holes, thereby achieving a better material uniformity effect.

[0051] Furthermore, in combination Figure 5 and Figure 6 As shown, the stirring head 6 includes a blade body 62. The blade body 62 is formed by alternating rigid support plates 621 and perforated plates 622 to form a columnar structure. The middle part of the columnar structure is a cavity channel. Inert gas is introduced into the cavity channel and bulges out from the pores of the perforated plates 622. Thus, when the blade body 62 rotates, it can bubble in different areas of the neck 2, thereby enhancing the homogenization effect.

[0052] Preferably, the rigid support plate 621 is a platinum-rhodium alloy or zirconia-toughened mullite, and the porous plate 622 is a porous ceramic, porous silicon nitride, or porous zirconia. It needs to be prepared by a "slurry casting + sintering" process to ensure that the pores are connected and evenly distributed. The gas introduced into the cavity channel is an inert gas.

[0053] During this process, the bubbles are dispersed into the molten glass as the blade body 62 rotates, resulting in three situations. First, micro-convection occurs when the microbubbles rise, driving local melt flow and enhancing boundary layer mixing (especially the "dead zone" at the blade edge).

[0054] Secondly, bubble merging is promoted: microbubbles, as "seeds", can collide and merge with existing small bubbles (<10μm) in the glass melt, accelerating clarification (more efficient than traditional stirring).

[0055] Thirdly, it also solves the "two major blind spots" caused by simply using mechanical stirring at the bottleneck 2 in the existing technology. These two blind spots are: 1. Insufficient mixing near the wall: The gap (50-100mm) between the stirring blade and the pool wall at the bottleneck 2 is prone to forming a low-speed zone, which is difficult to cover by traditional stirring. However, the bubbles released from the porous part of the blade body 62 can diffuse into this area, eliminating component segregation; 2. Axial stratification: Ordinary stirring blades mainly affect radial mixing, and axial (upper and lower) temperature / composition differences may still exist. The rising flow of microbubbles can drive axial circulation and achieve three-dimensional homogenization.

[0056] In practice, because the blade body 62 has a porous plate 622 structure, after long-term use, the porous plate 622 becomes clogged with molten glass, preventing continuous gas output. Therefore, to solve this problem, combined with... Figures 5-10 As shown, the vertical stirrer also includes a main shaft 10, and at least three sets of stirring heads 6 are evenly arranged outside the main shaft 10. Each stirring head 6 can independently rise or fall axially relative to the main shaft 10. When the stirring head 6 falls and is inserted into the molten glass, it can perform mechanical and bubbling homogenization of the molten glass as the main shaft 10 rotates. That is, the stirring head 6 is in the stirring state at this stage. When the stirring head 6 rises and detaches from the molten glass, it continuously exhausts gas. This gas can provide pressure to the pores of the porous plate 622, causing the molten glass to detach from the pores. The stirring head 6 is also equipped with a cleaning drive mechanism 8, which can drive the stirring head 6 to rotate at high speed after it rises and detaches from the molten glass, thereby further ensuring that the molten glass in the pores of the porous plate 622 detaches from the pores. That is, the stirring head 6 is in the cleaning state at this stage.

[0057] like Figure 5 and Figure 7 As shown, in order to enable the cleaning drive mechanism 8 to drive the stirring head 6 to rotate at high speed after it rises and detaches from the molten glass, the stirring head 6 here also includes an assembly frame 63 for assembling the blade body 62 and a rotating shaft body 61 for driving the assembly frame 63 to rotate. The assembly frame 63 is a horizontal columnar structure, and each assembly frame 63 is equipped with two blade bodies 62. The two blade bodies 62 are respectively assembled below the two ends of the assembly frame 63.

[0058] Secondly, a guide groove 101 is provided on the outer surface of the main shaft 10. A side frame 102 is provided in the area of ​​the main shaft 10 opposite to the guide groove 101. An axially sliding block 11 is provided between the side frame 102 and the guide groove 101. The rotating shaft body 61 is rotatably mounted on the block 11, and the mounting frame 63 is located below the block 11. When the block 11 moves up and down between the guide groove 101 and the side frame 102, the entire stirring head 6 can rise and fall.

[0059] In addition, the guide groove 101 is preferably a T-shaped groove, which can also play a limiting role.

[0060] Furthermore, the aforementioned cleaning drive mechanism 8 includes an inner incomplete gear ring 81, an acceleration gear set 82, and a self-rotating gear 83. The inner incomplete gear ring 81 is located on the upper outer periphery of the side frame 102, and the inner incomplete gear ring 81 does not rotate with the main shaft 10 (the method of fixing the inner incomplete gear ring 81 so that it does not rotate with the main shaft 10 will be described below). The acceleration gear set 82 is located at the upper end of the side frame 102. When the side frame 102 rotates with the main shaft 10, it can drive the acceleration gear set 82 through the tooth area of ​​the inner incomplete gear ring 81. When the acceleration gear set... When the blade body 62 passes through the tooth area of ​​the incomplete inner toothed ring 81, the acceleration gear set 82 will rotate, and the self-rotating gear 83 is installed on the rotating shaft body 61. Thus, when the rotating shaft body 61 rises to the highest point, the blade body 62 will completely detach from the molten glass. At the same time, the self-rotating gear 83 can reach a position at the same height as the acceleration gear set 82. At this time, the self-rotating gear 83 meshes with the acceleration gear set 82, so the acceleration gear set 82 can drive the rotating shaft body 61 to rotate by driving the self-rotating gear 83 to achieve a high-speed self-rotation state for the entire stirring head 6.

[0061] like Figure 14 Preferably, the aforementioned acceleration gear set 82 includes an acceleration gear three 824 rotatably mounted on the inner side above the side frame 102, an acceleration gear two 823 located above and coaxial with the acceleration gear three 824, an acceleration gear one 822 meshing with the acceleration gear two 823 on the side away from the main shaft 10, and a third gear 821 located below and coaxial with the acceleration gear one 822. The third gear 821 can mesh with the teeth of the inner incomplete gear ring 81, and the acceleration gear three 824 can mesh with the rotating gear 83.

[0062] It should be noted that, in order to achieve the above objectives, the blade body 62 must first be raised to the required height before the acceleration gear set 82 begins to mesh with the tooth area of ​​the inner incomplete tooth ring 81, and only then will the high-speed liquid throwing action begin.

[0063] Combination Figures 9-12 As shown, in order to achieve the lifting of the blade body 62 and the assembly of the main shaft 10, the present invention also provides a support 9 (such as...). Figure 3As shown, a drive assembly 5 for driving the main shaft 10 to rotate is also provided on the side of the bracket 9. The bracket 9 is fixed above the neck 2. A cylinder 12 is provided on the area of ​​the bracket 9 opposite to the main shaft 10. The cylinder 12 serves as the drive component for the lifting and lowering of the blade body 62. Specifically, the inner wall of the cylinder 12 is provided with a bottom arc groove 121, a first inclined groove 122, a top arc groove 123, and a second inclined groove 124 that can form a closed loop. A bearing seat 611 is rotatably installed on the upper end of the rotating shaft body 61. A slider 612 is provided on one side of the bearing seat 611. When the slider 612 rotates with the main shaft 10, it can move within the bottom arc groove 121, the first inclined groove 122, the top arc groove 123, and the second inclined groove 124, forming a state in which the rotating shaft body 61 continuously rises and falls. Preferably, the slider 612 is spherical or T-shaped, and the cross-sectional shape of the bottom arc groove 121, the first inclined groove 122, the top arc groove 123, and the second inclined groove 124 is adapted to it to restrict the slider 612 from disengaging. The drive assembly 5 includes a motor 51, a worm gear 52 and a turbine 53. The turbine 53 is fixed at a position near the upper end of the main shaft 10. The worm gear 52 meshes between multiple turbines 53. The motor 51 is used to drive the worm gear 52 to rotate.

[0064] This implementation plan includes the following stages:

[0065] 1) When the slider 612 is located in the bottom arc groove 121, the height of the entire blade body 62 reaches its lowest point. At this time, it is inserted into the glass liquid and stirs the glass liquid by slowly rotating with the main shaft 10.

[0066] 2) When the slider 612 enters the first inclined groove 122 from the bottom arc groove 121, it is limited by the first inclined groove 122. The slider 612 rises along the first inclined groove 122, driving the entire stirring head 6 to rise until the slider 612 enters the junction of the first inclined groove 122 and the top arc groove 123. At this time, the entire blade body 62 is completely separated from the glass liquid, and the self-rotating gear 83 reaches the area of ​​the acceleration gear set 82 and meshes with the acceleration gear set 82 (at this time, the acceleration gear set 82 has not yet reached the tooth area of ​​the inner incomplete tooth ring 81, so the acceleration gear set 82 will not rotate and it meshes with the self-rotating gear 83 in a stationary state).

[0067] 3) When the slider 612 enters the top arc groove 123, the acceleration gear set 82 begins to mesh into the tooth area of ​​the inner incomplete tooth ring 81, thereby the acceleration gear set 82 begins to drive the self-rotating gear 83 to rotate at high speed, and perform high-speed centrifugal cleaning on the blade body 62. Before the slider 612 leaves the top arc groove 123, the acceleration gear set 82 leaves the tooth area of ​​the inner incomplete tooth ring 81.

[0068] 4) When the slider 612 enters the second inclined groove 124 from the top arc groove 123, the slider 612 gradually moves down in the second inclined groove 124, thereby driving the entire stirring head 6 to move downward. The self-rotating gear 83 disengages from the acceleration gear set 82 until the blade body 62 is completely inserted into the glass solution. At this time, the slider 612 moves from the second inclined groove 124 to the bottom arc groove 121 and slides in the slider 612. At this time, the blade body 62 is in the stirring state.

[0069] In the above scheme, since the positions of the first inclined groove 122 and the tooth area of ​​the inner incomplete toothed ring 81 are fixed, the cleaning state of all the stirring heads 6 is located in the area opposite to the position of the tooth area of ​​the inner incomplete toothed ring 81. Assuming that the tooth area of ​​the inner incomplete toothed ring 81 is used as the cleaning station, the position of the cleaning station will always remain unchanged, which will cause the cleaning station to be unable to perform the mixing and uniform material operation. Therefore, the embodiment of the present invention also provides an adjustment mechanism 7 for driving the cylinder 12 and the inner incomplete toothed ring 81 to rotate synchronously and intermittently, thereby intermittently adjusting the positions of the first inclined groove 122 and the tooth area of ​​the inner incomplete toothed ring 81, so as to ensure that each area in the area traversed by the stirring head 6 alternates to become the cleaning station, that is, to ensure that each position can become the mixing area and ensure the mixing effect.

[0070] Specifically, a connecting frame 14 is fixed between the cylinder 12 and the inner incomplete toothed ring 81, so that the cylinder 12 and the inner incomplete toothed ring 81 rotate synchronously to adjust the position of the teeth of the perforated plate 622 and the inner incomplete toothed ring 81 above the neck 2, so that different positions above the neck 2 form cleaning stations.

[0071] Preferably, a support ring 13 is provided around the outer periphery of the cylinder 12 to support the cylinder 12 on the bracket 9.

[0072] Combination Figure 5 , Figure 7 and Figure 13 As shown, the aforementioned adjusting mechanism 7 includes an outer toothed ring 78 and an outer incomplete toothed ring 71. The outer toothed ring 78 is fixed to the periphery of the cylinder 12. When the outer toothed ring 78 rotates synchronously, a second gear 77 meshes with one side of the outer toothed ring 78. The second gear 77 is rotatably mounted on the bracket 9 via a limiting shaft 76. The outer incomplete toothed ring 71 is fixed to the main shaft 10 via spokes 72. A first gear 75 is fixed at the upper end of the limiting shaft 76. The first gear 75 can mesh with the teeth of the outer incomplete toothed ring 71.

[0073] In this embodiment, when the main shaft 10 drives the stirring head 6 to rotate, the outer incomplete toothed ring 71 on the main shaft 10 rotates accordingly. When the tooth area of ​​the outer incomplete toothed ring 71 reaches the first gear 75 and meshes with it, the first gear 75 can drive the outer toothed ring 78 to rotate through the limiting shaft 76 and the second gear 77, thereby enabling the cylinder 12 to rotate at a certain angle and realize the intermittent rotation of the cylinder 12.

[0074] In summary, for each rotation of the main shaft 10, the cylinder 12 and the inner incomplete toothed ring 81 rotate by the required angle (e.g., 100°). At this time, the positions of the tooth areas of the first inclined groove 122 and the inner incomplete toothed ring 81 also change synchronously, which is manifested as changing the position of the cleaning station when the blade body 62 rotates at high speed.

[0075] It should be noted that, since the cylinder 12 in this embodiment is rotatably mounted on the bracket 9, the position of the cylinder 12 cannot be stable when the non-toothed area of ​​the outer incomplete toothed ring 71 is opposite to the first gear 75. It may rotate due to the thrust of the bearing seat 611, which makes it impossible to stably control the lifting and lowering of the stirring head 6. Therefore, a limiting structure should be provided for the cylinder 12 to limit its position locking when it does not need to rotate (when the non-toothed area of ​​the outer incomplete toothed ring 71 is opposite to the first gear 75). Therefore, the above-mentioned adjusting mechanism 7 also includes a limiting arc frame 73 and a limiting seat 74. The limiting arc frame 73 is fixed to the periphery of the outer incomplete toothed ring 71 by spokes 72. The limiting arc frame 73 is an arc ring with a notch, and the notch is opposite to the tooth of the outer incomplete toothed ring 71. The limiting seat 74 is fixed to the upper end of the first gear 75. A limiting groove 741 is opened on the upper surface of the limiting seat 74, and the limiting arc frame 73 can enter the limiting seat 74 when it rotates.

[0076] In this embodiment, when the non-toothed area of ​​the outer incomplete toothed ring 71 is opposite to the first gear 75, the limiting arc frame 73 is located in the limiting groove 741 to restrict the rotation of the limiting seat 74 and the limiting shaft 76. Thus, the second gear 77 can restrict the rotation of the outer toothed ring 78, so that the outer toothed ring 78 restricts the rotation of the cylinder 12, thereby ensuring the stable control of the lifting and lowering of the stirring head 6 by the cylinder 12. When the toothed area of ​​the outer incomplete toothed ring 71 is opposite to the first gear 75, the limiting arc frame 73 disengages from the limiting groove 741, and the notch of the limiting arc frame 73 aligns with the limiting groove 741. Thus, the toothed area of ​​the outer incomplete toothed ring 71 can freely drive the first gear 75 to rotate, thereby driving the outer toothed ring 78 to rotate.

[0077] Furthermore, in order to facilitate the introduction of inert gas into the blade body 62, an inert gas pipe 4 is provided at the upper end of the main shaft 10. The main shaft 10 is a hollow tubular structure, and a gas chamber 103 is also provided on the main shaft 10. The inert gas enters the interior of the main shaft 10 through the inert gas pipe 4 and enters the gas chamber 103.

[0078] The shaft body 61 is a hollow tubular structure. The stainless steel corrugated pipe 15 is connected between the gas chamber 103 and the upper end of the shaft body 61 through the connector 151. The assembly frame 63 is provided with a gas channel for connecting the shaft body 61 and the blade body 62, so that inert gas can enter the blade body 62.

[0079] During use (operation), the raw materials are continuously and evenly fed into the melting zone 1 of the glass melting furnace via a feeder for high-temperature melting. The initial stirring in the melting zone 1 is achieved through gas bubbling. The molten glass then enters the neck 2, where a secondary stirring is performed using a combination of vertical agitator and gas bubbling. During this process, the drive assembly 5 drives the main shaft 10 to rotate. As the main shaft 10 rotates, the carrier block 11 drives the stirring head 6 to rotate. When the stirring head 6 rotates, gas enters the interior of the blade body 62 and bubbles out from the holes in the perforated plate 622. Simultaneously, as the main shaft 10 rotates, the slider 612 moves with it. When the shaft 10 rotates, it can move within the bottom arc groove 121, the first inclined groove 122, the top arc groove 123, and the second inclined groove 124, forming a state in which the main body of the rotating shaft 61 continuously rises and falls, including the following stages: 1) When the slider 612 is located in the bottom arc groove 121, the height of the entire blade body 62 reaches its lowest point. At this time, it is inserted into the molten glass and stirs the molten glass as the main shaft 10 rotates slowly; 2) When the slider 612 enters the first inclined groove 122 from the bottom arc groove 121, it is limited by the first inclined groove 122, and the slider 612 rises along the first inclined groove 122, driving the entire stirring head 6 to rise until the slider... 612 enters the junction of the first inclined groove 122 and the top arc groove 123. At this time, the entire blade body 62 is completely separated from the molten glass, and the rotating gear 83 moves upward to the area of ​​the acceleration gear set 82 and meshes with the acceleration gear set 82 (at this time, the acceleration gear set 82 has not yet reached the tooth area of ​​the inner incomplete tooth ring 81, so the acceleration gear set 82 will not rotate and it meshes with the rotating gear 83 in a stationary state); 3) When the slider 612 enters the top arc groove 123, the acceleration gear set 82 begins to mesh with the tooth area of ​​the inner incomplete tooth ring 81, so the acceleration gear set 82 begins to drive the rotating gear 83 to rotate at high speed, performing high-speed centrifugal cleaning on the blade body 62. Theoretically, before the slider 612 leaves the top arc groove 123, the acceleration gear set 82 disengages from the tooth area of ​​the inner incomplete tooth ring 81; 4) When the slider 612 enters the second inclined groove 124 from the top arc groove 123, the slider 612 gradually moves down in the second inclined groove 124, thereby driving the entire stirring head 6 to move down, the self-rotating gear 83 disengages from the acceleration gear set 82, until the blade body 62 is completely inserted into the glass solution, at which point the slider 612 moves from the second inclined groove 124 to the bottom arc groove 121 and slides in the slider 612. At this time, the blade body 62 is in the stirring state (in the stirring state, the stirring head 6 does not rotate on its own, but only revolves with the main shaft 10).

[0080] In addition, the aforementioned adjusting mechanism 7 is used to intermittently adjust the positions of the mixing station and the cleaning station.

[0081] The stirred clarified glass liquid enters the clarification zone 3 and gradually flows into the tin bath.

[0082] Because the float glass furnace melt homogenization method provided in this embodiment of the invention adds a gas bubbling method at the bottleneck 2 to homogenize the glass melt, the homogenization effect is enhanced.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0084] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for homogenizing the melt in a float glass furnace, characterized in that, Includes the following steps: Step 1: The raw materials are continuously and evenly fed into the melting zone (1) of the glass melting furnace through the feeding machine for high-temperature melting. The first stirring is carried out in the melting zone (1) by gas bubbling. Step 2: The molten glass enters the neck (2) and is stirred a second time in the neck (2) by a combination of vertical stirrer and gas bubbling. Step 3: The stirred clarified glass liquid enters the clarification zone (3) and gradually enters the tin bath; In step two, gas is bulged out from the stirring head (6) of the vertical stirrer, which has a structure with pores. The stirring head (6) includes a blade body (62), which is formed by alternating rigid support plates (621) and porous plates (622) to form a columnar structure. The middle part of the columnar structure is a cavity channel, inert gas is introduced into the cavity channel, and inert gas bulges out from the pores of the porous plate (622). The vertical mixer also includes: The main shaft (10) has at least three sets of stirring heads (6) which are evenly arranged on the outside of the main shaft (10). Each stirring head (6) can rise or fall independently of the main shaft (10) axially. The stirring head (6) descends and is inserted into the molten glass to stir the molten glass; The stirring head (6) rises and detaches from the molten glass, entering a cleaning state; Cleaning drive mechanism (8) In the cleaning state, the cleaning drive mechanism (8) can control the stirring head (6) to rotate at high speed so that the glass liquid entering the pores of the porous plate (622) can be separated from the pores; The stirring head (6) includes an assembly frame (63) for assembling the blade body (62) and a rotating shaft body (61) for driving the assembly frame (63) to rotate. The outer surface of the main shaft (10) is provided with a guide groove (101) along the axial direction. A side frame (102) is provided in the area of ​​the outside of the main shaft (10) opposite to the guide groove (101). An axially sliding block (11) is provided between the side frame (102) and the guide groove (101). The main body of the rotating shaft (61) is rotatably mounted on the block (11). The cleaning drive mechanism (8) includes: An incomplete inner toothed ring (81) is located on the upper periphery of the side frame (102), and the incomplete inner toothed ring (81) does not rotate with the main shaft (10); Acceleration gear set (82), the acceleration gear set (82) is located on the upper end of the side frame (102), and the side frame (102) can drive the acceleration gear set (82) through the tooth area of ​​the inner incomplete tooth ring (81) when it rotates with the main shaft (10); The rotating gear (83) is mounted on the rotating shaft body (61). When the rotating shaft body (61) rises and the blade body (62) is separated from the molten glass, the rotating gear (83) can mesh with the acceleration gear set (82) to form a state of high-speed rotation of the blade body (62). It also includes a bracket (9), which is fixed above the neck (2). The bracket (9) has a cylindrical body (12) in the area opposite to the main shaft (10). The inner wall of the cylindrical body (12) has a bottom arc groove (121), a first inclined groove (122), a top arc groove (123), and a second inclined groove (124) that can form a closed loop. The upper end of the rotating shaft body (61) is rotatably mounted with a bearing seat (611). A slider (612) is provided on one side of the bearing seat (611). When the slider (612) rotates with the main shaft (10), it can move in the bottom arc groove (121), the first inclined groove (122), the top arc groove (123), and the second inclined groove (124), forming a state in which the rotating shaft body (61) continuously rises and falls.

2. The method for homogenizing the melt in a float glass furnace according to claim 1, characterized in that, It also includes a positioning mechanism (7) for intermittently rotating the cylinder (12); A connecting frame (14) is fixed between the cylinder (12) and the inner incomplete toothed ring (81) so that the cylinder (12) and the inner incomplete toothed ring (81) rotate synchronously to adjust the position of the first inclined groove (122) and the teeth of the inner incomplete toothed ring (81) above the neck (2) so that different positions above the neck (2) form cleaning stations.

3. The method for homogenizing the melt in a float glass furnace according to claim 2, characterized in that, The adjustment mechanism (7) includes: External gear ring 1 (78) is fixed to the periphery of the cylinder (12). A second gear (77) is meshed on one side of the external gear ring 1 (78). The second gear (77) is rotatably mounted on the bracket (9) through a limiting shaft (76). An incomplete toothed ring (71) is fixed to the main shaft (10) by spokes (72). A first gear (75) is fixed at the upper end of the limiting shaft (76). The first gear (75) can mesh with the teeth of the incomplete toothed ring (71).

4. The method for homogenizing the melt in a float glass furnace according to claim 3, characterized in that, The adjustment mechanism (7) further includes: The limiting arc frame (73) is fixed to the periphery of the outer incomplete toothed ring (71) by spokes (72). The limiting arc frame (73) is an arc ring with a notch, and the notch is opposite to the tooth position of the outer incomplete toothed ring (71). The limiting seat (74) is fixed to the upper end of the first gear (75). A limiting groove (741) is opened on the upper surface of the limiting seat (74). When the limiting arc frame (73) rotates, it can enter the limiting seat (74) to limit the rotation of the limiting shaft (76).

5. A method for homogenizing the melt in a float glass furnace according to any one of claims 2-4, characterized in that, The upper end of the main shaft (10) is provided with an inert gas pipe (4). The main shaft (10) is a hollow tubular structure. The main shaft (10) is also provided with a gas chamber (103). The stainless steel corrugated pipe (15) and the rotating shaft body (61) are hollow tubular structures. The stainless steel corrugated pipe (15) is connected between the gas chamber (103) and the upper end of the rotating shaft body (61) through a connector (151). The assembly frame (63) is provided with a gas channel for connecting the rotating shaft body (61) and the blade body (62).

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